Merge pull request #86 from scossu/refactor_dstructs

Refactor dstructs

.gitignore

@@ -106,8 +106,25 @@ venv.bak/
 # Pytest
 .pytest_cache/
 
-# Default LAKEsuperior data directories
-/data
-#/lakesuperior/store/base_lmdb_store.c
-#/lakesuperior/store/ldp_rs/lmdb_triplestore.c
+# Default Lakesuperior data directories
+lakesuperior/data/ldprs_store
+lakesuperior/data/ldpnr_store
+
+# Cython business.
+/cython_debug
+/lakesuperior/store/*.c
+/lakesuperior/store/*.html
+/lakesuperior/store/ldp_rs/*.c
+/lakesuperior/store/ldp_rs/*.html
+/lakesuperior/model/*.c
+/lakesuperior/model/*/*.html
+/lakesuperior/model/*/*.c
+/lakesuperior/model/*.html
+/lakesuperior/util/*.c
+/lakesuperior/util/*.html
 !ext/lib
+
+# Vim CTags file.
+tags
+
+!.keep

.gitmodules

@@ -0,0 +1,12 @@
+[submodule "ext/lmdb"]
+    path = ext/lmdb
+    url = https://github.com/LMDB/lmdb.git
+[submodule "ext/tpl"]
+    path = ext/tpl
+    url = https://github.com/troydhanson/tpl.git
+[submodule "ext/spookyhash"]
+    path = ext/spookyhash
+    url = https://github.com/centaurean/spookyhash.git
+[submodule "ext/collections-c"]
+    path = ext/collections-c
+    url = https://github.com/srdja/Collections-C.git

.travis.yml

@@ -3,11 +3,14 @@ language: python
 matrix:
     include:
     - python: 3.6
+      dist: xenial
+      sudo: true
     - python: 3.7
       dist: xenial
       sudo: true
 
 install:
+  - pip install Cython==0.29.6 cymem
   - pip install -e .
 script:
   - python setup.py test

MANIFEST.in

@@ -1,7 +1,17 @@
 include README.rst
 include LICENSE
-include fcrepo
-graft ext
+include bin/*
+include ext/lmdb/libraries/liblmdb/mdb.c
+include ext/lmdb/libraries/liblmdb/lmdb.h
+include ext/lmdb/libraries/liblmdb/midl.c
+include ext/lmdb/libraries/liblmdb/midl.h
+include ext/collections-c/src/*.c
+include ext/collections-c/src/include/*.h
+include ext/tpl/src/tpl.c
+include ext/tpl/src/tpl.h
+include ext/spookyhash/src/*.c
+include ext/spookyhash/src/*.h
+
 graft lakesuperior/data/bootstrap
 graft lakesuperior/endpoints/templates
 graft lakesuperior/etc.defaults

README.rst

@@ -3,43 +3,44 @@ Lakesuperior
 
 |build status| |docs| |pypi| |codecov|
 
-Lakesuperior is an alternative `Fedora
-Repository <http://fedorarepository.org>`__ implementation.
+Lakesuperior is a Linked Data repository software. It is capable of storing and
+managing  large volumes of files and their metadata regardless of their
+format, size, ethnicity, gender identity or expression.
 
-Fedora is a mature repository software system historically adopted by
-major cultural heritage institutions. It exposes an
-`LDP <https://www.w3.org/TR/ldp-primer/>`__ endpoint to manage
-any type of binary files and their metadata in Linked Data format.
+Lakesuperior is an alternative `Fedora Repository
+<http://fedorarepository.org>`__ implementation. Fedora is a mature repository
+software system historically adopted by major cultural heritage institutions
+which extends the `Linked Data Platform <https://www.w3.org/TR/ldp-primer/>`__
+protocol.
 
 Guiding Principles
 ------------------
 
-Lakesuperior aims at being an uncomplicated, efficient Fedora 4
-implementation.
+Lakesuperior aims at being a reliable and efficient Fedora 4 implementation.
 
 Its main goals are:
 
 -  **Reliability:** Based on solid technologies with stability in mind.
 -  **Efficiency:** Small memory and CPU footprint, high scalability.
--  **Ease of management:** Tools to perform monitoring and maintenance
-   included.
+-  **Ease of management:** Tools to perform migration, monitoring and
+   maintenance included.
 -  **Simplicity of design:** Straight-forward architecture, robustness
    over features.
 
 Key features
 ------------
 
--  Drop-in replacement for Fedora4
--  Very stable persistence layer based on
-   `LMDB <https://symas.com/lmdb/>`__ and filesystem. Fully
-   ACID-compliant writes guarantee consistency of data.
--  Term-based search and SPARQL Query API + UI
--  No performance penalty for storing many resources under the same
-   container, or having one resource link to many URIs
--  Extensible provenance metadata tracking
--  Multi-modal access: HTTP (REST), command line interface and native Python
-   API.
--  Fits in a pocket: you can carry 50M triples in an 8Gb memory stick.
+- Stores binary files and RDF metadata in one repository.
+- Multi-modal access: REST/LDP, command line and native Python API.
+- (`almost <fcrepo4_deltas>`_) Drop-in replacement for Fedora4
+- Very stable persistence layer based on
+  `LMDB <https://symas.com/lmdb/>`__ and filesystem. Fully
+  ACID-compliant writes guarantee consistency of data.
+- Term-based search and SPARQL Query API + UI
+- No performance penalty for storing many resources under the same
+  container, or having one resource link to many URIs
+- Extensible provenance metadata tracking
+- Fits in a pocket: you can carry 50M triples in an 8Gb memory stick.
 
 Installation & Documentation
 ----------------------------
@@ -50,7 +51,7 @@ With Docker::
     cd lakesuperior
     docker-compose up
 
-With pip (assuming you are familiar with it)::
+With pip (requires a C compiler to be installed)::
 
     pip install lakesuperior
 

docker/docker_entrypoint

@@ -7,4 +7,4 @@ coilmq &
 if [ ! -d /data/ldpnr_store ] && [ ! -d /data/ldprs_store ]; then
   echo yes | lsup-admin bootstrap
 fi
-exec ./fcrepo
+exec fcrepo

docs/api.rst

@@ -10,7 +10,7 @@ The Lakesuperior API modules of most interest for a client are:
 - :mod:`lakesupeiror.api.query`
 - :mod:`lakesuperior.api.admin`
 
-:mod:`lakesuperior.model.ldpr` is used to manipulate resources.
+:mod:`lakesuperior.model.ldp.ldpr` is used to manipulate resources.
 
 The full API docs are listed below.
 

docs/apidoc/lakesuperior.model.rst

@@ -7,7 +7,7 @@ Submodules
 lakesuperior\.model\.ldp\_factory module
 ----------------------------------------
 
-.. automodule:: lakesuperior.model.ldp_factory
+.. automodule:: lakesuperior.model.ldp.ldp_factory
     :members:
     :undoc-members:
     :show-inheritance:
@@ -15,7 +15,7 @@ lakesuperior\.model\.ldp\_factory module
 lakesuperior\.model\.ldp\_nr module
 -----------------------------------
 
-.. automodule:: lakesuperior.model.ldp_nr
+.. automodule:: lakesuperior.model.ldp.ldp_nr
     :members:
     :undoc-members:
     :show-inheritance:
@@ -23,7 +23,7 @@ lakesuperior\.model\.ldp\_nr module
 lakesuperior\.model\.ldp\_rs module
 -----------------------------------
 
-.. automodule:: lakesuperior.model.ldp_rs
+.. automodule:: lakesuperior.model.ldp.ldp_rs
     :members:
     :undoc-members:
     :show-inheritance:
@@ -31,7 +31,7 @@ lakesuperior\.model\.ldp\_rs module
 lakesuperior\.model\.ldpr module
 --------------------------------
 
-.. automodule:: lakesuperior.model.ldpr
+.. automodule:: lakesuperior.model.ldp.ldpr
     :members:
     :undoc-members:
     :show-inheritance:

docs/cli.rst

@@ -39,10 +39,6 @@ available in Windows. Windows users should look for alternative WSGI servers
 to run the single-threaded service (``lsup-server``) over multiple processes
 and/or threads.
 
-**Note:** This is the only command line tool that is not added to the ``PATH``
-environment variable in Unix systems (beecause it is not cross-platform). It
-must be invoked by using its full path.
-
 ``lsup-admin``
 --------------
 

docs/fcrepo4_deltas.rst

@@ -8,10 +8,11 @@ clients will use it.
 Not yet implemented (but in the plans)
 --------------------------------------
 
--  Various headers handling (partial)
--  AuthN/Z
--  Fixity check
--  Blank nodes
+- Various headers handling (partial)
+- AuthN and WebAC-based authZ
+- Fixity check
+- Blank nodes (at least partly working, but untested)
+- Multiple byte ranges for the ``Range`` request header
 
 Potentially breaking changes
 ----------------------------
@@ -62,6 +63,16 @@ regardless of whether the tombstone exists or not.
 Lakesuperior will return ``405`` only if the tombstone actually exists,
 ``404`` otherwise.
 
+``Limit`` Header
+~~~~~~~~~~~~~~~~
+
+Lakesuperior does not support the ``Limit`` header which in FCREPO can be used
+to limit the number of "child" resources displayed for a container graph. Since
+this seems to have a mostly cosmetic function in FCREPO to compensate for
+performance limitations (displaying a page with many thousands of children in
+the UI can take minutes), and since Lakesuperior already offers options in the
+``Prefer`` header to not return any children, this option is not implemented.
+
 Web UI
 ~~~~~~
 

docs/release_notes.rst

@@ -2,6 +2,14 @@
 Release Notes
 =============
 
+1.0 Alpha 19 HOTFIX
+-------------------
+
+*October 10, 2018*
+
+A hotfix release was necessary to adjust settings for the source to build
+correctly on Read The Docs and Docker Hub, and to package correctly on PyPI.
+
 1.0 Alpha 18
 ------------
 

docs/structures.rst

@@ -0,0 +1,99 @@
+Data Structure Internals
+========================
+
+**(Draft)**
+
+Lakesuperior has its own methods for handling in-memory graphs. These methods
+rely on C data structures and are therefore much faster than Python/RDFLib
+objects.
+
+The graph data model modules are in :py:module:`lakesuperior.model.graph`.
+
+The Graph Data Model
+--------------------
+
+Triples are stored in a C hash set. Each triple is represented by a pointer to
+a ``BufferTriple`` structure stored in a temporary memory pool. This pool is
+tied to the life cycle of the ``SimpleGraph`` object it belongs to.
+
+A triple structure contains three pointers to ``Buffer`` structures, which
+contain a serialized version of a RDF term. These structures are stored in the
+``SimpleGraph`` memory pool as well.
+
+Each ``SimpleGraph`` object has a ``_terms`` property and a ``_triples``
+property. These are C hash sets holding addresses of unique terms and
+triples inserted in the graph. If the same term is entered more than once,
+in any position in any triple, the first one entered is used and is pointed to
+by the triple. This makes the graph data structure very compact.
+
+In summary, the pointers can be represented this way::
+
+   <serialized term data in mem pool (x3)>
+         ^      ^      ^
+         |      |      |
+   <Term structures in mem pool (x3)>
+         ^      ^      ^
+         |      |      |
+   <Term struct addresses in _terms set (x3)>
+         ^      ^      ^
+         |      |      |
+   <Triple structure in mem pool>
+         ^
+         |
+   <address of triple in _triples set>
+
+Let's say we insert the following triples in a ``SimpleGraph``::
+
+   <urn:s:0> <urn:p:0> <urn:o:0>
+   <urn:s:0> <urn:p:1> <urn:o:1>
+   <urn:s:0> <urn:p:1> <urn:o:2>
+   <urn:s:0> <urn:p:0> <urn:o:0>
+
+The memory pool contains the following byte arrays  of raw data, displayed in
+the following list with their relative addresses (simplified to 8-bit
+addresses and fixed-length byte strings for readability)::
+
+   0x00     <urn:s:0>
+   0x09     <urn:p:0>
+   0x12     <urn:o:0>
+
+   0x1b     <urn:s:0>
+   0x24     <urn:p:1>
+   0x2d     <urn:o:1>
+
+   0x36     <urn:s:0>
+   0x3f     <urn:p:1>
+   0x48     <urn:o:2>
+
+   0x51     <urn:s:0>
+   0x5a     <urn:p:0>
+   0x63     <urn:o:0>
+
+However, the ``_terms`` set contains only ``Buffer`` structures pointing to
+unique addresses::
+
+   0x00
+   0x09
+   0x12
+   0x24
+   0x2d
+   0x48
+
+The other terms are just unutilized. They will be deallocated en masse when
+the ``SimpleGraph`` object is garbage collected.
+
+The ``_triples`` set would then contain 3 unique entries pointing to the unique
+term addresses::
+
+   0x00  0x09  0x12
+   0x00  0x24  0x2d
+   0x00  0x24  0x48
+
+(the actual addresses would actually belong to the structures pointing to the
+raw data, but this is just an illustrative example).
+
+The advantage of this approach is that the memory pool is contiguous and
+append-only (until it gets purged), so it's cheap to just add to it, while the
+sets that must maintain uniqueness and are the ones that most operations
+(lookup, adding, removing, slicing, copying, etc.) are done on, contain much
+less data and are therefore faster.

ext/collections-c

@@ -0,0 +1 @@
+Subproject commit 719fd8c229b2fb369e9fc175fc97ad658108438c

ext/include/lmdb.h

@@ -1,1604 +0,0 @@
-/** @file lmdb.h
- *	@brief Lightning memory-mapped database library
- *
- *	@mainpage	Lightning Memory-Mapped Database Manager (LMDB)
- *
- *	@section intro_sec Introduction
- *	LMDB is a Btree-based database management library modeled loosely on the
- *	BerkeleyDB API, but much simplified. The entire database is exposed
- *	in a memory map, and all data fetches return data directly
- *	from the mapped memory, so no malloc's or memcpy's occur during
- *	data fetches. As such, the library is extremely simple because it
- *	requires no page caching layer of its own, and it is extremely high
- *	performance and memory-efficient. It is also fully transactional with
- *	full ACID semantics, and when the memory map is read-only, the
- *	database integrity cannot be corrupted by stray pointer writes from
- *	application code.
- *
- *	The library is fully thread-aware and supports concurrent read/write
- *	access from multiple processes and threads. Data pages use a copy-on-
- *	write strategy so no active data pages are ever overwritten, which
- *	also provides resistance to corruption and eliminates the need of any
- *	special recovery procedures after a system crash. Writes are fully
- *	serialized; only one write transaction may be active at a time, which
- *	guarantees that writers can never deadlock. The database structure is
- *	multi-versioned so readers run with no locks; writers cannot block
- *	readers, and readers don't block writers.
- *
- *	Unlike other well-known database mechanisms which use either write-ahead
- *	transaction logs or append-only data writes, LMDB requires no maintenance
- *	during operation. Both write-ahead loggers and append-only databases
- *	require periodic checkpointing and/or compaction of their log or database
- *	files otherwise they grow without bound. LMDB tracks free pages within
- *	the database and re-uses them for new write operations, so the database
- *	size does not grow without bound in normal use.
- *
- *	The memory map can be used as a read-only or read-write map. It is
- *	read-only by default as this provides total immunity to corruption.
- *	Using read-write mode offers much higher write performance, but adds
- *	the possibility for stray application writes thru pointers to silently
- *	corrupt the database. Of course if your application code is known to
- *	be bug-free (...) then this is not an issue.
- *
- *	If this is your first time using a transactional embedded key/value
- *	store, you may find the \ref starting page to be helpful.
- *
- *	@section caveats_sec Caveats
- *	Troubleshooting the lock file, plus semaphores on BSD systems:
- *
- *	- A broken lockfile can cause sync issues.
- *	  Stale reader transactions left behind by an aborted program
- *	  cause further writes to grow the database quickly, and
- *	  stale locks can block further operation.
- *
- *	  Fix: Check for stale readers periodically, using the
- *	  #mdb_reader_check function or the \ref mdb_stat_1 "mdb_stat" tool.
- *	  Stale writers will be cleared automatically on some systems:
- *	  - Windows - automatic
- *	  - Linux, systems using POSIX mutexes with Robust option - automatic
- *	  - not on BSD, systems using POSIX semaphores.
- *	  Otherwise just make all programs using the database close it;
- *	  the lockfile is always reset on first open of the environment.
- *
- *	- On BSD systems or others configured with MDB_USE_POSIX_SEM,
- *	  startup can fail due to semaphores owned by another userid.
- *
- *	  Fix: Open and close the database as the user which owns the
- *	  semaphores (likely last user) or as root, while no other
- *	  process is using the database.
- *
- *	Restrictions/caveats (in addition to those listed for some functions):
- *
- *	- Only the database owner should normally use the database on
- *	  BSD systems or when otherwise configured with MDB_USE_POSIX_SEM.
- *	  Multiple users can cause startup to fail later, as noted above.
- *
- *	- There is normally no pure read-only mode, since readers need write
- *	  access to locks and lock file. Exceptions: On read-only filesystems
- *	  or with the #MDB_NOLOCK flag described under #mdb_env_open().
- *
- *	- An LMDB configuration will often reserve considerable \b unused
- *	  memory address space and maybe file size for future growth.
- *	  This does not use actual memory or disk space, but users may need
- *	  to understand the difference so they won't be scared off.
- *
- *	- By default, in versions before 0.9.10, unused portions of the data
- *	  file might receive garbage data from memory freed by other code.
- *	  (This does not happen when using the #MDB_WRITEMAP flag.) As of
- *	  0.9.10 the default behavior is to initialize such memory before
- *	  writing to the data file. Since there may be a slight performance
- *	  cost due to this initialization, applications may disable it using
- *	  the #MDB_NOMEMINIT flag. Applications handling sensitive data
- *	  which must not be written should not use this flag. This flag is
- *	  irrelevant when using #MDB_WRITEMAP.
- *
- *	- A thread can only use one transaction at a time, plus any child
- *	  transactions.  Each transaction belongs to one thread.  See below.
- *	  The #MDB_NOTLS flag changes this for read-only transactions.
- *
- *	- Use an MDB_env* in the process which opened it, not after fork().
- *
- *	- Do not have open an LMDB database twice in the same process at
- *	  the same time.  Not even from a plain open() call - close()ing it
- *	  breaks fcntl() advisory locking.  (It is OK to reopen it after
- *	  fork() - exec*(), since the lockfile has FD_CLOEXEC set.)
- *
- *	- Avoid long-lived transactions.  Read transactions prevent
- *	  reuse of pages freed by newer write transactions, thus the
- *	  database can grow quickly.  Write transactions prevent
- *	  other write transactions, since writes are serialized.
- *
- *	- Avoid suspending a process with active transactions.  These
- *	  would then be "long-lived" as above.  Also read transactions
- *	  suspended when writers commit could sometimes see wrong data.
- *
- *	...when several processes can use a database concurrently:
- *
- *	- Avoid aborting a process with an active transaction.
- *	  The transaction becomes "long-lived" as above until a check
- *	  for stale readers is performed or the lockfile is reset,
- *	  since the process may not remove it from the lockfile.
- *
- *	  This does not apply to write transactions if the system clears
- *	  stale writers, see above.
- *
- *	- If you do that anyway, do a periodic check for stale readers. Or
- *	  close the environment once in a while, so the lockfile can get reset.
- *
- *	- Do not use LMDB databases on remote filesystems, even between
- *	  processes on the same host.  This breaks flock() on some OSes,
- *	  possibly memory map sync, and certainly sync between programs
- *	  on different hosts.
- *
- *	- Opening a database can fail if another process is opening or
- *	  closing it at exactly the same time.
- *
- *	@author	Howard Chu, Symas Corporation.
- *
- *	@copyright Copyright 2011-2018 Howard Chu, Symas Corp. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted only as authorized by the OpenLDAP
- * Public License.
- *
- * A copy of this license is available in the file LICENSE in the
- * top-level directory of the distribution or, alternatively, at
- * <http://www.OpenLDAP.org/license.html>.
- *
- *	@par Derived From:
- * This code is derived from btree.c written by Martin Hedenfalk.
- *
- * Copyright (c) 2009, 2010 Martin Hedenfalk <martin@bzero.se>
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
-#ifndef _LMDB_H_
-#define _LMDB_H_
-
-#include <sys/types.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/** Unix permissions for creating files, or dummy definition for Windows */
-#ifdef _MSC_VER
-typedef	int	mdb_mode_t;
-#else
-typedef	mode_t	mdb_mode_t;
-#endif
-
-/** An abstraction for a file handle.
- *	On POSIX systems file handles are small integers. On Windows
- *	they're opaque pointers.
- */
-#ifdef _WIN32
-typedef	void *mdb_filehandle_t;
-#else
-typedef int mdb_filehandle_t;
-#endif
-
-/** @defgroup mdb LMDB API
- *	@{
- *	@brief OpenLDAP Lightning Memory-Mapped Database Manager
- */
-/** @defgroup Version Version Macros
- *	@{
- */
-/** Library major version */
-#define MDB_VERSION_MAJOR	0
-/** Library minor version */
-#define MDB_VERSION_MINOR	9
-/** Library patch version */
-#define MDB_VERSION_PATCH	22
-
-/** Combine args a,b,c into a single integer for easy version comparisons */
-#define MDB_VERINT(a,b,c)	(((a) << 24) | ((b) << 16) | (c))
-
-/** The full library version as a single integer */
-#define MDB_VERSION_FULL	\
-	MDB_VERINT(MDB_VERSION_MAJOR,MDB_VERSION_MINOR,MDB_VERSION_PATCH)
-
-/** The release date of this library version */
-#define MDB_VERSION_DATE	"March 21, 2018"
-
-/** A stringifier for the version info */
-#define MDB_VERSTR(a,b,c,d)	"LMDB " #a "." #b "." #c ": (" d ")"
-
-/** A helper for the stringifier macro */
-#define MDB_VERFOO(a,b,c,d)	MDB_VERSTR(a,b,c,d)
-
-/** The full library version as a C string */
-#define	MDB_VERSION_STRING	\
-	MDB_VERFOO(MDB_VERSION_MAJOR,MDB_VERSION_MINOR,MDB_VERSION_PATCH,MDB_VERSION_DATE)
-/**	@} */
-
-/** @brief Opaque structure for a database environment.
- *
- * A DB environment supports multiple databases, all residing in the same
- * shared-memory map.
- */
-typedef struct MDB_env MDB_env;
-
-/** @brief Opaque structure for a transaction handle.
- *
- * All database operations require a transaction handle. Transactions may be
- * read-only or read-write.
- */
-typedef struct MDB_txn MDB_txn;
-
-/** @brief A handle for an individual database in the DB environment. */
-typedef unsigned int	MDB_dbi;
-
-/** @brief Opaque structure for navigating through a database */
-typedef struct MDB_cursor MDB_cursor;
-
-/** @brief Generic structure used for passing keys and data in and out
- * of the database.
- *
- * Values returned from the database are valid only until a subsequent
- * update operation, or the end of the transaction. Do not modify or
- * free them, they commonly point into the database itself.
- *
- * Key sizes must be between 1 and #mdb_env_get_maxkeysize() inclusive.
- * The same applies to data sizes in databases with the #MDB_DUPSORT flag.
- * Other data items can in theory be from 0 to 0xffffffff bytes long.
- */
-typedef struct MDB_val {
-	size_t		 mv_size;	/**< size of the data item */
-	void		*mv_data;	/**< address of the data item */
-} MDB_val;
-
-/** @brief A callback function used to compare two keys in a database */
-typedef int  (MDB_cmp_func)(const MDB_val *a, const MDB_val *b);
-
-/** @brief A callback function used to relocate a position-dependent data item
- * in a fixed-address database.
- *
- * The \b newptr gives the item's desired address in
- * the memory map, and \b oldptr gives its previous address. The item's actual
- * data resides at the address in \b item.  This callback is expected to walk
- * through the fields of the record in \b item and modify any
- * values based at the \b oldptr address to be relative to the \b newptr address.
- * @param[in,out] item The item that is to be relocated.
- * @param[in] oldptr The previous address.
- * @param[in] newptr The new address to relocate to.
- * @param[in] relctx An application-provided context, set by #mdb_set_relctx().
- * @todo This feature is currently unimplemented.
- */
-typedef void (MDB_rel_func)(MDB_val *item, void *oldptr, void *newptr, void *relctx);
-
-/** @defgroup	mdb_env	Environment Flags
- *	@{
- */
-	/** mmap at a fixed address (experimental) */
-#define MDB_FIXEDMAP	0x01
-	/** no environment directory */
-#define MDB_NOSUBDIR	0x4000
-	/** don't fsync after commit */
-#define MDB_NOSYNC		0x10000
-	/** read only */
-#define MDB_RDONLY		0x20000
-	/** don't fsync metapage after commit */
-#define MDB_NOMETASYNC		0x40000
-	/** use writable mmap */
-#define MDB_WRITEMAP		0x80000
-	/** use asynchronous msync when #MDB_WRITEMAP is used */
-#define MDB_MAPASYNC		0x100000
-	/** tie reader locktable slots to #MDB_txn objects instead of to threads */
-#define MDB_NOTLS		0x200000
-	/** don't do any locking, caller must manage their own locks */
-#define MDB_NOLOCK		0x400000
-	/** don't do readahead (no effect on Windows) */
-#define MDB_NORDAHEAD	0x800000
-	/** don't initialize malloc'd memory before writing to datafile */
-#define MDB_NOMEMINIT	0x1000000
-/** @} */
-
-/**	@defgroup	mdb_dbi_open	Database Flags
- *	@{
- */
-	/** use reverse string keys */
-#define MDB_REVERSEKEY	0x02
-	/** use sorted duplicates */
-#define MDB_DUPSORT		0x04
-	/** numeric keys in native byte order: either unsigned int or size_t.
-	 *  The keys must all be of the same size. */
-#define MDB_INTEGERKEY	0x08
-	/** with #MDB_DUPSORT, sorted dup items have fixed size */
-#define MDB_DUPFIXED	0x10
-	/** with #MDB_DUPSORT, dups are #MDB_INTEGERKEY-style integers */
-#define MDB_INTEGERDUP	0x20
-	/** with #MDB_DUPSORT, use reverse string dups */
-#define MDB_REVERSEDUP	0x40
-	/** create DB if not already existing */
-#define MDB_CREATE		0x40000
-/** @} */
-
-/**	@defgroup mdb_put	Write Flags
- *	@{
- */
-/** For put: Don't write if the key already exists. */
-#define MDB_NOOVERWRITE	0x10
-/** Only for #MDB_DUPSORT<br>
- * For put: don't write if the key and data pair already exist.<br>
- * For mdb_cursor_del: remove all duplicate data items.
- */
-#define MDB_NODUPDATA	0x20
-/** For mdb_cursor_put: overwrite the current key/data pair */
-#define MDB_CURRENT	0x40
-/** For put: Just reserve space for data, don't copy it. Return a
- * pointer to the reserved space.
- */
-#define MDB_RESERVE	0x10000
-/** Data is being appended, don't split full pages. */
-#define MDB_APPEND	0x20000
-/** Duplicate data is being appended, don't split full pages. */
-#define MDB_APPENDDUP	0x40000
-/** Store multiple data items in one call. Only for #MDB_DUPFIXED. */
-#define MDB_MULTIPLE	0x80000
-/*	@} */
-
-/**	@defgroup mdb_copy	Copy Flags
- *	@{
- */
-/** Compacting copy: Omit free space from copy, and renumber all
- * pages sequentially.
- */
-#define MDB_CP_COMPACT	0x01
-/*	@} */
-
-/** @brief Cursor Get operations.
- *
- *	This is the set of all operations for retrieving data
- *	using a cursor.
- */
-typedef enum MDB_cursor_op {
-	MDB_FIRST,				/**< Position at first key/data item */
-	MDB_FIRST_DUP,			/**< Position at first data item of current key.
-								Only for #MDB_DUPSORT */
-	MDB_GET_BOTH,			/**< Position at key/data pair. Only for #MDB_DUPSORT */
-	MDB_GET_BOTH_RANGE,		/**< position at key, nearest data. Only for #MDB_DUPSORT */
-	MDB_GET_CURRENT,		/**< Return key/data at current cursor position */
-	MDB_GET_MULTIPLE,		/**< Return key and up to a page of duplicate data items
-								from current cursor position. Move cursor to prepare
-								for #MDB_NEXT_MULTIPLE. Only for #MDB_DUPFIXED */
-	MDB_LAST,				/**< Position at last key/data item */
-	MDB_LAST_DUP,			/**< Position at last data item of current key.
-								Only for #MDB_DUPSORT */
-	MDB_NEXT,				/**< Position at next data item */
-	MDB_NEXT_DUP,			/**< Position at next data item of current key.
-								Only for #MDB_DUPSORT */
-	MDB_NEXT_MULTIPLE,		/**< Return key and up to a page of duplicate data items
-								from next cursor position. Move cursor to prepare
-								for #MDB_NEXT_MULTIPLE. Only for #MDB_DUPFIXED */
-	MDB_NEXT_NODUP,			/**< Position at first data item of next key */
-	MDB_PREV,				/**< Position at previous data item */
-	MDB_PREV_DUP,			/**< Position at previous data item of current key.
-								Only for #MDB_DUPSORT */
-	MDB_PREV_NODUP,			/**< Position at last data item of previous key */
-	MDB_SET,				/**< Position at specified key */
-	MDB_SET_KEY,			/**< Position at specified key, return key + data */
-	MDB_SET_RANGE,			/**< Position at first key greater than or equal to specified key. */
-	MDB_PREV_MULTIPLE		/**< Position at previous page and return key and up to
-								a page of duplicate data items. Only for #MDB_DUPFIXED */
-} MDB_cursor_op;
-
-/** @defgroup  errors	Return Codes
- *
- *	BerkeleyDB uses -30800 to -30999, we'll go under them
- *	@{
- */
-	/**	Successful result */
-#define MDB_SUCCESS	 0
-	/** key/data pair already exists */
-#define MDB_KEYEXIST	(-30799)
-	/** key/data pair not found (EOF) */
-#define MDB_NOTFOUND	(-30798)
-	/** Requested page not found - this usually indicates corruption */
-#define MDB_PAGE_NOTFOUND	(-30797)
-	/** Located page was wrong type */
-#define MDB_CORRUPTED	(-30796)
-	/** Update of meta page failed or environment had fatal error */
-#define MDB_PANIC		(-30795)
-	/** Environment version mismatch */
-#define MDB_VERSION_MISMATCH	(-30794)
-	/** File is not a valid LMDB file */
-#define MDB_INVALID	(-30793)
-	/** Environment mapsize reached */
-#define MDB_MAP_FULL	(-30792)
-	/** Environment maxdbs reached */
-#define MDB_DBS_FULL	(-30791)
-	/** Environment maxreaders reached */
-#define MDB_READERS_FULL	(-30790)
-	/** Too many TLS keys in use - Windows only */
-#define MDB_TLS_FULL	(-30789)
-	/** Txn has too many dirty pages */
-#define MDB_TXN_FULL	(-30788)
-	/** Cursor stack too deep - internal error */
-#define MDB_CURSOR_FULL	(-30787)
-	/** Page has not enough space - internal error */
-#define MDB_PAGE_FULL	(-30786)
-	/** Database contents grew beyond environment mapsize */
-#define MDB_MAP_RESIZED	(-30785)
-	/** Operation and DB incompatible, or DB type changed. This can mean:
-	 *	<ul>
-	 *	<li>The operation expects an #MDB_DUPSORT / #MDB_DUPFIXED database.
-	 *	<li>Opening a named DB when the unnamed DB has #MDB_DUPSORT / #MDB_INTEGERKEY.
-	 *	<li>Accessing a data record as a database, or vice versa.
-	 *	<li>The database was dropped and recreated with different flags.
-	 *	</ul>
-	 */
-#define MDB_INCOMPATIBLE	(-30784)
-	/** Invalid reuse of reader locktable slot */
-#define MDB_BAD_RSLOT		(-30783)
-	/** Transaction must abort, has a child, or is invalid */
-#define MDB_BAD_TXN			(-30782)
-	/** Unsupported size of key/DB name/data, or wrong DUPFIXED size */
-#define MDB_BAD_VALSIZE		(-30781)
-	/** The specified DBI was changed unexpectedly */
-#define MDB_BAD_DBI		(-30780)
-	/** The last defined error code */
-#define MDB_LAST_ERRCODE	MDB_BAD_DBI
-/** @} */
-
-/** @brief Statistics for a database in the environment */
-typedef struct MDB_stat {
-	unsigned int	ms_psize;			/**< Size of a database page.
-											This is currently the same for all databases. */
-	unsigned int	ms_depth;			/**< Depth (height) of the B-tree */
-	size_t		ms_branch_pages;	/**< Number of internal (non-leaf) pages */
-	size_t		ms_leaf_pages;		/**< Number of leaf pages */
-	size_t		ms_overflow_pages;	/**< Number of overflow pages */
-	size_t		ms_entries;			/**< Number of data items */
-} MDB_stat;
-
-/** @brief Information about the environment */
-typedef struct MDB_envinfo {
-	void	*me_mapaddr;			/**< Address of map, if fixed */
-	size_t	me_mapsize;				/**< Size of the data memory map */
-	size_t	me_last_pgno;			/**< ID of the last used page */
-	size_t	me_last_txnid;			/**< ID of the last committed transaction */
-	unsigned int me_maxreaders;		/**< max reader slots in the environment */
-	unsigned int me_numreaders;		/**< max reader slots used in the environment */
-} MDB_envinfo;
-
-	/** @brief Return the LMDB library version information.
-	 *
-	 * @param[out] major if non-NULL, the library major version number is copied here
-	 * @param[out] minor if non-NULL, the library minor version number is copied here
-	 * @param[out] patch if non-NULL, the library patch version number is copied here
-	 * @retval "version string" The library version as a string
-	 */
-char *mdb_version(int *major, int *minor, int *patch);
-
-	/** @brief Return a string describing a given error code.
-	 *
-	 * This function is a superset of the ANSI C X3.159-1989 (ANSI C) strerror(3)
-	 * function. If the error code is greater than or equal to 0, then the string
-	 * returned by the system function strerror(3) is returned. If the error code
-	 * is less than 0, an error string corresponding to the LMDB library error is
-	 * returned. See @ref errors for a list of LMDB-specific error codes.
-	 * @param[in] err The error code
-	 * @retval "error message" The description of the error
-	 */
-char *mdb_strerror(int err);
-
-	/** @brief Create an LMDB environment handle.
-	 *
-	 * This function allocates memory for a #MDB_env structure. To release
-	 * the allocated memory and discard the handle, call #mdb_env_close().
-	 * Before the handle may be used, it must be opened using #mdb_env_open().
-	 * Various other options may also need to be set before opening the handle,
-	 * e.g. #mdb_env_set_mapsize(), #mdb_env_set_maxreaders(), #mdb_env_set_maxdbs(),
-	 * depending on usage requirements.
-	 * @param[out] env The address where the new handle will be stored
-	 * @return A non-zero error value on failure and 0 on success.
-	 */
-int  mdb_env_create(MDB_env **env);
-
-	/** @brief Open an environment handle.
-	 *
-	 * If this function fails, #mdb_env_close() must be called to discard the #MDB_env handle.
-	 * @param[in] env An environment handle returned by #mdb_env_create()
-	 * @param[in] path The directory in which the database files reside. This
-	 * directory must already exist and be writable.
-	 * @param[in] flags Special options for this environment. This parameter
-	 * must be set to 0 or by bitwise OR'ing together one or more of the
-	 * values described here.
-	 * Flags set by mdb_env_set_flags() are also used.
-	 * <ul>
-	 *	<li>#MDB_FIXEDMAP
-	 *      use a fixed address for the mmap region. This flag must be specified
-	 *      when creating the environment, and is stored persistently in the environment.
-	 *		If successful, the memory map will always reside at the same virtual address
-	 *		and pointers used to reference data items in the database will be constant
-	 *		across multiple invocations. This option may not always work, depending on
-	 *		how the operating system has allocated memory to shared libraries and other uses.
-	 *		The feature is highly experimental.
-	 *	<li>#MDB_NOSUBDIR
-	 *		By default, LMDB creates its environment in a directory whose
-	 *		pathname is given in \b path, and creates its data and lock files
-	 *		under that directory. With this option, \b path is used as-is for
-	 *		the database main data file. The database lock file is the \b path
-	 *		with "-lock" appended.
-	 *	<li>#MDB_RDONLY
-	 *		Open the environment in read-only mode. No write operations will be
-	 *		allowed. LMDB will still modify the lock file - except on read-only
-	 *		filesystems, where LMDB does not use locks.
-	 *	<li>#MDB_WRITEMAP
-	 *		Use a writeable memory map unless MDB_RDONLY is set. This uses
-	 *		fewer mallocs but loses protection from application bugs
-	 *		like wild pointer writes and other bad updates into the database.
-	 *		This may be slightly faster for DBs that fit entirely in RAM, but
-	 *		is slower for DBs larger than RAM.
-	 *		Incompatible with nested transactions.
-	 *		Do not mix processes with and without MDB_WRITEMAP on the same
-	 *		environment.  This can defeat durability (#mdb_env_sync etc).
-	 *	<li>#MDB_NOMETASYNC
-	 *		Flush system buffers to disk only once per transaction, omit the
-	 *		metadata flush. Defer that until the system flushes files to disk,
-	 *		or next non-MDB_RDONLY commit or #mdb_env_sync(). This optimization
-	 *		maintains database integrity, but a system crash may undo the last
-	 *		committed transaction. I.e. it preserves the ACI (atomicity,
-	 *		consistency, isolation) but not D (durability) database property.
-	 *		This flag may be changed at any time using #mdb_env_set_flags().
-	 *	<li>#MDB_NOSYNC
-	 *		Don't flush system buffers to disk when committing a transaction.
-	 *		This optimization means a system crash can corrupt the database or
-	 *		lose the last transactions if buffers are not yet flushed to disk.
-	 *		The risk is governed by how often the system flushes dirty buffers
-	 *		to disk and how often #mdb_env_sync() is called.  However, if the
-	 *		filesystem preserves write order and the #MDB_WRITEMAP flag is not
-	 *		used, transactions exhibit ACI (atomicity, consistency, isolation)
-	 *		properties and only lose D (durability).  I.e. database integrity
-	 *		is maintained, but a system crash may undo the final transactions.
-	 *		Note that (#MDB_NOSYNC | #MDB_WRITEMAP) leaves the system with no
-	 *		hint for when to write transactions to disk, unless #mdb_env_sync()
-	 *		is called. (#MDB_MAPASYNC | #MDB_WRITEMAP) may be preferable.
-	 *		This flag may be changed at any time using #mdb_env_set_flags().
-	 *	<li>#MDB_MAPASYNC
-	 *		When using #MDB_WRITEMAP, use asynchronous flushes to disk.
-	 *		As with #MDB_NOSYNC, a system crash can then corrupt the
-	 *		database or lose the last transactions. Calling #mdb_env_sync()
-	 *		ensures on-disk database integrity until next commit.
-	 *		This flag may be changed at any time using #mdb_env_set_flags().
-	 *	<li>#MDB_NOTLS
-	 *		Don't use Thread-Local Storage. Tie reader locktable slots to
-	 *		#MDB_txn objects instead of to threads. I.e. #mdb_txn_reset() keeps
-	 *		the slot reseved for the #MDB_txn object. A thread may use parallel
-	 *		read-only transactions. A read-only transaction may span threads if
-	 *		the user synchronizes its use. Applications that multiplex many
-	 *		user threads over individual OS threads need this option. Such an
-	 *		application must also serialize the write transactions in an OS
-	 *		thread, since LMDB's write locking is unaware of the user threads.
-	 *	<li>#MDB_NOLOCK
-	 *		Don't do any locking. If concurrent access is anticipated, the
-	 *		caller must manage all concurrency itself. For proper operation
-	 *		the caller must enforce single-writer semantics, and must ensure
-	 *		that no readers are using old transactions while a writer is
-	 *		active. The simplest approach is to use an exclusive lock so that
-	 *		no readers may be active at all when a writer begins.
-	 *	<li>#MDB_NORDAHEAD
-	 *		Turn off readahead. Most operating systems perform readahead on
-	 *		read requests by default. This option turns it off if the OS
-	 *		supports it. Turning it off may help random read performance
-	 *		when the DB is larger than RAM and system RAM is full.
-	 *		The option is not implemented on Windows.
-	 *	<li>#MDB_NOMEMINIT
-	 *		Don't initialize malloc'd memory before writing to unused spaces
-	 *		in the data file. By default, memory for pages written to the data
-	 *		file is obtained using malloc. While these pages may be reused in
-	 *		subsequent transactions, freshly malloc'd pages will be initialized
-	 *		to zeroes before use. This avoids persisting leftover data from other
-	 *		code (that used the heap and subsequently freed the memory) into the
-	 *		data file. Note that many other system libraries may allocate
-	 *		and free memory from the heap for arbitrary uses. E.g., stdio may
-	 *		use the heap for file I/O buffers. This initialization step has a
-	 *		modest performance cost so some applications may want to disable
-	 *		it using this flag. This option can be a problem for applications
-	 *		which handle sensitive data like passwords, and it makes memory
-	 *		checkers like Valgrind noisy. This flag is not needed with #MDB_WRITEMAP,
-	 *		which writes directly to the mmap instead of using malloc for pages. The
-	 *		initialization is also skipped if #MDB_RESERVE is used; the
-	 *		caller is expected to overwrite all of the memory that was
-	 *		reserved in that case.
-	 *		This flag may be changed at any time using #mdb_env_set_flags().
-	 * </ul>
-	 * @param[in] mode The UNIX permissions to set on created files and semaphores.
-	 * This parameter is ignored on Windows.
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>#MDB_VERSION_MISMATCH - the version of the LMDB library doesn't match the
-	 *	version that created the database environment.
-	 *	<li>#MDB_INVALID - the environment file headers are corrupted.
-	 *	<li>ENOENT - the directory specified by the path parameter doesn't exist.
-	 *	<li>EACCES - the user didn't have permission to access the environment files.
-	 *	<li>EAGAIN - the environment was locked by another process.
-	 * </ul>
-	 */
-int  mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mdb_mode_t mode);
-
-	/** @brief Copy an LMDB environment to the specified path.
-	 *
-	 * This function may be used to make a backup of an existing environment.
-	 * No lockfile is created, since it gets recreated at need.
-	 * @note This call can trigger significant file size growth if run in
-	 * parallel with write transactions, because it employs a read-only
-	 * transaction. See long-lived transactions under @ref caveats_sec.
-	 * @param[in] env An environment handle returned by #mdb_env_create(). It
-	 * must have already been opened successfully.
-	 * @param[in] path The directory in which the copy will reside. This
-	 * directory must already exist and be writable but must otherwise be
-	 * empty.
-	 * @return A non-zero error value on failure and 0 on success.
-	 */
-int  mdb_env_copy(MDB_env *env, const char *path);
-
-	/** @brief Copy an LMDB environment to the specified file descriptor.
-	 *
-	 * This function may be used to make a backup of an existing environment.
-	 * No lockfile is created, since it gets recreated at need.
-	 * @note This call can trigger significant file size growth if run in
-	 * parallel with write transactions, because it employs a read-only
-	 * transaction. See long-lived transactions under @ref caveats_sec.
-	 * @param[in] env An environment handle returned by #mdb_env_create(). It
-	 * must have already been opened successfully.
-	 * @param[in] fd The filedescriptor to write the copy to. It must
-	 * have already been opened for Write access.
-	 * @return A non-zero error value on failure and 0 on success.
-	 */
-int  mdb_env_copyfd(MDB_env *env, mdb_filehandle_t fd);
-
-	/** @brief Copy an LMDB environment to the specified path, with options.
-	 *
-	 * This function may be used to make a backup of an existing environment.
-	 * No lockfile is created, since it gets recreated at need.
-	 * @note This call can trigger significant file size growth if run in
-	 * parallel with write transactions, because it employs a read-only
-	 * transaction. See long-lived transactions under @ref caveats_sec.
-	 * @param[in] env An environment handle returned by #mdb_env_create(). It
-	 * must have already been opened successfully.
-	 * @param[in] path The directory in which the copy will reside. This
-	 * directory must already exist and be writable but must otherwise be
-	 * empty.
-	 * @param[in] flags Special options for this operation. This parameter
-	 * must be set to 0 or by bitwise OR'ing together one or more of the
-	 * values described here.
-	 * <ul>
-	 *	<li>#MDB_CP_COMPACT - Perform compaction while copying: omit free
-	 *		pages and sequentially renumber all pages in output. This option
-	 *		consumes more CPU and runs more slowly than the default.
-	 *		Currently it fails if the environment has suffered a page leak.
-	 * </ul>
-	 * @return A non-zero error value on failure and 0 on success.
-	 */
-int  mdb_env_copy2(MDB_env *env, const char *path, unsigned int flags);
-
-	/** @brief Copy an LMDB environment to the specified file descriptor,
-	 *	with options.
-	 *
-	 * This function may be used to make a backup of an existing environment.
-	 * No lockfile is created, since it gets recreated at need. See
-	 * #mdb_env_copy2() for further details.
-	 * @note This call can trigger significant file size growth if run in
-	 * parallel with write transactions, because it employs a read-only
-	 * transaction. See long-lived transactions under @ref caveats_sec.
-	 * @param[in] env An environment handle returned by #mdb_env_create(). It
-	 * must have already been opened successfully.
-	 * @param[in] fd The filedescriptor to write the copy to. It must
-	 * have already been opened for Write access.
-	 * @param[in] flags Special options for this operation.
-	 * See #mdb_env_copy2() for options.
-	 * @return A non-zero error value on failure and 0 on success.
-	 */
-int  mdb_env_copyfd2(MDB_env *env, mdb_filehandle_t fd, unsigned int flags);
-
-	/** @brief Return statistics about the LMDB environment.
-	 *
-	 * @param[in] env An environment handle returned by #mdb_env_create()
-	 * @param[out] stat The address of an #MDB_stat structure
-	 * 	where the statistics will be copied
-	 */
-int  mdb_env_stat(MDB_env *env, MDB_stat *stat);
-
-	/** @brief Return information about the LMDB environment.
-	 *
-	 * @param[in] env An environment handle returned by #mdb_env_create()
-	 * @param[out] stat The address of an #MDB_envinfo structure
-	 * 	where the information will be copied
-	 */
-int  mdb_env_info(MDB_env *env, MDB_envinfo *stat);
-
-	/** @brief Flush the data buffers to disk.
-	 *
-	 * Data is always written to disk when #mdb_txn_commit() is called,
-	 * but the operating system may keep it buffered. LMDB always flushes
-	 * the OS buffers upon commit as well, unless the environment was
-	 * opened with #MDB_NOSYNC or in part #MDB_NOMETASYNC. This call is
-	 * not valid if the environment was opened with #MDB_RDONLY.
-	 * @param[in] env An environment handle returned by #mdb_env_create()
-	 * @param[in] force If non-zero, force a synchronous flush.  Otherwise
-	 *  if the environment has the #MDB_NOSYNC flag set the flushes
-	 *	will be omitted, and with #MDB_MAPASYNC they will be asynchronous.
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>EACCES - the environment is read-only.
-	 *	<li>EINVAL - an invalid parameter was specified.
-	 *	<li>EIO - an error occurred during synchronization.
-	 * </ul>
-	 */
-int  mdb_env_sync(MDB_env *env, int force);
-
-	/** @brief Close the environment and release the memory map.
-	 *
-	 * Only a single thread may call this function. All transactions, databases,
-	 * and cursors must already be closed before calling this function. Attempts to
-	 * use any such handles after calling this function will cause a SIGSEGV.
-	 * The environment handle will be freed and must not be used again after this call.
-	 * @param[in] env An environment handle returned by #mdb_env_create()
-	 */
-void mdb_env_close(MDB_env *env);
-
-	/** @brief Set environment flags.
-	 *
-	 * This may be used to set some flags in addition to those from
-	 * #mdb_env_open(), or to unset these flags.  If several threads
-	 * change the flags at the same time, the result is undefined.
-	 * @param[in] env An environment handle returned by #mdb_env_create()
-	 * @param[in] flags The flags to change, bitwise OR'ed together
-	 * @param[in] onoff A non-zero value sets the flags, zero clears them.
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>EINVAL - an invalid parameter was specified.
-	 * </ul>
-	 */
-int  mdb_env_set_flags(MDB_env *env, unsigned int flags, int onoff);
-
-	/** @brief Get environment flags.
-	 *
-	 * @param[in] env An environment handle returned by #mdb_env_create()
-	 * @param[out] flags The address of an integer to store the flags
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>EINVAL - an invalid parameter was specified.
-	 * </ul>
-	 */
-int  mdb_env_get_flags(MDB_env *env, unsigned int *flags);
-
-	/** @brief Return the path that was used in #mdb_env_open().
-	 *
-	 * @param[in] env An environment handle returned by #mdb_env_create()
-	 * @param[out] path Address of a string pointer to contain the path. This
-	 * is the actual string in the environment, not a copy. It should not be
-	 * altered in any way.
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>EINVAL - an invalid parameter was specified.
-	 * </ul>
-	 */
-int  mdb_env_get_path(MDB_env *env, const char **path);
-
-	/** @brief Return the filedescriptor for the given environment.
-	 *
-	 * This function may be called after fork(), so the descriptor can be
-	 * closed before exec*().  Other LMDB file descriptors have FD_CLOEXEC.
-	 * (Until LMDB 0.9.18, only the lockfile had that.)
-	 *
-	 * @param[in] env An environment handle returned by #mdb_env_create()
-	 * @param[out] fd Address of a mdb_filehandle_t to contain the descriptor.
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>EINVAL - an invalid parameter was specified.
-	 * </ul>
-	 */
-int  mdb_env_get_fd(MDB_env *env, mdb_filehandle_t *fd);
-
-	/** @brief Set the size of the memory map to use for this environment.
-	 *
-	 * The size should be a multiple of the OS page size. The default is
-	 * 10485760 bytes. The size of the memory map is also the maximum size
-	 * of the database. The value should be chosen as large as possible,
-	 * to accommodate future growth of the database.
-	 * This function should be called after #mdb_env_create() and before #mdb_env_open().
-	 * It may be called at later times if no transactions are active in
-	 * this process. Note that the library does not check for this condition,
-	 * the caller must ensure it explicitly.
-	 *
-	 * The new size takes effect immediately for the current process but
-	 * will not be persisted to any others until a write transaction has been
-	 * committed by the current process. Also, only mapsize increases are
-	 * persisted into the environment.
-	 *
-	 * If the mapsize is increased by another process, and data has grown
-	 * beyond the range of the current mapsize, #mdb_txn_begin() will
-	 * return #MDB_MAP_RESIZED. This function may be called with a size
-	 * of zero to adopt the new size.
-	 *
-	 * Any attempt to set a size smaller than the space already consumed
-	 * by the environment will be silently changed to the current size of the used space.
-	 * @param[in] env An environment handle returned by #mdb_env_create()
-	 * @param[in] size The size in bytes
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>EINVAL - an invalid parameter was specified, or the environment has
-	 *   	an active write transaction.
-	 * </ul>
-	 */
-int  mdb_env_set_mapsize(MDB_env *env, size_t size);
-
-	/** @brief Set the maximum number of threads/reader slots for the environment.
-	 *
-	 * This defines the number of slots in the lock table that is used to track readers in the
-	 * the environment. The default is 126.
-	 * Starting a read-only transaction normally ties a lock table slot to the
-	 * current thread until the environment closes or the thread exits. If
-	 * MDB_NOTLS is in use, #mdb_txn_begin() instead ties the slot to the
-	 * MDB_txn object until it or the #MDB_env object is destroyed.
-	 * This function may only be called after #mdb_env_create() and before #mdb_env_open().
-	 * @param[in] env An environment handle returned by #mdb_env_create()
-	 * @param[in] readers The maximum number of reader lock table slots
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>EINVAL - an invalid parameter was specified, or the environment is already open.
-	 * </ul>
-	 */
-int  mdb_env_set_maxreaders(MDB_env *env, unsigned int readers);
-
-	/** @brief Get the maximum number of threads/reader slots for the environment.
-	 *
-	 * @param[in] env An environment handle returned by #mdb_env_create()
-	 * @param[out] readers Address of an integer to store the number of readers
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>EINVAL - an invalid parameter was specified.
-	 * </ul>
-	 */
-int  mdb_env_get_maxreaders(MDB_env *env, unsigned int *readers);
-
-	/** @brief Set the maximum number of named databases for the environment.
-	 *
-	 * This function is only needed if multiple databases will be used in the
-	 * environment. Simpler applications that use the environment as a single
-	 * unnamed database can ignore this option.
-	 * This function may only be called after #mdb_env_create() and before #mdb_env_open().
-	 *
-	 * Currently a moderate number of slots are cheap but a huge number gets
-	 * expensive: 7-120 words per transaction, and every #mdb_dbi_open()
-	 * does a linear search of the opened slots.
-	 * @param[in] env An environment handle returned by #mdb_env_create()
-	 * @param[in] dbs The maximum number of databases
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>EINVAL - an invalid parameter was specified, or the environment is already open.
-	 * </ul>
-	 */
-int  mdb_env_set_maxdbs(MDB_env *env, MDB_dbi dbs);
-
-	/** @brief Get the maximum size of keys and #MDB_DUPSORT data we can write.
-	 *
-	 * Depends on the compile-time constant #MDB_MAXKEYSIZE. Default 511.
-	 * See @ref MDB_val.
-	 * @param[in] env An environment handle returned by #mdb_env_create()
-	 * @return The maximum size of a key we can write
-	 */
-int  mdb_env_get_maxkeysize(MDB_env *env);
-
-	/** @brief Set application information associated with the #MDB_env.
-	 *
-	 * @param[in] env An environment handle returned by #mdb_env_create()
-	 * @param[in] ctx An arbitrary pointer for whatever the application needs.
-	 * @return A non-zero error value on failure and 0 on success.
-	 */
-int  mdb_env_set_userctx(MDB_env *env, void *ctx);
-
-	/** @brief Get the application information associated with the #MDB_env.
-	 *
-	 * @param[in] env An environment handle returned by #mdb_env_create()
-	 * @return The pointer set by #mdb_env_set_userctx().
-	 */
-void *mdb_env_get_userctx(MDB_env *env);
-
-	/** @brief A callback function for most LMDB assert() failures,
-	 * called before printing the message and aborting.
-	 *
-	 * @param[in] env An environment handle returned by #mdb_env_create().
-	 * @param[in] msg The assertion message, not including newline.
-	 */
-typedef void MDB_assert_func(MDB_env *env, const char *msg);
-
-	/** Set or reset the assert() callback of the environment.
-	 * Disabled if liblmdb is buillt with NDEBUG.
-	 * @note This hack should become obsolete as lmdb's error handling matures.
-	 * @param[in] env An environment handle returned by #mdb_env_create().
-	 * @param[in] func An #MDB_assert_func function, or 0.
-	 * @return A non-zero error value on failure and 0 on success.
-	 */
-int  mdb_env_set_assert(MDB_env *env, MDB_assert_func *func);
-
-	/** @brief Create a transaction for use with the environment.
-	 *
-	 * The transaction handle may be discarded using #mdb_txn_abort() or #mdb_txn_commit().
-	 * @note A transaction and its cursors must only be used by a single
-	 * thread, and a thread may only have a single transaction at a time.
-	 * If #MDB_NOTLS is in use, this does not apply to read-only transactions.
-	 * @note Cursors may not span transactions.
-	 * @param[in] env An environment handle returned by #mdb_env_create()
-	 * @param[in] parent If this parameter is non-NULL, the new transaction
-	 * will be a nested transaction, with the transaction indicated by \b parent
-	 * as its parent. Transactions may be nested to any level. A parent
-	 * transaction and its cursors may not issue any other operations than
-	 * mdb_txn_commit and mdb_txn_abort while it has active child transactions.
-	 * @param[in] flags Special options for this transaction. This parameter
-	 * must be set to 0 or by bitwise OR'ing together one or more of the
-	 * values described here.
-	 * <ul>
-	 *	<li>#MDB_RDONLY
-	 *		This transaction will not perform any write operations.
-	 * </ul>
-	 * @param[out] txn Address where the new #MDB_txn handle will be stored
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>#MDB_PANIC - a fatal error occurred earlier and the environment
-	 *		must be shut down.
-	 *	<li>#MDB_MAP_RESIZED - another process wrote data beyond this MDB_env's
-	 *		mapsize and this environment's map must be resized as well.
-	 *		See #mdb_env_set_mapsize().
-	 *	<li>#MDB_READERS_FULL - a read-only transaction was requested and
-	 *		the reader lock table is full. See #mdb_env_set_maxreaders().
-	 *	<li>ENOMEM - out of memory.
-	 * </ul>
-	 */
-int  mdb_txn_begin(MDB_env *env, MDB_txn *parent, unsigned int flags, MDB_txn **txn);
-
-	/** @brief Returns the transaction's #MDB_env
-	 *
-	 * @param[in] txn A transaction handle returned by #mdb_txn_begin()
-	 */
-MDB_env *mdb_txn_env(MDB_txn *txn);
-
-	/** @brief Return the transaction's ID.
-	 *
-	 * This returns the identifier associated with this transaction. For a
-	 * read-only transaction, this corresponds to the snapshot being read;
-	 * concurrent readers will frequently have the same transaction ID.
-	 *
-	 * @param[in] txn A transaction handle returned by #mdb_txn_begin()
-	 * @return A transaction ID, valid if input is an active transaction.
-	 */
-size_t mdb_txn_id(MDB_txn *txn);
-
-	/** @brief Commit all the operations of a transaction into the database.
-	 *
-	 * The transaction handle is freed. It and its cursors must not be used
-	 * again after this call, except with #mdb_cursor_renew().
-	 * @note Earlier documentation incorrectly said all cursors would be freed.
-	 * Only write-transactions free cursors.
-	 * @param[in] txn A transaction handle returned by #mdb_txn_begin()
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>EINVAL - an invalid parameter was specified.
-	 *	<li>ENOSPC - no more disk space.
-	 *	<li>EIO - a low-level I/O error occurred while writing.
-	 *	<li>ENOMEM - out of memory.
-	 * </ul>
-	 */
-int  mdb_txn_commit(MDB_txn *txn);
-
-	/** @brief Abandon all the operations of the transaction instead of saving them.
-	 *
-	 * The transaction handle is freed. It and its cursors must not be used
-	 * again after this call, except with #mdb_cursor_renew().
-	 * @note Earlier documentation incorrectly said all cursors would be freed.
-	 * Only write-transactions free cursors.
-	 * @param[in] txn A transaction handle returned by #mdb_txn_begin()
-	 */
-void mdb_txn_abort(MDB_txn *txn);
-
-	/** @brief Reset a read-only transaction.
-	 *
-	 * Abort the transaction like #mdb_txn_abort(), but keep the transaction
-	 * handle. #mdb_txn_renew() may reuse the handle. This saves allocation
-	 * overhead if the process will start a new read-only transaction soon,
-	 * and also locking overhead if #MDB_NOTLS is in use. The reader table
-	 * lock is released, but the table slot stays tied to its thread or
-	 * #MDB_txn. Use mdb_txn_abort() to discard a reset handle, and to free
-	 * its lock table slot if MDB_NOTLS is in use.
-	 * Cursors opened within the transaction must not be used
-	 * again after this call, except with #mdb_cursor_renew().
-	 * Reader locks generally don't interfere with writers, but they keep old
-	 * versions of database pages allocated. Thus they prevent the old pages
-	 * from being reused when writers commit new data, and so under heavy load
-	 * the database size may grow much more rapidly than otherwise.
-	 * @param[in] txn A transaction handle returned by #mdb_txn_begin()
-	 */
-void mdb_txn_reset(MDB_txn *txn);
-
-	/** @brief Renew a read-only transaction.
-	 *
-	 * This acquires a new reader lock for a transaction handle that had been
-	 * released by #mdb_txn_reset(). It must be called before a reset transaction
-	 * may be used again.
-	 * @param[in] txn A transaction handle returned by #mdb_txn_begin()
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>#MDB_PANIC - a fatal error occurred earlier and the environment
-	 *		must be shut down.
-	 *	<li>EINVAL - an invalid parameter was specified.
-	 * </ul>
-	 */
-int  mdb_txn_renew(MDB_txn *txn);
-
-/** Compat with version <= 0.9.4, avoid clash with libmdb from MDB Tools project */
-#define mdb_open(txn,name,flags,dbi)	mdb_dbi_open(txn,name,flags,dbi)
-/** Compat with version <= 0.9.4, avoid clash with libmdb from MDB Tools project */
-#define mdb_close(env,dbi)				mdb_dbi_close(env,dbi)
-
-	/** @brief Open a database in the environment.
-	 *
-	 * A database handle denotes the name and parameters of a database,
-	 * independently of whether such a database exists.
-	 * The database handle may be discarded by calling #mdb_dbi_close().
-	 * The old database handle is returned if the database was already open.
-	 * The handle may only be closed once.
-	 *
-	 * The database handle will be private to the current transaction until
-	 * the transaction is successfully committed. If the transaction is
-	 * aborted the handle will be closed automatically.
-	 * After a successful commit the handle will reside in the shared
-	 * environment, and may be used by other transactions.
-	 *
-	 * This function must not be called from multiple concurrent
-	 * transactions in the same process. A transaction that uses
-	 * this function must finish (either commit or abort) before
-	 * any other transaction in the process may use this function.
-	 *
-	 * To use named databases (with name != NULL), #mdb_env_set_maxdbs()
-	 * must be called before opening the environment.  Database names are
-	 * keys in the unnamed database, and may be read but not written.
-	 *
-	 * @param[in] txn A transaction handle returned by #mdb_txn_begin()
-	 * @param[in] name The name of the database to open. If only a single
-	 * 	database is needed in the environment, this value may be NULL.
-	 * @param[in] flags Special options for this database. This parameter
-	 * must be set to 0 or by bitwise OR'ing together one or more of the
-	 * values described here.
-	 * <ul>
-	 *	<li>#MDB_REVERSEKEY
-	 *		Keys are strings to be compared in reverse order, from the end
-	 *		of the strings to the beginning. By default, Keys are treated as strings and
-	 *		compared from beginning to end.
-	 *	<li>#MDB_DUPSORT
-	 *		Duplicate keys may be used in the database. (Or, from another perspective,
-	 *		keys may have multiple data items, stored in sorted order.) By default
-	 *		keys must be unique and may have only a single data item.
-	 *	<li>#MDB_INTEGERKEY
-	 *		Keys are binary integers in native byte order, either unsigned int
-	 *		or size_t, and will be sorted as such.
-	 *		The keys must all be of the same size.
-	 *	<li>#MDB_DUPFIXED
-	 *		This flag may only be used in combination with #MDB_DUPSORT. This option
-	 *		tells the library that the data items for this database are all the same
-	 *		size, which allows further optimizations in storage and retrieval. When
-	 *		all data items are the same size, the #MDB_GET_MULTIPLE, #MDB_NEXT_MULTIPLE
-	 *		and #MDB_PREV_MULTIPLE cursor operations may be used to retrieve multiple
-	 *		items at once.
-	 *	<li>#MDB_INTEGERDUP
-	 *		This option specifies that duplicate data items are binary integers,
-	 *		similar to #MDB_INTEGERKEY keys.
-	 *	<li>#MDB_REVERSEDUP
-	 *		This option specifies that duplicate data items should be compared as
-	 *		strings in reverse order.
-	 *	<li>#MDB_CREATE
-	 *		Create the named database if it doesn't exist. This option is not
-	 *		allowed in a read-only transaction or a read-only environment.
-	 * </ul>
-	 * @param[out] dbi Address where the new #MDB_dbi handle will be stored
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>#MDB_NOTFOUND - the specified database doesn't exist in the environment
-	 *		and #MDB_CREATE was not specified.
-	 *	<li>#MDB_DBS_FULL - too many databases have been opened. See #mdb_env_set_maxdbs().
-	 * </ul>
-	 */
-int  mdb_dbi_open(MDB_txn *txn, const char *name, unsigned int flags, MDB_dbi *dbi);
-
-	/** @brief Retrieve statistics for a database.
-	 *
-	 * @param[in] txn A transaction handle returned by #mdb_txn_begin()
-	 * @param[in] dbi A database handle returned by #mdb_dbi_open()
-	 * @param[out] stat The address of an #MDB_stat structure
-	 * 	where the statistics will be copied
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>EINVAL - an invalid parameter was specified.
-	 * </ul>
-	 */
-int  mdb_stat(MDB_txn *txn, MDB_dbi dbi, MDB_stat *stat);
-
-	/** @brief Retrieve the DB flags for a database handle.
-	 *
-	 * @param[in] txn A transaction handle returned by #mdb_txn_begin()
-	 * @param[in] dbi A database handle returned by #mdb_dbi_open()
-	 * @param[out] flags Address where the flags will be returned.
-	 * @return A non-zero error value on failure and 0 on success.
-	 */
-int mdb_dbi_flags(MDB_txn *txn, MDB_dbi dbi, unsigned int *flags);
-
-	/** @brief Close a database handle. Normally unnecessary. Use with care:
-	 *
-	 * This call is not mutex protected. Handles should only be closed by
-	 * a single thread, and only if no other threads are going to reference
-	 * the database handle or one of its cursors any further. Do not close
-	 * a handle if an existing transaction has modified its database.
-	 * Doing so can cause misbehavior from database corruption to errors
-	 * like MDB_BAD_VALSIZE (since the DB name is gone).
-	 *
-	 * Closing a database handle is not necessary, but lets #mdb_dbi_open()
-	 * reuse the handle value.  Usually it's better to set a bigger
-	 * #mdb_env_set_maxdbs(), unless that value would be large.
-	 *
-	 * @param[in] env An environment handle returned by #mdb_env_create()
-	 * @param[in] dbi A database handle returned by #mdb_dbi_open()
-	 */
-void mdb_dbi_close(MDB_env *env, MDB_dbi dbi);
-
-	/** @brief Empty or delete+close a database.
-	 *
-	 * See #mdb_dbi_close() for restrictions about closing the DB handle.
-	 * @param[in] txn A transaction handle returned by #mdb_txn_begin()
-	 * @param[in] dbi A database handle returned by #mdb_dbi_open()
-	 * @param[in] del 0 to empty the DB, 1 to delete it from the
-	 * environment and close the DB handle.
-	 * @return A non-zero error value on failure and 0 on success.
-	 */
-int  mdb_drop(MDB_txn *txn, MDB_dbi dbi, int del);
-
-	/** @brief Set a custom key comparison function for a database.
-	 *
-	 * The comparison function is called whenever it is necessary to compare a
-	 * key specified by the application with a key currently stored in the database.
-	 * If no comparison function is specified, and no special key flags were specified
-	 * with #mdb_dbi_open(), the keys are compared lexically, with shorter keys collating
-	 * before longer keys.
-	 * @warning This function must be called before any data access functions are used,
-	 * otherwise data corruption may occur. The same comparison function must be used by every
-	 * program accessing the database, every time the database is used.
-	 * @param[in] txn A transaction handle returned by #mdb_txn_begin()
-	 * @param[in] dbi A database handle returned by #mdb_dbi_open()
-	 * @param[in] cmp A #MDB_cmp_func function
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>EINVAL - an invalid parameter was specified.
-	 * </ul>
-	 */
-int  mdb_set_compare(MDB_txn *txn, MDB_dbi dbi, MDB_cmp_func *cmp);
-
-	/** @brief Set a custom data comparison function for a #MDB_DUPSORT database.
-	 *
-	 * This comparison function is called whenever it is necessary to compare a data
-	 * item specified by the application with a data item currently stored in the database.
-	 * This function only takes effect if the database was opened with the #MDB_DUPSORT
-	 * flag.
-	 * If no comparison function is specified, and no special key flags were specified
-	 * with #mdb_dbi_open(), the data items are compared lexically, with shorter items collating
-	 * before longer items.
-	 * @warning This function must be called before any data access functions are used,
-	 * otherwise data corruption may occur. The same comparison function must be used by every
-	 * program accessing the database, every time the database is used.
-	 * @param[in] txn A transaction handle returned by #mdb_txn_begin()
-	 * @param[in] dbi A database handle returned by #mdb_dbi_open()
-	 * @param[in] cmp A #MDB_cmp_func function
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>EINVAL - an invalid parameter was specified.
-	 * </ul>
-	 */
-int  mdb_set_dupsort(MDB_txn *txn, MDB_dbi dbi, MDB_cmp_func *cmp);
-
-	/** @brief Set a relocation function for a #MDB_FIXEDMAP database.
-	 *
-	 * @todo The relocation function is called whenever it is necessary to move the data
-	 * of an item to a different position in the database (e.g. through tree
-	 * balancing operations, shifts as a result of adds or deletes, etc.). It is
-	 * intended to allow address/position-dependent data items to be stored in
-	 * a database in an environment opened with the #MDB_FIXEDMAP option.
-	 * Currently the relocation feature is unimplemented and setting
-	 * this function has no effect.
-	 * @param[in] txn A transaction handle returned by #mdb_txn_begin()
-	 * @param[in] dbi A database handle returned by #mdb_dbi_open()
-	 * @param[in] rel A #MDB_rel_func function
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>EINVAL - an invalid parameter was specified.
-	 * </ul>
-	 */
-int  mdb_set_relfunc(MDB_txn *txn, MDB_dbi dbi, MDB_rel_func *rel);
-
-	/** @brief Set a context pointer for a #MDB_FIXEDMAP database's relocation function.
-	 *
-	 * See #mdb_set_relfunc and #MDB_rel_func for more details.
-	 * @param[in] txn A transaction handle returned by #mdb_txn_begin()
-	 * @param[in] dbi A database handle returned by #mdb_dbi_open()
-	 * @param[in] ctx An arbitrary pointer for whatever the application needs.
-	 * It will be passed to the callback function set by #mdb_set_relfunc
-	 * as its \b relctx parameter whenever the callback is invoked.
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>EINVAL - an invalid parameter was specified.
-	 * </ul>
-	 */
-int  mdb_set_relctx(MDB_txn *txn, MDB_dbi dbi, void *ctx);
-
-	/** @brief Get items from a database.
-	 *
-	 * This function retrieves key/data pairs from the database. The address
-	 * and length of the data associated with the specified \b key are returned
-	 * in the structure to which \b data refers.
-	 * If the database supports duplicate keys (#MDB_DUPSORT) then the
-	 * first data item for the key will be returned. Retrieval of other
-	 * items requires the use of #mdb_cursor_get().
-	 *
-	 * @note The memory pointed to by the returned values is owned by the
-	 * database. The caller need not dispose of the memory, and may not
-	 * modify it in any way. For values returned in a read-only transaction
-	 * any modification attempts will cause a SIGSEGV.
-	 * @note Values returned from the database are valid only until a
-	 * subsequent update operation, or the end of the transaction.
-	 * @param[in] txn A transaction handle returned by #mdb_txn_begin()
-	 * @param[in] dbi A database handle returned by #mdb_dbi_open()
-	 * @param[in] key The key to search for in the database
-	 * @param[out] data The data corresponding to the key
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>#MDB_NOTFOUND - the key was not in the database.
-	 *	<li>EINVAL - an invalid parameter was specified.
-	 * </ul>
-	 */
-int  mdb_get(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data);
-
-	/** @brief Store items into a database.
-	 *
-	 * This function stores key/data pairs in the database. The default behavior
-	 * is to enter the new key/data pair, replacing any previously existing key
-	 * if duplicates are disallowed, or adding a duplicate data item if
-	 * duplicates are allowed (#MDB_DUPSORT).
-	 * @param[in] txn A transaction handle returned by #mdb_txn_begin()
-	 * @param[in] dbi A database handle returned by #mdb_dbi_open()
-	 * @param[in] key The key to store in the database
-	 * @param[in,out] data The data to store
-	 * @param[in] flags Special options for this operation. This parameter
-	 * must be set to 0 or by bitwise OR'ing together one or more of the
-	 * values described here.
-	 * <ul>
-	 *	<li>#MDB_NODUPDATA - enter the new key/data pair only if it does not
-	 *		already appear in the database. This flag may only be specified
-	 *		if the database was opened with #MDB_DUPSORT. The function will
-	 *		return #MDB_KEYEXIST if the key/data pair already appears in the
-	 *		database.
-	 *	<li>#MDB_NOOVERWRITE - enter the new key/data pair only if the key
-	 *		does not already appear in the database. The function will return
-	 *		#MDB_KEYEXIST if the key already appears in the database, even if
-	 *		the database supports duplicates (#MDB_DUPSORT). The \b data
-	 *		parameter will be set to point to the existing item.
-	 *	<li>#MDB_RESERVE - reserve space for data of the given size, but
-	 *		don't copy the given data. Instead, return a pointer to the
-	 *		reserved space, which the caller can fill in later - before
-	 *		the next update operation or the transaction ends. This saves
-	 *		an extra memcpy if the data is being generated later.
-	 *		LMDB does nothing else with this memory, the caller is expected
-	 *		to modify all of the space requested. This flag must not be
-	 *		specified if the database was opened with #MDB_DUPSORT.
-	 *	<li>#MDB_APPEND - append the given key/data pair to the end of the
-	 *		database. This option allows fast bulk loading when keys are
-	 *		already known to be in the correct order. Loading unsorted keys
-	 *		with this flag will cause a #MDB_KEYEXIST error.
-	 *	<li>#MDB_APPENDDUP - as above, but for sorted dup data.
-	 * </ul>
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>#MDB_MAP_FULL - the database is full, see #mdb_env_set_mapsize().
-	 *	<li>#MDB_TXN_FULL - the transaction has too many dirty pages.
-	 *	<li>EACCES - an attempt was made to write in a read-only transaction.
-	 *	<li>EINVAL - an invalid parameter was specified.
-	 * </ul>
-	 */
-int  mdb_put(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data,
-			    unsigned int flags);
-
-	/** @brief Delete items from a database.
-	 *
-	 * This function removes key/data pairs from the database.
-	 * If the database does not support sorted duplicate data items
-	 * (#MDB_DUPSORT) the data parameter is ignored.
-	 * If the database supports sorted duplicates and the data parameter
-	 * is NULL, all of the duplicate data items for the key will be
-	 * deleted. Otherwise, if the data parameter is non-NULL
-	 * only the matching data item will be deleted.
-	 * This function will return #MDB_NOTFOUND if the specified key/data
-	 * pair is not in the database.
-	 * @param[in] txn A transaction handle returned by #mdb_txn_begin()
-	 * @param[in] dbi A database handle returned by #mdb_dbi_open()
-	 * @param[in] key The key to delete from the database
-	 * @param[in] data The data to delete
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>EACCES - an attempt was made to write in a read-only transaction.
-	 *	<li>EINVAL - an invalid parameter was specified.
-	 * </ul>
-	 */
-int  mdb_del(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data);
-
-	/** @brief Create a cursor handle.
-	 *
-	 * A cursor is associated with a specific transaction and database.
-	 * A cursor cannot be used when its database handle is closed.  Nor
-	 * when its transaction has ended, except with #mdb_cursor_renew().
-	 * It can be discarded with #mdb_cursor_close().
-	 * A cursor in a write-transaction can be closed before its transaction
-	 * ends, and will otherwise be closed when its transaction ends.
-	 * A cursor in a read-only transaction must be closed explicitly, before
-	 * or after its transaction ends. It can be reused with
-	 * #mdb_cursor_renew() before finally closing it.
-	 * @note Earlier documentation said that cursors in every transaction
-	 * were closed when the transaction committed or aborted.
-	 * @param[in] txn A transaction handle returned by #mdb_txn_begin()
-	 * @param[in] dbi A database handle returned by #mdb_dbi_open()
-	 * @param[out] cursor Address where the new #MDB_cursor handle will be stored
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>EINVAL - an invalid parameter was specified.
-	 * </ul>
-	 */
-int  mdb_cursor_open(MDB_txn *txn, MDB_dbi dbi, MDB_cursor **cursor);
-
-	/** @brief Close a cursor handle.
-	 *
-	 * The cursor handle will be freed and must not be used again after this call.
-	 * Its transaction must still be live if it is a write-transaction.
-	 * @param[in] cursor A cursor handle returned by #mdb_cursor_open()
-	 */
-void mdb_cursor_close(MDB_cursor *cursor);
-
-	/** @brief Renew a cursor handle.
-	 *
-	 * A cursor is associated with a specific transaction and database.
-	 * Cursors that are only used in read-only
-	 * transactions may be re-used, to avoid unnecessary malloc/free overhead.
-	 * The cursor may be associated with a new read-only transaction, and
-	 * referencing the same database handle as it was created with.
-	 * This may be done whether the previous transaction is live or dead.
-	 * @param[in] txn A transaction handle returned by #mdb_txn_begin()
-	 * @param[in] cursor A cursor handle returned by #mdb_cursor_open()
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>EINVAL - an invalid parameter was specified.
-	 * </ul>
-	 */
-int  mdb_cursor_renew(MDB_txn *txn, MDB_cursor *cursor);
-
-	/** @brief Return the cursor's transaction handle.
-	 *
-	 * @param[in] cursor A cursor handle returned by #mdb_cursor_open()
-	 */
-MDB_txn *mdb_cursor_txn(MDB_cursor *cursor);
-
-	/** @brief Return the cursor's database handle.
-	 *
-	 * @param[in] cursor A cursor handle returned by #mdb_cursor_open()
-	 */
-MDB_dbi mdb_cursor_dbi(MDB_cursor *cursor);
-
-	/** @brief Retrieve by cursor.
-	 *
-	 * This function retrieves key/data pairs from the database. The address and length
-	 * of the key are returned in the object to which \b key refers (except for the
-	 * case of the #MDB_SET option, in which the \b key object is unchanged), and
-	 * the address and length of the data are returned in the object to which \b data
-	 * refers.
-	 * See #mdb_get() for restrictions on using the output values.
-	 * @param[in] cursor A cursor handle returned by #mdb_cursor_open()
-	 * @param[in,out] key The key for a retrieved item
-	 * @param[in,out] data The data of a retrieved item
-	 * @param[in] op A cursor operation #MDB_cursor_op
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>#MDB_NOTFOUND - no matching key found.
-	 *	<li>EINVAL - an invalid parameter was specified.
-	 * </ul>
-	 */
-int  mdb_cursor_get(MDB_cursor *cursor, MDB_val *key, MDB_val *data,
-			    MDB_cursor_op op);
-
-	/** @brief Store by cursor.
-	 *
-	 * This function stores key/data pairs into the database.
-	 * The cursor is positioned at the new item, or on failure usually near it.
-	 * @note Earlier documentation incorrectly said errors would leave the
-	 * state of the cursor unchanged.
-	 * @param[in] cursor A cursor handle returned by #mdb_cursor_open()
-	 * @param[in] key The key operated on.
-	 * @param[in] data The data operated on.
-	 * @param[in] flags Options for this operation. This parameter
-	 * must be set to 0 or one of the values described here.
-	 * <ul>
-	 *	<li>#MDB_CURRENT - replace the item at the current cursor position.
-	 *		The \b key parameter must still be provided, and must match it.
-	 *		If using sorted duplicates (#MDB_DUPSORT) the data item must still
-	 *		sort into the same place. This is intended to be used when the
-	 *		new data is the same size as the old. Otherwise it will simply
-	 *		perform a delete of the old record followed by an insert.
-	 *	<li>#MDB_NODUPDATA - enter the new key/data pair only if it does not
-	 *		already appear in the database. This flag may only be specified
-	 *		if the database was opened with #MDB_DUPSORT. The function will
-	 *		return #MDB_KEYEXIST if the key/data pair already appears in the
-	 *		database.
-	 *	<li>#MDB_NOOVERWRITE - enter the new key/data pair only if the key
-	 *		does not already appear in the database. The function will return
-	 *		#MDB_KEYEXIST if the key already appears in the database, even if
-	 *		the database supports duplicates (#MDB_DUPSORT).
-	 *	<li>#MDB_RESERVE - reserve space for data of the given size, but
-	 *		don't copy the given data. Instead, return a pointer to the
-	 *		reserved space, which the caller can fill in later - before
-	 *		the next update operation or the transaction ends. This saves
-	 *		an extra memcpy if the data is being generated later. This flag
-	 *		must not be specified if the database was opened with #MDB_DUPSORT.
-	 *	<li>#MDB_APPEND - append the given key/data pair to the end of the
-	 *		database. No key comparisons are performed. This option allows
-	 *		fast bulk loading when keys are already known to be in the
-	 *		correct order. Loading unsorted keys with this flag will cause
-	 *		a #MDB_KEYEXIST error.
-	 *	<li>#MDB_APPENDDUP - as above, but for sorted dup data.
-	 *	<li>#MDB_MULTIPLE - store multiple contiguous data elements in a
-	 *		single request. This flag may only be specified if the database
-	 *		was opened with #MDB_DUPFIXED. The \b data argument must be an
-	 *		array of two MDB_vals. The mv_size of the first MDB_val must be
-	 *		the size of a single data element. The mv_data of the first MDB_val
-	 *		must point to the beginning of the array of contiguous data elements.
-	 *		The mv_size of the second MDB_val must be the count of the number
-	 *		of data elements to store. On return this field will be set to
-	 *		the count of the number of elements actually written. The mv_data
-	 *		of the second MDB_val is unused.
-	 * </ul>
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>#MDB_MAP_FULL - the database is full, see #mdb_env_set_mapsize().
-	 *	<li>#MDB_TXN_FULL - the transaction has too many dirty pages.
-	 *	<li>EACCES - an attempt was made to write in a read-only transaction.
-	 *	<li>EINVAL - an invalid parameter was specified.
-	 * </ul>
-	 */
-int  mdb_cursor_put(MDB_cursor *cursor, MDB_val *key, MDB_val *data,
-				unsigned int flags);
-
-	/** @brief Delete current key/data pair
-	 *
-	 * This function deletes the key/data pair to which the cursor refers.
-	 * @param[in] cursor A cursor handle returned by #mdb_cursor_open()
-	 * @param[in] flags Options for this operation. This parameter
-	 * must be set to 0 or one of the values described here.
-	 * <ul>
-	 *	<li>#MDB_NODUPDATA - delete all of the data items for the current key.
-	 *		This flag may only be specified if the database was opened with #MDB_DUPSORT.
-	 * </ul>
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>EACCES - an attempt was made to write in a read-only transaction.
-	 *	<li>EINVAL - an invalid parameter was specified.
-	 * </ul>
-	 */
-int  mdb_cursor_del(MDB_cursor *cursor, unsigned int flags);
-
-	/** @brief Return count of duplicates for current key.
-	 *
-	 * This call is only valid on databases that support sorted duplicate
-	 * data items #MDB_DUPSORT.
-	 * @param[in] cursor A cursor handle returned by #mdb_cursor_open()
-	 * @param[out] countp Address where the count will be stored
-	 * @return A non-zero error value on failure and 0 on success. Some possible
-	 * errors are:
-	 * <ul>
-	 *	<li>EINVAL - cursor is not initialized, or an invalid parameter was specified.
-	 * </ul>
-	 */
-int  mdb_cursor_count(MDB_cursor *cursor, size_t *countp);
-
-	/** @brief Compare two data items according to a particular database.
-	 *
-	 * This returns a comparison as if the two data items were keys in the
-	 * specified database.
-	 * @param[in] txn A transaction handle returned by #mdb_txn_begin()
-	 * @param[in] dbi A database handle returned by #mdb_dbi_open()
-	 * @param[in] a The first item to compare
-	 * @param[in] b The second item to compare
-	 * @return < 0 if a < b, 0 if a == b, > 0 if a > b
-	 */
-int  mdb_cmp(MDB_txn *txn, MDB_dbi dbi, const MDB_val *a, const MDB_val *b);
-
-	/** @brief Compare two data items according to a particular database.
-	 *
-	 * This returns a comparison as if the two items were data items of
-	 * the specified database. The database must have the #MDB_DUPSORT flag.
-	 * @param[in] txn A transaction handle returned by #mdb_txn_begin()
-	 * @param[in] dbi A database handle returned by #mdb_dbi_open()
-	 * @param[in] a The first item to compare
-	 * @param[in] b The second item to compare
-	 * @return < 0 if a < b, 0 if a == b, > 0 if a > b
-	 */
-int  mdb_dcmp(MDB_txn *txn, MDB_dbi dbi, const MDB_val *a, const MDB_val *b);
-
-	/** @brief A callback function used to print a message from the library.
-	 *
-	 * @param[in] msg The string to be printed.
-	 * @param[in] ctx An arbitrary context pointer for the callback.
-	 * @return < 0 on failure, >= 0 on success.
-	 */
-typedef int (MDB_msg_func)(const char *msg, void *ctx);
-
-	/** @brief Dump the entries in the reader lock table.
-	 *
-	 * @param[in] env An environment handle returned by #mdb_env_create()
-	 * @param[in] func A #MDB_msg_func function
-	 * @param[in] ctx Anything the message function needs
-	 * @return < 0 on failure, >= 0 on success.
-	 */
-int	mdb_reader_list(MDB_env *env, MDB_msg_func *func, void *ctx);
-
-	/** @brief Check for stale entries in the reader lock table.
-	 *
-	 * @param[in] env An environment handle returned by #mdb_env_create()
-	 * @param[out] dead Number of stale slots that were cleared
-	 * @return 0 on success, non-zero on failure.
-	 */
-int	mdb_reader_check(MDB_env *env, int *dead);
-/**	@} */
-
-#ifdef __cplusplus
-}
-#endif
-/** @page tools LMDB Command Line Tools
-	The following describes the command line tools that are available for LMDB.
-	\li \ref mdb_copy_1
-	\li \ref mdb_dump_1
-	\li \ref mdb_load_1
-	\li \ref mdb_stat_1
-*/
-
-#endif /* _LMDB_H_ */

ext/include/midl.h

@@ -1,186 +0,0 @@
-/**	@file midl.h
- *	@brief LMDB ID List header file.
- *
- *	This file was originally part of back-bdb but has been
- *	modified for use in libmdb. Most of the macros defined
- *	in this file are unused, just left over from the original.
- *
- *	This file is only used internally in libmdb and its definitions
- *	are not exposed publicly.
- */
-/* $OpenLDAP$ */
-/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
- *
- * Copyright 2000-2018 The OpenLDAP Foundation.
- * Portions Copyright 2001-2018 Howard Chu, Symas Corp.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted only as authorized by the OpenLDAP
- * Public License.
- *
- * A copy of this license is available in the file LICENSE in the
- * top-level directory of the distribution or, alternatively, at
- * <http://www.OpenLDAP.org/license.html>.
- */
-
-#ifndef _MDB_MIDL_H_
-#define _MDB_MIDL_H_
-
-#include <stddef.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/** @defgroup internal	LMDB Internals
- *	@{
- */
-
-/** @defgroup idls	ID List Management
- *	@{
- */
-	/** A generic unsigned ID number. These were entryIDs in back-bdb.
-	 *	Preferably it should have the same size as a pointer.
-	 */
-typedef size_t MDB_ID;
-
-	/** An IDL is an ID List, a sorted array of IDs. The first
-	 * element of the array is a counter for how many actual
-	 * IDs are in the list. In the original back-bdb code, IDLs are
-	 * sorted in ascending order. For libmdb IDLs are sorted in
-	 * descending order.
-	 */
-typedef MDB_ID *MDB_IDL;
-
-/* IDL sizes - likely should be even bigger
- *   limiting factors: sizeof(ID), thread stack size
- */
-#define	MDB_IDL_LOGN	16	/* DB_SIZE is 2^16, UM_SIZE is 2^17 */
-#define MDB_IDL_DB_SIZE		(1<<MDB_IDL_LOGN)
-#define MDB_IDL_UM_SIZE		(1<<(MDB_IDL_LOGN+1))
-
-#define MDB_IDL_DB_MAX		(MDB_IDL_DB_SIZE-1)
-#define MDB_IDL_UM_MAX		(MDB_IDL_UM_SIZE-1)
-
-#define MDB_IDL_SIZEOF(ids)		(((ids)[0]+1) * sizeof(MDB_ID))
-#define MDB_IDL_IS_ZERO(ids) ( (ids)[0] == 0 )
-#define MDB_IDL_CPY( dst, src ) (memcpy( dst, src, MDB_IDL_SIZEOF( src ) ))
-#define MDB_IDL_FIRST( ids )	( (ids)[1] )
-#define MDB_IDL_LAST( ids )		( (ids)[(ids)[0]] )
-
-	/** Current max length of an #mdb_midl_alloc()ed IDL */
-#define MDB_IDL_ALLOCLEN( ids )	( (ids)[-1] )
-
-	/** Append ID to IDL. The IDL must be big enough. */
-#define mdb_midl_xappend(idl, id) do { \
-		MDB_ID *xidl = (idl), xlen = ++(xidl[0]); \
-		xidl[xlen] = (id); \
-	} while (0)
-
-	/** Search for an ID in an IDL.
-	 * @param[in] ids	The IDL to search.
-	 * @param[in] id	The ID to search for.
-	 * @return	The index of the first ID greater than or equal to \b id.
-	 */
-unsigned mdb_midl_search( MDB_IDL ids, MDB_ID id );
-
-	/** Allocate an IDL.
-	 * Allocates memory for an IDL of the given size.
-	 * @return	IDL on success, NULL on failure.
-	 */
-MDB_IDL mdb_midl_alloc(int num);
-
-	/** Free an IDL.
-	 * @param[in] ids	The IDL to free.
-	 */
-void mdb_midl_free(MDB_IDL ids);
-
-	/** Shrink an IDL.
-	 * Return the IDL to the default size if it has grown larger.
-	 * @param[in,out] idp	Address of the IDL to shrink.
-	 */
-void mdb_midl_shrink(MDB_IDL *idp);
-
-	/** Make room for num additional elements in an IDL.
-	 * @param[in,out] idp	Address of the IDL.
-	 * @param[in] num	Number of elements to make room for.
-	 * @return	0 on success, ENOMEM on failure.
-	 */
-int mdb_midl_need(MDB_IDL *idp, unsigned num);
-
-	/** Append an ID onto an IDL.
-	 * @param[in,out] idp	Address of the IDL to append to.
-	 * @param[in] id	The ID to append.
-	 * @return	0 on success, ENOMEM if the IDL is too large.
-	 */
-int mdb_midl_append( MDB_IDL *idp, MDB_ID id );
-
-	/** Append an IDL onto an IDL.
-	 * @param[in,out] idp	Address of the IDL to append to.
-	 * @param[in] app	The IDL to append.
-	 * @return	0 on success, ENOMEM if the IDL is too large.
-	 */
-int mdb_midl_append_list( MDB_IDL *idp, MDB_IDL app );
-
-	/** Append an ID range onto an IDL.
-	 * @param[in,out] idp	Address of the IDL to append to.
-	 * @param[in] id	The lowest ID to append.
-	 * @param[in] n		Number of IDs to append.
-	 * @return	0 on success, ENOMEM if the IDL is too large.
-	 */
-int mdb_midl_append_range( MDB_IDL *idp, MDB_ID id, unsigned n );
-
-	/** Merge an IDL onto an IDL. The destination IDL must be big enough.
-	 * @param[in] idl	The IDL to merge into.
-	 * @param[in] merge	The IDL to merge.
-	 */
-void mdb_midl_xmerge( MDB_IDL idl, MDB_IDL merge );
-
-	/** Sort an IDL.
-	 * @param[in,out] ids	The IDL to sort.
-	 */
-void mdb_midl_sort( MDB_IDL ids );
-
-	/** An ID2 is an ID/pointer pair.
-	 */
-typedef struct MDB_ID2 {
-	MDB_ID mid;		/**< The ID */
-	void *mptr;		/**< The pointer */
-} MDB_ID2;
-
-	/** An ID2L is an ID2 List, a sorted array of ID2s.
-	 * The first element's \b mid member is a count of how many actual
-	 * elements are in the array. The \b mptr member of the first element is unused.
-	 * The array is sorted in ascending order by \b mid.
-	 */
-typedef MDB_ID2 *MDB_ID2L;
-
-	/** Search for an ID in an ID2L.
-	 * @param[in] ids	The ID2L to search.
-	 * @param[in] id	The ID to search for.
-	 * @return	The index of the first ID2 whose \b mid member is greater than or equal to \b id.
-	 */
-unsigned mdb_mid2l_search( MDB_ID2L ids, MDB_ID id );
-
-
-	/** Insert an ID2 into a ID2L.
-	 * @param[in,out] ids	The ID2L to insert into.
-	 * @param[in] id	The ID2 to insert.
-	 * @return	0 on success, -1 if the ID was already present in the ID2L.
-	 */
-int mdb_mid2l_insert( MDB_ID2L ids, MDB_ID2 *id );
-
-	/** Append an ID2 into a ID2L.
-	 * @param[in,out] ids	The ID2L to append into.
-	 * @param[in] id	The ID2 to append.
-	 * @return	0 on success, -2 if the ID2L is too big.
-	 */
-int mdb_mid2l_append( MDB_ID2L ids, MDB_ID2 *id );
-
-/** @} */
-/** @} */
-#ifdef __cplusplus
-}
-#endif
-#endif	/* _MDB_MIDL_H_ */

ext/include/tpl.h

@@ -1,137 +0,0 @@
-/*
-Copyright (c) 2005-2013, Troy D. Hanson     http://troydhanson.github.com/tpl/
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
-
-    * Redistributions of source code must retain the above copyright
-      notice, this list of conditions and the following disclaimer.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
-OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-#ifndef TPL_H
-#define TPL_H 
-
-#include <stddef.h>     /* size_t */
-
-#include <stdarg.h>  /* va_list */
-
-#ifdef __INTEL_COMPILER
-#include <tbb/tbbmalloc_proxy.h>
-#endif /* Intel Compiler efficient memcpy etc */
-
-#ifdef _MSC_VER
-typedef unsigned int uint32_t;
-#else
-#include <inttypes.h>   /* uint32_t */
-#endif
-
-#if defined __cplusplus
-extern "C" {
-#endif
-
-#ifdef _WIN32
-#ifdef TPL_EXPORTS
-#define TPL_API __declspec(dllexport)
-#else							/*  */
-#ifdef TPL_NOLIB
-#define TPL_API
-#else
-#define TPL_API __declspec(dllimport)
-#endif /* TPL_NOLIB */
-#endif	/* TPL_EXPORTS*/
-#else
-#define TPL_API
-#endif
-
-/* bit flags (external) */
-#define TPL_FILE      (1 << 0)
-#define TPL_MEM       (1 << 1)
-#define TPL_PREALLOCD (1 << 2)
-#define TPL_EXCESS_OK (1 << 3)
-#define TPL_FD        (1 << 4)
-#define TPL_UFREE     (1 << 5)  
-#define TPL_DATAPEEK  (1 << 6)  
-#define TPL_FXLENS    (1 << 7)  
-#define TPL_GETSIZE   (1 << 8)
-/* do not add flags here without renumbering the internal flags! */
-
-/* flags for tpl_gather mode */
-#define TPL_GATHER_BLOCKING    1
-#define TPL_GATHER_NONBLOCKING 2
-#define TPL_GATHER_MEM         3
-
-/* Hooks for error logging, memory allocation functions and fatal */
-typedef int (tpl_print_fcn)(const char *fmt, ...);
-typedef void *(tpl_malloc_fcn)(size_t sz);
-typedef void *(tpl_realloc_fcn)(void *ptr, size_t sz);
-typedef void (tpl_free_fcn)(void *ptr);
-typedef void (tpl_fatal_fcn)(const char *fmt, ...);
-
-typedef struct tpl_hook_t {
-    tpl_print_fcn *oops;
-    tpl_malloc_fcn *malloc;
-    tpl_realloc_fcn *realloc;
-    tpl_free_fcn *free;
-    tpl_fatal_fcn *fatal;
-    size_t gather_max;
-} tpl_hook_t;
-
-typedef struct tpl_node {
-    int type;
-    void *addr;
-    void *data;                  /* r:tpl_root_data*. A:tpl_atyp*. ow:szof type */
-    int num;                     /* length of type if its a C array */
-    size_t ser_osz;              /* serialization output size for subtree */
-    struct tpl_node *children;   /* my children; linked-list */
-    struct tpl_node *next,*prev; /* my siblings (next child of my parent) */
-    struct tpl_node *parent;     /* my parent */
-} tpl_node;
-
-/* used when un/packing 'B' type (binary buffers) */
-typedef struct tpl_bin {
-    void *addr;
-    uint32_t sz;
-} tpl_bin;
-
-/* for async/piecemeal reading of tpl images */
-typedef struct tpl_gather_t {
-    char *img;
-    int len;
-} tpl_gather_t;
-
-/* Callback used when tpl_gather has read a full tpl image */
-typedef int (tpl_gather_cb)(void *img, size_t sz, void *data);
-
-/* Prototypes */
-TPL_API tpl_node *tpl_map(char *fmt,...);       /* define tpl using format */
-TPL_API void tpl_free(tpl_node *r);             /* free a tpl map */
-TPL_API int tpl_pack(tpl_node *r, int i);       /* pack the n'th packable */
-TPL_API int tpl_unpack(tpl_node *r, int i);     /* unpack the n'th packable */
-TPL_API int tpl_dump(tpl_node *r, int mode, ...); /* serialize to mem/file */
-TPL_API int tpl_load(tpl_node *r, int mode, ...); /* set mem/file to unpack */
-TPL_API int tpl_Alen(tpl_node *r, int i);      /* array len of packable i */
-TPL_API char* tpl_peek(int mode, ...);         /* sneak peek at format string */
-TPL_API int tpl_gather( int mode, ...);        /* non-blocking image gather */
-TPL_API int tpl_jot(int mode, ...);            /* quick write a simple tpl */
-
-TPL_API tpl_node *tpl_map_va(char *fmt, va_list ap);
-
-#if defined __cplusplus
-    }
-#endif
-
-#endif /* TPL_H */
-

ext/lib/mdb.c

@@ -1,10266 +0,0 @@
-/** @file mdb.c
- *	@brief Lightning memory-mapped database library
- *
- *	A Btree-based database management library modeled loosely on the
- *	BerkeleyDB API, but much simplified.
- */
-/*
- * Copyright 2011-2018 Howard Chu, Symas Corp.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted only as authorized by the OpenLDAP
- * Public License.
- *
- * A copy of this license is available in the file LICENSE in the
- * top-level directory of the distribution or, alternatively, at
- * <http://www.OpenLDAP.org/license.html>.
- *
- * This code is derived from btree.c written by Martin Hedenfalk.
- *
- * Copyright (c) 2009, 2010 Martin Hedenfalk <martin@bzero.se>
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- */
-#ifndef _GNU_SOURCE
-#define _GNU_SOURCE 1
-#endif
-#if defined(__WIN64__)
-#define _FILE_OFFSET_BITS	64
-#endif
-#ifdef _WIN32
-#include <malloc.h>
-#include <windows.h>
-#include <wchar.h>				/* get wcscpy() */
-
-/** getpid() returns int; MinGW defines pid_t but MinGW64 typedefs it
- *  as int64 which is wrong. MSVC doesn't define it at all, so just
- *  don't use it.
- */
-#define MDB_PID_T	int
-#define MDB_THR_T	DWORD
-#include <sys/types.h>
-#include <sys/stat.h>
-#ifdef __GNUC__
-# include <sys/param.h>
-#else
-# define LITTLE_ENDIAN	1234
-# define BIG_ENDIAN	4321
-# define BYTE_ORDER	LITTLE_ENDIAN
-# ifndef SSIZE_MAX
-#  define SSIZE_MAX	INT_MAX
-# endif
-#endif
-#else
-#include <sys/types.h>
-#include <sys/stat.h>
-#define MDB_PID_T	pid_t
-#define MDB_THR_T	pthread_t
-#include <sys/param.h>
-#include <sys/uio.h>
-#include <sys/mman.h>
-#ifdef HAVE_SYS_FILE_H
-#include <sys/file.h>
-#endif
-#include <fcntl.h>
-#endif
-
-#if defined(__mips) && defined(__linux)
-/* MIPS has cache coherency issues, requires explicit cache control */
-#include <asm/cachectl.h>
-extern int cacheflush(char *addr, int nbytes, int cache);
-#define CACHEFLUSH(addr, bytes, cache)	cacheflush(addr, bytes, cache)
-#else
-#define CACHEFLUSH(addr, bytes, cache)
-#endif
-
-#if defined(__linux) && !defined(MDB_FDATASYNC_WORKS)
-/** fdatasync is broken on ext3/ext4fs on older kernels, see
- *	description in #mdb_env_open2 comments. You can safely
- *	define MDB_FDATASYNC_WORKS if this code will only be run
- *	on kernels 3.6 and newer.
- */
-#define	BROKEN_FDATASYNC
-#endif
-
-#include <errno.h>
-#include <limits.h>
-#include <stddef.h>
-#include <inttypes.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
-
-#ifdef _MSC_VER
-#include <io.h>
-typedef SSIZE_T	ssize_t;
-#else
-#include <unistd.h>
-#endif
-
-#if defined(__sun) || defined(ANDROID)
-/* Most platforms have posix_memalign, older may only have memalign */
-#define HAVE_MEMALIGN	1
-#include <malloc.h>
-/* On Solaris, we need the POSIX sigwait function */
-#if defined (__sun)
-# define _POSIX_PTHREAD_SEMANTICS	1
-#endif
-#endif
-
-#if !(defined(BYTE_ORDER) || defined(__BYTE_ORDER))
-#include <netinet/in.h>
-#include <resolv.h>	/* defines BYTE_ORDER on HPUX and Solaris */
-#endif
-
-#if defined(__APPLE__) || defined (BSD) || defined(__FreeBSD_kernel__)
-# define MDB_USE_POSIX_SEM	1
-# define MDB_FDATASYNC		fsync
-#elif defined(ANDROID)
-# define MDB_FDATASYNC		fsync
-#endif
-
-#ifndef _WIN32
-#include <pthread.h>
-#include <signal.h>
-#ifdef MDB_USE_POSIX_SEM
-# define MDB_USE_HASH		1
-#include <semaphore.h>
-#else
-#define MDB_USE_POSIX_MUTEX	1
-#endif
-#endif
-
-#if defined(_WIN32) + defined(MDB_USE_POSIX_SEM) \
-	+ defined(MDB_USE_POSIX_MUTEX) != 1
-# error "Ambiguous shared-lock implementation"
-#endif
-
-#ifdef USE_VALGRIND
-#include <valgrind/memcheck.h>
-#define VGMEMP_CREATE(h,r,z)    VALGRIND_CREATE_MEMPOOL(h,r,z)
-#define VGMEMP_ALLOC(h,a,s) VALGRIND_MEMPOOL_ALLOC(h,a,s)
-#define VGMEMP_FREE(h,a) VALGRIND_MEMPOOL_FREE(h,a)
-#define VGMEMP_DESTROY(h)	VALGRIND_DESTROY_MEMPOOL(h)
-#define VGMEMP_DEFINED(a,s)	VALGRIND_MAKE_MEM_DEFINED(a,s)
-#else
-#define VGMEMP_CREATE(h,r,z)
-#define VGMEMP_ALLOC(h,a,s)
-#define VGMEMP_FREE(h,a)
-#define VGMEMP_DESTROY(h)
-#define VGMEMP_DEFINED(a,s)
-#endif
-
-#ifndef BYTE_ORDER
-# if (defined(_LITTLE_ENDIAN) || defined(_BIG_ENDIAN)) && !(defined(_LITTLE_ENDIAN) && defined(_BIG_ENDIAN))
-/* Solaris just defines one or the other */
-#  define LITTLE_ENDIAN	1234
-#  define BIG_ENDIAN	4321
-#  ifdef _LITTLE_ENDIAN
-#   define BYTE_ORDER  LITTLE_ENDIAN
-#  else
-#   define BYTE_ORDER  BIG_ENDIAN
-#  endif
-# else
-#  define BYTE_ORDER   __BYTE_ORDER
-# endif
-#endif
-
-#ifndef LITTLE_ENDIAN
-#define LITTLE_ENDIAN	__LITTLE_ENDIAN
-#endif
-#ifndef BIG_ENDIAN
-#define BIG_ENDIAN	__BIG_ENDIAN
-#endif
-
-#if defined(__i386) || defined(__x86_64) || defined(_M_IX86)
-#define MISALIGNED_OK	1
-#endif
-
-#include "lmdb.h"
-#include "midl.h"
-
-#if (BYTE_ORDER == LITTLE_ENDIAN) == (BYTE_ORDER == BIG_ENDIAN)
-# error "Unknown or unsupported endianness (BYTE_ORDER)"
-#elif (-6 & 5) || CHAR_BIT != 8 || UINT_MAX < 0xffffffff || ULONG_MAX % 0xFFFF
-# error "Two's complement, reasonably sized integer types, please"
-#endif
-
-#ifdef __GNUC__
-/** Put infrequently used env functions in separate section */
-# ifdef __APPLE__
-#  define	ESECT	__attribute__ ((section("__TEXT,text_env")))
-# else
-#  define	ESECT	__attribute__ ((section("text_env")))
-# endif
-#else
-#define ESECT
-#endif
-
-#ifdef _WIN32
-#define CALL_CONV WINAPI
-#else
-#define CALL_CONV
-#endif
-
-/** @defgroup internal	LMDB Internals
- *	@{
- */
-/** @defgroup compat	Compatibility Macros
- *	A bunch of macros to minimize the amount of platform-specific ifdefs
- *	needed throughout the rest of the code. When the features this library
- *	needs are similar enough to POSIX to be hidden in a one-or-two line
- *	replacement, this macro approach is used.
- *	@{
- */
-
-	/** Features under development */
-#ifndef MDB_DEVEL
-#define MDB_DEVEL 0
-#endif
-
-	/** Wrapper around __func__, which is a C99 feature */
-#if __STDC_VERSION__ >= 199901L
-# define mdb_func_	__func__
-#elif __GNUC__ >= 2 || _MSC_VER >= 1300
-# define mdb_func_	__FUNCTION__
-#else
-/* If a debug message says <mdb_unknown>(), update the #if statements above */
-# define mdb_func_	"<mdb_unknown>"
-#endif
-
-/* Internal error codes, not exposed outside liblmdb */
-#define	MDB_NO_ROOT		(MDB_LAST_ERRCODE + 10)
-#ifdef _WIN32
-#define MDB_OWNERDEAD	((int) WAIT_ABANDONED)
-#elif defined(MDB_USE_POSIX_MUTEX) && defined(EOWNERDEAD)
-#define MDB_OWNERDEAD	EOWNERDEAD	/**< #LOCK_MUTEX0() result if dead owner */
-#endif
-
-#ifdef __GLIBC__
-#define	GLIBC_VER	((__GLIBC__ << 16 )| __GLIBC_MINOR__)
-#endif
-/** Some platforms define the EOWNERDEAD error code
- * even though they don't support Robust Mutexes.
- * Compile with -DMDB_USE_ROBUST=0, or use some other
- * mechanism like -DMDB_USE_POSIX_SEM instead of
- * -DMDB_USE_POSIX_MUTEX.
- * (Posix semaphores are not robust.)
- */
-#ifndef MDB_USE_ROBUST
-/* Android currently lacks Robust Mutex support. So does glibc < 2.4. */
-# if defined(MDB_USE_POSIX_MUTEX) && (defined(ANDROID) || \
-	(defined(__GLIBC__) && GLIBC_VER < 0x020004))
-#  define MDB_USE_ROBUST	0
-# else
-#  define MDB_USE_ROBUST	1
-# endif
-#endif /* !MDB_USE_ROBUST */
-
-#if defined(MDB_USE_POSIX_MUTEX) && (MDB_USE_ROBUST)
-/* glibc < 2.12 only provided _np API */
-#  if (defined(__GLIBC__) && GLIBC_VER < 0x02000c) || \
-	(defined(PTHREAD_MUTEX_ROBUST_NP) && !defined(PTHREAD_MUTEX_ROBUST))
-#   define PTHREAD_MUTEX_ROBUST	PTHREAD_MUTEX_ROBUST_NP
-#   define pthread_mutexattr_setrobust(attr, flag)	pthread_mutexattr_setrobust_np(attr, flag)
-#   define pthread_mutex_consistent(mutex)	pthread_mutex_consistent_np(mutex)
-#  endif
-#endif /* MDB_USE_POSIX_MUTEX && MDB_USE_ROBUST */
-
-#if defined(MDB_OWNERDEAD) && (MDB_USE_ROBUST)
-#define MDB_ROBUST_SUPPORTED	1
-#endif
-
-#ifdef _WIN32
-#define MDB_USE_HASH	1
-#define MDB_PIDLOCK	0
-#define THREAD_RET	DWORD
-#define pthread_t	HANDLE
-#define pthread_mutex_t	HANDLE
-#define pthread_cond_t	HANDLE
-typedef HANDLE mdb_mutex_t, mdb_mutexref_t;
-#define pthread_key_t	DWORD
-#define pthread_self()	GetCurrentThreadId()
-#define pthread_key_create(x,y)	\
-	((*(x) = TlsAlloc()) == TLS_OUT_OF_INDEXES ? ErrCode() : 0)
-#define pthread_key_delete(x)	TlsFree(x)
-#define pthread_getspecific(x)	TlsGetValue(x)
-#define pthread_setspecific(x,y)	(TlsSetValue(x,y) ? 0 : ErrCode())
-#define pthread_mutex_unlock(x)	ReleaseMutex(*x)
-#define pthread_mutex_lock(x)	WaitForSingleObject(*x, INFINITE)
-#define pthread_cond_signal(x)	SetEvent(*x)
-#define pthread_cond_wait(cond,mutex)	do{SignalObjectAndWait(*mutex, *cond, INFINITE, FALSE); WaitForSingleObject(*mutex, INFINITE);}while(0)
-#define THREAD_CREATE(thr,start,arg) \
-	(((thr) = CreateThread(NULL, 0, start, arg, 0, NULL)) ? 0 : ErrCode())
-#define THREAD_FINISH(thr) \
-	(WaitForSingleObject(thr, INFINITE) ? ErrCode() : 0)
-#define LOCK_MUTEX0(mutex)		WaitForSingleObject(mutex, INFINITE)
-#define UNLOCK_MUTEX(mutex)		ReleaseMutex(mutex)
-#define mdb_mutex_consistent(mutex)	0
-#define getpid()	GetCurrentProcessId()
-#define	MDB_FDATASYNC(fd)	(!FlushFileBuffers(fd))
-#define	MDB_MSYNC(addr,len,flags)	(!FlushViewOfFile(addr,len))
-#define	ErrCode()	GetLastError()
-#define GET_PAGESIZE(x) {SYSTEM_INFO si; GetSystemInfo(&si); (x) = si.dwPageSize;}
-#define	close(fd)	(CloseHandle(fd) ? 0 : -1)
-#define	munmap(ptr,len)	UnmapViewOfFile(ptr)
-#ifdef PROCESS_QUERY_LIMITED_INFORMATION
-#define MDB_PROCESS_QUERY_LIMITED_INFORMATION PROCESS_QUERY_LIMITED_INFORMATION
-#else
-#define MDB_PROCESS_QUERY_LIMITED_INFORMATION 0x1000
-#endif
-#define	Z	"I"
-#else
-#define THREAD_RET	void *
-#define THREAD_CREATE(thr,start,arg)	pthread_create(&thr,NULL,start,arg)
-#define THREAD_FINISH(thr)	pthread_join(thr,NULL)
-#define	Z	"z"			/**< printf format modifier for size_t */
-
-	/** For MDB_LOCK_FORMAT: True if readers take a pid lock in the lockfile */
-#define MDB_PIDLOCK			1
-
-#ifdef MDB_USE_POSIX_SEM
-
-typedef sem_t *mdb_mutex_t, *mdb_mutexref_t;
-#define LOCK_MUTEX0(mutex)		mdb_sem_wait(mutex)
-#define UNLOCK_MUTEX(mutex)		sem_post(mutex)
-
-static int
-mdb_sem_wait(sem_t *sem)
-{
-   int rc;
-   while ((rc = sem_wait(sem)) && (rc = errno) == EINTR) ;
-   return rc;
-}
-
-#else	/* MDB_USE_POSIX_MUTEX: */
-	/** Shared mutex/semaphore as the original is stored.
-	 *
-	 *	Not for copies.  Instead it can be assigned to an #mdb_mutexref_t.
-	 *	When mdb_mutexref_t is a pointer and mdb_mutex_t is not, then it
-	 *	is array[size 1] so it can be assigned to the pointer.
-	 */
-typedef pthread_mutex_t mdb_mutex_t[1];
-	/** Reference to an #mdb_mutex_t */
-typedef pthread_mutex_t *mdb_mutexref_t;
-	/** Lock the reader or writer mutex.
-	 *	Returns 0 or a code to give #mdb_mutex_failed(), as in #LOCK_MUTEX().
-	 */
-#define LOCK_MUTEX0(mutex)	pthread_mutex_lock(mutex)
-	/** Unlock the reader or writer mutex.
-	 */
-#define UNLOCK_MUTEX(mutex)	pthread_mutex_unlock(mutex)
-	/** Mark mutex-protected data as repaired, after death of previous owner.
-	 */
-#define mdb_mutex_consistent(mutex)	pthread_mutex_consistent(mutex)
-#endif	/* MDB_USE_POSIX_SEM */
-
-	/** Get the error code for the last failed system function.
-	 */
-#define	ErrCode()	errno
-
-	/** An abstraction for a file handle.
-	 *	On POSIX systems file handles are small integers. On Windows
-	 *	they're opaque pointers.
-	 */
-#define	HANDLE	int
-
-	/**	A value for an invalid file handle.
-	 *	Mainly used to initialize file variables and signify that they are
-	 *	unused.
-	 */
-#define INVALID_HANDLE_VALUE	(-1)
-
-	/** Get the size of a memory page for the system.
-	 *	This is the basic size that the platform's memory manager uses, and is
-	 *	fundamental to the use of memory-mapped files.
-	 */
-#define	GET_PAGESIZE(x)	((x) = sysconf(_SC_PAGE_SIZE))
-#endif
-
-#if defined(_WIN32) || defined(MDB_USE_POSIX_SEM)
-#define MNAME_LEN	32
-#else
-#define MNAME_LEN	(sizeof(pthread_mutex_t))
-#endif
-
-/** @} */
-
-#ifdef MDB_ROBUST_SUPPORTED
-	/** Lock mutex, handle any error, set rc = result.
-	 *	Return 0 on success, nonzero (not rc) on error.
-	 */
-#define LOCK_MUTEX(rc, env, mutex) \
-	(((rc) = LOCK_MUTEX0(mutex)) && \
-	 ((rc) = mdb_mutex_failed(env, mutex, rc)))
-static int mdb_mutex_failed(MDB_env *env, mdb_mutexref_t mutex, int rc);
-#else
-#define LOCK_MUTEX(rc, env, mutex) ((rc) = LOCK_MUTEX0(mutex))
-#define mdb_mutex_failed(env, mutex, rc) (rc)
-#endif
-
-#ifndef _WIN32
-/**	A flag for opening a file and requesting synchronous data writes.
- *	This is only used when writing a meta page. It's not strictly needed;
- *	we could just do a normal write and then immediately perform a flush.
- *	But if this flag is available it saves us an extra system call.
- *
- *	@note If O_DSYNC is undefined but exists in /usr/include,
- * preferably set some compiler flag to get the definition.
- */
-#ifndef MDB_DSYNC
-# ifdef O_DSYNC
-# define MDB_DSYNC	O_DSYNC
-# else
-# define MDB_DSYNC	O_SYNC
-# endif
-#endif
-#endif
-
-/** Function for flushing the data of a file. Define this to fsync
- *	if fdatasync() is not supported.
- */
-#ifndef MDB_FDATASYNC
-# define MDB_FDATASYNC	fdatasync
-#endif
-
-#ifndef MDB_MSYNC
-# define MDB_MSYNC(addr,len,flags)	msync(addr,len,flags)
-#endif
-
-#ifndef MS_SYNC
-#define	MS_SYNC	1
-#endif
-
-#ifndef MS_ASYNC
-#define	MS_ASYNC	0
-#endif
-
-	/** A page number in the database.
-	 *	Note that 64 bit page numbers are overkill, since pages themselves
-	 *	already represent 12-13 bits of addressable memory, and the OS will
-	 *	always limit applications to a maximum of 63 bits of address space.
-	 *
-	 *	@note In the #MDB_node structure, we only store 48 bits of this value,
-	 *	which thus limits us to only 60 bits of addressable data.
-	 */
-typedef MDB_ID	pgno_t;
-
-	/** A transaction ID.
-	 *	See struct MDB_txn.mt_txnid for details.
-	 */
-typedef MDB_ID	txnid_t;
-
-/** @defgroup debug	Debug Macros
- *	@{
- */
-#ifndef MDB_DEBUG
-	/**	Enable debug output.  Needs variable argument macros (a C99 feature).
-	 *	Set this to 1 for copious tracing. Set to 2 to add dumps of all IDLs
-	 *	read from and written to the database (used for free space management).
-	 */
-#define MDB_DEBUG 0
-#endif
-
-#if MDB_DEBUG
-static int mdb_debug;
-static txnid_t mdb_debug_start;
-
-	/**	Print a debug message with printf formatting.
-	 *	Requires double parenthesis around 2 or more args.
-	 */
-# define DPRINTF(args) ((void) ((mdb_debug) && DPRINTF0 args))
-# define DPRINTF0(fmt, ...) \
-	fprintf(stderr, "%s:%d " fmt "\n", mdb_func_, __LINE__, __VA_ARGS__)
-#else
-# define DPRINTF(args)	((void) 0)
-#endif
-	/**	Print a debug string.
-	 *	The string is printed literally, with no format processing.
-	 */
-#define DPUTS(arg)	DPRINTF(("%s", arg))
-	/** Debuging output value of a cursor DBI: Negative in a sub-cursor. */
-#define DDBI(mc) \
-	(((mc)->mc_flags & C_SUB) ? -(int)(mc)->mc_dbi : (int)(mc)->mc_dbi)
-/** @} */
-
-	/**	@brief The maximum size of a database page.
-	 *
-	 *	It is 32k or 64k, since value-PAGEBASE must fit in
-	 *	#MDB_page.%mp_upper.
-	 *
-	 *	LMDB will use database pages < OS pages if needed.
-	 *	That causes more I/O in write transactions: The OS must
-	 *	know (read) the whole page before writing a partial page.
-	 *
-	 *	Note that we don't currently support Huge pages. On Linux,
-	 *	regular data files cannot use Huge pages, and in general
-	 *	Huge pages aren't actually pageable. We rely on the OS
-	 *	demand-pager to read our data and page it out when memory
-	 *	pressure from other processes is high. So until OSs have
-	 *	actual paging support for Huge pages, they're not viable.
-	 */
-#define MAX_PAGESIZE	 (PAGEBASE ? 0x10000 : 0x8000)
-
-	/** The minimum number of keys required in a database page.
-	 *	Setting this to a larger value will place a smaller bound on the
-	 *	maximum size of a data item. Data items larger than this size will
-	 *	be pushed into overflow pages instead of being stored directly in
-	 *	the B-tree node. This value used to default to 4. With a page size
-	 *	of 4096 bytes that meant that any item larger than 1024 bytes would
-	 *	go into an overflow page. That also meant that on average 2-3KB of
-	 *	each overflow page was wasted space. The value cannot be lower than
-	 *	2 because then there would no longer be a tree structure. With this
-	 *	value, items larger than 2KB will go into overflow pages, and on
-	 *	average only 1KB will be wasted.
-	 */
-#define MDB_MINKEYS	 2
-
-	/**	A stamp that identifies a file as an LMDB file.
-	 *	There's nothing special about this value other than that it is easily
-	 *	recognizable, and it will reflect any byte order mismatches.
-	 */
-#define MDB_MAGIC	 0xBEEFC0DE
-
-	/**	The version number for a database's datafile format. */
-#define MDB_DATA_VERSION	 ((MDB_DEVEL) ? 999 : 1)
-	/**	The version number for a database's lockfile format. */
-#define MDB_LOCK_VERSION	 1
-
-	/**	@brief The max size of a key we can write, or 0 for computed max.
-	 *
-	 *	This macro should normally be left alone or set to 0.
-	 *	Note that a database with big keys or dupsort data cannot be
-	 *	reliably modified by a liblmdb which uses a smaller max.
-	 *	The default is 511 for backwards compat, or 0 when #MDB_DEVEL.
-	 *
-	 *	Other values are allowed, for backwards compat.  However:
-	 *	A value bigger than the computed max can break if you do not
-	 *	know what you are doing, and liblmdb <= 0.9.10 can break when
-	 *	modifying a DB with keys/dupsort data bigger than its max.
-	 *
-	 *	Data items in an #MDB_DUPSORT database are also limited to
-	 *	this size, since they're actually keys of a sub-DB.  Keys and
-	 *	#MDB_DUPSORT data items must fit on a node in a regular page.
-	 */
-#ifndef MDB_MAXKEYSIZE
-#define MDB_MAXKEYSIZE	 ((MDB_DEVEL) ? 0 : 511)
-#endif
-
-	/**	The maximum size of a key we can write to the environment. */
-#if MDB_MAXKEYSIZE
-#define ENV_MAXKEY(env)	(MDB_MAXKEYSIZE)
-#else
-#define ENV_MAXKEY(env)	((env)->me_maxkey)
-#endif
-
-	/**	@brief The maximum size of a data item.
-	 *
-	 *	We only store a 32 bit value for node sizes.
-	 */
-#define MAXDATASIZE	0xffffffffUL
-
-#if MDB_DEBUG
-	/**	Key size which fits in a #DKBUF.
-	 *	@ingroup debug
-	 */
-#define DKBUF_MAXKEYSIZE ((MDB_MAXKEYSIZE) > 0 ? (MDB_MAXKEYSIZE) : 511)
-	/**	A key buffer.
-	 *	@ingroup debug
-	 *	This is used for printing a hex dump of a key's contents.
-	 */
-#define DKBUF	char kbuf[DKBUF_MAXKEYSIZE*2+1]
-	/**	Display a key in hex.
-	 *	@ingroup debug
-	 *	Invoke a function to display a key in hex.
-	 */
-#define	DKEY(x)	mdb_dkey(x, kbuf)
-#else
-#define	DKBUF
-#define DKEY(x)	0
-#endif
-
-	/** An invalid page number.
-	 *	Mainly used to denote an empty tree.
-	 */
-#define P_INVALID	 (~(pgno_t)0)
-
-	/** Test if the flags \b f are set in a flag word \b w. */
-#define F_ISSET(w, f)	 (((w) & (f)) == (f))
-
-	/** Round \b n up to an even number. */
-#define EVEN(n)		(((n) + 1U) & -2) /* sign-extending -2 to match n+1U */
-
-	/**	Used for offsets within a single page.
-	 *	Since memory pages are typically 4 or 8KB in size, 12-13 bits,
-	 *	this is plenty.
-	 */
-typedef uint16_t	 indx_t;
-
-	/**	Default size of memory map.
-	 *	This is certainly too small for any actual applications. Apps should always set
-	 *	the size explicitly using #mdb_env_set_mapsize().
-	 */
-#define DEFAULT_MAPSIZE	1048576
-
-/**	@defgroup readers	Reader Lock Table
- *	Readers don't acquire any locks for their data access. Instead, they
- *	simply record their transaction ID in the reader table. The reader
- *	mutex is needed just to find an empty slot in the reader table. The
- *	slot's address is saved in thread-specific data so that subsequent read
- *	transactions started by the same thread need no further locking to proceed.
- *
- *	If #MDB_NOTLS is set, the slot address is not saved in thread-specific data.
- *
- *	No reader table is used if the database is on a read-only filesystem, or
- *	if #MDB_NOLOCK is set.
- *
- *	Since the database uses multi-version concurrency control, readers don't
- *	actually need any locking. This table is used to keep track of which
- *	readers are using data from which old transactions, so that we'll know
- *	when a particular old transaction is no longer in use. Old transactions
- *	that have discarded any data pages can then have those pages reclaimed
- *	for use by a later write transaction.
- *
- *	The lock table is constructed such that reader slots are aligned with the
- *	processor's cache line size. Any slot is only ever used by one thread.
- *	This alignment guarantees that there will be no contention or cache
- *	thrashing as threads update their own slot info, and also eliminates
- *	any need for locking when accessing a slot.
- *
- *	A writer thread will scan every slot in the table to determine the oldest
- *	outstanding reader transaction. Any freed pages older than this will be
- *	reclaimed by the writer. The writer doesn't use any locks when scanning
- *	this table. This means that there's no guarantee that the writer will
- *	see the most up-to-date reader info, but that's not required for correct
- *	operation - all we need is to know the upper bound on the oldest reader,
- *	we don't care at all about the newest reader. So the only consequence of
- *	reading stale information here is that old pages might hang around a
- *	while longer before being reclaimed. That's actually good anyway, because
- *	the longer we delay reclaiming old pages, the more likely it is that a
- *	string of contiguous pages can be found after coalescing old pages from
- *	many old transactions together.
- *	@{
- */
-	/**	Number of slots in the reader table.
-	 *	This value was chosen somewhat arbitrarily. 126 readers plus a
-	 *	couple mutexes fit exactly into 8KB on my development machine.
-	 *	Applications should set the table size using #mdb_env_set_maxreaders().
-	 */
-#define DEFAULT_READERS	126
-
-	/**	The size of a CPU cache line in bytes. We want our lock structures
-	 *	aligned to this size to avoid false cache line sharing in the
-	 *	lock table.
-	 *	This value works for most CPUs. For Itanium this should be 128.
-	 */
-#ifndef CACHELINE
-#define CACHELINE	64
-#endif
-
-	/**	The information we store in a single slot of the reader table.
-	 *	In addition to a transaction ID, we also record the process and
-	 *	thread ID that owns a slot, so that we can detect stale information,
-	 *	e.g. threads or processes that went away without cleaning up.
-	 *	@note We currently don't check for stale records. We simply re-init
-	 *	the table when we know that we're the only process opening the
-	 *	lock file.
-	 */
-typedef struct MDB_rxbody {
-	/**	Current Transaction ID when this transaction began, or (txnid_t)-1.
-	 *	Multiple readers that start at the same time will probably have the
-	 *	same ID here. Again, it's not important to exclude them from
-	 *	anything; all we need to know is which version of the DB they
-	 *	started from so we can avoid overwriting any data used in that
-	 *	particular version.
-	 */
-	volatile txnid_t		mrb_txnid;
-	/** The process ID of the process owning this reader txn. */
-	volatile MDB_PID_T	mrb_pid;
-	/** The thread ID of the thread owning this txn. */
-	volatile MDB_THR_T	mrb_tid;
-} MDB_rxbody;
-
-	/** The actual reader record, with cacheline padding. */
-typedef struct MDB_reader {
-	union {
-		MDB_rxbody mrx;
-		/** shorthand for mrb_txnid */
-#define	mr_txnid	mru.mrx.mrb_txnid
-#define	mr_pid	mru.mrx.mrb_pid
-#define	mr_tid	mru.mrx.mrb_tid
-		/** cache line alignment */
-		char pad[(sizeof(MDB_rxbody)+CACHELINE-1) & ~(CACHELINE-1)];
-	} mru;
-} MDB_reader;
-
-	/** The header for the reader table.
-	 *	The table resides in a memory-mapped file. (This is a different file
-	 *	than is used for the main database.)
-	 *
-	 *	For POSIX the actual mutexes reside in the shared memory of this
-	 *	mapped file. On Windows, mutexes are named objects allocated by the
-	 *	kernel; we store the mutex names in this mapped file so that other
-	 *	processes can grab them. This same approach is also used on
-	 *	MacOSX/Darwin (using named semaphores) since MacOSX doesn't support
-	 *	process-shared POSIX mutexes. For these cases where a named object
-	 *	is used, the object name is derived from a 64 bit FNV hash of the
-	 *	environment pathname. As such, naming collisions are extremely
-	 *	unlikely. If a collision occurs, the results are unpredictable.
-	 */
-typedef struct MDB_txbody {
-		/** Stamp identifying this as an LMDB file. It must be set
-		 *	to #MDB_MAGIC. */
-	uint32_t	mtb_magic;
-		/** Format of this lock file. Must be set to #MDB_LOCK_FORMAT. */
-	uint32_t	mtb_format;
-#if defined(_WIN32) || defined(MDB_USE_POSIX_SEM)
-	char	mtb_rmname[MNAME_LEN];
-#else
-		/** Mutex protecting access to this table.
-		 *	This is the reader table lock used with LOCK_MUTEX().
-		 */
-	mdb_mutex_t	mtb_rmutex;
-#endif
-		/**	The ID of the last transaction committed to the database.
-		 *	This is recorded here only for convenience; the value can always
-		 *	be determined by reading the main database meta pages.
-		 */
-	volatile txnid_t		mtb_txnid;
-		/** The number of slots that have been used in the reader table.
-		 *	This always records the maximum count, it is not decremented
-		 *	when readers release their slots.
-		 */
-	volatile unsigned	mtb_numreaders;
-} MDB_txbody;
-
-	/** The actual reader table definition. */
-typedef struct MDB_txninfo {
-	union {
-		MDB_txbody mtb;
-#define mti_magic	mt1.mtb.mtb_magic
-#define mti_format	mt1.mtb.mtb_format
-#define mti_rmutex	mt1.mtb.mtb_rmutex
-#define mti_rmname	mt1.mtb.mtb_rmname
-#define mti_txnid	mt1.mtb.mtb_txnid
-#define mti_numreaders	mt1.mtb.mtb_numreaders
-		char pad[(sizeof(MDB_txbody)+CACHELINE-1) & ~(CACHELINE-1)];
-	} mt1;
-	union {
-#if defined(_WIN32) || defined(MDB_USE_POSIX_SEM)
-		char mt2_wmname[MNAME_LEN];
-#define	mti_wmname	mt2.mt2_wmname
-#else
-		mdb_mutex_t	mt2_wmutex;
-#define mti_wmutex	mt2.mt2_wmutex
-#endif
-		char pad[(MNAME_LEN+CACHELINE-1) & ~(CACHELINE-1)];
-	} mt2;
-	MDB_reader	mti_readers[1];
-} MDB_txninfo;
-
-	/** Lockfile format signature: version, features and field layout */
-#define MDB_LOCK_FORMAT \
-	((uint32_t) \
-	 ((MDB_LOCK_VERSION) \
-	  /* Flags which describe functionality */ \
-	  + (((MDB_PIDLOCK) != 0) << 16)))
-/** @} */
-
-/** Common header for all page types. The page type depends on #mp_flags.
- *
- * #P_BRANCH and #P_LEAF pages have unsorted '#MDB_node's at the end, with
- * sorted #mp_ptrs[] entries referring to them. Exception: #P_LEAF2 pages
- * omit mp_ptrs and pack sorted #MDB_DUPFIXED values after the page header.
- *
- * #P_OVERFLOW records occupy one or more contiguous pages where only the
- * first has a page header. They hold the real data of #F_BIGDATA nodes.
- *
- * #P_SUBP sub-pages are small leaf "pages" with duplicate data.
- * A node with flag #F_DUPDATA but not #F_SUBDATA contains a sub-page.
- * (Duplicate data can also go in sub-databases, which use normal pages.)
- *
- * #P_META pages contain #MDB_meta, the start point of an LMDB snapshot.
- *
- * Each non-metapage up to #MDB_meta.%mm_last_pg is reachable exactly once
- * in the snapshot: Either used by a database or listed in a freeDB record.
- */
-typedef struct MDB_page {
-#define	mp_pgno	mp_p.p_pgno
-#define	mp_next	mp_p.p_next
-	union {
-		pgno_t		p_pgno;	/**< page number */
-		struct MDB_page *p_next; /**< for in-memory list of freed pages */
-	} mp_p;
-	uint16_t	mp_pad;			/**< key size if this is a LEAF2 page */
-/**	@defgroup mdb_page	Page Flags
- *	@ingroup internal
- *	Flags for the page headers.
- *	@{
- */
-#define	P_BRANCH	 0x01		/**< branch page */
-#define	P_LEAF		 0x02		/**< leaf page */
-#define	P_OVERFLOW	 0x04		/**< overflow page */
-#define	P_META		 0x08		/**< meta page */
-#define	P_DIRTY		 0x10		/**< dirty page, also set for #P_SUBP pages */
-#define	P_LEAF2		 0x20		/**< for #MDB_DUPFIXED records */
-#define	P_SUBP		 0x40		/**< for #MDB_DUPSORT sub-pages */
-#define	P_LOOSE		 0x4000		/**< page was dirtied then freed, can be reused */
-#define	P_KEEP		 0x8000		/**< leave this page alone during spill */
-/** @} */
-	uint16_t	mp_flags;		/**< @ref mdb_page */
-#define mp_lower	mp_pb.pb.pb_lower
-#define mp_upper	mp_pb.pb.pb_upper
-#define mp_pages	mp_pb.pb_pages
-	union {
-		struct {
-			indx_t		pb_lower;		/**< lower bound of free space */
-			indx_t		pb_upper;		/**< upper bound of free space */
-		} pb;
-		uint32_t	pb_pages;	/**< number of overflow pages */
-	} mp_pb;
-	indx_t		mp_ptrs[1];		/**< dynamic size */
-} MDB_page;
-
-	/** Size of the page header, excluding dynamic data at the end */
-#define PAGEHDRSZ	 ((unsigned) offsetof(MDB_page, mp_ptrs))
-
-	/** Address of first usable data byte in a page, after the header */
-#define METADATA(p)	 ((void *)((char *)(p) + PAGEHDRSZ))
-
-	/** ITS#7713, change PAGEBASE to handle 65536 byte pages */
-#define	PAGEBASE	((MDB_DEVEL) ? PAGEHDRSZ : 0)
-
-	/** Number of nodes on a page */
-#define NUMKEYS(p)	 (((p)->mp_lower - (PAGEHDRSZ-PAGEBASE)) >> 1)
-
-	/** The amount of space remaining in the page */
-#define SIZELEFT(p)	 (indx_t)((p)->mp_upper - (p)->mp_lower)
-
-	/** The percentage of space used in the page, in tenths of a percent. */
-#define PAGEFILL(env, p) (1000L * ((env)->me_psize - PAGEHDRSZ - SIZELEFT(p)) / \
-				((env)->me_psize - PAGEHDRSZ))
-	/** The minimum page fill factor, in tenths of a percent.
-	 *	Pages emptier than this are candidates for merging.
-	 */
-#define FILL_THRESHOLD	 250
-
-	/** Test if a page is a leaf page */
-#define IS_LEAF(p)	 F_ISSET((p)->mp_flags, P_LEAF)
-	/** Test if a page is a LEAF2 page */
-#define IS_LEAF2(p)	 F_ISSET((p)->mp_flags, P_LEAF2)
-	/** Test if a page is a branch page */
-#define IS_BRANCH(p)	 F_ISSET((p)->mp_flags, P_BRANCH)
-	/** Test if a page is an overflow page */
-#define IS_OVERFLOW(p)	 F_ISSET((p)->mp_flags, P_OVERFLOW)
-	/** Test if a page is a sub page */
-#define IS_SUBP(p)	 F_ISSET((p)->mp_flags, P_SUBP)
-
-	/** The number of overflow pages needed to store the given size. */
-#define OVPAGES(size, psize)	((PAGEHDRSZ-1 + (size)) / (psize) + 1)
-
-	/** Link in #MDB_txn.%mt_loose_pgs list.
-	 *  Kept outside the page header, which is needed when reusing the page.
-	 */
-#define NEXT_LOOSE_PAGE(p)		(*(MDB_page **)((p) + 2))
-
-	/** Header for a single key/data pair within a page.
-	 * Used in pages of type #P_BRANCH and #P_LEAF without #P_LEAF2.
-	 * We guarantee 2-byte alignment for 'MDB_node's.
-	 *
-	 * #mn_lo and #mn_hi are used for data size on leaf nodes, and for child
-	 * pgno on branch nodes.  On 64 bit platforms, #mn_flags is also used
-	 * for pgno.  (Branch nodes have no flags).  Lo and hi are in host byte
-	 * order in case some accesses can be optimized to 32-bit word access.
-	 *
-	 * Leaf node flags describe node contents.  #F_BIGDATA says the node's
-	 * data part is the page number of an overflow page with actual data.
-	 * #F_DUPDATA and #F_SUBDATA can be combined giving duplicate data in
-	 * a sub-page/sub-database, and named databases (just #F_SUBDATA).
-	 */
-typedef struct MDB_node {
-	/** part of data size or pgno
-	 *	@{ */
-#if BYTE_ORDER == LITTLE_ENDIAN
-	unsigned short	mn_lo, mn_hi;
-#else
-	unsigned short	mn_hi, mn_lo;
-#endif
-	/** @} */
-/** @defgroup mdb_node Node Flags
- *	@ingroup internal
- *	Flags for node headers.
- *	@{
- */
-#define F_BIGDATA	 0x01			/**< data put on overflow page */
-#define F_SUBDATA	 0x02			/**< data is a sub-database */
-#define F_DUPDATA	 0x04			/**< data has duplicates */
-
-/** valid flags for #mdb_node_add() */
-#define	NODE_ADD_FLAGS	(F_DUPDATA|F_SUBDATA|MDB_RESERVE|MDB_APPEND)
-
-/** @} */
-	unsigned short	mn_flags;		/**< @ref mdb_node */
-	unsigned short	mn_ksize;		/**< key size */
-	char		mn_data[1];			/**< key and data are appended here */
-} MDB_node;
-
-	/** Size of the node header, excluding dynamic data at the end */
-#define NODESIZE	 offsetof(MDB_node, mn_data)
-
-	/** Bit position of top word in page number, for shifting mn_flags */
-#define PGNO_TOPWORD ((pgno_t)-1 > 0xffffffffu ? 32 : 0)
-
-	/** Size of a node in a branch page with a given key.
-	 *	This is just the node header plus the key, there is no data.
-	 */
-#define INDXSIZE(k)	 (NODESIZE + ((k) == NULL ? 0 : (k)->mv_size))
-
-	/** Size of a node in a leaf page with a given key and data.
-	 *	This is node header plus key plus data size.
-	 */
-#define LEAFSIZE(k, d)	 (NODESIZE + (k)->mv_size + (d)->mv_size)
-
-	/** Address of node \b i in page \b p */
-#define NODEPTR(p, i)	 ((MDB_node *)((char *)(p) + (p)->mp_ptrs[i] + PAGEBASE))
-
-	/** Address of the key for the node */
-#define NODEKEY(node)	 (void *)((node)->mn_data)
-
-	/** Address of the data for a node */
-#define NODEDATA(node)	 (void *)((char *)(node)->mn_data + (node)->mn_ksize)
-
-	/** Get the page number pointed to by a branch node */
-#define NODEPGNO(node) \
-	((node)->mn_lo | ((pgno_t) (node)->mn_hi << 16) | \
-	 (PGNO_TOPWORD ? ((pgno_t) (node)->mn_flags << PGNO_TOPWORD) : 0))
-	/** Set the page number in a branch node */
-#define SETPGNO(node,pgno)	do { \
-	(node)->mn_lo = (pgno) & 0xffff; (node)->mn_hi = (pgno) >> 16; \
-	if (PGNO_TOPWORD) (node)->mn_flags = (pgno) >> PGNO_TOPWORD; } while(0)
-
-	/** Get the size of the data in a leaf node */
-#define NODEDSZ(node)	 ((node)->mn_lo | ((unsigned)(node)->mn_hi << 16))
-	/** Set the size of the data for a leaf node */
-#define SETDSZ(node,size)	do { \
-	(node)->mn_lo = (size) & 0xffff; (node)->mn_hi = (size) >> 16;} while(0)
-	/** The size of a key in a node */
-#define NODEKSZ(node)	 ((node)->mn_ksize)
-
-	/** Copy a page number from src to dst */
-#ifdef MISALIGNED_OK
-#define COPY_PGNO(dst,src)	dst = src
-#else
-#if SIZE_MAX > 4294967295UL
-#define COPY_PGNO(dst,src)	do { \
-	unsigned short *s, *d;	\
-	s = (unsigned short *)&(src);	\
-	d = (unsigned short *)&(dst);	\
-	*d++ = *s++;	\
-	*d++ = *s++;	\
-	*d++ = *s++;	\
-	*d = *s;	\
-} while (0)
-#else
-#define COPY_PGNO(dst,src)	do { \
-	unsigned short *s, *d;	\
-	s = (unsigned short *)&(src);	\
-	d = (unsigned short *)&(dst);	\
-	*d++ = *s++;	\
-	*d = *s;	\
-} while (0)
-#endif
-#endif
-	/** The address of a key in a LEAF2 page.
-	 *	LEAF2 pages are used for #MDB_DUPFIXED sorted-duplicate sub-DBs.
-	 *	There are no node headers, keys are stored contiguously.
-	 */
-#define LEAF2KEY(p, i, ks)	((char *)(p) + PAGEHDRSZ + ((i)*(ks)))
-
-	/** Set the \b node's key into \b keyptr, if requested. */
-#define MDB_GET_KEY(node, keyptr)	{ if ((keyptr) != NULL) { \
-	(keyptr)->mv_size = NODEKSZ(node); (keyptr)->mv_data = NODEKEY(node); } }
-
-	/** Set the \b node's key into \b key. */
-#define MDB_GET_KEY2(node, key)	{ key.mv_size = NODEKSZ(node); key.mv_data = NODEKEY(node); }
-
-	/** Information about a single database in the environment. */
-typedef struct MDB_db {
-	uint32_t	md_pad;		/**< also ksize for LEAF2 pages */
-	uint16_t	md_flags;	/**< @ref mdb_dbi_open */
-	uint16_t	md_depth;	/**< depth of this tree */
-	pgno_t		md_branch_pages;	/**< number of internal pages */
-	pgno_t		md_leaf_pages;		/**< number of leaf pages */
-	pgno_t		md_overflow_pages;	/**< number of overflow pages */
-	size_t		md_entries;		/**< number of data items */
-	pgno_t		md_root;		/**< the root page of this tree */
-} MDB_db;
-
-#define MDB_VALID	0x8000		/**< DB handle is valid, for me_dbflags */
-#define PERSISTENT_FLAGS	(0xffff & ~(MDB_VALID))
-	/** #mdb_dbi_open() flags */
-#define VALID_FLAGS	(MDB_REVERSEKEY|MDB_DUPSORT|MDB_INTEGERKEY|MDB_DUPFIXED|\
-	MDB_INTEGERDUP|MDB_REVERSEDUP|MDB_CREATE)
-
-	/** Handle for the DB used to track free pages. */
-#define	FREE_DBI	0
-	/** Handle for the default DB. */
-#define	MAIN_DBI	1
-	/** Number of DBs in metapage (free and main) - also hardcoded elsewhere */
-#define CORE_DBS	2
-
-	/** Number of meta pages - also hardcoded elsewhere */
-#define NUM_METAS	2
-
-	/** Meta page content.
-	 *	A meta page is the start point for accessing a database snapshot.
-	 *	Pages 0-1 are meta pages. Transaction N writes meta page #(N % 2).
-	 */
-typedef struct MDB_meta {
-		/** Stamp identifying this as an LMDB file. It must be set
-		 *	to #MDB_MAGIC. */
-	uint32_t	mm_magic;
-		/** Version number of this file. Must be set to #MDB_DATA_VERSION. */
-	uint32_t	mm_version;
-	void		*mm_address;		/**< address for fixed mapping */
-	size_t		mm_mapsize;			/**< size of mmap region */
-	MDB_db		mm_dbs[CORE_DBS];	/**< first is free space, 2nd is main db */
-	/** The size of pages used in this DB */
-#define	mm_psize	mm_dbs[FREE_DBI].md_pad
-	/** Any persistent environment flags. @ref mdb_env */
-#define	mm_flags	mm_dbs[FREE_DBI].md_flags
-	/** Last used page in the datafile.
-	 *	Actually the file may be shorter if the freeDB lists the final pages.
-	 */
-	pgno_t		mm_last_pg;
-	volatile txnid_t	mm_txnid;	/**< txnid that committed this page */
-} MDB_meta;
-
-	/** Buffer for a stack-allocated meta page.
-	 *	The members define size and alignment, and silence type
-	 *	aliasing warnings.  They are not used directly; that could
-	 *	mean incorrectly using several union members in parallel.
-	 */
-typedef union MDB_metabuf {
-	MDB_page	mb_page;
-	struct {
-		char		mm_pad[PAGEHDRSZ];
-		MDB_meta	mm_meta;
-	} mb_metabuf;
-} MDB_metabuf;
-
-	/** Auxiliary DB info.
-	 *	The information here is mostly static/read-only. There is
-	 *	only a single copy of this record in the environment.
-	 */
-typedef struct MDB_dbx {
-	MDB_val		md_name;		/**< name of the database */
-	MDB_cmp_func	*md_cmp;	/**< function for comparing keys */
-	MDB_cmp_func	*md_dcmp;	/**< function for comparing data items */
-	MDB_rel_func	*md_rel;	/**< user relocate function */
-	void		*md_relctx;		/**< user-provided context for md_rel */
-} MDB_dbx;
-
-	/** A database transaction.
-	 *	Every operation requires a transaction handle.
-	 */
-struct MDB_txn {
-	MDB_txn		*mt_parent;		/**< parent of a nested txn */
-	/** Nested txn under this txn, set together with flag #MDB_TXN_HAS_CHILD */
-	MDB_txn		*mt_child;
-	pgno_t		mt_next_pgno;	/**< next unallocated page */
-	/** The ID of this transaction. IDs are integers incrementing from 1.
-	 *	Only committed write transactions increment the ID. If a transaction
-	 *	aborts, the ID may be re-used by the next writer.
-	 */
-	txnid_t		mt_txnid;
-	MDB_env		*mt_env;		/**< the DB environment */
-	/** The list of pages that became unused during this transaction.
-	 */
-	MDB_IDL		mt_free_pgs;
-	/** The list of loose pages that became unused and may be reused
-	 *	in this transaction, linked through #NEXT_LOOSE_PAGE(page).
-	 */
-	MDB_page	*mt_loose_pgs;
-	/** Number of loose pages (#mt_loose_pgs) */
-	int			mt_loose_count;
-	/** The sorted list of dirty pages we temporarily wrote to disk
-	 *	because the dirty list was full. page numbers in here are
-	 *	shifted left by 1, deleted slots have the LSB set.
-	 */
-	MDB_IDL		mt_spill_pgs;
-	union {
-		/** For write txns: Modified pages. Sorted when not MDB_WRITEMAP. */
-		MDB_ID2L	dirty_list;
-		/** For read txns: This thread/txn's reader table slot, or NULL. */
-		MDB_reader	*reader;
-	} mt_u;
-	/** Array of records for each DB known in the environment. */
-	MDB_dbx		*mt_dbxs;
-	/** Array of MDB_db records for each known DB */
-	MDB_db		*mt_dbs;
-	/** Array of sequence numbers for each DB handle */
-	unsigned int	*mt_dbiseqs;
-/** @defgroup mt_dbflag	Transaction DB Flags
- *	@ingroup internal
- * @{
- */
-#define DB_DIRTY	0x01		/**< DB was written in this txn */
-#define DB_STALE	0x02		/**< Named-DB record is older than txnID */
-#define DB_NEW		0x04		/**< Named-DB handle opened in this txn */
-#define DB_VALID	0x08		/**< DB handle is valid, see also #MDB_VALID */
-#define DB_USRVALID	0x10		/**< As #DB_VALID, but not set for #FREE_DBI */
-#define DB_DUPDATA	0x20		/**< DB is #MDB_DUPSORT data */
-/** @} */
-	/** In write txns, array of cursors for each DB */
-	MDB_cursor	**mt_cursors;
-	/** Array of flags for each DB */
-	unsigned char	*mt_dbflags;
-	/**	Number of DB records in use, or 0 when the txn is finished.
-	 *	This number only ever increments until the txn finishes; we
-	 *	don't decrement it when individual DB handles are closed.
-	 */
-	MDB_dbi		mt_numdbs;
-
-/** @defgroup mdb_txn	Transaction Flags
- *	@ingroup internal
- *	@{
- */
-	/** #mdb_txn_begin() flags */
-#define MDB_TXN_BEGIN_FLAGS	MDB_RDONLY
-#define MDB_TXN_RDONLY		MDB_RDONLY	/**< read-only transaction */
-	/* internal txn flags */
-#define MDB_TXN_WRITEMAP	MDB_WRITEMAP	/**< copy of #MDB_env flag in writers */
-#define MDB_TXN_FINISHED	0x01		/**< txn is finished or never began */
-#define MDB_TXN_ERROR		0x02		/**< txn is unusable after an error */
-#define MDB_TXN_DIRTY		0x04		/**< must write, even if dirty list is empty */
-#define MDB_TXN_SPILLS		0x08		/**< txn or a parent has spilled pages */
-#define MDB_TXN_HAS_CHILD	0x10		/**< txn has an #MDB_txn.%mt_child */
-	/** most operations on the txn are currently illegal */
-#define MDB_TXN_BLOCKED		(MDB_TXN_FINISHED|MDB_TXN_ERROR|MDB_TXN_HAS_CHILD)
-/** @} */
-	unsigned int	mt_flags;		/**< @ref mdb_txn */
-	/** #dirty_list room: Array size - \#dirty pages visible to this txn.
-	 *	Includes ancestor txns' dirty pages not hidden by other txns'
-	 *	dirty/spilled pages. Thus commit(nested txn) has room to merge
-	 *	dirty_list into mt_parent after freeing hidden mt_parent pages.
-	 */
-	unsigned int	mt_dirty_room;
-};
-
-/** Enough space for 2^32 nodes with minimum of 2 keys per node. I.e., plenty.
- * At 4 keys per node, enough for 2^64 nodes, so there's probably no need to
- * raise this on a 64 bit machine.
- */
-#define CURSOR_STACK		 32
-
-struct MDB_xcursor;
-
-	/** Cursors are used for all DB operations.
-	 *	A cursor holds a path of (page pointer, key index) from the DB
-	 *	root to a position in the DB, plus other state. #MDB_DUPSORT
-	 *	cursors include an xcursor to the current data item. Write txns
-	 *	track their cursors and keep them up to date when data moves.
-	 *	Exception: An xcursor's pointer to a #P_SUBP page can be stale.
-	 *	(A node with #F_DUPDATA but no #F_SUBDATA contains a subpage).
-	 */
-struct MDB_cursor {
-	/** Next cursor on this DB in this txn */
-	MDB_cursor	*mc_next;
-	/** Backup of the original cursor if this cursor is a shadow */
-	MDB_cursor	*mc_backup;
-	/** Context used for databases with #MDB_DUPSORT, otherwise NULL */
-	struct MDB_xcursor	*mc_xcursor;
-	/** The transaction that owns this cursor */
-	MDB_txn		*mc_txn;
-	/** The database handle this cursor operates on */
-	MDB_dbi		mc_dbi;
-	/** The database record for this cursor */
-	MDB_db		*mc_db;
-	/** The database auxiliary record for this cursor */
-	MDB_dbx		*mc_dbx;
-	/** The @ref mt_dbflag for this database */
-	unsigned char	*mc_dbflag;
-	unsigned short 	mc_snum;	/**< number of pushed pages */
-	unsigned short	mc_top;		/**< index of top page, normally mc_snum-1 */
-/** @defgroup mdb_cursor	Cursor Flags
- *	@ingroup internal
- *	Cursor state flags.
- *	@{
- */
-#define C_INITIALIZED	0x01	/**< cursor has been initialized and is valid */
-#define C_EOF	0x02			/**< No more data */
-#define C_SUB	0x04			/**< Cursor is a sub-cursor */
-#define C_DEL	0x08			/**< last op was a cursor_del */
-#define C_UNTRACK	0x40		/**< Un-track cursor when closing */
-/** @} */
-	unsigned int	mc_flags;	/**< @ref mdb_cursor */
-	MDB_page	*mc_pg[CURSOR_STACK];	/**< stack of pushed pages */
-	indx_t		mc_ki[CURSOR_STACK];	/**< stack of page indices */
-};
-
-	/** Context for sorted-dup records.
-	 *	We could have gone to a fully recursive design, with arbitrarily
-	 *	deep nesting of sub-databases. But for now we only handle these
-	 *	levels - main DB, optional sub-DB, sorted-duplicate DB.
-	 */
-typedef struct MDB_xcursor {
-	/** A sub-cursor for traversing the Dup DB */
-	MDB_cursor mx_cursor;
-	/** The database record for this Dup DB */
-	MDB_db	mx_db;
-	/**	The auxiliary DB record for this Dup DB */
-	MDB_dbx	mx_dbx;
-	/** The @ref mt_dbflag for this Dup DB */
-	unsigned char mx_dbflag;
-} MDB_xcursor;
-
-	/** Check if there is an inited xcursor */
-#define XCURSOR_INITED(mc) \
-	((mc)->mc_xcursor && ((mc)->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED))
-
-	/** Update the xcursor's sub-page pointer, if any, in \b mc.  Needed
-	 *	when the node which contains the sub-page may have moved.  Called
-	 *	with leaf page \b mp = mc->mc_pg[\b top].
-	 */
-#define XCURSOR_REFRESH(mc, top, mp) do { \
-	MDB_page *xr_pg = (mp); \
-	MDB_node *xr_node; \
-	if (!XCURSOR_INITED(mc) || (mc)->mc_ki[top] >= NUMKEYS(xr_pg)) break; \
-	xr_node = NODEPTR(xr_pg, (mc)->mc_ki[top]); \
-	if ((xr_node->mn_flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA) \
-		(mc)->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(xr_node); \
-} while (0)
-
-	/** State of FreeDB old pages, stored in the MDB_env */
-typedef struct MDB_pgstate {
-	pgno_t		*mf_pghead;	/**< Reclaimed freeDB pages, or NULL before use */
-	txnid_t		mf_pglast;	/**< ID of last used record, or 0 if !mf_pghead */
-} MDB_pgstate;
-
-	/** The database environment. */
-struct MDB_env {
-	HANDLE		me_fd;		/**< The main data file */
-	HANDLE		me_lfd;		/**< The lock file */
-	HANDLE		me_mfd;		/**< For writing and syncing the meta pages */
-	/** Failed to update the meta page. Probably an I/O error. */
-#define	MDB_FATAL_ERROR	0x80000000U
-	/** Some fields are initialized. */
-#define	MDB_ENV_ACTIVE	0x20000000U
-	/** me_txkey is set */
-#define	MDB_ENV_TXKEY	0x10000000U
-	/** fdatasync is unreliable */
-#define	MDB_FSYNCONLY	0x08000000U
-	uint32_t 	me_flags;		/**< @ref mdb_env */
-	unsigned int	me_psize;	/**< DB page size, inited from me_os_psize */
-	unsigned int	me_os_psize;	/**< OS page size, from #GET_PAGESIZE */
-	unsigned int	me_maxreaders;	/**< size of the reader table */
-	/** Max #MDB_txninfo.%mti_numreaders of interest to #mdb_env_close() */
-	volatile int	me_close_readers;
-	MDB_dbi		me_numdbs;		/**< number of DBs opened */
-	MDB_dbi		me_maxdbs;		/**< size of the DB table */
-	MDB_PID_T	me_pid;		/**< process ID of this env */
-	char		*me_path;		/**< path to the DB files */
-	char		*me_map;		/**< the memory map of the data file */
-	MDB_txninfo	*me_txns;		/**< the memory map of the lock file or NULL */
-	MDB_meta	*me_metas[NUM_METAS];	/**< pointers to the two meta pages */
-	void		*me_pbuf;		/**< scratch area for DUPSORT put() */
-	MDB_txn		*me_txn;		/**< current write transaction */
-	MDB_txn		*me_txn0;		/**< prealloc'd write transaction */
-	size_t		me_mapsize;		/**< size of the data memory map */
-	off_t		me_size;		/**< current file size */
-	pgno_t		me_maxpg;		/**< me_mapsize / me_psize */
-	MDB_dbx		*me_dbxs;		/**< array of static DB info */
-	uint16_t	*me_dbflags;	/**< array of flags from MDB_db.md_flags */
-	unsigned int	*me_dbiseqs;	/**< array of dbi sequence numbers */
-	pthread_key_t	me_txkey;	/**< thread-key for readers */
-	txnid_t		me_pgoldest;	/**< ID of oldest reader last time we looked */
-	MDB_pgstate	me_pgstate;		/**< state of old pages from freeDB */
-#	define		me_pglast	me_pgstate.mf_pglast
-#	define		me_pghead	me_pgstate.mf_pghead
-	MDB_page	*me_dpages;		/**< list of malloc'd blocks for re-use */
-	/** IDL of pages that became unused in a write txn */
-	MDB_IDL		me_free_pgs;
-	/** ID2L of pages written during a write txn. Length MDB_IDL_UM_SIZE. */
-	MDB_ID2L	me_dirty_list;
-	/** Max number of freelist items that can fit in a single overflow page */
-	int			me_maxfree_1pg;
-	/** Max size of a node on a page */
-	unsigned int	me_nodemax;
-#if !(MDB_MAXKEYSIZE)
-	unsigned int	me_maxkey;	/**< max size of a key */
-#endif
-	int		me_live_reader;		/**< have liveness lock in reader table */
-#ifdef _WIN32
-	int		me_pidquery;		/**< Used in OpenProcess */
-#endif
-#ifdef MDB_USE_POSIX_MUTEX	/* Posix mutexes reside in shared mem */
-#	define		me_rmutex	me_txns->mti_rmutex /**< Shared reader lock */
-#	define		me_wmutex	me_txns->mti_wmutex /**< Shared writer lock */
-#else
-	mdb_mutex_t	me_rmutex;
-	mdb_mutex_t	me_wmutex;
-#endif
-	void		*me_userctx;	 /**< User-settable context */
-	MDB_assert_func *me_assert_func; /**< Callback for assertion failures */
-};
-
-	/** Nested transaction */
-typedef struct MDB_ntxn {
-	MDB_txn		mnt_txn;		/**< the transaction */
-	MDB_pgstate	mnt_pgstate;	/**< parent transaction's saved freestate */
-} MDB_ntxn;
-
-	/** max number of pages to commit in one writev() call */
-#define MDB_COMMIT_PAGES	 64
-#if defined(IOV_MAX) && IOV_MAX < MDB_COMMIT_PAGES
-#undef MDB_COMMIT_PAGES
-#define MDB_COMMIT_PAGES	IOV_MAX
-#endif
-
-	/** max bytes to write in one call */
-#define MAX_WRITE		(0x40000000U >> (sizeof(ssize_t) == 4))
-
-	/** Check \b txn and \b dbi arguments to a function */
-#define TXN_DBI_EXIST(txn, dbi, validity) \
-	((txn) && (dbi)<(txn)->mt_numdbs && ((txn)->mt_dbflags[dbi] & (validity)))
-
-	/** Check for misused \b dbi handles */
-#define TXN_DBI_CHANGED(txn, dbi) \
-	((txn)->mt_dbiseqs[dbi] != (txn)->mt_env->me_dbiseqs[dbi])
-
-static int  mdb_page_alloc(MDB_cursor *mc, int num, MDB_page **mp);
-static int  mdb_page_new(MDB_cursor *mc, uint32_t flags, int num, MDB_page **mp);
-static int  mdb_page_touch(MDB_cursor *mc);
-
-#define MDB_END_NAMES {"committed", "empty-commit", "abort", "reset", \
-	"reset-tmp", "fail-begin", "fail-beginchild"}
-enum {
-	/* mdb_txn_end operation number, for logging */
-	MDB_END_COMMITTED, MDB_END_EMPTY_COMMIT, MDB_END_ABORT, MDB_END_RESET,
-	MDB_END_RESET_TMP, MDB_END_FAIL_BEGIN, MDB_END_FAIL_BEGINCHILD
-};
-#define MDB_END_OPMASK	0x0F	/**< mask for #mdb_txn_end() operation number */
-#define MDB_END_UPDATE	0x10	/**< update env state (DBIs) */
-#define MDB_END_FREE	0x20	/**< free txn unless it is #MDB_env.%me_txn0 */
-#define MDB_END_SLOT MDB_NOTLS	/**< release any reader slot if #MDB_NOTLS */
-static void mdb_txn_end(MDB_txn *txn, unsigned mode);
-
-static int  mdb_page_get(MDB_cursor *mc, pgno_t pgno, MDB_page **mp, int *lvl);
-static int  mdb_page_search_root(MDB_cursor *mc,
-			    MDB_val *key, int modify);
-#define MDB_PS_MODIFY	1
-#define MDB_PS_ROOTONLY	2
-#define MDB_PS_FIRST	4
-#define MDB_PS_LAST		8
-static int  mdb_page_search(MDB_cursor *mc,
-			    MDB_val *key, int flags);
-static int	mdb_page_merge(MDB_cursor *csrc, MDB_cursor *cdst);
-
-#define MDB_SPLIT_REPLACE	MDB_APPENDDUP	/**< newkey is not new */
-static int	mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata,
-				pgno_t newpgno, unsigned int nflags);
-
-static int  mdb_env_read_header(MDB_env *env, MDB_meta *meta);
-static MDB_meta *mdb_env_pick_meta(const MDB_env *env);
-static int  mdb_env_write_meta(MDB_txn *txn);
-#ifdef MDB_USE_POSIX_MUTEX /* Drop unused excl arg */
-# define mdb_env_close0(env, excl) mdb_env_close1(env)
-#endif
-static void mdb_env_close0(MDB_env *env, int excl);
-
-static MDB_node *mdb_node_search(MDB_cursor *mc, MDB_val *key, int *exactp);
-static int  mdb_node_add(MDB_cursor *mc, indx_t indx,
-			    MDB_val *key, MDB_val *data, pgno_t pgno, unsigned int flags);
-static void mdb_node_del(MDB_cursor *mc, int ksize);
-static void mdb_node_shrink(MDB_page *mp, indx_t indx);
-static int	mdb_node_move(MDB_cursor *csrc, MDB_cursor *cdst, int fromleft);
-static int  mdb_node_read(MDB_cursor *mc, MDB_node *leaf, MDB_val *data);
-static size_t	mdb_leaf_size(MDB_env *env, MDB_val *key, MDB_val *data);
-static size_t	mdb_branch_size(MDB_env *env, MDB_val *key);
-
-static int	mdb_rebalance(MDB_cursor *mc);
-static int	mdb_update_key(MDB_cursor *mc, MDB_val *key);
-
-static void	mdb_cursor_pop(MDB_cursor *mc);
-static int	mdb_cursor_push(MDB_cursor *mc, MDB_page *mp);
-
-static int	mdb_cursor_del0(MDB_cursor *mc);
-static int	mdb_del0(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data, unsigned flags);
-static int	mdb_cursor_sibling(MDB_cursor *mc, int move_right);
-static int	mdb_cursor_next(MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op);
-static int	mdb_cursor_prev(MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op);
-static int	mdb_cursor_set(MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op,
-				int *exactp);
-static int	mdb_cursor_first(MDB_cursor *mc, MDB_val *key, MDB_val *data);
-static int	mdb_cursor_last(MDB_cursor *mc, MDB_val *key, MDB_val *data);
-
-static void	mdb_cursor_init(MDB_cursor *mc, MDB_txn *txn, MDB_dbi dbi, MDB_xcursor *mx);
-static void	mdb_xcursor_init0(MDB_cursor *mc);
-static void	mdb_xcursor_init1(MDB_cursor *mc, MDB_node *node);
-static void	mdb_xcursor_init2(MDB_cursor *mc, MDB_xcursor *src_mx, int force);
-
-static int	mdb_drop0(MDB_cursor *mc, int subs);
-static void mdb_default_cmp(MDB_txn *txn, MDB_dbi dbi);
-static int mdb_reader_check0(MDB_env *env, int rlocked, int *dead);
-
-/** @cond */
-static MDB_cmp_func	mdb_cmp_memn, mdb_cmp_memnr, mdb_cmp_int, mdb_cmp_cint, mdb_cmp_long;
-/** @endcond */
-
-/** Compare two items pointing at size_t's of unknown alignment. */
-#ifdef MISALIGNED_OK
-# define mdb_cmp_clong mdb_cmp_long
-#else
-# define mdb_cmp_clong mdb_cmp_cint
-#endif
-
-#ifdef _WIN32
-static SECURITY_DESCRIPTOR mdb_null_sd;
-static SECURITY_ATTRIBUTES mdb_all_sa;
-static int mdb_sec_inited;
-
-struct MDB_name;
-static int utf8_to_utf16(const char *src, struct MDB_name *dst, int xtra);
-#endif
-
-/** Return the library version info. */
-char * ESECT
-mdb_version(int *major, int *minor, int *patch)
-{
-	if (major) *major = MDB_VERSION_MAJOR;
-	if (minor) *minor = MDB_VERSION_MINOR;
-	if (patch) *patch = MDB_VERSION_PATCH;
-	return MDB_VERSION_STRING;
-}
-
-/** Table of descriptions for LMDB @ref errors */
-static char *const mdb_errstr[] = {
-	"MDB_KEYEXIST: Key/data pair already exists",
-	"MDB_NOTFOUND: No matching key/data pair found",
-	"MDB_PAGE_NOTFOUND: Requested page not found",
-	"MDB_CORRUPTED: Located page was wrong type",
-	"MDB_PANIC: Update of meta page failed or environment had fatal error",
-	"MDB_VERSION_MISMATCH: Database environment version mismatch",
-	"MDB_INVALID: File is not an LMDB file",
-	"MDB_MAP_FULL: Environment mapsize limit reached",
-	"MDB_DBS_FULL: Environment maxdbs limit reached",
-	"MDB_READERS_FULL: Environment maxreaders limit reached",
-	"MDB_TLS_FULL: Thread-local storage keys full - too many environments open",
-	"MDB_TXN_FULL: Transaction has too many dirty pages - transaction too big",
-	"MDB_CURSOR_FULL: Internal error - cursor stack limit reached",
-	"MDB_PAGE_FULL: Internal error - page has no more space",
-	"MDB_MAP_RESIZED: Database contents grew beyond environment mapsize",
-	"MDB_INCOMPATIBLE: Operation and DB incompatible, or DB flags changed",
-	"MDB_BAD_RSLOT: Invalid reuse of reader locktable slot",
-	"MDB_BAD_TXN: Transaction must abort, has a child, or is invalid",
-	"MDB_BAD_VALSIZE: Unsupported size of key/DB name/data, or wrong DUPFIXED size",
-	"MDB_BAD_DBI: The specified DBI handle was closed/changed unexpectedly",
-};
-
-char *
-mdb_strerror(int err)
-{
-#ifdef _WIN32
-	/** HACK: pad 4KB on stack over the buf. Return system msgs in buf.
-	 *	This works as long as no function between the call to mdb_strerror
-	 *	and the actual use of the message uses more than 4K of stack.
-	 */
-#define MSGSIZE	1024
-#define PADSIZE	4096
-	char buf[MSGSIZE+PADSIZE], *ptr = buf;
-#endif
-	int i;
-	if (!err)
-		return ("Successful return: 0");
-
-	if (err >= MDB_KEYEXIST && err <= MDB_LAST_ERRCODE) {
-		i = err - MDB_KEYEXIST;
-		return mdb_errstr[i];
-	}
-
-#ifdef _WIN32
-	/* These are the C-runtime error codes we use. The comment indicates
-	 * their numeric value, and the Win32 error they would correspond to
-	 * if the error actually came from a Win32 API. A major mess, we should
-	 * have used LMDB-specific error codes for everything.
-	 */
-	switch(err) {
-	case ENOENT:	/* 2, FILE_NOT_FOUND */
-	case EIO:		/* 5, ACCESS_DENIED */
-	case ENOMEM:	/* 12, INVALID_ACCESS */
-	case EACCES:	/* 13, INVALID_DATA */
-	case EBUSY:		/* 16, CURRENT_DIRECTORY */
-	case EINVAL:	/* 22, BAD_COMMAND */
-	case ENOSPC:	/* 28, OUT_OF_PAPER */
-		return strerror(err);
-	default:
-		;
-	}
-	buf[0] = 0;
-	FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM |
-		FORMAT_MESSAGE_IGNORE_INSERTS,
-		NULL, err, 0, ptr, MSGSIZE, (va_list *)buf+MSGSIZE);
-	return ptr;
-#else
-	return strerror(err);
-#endif
-}
-
-/** assert(3) variant in cursor context */
-#define mdb_cassert(mc, expr)	mdb_assert0((mc)->mc_txn->mt_env, expr, #expr)
-/** assert(3) variant in transaction context */
-#define mdb_tassert(txn, expr)	mdb_assert0((txn)->mt_env, expr, #expr)
-/** assert(3) variant in environment context */
-#define mdb_eassert(env, expr)	mdb_assert0(env, expr, #expr)
-
-#ifndef NDEBUG
-# define mdb_assert0(env, expr, expr_txt) ((expr) ? (void)0 : \
-		mdb_assert_fail(env, expr_txt, mdb_func_, __FILE__, __LINE__))
-
-static void ESECT
-mdb_assert_fail(MDB_env *env, const char *expr_txt,
-	const char *func, const char *file, int line)
-{
-	char buf[400];
-	sprintf(buf, "%.100s:%d: Assertion '%.200s' failed in %.40s()",
-		file, line, expr_txt, func);
-	if (env->me_assert_func)
-		env->me_assert_func(env, buf);
-	fprintf(stderr, "%s\n", buf);
-	abort();
-}
-#else
-# define mdb_assert0(env, expr, expr_txt) ((void) 0)
-#endif /* NDEBUG */
-
-#if MDB_DEBUG
-/** Return the page number of \b mp which may be sub-page, for debug output */
-static pgno_t
-mdb_dbg_pgno(MDB_page *mp)
-{
-	pgno_t ret;
-	COPY_PGNO(ret, mp->mp_pgno);
-	return ret;
-}
-
-/** Display a key in hexadecimal and return the address of the result.
- * @param[in] key the key to display
- * @param[in] buf the buffer to write into. Should always be #DKBUF.
- * @return The key in hexadecimal form.
- */
-char *
-mdb_dkey(MDB_val *key, char *buf)
-{
-	char *ptr = buf;
-	unsigned char *c = key->mv_data;
-	unsigned int i;
-
-	if (!key)
-		return "";
-
-	if (key->mv_size > DKBUF_MAXKEYSIZE)
-		return "MDB_MAXKEYSIZE";
-	/* may want to make this a dynamic check: if the key is mostly
-	 * printable characters, print it as-is instead of converting to hex.
-	 */
-#if 1
-	buf[0] = '\0';
-	for (i=0; i<key->mv_size; i++)
-		ptr += sprintf(ptr, "%02x", *c++);
-#else
-	sprintf(buf, "%.*s", key->mv_size, key->mv_data);
-#endif
-	return buf;
-}
-
-static const char *
-mdb_leafnode_type(MDB_node *n)
-{
-	static char *const tp[2][2] = {{"", ": DB"}, {": sub-page", ": sub-DB"}};
-	return F_ISSET(n->mn_flags, F_BIGDATA) ? ": overflow page" :
-		tp[F_ISSET(n->mn_flags, F_DUPDATA)][F_ISSET(n->mn_flags, F_SUBDATA)];
-}
-
-/** Display all the keys in the page. */
-void
-mdb_page_list(MDB_page *mp)
-{
-	pgno_t pgno = mdb_dbg_pgno(mp);
-	const char *type, *state = (mp->mp_flags & P_DIRTY) ? ", dirty" : "";
-	MDB_node *node;
-	unsigned int i, nkeys, nsize, total = 0;
-	MDB_val key;
-	DKBUF;
-
-	switch (mp->mp_flags & (P_BRANCH|P_LEAF|P_LEAF2|P_META|P_OVERFLOW|P_SUBP)) {
-	case P_BRANCH:              type = "Branch page";		break;
-	case P_LEAF:                type = "Leaf page";			break;
-	case P_LEAF|P_SUBP:         type = "Sub-page";			break;
-	case P_LEAF|P_LEAF2:        type = "LEAF2 page";		break;
-	case P_LEAF|P_LEAF2|P_SUBP: type = "LEAF2 sub-page";	break;
-	case P_OVERFLOW:
-		fprintf(stderr, "Overflow page %"Z"u pages %u%s\n",
-			pgno, mp->mp_pages, state);
-		return;
-	case P_META:
-		fprintf(stderr, "Meta-page %"Z"u txnid %"Z"u\n",
-			pgno, ((MDB_meta *)METADATA(mp))->mm_txnid);
-		return;
-	default:
-		fprintf(stderr, "Bad page %"Z"u flags 0x%X\n", pgno, mp->mp_flags);
-		return;
-	}
-
-	nkeys = NUMKEYS(mp);
-	fprintf(stderr, "%s %"Z"u numkeys %d%s\n", type, pgno, nkeys, state);
-
-	for (i=0; i<nkeys; i++) {
-		if (IS_LEAF2(mp)) {	/* LEAF2 pages have no mp_ptrs[] or node headers */
-			key.mv_size = nsize = mp->mp_pad;
-			key.mv_data = LEAF2KEY(mp, i, nsize);
-			total += nsize;
-			fprintf(stderr, "key %d: nsize %d, %s\n", i, nsize, DKEY(&key));
-			continue;
-		}
-		node = NODEPTR(mp, i);
-		key.mv_size = node->mn_ksize;
-		key.mv_data = node->mn_data;
-		nsize = NODESIZE + key.mv_size;
-		if (IS_BRANCH(mp)) {
-			fprintf(stderr, "key %d: page %"Z"u, %s\n", i, NODEPGNO(node),
-				DKEY(&key));
-			total += nsize;
-		} else {
-			if (F_ISSET(node->mn_flags, F_BIGDATA))
-				nsize += sizeof(pgno_t);
-			else
-				nsize += NODEDSZ(node);
-			total += nsize;
-			nsize += sizeof(indx_t);
-			fprintf(stderr, "key %d: nsize %d, %s%s\n",
-				i, nsize, DKEY(&key), mdb_leafnode_type(node));
-		}
-		total = EVEN(total);
-	}
-	fprintf(stderr, "Total: header %d + contents %d + unused %d\n",
-		IS_LEAF2(mp) ? PAGEHDRSZ : PAGEBASE + mp->mp_lower, total, SIZELEFT(mp));
-}
-
-void
-mdb_cursor_chk(MDB_cursor *mc)
-{
-	unsigned int i;
-	MDB_node *node;
-	MDB_page *mp;
-
-	if (!mc->mc_snum || !(mc->mc_flags & C_INITIALIZED)) return;
-	for (i=0; i<mc->mc_top; i++) {
-		mp = mc->mc_pg[i];
-		node = NODEPTR(mp, mc->mc_ki[i]);
-		if (NODEPGNO(node) != mc->mc_pg[i+1]->mp_pgno)
-			printf("oops!\n");
-	}
-	if (mc->mc_ki[i] >= NUMKEYS(mc->mc_pg[i]))
-		printf("ack!\n");
-	if (XCURSOR_INITED(mc)) {
-		node = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]);
-		if (((node->mn_flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA) &&
-			mc->mc_xcursor->mx_cursor.mc_pg[0] != NODEDATA(node)) {
-			printf("blah!\n");
-		}
-	}
-}
-#endif
-
-#if (MDB_DEBUG) > 2
-/** Count all the pages in each DB and in the freelist
- *  and make sure it matches the actual number of pages
- *  being used.
- *  All named DBs must be open for a correct count.
- */
-static void mdb_audit(MDB_txn *txn)
-{
-	MDB_cursor mc;
-	MDB_val key, data;
-	MDB_ID freecount, count;
-	MDB_dbi i;
-	int rc;
-
-	freecount = 0;
-	mdb_cursor_init(&mc, txn, FREE_DBI, NULL);
-	while ((rc = mdb_cursor_get(&mc, &key, &data, MDB_NEXT)) == 0)
-		freecount += *(MDB_ID *)data.mv_data;
-	mdb_tassert(txn, rc == MDB_NOTFOUND);
-
-	count = 0;
-	for (i = 0; i<txn->mt_numdbs; i++) {
-		MDB_xcursor mx;
-		if (!(txn->mt_dbflags[i] & DB_VALID))
-			continue;
-		mdb_cursor_init(&mc, txn, i, &mx);
-		if (txn->mt_dbs[i].md_root == P_INVALID)
-			continue;
-		count += txn->mt_dbs[i].md_branch_pages +
-			txn->mt_dbs[i].md_leaf_pages +
-			txn->mt_dbs[i].md_overflow_pages;
-		if (txn->mt_dbs[i].md_flags & MDB_DUPSORT) {
-			rc = mdb_page_search(&mc, NULL, MDB_PS_FIRST);
-			for (; rc == MDB_SUCCESS; rc = mdb_cursor_sibling(&mc, 1)) {
-				unsigned j;
-				MDB_page *mp;
-				mp = mc.mc_pg[mc.mc_top];
-				for (j=0; j<NUMKEYS(mp); j++) {
-					MDB_node *leaf = NODEPTR(mp, j);
-					if (leaf->mn_flags & F_SUBDATA) {
-						MDB_db db;
-						memcpy(&db, NODEDATA(leaf), sizeof(db));
-						count += db.md_branch_pages + db.md_leaf_pages +
-							db.md_overflow_pages;
-					}
-				}
-			}
-			mdb_tassert(txn, rc == MDB_NOTFOUND);
-		}
-	}
-	if (freecount + count + NUM_METAS != txn->mt_next_pgno) {
-		fprintf(stderr, "audit: %"Z"u freecount: %"Z"u count: %"Z"u total: %"Z"u next_pgno: %"Z"u\n",
-			txn->mt_txnid, freecount, count+NUM_METAS,
-			freecount+count+NUM_METAS, txn->mt_next_pgno);
-	}
-}
-#endif
-
-int
-mdb_cmp(MDB_txn *txn, MDB_dbi dbi, const MDB_val *a, const MDB_val *b)
-{
-	return txn->mt_dbxs[dbi].md_cmp(a, b);
-}
-
-int
-mdb_dcmp(MDB_txn *txn, MDB_dbi dbi, const MDB_val *a, const MDB_val *b)
-{
-	MDB_cmp_func *dcmp = txn->mt_dbxs[dbi].md_dcmp;
-#if UINT_MAX < SIZE_MAX
-	if (dcmp == mdb_cmp_int && a->mv_size == sizeof(size_t))
-		dcmp = mdb_cmp_clong;
-#endif
-	return dcmp(a, b);
-}
-
-/** Allocate memory for a page.
- * Re-use old malloc'd pages first for singletons, otherwise just malloc.
- * Set #MDB_TXN_ERROR on failure.
- */
-static MDB_page *
-mdb_page_malloc(MDB_txn *txn, unsigned num)
-{
-	MDB_env *env = txn->mt_env;
-	MDB_page *ret = env->me_dpages;
-	size_t psize = env->me_psize, sz = psize, off;
-	/* For ! #MDB_NOMEMINIT, psize counts how much to init.
-	 * For a single page alloc, we init everything after the page header.
-	 * For multi-page, we init the final page; if the caller needed that
-	 * many pages they will be filling in at least up to the last page.
-	 */
-	if (num == 1) {
-		if (ret) {
-			VGMEMP_ALLOC(env, ret, sz);
-			VGMEMP_DEFINED(ret, sizeof(ret->mp_next));
-			env->me_dpages = ret->mp_next;
-			return ret;
-		}
-		psize -= off = PAGEHDRSZ;
-	} else {
-		sz *= num;
-		off = sz - psize;
-	}
-	if ((ret = malloc(sz)) != NULL) {
-		VGMEMP_ALLOC(env, ret, sz);
-		if (!(env->me_flags & MDB_NOMEMINIT)) {
-			memset((char *)ret + off, 0, psize);
-			ret->mp_pad = 0;
-		}
-	} else {
-		txn->mt_flags |= MDB_TXN_ERROR;
-	}
-	return ret;
-}
-/** Free a single page.
- * Saves single pages to a list, for future reuse.
- * (This is not used for multi-page overflow pages.)
- */
-static void
-mdb_page_free(MDB_env *env, MDB_page *mp)
-{
-	mp->mp_next = env->me_dpages;
-	VGMEMP_FREE(env, mp);
-	env->me_dpages = mp;
-}
-
-/** Free a dirty page */
-static void
-mdb_dpage_free(MDB_env *env, MDB_page *dp)
-{
-	if (!IS_OVERFLOW(dp) || dp->mp_pages == 1) {
-		mdb_page_free(env, dp);
-	} else {
-		/* large pages just get freed directly */
-		VGMEMP_FREE(env, dp);
-		free(dp);
-	}
-}
-
-/**	Return all dirty pages to dpage list */
-static void
-mdb_dlist_free(MDB_txn *txn)
-{
-	MDB_env *env = txn->mt_env;
-	MDB_ID2L dl = txn->mt_u.dirty_list;
-	unsigned i, n = dl[0].mid;
-
-	for (i = 1; i <= n; i++) {
-		mdb_dpage_free(env, dl[i].mptr);
-	}
-	dl[0].mid = 0;
-}
-
-/** Loosen or free a single page.
- * Saves single pages to a list for future reuse
- * in this same txn. It has been pulled from the freeDB
- * and already resides on the dirty list, but has been
- * deleted. Use these pages first before pulling again
- * from the freeDB.
- *
- * If the page wasn't dirtied in this txn, just add it
- * to this txn's free list.
- */
-static int
-mdb_page_loose(MDB_cursor *mc, MDB_page *mp)
-{
-	int loose = 0;
-	pgno_t pgno = mp->mp_pgno;
-	MDB_txn *txn = mc->mc_txn;
-
-	if ((mp->mp_flags & P_DIRTY) && mc->mc_dbi != FREE_DBI) {
-		if (txn->mt_parent) {
-			MDB_ID2 *dl = txn->mt_u.dirty_list;
-			/* If txn has a parent, make sure the page is in our
-			 * dirty list.
-			 */
-			if (dl[0].mid) {
-				unsigned x = mdb_mid2l_search(dl, pgno);
-				if (x <= dl[0].mid && dl[x].mid == pgno) {
-					if (mp != dl[x].mptr) { /* bad cursor? */
-						mc->mc_flags &= ~(C_INITIALIZED|C_EOF);
-						txn->mt_flags |= MDB_TXN_ERROR;
-						return MDB_CORRUPTED;
-					}
-					/* ok, it's ours */
-					loose = 1;
-				}
-			}
-		} else {
-			/* no parent txn, so it's just ours */
-			loose = 1;
-		}
-	}
-	if (loose) {
-		DPRINTF(("loosen db %d page %"Z"u", DDBI(mc),
-			mp->mp_pgno));
-		NEXT_LOOSE_PAGE(mp) = txn->mt_loose_pgs;
-		txn->mt_loose_pgs = mp;
-		txn->mt_loose_count++;
-		mp->mp_flags |= P_LOOSE;
-	} else {
-		int rc = mdb_midl_append(&txn->mt_free_pgs, pgno);
-		if (rc)
-			return rc;
-	}
-
-	return MDB_SUCCESS;
-}
-
-/** Set or clear P_KEEP in dirty, non-overflow, non-sub pages watched by txn.
- * @param[in] mc A cursor handle for the current operation.
- * @param[in] pflags Flags of the pages to update:
- * P_DIRTY to set P_KEEP, P_DIRTY|P_KEEP to clear it.
- * @param[in] all No shortcuts. Needed except after a full #mdb_page_flush().
- * @return 0 on success, non-zero on failure.
- */
-static int
-mdb_pages_xkeep(MDB_cursor *mc, unsigned pflags, int all)
-{
-	enum { Mask = P_SUBP|P_DIRTY|P_LOOSE|P_KEEP };
-	MDB_txn *txn = mc->mc_txn;
-	MDB_cursor *m3, *m0 = mc;
-	MDB_xcursor *mx;
-	MDB_page *dp, *mp;
-	MDB_node *leaf;
-	unsigned i, j;
-	int rc = MDB_SUCCESS, level;
-
-	/* Mark pages seen by cursors */
-	if (mc->mc_flags & C_UNTRACK)
-		mc = NULL;				/* will find mc in mt_cursors */
-	for (i = txn->mt_numdbs;; mc = txn->mt_cursors[--i]) {
-		for (; mc; mc=mc->mc_next) {
-			if (!(mc->mc_flags & C_INITIALIZED))
-				continue;
-			for (m3 = mc;; m3 = &mx->mx_cursor) {
-				mp = NULL;
-				for (j=0; j<m3->mc_snum; j++) {
-					mp = m3->mc_pg[j];
-					if ((mp->mp_flags & Mask) == pflags)
-						mp->mp_flags ^= P_KEEP;
-				}
-				mx = m3->mc_xcursor;
-				/* Proceed to mx if it is at a sub-database */
-				if (! (mx && (mx->mx_cursor.mc_flags & C_INITIALIZED)))
-					break;
-				if (! (mp && (mp->mp_flags & P_LEAF)))
-					break;
-				leaf = NODEPTR(mp, m3->mc_ki[j-1]);
-				if (!(leaf->mn_flags & F_SUBDATA))
-					break;
-			}
-		}
-		if (i == 0)
-			break;
-	}
-
-	if (all) {
-		/* Mark dirty root pages */
-		for (i=0; i<txn->mt_numdbs; i++) {
-			if (txn->mt_dbflags[i] & DB_DIRTY) {
-				pgno_t pgno = txn->mt_dbs[i].md_root;
-				if (pgno == P_INVALID)
-					continue;
-				if ((rc = mdb_page_get(m0, pgno, &dp, &level)) != MDB_SUCCESS)
-					break;
-				if ((dp->mp_flags & Mask) == pflags && level <= 1)
-					dp->mp_flags ^= P_KEEP;
-			}
-		}
-	}
-
-	return rc;
-}
-
-static int mdb_page_flush(MDB_txn *txn, int keep);
-
-/**	Spill pages from the dirty list back to disk.
- * This is intended to prevent running into #MDB_TXN_FULL situations,
- * but note that they may still occur in a few cases:
- *	1) our estimate of the txn size could be too small. Currently this
- *	 seems unlikely, except with a large number of #MDB_MULTIPLE items.
- *	2) child txns may run out of space if their parents dirtied a
- *	 lot of pages and never spilled them. TODO: we probably should do
- *	 a preemptive spill during #mdb_txn_begin() of a child txn, if
- *	 the parent's dirty_room is below a given threshold.
- *
- * Otherwise, if not using nested txns, it is expected that apps will
- * not run into #MDB_TXN_FULL any more. The pages are flushed to disk
- * the same way as for a txn commit, e.g. their P_DIRTY flag is cleared.
- * If the txn never references them again, they can be left alone.
- * If the txn only reads them, they can be used without any fuss.
- * If the txn writes them again, they can be dirtied immediately without
- * going thru all of the work of #mdb_page_touch(). Such references are
- * handled by #mdb_page_unspill().
- *
- * Also note, we never spill DB root pages, nor pages of active cursors,
- * because we'll need these back again soon anyway. And in nested txns,
- * we can't spill a page in a child txn if it was already spilled in a
- * parent txn. That would alter the parent txns' data even though
- * the child hasn't committed yet, and we'd have no way to undo it if
- * the child aborted.
- *
- * @param[in] m0 cursor A cursor handle identifying the transaction and
- *	database for which we are checking space.
- * @param[in] key For a put operation, the key being stored.
- * @param[in] data For a put operation, the data being stored.
- * @return 0 on success, non-zero on failure.
- */
-static int
-mdb_page_spill(MDB_cursor *m0, MDB_val *key, MDB_val *data)
-{
-	MDB_txn *txn = m0->mc_txn;
-	MDB_page *dp;
-	MDB_ID2L dl = txn->mt_u.dirty_list;
-	unsigned int i, j, need;
-	int rc;
-
-	if (m0->mc_flags & C_SUB)
-		return MDB_SUCCESS;
-
-	/* Estimate how much space this op will take */
-	i = m0->mc_db->md_depth;
-	/* Named DBs also dirty the main DB */
-	if (m0->mc_dbi >= CORE_DBS)
-		i += txn->mt_dbs[MAIN_DBI].md_depth;
-	/* For puts, roughly factor in the key+data size */
-	if (key)
-		i += (LEAFSIZE(key, data) + txn->mt_env->me_psize) / txn->mt_env->me_psize;
-	i += i;	/* double it for good measure */
-	need = i;
-
-	if (txn->mt_dirty_room > i)
-		return MDB_SUCCESS;
-
-	if (!txn->mt_spill_pgs) {
-		txn->mt_spill_pgs = mdb_midl_alloc(MDB_IDL_UM_MAX);
-		if (!txn->mt_spill_pgs)
-			return ENOMEM;
-	} else {
-		/* purge deleted slots */
-		MDB_IDL sl = txn->mt_spill_pgs;
-		unsigned int num = sl[0];
-		j=0;
-		for (i=1; i<=num; i++) {
-			if (!(sl[i] & 1))
-				sl[++j] = sl[i];
-		}
-		sl[0] = j;
-	}
-
-	/* Preserve pages which may soon be dirtied again */
-	if ((rc = mdb_pages_xkeep(m0, P_DIRTY, 1)) != MDB_SUCCESS)
-		goto done;
-
-	/* Less aggressive spill - we originally spilled the entire dirty list,
-	 * with a few exceptions for cursor pages and DB root pages. But this
-	 * turns out to be a lot of wasted effort because in a large txn many
-	 * of those pages will need to be used again. So now we spill only 1/8th
-	 * of the dirty pages. Testing revealed this to be a good tradeoff,
-	 * better than 1/2, 1/4, or 1/10.
-	 */
-	if (need < MDB_IDL_UM_MAX / 8)
-		need = MDB_IDL_UM_MAX / 8;
-
-	/* Save the page IDs of all the pages we're flushing */
-	/* flush from the tail forward, this saves a lot of shifting later on. */
-	for (i=dl[0].mid; i && need; i--) {
-		MDB_ID pn = dl[i].mid << 1;
-		dp = dl[i].mptr;
-		if (dp->mp_flags & (P_LOOSE|P_KEEP))
-			continue;
-		/* Can't spill twice, make sure it's not already in a parent's
-		 * spill list.
-		 */
-		if (txn->mt_parent) {
-			MDB_txn *tx2;
-			for (tx2 = txn->mt_parent; tx2; tx2 = tx2->mt_parent) {
-				if (tx2->mt_spill_pgs) {
-					j = mdb_midl_search(tx2->mt_spill_pgs, pn);
-					if (j <= tx2->mt_spill_pgs[0] && tx2->mt_spill_pgs[j] == pn) {
-						dp->mp_flags |= P_KEEP;
-						break;
-					}
-				}
-			}
-			if (tx2)
-				continue;
-		}
-		if ((rc = mdb_midl_append(&txn->mt_spill_pgs, pn)))
-			goto done;
-		need--;
-	}
-	mdb_midl_sort(txn->mt_spill_pgs);
-
-	/* Flush the spilled part of dirty list */
-	if ((rc = mdb_page_flush(txn, i)) != MDB_SUCCESS)
-		goto done;
-
-	/* Reset any dirty pages we kept that page_flush didn't see */
-	rc = mdb_pages_xkeep(m0, P_DIRTY|P_KEEP, i);
-
-done:
-	txn->mt_flags |= rc ? MDB_TXN_ERROR : MDB_TXN_SPILLS;
-	return rc;
-}
-
-/** Find oldest txnid still referenced. Expects txn->mt_txnid > 0. */
-static txnid_t
-mdb_find_oldest(MDB_txn *txn)
-{
-	int i;
-	txnid_t mr, oldest = txn->mt_txnid - 1;
-	if (txn->mt_env->me_txns) {
-		MDB_reader *r = txn->mt_env->me_txns->mti_readers;
-		for (i = txn->mt_env->me_txns->mti_numreaders; --i >= 0; ) {
-			if (r[i].mr_pid) {
-				mr = r[i].mr_txnid;
-				if (oldest > mr)
-					oldest = mr;
-			}
-		}
-	}
-	return oldest;
-}
-
-/** Add a page to the txn's dirty list */
-static void
-mdb_page_dirty(MDB_txn *txn, MDB_page *mp)
-{
-	MDB_ID2 mid;
-	int rc, (*insert)(MDB_ID2L, MDB_ID2 *);
-
-	if (txn->mt_flags & MDB_TXN_WRITEMAP) {
-		insert = mdb_mid2l_append;
-	} else {
-		insert = mdb_mid2l_insert;
-	}
-	mid.mid = mp->mp_pgno;
-	mid.mptr = mp;
-	rc = insert(txn->mt_u.dirty_list, &mid);
-	mdb_tassert(txn, rc == 0);
-	txn->mt_dirty_room--;
-}
-
-/** Allocate page numbers and memory for writing.  Maintain me_pglast,
- * me_pghead and mt_next_pgno.  Set #MDB_TXN_ERROR on failure.
- *
- * If there are free pages available from older transactions, they
- * are re-used first. Otherwise allocate a new page at mt_next_pgno.
- * Do not modify the freedB, just merge freeDB records into me_pghead[]
- * and move me_pglast to say which records were consumed.  Only this
- * function can create me_pghead and move me_pglast/mt_next_pgno.
- * @param[in] mc cursor A cursor handle identifying the transaction and
- *	database for which we are allocating.
- * @param[in] num the number of pages to allocate.
- * @param[out] mp Address of the allocated page(s). Requests for multiple pages
- *  will always be satisfied by a single contiguous chunk of memory.
- * @return 0 on success, non-zero on failure.
- */
-static int
-mdb_page_alloc(MDB_cursor *mc, int num, MDB_page **mp)
-{
-#ifdef MDB_PARANOID	/* Seems like we can ignore this now */
-	/* Get at most <Max_retries> more freeDB records once me_pghead
-	 * has enough pages.  If not enough, use new pages from the map.
-	 * If <Paranoid> and mc is updating the freeDB, only get new
-	 * records if me_pghead is empty. Then the freelist cannot play
-	 * catch-up with itself by growing while trying to save it.
-	 */
-	enum { Paranoid = 1, Max_retries = 500 };
-#else
-	enum { Paranoid = 0, Max_retries = INT_MAX /*infinite*/ };
-#endif
-	int rc, retry = num * 60;
-	MDB_txn *txn = mc->mc_txn;
-	MDB_env *env = txn->mt_env;
-	pgno_t pgno, *mop = env->me_pghead;
-	unsigned i, j, mop_len = mop ? mop[0] : 0, n2 = num-1;
-	MDB_page *np;
-	txnid_t oldest = 0, last;
-	MDB_cursor_op op;
-	MDB_cursor m2;
-	int found_old = 0;
-
-	/* If there are any loose pages, just use them */
-	if (num == 1 && txn->mt_loose_pgs) {
-		np = txn->mt_loose_pgs;
-		txn->mt_loose_pgs = NEXT_LOOSE_PAGE(np);
-		txn->mt_loose_count--;
-		DPRINTF(("db %d use loose page %"Z"u", DDBI(mc),
-				np->mp_pgno));
-		*mp = np;
-		return MDB_SUCCESS;
-	}
-
-	*mp = NULL;
-
-	/* If our dirty list is already full, we can't do anything */
-	if (txn->mt_dirty_room == 0) {
-		rc = MDB_TXN_FULL;
-		goto fail;
-	}
-
-	for (op = MDB_FIRST;; op = MDB_NEXT) {
-		MDB_val key, data;
-		MDB_node *leaf;
-		pgno_t *idl;
-
-		/* Seek a big enough contiguous page range. Prefer
-		 * pages at the tail, just truncating the list.
-		 */
-		if (mop_len > n2) {
-			i = mop_len;
-			do {
-				pgno = mop[i];
-				if (mop[i-n2] == pgno+n2)
-					goto search_done;
-			} while (--i > n2);
-			if (--retry < 0)
-				break;
-		}
-
-		if (op == MDB_FIRST) {	/* 1st iteration */
-			/* Prepare to fetch more and coalesce */
-			last = env->me_pglast;
-			oldest = env->me_pgoldest;
-			mdb_cursor_init(&m2, txn, FREE_DBI, NULL);
-			if (last) {
-				op = MDB_SET_RANGE;
-				key.mv_data = &last; /* will look up last+1 */
-				key.mv_size = sizeof(last);
-			}
-			if (Paranoid && mc->mc_dbi == FREE_DBI)
-				retry = -1;
-		}
-		if (Paranoid && retry < 0 && mop_len)
-			break;
-
-		last++;
-		/* Do not fetch more if the record will be too recent */
-		if (oldest <= last) {
-			if (!found_old) {
-				oldest = mdb_find_oldest(txn);
-				env->me_pgoldest = oldest;
-				found_old = 1;
-			}
-			if (oldest <= last)
-				break;
-		}
-		rc = mdb_cursor_get(&m2, &key, NULL, op);
-		if (rc) {
-			if (rc == MDB_NOTFOUND)
-				break;
-			goto fail;
-		}
-		last = *(txnid_t*)key.mv_data;
-		if (oldest <= last) {
-			if (!found_old) {
-				oldest = mdb_find_oldest(txn);
-				env->me_pgoldest = oldest;
-				found_old = 1;
-			}
-			if (oldest <= last)
-				break;
-		}
-		np = m2.mc_pg[m2.mc_top];
-		leaf = NODEPTR(np, m2.mc_ki[m2.mc_top]);
-		if ((rc = mdb_node_read(&m2, leaf, &data)) != MDB_SUCCESS)
-			goto fail;
-
-		idl = (MDB_ID *) data.mv_data;
-		i = idl[0];
-		if (!mop) {
-			if (!(env->me_pghead = mop = mdb_midl_alloc(i))) {
-				rc = ENOMEM;
-				goto fail;
-			}
-		} else {
-			if ((rc = mdb_midl_need(&env->me_pghead, i)) != 0)
-				goto fail;
-			mop = env->me_pghead;
-		}
-		env->me_pglast = last;
-#if (MDB_DEBUG) > 1
-		DPRINTF(("IDL read txn %"Z"u root %"Z"u num %u",
-			last, txn->mt_dbs[FREE_DBI].md_root, i));
-		for (j = i; j; j--)
-			DPRINTF(("IDL %"Z"u", idl[j]));
-#endif
-		/* Merge in descending sorted order */
-		mdb_midl_xmerge(mop, idl);
-		mop_len = mop[0];
-	}
-
-	/* Use new pages from the map when nothing suitable in the freeDB */
-	i = 0;
-	pgno = txn->mt_next_pgno;
-	if (pgno + num >= env->me_maxpg) {
-			DPUTS("DB size maxed out");
-			rc = MDB_MAP_FULL;
-			goto fail;
-	}
-
-search_done:
-	if (env->me_flags & MDB_WRITEMAP) {
-		np = (MDB_page *)(env->me_map + env->me_psize * pgno);
-	} else {
-		if (!(np = mdb_page_malloc(txn, num))) {
-			rc = ENOMEM;
-			goto fail;
-		}
-	}
-	if (i) {
-		mop[0] = mop_len -= num;
-		/* Move any stragglers down */
-		for (j = i-num; j < mop_len; )
-			mop[++j] = mop[++i];
-	} else {
-		txn->mt_next_pgno = pgno + num;
-	}
-	np->mp_pgno = pgno;
-	mdb_page_dirty(txn, np);
-	*mp = np;
-
-	return MDB_SUCCESS;
-
-fail:
-	txn->mt_flags |= MDB_TXN_ERROR;
-	return rc;
-}
-
-/** Copy the used portions of a non-overflow page.
- * @param[in] dst page to copy into
- * @param[in] src page to copy from
- * @param[in] psize size of a page
- */
-static void
-mdb_page_copy(MDB_page *dst, MDB_page *src, unsigned int psize)
-{
-	enum { Align = sizeof(pgno_t) };
-	indx_t upper = src->mp_upper, lower = src->mp_lower, unused = upper-lower;
-
-	/* If page isn't full, just copy the used portion. Adjust
-	 * alignment so memcpy may copy words instead of bytes.
-	 */
-	if ((unused &= -Align) && !IS_LEAF2(src)) {
-		upper = (upper + PAGEBASE) & -Align;
-		memcpy(dst, src, (lower + PAGEBASE + (Align-1)) & -Align);
-		memcpy((pgno_t *)((char *)dst+upper), (pgno_t *)((char *)src+upper),
-			psize - upper);
-	} else {
-		memcpy(dst, src, psize - unused);
-	}
-}
-
-/** Pull a page off the txn's spill list, if present.
- * If a page being referenced was spilled to disk in this txn, bring
- * it back and make it dirty/writable again.
- * @param[in] txn the transaction handle.
- * @param[in] mp the page being referenced. It must not be dirty.
- * @param[out] ret the writable page, if any. ret is unchanged if
- * mp wasn't spilled.
- */
-static int
-mdb_page_unspill(MDB_txn *txn, MDB_page *mp, MDB_page **ret)
-{
-	MDB_env *env = txn->mt_env;
-	const MDB_txn *tx2;
-	unsigned x;
-	pgno_t pgno = mp->mp_pgno, pn = pgno << 1;
-
-	for (tx2 = txn; tx2; tx2=tx2->mt_parent) {
-		if (!tx2->mt_spill_pgs)
-			continue;
-		x = mdb_midl_search(tx2->mt_spill_pgs, pn);
-		if (x <= tx2->mt_spill_pgs[0] && tx2->mt_spill_pgs[x] == pn) {
-			MDB_page *np;
-			int num;
-			if (txn->mt_dirty_room == 0)
-				return MDB_TXN_FULL;
-			if (IS_OVERFLOW(mp))
-				num = mp->mp_pages;
-			else
-				num = 1;
-			if (env->me_flags & MDB_WRITEMAP) {
-				np = mp;
-			} else {
-				np = mdb_page_malloc(txn, num);
-				if (!np)
-					return ENOMEM;
-				if (num > 1)
-					memcpy(np, mp, num * env->me_psize);
-				else
-					mdb_page_copy(np, mp, env->me_psize);
-			}
-			if (tx2 == txn) {
-				/* If in current txn, this page is no longer spilled.
-				 * If it happens to be the last page, truncate the spill list.
-				 * Otherwise mark it as deleted by setting the LSB.
-				 */
-				if (x == txn->mt_spill_pgs[0])
-					txn->mt_spill_pgs[0]--;
-				else
-					txn->mt_spill_pgs[x] |= 1;
-			}	/* otherwise, if belonging to a parent txn, the
-				 * page remains spilled until child commits
-				 */
-
-			mdb_page_dirty(txn, np);
-			np->mp_flags |= P_DIRTY;
-			*ret = np;
-			break;
-		}
-	}
-	return MDB_SUCCESS;
-}
-
-/** Touch a page: make it dirty and re-insert into tree with updated pgno.
- * Set #MDB_TXN_ERROR on failure.
- * @param[in] mc cursor pointing to the page to be touched
- * @return 0 on success, non-zero on failure.
- */
-static int
-mdb_page_touch(MDB_cursor *mc)
-{
-	MDB_page *mp = mc->mc_pg[mc->mc_top], *np;
-	MDB_txn *txn = mc->mc_txn;
-	MDB_cursor *m2, *m3;
-	pgno_t	pgno;
-	int rc;
-
-	if (!F_ISSET(mp->mp_flags, P_DIRTY)) {
-		if (txn->mt_flags & MDB_TXN_SPILLS) {
-			np = NULL;
-			rc = mdb_page_unspill(txn, mp, &np);
-			if (rc)
-				goto fail;
-			if (np)
-				goto done;
-		}
-		if ((rc = mdb_midl_need(&txn->mt_free_pgs, 1)) ||
-			(rc = mdb_page_alloc(mc, 1, &np)))
-			goto fail;
-		pgno = np->mp_pgno;
-		DPRINTF(("touched db %d page %"Z"u -> %"Z"u", DDBI(mc),
-			mp->mp_pgno, pgno));
-		mdb_cassert(mc, mp->mp_pgno != pgno);
-		mdb_midl_xappend(txn->mt_free_pgs, mp->mp_pgno);
-		/* Update the parent page, if any, to point to the new page */
-		if (mc->mc_top) {
-			MDB_page *parent = mc->mc_pg[mc->mc_top-1];
-			MDB_node *node = NODEPTR(parent, mc->mc_ki[mc->mc_top-1]);
-			SETPGNO(node, pgno);
-		} else {
-			mc->mc_db->md_root = pgno;
-		}
-	} else if (txn->mt_parent && !IS_SUBP(mp)) {
-		MDB_ID2 mid, *dl = txn->mt_u.dirty_list;
-		pgno = mp->mp_pgno;
-		/* If txn has a parent, make sure the page is in our
-		 * dirty list.
-		 */
-		if (dl[0].mid) {
-			unsigned x = mdb_mid2l_search(dl, pgno);
-			if (x <= dl[0].mid && dl[x].mid == pgno) {
-				if (mp != dl[x].mptr) { /* bad cursor? */
-					mc->mc_flags &= ~(C_INITIALIZED|C_EOF);
-					txn->mt_flags |= MDB_TXN_ERROR;
-					return MDB_CORRUPTED;
-				}
-				return 0;
-			}
-		}
-		mdb_cassert(mc, dl[0].mid < MDB_IDL_UM_MAX);
-		/* No - copy it */
-		np = mdb_page_malloc(txn, 1);
-		if (!np)
-			return ENOMEM;
-		mid.mid = pgno;
-		mid.mptr = np;
-		rc = mdb_mid2l_insert(dl, &mid);
-		mdb_cassert(mc, rc == 0);
-	} else {
-		return 0;
-	}
-
-	mdb_page_copy(np, mp, txn->mt_env->me_psize);
-	np->mp_pgno = pgno;
-	np->mp_flags |= P_DIRTY;
-
-done:
-	/* Adjust cursors pointing to mp */
-	mc->mc_pg[mc->mc_top] = np;
-	m2 = txn->mt_cursors[mc->mc_dbi];
-	if (mc->mc_flags & C_SUB) {
-		for (; m2; m2=m2->mc_next) {
-			m3 = &m2->mc_xcursor->mx_cursor;
-			if (m3->mc_snum < mc->mc_snum) continue;
-			if (m3->mc_pg[mc->mc_top] == mp)
-				m3->mc_pg[mc->mc_top] = np;
-		}
-	} else {
-		for (; m2; m2=m2->mc_next) {
-			if (m2->mc_snum < mc->mc_snum) continue;
-			if (m2 == mc) continue;
-			if (m2->mc_pg[mc->mc_top] == mp) {
-				m2->mc_pg[mc->mc_top] = np;
-				if (IS_LEAF(np))
-					XCURSOR_REFRESH(m2, mc->mc_top, np);
-			}
-		}
-	}
-	return 0;
-
-fail:
-	txn->mt_flags |= MDB_TXN_ERROR;
-	return rc;
-}
-
-int
-mdb_env_sync(MDB_env *env, int force)
-{
-	int rc = 0;
-	if (env->me_flags & MDB_RDONLY)
-		return EACCES;
-	if (force || !F_ISSET(env->me_flags, MDB_NOSYNC)) {
-		if (env->me_flags & MDB_WRITEMAP) {
-			int flags = ((env->me_flags & MDB_MAPASYNC) && !force)
-				? MS_ASYNC : MS_SYNC;
-			if (MDB_MSYNC(env->me_map, env->me_mapsize, flags))
-				rc = ErrCode();
-#ifdef _WIN32
-			else if (flags == MS_SYNC && MDB_FDATASYNC(env->me_fd))
-				rc = ErrCode();
-#endif
-		} else {
-#ifdef BROKEN_FDATASYNC
-			if (env->me_flags & MDB_FSYNCONLY) {
-				if (fsync(env->me_fd))
-					rc = ErrCode();
-			} else
-#endif
-			if (MDB_FDATASYNC(env->me_fd))
-				rc = ErrCode();
-		}
-	}
-	return rc;
-}
-
-/** Back up parent txn's cursors, then grab the originals for tracking */
-static int
-mdb_cursor_shadow(MDB_txn *src, MDB_txn *dst)
-{
-	MDB_cursor *mc, *bk;
-	MDB_xcursor *mx;
-	size_t size;
-	int i;
-
-	for (i = src->mt_numdbs; --i >= 0; ) {
-		if ((mc = src->mt_cursors[i]) != NULL) {
-			size = sizeof(MDB_cursor);
-			if (mc->mc_xcursor)
-				size += sizeof(MDB_xcursor);
-			for (; mc; mc = bk->mc_next) {
-				bk = malloc(size);
-				if (!bk)
-					return ENOMEM;
-				*bk = *mc;
-				mc->mc_backup = bk;
-				mc->mc_db = &dst->mt_dbs[i];
-				/* Kill pointers into src to reduce abuse: The
-				 * user may not use mc until dst ends. But we need a valid
-				 * txn pointer here for cursor fixups to keep working.
-				 */
-				mc->mc_txn    = dst;
-				mc->mc_dbflag = &dst->mt_dbflags[i];
-				if ((mx = mc->mc_xcursor) != NULL) {
-					*(MDB_xcursor *)(bk+1) = *mx;
-					mx->mx_cursor.mc_txn = dst;
-				}
-				mc->mc_next = dst->mt_cursors[i];
-				dst->mt_cursors[i] = mc;
-			}
-		}
-	}
-	return MDB_SUCCESS;
-}
-
-/** Close this write txn's cursors, give parent txn's cursors back to parent.
- * @param[in] txn the transaction handle.
- * @param[in] merge true to keep changes to parent cursors, false to revert.
- * @return 0 on success, non-zero on failure.
- */
-static void
-mdb_cursors_close(MDB_txn *txn, unsigned merge)
-{
-	MDB_cursor **cursors = txn->mt_cursors, *mc, *next, *bk;
-	MDB_xcursor *mx;
-	int i;
-
-	for (i = txn->mt_numdbs; --i >= 0; ) {
-		for (mc = cursors[i]; mc; mc = next) {
-			next = mc->mc_next;
-			if ((bk = mc->mc_backup) != NULL) {
-				if (merge) {
-					/* Commit changes to parent txn */
-					mc->mc_next = bk->mc_next;
-					mc->mc_backup = bk->mc_backup;
-					mc->mc_txn = bk->mc_txn;
-					mc->mc_db = bk->mc_db;
-					mc->mc_dbflag = bk->mc_dbflag;
-					if ((mx = mc->mc_xcursor) != NULL)
-						mx->mx_cursor.mc_txn = bk->mc_txn;
-				} else {
-					/* Abort nested txn */
-					*mc = *bk;
-					if ((mx = mc->mc_xcursor) != NULL)
-						*mx = *(MDB_xcursor *)(bk+1);
-				}
-				mc = bk;
-			}
-			/* Only malloced cursors are permanently tracked. */
-			free(mc);
-		}
-		cursors[i] = NULL;
-	}
-}
-
-#if !(MDB_PIDLOCK)		/* Currently the same as defined(_WIN32) */
-enum Pidlock_op {
-	Pidset, Pidcheck
-};
-#else
-enum Pidlock_op {
-	Pidset = F_SETLK, Pidcheck = F_GETLK
-};
-#endif
-
-/** Set or check a pid lock. Set returns 0 on success.
- * Check returns 0 if the process is certainly dead, nonzero if it may
- * be alive (the lock exists or an error happened so we do not know).
- *
- * On Windows Pidset is a no-op, we merely check for the existence
- * of the process with the given pid. On POSIX we use a single byte
- * lock on the lockfile, set at an offset equal to the pid.
- */
-static int
-mdb_reader_pid(MDB_env *env, enum Pidlock_op op, MDB_PID_T pid)
-{
-#if !(MDB_PIDLOCK)		/* Currently the same as defined(_WIN32) */
-	int ret = 0;
-	HANDLE h;
-	if (op == Pidcheck) {
-		h = OpenProcess(env->me_pidquery, FALSE, pid);
-		/* No documented "no such process" code, but other program use this: */
-		if (!h)
-			return ErrCode() != ERROR_INVALID_PARAMETER;
-		/* A process exists until all handles to it close. Has it exited? */
-		ret = WaitForSingleObject(h, 0) != 0;
-		CloseHandle(h);
-	}
-	return ret;
-#else
-	for (;;) {
-		int rc;
-		struct flock lock_info;
-		memset(&lock_info, 0, sizeof(lock_info));
-		lock_info.l_type = F_WRLCK;
-		lock_info.l_whence = SEEK_SET;
-		lock_info.l_start = pid;
-		lock_info.l_len = 1;
-		if ((rc = fcntl(env->me_lfd, op, &lock_info)) == 0) {
-			if (op == F_GETLK && lock_info.l_type != F_UNLCK)
-				rc = -1;
-		} else if ((rc = ErrCode()) == EINTR) {
-			continue;
-		}
-		return rc;
-	}
-#endif
-}
-
-/** Common code for #mdb_txn_begin() and #mdb_txn_renew().
- * @param[in] txn the transaction handle to initialize
- * @return 0 on success, non-zero on failure.
- */
-static int
-mdb_txn_renew0(MDB_txn *txn)
-{
-	MDB_env *env = txn->mt_env;
-	MDB_txninfo *ti = env->me_txns;
-	MDB_meta *meta;
-	unsigned int i, nr, flags = txn->mt_flags;
-	uint16_t x;
-	int rc, new_notls = 0;
-
-	if ((flags &= MDB_TXN_RDONLY) != 0) {
-		if (!ti) {
-			meta = mdb_env_pick_meta(env);
-			txn->mt_txnid = meta->mm_txnid;
-			txn->mt_u.reader = NULL;
-		} else {
-			MDB_reader *r = (env->me_flags & MDB_NOTLS) ? txn->mt_u.reader :
-				pthread_getspecific(env->me_txkey);
-			if (r) {
-				if (r->mr_pid != env->me_pid || r->mr_txnid != (txnid_t)-1)
-					return MDB_BAD_RSLOT;
-			} else {
-				MDB_PID_T pid = env->me_pid;
-				MDB_THR_T tid = pthread_self();
-				mdb_mutexref_t rmutex = env->me_rmutex;
-
-				if (!env->me_live_reader) {
-					rc = mdb_reader_pid(env, Pidset, pid);
-					if (rc)
-						return rc;
-					env->me_live_reader = 1;
-				}
-
-				if (LOCK_MUTEX(rc, env, rmutex))
-					return rc;
-				nr = ti->mti_numreaders;
-				for (i=0; i<nr; i++)
-					if (ti->mti_readers[i].mr_pid == 0)
-						break;
-				if (i == env->me_maxreaders) {
-					UNLOCK_MUTEX(rmutex);
-					return MDB_READERS_FULL;
-				}
-				r = &ti->mti_readers[i];
-				/* Claim the reader slot, carefully since other code
-				 * uses the reader table un-mutexed: First reset the
-				 * slot, next publish it in mti_numreaders.  After
-				 * that, it is safe for mdb_env_close() to touch it.
-				 * When it will be closed, we can finally claim it.
-				 */
-				r->mr_pid = 0;
-				r->mr_txnid = (txnid_t)-1;
-				r->mr_tid = tid;
-				if (i == nr)
-					ti->mti_numreaders = ++nr;
-				env->me_close_readers = nr;
-				r->mr_pid = pid;
-				UNLOCK_MUTEX(rmutex);
-
-				new_notls = (env->me_flags & MDB_NOTLS);
-				if (!new_notls && (rc=pthread_setspecific(env->me_txkey, r))) {
-					r->mr_pid = 0;
-					return rc;
-				}
-			}
-			do /* LY: Retry on a race, ITS#7970. */
-				r->mr_txnid = ti->mti_txnid;
-			while(r->mr_txnid != ti->mti_txnid);
-			txn->mt_txnid = r->mr_txnid;
-			txn->mt_u.reader = r;
-			meta = env->me_metas[txn->mt_txnid & 1];
-		}
-
-	} else {
-		/* Not yet touching txn == env->me_txn0, it may be active */
-		if (ti) {
-			if (LOCK_MUTEX(rc, env, env->me_wmutex))
-				return rc;
-			txn->mt_txnid = ti->mti_txnid;
-			meta = env->me_metas[txn->mt_txnid & 1];
-		} else {
-			meta = mdb_env_pick_meta(env);
-			txn->mt_txnid = meta->mm_txnid;
-		}
-		txn->mt_txnid++;
-#if MDB_DEBUG
-		if (txn->mt_txnid == mdb_debug_start)
-			mdb_debug = 1;
-#endif
-		txn->mt_child = NULL;
-		txn->mt_loose_pgs = NULL;
-		txn->mt_loose_count = 0;
-		txn->mt_dirty_room = MDB_IDL_UM_MAX;
-		txn->mt_u.dirty_list = env->me_dirty_list;
-		txn->mt_u.dirty_list[0].mid = 0;
-		txn->mt_free_pgs = env->me_free_pgs;
-		txn->mt_free_pgs[0] = 0;
-		txn->mt_spill_pgs = NULL;
-		env->me_txn = txn;
-		memcpy(txn->mt_dbiseqs, env->me_dbiseqs, env->me_maxdbs * sizeof(unsigned int));
-	}
-
-	/* Copy the DB info and flags */
-	memcpy(txn->mt_dbs, meta->mm_dbs, CORE_DBS * sizeof(MDB_db));
-
-	/* Moved to here to avoid a data race in read TXNs */
-	txn->mt_next_pgno = meta->mm_last_pg+1;
-
-	txn->mt_flags = flags;
-
-	/* Setup db info */
-	txn->mt_numdbs = env->me_numdbs;
-	for (i=CORE_DBS; i<txn->mt_numdbs; i++) {
-		x = env->me_dbflags[i];
-		txn->mt_dbs[i].md_flags = x & PERSISTENT_FLAGS;
-		txn->mt_dbflags[i] = (x & MDB_VALID) ? DB_VALID|DB_USRVALID|DB_STALE : 0;
-	}
-	txn->mt_dbflags[MAIN_DBI] = DB_VALID|DB_USRVALID;
-	txn->mt_dbflags[FREE_DBI] = DB_VALID;
-
-	if (env->me_flags & MDB_FATAL_ERROR) {
-		DPUTS("environment had fatal error, must shutdown!");
-		rc = MDB_PANIC;
-	} else if (env->me_maxpg < txn->mt_next_pgno) {
-		rc = MDB_MAP_RESIZED;
-	} else {
-		return MDB_SUCCESS;
-	}
-	mdb_txn_end(txn, new_notls /*0 or MDB_END_SLOT*/ | MDB_END_FAIL_BEGIN);
-	return rc;
-}
-
-int
-mdb_txn_renew(MDB_txn *txn)
-{
-	int rc;
-
-	if (!txn || !F_ISSET(txn->mt_flags, MDB_TXN_RDONLY|MDB_TXN_FINISHED))
-		return EINVAL;
-
-	rc = mdb_txn_renew0(txn);
-	if (rc == MDB_SUCCESS) {
-		DPRINTF(("renew txn %"Z"u%c %p on mdbenv %p, root page %"Z"u",
-			txn->mt_txnid, (txn->mt_flags & MDB_TXN_RDONLY) ? 'r' : 'w',
-			(void *)txn, (void *)txn->mt_env, txn->mt_dbs[MAIN_DBI].md_root));
-	}
-	return rc;
-}
-
-int
-mdb_txn_begin(MDB_env *env, MDB_txn *parent, unsigned int flags, MDB_txn **ret)
-{
-	MDB_txn *txn;
-	MDB_ntxn *ntxn;
-	int rc, size, tsize;
-
-	flags &= MDB_TXN_BEGIN_FLAGS;
-	flags |= env->me_flags & MDB_WRITEMAP;
-
-	if (env->me_flags & MDB_RDONLY & ~flags) /* write txn in RDONLY env */
-		return EACCES;
-
-	if (parent) {
-		/* Nested transactions: Max 1 child, write txns only, no writemap */
-		flags |= parent->mt_flags;
-		if (flags & (MDB_RDONLY|MDB_WRITEMAP|MDB_TXN_BLOCKED)) {
-			return (parent->mt_flags & MDB_TXN_RDONLY) ? EINVAL : MDB_BAD_TXN;
-		}
-		/* Child txns save MDB_pgstate and use own copy of cursors */
-		size = env->me_maxdbs * (sizeof(MDB_db)+sizeof(MDB_cursor *)+1);
-		size += tsize = sizeof(MDB_ntxn);
-	} else if (flags & MDB_RDONLY) {
-		size = env->me_maxdbs * (sizeof(MDB_db)+1);
-		size += tsize = sizeof(MDB_txn);
-	} else {
-		/* Reuse preallocated write txn. However, do not touch it until
-		 * mdb_txn_renew0() succeeds, since it currently may be active.
-		 */
-		txn = env->me_txn0;
-		goto renew;
-	}
-	if ((txn = calloc(1, size)) == NULL) {
-		DPRINTF(("calloc: %s", strerror(errno)));
-		return ENOMEM;
-	}
-	txn->mt_dbxs = env->me_dbxs;	/* static */
-	txn->mt_dbs = (MDB_db *) ((char *)txn + tsize);
-	txn->mt_dbflags = (unsigned char *)txn + size - env->me_maxdbs;
-	txn->mt_flags = flags;
-	txn->mt_env = env;
-
-	if (parent) {
-		unsigned int i;
-		txn->mt_cursors = (MDB_cursor **)(txn->mt_dbs + env->me_maxdbs);
-		txn->mt_dbiseqs = parent->mt_dbiseqs;
-		txn->mt_u.dirty_list = malloc(sizeof(MDB_ID2)*MDB_IDL_UM_SIZE);
-		if (!txn->mt_u.dirty_list ||
-			!(txn->mt_free_pgs = mdb_midl_alloc(MDB_IDL_UM_MAX)))
-		{
-			free(txn->mt_u.dirty_list);
-			free(txn);
-			return ENOMEM;
-		}
-		txn->mt_txnid = parent->mt_txnid;
-		txn->mt_dirty_room = parent->mt_dirty_room;
-		txn->mt_u.dirty_list[0].mid = 0;
-		txn->mt_spill_pgs = NULL;
-		txn->mt_next_pgno = parent->mt_next_pgno;
-		parent->mt_flags |= MDB_TXN_HAS_CHILD;
-		parent->mt_child = txn;
-		txn->mt_parent = parent;
-		txn->mt_numdbs = parent->mt_numdbs;
-		memcpy(txn->mt_dbs, parent->mt_dbs, txn->mt_numdbs * sizeof(MDB_db));
-		/* Copy parent's mt_dbflags, but clear DB_NEW */
-		for (i=0; i<txn->mt_numdbs; i++)
-			txn->mt_dbflags[i] = parent->mt_dbflags[i] & ~DB_NEW;
-		rc = 0;
-		ntxn = (MDB_ntxn *)txn;
-		ntxn->mnt_pgstate = env->me_pgstate; /* save parent me_pghead & co */
-		if (env->me_pghead) {
-			size = MDB_IDL_SIZEOF(env->me_pghead);
-			env->me_pghead = mdb_midl_alloc(env->me_pghead[0]);
-			if (env->me_pghead)
-				memcpy(env->me_pghead, ntxn->mnt_pgstate.mf_pghead, size);
-			else
-				rc = ENOMEM;
-		}
-		if (!rc)
-			rc = mdb_cursor_shadow(parent, txn);
-		if (rc)
-			mdb_txn_end(txn, MDB_END_FAIL_BEGINCHILD);
-	} else { /* MDB_RDONLY */
-		txn->mt_dbiseqs = env->me_dbiseqs;
-renew:
-		rc = mdb_txn_renew0(txn);
-	}
-	if (rc) {
-		if (txn != env->me_txn0)
-			free(txn);
-	} else {
-		txn->mt_flags |= flags;	/* could not change txn=me_txn0 earlier */
-		*ret = txn;
-		DPRINTF(("begin txn %"Z"u%c %p on mdbenv %p, root page %"Z"u",
-			txn->mt_txnid, (flags & MDB_RDONLY) ? 'r' : 'w',
-			(void *) txn, (void *) env, txn->mt_dbs[MAIN_DBI].md_root));
-	}
-
-	return rc;
-}
-
-MDB_env *
-mdb_txn_env(MDB_txn *txn)
-{
-	if(!txn) return NULL;
-	return txn->mt_env;
-}
-
-size_t
-mdb_txn_id(MDB_txn *txn)
-{
-    if(!txn) return 0;
-    return txn->mt_txnid;
-}
-
-/** Export or close DBI handles opened in this txn. */
-static void
-mdb_dbis_update(MDB_txn *txn, int keep)
-{
-	int i;
-	MDB_dbi n = txn->mt_numdbs;
-	MDB_env *env = txn->mt_env;
-	unsigned char *tdbflags = txn->mt_dbflags;
-
-	for (i = n; --i >= CORE_DBS;) {
-		if (tdbflags[i] & DB_NEW) {
-			if (keep) {
-				env->me_dbflags[i] = txn->mt_dbs[i].md_flags | MDB_VALID;
-			} else {
-				char *ptr = env->me_dbxs[i].md_name.mv_data;
-				if (ptr) {
-					env->me_dbxs[i].md_name.mv_data = NULL;
-					env->me_dbxs[i].md_name.mv_size = 0;
-					env->me_dbflags[i] = 0;
-					env->me_dbiseqs[i]++;
-					free(ptr);
-				}
-			}
-		}
-	}
-	if (keep && env->me_numdbs < n)
-		env->me_numdbs = n;
-}
-
-/** End a transaction, except successful commit of a nested transaction.
- * May be called twice for readonly txns: First reset it, then abort.
- * @param[in] txn the transaction handle to end
- * @param[in] mode why and how to end the transaction
- */
-static void
-mdb_txn_end(MDB_txn *txn, unsigned mode)
-{
-	MDB_env	*env = txn->mt_env;
-#if MDB_DEBUG
-	static const char *const names[] = MDB_END_NAMES;
-#endif
-
-	/* Export or close DBI handles opened in this txn */
-	mdb_dbis_update(txn, mode & MDB_END_UPDATE);
-
-	DPRINTF(("%s txn %"Z"u%c %p on mdbenv %p, root page %"Z"u",
-		names[mode & MDB_END_OPMASK],
-		txn->mt_txnid, (txn->mt_flags & MDB_TXN_RDONLY) ? 'r' : 'w',
-		(void *) txn, (void *)env, txn->mt_dbs[MAIN_DBI].md_root));
-
-	if (F_ISSET(txn->mt_flags, MDB_TXN_RDONLY)) {
-		if (txn->mt_u.reader) {
-			txn->mt_u.reader->mr_txnid = (txnid_t)-1;
-			if (!(env->me_flags & MDB_NOTLS)) {
-				txn->mt_u.reader = NULL; /* txn does not own reader */
-			} else if (mode & MDB_END_SLOT) {
-				txn->mt_u.reader->mr_pid = 0;
-				txn->mt_u.reader = NULL;
-			} /* else txn owns the slot until it does MDB_END_SLOT */
-		}
-		txn->mt_numdbs = 0;		/* prevent further DBI activity */
-		txn->mt_flags |= MDB_TXN_FINISHED;
-
-	} else if (!F_ISSET(txn->mt_flags, MDB_TXN_FINISHED)) {
-		pgno_t *pghead = env->me_pghead;
-
-		if (!(mode & MDB_END_UPDATE)) /* !(already closed cursors) */
-			mdb_cursors_close(txn, 0);
-		if (!(env->me_flags & MDB_WRITEMAP)) {
-			mdb_dlist_free(txn);
-		}
-
-		txn->mt_numdbs = 0;
-		txn->mt_flags = MDB_TXN_FINISHED;
-
-		if (!txn->mt_parent) {
-			mdb_midl_shrink(&txn->mt_free_pgs);
-			env->me_free_pgs = txn->mt_free_pgs;
-			/* me_pgstate: */
-			env->me_pghead = NULL;
-			env->me_pglast = 0;
-
-			env->me_txn = NULL;
-			mode = 0;	/* txn == env->me_txn0, do not free() it */
-
-			/* The writer mutex was locked in mdb_txn_begin. */
-			if (env->me_txns)
-				UNLOCK_MUTEX(env->me_wmutex);
-		} else {
-			txn->mt_parent->mt_child = NULL;
-			txn->mt_parent->mt_flags &= ~MDB_TXN_HAS_CHILD;
-			env->me_pgstate = ((MDB_ntxn *)txn)->mnt_pgstate;
-			mdb_midl_free(txn->mt_free_pgs);
-			mdb_midl_free(txn->mt_spill_pgs);
-			free(txn->mt_u.dirty_list);
-		}
-
-		mdb_midl_free(pghead);
-	}
-
-	if (mode & MDB_END_FREE)
-		free(txn);
-}
-
-void
-mdb_txn_reset(MDB_txn *txn)
-{
-	if (txn == NULL)
-		return;
-
-	/* This call is only valid for read-only txns */
-	if (!(txn->mt_flags & MDB_TXN_RDONLY))
-		return;
-
-	mdb_txn_end(txn, MDB_END_RESET);
-}
-
-void
-mdb_txn_abort(MDB_txn *txn)
-{
-	if (txn == NULL)
-		return;
-
-	if (txn->mt_child)
-		mdb_txn_abort(txn->mt_child);
-
-	mdb_txn_end(txn, MDB_END_ABORT|MDB_END_SLOT|MDB_END_FREE);
-}
-
-/** Save the freelist as of this transaction to the freeDB.
- * This changes the freelist. Keep trying until it stabilizes.
- */
-static int
-mdb_freelist_save(MDB_txn *txn)
-{
-	/* env->me_pghead[] can grow and shrink during this call.
-	 * env->me_pglast and txn->mt_free_pgs[] can only grow.
-	 * Page numbers cannot disappear from txn->mt_free_pgs[].
-	 */
-	MDB_cursor mc;
-	MDB_env	*env = txn->mt_env;
-	int rc, maxfree_1pg = env->me_maxfree_1pg, more = 1;
-	txnid_t	pglast = 0, head_id = 0;
-	pgno_t	freecnt = 0, *free_pgs, *mop;
-	ssize_t	head_room = 0, total_room = 0, mop_len, clean_limit;
-
-	mdb_cursor_init(&mc, txn, FREE_DBI, NULL);
-
-	if (env->me_pghead) {
-		/* Make sure first page of freeDB is touched and on freelist */
-		rc = mdb_page_search(&mc, NULL, MDB_PS_FIRST|MDB_PS_MODIFY);
-		if (rc && rc != MDB_NOTFOUND)
-			return rc;
-	}
-
-	if (!env->me_pghead && txn->mt_loose_pgs) {
-		/* Put loose page numbers in mt_free_pgs, since
-		 * we may be unable to return them to me_pghead.
-		 */
-		MDB_page *mp = txn->mt_loose_pgs;
-		if ((rc = mdb_midl_need(&txn->mt_free_pgs, txn->mt_loose_count)) != 0)
-			return rc;
-		for (; mp; mp = NEXT_LOOSE_PAGE(mp))
-			mdb_midl_xappend(txn->mt_free_pgs, mp->mp_pgno);
-		txn->mt_loose_pgs = NULL;
-		txn->mt_loose_count = 0;
-	}
-
-	/* MDB_RESERVE cancels meminit in ovpage malloc (when no WRITEMAP) */
-	clean_limit = (env->me_flags & (MDB_NOMEMINIT|MDB_WRITEMAP))
-		? SSIZE_MAX : maxfree_1pg;
-
-	for (;;) {
-		/* Come back here after each Put() in case freelist changed */
-		MDB_val key, data;
-		pgno_t *pgs;
-		ssize_t j;
-
-		/* If using records from freeDB which we have not yet
-		 * deleted, delete them and any we reserved for me_pghead.
-		 */
-		while (pglast < env->me_pglast) {
-			rc = mdb_cursor_first(&mc, &key, NULL);
-			if (rc)
-				return rc;
-			pglast = head_id = *(txnid_t *)key.mv_data;
-			total_room = head_room = 0;
-			mdb_tassert(txn, pglast <= env->me_pglast);
-			rc = mdb_cursor_del(&mc, 0);
-			if (rc)
-				return rc;
-		}
-
-		/* Save the IDL of pages freed by this txn, to a single record */
-		if (freecnt < txn->mt_free_pgs[0]) {
-			if (!freecnt) {
-				/* Make sure last page of freeDB is touched and on freelist */
-				rc = mdb_page_search(&mc, NULL, MDB_PS_LAST|MDB_PS_MODIFY);
-				if (rc && rc != MDB_NOTFOUND)
-					return rc;
-			}
-			free_pgs = txn->mt_free_pgs;
-			/* Write to last page of freeDB */
-			key.mv_size = sizeof(txn->mt_txnid);
-			key.mv_data = &txn->mt_txnid;
-			do {
-				freecnt = free_pgs[0];
-				data.mv_size = MDB_IDL_SIZEOF(free_pgs);
-				rc = mdb_cursor_put(&mc, &key, &data, MDB_RESERVE);
-				if (rc)
-					return rc;
-				/* Retry if mt_free_pgs[] grew during the Put() */
-				free_pgs = txn->mt_free_pgs;
-			} while (freecnt < free_pgs[0]);
-			mdb_midl_sort(free_pgs);
-			memcpy(data.mv_data, free_pgs, data.mv_size);
-#if (MDB_DEBUG) > 1
-			{
-				unsigned int i = free_pgs[0];
-				DPRINTF(("IDL write txn %"Z"u root %"Z"u num %u",
-					txn->mt_txnid, txn->mt_dbs[FREE_DBI].md_root, i));
-				for (; i; i--)
-					DPRINTF(("IDL %"Z"u", free_pgs[i]));
-			}
-#endif
-			continue;
-		}
-
-		mop = env->me_pghead;
-		mop_len = (mop ? mop[0] : 0) + txn->mt_loose_count;
-
-		/* Reserve records for me_pghead[]. Split it if multi-page,
-		 * to avoid searching freeDB for a page range. Use keys in
-		 * range [1,me_pglast]: Smaller than txnid of oldest reader.
-		 */
-		if (total_room >= mop_len) {
-			if (total_room == mop_len || --more < 0)
-				break;
-		} else if (head_room >= maxfree_1pg && head_id > 1) {
-			/* Keep current record (overflow page), add a new one */
-			head_id--;
-			head_room = 0;
-		}
-		/* (Re)write {key = head_id, IDL length = head_room} */
-		total_room -= head_room;
-		head_room = mop_len - total_room;
-		if (head_room > maxfree_1pg && head_id > 1) {
-			/* Overflow multi-page for part of me_pghead */
-			head_room /= head_id; /* amortize page sizes */
-			head_room += maxfree_1pg - head_room % (maxfree_1pg + 1);
-		} else if (head_room < 0) {
-			/* Rare case, not bothering to delete this record */
-			head_room = 0;
-		}
-		key.mv_size = sizeof(head_id);
-		key.mv_data = &head_id;
-		data.mv_size = (head_room + 1) * sizeof(pgno_t);
-		rc = mdb_cursor_put(&mc, &key, &data, MDB_RESERVE);
-		if (rc)
-			return rc;
-		/* IDL is initially empty, zero out at least the length */
-		pgs = (pgno_t *)data.mv_data;
-		j = head_room > clean_limit ? head_room : 0;
-		do {
-			pgs[j] = 0;
-		} while (--j >= 0);
-		total_room += head_room;
-	}
-
-	/* Return loose page numbers to me_pghead, though usually none are
-	 * left at this point.  The pages themselves remain in dirty_list.
-	 */
-	if (txn->mt_loose_pgs) {
-		MDB_page *mp = txn->mt_loose_pgs;
-		unsigned count = txn->mt_loose_count;
-		MDB_IDL loose;
-		/* Room for loose pages + temp IDL with same */
-		if ((rc = mdb_midl_need(&env->me_pghead, 2*count+1)) != 0)
-			return rc;
-		mop = env->me_pghead;
-		loose = mop + MDB_IDL_ALLOCLEN(mop) - count;
-		for (count = 0; mp; mp = NEXT_LOOSE_PAGE(mp))
-			loose[ ++count ] = mp->mp_pgno;
-		loose[0] = count;
-		mdb_midl_sort(loose);
-		mdb_midl_xmerge(mop, loose);
-		txn->mt_loose_pgs = NULL;
-		txn->mt_loose_count = 0;
-		mop_len = mop[0];
-	}
-
-	/* Fill in the reserved me_pghead records */
-	rc = MDB_SUCCESS;
-	if (mop_len) {
-		MDB_val key, data;
-
-		mop += mop_len;
-		rc = mdb_cursor_first(&mc, &key, &data);
-		for (; !rc; rc = mdb_cursor_next(&mc, &key, &data, MDB_NEXT)) {
-			txnid_t id = *(txnid_t *)key.mv_data;
-			ssize_t	len = (ssize_t)(data.mv_size / sizeof(MDB_ID)) - 1;
-			MDB_ID save;
-
-			mdb_tassert(txn, len >= 0 && id <= env->me_pglast);
-			key.mv_data = &id;
-			if (len > mop_len) {
-				len = mop_len;
-				data.mv_size = (len + 1) * sizeof(MDB_ID);
-			}
-			data.mv_data = mop -= len;
-			save = mop[0];
-			mop[0] = len;
-			rc = mdb_cursor_put(&mc, &key, &data, MDB_CURRENT);
-			mop[0] = save;
-			if (rc || !(mop_len -= len))
-				break;
-		}
-	}
-	return rc;
-}
-
-/** Flush (some) dirty pages to the map, after clearing their dirty flag.
- * @param[in] txn the transaction that's being committed
- * @param[in] keep number of initial pages in dirty_list to keep dirty.
- * @return 0 on success, non-zero on failure.
- */
-static int
-mdb_page_flush(MDB_txn *txn, int keep)
-{
-	MDB_env		*env = txn->mt_env;
-	MDB_ID2L	dl = txn->mt_u.dirty_list;
-	unsigned	psize = env->me_psize, j;
-	int			i, pagecount = dl[0].mid, rc;
-	size_t		size = 0, pos = 0;
-	pgno_t		pgno = 0;
-	MDB_page	*dp = NULL;
-#ifdef _WIN32
-	OVERLAPPED	ov;
-#else
-	struct iovec iov[MDB_COMMIT_PAGES];
-	ssize_t		wpos = 0, wsize = 0, wres;
-	size_t		next_pos = 1; /* impossible pos, so pos != next_pos */
-	int			n = 0;
-#endif
-
-	j = i = keep;
-
-	if (env->me_flags & MDB_WRITEMAP) {
-		/* Clear dirty flags */
-		while (++i <= pagecount) {
-			dp = dl[i].mptr;
-			/* Don't flush this page yet */
-			if (dp->mp_flags & (P_LOOSE|P_KEEP)) {
-				dp->mp_flags &= ~P_KEEP;
-				dl[++j] = dl[i];
-				continue;
-			}
-			dp->mp_flags &= ~P_DIRTY;
-		}
-		goto done;
-	}
-
-	/* Write the pages */
-	for (;;) {
-		if (++i <= pagecount) {
-			dp = dl[i].mptr;
-			/* Don't flush this page yet */
-			if (dp->mp_flags & (P_LOOSE|P_KEEP)) {
-				dp->mp_flags &= ~P_KEEP;
-				dl[i].mid = 0;
-				continue;
-			}
-			pgno = dl[i].mid;
-			/* clear dirty flag */
-			dp->mp_flags &= ~P_DIRTY;
-			pos = pgno * psize;
-			size = psize;
-			if (IS_OVERFLOW(dp)) size *= dp->mp_pages;
-		}
-#ifdef _WIN32
-		else break;
-
-		/* Windows actually supports scatter/gather I/O, but only on
-		 * unbuffered file handles. Since we're relying on the OS page
-		 * cache for all our data, that's self-defeating. So we just
-		 * write pages one at a time. We use the ov structure to set
-		 * the write offset, to at least save the overhead of a Seek
-		 * system call.
-		 */
-		DPRINTF(("committing page %"Z"u", pgno));
-		memset(&ov, 0, sizeof(ov));
-		ov.Offset = pos & 0xffffffff;
-		ov.OffsetHigh = pos >> 16 >> 16;
-		if (!WriteFile(env->me_fd, dp, size, NULL, &ov)) {
-			rc = ErrCode();
-			DPRINTF(("WriteFile: %d", rc));
-			return rc;
-		}
-#else
-		/* Write up to MDB_COMMIT_PAGES dirty pages at a time. */
-		if (pos!=next_pos || n==MDB_COMMIT_PAGES || wsize+size>MAX_WRITE) {
-			if (n) {
-retry_write:
-				/* Write previous page(s) */
-#ifdef MDB_USE_PWRITEV
-				wres = pwritev(env->me_fd, iov, n, wpos);
-#else
-				if (n == 1) {
-					wres = pwrite(env->me_fd, iov[0].iov_base, wsize, wpos);
-				} else {
-retry_seek:
-					if (lseek(env->me_fd, wpos, SEEK_SET) == -1) {
-						rc = ErrCode();
-						if (rc == EINTR)
-							goto retry_seek;
-						DPRINTF(("lseek: %s", strerror(rc)));
-						return rc;
-					}
-					wres = writev(env->me_fd, iov, n);
-				}
-#endif
-				if (wres != wsize) {
-					if (wres < 0) {
-						rc = ErrCode();
-						if (rc == EINTR)
-							goto retry_write;
-						DPRINTF(("Write error: %s", strerror(rc)));
-					} else {
-						rc = EIO; /* TODO: Use which error code? */
-						DPUTS("short write, filesystem full?");
-					}
-					return rc;
-				}
-				n = 0;
-			}
-			if (i > pagecount)
-				break;
-			wpos = pos;
-			wsize = 0;
-		}
-		DPRINTF(("committing page %"Z"u", pgno));
-		next_pos = pos + size;
-		iov[n].iov_len = size;
-		iov[n].iov_base = (char *)dp;
-		wsize += size;
-		n++;
-#endif	/* _WIN32 */
-	}
-
-	/* MIPS has cache coherency issues, this is a no-op everywhere else
-	 * Note: for any size >= on-chip cache size, entire on-chip cache is
-	 * flushed.
-	 */
-	CACHEFLUSH(env->me_map, txn->mt_next_pgno * env->me_psize, DCACHE);
-
-	for (i = keep; ++i <= pagecount; ) {
-		dp = dl[i].mptr;
-		/* This is a page we skipped above */
-		if (!dl[i].mid) {
-			dl[++j] = dl[i];
-			dl[j].mid = dp->mp_pgno;
-			continue;
-		}
-		mdb_dpage_free(env, dp);
-	}
-
-done:
-	i--;
-	txn->mt_dirty_room += i - j;
-	dl[0].mid = j;
-	return MDB_SUCCESS;
-}
-
-int
-mdb_txn_commit(MDB_txn *txn)
-{
-	int		rc;
-	unsigned int i, end_mode;
-	MDB_env	*env;
-
-	if (txn == NULL)
-		return EINVAL;
-
-	/* mdb_txn_end() mode for a commit which writes nothing */
-	end_mode = MDB_END_EMPTY_COMMIT|MDB_END_UPDATE|MDB_END_SLOT|MDB_END_FREE;
-
-	if (txn->mt_child) {
-		rc = mdb_txn_commit(txn->mt_child);
-		if (rc)
-			goto fail;
-	}
-
-	env = txn->mt_env;
-
-	if (F_ISSET(txn->mt_flags, MDB_TXN_RDONLY)) {
-		goto done;
-	}
-
-	if (txn->mt_flags & (MDB_TXN_FINISHED|MDB_TXN_ERROR)) {
-		DPUTS("txn has failed/finished, can't commit");
-		if (txn->mt_parent)
-			txn->mt_parent->mt_flags |= MDB_TXN_ERROR;
-		rc = MDB_BAD_TXN;
-		goto fail;
-	}
-
-	if (txn->mt_parent) {
-		MDB_txn *parent = txn->mt_parent;
-		MDB_page **lp;
-		MDB_ID2L dst, src;
-		MDB_IDL pspill;
-		unsigned x, y, len, ps_len;
-
-		/* Append our free list to parent's */
-		rc = mdb_midl_append_list(&parent->mt_free_pgs, txn->mt_free_pgs);
-		if (rc)
-			goto fail;
-		mdb_midl_free(txn->mt_free_pgs);
-		/* Failures after this must either undo the changes
-		 * to the parent or set MDB_TXN_ERROR in the parent.
-		 */
-
-		parent->mt_next_pgno = txn->mt_next_pgno;
-		parent->mt_flags = txn->mt_flags;
-
-		/* Merge our cursors into parent's and close them */
-		mdb_cursors_close(txn, 1);
-
-		/* Update parent's DB table. */
-		memcpy(parent->mt_dbs, txn->mt_dbs, txn->mt_numdbs * sizeof(MDB_db));
-		parent->mt_numdbs = txn->mt_numdbs;
-		parent->mt_dbflags[FREE_DBI] = txn->mt_dbflags[FREE_DBI];
-		parent->mt_dbflags[MAIN_DBI] = txn->mt_dbflags[MAIN_DBI];
-		for (i=CORE_DBS; i<txn->mt_numdbs; i++) {
-			/* preserve parent's DB_NEW status */
-			x = parent->mt_dbflags[i] & DB_NEW;
-			parent->mt_dbflags[i] = txn->mt_dbflags[i] | x;
-		}
-
-		dst = parent->mt_u.dirty_list;
-		src = txn->mt_u.dirty_list;
-		/* Remove anything in our dirty list from parent's spill list */
-		if ((pspill = parent->mt_spill_pgs) && (ps_len = pspill[0])) {
-			x = y = ps_len;
-			pspill[0] = (pgno_t)-1;
-			/* Mark our dirty pages as deleted in parent spill list */
-			for (i=0, len=src[0].mid; ++i <= len; ) {
-				MDB_ID pn = src[i].mid << 1;
-				while (pn > pspill[x])
-					x--;
-				if (pn == pspill[x]) {
-					pspill[x] = 1;
-					y = --x;
-				}
-			}
-			/* Squash deleted pagenums if we deleted any */
-			for (x=y; ++x <= ps_len; )
-				if (!(pspill[x] & 1))
-					pspill[++y] = pspill[x];
-			pspill[0] = y;
-		}
-
-		/* Remove anything in our spill list from parent's dirty list */
-		if (txn->mt_spill_pgs && txn->mt_spill_pgs[0]) {
-			for (i=1; i<=txn->mt_spill_pgs[0]; i++) {
-				MDB_ID pn = txn->mt_spill_pgs[i];
-				if (pn & 1)
-					continue;	/* deleted spillpg */
-				pn >>= 1;
-				y = mdb_mid2l_search(dst, pn);
-				if (y <= dst[0].mid && dst[y].mid == pn) {
-					free(dst[y].mptr);
-					while (y < dst[0].mid) {
-						dst[y] = dst[y+1];
-						y++;
-					}
-					dst[0].mid--;
-				}
-			}
-		}
-
-		/* Find len = length of merging our dirty list with parent's */
-		x = dst[0].mid;
-		dst[0].mid = 0;		/* simplify loops */
-		if (parent->mt_parent) {
-			len = x + src[0].mid;
-			y = mdb_mid2l_search(src, dst[x].mid + 1) - 1;
-			for (i = x; y && i; y--) {
-				pgno_t yp = src[y].mid;
-				while (yp < dst[i].mid)
-					i--;
-				if (yp == dst[i].mid) {
-					i--;
-					len--;
-				}
-			}
-		} else { /* Simplify the above for single-ancestor case */
-			len = MDB_IDL_UM_MAX - txn->mt_dirty_room;
-		}
-		/* Merge our dirty list with parent's */
-		y = src[0].mid;
-		for (i = len; y; dst[i--] = src[y--]) {
-			pgno_t yp = src[y].mid;
-			while (yp < dst[x].mid)
-				dst[i--] = dst[x--];
-			if (yp == dst[x].mid)
-				free(dst[x--].mptr);
-		}
-		mdb_tassert(txn, i == x);
-		dst[0].mid = len;
-		free(txn->mt_u.dirty_list);
-		parent->mt_dirty_room = txn->mt_dirty_room;
-		if (txn->mt_spill_pgs) {
-			if (parent->mt_spill_pgs) {
-				/* TODO: Prevent failure here, so parent does not fail */
-				rc = mdb_midl_append_list(&parent->mt_spill_pgs, txn->mt_spill_pgs);
-				if (rc)
-					parent->mt_flags |= MDB_TXN_ERROR;
-				mdb_midl_free(txn->mt_spill_pgs);
-				mdb_midl_sort(parent->mt_spill_pgs);
-			} else {
-				parent->mt_spill_pgs = txn->mt_spill_pgs;
-			}
-		}
-
-		/* Append our loose page list to parent's */
-		for (lp = &parent->mt_loose_pgs; *lp; lp = &NEXT_LOOSE_PAGE(*lp))
-			;
-		*lp = txn->mt_loose_pgs;
-		parent->mt_loose_count += txn->mt_loose_count;
-
-		parent->mt_child = NULL;
-		mdb_midl_free(((MDB_ntxn *)txn)->mnt_pgstate.mf_pghead);
-		free(txn);
-		return rc;
-	}
-
-	if (txn != env->me_txn) {
-		DPUTS("attempt to commit unknown transaction");
-		rc = EINVAL;
-		goto fail;
-	}
-
-	mdb_cursors_close(txn, 0);
-
-	if (!txn->mt_u.dirty_list[0].mid &&
-		!(txn->mt_flags & (MDB_TXN_DIRTY|MDB_TXN_SPILLS)))
-		goto done;
-
-	DPRINTF(("committing txn %"Z"u %p on mdbenv %p, root page %"Z"u",
-	    txn->mt_txnid, (void*)txn, (void*)env, txn->mt_dbs[MAIN_DBI].md_root));
-
-	/* Update DB root pointers */
-	if (txn->mt_numdbs > CORE_DBS) {
-		MDB_cursor mc;
-		MDB_dbi i;
-		MDB_val data;
-		data.mv_size = sizeof(MDB_db);
-
-		mdb_cursor_init(&mc, txn, MAIN_DBI, NULL);
-		for (i = CORE_DBS; i < txn->mt_numdbs; i++) {
-			if (txn->mt_dbflags[i] & DB_DIRTY) {
-				if (TXN_DBI_CHANGED(txn, i)) {
-					rc = MDB_BAD_DBI;
-					goto fail;
-				}
-				data.mv_data = &txn->mt_dbs[i];
-				rc = mdb_cursor_put(&mc, &txn->mt_dbxs[i].md_name, &data,
-					F_SUBDATA);
-				if (rc)
-					goto fail;
-			}
-		}
-	}
-
-	rc = mdb_freelist_save(txn);
-	if (rc)
-		goto fail;
-
-	mdb_midl_free(env->me_pghead);
-	env->me_pghead = NULL;
-	mdb_midl_shrink(&txn->mt_free_pgs);
-
-#if (MDB_DEBUG) > 2
-	mdb_audit(txn);
-#endif
-
-	if ((rc = mdb_page_flush(txn, 0)) ||
-		(rc = mdb_env_sync(env, 0)) ||
-		(rc = mdb_env_write_meta(txn)))
-		goto fail;
-	end_mode = MDB_END_COMMITTED|MDB_END_UPDATE;
-
-done:
-	mdb_txn_end(txn, end_mode);
-	return MDB_SUCCESS;
-
-fail:
-	mdb_txn_abort(txn);
-	return rc;
-}
-
-/** Read the environment parameters of a DB environment before
- * mapping it into memory.
- * @param[in] env the environment handle
- * @param[out] meta address of where to store the meta information
- * @return 0 on success, non-zero on failure.
- */
-static int ESECT
-mdb_env_read_header(MDB_env *env, MDB_meta *meta)
-{
-	MDB_metabuf	pbuf;
-	MDB_page	*p;
-	MDB_meta	*m;
-	int			i, rc, off;
-	enum { Size = sizeof(pbuf) };
-
-	/* We don't know the page size yet, so use a minimum value.
-	 * Read both meta pages so we can use the latest one.
-	 */
-
-	for (i=off=0; i<NUM_METAS; i++, off += meta->mm_psize) {
-#ifdef _WIN32
-		DWORD len;
-		OVERLAPPED ov;
-		memset(&ov, 0, sizeof(ov));
-		ov.Offset = off;
-		rc = ReadFile(env->me_fd, &pbuf, Size, &len, &ov) ? (int)len : -1;
-		if (rc == -1 && ErrCode() == ERROR_HANDLE_EOF)
-			rc = 0;
-#else
-		rc = pread(env->me_fd, &pbuf, Size, off);
-#endif
-		if (rc != Size) {
-			if (rc == 0 && off == 0)
-				return ENOENT;
-			rc = rc < 0 ? (int) ErrCode() : MDB_INVALID;
-			DPRINTF(("read: %s", mdb_strerror(rc)));
-			return rc;
-		}
-
-		p = (MDB_page *)&pbuf;
-
-		if (!F_ISSET(p->mp_flags, P_META)) {
-			DPRINTF(("page %"Z"u not a meta page", p->mp_pgno));
-			return MDB_INVALID;
-		}
-
-		m = METADATA(p);
-		if (m->mm_magic != MDB_MAGIC) {
-			DPUTS("meta has invalid magic");
-			return MDB_INVALID;
-		}
-
-		if (m->mm_version != MDB_DATA_VERSION) {
-			DPRINTF(("database is version %u, expected version %u",
-				m->mm_version, MDB_DATA_VERSION));
-			return MDB_VERSION_MISMATCH;
-		}
-
-		if (off == 0 || m->mm_txnid > meta->mm_txnid)
-			*meta = *m;
-	}
-	return 0;
-}
-
-/** Fill in most of the zeroed #MDB_meta for an empty database environment */
-static void ESECT
-mdb_env_init_meta0(MDB_env *env, MDB_meta *meta)
-{
-	meta->mm_magic = MDB_MAGIC;
-	meta->mm_version = MDB_DATA_VERSION;
-	meta->mm_mapsize = env->me_mapsize;
-	meta->mm_psize = env->me_psize;
-	meta->mm_last_pg = NUM_METAS-1;
-	meta->mm_flags = env->me_flags & 0xffff;
-	meta->mm_flags |= MDB_INTEGERKEY; /* this is mm_dbs[FREE_DBI].md_flags */
-	meta->mm_dbs[FREE_DBI].md_root = P_INVALID;
-	meta->mm_dbs[MAIN_DBI].md_root = P_INVALID;
-}
-
-/** Write the environment parameters of a freshly created DB environment.
- * @param[in] env the environment handle
- * @param[in] meta the #MDB_meta to write
- * @return 0 on success, non-zero on failure.
- */
-static int ESECT
-mdb_env_init_meta(MDB_env *env, MDB_meta *meta)
-{
-	MDB_page *p, *q;
-	int rc;
-	unsigned int	 psize;
-#ifdef _WIN32
-	DWORD len;
-	OVERLAPPED ov;
-	memset(&ov, 0, sizeof(ov));
-#define DO_PWRITE(rc, fd, ptr, size, len, pos)	do { \
-	ov.Offset = pos;	\
-	rc = WriteFile(fd, ptr, size, &len, &ov);	} while(0)
-#else
-	int len;
-#define DO_PWRITE(rc, fd, ptr, size, len, pos)	do { \
-	len = pwrite(fd, ptr, size, pos);	\
-	if (len == -1 && ErrCode() == EINTR) continue; \
-	rc = (len >= 0); break; } while(1)
-#endif
-
-	DPUTS("writing new meta page");
-
-	psize = env->me_psize;
-
-	p = calloc(NUM_METAS, psize);
-	if (!p)
-		return ENOMEM;
-
-	p->mp_pgno = 0;
-	p->mp_flags = P_META;
-	*(MDB_meta *)METADATA(p) = *meta;
-
-	q = (MDB_page *)((char *)p + psize);
-	q->mp_pgno = 1;
-	q->mp_flags = P_META;
-	*(MDB_meta *)METADATA(q) = *meta;
-
-	DO_PWRITE(rc, env->me_fd, p, psize * NUM_METAS, len, 0);
-	if (!rc)
-		rc = ErrCode();
-	else if ((unsigned) len == psize * NUM_METAS)
-		rc = MDB_SUCCESS;
-	else
-		rc = ENOSPC;
-	free(p);
-	return rc;
-}
-
-/** Update the environment info to commit a transaction.
- * @param[in] txn the transaction that's being committed
- * @return 0 on success, non-zero on failure.
- */
-static int
-mdb_env_write_meta(MDB_txn *txn)
-{
-	MDB_env *env;
-	MDB_meta	meta, metab, *mp;
-	unsigned flags;
-	size_t mapsize;
-	off_t off;
-	int rc, len, toggle;
-	char *ptr;
-	HANDLE mfd;
-#ifdef _WIN32
-	OVERLAPPED ov;
-#else
-	int r2;
-#endif
-
-	toggle = txn->mt_txnid & 1;
-	DPRINTF(("writing meta page %d for root page %"Z"u",
-		toggle, txn->mt_dbs[MAIN_DBI].md_root));
-
-	env = txn->mt_env;
-	flags = env->me_flags;
-	mp = env->me_metas[toggle];
-	mapsize = env->me_metas[toggle ^ 1]->mm_mapsize;
-	/* Persist any increases of mapsize config */
-	if (mapsize < env->me_mapsize)
-		mapsize = env->me_mapsize;
-
-	if (flags & MDB_WRITEMAP) {
-		mp->mm_mapsize = mapsize;
-		mp->mm_dbs[FREE_DBI] = txn->mt_dbs[FREE_DBI];
-		mp->mm_dbs[MAIN_DBI] = txn->mt_dbs[MAIN_DBI];
-		mp->mm_last_pg = txn->mt_next_pgno - 1;
-#if (__GNUC__ * 100 + __GNUC_MINOR__ >= 404) && /* TODO: portability */	\
-	!(defined(__i386__) || defined(__x86_64__))
-		/* LY: issue a memory barrier, if not x86. ITS#7969 */
-		__sync_synchronize();
-#endif
-		mp->mm_txnid = txn->mt_txnid;
-		if (!(flags & (MDB_NOMETASYNC|MDB_NOSYNC))) {
-			unsigned meta_size = env->me_psize;
-			rc = (env->me_flags & MDB_MAPASYNC) ? MS_ASYNC : MS_SYNC;
-			ptr = (char *)mp - PAGEHDRSZ;
-#ifndef _WIN32	/* POSIX msync() requires ptr = start of OS page */
-			r2 = (ptr - env->me_map) & (env->me_os_psize - 1);
-			ptr -= r2;
-			meta_size += r2;
-#endif
-			if (MDB_MSYNC(ptr, meta_size, rc)) {
-				rc = ErrCode();
-				goto fail;
-			}
-		}
-		goto done;
-	}
-	metab.mm_txnid = mp->mm_txnid;
-	metab.mm_last_pg = mp->mm_last_pg;
-
-	meta.mm_mapsize = mapsize;
-	meta.mm_dbs[FREE_DBI] = txn->mt_dbs[FREE_DBI];
-	meta.mm_dbs[MAIN_DBI] = txn->mt_dbs[MAIN_DBI];
-	meta.mm_last_pg = txn->mt_next_pgno - 1;
-	meta.mm_txnid = txn->mt_txnid;
-
-	off = offsetof(MDB_meta, mm_mapsize);
-	ptr = (char *)&meta + off;
-	len = sizeof(MDB_meta) - off;
-	off += (char *)mp - env->me_map;
-
-	/* Write to the SYNC fd unless MDB_NOSYNC/MDB_NOMETASYNC.
-	 * (me_mfd goes to the same file as me_fd, but writing to it
-	 * also syncs to disk.  Avoids a separate fdatasync() call.)
-	 */
-	mfd = (flags & (MDB_NOSYNC|MDB_NOMETASYNC)) ? env->me_fd : env->me_mfd;
-#ifdef _WIN32
-	{
-		memset(&ov, 0, sizeof(ov));
-		ov.Offset = off;
-		if (!WriteFile(mfd, ptr, len, (DWORD *)&rc, &ov))
-			rc = -1;
-	}
-#else
-retry_write:
-	rc = pwrite(mfd, ptr, len, off);
-#endif
-	if (rc != len) {
-		rc = rc < 0 ? ErrCode() : EIO;
-#ifndef _WIN32
-		if (rc == EINTR)
-			goto retry_write;
-#endif
-		DPUTS("write failed, disk error?");
-		/* On a failure, the pagecache still contains the new data.
-		 * Write some old data back, to prevent it from being used.
-		 * Use the non-SYNC fd; we know it will fail anyway.
-		 */
-		meta.mm_last_pg = metab.mm_last_pg;
-		meta.mm_txnid = metab.mm_txnid;
-#ifdef _WIN32
-		memset(&ov, 0, sizeof(ov));
-		ov.Offset = off;
-		WriteFile(env->me_fd, ptr, len, NULL, &ov);
-#else
-		r2 = pwrite(env->me_fd, ptr, len, off);
-		(void)r2;	/* Silence warnings. We don't care about pwrite's return value */
-#endif
-fail:
-		env->me_flags |= MDB_FATAL_ERROR;
-		return rc;
-	}
-	/* MIPS has cache coherency issues, this is a no-op everywhere else */
-	CACHEFLUSH(env->me_map + off, len, DCACHE);
-done:
-	/* Memory ordering issues are irrelevant; since the entire writer
-	 * is wrapped by wmutex, all of these changes will become visible
-	 * after the wmutex is unlocked. Since the DB is multi-version,
-	 * readers will get consistent data regardless of how fresh or
-	 * how stale their view of these values is.
-	 */
-	if (env->me_txns)
-		env->me_txns->mti_txnid = txn->mt_txnid;
-
-	return MDB_SUCCESS;
-}
-
-/** Check both meta pages to see which one is newer.
- * @param[in] env the environment handle
- * @return newest #MDB_meta.
- */
-static MDB_meta *
-mdb_env_pick_meta(const MDB_env *env)
-{
-	MDB_meta *const *metas = env->me_metas;
-	return metas[ metas[0]->mm_txnid < metas[1]->mm_txnid ];
-}
-
-int ESECT
-mdb_env_create(MDB_env **env)
-{
-	MDB_env *e;
-
-	e = calloc(1, sizeof(MDB_env));
-	if (!e)
-		return ENOMEM;
-
-	e->me_maxreaders = DEFAULT_READERS;
-	e->me_maxdbs = e->me_numdbs = CORE_DBS;
-	e->me_fd = INVALID_HANDLE_VALUE;
-	e->me_lfd = INVALID_HANDLE_VALUE;
-	e->me_mfd = INVALID_HANDLE_VALUE;
-#ifdef MDB_USE_POSIX_SEM
-	e->me_rmutex = SEM_FAILED;
-	e->me_wmutex = SEM_FAILED;
-#endif
-	e->me_pid = getpid();
-	GET_PAGESIZE(e->me_os_psize);
-	VGMEMP_CREATE(e,0,0);
-	*env = e;
-	return MDB_SUCCESS;
-}
-
-static int ESECT
-mdb_env_map(MDB_env *env, void *addr)
-{
-	MDB_page *p;
-	unsigned int flags = env->me_flags;
-#ifdef _WIN32
-	int rc;
-	HANDLE mh;
-	LONG sizelo, sizehi;
-	size_t msize;
-
-	if (flags & MDB_RDONLY) {
-		/* Don't set explicit map size, use whatever exists */
-		msize = 0;
-		sizelo = 0;
-		sizehi = 0;
-	} else {
-		msize = env->me_mapsize;
-		sizelo = msize & 0xffffffff;
-		sizehi = msize >> 16 >> 16; /* only needed on Win64 */
-
-		/* Windows won't create mappings for zero length files.
-		 * and won't map more than the file size.
-		 * Just set the maxsize right now.
-		 */
-		if (SetFilePointer(env->me_fd, sizelo, &sizehi, 0) != (DWORD)sizelo
-			|| !SetEndOfFile(env->me_fd)
-			|| SetFilePointer(env->me_fd, 0, NULL, 0) != 0)
-			return ErrCode();
-	}
-
-	mh = CreateFileMapping(env->me_fd, NULL, flags & MDB_WRITEMAP ?
-		PAGE_READWRITE : PAGE_READONLY,
-		sizehi, sizelo, NULL);
-	if (!mh)
-		return ErrCode();
-	env->me_map = MapViewOfFileEx(mh, flags & MDB_WRITEMAP ?
-		FILE_MAP_WRITE : FILE_MAP_READ,
-		0, 0, msize, addr);
-	rc = env->me_map ? 0 : ErrCode();
-	CloseHandle(mh);
-	if (rc)
-		return rc;
-#else
-	int prot = PROT_READ;
-	if (flags & MDB_WRITEMAP) {
-		prot |= PROT_WRITE;
-		if (ftruncate(env->me_fd, env->me_mapsize) < 0)
-			return ErrCode();
-	}
-	env->me_map = mmap(addr, env->me_mapsize, prot, MAP_SHARED,
-		env->me_fd, 0);
-	if (env->me_map == MAP_FAILED) {
-		env->me_map = NULL;
-		return ErrCode();
-	}
-
-	if (flags & MDB_NORDAHEAD) {
-		/* Turn off readahead. It's harmful when the DB is larger than RAM. */
-#ifdef MADV_RANDOM
-		madvise(env->me_map, env->me_mapsize, MADV_RANDOM);
-#else
-#ifdef POSIX_MADV_RANDOM
-		posix_madvise(env->me_map, env->me_mapsize, POSIX_MADV_RANDOM);
-#endif /* POSIX_MADV_RANDOM */
-#endif /* MADV_RANDOM */
-	}
-#endif /* _WIN32 */
-
-	/* Can happen because the address argument to mmap() is just a
-	 * hint.  mmap() can pick another, e.g. if the range is in use.
-	 * The MAP_FIXED flag would prevent that, but then mmap could
-	 * instead unmap existing pages to make room for the new map.
-	 */
-	if (addr && env->me_map != addr)
-		return EBUSY;	/* TODO: Make a new MDB_* error code? */
-
-	p = (MDB_page *)env->me_map;
-	env->me_metas[0] = METADATA(p);
-	env->me_metas[1] = (MDB_meta *)((char *)env->me_metas[0] + env->me_psize);
-
-	return MDB_SUCCESS;
-}
-
-int ESECT
-mdb_env_set_mapsize(MDB_env *env, size_t size)
-{
-	/* If env is already open, caller is responsible for making
-	 * sure there are no active txns.
-	 */
-	if (env->me_map) {
-		int rc;
-		MDB_meta *meta;
-		void *old;
-		if (env->me_txn)
-			return EINVAL;
-		meta = mdb_env_pick_meta(env);
-		if (!size)
-			size = meta->mm_mapsize;
-		{
-			/* Silently round up to minimum if the size is too small */
-			size_t minsize = (meta->mm_last_pg + 1) * env->me_psize;
-			if (size < minsize)
-				size = minsize;
-		}
-		munmap(env->me_map, env->me_mapsize);
-		env->me_mapsize = size;
-		old = (env->me_flags & MDB_FIXEDMAP) ? env->me_map : NULL;
-		rc = mdb_env_map(env, old);
-		if (rc)
-			return rc;
-	}
-	env->me_mapsize = size;
-	if (env->me_psize)
-		env->me_maxpg = env->me_mapsize / env->me_psize;
-	return MDB_SUCCESS;
-}
-
-int ESECT
-mdb_env_set_maxdbs(MDB_env *env, MDB_dbi dbs)
-{
-	if (env->me_map)
-		return EINVAL;
-	env->me_maxdbs = dbs + CORE_DBS;
-	return MDB_SUCCESS;
-}
-
-int ESECT
-mdb_env_set_maxreaders(MDB_env *env, unsigned int readers)
-{
-	if (env->me_map || readers < 1)
-		return EINVAL;
-	env->me_maxreaders = readers;
-	return MDB_SUCCESS;
-}
-
-int ESECT
-mdb_env_get_maxreaders(MDB_env *env, unsigned int *readers)
-{
-	if (!env || !readers)
-		return EINVAL;
-	*readers = env->me_maxreaders;
-	return MDB_SUCCESS;
-}
-
-static int ESECT
-mdb_fsize(HANDLE fd, size_t *size)
-{
-#ifdef _WIN32
-	LARGE_INTEGER fsize;
-
-	if (!GetFileSizeEx(fd, &fsize))
-		return ErrCode();
-
-	*size = fsize.QuadPart;
-#else
-	struct stat st;
-
-	if (fstat(fd, &st))
-		return ErrCode();
-
-	*size = st.st_size;
-#endif
-	return MDB_SUCCESS;
-}
-
-
-#ifdef _WIN32
-typedef wchar_t	mdb_nchar_t;
-# define MDB_NAME(str)	L##str
-# define mdb_name_cpy	wcscpy
-#else
-/** Character type for file names: char on Unix, wchar_t on Windows */
-typedef char	mdb_nchar_t;
-# define MDB_NAME(str)	str		/**< #mdb_nchar_t[] string literal */
-# define mdb_name_cpy	strcpy	/**< Copy name (#mdb_nchar_t string) */
-#endif
-
-/** Filename - string of #mdb_nchar_t[] */
-typedef struct MDB_name {
-	int mn_len;					/**< Length  */
-	int mn_alloced;				/**< True if #mn_val was malloced */
-	mdb_nchar_t	*mn_val;		/**< Contents */
-} MDB_name;
-
-/** Filename suffixes [datafile,lockfile][without,with MDB_NOSUBDIR] */
-static const mdb_nchar_t *const mdb_suffixes[2][2] = {
-	{ MDB_NAME("/data.mdb"), MDB_NAME("")      },
-	{ MDB_NAME("/lock.mdb"), MDB_NAME("-lock") }
-};
-
-#define MDB_SUFFLEN 9	/**< Max string length in #mdb_suffixes[] */
-
-/** Set up filename + scratch area for filename suffix, for opening files.
- * It should be freed with #mdb_fname_destroy().
- * On Windows, paths are converted from char *UTF-8 to wchar_t *UTF-16.
- *
- * @param[in] path Pathname for #mdb_env_open().
- * @param[in] envflags Whether a subdir and/or lockfile will be used.
- * @param[out] fname Resulting filename, with room for a suffix if necessary.
- */
-static int ESECT
-mdb_fname_init(const char *path, unsigned envflags, MDB_name *fname)
-{
-	int no_suffix = F_ISSET(envflags, MDB_NOSUBDIR|MDB_NOLOCK);
-	fname->mn_alloced = 0;
-#ifdef _WIN32
-	return utf8_to_utf16(path, fname, no_suffix ? 0 : MDB_SUFFLEN);
-#else
-	fname->mn_len = strlen(path);
-	if (no_suffix)
-		fname->mn_val = (char *) path;
-	else if ((fname->mn_val = malloc(fname->mn_len + MDB_SUFFLEN+1)) != NULL) {
-		fname->mn_alloced = 1;
-		strcpy(fname->mn_val, path);
-	}
-	else
-		return ENOMEM;
-	return MDB_SUCCESS;
-#endif
-}
-
-/** Destroy \b fname from #mdb_fname_init() */
-#define mdb_fname_destroy(fname) \
-	do { if ((fname).mn_alloced) free((fname).mn_val); } while (0)
-
-#ifdef O_CLOEXEC /* POSIX.1-2008: Set FD_CLOEXEC atomically at open() */
-# define MDB_CLOEXEC		O_CLOEXEC
-#else
-# define MDB_CLOEXEC		0
-#endif
-
-/** File type, access mode etc. for #mdb_fopen() */
-enum mdb_fopen_type {
-#ifdef _WIN32
-	MDB_O_RDONLY, MDB_O_RDWR, MDB_O_META, MDB_O_COPY, MDB_O_LOCKS
-#else
-	/* A comment in mdb_fopen() explains some O_* flag choices. */
-	MDB_O_RDONLY= O_RDONLY,                            /**< for RDONLY me_fd */
-	MDB_O_RDWR  = O_RDWR  |O_CREAT,                    /**< for me_fd */
-	MDB_O_META  = O_WRONLY|MDB_DSYNC     |MDB_CLOEXEC, /**< for me_mfd */
-	MDB_O_COPY  = O_WRONLY|O_CREAT|O_EXCL|MDB_CLOEXEC, /**< for #mdb_env_copy() */
-	/** Bitmask for open() flags in enum #mdb_fopen_type.  The other bits
-	 * distinguish otherwise-equal MDB_O_* constants from each other.
-	 */
-	MDB_O_MASK  = MDB_O_RDWR|MDB_CLOEXEC | MDB_O_RDONLY|MDB_O_META|MDB_O_COPY,
-	MDB_O_LOCKS = MDB_O_RDWR|MDB_CLOEXEC | ((MDB_O_MASK+1) & ~MDB_O_MASK) /**< for me_lfd */
-#endif
-};
-
-/** Open an LMDB file.
- * @param[in] env	The LMDB environment.
- * @param[in,out] fname	Path from from #mdb_fname_init().  A suffix is
- * appended if necessary to create the filename, without changing mn_len.
- * @param[in] which	Determines file type, access mode, etc.
- * @param[in] mode	The Unix permissions for the file, if we create it.
- * @param[out] res	Resulting file handle.
- * @return 0 on success, non-zero on failure.
- */
-static int ESECT
-mdb_fopen(const MDB_env *env, MDB_name *fname,
-	enum mdb_fopen_type which, mdb_mode_t mode,
-	HANDLE *res)
-{
-	int rc = MDB_SUCCESS;
-	HANDLE fd;
-#ifdef _WIN32
-	DWORD acc, share, disp, attrs;
-#else
-	int flags;
-#endif
-
-	if (fname->mn_alloced)		/* modifiable copy */
-		mdb_name_cpy(fname->mn_val + fname->mn_len,
-			mdb_suffixes[which==MDB_O_LOCKS][F_ISSET(env->me_flags, MDB_NOSUBDIR)]);
-
-	/* The directory must already exist.  Usually the file need not.
-	 * MDB_O_META requires the file because we already created it using
-	 * MDB_O_RDWR.  MDB_O_COPY must not overwrite an existing file.
-	 *
-	 * With MDB_O_COPY we do not want the OS to cache the writes, since
-	 * the source data is already in the OS cache.
-	 *
-	 * The lockfile needs FD_CLOEXEC (close file descriptor on exec*())
-	 * to avoid the flock() issues noted under Caveats in lmdb.h.
-	 * Also set it for other filehandles which the user cannot get at
-	 * and close himself, which he may need after fork().  I.e. all but
-	 * me_fd, which programs do use via mdb_env_get_fd().
-	 */
-
-#ifdef _WIN32
-	acc = GENERIC_READ|GENERIC_WRITE;
-	share = FILE_SHARE_READ|FILE_SHARE_WRITE;
-	disp = OPEN_ALWAYS;
-	attrs = FILE_ATTRIBUTE_NORMAL;
-	switch (which) {
-	case MDB_O_RDONLY:			/* read-only datafile */
-		acc = GENERIC_READ;
-		disp = OPEN_EXISTING;
-		break;
-	case MDB_O_META:			/* for writing metapages */
-		acc = GENERIC_WRITE;
-		disp = OPEN_EXISTING;
-		attrs = FILE_ATTRIBUTE_NORMAL|FILE_FLAG_WRITE_THROUGH;
-		break;
-	case MDB_O_COPY:			/* mdb_env_copy() & co */
-		acc = GENERIC_WRITE;
-		share = 0;
-		disp = CREATE_NEW;
-		attrs = FILE_FLAG_NO_BUFFERING|FILE_FLAG_WRITE_THROUGH;
-		break;
-	default: break;	/* silence gcc -Wswitch (not all enum values handled) */
-	}
-	fd = CreateFileW(fname->mn_val, acc, share, NULL, disp, attrs, NULL);
-#else
-	fd = open(fname->mn_val, which & MDB_O_MASK, mode);
-#endif
-
-	if (fd == INVALID_HANDLE_VALUE)
-		rc = ErrCode();
-#ifndef _WIN32
-	else {
-		if (which != MDB_O_RDONLY && which != MDB_O_RDWR) {
-			/* Set CLOEXEC if we could not pass it to open() */
-			if (!MDB_CLOEXEC && (flags = fcntl(fd, F_GETFD)) != -1)
-				(void) fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
-		}
-		if (which == MDB_O_COPY && env->me_psize >= env->me_os_psize) {
-			/* This may require buffer alignment.  There is no portable
-			 * way to ask how much, so we require OS pagesize alignment.
-			 */
-# ifdef F_NOCACHE	/* __APPLE__ */
-			(void) fcntl(fd, F_NOCACHE, 1);
-# elif defined O_DIRECT
-			/* open(...O_DIRECT...) would break on filesystems without
-			 * O_DIRECT support (ITS#7682). Try to set it here instead.
-			 */
-			if ((flags = fcntl(fd, F_GETFL)) != -1)
-				(void) fcntl(fd, F_SETFL, flags | O_DIRECT);
-# endif
-		}
-	}
-#endif	/* !_WIN32 */
-
-	*res = fd;
-	return rc;
-}
-
-
-#ifdef BROKEN_FDATASYNC
-#include <sys/utsname.h>
-#include <sys/vfs.h>
-#endif
-
-/** Further setup required for opening an LMDB environment
- */
-static int ESECT
-mdb_env_open2(MDB_env *env)
-{
-	unsigned int flags = env->me_flags;
-	int i, newenv = 0, rc;
-	MDB_meta meta;
-
-#ifdef _WIN32
-	/* See if we should use QueryLimited */
-	rc = GetVersion();
-	if ((rc & 0xff) > 5)
-		env->me_pidquery = MDB_PROCESS_QUERY_LIMITED_INFORMATION;
-	else
-		env->me_pidquery = PROCESS_QUERY_INFORMATION;
-#endif /* _WIN32 */
-
-#ifdef BROKEN_FDATASYNC
-	/* ext3/ext4 fdatasync is broken on some older Linux kernels.
-	 * https://lkml.org/lkml/2012/9/3/83
-	 * Kernels after 3.6-rc6 are known good.
-	 * https://lkml.org/lkml/2012/9/10/556
-	 * See if the DB is on ext3/ext4, then check for new enough kernel
-	 * Kernels 2.6.32.60, 2.6.34.15, 3.2.30, and 3.5.4 are also known
-	 * to be patched.
-	 */
-	{
-		struct statfs st;
-		fstatfs(env->me_fd, &st);
-		while (st.f_type == 0xEF53) {
-			struct utsname uts;
-			int i;
-			uname(&uts);
-			if (uts.release[0] < '3') {
-				if (!strncmp(uts.release, "2.6.32.", 7)) {
-					i = atoi(uts.release+7);
-					if (i >= 60)
-						break;	/* 2.6.32.60 and newer is OK */
-				} else if (!strncmp(uts.release, "2.6.34.", 7)) {
-					i = atoi(uts.release+7);
-					if (i >= 15)
-						break;	/* 2.6.34.15 and newer is OK */
-				}
-			} else if (uts.release[0] == '3') {
-				i = atoi(uts.release+2);
-				if (i > 5)
-					break;	/* 3.6 and newer is OK */
-				if (i == 5) {
-					i = atoi(uts.release+4);
-					if (i >= 4)
-						break;	/* 3.5.4 and newer is OK */
-				} else if (i == 2) {
-					i = atoi(uts.release+4);
-					if (i >= 30)
-						break;	/* 3.2.30 and newer is OK */
-				}
-			} else {	/* 4.x and newer is OK */
-				break;
-			}
-			env->me_flags |= MDB_FSYNCONLY;
-			break;
-		}
-	}
-#endif
-
-	if ((i = mdb_env_read_header(env, &meta)) != 0) {
-		if (i != ENOENT)
-			return i;
-		DPUTS("new mdbenv");
-		newenv = 1;
-		env->me_psize = env->me_os_psize;
-		if (env->me_psize > MAX_PAGESIZE)
-			env->me_psize = MAX_PAGESIZE;
-		memset(&meta, 0, sizeof(meta));
-		mdb_env_init_meta0(env, &meta);
-		meta.mm_mapsize = DEFAULT_MAPSIZE;
-	} else {
-		env->me_psize = meta.mm_psize;
-	}
-
-	/* Was a mapsize configured? */
-	if (!env->me_mapsize) {
-		env->me_mapsize = meta.mm_mapsize;
-	}
-	{
-		/* Make sure mapsize >= committed data size.  Even when using
-		 * mm_mapsize, which could be broken in old files (ITS#7789).
-		 */
-		size_t minsize = (meta.mm_last_pg + 1) * meta.mm_psize;
-		if (env->me_mapsize < minsize)
-			env->me_mapsize = minsize;
-	}
-	meta.mm_mapsize = env->me_mapsize;
-
-	if (newenv && !(flags & MDB_FIXEDMAP)) {
-		/* mdb_env_map() may grow the datafile.  Write the metapages
-		 * first, so the file will be valid if initialization fails.
-		 * Except with FIXEDMAP, since we do not yet know mm_address.
-		 * We could fill in mm_address later, but then a different
-		 * program might end up doing that - one with a memory layout
-		 * and map address which does not suit the main program.
-		 */
-		rc = mdb_env_init_meta(env, &meta);
-		if (rc)
-			return rc;
-		newenv = 0;
-	}
-
-	rc = mdb_env_map(env, (flags & MDB_FIXEDMAP) ? meta.mm_address : NULL);
-	if (rc)
-		return rc;
-
-	if (newenv) {
-		if (flags & MDB_FIXEDMAP)
-			meta.mm_address = env->me_map;
-		i = mdb_env_init_meta(env, &meta);
-		if (i != MDB_SUCCESS) {
-			return i;
-		}
-	}
-
-	env->me_maxfree_1pg = (env->me_psize - PAGEHDRSZ) / sizeof(pgno_t) - 1;
-	env->me_nodemax = (((env->me_psize - PAGEHDRSZ) / MDB_MINKEYS) & -2)
-		- sizeof(indx_t);
-#if !(MDB_MAXKEYSIZE)
-	env->me_maxkey = env->me_nodemax - (NODESIZE + sizeof(MDB_db));
-#endif
-	env->me_maxpg = env->me_mapsize / env->me_psize;
-
-#if MDB_DEBUG
-	{
-		MDB_meta *meta = mdb_env_pick_meta(env);
-		MDB_db *db = &meta->mm_dbs[MAIN_DBI];
-
-		DPRINTF(("opened database version %u, pagesize %u",
-			meta->mm_version, env->me_psize));
-		DPRINTF(("using meta page %d",    (int) (meta->mm_txnid & 1)));
-		DPRINTF(("depth: %u",             db->md_depth));
-		DPRINTF(("entries: %"Z"u",        db->md_entries));
-		DPRINTF(("branch pages: %"Z"u",   db->md_branch_pages));
-		DPRINTF(("leaf pages: %"Z"u",     db->md_leaf_pages));
-		DPRINTF(("overflow pages: %"Z"u", db->md_overflow_pages));
-		DPRINTF(("root: %"Z"u",           db->md_root));
-	}
-#endif
-
-	return MDB_SUCCESS;
-}
-
-
-/** Release a reader thread's slot in the reader lock table.
- *	This function is called automatically when a thread exits.
- * @param[in] ptr This points to the slot in the reader lock table.
- */
-static void
-mdb_env_reader_dest(void *ptr)
-{
-	MDB_reader *reader = ptr;
-
-#ifndef _WIN32
-	if (reader->mr_pid == getpid()) /* catch pthread_exit() in child process */
-#endif
-		/* We omit the mutex, so do this atomically (i.e. skip mr_txnid) */
-		reader->mr_pid = 0;
-}
-
-#ifdef _WIN32
-/** Junk for arranging thread-specific callbacks on Windows. This is
- *	necessarily platform and compiler-specific. Windows supports up
- *	to 1088 keys. Let's assume nobody opens more than 64 environments
- *	in a single process, for now. They can override this if needed.
- */
-#ifndef MAX_TLS_KEYS
-#define MAX_TLS_KEYS	64
-#endif
-static pthread_key_t mdb_tls_keys[MAX_TLS_KEYS];
-static int mdb_tls_nkeys;
-
-static void NTAPI mdb_tls_callback(PVOID module, DWORD reason, PVOID ptr)
-{
-	int i;
-	switch(reason) {
-	case DLL_PROCESS_ATTACH: break;
-	case DLL_THREAD_ATTACH: break;
-	case DLL_THREAD_DETACH:
-		for (i=0; i<mdb_tls_nkeys; i++) {
-			MDB_reader *r = pthread_getspecific(mdb_tls_keys[i]);
-			if (r) {
-				mdb_env_reader_dest(r);
-			}
-		}
-		break;
-	case DLL_PROCESS_DETACH: break;
-	}
-}
-#ifdef __GNUC__
-#ifdef _WIN64
-const PIMAGE_TLS_CALLBACK mdb_tls_cbp __attribute__((section (".CRT$XLB"))) = mdb_tls_callback;
-#else
-PIMAGE_TLS_CALLBACK mdb_tls_cbp __attribute__((section (".CRT$XLB"))) = mdb_tls_callback;
-#endif
-#else
-#ifdef _WIN64
-/* Force some symbol references.
- *	_tls_used forces the linker to create the TLS directory if not already done
- *	mdb_tls_cbp prevents whole-program-optimizer from dropping the symbol.
- */
-#pragma comment(linker, "/INCLUDE:_tls_used")
-#pragma comment(linker, "/INCLUDE:mdb_tls_cbp")
-#pragma const_seg(".CRT$XLB")
-extern const PIMAGE_TLS_CALLBACK mdb_tls_cbp;
-const PIMAGE_TLS_CALLBACK mdb_tls_cbp = mdb_tls_callback;
-#pragma const_seg()
-#else	/* _WIN32 */
-#pragma comment(linker, "/INCLUDE:__tls_used")
-#pragma comment(linker, "/INCLUDE:_mdb_tls_cbp")
-#pragma data_seg(".CRT$XLB")
-PIMAGE_TLS_CALLBACK mdb_tls_cbp = mdb_tls_callback;
-#pragma data_seg()
-#endif	/* WIN 32/64 */
-#endif	/* !__GNUC__ */
-#endif
-
-/** Downgrade the exclusive lock on the region back to shared */
-static int ESECT
-mdb_env_share_locks(MDB_env *env, int *excl)
-{
-	int rc = 0;
-	MDB_meta *meta = mdb_env_pick_meta(env);
-
-	env->me_txns->mti_txnid = meta->mm_txnid;
-
-#ifdef _WIN32
-	{
-		OVERLAPPED ov;
-		/* First acquire a shared lock. The Unlock will
-		 * then release the existing exclusive lock.
-		 */
-		memset(&ov, 0, sizeof(ov));
-		if (!LockFileEx(env->me_lfd, 0, 0, 1, 0, &ov)) {
-			rc = ErrCode();
-		} else {
-			UnlockFile(env->me_lfd, 0, 0, 1, 0);
-			*excl = 0;
-		}
-	}
-#else
-	{
-		struct flock lock_info;
-		/* The shared lock replaces the existing lock */
-		memset((void *)&lock_info, 0, sizeof(lock_info));
-		lock_info.l_type = F_RDLCK;
-		lock_info.l_whence = SEEK_SET;
-		lock_info.l_start = 0;
-		lock_info.l_len = 1;
-		while ((rc = fcntl(env->me_lfd, F_SETLK, &lock_info)) &&
-				(rc = ErrCode()) == EINTR) ;
-		*excl = rc ? -1 : 0;	/* error may mean we lost the lock */
-	}
-#endif
-
-	return rc;
-}
-
-/** Try to get exclusive lock, otherwise shared.
- *	Maintain *excl = -1: no/unknown lock, 0: shared, 1: exclusive.
- */
-static int ESECT
-mdb_env_excl_lock(MDB_env *env, int *excl)
-{
-	int rc = 0;
-#ifdef _WIN32
-	if (LockFile(env->me_lfd, 0, 0, 1, 0)) {
-		*excl = 1;
-	} else {
-		OVERLAPPED ov;
-		memset(&ov, 0, sizeof(ov));
-		if (LockFileEx(env->me_lfd, 0, 0, 1, 0, &ov)) {
-			*excl = 0;
-		} else {
-			rc = ErrCode();
-		}
-	}
-#else
-	struct flock lock_info;
-	memset((void *)&lock_info, 0, sizeof(lock_info));
-	lock_info.l_type = F_WRLCK;
-	lock_info.l_whence = SEEK_SET;
-	lock_info.l_start = 0;
-	lock_info.l_len = 1;
-	while ((rc = fcntl(env->me_lfd, F_SETLK, &lock_info)) &&
-			(rc = ErrCode()) == EINTR) ;
-	if (!rc) {
-		*excl = 1;
-	} else
-# ifndef MDB_USE_POSIX_MUTEX
-	if (*excl < 0) /* always true when MDB_USE_POSIX_MUTEX */
-# endif
-	{
-		lock_info.l_type = F_RDLCK;
-		while ((rc = fcntl(env->me_lfd, F_SETLKW, &lock_info)) &&
-				(rc = ErrCode()) == EINTR) ;
-		if (rc == 0)
-			*excl = 0;
-	}
-#endif
-	return rc;
-}
-
-#ifdef MDB_USE_HASH
-/*
- * hash_64 - 64 bit Fowler/Noll/Vo-0 FNV-1a hash code
- *
- * @(#) $Revision: 5.1 $
- * @(#) $Id: hash_64a.c,v 5.1 2009/06/30 09:01:38 chongo Exp $
- * @(#) $Source: /usr/local/src/cmd/fnv/RCS/hash_64a.c,v $
- *
- *	  http://www.isthe.com/chongo/tech/comp/fnv/index.html
- *
- ***
- *
- * Please do not copyright this code.  This code is in the public domain.
- *
- * LANDON CURT NOLL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
- * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO
- * EVENT SHALL LANDON CURT NOLL BE LIABLE FOR ANY SPECIAL, INDIRECT OR
- * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
- * USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
- * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- * PERFORMANCE OF THIS SOFTWARE.
- *
- * By:
- *	chongo <Landon Curt Noll> /\oo/\
- *	  http://www.isthe.com/chongo/
- *
- * Share and Enjoy!	:-)
- */
-
-typedef unsigned long long	mdb_hash_t;
-#define MDB_HASH_INIT ((mdb_hash_t)0xcbf29ce484222325ULL)
-
-/** perform a 64 bit Fowler/Noll/Vo FNV-1a hash on a buffer
- * @param[in] val	value to hash
- * @param[in] hval	initial value for hash
- * @return 64 bit hash
- *
- * NOTE: To use the recommended 64 bit FNV-1a hash, use MDB_HASH_INIT as the
- * 	 hval arg on the first call.
- */
-static mdb_hash_t
-mdb_hash_val(MDB_val *val, mdb_hash_t hval)
-{
-	unsigned char *s = (unsigned char *)val->mv_data;	/* unsigned string */
-	unsigned char *end = s + val->mv_size;
-	/*
-	 * FNV-1a hash each octet of the string
-	 */
-	while (s < end) {
-		/* xor the bottom with the current octet */
-		hval ^= (mdb_hash_t)*s++;
-
-		/* multiply by the 64 bit FNV magic prime mod 2^64 */
-		hval += (hval << 1) + (hval << 4) + (hval << 5) +
-			(hval << 7) + (hval << 8) + (hval << 40);
-	}
-	/* return our new hash value */
-	return hval;
-}
-
-/** Hash the string and output the encoded hash.
- * This uses modified RFC1924 Ascii85 encoding to accommodate systems with
- * very short name limits. We don't care about the encoding being reversible,
- * we just want to preserve as many bits of the input as possible in a
- * small printable string.
- * @param[in] str string to hash
- * @param[out] encbuf an array of 11 chars to hold the hash
- */
-static const char mdb_a85[]= "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz!#$%&()*+-;<=>?@^_`{|}~";
-
-static void ESECT
-mdb_pack85(unsigned long l, char *out)
-{
-	int i;
-
-	for (i=0; i<5; i++) {
-		*out++ = mdb_a85[l % 85];
-		l /= 85;
-	}
-}
-
-static void ESECT
-mdb_hash_enc(MDB_val *val, char *encbuf)
-{
-	mdb_hash_t h = mdb_hash_val(val, MDB_HASH_INIT);
-
-	mdb_pack85(h, encbuf);
-	mdb_pack85(h>>32, encbuf+5);
-	encbuf[10] = '\0';
-}
-#endif
-
-/** Open and/or initialize the lock region for the environment.
- * @param[in] env The LMDB environment.
- * @param[in] fname Filename + scratch area, from #mdb_fname_init().
- * @param[in] mode The Unix permissions for the file, if we create it.
- * @param[in,out] excl In -1, out lock type: -1 none, 0 shared, 1 exclusive
- * @return 0 on success, non-zero on failure.
- */
-static int ESECT
-mdb_env_setup_locks(MDB_env *env, MDB_name *fname, int mode, int *excl)
-{
-#ifdef _WIN32
-#	define MDB_ERRCODE_ROFS	ERROR_WRITE_PROTECT
-#else
-#	define MDB_ERRCODE_ROFS	EROFS
-#endif
-	int rc;
-	off_t size, rsize;
-
-	rc = mdb_fopen(env, fname, MDB_O_LOCKS, mode, &env->me_lfd);
-	if (rc) {
-		/* Omit lockfile if read-only env on read-only filesystem */
-		if (rc == MDB_ERRCODE_ROFS && (env->me_flags & MDB_RDONLY)) {
-			return MDB_SUCCESS;
-		}
-		goto fail;
-	}
-
-	if (!(env->me_flags & MDB_NOTLS)) {
-		rc = pthread_key_create(&env->me_txkey, mdb_env_reader_dest);
-		if (rc)
-			goto fail;
-		env->me_flags |= MDB_ENV_TXKEY;
-#ifdef _WIN32
-		/* Windows TLS callbacks need help finding their TLS info. */
-		if (mdb_tls_nkeys >= MAX_TLS_KEYS) {
-			rc = MDB_TLS_FULL;
-			goto fail;
-		}
-		mdb_tls_keys[mdb_tls_nkeys++] = env->me_txkey;
-#endif
-	}
-
-	/* Try to get exclusive lock. If we succeed, then
-	 * nobody is using the lock region and we should initialize it.
-	 */
-	if ((rc = mdb_env_excl_lock(env, excl))) goto fail;
-
-#ifdef _WIN32
-	size = GetFileSize(env->me_lfd, NULL);
-#else
-	size = lseek(env->me_lfd, 0, SEEK_END);
-	if (size == -1) goto fail_errno;
-#endif
-	rsize = (env->me_maxreaders-1) * sizeof(MDB_reader) + sizeof(MDB_txninfo);
-	if (size < rsize && *excl > 0) {
-#ifdef _WIN32
-		if (SetFilePointer(env->me_lfd, rsize, NULL, FILE_BEGIN) != (DWORD)rsize
-			|| !SetEndOfFile(env->me_lfd))
-			goto fail_errno;
-#else
-		if (ftruncate(env->me_lfd, rsize) != 0) goto fail_errno;
-#endif
-	} else {
-		rsize = size;
-		size = rsize - sizeof(MDB_txninfo);
-		env->me_maxreaders = size/sizeof(MDB_reader) + 1;
-	}
-	{
-#ifdef _WIN32
-		HANDLE mh;
-		mh = CreateFileMapping(env->me_lfd, NULL, PAGE_READWRITE,
-			0, 0, NULL);
-		if (!mh) goto fail_errno;
-		env->me_txns = MapViewOfFileEx(mh, FILE_MAP_WRITE, 0, 0, rsize, NULL);
-		CloseHandle(mh);
-		if (!env->me_txns) goto fail_errno;
-#else
-		void *m = mmap(NULL, rsize, PROT_READ|PROT_WRITE, MAP_SHARED,
-			env->me_lfd, 0);
-		if (m == MAP_FAILED) goto fail_errno;
-		env->me_txns = m;
-#endif
-	}
-	if (*excl > 0) {
-#ifdef _WIN32
-		BY_HANDLE_FILE_INFORMATION stbuf;
-		struct {
-			DWORD volume;
-			DWORD nhigh;
-			DWORD nlow;
-		} idbuf;
-		MDB_val val;
-		char encbuf[11];
-
-		if (!mdb_sec_inited) {
-			InitializeSecurityDescriptor(&mdb_null_sd,
-				SECURITY_DESCRIPTOR_REVISION);
-			SetSecurityDescriptorDacl(&mdb_null_sd, TRUE, 0, FALSE);
-			mdb_all_sa.nLength = sizeof(SECURITY_ATTRIBUTES);
-			mdb_all_sa.bInheritHandle = FALSE;
-			mdb_all_sa.lpSecurityDescriptor = &mdb_null_sd;
-			mdb_sec_inited = 1;
-		}
-		if (!GetFileInformationByHandle(env->me_lfd, &stbuf)) goto fail_errno;
-		idbuf.volume = stbuf.dwVolumeSerialNumber;
-		idbuf.nhigh  = stbuf.nFileIndexHigh;
-		idbuf.nlow   = stbuf.nFileIndexLow;
-		val.mv_data = &idbuf;
-		val.mv_size = sizeof(idbuf);
-		mdb_hash_enc(&val, encbuf);
-		sprintf(env->me_txns->mti_rmname, "Global\\MDBr%s", encbuf);
-		sprintf(env->me_txns->mti_wmname, "Global\\MDBw%s", encbuf);
-		env->me_rmutex = CreateMutexA(&mdb_all_sa, FALSE, env->me_txns->mti_rmname);
-		if (!env->me_rmutex) goto fail_errno;
-		env->me_wmutex = CreateMutexA(&mdb_all_sa, FALSE, env->me_txns->mti_wmname);
-		if (!env->me_wmutex) goto fail_errno;
-#elif defined(MDB_USE_POSIX_SEM)
-		struct stat stbuf;
-		struct {
-			dev_t dev;
-			ino_t ino;
-		} idbuf;
-		MDB_val val;
-		char encbuf[11];
-
-#if defined(__NetBSD__)
-#define	MDB_SHORT_SEMNAMES	1	/* limited to 14 chars */
-#endif
-		if (fstat(env->me_lfd, &stbuf)) goto fail_errno;
-		idbuf.dev = stbuf.st_dev;
-		idbuf.ino = stbuf.st_ino;
-		val.mv_data = &idbuf;
-		val.mv_size = sizeof(idbuf);
-		mdb_hash_enc(&val, encbuf);
-#ifdef MDB_SHORT_SEMNAMES
-		encbuf[9] = '\0';	/* drop name from 15 chars to 14 chars */
-#endif
-		sprintf(env->me_txns->mti_rmname, "/MDBr%s", encbuf);
-		sprintf(env->me_txns->mti_wmname, "/MDBw%s", encbuf);
-		/* Clean up after a previous run, if needed:  Try to
-		 * remove both semaphores before doing anything else.
-		 */
-		sem_unlink(env->me_txns->mti_rmname);
-		sem_unlink(env->me_txns->mti_wmname);
-		env->me_rmutex = sem_open(env->me_txns->mti_rmname,
-			O_CREAT|O_EXCL, mode, 1);
-		if (env->me_rmutex == SEM_FAILED) goto fail_errno;
-		env->me_wmutex = sem_open(env->me_txns->mti_wmname,
-			O_CREAT|O_EXCL, mode, 1);
-		if (env->me_wmutex == SEM_FAILED) goto fail_errno;
-#else	/* MDB_USE_POSIX_MUTEX: */
-		pthread_mutexattr_t mattr;
-
-		/* Solaris needs this before initing a robust mutex.  Otherwise
-		 * it may skip the init and return EBUSY "seems someone already
-		 * inited" or EINVAL "it was inited differently".
-		 */
-		memset(env->me_txns->mti_rmutex, 0, sizeof(*env->me_txns->mti_rmutex));
-		memset(env->me_txns->mti_wmutex, 0, sizeof(*env->me_txns->mti_wmutex));
-
-		if ((rc = pthread_mutexattr_init(&mattr)))
-			goto fail;
-
-		rc = pthread_mutexattr_setpshared(&mattr, PTHREAD_PROCESS_SHARED);
-#ifdef MDB_ROBUST_SUPPORTED
-		if (!rc) rc = pthread_mutexattr_setrobust(&mattr, PTHREAD_MUTEX_ROBUST);
-#endif
-		if (!rc) rc = pthread_mutex_init(env->me_txns->mti_rmutex, &mattr);
-		if (!rc) rc = pthread_mutex_init(env->me_txns->mti_wmutex, &mattr);
-		pthread_mutexattr_destroy(&mattr);
-		if (rc)
-			goto fail;
-#endif	/* _WIN32 || MDB_USE_POSIX_SEM */
-
-		env->me_txns->mti_magic = MDB_MAGIC;
-		env->me_txns->mti_format = MDB_LOCK_FORMAT;
-		env->me_txns->mti_txnid = 0;
-		env->me_txns->mti_numreaders = 0;
-
-	} else {
-		if (env->me_txns->mti_magic != MDB_MAGIC) {
-			DPUTS("lock region has invalid magic");
-			rc = MDB_INVALID;
-			goto fail;
-		}
-		if (env->me_txns->mti_format != MDB_LOCK_FORMAT) {
-			DPRINTF(("lock region has format+version 0x%x, expected 0x%x",
-				env->me_txns->mti_format, MDB_LOCK_FORMAT));
-			rc = MDB_VERSION_MISMATCH;
-			goto fail;
-		}
-		rc = ErrCode();
-		if (rc && rc != EACCES && rc != EAGAIN) {
-			goto fail;
-		}
-#ifdef _WIN32
-		env->me_rmutex = OpenMutexA(SYNCHRONIZE, FALSE, env->me_txns->mti_rmname);
-		if (!env->me_rmutex) goto fail_errno;
-		env->me_wmutex = OpenMutexA(SYNCHRONIZE, FALSE, env->me_txns->mti_wmname);
-		if (!env->me_wmutex) goto fail_errno;
-#elif defined(MDB_USE_POSIX_SEM)
-		env->me_rmutex = sem_open(env->me_txns->mti_rmname, 0);
-		if (env->me_rmutex == SEM_FAILED) goto fail_errno;
-		env->me_wmutex = sem_open(env->me_txns->mti_wmname, 0);
-		if (env->me_wmutex == SEM_FAILED) goto fail_errno;
-#endif
-	}
-	return MDB_SUCCESS;
-
-fail_errno:
-	rc = ErrCode();
-fail:
-	return rc;
-}
-
-	/** Only a subset of the @ref mdb_env flags can be changed
-	 *	at runtime. Changing other flags requires closing the
-	 *	environment and re-opening it with the new flags.
-	 */
-#define	CHANGEABLE	(MDB_NOSYNC|MDB_NOMETASYNC|MDB_MAPASYNC|MDB_NOMEMINIT)
-#define	CHANGELESS	(MDB_FIXEDMAP|MDB_NOSUBDIR|MDB_RDONLY| \
-	MDB_WRITEMAP|MDB_NOTLS|MDB_NOLOCK|MDB_NORDAHEAD)
-
-#if VALID_FLAGS & PERSISTENT_FLAGS & (CHANGEABLE|CHANGELESS)
-# error "Persistent DB flags & env flags overlap, but both go in mm_flags"
-#endif
-
-int ESECT
-mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mdb_mode_t mode)
-{
-	int rc, excl = -1;
-	MDB_name fname;
-
-	if (env->me_fd!=INVALID_HANDLE_VALUE || (flags & ~(CHANGEABLE|CHANGELESS)))
-		return EINVAL;
-
-	flags |= env->me_flags;
-
-	rc = mdb_fname_init(path, flags, &fname);
-	if (rc)
-		return rc;
-
-	if (flags & MDB_RDONLY) {
-		/* silently ignore WRITEMAP when we're only getting read access */
-		flags &= ~MDB_WRITEMAP;
-	} else {
-		if (!((env->me_free_pgs = mdb_midl_alloc(MDB_IDL_UM_MAX)) &&
-			  (env->me_dirty_list = calloc(MDB_IDL_UM_SIZE, sizeof(MDB_ID2)))))
-			rc = ENOMEM;
-	}
-	env->me_flags = flags |= MDB_ENV_ACTIVE;
-	if (rc)
-		goto leave;
-
-	env->me_path = strdup(path);
-	env->me_dbxs = calloc(env->me_maxdbs, sizeof(MDB_dbx));
-	env->me_dbflags = calloc(env->me_maxdbs, sizeof(uint16_t));
-	env->me_dbiseqs = calloc(env->me_maxdbs, sizeof(unsigned int));
-	if (!(env->me_dbxs && env->me_path && env->me_dbflags && env->me_dbiseqs)) {
-		rc = ENOMEM;
-		goto leave;
-	}
-	env->me_dbxs[FREE_DBI].md_cmp = mdb_cmp_long; /* aligned MDB_INTEGERKEY */
-
-	/* For RDONLY, get lockfile after we know datafile exists */
-	if (!(flags & (MDB_RDONLY|MDB_NOLOCK))) {
-		rc = mdb_env_setup_locks(env, &fname, mode, &excl);
-		if (rc)
-			goto leave;
-	}
-
-	rc = mdb_fopen(env, &fname,
-		(flags & MDB_RDONLY) ? MDB_O_RDONLY : MDB_O_RDWR,
-		mode, &env->me_fd);
-	if (rc)
-		goto leave;
-
-	if ((flags & (MDB_RDONLY|MDB_NOLOCK)) == MDB_RDONLY) {
-		rc = mdb_env_setup_locks(env, &fname, mode, &excl);
-		if (rc)
-			goto leave;
-	}
-
-	if ((rc = mdb_env_open2(env)) == MDB_SUCCESS) {
-		if (!(flags & (MDB_RDONLY|MDB_WRITEMAP))) {
-			/* Synchronous fd for meta writes. Needed even with
-			 * MDB_NOSYNC/MDB_NOMETASYNC, in case these get reset.
-			 */
-			rc = mdb_fopen(env, &fname, MDB_O_META, mode, &env->me_mfd);
-			if (rc)
-				goto leave;
-		}
-		DPRINTF(("opened dbenv %p", (void *) env));
-		if (excl > 0) {
-			rc = mdb_env_share_locks(env, &excl);
-			if (rc)
-				goto leave;
-		}
-		if (!(flags & MDB_RDONLY)) {
-			MDB_txn *txn;
-			int tsize = sizeof(MDB_txn), size = tsize + env->me_maxdbs *
-				(sizeof(MDB_db)+sizeof(MDB_cursor *)+sizeof(unsigned int)+1);
-			if ((env->me_pbuf = calloc(1, env->me_psize)) &&
-				(txn = calloc(1, size)))
-			{
-				txn->mt_dbs = (MDB_db *)((char *)txn + tsize);
-				txn->mt_cursors = (MDB_cursor **)(txn->mt_dbs + env->me_maxdbs);
-				txn->mt_dbiseqs = (unsigned int *)(txn->mt_cursors + env->me_maxdbs);
-				txn->mt_dbflags = (unsigned char *)(txn->mt_dbiseqs + env->me_maxdbs);
-				txn->mt_env = env;
-				txn->mt_dbxs = env->me_dbxs;
-				txn->mt_flags = MDB_TXN_FINISHED;
-				env->me_txn0 = txn;
-			} else {
-				rc = ENOMEM;
-			}
-		}
-	}
-
-leave:
-	if (rc) {
-		mdb_env_close0(env, excl);
-	}
-	mdb_fname_destroy(fname);
-	return rc;
-}
-
-/** Destroy resources from mdb_env_open(), clear our readers & DBIs */
-static void ESECT
-mdb_env_close0(MDB_env *env, int excl)
-{
-	int i;
-
-	if (!(env->me_flags & MDB_ENV_ACTIVE))
-		return;
-
-	/* Doing this here since me_dbxs may not exist during mdb_env_close */
-	if (env->me_dbxs) {
-		for (i = env->me_maxdbs; --i >= CORE_DBS; )
-			free(env->me_dbxs[i].md_name.mv_data);
-		free(env->me_dbxs);
-	}
-
-	free(env->me_pbuf);
-	free(env->me_dbiseqs);
-	free(env->me_dbflags);
-	free(env->me_path);
-	free(env->me_dirty_list);
-	free(env->me_txn0);
-	mdb_midl_free(env->me_free_pgs);
-
-	if (env->me_flags & MDB_ENV_TXKEY) {
-		pthread_key_delete(env->me_txkey);
-#ifdef _WIN32
-		/* Delete our key from the global list */
-		for (i=0; i<mdb_tls_nkeys; i++)
-			if (mdb_tls_keys[i] == env->me_txkey) {
-				mdb_tls_keys[i] = mdb_tls_keys[mdb_tls_nkeys-1];
-				mdb_tls_nkeys--;
-				break;
-			}
-#endif
-	}
-
-	if (env->me_map) {
-		munmap(env->me_map, env->me_mapsize);
-	}
-	if (env->me_mfd != INVALID_HANDLE_VALUE)
-		(void) close(env->me_mfd);
-	if (env->me_fd != INVALID_HANDLE_VALUE)
-		(void) close(env->me_fd);
-	if (env->me_txns) {
-		MDB_PID_T pid = env->me_pid;
-		/* Clearing readers is done in this function because
-		 * me_txkey with its destructor must be disabled first.
-		 *
-		 * We skip the the reader mutex, so we touch only
-		 * data owned by this process (me_close_readers and
-		 * our readers), and clear each reader atomically.
-		 */
-		for (i = env->me_close_readers; --i >= 0; )
-			if (env->me_txns->mti_readers[i].mr_pid == pid)
-				env->me_txns->mti_readers[i].mr_pid = 0;
-#ifdef _WIN32
-		if (env->me_rmutex) {
-			CloseHandle(env->me_rmutex);
-			if (env->me_wmutex) CloseHandle(env->me_wmutex);
-		}
-		/* Windows automatically destroys the mutexes when
-		 * the last handle closes.
-		 */
-#elif defined(MDB_USE_POSIX_SEM)
-		if (env->me_rmutex != SEM_FAILED) {
-			sem_close(env->me_rmutex);
-			if (env->me_wmutex != SEM_FAILED)
-				sem_close(env->me_wmutex);
-			/* If we have the filelock:  If we are the
-			 * only remaining user, clean up semaphores.
-			 */
-			if (excl == 0)
-				mdb_env_excl_lock(env, &excl);
-			if (excl > 0) {
-				sem_unlink(env->me_txns->mti_rmname);
-				sem_unlink(env->me_txns->mti_wmname);
-			}
-		}
-#endif
-		munmap((void *)env->me_txns, (env->me_maxreaders-1)*sizeof(MDB_reader)+sizeof(MDB_txninfo));
-	}
-	if (env->me_lfd != INVALID_HANDLE_VALUE) {
-#ifdef _WIN32
-		if (excl >= 0) {
-			/* Unlock the lockfile.  Windows would have unlocked it
-			 * after closing anyway, but not necessarily at once.
-			 */
-			UnlockFile(env->me_lfd, 0, 0, 1, 0);
-		}
-#endif
-		(void) close(env->me_lfd);
-	}
-
-	env->me_flags &= ~(MDB_ENV_ACTIVE|MDB_ENV_TXKEY);
-}
-
-void ESECT
-mdb_env_close(MDB_env *env)
-{
-	MDB_page *dp;
-
-	if (env == NULL)
-		return;
-
-	VGMEMP_DESTROY(env);
-	while ((dp = env->me_dpages) != NULL) {
-		VGMEMP_DEFINED(&dp->mp_next, sizeof(dp->mp_next));
-		env->me_dpages = dp->mp_next;
-		free(dp);
-	}
-
-	mdb_env_close0(env, 0);
-	free(env);
-}
-
-/** Compare two items pointing at aligned size_t's */
-static int
-mdb_cmp_long(const MDB_val *a, const MDB_val *b)
-{
-	return (*(size_t *)a->mv_data < *(size_t *)b->mv_data) ? -1 :
-		*(size_t *)a->mv_data > *(size_t *)b->mv_data;
-}
-
-/** Compare two items pointing at aligned unsigned int's.
- *
- *	This is also set as #MDB_INTEGERDUP|#MDB_DUPFIXED's #MDB_dbx.%md_dcmp,
- *	but #mdb_cmp_clong() is called instead if the data type is size_t.
- */
-static int
-mdb_cmp_int(const MDB_val *a, const MDB_val *b)
-{
-	return (*(unsigned int *)a->mv_data < *(unsigned int *)b->mv_data) ? -1 :
-		*(unsigned int *)a->mv_data > *(unsigned int *)b->mv_data;
-}
-
-/** Compare two items pointing at unsigned ints of unknown alignment.
- *	Nodes and keys are guaranteed to be 2-byte aligned.
- */
-static int
-mdb_cmp_cint(const MDB_val *a, const MDB_val *b)
-{
-#if BYTE_ORDER == LITTLE_ENDIAN
-	unsigned short *u, *c;
-	int x;
-
-	u = (unsigned short *) ((char *) a->mv_data + a->mv_size);
-	c = (unsigned short *) ((char *) b->mv_data + a->mv_size);
-	do {
-		x = *--u - *--c;
-	} while(!x && u > (unsigned short *)a->mv_data);
-	return x;
-#else
-	unsigned short *u, *c, *end;
-	int x;
-
-	end = (unsigned short *) ((char *) a->mv_data + a->mv_size);
-	u = (unsigned short *)a->mv_data;
-	c = (unsigned short *)b->mv_data;
-	do {
-		x = *u++ - *c++;
-	} while(!x && u < end);
-	return x;
-#endif
-}
-
-/** Compare two items lexically */
-static int
-mdb_cmp_memn(const MDB_val *a, const MDB_val *b)
-{
-	int diff;
-	ssize_t len_diff;
-	unsigned int len;
-
-	len = a->mv_size;
-	len_diff = (ssize_t) a->mv_size - (ssize_t) b->mv_size;
-	if (len_diff > 0) {
-		len = b->mv_size;
-		len_diff = 1;
-	}
-
-	diff = memcmp(a->mv_data, b->mv_data, len);
-	return diff ? diff : len_diff<0 ? -1 : len_diff;
-}
-
-/** Compare two items in reverse byte order */
-static int
-mdb_cmp_memnr(const MDB_val *a, const MDB_val *b)
-{
-	const unsigned char	*p1, *p2, *p1_lim;
-	ssize_t len_diff;
-	int diff;
-
-	p1_lim = (const unsigned char *)a->mv_data;
-	p1 = (const unsigned char *)a->mv_data + a->mv_size;
-	p2 = (const unsigned char *)b->mv_data + b->mv_size;
-
-	len_diff = (ssize_t) a->mv_size - (ssize_t) b->mv_size;
-	if (len_diff > 0) {
-		p1_lim += len_diff;
-		len_diff = 1;
-	}
-
-	while (p1 > p1_lim) {
-		diff = *--p1 - *--p2;
-		if (diff)
-			return diff;
-	}
-	return len_diff<0 ? -1 : len_diff;
-}
-
-/** Search for key within a page, using binary search.
- * Returns the smallest entry larger or equal to the key.
- * If exactp is non-null, stores whether the found entry was an exact match
- * in *exactp (1 or 0).
- * Updates the cursor index with the index of the found entry.
- * If no entry larger or equal to the key is found, returns NULL.
- */
-static MDB_node *
-mdb_node_search(MDB_cursor *mc, MDB_val *key, int *exactp)
-{
-	unsigned int	 i = 0, nkeys;
-	int		 low, high;
-	int		 rc = 0;
-	MDB_page *mp = mc->mc_pg[mc->mc_top];
-	MDB_node	*node = NULL;
-	MDB_val	 nodekey;
-	MDB_cmp_func *cmp;
-	DKBUF;
-
-	nkeys = NUMKEYS(mp);
-
-	DPRINTF(("searching %u keys in %s %spage %"Z"u",
-	    nkeys, IS_LEAF(mp) ? "leaf" : "branch", IS_SUBP(mp) ? "sub-" : "",
-	    mdb_dbg_pgno(mp)));
-
-	low = IS_LEAF(mp) ? 0 : 1;
-	high = nkeys - 1;
-	cmp = mc->mc_dbx->md_cmp;
-
-	/* Branch pages have no data, so if using integer keys,
-	 * alignment is guaranteed. Use faster mdb_cmp_int.
-	 */
-	if (cmp == mdb_cmp_cint && IS_BRANCH(mp)) {
-		if (NODEPTR(mp, 1)->mn_ksize == sizeof(size_t))
-			cmp = mdb_cmp_long;
-		else
-			cmp = mdb_cmp_int;
-	}
-
-	if (IS_LEAF2(mp)) {
-		nodekey.mv_size = mc->mc_db->md_pad;
-		node = NODEPTR(mp, 0);	/* fake */
-		while (low <= high) {
-			i = (low + high) >> 1;
-			nodekey.mv_data = LEAF2KEY(mp, i, nodekey.mv_size);
-			rc = cmp(key, &nodekey);
-			DPRINTF(("found leaf index %u [%s], rc = %i",
-			    i, DKEY(&nodekey), rc));
-			if (rc == 0)
-				break;
-			if (rc > 0)
-				low = i + 1;
-			else
-				high = i - 1;
-		}
-	} else {
-		while (low <= high) {
-			i = (low + high) >> 1;
-
-			node = NODEPTR(mp, i);
-			nodekey.mv_size = NODEKSZ(node);
-			nodekey.mv_data = NODEKEY(node);
-
-			rc = cmp(key, &nodekey);
-#if MDB_DEBUG
-			if (IS_LEAF(mp))
-				DPRINTF(("found leaf index %u [%s], rc = %i",
-				    i, DKEY(&nodekey), rc));
-			else
-				DPRINTF(("found branch index %u [%s -> %"Z"u], rc = %i",
-				    i, DKEY(&nodekey), NODEPGNO(node), rc));
-#endif
-			if (rc == 0)
-				break;
-			if (rc > 0)
-				low = i + 1;
-			else
-				high = i - 1;
-		}
-	}
-
-	if (rc > 0) {	/* Found entry is less than the key. */
-		i++;	/* Skip to get the smallest entry larger than key. */
-		if (!IS_LEAF2(mp))
-			node = NODEPTR(mp, i);
-	}
-	if (exactp)
-		*exactp = (rc == 0 && nkeys > 0);
-	/* store the key index */
-	mc->mc_ki[mc->mc_top] = i;
-	if (i >= nkeys)
-		/* There is no entry larger or equal to the key. */
-		return NULL;
-
-	/* nodeptr is fake for LEAF2 */
-	return node;
-}
-
-#if 0
-static void
-mdb_cursor_adjust(MDB_cursor *mc, func)
-{
-	MDB_cursor *m2;
-
-	for (m2 = mc->mc_txn->mt_cursors[mc->mc_dbi]; m2; m2=m2->mc_next) {
-		if (m2->mc_pg[m2->mc_top] == mc->mc_pg[mc->mc_top]) {
-			func(mc, m2);
-		}
-	}
-}
-#endif
-
-/** Pop a page off the top of the cursor's stack. */
-static void
-mdb_cursor_pop(MDB_cursor *mc)
-{
-	if (mc->mc_snum) {
-		DPRINTF(("popping page %"Z"u off db %d cursor %p",
-			mc->mc_pg[mc->mc_top]->mp_pgno, DDBI(mc), (void *) mc));
-
-		mc->mc_snum--;
-		if (mc->mc_snum) {
-			mc->mc_top--;
-		} else {
-			mc->mc_flags &= ~C_INITIALIZED;
-		}
-	}
-}
-
-/** Push a page onto the top of the cursor's stack.
- * Set #MDB_TXN_ERROR on failure.
- */
-static int
-mdb_cursor_push(MDB_cursor *mc, MDB_page *mp)
-{
-	DPRINTF(("pushing page %"Z"u on db %d cursor %p", mp->mp_pgno,
-		DDBI(mc), (void *) mc));
-
-	if (mc->mc_snum >= CURSOR_STACK) {
-		mc->mc_txn->mt_flags |= MDB_TXN_ERROR;
-		return MDB_CURSOR_FULL;
-	}
-
-	mc->mc_top = mc->mc_snum++;
-	mc->mc_pg[mc->mc_top] = mp;
-	mc->mc_ki[mc->mc_top] = 0;
-
-	return MDB_SUCCESS;
-}
-
-/** Find the address of the page corresponding to a given page number.
- * Set #MDB_TXN_ERROR on failure.
- * @param[in] mc the cursor accessing the page.
- * @param[in] pgno the page number for the page to retrieve.
- * @param[out] ret address of a pointer where the page's address will be stored.
- * @param[out] lvl dirty_list inheritance level of found page. 1=current txn, 0=mapped page.
- * @return 0 on success, non-zero on failure.
- */
-static int
-mdb_page_get(MDB_cursor *mc, pgno_t pgno, MDB_page **ret, int *lvl)
-{
-	MDB_txn *txn = mc->mc_txn;
-	MDB_env *env = txn->mt_env;
-	MDB_page *p = NULL;
-	int level;
-
-	if (! (txn->mt_flags & (MDB_TXN_RDONLY|MDB_TXN_WRITEMAP))) {
-		MDB_txn *tx2 = txn;
-		level = 1;
-		do {
-			MDB_ID2L dl = tx2->mt_u.dirty_list;
-			unsigned x;
-			/* Spilled pages were dirtied in this txn and flushed
-			 * because the dirty list got full. Bring this page
-			 * back in from the map (but don't unspill it here,
-			 * leave that unless page_touch happens again).
-			 */
-			if (tx2->mt_spill_pgs) {
-				MDB_ID pn = pgno << 1;
-				x = mdb_midl_search(tx2->mt_spill_pgs, pn);
-				if (x <= tx2->mt_spill_pgs[0] && tx2->mt_spill_pgs[x] == pn) {
-					p = (MDB_page *)(env->me_map + env->me_psize * pgno);
-					goto done;
-				}
-			}
-			if (dl[0].mid) {
-				unsigned x = mdb_mid2l_search(dl, pgno);
-				if (x <= dl[0].mid && dl[x].mid == pgno) {
-					p = dl[x].mptr;
-					goto done;
-				}
-			}
-			level++;
-		} while ((tx2 = tx2->mt_parent) != NULL);
-	}
-
-	if (pgno < txn->mt_next_pgno) {
-		level = 0;
-		p = (MDB_page *)(env->me_map + env->me_psize * pgno);
-	} else {
-		DPRINTF(("page %"Z"u not found", pgno));
-		txn->mt_flags |= MDB_TXN_ERROR;
-		return MDB_PAGE_NOTFOUND;
-	}
-
-done:
-	*ret = p;
-	if (lvl)
-		*lvl = level;
-	return MDB_SUCCESS;
-}
-
-/** Finish #mdb_page_search() / #mdb_page_search_lowest().
- *	The cursor is at the root page, set up the rest of it.
- */
-static int
-mdb_page_search_root(MDB_cursor *mc, MDB_val *key, int flags)
-{
-	MDB_page	*mp = mc->mc_pg[mc->mc_top];
-	int rc;
-	DKBUF;
-
-	while (IS_BRANCH(mp)) {
-		MDB_node	*node;
-		indx_t		i;
-
-		DPRINTF(("branch page %"Z"u has %u keys", mp->mp_pgno, NUMKEYS(mp)));
-		/* Don't assert on branch pages in the FreeDB. We can get here
-		 * while in the process of rebalancing a FreeDB branch page; we must
-		 * let that proceed. ITS#8336
-		 */
-		mdb_cassert(mc, !mc->mc_dbi || NUMKEYS(mp) > 1);
-		DPRINTF(("found index 0 to page %"Z"u", NODEPGNO(NODEPTR(mp, 0))));
-
-		if (flags & (MDB_PS_FIRST|MDB_PS_LAST)) {
-			i = 0;
-			if (flags & MDB_PS_LAST) {
-				i = NUMKEYS(mp) - 1;
-				/* if already init'd, see if we're already in right place */
-				if (mc->mc_flags & C_INITIALIZED) {
-					if (mc->mc_ki[mc->mc_top] == i) {
-						mc->mc_top = mc->mc_snum++;
-						mp = mc->mc_pg[mc->mc_top];
-						goto ready;
-					}
-				}
-			}
-		} else {
-			int	 exact;
-			node = mdb_node_search(mc, key, &exact);
-			if (node == NULL)
-				i = NUMKEYS(mp) - 1;
-			else {
-				i = mc->mc_ki[mc->mc_top];
-				if (!exact) {
-					mdb_cassert(mc, i > 0);
-					i--;
-				}
-			}
-			DPRINTF(("following index %u for key [%s]", i, DKEY(key)));
-		}
-
-		mdb_cassert(mc, i < NUMKEYS(mp));
-		node = NODEPTR(mp, i);
-
-		if ((rc = mdb_page_get(mc, NODEPGNO(node), &mp, NULL)) != 0)
-			return rc;
-
-		mc->mc_ki[mc->mc_top] = i;
-		if ((rc = mdb_cursor_push(mc, mp)))
-			return rc;
-
-ready:
-		if (flags & MDB_PS_MODIFY) {
-			if ((rc = mdb_page_touch(mc)) != 0)
-				return rc;
-			mp = mc->mc_pg[mc->mc_top];
-		}
-	}
-
-	if (!IS_LEAF(mp)) {
-		DPRINTF(("internal error, index points to a %02X page!?",
-		    mp->mp_flags));
-		mc->mc_txn->mt_flags |= MDB_TXN_ERROR;
-		return MDB_CORRUPTED;
-	}
-
-	DPRINTF(("found leaf page %"Z"u for key [%s]", mp->mp_pgno,
-	    key ? DKEY(key) : "null"));
-	mc->mc_flags |= C_INITIALIZED;
-	mc->mc_flags &= ~C_EOF;
-
-	return MDB_SUCCESS;
-}
-
-/** Search for the lowest key under the current branch page.
- * This just bypasses a NUMKEYS check in the current page
- * before calling mdb_page_search_root(), because the callers
- * are all in situations where the current page is known to
- * be underfilled.
- */
-static int
-mdb_page_search_lowest(MDB_cursor *mc)
-{
-	MDB_page	*mp = mc->mc_pg[mc->mc_top];
-	MDB_node	*node = NODEPTR(mp, 0);
-	int rc;
-
-	if ((rc = mdb_page_get(mc, NODEPGNO(node), &mp, NULL)) != 0)
-		return rc;
-
-	mc->mc_ki[mc->mc_top] = 0;
-	if ((rc = mdb_cursor_push(mc, mp)))
-		return rc;
-	return mdb_page_search_root(mc, NULL, MDB_PS_FIRST);
-}
-
-/** Search for the page a given key should be in.
- * Push it and its parent pages on the cursor stack.
- * @param[in,out] mc the cursor for this operation.
- * @param[in] key the key to search for, or NULL for first/last page.
- * @param[in] flags If MDB_PS_MODIFY is set, visited pages in the DB
- *   are touched (updated with new page numbers).
- *   If MDB_PS_FIRST or MDB_PS_LAST is set, find first or last leaf.
- *   This is used by #mdb_cursor_first() and #mdb_cursor_last().
- *   If MDB_PS_ROOTONLY set, just fetch root node, no further lookups.
- * @return 0 on success, non-zero on failure.
- */
-static int
-mdb_page_search(MDB_cursor *mc, MDB_val *key, int flags)
-{
-	int		 rc;
-	pgno_t		 root;
-
-	/* Make sure the txn is still viable, then find the root from
-	 * the txn's db table and set it as the root of the cursor's stack.
-	 */
-	if (mc->mc_txn->mt_flags & MDB_TXN_BLOCKED) {
-		DPUTS("transaction may not be used now");
-		return MDB_BAD_TXN;
-	} else {
-		/* Make sure we're using an up-to-date root */
-		if (*mc->mc_dbflag & DB_STALE) {
-				MDB_cursor mc2;
-				if (TXN_DBI_CHANGED(mc->mc_txn, mc->mc_dbi))
-					return MDB_BAD_DBI;
-				mdb_cursor_init(&mc2, mc->mc_txn, MAIN_DBI, NULL);
-				rc = mdb_page_search(&mc2, &mc->mc_dbx->md_name, 0);
-				if (rc)
-					return rc;
-				{
-					MDB_val data;
-					int exact = 0;
-					uint16_t flags;
-					MDB_node *leaf = mdb_node_search(&mc2,
-						&mc->mc_dbx->md_name, &exact);
-					if (!exact)
-						return MDB_NOTFOUND;
-					if ((leaf->mn_flags & (F_DUPDATA|F_SUBDATA)) != F_SUBDATA)
-						return MDB_INCOMPATIBLE; /* not a named DB */
-					rc = mdb_node_read(&mc2, leaf, &data);
-					if (rc)
-						return rc;
-					memcpy(&flags, ((char *) data.mv_data + offsetof(MDB_db, md_flags)),
-						sizeof(uint16_t));
-					/* The txn may not know this DBI, or another process may
-					 * have dropped and recreated the DB with other flags.
-					 */
-					if ((mc->mc_db->md_flags & PERSISTENT_FLAGS) != flags)
-						return MDB_INCOMPATIBLE;
-					memcpy(mc->mc_db, data.mv_data, sizeof(MDB_db));
-				}
-				*mc->mc_dbflag &= ~DB_STALE;
-		}
-		root = mc->mc_db->md_root;
-
-		if (root == P_INVALID) {		/* Tree is empty. */
-			DPUTS("tree is empty");
-			return MDB_NOTFOUND;
-		}
-	}
-
-	mdb_cassert(mc, root > 1);
-	if (!mc->mc_pg[0] || mc->mc_pg[0]->mp_pgno != root)
-		if ((rc = mdb_page_get(mc, root, &mc->mc_pg[0], NULL)) != 0)
-			return rc;
-
-	mc->mc_snum = 1;
-	mc->mc_top = 0;
-
-	DPRINTF(("db %d root page %"Z"u has flags 0x%X",
-		DDBI(mc), root, mc->mc_pg[0]->mp_flags));
-
-	if (flags & MDB_PS_MODIFY) {
-		if ((rc = mdb_page_touch(mc)))
-			return rc;
-	}
-
-	if (flags & MDB_PS_ROOTONLY)
-		return MDB_SUCCESS;
-
-	return mdb_page_search_root(mc, key, flags);
-}
-
-static int
-mdb_ovpage_free(MDB_cursor *mc, MDB_page *mp)
-{
-	MDB_txn *txn = mc->mc_txn;
-	pgno_t pg = mp->mp_pgno;
-	unsigned x = 0, ovpages = mp->mp_pages;
-	MDB_env *env = txn->mt_env;
-	MDB_IDL sl = txn->mt_spill_pgs;
-	MDB_ID pn = pg << 1;
-	int rc;
-
-	DPRINTF(("free ov page %"Z"u (%d)", pg, ovpages));
-	/* If the page is dirty or on the spill list we just acquired it,
-	 * so we should give it back to our current free list, if any.
-	 * Otherwise put it onto the list of pages we freed in this txn.
-	 *
-	 * Won't create me_pghead: me_pglast must be inited along with it.
-	 * Unsupported in nested txns: They would need to hide the page
-	 * range in ancestor txns' dirty and spilled lists.
-	 */
-	if (env->me_pghead &&
-		!txn->mt_parent &&
-		((mp->mp_flags & P_DIRTY) ||
-		 (sl && (x = mdb_midl_search(sl, pn)) <= sl[0] && sl[x] == pn)))
-	{
-		unsigned i, j;
-		pgno_t *mop;
-		MDB_ID2 *dl, ix, iy;
-		rc = mdb_midl_need(&env->me_pghead, ovpages);
-		if (rc)
-			return rc;
-		if (!(mp->mp_flags & P_DIRTY)) {
-			/* This page is no longer spilled */
-			if (x == sl[0])
-				sl[0]--;
-			else
-				sl[x] |= 1;
-			goto release;
-		}
-		/* Remove from dirty list */
-		dl = txn->mt_u.dirty_list;
-		x = dl[0].mid--;
-		for (ix = dl[x]; ix.mptr != mp; ix = iy) {
-			if (x > 1) {
-				x--;
-				iy = dl[x];
-				dl[x] = ix;
-			} else {
-				mdb_cassert(mc, x > 1);
-				j = ++(dl[0].mid);
-				dl[j] = ix;		/* Unsorted. OK when MDB_TXN_ERROR. */
-				txn->mt_flags |= MDB_TXN_ERROR;
-				return MDB_CORRUPTED;
-			}
-		}
-		txn->mt_dirty_room++;
-		if (!(env->me_flags & MDB_WRITEMAP))
-			mdb_dpage_free(env, mp);
-release:
-		/* Insert in me_pghead */
-		mop = env->me_pghead;
-		j = mop[0] + ovpages;
-		for (i = mop[0]; i && mop[i] < pg; i--)
-			mop[j--] = mop[i];
-		while (j>i)
-			mop[j--] = pg++;
-		mop[0] += ovpages;
-	} else {
-		rc = mdb_midl_append_range(&txn->mt_free_pgs, pg, ovpages);
-		if (rc)
-			return rc;
-	}
-	mc->mc_db->md_overflow_pages -= ovpages;
-	return 0;
-}
-
-/** Return the data associated with a given node.
- * @param[in] mc The cursor for this operation.
- * @param[in] leaf The node being read.
- * @param[out] data Updated to point to the node's data.
- * @return 0 on success, non-zero on failure.
- */
-static int
-mdb_node_read(MDB_cursor *mc, MDB_node *leaf, MDB_val *data)
-{
-	MDB_page	*omp;		/* overflow page */
-	pgno_t		 pgno;
-	int rc;
-
-	if (!F_ISSET(leaf->mn_flags, F_BIGDATA)) {
-		data->mv_size = NODEDSZ(leaf);
-		data->mv_data = NODEDATA(leaf);
-		return MDB_SUCCESS;
-	}
-
-	/* Read overflow data.
-	 */
-	data->mv_size = NODEDSZ(leaf);
-	memcpy(&pgno, NODEDATA(leaf), sizeof(pgno));
-	if ((rc = mdb_page_get(mc, pgno, &omp, NULL)) != 0) {
-		DPRINTF(("read overflow page %"Z"u failed", pgno));
-		return rc;
-	}
-	data->mv_data = METADATA(omp);
-
-	return MDB_SUCCESS;
-}
-
-int
-mdb_get(MDB_txn *txn, MDB_dbi dbi,
-    MDB_val *key, MDB_val *data)
-{
-	MDB_cursor	mc;
-	MDB_xcursor	mx;
-	int exact = 0;
-	DKBUF;
-
-	DPRINTF(("===> get db %u key [%s]", dbi, DKEY(key)));
-
-	if (!key || !data || !TXN_DBI_EXIST(txn, dbi, DB_USRVALID))
-		return EINVAL;
-
-	if (txn->mt_flags & MDB_TXN_BLOCKED)
-		return MDB_BAD_TXN;
-
-	mdb_cursor_init(&mc, txn, dbi, &mx);
-	return mdb_cursor_set(&mc, key, data, MDB_SET, &exact);
-}
-
-/** Find a sibling for a page.
- * Replaces the page at the top of the cursor's stack with the
- * specified sibling, if one exists.
- * @param[in] mc The cursor for this operation.
- * @param[in] move_right Non-zero if the right sibling is requested,
- * otherwise the left sibling.
- * @return 0 on success, non-zero on failure.
- */
-static int
-mdb_cursor_sibling(MDB_cursor *mc, int move_right)
-{
-	int		 rc;
-	MDB_node	*indx;
-	MDB_page	*mp;
-
-	if (mc->mc_snum < 2) {
-		return MDB_NOTFOUND;		/* root has no siblings */
-	}
-
-	mdb_cursor_pop(mc);
-	DPRINTF(("parent page is page %"Z"u, index %u",
-		mc->mc_pg[mc->mc_top]->mp_pgno, mc->mc_ki[mc->mc_top]));
-
-	if (move_right ? (mc->mc_ki[mc->mc_top] + 1u >= NUMKEYS(mc->mc_pg[mc->mc_top]))
-		       : (mc->mc_ki[mc->mc_top] == 0)) {
-		DPRINTF(("no more keys left, moving to %s sibling",
-		    move_right ? "right" : "left"));
-		if ((rc = mdb_cursor_sibling(mc, move_right)) != MDB_SUCCESS) {
-			/* undo cursor_pop before returning */
-			mc->mc_top++;
-			mc->mc_snum++;
-			return rc;
-		}
-	} else {
-		if (move_right)
-			mc->mc_ki[mc->mc_top]++;
-		else
-			mc->mc_ki[mc->mc_top]--;
-		DPRINTF(("just moving to %s index key %u",
-		    move_right ? "right" : "left", mc->mc_ki[mc->mc_top]));
-	}
-	mdb_cassert(mc, IS_BRANCH(mc->mc_pg[mc->mc_top]));
-
-	indx = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]);
-	if ((rc = mdb_page_get(mc, NODEPGNO(indx), &mp, NULL)) != 0) {
-		/* mc will be inconsistent if caller does mc_snum++ as above */
-		mc->mc_flags &= ~(C_INITIALIZED|C_EOF);
-		return rc;
-	}
-
-	mdb_cursor_push(mc, mp);
-	if (!move_right)
-		mc->mc_ki[mc->mc_top] = NUMKEYS(mp)-1;
-
-	return MDB_SUCCESS;
-}
-
-/** Move the cursor to the next data item. */
-static int
-mdb_cursor_next(MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op)
-{
-	MDB_page	*mp;
-	MDB_node	*leaf;
-	int rc;
-
-	if ((mc->mc_flags & C_DEL && op == MDB_NEXT_DUP))
-		return MDB_NOTFOUND;
-
-	if (!(mc->mc_flags & C_INITIALIZED))
-		return mdb_cursor_first(mc, key, data);
-
-	mp = mc->mc_pg[mc->mc_top];
-
-	if (mc->mc_flags & C_EOF) {
-		if (mc->mc_ki[mc->mc_top] >= NUMKEYS(mp)-1)
-			return MDB_NOTFOUND;
-		mc->mc_flags ^= C_EOF;
-	}
-
-	if (mc->mc_db->md_flags & MDB_DUPSORT) {
-		leaf = NODEPTR(mp, mc->mc_ki[mc->mc_top]);
-		if (F_ISSET(leaf->mn_flags, F_DUPDATA)) {
-			if (op == MDB_NEXT || op == MDB_NEXT_DUP) {
-				rc = mdb_cursor_next(&mc->mc_xcursor->mx_cursor, data, NULL, MDB_NEXT);
-				if (op != MDB_NEXT || rc != MDB_NOTFOUND) {
-					if (rc == MDB_SUCCESS)
-						MDB_GET_KEY(leaf, key);
-					return rc;
-				}
-			}
-		} else {
-			mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED|C_EOF);
-			if (op == MDB_NEXT_DUP)
-				return MDB_NOTFOUND;
-		}
-	}
-
-	DPRINTF(("cursor_next: top page is %"Z"u in cursor %p",
-		mdb_dbg_pgno(mp), (void *) mc));
-	if (mc->mc_flags & C_DEL) {
-		mc->mc_flags ^= C_DEL;
-		goto skip;
-	}
-
-	if (mc->mc_ki[mc->mc_top] + 1u >= NUMKEYS(mp)) {
-		DPUTS("=====> move to next sibling page");
-		if ((rc = mdb_cursor_sibling(mc, 1)) != MDB_SUCCESS) {
-			mc->mc_flags |= C_EOF;
-			return rc;
-		}
-		mp = mc->mc_pg[mc->mc_top];
-		DPRINTF(("next page is %"Z"u, key index %u", mp->mp_pgno, mc->mc_ki[mc->mc_top]));
-	} else
-		mc->mc_ki[mc->mc_top]++;
-
-skip:
-	DPRINTF(("==> cursor points to page %"Z"u with %u keys, key index %u",
-	    mdb_dbg_pgno(mp), NUMKEYS(mp), mc->mc_ki[mc->mc_top]));
-
-	if (IS_LEAF2(mp)) {
-		key->mv_size = mc->mc_db->md_pad;
-		key->mv_data = LEAF2KEY(mp, mc->mc_ki[mc->mc_top], key->mv_size);
-		return MDB_SUCCESS;
-	}
-
-	mdb_cassert(mc, IS_LEAF(mp));
-	leaf = NODEPTR(mp, mc->mc_ki[mc->mc_top]);
-
-	if (F_ISSET(leaf->mn_flags, F_DUPDATA)) {
-		mdb_xcursor_init1(mc, leaf);
-	}
-	if (data) {
-		if ((rc = mdb_node_read(mc, leaf, data)) != MDB_SUCCESS)
-			return rc;
-
-		if (F_ISSET(leaf->mn_flags, F_DUPDATA)) {
-			rc = mdb_cursor_first(&mc->mc_xcursor->mx_cursor, data, NULL);
-			if (rc != MDB_SUCCESS)
-				return rc;
-		}
-	}
-
-	MDB_GET_KEY(leaf, key);
-	return MDB_SUCCESS;
-}
-
-/** Move the cursor to the previous data item. */
-static int
-mdb_cursor_prev(MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op)
-{
-	MDB_page	*mp;
-	MDB_node	*leaf;
-	int rc;
-
-	if (!(mc->mc_flags & C_INITIALIZED)) {
-		rc = mdb_cursor_last(mc, key, data);
-		if (rc)
-			return rc;
-		mc->mc_ki[mc->mc_top]++;
-	}
-
-	mp = mc->mc_pg[mc->mc_top];
-
-	if (mc->mc_db->md_flags & MDB_DUPSORT) {
-		leaf = NODEPTR(mp, mc->mc_ki[mc->mc_top]);
-		if (F_ISSET(leaf->mn_flags, F_DUPDATA)) {
-			if (op == MDB_PREV || op == MDB_PREV_DUP) {
-				rc = mdb_cursor_prev(&mc->mc_xcursor->mx_cursor, data, NULL, MDB_PREV);
-				if (op != MDB_PREV || rc != MDB_NOTFOUND) {
-					if (rc == MDB_SUCCESS) {
-						MDB_GET_KEY(leaf, key);
-						mc->mc_flags &= ~C_EOF;
-					}
-					return rc;
-				}
-			}
-		} else {
-			mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED|C_EOF);
-			if (op == MDB_PREV_DUP)
-				return MDB_NOTFOUND;
-		}
-	}
-
-	DPRINTF(("cursor_prev: top page is %"Z"u in cursor %p",
-		mdb_dbg_pgno(mp), (void *) mc));
-
-	mc->mc_flags &= ~(C_EOF|C_DEL);
-
-	if (mc->mc_ki[mc->mc_top] == 0)  {
-		DPUTS("=====> move to prev sibling page");
-		if ((rc = mdb_cursor_sibling(mc, 0)) != MDB_SUCCESS) {
-			return rc;
-		}
-		mp = mc->mc_pg[mc->mc_top];
-		mc->mc_ki[mc->mc_top] = NUMKEYS(mp) - 1;
-		DPRINTF(("prev page is %"Z"u, key index %u", mp->mp_pgno, mc->mc_ki[mc->mc_top]));
-	} else
-		mc->mc_ki[mc->mc_top]--;
-
-	DPRINTF(("==> cursor points to page %"Z"u with %u keys, key index %u",
-	    mdb_dbg_pgno(mp), NUMKEYS(mp), mc->mc_ki[mc->mc_top]));
-
-	if (IS_LEAF2(mp)) {
-		key->mv_size = mc->mc_db->md_pad;
-		key->mv_data = LEAF2KEY(mp, mc->mc_ki[mc->mc_top], key->mv_size);
-		return MDB_SUCCESS;
-	}
-
-	mdb_cassert(mc, IS_LEAF(mp));
-	leaf = NODEPTR(mp, mc->mc_ki[mc->mc_top]);
-
-	if (F_ISSET(leaf->mn_flags, F_DUPDATA)) {
-		mdb_xcursor_init1(mc, leaf);
-	}
-	if (data) {
-		if ((rc = mdb_node_read(mc, leaf, data)) != MDB_SUCCESS)
-			return rc;
-
-		if (F_ISSET(leaf->mn_flags, F_DUPDATA)) {
-			rc = mdb_cursor_last(&mc->mc_xcursor->mx_cursor, data, NULL);
-			if (rc != MDB_SUCCESS)
-				return rc;
-		}
-	}
-
-	MDB_GET_KEY(leaf, key);
-	return MDB_SUCCESS;
-}
-
-/** Set the cursor on a specific data item. */
-static int
-mdb_cursor_set(MDB_cursor *mc, MDB_val *key, MDB_val *data,
-    MDB_cursor_op op, int *exactp)
-{
-	int		 rc;
-	MDB_page	*mp;
-	MDB_node	*leaf = NULL;
-	DKBUF;
-
-	if (key->mv_size == 0)
-		return MDB_BAD_VALSIZE;
-
-	if (mc->mc_xcursor)
-		mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED|C_EOF);
-
-	/* See if we're already on the right page */
-	if (mc->mc_flags & C_INITIALIZED) {
-		MDB_val nodekey;
-
-		mp = mc->mc_pg[mc->mc_top];
-		if (!NUMKEYS(mp)) {
-			mc->mc_ki[mc->mc_top] = 0;
-			return MDB_NOTFOUND;
-		}
-		if (mp->mp_flags & P_LEAF2) {
-			nodekey.mv_size = mc->mc_db->md_pad;
-			nodekey.mv_data = LEAF2KEY(mp, 0, nodekey.mv_size);
-		} else {
-			leaf = NODEPTR(mp, 0);
-			MDB_GET_KEY2(leaf, nodekey);
-		}
-		rc = mc->mc_dbx->md_cmp(key, &nodekey);
-		if (rc == 0) {
-			/* Probably happens rarely, but first node on the page
-			 * was the one we wanted.
-			 */
-			mc->mc_ki[mc->mc_top] = 0;
-			if (exactp)
-				*exactp = 1;
-			goto set1;
-		}
-		if (rc > 0) {
-			unsigned int i;
-			unsigned int nkeys = NUMKEYS(mp);
-			if (nkeys > 1) {
-				if (mp->mp_flags & P_LEAF2) {
-					nodekey.mv_data = LEAF2KEY(mp,
-						 nkeys-1, nodekey.mv_size);
-				} else {
-					leaf = NODEPTR(mp, nkeys-1);
-					MDB_GET_KEY2(leaf, nodekey);
-				}
-				rc = mc->mc_dbx->md_cmp(key, &nodekey);
-				if (rc == 0) {
-					/* last node was the one we wanted */
-					mc->mc_ki[mc->mc_top] = nkeys-1;
-					if (exactp)
-						*exactp = 1;
-					goto set1;
-				}
-				if (rc < 0) {
-					if (mc->mc_ki[mc->mc_top] < NUMKEYS(mp)) {
-						/* This is definitely the right page, skip search_page */
-						if (mp->mp_flags & P_LEAF2) {
-							nodekey.mv_data = LEAF2KEY(mp,
-								 mc->mc_ki[mc->mc_top], nodekey.mv_size);
-						} else {
-							leaf = NODEPTR(mp, mc->mc_ki[mc->mc_top]);
-							MDB_GET_KEY2(leaf, nodekey);
-						}
-						rc = mc->mc_dbx->md_cmp(key, &nodekey);
-						if (rc == 0) {
-							/* current node was the one we wanted */
-							if (exactp)
-								*exactp = 1;
-							goto set1;
-						}
-					}
-					rc = 0;
-					mc->mc_flags &= ~C_EOF;
-					goto set2;
-				}
-			}
-			/* If any parents have right-sibs, search.
-			 * Otherwise, there's nothing further.
-			 */
-			for (i=0; i<mc->mc_top; i++)
-				if (mc->mc_ki[i] <
-					NUMKEYS(mc->mc_pg[i])-1)
-					break;
-			if (i == mc->mc_top) {
-				/* There are no other pages */
-				mc->mc_ki[mc->mc_top] = nkeys;
-				return MDB_NOTFOUND;
-			}
-		}
-		if (!mc->mc_top) {
-			/* There are no other pages */
-			mc->mc_ki[mc->mc_top] = 0;
-			if (op == MDB_SET_RANGE && !exactp) {
-				rc = 0;
-				goto set1;
-			} else
-				return MDB_NOTFOUND;
-		}
-	} else {
-		mc->mc_pg[0] = 0;
-	}
-
-	rc = mdb_page_search(mc, key, 0);
-	if (rc != MDB_SUCCESS)
-		return rc;
-
-	mp = mc->mc_pg[mc->mc_top];
-	mdb_cassert(mc, IS_LEAF(mp));
-
-set2:
-	leaf = mdb_node_search(mc, key, exactp);
-	if (exactp != NULL && !*exactp) {
-		/* MDB_SET specified and not an exact match. */
-		return MDB_NOTFOUND;
-	}
-
-	if (leaf == NULL) {
-		DPUTS("===> inexact leaf not found, goto sibling");
-		if ((rc = mdb_cursor_sibling(mc, 1)) != MDB_SUCCESS) {
-			mc->mc_flags |= C_EOF;
-			return rc;		/* no entries matched */
-		}
-		mp = mc->mc_pg[mc->mc_top];
-		mdb_cassert(mc, IS_LEAF(mp));
-		leaf = NODEPTR(mp, 0);
-	}
-
-set1:
-	mc->mc_flags |= C_INITIALIZED;
-	mc->mc_flags &= ~C_EOF;
-
-	if (IS_LEAF2(mp)) {
-		if (op == MDB_SET_RANGE || op == MDB_SET_KEY) {
-			key->mv_size = mc->mc_db->md_pad;
-			key->mv_data = LEAF2KEY(mp, mc->mc_ki[mc->mc_top], key->mv_size);
-		}
-		return MDB_SUCCESS;
-	}
-
-	if (F_ISSET(leaf->mn_flags, F_DUPDATA)) {
-		mdb_xcursor_init1(mc, leaf);
-	}
-	if (data) {
-		if (F_ISSET(leaf->mn_flags, F_DUPDATA)) {
-			if (op == MDB_SET || op == MDB_SET_KEY || op == MDB_SET_RANGE) {
-				rc = mdb_cursor_first(&mc->mc_xcursor->mx_cursor, data, NULL);
-			} else {
-				int ex2, *ex2p;
-				if (op == MDB_GET_BOTH) {
-					ex2p = &ex2;
-					ex2 = 0;
-				} else {
-					ex2p = NULL;
-				}
-				rc = mdb_cursor_set(&mc->mc_xcursor->mx_cursor, data, NULL, MDB_SET_RANGE, ex2p);
-				if (rc != MDB_SUCCESS)
-					return rc;
-			}
-		} else if (op == MDB_GET_BOTH || op == MDB_GET_BOTH_RANGE) {
-			MDB_val olddata;
-			MDB_cmp_func *dcmp;
-			if ((rc = mdb_node_read(mc, leaf, &olddata)) != MDB_SUCCESS)
-				return rc;
-			dcmp = mc->mc_dbx->md_dcmp;
-#if UINT_MAX < SIZE_MAX
-			if (dcmp == mdb_cmp_int && olddata.mv_size == sizeof(size_t))
-				dcmp = mdb_cmp_clong;
-#endif
-			rc = dcmp(data, &olddata);
-			if (rc) {
-				if (op == MDB_GET_BOTH || rc > 0)
-					return MDB_NOTFOUND;
-				rc = 0;
-			}
-			*data = olddata;
-
-		} else {
-			if (mc->mc_xcursor)
-				mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED|C_EOF);
-			if ((rc = mdb_node_read(mc, leaf, data)) != MDB_SUCCESS)
-				return rc;
-		}
-	}
-
-	/* The key already matches in all other cases */
-	if (op == MDB_SET_RANGE || op == MDB_SET_KEY)
-		MDB_GET_KEY(leaf, key);
-	DPRINTF(("==> cursor placed on key [%s]", DKEY(key)));
-
-	return rc;
-}
-
-/** Move the cursor to the first item in the database. */
-static int
-mdb_cursor_first(MDB_cursor *mc, MDB_val *key, MDB_val *data)
-{
-	int		 rc;
-	MDB_node	*leaf;
-
-	if (mc->mc_xcursor)
-		mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED|C_EOF);
-
-	if (!(mc->mc_flags & C_INITIALIZED) || mc->mc_top) {
-		rc = mdb_page_search(mc, NULL, MDB_PS_FIRST);
-		if (rc != MDB_SUCCESS)
-			return rc;
-	}
-	mdb_cassert(mc, IS_LEAF(mc->mc_pg[mc->mc_top]));
-
-	leaf = NODEPTR(mc->mc_pg[mc->mc_top], 0);
-	mc->mc_flags |= C_INITIALIZED;
-	mc->mc_flags &= ~C_EOF;
-
-	mc->mc_ki[mc->mc_top] = 0;
-
-	if (IS_LEAF2(mc->mc_pg[mc->mc_top])) {
-		key->mv_size = mc->mc_db->md_pad;
-		key->mv_data = LEAF2KEY(mc->mc_pg[mc->mc_top], 0, key->mv_size);
-		return MDB_SUCCESS;
-	}
-
-	if (data) {
-		if (F_ISSET(leaf->mn_flags, F_DUPDATA)) {
-			mdb_xcursor_init1(mc, leaf);
-			rc = mdb_cursor_first(&mc->mc_xcursor->mx_cursor, data, NULL);
-			if (rc)
-				return rc;
-		} else {
-			if ((rc = mdb_node_read(mc, leaf, data)) != MDB_SUCCESS)
-				return rc;
-		}
-	}
-	MDB_GET_KEY(leaf, key);
-	return MDB_SUCCESS;
-}
-
-/** Move the cursor to the last item in the database. */
-static int
-mdb_cursor_last(MDB_cursor *mc, MDB_val *key, MDB_val *data)
-{
-	int		 rc;
-	MDB_node	*leaf;
-
-	if (mc->mc_xcursor)
-		mc->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED|C_EOF);
-
-	if (!(mc->mc_flags & C_INITIALIZED) || mc->mc_top) {
-		rc = mdb_page_search(mc, NULL, MDB_PS_LAST);
-		if (rc != MDB_SUCCESS)
-			return rc;
-	}
-	mdb_cassert(mc, IS_LEAF(mc->mc_pg[mc->mc_top]));
-
-	mc->mc_ki[mc->mc_top] = NUMKEYS(mc->mc_pg[mc->mc_top]) - 1;
-	mc->mc_flags |= C_INITIALIZED|C_EOF;
-	leaf = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]);
-
-	if (IS_LEAF2(mc->mc_pg[mc->mc_top])) {
-		key->mv_size = mc->mc_db->md_pad;
-		key->mv_data = LEAF2KEY(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top], key->mv_size);
-		return MDB_SUCCESS;
-	}
-
-	if (data) {
-		if (F_ISSET(leaf->mn_flags, F_DUPDATA)) {
-			mdb_xcursor_init1(mc, leaf);
-			rc = mdb_cursor_last(&mc->mc_xcursor->mx_cursor, data, NULL);
-			if (rc)
-				return rc;
-		} else {
-			if ((rc = mdb_node_read(mc, leaf, data)) != MDB_SUCCESS)
-				return rc;
-		}
-	}
-
-	MDB_GET_KEY(leaf, key);
-	return MDB_SUCCESS;
-}
-
-int
-mdb_cursor_get(MDB_cursor *mc, MDB_val *key, MDB_val *data,
-    MDB_cursor_op op)
-{
-	int		 rc;
-	int		 exact = 0;
-	int		 (*mfunc)(MDB_cursor *mc, MDB_val *key, MDB_val *data);
-
-	if (mc == NULL)
-		return EINVAL;
-
-	if (mc->mc_txn->mt_flags & MDB_TXN_BLOCKED)
-		return MDB_BAD_TXN;
-
-	switch (op) {
-	case MDB_GET_CURRENT:
-		if (!(mc->mc_flags & C_INITIALIZED)) {
-			rc = EINVAL;
-		} else {
-			MDB_page *mp = mc->mc_pg[mc->mc_top];
-			int nkeys = NUMKEYS(mp);
-			if (!nkeys || mc->mc_ki[mc->mc_top] >= nkeys) {
-				mc->mc_ki[mc->mc_top] = nkeys;
-				rc = MDB_NOTFOUND;
-				break;
-			}
-			rc = MDB_SUCCESS;
-			if (IS_LEAF2(mp)) {
-				key->mv_size = mc->mc_db->md_pad;
-				key->mv_data = LEAF2KEY(mp, mc->mc_ki[mc->mc_top], key->mv_size);
-			} else {
-				MDB_node *leaf = NODEPTR(mp, mc->mc_ki[mc->mc_top]);
-				MDB_GET_KEY(leaf, key);
-				if (data) {
-					if (F_ISSET(leaf->mn_flags, F_DUPDATA)) {
-						rc = mdb_cursor_get(&mc->mc_xcursor->mx_cursor, data, NULL, MDB_GET_CURRENT);
-					} else {
-						rc = mdb_node_read(mc, leaf, data);
-					}
-				}
-			}
-		}
-		break;
-	case MDB_GET_BOTH:
-	case MDB_GET_BOTH_RANGE:
-		if (data == NULL) {
-			rc = EINVAL;
-			break;
-		}
-		if (mc->mc_xcursor == NULL) {
-			rc = MDB_INCOMPATIBLE;
-			break;
-		}
-		/* FALLTHRU */
-	case MDB_SET:
-	case MDB_SET_KEY:
-	case MDB_SET_RANGE:
-		if (key == NULL) {
-			rc = EINVAL;
-		} else {
-			rc = mdb_cursor_set(mc, key, data, op,
-				op == MDB_SET_RANGE ? NULL : &exact);
-		}
-		break;
-	case MDB_GET_MULTIPLE:
-		if (data == NULL || !(mc->mc_flags & C_INITIALIZED)) {
-			rc = EINVAL;
-			break;
-		}
-		if (!(mc->mc_db->md_flags & MDB_DUPFIXED)) {
-			rc = MDB_INCOMPATIBLE;
-			break;
-		}
-		rc = MDB_SUCCESS;
-		if (!(mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) ||
-			(mc->mc_xcursor->mx_cursor.mc_flags & C_EOF))
-			break;
-		goto fetchm;
-	case MDB_NEXT_MULTIPLE:
-		if (data == NULL) {
-			rc = EINVAL;
-			break;
-		}
-		if (!(mc->mc_db->md_flags & MDB_DUPFIXED)) {
-			rc = MDB_INCOMPATIBLE;
-			break;
-		}
-		rc = mdb_cursor_next(mc, key, data, MDB_NEXT_DUP);
-		if (rc == MDB_SUCCESS) {
-			if (mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) {
-				MDB_cursor *mx;
-fetchm:
-				mx = &mc->mc_xcursor->mx_cursor;
-				data->mv_size = NUMKEYS(mx->mc_pg[mx->mc_top]) *
-					mx->mc_db->md_pad;
-				data->mv_data = METADATA(mx->mc_pg[mx->mc_top]);
-				mx->mc_ki[mx->mc_top] = NUMKEYS(mx->mc_pg[mx->mc_top])-1;
-			} else {
-				rc = MDB_NOTFOUND;
-			}
-		}
-		break;
-	case MDB_PREV_MULTIPLE:
-		if (data == NULL) {
-			rc = EINVAL;
-			break;
-		}
-		if (!(mc->mc_db->md_flags & MDB_DUPFIXED)) {
-			rc = MDB_INCOMPATIBLE;
-			break;
-		}
-		if (!(mc->mc_flags & C_INITIALIZED))
-			rc = mdb_cursor_last(mc, key, data);
-		else
-			rc = MDB_SUCCESS;
-		if (rc == MDB_SUCCESS) {
-			MDB_cursor *mx = &mc->mc_xcursor->mx_cursor;
-			if (mx->mc_flags & C_INITIALIZED) {
-				rc = mdb_cursor_sibling(mx, 0);
-				if (rc == MDB_SUCCESS)
-					goto fetchm;
-			} else {
-				rc = MDB_NOTFOUND;
-			}
-		}
-		break;
-	case MDB_NEXT:
-	case MDB_NEXT_DUP:
-	case MDB_NEXT_NODUP:
-		rc = mdb_cursor_next(mc, key, data, op);
-		break;
-	case MDB_PREV:
-	case MDB_PREV_DUP:
-	case MDB_PREV_NODUP:
-		rc = mdb_cursor_prev(mc, key, data, op);
-		break;
-	case MDB_FIRST:
-		rc = mdb_cursor_first(mc, key, data);
-		break;
-	case MDB_FIRST_DUP:
-		mfunc = mdb_cursor_first;
-	mmove:
-		if (data == NULL || !(mc->mc_flags & C_INITIALIZED)) {
-			rc = EINVAL;
-			break;
-		}
-		if (mc->mc_xcursor == NULL) {
-			rc = MDB_INCOMPATIBLE;
-			break;
-		}
-		if (mc->mc_ki[mc->mc_top] >= NUMKEYS(mc->mc_pg[mc->mc_top])) {
-			mc->mc_ki[mc->mc_top] = NUMKEYS(mc->mc_pg[mc->mc_top]);
-			rc = MDB_NOTFOUND;
-			break;
-		}
-		{
-			MDB_node *leaf = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]);
-			if (!F_ISSET(leaf->mn_flags, F_DUPDATA)) {
-				MDB_GET_KEY(leaf, key);
-				rc = mdb_node_read(mc, leaf, data);
-				break;
-			}
-		}
-		if (!(mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED)) {
-			rc = EINVAL;
-			break;
-		}
-		rc = mfunc(&mc->mc_xcursor->mx_cursor, data, NULL);
-		break;
-	case MDB_LAST:
-		rc = mdb_cursor_last(mc, key, data);
-		break;
-	case MDB_LAST_DUP:
-		mfunc = mdb_cursor_last;
-		goto mmove;
-	default:
-		DPRINTF(("unhandled/unimplemented cursor operation %u", op));
-		rc = EINVAL;
-		break;
-	}
-
-	if (mc->mc_flags & C_DEL)
-		mc->mc_flags ^= C_DEL;
-
-	return rc;
-}
-
-/** Touch all the pages in the cursor stack. Set mc_top.
- *	Makes sure all the pages are writable, before attempting a write operation.
- * @param[in] mc The cursor to operate on.
- */
-static int
-mdb_cursor_touch(MDB_cursor *mc)
-{
-	int rc = MDB_SUCCESS;
-
-	if (mc->mc_dbi >= CORE_DBS && !(*mc->mc_dbflag & (DB_DIRTY|DB_DUPDATA))) {
-		/* Touch DB record of named DB */
-		MDB_cursor mc2;
-		MDB_xcursor mcx;
-		if (TXN_DBI_CHANGED(mc->mc_txn, mc->mc_dbi))
-			return MDB_BAD_DBI;
-		mdb_cursor_init(&mc2, mc->mc_txn, MAIN_DBI, &mcx);
-		rc = mdb_page_search(&mc2, &mc->mc_dbx->md_name, MDB_PS_MODIFY);
-		if (rc)
-			 return rc;
-		*mc->mc_dbflag |= DB_DIRTY;
-	}
-	mc->mc_top = 0;
-	if (mc->mc_snum) {
-		do {
-			rc = mdb_page_touch(mc);
-		} while (!rc && ++(mc->mc_top) < mc->mc_snum);
-		mc->mc_top = mc->mc_snum-1;
-	}
-	return rc;
-}
-
-/** Do not spill pages to disk if txn is getting full, may fail instead */
-#define MDB_NOSPILL	0x8000
-
-int
-mdb_cursor_put(MDB_cursor *mc, MDB_val *key, MDB_val *data,
-    unsigned int flags)
-{
-	MDB_env		*env;
-	MDB_node	*leaf = NULL;
-	MDB_page	*fp, *mp, *sub_root = NULL;
-	uint16_t	fp_flags;
-	MDB_val		xdata, *rdata, dkey, olddata;
-	MDB_db dummy;
-	int do_sub = 0, insert_key, insert_data;
-	unsigned int mcount = 0, dcount = 0, nospill;
-	size_t nsize;
-	int rc, rc2;
-	unsigned int nflags;
-	DKBUF;
-
-	if (mc == NULL || key == NULL)
-		return EINVAL;
-
-	env = mc->mc_txn->mt_env;
-
-	/* Check this first so counter will always be zero on any
-	 * early failures.
-	 */
-	if (flags & MDB_MULTIPLE) {
-		dcount = data[1].mv_size;
-		data[1].mv_size = 0;
-		if (!F_ISSET(mc->mc_db->md_flags, MDB_DUPFIXED))
-			return MDB_INCOMPATIBLE;
-	}
-
-	nospill = flags & MDB_NOSPILL;
-	flags &= ~MDB_NOSPILL;
-
-	if (mc->mc_txn->mt_flags & (MDB_TXN_RDONLY|MDB_TXN_BLOCKED))
-		return (mc->mc_txn->mt_flags & MDB_TXN_RDONLY) ? EACCES : MDB_BAD_TXN;
-
-	if (key->mv_size-1 >= ENV_MAXKEY(env))
-		return MDB_BAD_VALSIZE;
-
-#if SIZE_MAX > MAXDATASIZE
-	if (data->mv_size > ((mc->mc_db->md_flags & MDB_DUPSORT) ? ENV_MAXKEY(env) : MAXDATASIZE))
-		return MDB_BAD_VALSIZE;
-#else
-	if ((mc->mc_db->md_flags & MDB_DUPSORT) && data->mv_size > ENV_MAXKEY(env))
-		return MDB_BAD_VALSIZE;
-#endif
-
-	DPRINTF(("==> put db %d key [%s], size %"Z"u, data size %"Z"u",
-		DDBI(mc), DKEY(key), key ? key->mv_size : 0, data->mv_size));
-
-	dkey.mv_size = 0;
-
-	if (flags == MDB_CURRENT) {
-		if (!(mc->mc_flags & C_INITIALIZED))
-			return EINVAL;
-		rc = MDB_SUCCESS;
-	} else if (mc->mc_db->md_root == P_INVALID) {
-		/* new database, cursor has nothing to point to */
-		mc->mc_snum = 0;
-		mc->mc_top = 0;
-		mc->mc_flags &= ~C_INITIALIZED;
-		rc = MDB_NO_ROOT;
-	} else {
-		int exact = 0;
-		MDB_val d2;
-		if (flags & MDB_APPEND) {
-			MDB_val k2;
-			rc = mdb_cursor_last(mc, &k2, &d2);
-			if (rc == 0) {
-				rc = mc->mc_dbx->md_cmp(key, &k2);
-				if (rc > 0) {
-					rc = MDB_NOTFOUND;
-					mc->mc_ki[mc->mc_top]++;
-				} else {
-					/* new key is <= last key */
-					rc = MDB_KEYEXIST;
-				}
-			}
-		} else {
-			rc = mdb_cursor_set(mc, key, &d2, MDB_SET, &exact);
-		}
-		if ((flags & MDB_NOOVERWRITE) && rc == 0) {
-			DPRINTF(("duplicate key [%s]", DKEY(key)));
-			*data = d2;
-			return MDB_KEYEXIST;
-		}
-		if (rc && rc != MDB_NOTFOUND)
-			return rc;
-	}
-
-	if (mc->mc_flags & C_DEL)
-		mc->mc_flags ^= C_DEL;
-
-	/* Cursor is positioned, check for room in the dirty list */
-	if (!nospill) {
-		if (flags & MDB_MULTIPLE) {
-			rdata = &xdata;
-			xdata.mv_size = data->mv_size * dcount;
-		} else {
-			rdata = data;
-		}
-		if ((rc2 = mdb_page_spill(mc, key, rdata)))
-			return rc2;
-	}
-
-	if (rc == MDB_NO_ROOT) {
-		MDB_page *np;
-		/* new database, write a root leaf page */
-		DPUTS("allocating new root leaf page");
-		if ((rc2 = mdb_page_new(mc, P_LEAF, 1, &np))) {
-			return rc2;
-		}
-		mdb_cursor_push(mc, np);
-		mc->mc_db->md_root = np->mp_pgno;
-		mc->mc_db->md_depth++;
-		*mc->mc_dbflag |= DB_DIRTY;
-		if ((mc->mc_db->md_flags & (MDB_DUPSORT|MDB_DUPFIXED))
-			== MDB_DUPFIXED)
-			np->mp_flags |= P_LEAF2;
-		mc->mc_flags |= C_INITIALIZED;
-	} else {
-		/* make sure all cursor pages are writable */
-		rc2 = mdb_cursor_touch(mc);
-		if (rc2)
-			return rc2;
-	}
-
-	insert_key = insert_data = rc;
-	if (insert_key) {
-		/* The key does not exist */
-		DPRINTF(("inserting key at index %i", mc->mc_ki[mc->mc_top]));
-		if ((mc->mc_db->md_flags & MDB_DUPSORT) &&
-			LEAFSIZE(key, data) > env->me_nodemax)
-		{
-			/* Too big for a node, insert in sub-DB.  Set up an empty
-			 * "old sub-page" for prep_subDB to expand to a full page.
-			 */
-			fp_flags = P_LEAF|P_DIRTY;
-			fp = env->me_pbuf;
-			fp->mp_pad = data->mv_size; /* used if MDB_DUPFIXED */
-			fp->mp_lower = fp->mp_upper = (PAGEHDRSZ-PAGEBASE);
-			olddata.mv_size = PAGEHDRSZ;
-			goto prep_subDB;
-		}
-	} else {
-		/* there's only a key anyway, so this is a no-op */
-		if (IS_LEAF2(mc->mc_pg[mc->mc_top])) {
-			char *ptr;
-			unsigned int ksize = mc->mc_db->md_pad;
-			if (key->mv_size != ksize)
-				return MDB_BAD_VALSIZE;
-			ptr = LEAF2KEY(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top], ksize);
-			memcpy(ptr, key->mv_data, ksize);
-fix_parent:
-			/* if overwriting slot 0 of leaf, need to
-			 * update branch key if there is a parent page
-			 */
-			if (mc->mc_top && !mc->mc_ki[mc->mc_top]) {
-				unsigned short dtop = 1;
-				mc->mc_top--;
-				/* slot 0 is always an empty key, find real slot */
-				while (mc->mc_top && !mc->mc_ki[mc->mc_top]) {
-					mc->mc_top--;
-					dtop++;
-				}
-				if (mc->mc_ki[mc->mc_top])
-					rc2 = mdb_update_key(mc, key);
-				else
-					rc2 = MDB_SUCCESS;
-				mc->mc_top += dtop;
-				if (rc2)
-					return rc2;
-			}
-			return MDB_SUCCESS;
-		}
-
-more:
-		leaf = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]);
-		olddata.mv_size = NODEDSZ(leaf);
-		olddata.mv_data = NODEDATA(leaf);
-
-		/* DB has dups? */
-		if (F_ISSET(mc->mc_db->md_flags, MDB_DUPSORT)) {
-			/* Prepare (sub-)page/sub-DB to accept the new item,
-			 * if needed.  fp: old sub-page or a header faking
-			 * it.  mp: new (sub-)page.  offset: growth in page
-			 * size.  xdata: node data with new page or DB.
-			 */
-			unsigned	i, offset = 0;
-			mp = fp = xdata.mv_data = env->me_pbuf;
-			mp->mp_pgno = mc->mc_pg[mc->mc_top]->mp_pgno;
-
-			/* Was a single item before, must convert now */
-			if (!F_ISSET(leaf->mn_flags, F_DUPDATA)) {
-				MDB_cmp_func *dcmp;
-				/* Just overwrite the current item */
-				if (flags == MDB_CURRENT)
-					goto current;
-				dcmp = mc->mc_dbx->md_dcmp;
-#if UINT_MAX < SIZE_MAX
-				if (dcmp == mdb_cmp_int && olddata.mv_size == sizeof(size_t))
-					dcmp = mdb_cmp_clong;
-#endif
-				/* does data match? */
-				if (!dcmp(data, &olddata)) {
-					if (flags & (MDB_NODUPDATA|MDB_APPENDDUP))
-						return MDB_KEYEXIST;
-					/* overwrite it */
-					goto current;
-				}
-
-				/* Back up original data item */
-				dkey.mv_size = olddata.mv_size;
-				dkey.mv_data = memcpy(fp+1, olddata.mv_data, olddata.mv_size);
-
-				/* Make sub-page header for the dup items, with dummy body */
-				fp->mp_flags = P_LEAF|P_DIRTY|P_SUBP;
-				fp->mp_lower = (PAGEHDRSZ-PAGEBASE);
-				xdata.mv_size = PAGEHDRSZ + dkey.mv_size + data->mv_size;
-				if (mc->mc_db->md_flags & MDB_DUPFIXED) {
-					fp->mp_flags |= P_LEAF2;
-					fp->mp_pad = data->mv_size;
-					xdata.mv_size += 2 * data->mv_size;	/* leave space for 2 more */
-				} else {
-					xdata.mv_size += 2 * (sizeof(indx_t) + NODESIZE) +
-						(dkey.mv_size & 1) + (data->mv_size & 1);
-				}
-				fp->mp_upper = xdata.mv_size - PAGEBASE;
-				olddata.mv_size = xdata.mv_size; /* pretend olddata is fp */
-			} else if (leaf->mn_flags & F_SUBDATA) {
-				/* Data is on sub-DB, just store it */
-				flags |= F_DUPDATA|F_SUBDATA;
-				goto put_sub;
-			} else {
-				/* Data is on sub-page */
-				fp = olddata.mv_data;
-				switch (flags) {
-				default:
-					if (!(mc->mc_db->md_flags & MDB_DUPFIXED)) {
-						offset = EVEN(NODESIZE + sizeof(indx_t) +
-							data->mv_size);
-						break;
-					}
-					offset = fp->mp_pad;
-					if (SIZELEFT(fp) < offset) {
-						offset *= 4; /* space for 4 more */
-						break;
-					}
-					/* FALLTHRU: Big enough MDB_DUPFIXED sub-page */
-				case MDB_CURRENT:
-					fp->mp_flags |= P_DIRTY;
-					COPY_PGNO(fp->mp_pgno, mp->mp_pgno);
-					mc->mc_xcursor->mx_cursor.mc_pg[0] = fp;
-					flags |= F_DUPDATA;
-					goto put_sub;
-				}
-				xdata.mv_size = olddata.mv_size + offset;
-			}
-
-			fp_flags = fp->mp_flags;
-			if (NODESIZE + NODEKSZ(leaf) + xdata.mv_size > env->me_nodemax) {
-					/* Too big for a sub-page, convert to sub-DB */
-					fp_flags &= ~P_SUBP;
-prep_subDB:
-					if (mc->mc_db->md_flags & MDB_DUPFIXED) {
-						fp_flags |= P_LEAF2;
-						dummy.md_pad = fp->mp_pad;
-						dummy.md_flags = MDB_DUPFIXED;
-						if (mc->mc_db->md_flags & MDB_INTEGERDUP)
-							dummy.md_flags |= MDB_INTEGERKEY;
-					} else {
-						dummy.md_pad = 0;
-						dummy.md_flags = 0;
-					}
-					dummy.md_depth = 1;
-					dummy.md_branch_pages = 0;
-					dummy.md_leaf_pages = 1;
-					dummy.md_overflow_pages = 0;
-					dummy.md_entries = NUMKEYS(fp);
-					xdata.mv_size = sizeof(MDB_db);
-					xdata.mv_data = &dummy;
-					if ((rc = mdb_page_alloc(mc, 1, &mp)))
-						return rc;
-					offset = env->me_psize - olddata.mv_size;
-					flags |= F_DUPDATA|F_SUBDATA;
-					dummy.md_root = mp->mp_pgno;
-					sub_root = mp;
-			}
-			if (mp != fp) {
-				mp->mp_flags = fp_flags | P_DIRTY;
-				mp->mp_pad   = fp->mp_pad;
-				mp->mp_lower = fp->mp_lower;
-				mp->mp_upper = fp->mp_upper + offset;
-				if (fp_flags & P_LEAF2) {
-					memcpy(METADATA(mp), METADATA(fp), NUMKEYS(fp) * fp->mp_pad);
-				} else {
-					memcpy((char *)mp + mp->mp_upper + PAGEBASE, (char *)fp + fp->mp_upper + PAGEBASE,
-						olddata.mv_size - fp->mp_upper - PAGEBASE);
-					memcpy((char *)(&mp->mp_ptrs), (char *)(&fp->mp_ptrs), NUMKEYS(fp) * sizeof(mp->mp_ptrs[0]));
-					for (i=0; i<NUMKEYS(fp); i++)
-						mp->mp_ptrs[i] += offset;
-				}
-			}
-
-			rdata = &xdata;
-			flags |= F_DUPDATA;
-			do_sub = 1;
-			if (!insert_key)
-				mdb_node_del(mc, 0);
-			goto new_sub;
-		}
-current:
-		/* LMDB passes F_SUBDATA in 'flags' to write a DB record */
-		if ((leaf->mn_flags ^ flags) & F_SUBDATA)
-			return MDB_INCOMPATIBLE;
-		/* overflow page overwrites need special handling */
-		if (F_ISSET(leaf->mn_flags, F_BIGDATA)) {
-			MDB_page *omp;
-			pgno_t pg;
-			int level, ovpages, dpages = OVPAGES(data->mv_size, env->me_psize);
-
-			memcpy(&pg, olddata.mv_data, sizeof(pg));
-			if ((rc2 = mdb_page_get(mc, pg, &omp, &level)) != 0)
-				return rc2;
-			ovpages = omp->mp_pages;
-
-			/* Is the ov page large enough? */
-			if (ovpages >= dpages) {
-			  if (!(omp->mp_flags & P_DIRTY) &&
-				  (level || (env->me_flags & MDB_WRITEMAP)))
-			  {
-				rc = mdb_page_unspill(mc->mc_txn, omp, &omp);
-				if (rc)
-					return rc;
-				level = 0;		/* dirty in this txn or clean */
-			  }
-			  /* Is it dirty? */
-			  if (omp->mp_flags & P_DIRTY) {
-				/* yes, overwrite it. Note in this case we don't
-				 * bother to try shrinking the page if the new data
-				 * is smaller than the overflow threshold.
-				 */
-				if (level > 1) {
-					/* It is writable only in a parent txn */
-					size_t sz = (size_t) env->me_psize * ovpages, off;
-					MDB_page *np = mdb_page_malloc(mc->mc_txn, ovpages);
-					MDB_ID2 id2;
-					if (!np)
-						return ENOMEM;
-					id2.mid = pg;
-					id2.mptr = np;
-					/* Note - this page is already counted in parent's dirty_room */
-					rc2 = mdb_mid2l_insert(mc->mc_txn->mt_u.dirty_list, &id2);
-					mdb_cassert(mc, rc2 == 0);
-					/* Currently we make the page look as with put() in the
-					 * parent txn, in case the user peeks at MDB_RESERVEd
-					 * or unused parts. Some users treat ovpages specially.
-					 */
-					if (!(flags & MDB_RESERVE)) {
-						/* Skip the part where LMDB will put *data.
-						 * Copy end of page, adjusting alignment so
-						 * compiler may copy words instead of bytes.
-						 */
-						off = (PAGEHDRSZ + data->mv_size) & -sizeof(size_t);
-						memcpy((size_t *)((char *)np + off),
-							(size_t *)((char *)omp + off), sz - off);
-						sz = PAGEHDRSZ;
-					}
-					memcpy(np, omp, sz); /* Copy beginning of page */
-					omp = np;
-				}
-				SETDSZ(leaf, data->mv_size);
-				if (F_ISSET(flags, MDB_RESERVE))
-					data->mv_data = METADATA(omp);
-				else
-					memcpy(METADATA(omp), data->mv_data, data->mv_size);
-				return MDB_SUCCESS;
-			  }
-			}
-			if ((rc2 = mdb_ovpage_free(mc, omp)) != MDB_SUCCESS)
-				return rc2;
-		} else if (data->mv_size == olddata.mv_size) {
-			/* same size, just replace it. Note that we could
-			 * also reuse this node if the new data is smaller,
-			 * but instead we opt to shrink the node in that case.
-			 */
-			if (F_ISSET(flags, MDB_RESERVE))
-				data->mv_data = olddata.mv_data;
-			else if (!(mc->mc_flags & C_SUB))
-				memcpy(olddata.mv_data, data->mv_data, data->mv_size);
-			else {
-				memcpy(NODEKEY(leaf), key->mv_data, key->mv_size);
-				goto fix_parent;
-			}
-			return MDB_SUCCESS;
-		}
-		mdb_node_del(mc, 0);
-	}
-
-	rdata = data;
-
-new_sub:
-	nflags = flags & NODE_ADD_FLAGS;
-	nsize = IS_LEAF2(mc->mc_pg[mc->mc_top]) ? key->mv_size : mdb_leaf_size(env, key, rdata);
-	if (SIZELEFT(mc->mc_pg[mc->mc_top]) < nsize) {
-		if (( flags & (F_DUPDATA|F_SUBDATA)) == F_DUPDATA )
-			nflags &= ~MDB_APPEND; /* sub-page may need room to grow */
-		if (!insert_key)
-			nflags |= MDB_SPLIT_REPLACE;
-		rc = mdb_page_split(mc, key, rdata, P_INVALID, nflags);
-	} else {
-		/* There is room already in this leaf page. */
-		rc = mdb_node_add(mc, mc->mc_ki[mc->mc_top], key, rdata, 0, nflags);
-		if (rc == 0) {
-			/* Adjust other cursors pointing to mp */
-			MDB_cursor *m2, *m3;
-			MDB_dbi dbi = mc->mc_dbi;
-			unsigned i = mc->mc_top;
-			MDB_page *mp = mc->mc_pg[i];
-
-			for (m2 = mc->mc_txn->mt_cursors[dbi]; m2; m2=m2->mc_next) {
-				if (mc->mc_flags & C_SUB)
-					m3 = &m2->mc_xcursor->mx_cursor;
-				else
-					m3 = m2;
-				if (m3 == mc || m3->mc_snum < mc->mc_snum || m3->mc_pg[i] != mp) continue;
-				if (m3->mc_ki[i] >= mc->mc_ki[i] && insert_key) {
-					m3->mc_ki[i]++;
-				}
-				XCURSOR_REFRESH(m3, i, mp);
-			}
-		}
-	}
-
-	if (rc == MDB_SUCCESS) {
-		/* Now store the actual data in the child DB. Note that we're
-		 * storing the user data in the keys field, so there are strict
-		 * size limits on dupdata. The actual data fields of the child
-		 * DB are all zero size.
-		 */
-		if (do_sub) {
-			int xflags, new_dupdata;
-			size_t ecount;
-put_sub:
-			xdata.mv_size = 0;
-			xdata.mv_data = "";
-			leaf = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]);
-			if (flags & MDB_CURRENT) {
-				xflags = MDB_CURRENT|MDB_NOSPILL;
-			} else {
-				mdb_xcursor_init1(mc, leaf);
-				xflags = (flags & MDB_NODUPDATA) ?
-					MDB_NOOVERWRITE|MDB_NOSPILL : MDB_NOSPILL;
-			}
-			if (sub_root)
-				mc->mc_xcursor->mx_cursor.mc_pg[0] = sub_root;
-			new_dupdata = (int)dkey.mv_size;
-			/* converted, write the original data first */
-			if (dkey.mv_size) {
-				rc = mdb_cursor_put(&mc->mc_xcursor->mx_cursor, &dkey, &xdata, xflags);
-				if (rc)
-					goto bad_sub;
-				/* we've done our job */
-				dkey.mv_size = 0;
-			}
-			if (!(leaf->mn_flags & F_SUBDATA) || sub_root) {
-				/* Adjust other cursors pointing to mp */
-				MDB_cursor *m2;
-				MDB_xcursor *mx = mc->mc_xcursor;
-				unsigned i = mc->mc_top;
-				MDB_page *mp = mc->mc_pg[i];
-
-				for (m2 = mc->mc_txn->mt_cursors[mc->mc_dbi]; m2; m2=m2->mc_next) {
-					if (m2 == mc || m2->mc_snum < mc->mc_snum) continue;
-					if (!(m2->mc_flags & C_INITIALIZED)) continue;
-					if (m2->mc_pg[i] == mp) {
-						if (m2->mc_ki[i] == mc->mc_ki[i]) {
-							mdb_xcursor_init2(m2, mx, new_dupdata);
-						} else if (!insert_key) {
-							XCURSOR_REFRESH(m2, i, mp);
-						}
-					}
-				}
-			}
-			ecount = mc->mc_xcursor->mx_db.md_entries;
-			if (flags & MDB_APPENDDUP)
-				xflags |= MDB_APPEND;
-			rc = mdb_cursor_put(&mc->mc_xcursor->mx_cursor, data, &xdata, xflags);
-			if (flags & F_SUBDATA) {
-				void *db = NODEDATA(leaf);
-				memcpy(db, &mc->mc_xcursor->mx_db, sizeof(MDB_db));
-			}
-			insert_data = mc->mc_xcursor->mx_db.md_entries - ecount;
-		}
-		/* Increment count unless we just replaced an existing item. */
-		if (insert_data)
-			mc->mc_db->md_entries++;
-		if (insert_key) {
-			/* Invalidate txn if we created an empty sub-DB */
-			if (rc)
-				goto bad_sub;
-			/* If we succeeded and the key didn't exist before,
-			 * make sure the cursor is marked valid.
-			 */
-			mc->mc_flags |= C_INITIALIZED;
-		}
-		if (flags & MDB_MULTIPLE) {
-			if (!rc) {
-				mcount++;
-				/* let caller know how many succeeded, if any */
-				data[1].mv_size = mcount;
-				if (mcount < dcount) {
-					data[0].mv_data = (char *)data[0].mv_data + data[0].mv_size;
-					insert_key = insert_data = 0;
-					goto more;
-				}
-			}
-		}
-		return rc;
-bad_sub:
-		if (rc == MDB_KEYEXIST)	/* should not happen, we deleted that item */
-			rc = MDB_CORRUPTED;
-	}
-	mc->mc_txn->mt_flags |= MDB_TXN_ERROR;
-	return rc;
-}
-
-int
-mdb_cursor_del(MDB_cursor *mc, unsigned int flags)
-{
-	MDB_node	*leaf;
-	MDB_page	*mp;
-	int rc;
-
-	if (mc->mc_txn->mt_flags & (MDB_TXN_RDONLY|MDB_TXN_BLOCKED))
-		return (mc->mc_txn->mt_flags & MDB_TXN_RDONLY) ? EACCES : MDB_BAD_TXN;
-
-	if (!(mc->mc_flags & C_INITIALIZED))
-		return EINVAL;
-
-	if (mc->mc_ki[mc->mc_top] >= NUMKEYS(mc->mc_pg[mc->mc_top]))
-		return MDB_NOTFOUND;
-
-	if (!(flags & MDB_NOSPILL) && (rc = mdb_page_spill(mc, NULL, NULL)))
-		return rc;
-
-	rc = mdb_cursor_touch(mc);
-	if (rc)
-		return rc;
-
-	mp = mc->mc_pg[mc->mc_top];
-	if (IS_LEAF2(mp))
-		goto del_key;
-	leaf = NODEPTR(mp, mc->mc_ki[mc->mc_top]);
-
-	if (F_ISSET(leaf->mn_flags, F_DUPDATA)) {
-		if (flags & MDB_NODUPDATA) {
-			/* mdb_cursor_del0() will subtract the final entry */
-			mc->mc_db->md_entries -= mc->mc_xcursor->mx_db.md_entries - 1;
-			mc->mc_xcursor->mx_cursor.mc_flags &= ~C_INITIALIZED;
-		} else {
-			if (!F_ISSET(leaf->mn_flags, F_SUBDATA)) {
-				mc->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(leaf);
-			}
-			rc = mdb_cursor_del(&mc->mc_xcursor->mx_cursor, MDB_NOSPILL);
-			if (rc)
-				return rc;
-			/* If sub-DB still has entries, we're done */
-			if (mc->mc_xcursor->mx_db.md_entries) {
-				if (leaf->mn_flags & F_SUBDATA) {
-					/* update subDB info */
-					void *db = NODEDATA(leaf);
-					memcpy(db, &mc->mc_xcursor->mx_db, sizeof(MDB_db));
-				} else {
-					MDB_cursor *m2;
-					/* shrink fake page */
-					mdb_node_shrink(mp, mc->mc_ki[mc->mc_top]);
-					leaf = NODEPTR(mp, mc->mc_ki[mc->mc_top]);
-					mc->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(leaf);
-					/* fix other sub-DB cursors pointed at fake pages on this page */
-					for (m2 = mc->mc_txn->mt_cursors[mc->mc_dbi]; m2; m2=m2->mc_next) {
-						if (m2 == mc || m2->mc_snum < mc->mc_snum) continue;
-						if (!(m2->mc_flags & C_INITIALIZED)) continue;
-						if (m2->mc_pg[mc->mc_top] == mp) {
-							XCURSOR_REFRESH(m2, mc->mc_top, mp);
-						}
-					}
-				}
-				mc->mc_db->md_entries--;
-				return rc;
-			} else {
-				mc->mc_xcursor->mx_cursor.mc_flags &= ~C_INITIALIZED;
-			}
-			/* otherwise fall thru and delete the sub-DB */
-		}
-
-		if (leaf->mn_flags & F_SUBDATA) {
-			/* add all the child DB's pages to the free list */
-			rc = mdb_drop0(&mc->mc_xcursor->mx_cursor, 0);
-			if (rc)
-				goto fail;
-		}
-	}
-	/* LMDB passes F_SUBDATA in 'flags' to delete a DB record */
-	else if ((leaf->mn_flags ^ flags) & F_SUBDATA) {
-		rc = MDB_INCOMPATIBLE;
-		goto fail;
-	}
-
-	/* add overflow pages to free list */
-	if (F_ISSET(leaf->mn_flags, F_BIGDATA)) {
-		MDB_page *omp;
-		pgno_t pg;
-
-		memcpy(&pg, NODEDATA(leaf), sizeof(pg));
-		if ((rc = mdb_page_get(mc, pg, &omp, NULL)) ||
-			(rc = mdb_ovpage_free(mc, omp)))
-			goto fail;
-	}
-
-del_key:
-	return mdb_cursor_del0(mc);
-
-fail:
-	mc->mc_txn->mt_flags |= MDB_TXN_ERROR;
-	return rc;
-}
-
-/** Allocate and initialize new pages for a database.
- * Set #MDB_TXN_ERROR on failure.
- * @param[in] mc a cursor on the database being added to.
- * @param[in] flags flags defining what type of page is being allocated.
- * @param[in] num the number of pages to allocate. This is usually 1,
- * unless allocating overflow pages for a large record.
- * @param[out] mp Address of a page, or NULL on failure.
- * @return 0 on success, non-zero on failure.
- */
-static int
-mdb_page_new(MDB_cursor *mc, uint32_t flags, int num, MDB_page **mp)
-{
-	MDB_page	*np;
-	int rc;
-
-	if ((rc = mdb_page_alloc(mc, num, &np)))
-		return rc;
-	DPRINTF(("allocated new mpage %"Z"u, page size %u",
-	    np->mp_pgno, mc->mc_txn->mt_env->me_psize));
-	np->mp_flags = flags | P_DIRTY;
-	np->mp_lower = (PAGEHDRSZ-PAGEBASE);
-	np->mp_upper = mc->mc_txn->mt_env->me_psize - PAGEBASE;
-
-	if (IS_BRANCH(np))
-		mc->mc_db->md_branch_pages++;
-	else if (IS_LEAF(np))
-		mc->mc_db->md_leaf_pages++;
-	else if (IS_OVERFLOW(np)) {
-		mc->mc_db->md_overflow_pages += num;
-		np->mp_pages = num;
-	}
-	*mp = np;
-
-	return 0;
-}
-
-/** Calculate the size of a leaf node.
- * The size depends on the environment's page size; if a data item
- * is too large it will be put onto an overflow page and the node
- * size will only include the key and not the data. Sizes are always
- * rounded up to an even number of bytes, to guarantee 2-byte alignment
- * of the #MDB_node headers.
- * @param[in] env The environment handle.
- * @param[in] key The key for the node.
- * @param[in] data The data for the node.
- * @return The number of bytes needed to store the node.
- */
-static size_t
-mdb_leaf_size(MDB_env *env, MDB_val *key, MDB_val *data)
-{
-	size_t		 sz;
-
-	sz = LEAFSIZE(key, data);
-	if (sz > env->me_nodemax) {
-		/* put on overflow page */
-		sz -= data->mv_size - sizeof(pgno_t);
-	}
-
-	return EVEN(sz + sizeof(indx_t));
-}
-
-/** Calculate the size of a branch node.
- * The size should depend on the environment's page size but since
- * we currently don't support spilling large keys onto overflow
- * pages, it's simply the size of the #MDB_node header plus the
- * size of the key. Sizes are always rounded up to an even number
- * of bytes, to guarantee 2-byte alignment of the #MDB_node headers.
- * @param[in] env The environment handle.
- * @param[in] key The key for the node.
- * @return The number of bytes needed to store the node.
- */
-static size_t
-mdb_branch_size(MDB_env *env, MDB_val *key)
-{
-	size_t		 sz;
-
-	sz = INDXSIZE(key);
-	if (sz > env->me_nodemax) {
-		/* put on overflow page */
-		/* not implemented */
-		/* sz -= key->size - sizeof(pgno_t); */
-	}
-
-	return sz + sizeof(indx_t);
-}
-
-/** Add a node to the page pointed to by the cursor.
- * Set #MDB_TXN_ERROR on failure.
- * @param[in] mc The cursor for this operation.
- * @param[in] indx The index on the page where the new node should be added.
- * @param[in] key The key for the new node.
- * @param[in] data The data for the new node, if any.
- * @param[in] pgno The page number, if adding a branch node.
- * @param[in] flags Flags for the node.
- * @return 0 on success, non-zero on failure. Possible errors are:
- * <ul>
- *	<li>ENOMEM - failed to allocate overflow pages for the node.
- *	<li>MDB_PAGE_FULL - there is insufficient room in the page. This error
- *	should never happen since all callers already calculate the
- *	page's free space before calling this function.
- * </ul>
- */
-static int
-mdb_node_add(MDB_cursor *mc, indx_t indx,
-    MDB_val *key, MDB_val *data, pgno_t pgno, unsigned int flags)
-{
-	unsigned int	 i;
-	size_t		 node_size = NODESIZE;
-	ssize_t		 room;
-	indx_t		 ofs;
-	MDB_node	*node;
-	MDB_page	*mp = mc->mc_pg[mc->mc_top];
-	MDB_page	*ofp = NULL;		/* overflow page */
-	void		*ndata;
-	DKBUF;
-
-	mdb_cassert(mc, mp->mp_upper >= mp->mp_lower);
-
-	DPRINTF(("add to %s %spage %"Z"u index %i, data size %"Z"u key size %"Z"u [%s]",
-	    IS_LEAF(mp) ? "leaf" : "branch",
-		IS_SUBP(mp) ? "sub-" : "",
-		mdb_dbg_pgno(mp), indx, data ? data->mv_size : 0,
-		key ? key->mv_size : 0, key ? DKEY(key) : "null"));
-
-	if (IS_LEAF2(mp)) {
-		/* Move higher keys up one slot. */
-		int ksize = mc->mc_db->md_pad, dif;
-		char *ptr = LEAF2KEY(mp, indx, ksize);
-		dif = NUMKEYS(mp) - indx;
-		if (dif > 0)
-			memmove(ptr+ksize, ptr, dif*ksize);
-		/* insert new key */
-		memcpy(ptr, key->mv_data, ksize);
-
-		/* Just using these for counting */
-		mp->mp_lower += sizeof(indx_t);
-		mp->mp_upper -= ksize - sizeof(indx_t);
-		return MDB_SUCCESS;
-	}
-
-	room = (ssize_t)SIZELEFT(mp) - (ssize_t)sizeof(indx_t);
-	if (key != NULL)
-		node_size += key->mv_size;
-	if (IS_LEAF(mp)) {
-		mdb_cassert(mc, key && data);
-		if (F_ISSET(flags, F_BIGDATA)) {
-			/* Data already on overflow page. */
-			node_size += sizeof(pgno_t);
-		} else if (node_size + data->mv_size > mc->mc_txn->mt_env->me_nodemax) {
-			int ovpages = OVPAGES(data->mv_size, mc->mc_txn->mt_env->me_psize);
-			int rc;
-			/* Put data on overflow page. */
-			DPRINTF(("data size is %"Z"u, node would be %"Z"u, put data on overflow page",
-			    data->mv_size, node_size+data->mv_size));
-			node_size = EVEN(node_size + sizeof(pgno_t));
-			if ((ssize_t)node_size > room)
-				goto full;
-			if ((rc = mdb_page_new(mc, P_OVERFLOW, ovpages, &ofp)))
-				return rc;
-			DPRINTF(("allocated overflow page %"Z"u", ofp->mp_pgno));
-			flags |= F_BIGDATA;
-			goto update;
-		} else {
-			node_size += data->mv_size;
-		}
-	}
-	node_size = EVEN(node_size);
-	if ((ssize_t)node_size > room)
-		goto full;
-
-update:
-	/* Move higher pointers up one slot. */
-	for (i = NUMKEYS(mp); i > indx; i--)
-		mp->mp_ptrs[i] = mp->mp_ptrs[i - 1];
-
-	/* Adjust free space offsets. */
-	ofs = mp->mp_upper - node_size;
-	mdb_cassert(mc, ofs >= mp->mp_lower + sizeof(indx_t));
-	mp->mp_ptrs[indx] = ofs;
-	mp->mp_upper = ofs;
-	mp->mp_lower += sizeof(indx_t);
-
-	/* Write the node data. */
-	node = NODEPTR(mp, indx);
-	node->mn_ksize = (key == NULL) ? 0 : key->mv_size;
-	node->mn_flags = flags;
-	if (IS_LEAF(mp))
-		SETDSZ(node,data->mv_size);
-	else
-		SETPGNO(node,pgno);
-
-	if (key)
-		memcpy(NODEKEY(node), key->mv_data, key->mv_size);
-
-	if (IS_LEAF(mp)) {
-		ndata = NODEDATA(node);
-		if (ofp == NULL) {
-			if (F_ISSET(flags, F_BIGDATA))
-				memcpy(ndata, data->mv_data, sizeof(pgno_t));
-			else if (F_ISSET(flags, MDB_RESERVE))
-				data->mv_data = ndata;
-			else
-				memcpy(ndata, data->mv_data, data->mv_size);
-		} else {
-			memcpy(ndata, &ofp->mp_pgno, sizeof(pgno_t));
-			ndata = METADATA(ofp);
-			if (F_ISSET(flags, MDB_RESERVE))
-				data->mv_data = ndata;
-			else
-				memcpy(ndata, data->mv_data, data->mv_size);
-		}
-	}
-
-	return MDB_SUCCESS;
-
-full:
-	DPRINTF(("not enough room in page %"Z"u, got %u ptrs",
-		mdb_dbg_pgno(mp), NUMKEYS(mp)));
-	DPRINTF(("upper-lower = %u - %u = %"Z"d", mp->mp_upper,mp->mp_lower,room));
-	DPRINTF(("node size = %"Z"u", node_size));
-	mc->mc_txn->mt_flags |= MDB_TXN_ERROR;
-	return MDB_PAGE_FULL;
-}
-
-/** Delete the specified node from a page.
- * @param[in] mc Cursor pointing to the node to delete.
- * @param[in] ksize The size of a node. Only used if the page is
- * part of a #MDB_DUPFIXED database.
- */
-static void
-mdb_node_del(MDB_cursor *mc, int ksize)
-{
-	MDB_page *mp = mc->mc_pg[mc->mc_top];
-	indx_t	indx = mc->mc_ki[mc->mc_top];
-	unsigned int	 sz;
-	indx_t		 i, j, numkeys, ptr;
-	MDB_node	*node;
-	char		*base;
-
-	DPRINTF(("delete node %u on %s page %"Z"u", indx,
-	    IS_LEAF(mp) ? "leaf" : "branch", mdb_dbg_pgno(mp)));
-	numkeys = NUMKEYS(mp);
-	mdb_cassert(mc, indx < numkeys);
-
-	if (IS_LEAF2(mp)) {
-		int x = numkeys - 1 - indx;
-		base = LEAF2KEY(mp, indx, ksize);
-		if (x)
-			memmove(base, base + ksize, x * ksize);
-		mp->mp_lower -= sizeof(indx_t);
-		mp->mp_upper += ksize - sizeof(indx_t);
-		return;
-	}
-
-	node = NODEPTR(mp, indx);
-	sz = NODESIZE + node->mn_ksize;
-	if (IS_LEAF(mp)) {
-		if (F_ISSET(node->mn_flags, F_BIGDATA))
-			sz += sizeof(pgno_t);
-		else
-			sz += NODEDSZ(node);
-	}
-	sz = EVEN(sz);
-
-	ptr = mp->mp_ptrs[indx];
-	for (i = j = 0; i < numkeys; i++) {
-		if (i != indx) {
-			mp->mp_ptrs[j] = mp->mp_ptrs[i];
-			if (mp->mp_ptrs[i] < ptr)
-				mp->mp_ptrs[j] += sz;
-			j++;
-		}
-	}
-
-	base = (char *)mp + mp->mp_upper + PAGEBASE;
-	memmove(base + sz, base, ptr - mp->mp_upper);
-
-	mp->mp_lower -= sizeof(indx_t);
-	mp->mp_upper += sz;
-}
-
-/** Compact the main page after deleting a node on a subpage.
- * @param[in] mp The main page to operate on.
- * @param[in] indx The index of the subpage on the main page.
- */
-static void
-mdb_node_shrink(MDB_page *mp, indx_t indx)
-{
-	MDB_node *node;
-	MDB_page *sp, *xp;
-	char *base;
-	indx_t delta, nsize, len, ptr;
-	int i;
-
-	node = NODEPTR(mp, indx);
-	sp = (MDB_page *)NODEDATA(node);
-	delta = SIZELEFT(sp);
-	nsize = NODEDSZ(node) - delta;
-
-	/* Prepare to shift upward, set len = length(subpage part to shift) */
-	if (IS_LEAF2(sp)) {
-		len = nsize;
-		if (nsize & 1)
-			return;		/* do not make the node uneven-sized */
-	} else {
-		xp = (MDB_page *)((char *)sp + delta); /* destination subpage */
-		for (i = NUMKEYS(sp); --i >= 0; )
-			xp->mp_ptrs[i] = sp->mp_ptrs[i] - delta;
-		len = PAGEHDRSZ;
-	}
-	sp->mp_upper = sp->mp_lower;
-	COPY_PGNO(sp->mp_pgno, mp->mp_pgno);
-	SETDSZ(node, nsize);
-
-	/* Shift <lower nodes...initial part of subpage> upward */
-	base = (char *)mp + mp->mp_upper + PAGEBASE;
-	memmove(base + delta, base, (char *)sp + len - base);
-
-	ptr = mp->mp_ptrs[indx];
-	for (i = NUMKEYS(mp); --i >= 0; ) {
-		if (mp->mp_ptrs[i] <= ptr)
-			mp->mp_ptrs[i] += delta;
-	}
-	mp->mp_upper += delta;
-}
-
-/** Initial setup of a sorted-dups cursor.
- * Sorted duplicates are implemented as a sub-database for the given key.
- * The duplicate data items are actually keys of the sub-database.
- * Operations on the duplicate data items are performed using a sub-cursor
- * initialized when the sub-database is first accessed. This function does
- * the preliminary setup of the sub-cursor, filling in the fields that
- * depend only on the parent DB.
- * @param[in] mc The main cursor whose sorted-dups cursor is to be initialized.
- */
-static void
-mdb_xcursor_init0(MDB_cursor *mc)
-{
-	MDB_xcursor *mx = mc->mc_xcursor;
-
-	mx->mx_cursor.mc_xcursor = NULL;
-	mx->mx_cursor.mc_txn = mc->mc_txn;
-	mx->mx_cursor.mc_db = &mx->mx_db;
-	mx->mx_cursor.mc_dbx = &mx->mx_dbx;
-	mx->mx_cursor.mc_dbi = mc->mc_dbi;
-	mx->mx_cursor.mc_dbflag = &mx->mx_dbflag;
-	mx->mx_cursor.mc_snum = 0;
-	mx->mx_cursor.mc_top = 0;
-	mx->mx_cursor.mc_flags = C_SUB;
-	mx->mx_dbx.md_name.mv_size = 0;
-	mx->mx_dbx.md_name.mv_data = NULL;
-	mx->mx_dbx.md_cmp = mc->mc_dbx->md_dcmp;
-	mx->mx_dbx.md_dcmp = NULL;
-	mx->mx_dbx.md_rel = mc->mc_dbx->md_rel;
-}
-
-/** Final setup of a sorted-dups cursor.
- *	Sets up the fields that depend on the data from the main cursor.
- * @param[in] mc The main cursor whose sorted-dups cursor is to be initialized.
- * @param[in] node The data containing the #MDB_db record for the
- * sorted-dup database.
- */
-static void
-mdb_xcursor_init1(MDB_cursor *mc, MDB_node *node)
-{
-	MDB_xcursor *mx = mc->mc_xcursor;
-
-	if (node->mn_flags & F_SUBDATA) {
-		memcpy(&mx->mx_db, NODEDATA(node), sizeof(MDB_db));
-		mx->mx_cursor.mc_pg[0] = 0;
-		mx->mx_cursor.mc_snum = 0;
-		mx->mx_cursor.mc_top = 0;
-		mx->mx_cursor.mc_flags = C_SUB;
-	} else {
-		MDB_page *fp = NODEDATA(node);
-		mx->mx_db.md_pad = 0;
-		mx->mx_db.md_flags = 0;
-		mx->mx_db.md_depth = 1;
-		mx->mx_db.md_branch_pages = 0;
-		mx->mx_db.md_leaf_pages = 1;
-		mx->mx_db.md_overflow_pages = 0;
-		mx->mx_db.md_entries = NUMKEYS(fp);
-		COPY_PGNO(mx->mx_db.md_root, fp->mp_pgno);
-		mx->mx_cursor.mc_snum = 1;
-		mx->mx_cursor.mc_top = 0;
-		mx->mx_cursor.mc_flags = C_INITIALIZED|C_SUB;
-		mx->mx_cursor.mc_pg[0] = fp;
-		mx->mx_cursor.mc_ki[0] = 0;
-		if (mc->mc_db->md_flags & MDB_DUPFIXED) {
-			mx->mx_db.md_flags = MDB_DUPFIXED;
-			mx->mx_db.md_pad = fp->mp_pad;
-			if (mc->mc_db->md_flags & MDB_INTEGERDUP)
-				mx->mx_db.md_flags |= MDB_INTEGERKEY;
-		}
-	}
-	DPRINTF(("Sub-db -%u root page %"Z"u", mx->mx_cursor.mc_dbi,
-		mx->mx_db.md_root));
-	mx->mx_dbflag = DB_VALID|DB_USRVALID|DB_DUPDATA;
-#if UINT_MAX < SIZE_MAX
-	if (mx->mx_dbx.md_cmp == mdb_cmp_int && mx->mx_db.md_pad == sizeof(size_t))
-		mx->mx_dbx.md_cmp = mdb_cmp_clong;
-#endif
-}
-
-
-/** Fixup a sorted-dups cursor due to underlying update.
- *	Sets up some fields that depend on the data from the main cursor.
- *	Almost the same as init1, but skips initialization steps if the
- *	xcursor had already been used.
- * @param[in] mc The main cursor whose sorted-dups cursor is to be fixed up.
- * @param[in] src_mx The xcursor of an up-to-date cursor.
- * @param[in] new_dupdata True if converting from a non-#F_DUPDATA item.
- */
-static void
-mdb_xcursor_init2(MDB_cursor *mc, MDB_xcursor *src_mx, int new_dupdata)
-{
-	MDB_xcursor *mx = mc->mc_xcursor;
-
-	if (new_dupdata) {
-		mx->mx_cursor.mc_snum = 1;
-		mx->mx_cursor.mc_top = 0;
-		mx->mx_cursor.mc_flags |= C_INITIALIZED;
-		mx->mx_cursor.mc_ki[0] = 0;
-		mx->mx_dbflag = DB_VALID|DB_USRVALID|DB_DUPDATA;
-#if UINT_MAX < SIZE_MAX
-		mx->mx_dbx.md_cmp = src_mx->mx_dbx.md_cmp;
-#endif
-	} else if (!(mx->mx_cursor.mc_flags & C_INITIALIZED)) {
-		return;
-	}
-	mx->mx_db = src_mx->mx_db;
-	mx->mx_cursor.mc_pg[0] = src_mx->mx_cursor.mc_pg[0];
-	DPRINTF(("Sub-db -%u root page %"Z"u", mx->mx_cursor.mc_dbi,
-		mx->mx_db.md_root));
-}
-
-/** Initialize a cursor for a given transaction and database. */
-static void
-mdb_cursor_init(MDB_cursor *mc, MDB_txn *txn, MDB_dbi dbi, MDB_xcursor *mx)
-{
-	mc->mc_next = NULL;
-	mc->mc_backup = NULL;
-	mc->mc_dbi = dbi;
-	mc->mc_txn = txn;
-	mc->mc_db = &txn->mt_dbs[dbi];
-	mc->mc_dbx = &txn->mt_dbxs[dbi];
-	mc->mc_dbflag = &txn->mt_dbflags[dbi];
-	mc->mc_snum = 0;
-	mc->mc_top = 0;
-	mc->mc_pg[0] = 0;
-	mc->mc_ki[0] = 0;
-	mc->mc_flags = 0;
-	if (txn->mt_dbs[dbi].md_flags & MDB_DUPSORT) {
-		mdb_tassert(txn, mx != NULL);
-		mc->mc_xcursor = mx;
-		mdb_xcursor_init0(mc);
-	} else {
-		mc->mc_xcursor = NULL;
-	}
-	if (*mc->mc_dbflag & DB_STALE) {
-		mdb_page_search(mc, NULL, MDB_PS_ROOTONLY);
-	}
-}
-
-int
-mdb_cursor_open(MDB_txn *txn, MDB_dbi dbi, MDB_cursor **ret)
-{
-	MDB_cursor	*mc;
-	size_t size = sizeof(MDB_cursor);
-
-	if (!ret || !TXN_DBI_EXIST(txn, dbi, DB_VALID))
-		return EINVAL;
-
-	if (txn->mt_flags & MDB_TXN_BLOCKED)
-		return MDB_BAD_TXN;
-
-	if (dbi == FREE_DBI && !F_ISSET(txn->mt_flags, MDB_TXN_RDONLY))
-		return EINVAL;
-
-	if (txn->mt_dbs[dbi].md_flags & MDB_DUPSORT)
-		size += sizeof(MDB_xcursor);
-
-	if ((mc = malloc(size)) != NULL) {
-		mdb_cursor_init(mc, txn, dbi, (MDB_xcursor *)(mc + 1));
-		if (txn->mt_cursors) {
-			mc->mc_next = txn->mt_cursors[dbi];
-			txn->mt_cursors[dbi] = mc;
-			mc->mc_flags |= C_UNTRACK;
-		}
-	} else {
-		return ENOMEM;
-	}
-
-	*ret = mc;
-
-	return MDB_SUCCESS;
-}
-
-int
-mdb_cursor_renew(MDB_txn *txn, MDB_cursor *mc)
-{
-	if (!mc || !TXN_DBI_EXIST(txn, mc->mc_dbi, DB_VALID))
-		return EINVAL;
-
-	if ((mc->mc_flags & C_UNTRACK) || txn->mt_cursors)
-		return EINVAL;
-
-	if (txn->mt_flags & MDB_TXN_BLOCKED)
-		return MDB_BAD_TXN;
-
-	mdb_cursor_init(mc, txn, mc->mc_dbi, mc->mc_xcursor);
-	return MDB_SUCCESS;
-}
-
-/* Return the count of duplicate data items for the current key */
-int
-mdb_cursor_count(MDB_cursor *mc, size_t *countp)
-{
-	MDB_node	*leaf;
-
-	if (mc == NULL || countp == NULL)
-		return EINVAL;
-
-	if (mc->mc_xcursor == NULL)
-		return MDB_INCOMPATIBLE;
-
-	if (mc->mc_txn->mt_flags & MDB_TXN_BLOCKED)
-		return MDB_BAD_TXN;
-
-	if (!(mc->mc_flags & C_INITIALIZED))
-		return EINVAL;
-
-	if (!mc->mc_snum)
-		return MDB_NOTFOUND;
-
-	if (mc->mc_flags & C_EOF) {
-		if (mc->mc_ki[mc->mc_top] >= NUMKEYS(mc->mc_pg[mc->mc_top]))
-			return MDB_NOTFOUND;
-		mc->mc_flags ^= C_EOF;
-	}
-
-	leaf = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]);
-	if (!F_ISSET(leaf->mn_flags, F_DUPDATA)) {
-		*countp = 1;
-	} else {
-		if (!(mc->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED))
-			return EINVAL;
-
-		*countp = mc->mc_xcursor->mx_db.md_entries;
-	}
-	return MDB_SUCCESS;
-}
-
-void
-mdb_cursor_close(MDB_cursor *mc)
-{
-	if (mc && !mc->mc_backup) {
-		/* remove from txn, if tracked */
-		if ((mc->mc_flags & C_UNTRACK) && mc->mc_txn->mt_cursors) {
-			MDB_cursor **prev = &mc->mc_txn->mt_cursors[mc->mc_dbi];
-			while (*prev && *prev != mc) prev = &(*prev)->mc_next;
-			if (*prev == mc)
-				*prev = mc->mc_next;
-		}
-		free(mc);
-	}
-}
-
-MDB_txn *
-mdb_cursor_txn(MDB_cursor *mc)
-{
-	if (!mc) return NULL;
-	return mc->mc_txn;
-}
-
-MDB_dbi
-mdb_cursor_dbi(MDB_cursor *mc)
-{
-	return mc->mc_dbi;
-}
-
-/** Replace the key for a branch node with a new key.
- * Set #MDB_TXN_ERROR on failure.
- * @param[in] mc Cursor pointing to the node to operate on.
- * @param[in] key The new key to use.
- * @return 0 on success, non-zero on failure.
- */
-static int
-mdb_update_key(MDB_cursor *mc, MDB_val *key)
-{
-	MDB_page		*mp;
-	MDB_node		*node;
-	char			*base;
-	size_t			 len;
-	int				 delta, ksize, oksize;
-	indx_t			 ptr, i, numkeys, indx;
-	DKBUF;
-
-	indx = mc->mc_ki[mc->mc_top];
-	mp = mc->mc_pg[mc->mc_top];
-	node = NODEPTR(mp, indx);
-	ptr = mp->mp_ptrs[indx];
-#if MDB_DEBUG
-	{
-		MDB_val	k2;
-		char kbuf2[DKBUF_MAXKEYSIZE*2+1];
-		k2.mv_data = NODEKEY(node);
-		k2.mv_size = node->mn_ksize;
-		DPRINTF(("update key %u (ofs %u) [%s] to [%s] on page %"Z"u",
-			indx, ptr,
-			mdb_dkey(&k2, kbuf2),
-			DKEY(key),
-			mp->mp_pgno));
-	}
-#endif
-
-	/* Sizes must be 2-byte aligned. */
-	ksize = EVEN(key->mv_size);
-	oksize = EVEN(node->mn_ksize);
-	delta = ksize - oksize;
-
-	/* Shift node contents if EVEN(key length) changed. */
-	if (delta) {
-		if (delta > 0 && SIZELEFT(mp) < delta) {
-			pgno_t pgno;
-			/* not enough space left, do a delete and split */
-			DPRINTF(("Not enough room, delta = %d, splitting...", delta));
-			pgno = NODEPGNO(node);
-			mdb_node_del(mc, 0);
-			return mdb_page_split(mc, key, NULL, pgno, MDB_SPLIT_REPLACE);
-		}
-
-		numkeys = NUMKEYS(mp);
-		for (i = 0; i < numkeys; i++) {
-			if (mp->mp_ptrs[i] <= ptr)
-				mp->mp_ptrs[i] -= delta;
-		}
-
-		base = (char *)mp + mp->mp_upper + PAGEBASE;
-		len = ptr - mp->mp_upper + NODESIZE;
-		memmove(base - delta, base, len);
-		mp->mp_upper -= delta;
-
-		node = NODEPTR(mp, indx);
-	}
-
-	/* But even if no shift was needed, update ksize */
-	if (node->mn_ksize != key->mv_size)
-		node->mn_ksize = key->mv_size;
-
-	if (key->mv_size)
-		memcpy(NODEKEY(node), key->mv_data, key->mv_size);
-
-	return MDB_SUCCESS;
-}
-
-static void
-mdb_cursor_copy(const MDB_cursor *csrc, MDB_cursor *cdst);
-
-/** Perform \b act while tracking temporary cursor \b mn */
-#define WITH_CURSOR_TRACKING(mn, act) do { \
-	MDB_cursor dummy, *tracked, **tp = &(mn).mc_txn->mt_cursors[mn.mc_dbi]; \
-	if ((mn).mc_flags & C_SUB) { \
-		dummy.mc_flags =  C_INITIALIZED; \
-		dummy.mc_xcursor = (MDB_xcursor *)&(mn);	\
-		tracked = &dummy; \
-	} else { \
-		tracked = &(mn); \
-	} \
-	tracked->mc_next = *tp; \
-	*tp = tracked; \
-	{ act; } \
-	*tp = tracked->mc_next; \
-} while (0)
-
-/** Move a node from csrc to cdst.
- */
-static int
-mdb_node_move(MDB_cursor *csrc, MDB_cursor *cdst, int fromleft)
-{
-	MDB_node		*srcnode;
-	MDB_val		 key, data;
-	pgno_t	srcpg;
-	MDB_cursor mn;
-	int			 rc;
-	unsigned short flags;
-
-	DKBUF;
-
-	/* Mark src and dst as dirty. */
-	if ((rc = mdb_page_touch(csrc)) ||
-	    (rc = mdb_page_touch(cdst)))
-		return rc;
-
-	if (IS_LEAF2(csrc->mc_pg[csrc->mc_top])) {
-		key.mv_size = csrc->mc_db->md_pad;
-		key.mv_data = LEAF2KEY(csrc->mc_pg[csrc->mc_top], csrc->mc_ki[csrc->mc_top], key.mv_size);
-		data.mv_size = 0;
-		data.mv_data = NULL;
-		srcpg = 0;
-		flags = 0;
-	} else {
-		srcnode = NODEPTR(csrc->mc_pg[csrc->mc_top], csrc->mc_ki[csrc->mc_top]);
-		mdb_cassert(csrc, !((size_t)srcnode & 1));
-		srcpg = NODEPGNO(srcnode);
-		flags = srcnode->mn_flags;
-		if (csrc->mc_ki[csrc->mc_top] == 0 && IS_BRANCH(csrc->mc_pg[csrc->mc_top])) {
-			unsigned int snum = csrc->mc_snum;
-			MDB_node *s2;
-			/* must find the lowest key below src */
-			rc = mdb_page_search_lowest(csrc);
-			if (rc)
-				return rc;
-			if (IS_LEAF2(csrc->mc_pg[csrc->mc_top])) {
-				key.mv_size = csrc->mc_db->md_pad;
-				key.mv_data = LEAF2KEY(csrc->mc_pg[csrc->mc_top], 0, key.mv_size);
-			} else {
-				s2 = NODEPTR(csrc->mc_pg[csrc->mc_top], 0);
-				key.mv_size = NODEKSZ(s2);
-				key.mv_data = NODEKEY(s2);
-			}
-			csrc->mc_snum = snum--;
-			csrc->mc_top = snum;
-		} else {
-			key.mv_size = NODEKSZ(srcnode);
-			key.mv_data = NODEKEY(srcnode);
-		}
-		data.mv_size = NODEDSZ(srcnode);
-		data.mv_data = NODEDATA(srcnode);
-	}
-	mn.mc_xcursor = NULL;
-	if (IS_BRANCH(cdst->mc_pg[cdst->mc_top]) && cdst->mc_ki[cdst->mc_top] == 0) {
-		unsigned int snum = cdst->mc_snum;
-		MDB_node *s2;
-		MDB_val bkey;
-		/* must find the lowest key below dst */
-		mdb_cursor_copy(cdst, &mn);
-		rc = mdb_page_search_lowest(&mn);
-		if (rc)
-			return rc;
-		if (IS_LEAF2(mn.mc_pg[mn.mc_top])) {
-			bkey.mv_size = mn.mc_db->md_pad;
-			bkey.mv_data = LEAF2KEY(mn.mc_pg[mn.mc_top], 0, bkey.mv_size);
-		} else {
-			s2 = NODEPTR(mn.mc_pg[mn.mc_top], 0);
-			bkey.mv_size = NODEKSZ(s2);
-			bkey.mv_data = NODEKEY(s2);
-		}
-		mn.mc_snum = snum--;
-		mn.mc_top = snum;
-		mn.mc_ki[snum] = 0;
-		rc = mdb_update_key(&mn, &bkey);
-		if (rc)
-			return rc;
-	}
-
-	DPRINTF(("moving %s node %u [%s] on page %"Z"u to node %u on page %"Z"u",
-	    IS_LEAF(csrc->mc_pg[csrc->mc_top]) ? "leaf" : "branch",
-	    csrc->mc_ki[csrc->mc_top],
-		DKEY(&key),
-	    csrc->mc_pg[csrc->mc_top]->mp_pgno,
-	    cdst->mc_ki[cdst->mc_top], cdst->mc_pg[cdst->mc_top]->mp_pgno));
-
-	/* Add the node to the destination page.
-	 */
-	rc = mdb_node_add(cdst, cdst->mc_ki[cdst->mc_top], &key, &data, srcpg, flags);
-	if (rc != MDB_SUCCESS)
-		return rc;
-
-	/* Delete the node from the source page.
-	 */
-	mdb_node_del(csrc, key.mv_size);
-
-	{
-		/* Adjust other cursors pointing to mp */
-		MDB_cursor *m2, *m3;
-		MDB_dbi dbi = csrc->mc_dbi;
-		MDB_page *mpd, *mps;
-
-		mps = csrc->mc_pg[csrc->mc_top];
-		/* If we're adding on the left, bump others up */
-		if (fromleft) {
-			mpd = cdst->mc_pg[csrc->mc_top];
-			for (m2 = csrc->mc_txn->mt_cursors[dbi]; m2; m2=m2->mc_next) {
-				if (csrc->mc_flags & C_SUB)
-					m3 = &m2->mc_xcursor->mx_cursor;
-				else
-					m3 = m2;
-				if (!(m3->mc_flags & C_INITIALIZED) || m3->mc_top < csrc->mc_top)
-					continue;
-				if (m3 != cdst &&
-					m3->mc_pg[csrc->mc_top] == mpd &&
-					m3->mc_ki[csrc->mc_top] >= cdst->mc_ki[csrc->mc_top]) {
-					m3->mc_ki[csrc->mc_top]++;
-				}
-				if (m3 !=csrc &&
-					m3->mc_pg[csrc->mc_top] == mps &&
-					m3->mc_ki[csrc->mc_top] == csrc->mc_ki[csrc->mc_top]) {
-					m3->mc_pg[csrc->mc_top] = cdst->mc_pg[cdst->mc_top];
-					m3->mc_ki[csrc->mc_top] = cdst->mc_ki[cdst->mc_top];
-					m3->mc_ki[csrc->mc_top-1]++;
-				}
-				if (IS_LEAF(mps))
-					XCURSOR_REFRESH(m3, csrc->mc_top, m3->mc_pg[csrc->mc_top]);
-			}
-		} else
-		/* Adding on the right, bump others down */
-		{
-			for (m2 = csrc->mc_txn->mt_cursors[dbi]; m2; m2=m2->mc_next) {
-				if (csrc->mc_flags & C_SUB)
-					m3 = &m2->mc_xcursor->mx_cursor;
-				else
-					m3 = m2;
-				if (m3 == csrc) continue;
-				if (!(m3->mc_flags & C_INITIALIZED) || m3->mc_top < csrc->mc_top)
-					continue;
-				if (m3->mc_pg[csrc->mc_top] == mps) {
-					if (!m3->mc_ki[csrc->mc_top]) {
-						m3->mc_pg[csrc->mc_top] = cdst->mc_pg[cdst->mc_top];
-						m3->mc_ki[csrc->mc_top] = cdst->mc_ki[cdst->mc_top];
-						m3->mc_ki[csrc->mc_top-1]--;
-					} else {
-						m3->mc_ki[csrc->mc_top]--;
-					}
-					if (IS_LEAF(mps))
-						XCURSOR_REFRESH(m3, csrc->mc_top, m3->mc_pg[csrc->mc_top]);
-				}
-			}
-		}
-	}
-
-	/* Update the parent separators.
-	 */
-	if (csrc->mc_ki[csrc->mc_top] == 0) {
-		if (csrc->mc_ki[csrc->mc_top-1] != 0) {
-			if (IS_LEAF2(csrc->mc_pg[csrc->mc_top])) {
-				key.mv_data = LEAF2KEY(csrc->mc_pg[csrc->mc_top], 0, key.mv_size);
-			} else {
-				srcnode = NODEPTR(csrc->mc_pg[csrc->mc_top], 0);
-				key.mv_size = NODEKSZ(srcnode);
-				key.mv_data = NODEKEY(srcnode);
-			}
-			DPRINTF(("update separator for source page %"Z"u to [%s]",
-				csrc->mc_pg[csrc->mc_top]->mp_pgno, DKEY(&key)));
-			mdb_cursor_copy(csrc, &mn);
-			mn.mc_snum--;
-			mn.mc_top--;
-			/* We want mdb_rebalance to find mn when doing fixups */
-			WITH_CURSOR_TRACKING(mn,
-				rc = mdb_update_key(&mn, &key));
-			if (rc)
-				return rc;
-		}
-		if (IS_BRANCH(csrc->mc_pg[csrc->mc_top])) {
-			MDB_val	 nullkey;
-			indx_t	ix = csrc->mc_ki[csrc->mc_top];
-			nullkey.mv_size = 0;
-			csrc->mc_ki[csrc->mc_top] = 0;
-			rc = mdb_update_key(csrc, &nullkey);
-			csrc->mc_ki[csrc->mc_top] = ix;
-			mdb_cassert(csrc, rc == MDB_SUCCESS);
-		}
-	}
-
-	if (cdst->mc_ki[cdst->mc_top] == 0) {
-		if (cdst->mc_ki[cdst->mc_top-1] != 0) {
-			if (IS_LEAF2(csrc->mc_pg[csrc->mc_top])) {
-				key.mv_data = LEAF2KEY(cdst->mc_pg[cdst->mc_top], 0, key.mv_size);
-			} else {
-				srcnode = NODEPTR(cdst->mc_pg[cdst->mc_top], 0);
-				key.mv_size = NODEKSZ(srcnode);
-				key.mv_data = NODEKEY(srcnode);
-			}
-			DPRINTF(("update separator for destination page %"Z"u to [%s]",
-				cdst->mc_pg[cdst->mc_top]->mp_pgno, DKEY(&key)));
-			mdb_cursor_copy(cdst, &mn);
-			mn.mc_snum--;
-			mn.mc_top--;
-			/* We want mdb_rebalance to find mn when doing fixups */
-			WITH_CURSOR_TRACKING(mn,
-				rc = mdb_update_key(&mn, &key));
-			if (rc)
-				return rc;
-		}
-		if (IS_BRANCH(cdst->mc_pg[cdst->mc_top])) {
-			MDB_val	 nullkey;
-			indx_t	ix = cdst->mc_ki[cdst->mc_top];
-			nullkey.mv_size = 0;
-			cdst->mc_ki[cdst->mc_top] = 0;
-			rc = mdb_update_key(cdst, &nullkey);
-			cdst->mc_ki[cdst->mc_top] = ix;
-			mdb_cassert(cdst, rc == MDB_SUCCESS);
-		}
-	}
-
-	return MDB_SUCCESS;
-}
-
-/** Merge one page into another.
- *  The nodes from the page pointed to by \b csrc will
- *	be copied to the page pointed to by \b cdst and then
- *	the \b csrc page will be freed.
- * @param[in] csrc Cursor pointing to the source page.
- * @param[in] cdst Cursor pointing to the destination page.
- * @return 0 on success, non-zero on failure.
- */
-static int
-mdb_page_merge(MDB_cursor *csrc, MDB_cursor *cdst)
-{
-	MDB_page	*psrc, *pdst;
-	MDB_node	*srcnode;
-	MDB_val		 key, data;
-	unsigned	 nkeys;
-	int			 rc;
-	indx_t		 i, j;
-
-	psrc = csrc->mc_pg[csrc->mc_top];
-	pdst = cdst->mc_pg[cdst->mc_top];
-
-	DPRINTF(("merging page %"Z"u into %"Z"u", psrc->mp_pgno, pdst->mp_pgno));
-
-	mdb_cassert(csrc, csrc->mc_snum > 1);	/* can't merge root page */
-	mdb_cassert(csrc, cdst->mc_snum > 1);
-
-	/* Mark dst as dirty. */
-	if ((rc = mdb_page_touch(cdst)))
-		return rc;
-
-	/* get dst page again now that we've touched it. */
-	pdst = cdst->mc_pg[cdst->mc_top];
-
-	/* Move all nodes from src to dst.
-	 */
-	j = nkeys = NUMKEYS(pdst);
-	if (IS_LEAF2(psrc)) {
-		key.mv_size = csrc->mc_db->md_pad;
-		key.mv_data = METADATA(psrc);
-		for (i = 0; i < NUMKEYS(psrc); i++, j++) {
-			rc = mdb_node_add(cdst, j, &key, NULL, 0, 0);
-			if (rc != MDB_SUCCESS)
-				return rc;
-			key.mv_data = (char *)key.mv_data + key.mv_size;
-		}
-	} else {
-		for (i = 0; i < NUMKEYS(psrc); i++, j++) {
-			srcnode = NODEPTR(psrc, i);
-			if (i == 0 && IS_BRANCH(psrc)) {
-				MDB_cursor mn;
-				MDB_node *s2;
-				mdb_cursor_copy(csrc, &mn);
-				mn.mc_xcursor = NULL;
-				/* must find the lowest key below src */
-				rc = mdb_page_search_lowest(&mn);
-				if (rc)
-					return rc;
-				if (IS_LEAF2(mn.mc_pg[mn.mc_top])) {
-					key.mv_size = mn.mc_db->md_pad;
-					key.mv_data = LEAF2KEY(mn.mc_pg[mn.mc_top], 0, key.mv_size);
-				} else {
-					s2 = NODEPTR(mn.mc_pg[mn.mc_top], 0);
-					key.mv_size = NODEKSZ(s2);
-					key.mv_data = NODEKEY(s2);
-				}
-			} else {
-				key.mv_size = srcnode->mn_ksize;
-				key.mv_data = NODEKEY(srcnode);
-			}
-
-			data.mv_size = NODEDSZ(srcnode);
-			data.mv_data = NODEDATA(srcnode);
-			rc = mdb_node_add(cdst, j, &key, &data, NODEPGNO(srcnode), srcnode->mn_flags);
-			if (rc != MDB_SUCCESS)
-				return rc;
-		}
-	}
-
-	DPRINTF(("dst page %"Z"u now has %u keys (%.1f%% filled)",
-	    pdst->mp_pgno, NUMKEYS(pdst),
-		(float)PAGEFILL(cdst->mc_txn->mt_env, pdst) / 10));
-
-	/* Unlink the src page from parent and add to free list.
-	 */
-	csrc->mc_top--;
-	mdb_node_del(csrc, 0);
-	if (csrc->mc_ki[csrc->mc_top] == 0) {
-		key.mv_size = 0;
-		rc = mdb_update_key(csrc, &key);
-		if (rc) {
-			csrc->mc_top++;
-			return rc;
-		}
-	}
-	csrc->mc_top++;
-
-	psrc = csrc->mc_pg[csrc->mc_top];
-	/* If not operating on FreeDB, allow this page to be reused
-	 * in this txn. Otherwise just add to free list.
-	 */
-	rc = mdb_page_loose(csrc, psrc);
-	if (rc)
-		return rc;
-	if (IS_LEAF(psrc))
-		csrc->mc_db->md_leaf_pages--;
-	else
-		csrc->mc_db->md_branch_pages--;
-	{
-		/* Adjust other cursors pointing to mp */
-		MDB_cursor *m2, *m3;
-		MDB_dbi dbi = csrc->mc_dbi;
-		unsigned int top = csrc->mc_top;
-
-		for (m2 = csrc->mc_txn->mt_cursors[dbi]; m2; m2=m2->mc_next) {
-			if (csrc->mc_flags & C_SUB)
-				m3 = &m2->mc_xcursor->mx_cursor;
-			else
-				m3 = m2;
-			if (m3 == csrc) continue;
-			if (m3->mc_snum < csrc->mc_snum) continue;
-			if (m3->mc_pg[top] == psrc) {
-				m3->mc_pg[top] = pdst;
-				m3->mc_ki[top] += nkeys;
-				m3->mc_ki[top-1] = cdst->mc_ki[top-1];
-			} else if (m3->mc_pg[top-1] == csrc->mc_pg[top-1] &&
-				m3->mc_ki[top-1] > csrc->mc_ki[top-1]) {
-				m3->mc_ki[top-1]--;
-			}
-			if (IS_LEAF(psrc))
-				XCURSOR_REFRESH(m3, top, m3->mc_pg[top]);
-		}
-	}
-	{
-		unsigned int snum = cdst->mc_snum;
-		uint16_t depth = cdst->mc_db->md_depth;
-		mdb_cursor_pop(cdst);
-		rc = mdb_rebalance(cdst);
-		/* Did the tree height change? */
-		if (depth != cdst->mc_db->md_depth)
-			snum += cdst->mc_db->md_depth - depth;
-		cdst->mc_snum = snum;
-		cdst->mc_top = snum-1;
-	}
-	return rc;
-}
-
-/** Copy the contents of a cursor.
- * @param[in] csrc The cursor to copy from.
- * @param[out] cdst The cursor to copy to.
- */
-static void
-mdb_cursor_copy(const MDB_cursor *csrc, MDB_cursor *cdst)
-{
-	unsigned int i;
-
-	cdst->mc_txn = csrc->mc_txn;
-	cdst->mc_dbi = csrc->mc_dbi;
-	cdst->mc_db  = csrc->mc_db;
-	cdst->mc_dbx = csrc->mc_dbx;
-	cdst->mc_snum = csrc->mc_snum;
-	cdst->mc_top = csrc->mc_top;
-	cdst->mc_flags = csrc->mc_flags;
-
-	for (i=0; i<csrc->mc_snum; i++) {
-		cdst->mc_pg[i] = csrc->mc_pg[i];
-		cdst->mc_ki[i] = csrc->mc_ki[i];
-	}
-}
-
-/** Rebalance the tree after a delete operation.
- * @param[in] mc Cursor pointing to the page where rebalancing
- * should begin.
- * @return 0 on success, non-zero on failure.
- */
-static int
-mdb_rebalance(MDB_cursor *mc)
-{
-	MDB_node	*node;
-	int rc, fromleft;
-	unsigned int ptop, minkeys, thresh;
-	MDB_cursor	mn;
-	indx_t oldki;
-
-	if (IS_BRANCH(mc->mc_pg[mc->mc_top])) {
-		minkeys = 2;
-		thresh = 1;
-	} else {
-		minkeys = 1;
-		thresh = FILL_THRESHOLD;
-	}
-	DPRINTF(("rebalancing %s page %"Z"u (has %u keys, %.1f%% full)",
-	    IS_LEAF(mc->mc_pg[mc->mc_top]) ? "leaf" : "branch",
-	    mdb_dbg_pgno(mc->mc_pg[mc->mc_top]), NUMKEYS(mc->mc_pg[mc->mc_top]),
-		(float)PAGEFILL(mc->mc_txn->mt_env, mc->mc_pg[mc->mc_top]) / 10));
-
-	if (PAGEFILL(mc->mc_txn->mt_env, mc->mc_pg[mc->mc_top]) >= thresh &&
-		NUMKEYS(mc->mc_pg[mc->mc_top]) >= minkeys) {
-		DPRINTF(("no need to rebalance page %"Z"u, above fill threshold",
-		    mdb_dbg_pgno(mc->mc_pg[mc->mc_top])));
-		return MDB_SUCCESS;
-	}
-
-	if (mc->mc_snum < 2) {
-		MDB_page *mp = mc->mc_pg[0];
-		if (IS_SUBP(mp)) {
-			DPUTS("Can't rebalance a subpage, ignoring");
-			return MDB_SUCCESS;
-		}
-		if (NUMKEYS(mp) == 0) {
-			DPUTS("tree is completely empty");
-			mc->mc_db->md_root = P_INVALID;
-			mc->mc_db->md_depth = 0;
-			mc->mc_db->md_leaf_pages = 0;
-			rc = mdb_midl_append(&mc->mc_txn->mt_free_pgs, mp->mp_pgno);
-			if (rc)
-				return rc;
-			/* Adjust cursors pointing to mp */
-			mc->mc_snum = 0;
-			mc->mc_top = 0;
-			mc->mc_flags &= ~C_INITIALIZED;
-			{
-				MDB_cursor *m2, *m3;
-				MDB_dbi dbi = mc->mc_dbi;
-
-				for (m2 = mc->mc_txn->mt_cursors[dbi]; m2; m2=m2->mc_next) {
-					if (mc->mc_flags & C_SUB)
-						m3 = &m2->mc_xcursor->mx_cursor;
-					else
-						m3 = m2;
-					if (!(m3->mc_flags & C_INITIALIZED) || (m3->mc_snum < mc->mc_snum))
-						continue;
-					if (m3->mc_pg[0] == mp) {
-						m3->mc_snum = 0;
-						m3->mc_top = 0;
-						m3->mc_flags &= ~C_INITIALIZED;
-					}
-				}
-			}
-		} else if (IS_BRANCH(mp) && NUMKEYS(mp) == 1) {
-			int i;
-			DPUTS("collapsing root page!");
-			rc = mdb_midl_append(&mc->mc_txn->mt_free_pgs, mp->mp_pgno);
-			if (rc)
-				return rc;
-			mc->mc_db->md_root = NODEPGNO(NODEPTR(mp, 0));
-			rc = mdb_page_get(mc, mc->mc_db->md_root, &mc->mc_pg[0], NULL);
-			if (rc)
-				return rc;
-			mc->mc_db->md_depth--;
-			mc->mc_db->md_branch_pages--;
-			mc->mc_ki[0] = mc->mc_ki[1];
-			for (i = 1; i<mc->mc_db->md_depth; i++) {
-				mc->mc_pg[i] = mc->mc_pg[i+1];
-				mc->mc_ki[i] = mc->mc_ki[i+1];
-			}
-			{
-				/* Adjust other cursors pointing to mp */
-				MDB_cursor *m2, *m3;
-				MDB_dbi dbi = mc->mc_dbi;
-
-				for (m2 = mc->mc_txn->mt_cursors[dbi]; m2; m2=m2->mc_next) {
-					if (mc->mc_flags & C_SUB)
-						m3 = &m2->mc_xcursor->mx_cursor;
-					else
-						m3 = m2;
-					if (m3 == mc) continue;
-					if (!(m3->mc_flags & C_INITIALIZED))
-						continue;
-					if (m3->mc_pg[0] == mp) {
-						for (i=0; i<mc->mc_db->md_depth; i++) {
-							m3->mc_pg[i] = m3->mc_pg[i+1];
-							m3->mc_ki[i] = m3->mc_ki[i+1];
-						}
-						m3->mc_snum--;
-						m3->mc_top--;
-					}
-				}
-			}
-		} else
-			DPUTS("root page doesn't need rebalancing");
-		return MDB_SUCCESS;
-	}
-
-	/* The parent (branch page) must have at least 2 pointers,
-	 * otherwise the tree is invalid.
-	 */
-	ptop = mc->mc_top-1;
-	mdb_cassert(mc, NUMKEYS(mc->mc_pg[ptop]) > 1);
-
-	/* Leaf page fill factor is below the threshold.
-	 * Try to move keys from left or right neighbor, or
-	 * merge with a neighbor page.
-	 */
-
-	/* Find neighbors.
-	 */
-	mdb_cursor_copy(mc, &mn);
-	mn.mc_xcursor = NULL;
-
-	oldki = mc->mc_ki[mc->mc_top];
-	if (mc->mc_ki[ptop] == 0) {
-		/* We're the leftmost leaf in our parent.
-		 */
-		DPUTS("reading right neighbor");
-		mn.mc_ki[ptop]++;
-		node = NODEPTR(mc->mc_pg[ptop], mn.mc_ki[ptop]);
-		rc = mdb_page_get(mc, NODEPGNO(node), &mn.mc_pg[mn.mc_top], NULL);
-		if (rc)
-			return rc;
-		mn.mc_ki[mn.mc_top] = 0;
-		mc->mc_ki[mc->mc_top] = NUMKEYS(mc->mc_pg[mc->mc_top]);
-		fromleft = 0;
-	} else {
-		/* There is at least one neighbor to the left.
-		 */
-		DPUTS("reading left neighbor");
-		mn.mc_ki[ptop]--;
-		node = NODEPTR(mc->mc_pg[ptop], mn.mc_ki[ptop]);
-		rc = mdb_page_get(mc, NODEPGNO(node), &mn.mc_pg[mn.mc_top], NULL);
-		if (rc)
-			return rc;
-		mn.mc_ki[mn.mc_top] = NUMKEYS(mn.mc_pg[mn.mc_top]) - 1;
-		mc->mc_ki[mc->mc_top] = 0;
-		fromleft = 1;
-	}
-
-	DPRINTF(("found neighbor page %"Z"u (%u keys, %.1f%% full)",
-	    mn.mc_pg[mn.mc_top]->mp_pgno, NUMKEYS(mn.mc_pg[mn.mc_top]),
-		(float)PAGEFILL(mc->mc_txn->mt_env, mn.mc_pg[mn.mc_top]) / 10));
-
-	/* If the neighbor page is above threshold and has enough keys,
-	 * move one key from it. Otherwise we should try to merge them.
-	 * (A branch page must never have less than 2 keys.)
-	 */
-	if (PAGEFILL(mc->mc_txn->mt_env, mn.mc_pg[mn.mc_top]) >= thresh && NUMKEYS(mn.mc_pg[mn.mc_top]) > minkeys) {
-		rc = mdb_node_move(&mn, mc, fromleft);
-		if (fromleft) {
-			/* if we inserted on left, bump position up */
-			oldki++;
-		}
-	} else {
-		if (!fromleft) {
-			rc = mdb_page_merge(&mn, mc);
-		} else {
-			oldki += NUMKEYS(mn.mc_pg[mn.mc_top]);
-			mn.mc_ki[mn.mc_top] += mc->mc_ki[mn.mc_top] + 1;
-			/* We want mdb_rebalance to find mn when doing fixups */
-			WITH_CURSOR_TRACKING(mn,
-				rc = mdb_page_merge(mc, &mn));
-			mdb_cursor_copy(&mn, mc);
-		}
-		mc->mc_flags &= ~C_EOF;
-	}
-	mc->mc_ki[mc->mc_top] = oldki;
-	return rc;
-}
-
-/** Complete a delete operation started by #mdb_cursor_del(). */
-static int
-mdb_cursor_del0(MDB_cursor *mc)
-{
-	int rc;
-	MDB_page *mp;
-	indx_t ki;
-	unsigned int nkeys;
-	MDB_cursor *m2, *m3;
-	MDB_dbi dbi = mc->mc_dbi;
-
-	ki = mc->mc_ki[mc->mc_top];
-	mp = mc->mc_pg[mc->mc_top];
-	mdb_node_del(mc, mc->mc_db->md_pad);
-	mc->mc_db->md_entries--;
-	{
-		/* Adjust other cursors pointing to mp */
-		for (m2 = mc->mc_txn->mt_cursors[dbi]; m2; m2=m2->mc_next) {
-			m3 = (mc->mc_flags & C_SUB) ? &m2->mc_xcursor->mx_cursor : m2;
-			if (! (m2->mc_flags & m3->mc_flags & C_INITIALIZED))
-				continue;
-			if (m3 == mc || m3->mc_snum < mc->mc_snum)
-				continue;
-			if (m3->mc_pg[mc->mc_top] == mp) {
-				if (m3->mc_ki[mc->mc_top] == ki) {
-					m3->mc_flags |= C_DEL;
-					if (mc->mc_db->md_flags & MDB_DUPSORT) {
-						/* Sub-cursor referred into dataset which is gone */
-						m3->mc_xcursor->mx_cursor.mc_flags &= ~(C_INITIALIZED|C_EOF);
-					}
-					continue;
-				} else if (m3->mc_ki[mc->mc_top] > ki) {
-					m3->mc_ki[mc->mc_top]--;
-				}
-				XCURSOR_REFRESH(m3, mc->mc_top, mp);
-			}
-		}
-	}
-	rc = mdb_rebalance(mc);
-
-	if (rc == MDB_SUCCESS) {
-		/* DB is totally empty now, just bail out.
-		 * Other cursors adjustments were already done
-		 * by mdb_rebalance and aren't needed here.
-		 */
-		if (!mc->mc_snum)
-			return rc;
-
-		mp = mc->mc_pg[mc->mc_top];
-		nkeys = NUMKEYS(mp);
-
-		/* Adjust other cursors pointing to mp */
-		for (m2 = mc->mc_txn->mt_cursors[dbi]; !rc && m2; m2=m2->mc_next) {
-			m3 = (mc->mc_flags & C_SUB) ? &m2->mc_xcursor->mx_cursor : m2;
-			if (! (m2->mc_flags & m3->mc_flags & C_INITIALIZED))
-				continue;
-			if (m3->mc_snum < mc->mc_snum)
-				continue;
-			if (m3->mc_pg[mc->mc_top] == mp) {
-				/* if m3 points past last node in page, find next sibling */
-				if (m3->mc_ki[mc->mc_top] >= mc->mc_ki[mc->mc_top]) {
-					if (m3->mc_ki[mc->mc_top] >= nkeys) {
-						rc = mdb_cursor_sibling(m3, 1);
-						if (rc == MDB_NOTFOUND) {
-							m3->mc_flags |= C_EOF;
-							rc = MDB_SUCCESS;
-							continue;
-						}
-					}
-					if (mc->mc_db->md_flags & MDB_DUPSORT) {
-						MDB_node *node = NODEPTR(m3->mc_pg[m3->mc_top], m3->mc_ki[m3->mc_top]);
-						/* If this node has dupdata, it may need to be reinited
-						 * because its data has moved.
-						 * If the xcursor was not initd it must be reinited.
-						 * Else if node points to a subDB, nothing is needed.
-						 * Else (xcursor was initd, not a subDB) needs mc_pg[0] reset.
-						 */
-						if (node->mn_flags & F_DUPDATA) {
-							if (m3->mc_xcursor->mx_cursor.mc_flags & C_INITIALIZED) {
-								if (!(node->mn_flags & F_SUBDATA))
-									m3->mc_xcursor->mx_cursor.mc_pg[0] = NODEDATA(node);
-							} else {
-								mdb_xcursor_init1(m3, node);
-								m3->mc_xcursor->mx_cursor.mc_flags |= C_DEL;
-							}
-						}
-					}
-				}
-			}
-		}
-		mc->mc_flags |= C_DEL;
-	}
-
-	if (rc)
-		mc->mc_txn->mt_flags |= MDB_TXN_ERROR;
-	return rc;
-}
-
-int
-mdb_del(MDB_txn *txn, MDB_dbi dbi,
-    MDB_val *key, MDB_val *data)
-{
-	if (!key || !TXN_DBI_EXIST(txn, dbi, DB_USRVALID))
-		return EINVAL;
-
-	if (txn->mt_flags & (MDB_TXN_RDONLY|MDB_TXN_BLOCKED))
-		return (txn->mt_flags & MDB_TXN_RDONLY) ? EACCES : MDB_BAD_TXN;
-
-	if (!F_ISSET(txn->mt_dbs[dbi].md_flags, MDB_DUPSORT)) {
-		/* must ignore any data */
-		data = NULL;
-	}
-
-	return mdb_del0(txn, dbi, key, data, 0);
-}
-
-static int
-mdb_del0(MDB_txn *txn, MDB_dbi dbi,
-	MDB_val *key, MDB_val *data, unsigned flags)
-{
-	MDB_cursor mc;
-	MDB_xcursor mx;
-	MDB_cursor_op op;
-	MDB_val rdata, *xdata;
-	int		 rc, exact = 0;
-	DKBUF;
-
-	DPRINTF(("====> delete db %u key [%s]", dbi, DKEY(key)));
-
-	mdb_cursor_init(&mc, txn, dbi, &mx);
-
-	if (data) {
-		op = MDB_GET_BOTH;
-		rdata = *data;
-		xdata = &rdata;
-	} else {
-		op = MDB_SET;
-		xdata = NULL;
-		flags |= MDB_NODUPDATA;
-	}
-	rc = mdb_cursor_set(&mc, key, xdata, op, &exact);
-	if (rc == 0) {
-		/* let mdb_page_split know about this cursor if needed:
-		 * delete will trigger a rebalance; if it needs to move
-		 * a node from one page to another, it will have to
-		 * update the parent's separator key(s). If the new sepkey
-		 * is larger than the current one, the parent page may
-		 * run out of space, triggering a split. We need this
-		 * cursor to be consistent until the end of the rebalance.
-		 */
-		mc.mc_flags |= C_UNTRACK;
-		mc.mc_next = txn->mt_cursors[dbi];
-		txn->mt_cursors[dbi] = &mc;
-		rc = mdb_cursor_del(&mc, flags);
-		txn->mt_cursors[dbi] = mc.mc_next;
-	}
-	return rc;
-}
-
-/** Split a page and insert a new node.
- * Set #MDB_TXN_ERROR on failure.
- * @param[in,out] mc Cursor pointing to the page and desired insertion index.
- * The cursor will be updated to point to the actual page and index where
- * the node got inserted after the split.
- * @param[in] newkey The key for the newly inserted node.
- * @param[in] newdata The data for the newly inserted node.
- * @param[in] newpgno The page number, if the new node is a branch node.
- * @param[in] nflags The #NODE_ADD_FLAGS for the new node.
- * @return 0 on success, non-zero on failure.
- */
-static int
-mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno,
-	unsigned int nflags)
-{
-	unsigned int flags;
-	int		 rc = MDB_SUCCESS, new_root = 0, did_split = 0;
-	indx_t		 newindx;
-	pgno_t		 pgno = 0;
-	int	 i, j, split_indx, nkeys, pmax;
-	MDB_env 	*env = mc->mc_txn->mt_env;
-	MDB_node	*node;
-	MDB_val	 sepkey, rkey, xdata, *rdata = &xdata;
-	MDB_page	*copy = NULL;
-	MDB_page	*mp, *rp, *pp;
-	int ptop;
-	MDB_cursor	mn;
-	DKBUF;
-
-	mp = mc->mc_pg[mc->mc_top];
-	newindx = mc->mc_ki[mc->mc_top];
-	nkeys = NUMKEYS(mp);
-
-	DPRINTF(("-----> splitting %s page %"Z"u and adding [%s] at index %i/%i",
-	    IS_LEAF(mp) ? "leaf" : "branch", mp->mp_pgno,
-	    DKEY(newkey), mc->mc_ki[mc->mc_top], nkeys));
-
-	/* Create a right sibling. */
-	if ((rc = mdb_page_new(mc, mp->mp_flags, 1, &rp)))
-		return rc;
-	rp->mp_pad = mp->mp_pad;
-	DPRINTF(("new right sibling: page %"Z"u", rp->mp_pgno));
-
-	/* Usually when splitting the root page, the cursor
-	 * height is 1. But when called from mdb_update_key,
-	 * the cursor height may be greater because it walks
-	 * up the stack while finding the branch slot to update.
-	 */
-	if (mc->mc_top < 1) {
-		if ((rc = mdb_page_new(mc, P_BRANCH, 1, &pp)))
-			goto done;
-		/* shift current top to make room for new parent */
-		for (i=mc->mc_snum; i>0; i--) {
-			mc->mc_pg[i] = mc->mc_pg[i-1];
-			mc->mc_ki[i] = mc->mc_ki[i-1];
-		}
-		mc->mc_pg[0] = pp;
-		mc->mc_ki[0] = 0;
-		mc->mc_db->md_root = pp->mp_pgno;
-		DPRINTF(("root split! new root = %"Z"u", pp->mp_pgno));
-		new_root = mc->mc_db->md_depth++;
-
-		/* Add left (implicit) pointer. */
-		if ((rc = mdb_node_add(mc, 0, NULL, NULL, mp->mp_pgno, 0)) != MDB_SUCCESS) {
-			/* undo the pre-push */
-			mc->mc_pg[0] = mc->mc_pg[1];
-			mc->mc_ki[0] = mc->mc_ki[1];
-			mc->mc_db->md_root = mp->mp_pgno;
-			mc->mc_db->md_depth--;
-			goto done;
-		}
-		mc->mc_snum++;
-		mc->mc_top++;
-		ptop = 0;
-	} else {
-		ptop = mc->mc_top-1;
-		DPRINTF(("parent branch page is %"Z"u", mc->mc_pg[ptop]->mp_pgno));
-	}
-
-	mdb_cursor_copy(mc, &mn);
-	mn.mc_xcursor = NULL;
-	mn.mc_pg[mn.mc_top] = rp;
-	mn.mc_ki[ptop] = mc->mc_ki[ptop]+1;
-
-	if (nflags & MDB_APPEND) {
-		mn.mc_ki[mn.mc_top] = 0;
-		sepkey = *newkey;
-		split_indx = newindx;
-		nkeys = 0;
-	} else {
-
-		split_indx = (nkeys+1) / 2;
-
-		if (IS_LEAF2(rp)) {
-			char *split, *ins;
-			int x;
-			unsigned int lsize, rsize, ksize;
-			/* Move half of the keys to the right sibling */
-			x = mc->mc_ki[mc->mc_top] - split_indx;
-			ksize = mc->mc_db->md_pad;
-			split = LEAF2KEY(mp, split_indx, ksize);
-			rsize = (nkeys - split_indx) * ksize;
-			lsize = (nkeys - split_indx) * sizeof(indx_t);
-			mp->mp_lower -= lsize;
-			rp->mp_lower += lsize;
-			mp->mp_upper += rsize - lsize;
-			rp->mp_upper -= rsize - lsize;
-			sepkey.mv_size = ksize;
-			if (newindx == split_indx) {
-				sepkey.mv_data = newkey->mv_data;
-			} else {
-				sepkey.mv_data = split;
-			}
-			if (x<0) {
-				ins = LEAF2KEY(mp, mc->mc_ki[mc->mc_top], ksize);
-				memcpy(rp->mp_ptrs, split, rsize);
-				sepkey.mv_data = rp->mp_ptrs;
-				memmove(ins+ksize, ins, (split_indx - mc->mc_ki[mc->mc_top]) * ksize);
-				memcpy(ins, newkey->mv_data, ksize);
-				mp->mp_lower += sizeof(indx_t);
-				mp->mp_upper -= ksize - sizeof(indx_t);
-			} else {
-				if (x)
-					memcpy(rp->mp_ptrs, split, x * ksize);
-				ins = LEAF2KEY(rp, x, ksize);
-				memcpy(ins, newkey->mv_data, ksize);
-				memcpy(ins+ksize, split + x * ksize, rsize - x * ksize);
-				rp->mp_lower += sizeof(indx_t);
-				rp->mp_upper -= ksize - sizeof(indx_t);
-				mc->mc_ki[mc->mc_top] = x;
-			}
-		} else {
-			int psize, nsize, k;
-			/* Maximum free space in an empty page */
-			pmax = env->me_psize - PAGEHDRSZ;
-			if (IS_LEAF(mp))
-				nsize = mdb_leaf_size(env, newkey, newdata);
-			else
-				nsize = mdb_branch_size(env, newkey);
-			nsize = EVEN(nsize);
-
-			/* grab a page to hold a temporary copy */
-			copy = mdb_page_malloc(mc->mc_txn, 1);
-			if (copy == NULL) {
-				rc = ENOMEM;
-				goto done;
-			}
-			copy->mp_pgno  = mp->mp_pgno;
-			copy->mp_flags = mp->mp_flags;
-			copy->mp_lower = (PAGEHDRSZ-PAGEBASE);
-			copy->mp_upper = env->me_psize - PAGEBASE;
-
-			/* prepare to insert */
-			for (i=0, j=0; i<nkeys; i++) {
-				if (i == newindx) {
-					copy->mp_ptrs[j++] = 0;
-				}
-				copy->mp_ptrs[j++] = mp->mp_ptrs[i];
-			}
-
-			/* When items are relatively large the split point needs
-			 * to be checked, because being off-by-one will make the
-			 * difference between success or failure in mdb_node_add.
-			 *
-			 * It's also relevant if a page happens to be laid out
-			 * such that one half of its nodes are all "small" and
-			 * the other half of its nodes are "large." If the new
-			 * item is also "large" and falls on the half with
-			 * "large" nodes, it also may not fit.
-			 *
-			 * As a final tweak, if the new item goes on the last
-			 * spot on the page (and thus, onto the new page), bias
-			 * the split so the new page is emptier than the old page.
-			 * This yields better packing during sequential inserts.
-			 */
-			if (nkeys < 20 || nsize > pmax/16 || newindx >= nkeys) {
-				/* Find split point */
-				psize = 0;
-				if (newindx <= split_indx || newindx >= nkeys) {
-					i = 0; j = 1;
-					k = newindx >= nkeys ? nkeys : split_indx+1+IS_LEAF(mp);
-				} else {
-					i = nkeys; j = -1;
-					k = split_indx-1;
-				}
-				for (; i!=k; i+=j) {
-					if (i == newindx) {
-						psize += nsize;
-						node = NULL;
-					} else {
-						node = (MDB_node *)((char *)mp + copy->mp_ptrs[i] + PAGEBASE);
-						psize += NODESIZE + NODEKSZ(node) + sizeof(indx_t);
-						if (IS_LEAF(mp)) {
-							if (F_ISSET(node->mn_flags, F_BIGDATA))
-								psize += sizeof(pgno_t);
-							else
-								psize += NODEDSZ(node);
-						}
-						psize = EVEN(psize);
-					}
-					if (psize > pmax || i == k-j) {
-						split_indx = i + (j<0);
-						break;
-					}
-				}
-			}
-			if (split_indx == newindx) {
-				sepkey.mv_size = newkey->mv_size;
-				sepkey.mv_data = newkey->mv_data;
-			} else {
-				node = (MDB_node *)((char *)mp + copy->mp_ptrs[split_indx] + PAGEBASE);
-				sepkey.mv_size = node->mn_ksize;
-				sepkey.mv_data = NODEKEY(node);
-			}
-		}
-	}
-
-	DPRINTF(("separator is %d [%s]", split_indx, DKEY(&sepkey)));
-
-	/* Copy separator key to the parent.
-	 */
-	if (SIZELEFT(mn.mc_pg[ptop]) < mdb_branch_size(env, &sepkey)) {
-		int snum = mc->mc_snum;
-		mn.mc_snum--;
-		mn.mc_top--;
-		did_split = 1;
-		/* We want other splits to find mn when doing fixups */
-		WITH_CURSOR_TRACKING(mn,
-			rc = mdb_page_split(&mn, &sepkey, NULL, rp->mp_pgno, 0));
-		if (rc)
-			goto done;
-
-		/* root split? */
-		if (mc->mc_snum > snum) {
-			ptop++;
-		}
-		/* Right page might now have changed parent.
-		 * Check if left page also changed parent.
-		 */
-		if (mn.mc_pg[ptop] != mc->mc_pg[ptop] &&
-		    mc->mc_ki[ptop] >= NUMKEYS(mc->mc_pg[ptop])) {
-			for (i=0; i<ptop; i++) {
-				mc->mc_pg[i] = mn.mc_pg[i];
-				mc->mc_ki[i] = mn.mc_ki[i];
-			}
-			mc->mc_pg[ptop] = mn.mc_pg[ptop];
-			if (mn.mc_ki[ptop]) {
-				mc->mc_ki[ptop] = mn.mc_ki[ptop] - 1;
-			} else {
-				/* find right page's left sibling */
-				mc->mc_ki[ptop] = mn.mc_ki[ptop];
-				mdb_cursor_sibling(mc, 0);
-			}
-		}
-	} else {
-		mn.mc_top--;
-		rc = mdb_node_add(&mn, mn.mc_ki[ptop], &sepkey, NULL, rp->mp_pgno, 0);
-		mn.mc_top++;
-	}
-	if (rc != MDB_SUCCESS) {
-		goto done;
-	}
-	if (nflags & MDB_APPEND) {
-		mc->mc_pg[mc->mc_top] = rp;
-		mc->mc_ki[mc->mc_top] = 0;
-		rc = mdb_node_add(mc, 0, newkey, newdata, newpgno, nflags);
-		if (rc)
-			goto done;
-		for (i=0; i<mc->mc_top; i++)
-			mc->mc_ki[i] = mn.mc_ki[i];
-	} else if (!IS_LEAF2(mp)) {
-		/* Move nodes */
-		mc->mc_pg[mc->mc_top] = rp;
-		i = split_indx;
-		j = 0;
-		do {
-			if (i == newindx) {
-				rkey.mv_data = newkey->mv_data;
-				rkey.mv_size = newkey->mv_size;
-				if (IS_LEAF(mp)) {
-					rdata = newdata;
-				} else
-					pgno = newpgno;
-				flags = nflags;
-				/* Update index for the new key. */
-				mc->mc_ki[mc->mc_top] = j;
-			} else {
-				node = (MDB_node *)((char *)mp + copy->mp_ptrs[i] + PAGEBASE);
-				rkey.mv_data = NODEKEY(node);
-				rkey.mv_size = node->mn_ksize;
-				if (IS_LEAF(mp)) {
-					xdata.mv_data = NODEDATA(node);
-					xdata.mv_size = NODEDSZ(node);
-					rdata = &xdata;
-				} else
-					pgno = NODEPGNO(node);
-				flags = node->mn_flags;
-			}
-
-			if (!IS_LEAF(mp) && j == 0) {
-				/* First branch index doesn't need key data. */
-				rkey.mv_size = 0;
-			}
-
-			rc = mdb_node_add(mc, j, &rkey, rdata, pgno, flags);
-			if (rc)
-				goto done;
-			if (i == nkeys) {
-				i = 0;
-				j = 0;
-				mc->mc_pg[mc->mc_top] = copy;
-			} else {
-				i++;
-				j++;
-			}
-		} while (i != split_indx);
-
-		nkeys = NUMKEYS(copy);
-		for (i=0; i<nkeys; i++)
-			mp->mp_ptrs[i] = copy->mp_ptrs[i];
-		mp->mp_lower = copy->mp_lower;
-		mp->mp_upper = copy->mp_upper;
-		memcpy(NODEPTR(mp, nkeys-1), NODEPTR(copy, nkeys-1),
-			env->me_psize - copy->mp_upper - PAGEBASE);
-
-		/* reset back to original page */
-		if (newindx < split_indx) {
-			mc->mc_pg[mc->mc_top] = mp;
-		} else {
-			mc->mc_pg[mc->mc_top] = rp;
-			mc->mc_ki[ptop]++;
-			/* Make sure mc_ki is still valid.
-			 */
-			if (mn.mc_pg[ptop] != mc->mc_pg[ptop] &&
-				mc->mc_ki[ptop] >= NUMKEYS(mc->mc_pg[ptop])) {
-				for (i=0; i<=ptop; i++) {
-					mc->mc_pg[i] = mn.mc_pg[i];
-					mc->mc_ki[i] = mn.mc_ki[i];
-				}
-			}
-		}
-		if (nflags & MDB_RESERVE) {
-			node = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]);
-			if (!(node->mn_flags & F_BIGDATA))
-				newdata->mv_data = NODEDATA(node);
-		}
-	} else {
-		if (newindx >= split_indx) {
-			mc->mc_pg[mc->mc_top] = rp;
-			mc->mc_ki[ptop]++;
-			/* Make sure mc_ki is still valid.
-			 */
-			if (mn.mc_pg[ptop] != mc->mc_pg[ptop] &&
-				mc->mc_ki[ptop] >= NUMKEYS(mc->mc_pg[ptop])) {
-				for (i=0; i<=ptop; i++) {
-					mc->mc_pg[i] = mn.mc_pg[i];
-					mc->mc_ki[i] = mn.mc_ki[i];
-				}
-			}
-		}
-	}
-
-	{
-		/* Adjust other cursors pointing to mp */
-		MDB_cursor *m2, *m3;
-		MDB_dbi dbi = mc->mc_dbi;
-		nkeys = NUMKEYS(mp);
-
-		for (m2 = mc->mc_txn->mt_cursors[dbi]; m2; m2=m2->mc_next) {
-			if (mc->mc_flags & C_SUB)
-				m3 = &m2->mc_xcursor->mx_cursor;
-			else
-				m3 = m2;
-			if (m3 == mc)
-				continue;
-			if (!(m2->mc_flags & m3->mc_flags & C_INITIALIZED))
-				continue;
-			if (new_root) {
-				int k;
-				/* sub cursors may be on different DB */
-				if (m3->mc_pg[0] != mp)
-					continue;
-				/* root split */
-				for (k=new_root; k>=0; k--) {
-					m3->mc_ki[k+1] = m3->mc_ki[k];
-					m3->mc_pg[k+1] = m3->mc_pg[k];
-				}
-				if (m3->mc_ki[0] >= nkeys) {
-					m3->mc_ki[0] = 1;
-				} else {
-					m3->mc_ki[0] = 0;
-				}
-				m3->mc_pg[0] = mc->mc_pg[0];
-				m3->mc_snum++;
-				m3->mc_top++;
-			}
-			if (m3->mc_top >= mc->mc_top && m3->mc_pg[mc->mc_top] == mp) {
-				if (m3->mc_ki[mc->mc_top] >= newindx && !(nflags & MDB_SPLIT_REPLACE))
-					m3->mc_ki[mc->mc_top]++;
-				if (m3->mc_ki[mc->mc_top] >= nkeys) {
-					m3->mc_pg[mc->mc_top] = rp;
-					m3->mc_ki[mc->mc_top] -= nkeys;
-					for (i=0; i<mc->mc_top; i++) {
-						m3->mc_ki[i] = mn.mc_ki[i];
-						m3->mc_pg[i] = mn.mc_pg[i];
-					}
-				}
-			} else if (!did_split && m3->mc_top >= ptop && m3->mc_pg[ptop] == mc->mc_pg[ptop] &&
-				m3->mc_ki[ptop] >= mc->mc_ki[ptop]) {
-				m3->mc_ki[ptop]++;
-			}
-			if (IS_LEAF(mp))
-				XCURSOR_REFRESH(m3, mc->mc_top, m3->mc_pg[mc->mc_top]);
-		}
-	}
-	DPRINTF(("mp left: %d, rp left: %d", SIZELEFT(mp), SIZELEFT(rp)));
-
-done:
-	if (copy)					/* tmp page */
-		mdb_page_free(env, copy);
-	if (rc)
-		mc->mc_txn->mt_flags |= MDB_TXN_ERROR;
-	return rc;
-}
-
-int
-mdb_put(MDB_txn *txn, MDB_dbi dbi,
-    MDB_val *key, MDB_val *data, unsigned int flags)
-{
-	MDB_cursor mc;
-	MDB_xcursor mx;
-	int rc;
-
-	if (!key || !data || !TXN_DBI_EXIST(txn, dbi, DB_USRVALID))
-		return EINVAL;
-
-	if (flags & ~(MDB_NOOVERWRITE|MDB_NODUPDATA|MDB_RESERVE|MDB_APPEND|MDB_APPENDDUP))
-		return EINVAL;
-
-	if (txn->mt_flags & (MDB_TXN_RDONLY|MDB_TXN_BLOCKED))
-		return (txn->mt_flags & MDB_TXN_RDONLY) ? EACCES : MDB_BAD_TXN;
-
-	mdb_cursor_init(&mc, txn, dbi, &mx);
-	mc.mc_next = txn->mt_cursors[dbi];
-	txn->mt_cursors[dbi] = &mc;
-	rc = mdb_cursor_put(&mc, key, data, flags);
-	txn->mt_cursors[dbi] = mc.mc_next;
-	return rc;
-}
-
-#ifndef MDB_WBUF
-#define MDB_WBUF	(1024*1024)
-#endif
-#define MDB_EOF		0x10	/**< #mdb_env_copyfd1() is done reading */
-
-	/** State needed for a double-buffering compacting copy. */
-typedef struct mdb_copy {
-	MDB_env *mc_env;
-	MDB_txn *mc_txn;
-	pthread_mutex_t mc_mutex;
-	pthread_cond_t mc_cond;	/**< Condition variable for #mc_new */
-	char *mc_wbuf[2];
-	char *mc_over[2];
-	int mc_wlen[2];
-	int mc_olen[2];
-	pgno_t mc_next_pgno;
-	HANDLE mc_fd;
-	int mc_toggle;			/**< Buffer number in provider */
-	int mc_new;				/**< (0-2 buffers to write) | (#MDB_EOF at end) */
-	/** Error code.  Never cleared if set.  Both threads can set nonzero
-	 *	to fail the copy.  Not mutex-protected, LMDB expects atomic int.
-	 */
-	volatile int mc_error;
-} mdb_copy;
-
-	/** Dedicated writer thread for compacting copy. */
-static THREAD_RET ESECT CALL_CONV
-mdb_env_copythr(void *arg)
-{
-	mdb_copy *my = arg;
-	char *ptr;
-	int toggle = 0, wsize, rc;
-#ifdef _WIN32
-	DWORD len;
-#define DO_WRITE(rc, fd, ptr, w2, len)	rc = WriteFile(fd, ptr, w2, &len, NULL)
-#else
-	int len;
-#define DO_WRITE(rc, fd, ptr, w2, len)	len = write(fd, ptr, w2); rc = (len >= 0)
-#ifdef SIGPIPE
-	sigset_t set;
-	sigemptyset(&set);
-	sigaddset(&set, SIGPIPE);
-	if ((rc = pthread_sigmask(SIG_BLOCK, &set, NULL)) != 0)
-		my->mc_error = rc;
-#endif
-#endif
-
-	pthread_mutex_lock(&my->mc_mutex);
-	for(;;) {
-		while (!my->mc_new)
-			pthread_cond_wait(&my->mc_cond, &my->mc_mutex);
-		if (my->mc_new == 0 + MDB_EOF) /* 0 buffers, just EOF */
-			break;
-		wsize = my->mc_wlen[toggle];
-		ptr = my->mc_wbuf[toggle];
-again:
-		rc = MDB_SUCCESS;
-		while (wsize > 0 && !my->mc_error) {
-			DO_WRITE(rc, my->mc_fd, ptr, wsize, len);
-			if (!rc) {
-				rc = ErrCode();
-#if defined(SIGPIPE) && !defined(_WIN32)
-				if (rc == EPIPE) {
-					/* Collect the pending SIGPIPE, otherwise at least OS X
-					 * gives it to the process on thread-exit (ITS#8504).
-					 */
-					int tmp;
-					sigwait(&set, &tmp);
-				}
-#endif
-				break;
-			} else if (len > 0) {
-				rc = MDB_SUCCESS;
-				ptr += len;
-				wsize -= len;
-				continue;
-			} else {
-				rc = EIO;
-				break;
-			}
-		}
-		if (rc) {
-			my->mc_error = rc;
-		}
-		/* If there's an overflow page tail, write it too */
-		if (my->mc_olen[toggle]) {
-			wsize = my->mc_olen[toggle];
-			ptr = my->mc_over[toggle];
-			my->mc_olen[toggle] = 0;
-			goto again;
-		}
-		my->mc_wlen[toggle] = 0;
-		toggle ^= 1;
-		/* Return the empty buffer to provider */
-		my->mc_new--;
-		pthread_cond_signal(&my->mc_cond);
-	}
-	pthread_mutex_unlock(&my->mc_mutex);
-	return (THREAD_RET)0;
-#undef DO_WRITE
-}
-
-	/** Give buffer and/or #MDB_EOF to writer thread, await unused buffer.
-	 *
-	 * @param[in] my control structure.
-	 * @param[in] adjust (1 to hand off 1 buffer) | (MDB_EOF when ending).
-	 */
-static int ESECT
-mdb_env_cthr_toggle(mdb_copy *my, int adjust)
-{
-	pthread_mutex_lock(&my->mc_mutex);
-	my->mc_new += adjust;
-	pthread_cond_signal(&my->mc_cond);
-	while (my->mc_new & 2)		/* both buffers in use */
-		pthread_cond_wait(&my->mc_cond, &my->mc_mutex);
-	pthread_mutex_unlock(&my->mc_mutex);
-
-	my->mc_toggle ^= (adjust & 1);
-	/* Both threads reset mc_wlen, to be safe from threading errors */
-	my->mc_wlen[my->mc_toggle] = 0;
-	return my->mc_error;
-}
-
-	/** Depth-first tree traversal for compacting copy.
-	 * @param[in] my control structure.
-	 * @param[in,out] pg database root.
-	 * @param[in] flags includes #F_DUPDATA if it is a sorted-duplicate sub-DB.
-	 */
-static int ESECT
-mdb_env_cwalk(mdb_copy *my, pgno_t *pg, int flags)
-{
-	MDB_cursor mc = {0};
-	MDB_node *ni;
-	MDB_page *mo, *mp, *leaf;
-	char *buf, *ptr;
-	int rc, toggle;
-	unsigned int i;
-
-	/* Empty DB, nothing to do */
-	if (*pg == P_INVALID)
-		return MDB_SUCCESS;
-
-	mc.mc_snum = 1;
-	mc.mc_txn = my->mc_txn;
-
-	rc = mdb_page_get(&mc, *pg, &mc.mc_pg[0], NULL);
-	if (rc)
-		return rc;
-	rc = mdb_page_search_root(&mc, NULL, MDB_PS_FIRST);
-	if (rc)
-		return rc;
-
-	/* Make cursor pages writable */
-	buf = ptr = malloc(my->mc_env->me_psize * mc.mc_snum);
-	if (buf == NULL)
-		return ENOMEM;
-
-	for (i=0; i<mc.mc_top; i++) {
-		mdb_page_copy((MDB_page *)ptr, mc.mc_pg[i], my->mc_env->me_psize);
-		mc.mc_pg[i] = (MDB_page *)ptr;
-		ptr += my->mc_env->me_psize;
-	}
-
-	/* This is writable space for a leaf page. Usually not needed. */
-	leaf = (MDB_page *)ptr;
-
-	toggle = my->mc_toggle;
-	while (mc.mc_snum > 0) {
-		unsigned n;
-		mp = mc.mc_pg[mc.mc_top];
-		n = NUMKEYS(mp);
-
-		if (IS_LEAF(mp)) {
-			if (!IS_LEAF2(mp) && !(flags & F_DUPDATA)) {
-				for (i=0; i<n; i++) {
-					ni = NODEPTR(mp, i);
-					if (ni->mn_flags & F_BIGDATA) {
-						MDB_page *omp;
-						pgno_t pg;
-
-						/* Need writable leaf */
-						if (mp != leaf) {
-							mc.mc_pg[mc.mc_top] = leaf;
-							mdb_page_copy(leaf, mp, my->mc_env->me_psize);
-							mp = leaf;
-							ni = NODEPTR(mp, i);
-						}
-
-						memcpy(&pg, NODEDATA(ni), sizeof(pg));
-						memcpy(NODEDATA(ni), &my->mc_next_pgno, sizeof(pgno_t));
-						rc = mdb_page_get(&mc, pg, &omp, NULL);
-						if (rc)
-							goto done;
-						if (my->mc_wlen[toggle] >= MDB_WBUF) {
-							rc = mdb_env_cthr_toggle(my, 1);
-							if (rc)
-								goto done;
-							toggle = my->mc_toggle;
-						}
-						mo = (MDB_page *)(my->mc_wbuf[toggle] + my->mc_wlen[toggle]);
-						memcpy(mo, omp, my->mc_env->me_psize);
-						mo->mp_pgno = my->mc_next_pgno;
-						my->mc_next_pgno += omp->mp_pages;
-						my->mc_wlen[toggle] += my->mc_env->me_psize;
-						if (omp->mp_pages > 1) {
-							my->mc_olen[toggle] = my->mc_env->me_psize * (omp->mp_pages - 1);
-							my->mc_over[toggle] = (char *)omp + my->mc_env->me_psize;
-							rc = mdb_env_cthr_toggle(my, 1);
-							if (rc)
-								goto done;
-							toggle = my->mc_toggle;
-						}
-					} else if (ni->mn_flags & F_SUBDATA) {
-						MDB_db db;
-
-						/* Need writable leaf */
-						if (mp != leaf) {
-							mc.mc_pg[mc.mc_top] = leaf;
-							mdb_page_copy(leaf, mp, my->mc_env->me_psize);
-							mp = leaf;
-							ni = NODEPTR(mp, i);
-						}
-
-						memcpy(&db, NODEDATA(ni), sizeof(db));
-						my->mc_toggle = toggle;
-						rc = mdb_env_cwalk(my, &db.md_root, ni->mn_flags & F_DUPDATA);
-						if (rc)
-							goto done;
-						toggle = my->mc_toggle;
-						memcpy(NODEDATA(ni), &db, sizeof(db));
-					}
-				}
-			}
-		} else {
-			mc.mc_ki[mc.mc_top]++;
-			if (mc.mc_ki[mc.mc_top] < n) {
-				pgno_t pg;
-again:
-				ni = NODEPTR(mp, mc.mc_ki[mc.mc_top]);
-				pg = NODEPGNO(ni);
-				rc = mdb_page_get(&mc, pg, &mp, NULL);
-				if (rc)
-					goto done;
-				mc.mc_top++;
-				mc.mc_snum++;
-				mc.mc_ki[mc.mc_top] = 0;
-				if (IS_BRANCH(mp)) {
-					/* Whenever we advance to a sibling branch page,
-					 * we must proceed all the way down to its first leaf.
-					 */
-					mdb_page_copy(mc.mc_pg[mc.mc_top], mp, my->mc_env->me_psize);
-					goto again;
-				} else
-					mc.mc_pg[mc.mc_top] = mp;
-				continue;
-			}
-		}
-		if (my->mc_wlen[toggle] >= MDB_WBUF) {
-			rc = mdb_env_cthr_toggle(my, 1);
-			if (rc)
-				goto done;
-			toggle = my->mc_toggle;
-		}
-		mo = (MDB_page *)(my->mc_wbuf[toggle] + my->mc_wlen[toggle]);
-		mdb_page_copy(mo, mp, my->mc_env->me_psize);
-		mo->mp_pgno = my->mc_next_pgno++;
-		my->mc_wlen[toggle] += my->mc_env->me_psize;
-		if (mc.mc_top) {
-			/* Update parent if there is one */
-			ni = NODEPTR(mc.mc_pg[mc.mc_top-1], mc.mc_ki[mc.mc_top-1]);
-			SETPGNO(ni, mo->mp_pgno);
-			mdb_cursor_pop(&mc);
-		} else {
-			/* Otherwise we're done */
-			*pg = mo->mp_pgno;
-			break;
-		}
-	}
-done:
-	free(buf);
-	return rc;
-}
-
-	/** Copy environment with compaction. */
-static int ESECT
-mdb_env_copyfd1(MDB_env *env, HANDLE fd)
-{
-	MDB_meta *mm;
-	MDB_page *mp;
-	mdb_copy my = {0};
-	MDB_txn *txn = NULL;
-	pthread_t thr;
-	pgno_t root, new_root;
-	int rc = MDB_SUCCESS;
-
-#ifdef _WIN32
-	if (!(my.mc_mutex = CreateMutex(NULL, FALSE, NULL)) ||
-		!(my.mc_cond = CreateEvent(NULL, FALSE, FALSE, NULL))) {
-		rc = ErrCode();
-		goto done;
-	}
-	my.mc_wbuf[0] = _aligned_malloc(MDB_WBUF*2, env->me_os_psize);
-	if (my.mc_wbuf[0] == NULL) {
-		/* _aligned_malloc() sets errno, but we use Windows error codes */
-		rc = ERROR_NOT_ENOUGH_MEMORY;
-		goto done;
-	}
-#else
-	if ((rc = pthread_mutex_init(&my.mc_mutex, NULL)) != 0)
-		return rc;
-	if ((rc = pthread_cond_init(&my.mc_cond, NULL)) != 0)
-		goto done2;
-#ifdef HAVE_MEMALIGN
-	my.mc_wbuf[0] = memalign(env->me_os_psize, MDB_WBUF*2);
-	if (my.mc_wbuf[0] == NULL) {
-		rc = errno;
-		goto done;
-	}
-#else
-	{
-		void *p;
-		if ((rc = posix_memalign(&p, env->me_os_psize, MDB_WBUF*2)) != 0)
-			goto done;
-		my.mc_wbuf[0] = p;
-	}
-#endif
-#endif
-	memset(my.mc_wbuf[0], 0, MDB_WBUF*2);
-	my.mc_wbuf[1] = my.mc_wbuf[0] + MDB_WBUF;
-	my.mc_next_pgno = NUM_METAS;
-	my.mc_env = env;
-	my.mc_fd = fd;
-	rc = THREAD_CREATE(thr, mdb_env_copythr, &my);
-	if (rc)
-		goto done;
-
-	rc = mdb_txn_begin(env, NULL, MDB_RDONLY, &txn);
-	if (rc)
-		goto finish;
-
-	mp = (MDB_page *)my.mc_wbuf[0];
-	memset(mp, 0, NUM_METAS * env->me_psize);
-	mp->mp_pgno = 0;
-	mp->mp_flags = P_META;
-	mm = (MDB_meta *)METADATA(mp);
-	mdb_env_init_meta0(env, mm);
-	mm->mm_address = env->me_metas[0]->mm_address;
-
-	mp = (MDB_page *)(my.mc_wbuf[0] + env->me_psize);
-	mp->mp_pgno = 1;
-	mp->mp_flags = P_META;
-	*(MDB_meta *)METADATA(mp) = *mm;
-	mm = (MDB_meta *)METADATA(mp);
-
-	/* Set metapage 1 with current main DB */
-	root = new_root = txn->mt_dbs[MAIN_DBI].md_root;
-	if (root != P_INVALID) {
-		/* Count free pages + freeDB pages.  Subtract from last_pg
-		 * to find the new last_pg, which also becomes the new root.
-		 */
-		MDB_ID freecount = 0;
-		MDB_cursor mc;
-		MDB_val key, data;
-		mdb_cursor_init(&mc, txn, FREE_DBI, NULL);
-		while ((rc = mdb_cursor_get(&mc, &key, &data, MDB_NEXT)) == 0)
-			freecount += *(MDB_ID *)data.mv_data;
-		if (rc != MDB_NOTFOUND)
-			goto finish;
-		freecount += txn->mt_dbs[FREE_DBI].md_branch_pages +
-			txn->mt_dbs[FREE_DBI].md_leaf_pages +
-			txn->mt_dbs[FREE_DBI].md_overflow_pages;
-
-		new_root = txn->mt_next_pgno - 1 - freecount;
-		mm->mm_last_pg = new_root;
-		mm->mm_dbs[MAIN_DBI] = txn->mt_dbs[MAIN_DBI];
-		mm->mm_dbs[MAIN_DBI].md_root = new_root;
-	} else {
-		/* When the DB is empty, handle it specially to
-		 * fix any breakage like page leaks from ITS#8174.
-		 */
-		mm->mm_dbs[MAIN_DBI].md_flags = txn->mt_dbs[MAIN_DBI].md_flags;
-	}
-	if (root != P_INVALID || mm->mm_dbs[MAIN_DBI].md_flags) {
-		mm->mm_txnid = 1;		/* use metapage 1 */
-	}
-
-	my.mc_wlen[0] = env->me_psize * NUM_METAS;
-	my.mc_txn = txn;
-	rc = mdb_env_cwalk(&my, &root, 0);
-	if (rc == MDB_SUCCESS && root != new_root) {
-		rc = MDB_INCOMPATIBLE;	/* page leak or corrupt DB */
-	}
-
-finish:
-	if (rc)
-		my.mc_error = rc;
-	mdb_env_cthr_toggle(&my, 1 | MDB_EOF);
-	rc = THREAD_FINISH(thr);
-	mdb_txn_abort(txn);
-
-done:
-#ifdef _WIN32
-	if (my.mc_wbuf[0]) _aligned_free(my.mc_wbuf[0]);
-	if (my.mc_cond)  CloseHandle(my.mc_cond);
-	if (my.mc_mutex) CloseHandle(my.mc_mutex);
-#else
-	free(my.mc_wbuf[0]);
-	pthread_cond_destroy(&my.mc_cond);
-done2:
-	pthread_mutex_destroy(&my.mc_mutex);
-#endif
-	return rc ? rc : my.mc_error;
-}
-
-	/** Copy environment as-is. */
-static int ESECT
-mdb_env_copyfd0(MDB_env *env, HANDLE fd)
-{
-	MDB_txn *txn = NULL;
-	mdb_mutexref_t wmutex = NULL;
-	int rc;
-	size_t wsize, w3;
-	char *ptr;
-#ifdef _WIN32
-	DWORD len, w2;
-#define DO_WRITE(rc, fd, ptr, w2, len)	rc = WriteFile(fd, ptr, w2, &len, NULL)
-#else
-	ssize_t len;
-	size_t w2;
-#define DO_WRITE(rc, fd, ptr, w2, len)	len = write(fd, ptr, w2); rc = (len >= 0)
-#endif
-
-	/* Do the lock/unlock of the reader mutex before starting the
-	 * write txn.  Otherwise other read txns could block writers.
-	 */
-	rc = mdb_txn_begin(env, NULL, MDB_RDONLY, &txn);
-	if (rc)
-		return rc;
-
-	if (env->me_txns) {
-		/* We must start the actual read txn after blocking writers */
-		mdb_txn_end(txn, MDB_END_RESET_TMP);
-
-		/* Temporarily block writers until we snapshot the meta pages */
-		wmutex = env->me_wmutex;
-		if (LOCK_MUTEX(rc, env, wmutex))
-			goto leave;
-
-		rc = mdb_txn_renew0(txn);
-		if (rc) {
-			UNLOCK_MUTEX(wmutex);
-			goto leave;
-		}
-	}
-
-	wsize = env->me_psize * NUM_METAS;
-	ptr = env->me_map;
-	w2 = wsize;
-	while (w2 > 0) {
-		DO_WRITE(rc, fd, ptr, w2, len);
-		if (!rc) {
-			rc = ErrCode();
-			break;
-		} else if (len > 0) {
-			rc = MDB_SUCCESS;
-			ptr += len;
-			w2 -= len;
-			continue;
-		} else {
-			/* Non-blocking or async handles are not supported */
-			rc = EIO;
-			break;
-		}
-	}
-	if (wmutex)
-		UNLOCK_MUTEX(wmutex);
-
-	if (rc)
-		goto leave;
-
-	w3 = txn->mt_next_pgno * env->me_psize;
-	{
-		size_t fsize = 0;
-		if ((rc = mdb_fsize(env->me_fd, &fsize)))
-			goto leave;
-		if (w3 > fsize)
-			w3 = fsize;
-	}
-	wsize = w3 - wsize;
-	while (wsize > 0) {
-		if (wsize > MAX_WRITE)
-			w2 = MAX_WRITE;
-		else
-			w2 = wsize;
-		DO_WRITE(rc, fd, ptr, w2, len);
-		if (!rc) {
-			rc = ErrCode();
-			break;
-		} else if (len > 0) {
-			rc = MDB_SUCCESS;
-			ptr += len;
-			wsize -= len;
-			continue;
-		} else {
-			rc = EIO;
-			break;
-		}
-	}
-
-leave:
-	mdb_txn_abort(txn);
-	return rc;
-}
-
-int ESECT
-mdb_env_copyfd2(MDB_env *env, HANDLE fd, unsigned int flags)
-{
-	if (flags & MDB_CP_COMPACT)
-		return mdb_env_copyfd1(env, fd);
-	else
-		return mdb_env_copyfd0(env, fd);
-}
-
-int ESECT
-mdb_env_copyfd(MDB_env *env, HANDLE fd)
-{
-	return mdb_env_copyfd2(env, fd, 0);
-}
-
-int ESECT
-mdb_env_copy2(MDB_env *env, const char *path, unsigned int flags)
-{
-	int rc;
-	MDB_name fname;
-	HANDLE newfd = INVALID_HANDLE_VALUE;
-
-	rc = mdb_fname_init(path, env->me_flags | MDB_NOLOCK, &fname);
-	if (rc == MDB_SUCCESS) {
-		rc = mdb_fopen(env, &fname, MDB_O_COPY, 0666, &newfd);
-		mdb_fname_destroy(fname);
-	}
-	if (rc == MDB_SUCCESS) {
-		rc = mdb_env_copyfd2(env, newfd, flags);
-		if (close(newfd) < 0 && rc == MDB_SUCCESS)
-			rc = ErrCode();
-	}
-	return rc;
-}
-
-int ESECT
-mdb_env_copy(MDB_env *env, const char *path)
-{
-	return mdb_env_copy2(env, path, 0);
-}
-
-int ESECT
-mdb_env_set_flags(MDB_env *env, unsigned int flag, int onoff)
-{
-	if (flag & ~CHANGEABLE)
-		return EINVAL;
-	if (onoff)
-		env->me_flags |= flag;
-	else
-		env->me_flags &= ~flag;
-	return MDB_SUCCESS;
-}
-
-int ESECT
-mdb_env_get_flags(MDB_env *env, unsigned int *arg)
-{
-	if (!env || !arg)
-		return EINVAL;
-
-	*arg = env->me_flags & (CHANGEABLE|CHANGELESS);
-	return MDB_SUCCESS;
-}
-
-int ESECT
-mdb_env_set_userctx(MDB_env *env, void *ctx)
-{
-	if (!env)
-		return EINVAL;
-	env->me_userctx = ctx;
-	return MDB_SUCCESS;
-}
-
-void * ESECT
-mdb_env_get_userctx(MDB_env *env)
-{
-	return env ? env->me_userctx : NULL;
-}
-
-int ESECT
-mdb_env_set_assert(MDB_env *env, MDB_assert_func *func)
-{
-	if (!env)
-		return EINVAL;
-#ifndef NDEBUG
-	env->me_assert_func = func;
-#endif
-	return MDB_SUCCESS;
-}
-
-int ESECT
-mdb_env_get_path(MDB_env *env, const char **arg)
-{
-	if (!env || !arg)
-		return EINVAL;
-
-	*arg = env->me_path;
-	return MDB_SUCCESS;
-}
-
-int ESECT
-mdb_env_get_fd(MDB_env *env, mdb_filehandle_t *arg)
-{
-	if (!env || !arg)
-		return EINVAL;
-
-	*arg = env->me_fd;
-	return MDB_SUCCESS;
-}
-
-/** Common code for #mdb_stat() and #mdb_env_stat().
- * @param[in] env the environment to operate in.
- * @param[in] db the #MDB_db record containing the stats to return.
- * @param[out] arg the address of an #MDB_stat structure to receive the stats.
- * @return 0, this function always succeeds.
- */
-static int ESECT
-mdb_stat0(MDB_env *env, MDB_db *db, MDB_stat *arg)
-{
-	arg->ms_psize = env->me_psize;
-	arg->ms_depth = db->md_depth;
-	arg->ms_branch_pages = db->md_branch_pages;
-	arg->ms_leaf_pages = db->md_leaf_pages;
-	arg->ms_overflow_pages = db->md_overflow_pages;
-	arg->ms_entries = db->md_entries;
-
-	return MDB_SUCCESS;
-}
-
-int ESECT
-mdb_env_stat(MDB_env *env, MDB_stat *arg)
-{
-	MDB_meta *meta;
-
-	if (env == NULL || arg == NULL)
-		return EINVAL;
-
-	meta = mdb_env_pick_meta(env);
-
-	return mdb_stat0(env, &meta->mm_dbs[MAIN_DBI], arg);
-}
-
-int ESECT
-mdb_env_info(MDB_env *env, MDB_envinfo *arg)
-{
-	MDB_meta *meta;
-
-	if (env == NULL || arg == NULL)
-		return EINVAL;
-
-	meta = mdb_env_pick_meta(env);
-	arg->me_mapaddr = meta->mm_address;
-	arg->me_last_pgno = meta->mm_last_pg;
-	arg->me_last_txnid = meta->mm_txnid;
-
-	arg->me_mapsize = env->me_mapsize;
-	arg->me_maxreaders = env->me_maxreaders;
-	arg->me_numreaders = env->me_txns ? env->me_txns->mti_numreaders : 0;
-	return MDB_SUCCESS;
-}
-
-/** Set the default comparison functions for a database.
- * Called immediately after a database is opened to set the defaults.
- * The user can then override them with #mdb_set_compare() or
- * #mdb_set_dupsort().
- * @param[in] txn A transaction handle returned by #mdb_txn_begin()
- * @param[in] dbi A database handle returned by #mdb_dbi_open()
- */
-static void
-mdb_default_cmp(MDB_txn *txn, MDB_dbi dbi)
-{
-	uint16_t f = txn->mt_dbs[dbi].md_flags;
-
-	txn->mt_dbxs[dbi].md_cmp =
-		(f & MDB_REVERSEKEY) ? mdb_cmp_memnr :
-		(f & MDB_INTEGERKEY) ? mdb_cmp_cint  : mdb_cmp_memn;
-
-	txn->mt_dbxs[dbi].md_dcmp =
-		!(f & MDB_DUPSORT) ? 0 :
-		((f & MDB_INTEGERDUP)
-		 ? ((f & MDB_DUPFIXED)   ? mdb_cmp_int   : mdb_cmp_cint)
-		 : ((f & MDB_REVERSEDUP) ? mdb_cmp_memnr : mdb_cmp_memn));
-}
-
-int mdb_dbi_open(MDB_txn *txn, const char *name, unsigned int flags, MDB_dbi *dbi)
-{
-	MDB_val key, data;
-	MDB_dbi i;
-	MDB_cursor mc;
-	MDB_db dummy;
-	int rc, dbflag, exact;
-	unsigned int unused = 0, seq;
-	char *namedup;
-	size_t len;
-
-	if (flags & ~VALID_FLAGS)
-		return EINVAL;
-	if (txn->mt_flags & MDB_TXN_BLOCKED)
-		return MDB_BAD_TXN;
-
-	/* main DB? */
-	if (!name) {
-		*dbi = MAIN_DBI;
-		if (flags & PERSISTENT_FLAGS) {
-			uint16_t f2 = flags & PERSISTENT_FLAGS;
-			/* make sure flag changes get committed */
-			if ((txn->mt_dbs[MAIN_DBI].md_flags | f2) != txn->mt_dbs[MAIN_DBI].md_flags) {
-				txn->mt_dbs[MAIN_DBI].md_flags |= f2;
-				txn->mt_flags |= MDB_TXN_DIRTY;
-			}
-		}
-		mdb_default_cmp(txn, MAIN_DBI);
-		return MDB_SUCCESS;
-	}
-
-	if (txn->mt_dbxs[MAIN_DBI].md_cmp == NULL) {
-		mdb_default_cmp(txn, MAIN_DBI);
-	}
-
-	/* Is the DB already open? */
-	len = strlen(name);
-	for (i=CORE_DBS; i<txn->mt_numdbs; i++) {
-		if (!txn->mt_dbxs[i].md_name.mv_size) {
-			/* Remember this free slot */
-			if (!unused) unused = i;
-			continue;
-		}
-		if (len == txn->mt_dbxs[i].md_name.mv_size &&
-			!strncmp(name, txn->mt_dbxs[i].md_name.mv_data, len)) {
-			*dbi = i;
-			return MDB_SUCCESS;
-		}
-	}
-
-	/* If no free slot and max hit, fail */
-	if (!unused && txn->mt_numdbs >= txn->mt_env->me_maxdbs)
-		return MDB_DBS_FULL;
-
-	/* Cannot mix named databases with some mainDB flags */
-	if (txn->mt_dbs[MAIN_DBI].md_flags & (MDB_DUPSORT|MDB_INTEGERKEY))
-		return (flags & MDB_CREATE) ? MDB_INCOMPATIBLE : MDB_NOTFOUND;
-
-	/* Find the DB info */
-	dbflag = DB_NEW|DB_VALID|DB_USRVALID;
-	exact = 0;
-	key.mv_size = len;
-	key.mv_data = (void *)name;
-	mdb_cursor_init(&mc, txn, MAIN_DBI, NULL);
-	rc = mdb_cursor_set(&mc, &key, &data, MDB_SET, &exact);
-	if (rc == MDB_SUCCESS) {
-		/* make sure this is actually a DB */
-		MDB_node *node = NODEPTR(mc.mc_pg[mc.mc_top], mc.mc_ki[mc.mc_top]);
-		if ((node->mn_flags & (F_DUPDATA|F_SUBDATA)) != F_SUBDATA)
-			return MDB_INCOMPATIBLE;
-	} else {
-		if (rc != MDB_NOTFOUND || !(flags & MDB_CREATE))
-			return rc;
-		if (F_ISSET(txn->mt_flags, MDB_TXN_RDONLY))
-			return EACCES;
-	}
-
-	/* Done here so we cannot fail after creating a new DB */
-	if ((namedup = strdup(name)) == NULL)
-		return ENOMEM;
-
-	if (rc) {
-		/* MDB_NOTFOUND and MDB_CREATE: Create new DB */
-		data.mv_size = sizeof(MDB_db);
-		data.mv_data = &dummy;
-		memset(&dummy, 0, sizeof(dummy));
-		dummy.md_root = P_INVALID;
-		dummy.md_flags = flags & PERSISTENT_FLAGS;
-		WITH_CURSOR_TRACKING(mc,
-			rc = mdb_cursor_put(&mc, &key, &data, F_SUBDATA));
-		dbflag |= DB_DIRTY;
-	}
-
-	if (rc) {
-		free(namedup);
-	} else {
-		/* Got info, register DBI in this txn */
-		unsigned int slot = unused ? unused : txn->mt_numdbs;
-		txn->mt_dbxs[slot].md_name.mv_data = namedup;
-		txn->mt_dbxs[slot].md_name.mv_size = len;
-		txn->mt_dbxs[slot].md_rel = NULL;
-		txn->mt_dbflags[slot] = dbflag;
-		/* txn-> and env-> are the same in read txns, use
-		 * tmp variable to avoid undefined assignment
-		 */
-		seq = ++txn->mt_env->me_dbiseqs[slot];
-		txn->mt_dbiseqs[slot] = seq;
-
-		memcpy(&txn->mt_dbs[slot], data.mv_data, sizeof(MDB_db));
-		*dbi = slot;
-		mdb_default_cmp(txn, slot);
-		if (!unused) {
-			txn->mt_numdbs++;
-		}
-	}
-
-	return rc;
-}
-
-int ESECT
-mdb_stat(MDB_txn *txn, MDB_dbi dbi, MDB_stat *arg)
-{
-	if (!arg || !TXN_DBI_EXIST(txn, dbi, DB_VALID))
-		return EINVAL;
-
-	if (txn->mt_flags & MDB_TXN_BLOCKED)
-		return MDB_BAD_TXN;
-
-	if (txn->mt_dbflags[dbi] & DB_STALE) {
-		MDB_cursor mc;
-		MDB_xcursor mx;
-		/* Stale, must read the DB's root. cursor_init does it for us. */
-		mdb_cursor_init(&mc, txn, dbi, &mx);
-	}
-	return mdb_stat0(txn->mt_env, &txn->mt_dbs[dbi], arg);
-}
-
-void mdb_dbi_close(MDB_env *env, MDB_dbi dbi)
-{
-	char *ptr;
-	if (dbi < CORE_DBS || dbi >= env->me_maxdbs)
-		return;
-	ptr = env->me_dbxs[dbi].md_name.mv_data;
-	/* If there was no name, this was already closed */
-	if (ptr) {
-		env->me_dbxs[dbi].md_name.mv_data = NULL;
-		env->me_dbxs[dbi].md_name.mv_size = 0;
-		env->me_dbflags[dbi] = 0;
-		env->me_dbiseqs[dbi]++;
-		free(ptr);
-	}
-}
-
-int mdb_dbi_flags(MDB_txn *txn, MDB_dbi dbi, unsigned int *flags)
-{
-	/* We could return the flags for the FREE_DBI too but what's the point? */
-	if (!TXN_DBI_EXIST(txn, dbi, DB_USRVALID))
-		return EINVAL;
-	*flags = txn->mt_dbs[dbi].md_flags & PERSISTENT_FLAGS;
-	return MDB_SUCCESS;
-}
-
-/** Add all the DB's pages to the free list.
- * @param[in] mc Cursor on the DB to free.
- * @param[in] subs non-Zero to check for sub-DBs in this DB.
- * @return 0 on success, non-zero on failure.
- */
-static int
-mdb_drop0(MDB_cursor *mc, int subs)
-{
-	int rc;
-
-	rc = mdb_page_search(mc, NULL, MDB_PS_FIRST);
-	if (rc == MDB_SUCCESS) {
-		MDB_txn *txn = mc->mc_txn;
-		MDB_node *ni;
-		MDB_cursor mx;
-		unsigned int i;
-
-		/* DUPSORT sub-DBs have no ovpages/DBs. Omit scanning leaves.
-		 * This also avoids any P_LEAF2 pages, which have no nodes.
-		 * Also if the DB doesn't have sub-DBs and has no overflow
-		 * pages, omit scanning leaves.
-		 */
-		if ((mc->mc_flags & C_SUB) ||
-			(!subs && !mc->mc_db->md_overflow_pages))
-			mdb_cursor_pop(mc);
-
-		mdb_cursor_copy(mc, &mx);
-		while (mc->mc_snum > 0) {
-			MDB_page *mp = mc->mc_pg[mc->mc_top];
-			unsigned n = NUMKEYS(mp);
-			if (IS_LEAF(mp)) {
-				for (i=0; i<n; i++) {
-					ni = NODEPTR(mp, i);
-					if (ni->mn_flags & F_BIGDATA) {
-						MDB_page *omp;
-						pgno_t pg;
-						memcpy(&pg, NODEDATA(ni), sizeof(pg));
-						rc = mdb_page_get(mc, pg, &omp, NULL);
-						if (rc != 0)
-							goto done;
-						mdb_cassert(mc, IS_OVERFLOW(omp));
-						rc = mdb_midl_append_range(&txn->mt_free_pgs,
-							pg, omp->mp_pages);
-						if (rc)
-							goto done;
-						mc->mc_db->md_overflow_pages -= omp->mp_pages;
-						if (!mc->mc_db->md_overflow_pages && !subs)
-							break;
-					} else if (subs && (ni->mn_flags & F_SUBDATA)) {
-						mdb_xcursor_init1(mc, ni);
-						rc = mdb_drop0(&mc->mc_xcursor->mx_cursor, 0);
-						if (rc)
-							goto done;
-					}
-				}
-				if (!subs && !mc->mc_db->md_overflow_pages)
-					goto pop;
-			} else {
-				if ((rc = mdb_midl_need(&txn->mt_free_pgs, n)) != 0)
-					goto done;
-				for (i=0; i<n; i++) {
-					pgno_t pg;
-					ni = NODEPTR(mp, i);
-					pg = NODEPGNO(ni);
-					/* free it */
-					mdb_midl_xappend(txn->mt_free_pgs, pg);
-				}
-			}
-			if (!mc->mc_top)
-				break;
-			mc->mc_ki[mc->mc_top] = i;
-			rc = mdb_cursor_sibling(mc, 1);
-			if (rc) {
-				if (rc != MDB_NOTFOUND)
-					goto done;
-				/* no more siblings, go back to beginning
-				 * of previous level.
-				 */
-pop:
-				mdb_cursor_pop(mc);
-				mc->mc_ki[0] = 0;
-				for (i=1; i<mc->mc_snum; i++) {
-					mc->mc_ki[i] = 0;
-					mc->mc_pg[i] = mx.mc_pg[i];
-				}
-			}
-		}
-		/* free it */
-		rc = mdb_midl_append(&txn->mt_free_pgs, mc->mc_db->md_root);
-done:
-		if (rc)
-			txn->mt_flags |= MDB_TXN_ERROR;
-	} else if (rc == MDB_NOTFOUND) {
-		rc = MDB_SUCCESS;
-	}
-	mc->mc_flags &= ~C_INITIALIZED;
-	return rc;
-}
-
-int mdb_drop(MDB_txn *txn, MDB_dbi dbi, int del)
-{
-	MDB_cursor *mc, *m2;
-	int rc;
-
-	if ((unsigned)del > 1 || !TXN_DBI_EXIST(txn, dbi, DB_USRVALID))
-		return EINVAL;
-
-	if (F_ISSET(txn->mt_flags, MDB_TXN_RDONLY))
-		return EACCES;
-
-	if (TXN_DBI_CHANGED(txn, dbi))
-		return MDB_BAD_DBI;
-
-	rc = mdb_cursor_open(txn, dbi, &mc);
-	if (rc)
-		return rc;
-
-	rc = mdb_drop0(mc, mc->mc_db->md_flags & MDB_DUPSORT);
-	/* Invalidate the dropped DB's cursors */
-	for (m2 = txn->mt_cursors[dbi]; m2; m2 = m2->mc_next)
-		m2->mc_flags &= ~(C_INITIALIZED|C_EOF);
-	if (rc)
-		goto leave;
-
-	/* Can't delete the main DB */
-	if (del && dbi >= CORE_DBS) {
-		rc = mdb_del0(txn, MAIN_DBI, &mc->mc_dbx->md_name, NULL, F_SUBDATA);
-		if (!rc) {
-			txn->mt_dbflags[dbi] = DB_STALE;
-			mdb_dbi_close(txn->mt_env, dbi);
-		} else {
-			txn->mt_flags |= MDB_TXN_ERROR;
-		}
-	} else {
-		/* reset the DB record, mark it dirty */
-		txn->mt_dbflags[dbi] |= DB_DIRTY;
-		txn->mt_dbs[dbi].md_depth = 0;
-		txn->mt_dbs[dbi].md_branch_pages = 0;
-		txn->mt_dbs[dbi].md_leaf_pages = 0;
-		txn->mt_dbs[dbi].md_overflow_pages = 0;
-		txn->mt_dbs[dbi].md_entries = 0;
-		txn->mt_dbs[dbi].md_root = P_INVALID;
-
-		txn->mt_flags |= MDB_TXN_DIRTY;
-	}
-leave:
-	mdb_cursor_close(mc);
-	return rc;
-}
-
-int mdb_set_compare(MDB_txn *txn, MDB_dbi dbi, MDB_cmp_func *cmp)
-{
-	if (!TXN_DBI_EXIST(txn, dbi, DB_USRVALID))
-		return EINVAL;
-
-	txn->mt_dbxs[dbi].md_cmp = cmp;
-	return MDB_SUCCESS;
-}
-
-int mdb_set_dupsort(MDB_txn *txn, MDB_dbi dbi, MDB_cmp_func *cmp)
-{
-	if (!TXN_DBI_EXIST(txn, dbi, DB_USRVALID))
-		return EINVAL;
-
-	txn->mt_dbxs[dbi].md_dcmp = cmp;
-	return MDB_SUCCESS;
-}
-
-int mdb_set_relfunc(MDB_txn *txn, MDB_dbi dbi, MDB_rel_func *rel)
-{
-	if (!TXN_DBI_EXIST(txn, dbi, DB_USRVALID))
-		return EINVAL;
-
-	txn->mt_dbxs[dbi].md_rel = rel;
-	return MDB_SUCCESS;
-}
-
-int mdb_set_relctx(MDB_txn *txn, MDB_dbi dbi, void *ctx)
-{
-	if (!TXN_DBI_EXIST(txn, dbi, DB_USRVALID))
-		return EINVAL;
-
-	txn->mt_dbxs[dbi].md_relctx = ctx;
-	return MDB_SUCCESS;
-}
-
-int ESECT
-mdb_env_get_maxkeysize(MDB_env *env)
-{
-	return ENV_MAXKEY(env);
-}
-
-int ESECT
-mdb_reader_list(MDB_env *env, MDB_msg_func *func, void *ctx)
-{
-	unsigned int i, rdrs;
-	MDB_reader *mr;
-	char buf[64];
-	int rc = 0, first = 1;
-
-	if (!env || !func)
-		return -1;
-	if (!env->me_txns) {
-		return func("(no reader locks)\n", ctx);
-	}
-	rdrs = env->me_txns->mti_numreaders;
-	mr = env->me_txns->mti_readers;
-	for (i=0; i<rdrs; i++) {
-		if (mr[i].mr_pid) {
-			txnid_t	txnid = mr[i].mr_txnid;
-			sprintf(buf, txnid == (txnid_t)-1 ?
-				"%10d %"Z"x -\n" : "%10d %"Z"x %"Z"u\n",
-				(int)mr[i].mr_pid, (size_t)mr[i].mr_tid, txnid);
-			if (first) {
-				first = 0;
-				rc = func("    pid     thread     txnid\n", ctx);
-				if (rc < 0)
-					break;
-			}
-			rc = func(buf, ctx);
-			if (rc < 0)
-				break;
-		}
-	}
-	if (first) {
-		rc = func("(no active readers)\n", ctx);
-	}
-	return rc;
-}
-
-/** Insert pid into list if not already present.
- * return -1 if already present.
- */
-static int ESECT
-mdb_pid_insert(MDB_PID_T *ids, MDB_PID_T pid)
-{
-	/* binary search of pid in list */
-	unsigned base = 0;
-	unsigned cursor = 1;
-	int val = 0;
-	unsigned n = ids[0];
-
-	while( 0 < n ) {
-		unsigned pivot = n >> 1;
-		cursor = base + pivot + 1;
-		val = pid - ids[cursor];
-
-		if( val < 0 ) {
-			n = pivot;
-
-		} else if ( val > 0 ) {
-			base = cursor;
-			n -= pivot + 1;
-
-		} else {
-			/* found, so it's a duplicate */
-			return -1;
-		}
-	}
-
-	if( val > 0 ) {
-		++cursor;
-	}
-	ids[0]++;
-	for (n = ids[0]; n > cursor; n--)
-		ids[n] = ids[n-1];
-	ids[n] = pid;
-	return 0;
-}
-
-int ESECT
-mdb_reader_check(MDB_env *env, int *dead)
-{
-	if (!env)
-		return EINVAL;
-	if (dead)
-		*dead = 0;
-	return env->me_txns ? mdb_reader_check0(env, 0, dead) : MDB_SUCCESS;
-}
-
-/** As #mdb_reader_check(). \b rlocked is set if caller locked #me_rmutex. */
-static int ESECT
-mdb_reader_check0(MDB_env *env, int rlocked, int *dead)
-{
-	mdb_mutexref_t rmutex = rlocked ? NULL : env->me_rmutex;
-	unsigned int i, j, rdrs;
-	MDB_reader *mr;
-	MDB_PID_T *pids, pid;
-	int rc = MDB_SUCCESS, count = 0;
-
-	rdrs = env->me_txns->mti_numreaders;
-	pids = malloc((rdrs+1) * sizeof(MDB_PID_T));
-	if (!pids)
-		return ENOMEM;
-	pids[0] = 0;
-	mr = env->me_txns->mti_readers;
-	for (i=0; i<rdrs; i++) {
-		pid = mr[i].mr_pid;
-		if (pid && pid != env->me_pid) {
-			if (mdb_pid_insert(pids, pid) == 0) {
-				if (!mdb_reader_pid(env, Pidcheck, pid)) {
-					/* Stale reader found */
-					j = i;
-					if (rmutex) {
-						if ((rc = LOCK_MUTEX0(rmutex)) != 0) {
-							if ((rc = mdb_mutex_failed(env, rmutex, rc)))
-								break;
-							rdrs = 0; /* the above checked all readers */
-						} else {
-							/* Recheck, a new process may have reused pid */
-							if (mdb_reader_pid(env, Pidcheck, pid))
-								j = rdrs;
-						}
-					}
-					for (; j<rdrs; j++)
-							if (mr[j].mr_pid == pid) {
-								DPRINTF(("clear stale reader pid %u txn %"Z"d",
-									(unsigned) pid, mr[j].mr_txnid));
-								mr[j].mr_pid = 0;
-								count++;
-							}
-					if (rmutex)
-						UNLOCK_MUTEX(rmutex);
-				}
-			}
-		}
-	}
-	free(pids);
-	if (dead)
-		*dead = count;
-	return rc;
-}
-
-#ifdef MDB_ROBUST_SUPPORTED
-/** Handle #LOCK_MUTEX0() failure.
- * Try to repair the lock file if the mutex owner died.
- * @param[in] env	the environment handle
- * @param[in] mutex	LOCK_MUTEX0() mutex
- * @param[in] rc	LOCK_MUTEX0() error (nonzero)
- * @return 0 on success with the mutex locked, or an error code on failure.
- */
-static int ESECT
-mdb_mutex_failed(MDB_env *env, mdb_mutexref_t mutex, int rc)
-{
-	int rlocked, rc2;
-	MDB_meta *meta;
-
-	if (rc == MDB_OWNERDEAD) {
-		/* We own the mutex. Clean up after dead previous owner. */
-		rc = MDB_SUCCESS;
-		rlocked = (mutex == env->me_rmutex);
-		if (!rlocked) {
-			/* Keep mti_txnid updated, otherwise next writer can
-			 * overwrite data which latest meta page refers to.
-			 */
-			meta = mdb_env_pick_meta(env);
-			env->me_txns->mti_txnid = meta->mm_txnid;
-			/* env is hosed if the dead thread was ours */
-			if (env->me_txn) {
-				env->me_flags |= MDB_FATAL_ERROR;
-				env->me_txn = NULL;
-				rc = MDB_PANIC;
-			}
-		}
-		DPRINTF(("%cmutex owner died, %s", (rlocked ? 'r' : 'w'),
-			(rc ? "this process' env is hosed" : "recovering")));
-		rc2 = mdb_reader_check0(env, rlocked, NULL);
-		if (rc2 == 0)
-			rc2 = mdb_mutex_consistent(mutex);
-		if (rc || (rc = rc2)) {
-			DPRINTF(("LOCK_MUTEX recovery failed, %s", mdb_strerror(rc)));
-			UNLOCK_MUTEX(mutex);
-		}
-	} else {
-#ifdef _WIN32
-		rc = ErrCode();
-#endif
-		DPRINTF(("LOCK_MUTEX failed, %s", mdb_strerror(rc)));
-	}
-
-	return rc;
-}
-#endif	/* MDB_ROBUST_SUPPORTED */
-
-#if defined(_WIN32)
-/** Convert \b src to new wchar_t[] string with room for \b xtra extra chars */
-static int ESECT
-utf8_to_utf16(const char *src, MDB_name *dst, int xtra)
-{
-	int rc, need = 0;
-	wchar_t *result = NULL;
-	for (;;) {					/* malloc result, then fill it in */
-		need = MultiByteToWideChar(CP_UTF8, 0, src, -1, result, need);
-		if (!need) {
-			rc = ErrCode();
-			free(result);
-			return rc;
-		}
-		if (!result) {
-			result = malloc(sizeof(wchar_t) * (need + xtra));
-			if (!result)
-				return ENOMEM;
-			continue;
-		}
-		dst->mn_alloced = 1;
-		dst->mn_len = need - 1;
-		dst->mn_val = result;
-		return MDB_SUCCESS;
-	}
-}
-#endif /* defined(_WIN32) */
-/** @} */

ext/lib/midl.c

@@ -1,359 +0,0 @@
-/**	@file midl.c
- *	@brief ldap bdb back-end ID List functions */
-/* $OpenLDAP$ */
-/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
- *
- * Copyright 2000-2018 The OpenLDAP Foundation.
- * Portions Copyright 2001-2018 Howard Chu, Symas Corp.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted only as authorized by the OpenLDAP
- * Public License.
- *
- * A copy of this license is available in the file LICENSE in the
- * top-level directory of the distribution or, alternatively, at
- * <http://www.OpenLDAP.org/license.html>.
- */
-
-#include <limits.h>
-#include <string.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <sys/types.h>
-#include "midl.h"
-
-/** @defgroup internal	LMDB Internals
- *	@{
- */
-/** @defgroup idls	ID List Management
- *	@{
- */
-#define CMP(x,y)	 ( (x) < (y) ? -1 : (x) > (y) )
-
-unsigned mdb_midl_search( MDB_IDL ids, MDB_ID id )
-{
-	/*
-	 * binary search of id in ids
-	 * if found, returns position of id
-	 * if not found, returns first position greater than id
-	 */
-	unsigned base = 0;
-	unsigned cursor = 1;
-	int val = 0;
-	unsigned n = ids[0];
-
-	while( 0 < n ) {
-		unsigned pivot = n >> 1;
-		cursor = base + pivot + 1;
-		val = CMP( ids[cursor], id );
-
-		if( val < 0 ) {
-			n = pivot;
-
-		} else if ( val > 0 ) {
-			base = cursor;
-			n -= pivot + 1;
-
-		} else {
-			return cursor;
-		}
-	}
-
-	if( val > 0 ) {
-		++cursor;
-	}
-	return cursor;
-}
-
-#if 0	/* superseded by append/sort */
-int mdb_midl_insert( MDB_IDL ids, MDB_ID id )
-{
-	unsigned x, i;
-
-	x = mdb_midl_search( ids, id );
-	assert( x > 0 );
-
-	if( x < 1 ) {
-		/* internal error */
-		return -2;
-	}
-
-	if ( x <= ids[0] && ids[x] == id ) {
-		/* duplicate */
-		assert(0);
-		return -1;
-	}
-
-	if ( ++ids[0] >= MDB_IDL_DB_MAX ) {
-		/* no room */
-		--ids[0];
-		return -2;
-
-	} else {
-		/* insert id */
-		for (i=ids[0]; i>x; i--)
-			ids[i] = ids[i-1];
-		ids[x] = id;
-	}
-
-	return 0;
-}
-#endif
-
-MDB_IDL mdb_midl_alloc(int num)
-{
-	MDB_IDL ids = malloc((num+2) * sizeof(MDB_ID));
-	if (ids) {
-		*ids++ = num;
-		*ids = 0;
-	}
-	return ids;
-}
-
-void mdb_midl_free(MDB_IDL ids)
-{
-	if (ids)
-		free(ids-1);
-}
-
-void mdb_midl_shrink( MDB_IDL *idp )
-{
-	MDB_IDL ids = *idp;
-	if (*(--ids) > MDB_IDL_UM_MAX &&
-		(ids = realloc(ids, (MDB_IDL_UM_MAX+2) * sizeof(MDB_ID))))
-	{
-		*ids++ = MDB_IDL_UM_MAX;
-		*idp = ids;
-	}
-}
-
-static int mdb_midl_grow( MDB_IDL *idp, int num )
-{
-	MDB_IDL idn = *idp-1;
-	/* grow it */
-	idn = realloc(idn, (*idn + num + 2) * sizeof(MDB_ID));
-	if (!idn)
-		return ENOMEM;
-	*idn++ += num;
-	*idp = idn;
-	return 0;
-}
-
-int mdb_midl_need( MDB_IDL *idp, unsigned num )
-{
-	MDB_IDL ids = *idp;
-	num += ids[0];
-	if (num > ids[-1]) {
-		num = (num + num/4 + (256 + 2)) & -256;
-		if (!(ids = realloc(ids-1, num * sizeof(MDB_ID))))
-			return ENOMEM;
-		*ids++ = num - 2;
-		*idp = ids;
-	}
-	return 0;
-}
-
-int mdb_midl_append( MDB_IDL *idp, MDB_ID id )
-{
-	MDB_IDL ids = *idp;
-	/* Too big? */
-	if (ids[0] >= ids[-1]) {
-		if (mdb_midl_grow(idp, MDB_IDL_UM_MAX))
-			return ENOMEM;
-		ids = *idp;
-	}
-	ids[0]++;
-	ids[ids[0]] = id;
-	return 0;
-}
-
-int mdb_midl_append_list( MDB_IDL *idp, MDB_IDL app )
-{
-	MDB_IDL ids = *idp;
-	/* Too big? */
-	if (ids[0] + app[0] >= ids[-1]) {
-		if (mdb_midl_grow(idp, app[0]))
-			return ENOMEM;
-		ids = *idp;
-	}
-	memcpy(&ids[ids[0]+1], &app[1], app[0] * sizeof(MDB_ID));
-	ids[0] += app[0];
-	return 0;
-}
-
-int mdb_midl_append_range( MDB_IDL *idp, MDB_ID id, unsigned n )
-{
-	MDB_ID *ids = *idp, len = ids[0];
-	/* Too big? */
-	if (len + n > ids[-1]) {
-		if (mdb_midl_grow(idp, n | MDB_IDL_UM_MAX))
-			return ENOMEM;
-		ids = *idp;
-	}
-	ids[0] = len + n;
-	ids += len;
-	while (n)
-		ids[n--] = id++;
-	return 0;
-}
-
-void mdb_midl_xmerge( MDB_IDL idl, MDB_IDL merge )
-{
-	MDB_ID old_id, merge_id, i = merge[0], j = idl[0], k = i+j, total = k;
-	idl[0] = (MDB_ID)-1;		/* delimiter for idl scan below */
-	old_id = idl[j];
-	while (i) {
-		merge_id = merge[i--];
-		for (; old_id < merge_id; old_id = idl[--j])
-			idl[k--] = old_id;
-		idl[k--] = merge_id;
-	}
-	idl[0] = total;
-}
-
-/* Quicksort + Insertion sort for small arrays */
-
-#define SMALL	8
-#define	MIDL_SWAP(a,b)	{ itmp=(a); (a)=(b); (b)=itmp; }
-
-void
-mdb_midl_sort( MDB_IDL ids )
-{
-	/* Max possible depth of int-indexed tree * 2 items/level */
-	int istack[sizeof(int)*CHAR_BIT * 2];
-	int i,j,k,l,ir,jstack;
-	MDB_ID a, itmp;
-
-	ir = (int)ids[0];
-	l = 1;
-	jstack = 0;
-	for(;;) {
-		if (ir - l < SMALL) {	/* Insertion sort */
-			for (j=l+1;j<=ir;j++) {
-				a = ids[j];
-				for (i=j-1;i>=1;i--) {
-					if (ids[i] >= a) break;
-					ids[i+1] = ids[i];
-				}
-				ids[i+1] = a;
-			}
-			if (jstack == 0) break;
-			ir = istack[jstack--];
-			l = istack[jstack--];
-		} else {
-			k = (l + ir) >> 1;	/* Choose median of left, center, right */
-			MIDL_SWAP(ids[k], ids[l+1]);
-			if (ids[l] < ids[ir]) {
-				MIDL_SWAP(ids[l], ids[ir]);
-			}
-			if (ids[l+1] < ids[ir]) {
-				MIDL_SWAP(ids[l+1], ids[ir]);
-			}
-			if (ids[l] < ids[l+1]) {
-				MIDL_SWAP(ids[l], ids[l+1]);
-			}
-			i = l+1;
-			j = ir;
-			a = ids[l+1];
-			for(;;) {
-				do i++; while(ids[i] > a);
-				do j--; while(ids[j] < a);
-				if (j < i) break;
-				MIDL_SWAP(ids[i],ids[j]);
-			}
-			ids[l+1] = ids[j];
-			ids[j] = a;
-			jstack += 2;
-			if (ir-i+1 >= j-l) {
-				istack[jstack] = ir;
-				istack[jstack-1] = i;
-				ir = j-1;
-			} else {
-				istack[jstack] = j-1;
-				istack[jstack-1] = l;
-				l = i;
-			}
-		}
-	}
-}
-
-unsigned mdb_mid2l_search( MDB_ID2L ids, MDB_ID id )
-{
-	/*
-	 * binary search of id in ids
-	 * if found, returns position of id
-	 * if not found, returns first position greater than id
-	 */
-	unsigned base = 0;
-	unsigned cursor = 1;
-	int val = 0;
-	unsigned n = (unsigned)ids[0].mid;
-
-	while( 0 < n ) {
-		unsigned pivot = n >> 1;
-		cursor = base + pivot + 1;
-		val = CMP( id, ids[cursor].mid );
-
-		if( val < 0 ) {
-			n = pivot;
-
-		} else if ( val > 0 ) {
-			base = cursor;
-			n -= pivot + 1;
-
-		} else {
-			return cursor;
-		}
-	}
-
-	if( val > 0 ) {
-		++cursor;
-	}
-	return cursor;
-}
-
-int mdb_mid2l_insert( MDB_ID2L ids, MDB_ID2 *id )
-{
-	unsigned x, i;
-
-	x = mdb_mid2l_search( ids, id->mid );
-
-	if( x < 1 ) {
-		/* internal error */
-		return -2;
-	}
-
-	if ( x <= ids[0].mid && ids[x].mid == id->mid ) {
-		/* duplicate */
-		return -1;
-	}
-
-	if ( ids[0].mid >= MDB_IDL_UM_MAX ) {
-		/* too big */
-		return -2;
-
-	} else {
-		/* insert id */
-		ids[0].mid++;
-		for (i=(unsigned)ids[0].mid; i>x; i--)
-			ids[i] = ids[i-1];
-		ids[x] = *id;
-	}
-
-	return 0;
-}
-
-int mdb_mid2l_append( MDB_ID2L ids, MDB_ID2 *id )
-{
-	/* Too big? */
-	if (ids[0].mid >= MDB_IDL_UM_MAX) {
-		return -2;
-	}
-	ids[0].mid++;
-	ids[ids[0].mid] = *id;
-	return 0;
-}
-
-/** @} */
-/** @} */

ext/lib/tpl.c

@@ -1,2489 +0,0 @@
-/*
-Copyright (c) 2005-2013, Troy D. Hanson     http://troydhanson.github.com/tpl/
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
-
-    * Redistributions of source code must retain the above copyright
-      notice, this list of conditions and the following disclaimer.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
-OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-#define TPL_VERSION 1.6
-
-static const char id[]="$Id: tpl.c 192 2009-04-24 10:35:30Z thanson $";
-
-
-#include <stdlib.h>  /* malloc */
-#include <stdarg.h>  /* va_list */
-#include <string.h>  /* memcpy, memset, strchr */
-#include <stdio.h>   /* printf (tpl_hook.oops default function) */
-
-#ifndef _WIN32
-#include <unistd.h>     /* for ftruncate */
-#else
-#include <io.h>
-#define ftruncate(x,y) _chsize(x,y)
-#endif
-#include <sys/types.h>  /* for 'open' */
-#include <sys/stat.h>   /* for 'open' */
-#include <fcntl.h>      /* for 'open' */
-#include <errno.h>
-#ifndef _WIN32
-#include <inttypes.h>   /* uint32_t, uint64_t, etc */
-#else
-typedef unsigned short ushort;
-typedef __int16 int16_t;
-typedef __int32 int32_t;
-typedef __int64 int64_t;
-typedef unsigned __int16 uint16_t;
-typedef unsigned __int32 uint32_t;
-typedef unsigned __int64 uint64_t;
-#endif
-
-#ifndef S_ISREG
-#define S_ISREG(mode)  (((mode) & S_IFMT) == S_IFREG)
-#endif
-
-#if ( defined __CYGWIN__ || defined __MINGW32__ || defined _WIN32 )
-#include "win/mman.h"   /* mmap */
-#else
-#include <sys/mman.h>   /* mmap */
-#endif
-
-#include "tpl.h"
-
-#define TPL_GATHER_BUFLEN 8192
-#define TPL_MAGIC "tpl"
-
-/* macro to add a structure to a doubly-linked list */
-#define DL_ADD(head,add)                                        \
-    do {                                                        \
-        if (head) {                                             \
-            (add)->prev = (head)->prev;                         \
-            (head)->prev->next = (add);                         \
-            (head)->prev = (add);                               \
-            (add)->next = NULL;                                 \
-        } else {                                                \
-            (head)=(add);                                       \
-            (head)->prev = (head);                              \
-            (head)->next = NULL;                                \
-        }                                                       \
-    } while (0);
-
-#define fatal_oom() tpl_hook.fatal("out of memory\n")
-
-/* bit flags (internal). preceded by the external flags in tpl.h */
-#define TPL_WRONLY         (1 << 9)  /* app has initiated tpl packing  */
-#define TPL_RDONLY         (1 << 10)  /* tpl was loaded (for unpacking) */
-#define TPL_XENDIAN        (1 << 11)  /* swap endianness when unpacking */
-#define TPL_OLD_STRING_FMT (1 << 12) /* tpl has strings in 1.2 format */
-
-/* values for the flags byte that appears after the magic prefix */
-#define TPL_SUPPORTED_BITFLAGS 3
-#define TPL_FL_BIGENDIAN   (1 << 0)
-#define TPL_FL_NULLSTRINGS (1 << 1)
-
-/* char values for node type */
-#define TPL_TYPE_ROOT   0
-#define TPL_TYPE_INT32  1
-#define TPL_TYPE_UINT32 2
-#define TPL_TYPE_BYTE   3
-#define TPL_TYPE_STR    4
-#define TPL_TYPE_ARY    5
-#define TPL_TYPE_BIN    6
-#define TPL_TYPE_DOUBLE 7
-#define TPL_TYPE_INT64  8
-#define TPL_TYPE_UINT64 9
-#define TPL_TYPE_INT16  10
-#define TPL_TYPE_UINT16 11
-#define TPL_TYPE_POUND  12
-
-/* error codes */
-#define ERR_NOT_MINSIZE        (-1)
-#define ERR_MAGIC_MISMATCH     (-2)
-#define ERR_INCONSISTENT_SZ    (-3)
-#define ERR_FMT_INVALID        (-4)
-#define ERR_FMT_MISSING_NUL    (-5)
-#define ERR_FMT_MISMATCH       (-6)
-#define ERR_FLEN_MISMATCH      (-7)
-#define ERR_INCONSISTENT_SZ2   (-8)
-#define ERR_INCONSISTENT_SZ3   (-9)
-#define ERR_INCONSISTENT_SZ4   (-10)
-#define ERR_UNSUPPORTED_FLAGS  (-11)
-
-/* access to A(...) nodes by index */
-typedef struct tpl_pidx {
-    struct tpl_node *node;
-    struct tpl_pidx *next,*prev;
-} tpl_pidx;
-
-/* A(...) node datum */
-typedef struct tpl_atyp {
-    uint32_t num;    /* num elements */
-    size_t sz;       /* size of each backbone's datum */
-    struct tpl_backbone *bb,*bbtail; 
-    void *cur;                       
-} tpl_atyp;
-
-/* backbone to extend A(...) lists dynamically */
-typedef struct tpl_backbone {
-    struct tpl_backbone *next;
-    /* when this structure is malloc'd, extra space is alloc'd at the
-     * end to store the backbone "datum", and data points to it. */
-#if __STDC_VERSION__ < 199901
-    char *data;  
-#else
-    char data[];
-#endif
-} tpl_backbone;
-
-/* mmap record */
-typedef struct tpl_mmap_rec {
-    int fd;
-    void *text;
-    size_t text_sz;
-} tpl_mmap_rec;
-
-/* root node datum */
-typedef struct tpl_root_data {
-    int flags;
-    tpl_pidx *pidx;
-    tpl_mmap_rec mmap;
-    char *fmt;
-    int *fxlens, num_fxlens;
-} tpl_root_data;
-
-/* node type to size mapping */
-struct tpl_type_t {
-    char c;
-    int sz;
-};
-
-
-/* Internal prototypes */
-static tpl_node *tpl_node_new(tpl_node *parent);
-static tpl_node *tpl_find_i(tpl_node *n, int i);
-static void *tpl_cpv(void *datav, const void *data, size_t sz);
-static void *tpl_extend_backbone(tpl_node *n);
-static char *tpl_fmt(tpl_node *r);
-static void *tpl_dump_atyp(tpl_node *n, tpl_atyp* at, void *dv);
-static size_t tpl_ser_osz(tpl_node *n);
-static void tpl_free_atyp(tpl_node *n,tpl_atyp *atyp);
-static int tpl_dump_to_mem(tpl_node *r, void *addr, size_t sz);
-static int tpl_mmap_file(char *filename, tpl_mmap_rec *map_rec);
-static int tpl_mmap_output_file(char *filename, size_t sz, void **text_out);
-static int tpl_cpu_bigendian(void);
-static int tpl_needs_endian_swap(void *);
-static void tpl_byteswap(void *word, int len);
-static void tpl_fatal(const char *fmt, ...);
-static int tpl_serlen(tpl_node *r, tpl_node *n, void *dv, size_t *serlen);
-static int tpl_unpackA0(tpl_node *r);
-static int tpl_oops(const char *fmt, ...);
-static int tpl_gather_mem( char *buf, size_t len, tpl_gather_t **gs, tpl_gather_cb *cb, void *data);
-static int tpl_gather_nonblocking( int fd, tpl_gather_t **gs, tpl_gather_cb *cb, void *data);
-static int tpl_gather_blocking(int fd, void **img, size_t *sz);
-
-/* This is used internally to help calculate padding when a 'double' 
- * follows a smaller datatype in a structure. Normally under gcc
- * on x86, d will be aligned at +4, however use of -malign-double
- * causes d to be aligned at +8 (this is actually faster on x86).
- * Also SPARC and x86_64 seem to align always on +8. 
- */
-struct tpl_double_alignment_detector {
-    char a;
-    double d;  /* some platforms align this on +4, others on +8 */
-};
-
-/* this is another case where alignment varies. mac os x/gcc was observed
- * to align the int64_t at +4 under -m32 and at +8 under -m64 */
-struct tpl_int64_alignment_detector {
-    int i;
-    int64_t j;  /* some platforms align this on +4, others on +8 */
-};
-
-typedef struct {
-  size_t inter_elt_len; /* padded inter-element len; i.e. &a[1].field - &a[0].field */
-  tpl_node *iter_start_node; /* node to jump back to, as we start each new iteration */
-  size_t iternum; /* current iteration number (total req'd. iter's in n->num) */
-} tpl_pound_data;
-
-/* Hooks for customizing tpl mem alloc, error handling, etc. Set defaults. */
-tpl_hook_t tpl_hook = {
-    /* .oops =       */ tpl_oops,
-    /* .malloc =     */ malloc,
-    /* .realloc =    */ realloc,
-    /* .free =       */ free,
-    /* .fatal =      */ tpl_fatal,
-    /* .gather_max = */ 0 /* max tpl size (bytes) for tpl_gather */
-};
-
-static const char tpl_fmt_chars[] = "AS($)BiucsfIUjv#"; /* valid format chars */
-static const char tpl_S_fmt_chars[] = "iucsfIUjv#$()"; /* valid within S(...) */
-static const char tpl_datapeek_ok_chars[] = "iucsfIUjv"; /* valid in datapeek */
-static const struct tpl_type_t tpl_types[] = {
-    /* [TPL_TYPE_ROOT] =   */  {'r', 0},
-    /* [TPL_TYPE_INT32] =  */  {'i', sizeof(int32_t)},
-    /* [TPL_TYPE_UINT32] = */  {'u', sizeof(uint32_t)},
-    /* [TPL_TYPE_BYTE] =   */  {'c', sizeof(char)},
-    /* [TPL_TYPE_STR] =    */  {'s', sizeof(char*)},
-    /* [TPL_TYPE_ARY] =    */  {'A', 0},
-    /* [TPL_TYPE_BIN] =    */  {'B', 0},
-    /* [TPL_TYPE_DOUBLE] = */  {'f', 8}, /* not sizeof(double) as that varies */
-    /* [TPL_TYPE_INT64] =  */  {'I', sizeof(int64_t)},
-    /* [TPL_TYPE_UINT64] = */  {'U', sizeof(uint64_t)},
-    /* [TPL_TYPE_INT16] =  */  {'j', sizeof(int16_t)},
-    /* [TPL_TYPE_UINT16] = */  {'v', sizeof(uint16_t)},
-    /* [TPL_TYPE_POUND] =  */  {'#', 0},
-};
-
-/* default error-reporting function. Just writes to stderr. */
-static int tpl_oops(const char *fmt, ...) {
-    va_list ap;
-    va_start(ap,fmt);
-    vfprintf(stderr,fmt,ap);
-    va_end(ap);
-    return 0;
-}
-
-
-static tpl_node *tpl_node_new(tpl_node *parent) {
-    tpl_node *n;
-    if ((n=tpl_hook.malloc(sizeof(tpl_node))) == NULL) {
-        fatal_oom();
-    }
-    n->addr=NULL;
-    n->data=NULL;
-    n->num=1;
-    n->ser_osz=0;
-    n->children=NULL;
-    n->next=NULL;
-    n->parent=parent;
-    return n;
-}
-
-/* Used in S(..) formats to pack several fields from a structure based on 
- * only the structure address. We need to calculate field addresses 
- * manually taking into account the size of the fields and intervening padding.
- * The wrinkle is that double is not normally aligned on x86-32 but the
- * -malign-double compiler option causes it to be. Double are aligned
- * on Sparc, and apparently on 64 bit x86. We use a helper structure 
- * to detect whether double is aligned in this compilation environment.
- */
-char *calc_field_addr(tpl_node *parent, int type,char *struct_addr, int ordinal) {
-    tpl_node *prev;
-    int offset;
-    int align_sz;
-
-    if (ordinal == 1) return struct_addr;  /* first field starts on structure address */
-
-    /* generate enough padding so field addr is divisible by it's align_sz. 4, 8, etc */
-    prev = parent->children->prev; 
-    switch(type) {
-      case TPL_TYPE_DOUBLE:
-        align_sz = sizeof(struct tpl_double_alignment_detector) > 12 ? 8 : 4; 
-        break;
-      case TPL_TYPE_INT64:
-      case TPL_TYPE_UINT64:
-        align_sz = sizeof(struct tpl_int64_alignment_detector) > 12 ? 8 : 4; 
-        break;
-      default:
-        align_sz = tpl_types[type].sz;
-        break;
-    }
-    offset = ((uintptr_t)prev->addr - (uintptr_t)struct_addr)
-            + (tpl_types[prev->type].sz * prev->num);
-    offset = (offset + align_sz - 1) / align_sz * align_sz;
-    return struct_addr + offset;
-}
-
-TPL_API tpl_node *tpl_map(char *fmt,...) {
-  va_list ap;
-  tpl_node *tn;
-
-  va_start(ap,fmt);
-  tn = tpl_map_va(fmt, ap);
-  va_end(ap);
-  return tn;
-}
-
-TPL_API tpl_node *tpl_map_va(char *fmt, va_list ap) {
-    int lparen_level=0,expect_lparen=0,t=0,in_structure=0,ordinal=0;
-    int in_nested_structure=0;
-    char *c, *peek, *struct_addr=NULL, *struct_next;
-    tpl_node *root,*parent,*n=NULL,*preceding,*iter_start_node=NULL,
-             *struct_widest_node=NULL, *np; tpl_pidx *pidx;
-    tpl_pound_data *pd;
-    int *fxlens, num_fxlens, pound_num, pound_prod, applies_to_struct;
-    int contig_fxlens[10]; /* temp space for contiguous fxlens */
-    int num_contig_fxlens, i, j;
-    ptrdiff_t inter_elt_len=0; /* padded element length of contiguous structs in array */
-
-
-    root = tpl_node_new(NULL);
-    root->type = TPL_TYPE_ROOT; 
-    root->data = (tpl_root_data*)tpl_hook.malloc(sizeof(tpl_root_data));
-    if (!root->data) fatal_oom();
-    memset((tpl_root_data*)root->data,0,sizeof(tpl_root_data));
-
-    /* set up root nodes special ser_osz to reflect overhead of preamble */
-    root->ser_osz =  sizeof(uint32_t); /* tpl leading length */
-    root->ser_osz += strlen(fmt) + 1;  /* fmt + NUL-terminator */
-    root->ser_osz += 4;                /* 'tpl' magic prefix + flags byte */
-
-    parent=root;
-
-    c=fmt;
-    while (*c != '\0') {
-        switch (*c) {
-            case 'c':
-            case 'i':
-            case 'u':
-            case 'j':
-            case 'v':
-            case 'I':
-            case 'U':
-            case 'f':
-                if      (*c=='c') t=TPL_TYPE_BYTE;
-                else if (*c=='i') t=TPL_TYPE_INT32;
-                else if (*c=='u') t=TPL_TYPE_UINT32;
-                else if (*c=='j') t=TPL_TYPE_INT16;
-                else if (*c=='v') t=TPL_TYPE_UINT16;
-                else if (*c=='I') t=TPL_TYPE_INT64;
-                else if (*c=='U') t=TPL_TYPE_UINT64;
-                else if (*c=='f') t=TPL_TYPE_DOUBLE;
-
-                if (expect_lparen) goto fail;
-                n = tpl_node_new(parent);
-                n->type = t;
-                if (in_structure) {
-                    if (ordinal == 1) {
-                      /* for S(...)# iteration. Apply any changes to case 's' too!!! */
-                      iter_start_node = n; 
-                      struct_widest_node = n;
-                    }
-                    if (tpl_types[n->type].sz > tpl_types[struct_widest_node->type].sz) {
-                      struct_widest_node = n;
-                    }
-                    n->addr = calc_field_addr(parent,n->type,struct_addr,ordinal++);
-                } else n->addr = (void*)va_arg(ap,void*);
-                n->data = tpl_hook.malloc(tpl_types[t].sz);
-                if (!n->data) fatal_oom();
-                if (n->parent->type == TPL_TYPE_ARY) 
-                    ((tpl_atyp*)(n->parent->data))->sz += tpl_types[t].sz;
-                DL_ADD(parent->children,n);
-                break;
-            case 's':
-                if (expect_lparen) goto fail;
-                n = tpl_node_new(parent);
-                n->type = TPL_TYPE_STR;
-                if (in_structure) {
-                    if (ordinal == 1) {
-                      iter_start_node = n; /* for S(...)# iteration */
-                      struct_widest_node = n;
-                    }
-                    if (tpl_types[n->type].sz > tpl_types[struct_widest_node->type].sz) {
-                      struct_widest_node = n;
-                    }
-                    n->addr = calc_field_addr(parent,n->type,struct_addr,ordinal++);
-                } else n->addr = (void*)va_arg(ap,void*);
-                n->data = tpl_hook.malloc(sizeof(char*));
-                if (!n->data) fatal_oom();
-                *(char**)(n->data) = NULL;
-                if (n->parent->type == TPL_TYPE_ARY) 
-                    ((tpl_atyp*)(n->parent->data))->sz += sizeof(void*);
-                DL_ADD(parent->children,n);
-                break;
-            case '#':
-                /* apply a 'num' to preceding atom */
-                if (!parent->children) goto fail;
-                preceding = parent->children->prev; /* first child's prev is 'last child'*/
-                t = preceding->type;
-                applies_to_struct = (*(c-1) == ')') ? 1 : 0;
-                if (!applies_to_struct) {
-                  if (!(t == TPL_TYPE_BYTE   || t == TPL_TYPE_INT32 ||
-                        t == TPL_TYPE_UINT32 || t == TPL_TYPE_DOUBLE ||
-                        t == TPL_TYPE_UINT64 || t == TPL_TYPE_INT64 || 
-                        t == TPL_TYPE_UINT16 || t == TPL_TYPE_INT16 || 
-                        t == TPL_TYPE_STR )) goto fail;
-                }
-                /* count up how many contiguous # and form their product */
-                pound_prod=1;
-                num_contig_fxlens=0;
-                for(peek=c; *peek == '#'; peek++) {
-                  pound_num = va_arg(ap, int);
-                  if (pound_num < 1) {
-                    tpl_hook.fatal("non-positive iteration count %d\n", pound_num);
-                  }
-                  if (num_contig_fxlens >= (sizeof(contig_fxlens)/sizeof(contig_fxlens[0]))) {
-                    tpl_hook.fatal("contiguous # exceeds hardcoded limit\n");
-                  }
-                  contig_fxlens[num_contig_fxlens++] = pound_num;
-                  pound_prod *= pound_num;
-                }
-                /* increment c to skip contiguous # so its points to last one */
-                c = peek-1;
-                /* differentiate atom-# from struct-# by noting preceding rparen */
-                if (applies_to_struct) { /* insert # node to induce looping */
-                  n = tpl_node_new(parent);
-                  n->type = TPL_TYPE_POUND;
-                  n->num = pound_prod;
-                  n->data = tpl_hook.malloc(sizeof(tpl_pound_data));
-                  if (!n->data) fatal_oom();
-                  pd = (tpl_pound_data*)n->data;
-                  pd->inter_elt_len = inter_elt_len;
-                  pd->iter_start_node = iter_start_node; 
-                  pd->iternum = 0;
-                  DL_ADD(parent->children,n);
-                  /* multiply the 'num' and data space on each atom in the structure */
-                  for(np = iter_start_node; np != n; np = np->next) {
-                    if (n->parent->type == TPL_TYPE_ARY) {
-                      ((tpl_atyp*)(n->parent->data))->sz += 
-                         tpl_types[np->type].sz * (np->num * (n->num - 1));
-                    }
-                    np->data = tpl_hook.realloc(np->data, tpl_types[np->type].sz * 
-                                                          np->num * n->num);
-                    if (!np->data) fatal_oom();
-                    memset(np->data, 0, tpl_types[np->type].sz * np->num * n->num);
-                  }
-                } else { /* simple atom-# form does not require a loop */
-                  preceding->num = pound_prod;
-                  preceding->data = tpl_hook.realloc(preceding->data, 
-                      tpl_types[t].sz * preceding->num);
-                  if (!preceding->data) fatal_oom();
-                  memset(preceding->data,0,tpl_types[t].sz * preceding->num);
-                  if (n->parent->type == TPL_TYPE_ARY) {
-                      ((tpl_atyp*)(n->parent->data))->sz += tpl_types[t].sz * 
-                                                            (preceding->num-1);
-                  }
-                }
-                root->ser_osz += (sizeof(uint32_t) * num_contig_fxlens);
-
-                j = ((tpl_root_data*)root->data)->num_fxlens; /* before incrementing */
-                (((tpl_root_data*)root->data)->num_fxlens) += num_contig_fxlens;
-                num_fxlens = ((tpl_root_data*)root->data)->num_fxlens; /* new value */
-                fxlens = ((tpl_root_data*)root->data)->fxlens;
-                fxlens = tpl_hook.realloc(fxlens, sizeof(int) * num_fxlens);
-                if (!fxlens) fatal_oom();
-                ((tpl_root_data*)root->data)->fxlens = fxlens;
-                for(i=0; i < num_contig_fxlens; i++) fxlens[j++] = contig_fxlens[i];
-
-                break;
-            case 'B':
-                if (expect_lparen) goto fail;
-                if (in_structure) goto fail;
-                n = tpl_node_new(parent);
-                n->type = TPL_TYPE_BIN;
-                n->addr = (tpl_bin*)va_arg(ap,void*);
-                n->data = tpl_hook.malloc(sizeof(tpl_bin*));
-                if (!n->data) fatal_oom();
-                *((tpl_bin**)n->data) = NULL;
-                if (n->parent->type == TPL_TYPE_ARY) 
-                    ((tpl_atyp*)(n->parent->data))->sz += sizeof(tpl_bin);
-                DL_ADD(parent->children,n);
-                break;
-            case 'A':
-                if (in_structure) goto fail;
-                n = tpl_node_new(parent);
-                n->type = TPL_TYPE_ARY;
-                DL_ADD(parent->children,n);
-                parent = n;
-                expect_lparen=1;
-                pidx = (tpl_pidx*)tpl_hook.malloc(sizeof(tpl_pidx));
-                if (!pidx) fatal_oom();
-                pidx->node = n;
-                pidx->next = NULL;
-                DL_ADD(((tpl_root_data*)(root->data))->pidx,pidx);
-                /* set up the A's tpl_atyp */
-                n->data = (tpl_atyp*)tpl_hook.malloc(sizeof(tpl_atyp));
-                if (!n->data) fatal_oom();
-                ((tpl_atyp*)(n->data))->num = 0;
-                ((tpl_atyp*)(n->data))->sz = 0;
-                ((tpl_atyp*)(n->data))->bb = NULL;
-                ((tpl_atyp*)(n->data))->bbtail = NULL;
-                ((tpl_atyp*)(n->data))->cur = NULL;
-                if (n->parent->type == TPL_TYPE_ARY) 
-                    ((tpl_atyp*)(n->parent->data))->sz += sizeof(void*);
-                break;
-            case 'S':
-                if (in_structure) goto fail;
-                expect_lparen=1;
-                ordinal=1;  /* index upcoming atoms in S(..) */
-                in_structure=1+lparen_level; /* so we can tell where S fmt ends */
-                struct_addr = (char*)va_arg(ap,void*);
-                break;
-            case '$': /* nested structure */
-                if (!in_structure) goto fail;
-                expect_lparen=1;
-                in_nested_structure++;
-                break;
-            case ')':
-                lparen_level--;
-                if (lparen_level < 0) goto fail;
-                if (*(c-1) == '(') goto fail;
-                if (in_nested_structure) in_nested_structure--;
-                else if (in_structure && (in_structure-1 == lparen_level)) {
-                  /* calculate delta between contiguous structures in array */
-                  struct_next = calc_field_addr(parent, struct_widest_node->type, 
-                                                struct_addr, ordinal++);
-                  inter_elt_len = struct_next - struct_addr;
-                  in_structure=0;
-                }
-                else parent = parent->parent; /* rparen ends A() type, not S() type */
-                break;
-            case '(':
-                if (!expect_lparen) goto fail;
-                expect_lparen=0;
-                lparen_level++;
-                break;
-            default:
-                tpl_hook.oops("unsupported option %c\n", *c);
-                goto fail;
-        }
-        c++;
-    }
-    if (lparen_level != 0) goto fail;
-
-    /* copy the format string, save for convenience */
-    ((tpl_root_data*)(root->data))->fmt = tpl_hook.malloc(strlen(fmt)+1);
-    if (((tpl_root_data*)(root->data))->fmt == NULL) 
-        fatal_oom();
-    memcpy(((tpl_root_data*)(root->data))->fmt,fmt,strlen(fmt)+1);
-
-    return root;
-
-fail:
-    tpl_hook.oops("failed to parse %s\n", fmt);
-    tpl_free(root);
-    return NULL;
-}
-
-static int tpl_unmap_file( tpl_mmap_rec *mr) {
-
-    if ( munmap( mr->text, mr->text_sz ) == -1 ) {
-        tpl_hook.oops("Failed to munmap: %s\n", strerror(errno));
-    }
-    close(mr->fd);
-    mr->text = NULL;
-    mr->text_sz = 0;
-    return 0;
-}
-
-static void tpl_free_keep_map(tpl_node *r) {
-    int mmap_bits = (TPL_RDONLY|TPL_FILE);
-    int ufree_bits = (TPL_MEM|TPL_UFREE);
-    tpl_node *nxtc,*c;
-    int find_next_node=0,looking,i;
-    size_t sz;
-
-    /* For mmap'd files, or for 'ufree' memory images , do appropriate release */
-    if ((((tpl_root_data*)(r->data))->flags & mmap_bits) == mmap_bits) {
-        tpl_unmap_file( &((tpl_root_data*)(r->data))->mmap); 
-    } else if ((((tpl_root_data*)(r->data))->flags & ufree_bits) == ufree_bits) {
-        tpl_hook.free( ((tpl_root_data*)(r->data))->mmap.text );
-    }
-
-    c = r->children;
-    if (c) {
-        while(c->type != TPL_TYPE_ROOT) {    /* loop until we come back to root node */
-            switch (c->type) {
-                case TPL_TYPE_BIN:
-                    /* free any binary buffer hanging from tpl_bin */
-                    if ( *((tpl_bin**)(c->data)) ) {
-                        if ( (*((tpl_bin**)(c->data)))->addr ) {
-                            tpl_hook.free( (*((tpl_bin**)(c->data)))->addr );
-                        }
-                        *((tpl_bin**)c->data) = NULL; /* reset tpl_bin */
-                    }
-                    find_next_node=1;
-                    break;
-                case TPL_TYPE_STR:
-                    /* free any packed (copied) string */
-                    for(i=0; i < c->num; i++) {
-                      char *str = ((char**)c->data)[i];
-                      if (str) {
-                        tpl_hook.free(str);
-                        ((char**)c->data)[i] = NULL;
-                      }
-                    }
-                    find_next_node=1;
-                    break;
-                case TPL_TYPE_INT32:
-                case TPL_TYPE_UINT32:
-                case TPL_TYPE_INT64:
-                case TPL_TYPE_UINT64:
-                case TPL_TYPE_BYTE:
-                case TPL_TYPE_DOUBLE:
-                case TPL_TYPE_INT16:
-                case TPL_TYPE_UINT16:
-                case TPL_TYPE_POUND:
-                    find_next_node=1;
-                    break;
-                case TPL_TYPE_ARY:
-                    c->ser_osz = 0; /* zero out the serialization output size */
-
-                    sz = ((tpl_atyp*)(c->data))->sz;  /* save sz to use below */
-                    tpl_free_atyp(c,c->data);
-
-                    /* make new atyp */
-                    c->data = (tpl_atyp*)tpl_hook.malloc(sizeof(tpl_atyp));
-                    if (!c->data) fatal_oom();
-                    ((tpl_atyp*)(c->data))->num = 0;
-                    ((tpl_atyp*)(c->data))->sz = sz;  /* restore bb datum sz */
-                    ((tpl_atyp*)(c->data))->bb = NULL;
-                    ((tpl_atyp*)(c->data))->bbtail = NULL;
-                    ((tpl_atyp*)(c->data))->cur = NULL;
-
-                    c = c->children; 
-                    break;
-                default:
-                    tpl_hook.fatal("unsupported format character\n");
-                    break;
-            }
-
-            if (find_next_node) {
-                find_next_node=0;
-                looking=1;
-                while(looking) {
-                    if (c->next) {
-                        nxtc=c->next;
-                        c=nxtc;
-                        looking=0;
-                    } else {
-                        if (c->type == TPL_TYPE_ROOT) break; /* root node */
-                        else {
-                            nxtc=c->parent;
-                            c=nxtc;
-                        }
-                    }
-                }
-            }
-        }
-    }
-
-    ((tpl_root_data*)(r->data))->flags = 0;  /* reset flags */
-}
-
-TPL_API void tpl_free(tpl_node *r) {
-    int mmap_bits = (TPL_RDONLY|TPL_FILE);
-    int ufree_bits = (TPL_MEM|TPL_UFREE);
-    tpl_node *nxtc,*c;
-    int find_next_node=0,looking,num,i;
-    tpl_pidx *pidx,*pidx_nxt;
-
-    /* For mmap'd files, or for 'ufree' memory images , do appropriate release */
-    if ((((tpl_root_data*)(r->data))->flags & mmap_bits) == mmap_bits) {
-        tpl_unmap_file( &((tpl_root_data*)(r->data))->mmap); 
-    } else if ((((tpl_root_data*)(r->data))->flags & ufree_bits) == ufree_bits) {
-        tpl_hook.free( ((tpl_root_data*)(r->data))->mmap.text );
-    }
-
-    c = r->children;
-    if (c) {
-        while(c->type != TPL_TYPE_ROOT) {    /* loop until we come back to root node */
-            switch (c->type) {
-                case TPL_TYPE_BIN:
-                    /* free any binary buffer hanging from tpl_bin */
-                    if ( *((tpl_bin**)(c->data)) ) {
-                        if ( (*((tpl_bin**)(c->data)))->sz != 0 ) {
-                            tpl_hook.free( (*((tpl_bin**)(c->data)))->addr );
-                        }
-                        tpl_hook.free(*((tpl_bin**)c->data)); /* free tpl_bin */
-                    }
-                    tpl_hook.free(c->data);  /* free tpl_bin* */
-                    find_next_node=1;
-                    break;
-                case TPL_TYPE_STR:
-                    /* free any packed (copied) string */
-                    num = 1;
-                    nxtc = c->next;
-                    while (nxtc) {
-                        if (nxtc->type == TPL_TYPE_POUND) {
-                            num = nxtc->num;
-                        }
-                        nxtc = nxtc->next;
-                    }
-                    for (i = 0; i < c->num * num; i++) {
-                        char *str = ((char**)c->data)[i];
-                        if (str) {
-                            tpl_hook.free(str);
-                            ((char**)c->data)[i] = NULL;
-                        }
-                    }
-                    tpl_hook.free(c->data);
-                    find_next_node=1;
-                    break;
-                case TPL_TYPE_INT32:
-                case TPL_TYPE_UINT32:
-                case TPL_TYPE_INT64:
-                case TPL_TYPE_UINT64:
-                case TPL_TYPE_BYTE:
-                case TPL_TYPE_DOUBLE:
-                case TPL_TYPE_INT16:
-                case TPL_TYPE_UINT16:
-                case TPL_TYPE_POUND:
-                    tpl_hook.free(c->data);
-                    find_next_node=1;
-                    break;
-                case TPL_TYPE_ARY:
-                    tpl_free_atyp(c,c->data);
-                    if (c->children) c = c->children; /* normal case */
-                    else find_next_node=1; /* edge case, handle bad format A() */
-                    break;
-                default:
-                    tpl_hook.fatal("unsupported format character\n");
-                    break;
-            }
-
-            if (find_next_node) {
-                find_next_node=0;
-                looking=1;
-                while(looking) {
-                    if (c->next) {
-                        nxtc=c->next;
-                        tpl_hook.free(c);
-                        c=nxtc;
-                        looking=0;
-                    } else {
-                        if (c->type == TPL_TYPE_ROOT) break; /* root node */
-                        else {
-                            nxtc=c->parent;
-                            tpl_hook.free(c);
-                            c=nxtc;
-                        }
-                    }
-                }
-            }
-        }
-    }
-
-    /* free root */
-    for(pidx=((tpl_root_data*)(r->data))->pidx; pidx; pidx=pidx_nxt) {
-        pidx_nxt = pidx->next;
-        tpl_hook.free(pidx);
-    }
-    tpl_hook.free(((tpl_root_data*)(r->data))->fmt);
-    if (((tpl_root_data*)(r->data))->num_fxlens > 0) {
-        tpl_hook.free(((tpl_root_data*)(r->data))->fxlens);
-    }
-    tpl_hook.free(r->data);  /* tpl_root_data */
-    tpl_hook.free(r);
-}
-
-
-/* Find the i'th packable ('A' node) */
-static tpl_node *tpl_find_i(tpl_node *n, int i) {
-    int j=0;
-    tpl_pidx *pidx;
-    if (n->type != TPL_TYPE_ROOT) return NULL;
-    if (i == 0) return n;  /* packable 0 is root */
-    for(pidx=((tpl_root_data*)(n->data))->pidx; pidx; pidx=pidx->next) {
-        if (++j == i) return pidx->node;
-    }
-    return NULL;
-}
-
-static void *tpl_cpv(void *datav, const void *data, size_t sz) {
-    if (sz>0) memcpy(datav,data,sz);
-    return (void*)((uintptr_t)datav + sz);
-}
-
-static void *tpl_extend_backbone(tpl_node *n) {
-    tpl_backbone *bb;
-    bb = (tpl_backbone*)tpl_hook.malloc(sizeof(tpl_backbone) +
-      ((tpl_atyp*)(n->data))->sz );  /* datum hangs on coattails of bb */
-    if (!bb) fatal_oom();
-#if __STDC_VERSION__ < 199901
-    bb->data = (char*)((uintptr_t)bb + sizeof(tpl_backbone)); 
-#endif
-    memset(bb->data,0,((tpl_atyp*)(n->data))->sz);
-    bb->next = NULL;
-    /* Add the new backbone to the tail, also setting head if necessary  */
-    if (((tpl_atyp*)(n->data))->bb == NULL) {
-        ((tpl_atyp*)(n->data))->bb = bb;
-        ((tpl_atyp*)(n->data))->bbtail = bb;
-    } else {
-        ((tpl_atyp*)(n->data))->bbtail->next = bb;
-        ((tpl_atyp*)(n->data))->bbtail = bb;
-    }
-
-    ((tpl_atyp*)(n->data))->num++;
-    return bb->data;
-}
-
-/* Get the format string corresponding to a given tpl (root node) */
-static char *tpl_fmt(tpl_node *r) {
-    return ((tpl_root_data*)(r->data))->fmt;
-}
-
-/* Get the fmt # lengths as a contiguous buffer of ints (length num_fxlens) */
-static int *tpl_fxlens(tpl_node *r, int *num_fxlens) {
-    *num_fxlens = ((tpl_root_data*)(r->data))->num_fxlens;
-    return ((tpl_root_data*)(r->data))->fxlens;
-}
-
-/* called when serializing an 'A' type node into a buffer which has
- * already been set up with the proper space. The backbone is walked
- * which was obtained from the tpl_atyp header passed in. 
- */
-static void *tpl_dump_atyp(tpl_node *n, tpl_atyp* at, void *dv) {
-    tpl_backbone *bb;
-    tpl_node *c;
-    void *datav;
-    uint32_t slen;
-    tpl_bin *binp;
-    char *strp;
-    tpl_atyp *atypp;
-    tpl_pound_data *pd;
-    int i;
-    size_t itermax;
-
-    /* handle 'A' nodes */
-    dv = tpl_cpv(dv,&at->num,sizeof(uint32_t));  /* array len */
-    for(bb=at->bb; bb; bb=bb->next) {
-        datav = bb->data;
-        c=n->children;
-        while(c) {
-            switch (c->type) {
-                case TPL_TYPE_BYTE:
-                case TPL_TYPE_DOUBLE:
-                case TPL_TYPE_INT32:
-                case TPL_TYPE_UINT32:
-                case TPL_TYPE_INT64:
-                case TPL_TYPE_UINT64:
-                case TPL_TYPE_INT16:
-                case TPL_TYPE_UINT16:
-                    dv = tpl_cpv(dv,datav,tpl_types[c->type].sz * c->num);
-                    datav = (void*)((uintptr_t)datav + tpl_types[c->type].sz * c->num);
-                    break;
-                case TPL_TYPE_BIN:
-                    /* dump the buffer length followed by the buffer */
-                    memcpy(&binp,datav,sizeof(tpl_bin*)); /* cp to aligned */
-                    slen = binp->sz;
-                    dv = tpl_cpv(dv,&slen,sizeof(uint32_t));
-                    dv = tpl_cpv(dv,binp->addr,slen);
-                    datav = (void*)((uintptr_t)datav + sizeof(tpl_bin*));
-                    break;
-                case TPL_TYPE_STR:
-                    /* dump the string length followed by the string */
-                    for(i=0; i < c->num; i++) {
-                      memcpy(&strp,datav,sizeof(char*)); /* cp to aligned */
-                      slen = strp ? (strlen(strp)+1) : 0;
-                      dv = tpl_cpv(dv,&slen,sizeof(uint32_t));
-                      if (slen > 1) dv = tpl_cpv(dv,strp,slen-1);
-                      datav = (void*)((uintptr_t)datav + sizeof(char*));
-                    }
-                    break;
-                case TPL_TYPE_ARY:
-                    memcpy(&atypp,datav,sizeof(tpl_atyp*)); /* cp to aligned */
-                    dv = tpl_dump_atyp(c,atypp,dv);
-                    datav = (void*)((uintptr_t)datav + sizeof(void*));
-                    break;
-                case TPL_TYPE_POUND:
-                    /* iterate over the preceding nodes */
-                    pd = (tpl_pound_data*)c->data;
-                    itermax = c->num;
-                    if (++(pd->iternum) < itermax) {
-                      c = pd->iter_start_node;
-                      continue;
-                    } else { /* loop complete. */
-                      pd->iternum = 0;
-                    }
-                    break;
-                default:
-                    tpl_hook.fatal("unsupported format character\n");
-                    break;
-            }
-            c=c->next;
-        }
-    }
-    return dv;
-}
-
-/* figure the serialization output size needed for tpl whose root is n*/
-static size_t tpl_ser_osz(tpl_node *n) {
-    tpl_node *c, *np;
-    size_t sz, itermax;
-    tpl_bin *binp;
-    char *strp;
-    tpl_pound_data *pd;
-    int i;
-
-    /* handle the root node ONLY (subtree's ser_osz have been bubbled-up) */
-    if (n->type != TPL_TYPE_ROOT) {
-        tpl_hook.fatal("internal error: tpl_ser_osz on non-root node\n");
-    }
-
-    sz = n->ser_osz;    /* start with fixed overhead, already stored */
-    c=n->children;
-    while (c) {
-        switch (c->type) {
-            case TPL_TYPE_BYTE:
-            case TPL_TYPE_DOUBLE:
-            case TPL_TYPE_INT32:
-            case TPL_TYPE_UINT32:
-            case TPL_TYPE_INT64:
-            case TPL_TYPE_UINT64:
-            case TPL_TYPE_INT16:
-            case TPL_TYPE_UINT16:
-                sz += tpl_types[c->type].sz * c->num;
-                break;
-            case TPL_TYPE_BIN:
-                sz += sizeof(uint32_t);  /* binary buf len */
-                memcpy(&binp,c->data,sizeof(tpl_bin*)); /* cp to aligned */
-                sz += binp->sz; 
-                break;
-            case TPL_TYPE_STR:
-                for(i=0; i < c->num; i++) {
-                  sz += sizeof(uint32_t);  /* string len */
-                  memcpy(&strp,&((char**)c->data)[i],sizeof(char*)); /* cp to aligned */
-                  sz += strp ? strlen(strp) : 0;
-                }
-                break;
-            case TPL_TYPE_ARY:
-                sz += sizeof(uint32_t);  /* array len */
-                sz += c->ser_osz;        /* bubbled-up child array ser_osz */
-                break;
-            case TPL_TYPE_POUND:
-                /* iterate over the preceding nodes */
-                itermax = c->num;
-                pd = (tpl_pound_data*)c->data;
-                if (++(pd->iternum) < itermax) {
-                  for(np=pd->iter_start_node; np != c; np = np->next) {
-                     np->data = (char*)(np->data) + 
-                                (tpl_types[np->type].sz * np->num);
-                  }
-                  c = pd->iter_start_node;
-                  continue;
-                } else { /* loop complete. */
-                  pd->iternum = 0;
-                  for(np=pd->iter_start_node; np != c; np = np->next) {
-                     np->data = (char*)(np->data) - ((itermax-1) * 
-                                                     tpl_types[np->type].sz * 
-                                                     np->num);
-                  }
-                }
-                break;
-            default:
-                tpl_hook.fatal("unsupported format character\n");
-                break;
-        }
-        c=c->next;
-    }
-    return sz;
-}
-
-
-TPL_API int tpl_dump(tpl_node *r, int mode, ...) {
-    va_list ap;
-    char *filename, *bufv;
-    void **addr_out,*buf, *pa_addr;
-    int fd,rc=0;
-    size_t sz,*sz_out, pa_sz;
-    struct stat sbuf;
-
-    if (((tpl_root_data*)(r->data))->flags & TPL_RDONLY) {  /* unusual */
-        tpl_hook.oops("error: tpl_dump called for a loaded tpl\n");
-        return -1;
-    }
-
-    sz = tpl_ser_osz(r); /* compute the size needed to serialize  */
-
-    va_start(ap,mode);
-    if (mode & TPL_FILE) {
-        filename = va_arg(ap,char*);
-        fd = tpl_mmap_output_file(filename, sz, &buf);
-        if (fd == -1) rc = -1;
-        else {
-            rc = tpl_dump_to_mem(r,buf,sz);
-            if (msync(buf,sz,MS_SYNC) == -1) {
-                tpl_hook.oops("msync failed on fd %d: %s\n", fd, strerror(errno));
-            }
-            if (munmap(buf, sz) == -1) {
-                tpl_hook.oops("munmap failed on fd %d: %s\n", fd, strerror(errno));
-            }
-            close(fd);
-        }
-    } else if (mode & TPL_FD) {
-        fd = va_arg(ap, int);
-        if ( (buf = tpl_hook.malloc(sz)) == NULL) fatal_oom();
-        tpl_dump_to_mem(r,buf,sz);
-        bufv = buf;
-        do {
-            rc = write(fd,bufv,sz);
-            if (rc > 0) {
-                sz -= rc;
-                bufv += rc;
-            } else if (rc == -1) {
-                if (errno == EINTR || errno == EAGAIN) continue;
-                tpl_hook.oops("error writing to fd %d: %s\n", fd, strerror(errno));
-                /* attempt to rewind partial write to a regular file */
-                if (fstat(fd,&sbuf) == 0 && S_ISREG(sbuf.st_mode)) {
-                  if (ftruncate(fd,sbuf.st_size - (bufv-(char*)buf)) == -1) {
-                    tpl_hook.oops("can't rewind: %s\n", strerror(errno));
-                  }
-                }
-                free(buf);
-                return -1;
-            }
-        } while (sz > 0);
-        free(buf);
-        rc = 0;
-    } else if (mode & TPL_MEM) {
-        if (mode & TPL_PREALLOCD) { /* caller allocated */
-          pa_addr = (void*)va_arg(ap, void*);
-          pa_sz = va_arg(ap, size_t);
-          if (pa_sz < sz) {
-              tpl_hook.oops("tpl_dump: buffer too small, need %d bytes\n", sz);
-              return -1;
-          }
-          rc=tpl_dump_to_mem(r,pa_addr,sz);
-        } else { /* we allocate */
-          addr_out = (void**)va_arg(ap, void*);
-          sz_out = va_arg(ap, size_t*);
-          if ( (buf = tpl_hook.malloc(sz)) == NULL) fatal_oom();
-          *sz_out = sz;
-          *addr_out = buf;
-          rc=tpl_dump_to_mem(r,buf,sz);
-        }
-    } else if (mode & TPL_GETSIZE) {
-        sz_out = va_arg(ap, size_t*);
-        *sz_out = sz;
-    } else {
-        tpl_hook.oops("unsupported tpl_dump mode %d\n", mode);
-        rc=-1;
-    }
-    va_end(ap);
-    return rc;
-}
-
-/* This function expects the caller to have set up a memory buffer of 
- * adequate size to hold the serialized tpl. The sz parameter must be
- * the result of tpl_ser_osz(r).
- */
-static int tpl_dump_to_mem(tpl_node *r,void *addr,size_t sz) {
-    uint32_t slen, sz32;
-    int *fxlens, num_fxlens, i;
-    void *dv;
-    char *fmt,flags;
-    tpl_node *c, *np;
-    tpl_pound_data *pd;
-    size_t itermax;
-
-    fmt = tpl_fmt(r);
-    flags = 0;
-    if (tpl_cpu_bigendian()) flags |= TPL_FL_BIGENDIAN;
-    if (strchr(fmt,'s')) flags |= TPL_FL_NULLSTRINGS;
-    sz32 = sz; 
-
-    dv = addr;
-    dv = tpl_cpv(dv,TPL_MAGIC,3);         /* copy tpl magic prefix */
-    dv = tpl_cpv(dv,&flags,1);            /* copy flags byte */
-    dv = tpl_cpv(dv,&sz32,sizeof(uint32_t));/* overall length (inclusive) */
-    dv = tpl_cpv(dv,fmt,strlen(fmt)+1);   /* copy format with NUL-term */
-    fxlens = tpl_fxlens(r,&num_fxlens);
-    dv = tpl_cpv(dv,fxlens,num_fxlens*sizeof(uint32_t));/* fmt # lengths */
-
-    /* serialize the tpl content, iterating over direct children of root */
-    c = r->children;
-    while (c) {
-        switch (c->type) {
-            case TPL_TYPE_BYTE:
-            case TPL_TYPE_DOUBLE:
-            case TPL_TYPE_INT32:
-            case TPL_TYPE_UINT32:
-            case TPL_TYPE_INT64:
-            case TPL_TYPE_UINT64:
-            case TPL_TYPE_INT16:
-            case TPL_TYPE_UINT16:
-                dv = tpl_cpv(dv,c->data,tpl_types[c->type].sz * c->num);
-                break;
-            case TPL_TYPE_BIN:
-                slen = (*(tpl_bin**)(c->data))->sz;
-                dv = tpl_cpv(dv,&slen,sizeof(uint32_t));  /* buffer len */
-                dv = tpl_cpv(dv,(*(tpl_bin**)(c->data))->addr,slen); /* buf */
-                break;
-            case TPL_TYPE_STR:
-                for(i=0; i < c->num; i++) {
-                  char *str = ((char**)c->data)[i];
-                  slen = str ? strlen(str)+1 : 0;
-                  dv = tpl_cpv(dv,&slen,sizeof(uint32_t));  /* string len */
-                  if (slen>1) dv = tpl_cpv(dv,str,slen-1); /*string*/
-                }
-                break;
-            case TPL_TYPE_ARY:
-                dv = tpl_dump_atyp(c,(tpl_atyp*)c->data,dv);
-                break;
-            case TPL_TYPE_POUND:
-                 pd = (tpl_pound_data*)c->data;
-                 itermax = c->num;
-                 if (++(pd->iternum) < itermax) {
-
-                   /* in start or midst of loop. advance data pointers. */
-                   for(np=pd->iter_start_node; np != c; np = np->next) {
-                     np->data = (char*)(np->data) + 
-                                (tpl_types[np->type].sz * np->num);
-                   }
-                   /* do next iteration */
-                   c = pd->iter_start_node;
-                   continue;
-
-                 } else { /* loop complete. */
-                 
-                   /* reset iteration index and addr/data pointers. */
-                   pd->iternum = 0;
-                   for(np=pd->iter_start_node; np != c; np = np->next) {
-                     np->data = (char*)(np->data) - ((itermax-1) * 
-                                                     tpl_types[np->type].sz * 
-                                                     np->num);
-                   }
-
-                 }
-                 break;
-            default:
-                tpl_hook.fatal("unsupported format character\n");
-                break;
-        }
-        c = c->next;
-    }
-
-    return 0;
-}
-
-static int tpl_cpu_bigendian() {
-   unsigned i = 1;
-   char *c;
-   c = (char*)&i;
-   return (c[0] == 1 ? 0 : 1);
-}
-
-
-/*
- * algorithm for sanity-checking a tpl image:
- * scan the tpl whilst not exceeding the buffer size (bufsz) ,
- * formulating a calculated (expected) size of the tpl based
- * on walking its data. When calcsize has been calculated it
- * should exactly match the buffer size (bufsz) and the internal
- * recorded size (intlsz)
- */
-static int tpl_sanity(tpl_node *r, int excess_ok) {
-    uint32_t intlsz;
-    int found_nul=0,rc, octothorpes=0, num_fxlens, *fxlens, flen;
-    void *d, *dv;
-    char intlflags, *fmt, c, *mapfmt;
-    size_t bufsz, serlen;
-
-    d = ((tpl_root_data*)(r->data))->mmap.text;
-    bufsz = ((tpl_root_data*)(r->data))->mmap.text_sz;
-
-    dv = d;
-    if (bufsz < (4 + sizeof(uint32_t) + 1)) return ERR_NOT_MINSIZE; /* min sz: magic+flags+len+nul */
-    if (memcmp(dv,TPL_MAGIC, 3) != 0) return ERR_MAGIC_MISMATCH; /* missing tpl magic prefix */
-    if (tpl_needs_endian_swap(dv)) ((tpl_root_data*)(r->data))->flags |= TPL_XENDIAN;
-    dv = (void*)((uintptr_t)dv + 3);
-    memcpy(&intlflags,dv,sizeof(char));  /* extract flags */
-    if (intlflags & ~TPL_SUPPORTED_BITFLAGS) return ERR_UNSUPPORTED_FLAGS;
-    /* TPL1.3 stores strings with a "length+1" prefix to discern NULL strings from
-       empty strings from non-empty strings; TPL1.2 only handled the latter two. 
-       So we need to be mindful of which string format we're reading from. */
-    if (!(intlflags & TPL_FL_NULLSTRINGS)) {
-      ((tpl_root_data*)(r->data))->flags |= TPL_OLD_STRING_FMT;
-    }
-    dv = (void*)((uintptr_t)dv + 1);
-    memcpy(&intlsz,dv,sizeof(uint32_t));  /* extract internal size */
-    if (((tpl_root_data*)(r->data))->flags & TPL_XENDIAN) tpl_byteswap(&intlsz, sizeof(uint32_t));
-    if (!excess_ok && (intlsz != bufsz)) return ERR_INCONSISTENT_SZ;  /* inconsisent buffer/internal size */
-    dv = (void*)((uintptr_t)dv + sizeof(uint32_t));
-
-    /* dv points to the start of the format string. Look for nul w/in buf sz */
-    fmt = (char*)dv;
-    while ((uintptr_t)dv-(uintptr_t)d < bufsz && !found_nul) {
-        if ( (c = *(char*)dv) != '\0') {
-            if (strchr(tpl_fmt_chars,c) == NULL) 
-               return ERR_FMT_INVALID;  /* invalid char in format string */
-            if ( (c = *(char*)dv) == '#') octothorpes++;
-            dv = (void*)((uintptr_t)dv + 1);
-        }
-        else found_nul = 1;
-    }
-    if (!found_nul) return ERR_FMT_MISSING_NUL;  /* runaway format string */
-    dv = (void*)((uintptr_t)dv + 1);   /* advance to octothorpe lengths buffer */
-    
-    /* compare the map format to the format of this tpl image */
-    mapfmt = tpl_fmt(r);
-    rc = strcmp(mapfmt,fmt);
-    if (rc != 0) return ERR_FMT_MISMATCH; 
-
-    /* compare octothorpe lengths in image to the mapped values */
-    if ((((uintptr_t)dv + (octothorpes * 4)) - (uintptr_t)d) > bufsz) return ERR_INCONSISTENT_SZ4;
-    fxlens = tpl_fxlens(r,&num_fxlens);  /* mapped fxlens */
-    while(num_fxlens--) {
-        memcpy(&flen,dv,sizeof(uint32_t)); /* stored flen */
-        if (((tpl_root_data*)(r->data))->flags & TPL_XENDIAN) tpl_byteswap(&flen, sizeof(uint32_t));
-        if (flen != *fxlens) return ERR_FLEN_MISMATCH;
-        dv = (void*)((uintptr_t)dv + sizeof(uint32_t));
-        fxlens++;
-    }
-
-    /* dv now points to beginning of data */
-    rc = tpl_serlen(r,r,dv,&serlen);  /* get computed serlen of data part */
-    if (rc == -1) return ERR_INCONSISTENT_SZ2; /* internal inconsistency in tpl image */
-    serlen += ((uintptr_t)dv - (uintptr_t)d);   /* add back serlen of preamble part */
-    if (excess_ok && (bufsz < serlen)) return ERR_INCONSISTENT_SZ3;  
-    if (!excess_ok && (serlen != bufsz)) return ERR_INCONSISTENT_SZ3;  /* buffer/internal sz exceeds serlen */
-    return 0;
-}
-
-static void *tpl_find_data_start(void *d) {
-    int octothorpes=0;
-    d = (void*)((uintptr_t)d + 4); /* skip TPL_MAGIC and flags byte */
-    d = (void*)((uintptr_t)d + 4); /* skip int32 overall len */
-    while(*(char*)d != '\0') {
-        if (*(char*)d == '#') octothorpes++;
-        d = (void*)((uintptr_t)d + 1);
-    }
-    d = (void*)((uintptr_t)d +  1);  /* skip NUL */
-    d = (void*)((uintptr_t)d +  (octothorpes * sizeof(uint32_t)));  /* skip # array lens */
-    return d;
-}
-
-static int tpl_needs_endian_swap(void *d) {
-    char *c;
-    int cpu_is_bigendian;
-    c = (char*)d;
-    cpu_is_bigendian = tpl_cpu_bigendian();
-    return ((c[3] & TPL_FL_BIGENDIAN) == cpu_is_bigendian) ? 0 : 1;
-}
-
-static size_t tpl_size_for(char c) {
-  int i;
-  for(i=0; i < sizeof(tpl_types)/sizeof(tpl_types[0]); i++) {
-    if (tpl_types[i].c == c) return tpl_types[i].sz;
-  }
-  return 0;
-}
-
-TPL_API char* tpl_peek(int mode, ...) {
-    va_list ap;
-    int xendian=0,found_nul=0,old_string_format=0;
-    char *filename=NULL, *datapeek_f=NULL, *datapeek_c, *datapeek_s;
-    void *addr=NULL, *dv, *datapeek_p=NULL;
-    size_t sz=0, fmt_len, first_atom, num_fxlens=0;
-    uint32_t datapeek_ssz, datapeek_csz, datapeek_flen;
-    tpl_mmap_rec mr = {0,NULL,0};
-    char *fmt,*fmt_cpy=NULL,c;
-    uint32_t intlsz, **fxlens=NULL, *num_fxlens_out=NULL, *fxlensv;
-
-    va_start(ap,mode);
-    if ((mode & TPL_FXLENS) && (mode & TPL_DATAPEEK)) {
-        tpl_hook.oops("TPL_FXLENS and TPL_DATAPEEK mutually exclusive\n");
-        goto fail;
-    }
-    if (mode & TPL_FILE) filename = va_arg(ap,char *);
-    else if (mode & TPL_MEM) {
-        addr = va_arg(ap,void *);
-        sz = va_arg(ap,size_t);
-    } else {
-        tpl_hook.oops("unsupported tpl_peek mode %d\n", mode);
-        goto fail;
-    }
-    if (mode & TPL_DATAPEEK) {
-        datapeek_f = va_arg(ap, char*);
-    }
-    if (mode & TPL_FXLENS) {
-        num_fxlens_out = va_arg(ap,uint32_t *);
-        fxlens = va_arg(ap,uint32_t **);
-        *num_fxlens_out = 0;
-        *fxlens = NULL;
-    }
-
-    if (mode & TPL_FILE) {
-        if (tpl_mmap_file(filename, &mr) != 0) {
-            tpl_hook.oops("tpl_peek failed for file %s\n", filename);
-            goto fail;
-        }
-        addr = mr.text;
-        sz = mr.text_sz;
-    }
-
-    dv = addr;
-    if (sz < (4 + sizeof(uint32_t) + 1)) goto fail; /* min sz */
-    if (memcmp(dv,TPL_MAGIC, 3) != 0) goto fail; /* missing tpl magic prefix */
-    if (tpl_needs_endian_swap(dv)) xendian=1;
-    if ((((char*)dv)[3] & TPL_FL_NULLSTRINGS)==0) old_string_format=1;
-    dv = (void*)((uintptr_t)dv + 4);
-    memcpy(&intlsz,dv,sizeof(uint32_t));  /* extract internal size */
-    if (xendian) tpl_byteswap(&intlsz, sizeof(uint32_t));
-    if (intlsz != sz) goto fail;  /* inconsisent buffer/internal size */
-    dv = (void*)((uintptr_t)dv + sizeof(uint32_t));
-
-    /* dv points to the start of the format string. Look for nul w/in buf sz */
-    fmt = (char*)dv;
-    while ((uintptr_t)dv-(uintptr_t)addr < sz && !found_nul) {
-        if ( (c = *(char*)dv) == '\0') {
-            found_nul = 1;
-        } else if (c == '#') {
-          num_fxlens++;
-        }
-        dv = (void*)((uintptr_t)dv + 1);
-    }
-    if (!found_nul) goto fail;  /* runaway format string */
-    fmt_len = (char*)dv - fmt;  /* include space for \0 */
-    fmt_cpy = tpl_hook.malloc(fmt_len);
-    if (fmt_cpy == NULL) {
-        fatal_oom();
-    }
-    memcpy(fmt_cpy, fmt, fmt_len);
-
-    /* retrieve the octothorpic lengths if requested */
-    if (num_fxlens > 0) {
-      if (sz < ((uintptr_t)dv + (num_fxlens * sizeof(uint32_t)) - (uintptr_t)addr)) {
-        goto fail;
-      }
-    }
-    if ((mode & TPL_FXLENS) && (num_fxlens > 0)) {
-      *fxlens = tpl_hook.malloc(num_fxlens * sizeof(uint32_t));
-      if (*fxlens == NULL) tpl_hook.fatal("out of memory");
-      *num_fxlens_out = num_fxlens;
-      fxlensv = *fxlens;
-      while(num_fxlens--) {
-          memcpy(fxlensv,dv,sizeof(uint32_t)); 
-          if (xendian) tpl_byteswap(fxlensv, sizeof(uint32_t));
-          dv = (void*)((uintptr_t)dv + sizeof(uint32_t));
-          fxlensv++;
-      }
-    }
-    /* if caller requested, peek into the specified data elements */
-    if (mode & TPL_DATAPEEK) {
-
-       first_atom = strspn(fmt, "S()"); /* skip any leading S() */
-
-       datapeek_flen = strlen(datapeek_f);
-       if (strspn(datapeek_f, tpl_datapeek_ok_chars) < datapeek_flen) {
-         tpl_hook.oops("invalid TPL_DATAPEEK format: %s\n", datapeek_f);
-         tpl_hook.free(fmt_cpy); fmt_cpy = NULL; /* fail */
-         goto fail;
-       }
-
-       if (strncmp( &fmt[first_atom], datapeek_f, datapeek_flen) != 0) {
-         tpl_hook.oops("TPL_DATAPEEK format mismatches tpl iamge\n");
-         tpl_hook.free(fmt_cpy); fmt_cpy = NULL; /* fail */
-         goto fail;
-       }
-
-       /* advance to data start, then copy out requested elements */
-       dv = (void*)((uintptr_t)dv +  (num_fxlens * sizeof(uint32_t)));  
-       for(datapeek_c = datapeek_f; *datapeek_c != '\0'; datapeek_c++) {
-         datapeek_p = va_arg(ap, void*);
-         if (*datapeek_c == 's') {  /* special handling for strings */
-           if ((uintptr_t)dv-(uintptr_t)addr + sizeof(uint32_t) > sz) {
-             tpl_hook.oops("tpl_peek: tpl has insufficient length\n");
-             tpl_hook.free(fmt_cpy); fmt_cpy = NULL; /* fail */
-             goto fail;
-           }
-           memcpy(&datapeek_ssz,dv,sizeof(uint32_t)); /* get slen */
-           if (xendian) tpl_byteswap(&datapeek_ssz, sizeof(uint32_t));
-           if (old_string_format) datapeek_ssz++;
-           dv = (void*)((uintptr_t)dv + sizeof(uint32_t)); /* adv. to str */
-           if (datapeek_ssz == 0) datapeek_s = NULL;
-           else {
-             if ((uintptr_t)dv-(uintptr_t)addr + datapeek_ssz-1 > sz) {
-               tpl_hook.oops("tpl_peek: tpl has insufficient length\n");
-               tpl_hook.free(fmt_cpy); fmt_cpy = NULL; /* fail */
-               goto fail;
-             }
-             datapeek_s = tpl_hook.malloc(datapeek_ssz);
-             if (datapeek_s == NULL) fatal_oom();
-             memcpy(datapeek_s, dv, datapeek_ssz-1);
-             datapeek_s[datapeek_ssz-1] = '\0';
-             dv = (void*)((uintptr_t)dv + datapeek_ssz-1);
-           }
-           *(char**)datapeek_p = datapeek_s;
-         } else {
-           datapeek_csz = tpl_size_for(*datapeek_c);
-           if ((uintptr_t)dv-(uintptr_t)addr + datapeek_csz > sz) {
-             tpl_hook.oops("tpl_peek: tpl has insufficient length\n");
-             tpl_hook.free(fmt_cpy); fmt_cpy = NULL; /* fail */
-             goto fail;
-           }
-           memcpy(datapeek_p, dv, datapeek_csz);
-           if (xendian) tpl_byteswap(datapeek_p, datapeek_csz);
-           dv = (void*)((uintptr_t)dv + datapeek_csz);
-         }
-       }
-    }
-
-fail:
-    va_end(ap);
-    if ((mode & TPL_FILE) && mr.text != NULL) tpl_unmap_file( &mr );
-    return fmt_cpy;
-}
-
-/* tpl_jot(TPL_FILE, "file.tpl", "si", &s, &i); */
-/* tpl_jot(TPL_MEM, &buf, &sz, "si", &s, &i); */
-/* tpl_jot(TPL_FD, fd, "si", &s, &i); */
-TPL_API int tpl_jot(int mode, ...) {
-    va_list ap;
-    char *filename, *fmt;
-    size_t *sz;
-    int fd, rc=0;
-    void **buf;
-    tpl_node *tn;
-
-    va_start(ap,mode);
-    if (mode & TPL_FILE) {
-      filename = va_arg(ap,char*);
-      fmt = va_arg(ap,char*);
-      tn = tpl_map_va(fmt, ap);
-      if (tn == NULL) { rc=-1; goto fail;}
-      tpl_pack(tn, 0);
-      rc = tpl_dump(tn, TPL_FILE, filename);
-      tpl_free(tn);
-    } else if (mode & TPL_MEM) {
-      buf = va_arg(ap,void*);
-      sz = va_arg(ap,size_t*);
-      fmt = va_arg(ap,char*);
-      tn = tpl_map_va(fmt,ap);
-      if (tn == NULL) { rc=-1; goto fail;}
-      tpl_pack(tn,0);
-      rc = tpl_dump(tn, TPL_MEM, buf, sz);
-      tpl_free(tn);
-    } else if (mode & TPL_FD) {
-      fd = va_arg(ap,int);
-      fmt = va_arg(ap,char*);
-      tn = tpl_map_va(fmt,ap);
-      if (tn == NULL) { rc=-1; goto fail;}
-      tpl_pack(tn,0);
-      rc = tpl_dump(tn, TPL_FD, fd);
-      tpl_free(tn);
-    } else {
-      tpl_hook.fatal("invalid tpl_jot mode\n");
-    }
-
-fail:
-    va_end(ap);
-    return rc;
-}
-
-TPL_API int tpl_load(tpl_node *r, int mode, ...) {
-    va_list ap;
-    int rc=0,fd=0;
-    char *filename=NULL;
-    void *addr;
-    size_t sz;
-
-    va_start(ap,mode);
-    if (mode & TPL_FILE) filename = va_arg(ap,char *);
-    else if (mode & TPL_MEM) {
-        addr = va_arg(ap,void *);
-        sz = va_arg(ap,size_t);
-    } else if (mode & TPL_FD) {
-        fd = va_arg(ap,int);
-    } else {
-        tpl_hook.oops("unsupported tpl_load mode %d\n", mode);
-        return -1;
-    }
-    va_end(ap);
-
-    if (r->type != TPL_TYPE_ROOT) {
-        tpl_hook.oops("error: tpl_load to non-root node\n");
-        return -1;
-    }
-    if (((tpl_root_data*)(r->data))->flags & (TPL_WRONLY|TPL_RDONLY)) {
-        /* already packed or loaded, so reset it as if newly mapped */
-        tpl_free_keep_map(r);
-    }
-    if (mode & TPL_FILE) {
-        if (tpl_mmap_file(filename, &((tpl_root_data*)(r->data))->mmap) != 0) {
-            tpl_hook.oops("tpl_load failed for file %s\n", filename);
-            return -1;
-        }
-        if ( (rc = tpl_sanity(r, (mode & TPL_EXCESS_OK))) != 0) {
-            if (rc == ERR_FMT_MISMATCH) {
-                tpl_hook.oops("%s: format signature mismatch\n", filename);
-            } else if (rc == ERR_FLEN_MISMATCH) { 
-                tpl_hook.oops("%s: array lengths mismatch\n", filename);
-            } else { 
-                tpl_hook.oops("%s: not a valid tpl file\n", filename); 
-            }
-            tpl_unmap_file( &((tpl_root_data*)(r->data))->mmap );
-            return -1;
-        }
-        ((tpl_root_data*)(r->data))->flags = (TPL_FILE | TPL_RDONLY);
-    } else if (mode & TPL_MEM) {
-        ((tpl_root_data*)(r->data))->mmap.text = addr;
-        ((tpl_root_data*)(r->data))->mmap.text_sz = sz;
-        if ( (rc = tpl_sanity(r, (mode & TPL_EXCESS_OK))) != 0) {
-            if (rc == ERR_FMT_MISMATCH) {
-                tpl_hook.oops("format signature mismatch\n");
-            } else { 
-                tpl_hook.oops("not a valid tpl file\n"); 
-            }
-            return -1;
-        }
-        ((tpl_root_data*)(r->data))->flags = (TPL_MEM | TPL_RDONLY);
-        if (mode & TPL_UFREE) ((tpl_root_data*)(r->data))->flags |= TPL_UFREE;
-    } else if (mode & TPL_FD) {
-        /* if fd read succeeds, resulting mem img is used for load */
-        if (tpl_gather(TPL_GATHER_BLOCKING,fd,&addr,&sz) > 0) {
-            return tpl_load(r, TPL_MEM|TPL_UFREE, addr, sz);
-        } else return -1;
-    } else {
-        tpl_hook.oops("invalid tpl_load mode %d\n", mode);
-        return -1;
-    }
-    /* this applies to TPL_MEM or TPL_FILE */
-    if (tpl_needs_endian_swap(((tpl_root_data*)(r->data))->mmap.text))
-        ((tpl_root_data*)(r->data))->flags |= TPL_XENDIAN;
-    tpl_unpackA0(r);   /* prepare root A nodes for use */
-    return 0;
-}
-
-TPL_API int tpl_Alen(tpl_node *r, int i) {
-    tpl_node *n;
-
-    n = tpl_find_i(r,i);
-    if (n == NULL) {
-        tpl_hook.oops("invalid index %d to tpl_unpack\n", i);
-        return -1;
-    }
-    if (n->type != TPL_TYPE_ARY) return -1;
-    return ((tpl_atyp*)(n->data))->num;
-}
-
-static void tpl_free_atyp(tpl_node *n, tpl_atyp *atyp) {
-    tpl_backbone *bb,*bbnxt;
-    tpl_node *c;
-    void *dv;
-    tpl_bin *binp;
-    tpl_atyp *atypp;
-    char *strp;
-    size_t itermax;
-    tpl_pound_data *pd;
-    int i;
-
-    bb = atyp->bb;
-    while (bb) {
-        bbnxt = bb->next;
-        dv = bb->data;
-        c=n->children; 
-        while (c) {
-            switch (c->type) {
-                case TPL_TYPE_BYTE:
-                case TPL_TYPE_DOUBLE:
-                case TPL_TYPE_INT32:
-                case TPL_TYPE_UINT32:
-                case TPL_TYPE_INT64:
-                case TPL_TYPE_UINT64:
-                case TPL_TYPE_INT16:
-                case TPL_TYPE_UINT16:
-                    dv = (void*)((uintptr_t)dv + tpl_types[c->type].sz*c->num);
-                    break;
-                case TPL_TYPE_BIN:
-                    memcpy(&binp,dv,sizeof(tpl_bin*)); /* cp to aligned */
-                    if (binp->addr) tpl_hook.free( binp->addr ); /* free buf */
-                    tpl_hook.free(binp);  /* free tpl_bin */
-                    dv = (void*)((uintptr_t)dv + sizeof(tpl_bin*));
-                    break;
-                case TPL_TYPE_STR:
-                    for(i=0; i < c->num; i++) {
-                      memcpy(&strp,dv,sizeof(char*)); /* cp to aligned */
-                      if (strp) tpl_hook.free(strp); /* free string */
-                      dv = (void*)((uintptr_t)dv + sizeof(char*));
-                    }
-                    break;
-                case TPL_TYPE_POUND:
-                    /* iterate over the preceding nodes */
-                    itermax = c->num;
-                    pd = (tpl_pound_data*)c->data;
-                    if (++(pd->iternum) < itermax) {
-                      c = pd->iter_start_node;
-                      continue;
-                    } else { /* loop complete. */
-                      pd->iternum = 0;
-                    }
-                    break;
-                case TPL_TYPE_ARY:
-                    memcpy(&atypp,dv,sizeof(tpl_atyp*)); /* cp to aligned */
-                    tpl_free_atyp(c,atypp);  /* free atyp */
-                    dv = (void*)((uintptr_t)dv + sizeof(void*));
-                    break;
-                default:
-                    tpl_hook.fatal("unsupported format character\n");
-                    break;
-            }
-            c=c->next;
-        }
-        tpl_hook.free(bb);
-        bb = bbnxt;
-    }
-    tpl_hook.free(atyp);
-}
-
-/* determine (by walking) byte length of serialized r/A node at address dv 
- * returns 0 on success, or -1 if the tpl isn't trustworthy (fails consistency)
- */
-static int tpl_serlen(tpl_node *r, tpl_node *n, void *dv, size_t *serlen) {
-    uint32_t slen;
-    int num=0,fidx;
-    tpl_node *c;
-    size_t len=0, alen, buf_past, itermax;
-    tpl_pound_data *pd;
-
-    buf_past = ((uintptr_t)((tpl_root_data*)(r->data))->mmap.text + 
-                      ((tpl_root_data*)(r->data))->mmap.text_sz);
-
-    if (n->type == TPL_TYPE_ROOT) num = 1;
-    else if (n->type == TPL_TYPE_ARY) {
-        if ((uintptr_t)dv + sizeof(uint32_t) > buf_past) return -1;
-        memcpy(&num,dv,sizeof(uint32_t));
-        if (((tpl_root_data*)(r->data))->flags & TPL_XENDIAN)
-             tpl_byteswap(&num, sizeof(uint32_t));
-        dv = (void*)((uintptr_t)dv + sizeof(uint32_t));
-        len += sizeof(uint32_t);
-    } else tpl_hook.fatal("internal error in tpl_serlen\n");
-
-    while (num-- > 0) {
-        c=n->children; 
-        while (c) {
-            switch (c->type) {
-                case TPL_TYPE_BYTE:
-                case TPL_TYPE_DOUBLE:
-                case TPL_TYPE_INT32:
-                case TPL_TYPE_UINT32:
-                case TPL_TYPE_INT64:
-                case TPL_TYPE_UINT64:
-                case TPL_TYPE_INT16:
-                case TPL_TYPE_UINT16:
-                    for(fidx=0; fidx < c->num; fidx++) {  /* octothorpe support */
-                        if ((uintptr_t)dv + tpl_types[c->type].sz > buf_past) return -1;
-                        dv = (void*)((uintptr_t)dv + tpl_types[c->type].sz);
-                        len += tpl_types[c->type].sz;
-                    }
-                    break;
-                case TPL_TYPE_BIN:
-                    len += sizeof(uint32_t);
-                    if ((uintptr_t)dv + sizeof(uint32_t) > buf_past) return -1;
-                    memcpy(&slen,dv,sizeof(uint32_t));
-                    if (((tpl_root_data*)(r->data))->flags & TPL_XENDIAN)
-                        tpl_byteswap(&slen, sizeof(uint32_t));
-                    len += slen;
-                    dv = (void*)((uintptr_t)dv + sizeof(uint32_t));
-                    if ((uintptr_t)dv + slen > buf_past) return -1;
-                    dv = (void*)((uintptr_t)dv + slen);
-                    break;
-                case TPL_TYPE_STR:
-                    for(fidx=0; fidx < c->num; fidx++) {  /* octothorpe support */
-                      len += sizeof(uint32_t);
-                      if ((uintptr_t)dv + sizeof(uint32_t) > buf_past) return -1;
-                      memcpy(&slen,dv,sizeof(uint32_t));
-                      if (((tpl_root_data*)(r->data))->flags & TPL_XENDIAN)
-                          tpl_byteswap(&slen, sizeof(uint32_t));
-                      if (!(((tpl_root_data*)(r->data))->flags & TPL_OLD_STRING_FMT))
-                         slen = (slen>1) ? (slen-1) : 0;
-                      len += slen;
-                      dv = (void*)((uintptr_t)dv + sizeof(uint32_t));
-                      if ((uintptr_t)dv + slen > buf_past) return -1;
-                      dv = (void*)((uintptr_t)dv + slen);
-                    }
-                    break;
-                case TPL_TYPE_ARY:
-                    if ( tpl_serlen(r,c,dv, &alen) == -1) return -1;
-                    dv = (void*)((uintptr_t)dv + alen);
-                    len += alen;
-                    break;
-                case TPL_TYPE_POUND:
-                    /* iterate over the preceding nodes */
-                    itermax = c->num;
-                    pd = (tpl_pound_data*)c->data;
-                    if (++(pd->iternum) < itermax) {
-                      c = pd->iter_start_node;
-                      continue;
-                    } else { /* loop complete. */
-                      pd->iternum = 0;
-                    }
-                    break;
-                default:
-                    tpl_hook.fatal("unsupported format character\n");
-                    break;
-            }
-            c=c->next;
-        }
-    }
-    *serlen = len;
-    return 0;
-}
-
-static int tpl_mmap_output_file(char *filename, size_t sz, void **text_out) {
-    void *text;
-    int fd,perms;
-
-#ifndef _WIN32
-    perms = S_IRUSR|S_IWUSR|S_IWGRP|S_IRGRP|S_IROTH;  /* ug+w o+r */
-    fd=open(filename,O_CREAT|O_TRUNC|O_RDWR,perms);
-#else
-	perms = _S_IWRITE;
-    fd=_open(filename,_O_CREAT|_O_TRUNC|_O_RDWR,perms);
-#endif
-
-    if ( fd == -1 ) {
-        tpl_hook.oops("Couldn't open file %s: %s\n", filename, strerror(errno));
-        return -1;
-    }
-
-    text = mmap(0, sz, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
-    if (text == MAP_FAILED) {
-        tpl_hook.oops("Failed to mmap %s: %s\n", filename, strerror(errno));
-        close(fd);
-        return -1;
-    }
-    if (ftruncate(fd,sz) == -1) {
-        tpl_hook.oops("ftruncate failed: %s\n", strerror(errno));
-        munmap( text, sz );
-        close(fd);
-        return -1;
-    }
-    *text_out = text;
-    return fd;
-}
-
-static int tpl_mmap_file(char *filename, tpl_mmap_rec *mr) {
-    struct stat stat_buf;
-
-    if ( (mr->fd = open(filename, O_RDONLY)) == -1 ) {
-        tpl_hook.oops("Couldn't open file %s: %s\n", filename, strerror(errno));
-        return -1;
-    }
-
-    if ( fstat(mr->fd, &stat_buf) == -1) {
-        close(mr->fd);
-        tpl_hook.oops("Couldn't stat file %s: %s\n", filename, strerror(errno));
-        return -1;
-    }
-
-    mr->text_sz = (size_t)stat_buf.st_size;  
-    mr->text = mmap(0, stat_buf.st_size, PROT_READ, MAP_PRIVATE, mr->fd, 0);
-    if (mr->text == MAP_FAILED) {
-        close(mr->fd);
-        tpl_hook.oops("Failed to mmap %s: %s\n", filename, strerror(errno));
-        return -1;
-    }
-
-    return 0;
-}
-
-TPL_API int tpl_pack(tpl_node *r, int i) {
-    tpl_node *n, *child, *np;
-    void *datav=NULL;
-    size_t sz, itermax;
-    uint32_t slen;
-    char *str;
-    tpl_bin *bin;
-    tpl_pound_data *pd;
-    int fidx;
-
-    n = tpl_find_i(r,i);
-    if (n == NULL) {
-        tpl_hook.oops("invalid index %d to tpl_pack\n", i);
-        return -1;
-    }
-
-    if (((tpl_root_data*)(r->data))->flags & TPL_RDONLY) {
-        /* convert to an writeable tpl, initially empty */
-        tpl_free_keep_map(r);
-    }
-
-    ((tpl_root_data*)(r->data))->flags |= TPL_WRONLY;
-
-    if (n->type == TPL_TYPE_ARY) datav = tpl_extend_backbone(n);
-    child = n->children;
-    while(child) {
-        switch(child->type) {
-            case TPL_TYPE_BYTE:
-            case TPL_TYPE_DOUBLE:
-            case TPL_TYPE_INT32:
-            case TPL_TYPE_UINT32:
-            case TPL_TYPE_INT64:
-            case TPL_TYPE_UINT64:
-            case TPL_TYPE_INT16:
-            case TPL_TYPE_UINT16:
-                /* no need to use fidx iteration here; we can copy multiple values in one memcpy */
-                memcpy(child->data,child->addr,tpl_types[child->type].sz * child->num);
-                if (datav) datav = tpl_cpv(datav,child->data,tpl_types[child->type].sz * child->num);
-                if (n->type == TPL_TYPE_ARY) n->ser_osz += tpl_types[child->type].sz * child->num;
-                break;
-            case TPL_TYPE_BIN:
-                /* copy the buffer to be packed */ 
-                slen = ((tpl_bin*)child->addr)->sz;
-                if (slen >0) {
-                    str = tpl_hook.malloc(slen);
-                    if (!str) fatal_oom();
-                    memcpy(str,((tpl_bin*)child->addr)->addr,slen);
-                } else str = NULL;
-                /* and make a tpl_bin to point to it */
-                bin = tpl_hook.malloc(sizeof(tpl_bin));
-                if (!bin) fatal_oom();
-                bin->addr = str;
-                bin->sz = slen;
-                /* now pack its pointer, first deep freeing any pre-existing bin */
-                if (*(tpl_bin**)(child->data) != NULL) {
-                    if ((*(tpl_bin**)(child->data))->sz != 0) {
-                            tpl_hook.free( (*(tpl_bin**)(child->data))->addr );
-                    }
-                    tpl_hook.free(*(tpl_bin**)(child->data));  
-                }
-                memcpy(child->data,&bin,sizeof(tpl_bin*));
-                if (datav) {
-                    datav = tpl_cpv(datav, &bin, sizeof(tpl_bin*));
-                    *(tpl_bin**)(child->data) = NULL;  
-                }
-                if (n->type == TPL_TYPE_ARY) {
-                    n->ser_osz += sizeof(uint32_t); /* binary buf len word */
-                    n->ser_osz += bin->sz;          /* binary buf */
-                }
-                break;
-            case TPL_TYPE_STR:
-                for(fidx=0; fidx < child->num; fidx++) {
-                  /* copy the string to be packed. slen includes \0. this 
-                     block also works if the string pointer is NULL. */
-                  char *caddr = ((char**)child->addr)[fidx];
-                  char **cdata = &((char**)child->data)[fidx];
-                  slen = caddr ?  (strlen(caddr) + 1) : 0;
-                  if (slen) {
-                    str = tpl_hook.malloc(slen);
-                    if (!str) fatal_oom();
-                    memcpy(str,caddr,slen); /* include \0 */
-                  } else {
-                    str = NULL;
-                  } 
-                  /* now pack its pointer, first freeing any pre-existing string */
-                  if (*cdata != NULL) {
-                      tpl_hook.free(*cdata);  
-                  }
-                  memcpy(cdata,&str,sizeof(char*));
-                  if (datav) {
-                      datav = tpl_cpv(datav, &str, sizeof(char*));
-                      *cdata = NULL;  
-                  }
-                  if (n->type == TPL_TYPE_ARY) {
-                      n->ser_osz += sizeof(uint32_t); /* string len word */
-                      if (slen>1) n->ser_osz += slen-1;/* string (without nul) */
-                  }
-                }
-                break;
-            case TPL_TYPE_ARY:
-                /* copy the child's tpl_atype* and reset it to empty */
-                if (datav) {
-                    sz = ((tpl_atyp*)(child->data))->sz;
-                    datav = tpl_cpv(datav, &child->data, sizeof(void*));
-                    child->data = tpl_hook.malloc(sizeof(tpl_atyp));
-                    if (!child->data) fatal_oom();
-                    ((tpl_atyp*)(child->data))->num = 0;
-                    ((tpl_atyp*)(child->data))->sz = sz;
-                    ((tpl_atyp*)(child->data))->bb = NULL;
-                    ((tpl_atyp*)(child->data))->bbtail = NULL;
-                }
-                /* parent is array? then bubble up child array's ser_osz */
-                if (n->type == TPL_TYPE_ARY) {
-                    n->ser_osz += sizeof(uint32_t); /* array len word */
-                    n->ser_osz += child->ser_osz;   /* child array ser_osz */
-                    child->ser_osz = 0;             /* reset child array ser_osz */
-                }
-                break;
-
-            case TPL_TYPE_POUND: 
-                /* we need to iterate n times over preceding nodes in S(...). 
-                 * we may be in the midst of an iteration each time or starting. */
-                 pd = (tpl_pound_data*)child->data;
-                 itermax = child->num;
-
-                 /* itermax is total num of iterations needed  */
-                 /* pd->iternum is current iteration index  */
-                 /* pd->inter_elt_len is element-to-element len of contiguous structs */
-                 /* pd->iter_start_node is where we jump to at each iteration. */
-
-                 if (++(pd->iternum) < itermax) {
-
-                   /* in start or midst of loop. advance addr/data pointers. */
-                   for(np=pd->iter_start_node; np != child; np = np->next) {
-                     np->data = (char*)(np->data) + 
-                          (tpl_types[np->type].sz * np->num);
-                     np->addr = (char*)(np->addr) + pd->inter_elt_len;
-                   }
-                   /* do next iteration */
-                   child = pd->iter_start_node;
-                   continue;
-
-                 } else { /* loop complete. */
-                 
-                   /* reset iteration index and addr/data pointers. */
-                   pd->iternum = 0;
-                   for(np=pd->iter_start_node; np != child; np = np->next) {
-                     np->data = (char*)(np->data) - ((itermax-1) *
-                                                      tpl_types[np->type].sz * 
-                                                      np->num);
-                     np->addr = (char*)(np->addr) - ((itermax-1) * pd->inter_elt_len);
-                   }
-
-                 }
-                break;
-            default:
-                tpl_hook.fatal("unsupported format character\n");
-                break;
-        }
-        child=child->next;
-    }
-    return 0;
-}
-
-TPL_API int tpl_unpack(tpl_node *r, int i) {
-    tpl_node *n, *c, *np;
-    uint32_t slen;
-    int rc=1, fidx;
-    char *str;
-    void *dv=NULL, *caddr;
-    size_t A_bytes, itermax;
-    tpl_pound_data *pd;
-    void *img;
-    size_t sz;
-
-
-    /* handle unusual case of tpl_pack,tpl_unpack without an 
-     * intervening tpl_dump. do a dump/load implicitly. */
-    if (((tpl_root_data*)(r->data))->flags & TPL_WRONLY) {
-        if (tpl_dump(r,TPL_MEM,&img,&sz) != 0) return -1;
-        if (tpl_load(r,TPL_MEM|TPL_UFREE,img,sz) != 0) {
-            tpl_hook.free(img);
-            return -1;
-        };
-    }
-
-    n = tpl_find_i(r,i);
-    if (n == NULL) {
-        tpl_hook.oops("invalid index %d to tpl_unpack\n", i);
-        return -1;
-    }
-
-    /* either root node or an A node */
-    if (n->type == TPL_TYPE_ROOT) {
-        dv = tpl_find_data_start( ((tpl_root_data*)(n->data))->mmap.text );
-    } else if (n->type == TPL_TYPE_ARY) {
-        if (((tpl_atyp*)(n->data))->num <= 0) return 0; /* array consumed */
-        else rc = ((tpl_atyp*)(n->data))->num--;
-        dv = ((tpl_atyp*)(n->data))->cur;
-        if (!dv) tpl_hook.fatal("must unpack parent of node before node itself\n");
-    }
-
-    c = n->children;
-    while (c) {
-        switch (c->type) {
-            case TPL_TYPE_BYTE:
-            case TPL_TYPE_DOUBLE:
-            case TPL_TYPE_INT32:
-            case TPL_TYPE_UINT32:
-            case TPL_TYPE_INT64:
-            case TPL_TYPE_UINT64:
-            case TPL_TYPE_INT16:
-            case TPL_TYPE_UINT16:
-                /* unpack elements of cross-endian octothorpic array individually */
-                if (((tpl_root_data*)(r->data))->flags & TPL_XENDIAN) {
-                    for(fidx=0; fidx < c->num; fidx++) {
-                        caddr = (void*)((uintptr_t)c->addr + (fidx * tpl_types[c->type].sz));
-                        memcpy(caddr,dv,tpl_types[c->type].sz);
-                        tpl_byteswap(caddr, tpl_types[c->type].sz);
-                        dv = (void*)((uintptr_t)dv + tpl_types[c->type].sz);
-                    }
-                } else {
-                    /* bulk unpack ok if not cross-endian */
-                    memcpy(c->addr, dv, tpl_types[c->type].sz * c->num);
-                    dv = (void*)((uintptr_t)dv + tpl_types[c->type].sz * c->num);
-                }
-                break;
-            case TPL_TYPE_BIN:
-                memcpy(&slen,dv,sizeof(uint32_t));
-                if (((tpl_root_data*)(r->data))->flags & TPL_XENDIAN)
-                    tpl_byteswap(&slen, sizeof(uint32_t));
-                if (slen > 0) {
-                    str = (char*)tpl_hook.malloc(slen);
-                    if (!str) fatal_oom();
-                } else str=NULL;
-                dv = (void*)((uintptr_t)dv + sizeof(uint32_t));
-                if (slen>0) memcpy(str,dv,slen);
-                memcpy(&(((tpl_bin*)c->addr)->addr),&str,sizeof(void*));
-                memcpy(&(((tpl_bin*)c->addr)->sz),&slen,sizeof(uint32_t));
-                dv = (void*)((uintptr_t)dv + slen);
-                break;
-            case TPL_TYPE_STR:
-                for(fidx=0; fidx < c->num; fidx++) {
-                  memcpy(&slen,dv,sizeof(uint32_t));
-                  if (((tpl_root_data*)(r->data))->flags & TPL_XENDIAN)
-                      tpl_byteswap(&slen, sizeof(uint32_t));
-                  if (((tpl_root_data*)(r->data))->flags & TPL_OLD_STRING_FMT)
-                    slen += 1;
-                  dv = (void*)((uintptr_t)dv + sizeof(uint32_t));
-                  if (slen) {  /* slen includes \0 */
-                    str = (char*)tpl_hook.malloc(slen);
-                    if (!str) fatal_oom();
-                    if (slen>1) memcpy(str,dv,slen-1);
-                    str[slen-1] = '\0'; /* nul terminate */
-                    dv = (void*)((uintptr_t)dv + slen-1);
-                  } else str=NULL;
-                  memcpy(&((char**)c->addr)[fidx],&str,sizeof(char*));
-                }
-                break;
-            case TPL_TYPE_POUND:
-                /* iterate over preceding nodes */
-                pd = (tpl_pound_data*)c->data;
-                itermax = c->num;
-                if (++(pd->iternum) < itermax) {
-                  /* in start or midst of loop. advance addr/data pointers. */
-                  for(np=pd->iter_start_node; np != c; np = np->next) {
-                    np->addr = (char*)(np->addr) + pd->inter_elt_len;
-                  }
-                  /* do next iteration */
-                  c = pd->iter_start_node;
-                  continue;
-
-                } else { /* loop complete. */
-                
-                  /* reset iteration index and addr/data pointers. */
-                  pd->iternum = 0;
-                  for(np=pd->iter_start_node; np != c; np = np->next) {
-                    np->addr = (char*)(np->addr) - ((itermax-1) * pd->inter_elt_len);
-                  }
-
-                }
-                break;
-            case TPL_TYPE_ARY:
-                if (tpl_serlen(r,c,dv, &A_bytes) == -1) 
-                    tpl_hook.fatal("internal error in unpack\n");
-                memcpy( &((tpl_atyp*)(c->data))->num, dv, sizeof(uint32_t));
-                if (((tpl_root_data*)(r->data))->flags & TPL_XENDIAN)
-                    tpl_byteswap(&((tpl_atyp*)(c->data))->num, sizeof(uint32_t));
-                ((tpl_atyp*)(c->data))->cur = (void*)((uintptr_t)dv+sizeof(uint32_t));
-                dv = (void*)((uintptr_t)dv + A_bytes);
-                break;
-            default:
-                tpl_hook.fatal("unsupported format character\n");
-                break;
-        }
-
-        c = c->next;
-    }
-    if (n->type == TPL_TYPE_ARY) ((tpl_atyp*)(n->data))->cur = dv; /* next element */
-    return rc;
-}
-
-/* Specialized function that unpacks only the root's A nodes, after tpl_load  */
-static int tpl_unpackA0(tpl_node *r) {
-    tpl_node *n, *c;
-    uint32_t slen;
-    int rc=1,fidx,i;
-    void *dv;
-    size_t A_bytes, itermax;
-    tpl_pound_data *pd;
-
-    n = r;
-    dv = tpl_find_data_start( ((tpl_root_data*)(r->data))->mmap.text);
-
-    c=n->children;
-    while (c)  {
-        switch (c->type) {
-            case TPL_TYPE_BYTE:
-            case TPL_TYPE_DOUBLE:
-            case TPL_TYPE_INT32:
-            case TPL_TYPE_UINT32:
-            case TPL_TYPE_INT64:
-            case TPL_TYPE_UINT64:
-            case TPL_TYPE_INT16:
-            case TPL_TYPE_UINT16:
-                for(fidx=0;fidx < c->num; fidx++) {
-                    dv = (void*)((uintptr_t)dv + tpl_types[c->type].sz);
-                }
-                break;
-            case TPL_TYPE_BIN:
-                memcpy(&slen,dv,sizeof(uint32_t));
-                if (((tpl_root_data*)(r->data))->flags & TPL_XENDIAN)
-                    tpl_byteswap(&slen, sizeof(uint32_t));
-                dv = (void*)((uintptr_t)dv + sizeof(uint32_t));
-                dv = (void*)((uintptr_t)dv + slen);
-                break;
-            case TPL_TYPE_STR:
-                for(i=0; i<c->num; i++) {
-                  memcpy(&slen,dv,sizeof(uint32_t));
-                  if (((tpl_root_data*)(r->data))->flags & TPL_XENDIAN)
-                      tpl_byteswap(&slen, sizeof(uint32_t));
-                  if (((tpl_root_data*)(r->data))->flags & TPL_OLD_STRING_FMT)
-                    slen += 1;
-                  dv = (void*)((uintptr_t)dv + sizeof(uint32_t));
-                  if (slen>1) dv = (void*)((uintptr_t)dv + slen-1);
-                }
-                break;
-            case TPL_TYPE_POUND:
-                /* iterate over the preceding nodes */
-                itermax = c->num;
-                pd = (tpl_pound_data*)c->data;
-                if (++(pd->iternum) < itermax) {
-                  c = pd->iter_start_node;
-                  continue;
-                } else { /* loop complete. */
-                  pd->iternum = 0;
-                }
-                break;
-            case TPL_TYPE_ARY:
-                if ( tpl_serlen(r,c,dv, &A_bytes) == -1) 
-                    tpl_hook.fatal("internal error in unpackA0\n");
-                memcpy( &((tpl_atyp*)(c->data))->num, dv, sizeof(uint32_t));
-                if (((tpl_root_data*)(r->data))->flags & TPL_XENDIAN)
-                    tpl_byteswap(&((tpl_atyp*)(c->data))->num, sizeof(uint32_t));
-                ((tpl_atyp*)(c->data))->cur = (void*)((uintptr_t)dv+sizeof(uint32_t));
-                dv = (void*)((uintptr_t)dv + A_bytes);
-                break;
-            default:
-                tpl_hook.fatal("unsupported format character\n");
-                break;
-        }
-        c=c->next;
-    }
-    return rc;
-}
-
-/* In-place byte order swapping of a word of length "len" bytes */
-static void tpl_byteswap(void *word, int len) {
-    int i;
-    char c, *w;
-    w = (char*)word;
-    for(i=0; i<len/2; i++) {
-        c = w[i];
-        w[i] = w[len-1-i];
-        w[len-1-i] = c;
-    }
-}
-
-static void tpl_fatal(const char *fmt, ...) {
-    va_list ap;
-    char exit_msg[100];
-
-    va_start(ap,fmt);
-    vsnprintf(exit_msg, 100, fmt, ap);
-    va_end(ap);
-
-    tpl_hook.oops("%s", exit_msg);
-    exit(-1);
-}
-
-TPL_API int tpl_gather(int mode, ...) {
-    va_list ap;
-    int fd,rc=0;
-    size_t *szp,sz;
-    void **img,*addr,*data;
-    tpl_gather_t **gs;
-    tpl_gather_cb *cb;
-
-    va_start(ap,mode);
-    switch (mode) {
-        case TPL_GATHER_BLOCKING:
-            fd = va_arg(ap,int);
-            img = va_arg(ap,void*);
-            szp = va_arg(ap,size_t*);
-            rc = tpl_gather_blocking(fd,img,szp);
-            break;
-        case TPL_GATHER_NONBLOCKING:
-            fd = va_arg(ap,int);
-            gs = (tpl_gather_t**)va_arg(ap,void*);
-            cb = (tpl_gather_cb*)va_arg(ap,tpl_gather_cb*);
-            data = va_arg(ap,void*);
-            rc = tpl_gather_nonblocking(fd,gs,cb,data);
-            break;
-        case TPL_GATHER_MEM:
-            addr = va_arg(ap,void*);
-            sz = va_arg(ap,size_t);
-            gs = (tpl_gather_t**)va_arg(ap,void*);
-            cb = (tpl_gather_cb*)va_arg(ap,tpl_gather_cb*);
-            data = va_arg(ap,void*);
-            rc = tpl_gather_mem(addr,sz,gs,cb,data);
-            break;
-        default:
-            tpl_hook.fatal("unsupported tpl_gather mode %d\n",mode);
-            break;
-    }
-    va_end(ap);
-    return rc;
-}
-
-/* dequeue a tpl by reading until one full tpl image is obtained.
- * We take care not to read past the end of the tpl.
- * This is intended as a blocking call i.e. for use with a blocking fd.
- * It can be given a non-blocking fd, but the read spins if we have to wait.
- */
-static int tpl_gather_blocking(int fd, void **img, size_t *sz) {
-    char preamble[8];
-    int i=0, rc;
-    uint32_t tpllen;
-
-    do { 
-        rc = read(fd,&preamble[i],8-i);
-        i += (rc>0) ? rc : 0;
-    } while ((rc==-1 && (errno==EINTR||errno==EAGAIN)) || (rc>0 && i<8));
-
-    if (rc<0) {
-        tpl_hook.oops("tpl_gather_fd_blocking failed: %s\n", strerror(errno));
-        return -1;
-    } else if (rc == 0) {
-        /* tpl_hook.oops("tpl_gather_fd_blocking: eof\n"); */
-        return 0;
-    } else if (i != 8) {
-        tpl_hook.oops("internal error\n");
-        return -1;
-    }
-
-    if (preamble[0] == 't' && preamble[1] == 'p' && preamble[2] == 'l') {
-        memcpy(&tpllen,&preamble[4],4);
-        if (tpl_needs_endian_swap(preamble)) tpl_byteswap(&tpllen,4);
-    } else {
-        tpl_hook.oops("tpl_gather_fd_blocking: non-tpl input\n");
-        return -1;
-    }
-
-    /* malloc space for remainder of tpl image (overall length tpllen) 
-     * and read it in
-     */
-    if (tpl_hook.gather_max > 0 && 
-        tpllen > tpl_hook.gather_max) {
-        tpl_hook.oops("tpl exceeds max length %d\n", 
-            tpl_hook.gather_max);
-        return -2;
-    }
-    *sz = tpllen;
-    if ( (*img = tpl_hook.malloc(tpllen)) == NULL) {
-        fatal_oom();
-    }
-
-    memcpy(*img,preamble,8);  /* copy preamble to output buffer */
-    i=8;
-    do { 
-        rc = read(fd,&((*(char**)img)[i]),tpllen-i);
-        i += (rc>0) ? rc : 0;
-    } while ((rc==-1 && (errno==EINTR||errno==EAGAIN)) || (rc>0 && i<tpllen));
-
-    if (rc<0) {
-        tpl_hook.oops("tpl_gather_fd_blocking failed: %s\n", strerror(errno));
-        tpl_hook.free(*img);
-        return -1;
-    } else if (rc == 0) {
-        /* tpl_hook.oops("tpl_gather_fd_blocking: eof\n"); */
-        tpl_hook.free(*img);
-        return 0;
-    } else if (i != tpllen) {
-        tpl_hook.oops("internal error\n");
-        tpl_hook.free(*img);
-        return -1;
-    }
-
-    return 1;
-}
-
-/* Used by select()-driven apps which want to gather tpl images piecemeal */
-/* the file descriptor must be non-blocking for this functino to work. */
-static int tpl_gather_nonblocking( int fd, tpl_gather_t **gs, tpl_gather_cb *cb, void *data) {
-    char buf[TPL_GATHER_BUFLEN], *img, *tpl;
-    int rc, keep_looping, cbrc=0;
-    size_t catlen;
-    uint32_t tpllen;
-
-    while (1) {
-        rc = read(fd,buf,TPL_GATHER_BUFLEN);
-        if (rc == -1) {
-            if (errno == EINTR) continue;  /* got signal during read, ignore */
-            if (errno == EAGAIN) return 1; /* nothing to read right now */
-            else {
-                tpl_hook.oops("tpl_gather failed: %s\n", strerror(errno));
-                if (*gs) {
-                    tpl_hook.free((*gs)->img);
-                    tpl_hook.free(*gs);
-                    *gs = NULL;
-                }
-                return -1;                 /* error, caller should close fd  */
-            }
-        } else if (rc == 0) {
-            if (*gs) {
-                tpl_hook.oops("tpl_gather: partial tpl image precedes EOF\n");
-                tpl_hook.free((*gs)->img);
-                tpl_hook.free(*gs);
-                *gs = NULL;
-            }
-            return 0;                      /* EOF, caller should close fd */
-        } else {
-            /* concatenate any partial tpl from last read with new buffer */
-            if (*gs) {
-                catlen = (*gs)->len + rc;
-                if (tpl_hook.gather_max > 0 && 
-                    catlen > tpl_hook.gather_max) {
-                    tpl_hook.free( (*gs)->img );
-                    tpl_hook.free( (*gs) );
-                    *gs = NULL;
-                    tpl_hook.oops("tpl exceeds max length %d\n", 
-                        tpl_hook.gather_max);
-                    return -2;              /* error, caller should close fd */
-                }
-                if ( (img = tpl_hook.realloc((*gs)->img, catlen)) == NULL) {
-                    fatal_oom();
-                }
-                memcpy(img + (*gs)->len, buf, rc);
-                tpl_hook.free(*gs);
-                *gs = NULL;
-            } else {
-                img = buf;
-                catlen = rc;
-            }
-            /* isolate any full tpl(s) in img and invoke cb for each */
-            tpl = img;
-            keep_looping = (tpl+8 < img+catlen) ? 1 : 0;
-            while (keep_looping) {
-                if (strncmp("tpl", tpl, 3) != 0) {
-                    tpl_hook.oops("tpl prefix invalid\n");
-                    if (img != buf) tpl_hook.free(img);
-                    tpl_hook.free(*gs);
-                    *gs = NULL;
-                    return -3; /* error, caller should close fd */
-                }
-                memcpy(&tpllen,&tpl[4],4);
-                if (tpl_needs_endian_swap(tpl)) tpl_byteswap(&tpllen,4);
-                if (tpl+tpllen <= img+catlen) {
-                    cbrc = (cb)(tpl,tpllen,data);  /* invoke cb for tpl image */
-                    tpl += tpllen;                 /* point to next tpl image */
-                    if (cbrc < 0) keep_looping = 0;
-                    else keep_looping = (tpl+8 < img+catlen) ? 1 : 0;
-                } else keep_looping=0;
-            } 
-            /* check if app callback requested closure of tpl source */
-            if (cbrc < 0) {
-                tpl_hook.oops("tpl_fd_gather aborted by app callback\n");
-                if (img != buf) tpl_hook.free(img);
-                if (*gs) tpl_hook.free(*gs);
-                *gs = NULL;
-                return -4;
-            }
-            /* store any leftover, partial tpl fragment for next read */
-            if (tpl == img && img != buf) {  
-                /* consumed nothing from img!=buf */
-                if ( (*gs = tpl_hook.malloc(sizeof(tpl_gather_t))) == NULL ) {
-                    fatal_oom();
-                }
-                (*gs)->img = tpl;
-                (*gs)->len = catlen;
-            } else if (tpl < img+catlen) {  
-                /* consumed 1+ tpl(s) from img!=buf or 0 from img==buf */
-                if ( (*gs = tpl_hook.malloc(sizeof(tpl_gather_t))) == NULL ) {
-                    fatal_oom();
-                }
-                if ( ((*gs)->img = tpl_hook.malloc(img+catlen - tpl)) == NULL ) {
-                    fatal_oom();
-                }
-                (*gs)->len = img+catlen - tpl;
-                memcpy( (*gs)->img, tpl, img+catlen - tpl);
-                /* free partially consumed concat buffer if used */
-                if (img != buf) tpl_hook.free(img); 
-            } else {                        /* tpl(s) fully consumed */
-                /* free consumed concat buffer if used */
-                if (img != buf) tpl_hook.free(img); 
-            }
-        }
-    } 
-}
-
-/* gather tpl piecemeal from memory buffer (not fd) e.g., from a lower-level api */
-static int tpl_gather_mem( char *buf, size_t len, tpl_gather_t **gs, tpl_gather_cb *cb, void *data) {
-    char *img, *tpl;
-    int keep_looping, cbrc=0;
-    size_t catlen;
-    uint32_t tpllen;
-
-    /* concatenate any partial tpl from last read with new buffer */
-    if (*gs) {
-        catlen = (*gs)->len + len;
-        if (tpl_hook.gather_max > 0 && 
-            catlen > tpl_hook.gather_max) {
-            tpl_hook.free( (*gs)->img );
-            tpl_hook.free( (*gs) );
-            *gs = NULL;
-            tpl_hook.oops("tpl exceeds max length %d\n", 
-                tpl_hook.gather_max);
-            return -2;              /* error, caller should stop accepting input from source*/
-        }
-        if ( (img = tpl_hook.realloc((*gs)->img, catlen)) == NULL) {
-            fatal_oom();
-        }
-        memcpy(img + (*gs)->len, buf, len);
-        tpl_hook.free(*gs);
-        *gs = NULL;
-    } else {
-        img = buf;
-        catlen = len;
-    }
-    /* isolate any full tpl(s) in img and invoke cb for each */
-    tpl = img;
-    keep_looping = (tpl+8 < img+catlen) ? 1 : 0;
-    while (keep_looping) {
-        if (strncmp("tpl", tpl, 3) != 0) {
-            tpl_hook.oops("tpl prefix invalid\n");
-            if (img != buf) tpl_hook.free(img);
-            tpl_hook.free(*gs);
-            *gs = NULL;
-            return -3; /* error, caller should stop accepting input from source*/
-        }
-        memcpy(&tpllen,&tpl[4],4);
-        if (tpl_needs_endian_swap(tpl)) tpl_byteswap(&tpllen,4);
-        if (tpl+tpllen <= img+catlen) {
-            cbrc = (cb)(tpl,tpllen,data);  /* invoke cb for tpl image */
-            tpl += tpllen;               /* point to next tpl image */
-            if (cbrc < 0) keep_looping = 0;
-            else keep_looping = (tpl+8 < img+catlen) ? 1 : 0;
-        } else keep_looping=0;
-    } 
-    /* check if app callback requested closure of tpl source */
-    if (cbrc < 0) {
-        tpl_hook.oops("tpl_mem_gather aborted by app callback\n");
-        if (img != buf) tpl_hook.free(img);
-        if (*gs) tpl_hook.free(*gs);
-        *gs = NULL;
-        return -4;
-    }
-    /* store any leftover, partial tpl fragment for next read */
-    if (tpl == img && img != buf) {  
-        /* consumed nothing from img!=buf */
-        if ( (*gs = tpl_hook.malloc(sizeof(tpl_gather_t))) == NULL ) {
-            fatal_oom();
-        }
-        (*gs)->img = tpl;
-        (*gs)->len = catlen;
-    } else if (tpl < img+catlen) {  
-        /* consumed 1+ tpl(s) from img!=buf or 0 from img==buf */
-        if ( (*gs = tpl_hook.malloc(sizeof(tpl_gather_t))) == NULL ) {
-            fatal_oom();
-        }
-        if ( ((*gs)->img = tpl_hook.malloc(img+catlen - tpl)) == NULL ) {
-            fatal_oom();
-        }
-        (*gs)->len = img+catlen - tpl;
-        memcpy( (*gs)->img, tpl, img+catlen - tpl);
-        /* free partially consumed concat buffer if used */
-        if (img != buf) tpl_hook.free(img); 
-    } else {                        /* tpl(s) fully consumed */
-        /* free consumed concat buffer if used */
-        if (img != buf) tpl_hook.free(img); 
-    }
-    return 1;
-}

ext/lmdb

@@ -0,0 +1 @@
+Subproject commit 5033a08c86fb6ef0adddabad327422a1c0c0069a

ext/spookyhash

@@ -0,0 +1 @@
+Subproject commit 7192ad29f34ba59863d57d7817a54c57146b5e90

ext/tpl

@@ -0,0 +1 @@
+Subproject commit a6d734c90069cb19fd347c559bcd7e827e688cf9

lakesuperior/__init__.py

@@ -4,7 +4,7 @@ from os import path
 
 
 version = '1.0 alpha'
-release = '1.0.0a19'
+release = '1.0.0a20'
 
 basedir = path.dirname(path.realpath(__file__))
 """

lakesuperior/api/admin.py

@@ -1,7 +1,11 @@
+import hashlib
 import logging
 
 from lakesuperior import env
 from lakesuperior.config_parser import parse_config
+from lakesuperior.dictionaries.namespaces import ns_collection as nsc
+from lakesuperior.exceptions import (
+        ChecksumValidationError, IncompatibleLdpTypeError)
 from lakesuperior.migrator import Migrator
 from lakesuperior.store.ldp_nr.default_layout import DefaultLayout as FileLayout
 
@@ -54,3 +58,40 @@ def integrity_check():
     """
     with env.app_globals.rdfly.store.txn_ctx():
         return set(env.app_globals.rdfly.find_refint_violations())
+
+
+def fixity_check(uid):
+    """
+    Check fixity of a resource.
+
+    This calculates the checksum of a resource and validates it against the
+    checksum stored in its metadata (``premis:hasMessageDigest``).
+
+    :param str uid: UID of the resource to be checked.
+
+    :rtype: None
+
+    :raises: lakesuperior.exceptions.ChecksumValidationError: the cecksums
+        do not match. This indicates corruption.
+    :raises: lakesuperior.exceptions.IncompatibleLdpTypeError: if the
+        resource is not an LDP-NR.
+    """
+    from lakesuperior.api import resource as rsrc_api
+    from lakesuperior.model.ldp.ldp_factory import LDP_NR_TYPE
+
+    rsrc = rsrc_api.get(uid)
+    with env.app_globals.rdf_store.txn_ctx():
+        if LDP_NR_TYPE not in rsrc.ldp_types:
+            raise IncompatibleLdpTypeError()
+
+        ref_digest_term = rsrc.metadata.value(nsc['premis'].hasMessageDigest)
+        ref_digest_parts = ref_digest_term.split(':')
+        ref_cksum = ref_digest_parts[-1]
+        ref_cksum_algo = ref_digest_parts[-2]
+
+        calc_cksum = hashlib.new(ref_cksum_algo, rsrc.content.read()).hexdigest()
+
+    if calc_cksum != ref_cksum:
+        raise ChecksumValidationError(uid, ref_cksum, calc_cksum)
+
+    logger.info(f'Fixity check passed for {uid}.')

lakesuperior/api/resource.py

@@ -7,7 +7,7 @@ from threading import Lock, Thread
 
 import arrow
 
-from rdflib import Graph, Literal, URIRef
+from rdflib import Literal
 from rdflib.namespace import XSD
 
 from lakesuperior.config_parser import config
@@ -15,8 +15,7 @@ from lakesuperior.exceptions import (
         InvalidResourceError, ResourceNotExistsError, TombstoneError)
 from lakesuperior import env, thread_env
 from lakesuperior.globals import RES_DELETED, RES_UPDATED
-from lakesuperior.model.ldp_factory import LDP_NR_TYPE, LdpFactory
-from lakesuperior.store.ldp_rs.lmdb_triplestore import SimpleGraph
+from lakesuperior.model.ldp.ldp_factory import LDP_NR_TYPE, LdpFactory
 
 
 logger = logging.getLogger(__name__)
@@ -24,36 +23,36 @@ logger = logging.getLogger(__name__)
 __doc__ = """
 Primary API for resource manipulation.
 
-Quickstart:
-
->>> # First import default configuration and globals—only done once.
->>> import lakesuperior.default_env
->>> from lakesuperior.api import resource
->>> # Get root resource.
->>> rsrc = resource.get('/')
->>> # Dump graph.
->>> set(rsrc.imr)
-{(rdflib.term.URIRef('info:fcres/'),
-  rdflib.term.URIRef('http://purl.org/dc/terms/title'),
-  rdflib.term.Literal('Repository Root')),
- (rdflib.term.URIRef('info:fcres/'),
-  rdflib.term.URIRef('http://www.w3.org/1999/02/22-rdf-syntax-ns#type'),
-  rdflib.term.URIRef('http://fedora.info/definitions/v4/repository#Container')),
- (rdflib.term.URIRef('info:fcres/'),
-  rdflib.term.URIRef('http://www.w3.org/1999/02/22-rdf-syntax-ns#type'),
-  rdflib.term.URIRef('http://fedora.info/definitions/v4/repository#RepositoryRoot')),
- (rdflib.term.URIRef('info:fcres/'),
-  rdflib.term.URIRef('http://www.w3.org/1999/02/22-rdf-syntax-ns#type'),
-  rdflib.term.URIRef('http://fedora.info/definitions/v4/repository#Resource')),
- (rdflib.term.URIRef('info:fcres/'),
-  rdflib.term.URIRef('http://www.w3.org/1999/02/22-rdf-syntax-ns#type'),
-  rdflib.term.URIRef('http://www.w3.org/ns/ldp#BasicContainer')),
- (rdflib.term.URIRef('info:fcres/'),
-  rdflib.term.URIRef('http://www.w3.org/1999/02/22-rdf-syntax-ns#type'),
-  rdflib.term.URIRef('http://www.w3.org/ns/ldp#Container')),
- (rdflib.term.URIRef('info:fcres/'),
-  rdflib.term.URIRef('http://www.w3.org/1999/02/22-rdf-syntax-ns#type'),
-  rdflib.term.URIRef('http://www.w3.org/ns/ldp#RDFSource'))}
+Quickstart::
+
+    >>> # First import default configuration and globals—only done once.
+    >>> import lakesuperior.default_env
+    >>> from lakesuperior.api import resource
+    >>> # Get root resource.
+    >>> rsrc = resource.get('/')
+    >>> # Dump graph.
+    >>> set(rsrc.imr)
+    {(rdflib.term.URIRef('info:fcres/'),
+      rdflib.term.URIRef('http://purl.org/dc/terms/title'),
+      rdflib.term.Literal('Repository Root')),
+     (rdflib.term.URIRef('info:fcres/'),
+      rdflib.term.URIRef('http://www.w3.org/1999/02/22-rdf-syntax-ns#type'),
+      rdflib.term.URIRef('http://fedora.info/definitions/v4/repository#Container')),
+     (rdflib.term.URIRef('info:fcres/'),
+      rdflib.term.URIRef('http://www.w3.org/1999/02/22-rdf-syntax-ns#type'),
+      rdflib.term.URIRef('http://fedora.info/definitions/v4/repository#RepositoryRoot')),
+     (rdflib.term.URIRef('info:fcres/'),
+      rdflib.term.URIRef('http://www.w3.org/1999/02/22-rdf-syntax-ns#type'),
+      rdflib.term.URIRef('http://fedora.info/definitions/v4/repository#Resource')),
+     (rdflib.term.URIRef('info:fcres/'),
+      rdflib.term.URIRef('http://www.w3.org/1999/02/22-rdf-syntax-ns#type'),
+      rdflib.term.URIRef('http://www.w3.org/ns/ldp#BasicContainer')),
+     (rdflib.term.URIRef('info:fcres/'),
+      rdflib.term.URIRef('http://www.w3.org/1999/02/22-rdf-syntax-ns#type'),
+      rdflib.term.URIRef('http://www.w3.org/ns/ldp#Container')),
+     (rdflib.term.URIRef('info:fcres/'),
+      rdflib.term.URIRef('http://www.w3.org/1999/02/22-rdf-syntax-ns#type'),
+      rdflib.term.URIRef('http://www.w3.org/ns/ldp#RDFSource'))}
 """
 
 def transaction(write=False):
@@ -200,11 +199,13 @@ def create(parent, slug=None, **kwargs):
     :param str parent: UID of the parent resource.
     :param str slug: Tentative path relative to the parent UID.
     :param \*\*kwargs: Other parameters are passed to the
-      :py:meth:`~lakesuperior.model.ldp_factory.LdpFactory.from_provided`
+      :py:meth:`~lakesuperior.model.ldp.ldp_factory.LdpFactory.from_provided`
       method.
 
-    :rtype: str
-    :return: UID of the new resource.
+    :rtype: tuple(str, lakesuperior.model.ldp.ldpr.Ldpr)
+    :return: A tuple of:
+        1. Event type (str): whether the resource was created or updated.
+        2. Resource (lakesuperior.model.ldp.ldpr.Ldpr): The new or updated resource.
     """
     uid = LdpFactory.mint_uid(parent, slug)
     logger.debug('Minted UID for new resource: {}'.format(uid))
@@ -212,7 +213,7 @@ def create(parent, slug=None, **kwargs):
 
     rsrc.create_or_replace(create_only=True)
 
-    return uid
+    return rsrc
 
 
 @transaction(True)
@@ -222,13 +223,16 @@ def create_or_replace(uid, **kwargs):
 
     :param string uid: UID of the resource to be created or updated.
     :param \*\*kwargs: Other parameters are passed to the
-        :py:meth:`~lakesuperior.model.ldp_factory.LdpFactory.from_provided`
+        :py:meth:`~lakesuperior.model.ldp.ldp_factory.LdpFactory.from_provided`
         method.
 
-    :rtype: str
-    :return: Event type: whether the resource was created or updated.
+    :rtype: tuple(str, lakesuperior.model.ldp.ldpr.Ldpr)
+    :return: A tuple of:
+        1. Event type (str): whether the resource was created or updated.
+        2. Resource (lakesuperior.model.ldp.ldpr.Ldpr): The new or updated resource.
     """
-    return LdpFactory.from_provided(uid, **kwargs).create_or_replace()
+    rsrc = LdpFactory.from_provided(uid, **kwargs)
+    return rsrc.create_or_replace(), rsrc
 
 
 @transaction(True)
@@ -269,8 +273,8 @@ def update_delta(uid, remove_trp, add_trp):
         add, as 3-tuples of RDFLib terms.
     """
     rsrc = LdpFactory.from_stored(uid)
-    remove_trp = rsrc.check_mgd_terms(SimpleGraph(remove_trp))
-    add_trp = rsrc.check_mgd_terms(SimpleGraph(add_trp))
+    remove_trp = rsrc.check_mgd_terms(remove_trp)
+    add_trp = rsrc.check_mgd_terms(add_trp)
 
     return rsrc.modify(RES_UPDATED, remove_trp, add_trp)
 

lakesuperior/cy_include/collections.pxd

@@ -0,0 +1,282 @@
+from libc.stdint cimport uint32_t
+
+ctypedef void* (*mem_alloc_ft)(size_t size)
+ctypedef void* (*mem_calloc_ft)(size_t blocks, size_t size)
+ctypedef void (*mem_free_ft)(void* block)
+ctypedef size_t (*hash_ft)(const void* key, int l, uint32_t seed)
+ctypedef int (*key_compare_ft)(const void* key1, const void* key2)
+
+
+cdef extern from "common.h":
+
+    enum cc_stat:
+        CC_OK
+        CC_ERR_ALLOC
+        CC_ERR_INVALID_CAPACITY
+        CC_ERR_INVALID_RANGE
+        CC_ERR_MAX_CAPACITY
+        CC_ERR_KEY_NOT_FOUND
+        CC_ERR_VALUE_NOT_FOUND
+        CC_ERR_OUT_OF_RANGE
+        CC_ITER_END
+
+    key_compare_ft CC_CMP_STRING
+    key_compare_ft CC_CMP_POINTER
+#
+#    int cc_common_cmp_str(const void* key1, const void* key2)
+#
+#    int cc_common_cmp_ptr(const void* key1, const void* key2)
+
+cdef extern from "array.h":
+
+    ctypedef struct Array:
+        pass
+
+    ctypedef struct ArrayConf:
+        size_t          capacity
+        float           exp_factor
+        mem_alloc_ft  mem_alloc
+        mem_calloc_ft mem_calloc
+        mem_free_ft   mem_free
+
+    ctypedef struct ArrayIter:
+        Array* ar
+        size_t index
+        bint last_removed
+
+#    ctypedef struct ArrayZipIter:
+#        Array* ar1
+#        Array* ar2
+#        size_t index
+#        bint last_removed
+#
+    cc_stat array_new(Array** out)
+
+    cc_stat array_new_conf(ArrayConf* conf, Array** out)
+
+    void array_conf_init(ArrayConf* conf)
+
+    void array_destroy(Array* ar)
+
+#    ctypedef void (*_array_destroy_cb_cb_ft)(void*)
+#
+#    void array_destroy_cb(Array* ar, _array_destroy_cb_cb_ft cb)
+#
+    cc_stat array_add(Array* ar, void* element)
+#
+#    #cc_stat array_add_at(Array* ar, void* element, size_t index)
+#
+#    cc_stat array_replace_at(Array* ar, void* element, size_t index, void** out)
+#
+#    cc_stat array_swap_at(Array* ar, size_t index1, size_t index2)
+#
+#    cc_stat array_remove(Array* ar, void* element, void** out)
+#
+#    cc_stat array_remove_at(Array* ar, size_t index, void** out)
+#
+#    cc_stat array_remove_last(Array* ar, void** out)
+#
+#    void array_remove_all(Array* ar)
+#
+#    void array_remove_all_free(Array* ar)
+#
+#    cc_stat array_get_at(Array* ar, size_t index, void** out)
+#
+#    cc_stat array_get_last(Array* ar, void** out)
+#
+#    cc_stat array_subarray(Array* ar, size_t from_, size_t to, Array** out)
+#
+#    cc_stat array_copy_shallow(Array* ar, Array** out)
+#
+#    ctypedef void* (*_array_copy_deep_cp_ft)(void*)
+#
+#    cc_stat array_copy_deep(Array* ar, _array_copy_deep_cp_ft cp, Array** out)
+#
+#    void array_reverse(Array* ar)
+#
+#    cc_stat array_trim_capacity(Array* ar)
+#
+#    size_t array_contains(Array* ar, void* element)
+#
+#    ctypedef int (*_array_contains_value_cmp_ft)(void*, void*)
+#
+#    size_t array_contains_value(Array* ar, void* element, _array_contains_value_cmp_ft cmp)
+#
+#    size_t array_size(Array* ar)
+#
+#    size_t array_capacity(Array* ar)
+#
+#    cc_stat array_index_of(Array* ar, void* element, size_t* index)
+#
+#    ctypedef int (*_array_sort_cmp_ft)(void*, void*)
+#
+#    void array_sort(Array* ar, _array_sort_cmp_ft cmp)
+#
+#    ctypedef void (*_array_map_fn_ft)(void*)
+#
+#    void array_map(Array* ar, _array_map_fn_ft fn)
+#
+#    ctypedef void (*_array_reduce_fn_ft)(void*, void*, void*)
+#
+#    void array_reduce(Array* ar, _array_reduce_fn_ft fn, void* result)
+#
+#    ctypedef bint (*_array_filter_mut_predicate_ft)(void*)
+#
+#    cc_stat array_filter_mut(Array* ar, _array_filter_mut_predicate_ft predicate)
+#
+#    ctypedef bint (*_array_filter_predicate_ft)(void*)
+#
+#    cc_stat array_filter(Array* ar, _array_filter_predicate_ft predicate, Array** out)
+#
+    void array_iter_init(ArrayIter* iter, Array* ar)
+
+    cc_stat array_iter_next(ArrayIter* iter, void** out)
+#
+#    cc_stat array_iter_remove(ArrayIter* iter, void** out)
+#
+#    cc_stat array_iter_add(ArrayIter* iter, void* element)
+#
+#    cc_stat array_iter_replace(ArrayIter* iter, void* element, void** out)
+#
+#    size_t array_iter_index(ArrayIter* iter)
+#
+#    void array_zip_iter_init(ArrayZipIter* iter, Array* a1, Array* a2)
+#
+#    cc_stat array_zip_iter_next(ArrayZipIter* iter, void** out1, void** out2)
+#
+#    cc_stat array_zip_iter_add(ArrayZipIter* iter, void* e1, void* e2)
+#
+#    cc_stat array_zip_iter_remove(ArrayZipIter* iter, void** out1, void** out2)
+#
+#    cc_stat array_zip_iter_replace(ArrayZipIter* iter, void* e1, void* e2, void** out1, void** out2)
+#
+#    size_t array_zip_iter_index(ArrayZipIter* iter)
+#
+#    void** array_get_buffer(Array* ar)
+
+
+cdef extern from "hashtable.h":
+
+    ctypedef struct TableEntry:
+        void*       key
+        void*       value
+        size_t      hash
+        TableEntry* next
+
+    ctypedef struct HashTable:
+        pass
+
+    ctypedef struct HashTableConf:
+        float               load_factor
+        size_t              initial_capacity
+        int                 key_length
+        uint32_t            hash_seed
+
+        hash_ft           hash
+        key_compare_ft    key_compare
+        mem_alloc_ft  mem_alloc
+        mem_calloc_ft mem_calloc
+        mem_free_ft   mem_free
+
+    ctypedef struct HashTableIter:
+        HashTable* table
+        size_t bucket_index
+        TableEntry* prev_entry
+        TableEntry* next_entry
+
+    hash_ft GENERAL_HASH
+    hash_ft STRING_HASH
+    hash_ft POINTER_HASH
+
+#    size_t get_table_index(HashTable *table, void *key)
+#
+#    void hashtable_conf_init(HashTableConf* conf)
+#
+#    cc_stat hashtable_new(HashTable** out)
+#
+#    cc_stat hashtable_new_conf(HashTableConf* conf, HashTable** out)
+#
+#    void hashtable_destroy(HashTable* table)
+#
+#    cc_stat hashtable_add(HashTable* table, void* key, void* val)
+#
+#    cc_stat hashtable_get(HashTable* table, void* key, void** out)
+#
+#    cc_stat hashtable_remove(HashTable* table, void* key, void** out)
+#
+#    void hashtable_remove_all(HashTable* table)
+#
+#    bint hashtable_contains_key(HashTable* table, void* key)
+#
+#    size_t hashtable_size(HashTable* table)
+#
+#    size_t hashtable_capacity(HashTable* table)
+#
+#    cc_stat hashtable_get_keys(HashTable* table, Array** out)
+#
+#    cc_stat hashtable_get_values(HashTable* table, Array** out)
+#
+    size_t hashtable_hash_string(void* key, int len, uint32_t seed)
+
+    size_t hashtable_hash(void* key, int len, uint32_t seed)
+
+    size_t hashtable_hash_ptr(void* key, int len, uint32_t seed)
+#
+#    ctypedef void (*_hashtable_foreach_key_op_ft)(void*)
+#
+#    void hashtable_foreach_key(HashTable* table, _hashtable_foreach_key_op_ft op)
+#
+#    ctypedef void (*_hashtable_foreach_value_op_ft)(void*)
+#
+#    void hashtable_foreach_value(HashTable* table, _hashtable_foreach_value_op_ft op)
+#
+#    void hashtable_iter_init(HashTableIter* iter, HashTable* table)
+#
+#    cc_stat hashtable_iter_next(HashTableIter* iter, TableEntry** out)
+#
+#    cc_stat hashtable_iter_remove(HashTableIter* iter, void** out)
+
+
+cdef extern from "hashset.h":
+
+    ctypedef struct HashSet:
+        pass
+
+    ctypedef HashTableConf HashSetConf
+
+    ctypedef struct HashSetIter:
+        HashTableIter iter
+
+    void hashset_conf_init(HashSetConf* conf)
+
+    cc_stat hashset_new(HashSet** hs)
+
+    cc_stat hashset_new_conf(HashSetConf* conf, HashSet** hs)
+
+    void hashset_destroy(HashSet* set)
+
+    cc_stat hashset_add(HashSet* set, void* element)
+
+    cc_stat hashset_add_or_get(HashSet* set, void** element)
+
+    cc_stat hashset_remove(HashSet* set, void* element, void** out)
+
+    void hashset_remove_all(HashSet* set)
+
+    bint hashset_contains(HashSet* set, void* element)
+
+    cc_stat hashset_get(HashSet *set, void **element)
+
+    size_t hashset_size(HashSet* set)
+
+    size_t hashset_capacity(HashSet* set)
+
+    ctypedef void (*_hashset_foreach_op_ft)(void*)
+
+    void hashset_foreach(HashSet* set, _hashset_foreach_op_ft op)
+
+    void hashset_iter_init(HashSetIter* iter, HashSet* set)
+
+    cc_stat hashset_iter_next(HashSetIter* iter, void** out)
+
+    cc_stat hashset_iter_remove(HashSetIter* iter, void** out)

lakesuperior/cy_include/cylmdb.c

@@ -1,2344 +0,0 @@
-/* Generated by Cython 0.28.4 */
-
-#define PY_SSIZE_T_CLEAN
-#include "Python.h"
-#ifndef Py_PYTHON_H
-    #error Python headers needed to compile C extensions, please install development version of Python.
-#elif PY_VERSION_HEX < 0x02060000 || (0x03000000 <= PY_VERSION_HEX && PY_VERSION_HEX < 0x03030000)
-    #error Cython requires Python 2.6+ or Python 3.3+.
-#else
-#define CYTHON_ABI "0_28_4"
-#define CYTHON_FUTURE_DIVISION 0
-#include <stddef.h>
-#ifndef offsetof
-  #define offsetof(type, member) ( (size_t) & ((type*)0) -> member )
-#endif
-#if !defined(WIN32) && !defined(MS_WINDOWS)
-  #ifndef __stdcall
-    #define __stdcall
-  #endif
-  #ifndef __cdecl
-    #define __cdecl
-  #endif
-  #ifndef __fastcall
-    #define __fastcall
-  #endif
-#endif
-#ifndef DL_IMPORT
-  #define DL_IMPORT(t) t
-#endif
-#ifndef DL_EXPORT
-  #define DL_EXPORT(t) t
-#endif
-#define __PYX_COMMA ,
-#ifndef HAVE_LONG_LONG
-  #if PY_VERSION_HEX >= 0x02070000
-    #define HAVE_LONG_LONG
-  #endif
-#endif
-#ifndef PY_LONG_LONG
-  #define PY_LONG_LONG LONG_LONG
-#endif
-#ifndef Py_HUGE_VAL
-  #define Py_HUGE_VAL HUGE_VAL
-#endif
-#ifdef PYPY_VERSION
-  #define CYTHON_COMPILING_IN_PYPY 1
-  #define CYTHON_COMPILING_IN_PYSTON 0
-  #define CYTHON_COMPILING_IN_CPYTHON 0
-  #undef CYTHON_USE_TYPE_SLOTS
-  #define CYTHON_USE_TYPE_SLOTS 0
-  #undef CYTHON_USE_PYTYPE_LOOKUP
-  #define CYTHON_USE_PYTYPE_LOOKUP 0
-  #if PY_VERSION_HEX < 0x03050000
-    #undef CYTHON_USE_ASYNC_SLOTS
-    #define CYTHON_USE_ASYNC_SLOTS 0
-  #elif !defined(CYTHON_USE_ASYNC_SLOTS)
-    #define CYTHON_USE_ASYNC_SLOTS 1
-  #endif
-  #undef CYTHON_USE_PYLIST_INTERNALS
-  #define CYTHON_USE_PYLIST_INTERNALS 0
-  #undef CYTHON_USE_UNICODE_INTERNALS
-  #define CYTHON_USE_UNICODE_INTERNALS 0
-  #undef CYTHON_USE_UNICODE_WRITER
-  #define CYTHON_USE_UNICODE_WRITER 0
-  #undef CYTHON_USE_PYLONG_INTERNALS
-  #define CYTHON_USE_PYLONG_INTERNALS 0
-  #undef CYTHON_AVOID_BORROWED_REFS
-  #define CYTHON_AVOID_BORROWED_REFS 1
-  #undef CYTHON_ASSUME_SAFE_MACROS
-  #define CYTHON_ASSUME_SAFE_MACROS 0
-  #undef CYTHON_UNPACK_METHODS
-  #define CYTHON_UNPACK_METHODS 0
-  #undef CYTHON_FAST_THREAD_STATE
-  #define CYTHON_FAST_THREAD_STATE 0
-  #undef CYTHON_FAST_PYCALL
-  #define CYTHON_FAST_PYCALL 0
-  #undef CYTHON_PEP489_MULTI_PHASE_INIT
-  #define CYTHON_PEP489_MULTI_PHASE_INIT 0
-  #undef CYTHON_USE_TP_FINALIZE
-  #define CYTHON_USE_TP_FINALIZE 0
-#elif defined(PYSTON_VERSION)
-  #define CYTHON_COMPILING_IN_PYPY 0
-  #define CYTHON_COMPILING_IN_PYSTON 1
-  #define CYTHON_COMPILING_IN_CPYTHON 0
-  #ifndef CYTHON_USE_TYPE_SLOTS
-    #define CYTHON_USE_TYPE_SLOTS 1
-  #endif
-  #undef CYTHON_USE_PYTYPE_LOOKUP
-  #define CYTHON_USE_PYTYPE_LOOKUP 0
-  #undef CYTHON_USE_ASYNC_SLOTS
-  #define CYTHON_USE_ASYNC_SLOTS 0
-  #undef CYTHON_USE_PYLIST_INTERNALS
-  #define CYTHON_USE_PYLIST_INTERNALS 0
-  #ifndef CYTHON_USE_UNICODE_INTERNALS
-    #define CYTHON_USE_UNICODE_INTERNALS 1
-  #endif
-  #undef CYTHON_USE_UNICODE_WRITER
-  #define CYTHON_USE_UNICODE_WRITER 0
-  #undef CYTHON_USE_PYLONG_INTERNALS
-  #define CYTHON_USE_PYLONG_INTERNALS 0
-  #ifndef CYTHON_AVOID_BORROWED_REFS
-    #define CYTHON_AVOID_BORROWED_REFS 0
-  #endif
-  #ifndef CYTHON_ASSUME_SAFE_MACROS
-    #define CYTHON_ASSUME_SAFE_MACROS 1
-  #endif
-  #ifndef CYTHON_UNPACK_METHODS
-    #define CYTHON_UNPACK_METHODS 1
-  #endif
-  #undef CYTHON_FAST_THREAD_STATE
-  #define CYTHON_FAST_THREAD_STATE 0
-  #undef CYTHON_FAST_PYCALL
-  #define CYTHON_FAST_PYCALL 0
-  #undef CYTHON_PEP489_MULTI_PHASE_INIT
-  #define CYTHON_PEP489_MULTI_PHASE_INIT 0
-  #undef CYTHON_USE_TP_FINALIZE
-  #define CYTHON_USE_TP_FINALIZE 0
-#else
-  #define CYTHON_COMPILING_IN_PYPY 0
-  #define CYTHON_COMPILING_IN_PYSTON 0
-  #define CYTHON_COMPILING_IN_CPYTHON 1
-  #ifndef CYTHON_USE_TYPE_SLOTS
-    #define CYTHON_USE_TYPE_SLOTS 1
-  #endif
-  #if PY_VERSION_HEX < 0x02070000
-    #undef CYTHON_USE_PYTYPE_LOOKUP
-    #define CYTHON_USE_PYTYPE_LOOKUP 0
-  #elif !defined(CYTHON_USE_PYTYPE_LOOKUP)
-    #define CYTHON_USE_PYTYPE_LOOKUP 1
-  #endif
-  #if PY_MAJOR_VERSION < 3
-    #undef CYTHON_USE_ASYNC_SLOTS
-    #define CYTHON_USE_ASYNC_SLOTS 0
-  #elif !defined(CYTHON_USE_ASYNC_SLOTS)
-    #define CYTHON_USE_ASYNC_SLOTS 1
-  #endif
-  #if PY_VERSION_HEX < 0x02070000
-    #undef CYTHON_USE_PYLONG_INTERNALS
-    #define CYTHON_USE_PYLONG_INTERNALS 0
-  #elif !defined(CYTHON_USE_PYLONG_INTERNALS)
-    #define CYTHON_USE_PYLONG_INTERNALS 1
-  #endif
-  #ifndef CYTHON_USE_PYLIST_INTERNALS
-    #define CYTHON_USE_PYLIST_INTERNALS 1
-  #endif
-  #ifndef CYTHON_USE_UNICODE_INTERNALS
-    #define CYTHON_USE_UNICODE_INTERNALS 1
-  #endif
-  #if PY_VERSION_HEX < 0x030300F0
-    #undef CYTHON_USE_UNICODE_WRITER
-    #define CYTHON_USE_UNICODE_WRITER 0
-  #elif !defined(CYTHON_USE_UNICODE_WRITER)
-    #define CYTHON_USE_UNICODE_WRITER 1
-  #endif
-  #ifndef CYTHON_AVOID_BORROWED_REFS
-    #define CYTHON_AVOID_BORROWED_REFS 0
-  #endif
-  #ifndef CYTHON_ASSUME_SAFE_MACROS
-    #define CYTHON_ASSUME_SAFE_MACROS 1
-  #endif
-  #ifndef CYTHON_UNPACK_METHODS
-    #define CYTHON_UNPACK_METHODS 1
-  #endif
-  #ifndef CYTHON_FAST_THREAD_STATE
-    #define CYTHON_FAST_THREAD_STATE 1
-  #endif
-  #ifndef CYTHON_FAST_PYCALL
-    #define CYTHON_FAST_PYCALL 1
-  #endif
-  #ifndef CYTHON_PEP489_MULTI_PHASE_INIT
-    #define CYTHON_PEP489_MULTI_PHASE_INIT (0 && PY_VERSION_HEX >= 0x03050000)
-  #endif
-  #ifndef CYTHON_USE_TP_FINALIZE
-    #define CYTHON_USE_TP_FINALIZE (PY_VERSION_HEX >= 0x030400a1)
-  #endif
-#endif
-#if !defined(CYTHON_FAST_PYCCALL)
-#define CYTHON_FAST_PYCCALL  (CYTHON_FAST_PYCALL && PY_VERSION_HEX >= 0x030600B1)
-#endif
-#if CYTHON_USE_PYLONG_INTERNALS
-  #include "longintrepr.h"
-  #undef SHIFT
-  #undef BASE
-  #undef MASK
-#endif
-#ifndef __has_attribute
-  #define __has_attribute(x) 0
-#endif
-#ifndef __has_cpp_attribute
-  #define __has_cpp_attribute(x) 0
-#endif
-#ifndef CYTHON_RESTRICT
-  #if defined(__GNUC__)
-    #define CYTHON_RESTRICT __restrict__
-  #elif defined(_MSC_VER) && _MSC_VER >= 1400
-    #define CYTHON_RESTRICT __restrict
-  #elif defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
-    #define CYTHON_RESTRICT restrict
-  #else
-    #define CYTHON_RESTRICT
-  #endif
-#endif
-#ifndef CYTHON_UNUSED
-# if defined(__GNUC__)
-#   if !(defined(__cplusplus)) || (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4))
-#     define CYTHON_UNUSED __attribute__ ((__unused__))
-#   else
-#     define CYTHON_UNUSED
-#   endif
-# elif defined(__ICC) || (defined(__INTEL_COMPILER) && !defined(_MSC_VER))
-#   define CYTHON_UNUSED __attribute__ ((__unused__))
-# else
-#   define CYTHON_UNUSED
-# endif
-#endif
-#ifndef CYTHON_MAYBE_UNUSED_VAR
-#  if defined(__cplusplus)
-     template<class T> void CYTHON_MAYBE_UNUSED_VAR( const T& ) { }
-#  else
-#    define CYTHON_MAYBE_UNUSED_VAR(x) (void)(x)
-#  endif
-#endif
-#ifndef CYTHON_NCP_UNUSED
-# if CYTHON_COMPILING_IN_CPYTHON
-#  define CYTHON_NCP_UNUSED
-# else
-#  define CYTHON_NCP_UNUSED CYTHON_UNUSED
-# endif
-#endif
-#define __Pyx_void_to_None(void_result) ((void)(void_result), Py_INCREF(Py_None), Py_None)
-#ifdef _MSC_VER
-    #ifndef _MSC_STDINT_H_
-        #if _MSC_VER < 1300
-           typedef unsigned char     uint8_t;
-           typedef unsigned int      uint32_t;
-        #else
-           typedef unsigned __int8   uint8_t;
-           typedef unsigned __int32  uint32_t;
-        #endif
-    #endif
-#else
-   #include <stdint.h>
-#endif
-#ifndef CYTHON_FALLTHROUGH
-  #if defined(__cplusplus) && __cplusplus >= 201103L
-    #if __has_cpp_attribute(fallthrough)
-      #define CYTHON_FALLTHROUGH [[fallthrough]]
-    #elif __has_cpp_attribute(clang::fallthrough)
-      #define CYTHON_FALLTHROUGH [[clang::fallthrough]]
-    #elif __has_cpp_attribute(gnu::fallthrough)
-      #define CYTHON_FALLTHROUGH [[gnu::fallthrough]]
-    #endif
-  #endif
-  #ifndef CYTHON_FALLTHROUGH
-    #if __has_attribute(fallthrough)
-      #define CYTHON_FALLTHROUGH __attribute__((fallthrough))
-    #else
-      #define CYTHON_FALLTHROUGH
-    #endif
-  #endif
-  #if defined(__clang__ ) && defined(__apple_build_version__)
-    #if __apple_build_version__ < 7000000
-      #undef  CYTHON_FALLTHROUGH
-      #define CYTHON_FALLTHROUGH
-    #endif
-  #endif
-#endif
-
-#ifndef CYTHON_INLINE
-  #if defined(__clang__)
-    #define CYTHON_INLINE __inline__ __attribute__ ((__unused__))
-  #elif defined(__GNUC__)
-    #define CYTHON_INLINE __inline__
-  #elif defined(_MSC_VER)
-    #define CYTHON_INLINE __inline
-  #elif defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
-    #define CYTHON_INLINE inline
-  #else
-    #define CYTHON_INLINE
-  #endif
-#endif
-
-#if CYTHON_COMPILING_IN_PYPY && PY_VERSION_HEX < 0x02070600 && !defined(Py_OptimizeFlag)
-  #define Py_OptimizeFlag 0
-#endif
-#define __PYX_BUILD_PY_SSIZE_T "n"
-#define CYTHON_FORMAT_SSIZE_T "z"
-#if PY_MAJOR_VERSION < 3
-  #define __Pyx_BUILTIN_MODULE_NAME "__builtin__"
-  #define __Pyx_PyCode_New(a, k, l, s, f, code, c, n, v, fv, cell, fn, name, fline, lnos)\
-          PyCode_New(a+k, l, s, f, code, c, n, v, fv, cell, fn, name, fline, lnos)
-  #define __Pyx_DefaultClassType PyClass_Type
-#else
-  #define __Pyx_BUILTIN_MODULE_NAME "builtins"
-  #define __Pyx_PyCode_New(a, k, l, s, f, code, c, n, v, fv, cell, fn, name, fline, lnos)\
-          PyCode_New(a, k, l, s, f, code, c, n, v, fv, cell, fn, name, fline, lnos)
-  #define __Pyx_DefaultClassType PyType_Type
-#endif
-#ifndef Py_TPFLAGS_CHECKTYPES
-  #define Py_TPFLAGS_CHECKTYPES 0
-#endif
-#ifndef Py_TPFLAGS_HAVE_INDEX
-  #define Py_TPFLAGS_HAVE_INDEX 0
-#endif
-#ifndef Py_TPFLAGS_HAVE_NEWBUFFER
-  #define Py_TPFLAGS_HAVE_NEWBUFFER 0
-#endif
-#ifndef Py_TPFLAGS_HAVE_FINALIZE
-  #define Py_TPFLAGS_HAVE_FINALIZE 0
-#endif
-#if PY_VERSION_HEX <= 0x030700A3 || !defined(METH_FASTCALL)
-  #ifndef METH_FASTCALL
-     #define METH_FASTCALL 0x80
-  #endif
-  typedef PyObject *(*__Pyx_PyCFunctionFast) (PyObject *self, PyObject *const *args, Py_ssize_t nargs);
-  typedef PyObject *(*__Pyx_PyCFunctionFastWithKeywords) (PyObject *self, PyObject *const *args,
-                                                          Py_ssize_t nargs, PyObject *kwnames);
-#else
-  #define __Pyx_PyCFunctionFast _PyCFunctionFast
-  #define __Pyx_PyCFunctionFastWithKeywords _PyCFunctionFastWithKeywords
-#endif
-#if CYTHON_FAST_PYCCALL
-#define __Pyx_PyFastCFunction_Check(func)\
-    ((PyCFunction_Check(func) && (METH_FASTCALL == (PyCFunction_GET_FLAGS(func) & ~(METH_CLASS | METH_STATIC | METH_COEXIST | METH_KEYWORDS)))))
-#else
-#define __Pyx_PyFastCFunction_Check(func) 0
-#endif
-#if CYTHON_COMPILING_IN_PYPY && !defined(PyObject_Malloc)
-  #define PyObject_Malloc(s)   PyMem_Malloc(s)
-  #define PyObject_Free(p)     PyMem_Free(p)
-  #define PyObject_Realloc(p)  PyMem_Realloc(p)
-#endif
-#if CYTHON_COMPILING_IN_PYSTON
-  #define __Pyx_PyCode_HasFreeVars(co)  PyCode_HasFreeVars(co)
-  #define __Pyx_PyFrame_SetLineNumber(frame, lineno) PyFrame_SetLineNumber(frame, lineno)
-#else
-  #define __Pyx_PyCode_HasFreeVars(co)  (PyCode_GetNumFree(co) > 0)
-  #define __Pyx_PyFrame_SetLineNumber(frame, lineno)  (frame)->f_lineno = (lineno)
-#endif
-#if !CYTHON_FAST_THREAD_STATE || PY_VERSION_HEX < 0x02070000
-  #define __Pyx_PyThreadState_Current PyThreadState_GET()
-#elif PY_VERSION_HEX >= 0x03060000
-  #define __Pyx_PyThreadState_Current _PyThreadState_UncheckedGet()
-#elif PY_VERSION_HEX >= 0x03000000
-  #define __Pyx_PyThreadState_Current PyThreadState_GET()
-#else
-  #define __Pyx_PyThreadState_Current _PyThreadState_Current
-#endif
-#if PY_VERSION_HEX < 0x030700A2 && !defined(PyThread_tss_create) && !defined(Py_tss_NEEDS_INIT)
-#include "pythread.h"
-#define Py_tss_NEEDS_INIT 0
-typedef int Py_tss_t;
-static CYTHON_INLINE int PyThread_tss_create(Py_tss_t *key) {
-  *key = PyThread_create_key();
-  return 0; // PyThread_create_key reports success always
-}
-static CYTHON_INLINE Py_tss_t * PyThread_tss_alloc(void) {
-  Py_tss_t *key = (Py_tss_t *)PyObject_Malloc(sizeof(Py_tss_t));
-  *key = Py_tss_NEEDS_INIT;
-  return key;
-}
-static CYTHON_INLINE void PyThread_tss_free(Py_tss_t *key) {
-  PyObject_Free(key);
-}
-static CYTHON_INLINE int PyThread_tss_is_created(Py_tss_t *key) {
-  return *key != Py_tss_NEEDS_INIT;
-}
-static CYTHON_INLINE void PyThread_tss_delete(Py_tss_t *key) {
-  PyThread_delete_key(*key);
-  *key = Py_tss_NEEDS_INIT;
-}
-static CYTHON_INLINE int PyThread_tss_set(Py_tss_t *key, void *value) {
-  return PyThread_set_key_value(*key, value);
-}
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-  #ifndef PyUnicode_InternFromString
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-#ifndef __Pyx_PyAsyncMethodsStruct
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-#endif
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-}
-
-#ifndef __PYX_EXTERN_C
-  #ifdef __cplusplus
-    #define __PYX_EXTERN_C extern "C"
-  #else
-    #define __PYX_EXTERN_C extern
-  #endif
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-
-#define __PYX_HAVE__lakesuperior__cy_include__cylmdb
-#define __PYX_HAVE_API__lakesuperior__cy_include__cylmdb
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-#endif /* _OPENMP */
-
-#if defined(PYREX_WITHOUT_ASSERTIONS) && !defined(CYTHON_WITHOUT_ASSERTIONS)
-#define CYTHON_WITHOUT_ASSERTIONS
-#endif
-
-typedef struct {PyObject **p; const char *s; const Py_ssize_t n; const char* encoding;
-                const char is_unicode; const char is_str; const char intern; } __Pyx_StringTabEntry;
-
-#define __PYX_DEFAULT_STRING_ENCODING_IS_ASCII 0
-#define __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT 0
-#define __PYX_DEFAULT_STRING_ENCODING ""
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-#define __Pyx_PyObject_FromStringAndSize __Pyx_PyBytes_FromStringAndSize
-#define __Pyx_uchar_cast(c) ((unsigned char)c)
-#define __Pyx_long_cast(x) ((long)x)
-#define __Pyx_fits_Py_ssize_t(v, type, is_signed)  (\
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-    (sizeof(type) > sizeof(Py_ssize_t) &&\
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-                 v == (type)PY_SSIZE_T_MAX)  &&\
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-                                v == (type)PY_SSIZE_T_MIN)))  ||\
-    (sizeof(type) == sizeof(Py_ssize_t) &&\
-          (is_signed || likely(v < (type)PY_SSIZE_T_MAX ||\
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-#if defined (__cplusplus) && __cplusplus >= 201103L
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-    #define __Pyx_sst_abs(value) abs(value)
-#elif SIZEOF_LONG >= SIZEOF_SIZE_T
-    #define __Pyx_sst_abs(value) labs(value)
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-#elif defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
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-#elif defined (__GNUC__)
-    #define __Pyx_sst_abs(value) __builtin_llabs(value)
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-    #define __Pyx_sst_abs(value) ((value<0) ? -value : value)
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-static CYTHON_INLINE const char* __Pyx_PyObject_AsString(PyObject*);
-static CYTHON_INLINE const char* __Pyx_PyObject_AsStringAndSize(PyObject*, Py_ssize_t* length);
-#define __Pyx_PyByteArray_FromString(s) PyByteArray_FromStringAndSize((const char*)s, strlen((const char*)s))
-#define __Pyx_PyByteArray_FromStringAndSize(s, l) PyByteArray_FromStringAndSize((const char*)s, l)
-#define __Pyx_PyBytes_FromString        PyBytes_FromString
-#define __Pyx_PyBytes_FromStringAndSize PyBytes_FromStringAndSize
-static CYTHON_INLINE PyObject* __Pyx_PyUnicode_FromString(const char*);
-#if PY_MAJOR_VERSION < 3
-    #define __Pyx_PyStr_FromString        __Pyx_PyBytes_FromString
-    #define __Pyx_PyStr_FromStringAndSize __Pyx_PyBytes_FromStringAndSize
-#else
-    #define __Pyx_PyStr_FromString        __Pyx_PyUnicode_FromString
-    #define __Pyx_PyStr_FromStringAndSize __Pyx_PyUnicode_FromStringAndSize
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-#define __Pyx_PyBytes_AsString(s)     ((const char*) PyBytes_AS_STRING(s))
-#define __Pyx_PyBytes_AsSString(s)    ((const signed char*) PyBytes_AS_STRING(s))
-#define __Pyx_PyBytes_AsUString(s)    ((const unsigned char*) PyBytes_AS_STRING(s))
-#define __Pyx_PyObject_AsWritableString(s)    ((char*) __Pyx_PyObject_AsString(s))
-#define __Pyx_PyObject_AsWritableSString(s)    ((signed char*) __Pyx_PyObject_AsString(s))
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-#define __Pyx_PyObject_AsUString(s)    ((const unsigned char*) __Pyx_PyObject_AsString(s))
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-static CYTHON_INLINE size_t __Pyx_Py_UNICODE_strlen(const Py_UNICODE *u) {
-    const Py_UNICODE *u_end = u;
-    while (*u_end++) ;
-    return (size_t)(u_end - u - 1);
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-#define __Pyx_PyUnicode_FromUnicode(u)       PyUnicode_FromUnicode(u, __Pyx_Py_UNICODE_strlen(u))
-#define __Pyx_PyUnicode_FromUnicodeAndLength PyUnicode_FromUnicode
-#define __Pyx_PyUnicode_AsUnicode            PyUnicode_AsUnicode
-#define __Pyx_NewRef(obj) (Py_INCREF(obj), obj)
-#define __Pyx_Owned_Py_None(b) __Pyx_NewRef(Py_None)
-static CYTHON_INLINE PyObject * __Pyx_PyBool_FromLong(long b);
-static CYTHON_INLINE int __Pyx_PyObject_IsTrue(PyObject*);
-static CYTHON_INLINE PyObject* __Pyx_PyNumber_IntOrLong(PyObject* x);
-#define __Pyx_PySequence_Tuple(obj)\
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-static CYTHON_INLINE PyObject * __Pyx_PyInt_FromSize_t(size_t);
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-#define __pyx_PyFloat_AsDouble(x) PyFloat_AsDouble(x)
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-#define __pyx_PyFloat_AsFloat(x) ((float) __pyx_PyFloat_AsDouble(x))
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-#define __Pyx_PyNumber_Int(x) (PyLong_CheckExact(x) ? __Pyx_NewRef(x) : PyNumber_Long(x))
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-static int __Pyx_sys_getdefaultencoding_not_ascii;
-static int __Pyx_init_sys_getdefaultencoding_params(void) {
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-    PyObject* ascii_chars_u = NULL;
-    PyObject* ascii_chars_b = NULL;
-    const char* default_encoding_c;
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-    if (!sys) goto bad;
-    default_encoding = PyObject_CallMethod(sys, (char*) "getdefaultencoding", NULL);
-    Py_DECREF(sys);
-    if (!default_encoding) goto bad;
-    default_encoding_c = PyBytes_AsString(default_encoding);
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-    if (!sys) goto bad;
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-    Py_DECREF(sys);
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-    __PYX_DEFAULT_STRING_ENCODING = (char*) malloc(strlen(default_encoding_c));
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-  return __pyx_m;
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-    PyTypeObject* tp = Py_TYPE(obj);
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-#if PY_MAJOR_VERSION < 3
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-#endif
-    return PyObject_GetAttr(obj, attr_name);
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-/* PyErrFetchRestore */
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-static CYTHON_INLINE void __Pyx_ErrRestoreInState(PyThreadState *tstate, PyObject *type, PyObject *value, PyObject *tb) {
-    PyObject *tmp_type, *tmp_value, *tmp_tb;
-    tmp_type = tstate->curexc_type;
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-    tstate->curexc_type = type;
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-    *type = tstate->curexc_type;
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-    tstate->curexc_traceback = 0;
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-/* CLineInTraceback */
-#ifndef CYTHON_CLINE_IN_TRACEBACK
-static int __Pyx_CLineForTraceback(CYTHON_UNUSED PyThreadState *tstate, int c_line) {
-    PyObject *use_cline;
-    PyObject *ptype, *pvalue, *ptraceback;
-#if CYTHON_COMPILING_IN_CPYTHON
-    PyObject **cython_runtime_dict;
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-    cython_runtime_dict = _PyObject_GetDictPtr(__pyx_cython_runtime);
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-#endif
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-        Py_DECREF(use_cline_obj);
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-        PyErr_Clear();
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-    if (!use_cline) {
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-        PyObject_SetAttr(__pyx_cython_runtime, __pyx_n_s_cline_in_traceback, Py_False);
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-    __Pyx_ErrRestoreInState(tstate, ptype, pvalue, ptraceback);
-    return c_line;
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-#endif
-
-/* CodeObjectCache */
-static int __pyx_bisect_code_objects(__Pyx_CodeObjectCacheEntry* entries, int count, int code_line) {
-    int start = 0, mid = 0, end = count - 1;
-    if (end >= 0 && code_line > entries[end].code_line) {
-        return count;
-    }
-    while (start < end) {
-        mid = start + (end - start) / 2;
-        if (code_line < entries[mid].code_line) {
-            end = mid;
-        } else if (code_line > entries[mid].code_line) {
-             start = mid + 1;
-        } else {
-            return mid;
-        }
-    }
-    if (code_line <= entries[mid].code_line) {
-        return mid;
-    } else {
-        return mid + 1;
-    }
-}
-static PyCodeObject *__pyx_find_code_object(int code_line) {
-    PyCodeObject* code_object;
-    int pos;
-    if (unlikely(!code_line) || unlikely(!__pyx_code_cache.entries)) {
-        return NULL;
-    }
-    pos = __pyx_bisect_code_objects(__pyx_code_cache.entries, __pyx_code_cache.count, code_line);
-    if (unlikely(pos >= __pyx_code_cache.count) || unlikely(__pyx_code_cache.entries[pos].code_line != code_line)) {
-        return NULL;
-    }
-    code_object = __pyx_code_cache.entries[pos].code_object;
-    Py_INCREF(code_object);
-    return code_object;
-}
-static void __pyx_insert_code_object(int code_line, PyCodeObject* code_object) {
-    int pos, i;
-    __Pyx_CodeObjectCacheEntry* entries = __pyx_code_cache.entries;
-    if (unlikely(!code_line)) {
-        return;
-    }
-    if (unlikely(!entries)) {
-        entries = (__Pyx_CodeObjectCacheEntry*)PyMem_Malloc(64*sizeof(__Pyx_CodeObjectCacheEntry));
-        if (likely(entries)) {
-            __pyx_code_cache.entries = entries;
-            __pyx_code_cache.max_count = 64;
-            __pyx_code_cache.count = 1;
-            entries[0].code_line = code_line;
-            entries[0].code_object = code_object;
-            Py_INCREF(code_object);
-        }
-        return;
-    }
-    pos = __pyx_bisect_code_objects(__pyx_code_cache.entries, __pyx_code_cache.count, code_line);
-    if ((pos < __pyx_code_cache.count) && unlikely(__pyx_code_cache.entries[pos].code_line == code_line)) {
-        PyCodeObject* tmp = entries[pos].code_object;
-        entries[pos].code_object = code_object;
-        Py_DECREF(tmp);
-        return;
-    }
-    if (__pyx_code_cache.count == __pyx_code_cache.max_count) {
-        int new_max = __pyx_code_cache.max_count + 64;
-        entries = (__Pyx_CodeObjectCacheEntry*)PyMem_Realloc(
-            __pyx_code_cache.entries, (size_t)new_max*sizeof(__Pyx_CodeObjectCacheEntry));
-        if (unlikely(!entries)) {
-            return;
-        }
-        __pyx_code_cache.entries = entries;
-        __pyx_code_cache.max_count = new_max;
-    }
-    for (i=__pyx_code_cache.count; i>pos; i--) {
-        entries[i] = entries[i-1];
-    }
-    entries[pos].code_line = code_line;
-    entries[pos].code_object = code_object;
-    __pyx_code_cache.count++;
-    Py_INCREF(code_object);
-}
-
-/* AddTraceback */
-#include "compile.h"
-#include "frameobject.h"
-#include "traceback.h"
-static PyCodeObject* __Pyx_CreateCodeObjectForTraceback(
-            const char *funcname, int c_line,
-            int py_line, const char *filename) {
-    PyCodeObject *py_code = 0;
-    PyObject *py_srcfile = 0;
-    PyObject *py_funcname = 0;
-    #if PY_MAJOR_VERSION < 3
-    py_srcfile = PyString_FromString(filename);
-    #else
-    py_srcfile = PyUnicode_FromString(filename);
-    #endif
-    if (!py_srcfile) goto bad;
-    if (c_line) {
-        #if PY_MAJOR_VERSION < 3
-        py_funcname = PyString_FromFormat( "%s (%s:%d)", funcname, __pyx_cfilenm, c_line);
-        #else
-        py_funcname = PyUnicode_FromFormat( "%s (%s:%d)", funcname, __pyx_cfilenm, c_line);
-        #endif
-    }
-    else {
-        #if PY_MAJOR_VERSION < 3
-        py_funcname = PyString_FromString(funcname);
-        #else
-        py_funcname = PyUnicode_FromString(funcname);
-        #endif
-    }
-    if (!py_funcname) goto bad;
-    py_code = __Pyx_PyCode_New(
-        0,
-        0,
-        0,
-        0,
-        0,
-        __pyx_empty_bytes, /*PyObject *code,*/
-        __pyx_empty_tuple, /*PyObject *consts,*/
-        __pyx_empty_tuple, /*PyObject *names,*/
-        __pyx_empty_tuple, /*PyObject *varnames,*/
-        __pyx_empty_tuple, /*PyObject *freevars,*/
-        __pyx_empty_tuple, /*PyObject *cellvars,*/
-        py_srcfile,   /*PyObject *filename,*/
-        py_funcname,  /*PyObject *name,*/
-        py_line,
-        __pyx_empty_bytes  /*PyObject *lnotab*/
-    );
-    Py_DECREF(py_srcfile);
-    Py_DECREF(py_funcname);
-    return py_code;
-bad:
-    Py_XDECREF(py_srcfile);
-    Py_XDECREF(py_funcname);
-    return NULL;
-}
-static void __Pyx_AddTraceback(const char *funcname, int c_line,
-                               int py_line, const char *filename) {
-    PyCodeObject *py_code = 0;
-    PyFrameObject *py_frame = 0;
-    PyThreadState *tstate = __Pyx_PyThreadState_Current;
-    if (c_line) {
-        c_line = __Pyx_CLineForTraceback(tstate, c_line);
-    }
-    py_code = __pyx_find_code_object(c_line ? -c_line : py_line);
-    if (!py_code) {
-        py_code = __Pyx_CreateCodeObjectForTraceback(
-            funcname, c_line, py_line, filename);
-        if (!py_code) goto bad;
-        __pyx_insert_code_object(c_line ? -c_line : py_line, py_code);
-    }
-    py_frame = PyFrame_New(
-        tstate,            /*PyThreadState *tstate,*/
-        py_code,           /*PyCodeObject *code,*/
-        __pyx_d,    /*PyObject *globals,*/
-        0                  /*PyObject *locals*/
-    );
-    if (!py_frame) goto bad;
-    __Pyx_PyFrame_SetLineNumber(py_frame, py_line);
-    PyTraceBack_Here(py_frame);
-bad:
-    Py_XDECREF(py_code);
-    Py_XDECREF(py_frame);
-}
-
-/* CIntToPy */
-static CYTHON_INLINE PyObject* __Pyx_PyInt_From_long(long value) {
-    const long neg_one = (long) -1, const_zero = (long) 0;
-    const int is_unsigned = neg_one > const_zero;
-    if (is_unsigned) {
-        if (sizeof(long) < sizeof(long)) {
-            return PyInt_FromLong((long) value);
-        } else if (sizeof(long) <= sizeof(unsigned long)) {
-            return PyLong_FromUnsignedLong((unsigned long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(long) <= sizeof(unsigned PY_LONG_LONG)) {
-            return PyLong_FromUnsignedLongLong((unsigned PY_LONG_LONG) value);
-#endif
-        }
-    } else {
-        if (sizeof(long) <= sizeof(long)) {
-            return PyInt_FromLong((long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(long) <= sizeof(PY_LONG_LONG)) {
-            return PyLong_FromLongLong((PY_LONG_LONG) value);
-#endif
-        }
-    }
-    {
-        int one = 1; int little = (int)*(unsigned char *)&one;
-        unsigned char *bytes = (unsigned char *)&value;
-        return _PyLong_FromByteArray(bytes, sizeof(long),
-                                     little, !is_unsigned);
-    }
-}
-
-/* CIntFromPyVerify */
-#define __PYX_VERIFY_RETURN_INT(target_type, func_type, func_value)\
-    __PYX__VERIFY_RETURN_INT(target_type, func_type, func_value, 0)
-#define __PYX_VERIFY_RETURN_INT_EXC(target_type, func_type, func_value)\
-    __PYX__VERIFY_RETURN_INT(target_type, func_type, func_value, 1)
-#define __PYX__VERIFY_RETURN_INT(target_type, func_type, func_value, exc)\
-    {\
-        func_type value = func_value;\
-        if (sizeof(target_type) < sizeof(func_type)) {\
-            if (unlikely(value != (func_type) (target_type) value)) {\
-                func_type zero = 0;\
-                if (exc && unlikely(value == (func_type)-1 && PyErr_Occurred()))\
-                    return (target_type) -1;\
-                if (is_unsigned && unlikely(value < zero))\
-                    goto raise_neg_overflow;\
-                else\
-                    goto raise_overflow;\
-            }\
-        }\
-        return (target_type) value;\
-    }
-
-/* CIntFromPy */
-static CYTHON_INLINE long __Pyx_PyInt_As_long(PyObject *x) {
-    const long neg_one = (long) -1, const_zero = (long) 0;
-    const int is_unsigned = neg_one > const_zero;
-#if PY_MAJOR_VERSION < 3
-    if (likely(PyInt_Check(x))) {
-        if (sizeof(long) < sizeof(long)) {
-            __PYX_VERIFY_RETURN_INT(long, long, PyInt_AS_LONG(x))
-        } else {
-            long val = PyInt_AS_LONG(x);
-            if (is_unsigned && unlikely(val < 0)) {
-                goto raise_neg_overflow;
-            }
-            return (long) val;
-        }
-    } else
-#endif
-    if (likely(PyLong_Check(x))) {
-        if (is_unsigned) {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (long) 0;
-                case  1: __PYX_VERIFY_RETURN_INT(long, digit, digits[0])
-                case 2:
-                    if (8 * sizeof(long) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) >= 2 * PyLong_SHIFT) {
-                            return (long) (((((long)digits[1]) << PyLong_SHIFT) | (long)digits[0]));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(long) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) >= 3 * PyLong_SHIFT) {
-                            return (long) (((((((long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0]));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(long) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) >= 4 * PyLong_SHIFT) {
-                            return (long) (((((((((long)digits[3]) << PyLong_SHIFT) | (long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0]));
-                        }
-                    }
-                    break;
-            }
-#endif
-#if CYTHON_COMPILING_IN_CPYTHON
-            if (unlikely(Py_SIZE(x) < 0)) {
-                goto raise_neg_overflow;
-            }
-#else
-            {
-                int result = PyObject_RichCompareBool(x, Py_False, Py_LT);
-                if (unlikely(result < 0))
-                    return (long) -1;
-                if (unlikely(result == 1))
-                    goto raise_neg_overflow;
-            }
-#endif
-            if (sizeof(long) <= sizeof(unsigned long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(long, unsigned long, PyLong_AsUnsignedLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(long) <= sizeof(unsigned PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(long, unsigned PY_LONG_LONG, PyLong_AsUnsignedLongLong(x))
-#endif
-            }
-        } else {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (long) 0;
-                case -1: __PYX_VERIFY_RETURN_INT(long, sdigit, (sdigit) (-(sdigit)digits[0]))
-                case  1: __PYX_VERIFY_RETURN_INT(long,  digit, +digits[0])
-                case -2:
-                    if (8 * sizeof(long) - 1 > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, long, -(long) (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 2 * PyLong_SHIFT) {
-                            return (long) (((long)-1)*(((((long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-                case 2:
-                    if (8 * sizeof(long) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 2 * PyLong_SHIFT) {
-                            return (long) ((((((long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-                case -3:
-                    if (8 * sizeof(long) - 1 > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, long, -(long) (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 3 * PyLong_SHIFT) {
-                            return (long) (((long)-1)*(((((((long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(long) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 3 * PyLong_SHIFT) {
-                            return (long) ((((((((long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-                case -4:
-                    if (8 * sizeof(long) - 1 > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, long, -(long) (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 4 * PyLong_SHIFT) {
-                            return (long) (((long)-1)*(((((((((long)digits[3]) << PyLong_SHIFT) | (long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(long) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 4 * PyLong_SHIFT) {
-                            return (long) ((((((((((long)digits[3]) << PyLong_SHIFT) | (long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-            }
-#endif
-            if (sizeof(long) <= sizeof(long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(long, long, PyLong_AsLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(long) <= sizeof(PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(long, PY_LONG_LONG, PyLong_AsLongLong(x))
-#endif
-            }
-        }
-        {
-#if CYTHON_COMPILING_IN_PYPY && !defined(_PyLong_AsByteArray)
-            PyErr_SetString(PyExc_RuntimeError,
-                            "_PyLong_AsByteArray() not available in PyPy, cannot convert large numbers");
-#else
-            long val;
-            PyObject *v = __Pyx_PyNumber_IntOrLong(x);
- #if PY_MAJOR_VERSION < 3
-            if (likely(v) && !PyLong_Check(v)) {
-                PyObject *tmp = v;
-                v = PyNumber_Long(tmp);
-                Py_DECREF(tmp);
-            }
- #endif
-            if (likely(v)) {
-                int one = 1; int is_little = (int)*(unsigned char *)&one;
-                unsigned char *bytes = (unsigned char *)&val;
-                int ret = _PyLong_AsByteArray((PyLongObject *)v,
-                                              bytes, sizeof(val),
-                                              is_little, !is_unsigned);
-                Py_DECREF(v);
-                if (likely(!ret))
-                    return val;
-            }
-#endif
-            return (long) -1;
-        }
-    } else {
-        long val;
-        PyObject *tmp = __Pyx_PyNumber_IntOrLong(x);
-        if (!tmp) return (long) -1;
-        val = __Pyx_PyInt_As_long(tmp);
-        Py_DECREF(tmp);
-        return val;
-    }
-raise_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "value too large to convert to long");
-    return (long) -1;
-raise_neg_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "can't convert negative value to long");
-    return (long) -1;
-}
-
-/* CIntFromPy */
-static CYTHON_INLINE int __Pyx_PyInt_As_int(PyObject *x) {
-    const int neg_one = (int) -1, const_zero = (int) 0;
-    const int is_unsigned = neg_one > const_zero;
-#if PY_MAJOR_VERSION < 3
-    if (likely(PyInt_Check(x))) {
-        if (sizeof(int) < sizeof(long)) {
-            __PYX_VERIFY_RETURN_INT(int, long, PyInt_AS_LONG(x))
-        } else {
-            long val = PyInt_AS_LONG(x);
-            if (is_unsigned && unlikely(val < 0)) {
-                goto raise_neg_overflow;
-            }
-            return (int) val;
-        }
-    } else
-#endif
-    if (likely(PyLong_Check(x))) {
-        if (is_unsigned) {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (int) 0;
-                case  1: __PYX_VERIFY_RETURN_INT(int, digit, digits[0])
-                case 2:
-                    if (8 * sizeof(int) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) >= 2 * PyLong_SHIFT) {
-                            return (int) (((((int)digits[1]) << PyLong_SHIFT) | (int)digits[0]));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(int) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) >= 3 * PyLong_SHIFT) {
-                            return (int) (((((((int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0]));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(int) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) >= 4 * PyLong_SHIFT) {
-                            return (int) (((((((((int)digits[3]) << PyLong_SHIFT) | (int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0]));
-                        }
-                    }
-                    break;
-            }
-#endif
-#if CYTHON_COMPILING_IN_CPYTHON
-            if (unlikely(Py_SIZE(x) < 0)) {
-                goto raise_neg_overflow;
-            }
-#else
-            {
-                int result = PyObject_RichCompareBool(x, Py_False, Py_LT);
-                if (unlikely(result < 0))
-                    return (int) -1;
-                if (unlikely(result == 1))
-                    goto raise_neg_overflow;
-            }
-#endif
-            if (sizeof(int) <= sizeof(unsigned long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(int, unsigned long, PyLong_AsUnsignedLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(int) <= sizeof(unsigned PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(int, unsigned PY_LONG_LONG, PyLong_AsUnsignedLongLong(x))
-#endif
-            }
-        } else {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (int) 0;
-                case -1: __PYX_VERIFY_RETURN_INT(int, sdigit, (sdigit) (-(sdigit)digits[0]))
-                case  1: __PYX_VERIFY_RETURN_INT(int,  digit, +digits[0])
-                case -2:
-                    if (8 * sizeof(int) - 1 > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, long, -(long) (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 2 * PyLong_SHIFT) {
-                            return (int) (((int)-1)*(((((int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-                case 2:
-                    if (8 * sizeof(int) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 2 * PyLong_SHIFT) {
-                            return (int) ((((((int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-                case -3:
-                    if (8 * sizeof(int) - 1 > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, long, -(long) (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 3 * PyLong_SHIFT) {
-                            return (int) (((int)-1)*(((((((int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(int) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 3 * PyLong_SHIFT) {
-                            return (int) ((((((((int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-                case -4:
-                    if (8 * sizeof(int) - 1 > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, long, -(long) (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 4 * PyLong_SHIFT) {
-                            return (int) (((int)-1)*(((((((((int)digits[3]) << PyLong_SHIFT) | (int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(int) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 4 * PyLong_SHIFT) {
-                            return (int) ((((((((((int)digits[3]) << PyLong_SHIFT) | (int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-            }
-#endif
-            if (sizeof(int) <= sizeof(long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(int, long, PyLong_AsLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(int) <= sizeof(PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(int, PY_LONG_LONG, PyLong_AsLongLong(x))
-#endif
-            }
-        }
-        {
-#if CYTHON_COMPILING_IN_PYPY && !defined(_PyLong_AsByteArray)
-            PyErr_SetString(PyExc_RuntimeError,
-                            "_PyLong_AsByteArray() not available in PyPy, cannot convert large numbers");
-#else
-            int val;
-            PyObject *v = __Pyx_PyNumber_IntOrLong(x);
- #if PY_MAJOR_VERSION < 3
-            if (likely(v) && !PyLong_Check(v)) {
-                PyObject *tmp = v;
-                v = PyNumber_Long(tmp);
-                Py_DECREF(tmp);
-            }
- #endif
-            if (likely(v)) {
-                int one = 1; int is_little = (int)*(unsigned char *)&one;
-                unsigned char *bytes = (unsigned char *)&val;
-                int ret = _PyLong_AsByteArray((PyLongObject *)v,
-                                              bytes, sizeof(val),
-                                              is_little, !is_unsigned);
-                Py_DECREF(v);
-                if (likely(!ret))
-                    return val;
-            }
-#endif
-            return (int) -1;
-        }
-    } else {
-        int val;
-        PyObject *tmp = __Pyx_PyNumber_IntOrLong(x);
-        if (!tmp) return (int) -1;
-        val = __Pyx_PyInt_As_int(tmp);
-        Py_DECREF(tmp);
-        return val;
-    }
-raise_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "value too large to convert to int");
-    return (int) -1;
-raise_neg_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "can't convert negative value to int");
-    return (int) -1;
-}
-
-/* FastTypeChecks */
-#if CYTHON_COMPILING_IN_CPYTHON
-static int __Pyx_InBases(PyTypeObject *a, PyTypeObject *b) {
-    while (a) {
-        a = a->tp_base;
-        if (a == b)
-            return 1;
-    }
-    return b == &PyBaseObject_Type;
-}
-static CYTHON_INLINE int __Pyx_IsSubtype(PyTypeObject *a, PyTypeObject *b) {
-    PyObject *mro;
-    if (a == b) return 1;
-    mro = a->tp_mro;
-    if (likely(mro)) {
-        Py_ssize_t i, n;
-        n = PyTuple_GET_SIZE(mro);
-        for (i = 0; i < n; i++) {
-            if (PyTuple_GET_ITEM(mro, i) == (PyObject *)b)
-                return 1;
-        }
-        return 0;
-    }
-    return __Pyx_InBases(a, b);
-}
-#if PY_MAJOR_VERSION == 2
-static int __Pyx_inner_PyErr_GivenExceptionMatches2(PyObject *err, PyObject* exc_type1, PyObject* exc_type2) {
-    PyObject *exception, *value, *tb;
-    int res;
-    __Pyx_PyThreadState_declare
-    __Pyx_PyThreadState_assign
-    __Pyx_ErrFetch(&exception, &value, &tb);
-    res = exc_type1 ? PyObject_IsSubclass(err, exc_type1) : 0;
-    if (unlikely(res == -1)) {
-        PyErr_WriteUnraisable(err);
-        res = 0;
-    }
-    if (!res) {
-        res = PyObject_IsSubclass(err, exc_type2);
-        if (unlikely(res == -1)) {
-            PyErr_WriteUnraisable(err);
-            res = 0;
-        }
-    }
-    __Pyx_ErrRestore(exception, value, tb);
-    return res;
-}
-#else
-static CYTHON_INLINE int __Pyx_inner_PyErr_GivenExceptionMatches2(PyObject *err, PyObject* exc_type1, PyObject *exc_type2) {
-    int res = exc_type1 ? __Pyx_IsSubtype((PyTypeObject*)err, (PyTypeObject*)exc_type1) : 0;
-    if (!res) {
-        res = __Pyx_IsSubtype((PyTypeObject*)err, (PyTypeObject*)exc_type2);
-    }
-    return res;
-}
-#endif
-static int __Pyx_PyErr_GivenExceptionMatchesTuple(PyObject *exc_type, PyObject *tuple) {
-    Py_ssize_t i, n;
-    assert(PyExceptionClass_Check(exc_type));
-    n = PyTuple_GET_SIZE(tuple);
-#if PY_MAJOR_VERSION >= 3
-    for (i=0; i<n; i++) {
-        if (exc_type == PyTuple_GET_ITEM(tuple, i)) return 1;
-    }
-#endif
-    for (i=0; i<n; i++) {
-        PyObject *t = PyTuple_GET_ITEM(tuple, i);
-        #if PY_MAJOR_VERSION < 3
-        if (likely(exc_type == t)) return 1;
-        #endif
-        if (likely(PyExceptionClass_Check(t))) {
-            if (__Pyx_inner_PyErr_GivenExceptionMatches2(exc_type, NULL, t)) return 1;
-        } else {
-        }
-    }
-    return 0;
-}
-static CYTHON_INLINE int __Pyx_PyErr_GivenExceptionMatches(PyObject *err, PyObject* exc_type) {
-    if (likely(err == exc_type)) return 1;
-    if (likely(PyExceptionClass_Check(err))) {
-        if (likely(PyExceptionClass_Check(exc_type))) {
-            return __Pyx_inner_PyErr_GivenExceptionMatches2(err, NULL, exc_type);
-        } else if (likely(PyTuple_Check(exc_type))) {
-            return __Pyx_PyErr_GivenExceptionMatchesTuple(err, exc_type);
-        } else {
-        }
-    }
-    return PyErr_GivenExceptionMatches(err, exc_type);
-}
-static CYTHON_INLINE int __Pyx_PyErr_GivenExceptionMatches2(PyObject *err, PyObject *exc_type1, PyObject *exc_type2) {
-    assert(PyExceptionClass_Check(exc_type1));
-    assert(PyExceptionClass_Check(exc_type2));
-    if (likely(err == exc_type1 || err == exc_type2)) return 1;
-    if (likely(PyExceptionClass_Check(err))) {
-        return __Pyx_inner_PyErr_GivenExceptionMatches2(err, exc_type1, exc_type2);
-    }
-    return (PyErr_GivenExceptionMatches(err, exc_type1) || PyErr_GivenExceptionMatches(err, exc_type2));
-}
-#endif
-
-/* CheckBinaryVersion */
-static int __Pyx_check_binary_version(void) {
-    char ctversion[4], rtversion[4];
-    PyOS_snprintf(ctversion, 4, "%d.%d", PY_MAJOR_VERSION, PY_MINOR_VERSION);
-    PyOS_snprintf(rtversion, 4, "%s", Py_GetVersion());
-    if (ctversion[0] != rtversion[0] || ctversion[2] != rtversion[2]) {
-        char message[200];
-        PyOS_snprintf(message, sizeof(message),
-                      "compiletime version %s of module '%.100s' "
-                      "does not match runtime version %s",
-                      ctversion, __Pyx_MODULE_NAME, rtversion);
-        return PyErr_WarnEx(NULL, message, 1);
-    }
-    return 0;
-}
-
-/* InitStrings */
-static int __Pyx_InitStrings(__Pyx_StringTabEntry *t) {
-    while (t->p) {
-        #if PY_MAJOR_VERSION < 3
-        if (t->is_unicode) {
-            *t->p = PyUnicode_DecodeUTF8(t->s, t->n - 1, NULL);
-        } else if (t->intern) {
-            *t->p = PyString_InternFromString(t->s);
-        } else {
-            *t->p = PyString_FromStringAndSize(t->s, t->n - 1);
-        }
-        #else
-        if (t->is_unicode | t->is_str) {
-            if (t->intern) {
-                *t->p = PyUnicode_InternFromString(t->s);
-            } else if (t->encoding) {
-                *t->p = PyUnicode_Decode(t->s, t->n - 1, t->encoding, NULL);
-            } else {
-                *t->p = PyUnicode_FromStringAndSize(t->s, t->n - 1);
-            }
-        } else {
-            *t->p = PyBytes_FromStringAndSize(t->s, t->n - 1);
-        }
-        #endif
-        if (!*t->p)
-            return -1;
-        if (PyObject_Hash(*t->p) == -1)
-            return -1;
-        ++t;
-    }
-    return 0;
-}
-
-static CYTHON_INLINE PyObject* __Pyx_PyUnicode_FromString(const char* c_str) {
-    return __Pyx_PyUnicode_FromStringAndSize(c_str, (Py_ssize_t)strlen(c_str));
-}
-static CYTHON_INLINE const char* __Pyx_PyObject_AsString(PyObject* o) {
-    Py_ssize_t ignore;
-    return __Pyx_PyObject_AsStringAndSize(o, &ignore);
-}
-#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII || __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT
-#if !CYTHON_PEP393_ENABLED
-static const char* __Pyx_PyUnicode_AsStringAndSize(PyObject* o, Py_ssize_t *length) {
-    char* defenc_c;
-    PyObject* defenc = _PyUnicode_AsDefaultEncodedString(o, NULL);
-    if (!defenc) return NULL;
-    defenc_c = PyBytes_AS_STRING(defenc);
-#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII
-    {
-        char* end = defenc_c + PyBytes_GET_SIZE(defenc);
-        char* c;
-        for (c = defenc_c; c < end; c++) {
-            if ((unsigned char) (*c) >= 128) {
-                PyUnicode_AsASCIIString(o);
-                return NULL;
-            }
-        }
-    }
-#endif
-    *length = PyBytes_GET_SIZE(defenc);
-    return defenc_c;
-}
-#else
-static CYTHON_INLINE const char* __Pyx_PyUnicode_AsStringAndSize(PyObject* o, Py_ssize_t *length) {
-    if (unlikely(__Pyx_PyUnicode_READY(o) == -1)) return NULL;
-#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII
-    if (likely(PyUnicode_IS_ASCII(o))) {
-        *length = PyUnicode_GET_LENGTH(o);
-        return PyUnicode_AsUTF8(o);
-    } else {
-        PyUnicode_AsASCIIString(o);
-        return NULL;
-    }
-#else
-    return PyUnicode_AsUTF8AndSize(o, length);
-#endif
-}
-#endif
-#endif
-static CYTHON_INLINE const char* __Pyx_PyObject_AsStringAndSize(PyObject* o, Py_ssize_t *length) {
-#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII || __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT
-    if (
-#if PY_MAJOR_VERSION < 3 && __PYX_DEFAULT_STRING_ENCODING_IS_ASCII
-            __Pyx_sys_getdefaultencoding_not_ascii &&
-#endif
-            PyUnicode_Check(o)) {
-        return __Pyx_PyUnicode_AsStringAndSize(o, length);
-    } else
-#endif
-#if (!CYTHON_COMPILING_IN_PYPY) || (defined(PyByteArray_AS_STRING) && defined(PyByteArray_GET_SIZE))
-    if (PyByteArray_Check(o)) {
-        *length = PyByteArray_GET_SIZE(o);
-        return PyByteArray_AS_STRING(o);
-    } else
-#endif
-    {
-        char* result;
-        int r = PyBytes_AsStringAndSize(o, &result, length);
-        if (unlikely(r < 0)) {
-            return NULL;
-        } else {
-            return result;
-        }
-    }
-}
-static CYTHON_INLINE int __Pyx_PyObject_IsTrue(PyObject* x) {
-   int is_true = x == Py_True;
-   if (is_true | (x == Py_False) | (x == Py_None)) return is_true;
-   else return PyObject_IsTrue(x);
-}
-static PyObject* __Pyx_PyNumber_IntOrLongWrongResultType(PyObject* result, const char* type_name) {
-#if PY_MAJOR_VERSION >= 3
-    if (PyLong_Check(result)) {
-        if (PyErr_WarnFormat(PyExc_DeprecationWarning, 1,
-                "__int__ returned non-int (type %.200s).  "
-                "The ability to return an instance of a strict subclass of int "
-                "is deprecated, and may be removed in a future version of Python.",
-                Py_TYPE(result)->tp_name)) {
-            Py_DECREF(result);
-            return NULL;
-        }
-        return result;
-    }
-#endif
-    PyErr_Format(PyExc_TypeError,
-                 "__%.4s__ returned non-%.4s (type %.200s)",
-                 type_name, type_name, Py_TYPE(result)->tp_name);
-    Py_DECREF(result);
-    return NULL;
-}
-static CYTHON_INLINE PyObject* __Pyx_PyNumber_IntOrLong(PyObject* x) {
-#if CYTHON_USE_TYPE_SLOTS
-  PyNumberMethods *m;
-#endif
-  const char *name = NULL;
-  PyObject *res = NULL;
-#if PY_MAJOR_VERSION < 3
-  if (likely(PyInt_Check(x) || PyLong_Check(x)))
-#else
-  if (likely(PyLong_Check(x)))
-#endif
-    return __Pyx_NewRef(x);
-#if CYTHON_USE_TYPE_SLOTS
-  m = Py_TYPE(x)->tp_as_number;
-  #if PY_MAJOR_VERSION < 3
-  if (m && m->nb_int) {
-    name = "int";
-    res = m->nb_int(x);
-  }
-  else if (m && m->nb_long) {
-    name = "long";
-    res = m->nb_long(x);
-  }
-  #else
-  if (likely(m && m->nb_int)) {
-    name = "int";
-    res = m->nb_int(x);
-  }
-  #endif
-#else
-  if (!PyBytes_CheckExact(x) && !PyUnicode_CheckExact(x)) {
-    res = PyNumber_Int(x);
-  }
-#endif
-  if (likely(res)) {
-#if PY_MAJOR_VERSION < 3
-    if (unlikely(!PyInt_Check(res) && !PyLong_Check(res))) {
-#else
-    if (unlikely(!PyLong_CheckExact(res))) {
-#endif
-        return __Pyx_PyNumber_IntOrLongWrongResultType(res, name);
-    }
-  }
-  else if (!PyErr_Occurred()) {
-    PyErr_SetString(PyExc_TypeError,
-                    "an integer is required");
-  }
-  return res;
-}
-static CYTHON_INLINE Py_ssize_t __Pyx_PyIndex_AsSsize_t(PyObject* b) {
-  Py_ssize_t ival;
-  PyObject *x;
-#if PY_MAJOR_VERSION < 3
-  if (likely(PyInt_CheckExact(b))) {
-    if (sizeof(Py_ssize_t) >= sizeof(long))
-        return PyInt_AS_LONG(b);
-    else
-        return PyInt_AsSsize_t(x);
-  }
-#endif
-  if (likely(PyLong_CheckExact(b))) {
-    #if CYTHON_USE_PYLONG_INTERNALS
-    const digit* digits = ((PyLongObject*)b)->ob_digit;
-    const Py_ssize_t size = Py_SIZE(b);
-    if (likely(__Pyx_sst_abs(size) <= 1)) {
-        ival = likely(size) ? digits[0] : 0;
-        if (size == -1) ival = -ival;
-        return ival;
-    } else {
-      switch (size) {
-         case 2:
-           if (8 * sizeof(Py_ssize_t) > 2 * PyLong_SHIFT) {
-             return (Py_ssize_t) (((((size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-         case -2:
-           if (8 * sizeof(Py_ssize_t) > 2 * PyLong_SHIFT) {
-             return -(Py_ssize_t) (((((size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-         case 3:
-           if (8 * sizeof(Py_ssize_t) > 3 * PyLong_SHIFT) {
-             return (Py_ssize_t) (((((((size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-         case -3:
-           if (8 * sizeof(Py_ssize_t) > 3 * PyLong_SHIFT) {
-             return -(Py_ssize_t) (((((((size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-         case 4:
-           if (8 * sizeof(Py_ssize_t) > 4 * PyLong_SHIFT) {
-             return (Py_ssize_t) (((((((((size_t)digits[3]) << PyLong_SHIFT) | (size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-         case -4:
-           if (8 * sizeof(Py_ssize_t) > 4 * PyLong_SHIFT) {
-             return -(Py_ssize_t) (((((((((size_t)digits[3]) << PyLong_SHIFT) | (size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-      }
-    }
-    #endif
-    return PyLong_AsSsize_t(b);
-  }
-  x = PyNumber_Index(b);
-  if (!x) return -1;
-  ival = PyInt_AsSsize_t(x);
-  Py_DECREF(x);
-  return ival;
-}
-static CYTHON_INLINE PyObject * __Pyx_PyBool_FromLong(long b) {
-  return b ? __Pyx_NewRef(Py_True) : __Pyx_NewRef(Py_False);
-}
-static CYTHON_INLINE PyObject * __Pyx_PyInt_FromSize_t(size_t ival) {
-    return PyInt_FromSize_t(ival);
-}
-
-
-#endif /* Py_PYTHON_H */

lakesuperior/cy_include/cytpl.c

@@ -1,2468 +0,0 @@
-/* Generated by Cython 0.28.4 */
-
-#define PY_SSIZE_T_CLEAN
-#include "Python.h"
-#ifndef Py_PYTHON_H
-    #error Python headers needed to compile C extensions, please install development version of Python.
-#elif PY_VERSION_HEX < 0x02060000 || (0x03000000 <= PY_VERSION_HEX && PY_VERSION_HEX < 0x03030000)
-    #error Cython requires Python 2.6+ or Python 3.3+.
-#else
-#define CYTHON_ABI "0_28_4"
-#define CYTHON_FUTURE_DIVISION 0
-#include <stddef.h>
-#ifndef offsetof
-  #define offsetof(type, member) ( (size_t) & ((type*)0) -> member )
-#endif
-#if !defined(WIN32) && !defined(MS_WINDOWS)
-  #ifndef __stdcall
-    #define __stdcall
-  #endif
-  #ifndef __cdecl
-    #define __cdecl
-  #endif
-  #ifndef __fastcall
-    #define __fastcall
-  #endif
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-#ifndef DL_IMPORT
-  #define DL_IMPORT(t) t
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-#ifndef DL_EXPORT
-  #define DL_EXPORT(t) t
-#endif
-#define __PYX_COMMA ,
-#ifndef HAVE_LONG_LONG
-  #if PY_VERSION_HEX >= 0x02070000
-    #define HAVE_LONG_LONG
-  #endif
-#endif
-#ifndef PY_LONG_LONG
-  #define PY_LONG_LONG LONG_LONG
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-#ifndef Py_HUGE_VAL
-  #define Py_HUGE_VAL HUGE_VAL
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-#ifdef PYPY_VERSION
-  #define CYTHON_COMPILING_IN_PYPY 1
-  #define CYTHON_COMPILING_IN_PYSTON 0
-  #define CYTHON_COMPILING_IN_CPYTHON 0
-  #undef CYTHON_USE_TYPE_SLOTS
-  #define CYTHON_USE_TYPE_SLOTS 0
-  #undef CYTHON_USE_PYTYPE_LOOKUP
-  #define CYTHON_USE_PYTYPE_LOOKUP 0
-  #if PY_VERSION_HEX < 0x03050000
-    #undef CYTHON_USE_ASYNC_SLOTS
-    #define CYTHON_USE_ASYNC_SLOTS 0
-  #elif !defined(CYTHON_USE_ASYNC_SLOTS)
-    #define CYTHON_USE_ASYNC_SLOTS 1
-  #endif
-  #undef CYTHON_USE_PYLIST_INTERNALS
-  #define CYTHON_USE_PYLIST_INTERNALS 0
-  #undef CYTHON_USE_UNICODE_INTERNALS
-  #define CYTHON_USE_UNICODE_INTERNALS 0
-  #undef CYTHON_USE_UNICODE_WRITER
-  #define CYTHON_USE_UNICODE_WRITER 0
-  #undef CYTHON_USE_PYLONG_INTERNALS
-  #define CYTHON_USE_PYLONG_INTERNALS 0
-  #undef CYTHON_AVOID_BORROWED_REFS
-  #define CYTHON_AVOID_BORROWED_REFS 1
-  #undef CYTHON_ASSUME_SAFE_MACROS
-  #define CYTHON_ASSUME_SAFE_MACROS 0
-  #undef CYTHON_UNPACK_METHODS
-  #define CYTHON_UNPACK_METHODS 0
-  #undef CYTHON_FAST_THREAD_STATE
-  #define CYTHON_FAST_THREAD_STATE 0
-  #undef CYTHON_FAST_PYCALL
-  #define CYTHON_FAST_PYCALL 0
-  #undef CYTHON_PEP489_MULTI_PHASE_INIT
-  #define CYTHON_PEP489_MULTI_PHASE_INIT 0
-  #undef CYTHON_USE_TP_FINALIZE
-  #define CYTHON_USE_TP_FINALIZE 0
-#elif defined(PYSTON_VERSION)
-  #define CYTHON_COMPILING_IN_PYPY 0
-  #define CYTHON_COMPILING_IN_PYSTON 1
-  #define CYTHON_COMPILING_IN_CPYTHON 0
-  #ifndef CYTHON_USE_TYPE_SLOTS
-    #define CYTHON_USE_TYPE_SLOTS 1
-  #endif
-  #undef CYTHON_USE_PYTYPE_LOOKUP
-  #define CYTHON_USE_PYTYPE_LOOKUP 0
-  #undef CYTHON_USE_ASYNC_SLOTS
-  #define CYTHON_USE_ASYNC_SLOTS 0
-  #undef CYTHON_USE_PYLIST_INTERNALS
-  #define CYTHON_USE_PYLIST_INTERNALS 0
-  #ifndef CYTHON_USE_UNICODE_INTERNALS
-    #define CYTHON_USE_UNICODE_INTERNALS 1
-  #endif
-  #undef CYTHON_USE_UNICODE_WRITER
-  #define CYTHON_USE_UNICODE_WRITER 0
-  #undef CYTHON_USE_PYLONG_INTERNALS
-  #define CYTHON_USE_PYLONG_INTERNALS 0
-  #ifndef CYTHON_AVOID_BORROWED_REFS
-    #define CYTHON_AVOID_BORROWED_REFS 0
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-  #ifndef CYTHON_ASSUME_SAFE_MACROS
-    #define CYTHON_ASSUME_SAFE_MACROS 1
-  #endif
-  #ifndef CYTHON_UNPACK_METHODS
-    #define CYTHON_UNPACK_METHODS 1
-  #endif
-  #undef CYTHON_FAST_THREAD_STATE
-  #define CYTHON_FAST_THREAD_STATE 0
-  #undef CYTHON_FAST_PYCALL
-  #define CYTHON_FAST_PYCALL 0
-  #undef CYTHON_PEP489_MULTI_PHASE_INIT
-  #define CYTHON_PEP489_MULTI_PHASE_INIT 0
-  #undef CYTHON_USE_TP_FINALIZE
-  #define CYTHON_USE_TP_FINALIZE 0
-#else
-  #define CYTHON_COMPILING_IN_PYPY 0
-  #define CYTHON_COMPILING_IN_PYSTON 0
-  #define CYTHON_COMPILING_IN_CPYTHON 1
-  #ifndef CYTHON_USE_TYPE_SLOTS
-    #define CYTHON_USE_TYPE_SLOTS 1
-  #endif
-  #if PY_VERSION_HEX < 0x02070000
-    #undef CYTHON_USE_PYTYPE_LOOKUP
-    #define CYTHON_USE_PYTYPE_LOOKUP 0
-  #elif !defined(CYTHON_USE_PYTYPE_LOOKUP)
-    #define CYTHON_USE_PYTYPE_LOOKUP 1
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-  #if PY_MAJOR_VERSION < 3
-    #undef CYTHON_USE_ASYNC_SLOTS
-    #define CYTHON_USE_ASYNC_SLOTS 0
-  #elif !defined(CYTHON_USE_ASYNC_SLOTS)
-    #define CYTHON_USE_ASYNC_SLOTS 1
-  #endif
-  #if PY_VERSION_HEX < 0x02070000
-    #undef CYTHON_USE_PYLONG_INTERNALS
-    #define CYTHON_USE_PYLONG_INTERNALS 0
-  #elif !defined(CYTHON_USE_PYLONG_INTERNALS)
-    #define CYTHON_USE_PYLONG_INTERNALS 1
-  #endif
-  #ifndef CYTHON_USE_PYLIST_INTERNALS
-    #define CYTHON_USE_PYLIST_INTERNALS 1
-  #endif
-  #ifndef CYTHON_USE_UNICODE_INTERNALS
-    #define CYTHON_USE_UNICODE_INTERNALS 1
-  #endif
-  #if PY_VERSION_HEX < 0x030300F0
-    #undef CYTHON_USE_UNICODE_WRITER
-    #define CYTHON_USE_UNICODE_WRITER 0
-  #elif !defined(CYTHON_USE_UNICODE_WRITER)
-    #define CYTHON_USE_UNICODE_WRITER 1
-  #endif
-  #ifndef CYTHON_AVOID_BORROWED_REFS
-    #define CYTHON_AVOID_BORROWED_REFS 0
-  #endif
-  #ifndef CYTHON_ASSUME_SAFE_MACROS
-    #define CYTHON_ASSUME_SAFE_MACROS 1
-  #endif
-  #ifndef CYTHON_UNPACK_METHODS
-    #define CYTHON_UNPACK_METHODS 1
-  #endif
-  #ifndef CYTHON_FAST_THREAD_STATE
-    #define CYTHON_FAST_THREAD_STATE 1
-  #endif
-  #ifndef CYTHON_FAST_PYCALL
-    #define CYTHON_FAST_PYCALL 1
-  #endif
-  #ifndef CYTHON_PEP489_MULTI_PHASE_INIT
-    #define CYTHON_PEP489_MULTI_PHASE_INIT (0 && PY_VERSION_HEX >= 0x03050000)
-  #endif
-  #ifndef CYTHON_USE_TP_FINALIZE
-    #define CYTHON_USE_TP_FINALIZE (PY_VERSION_HEX >= 0x030400a1)
-  #endif
-#endif
-#if !defined(CYTHON_FAST_PYCCALL)
-#define CYTHON_FAST_PYCCALL  (CYTHON_FAST_PYCALL && PY_VERSION_HEX >= 0x030600B1)
-#endif
-#if CYTHON_USE_PYLONG_INTERNALS
-  #include "longintrepr.h"
-  #undef SHIFT
-  #undef BASE
-  #undef MASK
-#endif
-#ifndef __has_attribute
-  #define __has_attribute(x) 0
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-#ifndef __has_cpp_attribute
-  #define __has_cpp_attribute(x) 0
-#endif
-#ifndef CYTHON_RESTRICT
-  #if defined(__GNUC__)
-    #define CYTHON_RESTRICT __restrict__
-  #elif defined(_MSC_VER) && _MSC_VER >= 1400
-    #define CYTHON_RESTRICT __restrict
-  #elif defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
-    #define CYTHON_RESTRICT restrict
-  #else
-    #define CYTHON_RESTRICT
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-#ifndef CYTHON_UNUSED
-# if defined(__GNUC__)
-#   if !(defined(__cplusplus)) || (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4))
-#     define CYTHON_UNUSED __attribute__ ((__unused__))
-#   else
-#     define CYTHON_UNUSED
-#   endif
-# elif defined(__ICC) || (defined(__INTEL_COMPILER) && !defined(_MSC_VER))
-#   define CYTHON_UNUSED __attribute__ ((__unused__))
-# else
-#   define CYTHON_UNUSED
-# endif
-#endif
-#ifndef CYTHON_MAYBE_UNUSED_VAR
-#  if defined(__cplusplus)
-     template<class T> void CYTHON_MAYBE_UNUSED_VAR( const T& ) { }
-#  else
-#    define CYTHON_MAYBE_UNUSED_VAR(x) (void)(x)
-#  endif
-#endif
-#ifndef CYTHON_NCP_UNUSED
-# if CYTHON_COMPILING_IN_CPYTHON
-#  define CYTHON_NCP_UNUSED
-# else
-#  define CYTHON_NCP_UNUSED CYTHON_UNUSED
-# endif
-#endif
-#define __Pyx_void_to_None(void_result) ((void)(void_result), Py_INCREF(Py_None), Py_None)
-#ifdef _MSC_VER
-    #ifndef _MSC_STDINT_H_
-        #if _MSC_VER < 1300
-           typedef unsigned char     uint8_t;
-           typedef unsigned int      uint32_t;
-        #else
-           typedef unsigned __int8   uint8_t;
-           typedef unsigned __int32  uint32_t;
-        #endif
-    #endif
-#else
-   #include <stdint.h>
-#endif
-#ifndef CYTHON_FALLTHROUGH
-  #if defined(__cplusplus) && __cplusplus >= 201103L
-    #if __has_cpp_attribute(fallthrough)
-      #define CYTHON_FALLTHROUGH [[fallthrough]]
-    #elif __has_cpp_attribute(clang::fallthrough)
-      #define CYTHON_FALLTHROUGH [[clang::fallthrough]]
-    #elif __has_cpp_attribute(gnu::fallthrough)
-      #define CYTHON_FALLTHROUGH [[gnu::fallthrough]]
-    #endif
-  #endif
-  #ifndef CYTHON_FALLTHROUGH
-    #if __has_attribute(fallthrough)
-      #define CYTHON_FALLTHROUGH __attribute__((fallthrough))
-    #else
-      #define CYTHON_FALLTHROUGH
-    #endif
-  #endif
-  #if defined(__clang__ ) && defined(__apple_build_version__)
-    #if __apple_build_version__ < 7000000
-      #undef  CYTHON_FALLTHROUGH
-      #define CYTHON_FALLTHROUGH
-    #endif
-  #endif
-#endif
-
-#ifndef CYTHON_INLINE
-  #if defined(__clang__)
-    #define CYTHON_INLINE __inline__ __attribute__ ((__unused__))
-  #elif defined(__GNUC__)
-    #define CYTHON_INLINE __inline__
-  #elif defined(_MSC_VER)
-    #define CYTHON_INLINE __inline
-  #elif defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
-    #define CYTHON_INLINE inline
-  #else
-    #define CYTHON_INLINE
-  #endif
-#endif
-
-#if CYTHON_COMPILING_IN_PYPY && PY_VERSION_HEX < 0x02070600 && !defined(Py_OptimizeFlag)
-  #define Py_OptimizeFlag 0
-#endif
-#define __PYX_BUILD_PY_SSIZE_T "n"
-#define CYTHON_FORMAT_SSIZE_T "z"
-#if PY_MAJOR_VERSION < 3
-  #define __Pyx_BUILTIN_MODULE_NAME "__builtin__"
-  #define __Pyx_PyCode_New(a, k, l, s, f, code, c, n, v, fv, cell, fn, name, fline, lnos)\
-          PyCode_New(a+k, l, s, f, code, c, n, v, fv, cell, fn, name, fline, lnos)
-  #define __Pyx_DefaultClassType PyClass_Type
-#else
-  #define __Pyx_BUILTIN_MODULE_NAME "builtins"
-  #define __Pyx_PyCode_New(a, k, l, s, f, code, c, n, v, fv, cell, fn, name, fline, lnos)\
-          PyCode_New(a, k, l, s, f, code, c, n, v, fv, cell, fn, name, fline, lnos)
-  #define __Pyx_DefaultClassType PyType_Type
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-#ifndef Py_TPFLAGS_CHECKTYPES
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-#ifndef Py_TPFLAGS_HAVE_INDEX
-  #define Py_TPFLAGS_HAVE_INDEX 0
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-#ifndef Py_TPFLAGS_HAVE_NEWBUFFER
-  #define Py_TPFLAGS_HAVE_NEWBUFFER 0
-#endif
-#ifndef Py_TPFLAGS_HAVE_FINALIZE
-  #define Py_TPFLAGS_HAVE_FINALIZE 0
-#endif
-#if PY_VERSION_HEX <= 0x030700A3 || !defined(METH_FASTCALL)
-  #ifndef METH_FASTCALL
-     #define METH_FASTCALL 0x80
-  #endif
-  typedef PyObject *(*__Pyx_PyCFunctionFast) (PyObject *self, PyObject *const *args, Py_ssize_t nargs);
-  typedef PyObject *(*__Pyx_PyCFunctionFastWithKeywords) (PyObject *self, PyObject *const *args,
-                                                          Py_ssize_t nargs, PyObject *kwnames);
-#else
-  #define __Pyx_PyCFunctionFast _PyCFunctionFast
-  #define __Pyx_PyCFunctionFastWithKeywords _PyCFunctionFastWithKeywords
-#endif
-#if CYTHON_FAST_PYCCALL
-#define __Pyx_PyFastCFunction_Check(func)\
-    ((PyCFunction_Check(func) && (METH_FASTCALL == (PyCFunction_GET_FLAGS(func) & ~(METH_CLASS | METH_STATIC | METH_COEXIST | METH_KEYWORDS)))))
-#else
-#define __Pyx_PyFastCFunction_Check(func) 0
-#endif
-#if CYTHON_COMPILING_IN_PYPY && !defined(PyObject_Malloc)
-  #define PyObject_Malloc(s)   PyMem_Malloc(s)
-  #define PyObject_Free(p)     PyMem_Free(p)
-  #define PyObject_Realloc(p)  PyMem_Realloc(p)
-#endif
-#if CYTHON_COMPILING_IN_PYSTON
-  #define __Pyx_PyCode_HasFreeVars(co)  PyCode_HasFreeVars(co)
-  #define __Pyx_PyFrame_SetLineNumber(frame, lineno) PyFrame_SetLineNumber(frame, lineno)
-#else
-  #define __Pyx_PyCode_HasFreeVars(co)  (PyCode_GetNumFree(co) > 0)
-  #define __Pyx_PyFrame_SetLineNumber(frame, lineno)  (frame)->f_lineno = (lineno)
-#endif
-#if !CYTHON_FAST_THREAD_STATE || PY_VERSION_HEX < 0x02070000
-  #define __Pyx_PyThreadState_Current PyThreadState_GET()
-#elif PY_VERSION_HEX >= 0x03060000
-  #define __Pyx_PyThreadState_Current _PyThreadState_UncheckedGet()
-#elif PY_VERSION_HEX >= 0x03000000
-  #define __Pyx_PyThreadState_Current PyThreadState_GET()
-#else
-  #define __Pyx_PyThreadState_Current _PyThreadState_Current
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-#if PY_VERSION_HEX < 0x030700A2 && !defined(PyThread_tss_create) && !defined(Py_tss_NEEDS_INIT)
-#include "pythread.h"
-#define Py_tss_NEEDS_INIT 0
-typedef int Py_tss_t;
-static CYTHON_INLINE int PyThread_tss_create(Py_tss_t *key) {
-  *key = PyThread_create_key();
-  return 0; // PyThread_create_key reports success always
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-static CYTHON_INLINE Py_tss_t * PyThread_tss_alloc(void) {
-  Py_tss_t *key = (Py_tss_t *)PyObject_Malloc(sizeof(Py_tss_t));
-  *key = Py_tss_NEEDS_INIT;
-  return key;
-}
-static CYTHON_INLINE void PyThread_tss_free(Py_tss_t *key) {
-  PyObject_Free(key);
-}
-static CYTHON_INLINE int PyThread_tss_is_created(Py_tss_t *key) {
-  return *key != Py_tss_NEEDS_INIT;
-}
-static CYTHON_INLINE void PyThread_tss_delete(Py_tss_t *key) {
-  PyThread_delete_key(*key);
-  *key = Py_tss_NEEDS_INIT;
-}
-static CYTHON_INLINE int PyThread_tss_set(Py_tss_t *key, void *value) {
-  return PyThread_set_key_value(*key, value);
-}
-static CYTHON_INLINE void * PyThread_tss_get(Py_tss_t *key) {
-  return PyThread_get_key_value(*key);
-}
-#endif // TSS (Thread Specific Storage) API
-#if CYTHON_COMPILING_IN_CPYTHON || defined(_PyDict_NewPresized)
-#define __Pyx_PyDict_NewPresized(n)  ((n <= 8) ? PyDict_New() : _PyDict_NewPresized(n))
-#else
-#define __Pyx_PyDict_NewPresized(n)  PyDict_New()
-#endif
-#if PY_MAJOR_VERSION >= 3 || CYTHON_FUTURE_DIVISION
-  #define __Pyx_PyNumber_Divide(x,y)         PyNumber_TrueDivide(x,y)
-  #define __Pyx_PyNumber_InPlaceDivide(x,y)  PyNumber_InPlaceTrueDivide(x,y)
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-  #define __Pyx_PyNumber_Divide(x,y)         PyNumber_Divide(x,y)
-  #define __Pyx_PyNumber_InPlaceDivide(x,y)  PyNumber_InPlaceDivide(x,y)
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-#if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x030500A1 && CYTHON_USE_UNICODE_INTERNALS
-#define __Pyx_PyDict_GetItemStr(dict, name)  _PyDict_GetItem_KnownHash(dict, name, ((PyASCIIObject *) name)->hash)
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-#define __Pyx_PyDict_GetItemStr(dict, name)  PyDict_GetItem(dict, name)
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-#if PY_VERSION_HEX > 0x03030000 && defined(PyUnicode_KIND)
-  #define CYTHON_PEP393_ENABLED 1
-  #define __Pyx_PyUnicode_READY(op)       (likely(PyUnicode_IS_READY(op)) ?\
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-  #define __Pyx_PyUnicode_GET_LENGTH(u)   PyUnicode_GET_LENGTH(u)
-  #define __Pyx_PyUnicode_READ_CHAR(u, i) PyUnicode_READ_CHAR(u, i)
-  #define __Pyx_PyUnicode_MAX_CHAR_VALUE(u)   PyUnicode_MAX_CHAR_VALUE(u)
-  #define __Pyx_PyUnicode_KIND(u)         PyUnicode_KIND(u)
-  #define __Pyx_PyUnicode_DATA(u)         PyUnicode_DATA(u)
-  #define __Pyx_PyUnicode_READ(k, d, i)   PyUnicode_READ(k, d, i)
-  #define __Pyx_PyUnicode_WRITE(k, d, i, ch)  PyUnicode_WRITE(k, d, i, ch)
-  #define __Pyx_PyUnicode_IS_TRUE(u)      (0 != (likely(PyUnicode_IS_READY(u)) ? PyUnicode_GET_LENGTH(u) : PyUnicode_GET_SIZE(u)))
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-  #define CYTHON_PEP393_ENABLED 0
-  #define PyUnicode_1BYTE_KIND  1
-  #define PyUnicode_2BYTE_KIND  2
-  #define PyUnicode_4BYTE_KIND  4
-  #define __Pyx_PyUnicode_READY(op)       (0)
-  #define __Pyx_PyUnicode_GET_LENGTH(u)   PyUnicode_GET_SIZE(u)
-  #define __Pyx_PyUnicode_READ_CHAR(u, i) ((Py_UCS4)(PyUnicode_AS_UNICODE(u)[i]))
-  #define __Pyx_PyUnicode_MAX_CHAR_VALUE(u)   ((sizeof(Py_UNICODE) == 2) ? 65535 : 1114111)
-  #define __Pyx_PyUnicode_KIND(u)         (sizeof(Py_UNICODE))
-  #define __Pyx_PyUnicode_DATA(u)         ((void*)PyUnicode_AS_UNICODE(u))
-  #define __Pyx_PyUnicode_READ(k, d, i)   ((void)(k), (Py_UCS4)(((Py_UNICODE*)d)[i]))
-  #define __Pyx_PyUnicode_WRITE(k, d, i, ch)  (((void)(k)), ((Py_UNICODE*)d)[i] = ch)
-  #define __Pyx_PyUnicode_IS_TRUE(u)      (0 != PyUnicode_GET_SIZE(u))
-#endif
-#if CYTHON_COMPILING_IN_PYPY
-  #define __Pyx_PyUnicode_Concat(a, b)      PyNumber_Add(a, b)
-  #define __Pyx_PyUnicode_ConcatSafe(a, b)  PyNumber_Add(a, b)
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-  #define __Pyx_PyUnicode_Concat(a, b)      PyUnicode_Concat(a, b)
-  #define __Pyx_PyUnicode_ConcatSafe(a, b)  ((unlikely((a) == Py_None) || unlikely((b) == Py_None)) ?\
-      PyNumber_Add(a, b) : __Pyx_PyUnicode_Concat(a, b))
-#endif
-#if CYTHON_COMPILING_IN_PYPY && !defined(PyUnicode_Contains)
-  #define PyUnicode_Contains(u, s)  PySequence_Contains(u, s)
-#endif
-#if CYTHON_COMPILING_IN_PYPY && !defined(PyByteArray_Check)
-  #define PyByteArray_Check(obj)  PyObject_TypeCheck(obj, &PyByteArray_Type)
-#endif
-#if CYTHON_COMPILING_IN_PYPY && !defined(PyObject_Format)
-  #define PyObject_Format(obj, fmt)  PyObject_CallMethod(obj, "__format__", "O", fmt)
-#endif
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-#if defined(PYREX_WITHOUT_ASSERTIONS) && !defined(CYTHON_WITHOUT_ASSERTIONS)
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-    #define __Pyx_PyStr_FromString        __Pyx_PyBytes_FromString
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-    tstate->curexc_type = 0;
-    tstate->curexc_value = 0;
-    tstate->curexc_traceback = 0;
-}
-#endif
-
-/* CLineInTraceback */
-#ifndef CYTHON_CLINE_IN_TRACEBACK
-static int __Pyx_CLineForTraceback(CYTHON_UNUSED PyThreadState *tstate, int c_line) {
-    PyObject *use_cline;
-    PyObject *ptype, *pvalue, *ptraceback;
-#if CYTHON_COMPILING_IN_CPYTHON
-    PyObject **cython_runtime_dict;
-#endif
-    if (unlikely(!__pyx_cython_runtime)) {
-        return c_line;
-    }
-    __Pyx_ErrFetchInState(tstate, &ptype, &pvalue, &ptraceback);
-#if CYTHON_COMPILING_IN_CPYTHON
-    cython_runtime_dict = _PyObject_GetDictPtr(__pyx_cython_runtime);
-    if (likely(cython_runtime_dict)) {
-      use_cline = __Pyx_PyDict_GetItemStr(*cython_runtime_dict, __pyx_n_s_cline_in_traceback);
-    } else
-#endif
-    {
-      PyObject *use_cline_obj = __Pyx_PyObject_GetAttrStr(__pyx_cython_runtime, __pyx_n_s_cline_in_traceback);
-      if (use_cline_obj) {
-        use_cline = PyObject_Not(use_cline_obj) ? Py_False : Py_True;
-        Py_DECREF(use_cline_obj);
-      } else {
-        PyErr_Clear();
-        use_cline = NULL;
-      }
-    }
-    if (!use_cline) {
-        c_line = 0;
-        PyObject_SetAttr(__pyx_cython_runtime, __pyx_n_s_cline_in_traceback, Py_False);
-    }
-    else if (PyObject_Not(use_cline) != 0) {
-        c_line = 0;
-    }
-    __Pyx_ErrRestoreInState(tstate, ptype, pvalue, ptraceback);
-    return c_line;
-}
-#endif
-
-/* CodeObjectCache */
-static int __pyx_bisect_code_objects(__Pyx_CodeObjectCacheEntry* entries, int count, int code_line) {
-    int start = 0, mid = 0, end = count - 1;
-    if (end >= 0 && code_line > entries[end].code_line) {
-        return count;
-    }
-    while (start < end) {
-        mid = start + (end - start) / 2;
-        if (code_line < entries[mid].code_line) {
-            end = mid;
-        } else if (code_line > entries[mid].code_line) {
-             start = mid + 1;
-        } else {
-            return mid;
-        }
-    }
-    if (code_line <= entries[mid].code_line) {
-        return mid;
-    } else {
-        return mid + 1;
-    }
-}
-static PyCodeObject *__pyx_find_code_object(int code_line) {
-    PyCodeObject* code_object;
-    int pos;
-    if (unlikely(!code_line) || unlikely(!__pyx_code_cache.entries)) {
-        return NULL;
-    }
-    pos = __pyx_bisect_code_objects(__pyx_code_cache.entries, __pyx_code_cache.count, code_line);
-    if (unlikely(pos >= __pyx_code_cache.count) || unlikely(__pyx_code_cache.entries[pos].code_line != code_line)) {
-        return NULL;
-    }
-    code_object = __pyx_code_cache.entries[pos].code_object;
-    Py_INCREF(code_object);
-    return code_object;
-}
-static void __pyx_insert_code_object(int code_line, PyCodeObject* code_object) {
-    int pos, i;
-    __Pyx_CodeObjectCacheEntry* entries = __pyx_code_cache.entries;
-    if (unlikely(!code_line)) {
-        return;
-    }
-    if (unlikely(!entries)) {
-        entries = (__Pyx_CodeObjectCacheEntry*)PyMem_Malloc(64*sizeof(__Pyx_CodeObjectCacheEntry));
-        if (likely(entries)) {
-            __pyx_code_cache.entries = entries;
-            __pyx_code_cache.max_count = 64;
-            __pyx_code_cache.count = 1;
-            entries[0].code_line = code_line;
-            entries[0].code_object = code_object;
-            Py_INCREF(code_object);
-        }
-        return;
-    }
-    pos = __pyx_bisect_code_objects(__pyx_code_cache.entries, __pyx_code_cache.count, code_line);
-    if ((pos < __pyx_code_cache.count) && unlikely(__pyx_code_cache.entries[pos].code_line == code_line)) {
-        PyCodeObject* tmp = entries[pos].code_object;
-        entries[pos].code_object = code_object;
-        Py_DECREF(tmp);
-        return;
-    }
-    if (__pyx_code_cache.count == __pyx_code_cache.max_count) {
-        int new_max = __pyx_code_cache.max_count + 64;
-        entries = (__Pyx_CodeObjectCacheEntry*)PyMem_Realloc(
-            __pyx_code_cache.entries, (size_t)new_max*sizeof(__Pyx_CodeObjectCacheEntry));
-        if (unlikely(!entries)) {
-            return;
-        }
-        __pyx_code_cache.entries = entries;
-        __pyx_code_cache.max_count = new_max;
-    }
-    for (i=__pyx_code_cache.count; i>pos; i--) {
-        entries[i] = entries[i-1];
-    }
-    entries[pos].code_line = code_line;
-    entries[pos].code_object = code_object;
-    __pyx_code_cache.count++;
-    Py_INCREF(code_object);
-}
-
-/* AddTraceback */
-#include "compile.h"
-#include "frameobject.h"
-#include "traceback.h"
-static PyCodeObject* __Pyx_CreateCodeObjectForTraceback(
-            const char *funcname, int c_line,
-            int py_line, const char *filename) {
-    PyCodeObject *py_code = 0;
-    PyObject *py_srcfile = 0;
-    PyObject *py_funcname = 0;
-    #if PY_MAJOR_VERSION < 3
-    py_srcfile = PyString_FromString(filename);
-    #else
-    py_srcfile = PyUnicode_FromString(filename);
-    #endif
-    if (!py_srcfile) goto bad;
-    if (c_line) {
-        #if PY_MAJOR_VERSION < 3
-        py_funcname = PyString_FromFormat( "%s (%s:%d)", funcname, __pyx_cfilenm, c_line);
-        #else
-        py_funcname = PyUnicode_FromFormat( "%s (%s:%d)", funcname, __pyx_cfilenm, c_line);
-        #endif
-    }
-    else {
-        #if PY_MAJOR_VERSION < 3
-        py_funcname = PyString_FromString(funcname);
-        #else
-        py_funcname = PyUnicode_FromString(funcname);
-        #endif
-    }
-    if (!py_funcname) goto bad;
-    py_code = __Pyx_PyCode_New(
-        0,
-        0,
-        0,
-        0,
-        0,
-        __pyx_empty_bytes, /*PyObject *code,*/
-        __pyx_empty_tuple, /*PyObject *consts,*/
-        __pyx_empty_tuple, /*PyObject *names,*/
-        __pyx_empty_tuple, /*PyObject *varnames,*/
-        __pyx_empty_tuple, /*PyObject *freevars,*/
-        __pyx_empty_tuple, /*PyObject *cellvars,*/
-        py_srcfile,   /*PyObject *filename,*/
-        py_funcname,  /*PyObject *name,*/
-        py_line,
-        __pyx_empty_bytes  /*PyObject *lnotab*/
-    );
-    Py_DECREF(py_srcfile);
-    Py_DECREF(py_funcname);
-    return py_code;
-bad:
-    Py_XDECREF(py_srcfile);
-    Py_XDECREF(py_funcname);
-    return NULL;
-}
-static void __Pyx_AddTraceback(const char *funcname, int c_line,
-                               int py_line, const char *filename) {
-    PyCodeObject *py_code = 0;
-    PyFrameObject *py_frame = 0;
-    PyThreadState *tstate = __Pyx_PyThreadState_Current;
-    if (c_line) {
-        c_line = __Pyx_CLineForTraceback(tstate, c_line);
-    }
-    py_code = __pyx_find_code_object(c_line ? -c_line : py_line);
-    if (!py_code) {
-        py_code = __Pyx_CreateCodeObjectForTraceback(
-            funcname, c_line, py_line, filename);
-        if (!py_code) goto bad;
-        __pyx_insert_code_object(c_line ? -c_line : py_line, py_code);
-    }
-    py_frame = PyFrame_New(
-        tstate,            /*PyThreadState *tstate,*/
-        py_code,           /*PyCodeObject *code,*/
-        __pyx_d,    /*PyObject *globals,*/
-        0                  /*PyObject *locals*/
-    );
-    if (!py_frame) goto bad;
-    __Pyx_PyFrame_SetLineNumber(py_frame, py_line);
-    PyTraceBack_Here(py_frame);
-bad:
-    Py_XDECREF(py_code);
-    Py_XDECREF(py_frame);
-}
-
-/* CIntToPy */
-static CYTHON_INLINE PyObject* __Pyx_PyInt_From_long(long value) {
-    const long neg_one = (long) -1, const_zero = (long) 0;
-    const int is_unsigned = neg_one > const_zero;
-    if (is_unsigned) {
-        if (sizeof(long) < sizeof(long)) {
-            return PyInt_FromLong((long) value);
-        } else if (sizeof(long) <= sizeof(unsigned long)) {
-            return PyLong_FromUnsignedLong((unsigned long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(long) <= sizeof(unsigned PY_LONG_LONG)) {
-            return PyLong_FromUnsignedLongLong((unsigned PY_LONG_LONG) value);
-#endif
-        }
-    } else {
-        if (sizeof(long) <= sizeof(long)) {
-            return PyInt_FromLong((long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(long) <= sizeof(PY_LONG_LONG)) {
-            return PyLong_FromLongLong((PY_LONG_LONG) value);
-#endif
-        }
-    }
-    {
-        int one = 1; int little = (int)*(unsigned char *)&one;
-        unsigned char *bytes = (unsigned char *)&value;
-        return _PyLong_FromByteArray(bytes, sizeof(long),
-                                     little, !is_unsigned);
-    }
-}
-
-/* CIntFromPyVerify */
-#define __PYX_VERIFY_RETURN_INT(target_type, func_type, func_value)\
-    __PYX__VERIFY_RETURN_INT(target_type, func_type, func_value, 0)
-#define __PYX_VERIFY_RETURN_INT_EXC(target_type, func_type, func_value)\
-    __PYX__VERIFY_RETURN_INT(target_type, func_type, func_value, 1)
-#define __PYX__VERIFY_RETURN_INT(target_type, func_type, func_value, exc)\
-    {\
-        func_type value = func_value;\
-        if (sizeof(target_type) < sizeof(func_type)) {\
-            if (unlikely(value != (func_type) (target_type) value)) {\
-                func_type zero = 0;\
-                if (exc && unlikely(value == (func_type)-1 && PyErr_Occurred()))\
-                    return (target_type) -1;\
-                if (is_unsigned && unlikely(value < zero))\
-                    goto raise_neg_overflow;\
-                else\
-                    goto raise_overflow;\
-            }\
-        }\
-        return (target_type) value;\
-    }
-
-/* CIntFromPy */
-static CYTHON_INLINE long __Pyx_PyInt_As_long(PyObject *x) {
-    const long neg_one = (long) -1, const_zero = (long) 0;
-    const int is_unsigned = neg_one > const_zero;
-#if PY_MAJOR_VERSION < 3
-    if (likely(PyInt_Check(x))) {
-        if (sizeof(long) < sizeof(long)) {
-            __PYX_VERIFY_RETURN_INT(long, long, PyInt_AS_LONG(x))
-        } else {
-            long val = PyInt_AS_LONG(x);
-            if (is_unsigned && unlikely(val < 0)) {
-                goto raise_neg_overflow;
-            }
-            return (long) val;
-        }
-    } else
-#endif
-    if (likely(PyLong_Check(x))) {
-        if (is_unsigned) {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (long) 0;
-                case  1: __PYX_VERIFY_RETURN_INT(long, digit, digits[0])
-                case 2:
-                    if (8 * sizeof(long) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) >= 2 * PyLong_SHIFT) {
-                            return (long) (((((long)digits[1]) << PyLong_SHIFT) | (long)digits[0]));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(long) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) >= 3 * PyLong_SHIFT) {
-                            return (long) (((((((long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0]));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(long) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) >= 4 * PyLong_SHIFT) {
-                            return (long) (((((((((long)digits[3]) << PyLong_SHIFT) | (long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0]));
-                        }
-                    }
-                    break;
-            }
-#endif
-#if CYTHON_COMPILING_IN_CPYTHON
-            if (unlikely(Py_SIZE(x) < 0)) {
-                goto raise_neg_overflow;
-            }
-#else
-            {
-                int result = PyObject_RichCompareBool(x, Py_False, Py_LT);
-                if (unlikely(result < 0))
-                    return (long) -1;
-                if (unlikely(result == 1))
-                    goto raise_neg_overflow;
-            }
-#endif
-            if (sizeof(long) <= sizeof(unsigned long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(long, unsigned long, PyLong_AsUnsignedLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(long) <= sizeof(unsigned PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(long, unsigned PY_LONG_LONG, PyLong_AsUnsignedLongLong(x))
-#endif
-            }
-        } else {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (long) 0;
-                case -1: __PYX_VERIFY_RETURN_INT(long, sdigit, (sdigit) (-(sdigit)digits[0]))
-                case  1: __PYX_VERIFY_RETURN_INT(long,  digit, +digits[0])
-                case -2:
-                    if (8 * sizeof(long) - 1 > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, long, -(long) (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 2 * PyLong_SHIFT) {
-                            return (long) (((long)-1)*(((((long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-                case 2:
-                    if (8 * sizeof(long) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 2 * PyLong_SHIFT) {
-                            return (long) ((((((long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-                case -3:
-                    if (8 * sizeof(long) - 1 > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, long, -(long) (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 3 * PyLong_SHIFT) {
-                            return (long) (((long)-1)*(((((((long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(long) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 3 * PyLong_SHIFT) {
-                            return (long) ((((((((long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-                case -4:
-                    if (8 * sizeof(long) - 1 > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, long, -(long) (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 4 * PyLong_SHIFT) {
-                            return (long) (((long)-1)*(((((((((long)digits[3]) << PyLong_SHIFT) | (long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(long) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 4 * PyLong_SHIFT) {
-                            return (long) ((((((((((long)digits[3]) << PyLong_SHIFT) | (long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-            }
-#endif
-            if (sizeof(long) <= sizeof(long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(long, long, PyLong_AsLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(long) <= sizeof(PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(long, PY_LONG_LONG, PyLong_AsLongLong(x))
-#endif
-            }
-        }
-        {
-#if CYTHON_COMPILING_IN_PYPY && !defined(_PyLong_AsByteArray)
-            PyErr_SetString(PyExc_RuntimeError,
-                            "_PyLong_AsByteArray() not available in PyPy, cannot convert large numbers");
-#else
-            long val;
-            PyObject *v = __Pyx_PyNumber_IntOrLong(x);
- #if PY_MAJOR_VERSION < 3
-            if (likely(v) && !PyLong_Check(v)) {
-                PyObject *tmp = v;
-                v = PyNumber_Long(tmp);
-                Py_DECREF(tmp);
-            }
- #endif
-            if (likely(v)) {
-                int one = 1; int is_little = (int)*(unsigned char *)&one;
-                unsigned char *bytes = (unsigned char *)&val;
-                int ret = _PyLong_AsByteArray((PyLongObject *)v,
-                                              bytes, sizeof(val),
-                                              is_little, !is_unsigned);
-                Py_DECREF(v);
-                if (likely(!ret))
-                    return val;
-            }
-#endif
-            return (long) -1;
-        }
-    } else {
-        long val;
-        PyObject *tmp = __Pyx_PyNumber_IntOrLong(x);
-        if (!tmp) return (long) -1;
-        val = __Pyx_PyInt_As_long(tmp);
-        Py_DECREF(tmp);
-        return val;
-    }
-raise_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "value too large to convert to long");
-    return (long) -1;
-raise_neg_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "can't convert negative value to long");
-    return (long) -1;
-}
-
-/* CIntFromPy */
-static CYTHON_INLINE int __Pyx_PyInt_As_int(PyObject *x) {
-    const int neg_one = (int) -1, const_zero = (int) 0;
-    const int is_unsigned = neg_one > const_zero;
-#if PY_MAJOR_VERSION < 3
-    if (likely(PyInt_Check(x))) {
-        if (sizeof(int) < sizeof(long)) {
-            __PYX_VERIFY_RETURN_INT(int, long, PyInt_AS_LONG(x))
-        } else {
-            long val = PyInt_AS_LONG(x);
-            if (is_unsigned && unlikely(val < 0)) {
-                goto raise_neg_overflow;
-            }
-            return (int) val;
-        }
-    } else
-#endif
-    if (likely(PyLong_Check(x))) {
-        if (is_unsigned) {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (int) 0;
-                case  1: __PYX_VERIFY_RETURN_INT(int, digit, digits[0])
-                case 2:
-                    if (8 * sizeof(int) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) >= 2 * PyLong_SHIFT) {
-                            return (int) (((((int)digits[1]) << PyLong_SHIFT) | (int)digits[0]));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(int) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) >= 3 * PyLong_SHIFT) {
-                            return (int) (((((((int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0]));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(int) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) >= 4 * PyLong_SHIFT) {
-                            return (int) (((((((((int)digits[3]) << PyLong_SHIFT) | (int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0]));
-                        }
-                    }
-                    break;
-            }
-#endif
-#if CYTHON_COMPILING_IN_CPYTHON
-            if (unlikely(Py_SIZE(x) < 0)) {
-                goto raise_neg_overflow;
-            }
-#else
-            {
-                int result = PyObject_RichCompareBool(x, Py_False, Py_LT);
-                if (unlikely(result < 0))
-                    return (int) -1;
-                if (unlikely(result == 1))
-                    goto raise_neg_overflow;
-            }
-#endif
-            if (sizeof(int) <= sizeof(unsigned long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(int, unsigned long, PyLong_AsUnsignedLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(int) <= sizeof(unsigned PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(int, unsigned PY_LONG_LONG, PyLong_AsUnsignedLongLong(x))
-#endif
-            }
-        } else {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (int) 0;
-                case -1: __PYX_VERIFY_RETURN_INT(int, sdigit, (sdigit) (-(sdigit)digits[0]))
-                case  1: __PYX_VERIFY_RETURN_INT(int,  digit, +digits[0])
-                case -2:
-                    if (8 * sizeof(int) - 1 > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, long, -(long) (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 2 * PyLong_SHIFT) {
-                            return (int) (((int)-1)*(((((int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-                case 2:
-                    if (8 * sizeof(int) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 2 * PyLong_SHIFT) {
-                            return (int) ((((((int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-                case -3:
-                    if (8 * sizeof(int) - 1 > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, long, -(long) (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 3 * PyLong_SHIFT) {
-                            return (int) (((int)-1)*(((((((int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(int) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 3 * PyLong_SHIFT) {
-                            return (int) ((((((((int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-                case -4:
-                    if (8 * sizeof(int) - 1 > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, long, -(long) (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 4 * PyLong_SHIFT) {
-                            return (int) (((int)-1)*(((((((((int)digits[3]) << PyLong_SHIFT) | (int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(int) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 4 * PyLong_SHIFT) {
-                            return (int) ((((((((((int)digits[3]) << PyLong_SHIFT) | (int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-            }
-#endif
-            if (sizeof(int) <= sizeof(long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(int, long, PyLong_AsLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(int) <= sizeof(PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(int, PY_LONG_LONG, PyLong_AsLongLong(x))
-#endif
-            }
-        }
-        {
-#if CYTHON_COMPILING_IN_PYPY && !defined(_PyLong_AsByteArray)
-            PyErr_SetString(PyExc_RuntimeError,
-                            "_PyLong_AsByteArray() not available in PyPy, cannot convert large numbers");
-#else
-            int val;
-            PyObject *v = __Pyx_PyNumber_IntOrLong(x);
- #if PY_MAJOR_VERSION < 3
-            if (likely(v) && !PyLong_Check(v)) {
-                PyObject *tmp = v;
-                v = PyNumber_Long(tmp);
-                Py_DECREF(tmp);
-            }
- #endif
-            if (likely(v)) {
-                int one = 1; int is_little = (int)*(unsigned char *)&one;
-                unsigned char *bytes = (unsigned char *)&val;
-                int ret = _PyLong_AsByteArray((PyLongObject *)v,
-                                              bytes, sizeof(val),
-                                              is_little, !is_unsigned);
-                Py_DECREF(v);
-                if (likely(!ret))
-                    return val;
-            }
-#endif
-            return (int) -1;
-        }
-    } else {
-        int val;
-        PyObject *tmp = __Pyx_PyNumber_IntOrLong(x);
-        if (!tmp) return (int) -1;
-        val = __Pyx_PyInt_As_int(tmp);
-        Py_DECREF(tmp);
-        return val;
-    }
-raise_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "value too large to convert to int");
-    return (int) -1;
-raise_neg_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "can't convert negative value to int");
-    return (int) -1;
-}
-
-/* FastTypeChecks */
-#if CYTHON_COMPILING_IN_CPYTHON
-static int __Pyx_InBases(PyTypeObject *a, PyTypeObject *b) {
-    while (a) {
-        a = a->tp_base;
-        if (a == b)
-            return 1;
-    }
-    return b == &PyBaseObject_Type;
-}
-static CYTHON_INLINE int __Pyx_IsSubtype(PyTypeObject *a, PyTypeObject *b) {
-    PyObject *mro;
-    if (a == b) return 1;
-    mro = a->tp_mro;
-    if (likely(mro)) {
-        Py_ssize_t i, n;
-        n = PyTuple_GET_SIZE(mro);
-        for (i = 0; i < n; i++) {
-            if (PyTuple_GET_ITEM(mro, i) == (PyObject *)b)
-                return 1;
-        }
-        return 0;
-    }
-    return __Pyx_InBases(a, b);
-}
-#if PY_MAJOR_VERSION == 2
-static int __Pyx_inner_PyErr_GivenExceptionMatches2(PyObject *err, PyObject* exc_type1, PyObject* exc_type2) {
-    PyObject *exception, *value, *tb;
-    int res;
-    __Pyx_PyThreadState_declare
-    __Pyx_PyThreadState_assign
-    __Pyx_ErrFetch(&exception, &value, &tb);
-    res = exc_type1 ? PyObject_IsSubclass(err, exc_type1) : 0;
-    if (unlikely(res == -1)) {
-        PyErr_WriteUnraisable(err);
-        res = 0;
-    }
-    if (!res) {
-        res = PyObject_IsSubclass(err, exc_type2);
-        if (unlikely(res == -1)) {
-            PyErr_WriteUnraisable(err);
-            res = 0;
-        }
-    }
-    __Pyx_ErrRestore(exception, value, tb);
-    return res;
-}
-#else
-static CYTHON_INLINE int __Pyx_inner_PyErr_GivenExceptionMatches2(PyObject *err, PyObject* exc_type1, PyObject *exc_type2) {
-    int res = exc_type1 ? __Pyx_IsSubtype((PyTypeObject*)err, (PyTypeObject*)exc_type1) : 0;
-    if (!res) {
-        res = __Pyx_IsSubtype((PyTypeObject*)err, (PyTypeObject*)exc_type2);
-    }
-    return res;
-}
-#endif
-static int __Pyx_PyErr_GivenExceptionMatchesTuple(PyObject *exc_type, PyObject *tuple) {
-    Py_ssize_t i, n;
-    assert(PyExceptionClass_Check(exc_type));
-    n = PyTuple_GET_SIZE(tuple);
-#if PY_MAJOR_VERSION >= 3
-    for (i=0; i<n; i++) {
-        if (exc_type == PyTuple_GET_ITEM(tuple, i)) return 1;
-    }
-#endif
-    for (i=0; i<n; i++) {
-        PyObject *t = PyTuple_GET_ITEM(tuple, i);
-        #if PY_MAJOR_VERSION < 3
-        if (likely(exc_type == t)) return 1;
-        #endif
-        if (likely(PyExceptionClass_Check(t))) {
-            if (__Pyx_inner_PyErr_GivenExceptionMatches2(exc_type, NULL, t)) return 1;
-        } else {
-        }
-    }
-    return 0;
-}
-static CYTHON_INLINE int __Pyx_PyErr_GivenExceptionMatches(PyObject *err, PyObject* exc_type) {
-    if (likely(err == exc_type)) return 1;
-    if (likely(PyExceptionClass_Check(err))) {
-        if (likely(PyExceptionClass_Check(exc_type))) {
-            return __Pyx_inner_PyErr_GivenExceptionMatches2(err, NULL, exc_type);
-        } else if (likely(PyTuple_Check(exc_type))) {
-            return __Pyx_PyErr_GivenExceptionMatchesTuple(err, exc_type);
-        } else {
-        }
-    }
-    return PyErr_GivenExceptionMatches(err, exc_type);
-}
-static CYTHON_INLINE int __Pyx_PyErr_GivenExceptionMatches2(PyObject *err, PyObject *exc_type1, PyObject *exc_type2) {
-    assert(PyExceptionClass_Check(exc_type1));
-    assert(PyExceptionClass_Check(exc_type2));
-    if (likely(err == exc_type1 || err == exc_type2)) return 1;
-    if (likely(PyExceptionClass_Check(err))) {
-        return __Pyx_inner_PyErr_GivenExceptionMatches2(err, exc_type1, exc_type2);
-    }
-    return (PyErr_GivenExceptionMatches(err, exc_type1) || PyErr_GivenExceptionMatches(err, exc_type2));
-}
-#endif
-
-/* CheckBinaryVersion */
-static int __Pyx_check_binary_version(void) {
-    char ctversion[4], rtversion[4];
-    PyOS_snprintf(ctversion, 4, "%d.%d", PY_MAJOR_VERSION, PY_MINOR_VERSION);
-    PyOS_snprintf(rtversion, 4, "%s", Py_GetVersion());
-    if (ctversion[0] != rtversion[0] || ctversion[2] != rtversion[2]) {
-        char message[200];
-        PyOS_snprintf(message, sizeof(message),
-                      "compiletime version %s of module '%.100s' "
-                      "does not match runtime version %s",
-                      ctversion, __Pyx_MODULE_NAME, rtversion);
-        return PyErr_WarnEx(NULL, message, 1);
-    }
-    return 0;
-}
-
-/* ModuleImport */
-#ifndef __PYX_HAVE_RT_ImportModule
-#define __PYX_HAVE_RT_ImportModule
-static PyObject *__Pyx_ImportModule(const char *name) {
-    PyObject *py_name = 0;
-    PyObject *py_module = 0;
-    py_name = __Pyx_PyIdentifier_FromString(name);
-    if (!py_name)
-        goto bad;
-    py_module = PyImport_Import(py_name);
-    Py_DECREF(py_name);
-    return py_module;
-bad:
-    Py_XDECREF(py_name);
-    return 0;
-}
-#endif
-
-/* TypeImport */
-#ifndef __PYX_HAVE_RT_ImportType
-#define __PYX_HAVE_RT_ImportType
-static PyTypeObject *__Pyx_ImportType(const char *module_name, const char *class_name,
-    size_t size, int strict)
-{
-    PyObject *py_module = 0;
-    PyObject *result = 0;
-    PyObject *py_name = 0;
-    char warning[200];
-    Py_ssize_t basicsize;
-#ifdef Py_LIMITED_API
-    PyObject *py_basicsize;
-#endif
-    py_module = __Pyx_ImportModule(module_name);
-    if (!py_module)
-        goto bad;
-    py_name = __Pyx_PyIdentifier_FromString(class_name);
-    if (!py_name)
-        goto bad;
-    result = PyObject_GetAttr(py_module, py_name);
-    Py_DECREF(py_name);
-    py_name = 0;
-    Py_DECREF(py_module);
-    py_module = 0;
-    if (!result)
-        goto bad;
-    if (!PyType_Check(result)) {
-        PyErr_Format(PyExc_TypeError,
-            "%.200s.%.200s is not a type object",
-            module_name, class_name);
-        goto bad;
-    }
-#ifndef Py_LIMITED_API
-    basicsize = ((PyTypeObject *)result)->tp_basicsize;
-#else
-    py_basicsize = PyObject_GetAttrString(result, "__basicsize__");
-    if (!py_basicsize)
-        goto bad;
-    basicsize = PyLong_AsSsize_t(py_basicsize);
-    Py_DECREF(py_basicsize);
-    py_basicsize = 0;
-    if (basicsize == (Py_ssize_t)-1 && PyErr_Occurred())
-        goto bad;
-#endif
-    if (!strict && (size_t)basicsize > size) {
-        PyOS_snprintf(warning, sizeof(warning),
-            "%s.%s size changed, may indicate binary incompatibility. Expected %zd, got %zd",
-            module_name, class_name, basicsize, size);
-        if (PyErr_WarnEx(NULL, warning, 0) < 0) goto bad;
-    }
-    else if ((size_t)basicsize != size) {
-        PyErr_Format(PyExc_ValueError,
-            "%.200s.%.200s has the wrong size, try recompiling. Expected %zd, got %zd",
-            module_name, class_name, basicsize, size);
-        goto bad;
-    }
-    return (PyTypeObject *)result;
-bad:
-    Py_XDECREF(py_module);
-    Py_XDECREF(result);
-    return NULL;
-}
-#endif
-
-/* InitStrings */
-static int __Pyx_InitStrings(__Pyx_StringTabEntry *t) {
-    while (t->p) {
-        #if PY_MAJOR_VERSION < 3
-        if (t->is_unicode) {
-            *t->p = PyUnicode_DecodeUTF8(t->s, t->n - 1, NULL);
-        } else if (t->intern) {
-            *t->p = PyString_InternFromString(t->s);
-        } else {
-            *t->p = PyString_FromStringAndSize(t->s, t->n - 1);
-        }
-        #else
-        if (t->is_unicode | t->is_str) {
-            if (t->intern) {
-                *t->p = PyUnicode_InternFromString(t->s);
-            } else if (t->encoding) {
-                *t->p = PyUnicode_Decode(t->s, t->n - 1, t->encoding, NULL);
-            } else {
-                *t->p = PyUnicode_FromStringAndSize(t->s, t->n - 1);
-            }
-        } else {
-            *t->p = PyBytes_FromStringAndSize(t->s, t->n - 1);
-        }
-        #endif
-        if (!*t->p)
-            return -1;
-        if (PyObject_Hash(*t->p) == -1)
-            return -1;
-        ++t;
-    }
-    return 0;
-}
-
-static CYTHON_INLINE PyObject* __Pyx_PyUnicode_FromString(const char* c_str) {
-    return __Pyx_PyUnicode_FromStringAndSize(c_str, (Py_ssize_t)strlen(c_str));
-}
-static CYTHON_INLINE const char* __Pyx_PyObject_AsString(PyObject* o) {
-    Py_ssize_t ignore;
-    return __Pyx_PyObject_AsStringAndSize(o, &ignore);
-}
-#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII || __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT
-#if !CYTHON_PEP393_ENABLED
-static const char* __Pyx_PyUnicode_AsStringAndSize(PyObject* o, Py_ssize_t *length) {
-    char* defenc_c;
-    PyObject* defenc = _PyUnicode_AsDefaultEncodedString(o, NULL);
-    if (!defenc) return NULL;
-    defenc_c = PyBytes_AS_STRING(defenc);
-#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII
-    {
-        char* end = defenc_c + PyBytes_GET_SIZE(defenc);
-        char* c;
-        for (c = defenc_c; c < end; c++) {
-            if ((unsigned char) (*c) >= 128) {
-                PyUnicode_AsASCIIString(o);
-                return NULL;
-            }
-        }
-    }
-#endif
-    *length = PyBytes_GET_SIZE(defenc);
-    return defenc_c;
-}
-#else
-static CYTHON_INLINE const char* __Pyx_PyUnicode_AsStringAndSize(PyObject* o, Py_ssize_t *length) {
-    if (unlikely(__Pyx_PyUnicode_READY(o) == -1)) return NULL;
-#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII
-    if (likely(PyUnicode_IS_ASCII(o))) {
-        *length = PyUnicode_GET_LENGTH(o);
-        return PyUnicode_AsUTF8(o);
-    } else {
-        PyUnicode_AsASCIIString(o);
-        return NULL;
-    }
-#else
-    return PyUnicode_AsUTF8AndSize(o, length);
-#endif
-}
-#endif
-#endif
-static CYTHON_INLINE const char* __Pyx_PyObject_AsStringAndSize(PyObject* o, Py_ssize_t *length) {
-#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII || __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT
-    if (
-#if PY_MAJOR_VERSION < 3 && __PYX_DEFAULT_STRING_ENCODING_IS_ASCII
-            __Pyx_sys_getdefaultencoding_not_ascii &&
-#endif
-            PyUnicode_Check(o)) {
-        return __Pyx_PyUnicode_AsStringAndSize(o, length);
-    } else
-#endif
-#if (!CYTHON_COMPILING_IN_PYPY) || (defined(PyByteArray_AS_STRING) && defined(PyByteArray_GET_SIZE))
-    if (PyByteArray_Check(o)) {
-        *length = PyByteArray_GET_SIZE(o);
-        return PyByteArray_AS_STRING(o);
-    } else
-#endif
-    {
-        char* result;
-        int r = PyBytes_AsStringAndSize(o, &result, length);
-        if (unlikely(r < 0)) {
-            return NULL;
-        } else {
-            return result;
-        }
-    }
-}
-static CYTHON_INLINE int __Pyx_PyObject_IsTrue(PyObject* x) {
-   int is_true = x == Py_True;
-   if (is_true | (x == Py_False) | (x == Py_None)) return is_true;
-   else return PyObject_IsTrue(x);
-}
-static PyObject* __Pyx_PyNumber_IntOrLongWrongResultType(PyObject* result, const char* type_name) {
-#if PY_MAJOR_VERSION >= 3
-    if (PyLong_Check(result)) {
-        if (PyErr_WarnFormat(PyExc_DeprecationWarning, 1,
-                "__int__ returned non-int (type %.200s).  "
-                "The ability to return an instance of a strict subclass of int "
-                "is deprecated, and may be removed in a future version of Python.",
-                Py_TYPE(result)->tp_name)) {
-            Py_DECREF(result);
-            return NULL;
-        }
-        return result;
-    }
-#endif
-    PyErr_Format(PyExc_TypeError,
-                 "__%.4s__ returned non-%.4s (type %.200s)",
-                 type_name, type_name, Py_TYPE(result)->tp_name);
-    Py_DECREF(result);
-    return NULL;
-}
-static CYTHON_INLINE PyObject* __Pyx_PyNumber_IntOrLong(PyObject* x) {
-#if CYTHON_USE_TYPE_SLOTS
-  PyNumberMethods *m;
-#endif
-  const char *name = NULL;
-  PyObject *res = NULL;
-#if PY_MAJOR_VERSION < 3
-  if (likely(PyInt_Check(x) || PyLong_Check(x)))
-#else
-  if (likely(PyLong_Check(x)))
-#endif
-    return __Pyx_NewRef(x);
-#if CYTHON_USE_TYPE_SLOTS
-  m = Py_TYPE(x)->tp_as_number;
-  #if PY_MAJOR_VERSION < 3
-  if (m && m->nb_int) {
-    name = "int";
-    res = m->nb_int(x);
-  }
-  else if (m && m->nb_long) {
-    name = "long";
-    res = m->nb_long(x);
-  }
-  #else
-  if (likely(m && m->nb_int)) {
-    name = "int";
-    res = m->nb_int(x);
-  }
-  #endif
-#else
-  if (!PyBytes_CheckExact(x) && !PyUnicode_CheckExact(x)) {
-    res = PyNumber_Int(x);
-  }
-#endif
-  if (likely(res)) {
-#if PY_MAJOR_VERSION < 3
-    if (unlikely(!PyInt_Check(res) && !PyLong_Check(res))) {
-#else
-    if (unlikely(!PyLong_CheckExact(res))) {
-#endif
-        return __Pyx_PyNumber_IntOrLongWrongResultType(res, name);
-    }
-  }
-  else if (!PyErr_Occurred()) {
-    PyErr_SetString(PyExc_TypeError,
-                    "an integer is required");
-  }
-  return res;
-}
-static CYTHON_INLINE Py_ssize_t __Pyx_PyIndex_AsSsize_t(PyObject* b) {
-  Py_ssize_t ival;
-  PyObject *x;
-#if PY_MAJOR_VERSION < 3
-  if (likely(PyInt_CheckExact(b))) {
-    if (sizeof(Py_ssize_t) >= sizeof(long))
-        return PyInt_AS_LONG(b);
-    else
-        return PyInt_AsSsize_t(x);
-  }
-#endif
-  if (likely(PyLong_CheckExact(b))) {
-    #if CYTHON_USE_PYLONG_INTERNALS
-    const digit* digits = ((PyLongObject*)b)->ob_digit;
-    const Py_ssize_t size = Py_SIZE(b);
-    if (likely(__Pyx_sst_abs(size) <= 1)) {
-        ival = likely(size) ? digits[0] : 0;
-        if (size == -1) ival = -ival;
-        return ival;
-    } else {
-      switch (size) {
-         case 2:
-           if (8 * sizeof(Py_ssize_t) > 2 * PyLong_SHIFT) {
-             return (Py_ssize_t) (((((size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-         case -2:
-           if (8 * sizeof(Py_ssize_t) > 2 * PyLong_SHIFT) {
-             return -(Py_ssize_t) (((((size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-         case 3:
-           if (8 * sizeof(Py_ssize_t) > 3 * PyLong_SHIFT) {
-             return (Py_ssize_t) (((((((size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-         case -3:
-           if (8 * sizeof(Py_ssize_t) > 3 * PyLong_SHIFT) {
-             return -(Py_ssize_t) (((((((size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-         case 4:
-           if (8 * sizeof(Py_ssize_t) > 4 * PyLong_SHIFT) {
-             return (Py_ssize_t) (((((((((size_t)digits[3]) << PyLong_SHIFT) | (size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-         case -4:
-           if (8 * sizeof(Py_ssize_t) > 4 * PyLong_SHIFT) {
-             return -(Py_ssize_t) (((((((((size_t)digits[3]) << PyLong_SHIFT) | (size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-      }
-    }
-    #endif
-    return PyLong_AsSsize_t(b);
-  }
-  x = PyNumber_Index(b);
-  if (!x) return -1;
-  ival = PyInt_AsSsize_t(x);
-  Py_DECREF(x);
-  return ival;
-}
-static CYTHON_INLINE PyObject * __Pyx_PyBool_FromLong(long b) {
-  return b ? __Pyx_NewRef(Py_True) : __Pyx_NewRef(Py_False);
-}
-static CYTHON_INLINE PyObject * __Pyx_PyInt_FromSize_t(size_t ival) {
-    return PyInt_FromSize_t(ival);
-}
-
-
-#endif /* Py_PYTHON_H */

lakesuperior/cy_include/cytpl.pxd

@@ -9,43 +9,42 @@ cdef extern from 'tpl.h':
     ctypedef void tpl_free_fcn(void *ptr)
     ctypedef void tpl_fatal_fcn(const char *fmt, ...)
 
-    cdef:
-        int TPL_FILE
-        int TPL_MEM
-        int TPL_PREALLOCD
-        int TPL_EXCESS_OK
-        int TPL_FD
-        int TPL_UFREE
-        int TPL_DATAPEEK
-        int TPL_FXLENS
-        int TPL_GETSIZE
+    int TPL_FILE
+    int TPL_MEM
+    int TPL_PREALLOCD
+    int TPL_EXCESS_OK
+    int TPL_FD
+    int TPL_UFREE
+    int TPL_DATAPEEK
+    int TPL_FXLENS
+    int TPL_GETSIZE
 
-        struct tpl_hook_t:
-            tpl_print_fcn *oops
-            tpl_malloc_fcn *malloc
-            tpl_realloc_fcn *realloc
-            tpl_free_fcn *free
-            tpl_fatal_fcn *fatal
-            size_t gather_max
+    struct tpl_hook_t:
+        tpl_print_fcn *oops
+        tpl_malloc_fcn *malloc
+        tpl_realloc_fcn *realloc
+        tpl_free_fcn *free
+        tpl_fatal_fcn *fatal
+        size_t gather_max
 
-        struct tpl_node:
-            int type
-            void *addr
-            void *data
-            int num
-            size_t ser_osz
-            tpl_node *children
-            tpl_node *next
-            tpl_node *prev
-            tpl_node *parent
+    struct tpl_node:
+        int type
+        void *addr
+        void *data
+        int num
+        size_t ser_osz
+        tpl_node *children
+        tpl_node *next
+        tpl_node *prev
+        tpl_node *parent
 
-        struct tpl_bin:
-            void *addr
-            uint32_t sz
+    struct tpl_bin:
+        void *addr
+        uint32_t sz
 
-        struct tpl_gather_t:
-            char *img
-            int len
+    struct tpl_gather_t:
+        char *img
+        int len
 
     ctypedef int tpl_gather_cb(void *img, size_t sz, void *data)
 

lakesuperior/cy_include/spookyhash.pxd

@@ -0,0 +1,20 @@
+from libc.stdint cimport uint32_t, uint64_t
+
+cdef extern from 'spookyhash_api.h':
+
+    ctypedef struct spookyhash_context:
+        pass
+
+    void spookyhash_context_init(
+            spookyhash_context *context, uint64_t seed_1, uint64_t seed_2)
+    void spookyhash_update(
+            spookyhash_context *context, const void *input, size_t input_size)
+    void spookyhash_final(
+            spookyhash_context *context, uint64_t *hash_1, uint64_t *hash_2)
+
+    uint32_t spookyhash_32(const void *input, size_t input_size, uint32_t seed)
+    uint64_t spookyhash_64(const void *input, size_t input_size, uint64_t seed)
+    void spookyhash_128(
+            const void *input, size_t input_size, uint64_t *hash_1,
+            uint64_t *hash_2)
+

lakesuperior/dictionaries/namespaces.py

@@ -29,9 +29,8 @@ core_namespaces = {
     'xsd' : rdflib.namespace.XSD,
 }
 
-ns_collection = core_namespaces.copy()
-custom_ns = {pfx: Namespace(ns) for pfx, ns in config['namespaces'].items()}
-ns_collection.update(custom_ns)
+ns_collection  = {pfx: Namespace(ns) for pfx, ns in config['namespaces'].items()}
+ns_collection.update(core_namespaces)
 
 ns_mgr = NamespaceManager(Graph())
 

lakesuperior/endpoints/admin.py

@@ -3,6 +3,8 @@ import logging
 from flask import Blueprint, render_template
 
 from lakesuperior.api import admin as admin_api
+from lakesuperior.exceptions import (
+    ChecksumValidationError, ResourceNotExistsError, TombstoneError)
 
 
 # Admin interface and REST API.
@@ -24,15 +26,16 @@ def stats():
         https://stackoverflow.com/a/1094933/3758232
 
         :param int num: Size value in bytes.
-        :param string suffix: Suffix label (defaults to `B`).
+        :param str suffix: Suffix label (defaults to ``b``).
 
-        @return string Formatted size to largest fitting unit.
+        :rtype: str
+        :return: Formatted size to largest fitting unit.
         """
         for unit in ['','K','M','G','T','P','E','Z']:
             if abs(num) < 1024.0:
-                return "{:3.1f} {}{}".format(num, unit, suffix)
+                return f'{num:3.1f} {unit}{suffix}'
             num /= 1024.0
-        return "{:.1f} {}{}".format(num, 'Y', suffix)
+        return f'{num:.1f} Y{suffix}'
 
     repo_stats = admin_api.stats()
 
@@ -48,3 +51,21 @@ def admin_tools():
     @TODO stub.
     """
     return render_template('admin_tools.html')
+
+
+@admin.route('/<path:uid>/fixity', methods=['GET'])
+def fixity_check(uid):
+    """
+    Check the fixity of a resource.
+    """
+    uid = '/' + uid.strip('/')
+    try:
+        admin_api.fixity_check(uid)
+    except ResourceNotExistsError as e:
+        return str(e), 404
+    except TombstoneError as e:
+        return str(e), 410
+    except ChecksumValidationError as e:
+        return str(e), 412
+
+    return f'Checksum for {uid} passed.', 200

lakesuperior/endpoints/ldp.py

@@ -1,3 +1,4 @@
+import hashlib
 import logging
 import pdb
 
@@ -13,19 +14,21 @@ from flask import (
         Blueprint, Response, g, make_response, render_template,
         request, send_file)
 from rdflib import Graph, plugin, parser#, serializer
+from werkzeug.http import parse_date
 
 from lakesuperior import env
 from lakesuperior.api import resource as rsrc_api
 from lakesuperior.dictionaries.namespaces import ns_collection as nsc
 from lakesuperior.dictionaries.namespaces import ns_mgr as nsm
-from lakesuperior.exceptions import (ResourceNotExistsError, TombstoneError,
+from lakesuperior.exceptions import (
+        ChecksumValidationError, ResourceNotExistsError, TombstoneError,
         ServerManagedTermError, InvalidResourceError, SingleSubjectError,
         ResourceExistsError, IncompatibleLdpTypeError)
 from lakesuperior.globals import RES_CREATED
-from lakesuperior.model.ldp_factory import LdpFactory
-from lakesuperior.model.ldp_nr import LdpNr
-from lakesuperior.model.ldp_rs import LdpRs
-from lakesuperior.model.ldpr import Ldpr
+from lakesuperior.model.ldp.ldp_factory import LdpFactory
+from lakesuperior.model.ldp.ldp_nr import LdpNr
+from lakesuperior.model.ldp.ldp_rs import LdpRs
+from lakesuperior.model.ldp.ldpr import Ldpr
 from lakesuperior.toolbox import Toolbox
 
 
@@ -41,6 +44,8 @@ rdf_parsable_mimetypes = {
 }
 """MIMEtypes that can be parsed into RDF."""
 
+store = env.app_globals.rdf_store
+
 rdf_serializable_mimetypes = {
     #mt.name for mt in plugin.plugins()
     #if mt.kind is serializer.Serializer and '/' in mt.name
@@ -138,22 +143,32 @@ def get_resource(uid, out_fmt=None):
         ``\*/fcr:metadata`` and ``\*/fcr:content`` endpoints. The default is
         False.
     """
-    logger.info('UID: {}'.format(uid))
-    out_headers = std_headers
+    out_headers = std_headers.copy()
     repr_options = defaultdict(dict)
+
+    # Fist check if it's not a 404 or a 410.
+    try:
+        if not rsrc_api.exists(uid):
+            return '', 404
+    except TombstoneError as e:
+        return _tombstone_response(e, uid)
+
+    # Then process the condition headers.
+    cond_ret = _process_cond_headers(uid, request.headers)
+    if cond_ret:
+        return cond_ret
+
+    # Then, business as usual.
+    # Evaluate which representation is requested.
     if 'prefer' in request.headers:
         prefer = g.tbox.parse_rfc7240(request.headers['prefer'])
         logger.debug('Parsed Prefer header: {}'.format(pformat(prefer)))
         if 'return' in prefer:
             repr_options = parse_repr_options(prefer['return'])
 
-    try:
-        rsrc = rsrc_api.get(uid, repr_options)
-    except ResourceNotExistsError as e:
-        return str(e), 404
-    except TombstoneError as e:
-        return _tombstone_response(e, uid)
-    else:
+    rsrc = rsrc_api.get(uid, repr_options)
+
+    with store.txn_ctx():
         if out_fmt is None:
             rdf_mimetype = _best_rdf_mimetype()
             out_fmt = (
@@ -162,25 +177,40 @@ def get_resource(uid, out_fmt=None):
                     else 'non_rdf')
         out_headers.update(_headers_from_metadata(rsrc, out_fmt))
         uri = g.tbox.uid_to_uri(uid)
+
+# RDF output.
         if out_fmt == 'rdf':
             if locals().get('rdf_mimetype', None) is None:
                 rdf_mimetype = DEFAULT_RDF_MIMETYPE
-            ggr = g.tbox.globalize_graph(rsrc.out_graph)
+            ggr = g.tbox.globalize_imr(rsrc.out_graph)
             ggr.namespace_manager = nsm
             return _negotiate_content(
                     ggr, rdf_mimetype, out_headers, uid=uid, uri=uri)
+
+# Datastream.
         else:
             if not getattr(rsrc, 'local_path', False):
                 return ('{} has no binary content.'.format(rsrc.uid), 404)
 
             logger.debug('Streaming out binary content.')
-            rsp = make_response(send_file(
-                    rsrc.local_path, as_attachment=True,
-                    attachment_filename=rsrc.filename,
-                    mimetype=rsrc.mimetype), 200, out_headers)
-            rsp.headers.add('Link',
-                    '<{}/fcr:metadata>; rel="describedby"'.format(uri))
-            return rsp
+            if request.range and request.range.units == 'bytes':
+                # Stream partial response.
+                # This is only true if the header is well-formed. Thanks, Werkzeug.
+                rsp = _parse_range_header(
+                    request.range.ranges, rsrc, out_headers
+                )
+            else:
+                rsp = make_response(send_file(
+                        rsrc.local_path, as_attachment=True,
+                        attachment_filename=rsrc.filename,
+                        mimetype=rsrc.mimetype), 200, out_headers)
+
+        # This seems necessary to prevent Flask from setting an
+        # additional ETag.
+        if 'ETag' in out_headers:
+            rsp.set_etag(out_headers['ETag'])
+        rsp.headers.add('Link', f'<{uri}/fcr:metadata>; rel="describedby"')
+        return rsp
 
 
 @ldp.route('/<path:uid>/fcr:versions', methods=['GET'])
@@ -192,7 +222,7 @@ def get_version_info(uid):
     """
     rdf_mimetype = _best_rdf_mimetype() or DEFAULT_RDF_MIMETYPE
     try:
-        gr = rsrc_api.get_version_info(uid)
+        imr = rsrc_api.get_version_info(uid)
     except ResourceNotExistsError as e:
         return str(e), 404
     except InvalidResourceError as e:
@@ -200,7 +230,8 @@ def get_version_info(uid):
     except TombstoneError as e:
         return _tombstone_response(e, uid)
     else:
-        return _negotiate_content(g.tbox.globalize_graph(gr), rdf_mimetype)
+        with store.txn_ctx():
+            return _negotiate_content(g.tbox.globalize_imr(imr), rdf_mimetype)
 
 
 @ldp.route('/<path:uid>/fcr:versions/<ver_uid>', methods=['GET'])
@@ -213,7 +244,7 @@ def get_version(uid, ver_uid):
     """
     rdf_mimetype = _best_rdf_mimetype() or DEFAULT_RDF_MIMETYPE
     try:
-        gr = rsrc_api.get_version(uid, ver_uid)
+        imr = rsrc_api.get_version(uid, ver_uid)
     except ResourceNotExistsError as e:
         return str(e), 404
     except InvalidResourceError as e:
@@ -221,7 +252,8 @@ def get_version(uid, ver_uid):
     except TombstoneError as e:
         return _tombstone_response(e, uid)
     else:
-        return _negotiate_content(g.tbox.globalize_graph(gr), rdf_mimetype)
+        with store.txn_ctx():
+            return _negotiate_content(g.tbox.globalize_imr(imr), rdf_mimetype)
 
 
 @ldp.route('/<path:parent_uid>', methods=['POST'], strict_slashes=False)
@@ -233,44 +265,45 @@ def post_resource(parent_uid):
 
     Add a new resource in a new URI.
     """
-    rsp_headers = std_headers
+    rsp_headers = std_headers.copy()
     slug = request.headers.get('Slug')
-    logger.debug('Slug: {}'.format(slug))
 
-    handling, disposition = set_post_put_params()
+    kwargs = {}
+    kwargs['handling'], kwargs['disposition'] = set_post_put_params()
     stream, mimetype = _bistream_from_req()
 
     if mimetype in rdf_parsable_mimetypes:
         # If the content is RDF, localize in-repo URIs.
         global_rdf = stream.read()
-        rdf_data = g.tbox.localize_payload(global_rdf)
-        rdf_fmt = mimetype
-        stream = mimetype = None
+        kwargs['rdf_data'] = g.tbox.localize_payload(global_rdf)
+        kwargs['rdf_fmt'] = mimetype
     else:
-        rdf_data = rdf_fmt = None
+        kwargs['stream'] = stream
+        kwargs['mimetype'] = mimetype
+        # Check digest if requested.
+        if 'digest' in request.headers:
+            kwargs['prov_cksum_algo'], kwargs['prov_cksum'] = \
+                    request.headers['digest'].split('=')
 
     try:
-        uid = rsrc_api.create(
-            parent_uid, slug, stream=stream, mimetype=mimetype,
-            rdf_data=rdf_data, rdf_fmt=rdf_fmt, handling=handling,
-            disposition=disposition)
+        rsrc = rsrc_api.create(parent_uid, slug, **kwargs)
     except ResourceNotExistsError as e:
         return str(e), 404
-    except InvalidResourceError as e:
+    except (InvalidResourceError, ChecksumValidationError) as e:
         return str(e), 409
     except TombstoneError as e:
         return _tombstone_response(e, uid)
     except ServerManagedTermError as e:
         return str(e), 412
 
-    uri = g.tbox.uid_to_uri(uid)
-    hdr = {'Location' : uri}
-
-    if mimetype and rdf_fmt is None:
-        hdr['Link'] = '<{0}/fcr:metadata>; rel="describedby"; anchor="{0}"'\
-                .format(uri)
+    uri = g.tbox.uid_to_uri(rsrc.uid)
+    with store.txn_ctx():
+        rsp_headers.update(_headers_from_metadata(rsrc))
+    rsp_headers['Location'] = uri
 
-    rsp_headers.update(hdr)
+    if mimetype and kwargs.get('rdf_fmt') is None:
+        rsp_headers['Link'] = (f'<{uri}/fcr:metadata>; rel="describedby"; '
+                               f'anchor="{uri}"')
 
     return uri, 201, rsp_headers
 
@@ -287,26 +320,32 @@ def put_resource(uid):
     # Parse headers.
     logger.debug('Request headers: {}'.format(request.headers))
 
-    rsp_headers = {'Content-Type' : 'text/plain; charset=utf-8'}
+    cond_ret = _process_cond_headers(uid, request.headers, False)
+    if cond_ret:
+        return cond_ret
 
-    handling, disposition = set_post_put_params()
+    kwargs = {}
+    kwargs['handling'], kwargs['disposition'] = set_post_put_params()
     stream, mimetype = _bistream_from_req()
 
     if mimetype in rdf_parsable_mimetypes:
         # If the content is RDF, localize in-repo URIs.
         global_rdf = stream.read()
-        rdf_data = g.tbox.localize_payload(global_rdf)
-        rdf_fmt = mimetype
-        stream = mimetype = None
+        kwargs['rdf_data'] = g.tbox.localize_payload(global_rdf)
+        kwargs['rdf_fmt'] = mimetype
     else:
-        rdf_data = rdf_fmt = None
+        kwargs['stream'] = stream
+        kwargs['mimetype'] = mimetype
+        # Check digest if requested.
+        if 'digest' in request.headers:
+            kwargs['prov_cksum_algo'], kwargs['prov_cksum'] = \
+                    request.headers['digest'].split('=')
 
     try:
-        evt = rsrc_api.create_or_replace(
-            uid, stream=stream, mimetype=mimetype,
-            rdf_data=rdf_data, rdf_fmt=rdf_fmt, handling=handling,
-            disposition=disposition)
-    except (InvalidResourceError, ResourceExistsError) as e:
+        evt, rsrc = rsrc_api.create_or_replace(uid, **kwargs)
+    except (
+            InvalidResourceError, ChecksumValidationError,
+            ResourceExistsError) as e:
         return str(e), 409
     except (ServerManagedTermError, SingleSubjectError) as e:
         return str(e), 412
@@ -315,13 +354,16 @@ def put_resource(uid):
     except TombstoneError as e:
         return _tombstone_response(e, uid)
 
+    with store.txn_ctx():
+        rsp_headers = _headers_from_metadata(rsrc)
+    rsp_headers['Content-Type'] = 'text/plain; charset=utf-8'
+
     uri = g.tbox.uid_to_uri(uid)
     if evt == RES_CREATED:
         rsp_code = 201
         rsp_headers['Location'] = rsp_body = uri
-        if mimetype and not rdf_data:
-            rsp_headers['Link'] = (
-                    '<{0}/fcr:metadata>; rel="describedby"'.format(uri))
+        if mimetype and not kwargs.get('rdf_data'):
+            rsp_headers['Link'] = f'<{uri}/fcr:metadata>; rel="describedby"'
     else:
         rsp_code = 204
         rsp_body = ''
@@ -338,6 +380,18 @@ def patch_resource(uid, is_metadata=False):
 
     Update an existing resource with a SPARQL-UPDATE payload.
     """
+    # Fist check if it's not a 404 or a 410.
+    try:
+        if not rsrc_api.exists(uid):
+            return '', 404
+    except TombstoneError as e:
+        return _tombstone_response(e, uid)
+
+    # Then process the condition headers.
+    cond_ret = _process_cond_headers(uid, request.headers, False)
+    if cond_ret:
+        return cond_ret
+
     rsp_headers = {'Content-Type' : 'text/plain; charset=utf-8'}
     if request.mimetype != 'application/sparql-update':
         return 'Provided content type is not a valid parsable format: {}'\
@@ -347,16 +401,13 @@ def patch_resource(uid, is_metadata=False):
     local_update_str = g.tbox.localize_ext_str(update_str, nsc['fcres'][uid])
     try:
         rsrc = rsrc_api.update(uid, local_update_str, is_metadata)
-    except ResourceNotExistsError as e:
-        return str(e), 404
-    except TombstoneError as e:
-        return _tombstone_response(e, uid)
     except (ServerManagedTermError, SingleSubjectError) as e:
         return str(e), 412
     except InvalidResourceError as e:
         return str(e), 415
     else:
-        rsp_headers.update(_headers_from_metadata(rsrc))
+        with store.txn_ctx():
+            rsp_headers.update(_headers_from_metadata(rsrc))
         return '', 204, rsp_headers
 
 
@@ -379,7 +430,19 @@ def delete_resource(uid):
     must be deleted as well, or the ``Prefer:no-tombstone`` header can be used.
     The latter will forget (completely delete) the resource immediately.
     """
-    headers = std_headers
+    # Fist check if it's not a 404 or a 410.
+    try:
+        if not rsrc_api.exists(uid):
+            return '', 404
+    except TombstoneError as e:
+        return _tombstone_response(e, uid)
+
+    # Then process the condition headers.
+    cond_ret = _process_cond_headers(uid, request.headers, False)
+    if cond_ret:
+        return cond_ret
+
+    headers = std_headers.copy()
 
     if 'prefer' in request.headers:
         prefer = g.tbox.parse_rfc7240(request.headers['prefer'])
@@ -387,12 +450,7 @@ def delete_resource(uid):
     else:
         leave_tstone = True
 
-    try:
-        rsrc_api.delete(uid, leave_tstone)
-    except ResourceNotExistsError as e:
-        return str(e), 404
-    except TombstoneError as e:
-        return _tombstone_response(e, uid)
+    rsrc_api.delete(uid, leave_tstone)
 
     return '', 204, headers
 
@@ -407,7 +465,7 @@ def tombstone(uid):
     405.
     """
     try:
-        rsrc = rsrc_api.get(uid)
+        rsrc_api.get(uid)
     except TombstoneError as e:
         if request.method == 'DELETE':
             if e.uid == uid:
@@ -462,7 +520,7 @@ def patch_version(uid, ver_uid):
     :param str ver_uid: Version UID.
     """
     try:
-        rsrc_api.revert_to_version(uid, rsrc_uid)
+        rsrc_api.revert_to_version(uid, ver_uid)
     except ResourceNotExistsError as e:
         return str(e), 404
     except InvalidResourceError as e:
@@ -620,22 +678,16 @@ def _headers_from_metadata(rsrc, out_fmt='text/turtle'):
     """
     Create a dict of headers from a metadata graph.
 
-    :param lakesuperior.model.ldpr.Ldpr rsrc: Resource to extract metadata
+    :param lakesuperior.model.ldp.ldpr.Ldpr rsrc: Resource to extract metadata
         from.
     """
     rsp_headers = defaultdict(list)
 
-    digest = rsrc.metadata.value(rsrc.uri, nsc['premis'].hasMessageDigest)
+    digest_p = rsrc.metadata.value(nsc['premis'].hasMessageDigest)
     # Only add ETag and digest if output is not RDF.
-    if digest:
-        digest_components = digest.split(':')
-        cksum_hex = digest_components[-1]
-        cksum = bytearray.fromhex(cksum_hex)
-        digest_algo = digest_components[-2]
-        etag_str = cksum_hex
-        rsp_headers['ETag'] = etag_str
-        rsp_headers['Digest'] = '{}={}'.format(
-                digest_algo.upper(), b64encode(cksum).decode('ascii'))
+    if digest_p:
+        rsp_headers['ETag'], rsp_headers['Digest'] = (
+            _digest_headers(digest_p))
 
 
     last_updated_term = rsrc.metadata.value(nsc['fcrepo'].lastModified)
@@ -646,9 +698,207 @@ def _headers_from_metadata(rsrc, out_fmt='text/turtle'):
     for t in rsrc.ldp_types:
         rsp_headers['Link'].append('{};rel="type"'.format(t.n3()))
 
-    mimetype = rsrc.metadata.value(nsc['ebucore'].hasMimeType)
-    if mimetype:
-        rsp_headers['Content-Type'] = mimetype
+    if rsrc.mimetype:
+        rsp_headers['Content-Type'] = rsrc.mimetype
 
     return rsp_headers
 
+
+def _digest_headers(digest):
+    """
+    Format ETag and Digest headers from resource checksum.
+
+    :param str digest: Resource digest. For an extracted IMR, this is the
+        value of the ``premis:hasMessageDigest`` property.
+    """
+    digest_components = digest.split(':')
+    cksum_hex = digest_components[-1]
+    cksum = bytearray.fromhex(cksum_hex)
+    digest_algo = digest_components[-2]
+    etag_str = cksum_hex
+    digest_str = '{}={}'.format(
+            digest_algo.upper(), b64encode(cksum).decode('ascii'))
+
+    return etag_str, digest_str
+
+
+def _condition_hdr_match(uid, headers, safe=True):
+    """
+    Conditional header evaluation for HEAD, GET, PUT and DELETE requests.
+
+    Determine whether any conditional headers, and which, is/are imposed in the
+    request (``If-Match``, ``If-None-Match``, ``If-Modified-Since``,
+    ``If-Unmodified-Since``, or none) and what the most relevant condition
+    evaluates to (``True`` or ``False``).
+
+    `RFC 7232 <https://tools.ietf.org/html/rfc7232#section-3.1>`__  does not
+    indicate an exact condition precedence, except that the ETag
+    matching conditions void the timestamp-based ones. This function
+    adopts the following precedence:
+
+    - ``If-Match`` is evaluated first if present;
+    - Else, ``If-None-Match`` is evaluated if present;
+    - Else, ``If-Modified-Since`` and ``If-Unmodified-Since``
+      are evaluated if present. If both conditions are present they are
+      both returned so they can be furher evaluated, e.g. using a logical AND
+      to allow time-range conditions, where the two terms indicate the early
+      and late boundary, respectively.
+
+    Note that the above mentioned RFC mentions several cases in which these
+    conditions are ignored, e.g. for a 404 in some cases, or for certain
+    HTTP methods for ``If-Modified-Since``. This must be implemented by the
+    calling function.
+
+    :param str uid: UID of the resource requested.
+    :param werkzeug.datastructures.EnvironHeaders headers: Incoming request
+        headers.
+    :param bool safe: Whether a "safe" method is being processed. Defaults to
+        True.
+
+    :rtype: dict (str, bool)
+    :return: Dictionary whose keys are the conditional header names that
+        have been evaluated, and whose boolean values indicate whether each
+        condition is met. If no valid conditional header is found, an empty
+        dict is returned.
+    """
+    # ETag-based conditions.
+    # This ignores headers with empty values.
+    if headers.get('if-match') or headers.get('if-none-match'):
+        cond_hdr = 'if-match' if headers.get('if-match') else 'if-none-match'
+
+        # Wildcard matching for unsafe methods. Cannot be part of a list of
+        # ETags nor be enclosed in quotes.
+        if not safe and headers.get(cond_hdr) == '*':
+            return {cond_hdr: (cond_hdr == 'if-match') == rsrc_api.exists(uid)}
+
+        req_etags = [
+                et.strip('\'" ') for et in headers.get(cond_hdr).split(',')]
+
+        with store.txn_ctx():
+            try:
+                rsrc_meta = rsrc_api.get_metadata(uid)
+            except ResourceNotExistsError:
+                rsrc_meta = Graph(uri=nsc['fcres'][uid])
+
+            digest_prop = rsrc_meta.value(nsc['premis'].hasMessageDigest)
+
+        if digest_prop:
+            etag, _ = _digest_headers(digest_prop)
+            if cond_hdr == 'if-match':
+                is_match = etag in req_etags
+            else:
+                is_match = etag not in req_etags
+        else:
+            is_match = cond_hdr == 'if-none-match'
+
+        return {cond_hdr: is_match}
+
+    # Timestmp-based conditions.
+    ret = {}
+    if headers.get('if-modified-since') or headers.get('if-unmodified-since'):
+
+        try:
+            rsrc_meta = rsrc_api.get_metadata(uid)
+        except ResourceNotExistsError:
+            return {
+                'if-modified-since': False,
+                'if-unmodified-since': False
+            }
+
+        with store.txn_ctx():
+            lastmod_str = rsrc_meta.value(nsc['fcrepo'].lastModified)
+        lastmod_ts = arrow.get(lastmod_str)
+
+        # If date is not in a RFC 5322 format
+        # (https://tools.ietf.org/html/rfc5322#section-3.3) parse_date
+        # evaluates to None.
+        mod_since_date = parse_date(headers.get('if-modified-since'))
+        if mod_since_date:
+            cond_hdr = 'if-modified-since'
+            ret[cond_hdr] = lastmod_ts > arrow.get(mod_since_date)
+
+        unmod_since_date = parse_date(headers.get('if-unmodified-since'))
+        if unmod_since_date:
+            cond_hdr = 'if-unmodified-since'
+            ret[cond_hdr] = lastmod_ts < arrow.get(unmod_since_date)
+
+    return ret
+
+
+def _process_cond_headers(uid, headers, safe=True):
+    """
+    Process the outcome of the evaluation of conditional headers.
+
+    This yields different response between safe methods (``HEAD``, ``GET``,
+    etc.) and unsafe ones (``PUT``, ``DELETE``, etc.
+
+    :param str uid: Resource UID.
+    :param werkzeug.datastructures.EnvironHeaders headers: Incoming request
+        headers.
+    :param bool safe: Whether a "safe" method is being processed. Defaults to
+        True.
+    """
+    try:
+        cond_match = _condition_hdr_match(uid, headers, safe)
+    except TombstoneError as e:
+        return _tombstone_response(e, uid)
+
+    if cond_match:
+        if safe:
+            if 'if-match' in cond_match or 'if-none-match' in cond_match:
+                # If an expected list of tags is not matched, the response is
+                # "Precondition Failed". For all other cases, it's "Not Modified".
+                if not cond_match.get('if-match', True):
+                    return '', 412
+                if not cond_match.get('if-none-match', True):
+                    return '', 304
+            # The presence of an Etag-based condition, whether satisfied or not,
+            # voids the timestamp-based conditions.
+            elif (
+                    not cond_match.get('if-modified-since', True) or
+                    not cond_match.get('if-unmodified-since', True)):
+                return '', 304
+        else:
+            # Note that If-Modified-Since is only evaluated for safe methods.
+            if 'if-match' in cond_match or 'if-none-match' in cond_match:
+                if (
+                        not cond_match.get('if-match', True) or
+                        not cond_match.get('if-none-match', True)):
+                    return '', 412
+
+            # The presence of an Etag-based condition, whether satisfied or not,
+            # voids the timestamp-based conditions.
+            elif not cond_match.get('if-unmodified-since', True):
+                return '', 412
+
+
+def _parse_range_header(ranges, rsrc, headers):
+    """
+    Parse a ``Range`` header and return the appropriate response.
+    """
+    if len(ranges) == 1:
+        # Single range.
+        rng = ranges[0]
+        logger.debug('Streaming contiguous partial content.')
+        with open(rsrc.local_path, 'rb') as fh:
+            size = None if rng[1] is None else rng[1] - rng[0]
+            hdr_endbyte = (
+                    rsrc.content_size - 1 if rng[1] is None else rng[1] - 1)
+            fh.seek(rng[0])
+            out = fh.read(size)
+        headers['Content-Range'] = \
+                f'bytes {rng[0]}-{hdr_endbyte} / {rsrc.content_size}'
+
+    else:
+        return make_response('Multiple ranges are not yet supported.', 501)
+
+        # TODO Format the response as multipart/byteranges:
+        # https://tools.ietf.org/html/rfc7233#section-4.1
+        #out = []
+        #with open(rsrc.local_path, 'rb') as fh:
+        #    for rng in rng_header.ranges:
+        #        fh.seek(rng[0])
+        #        size = None if rng[1] is None else rng[1] - rng[0]
+        #        out.extend(fh.read(size))
+
+    return make_response(out, 206, headers)

lakesuperior/etc.defaults/application.yml

@@ -23,9 +23,16 @@ data_dir:
 # checksumn of the contents of the file.
 uuid:
     # Algorithm used to calculate the hash that generates the content path.
-    # One of: sha1, sha224, sha256, sha384, or sha512, corresponding to the
-    # omonymous hashlib function:
+    # This can be any one of the Python hashlib functions:
     # https://docs.python.org/3/library/hashlib.html
+    #
+    # This needs to be ``sha1`` if a compatibility with the Fedora4 file layout
+    # is needed, however in security-sensitive environments it is strongly
+    # advised to use a stronger algorithm, since SHA1 is known to be
+    # vulnerable to counterfeiting: see https://shattered.io/
+    #
+    # `blake2b` is a strong, fast cryptographic alternative to SHA2/3:
+    # https://blake2.net/
     algo: sha1
 
 # Data store configuration.

lakesuperior/etc.defaults/gunicorn.yml

@@ -10,11 +10,11 @@ data_dir: .
 #listen_addr: '0.0.0.0'
 #listen_port: 8000
 #workers: 4
-#worker_class: 'gevent'
+#worker_class: 'sync'
 #max_requests: 0
 
 #user: ''
 #group: ''
 
-#preload_app: True
+#preload_app: False
 

lakesuperior/exceptions.py

@@ -24,6 +24,27 @@ class ResourceExistsError(ResourceError):
 
 
 
+class ChecksumValidationError(ResourceError):
+    '''
+    Raised in an attempt to create a resource a URI that already exists and is
+    not supposed to.
+
+    This usually surfaces at the HTTP level as a 409.
+    '''
+    def __init__(self, uid, prov_cksum, calc_cksum, msg=None):
+        self.uid = uid
+        self.prov_cksum = prov_cksum
+        self.calc_cksum = calc_cksum
+        self.msg = msg.format(uid) if msg else None
+
+
+    def __str__(self):
+        return self.msg or (f'Validation failed for resource {self.uid}. '
+                            f'Provided checksum: {self.prov_cksum}; '
+                            f'calculated checksum: {self.calc_cksum}')
+
+
+
 class ResourceNotExistsError(ResourceError):
     '''
     Raised in an attempt to create a resource a URN that does not exist and is

lakesuperior/lsup_admin.py

@@ -12,6 +12,7 @@ import arrow
 from lakesuperior import env
 from lakesuperior.api import admin as admin_api
 from lakesuperior.config_parser import config
+from lakesuperior.exceptions import ChecksumValidationError
 from lakesuperior.globals import AppGlobals
 
 __doc__="""
@@ -90,11 +91,20 @@ def stats(human=False):
 
 
 @click.command()
+@click.argument('uid')
 def check_fixity(uid):
     """
-    [STUB] Check fixity of a resource.
+    Check the fixity of a resource.
     """
-    pass
+    import lakesuperior.env_setup
+
+    try:
+        admin_api.fixity_check(uid)
+    except ChecksumValidationError:
+        print(f'Checksum for {uid} failed.')
+        sys.exit(1)
+
+    print(f'Checksum for {uid} passed.')
 
 
 @click.option(
@@ -162,6 +172,10 @@ def cleanup():
 @click.command()
 @click.argument('src')
 @click.argument('dest')
+@click.option(
+    '--auth', '-a',
+    help='Colon-separated credentials for HTTP Basic authentication on the '
+    'source repository. E.g. `user:password`.')
 @click.option(
     '--start', '-s', show_default=True,
     help='Starting point for looking for resources in the repository.\n'
@@ -183,11 +197,11 @@ def cleanup():
     'quitting. Other exceptions caused by the application will terminate the '
     'process as usual.')
 @click_log.simple_verbosity_option(logger)
-def migrate(src, dest, start, list_file, zero_binaries, skip_errors):
+def migrate(src, dest, auth, start, list_file, zero_binaries, skip_errors):
     """
     Migrate an LDP repository to Lakesuperior.
 
-    This utility creates a fully functional LAKEshore repository from an
+    This utility creates a fully functional Lakesuperior repository from an
     existing repository. The source repo can be Lakesuperior or
     another LDP-compatible implementation.
 
@@ -199,17 +213,21 @@ def migrate(src, dest, start, list_file, zero_binaries, skip_errors):
     """
     logger.info('Migrating {} into a new repository on {}.'.format(
             src, dest))
+    src_auth = tuple(auth.split(':')) if auth else None
     entries = admin_api.migrate(
-            src, dest, start_pts=start, list_file=list_file,
+        src, dest, src_auth=src_auth, start_pts=start, list_file=list_file,
             zero_binaries=zero_binaries, skip_errors=skip_errors)
     logger.info('Migrated {} resources.'.format(entries))
-    logger.info("""Migration complete. To start the new repository, from the
-    directory you launched this script run:
+    logger.info(f'''
+    Migration complete. A new Lakesuperior environment has been created in
+    {dest}. To start the new repository, run:
+
+    FCREPO_CONFIG_DIR="{dest}/etc" fcrepo
 
-    FCREPO_CONFIG_DIR="{}/etc" ./fcrepo
+    from the directory you launched this script in.
 
     Make sure that the default port is not being used by another repository.
-    """.format(dest))
+    ''')
 
 
 admin.add_command(bootstrap)

lakesuperior/migrator.py

@@ -68,8 +68,8 @@ class Migrator:
 
 
     def __init__(
-            self, src, dest, clear=False, zero_binaries=False,
-            compact_uris=False, skip_errors=False):
+            self, src, dest, src_auth=(None, None), clear=False,
+            zero_binaries=False, compact_uris=False, skip_errors=False):
         """
         Set up base paths and clean up existing directories.
 
@@ -81,6 +81,8 @@ class Migrator:
             it must be a writable directory. It will be deleted and recreated.
             If it does not exist, it will be created along with its parents if
             missing.
+        :param tuple src_auth: if the source repo needs HTTP authentication,
+            specify here username and password as a 2-tuple of strings.
         :param bool clear: Whether to clear any pre-existing data at the
             locations indicated.
         :param bool zero_binaries: Whether to create zero-byte binary files
@@ -99,6 +101,7 @@ class Migrator:
         self.dbpath = '{}/data/ldprs_store'.format(dest)
         self.fpath = '{}/data/ldpnr_store'.format(dest)
         self.config_dir = '{}/etc'.format(dest)
+        self.auth = src_auth
 
         if clear:
             shutil.rmtree(dest, ignore_errors=True)
@@ -196,22 +199,23 @@ class Migrator:
         iuri = ibase + uid
 
         try:
-            rsp = requests.head(uri)
-        except:
-            logger.warn('Error retrieving resource {}'.format(uri))
-            return
-        if rsp:
-            if not self.skip_errors:
-                rsp.raise_for_status()
-            elif rsp.status_code > 399:
-                print('Error retrieving resource {} headers: {} {}'.format(
-                    uri, rsp.status_code, rsp.text))
+            rsp = requests.head(uri, auth=self.auth)
+            rsp.raise_for_status()
+        except Exception as e:
+            if self.skip_errors:
+                logger.error(f'Error retrieving resource header: {e}')
+                return
+            else:
+                raise
 
         # Determine LDP type.
         ldp_type = 'ldp_nr'
         try:
-            for link in requests.utils.parse_header_links(
-                    rsp.headers.get('link')):
+            links_rsp = rsp.headers.get('link')
+            head_links = (
+                requests.utils.parse_header_links(links_rsp)
+                if links_rsp else None)
+            for link in head_links:
                 if (
                         link.get('rel') == 'type'
                         and (
@@ -228,25 +232,23 @@ class Migrator:
         # Get the whole RDF document now because we have to know all outbound
         # links.
         get_uri = (
-                uri if ldp_type == 'ldp_rs' else '{}/fcr:metadata'.format(uri))
+                uri if ldp_type == 'ldp_rs' else f'{uri}/fcr:metadata')
         try:
-            get_rsp = requests.get(get_uri)
-        except:
-            logger.warn('Error retrieving resource {}'.format(get_uri))
-            return
-        if get_rsp:
-            if not self.skip_errors:
-                get_rsp.raise_for_status()
-            elif get_rsp.status_code > 399:
-                print('Error retrieving resource {} body: {} {}'.format(
-                    uri, get_rsp.status_code, get_rsp.text))
+            get_rsp = requests.get(get_uri, auth=self.auth)
+            get_rsp.raise_for_status()
+        except Exception as e:
+            if self.skip_errors:
+                logger.error(f'Error retrieving resource body: {e}')
+                return
+            else:
+                raise
 
         data = get_rsp.content.replace(
                 self.src.encode('utf-8'), ibase.encode('utf-8'))
         gr = Graph(identifier=iuri).parse(data=data, format='turtle')
 
         # Store raw graph data. No checks.
-        with self.rdfly.store.txn_mgr(True):
+        with self.rdfly.store.txn_ctx(True):
             self.rdfly.modify_rsrc(uid, add_trp=set(gr))
 
         # Grab binary and set new resource parameters.
@@ -255,18 +257,21 @@ class Migrator:
             if self.zero_binaries:
                 data = b''
             else:
-                bin_rsp = requests.get(uri)
-                if not self.skip_errors:
+                try:
+                    bin_rsp = requests.get(uri, auth=self.auth)
                     bin_rsp.raise_for_status()
-                elif bin_rsp.status_code > 399:
-                    print('Error retrieving resource {} body: {} {}'.format(
-                        uri, bin_rsp.status_code, bin_rsp.text))
+                except Exception as e:
+                    if self.skip_errors:
+                        logger.error(f'Error retrieving binary contents: {e}')
+                        return
+                    else:
+                        raise
                 data = bin_rsp.content
             #import pdb; pdb.set_trace()
             uuid = str(gr.value(
                 URIRef(iuri), nsc['premis'].hasMessageDigest)).split(':')[-1]
             fpath = self.nonrdfly.local_path(
-                    self.nonrdfly.config['path'], uuid)
+                    self.nonrdfly.config['location'], uuid)
             makedirs(path.dirname(fpath), exist_ok=True)
             with open(fpath, 'wb') as fh:
                 fh.write(data)
@@ -280,7 +285,7 @@ class Migrator:
         for pred, obj in gr.predicate_objects():
             #import pdb; pdb.set_trace()
             obj_uid = obj.replace(ibase, '')
-            with self.rdfly.store.txn_mgr(True):
+            with self.rdfly.store.txn_ctx(True):
                 conditions = bool(
                     isinstance(obj, URIRef)
                     and obj.startswith(iuri)

lakesuperior/model/base.pxd

@@ -0,0 +1,29 @@
+cimport lakesuperior.cy_include.cytpl as tpl
+
+ctypedef tpl.tpl_bin Buffer
+
+# NOTE This may change in the future, e.g. if a different key size is to
+# be forced.
+ctypedef size_t Key
+
+ctypedef Key DoubleKey[2]
+ctypedef Key TripleKey[3]
+ctypedef Key QuadKey[4]
+
+cdef enum:
+    KLEN = sizeof(Key)
+    DBL_KLEN = 2 * sizeof(Key)
+    TRP_KLEN = 3 * sizeof(Key)
+    QUAD_KLEN = 4 * sizeof(Key)
+
+    # "NULL" key, a value that is never user-provided. Used to mark special
+    # values (e.g. deleted records).
+    NULL_KEY = 0
+    # Value of first key inserted in an empty term database.
+    FIRST_KEY = 1
+
+cdef bytes buffer_dump(Buffer* buf)
+
+# "NULL" triple, a value that is never user-provided. Used to mark special
+# values (e.g. deleted records).
+cdef TripleKey NULL_TRP = [NULL_KEY, NULL_KEY, NULL_KEY]

lakesuperior/model/base.pyx

@@ -0,0 +1,11 @@
+cdef bytes buffer_dump(const Buffer* buf):
+    """
+    Return a buffer's content as a string.
+
+    :param const Buffer* buf Pointer to a buffer to be read.
+
+    :rtype: str
+    """
+    cdef unsigned char* buf_stream = (<unsigned char*>buf.addr)
+    return buf_stream[:buf.sz]
+

lakesuperior/model/callbacks.pxd

@@ -0,0 +1,30 @@
+from lakesuperior.model.base cimport Key, TripleKey
+
+cdef:
+    bint lookup_sk_cmp_fn(
+        const TripleKey* spok, const Key k1, const Key k2
+    )
+
+    bint lookup_pk_cmp_fn(
+        const TripleKey* spok, const Key k1, const Key k2
+    )
+
+    bint lookup_ok_cmp_fn(
+        const TripleKey* spok, const Key k1, const Key k2
+    )
+
+    bint lookup_skpk_cmp_fn(
+        const TripleKey* spok, const Key k1, const Key k2
+    )
+
+    bint lookup_skok_cmp_fn(
+        const TripleKey* spok, const Key k1, const Key k2
+    )
+
+    bint lookup_pkok_cmp_fn(
+        const TripleKey* spok, const Key k1, const Key k2
+    )
+
+    bint lookup_none_cmp_fn(
+        const TripleKey* spok, const Key k1, const Key k2
+    )

lakesuperior/model/callbacks.pyx

@@ -0,0 +1,54 @@
+from lakesuperior.model.base cimport Key, TripleKey
+
+cdef inline bint lookup_sk_cmp_fn(
+    const TripleKey* spok, const Key k1, const Key k2
+):
+    """ Keyset lookup for S key. """
+    return spok[0][0] == k1
+
+
+cdef inline bint lookup_pk_cmp_fn(
+    const TripleKey* spok, const Key k1, const Key k2
+):
+    """ Keyset lookup for P key. """
+    return spok[0][1] == k1
+
+
+cdef inline bint lookup_ok_cmp_fn(
+    const TripleKey* spok, const Key k1, const Key k2
+):
+    """ Keyset lookup for O key. """
+    return spok[0][2] == k1
+
+
+cdef inline bint lookup_skpk_cmp_fn(
+    const TripleKey* spok, const Key k1, const Key k2
+):
+    """ Keyset lookup for S and P keys. """
+    return spok[0][0] == k1 and spok[0][1] == k2
+
+
+cdef inline bint lookup_skok_cmp_fn(
+    const TripleKey* spok, const Key k1, const Key k2
+):
+    """ Keyset lookup for S and O keys. """
+    return spok[0][0] == k1 and spok[0][2] == k2
+
+
+cdef inline bint lookup_pkok_cmp_fn(
+    const TripleKey* spok, const Key k1, const Key k2
+):
+    """ Keyset lookup for P and O keys. """
+    return spok[0][1] == k1 and spok[0][2] == k2
+
+
+cdef inline bint lookup_none_cmp_fn(
+    const TripleKey* spok, const Key k1, const Key k2
+):
+    """
+    Dummy callback for queries with all parameters unbound.
+
+    This function always returns ``True`` 
+    """
+    return True
+

lakesuperior/model/ldp_factory.py → lakesuperior/model/ldp/ldp_factory.py

@@ -3,20 +3,19 @@ import logging
 from pprint import pformat
 from uuid import uuid4
 
-from rdflib import Graph, parser
 from rdflib.resource import Resource
 from rdflib.namespace import RDF
 
 from lakesuperior import env
-from lakesuperior.model.ldpr import Ldpr
-from lakesuperior.model.ldp_nr import LdpNr
-from lakesuperior.model.ldp_rs import LdpRs, Ldpc, LdpDc, LdpIc
+from lakesuperior.model.ldp.ldpr import Ldpr
+from lakesuperior.model.ldp.ldp_nr import LdpNr
+from lakesuperior.model.ldp.ldp_rs import LdpRs, Ldpc, LdpDc, LdpIc
 from lakesuperior.config_parser import config
 from lakesuperior.dictionaries.namespaces import ns_collection as nsc
 from lakesuperior.exceptions import (
         IncompatibleLdpTypeError, InvalidResourceError, ResourceExistsError,
         ResourceNotExistsError, TombstoneError)
-from lakesuperior.store.ldp_rs.lmdb_triplestore import Imr
+from lakesuperior.model.rdf.graph import Graph, from_rdf
 
 
 LDP_NR_TYPE = nsc['ldp'].NonRDFSource
@@ -37,7 +36,7 @@ class LdpFactory:
             raise InvalidResourceError(uid)
         if rdfly.ask_rsrc_exists(uid):
             raise ResourceExistsError(uid)
-        rsrc = Ldpc(uid, provided_imr=Imr(uri=nsc['fcres'][uid]))
+        rsrc = Ldpc(uid, provided_imr=Graph(uri=nsc['fcres'][uid]))
 
         return rsrc
 
@@ -100,14 +99,15 @@ class LdpFactory:
         """
         uri = nsc['fcres'][uid]
         if rdf_data:
-            data = set(Graph().parse(
-                data=rdf_data, format=rdf_fmt, publicID=nsc['fcres'][uid]))
+            provided_imr = from_rdf(
+                uri=uri, data=rdf_data, format=rdf_fmt,
+                publicID=nsc['fcres'][uid]
+            )
         elif graph:
-            data = set(graph)
+            provided_imr = Graph(uri=uri, data={*graph})
         else:
-            data = set()
+            provided_imr = Graph(uri=uri)
 
-        provided_imr = Imr(uri=uri, data=data)
         #logger.debug('Provided graph: {}'.format(
         #        pformat(set(provided_imr))))
 

lakesuperior/model/ldp_nr.py → lakesuperior/model/ldp/ldp_nr.py

@@ -8,13 +8,13 @@ from rdflib.term import URIRef, Literal, Variable
 
 from lakesuperior import env
 from lakesuperior.dictionaries.namespaces import ns_collection as nsc
-from lakesuperior.model.ldpr import Ldpr
-from lakesuperior.model.ldp_rs import LdpRs
+from lakesuperior.model.ldp.ldpr import Ldpr
+from lakesuperior.model.ldp.ldp_rs import LdpRs
 
 
 nonrdfly = env.app_globals.nonrdfly
 logger = logging.getLogger(__name__)
-
+default_hash_algo = env.app_globals.config['application']['uuid']['algo']
 
 class LdpNr(Ldpr):
     """LDP-NR (Non-RDF Source).
@@ -30,7 +30,8 @@ class LdpNr(Ldpr):
     }
 
     def __init__(self, uuid, stream=None, mimetype=None,
-            disposition=None, **kwargs):
+            disposition=None, prov_cksum_algo=None, prov_cksum=None,
+            **kwargs):
         """
         Extends Ldpr.__init__ by adding LDP-NR specific parameters.
         """
@@ -43,14 +44,16 @@ class LdpNr(Ldpr):
         else:
             self.workflow = self.WRKF_OUTBOUND
 
-        if not mimetype:
+        if mimetype:
+            self.mimetype = mimetype
+        else:
             self.mimetype = (
-                    self.metadata.value(self.uri, nsc['ebucore'].hasMimeType)
+                    str(self.metadata.value(nsc['ebucore'].hasMimeType))
                     if self.is_stored
                     else 'application/octet-stream')
-        else:
-            self.mimetype = mimetype
 
+        self.prov_cksum_algo = prov_cksum_algo
+        self.prov_cksum = prov_cksum
         self.disposition = disposition
 
 
@@ -61,7 +64,7 @@ class LdpNr(Ldpr):
 
         :rtype: str
         """
-        return self.imr.value(self.uri, nsc['ebucore'].filename)
+        return self.metadata.value(nsc['ebucore'].filename)
 
 
     @property
@@ -75,6 +78,16 @@ class LdpNr(Ldpr):
         return open(self.local_path, 'rb')
 
 
+    @property
+    def content_size(self):
+        """
+        Byte size of the binary content.
+
+        :rtype: int
+        """
+        return int(self.metadata.value(nsc['premis'].hasSize))
+
+
     @property
     def local_path(self):
         """
@@ -82,8 +95,8 @@ class LdpNr(Ldpr):
 
         :rtype: str
         """
-        cksum_term = self.imr.value(nsc['premis'].hasMessageDigest)
-        cksum = str(cksum_term.replace('urn:sha1:',''))
+        cksum_term = self.metadata.value(nsc['premis'].hasMessageDigest)
+        cksum = str(cksum_term).replace(f'urn:{default_hash_algo}:','')
         return nonrdfly.__class__.local_path(
                 nonrdfly.root, cksum, nonrdfly.bl, nonrdfly.bc)
 
@@ -96,7 +109,9 @@ class LdpNr(Ldpr):
             updated.
         """
         # Persist the stream.
-        self.digest, self.size = nonrdfly.persist(self.stream)
+        self.digest, self.size = nonrdfly.persist(
+                self.uid, self.stream, prov_cksum_algo=self.prov_cksum_algo,
+                prov_cksum=self.prov_cksum)
 
         # Try to persist metadata. If it fails, delete the file.
         logger.debug('Persisting LDP-NR triples in {}'.format(self.uri))
@@ -129,7 +144,7 @@ class LdpNr(Ldpr):
             self.uri, nsc['premis'].hasSize, Literal(self.size)))
 
         # Checksum.
-        cksum_term = URIRef('urn:sha1:{}'.format(self.digest))
+        cksum_term = URIRef(f'urn:{default_hash_algo}:{self.digest}')
         self.provided_imr.set((
             self.uri, nsc['premis'].hasMessageDigest, cksum_term))
 

lakesuperior/model/ldp_rs.py → lakesuperior/model/ldp/ldp_rs.py

@@ -5,7 +5,7 @@ from rdflib import Graph
 from lakesuperior import env
 from lakesuperior.globals import RES_UPDATED
 from lakesuperior.dictionaries.namespaces import ns_collection as nsc
-from lakesuperior.model.ldpr import Ldpr
+from lakesuperior.model.ldp.ldpr import Ldpr
 
 
 logger = logging.getLogger(__name__)

lakesuperior/model/ldpr.py → lakesuperior/model/ldp/ldpr.py

@@ -12,8 +12,9 @@ from urllib.parse import urldefrag
 from uuid import uuid4
 
 import arrow
+import rdflib
 
-from rdflib import Graph, URIRef, Literal
+from rdflib import URIRef, Literal
 from rdflib.compare import to_isomorphic
 from rdflib.namespace import RDF
 
@@ -26,7 +27,7 @@ from lakesuperior.dictionaries.srv_mgd_terms import (
 from lakesuperior.exceptions import (
     InvalidResourceError, RefIntViolationError, ResourceNotExistsError,
     ServerManagedTermError, TombstoneError)
-from lakesuperior.store.ldp_rs.lmdb_triplestore import SimpleGraph, Imr
+from lakesuperior.model.rdf.graph import Graph
 from lakesuperior.store.ldp_rs.rsrc_centric_layout import VERS_CONT_LABEL
 from lakesuperior.toolbox import Toolbox
 
@@ -47,7 +48,7 @@ class Ldpr(metaclass=ABCMeta):
     **Note**: Even though LdpNr (which is a subclass of Ldpr) handles binary
     files, it still has an RDF representation in the triplestore. Hence, some
     of the RDF-related methods are defined in this class rather than in
-    :class:`~lakesuperior.model.ldp_rs.LdpRs`.
+    :class:`~lakesuperior.model.ldp.ldp_rs.LdpRs`.
 
     **Note:** Only internal facing (``info:fcres``-prefixed) URIs are handled
     in this class. Public-facing URI conversion is handled in the
@@ -130,6 +131,19 @@ class Ldpr(metaclass=ABCMeta):
     }
     """RDF types that don't get versioned."""
 
+    _cached_attrs = (
+        '_imr',
+        '_metadata',
+        '_version_info',
+        '_is_stored',
+        '_types',
+        '_ldp_types',
+    )
+    """
+    Attributes cached from the store.
+
+    These are used by setters and can be cleared with :py:meth:`_clear_cache`.
+    """
 
     ## MAGIC METHODS ##
 
@@ -142,7 +156,7 @@ class Ldpr(metaclass=ABCMeta):
         in which case it will be converted.
         :param dict repr_opts: Options used to retrieve the IMR. See
         `parse_rfc7240` for format details.
-        :param str provd_rdf: RDF data provided by the client in
+        :param str provided_imr: RDF data provided by the client in
         operations such as `PUT` or `POST`, serialized as a string. This sets
         the `provided_imr` property.
         """
@@ -155,6 +169,9 @@ class Ldpr(metaclass=ABCMeta):
 
         self.provided_imr = provided_imr
 
+        # This gets overridden by LDP-NR.
+        self.mimetype = None
+
         # Disable all internal checks e.g. for raw I/O.
 
 
@@ -217,7 +234,7 @@ class Ldpr(metaclass=ABCMeta):
         :param v: New set of triples to populate the IMR with.
         :type v: set or rdflib.Graph
         """
-        self._imr = Imr(self.uri, data=set(data))
+        self._imr = Graph(uri=self.uri, data=set(data))
 
 
     @imr.deleter
@@ -250,8 +267,8 @@ class Ldpr(metaclass=ABCMeta):
         """
         Set resource metadata.
         """
-        if not isinstance(rsrc, Imr):
-            raise TypeError('Provided metadata is not an Imr object.')
+        if not isinstance(rsrc, Graph):
+            raise TypeError('Provided metadata is not a Graph object.')
         self._metadata = rsrc
 
 
@@ -260,7 +277,7 @@ class Ldpr(metaclass=ABCMeta):
         """
         Retun a graph of the resource's IMR formatted for output.
         """
-        out_gr = Graph(identifier=self.uri)
+        out_trp = set()
 
         for t in self.imr:
             if (
@@ -274,9 +291,9 @@ class Ldpr(metaclass=ABCMeta):
                 self._imr_options.get('incl_srv_mgd', True) or
                 not self._is_trp_managed(t)
             ):
-                out_gr.add(t)
+                out_trp.add(t)
 
-        return out_gr
+        return Graph(uri=self.uri, data=out_trp)
 
 
     @property
@@ -288,7 +305,7 @@ class Ldpr(metaclass=ABCMeta):
             try:
                 self._version_info = rdfly.get_version_info(self.uid)
             except ResourceNotExistsError as e:
-                self._version_info = Imr(uri=self.uri)
+                self._version_info = Graph(uri=self.uri)
 
         return self._version_info
 
@@ -388,6 +405,9 @@ class Ldpr(metaclass=ABCMeta):
         identical, are wrappers for this method.
 
         :param boolean create_only: Whether this is a create-only operation.
+        :rtype: str
+
+        :return: Event type: whether the resource was created or updated.
         """
         create = create_only or not self.is_stored
 
@@ -403,12 +423,11 @@ class Ldpr(metaclass=ABCMeta):
 
         remove_trp = {
             (self.uri, pred, None) for pred in self.delete_preds_on_replace}
-        add_trp = set(
-            self.provided_imr | self._containment_rel(create))
+        add_trp = {*self.provided_imr} | self._containment_rel(create)
 
         self.modify(ev_type, remove_trp, add_trp)
 
-        self.imr = add_trp
+        #self.imr = add_trp
 
         return ev_type
 
@@ -443,7 +462,7 @@ class Ldpr(metaclass=ABCMeta):
             }
 
         # Bury descendants.
-        from lakesuperior.model.ldp_factory import LdpFactory
+        from lakesuperior.model.ldp.ldp_factory import LdpFactory
         for desc_uri in rdfly.get_descendants(self.uid):
             try:
                 desc_rsrc = LdpFactory.from_stored(
@@ -494,7 +513,7 @@ class Ldpr(metaclass=ABCMeta):
         self.modify(RES_CREATED, remove_trp, add_trp)
 
         # Resurrect descendants.
-        from lakesuperior.model.ldp_factory import LdpFactory
+        from lakesuperior.model.ldp.ldp_factory import LdpFactory
         descendants = env.app_globals.rdfly.get_descendants(self.uid)
         for desc_uri in descendants:
             LdpFactory.from_stored(
@@ -564,50 +583,54 @@ class Ldpr(metaclass=ABCMeta):
 
         ver_gr = rdfly.get_imr(
             self.uid, ver_uid=ver_uid, incl_children=False)
-        self.provided_imr = Imr(uri=self.uri)
+        self.provided_imr = Graph(uri=self.uri)
 
         for t in ver_gr:
             if not self._is_trp_managed(t):
-                self.provided_imr.add((self.uri, t[1], t[2]))
+                self.provided_imr.add(((self.uri, t[1], t[2]),))
             # @TODO Check individual objects: if they are repo-managed URIs
             # and not existing or tombstones, they are not added.
 
         return self.create_or_replace(create_only=False)
 
 
-    def check_mgd_terms(self, gr):
+    def check_mgd_terms(self, trp):
         """
         Check whether server-managed terms are in a RDF payload.
 
-        :param SimpleGraph gr: The graph to validate.
+        :param SimpleGraph trp: The graph to validate.
         """
-        offending_subjects = gr.terms('s') & srv_mgd_subjects
+        offending_subjects = (
+            {t[0] for t in trp if t[0] is not None} & srv_mgd_subjects
+        )
         if offending_subjects:
             if self.handling == 'strict':
                 raise ServerManagedTermError(offending_subjects, 's')
             else:
-                gr_set = set(gr)
                 for s in offending_subjects:
                     logger.info('Removing offending subj: {}'.format(s))
-                    for t in gr_set:
+                    for t in trp:
                         if t[0] == s:
-                            gr.remove(t)
+                            trp.remove(t)
 
-        offending_predicates = gr.terms('p') & srv_mgd_predicates
+        offending_predicates = (
+            {t[1] for t in trp if t[1] is not None} & srv_mgd_predicates
+        )
         # Allow some predicates if the resource is being created.
         if offending_predicates:
             if self.handling == 'strict':
                 raise ServerManagedTermError(offending_predicates, 'p')
             else:
-                gr_set = set(gr)
                 for p in offending_predicates:
                     logger.info('Removing offending pred: {}'.format(p))
-                    for t in gr_set:
+                    for t in trp:
                         if t[1] == p:
-                            gr.remove(t)
+                            trp.remove(t)
 
-        types = {t[2] for t in gr if t[1] == RDF.type}
-        offending_types = types & srv_mgd_types
+        offending_types = (
+            {t[2] for t in trp if t[1] == RDF.type and t[2] is not None}
+            & srv_mgd_types
+        )
         if not self.is_stored:
             offending_types -= self.smt_allow_on_create
         if offending_types:
@@ -616,11 +639,11 @@ class Ldpr(metaclass=ABCMeta):
             else:
                 for to in offending_types:
                     logger.info('Removing offending type: {}'.format(to))
-                    gr.remove_triples((None, RDF.type, to))
+                    trp.remove_triples((None, RDF.type, to))
 
-        #logger.debug('Sanitized graph: {}'.format(gr.serialize(
+        #logger.debug('Sanitized graph: {}'.format(trp.serialize(
         #    format='turtle').decode('utf-8')))
-        return gr
+        return trp
 
 
     def sparql_delta(self, qry_str):
@@ -653,16 +676,15 @@ class Ldpr(metaclass=ABCMeta):
         qry_str = (
                 re.sub('<#([^>]+)>', '<{}#\\1>'.format(self.uri), qry_str)
                 .replace('<>', '<{}>'.format(self.uri)))
-        pre_gr = self.imr.graph
-        post_rdfgr = Graph(identifier=self.uri)
-        post_rdfgr += pre_gr
+        pre_gr = self.imr.as_rdflib()
+        post_gr = rdflib.Graph(identifier=self.uri)
+        post_gr |= pre_gr
 
-        post_rdfgr.update(qry_str)
-        post_gr = SimpleGraph(data=set(post_rdfgr))
+        post_gr.update(qry_str)
 
         # FIXME Fix and  use SimpleGraph's native subtraction operation.
-        remove_gr = self.check_mgd_terms(SimpleGraph(pre_gr.data - post_gr.data))
-        add_gr = self.check_mgd_terms(SimpleGraph(post_gr.data - pre_gr.data))
+        remove_gr = self.check_mgd_terms(Graph(data=set(pre_gr - post_gr)))
+        add_gr = self.check_mgd_terms(Graph(data=set(post_gr - pre_gr)))
 
         return remove_gr, add_gr
 
@@ -699,21 +721,35 @@ class Ldpr(metaclass=ABCMeta):
         """
         rdfly.modify_rsrc(self.uid, remove_trp, add_trp)
 
-        # Reset IMR buffer.
-        if hasattr(self, '_imr'):
-            delattr(self, '_imr')
-            try:
-                self.imr
-            except (ResourceNotExistsError, TombstoneError):
-                pass
+        self._clear_cache()
+        # Reload IMR because if we exit the LMDB txn we lose access to stored
+        # memory locations.
+        try:
+            self.imr
+        except:
+            pass
 
         if (
                 ev_type is not None and
                 env.app_globals.config['application'].get('messaging')):
-            logger.debug('Enqueuing message for {}'.format(self.uid))
+            logger.debug(f'Enqueuing message for {self.uid}')
             self._enqueue_msg(ev_type, remove_trp, add_trp)
 
 
+    def _clear_cache(self):
+        """
+        Clear stale model attributes.
+
+        This method removes class members populated with data pulled from the
+        store that may have become stale after a resource update.
+        """
+        for attr in self._cached_attrs:
+            try:
+                delattr(self, attr)
+            except AttributeError:
+                pass
+
+
     def _enqueue_msg(self, ev_type, remove_trp=None, add_trp=None):
         """
         Compose a message about a resource change.
@@ -727,7 +763,7 @@ class Ldpr(metaclass=ABCMeta):
             rsrc_type = tuple(str(t) for t in self.types)
             actor = self.metadata.value(nsc['fcrepo'].createdBy)
         except (ResourceNotExistsError, TombstoneError):
-            rsrc_type = ()
+            rsrc_type = set()
             actor = None
             for t in add_trp:
                 if t[1] == RDF.type:
@@ -771,7 +807,7 @@ class Ldpr(metaclass=ABCMeta):
             logger.info(
                 'Removing link to non-existent repo resource: {}'
                 .format(obj))
-            self.provided_imr.remove_triples((None, None, obj))
+            self.provided_imr.remove((None, None, obj))
 
 
     def _add_srv_mgd_triples(self, create=False):
@@ -781,8 +817,9 @@ class Ldpr(metaclass=ABCMeta):
         :param create: Whether the resource is being created.
         """
         # Base LDP types.
-        for t in self.base_types:
-            self.provided_imr.add((self.uri, RDF.type, t))
+        self.provided_imr.add(
+            [(self.uri, RDF.type, t) for t in self.base_types]
+        )
 
         # Create and modify timestamp.
         if create:
@@ -829,7 +866,7 @@ class Ldpr(metaclass=ABCMeta):
         a LDP-NR has "children" under ``fcr:versions``) by setting this to
         True.
         """
-        from lakesuperior.model.ldp_factory import LdpFactory
+        from lakesuperior.model.ldp.ldp_factory import LdpFactory
 
         if '/' in self.uid.lstrip('/'):
             # Traverse up the hierarchy to find the parent.
@@ -859,8 +896,9 @@ class Ldpr(metaclass=ABCMeta):
         # Only update parent if the resource is new.
         if create:
             add_gr = Graph()
-            add_gr.add(
-                (nsc['fcres'][parent_uid], nsc['ldp'].contains, self.uri))
+            add_gr.add({
+                (nsc['fcres'][parent_uid], nsc['ldp'].contains, self.uri)
+            })
             parent_rsrc.modify(RES_UPDATED, add_trp=add_gr)
 
         # Direct or indirect container relationship.
@@ -873,7 +911,7 @@ class Ldpr(metaclass=ABCMeta):
 
         :param rdflib.resource.Resouce cont_rsrc:  The container resource.
         """
-        cont_p = cont_rsrc.metadata.terms('p')
+        cont_p = cont_rsrc.metadata.terms_by_type('p')
 
         logger.info('Checking direct or indirect containment.')
         logger.debug('Parent predicates: {}'.format(cont_p))
@@ -881,7 +919,7 @@ class Ldpr(metaclass=ABCMeta):
         add_trp = {(self.uri, nsc['fcrepo'].hasParent, cont_rsrc.uri)}
 
         if self.MBR_RSRC_URI in cont_p and self.MBR_REL_URI in cont_p:
-            from lakesuperior.model.ldp_factory import LdpFactory
+            from lakesuperior.model.ldp.ldp_factory import LdpFactory
 
             s = cont_rsrc.metadata.value(self.MBR_RSRC_URI)
             p = cont_rsrc.metadata.value(self.MBR_REL_URI)

lakesuperior/model/rdf/graph.pxd

@@ -0,0 +1,37 @@
+from libc.stdint cimport uint32_t, uint64_t
+
+from cymem.cymem cimport Pool
+
+cimport lakesuperior.cy_include.collections as cc
+
+from lakesuperior.model.base cimport Key, TripleKey
+from lakesuperior.model.rdf.triple cimport BufferTriple
+from lakesuperior.model.structures.keyset cimport Keyset
+from lakesuperior.store.ldp_rs cimport lmdb_triplestore
+
+# Callback for an iterator.
+ctypedef void (*lookup_callback_fn_t)(
+    Graph gr, const TripleKey* spok_p, void* ctx
+)
+
+cdef class Graph:
+    cdef:
+        readonly lmdb_triplestore.LmdbTriplestore store
+        public Keyset keys
+        public object uri
+
+        cc.key_compare_ft term_cmp_fn
+        cc.key_compare_ft trp_cmp_fn
+
+        void _match_ptn_callback(
+            self, pattern, Graph gr, lookup_callback_fn_t callback_fn,
+            bint callback_cond=*, void* ctx=*
+        ) except *
+
+    cpdef Graph copy(self, str uri=*)
+    cpdef Graph empty_copy(self, str uri=*)
+    cpdef void set(self, tuple trp) except *
+
+
+cdef:
+    void add_trp_callback(Graph gr, const TripleKey* spok_p, void* ctx)

lakesuperior/model/rdf/graph.pyx

@@ -0,0 +1,613 @@
+import logging
+
+import rdflib
+
+from lakesuperior import env
+
+from cpython.object cimport Py_LT, Py_EQ, Py_GT, Py_LE, Py_NE, Py_GE
+from libc.string cimport memcpy
+from libc.stdlib cimport free
+
+cimport lakesuperior.cy_include.collections as cc
+cimport lakesuperior.model.callbacks as cb
+cimport lakesuperior.model.structures.keyset as kset
+
+from lakesuperior.model.base cimport Key, TripleKey
+from lakesuperior.model.rdf cimport term
+from lakesuperior.model.rdf.triple cimport BufferTriple
+from lakesuperior.model.structures.hash cimport term_hash_seed32
+from lakesuperior.model.structures.keyset cimport Keyset
+
+logger = logging.getLogger(__name__)
+
+
+cdef class Graph:
+    """
+    Fast and simple implementation of a graph.
+
+    Most functions should mimic RDFLib's graph with less overhead. It uses
+    the same funny but functional slicing notation.
+
+    A Graph contains a :py:class:`lakesuperior.model.structures.keyset.Keyset`
+    at its core and is bound to a
+    :py:class:`~lakesuperior.store.ldp_rs.lmdb_triplestore.LmdbTriplestore`.
+    This makes lookups and boolean operations very efficient because all these
+    operations are performed on an array of integers.
+
+    In order to retrieve RDF values from a ``Graph``, the underlying store
+    must be looked up. This can be done in a different transaction than the
+    one used to create or otherwise manipulate the graph.
+
+    Every time a term is looked up or added to even a temporary graph, that
+    term is added to the store and creates a key. This is because in the
+    majority of cases that term is likely to be stored permanently anyway, and
+    it's more efficient to hash it and allocate it immediately. A cleanup
+    function to remove all orphaned terms (not in any triple or context index)
+    can be later devised to compact the database.
+
+    An instance of this class can also be converted to a ``rdflib.Graph``
+    instance.
+    """
+
+    def __cinit__(
+        self, store=None, size_t capacity=0, uri=None, set data=set()
+    ):
+        """
+        Initialize the graph, optionally from Python/RDFlib data.
+
+        When initializing a non-empty Graph, a store transaction must be
+        opened::
+
+            >>> from rdflib import URIRef
+            >>> from lakesuperior import env_setup, env
+            >>> store = env.app_globals.rdf_store
+            >>> # Or alternatively:
+            >>> # from lakesuperior.store.ldp_rs.lmdb_store import LmdbStore
+            >>> # store = LmdbStore('/tmp/test')
+            >>> trp = {(URIRef('urn:s:0'), URIRef('urn:p:0'), URIRef('urn:o:0'))}
+            >>> with store.txn_ctx():
+            >>>     gr = Graph(store, data=trp)
+
+        Similarly, any operation such as adding, changing or looking up triples
+        needs a store transaction.
+
+        Note that, even though any operation may involve adding new terms to
+        the store, a read-only transaction is sufficient. Lakesuperior will
+        open a write transaction automatically only if necessary and only for
+        the time needed to enter the new terms.
+
+        :type store: lakesuperior.store.ldp_rs.lmdb_triplestore.LmdbTriplestore
+        :param store: Triplestore where keys are mapped to terms. By default
+            this is the default application store
+            (``env.app_globals.rdf_store``).
+
+        :param size_t capacity: Initial number of allocated triples.
+
+        :param str uri: If specified, the graph becomes a named graph and can
+            utilize the :py:meth:`value()` method and special slicing notation.
+
+        :param set data: If specified, ``capacity`` is ignored and an initial key
+            set is created from a set of 3-tuples of :py:class:``rdflib.Term``
+            instances.
+        """
+        self.uri = rdflib.URIRef(uri) if uri else None
+
+        self.store = store if store is not None else env.app_globals.rdf_store
+        #logger.debug(f'Assigned store at {self.store.env_path}')
+
+        # Initialize empty data set.
+        if data:
+            # Populate with provided Python set.
+            self.keys = Keyset(len(data))
+            self.add(data)
+        else:
+            self.keys = Keyset(capacity)
+
+
+    ## PROPERTIES ##
+
+    property data:
+        def __get__(self):
+            """
+            Triple data as a Python/RDFlib set.
+
+            :rtype: set
+            """
+            cdef TripleKey spok
+
+            ret = set()
+
+            self.keys.seek()
+            while self.keys.get_next(&spok):
+                ret.add((
+                    self.store.from_key(spok[0]),
+                    self.store.from_key(spok[1]),
+                    self.store.from_key(spok[2])
+                ))
+
+            return ret
+
+
+    property capacity:
+        def __get__(self):
+            """
+            Total capacity of the underlying Keyset, in number of triples.
+            """
+            return self.keys.capacity
+
+
+    property txn_ctx:
+        def __get__(self):
+            """ Expose underlying store's ``txn_ctx``. """
+            return self.store.txn_ctx
+
+
+    ## MAGIC METHODS ##
+
+    def __len__(self):
+        """ Number of triples in the graph. """
+        return self.keys.size()
+
+
+    def __richcmp__(self, other, int op):
+        """ Comparators between ``Graph`` instances. """
+        if op == Py_LT:
+            raise NotImplementedError()
+        elif op == Py_EQ:
+            return len(self ^ other) == 0
+        elif op == Py_GT:
+            raise NotImplementedError()
+        elif op == Py_LE:
+            raise NotImplementedError()
+        elif op == Py_NE:
+            return len(self ^ other) != 0
+        elif op == Py_GE:
+            raise NotImplementedError()
+
+
+    def __repr__(self):
+        """
+        String representation of the graph.
+
+        This includes the subject URI, number of triples contained and the
+        memory address of the instance.
+        """
+        uri_repr = f', uri={self.uri}' if self.uri else ''
+        return (
+            f'<{self.__class__.__module__}.{self.__class__.__qualname__} '
+            f'@0x{id(self):02x} length={len(self)}{uri_repr}>'
+        )
+
+
+    def __str__(self):
+        """ String dump of the graph triples. """
+        return str(self.data)
+
+
+    def __add__(self, other):
+        """ Alias for set-theoretical union. """
+        return self.__or__(other)
+
+
+    def __iadd__(self, other):
+        """ Alias for in-place set-theoretical union. """
+        return self.__ior__(other)
+
+
+    def __sub__(self, other):
+        """ Set-theoretical subtraction. """
+        cdef Graph gr3 = self.empty_copy()
+
+        gr3.keys = kset.subtract(self.keys, other.keys)
+
+        return gr3
+
+
+    def __isub__(self, other):
+        """ In-place set-theoretical subtraction. """
+        self.keys = kset.subtract(self.keys, other.keys)
+
+        return self
+
+    def __and__(self, other):
+        """ Set-theoretical intersection. """
+        cdef Graph gr3 = self.empty_copy()
+
+        gr3.keys = kset.intersect(self.keys, other.keys)
+
+        return gr3
+
+
+    def __iand__(self, other):
+        """ In-place set-theoretical intersection. """
+        self.keys = kset.intersect(self.keys, other.keys)
+
+        return self
+
+
+    def __or__(self, other):
+        """ Set-theoretical union. """
+        cdef Graph gr3 = self.empty_copy()
+
+        gr3.keys = kset.merge(self.keys, other.keys)
+
+        return gr3
+
+
+    def __ior__(self, other):
+        """ In-place set-theoretical union. """
+        self.keys = kset.merge(self.keys, other.keys)
+
+        return self
+
+
+    def __xor__(self, other):
+        """ Set-theoretical exclusive disjunction (XOR). """
+        cdef Graph gr3 = self.empty_copy()
+
+        gr3.keys = kset.xor(self.keys, other.keys)
+
+        return gr3
+
+
+    def __ixor__(self, other):
+        """ In-place set-theoretical exclusive disjunction (XOR). """
+        self.keys = kset.xor(self.keys, other.keys)
+
+        return self
+
+
+    def __contains__(self, trp):
+        """
+        Whether the graph contains a triple.
+
+        :rtype: boolean
+        """
+        cdef TripleKey spok
+
+        spok = [
+            self.store.to_key(trp[0]),
+            self.store.to_key(trp[1]),
+            self.store.to_key(trp[2]),
+        ]
+
+        return self.keys.contains(&spok)
+
+
+    def __iter__(self):
+        """ Graph iterator. It iterates over the set triples. """
+        yield from self.data
+
+
+    # Slicing.
+
+    def __getitem__(self, item):
+        """
+        Slicing function.
+
+        It behaves similarly to `RDFLib graph slicing
+        <https://rdflib.readthedocs.io/en/stable/utilities.html#slicing-graphs>`__
+        """
+        if isinstance(item, slice):
+            s, p, o = item.start, item.stop, item.step
+            return self._slice(s, p, o)
+        elif self.uri and isinstance(item, rdflib.term.Identifier):
+            # If a Node is given, return all values for that predicate.
+            return self._slice(self.uri, item, None)
+        else:
+            raise TypeError(f'Wrong slice format: {item}.')
+
+
+    def __hash__(self):
+        """ TODO Not that great of a hash. """
+        return id(self)
+
+
+    ## BASIC PYTHON-ACCESSIBLE SET OPERATIONS ##
+
+    def value(self, p, strict=False):
+        """
+        Get an individual value.
+
+        :param rdflib.termNode p: Predicate to search for.
+        :param bool strict: If set to ``True`` the method raises an error if
+            more than one value is found. If ``False`` (the default) only
+            the first found result is returned.
+        :rtype: rdflib.term.Node
+        """
+        if not self.uri:
+            raise ValueError('Cannot use `value` on a non-named graph.')
+
+        # TODO use slice.
+        values = {trp[2] for trp in self.lookup((self.uri, p, None))}
+
+        if strict and len(values) > 1:
+            raise RuntimeError('More than one value found for {}, {}.'.format(
+                    self.uri, p))
+
+        for ret in values:
+            return ret
+
+        return None
+
+
+    def terms_by_type(self, type):
+        """
+        Get all terms of a type: subject, predicate or object.
+
+        :param str type: One of ``s``, ``p`` or ``o``.
+        """
+        i = 'spo'.index(type)
+        return {r[i] for r in self.data}
+
+
+    def add(self, triples):
+        """
+        Add triples to the graph.
+
+        This method checks for duplicates.
+
+        :param iterable triples: iterable of 3-tuple triples.
+        """
+        cdef:
+            TripleKey spok
+
+        for s, p, o in triples:
+            #logger.info(f'Adding {s} {p} {o} to store: {self.store}')
+            spok = [
+                self.store.to_key(s),
+                self.store.to_key(p),
+                self.store.to_key(o),
+            ]
+
+            self.keys.add(&spok, True)
+
+
+    def remove(self, pattern):
+        """
+        Remove triples by pattern.
+
+        The pattern used is similar to :py:meth:`LmdbTripleStore.delete`.
+        """
+        # create an empty copy of the current object.
+        new_gr = self.empty_copy()
+
+        # Reverse lookup: only triples not matching the pattern are added to
+        # the new set.
+        self._match_ptn_callback(
+            pattern, new_gr, add_trp_callback, False
+        )
+
+        # Replace the keyset.
+        self.keys = new_gr.keys
+
+
+    ## CYTHON-ACCESSIBLE BASIC METHODS ##
+
+    cpdef Graph copy(self, str uri=None):
+        """
+        Create copy of the graph with a different (or no) URI.
+
+        :param str uri: URI of the new graph. This should be different from
+            the original.
+        """
+        cdef Graph new_gr = Graph(self.store, self.capacity, uri=uri)
+
+        new_gr.keys = self.keys.copy()
+
+        return new_gr
+
+
+    cpdef Graph empty_copy(self, str uri=None):
+        """
+        Create an empty copy with same capacity and store binding.
+
+        :param str uri: URI of the new graph. This should be different from
+            the original.
+        """
+        return Graph(self.store, self.capacity, uri=uri)
+
+
+    cpdef void set(self, tuple trp) except *:
+        """
+        Set a single value for subject and predicate.
+
+        Remove all triples matching ``s`` and ``p`` before adding ``s p o``.
+        """
+        if None in trp:
+            raise ValueError(f'Invalid triple: {trp}')
+        self.remove((trp[0], trp[1], None))
+        self.add((trp,))
+
+
+    def as_rdflib(self):
+        """
+        Return the data set as an RDFLib Graph.
+
+        :rtype: rdflib.Graph
+        """
+        gr = rdflib.Graph(identifier=self.uri)
+        for trp in self.data:
+            gr.add(trp)
+
+        return gr
+
+
+    def _slice(self, s, p, o):
+        """
+        Return terms filtered by other terms.
+
+        This behaves like the rdflib.Graph slicing policy.
+        """
+        #logger.info(f'Slicing: {s} {p} {o}')
+        # If no terms are unbound, check for containment.
+        if s is not None and p is not None and o is not None: # s p o
+            return (s, p, o) in self
+
+        # If some terms are unbound, do a lookup.
+        res = self.lookup((s, p, o))
+        #logger.info(f'Slicing results: {res}')
+        if s is not None:
+            if p is not None: # s p ?
+                return {r[2] for r in res}
+
+            if o is not None: # s ? o
+                return {r[1] for r in res}
+
+            # s ? ?
+            return {(r[1], r[2]) for r in res}
+
+        if p is not None:
+            if o is not None: # ? p o
+                return {r[0] for r in res}
+
+            # ? p ?
+            return {(r[0], r[2]) for r in res}
+
+        if o is not None: # ? ? o
+            return {(r[0], r[1]) for r in res}
+
+        # ? ? ?
+        return res
+
+
+    def lookup(self, pattern):
+        """
+        Look up triples by a pattern.
+
+        This function converts RDFLib terms into the serialized format stored
+        in the graph's internal structure and compares them bytewise.
+
+        Any and all of the lookup terms msy be ``None``.
+
+        :rtype: Graph
+        "return: New Graph instance with matching triples.
+        """
+        cdef:
+            Graph res_gr = self.empty_copy()
+
+        self._match_ptn_callback(pattern, res_gr, add_trp_callback)
+        res_gr.keys.resize()
+
+        return res_gr
+
+
+    cdef void _match_ptn_callback(
+        self, pattern, Graph gr, lookup_callback_fn_t callback_fn,
+        bint callback_cond=True, void* ctx=NULL
+    ) except *:
+        """
+        Execute an arbitrary function on a list of triples matching a pattern.
+
+        The arbitrary function is applied to each triple found in the current
+        graph, and to a discrete graph that can be the current graph itself
+        or a different one.
+
+        :param tuple pattern: A 3-tuple of rdflib terms or None.
+        :param Graph gr: The graph instance to apply the callback function to.
+        :param lookup_callback_fn_t callback_fn: A callback function to be
+            applied to the target graph using the matching triples.
+        :param bint callback_cond: Whether to apply the callback function if
+            a match is found (``True``) or if it is not found (``False``).
+        :param void* ctx: Pointer to an arbitrary object that can be used by
+            the callback function.
+        """
+        cdef:
+            kset.key_cmp_fn_t cmp_fn
+            Key k1, k2, k3
+            TripleKey spok
+
+        s, p, o = pattern
+
+        #logger.info(f'Match Callback pattern: {pattern}')
+
+        self.keys.seek()
+        # Decide comparison logic outside the loop.
+        if all(pattern):
+            if callback_cond:
+                # Shortcut for 3-term match—only if callback_cond is True.
+                spok = [
+                    self.store.to_key(s),
+                    self.store.to_key(p),
+                    self.store.to_key(o),
+                ]
+                if self.keys.contains(&spok):
+                    callback_fn(gr, &spok, ctx)
+            else:
+                # For negative condition (i.e. "apply this function to all keys
+                # except the matching one"), the whole set must be scanned.
+                #logger.info('All terms bound and negative condition.')
+                k1 = self.store.to_key(s)
+                k2 = self.store.to_key(p)
+                k3 = self.store.to_key(o)
+                #logger.info(f'Keys to match: {k1} {k2} {k3}')
+                while self.keys.get_next(&spok):
+                    #logger.info(f'Verifying spok: {spok}')
+                    if k1 != spok[0] or k2 != spok[1] or k3 != spok[2]:
+                        #logger.info(f'Calling function for spok: {spok}')
+                        callback_fn(gr, &spok, ctx)
+            return
+
+        if s is not None:
+            k1 = self.store.to_key(s)
+            if p is not None:
+                k2 = self.store.to_key(p)
+                cmp_fn = cb.lookup_skpk_cmp_fn
+            elif o is not None:
+                k2 = self.store.to_key(o)
+                cmp_fn = cb.lookup_skok_cmp_fn
+            else:
+                cmp_fn = cb.lookup_sk_cmp_fn
+        elif p is not None:
+            k1 = self.store.to_key(p)
+            if o is not None:
+                k2 = self.store.to_key(o)
+                cmp_fn = cb.lookup_pkok_cmp_fn
+            else:
+                cmp_fn = cb.lookup_pk_cmp_fn
+        elif o is not None:
+            k1 = self.store.to_key(o)
+            cmp_fn = cb.lookup_ok_cmp_fn
+        else:
+            cmp_fn = cb.lookup_none_cmp_fn
+
+        # Iterate over serialized triples.
+        while self.keys.get_next(&spok):
+            if cmp_fn(&spok, k1, k2) == callback_cond:
+                callback_fn(gr, &spok, ctx)
+
+
+
+## FACTORY METHODS
+
+def from_rdf(store=None, uri=None, *args, **kwargs):
+    """
+    Create a Graph from a serialized RDF string.
+
+    This factory function takes the same arguments as
+    :py:meth:`rdflib.Graph.parse`.
+
+    :param store: see :py:meth:`Graph.__cinit__`.
+
+    :param uri: see :py:meth:`Graph.__cinit__`.
+
+    :param *args: Positional arguments passed to RDFlib's ``parse``.
+
+    :param *kwargs: Keyword arguments passed to RDFlib's ``parse``.
+
+    :rtype: Graph
+    """
+    gr = rdflib.Graph().parse(*args, **kwargs)
+
+    return Graph(store=store, uri=uri, data={*gr})
+
+
+## LOOKUP CALLBACK FUNCTIONS
+
+cdef inline void add_trp_callback(
+    Graph gr, const TripleKey* spok_p, void* ctx
+):
+    """
+    Add a triple to a graph as a result of a lookup callback.
+    """
+    gr.keys.add(spok_p)

lakesuperior/model/rdf/term.pxd

@@ -0,0 +1,41 @@
+from cymem.cymem cimport Pool
+
+from lakesuperior.model.base cimport Buffer
+
+#cdef extern from "regex.h" nogil:
+#   ctypedef struct regmatch_t:
+#      int rm_so
+#      int rm_eo
+#   ctypedef struct regex_t:
+#      pass
+#   int REG_NOSUB, REG_NOMATCH
+#   int regcomp(regex_t* preg, const char* regex, int cflags)
+#   int regexec(
+#       const regex_t *preg, const char* string, size_t nmatch,
+#       regmatch_t pmatch[], int eflags
+#    )
+#   void regfree(regex_t* preg)
+
+
+ctypedef struct Term:
+    char type
+    char *data
+    char *datatype
+    char *lang
+
+cdef:
+    #int term_new(
+    #    Term* term, char type, char* data, char* datatype=*, char* lang=*
+    #) except -1
+    #regex_t uri_regex
+    # Temporary TPL variable.
+    #char* _pk
+
+    int serialize(const Term *term, Buffer *sterm, Pool pool=*) except -1
+    int deserialize(const Buffer *data, Term *term) except -1
+    int from_rdflib(term_obj, Term *term) except -1
+    int serialize_from_rdflib(term_obj, Buffer *data, Pool pool=*) except -1
+    object deserialize_to_rdflib(const Buffer *data)
+    object to_rdflib(const Term *term)
+    object to_bytes(const Term *term)
+

lakesuperior/model/rdf/term.pyx

@@ -0,0 +1,191 @@
+from uuid import uuid4
+
+from rdflib import URIRef, BNode, Literal
+
+#from cpython.mem cimport PyMem_Malloc, PyMem_Free
+from libc.stdint cimport uint64_t
+from libc.stdlib cimport free
+from libc.string cimport memcpy
+
+from cymem.cymem cimport Pool
+
+from lakesuperior.cy_include cimport cytpl as tpl
+from lakesuperior.model.base cimport Buffer, buffer_dump
+
+
+DEF LSUP_TERM_TYPE_URIREF = 1
+DEF LSUP_TERM_TYPE_BNODE = 2
+DEF LSUP_TERM_TYPE_LITERAL = 3
+DEF LSUP_TERM_PK_FMT = b'csss' # Reflects the Term structure
+DEF LSUP_TERM_STRUCT_PK_FMT = b'S(' + LSUP_TERM_PK_FMT + b')'
+# URI parsing regular expression. Conforms to RFC3986.
+#DEF URI_REGEX_STR = (
+#    b'^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?'
+#)
+
+#cdef char* ptn = URI_REGEX_STR
+#regcomp(&uri_regex, ptn, REG_NOSUB)
+# Compile with no catch groups.
+# TODO This should be properly cleaned up on application shutdown:
+# regfree(&uri_regex)
+
+#cdef int term_new(
+#    Term* term, char type, char* data, char* datatype=NULL, char* lang=NULL
+#) except -1:
+#    if regexec(&uri_regex, data, 0, NULL, 0) == REG_NOMATCH:
+#        raise ValueError('Not a valid URI.')
+#    term.type = type
+#    term.data = (
+#        data # TODO use C UUID v4 (RFC 4122) generator
+#        if term.type == LSUP_TERM_TYPE_BNODE
+#        else data
+#    )
+#    if term.type == LSUP_TERM_TYPE_LITERAL:
+#        term.datatype = datatype
+#        term.lang = lang
+#
+#    return 0
+
+
+cdef int serialize(const Term *term, Buffer *sterm, Pool pool=None) except -1:
+    """
+    Serialize a Term into a binary buffer.
+
+    The returned result is dynamically allocated in the provided memory pool.
+    """
+    cdef:
+        unsigned char *addr
+        size_t sz
+
+    tpl.tpl_jot(tpl.TPL_MEM, &addr, &sz, LSUP_TERM_STRUCT_PK_FMT, term)
+    if pool is None:
+        sterm.addr = addr
+    else:
+        # addr is within this function scope. Must be copied to the cymem pool.
+        sterm.addr = pool.alloc(sz, 1)
+        if not sterm.addr:
+            raise MemoryError()
+        memcpy(sterm.addr, addr, sz)
+    sterm.sz = sz
+
+
+cdef int deserialize(const Buffer *data, Term *term) except -1:
+    """
+    Return a term from serialized binary data.
+    """
+    #print(f'Deserializing: {buffer_dump(data)}')
+    _pk = tpl.tpl_peek(
+            tpl.TPL_MEM | tpl.TPL_DATAPEEK, data[0].addr, data[0].sz,
+            LSUP_TERM_PK_FMT, &(term[0].type), &(term[0].data),
+            &(term[0].datatype), &(term[0].lang))
+
+    if _pk is NULL:
+        raise MemoryError('Error deserializing term.')
+    else:
+        free(_pk)
+
+
+cdef int from_rdflib(term_obj, Term *term) except -1:
+    """
+    Return a Term struct obtained from a Python/RDFLib term.
+    """
+    _data = str(term_obj).encode()
+    term[0].data = _data
+
+    if isinstance(term_obj, Literal):
+        _datatype = (getattr(term_obj, 'datatype') or '').encode()
+        _lang = (getattr(term_obj, 'language') or '').encode()
+        term[0].type = LSUP_TERM_TYPE_LITERAL
+        term[0].datatype = _datatype
+        term[0].lang = _lang
+    else:
+        term[0].datatype = NULL
+        term[0].lang = NULL
+        if isinstance(term_obj, URIRef):
+            term[0].type = LSUP_TERM_TYPE_URIREF
+        elif isinstance(term_obj, BNode):
+            term[0].type = LSUP_TERM_TYPE_BNODE
+        else:
+            raise ValueError(f'Unsupported term type: {type(term_obj)}')
+
+
+cdef int serialize_from_rdflib(
+        term_obj, Buffer *data, Pool pool=None
+    ) except -1:
+    """
+    Return a Buffer struct from a Python/RDFLib term.
+    """
+
+    cdef:
+        Term _term
+        void *addr
+        size_t sz
+
+    # From RDFlib
+    _data = str(term_obj).encode()
+    _term.data = _data
+
+    if isinstance(term_obj, Literal):
+        _datatype = (getattr(term_obj, 'datatype') or '').encode()
+        _lang = (getattr(term_obj, 'language') or '').encode()
+        _term.type = LSUP_TERM_TYPE_LITERAL
+        _term.datatype = _datatype
+        _term.lang = _lang
+    else:
+        _term.datatype = NULL
+        _term.lang = NULL
+        if isinstance(term_obj, URIRef):
+            _term.type = LSUP_TERM_TYPE_URIREF
+        elif isinstance(term_obj, BNode):
+            _term.type = LSUP_TERM_TYPE_BNODE
+        else:
+            raise ValueError(
+                f'Unsupported term type: {term_obj} {type(term_obj)}'
+            )
+
+    serialize(&_term, data, pool)
+
+
+cdef object to_rdflib(const Term *term):
+    """
+    Return an RDFLib term.
+    """
+    cdef str data = (<bytes>term.data).decode()
+    if term[0].type == LSUP_TERM_TYPE_LITERAL:
+        return Literal(
+            data,
+            datatype=term.datatype if not term.lang else None,
+            lang=term.lang or None
+        )
+    else:
+        if term.type == LSUP_TERM_TYPE_URIREF:
+            return URIRef(data)
+        elif term.type == LSUP_TERM_TYPE_BNODE:
+            return BNode(data)
+        else:
+            raise IOError(f'Unknown term type code: {term[0].type}')
+
+
+cdef object deserialize_to_rdflib(const Buffer *data):
+    """
+    Return a Python/RDFLib term from a serialized Cython term.
+    """
+    cdef Term t
+
+    deserialize(data, &t)
+
+    return to_rdflib(&t)
+
+
+cdef object to_bytes(const Term *term):
+    """
+    Return a Python bytes object of the serialized term.
+    """
+    cdef:
+        Buffer pk_t
+        unsigned char *bytestream
+
+    serialize(term, &pk_t)
+    bytestream = <unsigned char *>pk_t.addr
+
+    return <bytes>(bytestream)[:pk_t.sz]

lakesuperior/model/rdf/triple.pxd

@@ -0,0 +1,19 @@
+#from lakesuperior.cy_include cimport cytpl as tpl
+from lakesuperior.model.base cimport Buffer
+from lakesuperior.model.rdf.term cimport Term
+
+# Triple of Term structs.
+ctypedef struct Triple:
+    Term *s
+    Term *p
+    Term *o
+
+# Triple of serialized terms.
+ctypedef struct BufferTriple:
+    Buffer *s
+    Buffer *p
+    Buffer *o
+
+#cdef:
+#    int serialize(tuple trp, tpl.tpl_bin *data) except -1
+#    tuple deserialize(tpl.tpl_bin data)

lakesuperior/model/rdf/triple.pyx

@@ -0,0 +1,41 @@
+#from lakesuperior.store.ldp_rs cimport term
+#
+#cdef int serialize(tuple trp, tpl.tpl_bin *data) except -1:
+#    """
+#    Serialize a triple expressed as a tuple of RDFlib terms.
+#
+#    :param tuple trp: 3-tuple of RDFlib terms.
+#
+#    :rtype: Triple
+#    """
+#    cdef:
+#        Triple strp
+#        Term *s
+#        Term *p
+#        Term *o
+#
+#    strp.s = s
+#    strp.p = p
+#    strp.o = o
+#
+##    term.serialize(s)
+##    term.serialize(p)
+##    term.serialize(o)
+#
+#    return strp
+#
+#
+#cdef tuple deserialize(Triple strp):
+#    """
+#    Deserialize a ``Triple`` structure into a tuple of terms.
+#
+#    :rtype: tuple
+#    """
+#    pass
+##    s = term.deserialize(strp.s.addr, strp.s.sz)
+##    p = term.deserialize(strp.p.addr, strp.p.sz)
+##    o = term.deserialize(strp.o.addr, strp.o.sz)
+##
+##    return s, p, o
+#
+#

lakesuperior/model/structures/hash.pxd

@@ -0,0 +1,34 @@
+from libc.stdint cimport uint32_t, uint64_t
+
+from lakesuperior.model.base cimport Buffer
+
+
+# Seed for computing the term hash.
+#
+# This is a 16-byte string that will be split up into two ``uint64``
+# numbers to make up the ``spookyhash_128`` seeds.
+#
+# TODO This should be made configurable.
+DEF _TERM_HASH_SEED = \
+        b'\x72\x69\x76\x65\x72\x72\x75\x6e\x2c\x20\x70\x61\x73\x74\x20\x45'
+
+cdef enum:
+    HLEN_32 = sizeof(uint32_t)
+    HLEN_64 = sizeof(uint64_t)
+    HLEN_128 = sizeof(uint64_t) * 2
+
+ctypedef uint32_t Hash32
+ctypedef uint64_t Hash64
+ctypedef uint64_t DoubleHash64[2]
+ctypedef unsigned char Hash128[HLEN_128]
+
+cdef:
+    uint32_t term_hash_seed32
+    uint64_t term_hash_seed64_1, term_hash_seed64_2
+    unsigned char TERM_HASH_SEED[16]
+
+    int hash32(const Buffer *message, Hash32 *hash) except -1
+    int hash64(const Buffer *message, Hash64 *hash) except -1
+    int hash128(const Buffer *message, Hash128 *hash) except -1
+
+TERM_HASH_SEED = _TERM_HASH_SEED

lakesuperior/model/structures/hash.pyx

@@ -0,0 +1,53 @@
+from libc.stdint cimport uint32_t, uint64_t
+from libc.string cimport memcpy
+
+from lakesuperior.model.base cimport Buffer
+from lakesuperior.cy_include cimport spookyhash as sph
+
+
+memcpy(&term_hash_seed32, TERM_HASH_SEED, HLEN_32)
+memcpy(&term_hash_seed64_1, TERM_HASH_SEED, HLEN_64)
+memcpy(&term_hash_seed64_2, TERM_HASH_SEED + HLEN_64, HLEN_64)
+
+
+cdef inline int hash32(const Buffer *message, Hash32 *hash) except -1:
+    """
+    Get a 32-bit (unsigned int) hash value of a byte string.
+    """
+    cdef uint32_t seed = term_hash_seed64_1
+
+    hash[0] = sph.spookyhash_32(message[0].addr, message[0].sz, seed)
+
+
+cdef inline int hash64(const Buffer *message, Hash64 *hash) except -1:
+    """
+    Get a 64-bit (unsigned long) hash value of a byte string.
+    """
+    cdef uint64_t seed = term_hash_seed32
+
+    hash[0] = sph.spookyhash_64(message[0].addr, message[0].sz, seed)
+
+
+cdef inline int hash128(const Buffer *message, Hash128 *hash) except -1:
+    """
+    Get the hash value of a byte string with a defined size.
+
+    The hashing algorithm is `SpookyHash
+    <http://burtleburtle.net/bob/hash/spooky.html>`_ which produces 128-bit
+    (16-byte) digests.
+
+    Note that this returns a char array while the smaller functions return
+    numeric types (uint, ulong).
+
+    The initial seeds are determined in the application configuration.
+
+    :rtype: Hash128
+    """
+    cdef:
+        DoubleHash64 seed = [term_hash_seed64_1, term_hash_seed64_2]
+        Hash128 digest
+
+    sph.spookyhash_128(message[0].addr, message[0].sz, seed, seed + 1)
+
+    # This casts the 2 contiguous uint64_t's into a char[16] pointer.
+    hash[0] = <Hash128>seed

lakesuperior/model/structures/keyset.pxd

@@ -0,0 +1,37 @@
+from lakesuperior.model.base cimport (
+    Key, Key, DoubleKey, TripleKey, Buffer
+)
+
+ctypedef bint (*key_cmp_fn_t)(
+    const TripleKey* spok, const Key k1, const Key k2
+)
+
+cdef class Keyset:
+    cdef:
+        TripleKey* data
+        size_t capacity
+        size_t cur # Index cursor used to look up values.
+        size_t free_i # Index of next free slot.
+        float expand_ratio # By how much storage is automatically expanded when
+                           # full. 1 means the size doubles, 0.5 a 50%
+                           # increase. 0 means that storage won't be
+                           # automatically expanded and adding above capacity
+                           # will raise an error.
+
+        void seek(self, size_t idx=*)
+        size_t size(self)
+        size_t tell(self)
+        bint get_next(self, TripleKey* item)
+        void add(self, const TripleKey* val, bint check_dup=*) except *
+        void remove(self, const TripleKey* val) except *
+        bint contains(self, const TripleKey* val) nogil
+        Keyset copy(self)
+        Keyset sparse_copy(self)
+        void resize(self, size_t size=*) except *
+        Keyset lookup(self, const Key sk, const Key pk, const Key ok)
+
+cdef:
+    Keyset merge(Keyset ks1, Keyset ks2)
+    Keyset subtract(Keyset ks1, Keyset ks2)
+    Keyset intersect(Keyset ks1, Keyset ks2)
+    Keyset xor(Keyset ks1, Keyset ks2)

lakesuperior/model/structures/keyset.pyx

@@ -0,0 +1,364 @@
+import logging
+
+from libc.string cimport memcmp, memcpy
+from cpython.mem cimport PyMem_Malloc, PyMem_Realloc, PyMem_Free
+from cython.parallel import prange
+
+cimport lakesuperior.model.callbacks as cb
+
+from lakesuperior.model.base cimport NULL_TRP, TRP_KLEN, TripleKey
+
+
+logger = logging.getLogger(__name__)
+
+
+cdef class Keyset:
+    """
+    Pre-allocated set of ``TripleKey``s.
+
+    The set is not checked for duplicates all the time: e.g., when creating
+    from a single set of triples coming from the store, the duplicate check
+    is turned off for efficiency. When merging with other sets, duplicate
+    checking should be turned on.
+
+    Since this class is based on a contiguous block of memory, it is best to
+    do very little manipulation. Several operations involve copying the whole
+    data block, so e.g. bulk removal and intersection are much more efficient
+    than individual record operations.
+    """
+    def __cinit__(self, size_t capacity=0, expand_ratio=.5):
+        """
+        Initialize and allocate memory for the data set.
+
+        :param size_t capacity: Number of elements to be accounted for.
+        """
+        self.capacity = capacity
+        self.expand_ratio = expand_ratio
+        self.data = <TripleKey*>PyMem_Malloc(self.capacity * TRP_KLEN)
+        if capacity and not self.data:
+            raise MemoryError('Error allocating Keyset data.')
+
+        self.cur = 0
+        self.free_i = 0
+
+
+    def __dealloc__(self):
+        """
+        Free the memory.
+
+        This is called when the Python instance is garbage collected, which
+        makes it handy to safely pass a Keyset instance across functions.
+        """
+        PyMem_Free(self.data)
+
+
+    # Access methods.
+
+    cdef void seek(self, size_t idx=0):
+        """
+        Place the cursor at a certain index, 0 by default.
+        """
+        self.cur = idx
+
+
+    cdef size_t size(self):
+        """
+        Size of the object as the number of occupied data slots.
+
+        Note that this is different from :py:data:`capacity`_, which indicates
+        the number of allocated items in memory.
+        """
+        return self.free_i
+
+
+    cdef size_t tell(self):
+        """
+        Tell the position of the cursor in the keyset.
+        """
+        return self.cur
+
+
+    cdef inline bint get_next(self, TripleKey* val):
+        """
+        Get the current value and advance the cursor by 1.
+
+        :param void *val: Addres of value returned. It is NULL if
+            the end of the buffer was reached.
+
+        :rtype: bint
+        :return: True if a value was found, False if the end of the buffer
+            has been reached.
+        """
+        if self.cur >= self.free_i:
+            return False
+
+        val[0] = self.data[self.cur]
+        self.cur += 1
+
+        return True
+
+
+    cdef void add(self, const TripleKey* val, bint check_dup=False) except *:
+        """
+        Add a triple key to the array.
+        """
+        # Check for deleted triples and optionally duplicates.
+        if val[0] == NULL_TRP or (check_dup and self.contains(val)):
+            return
+
+        if self.free_i >= self.capacity:
+            if self.expand_ratio > 0:
+                # In some edge casees, a very small ratio may round down to a
+                # zero increase, so the baseline increase is 1 element.
+                self.resize(1 + <size_t>(self.capacity * (1 + self.expand_ratio)))
+            else:
+                raise MemoryError('No space left in key set.')
+
+        self.data[self.free_i] = val[0]
+
+        self.free_i += 1
+
+
+    cdef void remove(self, const TripleKey* val) except *:
+        """
+        Remove a triple key.
+
+        This method replaces a triple with NULL_TRP if found. It
+        does not reclaim space. Therefore, if many removal operations are
+        forseen, using :py:meth:`subtract`_ is advised.
+        """
+        cdef:
+            TripleKey stored_val
+
+        self.seek()
+        while self.get_next(&stored_val):
+            #logger.info(f'Looking up for removal: {stored_val}')
+            if memcmp(val, stored_val, TRP_KLEN) == 0:
+                memcpy(&stored_val, NULL_TRP, TRP_KLEN)
+                return
+
+
+    cdef bint contains(self, const TripleKey* val) nogil:
+        """
+        Whether a value exists in the set.
+        """
+        cdef size_t i
+
+        for i in range(self.free_i):
+            # o is least likely to match.
+            if (
+                val[0][2] == self.data[i][2] and
+                val[0][0] == self.data[i][0] and
+                val[0][1] == self.data[i][1]
+            ):
+                return True
+        return False
+
+
+    cdef Keyset copy(self):
+        """
+        Copy a Keyset.
+        """
+        cdef Keyset new_ks = Keyset(
+            self.capacity, expand_ratio=self.expand_ratio
+        )
+        memcpy(new_ks.data, self.data, self.capacity * TRP_KLEN)
+        new_ks.seek()
+        new_ks.free_i = self.free_i
+
+        return new_ks
+
+
+    cdef Keyset sparse_copy(self):
+        """
+        Copy a Keyset and plug holes.
+
+        ``NULL_TRP`` values left from removing triple keys are skipped in the
+        copy and the set is shrunk to its used size.
+        """
+        cdef:
+            TripleKey val
+            Keyset new_ks = Keyset(self.capacity, self.expand_ratio)
+
+        self.seek()
+        while self.get_next(&val):
+            if val != NULL_TRP:
+                new_ks.add(&val)
+
+        new_ks.resize()
+
+        return new_ks
+
+
+    cdef void resize(self, size_t size=0) except *:
+        """
+        Change the array capacity.
+
+        :param size_t size: The new capacity size. If not specified or 0, the
+            array is shrunk to the last used item. The resulting size
+            therefore will always be greater than 0. The only exception
+            to this is if the specified size is 0 and no items have been added
+            to the array, in which case the array will be effectively shrunk
+            to 0.
+        """
+        if not size:
+            size = self.free_i
+
+        tmp = <TripleKey*>PyMem_Realloc(self.data, size * TRP_KLEN)
+
+        if not tmp:
+            raise MemoryError('Could not reallocate Keyset data.')
+
+        self.data = tmp
+        self.capacity = size
+        self.seek()
+
+
+    cdef Keyset lookup(self, const Key sk, const Key pk, const Key ok):
+        """
+        Look up triple keys.
+
+        This works in a similar way that the ``Graph`` and ``LmdbStore``
+        methods work.
+
+        Any and all the terms may be NULL. A NULL term is treated as unbound.
+
+        :param const Key* sk: s key pointer.
+        :param const Key* pk: p key pointer.
+        :param const Key* ok: o key pointer.
+        """
+        cdef:
+            TripleKey spok
+            Keyset ret = Keyset(self.capacity)
+            Key k1, k2
+            key_cmp_fn_t cmp_fn
+
+        if sk and pk and ok: # s p o
+            pass # TODO
+
+        elif sk:
+            k1 = sk
+            if pk: # s p ?
+                k2 = pk
+                cmp_fn = cb.lookup_skpk_cmp_fn
+
+            elif ok: # s ? o
+                k2 = ok
+                cmp_fn = cb.lookup_skok_cmp_fn
+
+            else: # s ? ?
+                cmp_fn = cb.lookup_sk_cmp_fn
+
+        elif pk:
+            k1 = pk
+            if ok: # ? p o
+                k2 = ok
+                cmp_fn = cb.lookup_pkok_cmp_fn
+
+            else: # ? p ?
+                cmp_fn = cb.lookup_pk_cmp_fn
+
+        elif ok: # ? ? o
+            k1 = ok
+            cmp_fn = cb.lookup_ok_cmp_fn
+
+        else: # ? ? ?
+            return self.copy()
+
+        self.seek()
+        while self.get_next(&spok):
+            if cmp_fn(&spok, k1, k2):
+                ret.add(&spok)
+
+        ret.resize()
+
+        return ret
+
+
+
+## Boolean operations.
+
+cdef Keyset merge(Keyset ks1, Keyset ks2):
+    """
+    Create a Keyset by merging an``ks2`` Keyset with the current one.
+
+    :rtype: Keyset
+    """
+    cdef:
+        TripleKey val
+        Keyset ks3 = ks1.copy()
+
+    ks2.seek()
+    while ks2.get_next(&val):
+        ks3.add(&val, True)
+
+    ks3.resize()
+
+    return ks3
+
+
+cdef Keyset subtract(Keyset ks1, Keyset ks2):
+    """
+    Create a Keyset by subtracting an``ks2`` Keyset from the current one.
+
+    :rtype: Keyset
+    """
+    cdef:
+        TripleKey val
+        Keyset ks3 = Keyset(ks1.capacity)
+
+    ks1.seek()
+    while ks1.get_next(&val):
+        if val != NULL_TRP and not ks2.contains(&val):
+            ks3.add(&val)
+
+    ks3.resize()
+
+    return ks3
+
+
+cdef Keyset intersect(Keyset ks1, Keyset ks2):
+    """
+    Create a Keyset by intersection with an``ks2`` Keyset.
+
+    :rtype: Keyset
+    """
+    cdef:
+        TripleKey val
+        Keyset ks3 = Keyset(ks1.capacity)
+
+    ks1.seek()
+    while ks1.get_next(&val):
+        if val != NULL_TRP and ks2.contains(&val):
+            ks3.add(&val)
+
+    ks3.resize()
+
+    return ks3
+
+
+cdef Keyset xor(Keyset ks1, Keyset ks2):
+    """
+    Create a Keyset by disjunction (XOR) with an``ks2`` Keyset.
+
+    :rtype: Keyset
+    """
+    cdef:
+        TripleKey val
+        Keyset ks3 = Keyset(ks1.capacity + ks2.capacity)
+
+    ks1.seek()
+    while ks1.get_next(&val):
+        if val != NULL_TRP and not ks2.contains(&val):
+            ks3.add(&val)
+
+    ks2.seek()
+    while ks2.get_next(&val):
+        if val != NULL_TRP and not ks1.contains(&val):
+            ks3.add(&val)
+
+    ks3.resize()
+
+    return ks3
+
+

lakesuperior/store/base_lmdb_store.c

@@ -1,17469 +0,0 @@
-/* Generated by Cython 0.28.4 */
-
-/* BEGIN: Cython Metadata
-{
-    "distutils": {
-        "depends": [
-            "/home/scossu/code/lsup/src/ext/include/lmdb.h"
-        ],
-        "include_dirs": [
-            "/home/scossu/code/lsup/src/ext/include",
-            "/home/scossu/code/lsup/src/lakesuperior/cy_include"
-        ],
-        "name": "lakesuperior.store.base_lmdb_store",
-        "sources": [
-            "/home/scossu/code/lsup/src/lakesuperior/store/base_lmdb_store.pyx",
-            "/home/scossu/code/lsup/src/ext/lib/mdb.c",
-            "/home/scossu/code/lsup/src/ext/lib/midl.c"
-        ]
-    },
-    "module_name": "lakesuperior.store.base_lmdb_store"
-}
-END: Cython Metadata */
-
-#define PY_SSIZE_T_CLEAN
-#include "Python.h"
-#ifndef Py_PYTHON_H
-    #error Python headers needed to compile C extensions, please install development version of Python.
-#elif PY_VERSION_HEX < 0x02060000 || (0x03000000 <= PY_VERSION_HEX && PY_VERSION_HEX < 0x03030000)
-    #error Cython requires Python 2.6+ or Python 3.3+.
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-  #define CYTHON_USE_TYPE_SLOTS 0
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-  #define CYTHON_USE_PYTYPE_LOOKUP 0
-  #if PY_VERSION_HEX < 0x03050000
-    #undef CYTHON_USE_ASYNC_SLOTS
-    #define CYTHON_USE_ASYNC_SLOTS 0
-  #elif !defined(CYTHON_USE_ASYNC_SLOTS)
-    #define CYTHON_USE_ASYNC_SLOTS 1
-  #endif
-  #undef CYTHON_USE_PYLIST_INTERNALS
-  #define CYTHON_USE_PYLIST_INTERNALS 0
-  #undef CYTHON_USE_UNICODE_INTERNALS
-  #define CYTHON_USE_UNICODE_INTERNALS 0
-  #undef CYTHON_USE_UNICODE_WRITER
-  #define CYTHON_USE_UNICODE_WRITER 0
-  #undef CYTHON_USE_PYLONG_INTERNALS
-  #define CYTHON_USE_PYLONG_INTERNALS 0
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-  #define CYTHON_AVOID_BORROWED_REFS 1
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-  #define CYTHON_ASSUME_SAFE_MACROS 0
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-  #define CYTHON_UNPACK_METHODS 0
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-  #define CYTHON_FAST_THREAD_STATE 0
-  #undef CYTHON_FAST_PYCALL
-  #define CYTHON_FAST_PYCALL 0
-  #undef CYTHON_PEP489_MULTI_PHASE_INIT
-  #define CYTHON_PEP489_MULTI_PHASE_INIT 0
-  #undef CYTHON_USE_TP_FINALIZE
-  #define CYTHON_USE_TP_FINALIZE 0
-#elif defined(PYSTON_VERSION)
-  #define CYTHON_COMPILING_IN_PYPY 0
-  #define CYTHON_COMPILING_IN_PYSTON 1
-  #define CYTHON_COMPILING_IN_CPYTHON 0
-  #ifndef CYTHON_USE_TYPE_SLOTS
-    #define CYTHON_USE_TYPE_SLOTS 1
-  #endif
-  #undef CYTHON_USE_PYTYPE_LOOKUP
-  #define CYTHON_USE_PYTYPE_LOOKUP 0
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-  #define CYTHON_USE_ASYNC_SLOTS 0
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-  #define CYTHON_USE_PYLIST_INTERNALS 0
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-  #define CYTHON_PEP489_MULTI_PHASE_INIT 0
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-      #define CYTHON_FALLTHROUGH [[clang::fallthrough]]
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-      #define CYTHON_FALLTHROUGH [[gnu::fallthrough]]
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-#if CYTHON_COMPILING_IN_PYPY && PY_VERSION_HEX < 0x02070600 && !defined(Py_OptimizeFlag)
-  #define Py_OptimizeFlag 0
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-  #define __Pyx_PyCode_New(a, k, l, s, f, code, c, n, v, fv, cell, fn, name, fline, lnos)\
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-  #define __Pyx_PyCode_New(a, k, l, s, f, code, c, n, v, fv, cell, fn, name, fline, lnos)\
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-  #define __Pyx_DefaultClassType PyType_Type
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-#ifndef Py_TPFLAGS_CHECKTYPES
-  #define Py_TPFLAGS_CHECKTYPES 0
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-#ifndef Py_TPFLAGS_HAVE_INDEX
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-  #define Py_TPFLAGS_HAVE_NEWBUFFER 0
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-  #define Py_TPFLAGS_HAVE_FINALIZE 0
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-  typedef PyObject *(*__Pyx_PyCFunctionFastWithKeywords) (PyObject *self, PyObject *const *args,
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-  #define __Pyx_PyCFunctionFast _PyCFunctionFast
-  #define __Pyx_PyCFunctionFastWithKeywords _PyCFunctionFastWithKeywords
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-#define __Pyx_PyFastCFunction_Check(func)\
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-#else
-#define __Pyx_PyFastCFunction_Check(func) 0
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-  #define PyObject_Malloc(s)   PyMem_Malloc(s)
-  #define PyObject_Free(p)     PyMem_Free(p)
-  #define PyObject_Realloc(p)  PyMem_Realloc(p)
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-  #define __Pyx_PyCode_HasFreeVars(co)  PyCode_HasFreeVars(co)
-  #define __Pyx_PyFrame_SetLineNumber(frame, lineno) PyFrame_SetLineNumber(frame, lineno)
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-  #define __Pyx_PyFrame_SetLineNumber(frame, lineno)  (frame)->f_lineno = (lineno)
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-#if !CYTHON_FAST_THREAD_STATE || PY_VERSION_HEX < 0x02070000
-  #define __Pyx_PyThreadState_Current PyThreadState_GET()
-#elif PY_VERSION_HEX >= 0x03060000
-  #define __Pyx_PyThreadState_Current _PyThreadState_UncheckedGet()
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-static CYTHON_INLINE int PyThread_tss_create(Py_tss_t *key) {
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-static CYTHON_INLINE Py_tss_t * PyThread_tss_alloc(void) {
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-  PyObject_Free(key);
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-static CYTHON_INLINE int PyThread_tss_is_created(Py_tss_t *key) {
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-static CYTHON_INLINE void PyThread_tss_delete(Py_tss_t *key) {
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-static CYTHON_INLINE int PyThread_tss_set(Py_tss_t *key, void *value) {
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-static CYTHON_INLINE void * PyThread_tss_get(Py_tss_t *key) {
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-#endif // TSS (Thread Specific Storage) API
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-#define __Pyx_PyDict_NewPresized(n)  ((n <= 8) ? PyDict_New() : _PyDict_NewPresized(n))
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-#define __Pyx_PyDict_NewPresized(n)  PyDict_New()
-#endif
-#if PY_MAJOR_VERSION >= 3 || CYTHON_FUTURE_DIVISION
-  #define __Pyx_PyNumber_Divide(x,y)         PyNumber_TrueDivide(x,y)
-  #define __Pyx_PyNumber_InPlaceDivide(x,y)  PyNumber_InPlaceTrueDivide(x,y)
-#else
-  #define __Pyx_PyNumber_Divide(x,y)         PyNumber_Divide(x,y)
-  #define __Pyx_PyNumber_InPlaceDivide(x,y)  PyNumber_InPlaceDivide(x,y)
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-#if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x030500A1 && CYTHON_USE_UNICODE_INTERNALS
-#define __Pyx_PyDict_GetItemStr(dict, name)  _PyDict_GetItem_KnownHash(dict, name, ((PyASCIIObject *) name)->hash)
-#else
-#define __Pyx_PyDict_GetItemStr(dict, name)  PyDict_GetItem(dict, name)
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-#if PY_VERSION_HEX > 0x03030000 && defined(PyUnicode_KIND)
-  #define CYTHON_PEP393_ENABLED 1
-  #define __Pyx_PyUnicode_READY(op)       (likely(PyUnicode_IS_READY(op)) ?\
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-  #define __Pyx_PyUnicode_GET_LENGTH(u)   PyUnicode_GET_LENGTH(u)
-  #define __Pyx_PyUnicode_READ_CHAR(u, i) PyUnicode_READ_CHAR(u, i)
-  #define __Pyx_PyUnicode_MAX_CHAR_VALUE(u)   PyUnicode_MAX_CHAR_VALUE(u)
-  #define __Pyx_PyUnicode_KIND(u)         PyUnicode_KIND(u)
-  #define __Pyx_PyUnicode_DATA(u)         PyUnicode_DATA(u)
-  #define __Pyx_PyUnicode_READ(k, d, i)   PyUnicode_READ(k, d, i)
-  #define __Pyx_PyUnicode_WRITE(k, d, i, ch)  PyUnicode_WRITE(k, d, i, ch)
-  #define __Pyx_PyUnicode_IS_TRUE(u)      (0 != (likely(PyUnicode_IS_READY(u)) ? PyUnicode_GET_LENGTH(u) : PyUnicode_GET_SIZE(u)))
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-  #define CYTHON_PEP393_ENABLED 0
-  #define PyUnicode_1BYTE_KIND  1
-  #define PyUnicode_2BYTE_KIND  2
-  #define PyUnicode_4BYTE_KIND  4
-  #define __Pyx_PyUnicode_READY(op)       (0)
-  #define __Pyx_PyUnicode_GET_LENGTH(u)   PyUnicode_GET_SIZE(u)
-  #define __Pyx_PyUnicode_READ_CHAR(u, i) ((Py_UCS4)(PyUnicode_AS_UNICODE(u)[i]))
-  #define __Pyx_PyUnicode_MAX_CHAR_VALUE(u)   ((sizeof(Py_UNICODE) == 2) ? 65535 : 1114111)
-  #define __Pyx_PyUnicode_KIND(u)         (sizeof(Py_UNICODE))
-  #define __Pyx_PyUnicode_DATA(u)         ((void*)PyUnicode_AS_UNICODE(u))
-  #define __Pyx_PyUnicode_READ(k, d, i)   ((void)(k), (Py_UCS4)(((Py_UNICODE*)d)[i]))
-  #define __Pyx_PyUnicode_WRITE(k, d, i, ch)  (((void)(k)), ((Py_UNICODE*)d)[i] = ch)
-  #define __Pyx_PyUnicode_IS_TRUE(u)      (0 != PyUnicode_GET_SIZE(u))
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-#if CYTHON_COMPILING_IN_PYPY
-  #define __Pyx_PyUnicode_Concat(a, b)      PyNumber_Add(a, b)
-  #define __Pyx_PyUnicode_ConcatSafe(a, b)  PyNumber_Add(a, b)
-#else
-  #define __Pyx_PyUnicode_Concat(a, b)      PyUnicode_Concat(a, b)
-  #define __Pyx_PyUnicode_ConcatSafe(a, b)  ((unlikely((a) == Py_None) || unlikely((b) == Py_None)) ?\
-      PyNumber_Add(a, b) : __Pyx_PyUnicode_Concat(a, b))
-#endif
-#if CYTHON_COMPILING_IN_PYPY && !defined(PyUnicode_Contains)
-  #define PyUnicode_Contains(u, s)  PySequence_Contains(u, s)
-#endif
-#if CYTHON_COMPILING_IN_PYPY && !defined(PyByteArray_Check)
-  #define PyByteArray_Check(obj)  PyObject_TypeCheck(obj, &PyByteArray_Type)
-#endif
-#if CYTHON_COMPILING_IN_PYPY && !defined(PyObject_Format)
-  #define PyObject_Format(obj, fmt)  PyObject_CallMethod(obj, "__format__", "O", fmt)
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-#define __Pyx_PyString_FormatSafe(a, b)   ((unlikely((a) == Py_None)) ? PyNumber_Remainder(a, b) : __Pyx_PyString_Format(a, b))
-#define __Pyx_PyUnicode_FormatSafe(a, b)  ((unlikely((a) == Py_None)) ? PyNumber_Remainder(a, b) : PyUnicode_Format(a, b))
-#if PY_MAJOR_VERSION >= 3
-  #define __Pyx_PyString_Format(a, b)  PyUnicode_Format(a, b)
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-  #define __Pyx_PyString_Format(a, b)  PyString_Format(a, b)
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-#if PY_MAJOR_VERSION < 3 && !defined(PyObject_ASCII)
-  #define PyObject_ASCII(o)            PyObject_Repr(o)
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-#if PY_MAJOR_VERSION >= 3
-  #define PyBaseString_Type            PyUnicode_Type
-  #define PyStringObject               PyUnicodeObject
-  #define PyString_Type                PyUnicode_Type
-  #define PyString_Check               PyUnicode_Check
-  #define PyString_CheckExact          PyUnicode_CheckExact
-  #define PyObject_Unicode             PyObject_Str
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-#if PY_MAJOR_VERSION >= 3
-  #define __Pyx_PyBaseString_Check(obj) PyUnicode_Check(obj)
-  #define __Pyx_PyBaseString_CheckExact(obj) PyUnicode_CheckExact(obj)
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-  #define __Pyx_PyBaseString_Check(obj) (PyString_Check(obj) || PyUnicode_Check(obj))
-  #define __Pyx_PyBaseString_CheckExact(obj) (PyString_CheckExact(obj) || PyUnicode_CheckExact(obj))
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-#ifndef PySet_CheckExact
-  #define PySet_CheckExact(obj)        (Py_TYPE(obj) == &PySet_Type)
-#endif
-#if CYTHON_ASSUME_SAFE_MACROS
-  #define __Pyx_PySequence_SIZE(seq)  Py_SIZE(seq)
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-  #define __Pyx_PySequence_SIZE(seq)  PySequence_Size(seq)
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-#if PY_MAJOR_VERSION >= 3
-  #define PyIntObject                  PyLongObject
-  #define PyInt_Type                   PyLong_Type
-  #define PyInt_Check(op)              PyLong_Check(op)
-  #define PyInt_CheckExact(op)         PyLong_CheckExact(op)
-  #define PyInt_FromString             PyLong_FromString
-  #define PyInt_FromUnicode            PyLong_FromUnicode
-  #define PyInt_FromLong               PyLong_FromLong
-  #define PyInt_FromSize_t             PyLong_FromSize_t
-  #define PyInt_FromSsize_t            PyLong_FromSsize_t
-  #define PyInt_AsLong                 PyLong_AsLong
-  #define PyInt_AS_LONG                PyLong_AS_LONG
-  #define PyInt_AsSsize_t              PyLong_AsSsize_t
-  #define PyInt_AsUnsignedLongMask     PyLong_AsUnsignedLongMask
-  #define PyInt_AsUnsignedLongLongMask PyLong_AsUnsignedLongLongMask
-  #define PyNumber_Int                 PyNumber_Long
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-#if PY_MAJOR_VERSION >= 3
-  #define PyBoolObject                 PyLongObject
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-#if PY_MAJOR_VERSION >= 3 && CYTHON_COMPILING_IN_PYPY
-  #ifndef PyUnicode_InternFromString
-    #define PyUnicode_InternFromString(s) PyUnicode_FromString(s)
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-  typedef long Py_hash_t;
-  #define __Pyx_PyInt_FromHash_t PyInt_FromLong
-  #define __Pyx_PyInt_AsHash_t   PyInt_AsLong
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-  #define __Pyx_PyInt_FromHash_t PyInt_FromSsize_t
-  #define __Pyx_PyInt_AsHash_t   PyInt_AsSsize_t
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-  #define __Pyx_PyMethod_New(func, self, klass) ((self) ? PyMethod_New(func, self) : (Py_INCREF(func), func))
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-  #define __Pyx_PyMethod_New(func, self, klass) PyMethod_New(func, self, klass)
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-#if CYTHON_USE_ASYNC_SLOTS
-  #if PY_VERSION_HEX >= 0x030500B1
-    #define __Pyx_PyAsyncMethodsStruct PyAsyncMethods
-    #define __Pyx_PyType_AsAsync(obj) (Py_TYPE(obj)->tp_as_async)
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-    #define __Pyx_PyType_AsAsync(obj) ((__Pyx_PyAsyncMethodsStruct*) (Py_TYPE(obj)->tp_reserved))
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-  #define __Pyx_PyType_AsAsync(obj) NULL
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-#ifndef __Pyx_PyAsyncMethodsStruct
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-#define __PYX_NAN() ((float) NAN)
-#else
-static CYTHON_INLINE float __PYX_NAN() {
-  float value;
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-#endif
-#if defined(__CYGWIN__) && defined(_LDBL_EQ_DBL)
-#define __Pyx_truncl trunc
-#else
-#define __Pyx_truncl truncl
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-
-
-#define __PYX_ERR(f_index, lineno, Ln_error) \
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-
-#ifndef __PYX_EXTERN_C
-  #ifdef __cplusplus
-    #define __PYX_EXTERN_C extern "C"
-  #else
-    #define __PYX_EXTERN_C extern
-  #endif
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-#define __PYX_HAVE__lakesuperior__store__base_lmdb_store
-#define __PYX_HAVE_API__lakesuperior__store__base_lmdb_store
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-#include <sys/types.h>
-#include "lmdb.h"
-#include <errno.h>
-#ifdef _OPENMP
-#include <omp.h>
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-
-#if defined(PYREX_WITHOUT_ASSERTIONS) && !defined(CYTHON_WITHOUT_ASSERTIONS)
-#define CYTHON_WITHOUT_ASSERTIONS
-#endif
-
-typedef struct {PyObject **p; const char *s; const Py_ssize_t n; const char* encoding;
-                const char is_unicode; const char is_str; const char intern; } __Pyx_StringTabEntry;
-
-#define __PYX_DEFAULT_STRING_ENCODING_IS_ASCII 0
-#define __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT 0
-#define __PYX_DEFAULT_STRING_ENCODING ""
-#define __Pyx_PyObject_FromString __Pyx_PyBytes_FromString
-#define __Pyx_PyObject_FromStringAndSize __Pyx_PyBytes_FromStringAndSize
-#define __Pyx_uchar_cast(c) ((unsigned char)c)
-#define __Pyx_long_cast(x) ((long)x)
-#define __Pyx_fits_Py_ssize_t(v, type, is_signed)  (\
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-    (sizeof(type) > sizeof(Py_ssize_t) &&\
-          likely(v < (type)PY_SSIZE_T_MAX ||\
-                 v == (type)PY_SSIZE_T_MAX)  &&\
-          (!is_signed || likely(v > (type)PY_SSIZE_T_MIN ||\
-                                v == (type)PY_SSIZE_T_MIN)))  ||\
-    (sizeof(type) == sizeof(Py_ssize_t) &&\
-          (is_signed || likely(v < (type)PY_SSIZE_T_MAX ||\
-                               v == (type)PY_SSIZE_T_MAX)))  )
-#if defined (__cplusplus) && __cplusplus >= 201103L
-    #include <cstdlib>
-    #define __Pyx_sst_abs(value) std::abs(value)
-#elif SIZEOF_INT >= SIZEOF_SIZE_T
-    #define __Pyx_sst_abs(value) abs(value)
-#elif SIZEOF_LONG >= SIZEOF_SIZE_T
-    #define __Pyx_sst_abs(value) labs(value)
-#elif defined (_MSC_VER)
-    #define __Pyx_sst_abs(value) ((Py_ssize_t)_abs64(value))
-#elif defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
-    #define __Pyx_sst_abs(value) llabs(value)
-#elif defined (__GNUC__)
-    #define __Pyx_sst_abs(value) __builtin_llabs(value)
-#else
-    #define __Pyx_sst_abs(value) ((value<0) ? -value : value)
-#endif
-static CYTHON_INLINE const char* __Pyx_PyObject_AsString(PyObject*);
-static CYTHON_INLINE const char* __Pyx_PyObject_AsStringAndSize(PyObject*, Py_ssize_t* length);
-#define __Pyx_PyByteArray_FromString(s) PyByteArray_FromStringAndSize((const char*)s, strlen((const char*)s))
-#define __Pyx_PyByteArray_FromStringAndSize(s, l) PyByteArray_FromStringAndSize((const char*)s, l)
-#define __Pyx_PyBytes_FromString        PyBytes_FromString
-#define __Pyx_PyBytes_FromStringAndSize PyBytes_FromStringAndSize
-static CYTHON_INLINE PyObject* __Pyx_PyUnicode_FromString(const char*);
-#if PY_MAJOR_VERSION < 3
-    #define __Pyx_PyStr_FromString        __Pyx_PyBytes_FromString
-    #define __Pyx_PyStr_FromStringAndSize __Pyx_PyBytes_FromStringAndSize
-#else
-    #define __Pyx_PyStr_FromString        __Pyx_PyUnicode_FromString
-    #define __Pyx_PyStr_FromStringAndSize __Pyx_PyUnicode_FromStringAndSize
-#endif
-#define __Pyx_PyBytes_AsWritableString(s)     ((char*) PyBytes_AS_STRING(s))
-#define __Pyx_PyBytes_AsWritableSString(s)    ((signed char*) PyBytes_AS_STRING(s))
-#define __Pyx_PyBytes_AsWritableUString(s)    ((unsigned char*) PyBytes_AS_STRING(s))
-#define __Pyx_PyBytes_AsString(s)     ((const char*) PyBytes_AS_STRING(s))
-#define __Pyx_PyBytes_AsSString(s)    ((const signed char*) PyBytes_AS_STRING(s))
-#define __Pyx_PyBytes_AsUString(s)    ((const unsigned char*) PyBytes_AS_STRING(s))
-#define __Pyx_PyObject_AsWritableString(s)    ((char*) __Pyx_PyObject_AsString(s))
-#define __Pyx_PyObject_AsWritableSString(s)    ((signed char*) __Pyx_PyObject_AsString(s))
-#define __Pyx_PyObject_AsWritableUString(s)    ((unsigned char*) __Pyx_PyObject_AsString(s))
-#define __Pyx_PyObject_AsSString(s)    ((const signed char*) __Pyx_PyObject_AsString(s))
-#define __Pyx_PyObject_AsUString(s)    ((const unsigned char*) __Pyx_PyObject_AsString(s))
-#define __Pyx_PyObject_FromCString(s)  __Pyx_PyObject_FromString((const char*)s)
-#define __Pyx_PyBytes_FromCString(s)   __Pyx_PyBytes_FromString((const char*)s)
-#define __Pyx_PyByteArray_FromCString(s)   __Pyx_PyByteArray_FromString((const char*)s)
-#define __Pyx_PyStr_FromCString(s)     __Pyx_PyStr_FromString((const char*)s)
-#define __Pyx_PyUnicode_FromCString(s) __Pyx_PyUnicode_FromString((const char*)s)
-static CYTHON_INLINE size_t __Pyx_Py_UNICODE_strlen(const Py_UNICODE *u) {
-    const Py_UNICODE *u_end = u;
-    while (*u_end++) ;
-    return (size_t)(u_end - u - 1);
-}
-#define __Pyx_PyUnicode_FromUnicode(u)       PyUnicode_FromUnicode(u, __Pyx_Py_UNICODE_strlen(u))
-#define __Pyx_PyUnicode_FromUnicodeAndLength PyUnicode_FromUnicode
-#define __Pyx_PyUnicode_AsUnicode            PyUnicode_AsUnicode
-#define __Pyx_NewRef(obj) (Py_INCREF(obj), obj)
-#define __Pyx_Owned_Py_None(b) __Pyx_NewRef(Py_None)
-static CYTHON_INLINE PyObject * __Pyx_PyBool_FromLong(long b);
-static CYTHON_INLINE int __Pyx_PyObject_IsTrue(PyObject*);
-static CYTHON_INLINE PyObject* __Pyx_PyNumber_IntOrLong(PyObject* x);
-#define __Pyx_PySequence_Tuple(obj)\
-    (likely(PyTuple_CheckExact(obj)) ? __Pyx_NewRef(obj) : PySequence_Tuple(obj))
-static CYTHON_INLINE Py_ssize_t __Pyx_PyIndex_AsSsize_t(PyObject*);
-static CYTHON_INLINE PyObject * __Pyx_PyInt_FromSize_t(size_t);
-#if CYTHON_ASSUME_SAFE_MACROS
-#define __pyx_PyFloat_AsDouble(x) (PyFloat_CheckExact(x) ? PyFloat_AS_DOUBLE(x) : PyFloat_AsDouble(x))
-#else
-#define __pyx_PyFloat_AsDouble(x) PyFloat_AsDouble(x)
-#endif
-#define __pyx_PyFloat_AsFloat(x) ((float) __pyx_PyFloat_AsDouble(x))
-#if PY_MAJOR_VERSION >= 3
-#define __Pyx_PyNumber_Int(x) (PyLong_CheckExact(x) ? __Pyx_NewRef(x) : PyNumber_Long(x))
-#else
-#define __Pyx_PyNumber_Int(x) (PyInt_CheckExact(x) ? __Pyx_NewRef(x) : PyNumber_Int(x))
-#endif
-#define __Pyx_PyNumber_Float(x) (PyFloat_CheckExact(x) ? __Pyx_NewRef(x) : PyNumber_Float(x))
-#if PY_MAJOR_VERSION < 3 && __PYX_DEFAULT_STRING_ENCODING_IS_ASCII
-static int __Pyx_sys_getdefaultencoding_not_ascii;
-static int __Pyx_init_sys_getdefaultencoding_params(void) {
-    PyObject* sys;
-    PyObject* default_encoding = NULL;
-    PyObject* ascii_chars_u = NULL;
-    PyObject* ascii_chars_b = NULL;
-    const char* default_encoding_c;
-    sys = PyImport_ImportModule("sys");
-    if (!sys) goto bad;
-    default_encoding = PyObject_CallMethod(sys, (char*) "getdefaultencoding", NULL);
-    Py_DECREF(sys);
-    if (!default_encoding) goto bad;
-    default_encoding_c = PyBytes_AsString(default_encoding);
-    if (!default_encoding_c) goto bad;
-    if (strcmp(default_encoding_c, "ascii") == 0) {
-        __Pyx_sys_getdefaultencoding_not_ascii = 0;
-    } else {
-        char ascii_chars[128];
-        int c;
-        for (c = 0; c < 128; c++) {
-            ascii_chars[c] = c;
-        }
-        __Pyx_sys_getdefaultencoding_not_ascii = 1;
-        ascii_chars_u = PyUnicode_DecodeASCII(ascii_chars, 128, NULL);
-        if (!ascii_chars_u) goto bad;
-        ascii_chars_b = PyUnicode_AsEncodedString(ascii_chars_u, default_encoding_c, NULL);
-        if (!ascii_chars_b || !PyBytes_Check(ascii_chars_b) || memcmp(ascii_chars, PyBytes_AS_STRING(ascii_chars_b), 128) != 0) {
-            PyErr_Format(
-                PyExc_ValueError,
-                "This module compiled with c_string_encoding=ascii, but default encoding '%.200s' is not a superset of ascii.",
-                default_encoding_c);
-            goto bad;
-        }
-        Py_DECREF(ascii_chars_u);
-        Py_DECREF(ascii_chars_b);
-    }
-    Py_DECREF(default_encoding);
-    return 0;
-bad:
-    Py_XDECREF(default_encoding);
-    Py_XDECREF(ascii_chars_u);
-    Py_XDECREF(ascii_chars_b);
-    return -1;
-}
-#endif
-#if __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT && PY_MAJOR_VERSION >= 3
-#define __Pyx_PyUnicode_FromStringAndSize(c_str, size) PyUnicode_DecodeUTF8(c_str, size, NULL)
-#else
-#define __Pyx_PyUnicode_FromStringAndSize(c_str, size) PyUnicode_Decode(c_str, size, __PYX_DEFAULT_STRING_ENCODING, NULL)
-#if __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT
-static char* __PYX_DEFAULT_STRING_ENCODING;
-static int __Pyx_init_sys_getdefaultencoding_params(void) {
-    PyObject* sys;
-    PyObject* default_encoding = NULL;
-    char* default_encoding_c;
-    sys = PyImport_ImportModule("sys");
-    if (!sys) goto bad;
-    default_encoding = PyObject_CallMethod(sys, (char*) (const char*) "getdefaultencoding", NULL);
-    Py_DECREF(sys);
-    if (!default_encoding) goto bad;
-    default_encoding_c = PyBytes_AsString(default_encoding);
-    if (!default_encoding_c) goto bad;
-    __PYX_DEFAULT_STRING_ENCODING = (char*) malloc(strlen(default_encoding_c));
-    if (!__PYX_DEFAULT_STRING_ENCODING) goto bad;
-    strcpy(__PYX_DEFAULT_STRING_ENCODING, default_encoding_c);
-    Py_DECREF(default_encoding);
-    return 0;
-bad:
-    Py_XDECREF(default_encoding);
-    return -1;
-}
-#endif
-#endif
-
-
-/* Test for GCC > 2.95 */
-#if defined(__GNUC__)     && (__GNUC__ > 2 || (__GNUC__ == 2 && (__GNUC_MINOR__ > 95)))
-  #define likely(x)   __builtin_expect(!!(x), 1)
-  #define unlikely(x) __builtin_expect(!!(x), 0)
-#else /* !__GNUC__ or GCC < 2.95 */
-  #define likely(x)   (x)
-  #define unlikely(x) (x)
-#endif /* __GNUC__ */
-static CYTHON_INLINE void __Pyx_pretend_to_initialize(void* ptr) { (void)ptr; }
-
-static PyObject *__pyx_m = NULL;
-static PyObject *__pyx_d;
-static PyObject *__pyx_b;
-static PyObject *__pyx_cython_runtime = NULL;
-static PyObject *__pyx_empty_tuple;
-static PyObject *__pyx_empty_bytes;
-static PyObject *__pyx_empty_unicode;
-static int __pyx_lineno;
-static int __pyx_clineno = 0;
-static const char * __pyx_cfilenm= __FILE__;
-static const char *__pyx_filename;
-
-
-static const char *__pyx_f[] = {
-  "lakesuperior/store/base_lmdb_store.pyx",
-  "stringsource",
-  "lakesuperior/store/base_lmdb_store.pxd",
-};
-
-/*--- Type declarations ---*/
-struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore;
-struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store___pyx_scope_struct__txn_ctx;
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store__check;
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__init_dbis;
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__txn_begin;
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__key_exists;
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__cur_open;
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_get_dbi;
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__put;
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__get_data;
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__delete;
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_close_env;
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_destroy;
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_get_data;
-
-/* "lakesuperior/store/base_lmdb_store.pxd":10
- *     lmdb.MDB_dbi dbi
- * 
- *     void _check(int rc, str message=*) except *             # <<<<<<<<<<<<<<
- * 
- * 
- */
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store__check {
-  int __pyx_n;
-  PyObject *message;
-};
-
-/* "lakesuperior/store/base_lmdb_store.pxd":26
- *         void _clear_stale_readers(self) except *
- *         void _cur_close(self, lmdb.MDB_cursor *cur) except *
- *         void _init_dbis(self, create=*) except *             # <<<<<<<<<<<<<<
- *         void _txn_begin(self, write=*, lmdb.MDB_txn *parent=*) except *
- *         void _txn_commit(self) except *
- */
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__init_dbis {
-  int __pyx_n;
-  PyObject *create;
-};
-
-/* "lakesuperior/store/base_lmdb_store.pxd":27
- *         void _cur_close(self, lmdb.MDB_cursor *cur) except *
- *         void _init_dbis(self, create=*) except *
- *         void _txn_begin(self, write=*, lmdb.MDB_txn *parent=*) except *             # <<<<<<<<<<<<<<
- *         void _txn_commit(self) except *
- *         void _txn_abort(self) except *
- */
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__txn_begin {
-  int __pyx_n;
-  PyObject *write;
-  MDB_txn *parent;
-};
-
-/* "lakesuperior/store/base_lmdb_store.pxd":30
- *         void _txn_commit(self) except *
- *         void _txn_abort(self) except *
- *         inline bint _key_exists(             # <<<<<<<<<<<<<<
- *             self, unsigned char *key, unsigned char klen,
- *             unsigned char *dblabel=*) except -1
- */
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__key_exists {
-  int __pyx_n;
-  unsigned char *dblabel;
-};
-
-/* "lakesuperior/store/base_lmdb_store.pxd":35
- * 
- *         size_t _txn_id(self) except -1
- *         lmdb.MDB_cursor *_cur_open(             # <<<<<<<<<<<<<<
- *                 self, unsigned char *dblabel=*, lmdb.MDB_txn *txn=*) except *
- * 
- */
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__cur_open {
-  int __pyx_n;
-  unsigned char *dblabel;
-  MDB_txn *txn;
-};
-
-/* "lakesuperior/store/base_lmdb_store.pxd":38
- *                 self, unsigned char *dblabel=*, lmdb.MDB_txn *txn=*) except *
- * 
- *         lmdb.MDB_dbi get_dbi(             # <<<<<<<<<<<<<<
- *                 self, unsigned char *dblabel=*, lmdb.MDB_txn *txn=*)
- * 
- */
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_get_dbi {
-  int __pyx_n;
-  unsigned char *dblabel;
-  MDB_txn *txn;
-};
-
-/* "lakesuperior/store/base_lmdb_store.pxd":41
- *                 self, unsigned char *dblabel=*, lmdb.MDB_txn *txn=*)
- * 
- *         void _put(             # <<<<<<<<<<<<<<
- *                 self, unsigned char *key, size_t key_size, unsigned char *data,
- *                 size_t data_size, unsigned char *dblabel=*,
- */
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__put {
-  int __pyx_n;
-  unsigned char *dblabel;
-  MDB_txn *txn;
-  unsigned int flags;
-};
-
-/* "lakesuperior/store/base_lmdb_store.pxd":46
- *                 lmdb.MDB_txn *txn=*, unsigned int flags=*) except *
- * 
- *         void _get_data(             # <<<<<<<<<<<<<<
- *                 self, unsigned char *key, size_t klen, lmdb.MDB_val *rv,
- *                 unsigned char *dblabel=*) except *
- */
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__get_data {
-  int __pyx_n;
-  unsigned char *dblabel;
-};
-
-/* "lakesuperior/store/base_lmdb_store.pxd":50
- *                 unsigned char *dblabel=*) except *
- * 
- *         void _delete(             # <<<<<<<<<<<<<<
- *                 self, unsigned char *key, size_t klen,
- *                 unsigned char *dblabel=*) except *
- */
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__delete {
-  int __pyx_n;
-  unsigned char *dblabel;
-};
-
-/* "lakesuperior/store/base_lmdb_store.pxd":57
- *         #int _reader_list_callback(self, const unsigned char *msg, void *str_)
- * 
- *     cpdef void close_env(self, bint commit_pending_transaction=*) except *             # <<<<<<<<<<<<<<
- *     cpdef void destroy(self, _path=*) except *
- *     #cpdef get_dup_data(self, unsigned char *key, db=*)
- */
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_close_env {
-  int __pyx_n;
-  int commit_pending_transaction;
-};
-
-/* "lakesuperior/store/base_lmdb_store.pxd":58
- * 
- *     cpdef void close_env(self, bint commit_pending_transaction=*) except *
- *     cpdef void destroy(self, _path=*) except *             # <<<<<<<<<<<<<<
- *     #cpdef get_dup_data(self, unsigned char *key, db=*)
- *     #cpdef get_all_pairs(self, db=*)
- */
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_destroy {
-  int __pyx_n;
-  PyObject *_path;
-};
-
-/* "lakesuperior/store/base_lmdb_store.pxd":61
- *     #cpdef get_dup_data(self, unsigned char *key, db=*)
- *     #cpdef get_all_pairs(self, db=*)
- *     cpdef bytes get_data(self, key, dblabel=*)             # <<<<<<<<<<<<<<
- *     cpdef dict stats(self)
- *     cpdef int txn_id(self)
- */
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_get_data {
-  int __pyx_n;
-  PyObject *dblabel;
-};
-
-/* "lakesuperior/store/base_lmdb_store.pxd":13
- * 
- * 
- * cdef class BaseLmdbStore:             # <<<<<<<<<<<<<<
- *     cdef:
- *         readonly bint is_txn_open
- */
-struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore {
-  PyObject_HEAD
-  struct __pyx_vtabstruct_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_vtab;
-  int is_txn_open;
-  int _open;
-  unsigned int _readers;
-  PyObject *env_path;
-  MDB_dbi *dbis;
-  MDB_env *dbenv;
-  MDB_txn *txn;
-  MDB_cursor **curs;
-};
-
-
-/* "lakesuperior/store/base_lmdb_store.pyx":334
- * 
- *     @contextmanager
- *     def txn_ctx(self, write=False):             # <<<<<<<<<<<<<<
- *         """
- *         Transaction context manager.
- */
-struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store___pyx_scope_struct__txn_ctx {
-  PyObject_HEAD
-  struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self;
-  PyObject *__pyx_v_write;
-  PyObject *__pyx_t_0;
-  PyObject *__pyx_t_1;
-  PyObject *__pyx_t_2;
-};
-
-
-
-/* "lakesuperior/store/base_lmdb_store.pyx":49
- * 
- * 
- * cdef class BaseLmdbStore:             # <<<<<<<<<<<<<<
- *     """
- *     Generic LMDB store abstract class.
- */
-
-struct __pyx_vtabstruct_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore {
-  void (*_clear_stale_readers)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *);
-  void (*_cur_close)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *, MDB_cursor *);
-  void (*_init_dbis)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__init_dbis *__pyx_optional_args);
-  void (*_txn_begin)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__txn_begin *__pyx_optional_args);
-  void (*_txn_commit)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *);
-  void (*_txn_abort)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *);
-  int (*_key_exists)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *, unsigned char *, unsigned char, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__key_exists *__pyx_optional_args);
-  size_t (*_txn_id)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *);
-  MDB_cursor *(*_cur_open)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__cur_open *__pyx_optional_args);
-  MDB_dbi (*get_dbi)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_get_dbi *__pyx_optional_args);
-  void (*_put)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *, unsigned char *, size_t, unsigned char *, size_t, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__put *__pyx_optional_args);
-  void (*_get_data)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *, unsigned char *, size_t, struct MDB_val *, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__get_data *__pyx_optional_args);
-  void (*_delete)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *, unsigned char *, size_t, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__delete *__pyx_optional_args);
-  PyObject *(*_stats)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *);
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-  #define __Pyx_GIVEREF(r)
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-  #define __Pyx_XDECREF(r) Py_XDECREF(r)
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-#define __Pyx_PyErr_Clear() __Pyx_ErrRestore(NULL, NULL, NULL)
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-#define __Pyx_ErrFetchWithState(type, value, tb)    __Pyx_ErrFetchInState(PyThreadState_GET(), type, value, tb)
-#define __Pyx_ErrRestore(type, value, tb)  __Pyx_ErrRestoreInState(__pyx_tstate, type, value, tb)
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-#define __Pyx_PyErr_Clear() PyErr_Clear()
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-#define __Pyx_ErrFetchWithState(type, value, tb)  PyErr_Fetch(type, value, tb)
-#define __Pyx_ErrRestoreInState(tstate, type, value, tb)  PyErr_Restore(type, value, tb)
-#define __Pyx_ErrFetchInState(tstate, type, value, tb)  PyErr_Fetch(type, value, tb)
-#define __Pyx_ErrRestore(type, value, tb)  PyErr_Restore(type, value, tb)
-#define __Pyx_ErrFetch(type, value, tb)  PyErr_Fetch(type, value, tb)
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-/* Profile.proto */
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-#if CYTHON_COMPILING_IN_PYPY || CYTHON_COMPILING_IN_PYSTON
-  #define CYTHON_PROFILE 0
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-  #define CYTHON_PROFILE 1
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-  #define CYTHON_TRACE_NOGIL 0
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-  #if CYTHON_TRACE_NOGIL && !defined(CYTHON_TRACE)
-    #define CYTHON_TRACE 1
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-#ifndef CYTHON_TRACE
-  #define CYTHON_TRACE 0
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-  #undef CYTHON_PROFILE_REUSE_FRAME
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-  #define CYTHON_PROFILE_REUSE_FRAME 0
-#endif
-#if CYTHON_PROFILE || CYTHON_TRACE
-  #include "compile.h"
-  #include "frameobject.h"
-  #include "traceback.h"
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-    #define CYTHON_FRAME_MODIFIER static
-    #define CYTHON_FRAME_DEL(frame)
-  #else
-    #define CYTHON_FRAME_MODIFIER
-    #define CYTHON_FRAME_DEL(frame) Py_CLEAR(frame)
-  #endif
-  #define __Pyx_TraceDeclarations\
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-  #define __Pyx_TraceCall(funcname, srcfile, firstlineno, nogil, goto_error)\
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-          PyGILState_Release(state);\
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-          if (unlikely(__Pyx_use_tracing < 0)) goto_error;\
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-  #endif
-  #define __Pyx_TraceException()\
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-      PyThreadState* tstate = __Pyx_PyThreadState_Current;\
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-          tstate->tracing++;\
-          tstate->use_tracing = 0;\
-          PyObject *exc_info = __Pyx_GetExceptionTuple(tstate);\
-          if (exc_info) {\
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-              tstate->c_profilefunc(\
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-              Py_DECREF(exc_info);\
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-  static void __Pyx_call_return_trace_func(PyThreadState *tstate, PyFrameObject *frame, PyObject *result) {
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-      __Pyx_ErrFetchInState(tstate, &type, &value, &traceback);
-      tstate->tracing++;
-      tstate->use_tracing = 0;
-      if (CYTHON_TRACE && tstate->c_tracefunc)
-          tstate->c_tracefunc(tstate->c_traceobj, frame, PyTrace_RETURN, result);
-      if (tstate->c_profilefunc)
-          tstate->c_profilefunc(tstate->c_profileobj, frame, PyTrace_RETURN, result);
-      CYTHON_FRAME_DEL(frame);
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-      tstate->tracing--;
-      __Pyx_ErrRestoreInState(tstate, type, value, traceback);
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-  #ifdef WITH_THREAD
-  #define __Pyx_TraceReturn(result, nogil)\
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-              tstate = __Pyx_PyThreadState_Current;\
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-              PyGILState_Release(state);\
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-  #else
-  #define __Pyx_TraceReturn(result, nogil)\
-  if (likely(!__Pyx_use_tracing)); else {\
-      PyThreadState* tstate = __Pyx_PyThreadState_Current;\
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-  #endif
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-  static int __Pyx_TraceSetupAndCall(PyCodeObject** code, PyFrameObject** frame, PyThreadState* tstate, const char *funcname, const char *srcfile, int firstlineno);
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-  #define __Pyx_TraceDeclarations
-  #define __Pyx_TraceFrameInit(codeobj)
-  #define __Pyx_TraceCall(funcname, srcfile, firstlineno, nogil, goto_error)   if ((1)); else goto_error;
-  #define __Pyx_TraceException()
-  #define __Pyx_TraceReturn(result, nogil)
-#endif
-#if CYTHON_TRACE
-  static int __Pyx_call_line_trace_func(PyThreadState *tstate, PyFrameObject *frame, int lineno) {
-      int ret;
-      PyObject *type, *value, *traceback;
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-      __Pyx_PyFrame_SetLineNumber(frame, lineno);
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-  #define __Pyx_TraceLine(lineno, nogil, goto_error)\
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-                  ret = __Pyx_call_line_trace_func(tstate, __pyx_frame, lineno);\
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-  #define __Pyx_TraceLine(lineno, nogil, goto_error)\
-  if (likely(!__Pyx_use_tracing)); else {\
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-      if (unlikely(tstate->use_tracing && tstate->c_tracefunc && __pyx_frame->f_trace)) {\
-          int ret = __Pyx_call_line_trace_func(tstate, __pyx_frame, lineno);\
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-  #define __Pyx_TraceLine(lineno, nogil, goto_error)   if ((1)); else goto_error;
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-static CYTHON_INLINE PyObject *__Pyx_GetModuleGlobalName(PyObject *name);
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-/* PyCFunctionFastCall.proto */
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-static CYTHON_INLINE PyObject *__Pyx_PyCFunction_FastCall(PyObject *func, PyObject **args, Py_ssize_t nargs);
-#else
-#define __Pyx_PyCFunction_FastCall(func, args, nargs)  (assert(0), NULL)
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-
-/* PyFunctionFastCall.proto */
-#if CYTHON_FAST_PYCALL
-#define __Pyx_PyFunction_FastCall(func, args, nargs)\
-    __Pyx_PyFunction_FastCallDict((func), (args), (nargs), NULL)
-#if 1 || PY_VERSION_HEX < 0x030600B1
-static PyObject *__Pyx_PyFunction_FastCallDict(PyObject *func, PyObject **args, int nargs, PyObject *kwargs);
-#else
-#define __Pyx_PyFunction_FastCallDict(func, args, nargs, kwargs) _PyFunction_FastCallDict(func, args, nargs, kwargs)
-#endif
-#endif
-
-/* PyObjectCall.proto */
-#if CYTHON_COMPILING_IN_CPYTHON
-static CYTHON_INLINE PyObject* __Pyx_PyObject_Call(PyObject *func, PyObject *arg, PyObject *kw);
-#else
-#define __Pyx_PyObject_Call(func, arg, kw) PyObject_Call(func, arg, kw)
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-/* PyObjectCallMethO.proto */
-#if CYTHON_COMPILING_IN_CPYTHON
-static CYTHON_INLINE PyObject* __Pyx_PyObject_CallMethO(PyObject *func, PyObject *arg);
-#endif
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-/* PyObjectCallOneArg.proto */
-static CYTHON_INLINE PyObject* __Pyx_PyObject_CallOneArg(PyObject *func, PyObject *arg);
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-/* PyObjectCallNoArg.proto */
-#if CYTHON_COMPILING_IN_CPYTHON
-static CYTHON_INLINE PyObject* __Pyx_PyObject_CallNoArg(PyObject *func);
-#else
-#define __Pyx_PyObject_CallNoArg(func) __Pyx_PyObject_Call(func, __pyx_empty_tuple, NULL)
-#endif
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-/* RaiseException.proto */
-static void __Pyx_Raise(PyObject *type, PyObject *value, PyObject *tb, PyObject *cause);
-
-/* IncludeStringH.proto */
-#include <string.h>
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-/* decode_c_string_utf16.proto */
-static CYTHON_INLINE PyObject *__Pyx_PyUnicode_DecodeUTF16(const char *s, Py_ssize_t size, const char *errors) {
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-    return PyUnicode_DecodeUTF16(s, size, errors, &byteorder);
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-static CYTHON_INLINE PyObject *__Pyx_PyUnicode_DecodeUTF16LE(const char *s, Py_ssize_t size, const char *errors) {
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-static CYTHON_INLINE PyObject *__Pyx_PyUnicode_DecodeUTF16BE(const char *s, Py_ssize_t size, const char *errors) {
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-}
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-/* decode_c_string.proto */
-static CYTHON_INLINE PyObject* __Pyx_decode_c_string(
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-         const char* encoding, const char* errors,
-         PyObject* (*decode_func)(const char *s, Py_ssize_t size, const char *errors));
-
-/* RaiseDoubleKeywords.proto */
-static void __Pyx_RaiseDoubleKeywordsError(const char* func_name, PyObject* kw_name);
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-/* ParseKeywords.proto */
-static int __Pyx_ParseOptionalKeywords(PyObject *kwds, PyObject **argnames[],\
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-/* RaiseArgTupleInvalid.proto */
-static void __Pyx_RaiseArgtupleInvalid(const char* func_name, int exact,
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-
-/* WriteUnraisableException.proto */
-static void __Pyx_WriteUnraisable(const char *name, int clineno,
-                                  int lineno, const char *filename,
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-/* SaveResetException.proto */
-#if CYTHON_FAST_THREAD_STATE
-#define __Pyx_ExceptionSave(type, value, tb)  __Pyx__ExceptionSave(__pyx_tstate, type, value, tb)
-static CYTHON_INLINE void __Pyx__ExceptionSave(PyThreadState *tstate, PyObject **type, PyObject **value, PyObject **tb);
-#define __Pyx_ExceptionReset(type, value, tb)  __Pyx__ExceptionReset(__pyx_tstate, type, value, tb)
-static CYTHON_INLINE void __Pyx__ExceptionReset(PyThreadState *tstate, PyObject *type, PyObject *value, PyObject *tb);
-#else
-#define __Pyx_ExceptionSave(type, value, tb)   PyErr_GetExcInfo(type, value, tb)
-#define __Pyx_ExceptionReset(type, value, tb)  PyErr_SetExcInfo(type, value, tb)
-#endif
-
-/* PyErrExceptionMatches.proto */
-#if CYTHON_FAST_THREAD_STATE
-#define __Pyx_PyErr_ExceptionMatches(err) __Pyx_PyErr_ExceptionMatchesInState(__pyx_tstate, err)
-static CYTHON_INLINE int __Pyx_PyErr_ExceptionMatchesInState(PyThreadState* tstate, PyObject* err);
-#else
-#define __Pyx_PyErr_ExceptionMatches(err)  PyErr_ExceptionMatches(err)
-#endif
-
-/* GetException.proto */
-#if CYTHON_FAST_THREAD_STATE
-#define __Pyx_GetException(type, value, tb)  __Pyx__GetException(__pyx_tstate, type, value, tb)
-static int __Pyx__GetException(PyThreadState *tstate, PyObject **type, PyObject **value, PyObject **tb);
-#else
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-/* PyUnicode_Unicode.proto */
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-/* PyObjectFormatSimple.proto */
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-    #define __Pyx_PyObject_FormatSimple(s, f) (\
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-    #define __Pyx_PyObject_FormatSimple(s, f) (\
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-/* FastTypeChecks.proto */
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-/* PyObjectSetAttrStr.proto */
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-#define __Pyx_PyObject_DelAttrStr(o,n)   PyObject_DelAttr(o,n)
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-/* PyObjectLookupSpecial.proto */
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-#define __Pyx_PyObject_LookupSpecial(o,n) __Pyx_PyObject_GetAttrStr(o,n)
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-/* PyIntBinop.proto */
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-static PyObject* __Pyx_PyInt_AddObjC(PyObject *op1, PyObject *op2, long intval, int inplace);
-#else
-#define __Pyx_PyInt_AddObjC(op1, op2, intval, inplace)\
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-/* DictGetItem.proto */
-#if PY_MAJOR_VERSION >= 3 && !CYTHON_COMPILING_IN_PYPY
-static PyObject *__Pyx_PyDict_GetItem(PyObject *d, PyObject* key);
-#define __Pyx_PyObject_Dict_GetItem(obj, name)\
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-     __Pyx_PyDict_GetItem(obj, name) : PyObject_GetItem(obj, name))
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-#define __Pyx_PyDict_GetItem(d, key) PyObject_GetItem(d, key)
-#define __Pyx_PyObject_Dict_GetItem(obj, name)  PyObject_GetItem(obj, name)
-#endif
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-/* PyObject_GenericGetAttrNoDict.proto */
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-static CYTHON_INLINE PyObject* __Pyx_PyObject_GenericGetAttrNoDict(PyObject* obj, PyObject* attr_name);
-#else
-#define __Pyx_PyObject_GenericGetAttrNoDict PyObject_GenericGetAttr
-#endif
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-/* PyObject_GenericGetAttr.proto */
-#if CYTHON_USE_TYPE_SLOTS && CYTHON_USE_PYTYPE_LOOKUP && PY_VERSION_HEX < 0x03070000
-static PyObject* __Pyx_PyObject_GenericGetAttr(PyObject* obj, PyObject* attr_name);
-#else
-#define __Pyx_PyObject_GenericGetAttr PyObject_GenericGetAttr
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-/* SetVTable.proto */
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-/* SetupReduce.proto */
-static int __Pyx_setup_reduce(PyObject* type_obj);
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-/* Import.proto */
-static PyObject *__Pyx_Import(PyObject *name, PyObject *from_list, int level);
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-/* ImportFrom.proto */
-static PyObject* __Pyx_ImportFrom(PyObject* module, PyObject* name);
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-/* CalculateMetaclass.proto */
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-/* Py3ClassCreate.proto */
-static PyObject *__Pyx_Py3MetaclassPrepare(PyObject *metaclass, PyObject *bases, PyObject *name, PyObject *qualname,
-                                           PyObject *mkw, PyObject *modname, PyObject *doc);
-static PyObject *__Pyx_Py3ClassCreate(PyObject *metaclass, PyObject *name, PyObject *bases, PyObject *dict,
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-/* GetNameInClass.proto */
-static PyObject *__Pyx_GetNameInClass(PyObject *nmspace, PyObject *name);
-
-/* CLineInTraceback.proto */
-#ifdef CYTHON_CLINE_IN_TRACEBACK
-#define __Pyx_CLineForTraceback(tstate, c_line)  (((CYTHON_CLINE_IN_TRACEBACK)) ? c_line : 0)
-#else
-static int __Pyx_CLineForTraceback(PyThreadState *tstate, int c_line);
-#endif
-
-/* CodeObjectCache.proto */
-typedef struct {
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-    int code_line;
-} __Pyx_CodeObjectCacheEntry;
-struct __Pyx_CodeObjectCache {
-    int count;
-    int max_count;
-    __Pyx_CodeObjectCacheEntry* entries;
-};
-static struct __Pyx_CodeObjectCache __pyx_code_cache = {0,0,NULL};
-static int __pyx_bisect_code_objects(__Pyx_CodeObjectCacheEntry* entries, int count, int code_line);
-static PyCodeObject *__pyx_find_code_object(int code_line);
-static void __pyx_insert_code_object(int code_line, PyCodeObject* code_object);
-
-/* AddTraceback.proto */
-static void __Pyx_AddTraceback(const char *funcname, int c_line,
-                               int py_line, const char *filename);
-
-/* CIntToPy.proto */
-static CYTHON_INLINE PyObject* __Pyx_PyInt_From_int(int value);
-
-/* CIntToPy.proto */
-static CYTHON_INLINE PyObject* __Pyx_PyInt_From_unsigned_int(unsigned int value);
-
-/* CIntToPy.proto */
-static CYTHON_INLINE PyObject* __Pyx_PyInt_From_unsigned_long(unsigned long value);
-
-/* CIntToPy.proto */
-static CYTHON_INLINE PyObject* __Pyx_PyInt_From_long(long value);
-
-/* CIntToPy.proto */
-static CYTHON_INLINE PyObject* __Pyx_PyInt_From_MDB_dbi(MDB_dbi value);
-
-static PyObject* __pyx_convert__to_py_struct__MDB_stat(struct MDB_stat s);
-/* CIntFromPy.proto */
-static CYTHON_INLINE size_t __Pyx_PyInt_As_size_t(PyObject *);
-
-/* CIntFromPy.proto */
-static CYTHON_INLINE MDB_dbi __Pyx_PyInt_As_MDB_dbi(PyObject *);
-
-/* CIntFromPy.proto */
-static CYTHON_INLINE unsigned int __Pyx_PyInt_As_unsigned_int(PyObject *);
-
-/* CIntFromPy.proto */
-static CYTHON_INLINE mode_t __Pyx_PyInt_As_mode_t(PyObject *);
-
-/* CIntFromPy.proto */
-static CYTHON_INLINE int __Pyx_PyInt_As_int(PyObject *);
-
-/* CIntFromPy.proto */
-static CYTHON_INLINE long __Pyx_PyInt_As_long(PyObject *);
-
-/* FetchCommonType.proto */
-static PyTypeObject* __Pyx_FetchCommonType(PyTypeObject* type);
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-/* PyObjectCallMethod1.proto */
-static PyObject* __Pyx_PyObject_CallMethod1(PyObject* obj, PyObject* method_name, PyObject* arg);
-static PyObject* __Pyx__PyObject_CallMethod1(PyObject* method, PyObject* arg);
-
-/* CoroutineBase.proto */
-typedef PyObject *(*__pyx_coroutine_body_t)(PyObject *, PyThreadState *, PyObject *);
-typedef struct {
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-    __pyx_coroutine_body_t body;
-    PyObject *closure;
-    PyObject *exc_type;
-    PyObject *exc_value;
-    PyObject *exc_traceback;
-    PyObject *gi_weakreflist;
-    PyObject *classobj;
-    PyObject *yieldfrom;
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-    PyTypeObject *type, __pyx_coroutine_body_t body, PyObject *code, PyObject *closure,
-    PyObject *name, PyObject *qualname, PyObject *module_name);
-static __pyx_CoroutineObject *__Pyx__Coroutine_NewInit(
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-            PyObject *name, PyObject *qualname, PyObject *module_name);
-static int __Pyx_Coroutine_clear(PyObject *self);
-static PyObject *__Pyx_Coroutine_Send(PyObject *self, PyObject *value);
-static PyObject *__Pyx_Coroutine_Close(PyObject *self);
-static PyObject *__Pyx_Coroutine_Throw(PyObject *gen, PyObject *args);
-#define __Pyx_Coroutine_SwapException(self) {\
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-    __Pyx_Coroutine_ResetFrameBackpointer(self);\
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-#define __Pyx_Coroutine_ResetAndClearException(self) {\
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-#define __Pyx_PyGen_FetchStopIterationValue(pvalue)\
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-
-/* PatchModuleWithCoroutine.proto */
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-/* PatchGeneratorABC.proto */
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-/* Generator.proto */
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-#define __Pyx_Generator_New(body, code, closure, name, qualname, module_name)\
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-/* CheckBinaryVersion.proto */
-static int __Pyx_check_binary_version(void);
-
-/* VoidPtrExport.proto */
-static int __Pyx_ExportVoidPtr(PyObject *name, void *p, const char *sig);
-
-/* FunctionExport.proto */
-static int __Pyx_ExportFunction(const char *name, void (*f)(void), const char *sig);
-
-/* InitStrings.proto */
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-
-static void __pyx_f_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__clear_stale_readers(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self); /* proto*/
-static void __pyx_f_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__init_dbis(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__init_dbis *__pyx_optional_args); /* proto*/
-static void __pyx_f_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_close_env(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self, int __pyx_skip_dispatch, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_close_env *__pyx_optional_args); /* proto*/
-static void __pyx_f_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_destroy(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self, int __pyx_skip_dispatch, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_destroy *__pyx_optional_args); /* proto*/
-static CYTHON_INLINE int __pyx_f_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__key_exists(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self, unsigned char *__pyx_v_key, unsigned char __pyx_v_klen, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__key_exists *__pyx_optional_args); /* proto*/
-static void __pyx_f_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__put(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self, unsigned char *__pyx_v_key, size_t __pyx_v_key_size, unsigned char *__pyx_v_data, size_t __pyx_v_data_size, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__put *__pyx_optional_args); /* proto*/
-static PyObject *__pyx_f_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_get_data(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self, PyObject *__pyx_v_key, int __pyx_skip_dispatch, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_get_data *__pyx_optional_args); /* proto*/
-static void __pyx_f_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__get_data(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self, unsigned char *__pyx_v_key, CYTHON_UNUSED size_t __pyx_v_klen, struct MDB_val *__pyx_v_rv, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__get_data *__pyx_optional_args); /* proto*/
-static void __pyx_f_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__delete(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self, unsigned char *__pyx_v_key, size_t __pyx_v_klen, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__delete *__pyx_optional_args); /* proto*/
-static PyObject *__pyx_f_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_stats(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self, int __pyx_skip_dispatch); /* proto*/
-static PyObject *__pyx_f_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__stats(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self); /* proto*/
-static void __pyx_f_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__txn_begin(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__txn_begin *__pyx_optional_args); /* proto*/
-static void __pyx_f_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__txn_commit(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self); /* proto*/
-static void __pyx_f_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__txn_abort(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self); /* proto*/
-static int __pyx_f_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_txn_id(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self, int __pyx_skip_dispatch); /* proto*/
-static size_t __pyx_f_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__txn_id(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self); /* proto*/
-static MDB_dbi __pyx_f_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_get_dbi(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_get_dbi *__pyx_optional_args); /* proto*/
-static MDB_cursor *__pyx_f_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__cur_open(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__cur_open *__pyx_optional_args); /* proto*/
-static void __pyx_f_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__cur_close(CYTHON_UNUSED struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self, MDB_cursor *__pyx_v_cur); /* proto*/
-
-/* Module declarations from 'libc.stdint' */
-
-/* Module declarations from 'posix.types' */
-
-/* Module declarations from 'lakesuperior.cy_include.cylmdb' */
-
-/* Module declarations from 'lakesuperior.cy_include' */
-
-/* Module declarations from 'libc' */
-
-/* Module declarations from 'libc.errno' */
-
-/* Module declarations from 'cpython.mem' */
-
-/* Module declarations from 'lakesuperior.store.base_lmdb_store' */
-static PyTypeObject *__pyx_ptype_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore = 0;
-static PyTypeObject *__pyx_ptype_12lakesuperior_5store_15base_lmdb_store___pyx_scope_struct__txn_ctx = 0;
-static int __pyx_v_12lakesuperior_5store_15base_lmdb_store_rc;
-static size_t __pyx_v_12lakesuperior_5store_15base_lmdb_store_i;
-static struct MDB_val __pyx_v_12lakesuperior_5store_15base_lmdb_store_key_v;
-static struct MDB_val __pyx_v_12lakesuperior_5store_15base_lmdb_store_data_v;
-static MDB_dbi __pyx_v_12lakesuperior_5store_15base_lmdb_store_dbi;
-static void __pyx_f_12lakesuperior_5store_15base_lmdb_store__check(int, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store__check *__pyx_optional_args); /*proto*/
-#define __Pyx_MODULE_NAME "lakesuperior.store.base_lmdb_store"
-extern int __pyx_module_is_main_lakesuperior__store__base_lmdb_store;
-int __pyx_module_is_main_lakesuperior__store__base_lmdb_store = 0;
-
-/* Implementation of 'lakesuperior.store.base_lmdb_store' */
-static PyObject *__pyx_builtin_MemoryError;
-static PyObject *__pyx_builtin_enumerate;
-static PyObject *__pyx_builtin_RuntimeError;
-static PyObject *__pyx_builtin_TypeError;
-static const char __pyx_k_[] = "";
-static const char __pyx_k_i[] = "i";
-static const char __pyx_k_x[] = "{:x}";
-static const char __pyx_k_RO[] = "RO";
-static const char __pyx_k_RW[] = "RW";
-static const char __pyx_k__4[] = ".";
-static const char __pyx_k__6[] = ": ";
-static const char __pyx_k_os[] = "os";
-static const char __pyx_k_rc[] = "rc";
-static const char __pyx_k_DBI[] = " (DBI ";
-static const char __pyx_k__20[] = ")...";
-static const char __pyx_k_dbi[] = "dbi";
-static const char __pyx_k_doc[] = "__doc__";
-static const char __pyx_k_env[] = "env";
-static const char __pyx_k_get[] = "get";
-static const char __pyx_k_key[] = "key";
-static const char __pyx_k_pid[] = "pid";
-static const char __pyx_k_None[] = "None";
-static const char __pyx_k_args[] = "args";
-static const char __pyx_k_data[] = "data";
-static const char __pyx_k_exit[] = "__exit__";
-static const char __pyx_k_info[] = "info";
-static const char __pyx_k_lock[] = "-lock";
-static const char __pyx_k_main[] = "__main__";
-static const char __pyx_k_mode[] = "mode";
-static const char __pyx_k_name[] = "__name__";
-static const char __pyx_k_path[] = "path";
-static const char __pyx_k_send[] = "send";
-static const char __pyx_k_stat[] = "stat";
-static const char __pyx_k_test[] = "__test__";
-static const char __pyx_k_wsgi[] = "wsgi";
-static const char __pyx_k_abort[] = "abort";
-static const char __pyx_k_close[] = "close";
-static const char __pyx_k_debug[] = "debug";
-static const char __pyx_k_enter[] = "__enter__";
-static const char __pyx_k_flags[] = "flags";
-static const char __pyx_k_index[] = "index";
-static const char __pyx_k_key_v[] = "key_v";
-static const char __pyx_k_stats[] = "stats";
-static const char __pyx_k_throw[] = "throw";
-static const char __pyx_k_write[] = "write";
-static const char __pyx_k_create[] = "create";
-static const char __pyx_k_data_v[] = "data_v";
-static const char __pyx_k_encode[] = "encode";
-static const char __pyx_k_exists[] = "exists";
-static const char __pyx_k_format[] = "format";
-static const char __pyx_k_import[] = "__import__";
-static const char __pyx_k_logger[] = "logger";
-static const char __pyx_k_module[] = "__module__";
-static const char __pyx_k_path_2[] = "_path";
-static const char __pyx_k_reduce[] = "__reduce__";
-static const char __pyx_k_rmtree[] = "rmtree";
-static const char __pyx_k_shutil[] = "shutil";
-static const char __pyx_k_txn_id[] = "txn_id";
-static const char __pyx_k_unlink[] = "unlink";
-static const char __pyx_k_dblabel[] = "dblabel";
-static const char __pyx_k_destroy[] = "destroy";
-static const char __pyx_k_dirname[] = "dirname";
-static const char __pyx_k_getName[] = "getName";
-static const char __pyx_k_is_open[] = "is_open";
-static const char __pyx_k_logging[] = "logging";
-static const char __pyx_k_max_dbs[] = "max_dbs";
-static const char __pyx_k_new_txn[] = "new_txn";
-static const char __pyx_k_options[] = "options";
-static const char __pyx_k_prepare[] = "__prepare__";
-static const char __pyx_k_st_size[] = "st_size";
-static const char __pyx_k_txn_ctx[] = "txn_ctx";
-static const char __pyx_k_warning[] = "warning";
-static const char __pyx_k_workers[] = "workers";
-static const char __pyx_k_db_stats[] = "db_stats";
-static const char __pyx_k_env_path[] = "env_path";
-static const char __pyx_k_env_size[] = "env_size";
-static const char __pyx_k_exist_ok[] = "exist_ok";
-static const char __pyx_k_get_data[] = "get_data";
-static const char __pyx_k_getstate[] = "__getstate__";
-static const char __pyx_k_makedirs[] = "makedirs";
-static const char __pyx_k_map_size[] = "map_size";
-static const char __pyx_k_ms_depth[] = "ms_depth";
-static const char __pyx_k_ms_psize[] = "ms_psize";
-static const char __pyx_k_open_env[] = "open_env";
-static const char __pyx_k_opened_x[] = "...opened @ {:x}.";
-static const char __pyx_k_pyx_capi[] = "__pyx_capi__";
-static const char __pyx_k_qualname[] = "__qualname__";
-static const char __pyx_k_setstate[] = "__setstate__";
-static const char __pyx_k_LmdbError[] = "LmdbError";
-static const char __pyx_k_TypeError[] = "TypeError";
-static const char __pyx_k_close_env[] = "close_env";
-static const char __pyx_k_dbi_flags[] = "dbi_flags";
-static const char __pyx_k_enumerate[] = "enumerate";
-static const char __pyx_k_env_flags[] = "env_flags";
-static const char __pyx_k_env_perms[] = "env_perms";
-static const char __pyx_k_env_stats[] = "env_stats";
-static const char __pyx_k_getLogger[] = "getLogger";
-static const char __pyx_k_is_txn_rw[] = "is_txn_rw";
-static const char __pyx_k_metaclass[] = "__metaclass__";
-static const char __pyx_k_reduce_ex[] = "__reduce_ex__";
-static const char __pyx_k_threading[] = "threading";
-static const char __pyx_k_Created_DB[] = "Created DB ";
-static const char __pyx_k_LMDB_Error[] = "LMDB Error ({}): ";
-static const char __pyx_k_contextlib[] = "contextlib";
-static const char __pyx_k_dbi_labels[] = "dbi_labels";
-static const char __pyx_k_ms_entries[] = "ms_entries";
-static const char __pyx_k_pyx_vtable[] = "__pyx_vtable__";
-static const char __pyx_k_Max_readers[] = "Max. readers: {}";
-static const char __pyx_k_MemoryError[] = "MemoryError";
-static const char __pyx_k_txn_is_open[] = "txn is open: {}";
-static const char __pyx_k_Creating_DBs[] = "Creating DBs.";
-static const char __pyx_k_RuntimeError[] = "RuntimeError";
-static const char __pyx_k_lakesuperior[] = "lakesuperior";
-static const char __pyx_k_readers_mult[] = "readers_mult";
-static const char __pyx_k_currentThread[] = "currentThread";
-static const char __pyx_k_ms_leaf_pages[] = "ms_leaf_pages";
-static const char __pyx_k_reduce_cython[] = "__reduce_cython__";
-static const char __pyx_k_Internal_error[] = "\nInternal error ({}): ";
-static const char __pyx_k_KeyExistsError[] = "KeyExistsError";
-static const char __pyx_k_contextmanager[] = "contextmanager";
-static const char __pyx_k_max_spare_txns[] = "max_spare_txns";
-static const char __pyx_k_Created_DBenv_x[] = "Created DBenv @ {:x}";
-static const char __pyx_k_DBenv_address_x[] = "DBenv address: {:x}";
-static const char __pyx_k_current_process[] = "current_process";
-static const char __pyx_k_ms_branch_pages[] = "ms_branch_pages";
-static const char __pyx_k_multiprocessing[] = "multiprocessing";
-static const char __pyx_k_setstate_cython[] = "__setstate_cython__";
-static const char __pyx_k_KeyNotFoundError[] = "KeyNotFoundError";
-static const char __pyx_k_Closing_store_env[] = "Closing store env.";
-static const char __pyx_k_FileNotFoundError[] = "FileNotFoundError";
-static const char __pyx_k_Store_is_not_open[] = "Store is not open.";
-static const char __pyx_k_ms_overflow_pages[] = "ms_overflow_pages";
-static const char __pyx_k_Error_putting_data[] = "Error putting data: {}, {}";
-static const char __pyx_k_cline_in_traceback[] = "cline_in_traceback";
-static const char __pyx_k_Transaction_aborted[] = "Transaction @ {} aborted.";
-static const char __pyx_k_Error_opening_cursor[] = "Error opening cursor: ";
-static const char __pyx_k_Opened_transaction_x[] = "Opened transaction @ {:x}";
-static const char __pyx_k_BaseLmdbStore_txn_ctx[] = "BaseLmdbStore.txn_ctx";
-static const char __pyx_k_Cleaning_up_store_env[] = "Cleaning up store env.";
-static const char __pyx_k_Cleared_stale_readers[] = "Cleared {} stale readers.";
-static const char __pyx_k_Opening_cursor_for_DB[] = "Opening cursor for DB ";
-static const char __pyx_k_Transaction_committed[] = "Transaction @ {} committed.";
-static const char __pyx_k_Error_setting_map_size[] = "Error setting map size: {}";
-static const char __pyx_k_Opening_environment_at[] = "Opening environment at {}.";
-static const char __pyx_k_Environment_already_open[] = "Environment already open.";
-static const char __pyx_k_Error_opening_transaction[] = "Error opening transaction.";
-static const char __pyx_k_Error_setting_max_readers[] = "Error setting max. readers: {}";
-static const char __pyx_k_Getting_DBI_without_label[] = "Getting DBI without label.";
-static const char __pyx_k_Error_getting_data_for_key[] = "Error getting data for key '{}'.";
-static const char __pyx_k_Store_must_be_opened_first[] = "Store must be opened first.";
-static const char __pyx_k_commit_pending_transaction[] = "commit_pending_transaction";
-static const char __pyx_k_Error_getting_datbase_stats[] = "Error getting datbase stats: {}";
-static const char __pyx_k_Error_setting_max_databases[] = "Error setting max. databases: {}";
-static const char __pyx_k_Could_not_create_store_at_Error[] = "Could not create store at {}. Error: {}";
-static const char __pyx_k_Error_creating_DB_environment_ha[] = "Error creating DB environment handle: {}";
-static const char __pyx_k_Error_opening_the_database_envir[] = "Error opening the database environment: ";
-static const char __pyx_k_Opening_transaction_in_PID_threa[] = "Opening {} transaction in PID {}, thread {}";
-static const char __pyx_k_Transaction_is_already_active_No[] = "Transaction is already active. Not opening another one.";
-static const char __pyx_k_lakesuperior_store_base_lmdb_sto[] = "lakesuperior.store.base_lmdb_store";
-static const char __pyx_k_self_curs_self_dbenv_self_dbis_s[] = "self.curs,self.dbenv,self.dbis,self.txn cannot be converted to a Python object for pickling";
-static PyObject *__pyx_kp_u_;
-static PyObject *__pyx_n_s_BaseLmdbStore_txn_ctx;
-static PyObject *__pyx_kp_u_Cleaning_up_store_env;
-static PyObject *__pyx_kp_u_Cleared_stale_readers;
-static PyObject *__pyx_kp_u_Closing_store_env;
-static PyObject *__pyx_kp_u_Could_not_create_store_at_Error;
-static PyObject *__pyx_kp_u_Created_DB;
-static PyObject *__pyx_kp_u_Created_DBenv_x;
-static PyObject *__pyx_kp_u_Creating_DBs;
-static PyObject *__pyx_kp_u_DBI;
-static PyObject *__pyx_kp_u_DBenv_address_x;
-static PyObject *__pyx_kp_u_Environment_already_open;
-static PyObject *__pyx_kp_u_Error_creating_DB_environment_ha;
-static PyObject *__pyx_kp_u_Error_getting_data_for_key;
-static PyObject *__pyx_kp_u_Error_getting_datbase_stats;
-static PyObject *__pyx_kp_u_Error_opening_cursor;
-static PyObject *__pyx_kp_u_Error_opening_the_database_envir;
-static PyObject *__pyx_kp_u_Error_opening_transaction;
-static PyObject *__pyx_kp_u_Error_putting_data;
-static PyObject *__pyx_kp_u_Error_setting_map_size;
-static PyObject *__pyx_kp_u_Error_setting_max_databases;
-static PyObject *__pyx_kp_u_Error_setting_max_readers;
-static PyObject *__pyx_n_s_FileNotFoundError;
-static PyObject *__pyx_kp_u_Getting_DBI_without_label;
-static PyObject *__pyx_kp_u_Internal_error;
-static PyObject *__pyx_n_s_KeyExistsError;
-static PyObject *__pyx_n_s_KeyNotFoundError;
-static PyObject *__pyx_kp_u_LMDB_Error;
-static PyObject *__pyx_n_s_LmdbError;
-static PyObject *__pyx_kp_u_Max_readers;
-static PyObject *__pyx_n_s_MemoryError;
-static PyObject *__pyx_kp_u_None;
-static PyObject *__pyx_kp_u_Opened_transaction_x;
-static PyObject *__pyx_kp_u_Opening_cursor_for_DB;
-static PyObject *__pyx_kp_u_Opening_environment_at;
-static PyObject *__pyx_kp_u_Opening_transaction_in_PID_threa;
-static PyObject *__pyx_n_u_RO;
-static PyObject *__pyx_n_u_RW;
-static PyObject *__pyx_n_s_RuntimeError;
-static PyObject *__pyx_kp_u_Store_is_not_open;
-static PyObject *__pyx_kp_u_Store_must_be_opened_first;
-static PyObject *__pyx_kp_u_Transaction_aborted;
-static PyObject *__pyx_kp_u_Transaction_committed;
-static PyObject *__pyx_kp_u_Transaction_is_already_active_No;
-static PyObject *__pyx_n_s_TypeError;
-static PyObject *__pyx_kp_u__20;
-static PyObject *__pyx_kp_u__4;
-static PyObject *__pyx_kp_u__6;
-static PyObject *__pyx_n_s_abort;
-static PyObject *__pyx_n_s_args;
-static PyObject *__pyx_n_s_cline_in_traceback;
-static PyObject *__pyx_n_s_close;
-static PyObject *__pyx_n_s_close_env;
-static PyObject *__pyx_n_s_commit_pending_transaction;
-static PyObject *__pyx_n_s_contextlib;
-static PyObject *__pyx_n_s_contextmanager;
-static PyObject *__pyx_n_s_create;
-static PyObject *__pyx_n_s_currentThread;
-static PyObject *__pyx_n_s_current_process;
-static PyObject *__pyx_n_s_data;
-static PyObject *__pyx_n_s_data_v;
-static PyObject *__pyx_n_u_db_stats;
-static PyObject *__pyx_n_s_dbi;
-static PyObject *__pyx_n_s_dbi_flags;
-static PyObject *__pyx_n_s_dbi_labels;
-static PyObject *__pyx_n_s_dblabel;
-static PyObject *__pyx_n_s_debug;
-static PyObject *__pyx_n_s_destroy;
-static PyObject *__pyx_n_s_dirname;
-static PyObject *__pyx_n_s_doc;
-static PyObject *__pyx_n_s_encode;
-static PyObject *__pyx_n_s_enter;
-static PyObject *__pyx_n_s_enumerate;
-static PyObject *__pyx_n_s_env;
-static PyObject *__pyx_n_s_env_flags;
-static PyObject *__pyx_n_s_env_path;
-static PyObject *__pyx_n_s_env_perms;
-static PyObject *__pyx_n_u_env_size;
-static PyObject *__pyx_n_u_env_stats;
-static PyObject *__pyx_n_s_exist_ok;
-static PyObject *__pyx_n_s_exists;
-static PyObject *__pyx_n_s_exit;
-static PyObject *__pyx_n_s_flags;
-static PyObject *__pyx_n_s_format;
-static PyObject *__pyx_n_s_get;
-static PyObject *__pyx_n_s_getLogger;
-static PyObject *__pyx_n_s_getName;
-static PyObject *__pyx_n_s_get_data;
-static PyObject *__pyx_n_s_getstate;
-static PyObject *__pyx_n_s_i;
-static PyObject *__pyx_n_s_import;
-static PyObject *__pyx_n_s_index;
-static PyObject *__pyx_n_s_info;
-static PyObject *__pyx_n_s_is_open;
-static PyObject *__pyx_n_s_is_txn_rw;
-static PyObject *__pyx_n_s_key;
-static PyObject *__pyx_n_s_key_v;
-static PyObject *__pyx_n_s_lakesuperior;
-static PyObject *__pyx_n_s_lakesuperior_store_base_lmdb_sto;
-static PyObject *__pyx_kp_u_lock;
-static PyObject *__pyx_n_s_logger;
-static PyObject *__pyx_n_s_logging;
-static PyObject *__pyx_n_s_main;
-static PyObject *__pyx_n_s_makedirs;
-static PyObject *__pyx_n_u_map_size;
-static PyObject *__pyx_n_u_max_dbs;
-static PyObject *__pyx_n_u_max_spare_txns;
-static PyObject *__pyx_n_s_metaclass;
-static PyObject *__pyx_n_s_mode;
-static PyObject *__pyx_n_s_module;
-static PyObject *__pyx_n_s_ms_branch_pages;
-static PyObject *__pyx_n_s_ms_depth;
-static PyObject *__pyx_n_s_ms_entries;
-static PyObject *__pyx_n_s_ms_leaf_pages;
-static PyObject *__pyx_n_s_ms_overflow_pages;
-static PyObject *__pyx_n_s_ms_psize;
-static PyObject *__pyx_n_s_multiprocessing;
-static PyObject *__pyx_n_s_name;
-static PyObject *__pyx_n_s_new_txn;
-static PyObject *__pyx_n_s_open_env;
-static PyObject *__pyx_kp_u_opened_x;
-static PyObject *__pyx_n_s_options;
-static PyObject *__pyx_n_s_os;
-static PyObject *__pyx_n_s_path;
-static PyObject *__pyx_n_s_path_2;
-static PyObject *__pyx_n_s_pid;
-static PyObject *__pyx_n_s_prepare;
-static PyObject *__pyx_n_s_pyx_capi;
-static PyObject *__pyx_n_s_pyx_vtable;
-static PyObject *__pyx_n_s_qualname;
-static PyObject *__pyx_n_s_rc;
-static PyObject *__pyx_n_s_readers_mult;
-static PyObject *__pyx_n_s_reduce;
-static PyObject *__pyx_n_s_reduce_cython;
-static PyObject *__pyx_n_s_reduce_ex;
-static PyObject *__pyx_n_s_rmtree;
-static PyObject *__pyx_kp_s_self_curs_self_dbenv_self_dbis_s;
-static PyObject *__pyx_n_s_send;
-static PyObject *__pyx_n_s_setstate;
-static PyObject *__pyx_n_s_setstate_cython;
-static PyObject *__pyx_n_s_shutil;
-static PyObject *__pyx_n_s_st_size;
-static PyObject *__pyx_n_s_stat;
-static PyObject *__pyx_n_s_stats;
-static PyObject *__pyx_n_s_test;
-static PyObject *__pyx_n_s_threading;
-static PyObject *__pyx_n_s_throw;
-static PyObject *__pyx_n_s_txn_ctx;
-static PyObject *__pyx_n_s_txn_id;
-static PyObject *__pyx_kp_u_txn_is_open;
-static PyObject *__pyx_n_s_unlink;
-static PyObject *__pyx_n_s_warning;
-static PyObject *__pyx_n_s_workers;
-static PyObject *__pyx_n_s_write;
-static PyObject *__pyx_n_s_wsgi;
-static PyObject *__pyx_kp_u_x;
-static int __pyx_pf_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore___init__(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self, PyObject *__pyx_v_env_path, PyObject *__pyx_v_open_env, PyObject *__pyx_v_create); /* proto */
-static void __pyx_pf_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_2__dealloc__(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_7is_open___get__(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_7readers___get__(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_4open_env(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self, PyObject *__pyx_v_create); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_6close_env(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self, int __pyx_v_commit_pending_transaction); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_8destroy(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self, PyObject *__pyx_v__path); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_10txn_ctx(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self, PyObject *__pyx_v_write); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_13begin(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self, PyObject *__pyx_v_write); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_15commit(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_17abort(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_19rollback(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_21key_exists(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self, PyObject *__pyx_v_key, PyObject *__pyx_v_dblabel, PyObject *__pyx_v_new_txn); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_23put(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self, PyObject *__pyx_v_key, PyObject *__pyx_v_data, PyObject *__pyx_v_dblabel, PyObject *__pyx_v_flags); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_25get_data(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self, PyObject *__pyx_v_key, PyObject *__pyx_v_dblabel); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_27delete(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self, PyObject *__pyx_v_key, PyObject *__pyx_v_dblabel); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_29stats(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_31txn_id(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_11is_txn_open___get__(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_5_open___get__(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self); /* proto */
-static int __pyx_pf_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_5_open_2__set__(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_v_self, PyObject *__pyx_v_value); /* proto */
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-#if PY_MAJOR_VERSION < 3
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-/* GetBuiltinName */
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-#if PY_MAJOR_VERSION >= 3
-            "name '%U' is not defined", name);
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-/* Profile */
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-                                   PyThreadState* tstate,
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-                                   const char *srcfile,
-                                   int firstlineno) {
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-    __Pyx_ErrFetchInState(tstate, &type, &value, &traceback);
-    #if CYTHON_TRACE
-    if (tstate->c_tracefunc)
-        retval = tstate->c_tracefunc(tstate->c_traceobj, *frame, PyTrace_CALL, NULL) == 0;
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-    #endif
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-                           (CYTHON_TRACE && tstate->c_tracefunc));
-    tstate->tracing--;
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-        __Pyx_ErrRestoreInState(tstate, type, value, traceback);
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-static PyCodeObject *__Pyx_createFrameCodeObject(const char *funcname, const char *srcfile, int firstlineno) {
-    PyObject *py_srcfile = 0;
-    PyObject *py_funcname = 0;
-    PyCodeObject *py_code = 0;
-    #if PY_MAJOR_VERSION < 3
-    py_funcname = PyString_FromString(funcname);
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-    py_funcname = PyUnicode_FromString(funcname);
-    py_srcfile = PyUnicode_FromString(srcfile);
-    #endif
-    if (!py_funcname | !py_srcfile) goto bad;
-    py_code = PyCode_New(
-        0,
-        #if PY_MAJOR_VERSION >= 3
-        0,
-        #endif
-        0,
-        0,
-        CO_OPTIMIZED | CO_NEWLOCALS,
-        __pyx_empty_bytes,     /*PyObject *code,*/
-        __pyx_empty_tuple,     /*PyObject *consts,*/
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-        __pyx_empty_tuple,     /*PyObject *varnames,*/
-        __pyx_empty_tuple,     /*PyObject *freevars,*/
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-        firstlineno,
-        __pyx_empty_bytes      /*PyObject *lnotab*/
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-bad:
-    Py_XDECREF(py_srcfile);
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-    return py_code;
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-#endif
-
-/* GetModuleGlobalName */
-static CYTHON_INLINE PyObject *__Pyx_GetModuleGlobalName(PyObject *name) {
-    PyObject *result;
-#if !CYTHON_AVOID_BORROWED_REFS
-#if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x030500A1
-    result = _PyDict_GetItem_KnownHash(__pyx_d, name, ((PyASCIIObject *) name)->hash);
-    if (likely(result)) {
-        Py_INCREF(result);
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-        result = NULL;
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-#else
-    result = PyDict_GetItem(__pyx_d, name);
-    if (likely(result)) {
-        Py_INCREF(result);
-    } else {
-#endif
-#else
-    result = PyObject_GetItem(__pyx_d, name);
-    if (!result) {
-        PyErr_Clear();
-#endif
-        result = __Pyx_GetBuiltinName(name);
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-    return result;
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-
-/* PyCFunctionFastCall */
-    #if CYTHON_FAST_PYCCALL
-static CYTHON_INLINE PyObject * __Pyx_PyCFunction_FastCall(PyObject *func_obj, PyObject **args, Py_ssize_t nargs) {
-    PyCFunctionObject *func = (PyCFunctionObject*)func_obj;
-    PyCFunction meth = PyCFunction_GET_FUNCTION(func);
-    PyObject *self = PyCFunction_GET_SELF(func);
-    int flags = PyCFunction_GET_FLAGS(func);
-    assert(PyCFunction_Check(func));
-    assert(METH_FASTCALL == (flags & ~(METH_CLASS | METH_STATIC | METH_COEXIST | METH_KEYWORDS)));
-    assert(nargs >= 0);
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-    /* _PyCFunction_FastCallDict() must not be called with an exception set,
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-       caller loses its exception */
-    assert(!PyErr_Occurred());
-    if ((PY_VERSION_HEX < 0x030700A0) || unlikely(flags & METH_KEYWORDS)) {
-        return (*((__Pyx_PyCFunctionFastWithKeywords)meth)) (self, args, nargs, NULL);
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-        return (*((__Pyx_PyCFunctionFast)meth)) (self, args, nargs);
-    }
-}
-#endif
-
-/* PyFunctionFastCall */
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-#include "frameobject.h"
-static PyObject* __Pyx_PyFunction_FastCallNoKw(PyCodeObject *co, PyObject **args, Py_ssize_t na,
-                                               PyObject *globals) {
-    PyFrameObject *f;
-    PyThreadState *tstate = __Pyx_PyThreadState_Current;
-    PyObject **fastlocals;
-    Py_ssize_t i;
-    PyObject *result;
-    assert(globals != NULL);
-    /* XXX Perhaps we should create a specialized
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-    assert(tstate != NULL);
-    f = PyFrame_New(tstate, co, globals, NULL);
-    if (f == NULL) {
-        return NULL;
-    }
-    fastlocals = f->f_localsplus;
-    for (i = 0; i < na; i++) {
-        Py_INCREF(*args);
-        fastlocals[i] = *args++;
-    }
-    result = PyEval_EvalFrameEx(f,0);
-    ++tstate->recursion_depth;
-    Py_DECREF(f);
-    --tstate->recursion_depth;
-    return result;
-}
-#if 1 || PY_VERSION_HEX < 0x030600B1
-static PyObject *__Pyx_PyFunction_FastCallDict(PyObject *func, PyObject **args, int nargs, PyObject *kwargs) {
-    PyCodeObject *co = (PyCodeObject *)PyFunction_GET_CODE(func);
-    PyObject *globals = PyFunction_GET_GLOBALS(func);
-    PyObject *argdefs = PyFunction_GET_DEFAULTS(func);
-    PyObject *closure;
-#if PY_MAJOR_VERSION >= 3
-    PyObject *kwdefs;
-#endif
-    PyObject *kwtuple, **k;
-    PyObject **d;
-    Py_ssize_t nd;
-    Py_ssize_t nk;
-    PyObject *result;
-    assert(kwargs == NULL || PyDict_Check(kwargs));
-    nk = kwargs ? PyDict_Size(kwargs) : 0;
-    if (Py_EnterRecursiveCall((char*)" while calling a Python object")) {
-        return NULL;
-    }
-    if (
-#if PY_MAJOR_VERSION >= 3
-            co->co_kwonlyargcount == 0 &&
-#endif
-            likely(kwargs == NULL || nk == 0) &&
-            co->co_flags == (CO_OPTIMIZED | CO_NEWLOCALS | CO_NOFREE)) {
-        if (argdefs == NULL && co->co_argcount == nargs) {
-            result = __Pyx_PyFunction_FastCallNoKw(co, args, nargs, globals);
-            goto done;
-        }
-        else if (nargs == 0 && argdefs != NULL
-                 && co->co_argcount == Py_SIZE(argdefs)) {
-            /* function called with no arguments, but all parameters have
-               a default value: use default values as arguments .*/
-            args = &PyTuple_GET_ITEM(argdefs, 0);
-            result =__Pyx_PyFunction_FastCallNoKw(co, args, Py_SIZE(argdefs), globals);
-            goto done;
-        }
-    }
-    if (kwargs != NULL) {
-        Py_ssize_t pos, i;
-        kwtuple = PyTuple_New(2 * nk);
-        if (kwtuple == NULL) {
-            result = NULL;
-            goto done;
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-        k = &PyTuple_GET_ITEM(kwtuple, 0);
-        pos = i = 0;
-        while (PyDict_Next(kwargs, &pos, &k[i], &k[i+1])) {
-            Py_INCREF(k[i]);
-            Py_INCREF(k[i+1]);
-            i += 2;
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-        nk = i / 2;
-    }
-    else {
-        kwtuple = NULL;
-        k = NULL;
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-    closure = PyFunction_GET_CLOSURE(func);
-#if PY_MAJOR_VERSION >= 3
-    kwdefs = PyFunction_GET_KW_DEFAULTS(func);
-#endif
-    if (argdefs != NULL) {
-        d = &PyTuple_GET_ITEM(argdefs, 0);
-        nd = Py_SIZE(argdefs);
-    }
-    else {
-        d = NULL;
-        nd = 0;
-    }
-#if PY_MAJOR_VERSION >= 3
-    result = PyEval_EvalCodeEx((PyObject*)co, globals, (PyObject *)NULL,
-                               args, nargs,
-                               k, (int)nk,
-                               d, (int)nd, kwdefs, closure);
-#else
-    result = PyEval_EvalCodeEx(co, globals, (PyObject *)NULL,
-                               args, nargs,
-                               k, (int)nk,
-                               d, (int)nd, closure);
-#endif
-    Py_XDECREF(kwtuple);
-done:
-    Py_LeaveRecursiveCall();
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-#endif
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-/* PyObjectCall */
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-static CYTHON_INLINE PyObject* __Pyx_PyObject_Call(PyObject *func, PyObject *arg, PyObject *kw) {
-    PyObject *result;
-    ternaryfunc call = func->ob_type->tp_call;
-    if (unlikely(!call))
-        return PyObject_Call(func, arg, kw);
-    if (unlikely(Py_EnterRecursiveCall((char*)" while calling a Python object")))
-        return NULL;
-    result = (*call)(func, arg, kw);
-    Py_LeaveRecursiveCall();
-    if (unlikely(!result) && unlikely(!PyErr_Occurred())) {
-        PyErr_SetString(
-            PyExc_SystemError,
-            "NULL result without error in PyObject_Call");
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-    return result;
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-
-/* PyObjectCallMethO */
-    #if CYTHON_COMPILING_IN_CPYTHON
-static CYTHON_INLINE PyObject* __Pyx_PyObject_CallMethO(PyObject *func, PyObject *arg) {
-    PyObject *self, *result;
-    PyCFunction cfunc;
-    cfunc = PyCFunction_GET_FUNCTION(func);
-    self = PyCFunction_GET_SELF(func);
-    if (unlikely(Py_EnterRecursiveCall((char*)" while calling a Python object")))
-        return NULL;
-    result = cfunc(self, arg);
-    Py_LeaveRecursiveCall();
-    if (unlikely(!result) && unlikely(!PyErr_Occurred())) {
-        PyErr_SetString(
-            PyExc_SystemError,
-            "NULL result without error in PyObject_Call");
-    }
-    return result;
-}
-#endif
-
-/* PyObjectCallOneArg */
-    #if CYTHON_COMPILING_IN_CPYTHON
-static PyObject* __Pyx__PyObject_CallOneArg(PyObject *func, PyObject *arg) {
-    PyObject *result;
-    PyObject *args = PyTuple_New(1);
-    if (unlikely(!args)) return NULL;
-    Py_INCREF(arg);
-    PyTuple_SET_ITEM(args, 0, arg);
-    result = __Pyx_PyObject_Call(func, args, NULL);
-    Py_DECREF(args);
-    return result;
-}
-static CYTHON_INLINE PyObject* __Pyx_PyObject_CallOneArg(PyObject *func, PyObject *arg) {
-#if CYTHON_FAST_PYCALL
-    if (PyFunction_Check(func)) {
-        return __Pyx_PyFunction_FastCall(func, &arg, 1);
-    }
-#endif
-    if (likely(PyCFunction_Check(func))) {
-        if (likely(PyCFunction_GET_FLAGS(func) & METH_O)) {
-            return __Pyx_PyObject_CallMethO(func, arg);
-#if CYTHON_FAST_PYCCALL
-        } else if (PyCFunction_GET_FLAGS(func) & METH_FASTCALL) {
-            return __Pyx_PyCFunction_FastCall(func, &arg, 1);
-#endif
-        }
-    }
-    return __Pyx__PyObject_CallOneArg(func, arg);
-}
-#else
-static CYTHON_INLINE PyObject* __Pyx_PyObject_CallOneArg(PyObject *func, PyObject *arg) {
-    PyObject *result;
-    PyObject *args = PyTuple_Pack(1, arg);
-    if (unlikely(!args)) return NULL;
-    result = __Pyx_PyObject_Call(func, args, NULL);
-    Py_DECREF(args);
-    return result;
-}
-#endif
-
-/* PyObjectCallNoArg */
-    #if CYTHON_COMPILING_IN_CPYTHON
-static CYTHON_INLINE PyObject* __Pyx_PyObject_CallNoArg(PyObject *func) {
-#if CYTHON_FAST_PYCALL
-    if (PyFunction_Check(func)) {
-        return __Pyx_PyFunction_FastCall(func, NULL, 0);
-    }
-#endif
-#ifdef __Pyx_CyFunction_USED
-    if (likely(PyCFunction_Check(func) || __Pyx_TypeCheck(func, __pyx_CyFunctionType))) {
-#else
-    if (likely(PyCFunction_Check(func))) {
-#endif
-        if (likely(PyCFunction_GET_FLAGS(func) & METH_NOARGS)) {
-            return __Pyx_PyObject_CallMethO(func, NULL);
-        }
-    }
-    return __Pyx_PyObject_Call(func, __pyx_empty_tuple, NULL);
-}
-#endif
-
-/* RaiseException */
-      #if PY_MAJOR_VERSION < 3
-static void __Pyx_Raise(PyObject *type, PyObject *value, PyObject *tb,
-                        CYTHON_UNUSED PyObject *cause) {
-    __Pyx_PyThreadState_declare
-    Py_XINCREF(type);
-    if (!value || value == Py_None)
-        value = NULL;
-    else
-        Py_INCREF(value);
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-        tb = NULL;
-    else {
-        Py_INCREF(tb);
-        if (!PyTraceBack_Check(tb)) {
-            PyErr_SetString(PyExc_TypeError,
-                "raise: arg 3 must be a traceback or None");
-            goto raise_error;
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-    }
-    if (PyType_Check(type)) {
-#if CYTHON_COMPILING_IN_PYPY
-        if (!value) {
-            Py_INCREF(Py_None);
-            value = Py_None;
-        }
-#endif
-        PyErr_NormalizeException(&type, &value, &tb);
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-        if (value) {
-            PyErr_SetString(PyExc_TypeError,
-                "instance exception may not have a separate value");
-            goto raise_error;
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-        value = type;
-        type = (PyObject*) Py_TYPE(type);
-        Py_INCREF(type);
-        if (!PyType_IsSubtype((PyTypeObject *)type, (PyTypeObject *)PyExc_BaseException)) {
-            PyErr_SetString(PyExc_TypeError,
-                "raise: exception class must be a subclass of BaseException");
-            goto raise_error;
-        }
-    }
-    __Pyx_PyThreadState_assign
-    __Pyx_ErrRestore(type, value, tb);
-    return;
-raise_error:
-    Py_XDECREF(value);
-    Py_XDECREF(type);
-    Py_XDECREF(tb);
-    return;
-}
-#else
-static void __Pyx_Raise(PyObject *type, PyObject *value, PyObject *tb, PyObject *cause) {
-    PyObject* owned_instance = NULL;
-    if (tb == Py_None) {
-        tb = 0;
-    } else if (tb && !PyTraceBack_Check(tb)) {
-        PyErr_SetString(PyExc_TypeError,
-            "raise: arg 3 must be a traceback or None");
-        goto bad;
-    }
-    if (value == Py_None)
-        value = 0;
-    if (PyExceptionInstance_Check(type)) {
-        if (value) {
-            PyErr_SetString(PyExc_TypeError,
-                "instance exception may not have a separate value");
-            goto bad;
-        }
-        value = type;
-        type = (PyObject*) Py_TYPE(value);
-    } else if (PyExceptionClass_Check(type)) {
-        PyObject *instance_class = NULL;
-        if (value && PyExceptionInstance_Check(value)) {
-            instance_class = (PyObject*) Py_TYPE(value);
-            if (instance_class != type) {
-                int is_subclass = PyObject_IsSubclass(instance_class, type);
-                if (!is_subclass) {
-                    instance_class = NULL;
-                } else if (unlikely(is_subclass == -1)) {
-                    goto bad;
-                } else {
-                    type = instance_class;
-                }
-            }
-        }
-        if (!instance_class) {
-            PyObject *args;
-            if (!value)
-                args = PyTuple_New(0);
-            else if (PyTuple_Check(value)) {
-                Py_INCREF(value);
-                args = value;
-            } else
-                args = PyTuple_Pack(1, value);
-            if (!args)
-                goto bad;
-            owned_instance = PyObject_Call(type, args, NULL);
-            Py_DECREF(args);
-            if (!owned_instance)
-                goto bad;
-            value = owned_instance;
-            if (!PyExceptionInstance_Check(value)) {
-                PyErr_Format(PyExc_TypeError,
-                             "calling %R should have returned an instance of "
-                             "BaseException, not %R",
-                             type, Py_TYPE(value));
-                goto bad;
-            }
-        }
-    } else {
-        PyErr_SetString(PyExc_TypeError,
-            "raise: exception class must be a subclass of BaseException");
-        goto bad;
-    }
-    if (cause) {
-        PyObject *fixed_cause;
-        if (cause == Py_None) {
-            fixed_cause = NULL;
-        } else if (PyExceptionClass_Check(cause)) {
-            fixed_cause = PyObject_CallObject(cause, NULL);
-            if (fixed_cause == NULL)
-                goto bad;
-        } else if (PyExceptionInstance_Check(cause)) {
-            fixed_cause = cause;
-            Py_INCREF(fixed_cause);
-        } else {
-            PyErr_SetString(PyExc_TypeError,
-                            "exception causes must derive from "
-                            "BaseException");
-            goto bad;
-        }
-        PyException_SetCause(value, fixed_cause);
-    }
-    PyErr_SetObject(type, value);
-    if (tb) {
-#if CYTHON_COMPILING_IN_PYPY
-        PyObject *tmp_type, *tmp_value, *tmp_tb;
-        PyErr_Fetch(&tmp_type, &tmp_value, &tmp_tb);
-        Py_INCREF(tb);
-        PyErr_Restore(tmp_type, tmp_value, tb);
-        Py_XDECREF(tmp_tb);
-#else
-        PyThreadState *tstate = __Pyx_PyThreadState_Current;
-        PyObject* tmp_tb = tstate->curexc_traceback;
-        if (tb != tmp_tb) {
-            Py_INCREF(tb);
-            tstate->curexc_traceback = tb;
-            Py_XDECREF(tmp_tb);
-        }
-#endif
-    }
-bad:
-    Py_XDECREF(owned_instance);
-    return;
-}
-#endif
-
-/* decode_c_string */
-      static CYTHON_INLINE PyObject* __Pyx_decode_c_string(
-         const char* cstring, Py_ssize_t start, Py_ssize_t stop,
-         const char* encoding, const char* errors,
-         PyObject* (*decode_func)(const char *s, Py_ssize_t size, const char *errors)) {
-    Py_ssize_t length;
-    if (unlikely((start < 0) | (stop < 0))) {
-        size_t slen = strlen(cstring);
-        if (unlikely(slen > (size_t) PY_SSIZE_T_MAX)) {
-            PyErr_SetString(PyExc_OverflowError,
-                            "c-string too long to convert to Python");
-            return NULL;
-        }
-        length = (Py_ssize_t) slen;
-        if (start < 0) {
-            start += length;
-            if (start < 0)
-                start = 0;
-        }
-        if (stop < 0)
-            stop += length;
-    }
-    length = stop - start;
-    if (unlikely(length <= 0))
-        return PyUnicode_FromUnicode(NULL, 0);
-    cstring += start;
-    if (decode_func) {
-        return decode_func(cstring, length, errors);
-    } else {
-        return PyUnicode_Decode(cstring, length, encoding, errors);
-    }
-}
-
-/* RaiseDoubleKeywords */
-      static void __Pyx_RaiseDoubleKeywordsError(
-    const char* func_name,
-    PyObject* kw_name)
-{
-    PyErr_Format(PyExc_TypeError,
-        #if PY_MAJOR_VERSION >= 3
-        "%s() got multiple values for keyword argument '%U'", func_name, kw_name);
-        #else
-        "%s() got multiple values for keyword argument '%s'", func_name,
-        PyString_AsString(kw_name));
-        #endif
-}
-
-/* ParseKeywords */
-      static int __Pyx_ParseOptionalKeywords(
-    PyObject *kwds,
-    PyObject **argnames[],
-    PyObject *kwds2,
-    PyObject *values[],
-    Py_ssize_t num_pos_args,
-    const char* function_name)
-{
-    PyObject *key = 0, *value = 0;
-    Py_ssize_t pos = 0;
-    PyObject*** name;
-    PyObject*** first_kw_arg = argnames + num_pos_args;
-    while (PyDict_Next(kwds, &pos, &key, &value)) {
-        name = first_kw_arg;
-        while (*name && (**name != key)) name++;
-        if (*name) {
-            values[name-argnames] = value;
-            continue;
-        }
-        name = first_kw_arg;
-        #if PY_MAJOR_VERSION < 3
-        if (likely(PyString_CheckExact(key)) || likely(PyString_Check(key))) {
-            while (*name) {
-                if ((CYTHON_COMPILING_IN_PYPY || PyString_GET_SIZE(**name) == PyString_GET_SIZE(key))
-                        && _PyString_Eq(**name, key)) {
-                    values[name-argnames] = value;
-                    break;
-                }
-                name++;
-            }
-            if (*name) continue;
-            else {
-                PyObject*** argname = argnames;
-                while (argname != first_kw_arg) {
-                    if ((**argname == key) || (
-                            (CYTHON_COMPILING_IN_PYPY || PyString_GET_SIZE(**argname) == PyString_GET_SIZE(key))
-                             && _PyString_Eq(**argname, key))) {
-                        goto arg_passed_twice;
-                    }
-                    argname++;
-                }
-            }
-        } else
-        #endif
-        if (likely(PyUnicode_Check(key))) {
-            while (*name) {
-                int cmp = (**name == key) ? 0 :
-                #if !CYTHON_COMPILING_IN_PYPY && PY_MAJOR_VERSION >= 3
-                    (PyUnicode_GET_SIZE(**name) != PyUnicode_GET_SIZE(key)) ? 1 :
-                #endif
-                    PyUnicode_Compare(**name, key);
-                if (cmp < 0 && unlikely(PyErr_Occurred())) goto bad;
-                if (cmp == 0) {
-                    values[name-argnames] = value;
-                    break;
-                }
-                name++;
-            }
-            if (*name) continue;
-            else {
-                PyObject*** argname = argnames;
-                while (argname != first_kw_arg) {
-                    int cmp = (**argname == key) ? 0 :
-                    #if !CYTHON_COMPILING_IN_PYPY && PY_MAJOR_VERSION >= 3
-                        (PyUnicode_GET_SIZE(**argname) != PyUnicode_GET_SIZE(key)) ? 1 :
-                    #endif
-                        PyUnicode_Compare(**argname, key);
-                    if (cmp < 0 && unlikely(PyErr_Occurred())) goto bad;
-                    if (cmp == 0) goto arg_passed_twice;
-                    argname++;
-                }
-            }
-        } else
-            goto invalid_keyword_type;
-        if (kwds2) {
-            if (unlikely(PyDict_SetItem(kwds2, key, value))) goto bad;
-        } else {
-            goto invalid_keyword;
-        }
-    }
-    return 0;
-arg_passed_twice:
-    __Pyx_RaiseDoubleKeywordsError(function_name, key);
-    goto bad;
-invalid_keyword_type:
-    PyErr_Format(PyExc_TypeError,
-        "%.200s() keywords must be strings", function_name);
-    goto bad;
-invalid_keyword:
-    PyErr_Format(PyExc_TypeError,
-    #if PY_MAJOR_VERSION < 3
-        "%.200s() got an unexpected keyword argument '%.200s'",
-        function_name, PyString_AsString(key));
-    #else
-        "%s() got an unexpected keyword argument '%U'",
-        function_name, key);
-    #endif
-bad:
-    return -1;
-}
-
-/* RaiseArgTupleInvalid */
-      static void __Pyx_RaiseArgtupleInvalid(
-    const char* func_name,
-    int exact,
-    Py_ssize_t num_min,
-    Py_ssize_t num_max,
-    Py_ssize_t num_found)
-{
-    Py_ssize_t num_expected;
-    const char *more_or_less;
-    if (num_found < num_min) {
-        num_expected = num_min;
-        more_or_less = "at least";
-    } else {
-        num_expected = num_max;
-        more_or_less = "at most";
-    }
-    if (exact) {
-        more_or_less = "exactly";
-    }
-    PyErr_Format(PyExc_TypeError,
-                 "%.200s() takes %.8s %" CYTHON_FORMAT_SSIZE_T "d positional argument%.1s (%" CYTHON_FORMAT_SSIZE_T "d given)",
-                 func_name, more_or_less, num_expected,
-                 (num_expected == 1) ? "" : "s", num_found);
-}
-
-/* WriteUnraisableException */
-      static void __Pyx_WriteUnraisable(const char *name, CYTHON_UNUSED int clineno,
-                                  CYTHON_UNUSED int lineno, CYTHON_UNUSED const char *filename,
-                                  int full_traceback, CYTHON_UNUSED int nogil) {
-    PyObject *old_exc, *old_val, *old_tb;
-    PyObject *ctx;
-    __Pyx_PyThreadState_declare
-#ifdef WITH_THREAD
-    PyGILState_STATE state;
-    if (nogil)
-        state = PyGILState_Ensure();
-#ifdef _MSC_VER
-    else state = (PyGILState_STATE)-1;
-#endif
-#endif
-    __Pyx_PyThreadState_assign
-    __Pyx_ErrFetch(&old_exc, &old_val, &old_tb);
-    if (full_traceback) {
-        Py_XINCREF(old_exc);
-        Py_XINCREF(old_val);
-        Py_XINCREF(old_tb);
-        __Pyx_ErrRestore(old_exc, old_val, old_tb);
-        PyErr_PrintEx(1);
-    }
-    #if PY_MAJOR_VERSION < 3
-    ctx = PyString_FromString(name);
-    #else
-    ctx = PyUnicode_FromString(name);
-    #endif
-    __Pyx_ErrRestore(old_exc, old_val, old_tb);
-    if (!ctx) {
-        PyErr_WriteUnraisable(Py_None);
-    } else {
-        PyErr_WriteUnraisable(ctx);
-        Py_DECREF(ctx);
-    }
-#ifdef WITH_THREAD
-    if (nogil)
-        PyGILState_Release(state);
-#endif
-}
-
-/* SaveResetException */
-      #if CYTHON_FAST_THREAD_STATE
-static CYTHON_INLINE void __Pyx__ExceptionSave(PyThreadState *tstate, PyObject **type, PyObject **value, PyObject **tb) {
-    #if PY_VERSION_HEX >= 0x030700A3
-    *type = tstate->exc_state.exc_type;
-    *value = tstate->exc_state.exc_value;
-    *tb = tstate->exc_state.exc_traceback;
-    #else
-    *type = tstate->exc_type;
-    *value = tstate->exc_value;
-    *tb = tstate->exc_traceback;
-    #endif
-    Py_XINCREF(*type);
-    Py_XINCREF(*value);
-    Py_XINCREF(*tb);
-}
-static CYTHON_INLINE void __Pyx__ExceptionReset(PyThreadState *tstate, PyObject *type, PyObject *value, PyObject *tb) {
-    PyObject *tmp_type, *tmp_value, *tmp_tb;
-    #if PY_VERSION_HEX >= 0x030700A3
-    tmp_type = tstate->exc_state.exc_type;
-    tmp_value = tstate->exc_state.exc_value;
-    tmp_tb = tstate->exc_state.exc_traceback;
-    tstate->exc_state.exc_type = type;
-    tstate->exc_state.exc_value = value;
-    tstate->exc_state.exc_traceback = tb;
-    #else
-    tmp_type = tstate->exc_type;
-    tmp_value = tstate->exc_value;
-    tmp_tb = tstate->exc_traceback;
-    tstate->exc_type = type;
-    tstate->exc_value = value;
-    tstate->exc_traceback = tb;
-    #endif
-    Py_XDECREF(tmp_type);
-    Py_XDECREF(tmp_value);
-    Py_XDECREF(tmp_tb);
-}
-#endif
-
-/* PyErrExceptionMatches */
-      #if CYTHON_FAST_THREAD_STATE
-static int __Pyx_PyErr_ExceptionMatchesTuple(PyObject *exc_type, PyObject *tuple) {
-    Py_ssize_t i, n;
-    n = PyTuple_GET_SIZE(tuple);
-#if PY_MAJOR_VERSION >= 3
-    for (i=0; i<n; i++) {
-        if (exc_type == PyTuple_GET_ITEM(tuple, i)) return 1;
-    }
-#endif
-    for (i=0; i<n; i++) {
-        if (__Pyx_PyErr_GivenExceptionMatches(exc_type, PyTuple_GET_ITEM(tuple, i))) return 1;
-    }
-    return 0;
-}
-static CYTHON_INLINE int __Pyx_PyErr_ExceptionMatchesInState(PyThreadState* tstate, PyObject* err) {
-    PyObject *exc_type = tstate->curexc_type;
-    if (exc_type == err) return 1;
-    if (unlikely(!exc_type)) return 0;
-    if (unlikely(PyTuple_Check(err)))
-        return __Pyx_PyErr_ExceptionMatchesTuple(exc_type, err);
-    return __Pyx_PyErr_GivenExceptionMatches(exc_type, err);
-}
-#endif
-
-/* GetException */
-      #if CYTHON_FAST_THREAD_STATE
-static int __Pyx__GetException(PyThreadState *tstate, PyObject **type, PyObject **value, PyObject **tb) {
-#else
-static int __Pyx_GetException(PyObject **type, PyObject **value, PyObject **tb) {
-#endif
-    PyObject *local_type, *local_value, *local_tb;
-#if CYTHON_FAST_THREAD_STATE
-    PyObject *tmp_type, *tmp_value, *tmp_tb;
-    local_type = tstate->curexc_type;
-    local_value = tstate->curexc_value;
-    local_tb = tstate->curexc_traceback;
-    tstate->curexc_type = 0;
-    tstate->curexc_value = 0;
-    tstate->curexc_traceback = 0;
-#else
-    PyErr_Fetch(&local_type, &local_value, &local_tb);
-#endif
-    PyErr_NormalizeException(&local_type, &local_value, &local_tb);
-#if CYTHON_FAST_THREAD_STATE
-    if (unlikely(tstate->curexc_type))
-#else
-    if (unlikely(PyErr_Occurred()))
-#endif
-        goto bad;
-    #if PY_MAJOR_VERSION >= 3
-    if (local_tb) {
-        if (unlikely(PyException_SetTraceback(local_value, local_tb) < 0))
-            goto bad;
-    }
-    #endif
-    Py_XINCREF(local_tb);
-    Py_XINCREF(local_type);
-    Py_XINCREF(local_value);
-    *type = local_type;
-    *value = local_value;
-    *tb = local_tb;
-#if CYTHON_FAST_THREAD_STATE
-    #if PY_VERSION_HEX >= 0x030700A3
-    tmp_type = tstate->exc_state.exc_type;
-    tmp_value = tstate->exc_state.exc_value;
-    tmp_tb = tstate->exc_state.exc_traceback;
-    tstate->exc_state.exc_type = local_type;
-    tstate->exc_state.exc_value = local_value;
-    tstate->exc_state.exc_traceback = local_tb;
-    #else
-    tmp_type = tstate->exc_type;
-    tmp_value = tstate->exc_value;
-    tmp_tb = tstate->exc_traceback;
-    tstate->exc_type = local_type;
-    tstate->exc_value = local_value;
-    tstate->exc_traceback = local_tb;
-    #endif
-    Py_XDECREF(tmp_type);
-    Py_XDECREF(tmp_value);
-    Py_XDECREF(tmp_tb);
-#else
-    PyErr_SetExcInfo(local_type, local_value, local_tb);
-#endif
-    return 0;
-bad:
-    *type = 0;
-    *value = 0;
-    *tb = 0;
-    Py_XDECREF(local_type);
-    Py_XDECREF(local_value);
-    Py_XDECREF(local_tb);
-    return -1;
-}
-
-/* SwapException */
-        #if CYTHON_FAST_THREAD_STATE
-static CYTHON_INLINE void __Pyx__ExceptionSwap(PyThreadState *tstate, PyObject **type, PyObject **value, PyObject **tb) {
-    PyObject *tmp_type, *tmp_value, *tmp_tb;
-    #if PY_VERSION_HEX >= 0x030700A3
-    tmp_type = tstate->exc_state.exc_type;
-    tmp_value = tstate->exc_state.exc_value;
-    tmp_tb = tstate->exc_state.exc_traceback;
-    tstate->exc_state.exc_type = *type;
-    tstate->exc_state.exc_value = *value;
-    tstate->exc_state.exc_traceback = *tb;
-    #else
-    tmp_type = tstate->exc_type;
-    tmp_value = tstate->exc_value;
-    tmp_tb = tstate->exc_traceback;
-    tstate->exc_type = *type;
-    tstate->exc_value = *value;
-    tstate->exc_traceback = *tb;
-    #endif
-    *type = tmp_type;
-    *value = tmp_value;
-    *tb = tmp_tb;
-}
-#else
-static CYTHON_INLINE void __Pyx_ExceptionSwap(PyObject **type, PyObject **value, PyObject **tb) {
-    PyObject *tmp_type, *tmp_value, *tmp_tb;
-    PyErr_GetExcInfo(&tmp_type, &tmp_value, &tmp_tb);
-    PyErr_SetExcInfo(*type, *value, *tb);
-    *type = tmp_type;
-    *value = tmp_value;
-    *tb = tmp_tb;
-}
-#endif
-
-/* PyUnicode_Unicode */
-        static CYTHON_INLINE PyObject* __Pyx_PyUnicode_Unicode(PyObject *obj) {
-    if (unlikely(obj == Py_None))
-        obj = __pyx_kp_u_None;
-    return __Pyx_NewRef(obj);
-}
-
-/* JoinPyUnicode */
-        static PyObject* __Pyx_PyUnicode_Join(PyObject* value_tuple, Py_ssize_t value_count, Py_ssize_t result_ulength,
-                                      CYTHON_UNUSED Py_UCS4 max_char) {
-#if CYTHON_USE_UNICODE_INTERNALS && CYTHON_ASSUME_SAFE_MACROS && !CYTHON_AVOID_BORROWED_REFS
-    PyObject *result_uval;
-    int result_ukind;
-    Py_ssize_t i, char_pos;
-    void *result_udata;
-#if CYTHON_PEP393_ENABLED
-    result_uval = PyUnicode_New(result_ulength, max_char);
-    if (unlikely(!result_uval)) return NULL;
-    result_ukind = (max_char <= 255) ? PyUnicode_1BYTE_KIND : (max_char <= 65535) ? PyUnicode_2BYTE_KIND : PyUnicode_4BYTE_KIND;
-    result_udata = PyUnicode_DATA(result_uval);
-#else
-    result_uval = PyUnicode_FromUnicode(NULL, result_ulength);
-    if (unlikely(!result_uval)) return NULL;
-    result_ukind = sizeof(Py_UNICODE);
-    result_udata = PyUnicode_AS_UNICODE(result_uval);
-#endif
-    char_pos = 0;
-    for (i=0; i < value_count; i++) {
-        int ukind;
-        Py_ssize_t ulength;
-        void *udata;
-        PyObject *uval = PyTuple_GET_ITEM(value_tuple, i);
-        if (unlikely(__Pyx_PyUnicode_READY(uval)))
-            goto bad;
-        ulength = __Pyx_PyUnicode_GET_LENGTH(uval);
-        if (unlikely(!ulength))
-            continue;
-        if (unlikely(char_pos + ulength < 0))
-            goto overflow;
-        ukind = __Pyx_PyUnicode_KIND(uval);
-        udata = __Pyx_PyUnicode_DATA(uval);
-        if (!CYTHON_PEP393_ENABLED || ukind == result_ukind) {
-            memcpy((char *)result_udata + char_pos * result_ukind, udata, (size_t) (ulength * result_ukind));
-        } else {
-            #if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x030300F0 || defined(_PyUnicode_FastCopyCharacters)
-            _PyUnicode_FastCopyCharacters(result_uval, char_pos, uval, 0, ulength);
-            #else
-            Py_ssize_t j;
-            for (j=0; j < ulength; j++) {
-                Py_UCS4 uchar = __Pyx_PyUnicode_READ(ukind, udata, j);
-                __Pyx_PyUnicode_WRITE(result_ukind, result_udata, char_pos+j, uchar);
-            }
-            #endif
-        }
-        char_pos += ulength;
-    }
-    return result_uval;
-overflow:
-    PyErr_SetString(PyExc_OverflowError, "join() result is too long for a Python string");
-bad:
-    Py_DECREF(result_uval);
-    return NULL;
-#else
-    result_ulength++;
-    value_count++;
-    return PyUnicode_Join(__pyx_empty_unicode, value_tuple);
-#endif
-}
-
-/* FastTypeChecks */
-        #if CYTHON_COMPILING_IN_CPYTHON
-static int __Pyx_InBases(PyTypeObject *a, PyTypeObject *b) {
-    while (a) {
-        a = a->tp_base;
-        if (a == b)
-            return 1;
-    }
-    return b == &PyBaseObject_Type;
-}
-static CYTHON_INLINE int __Pyx_IsSubtype(PyTypeObject *a, PyTypeObject *b) {
-    PyObject *mro;
-    if (a == b) return 1;
-    mro = a->tp_mro;
-    if (likely(mro)) {
-        Py_ssize_t i, n;
-        n = PyTuple_GET_SIZE(mro);
-        for (i = 0; i < n; i++) {
-            if (PyTuple_GET_ITEM(mro, i) == (PyObject *)b)
-                return 1;
-        }
-        return 0;
-    }
-    return __Pyx_InBases(a, b);
-}
-#if PY_MAJOR_VERSION == 2
-static int __Pyx_inner_PyErr_GivenExceptionMatches2(PyObject *err, PyObject* exc_type1, PyObject* exc_type2) {
-    PyObject *exception, *value, *tb;
-    int res;
-    __Pyx_PyThreadState_declare
-    __Pyx_PyThreadState_assign
-    __Pyx_ErrFetch(&exception, &value, &tb);
-    res = exc_type1 ? PyObject_IsSubclass(err, exc_type1) : 0;
-    if (unlikely(res == -1)) {
-        PyErr_WriteUnraisable(err);
-        res = 0;
-    }
-    if (!res) {
-        res = PyObject_IsSubclass(err, exc_type2);
-        if (unlikely(res == -1)) {
-            PyErr_WriteUnraisable(err);
-            res = 0;
-        }
-    }
-    __Pyx_ErrRestore(exception, value, tb);
-    return res;
-}
-#else
-static CYTHON_INLINE int __Pyx_inner_PyErr_GivenExceptionMatches2(PyObject *err, PyObject* exc_type1, PyObject *exc_type2) {
-    int res = exc_type1 ? __Pyx_IsSubtype((PyTypeObject*)err, (PyTypeObject*)exc_type1) : 0;
-    if (!res) {
-        res = __Pyx_IsSubtype((PyTypeObject*)err, (PyTypeObject*)exc_type2);
-    }
-    return res;
-}
-#endif
-static int __Pyx_PyErr_GivenExceptionMatchesTuple(PyObject *exc_type, PyObject *tuple) {
-    Py_ssize_t i, n;
-    assert(PyExceptionClass_Check(exc_type));
-    n = PyTuple_GET_SIZE(tuple);
-#if PY_MAJOR_VERSION >= 3
-    for (i=0; i<n; i++) {
-        if (exc_type == PyTuple_GET_ITEM(tuple, i)) return 1;
-    }
-#endif
-    for (i=0; i<n; i++) {
-        PyObject *t = PyTuple_GET_ITEM(tuple, i);
-        #if PY_MAJOR_VERSION < 3
-        if (likely(exc_type == t)) return 1;
-        #endif
-        if (likely(PyExceptionClass_Check(t))) {
-            if (__Pyx_inner_PyErr_GivenExceptionMatches2(exc_type, NULL, t)) return 1;
-        } else {
-        }
-    }
-    return 0;
-}
-static CYTHON_INLINE int __Pyx_PyErr_GivenExceptionMatches(PyObject *err, PyObject* exc_type) {
-    if (likely(err == exc_type)) return 1;
-    if (likely(PyExceptionClass_Check(err))) {
-        if (likely(PyExceptionClass_Check(exc_type))) {
-            return __Pyx_inner_PyErr_GivenExceptionMatches2(err, NULL, exc_type);
-        } else if (likely(PyTuple_Check(exc_type))) {
-            return __Pyx_PyErr_GivenExceptionMatchesTuple(err, exc_type);
-        } else {
-        }
-    }
-    return PyErr_GivenExceptionMatches(err, exc_type);
-}
-static CYTHON_INLINE int __Pyx_PyErr_GivenExceptionMatches2(PyObject *err, PyObject *exc_type1, PyObject *exc_type2) {
-    assert(PyExceptionClass_Check(exc_type1));
-    assert(PyExceptionClass_Check(exc_type2));
-    if (likely(err == exc_type1 || err == exc_type2)) return 1;
-    if (likely(PyExceptionClass_Check(err))) {
-        return __Pyx_inner_PyErr_GivenExceptionMatches2(err, exc_type1, exc_type2);
-    }
-    return (PyErr_GivenExceptionMatches(err, exc_type1) || PyErr_GivenExceptionMatches(err, exc_type2));
-}
-#endif
-
-/* PyObjectSetAttrStr */
-        #if CYTHON_USE_TYPE_SLOTS
-static CYTHON_INLINE int __Pyx_PyObject_SetAttrStr(PyObject* obj, PyObject* attr_name, PyObject* value) {
-    PyTypeObject* tp = Py_TYPE(obj);
-    if (likely(tp->tp_setattro))
-        return tp->tp_setattro(obj, attr_name, value);
-#if PY_MAJOR_VERSION < 3
-    if (likely(tp->tp_setattr))
-        return tp->tp_setattr(obj, PyString_AS_STRING(attr_name), value);
-#endif
-    return PyObject_SetAttr(obj, attr_name, value);
-}
-#endif
-
-/* PyIntBinop */
-        #if !CYTHON_COMPILING_IN_PYPY
-static PyObject* __Pyx_PyInt_AddObjC(PyObject *op1, PyObject *op2, CYTHON_UNUSED long intval, CYTHON_UNUSED int inplace) {
-    #if PY_MAJOR_VERSION < 3
-    if (likely(PyInt_CheckExact(op1))) {
-        const long b = intval;
-        long x;
-        long a = PyInt_AS_LONG(op1);
-            x = (long)((unsigned long)a + b);
-            if (likely((x^a) >= 0 || (x^b) >= 0))
-                return PyInt_FromLong(x);
-            return PyLong_Type.tp_as_number->nb_add(op1, op2);
-    }
-    #endif
-    #if CYTHON_USE_PYLONG_INTERNALS
-    if (likely(PyLong_CheckExact(op1))) {
-        const long b = intval;
-        long a, x;
-#ifdef HAVE_LONG_LONG
-        const PY_LONG_LONG llb = intval;
-        PY_LONG_LONG lla, llx;
-#endif
-        const digit* digits = ((PyLongObject*)op1)->ob_digit;
-        const Py_ssize_t size = Py_SIZE(op1);
-        if (likely(__Pyx_sst_abs(size) <= 1)) {
-            a = likely(size) ? digits[0] : 0;
-            if (size == -1) a = -a;
-        } else {
-            switch (size) {
-                case -2:
-                    if (8 * sizeof(long) - 1 > 2 * PyLong_SHIFT) {
-                        a = -(long) (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0]));
-                        break;
-#ifdef HAVE_LONG_LONG
-                    } else if (8 * sizeof(PY_LONG_LONG) - 1 > 2 * PyLong_SHIFT) {
-                        lla = -(PY_LONG_LONG) (((((unsigned PY_LONG_LONG)digits[1]) << PyLong_SHIFT) | (unsigned PY_LONG_LONG)digits[0]));
-                        goto long_long;
-#endif
-                    }
-                    CYTHON_FALLTHROUGH;
-                case 2:
-                    if (8 * sizeof(long) - 1 > 2 * PyLong_SHIFT) {
-                        a = (long) (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0]));
-                        break;
-#ifdef HAVE_LONG_LONG
-                    } else if (8 * sizeof(PY_LONG_LONG) - 1 > 2 * PyLong_SHIFT) {
-                        lla = (PY_LONG_LONG) (((((unsigned PY_LONG_LONG)digits[1]) << PyLong_SHIFT) | (unsigned PY_LONG_LONG)digits[0]));
-                        goto long_long;
-#endif
-                    }
-                    CYTHON_FALLTHROUGH;
-                case -3:
-                    if (8 * sizeof(long) - 1 > 3 * PyLong_SHIFT) {
-                        a = -(long) (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0]));
-                        break;
-#ifdef HAVE_LONG_LONG
-                    } else if (8 * sizeof(PY_LONG_LONG) - 1 > 3 * PyLong_SHIFT) {
-                        lla = -(PY_LONG_LONG) (((((((unsigned PY_LONG_LONG)digits[2]) << PyLong_SHIFT) | (unsigned PY_LONG_LONG)digits[1]) << PyLong_SHIFT) | (unsigned PY_LONG_LONG)digits[0]));
-                        goto long_long;
-#endif
-                    }
-                    CYTHON_FALLTHROUGH;
-                case 3:
-                    if (8 * sizeof(long) - 1 > 3 * PyLong_SHIFT) {
-                        a = (long) (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0]));
-                        break;
-#ifdef HAVE_LONG_LONG
-                    } else if (8 * sizeof(PY_LONG_LONG) - 1 > 3 * PyLong_SHIFT) {
-                        lla = (PY_LONG_LONG) (((((((unsigned PY_LONG_LONG)digits[2]) << PyLong_SHIFT) | (unsigned PY_LONG_LONG)digits[1]) << PyLong_SHIFT) | (unsigned PY_LONG_LONG)digits[0]));
-                        goto long_long;
-#endif
-                    }
-                    CYTHON_FALLTHROUGH;
-                case -4:
-                    if (8 * sizeof(long) - 1 > 4 * PyLong_SHIFT) {
-                        a = -(long) (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0]));
-                        break;
-#ifdef HAVE_LONG_LONG
-                    } else if (8 * sizeof(PY_LONG_LONG) - 1 > 4 * PyLong_SHIFT) {
-                        lla = -(PY_LONG_LONG) (((((((((unsigned PY_LONG_LONG)digits[3]) << PyLong_SHIFT) | (unsigned PY_LONG_LONG)digits[2]) << PyLong_SHIFT) | (unsigned PY_LONG_LONG)digits[1]) << PyLong_SHIFT) | (unsigned PY_LONG_LONG)digits[0]));
-                        goto long_long;
-#endif
-                    }
-                    CYTHON_FALLTHROUGH;
-                case 4:
-                    if (8 * sizeof(long) - 1 > 4 * PyLong_SHIFT) {
-                        a = (long) (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0]));
-                        break;
-#ifdef HAVE_LONG_LONG
-                    } else if (8 * sizeof(PY_LONG_LONG) - 1 > 4 * PyLong_SHIFT) {
-                        lla = (PY_LONG_LONG) (((((((((unsigned PY_LONG_LONG)digits[3]) << PyLong_SHIFT) | (unsigned PY_LONG_LONG)digits[2]) << PyLong_SHIFT) | (unsigned PY_LONG_LONG)digits[1]) << PyLong_SHIFT) | (unsigned PY_LONG_LONG)digits[0]));
-                        goto long_long;
-#endif
-                    }
-                    CYTHON_FALLTHROUGH;
-                default: return PyLong_Type.tp_as_number->nb_add(op1, op2);
-            }
-        }
-                x = a + b;
-            return PyLong_FromLong(x);
-#ifdef HAVE_LONG_LONG
-        long_long:
-                llx = lla + llb;
-            return PyLong_FromLongLong(llx);
-#endif
-        
-        
-    }
-    #endif
-    if (PyFloat_CheckExact(op1)) {
-        const long b = intval;
-        double a = PyFloat_AS_DOUBLE(op1);
-            double result;
-            PyFPE_START_PROTECT("add", return NULL)
-            result = ((double)a) + (double)b;
-            PyFPE_END_PROTECT(result)
-            return PyFloat_FromDouble(result);
-    }
-    return (inplace ? PyNumber_InPlaceAdd : PyNumber_Add)(op1, op2);
-}
-#endif
-
-/* DictGetItem */
-        #if PY_MAJOR_VERSION >= 3 && !CYTHON_COMPILING_IN_PYPY
-static PyObject *__Pyx_PyDict_GetItem(PyObject *d, PyObject* key) {
-    PyObject *value;
-    value = PyDict_GetItemWithError(d, key);
-    if (unlikely(!value)) {
-        if (!PyErr_Occurred()) {
-            PyObject* args = PyTuple_Pack(1, key);
-            if (likely(args))
-                PyErr_SetObject(PyExc_KeyError, args);
-            Py_XDECREF(args);
-        }
-        return NULL;
-    }
-    Py_INCREF(value);
-    return value;
-}
-#endif
-
-/* PyObject_GenericGetAttrNoDict */
-        #if CYTHON_USE_TYPE_SLOTS && CYTHON_USE_PYTYPE_LOOKUP && PY_VERSION_HEX < 0x03070000
-static PyObject *__Pyx_RaiseGenericGetAttributeError(PyTypeObject *tp, PyObject *attr_name) {
-    PyErr_Format(PyExc_AttributeError,
-#if PY_MAJOR_VERSION >= 3
-                 "'%.50s' object has no attribute '%U'",
-                 tp->tp_name, attr_name);
-#else
-                 "'%.50s' object has no attribute '%.400s'",
-                 tp->tp_name, PyString_AS_STRING(attr_name));
-#endif
-    return NULL;
-}
-static CYTHON_INLINE PyObject* __Pyx_PyObject_GenericGetAttrNoDict(PyObject* obj, PyObject* attr_name) {
-    PyObject *descr;
-    PyTypeObject *tp = Py_TYPE(obj);
-    if (unlikely(!PyString_Check(attr_name))) {
-        return PyObject_GenericGetAttr(obj, attr_name);
-    }
-    assert(!tp->tp_dictoffset);
-    descr = _PyType_Lookup(tp, attr_name);
-    if (unlikely(!descr)) {
-        return __Pyx_RaiseGenericGetAttributeError(tp, attr_name);
-    }
-    Py_INCREF(descr);
-    #if PY_MAJOR_VERSION < 3
-    if (likely(PyType_HasFeature(Py_TYPE(descr), Py_TPFLAGS_HAVE_CLASS)))
-    #endif
-    {
-        descrgetfunc f = Py_TYPE(descr)->tp_descr_get;
-        if (unlikely(f)) {
-            PyObject *res = f(descr, obj, (PyObject *)tp);
-            Py_DECREF(descr);
-            return res;
-        }
-    }
-    return descr;
-}
-#endif
-
-/* PyObject_GenericGetAttr */
-        #if CYTHON_USE_TYPE_SLOTS && CYTHON_USE_PYTYPE_LOOKUP && PY_VERSION_HEX < 0x03070000
-static PyObject* __Pyx_PyObject_GenericGetAttr(PyObject* obj, PyObject* attr_name) {
-    if (unlikely(Py_TYPE(obj)->tp_dictoffset)) {
-        return PyObject_GenericGetAttr(obj, attr_name);
-    }
-    return __Pyx_PyObject_GenericGetAttrNoDict(obj, attr_name);
-}
-#endif
-
-/* SetVTable */
-        static int __Pyx_SetVtable(PyObject *dict, void *vtable) {
-#if PY_VERSION_HEX >= 0x02070000
-    PyObject *ob = PyCapsule_New(vtable, 0, 0);
-#else
-    PyObject *ob = PyCObject_FromVoidPtr(vtable, 0);
-#endif
-    if (!ob)
-        goto bad;
-    if (PyDict_SetItem(dict, __pyx_n_s_pyx_vtable, ob) < 0)
-        goto bad;
-    Py_DECREF(ob);
-    return 0;
-bad:
-    Py_XDECREF(ob);
-    return -1;
-}
-
-/* SetupReduce */
-        static int __Pyx_setup_reduce_is_named(PyObject* meth, PyObject* name) {
-  int ret;
-  PyObject *name_attr;
-  name_attr = __Pyx_PyObject_GetAttrStr(meth, __pyx_n_s_name);
-  if (likely(name_attr)) {
-      ret = PyObject_RichCompareBool(name_attr, name, Py_EQ);
-  } else {
-      ret = -1;
-  }
-  if (unlikely(ret < 0)) {
-      PyErr_Clear();
-      ret = 0;
-  }
-  Py_XDECREF(name_attr);
-  return ret;
-}
-static int __Pyx_setup_reduce(PyObject* type_obj) {
-    int ret = 0;
-    PyObject *object_reduce = NULL;
-    PyObject *object_reduce_ex = NULL;
-    PyObject *reduce = NULL;
-    PyObject *reduce_ex = NULL;
-    PyObject *reduce_cython = NULL;
-    PyObject *setstate = NULL;
-    PyObject *setstate_cython = NULL;
-#if CYTHON_USE_PYTYPE_LOOKUP
-    if (_PyType_Lookup((PyTypeObject*)type_obj, __pyx_n_s_getstate)) goto GOOD;
-#else
-    if (PyObject_HasAttr(type_obj, __pyx_n_s_getstate)) goto GOOD;
-#endif
-#if CYTHON_USE_PYTYPE_LOOKUP
-    object_reduce_ex = _PyType_Lookup(&PyBaseObject_Type, __pyx_n_s_reduce_ex); if (!object_reduce_ex) goto BAD;
-#else
-    object_reduce_ex = __Pyx_PyObject_GetAttrStr((PyObject*)&PyBaseObject_Type, __pyx_n_s_reduce_ex); if (!object_reduce_ex) goto BAD;
-#endif
-    reduce_ex = __Pyx_PyObject_GetAttrStr(type_obj, __pyx_n_s_reduce_ex); if (unlikely(!reduce_ex)) goto BAD;
-    if (reduce_ex == object_reduce_ex) {
-#if CYTHON_USE_PYTYPE_LOOKUP
-        object_reduce = _PyType_Lookup(&PyBaseObject_Type, __pyx_n_s_reduce); if (!object_reduce) goto BAD;
-#else
-        object_reduce = __Pyx_PyObject_GetAttrStr((PyObject*)&PyBaseObject_Type, __pyx_n_s_reduce); if (!object_reduce) goto BAD;
-#endif
-        reduce = __Pyx_PyObject_GetAttrStr(type_obj, __pyx_n_s_reduce); if (unlikely(!reduce)) goto BAD;
-        if (reduce == object_reduce || __Pyx_setup_reduce_is_named(reduce, __pyx_n_s_reduce_cython)) {
-            reduce_cython = __Pyx_PyObject_GetAttrStr(type_obj, __pyx_n_s_reduce_cython); if (unlikely(!reduce_cython)) goto BAD;
-            ret = PyDict_SetItem(((PyTypeObject*)type_obj)->tp_dict, __pyx_n_s_reduce, reduce_cython); if (unlikely(ret < 0)) goto BAD;
-            ret = PyDict_DelItem(((PyTypeObject*)type_obj)->tp_dict, __pyx_n_s_reduce_cython); if (unlikely(ret < 0)) goto BAD;
-            setstate = __Pyx_PyObject_GetAttrStr(type_obj, __pyx_n_s_setstate);
-            if (!setstate) PyErr_Clear();
-            if (!setstate || __Pyx_setup_reduce_is_named(setstate, __pyx_n_s_setstate_cython)) {
-                setstate_cython = __Pyx_PyObject_GetAttrStr(type_obj, __pyx_n_s_setstate_cython); if (unlikely(!setstate_cython)) goto BAD;
-                ret = PyDict_SetItem(((PyTypeObject*)type_obj)->tp_dict, __pyx_n_s_setstate, setstate_cython); if (unlikely(ret < 0)) goto BAD;
-                ret = PyDict_DelItem(((PyTypeObject*)type_obj)->tp_dict, __pyx_n_s_setstate_cython); if (unlikely(ret < 0)) goto BAD;
-            }
-            PyType_Modified((PyTypeObject*)type_obj);
-        }
-    }
-    goto GOOD;
-BAD:
-    if (!PyErr_Occurred())
-        PyErr_Format(PyExc_RuntimeError, "Unable to initialize pickling for %s", ((PyTypeObject*)type_obj)->tp_name);
-    ret = -1;
-GOOD:
-#if !CYTHON_USE_PYTYPE_LOOKUP
-    Py_XDECREF(object_reduce);
-    Py_XDECREF(object_reduce_ex);
-#endif
-    Py_XDECREF(reduce);
-    Py_XDECREF(reduce_ex);
-    Py_XDECREF(reduce_cython);
-    Py_XDECREF(setstate);
-    Py_XDECREF(setstate_cython);
-    return ret;
-}
-
-/* Import */
-        static PyObject *__Pyx_Import(PyObject *name, PyObject *from_list, int level) {
-    PyObject *empty_list = 0;
-    PyObject *module = 0;
-    PyObject *global_dict = 0;
-    PyObject *empty_dict = 0;
-    PyObject *list;
-    #if PY_MAJOR_VERSION < 3
-    PyObject *py_import;
-    py_import = __Pyx_PyObject_GetAttrStr(__pyx_b, __pyx_n_s_import);
-    if (!py_import)
-        goto bad;
-    #endif
-    if (from_list)
-        list = from_list;
-    else {
-        empty_list = PyList_New(0);
-        if (!empty_list)
-            goto bad;
-        list = empty_list;
-    }
-    global_dict = PyModule_GetDict(__pyx_m);
-    if (!global_dict)
-        goto bad;
-    empty_dict = PyDict_New();
-    if (!empty_dict)
-        goto bad;
-    {
-        #if PY_MAJOR_VERSION >= 3
-        if (level == -1) {
-            if (strchr(__Pyx_MODULE_NAME, '.')) {
-                module = PyImport_ImportModuleLevelObject(
-                    name, global_dict, empty_dict, list, 1);
-                if (!module) {
-                    if (!PyErr_ExceptionMatches(PyExc_ImportError))
-                        goto bad;
-                    PyErr_Clear();
-                }
-            }
-            level = 0;
-        }
-        #endif
-        if (!module) {
-            #if PY_MAJOR_VERSION < 3
-            PyObject *py_level = PyInt_FromLong(level);
-            if (!py_level)
-                goto bad;
-            module = PyObject_CallFunctionObjArgs(py_import,
-                name, global_dict, empty_dict, list, py_level, NULL);
-            Py_DECREF(py_level);
-            #else
-            module = PyImport_ImportModuleLevelObject(
-                name, global_dict, empty_dict, list, level);
-            #endif
-        }
-    }
-bad:
-    #if PY_MAJOR_VERSION < 3
-    Py_XDECREF(py_import);
-    #endif
-    Py_XDECREF(empty_list);
-    Py_XDECREF(empty_dict);
-    return module;
-}
-
-/* ImportFrom */
-        static PyObject* __Pyx_ImportFrom(PyObject* module, PyObject* name) {
-    PyObject* value = __Pyx_PyObject_GetAttrStr(module, name);
-    if (unlikely(!value) && PyErr_ExceptionMatches(PyExc_AttributeError)) {
-        PyErr_Format(PyExc_ImportError,
-        #if PY_MAJOR_VERSION < 3
-            "cannot import name %.230s", PyString_AS_STRING(name));
-        #else
-            "cannot import name %S", name);
-        #endif
-    }
-    return value;
-}
-
-/* CalculateMetaclass */
-        static PyObject *__Pyx_CalculateMetaclass(PyTypeObject *metaclass, PyObject *bases) {
-    Py_ssize_t i, nbases = PyTuple_GET_SIZE(bases);
-    for (i=0; i < nbases; i++) {
-        PyTypeObject *tmptype;
-        PyObject *tmp = PyTuple_GET_ITEM(bases, i);
-        tmptype = Py_TYPE(tmp);
-#if PY_MAJOR_VERSION < 3
-        if (tmptype == &PyClass_Type)
-            continue;
-#endif
-        if (!metaclass) {
-            metaclass = tmptype;
-            continue;
-        }
-        if (PyType_IsSubtype(metaclass, tmptype))
-            continue;
-        if (PyType_IsSubtype(tmptype, metaclass)) {
-            metaclass = tmptype;
-            continue;
-        }
-        PyErr_SetString(PyExc_TypeError,
-                        "metaclass conflict: "
-                        "the metaclass of a derived class "
-                        "must be a (non-strict) subclass "
-                        "of the metaclasses of all its bases");
-        return NULL;
-    }
-    if (!metaclass) {
-#if PY_MAJOR_VERSION < 3
-        metaclass = &PyClass_Type;
-#else
-        metaclass = &PyType_Type;
-#endif
-    }
-    Py_INCREF((PyObject*) metaclass);
-    return (PyObject*) metaclass;
-}
-
-/* Py3ClassCreate */
-        static PyObject *__Pyx_Py3MetaclassPrepare(PyObject *metaclass, PyObject *bases, PyObject *name,
-                                           PyObject *qualname, PyObject *mkw, PyObject *modname, PyObject *doc) {
-    PyObject *ns;
-    if (metaclass) {
-        PyObject *prep = __Pyx_PyObject_GetAttrStr(metaclass, __pyx_n_s_prepare);
-        if (prep) {
-            PyObject *pargs = PyTuple_Pack(2, name, bases);
-            if (unlikely(!pargs)) {
-                Py_DECREF(prep);
-                return NULL;
-            }
-            ns = PyObject_Call(prep, pargs, mkw);
-            Py_DECREF(prep);
-            Py_DECREF(pargs);
-        } else {
-            if (unlikely(!PyErr_ExceptionMatches(PyExc_AttributeError)))
-                return NULL;
-            PyErr_Clear();
-            ns = PyDict_New();
-        }
-    } else {
-        ns = PyDict_New();
-    }
-    if (unlikely(!ns))
-        return NULL;
-    if (unlikely(PyObject_SetItem(ns, __pyx_n_s_module, modname) < 0)) goto bad;
-    if (unlikely(PyObject_SetItem(ns, __pyx_n_s_qualname, qualname) < 0)) goto bad;
-    if (unlikely(doc && PyObject_SetItem(ns, __pyx_n_s_doc, doc) < 0)) goto bad;
-    return ns;
-bad:
-    Py_DECREF(ns);
-    return NULL;
-}
-static PyObject *__Pyx_Py3ClassCreate(PyObject *metaclass, PyObject *name, PyObject *bases,
-                                      PyObject *dict, PyObject *mkw,
-                                      int calculate_metaclass, int allow_py2_metaclass) {
-    PyObject *result, *margs;
-    PyObject *owned_metaclass = NULL;
-    if (allow_py2_metaclass) {
-        owned_metaclass = PyObject_GetItem(dict, __pyx_n_s_metaclass);
-        if (owned_metaclass) {
-            metaclass = owned_metaclass;
-        } else if (likely(PyErr_ExceptionMatches(PyExc_KeyError))) {
-            PyErr_Clear();
-        } else {
-            return NULL;
-        }
-    }
-    if (calculate_metaclass && (!metaclass || PyType_Check(metaclass))) {
-        metaclass = __Pyx_CalculateMetaclass((PyTypeObject*) metaclass, bases);
-        Py_XDECREF(owned_metaclass);
-        if (unlikely(!metaclass))
-            return NULL;
-        owned_metaclass = metaclass;
-    }
-    margs = PyTuple_Pack(3, name, bases, dict);
-    if (unlikely(!margs)) {
-        result = NULL;
-    } else {
-        result = PyObject_Call(metaclass, margs, mkw);
-        Py_DECREF(margs);
-    }
-    Py_XDECREF(owned_metaclass);
-    return result;
-}
-
-/* GetNameInClass */
-        static PyObject *__Pyx_GetGlobalNameAfterAttributeLookup(PyObject *name) {
-    __Pyx_PyThreadState_declare
-    __Pyx_PyThreadState_assign
-    if (unlikely(!__Pyx_PyErr_ExceptionMatches(PyExc_AttributeError)))
-        return NULL;
-    __Pyx_PyErr_Clear();
-    return __Pyx_GetModuleGlobalName(name);
-}
-static PyObject *__Pyx_GetNameInClass(PyObject *nmspace, PyObject *name) {
-    PyObject *result;
-    result = __Pyx_PyObject_GetAttrStr(nmspace, name);
-    if (!result) {
-        result = __Pyx_GetGlobalNameAfterAttributeLookup(name);
-    }
-    return result;
-}
-
-/* CLineInTraceback */
-        #ifndef CYTHON_CLINE_IN_TRACEBACK
-static int __Pyx_CLineForTraceback(CYTHON_UNUSED PyThreadState *tstate, int c_line) {
-    PyObject *use_cline;
-    PyObject *ptype, *pvalue, *ptraceback;
-#if CYTHON_COMPILING_IN_CPYTHON
-    PyObject **cython_runtime_dict;
-#endif
-    if (unlikely(!__pyx_cython_runtime)) {
-        return c_line;
-    }
-    __Pyx_ErrFetchInState(tstate, &ptype, &pvalue, &ptraceback);
-#if CYTHON_COMPILING_IN_CPYTHON
-    cython_runtime_dict = _PyObject_GetDictPtr(__pyx_cython_runtime);
-    if (likely(cython_runtime_dict)) {
-      use_cline = __Pyx_PyDict_GetItemStr(*cython_runtime_dict, __pyx_n_s_cline_in_traceback);
-    } else
-#endif
-    {
-      PyObject *use_cline_obj = __Pyx_PyObject_GetAttrStr(__pyx_cython_runtime, __pyx_n_s_cline_in_traceback);
-      if (use_cline_obj) {
-        use_cline = PyObject_Not(use_cline_obj) ? Py_False : Py_True;
-        Py_DECREF(use_cline_obj);
-      } else {
-        PyErr_Clear();
-        use_cline = NULL;
-      }
-    }
-    if (!use_cline) {
-        c_line = 0;
-        PyObject_SetAttr(__pyx_cython_runtime, __pyx_n_s_cline_in_traceback, Py_False);
-    }
-    else if (PyObject_Not(use_cline) != 0) {
-        c_line = 0;
-    }
-    __Pyx_ErrRestoreInState(tstate, ptype, pvalue, ptraceback);
-    return c_line;
-}
-#endif
-
-/* CodeObjectCache */
-        static int __pyx_bisect_code_objects(__Pyx_CodeObjectCacheEntry* entries, int count, int code_line) {
-    int start = 0, mid = 0, end = count - 1;
-    if (end >= 0 && code_line > entries[end].code_line) {
-        return count;
-    }
-    while (start < end) {
-        mid = start + (end - start) / 2;
-        if (code_line < entries[mid].code_line) {
-            end = mid;
-        } else if (code_line > entries[mid].code_line) {
-             start = mid + 1;
-        } else {
-            return mid;
-        }
-    }
-    if (code_line <= entries[mid].code_line) {
-        return mid;
-    } else {
-        return mid + 1;
-    }
-}
-static PyCodeObject *__pyx_find_code_object(int code_line) {
-    PyCodeObject* code_object;
-    int pos;
-    if (unlikely(!code_line) || unlikely(!__pyx_code_cache.entries)) {
-        return NULL;
-    }
-    pos = __pyx_bisect_code_objects(__pyx_code_cache.entries, __pyx_code_cache.count, code_line);
-    if (unlikely(pos >= __pyx_code_cache.count) || unlikely(__pyx_code_cache.entries[pos].code_line != code_line)) {
-        return NULL;
-    }
-    code_object = __pyx_code_cache.entries[pos].code_object;
-    Py_INCREF(code_object);
-    return code_object;
-}
-static void __pyx_insert_code_object(int code_line, PyCodeObject* code_object) {
-    int pos, i;
-    __Pyx_CodeObjectCacheEntry* entries = __pyx_code_cache.entries;
-    if (unlikely(!code_line)) {
-        return;
-    }
-    if (unlikely(!entries)) {
-        entries = (__Pyx_CodeObjectCacheEntry*)PyMem_Malloc(64*sizeof(__Pyx_CodeObjectCacheEntry));
-        if (likely(entries)) {
-            __pyx_code_cache.entries = entries;
-            __pyx_code_cache.max_count = 64;
-            __pyx_code_cache.count = 1;
-            entries[0].code_line = code_line;
-            entries[0].code_object = code_object;
-            Py_INCREF(code_object);
-        }
-        return;
-    }
-    pos = __pyx_bisect_code_objects(__pyx_code_cache.entries, __pyx_code_cache.count, code_line);
-    if ((pos < __pyx_code_cache.count) && unlikely(__pyx_code_cache.entries[pos].code_line == code_line)) {
-        PyCodeObject* tmp = entries[pos].code_object;
-        entries[pos].code_object = code_object;
-        Py_DECREF(tmp);
-        return;
-    }
-    if (__pyx_code_cache.count == __pyx_code_cache.max_count) {
-        int new_max = __pyx_code_cache.max_count + 64;
-        entries = (__Pyx_CodeObjectCacheEntry*)PyMem_Realloc(
-            __pyx_code_cache.entries, (size_t)new_max*sizeof(__Pyx_CodeObjectCacheEntry));
-        if (unlikely(!entries)) {
-            return;
-        }
-        __pyx_code_cache.entries = entries;
-        __pyx_code_cache.max_count = new_max;
-    }
-    for (i=__pyx_code_cache.count; i>pos; i--) {
-        entries[i] = entries[i-1];
-    }
-    entries[pos].code_line = code_line;
-    entries[pos].code_object = code_object;
-    __pyx_code_cache.count++;
-    Py_INCREF(code_object);
-}
-
-/* AddTraceback */
-        #include "compile.h"
-#include "frameobject.h"
-#include "traceback.h"
-static PyCodeObject* __Pyx_CreateCodeObjectForTraceback(
-            const char *funcname, int c_line,
-            int py_line, const char *filename) {
-    PyCodeObject *py_code = 0;
-    PyObject *py_srcfile = 0;
-    PyObject *py_funcname = 0;
-    #if PY_MAJOR_VERSION < 3
-    py_srcfile = PyString_FromString(filename);
-    #else
-    py_srcfile = PyUnicode_FromString(filename);
-    #endif
-    if (!py_srcfile) goto bad;
-    if (c_line) {
-        #if PY_MAJOR_VERSION < 3
-        py_funcname = PyString_FromFormat( "%s (%s:%d)", funcname, __pyx_cfilenm, c_line);
-        #else
-        py_funcname = PyUnicode_FromFormat( "%s (%s:%d)", funcname, __pyx_cfilenm, c_line);
-        #endif
-    }
-    else {
-        #if PY_MAJOR_VERSION < 3
-        py_funcname = PyString_FromString(funcname);
-        #else
-        py_funcname = PyUnicode_FromString(funcname);
-        #endif
-    }
-    if (!py_funcname) goto bad;
-    py_code = __Pyx_PyCode_New(
-        0,
-        0,
-        0,
-        0,
-        0,
-        __pyx_empty_bytes, /*PyObject *code,*/
-        __pyx_empty_tuple, /*PyObject *consts,*/
-        __pyx_empty_tuple, /*PyObject *names,*/
-        __pyx_empty_tuple, /*PyObject *varnames,*/
-        __pyx_empty_tuple, /*PyObject *freevars,*/
-        __pyx_empty_tuple, /*PyObject *cellvars,*/
-        py_srcfile,   /*PyObject *filename,*/
-        py_funcname,  /*PyObject *name,*/
-        py_line,
-        __pyx_empty_bytes  /*PyObject *lnotab*/
-    );
-    Py_DECREF(py_srcfile);
-    Py_DECREF(py_funcname);
-    return py_code;
-bad:
-    Py_XDECREF(py_srcfile);
-    Py_XDECREF(py_funcname);
-    return NULL;
-}
-static void __Pyx_AddTraceback(const char *funcname, int c_line,
-                               int py_line, const char *filename) {
-    PyCodeObject *py_code = 0;
-    PyFrameObject *py_frame = 0;
-    PyThreadState *tstate = __Pyx_PyThreadState_Current;
-    if (c_line) {
-        c_line = __Pyx_CLineForTraceback(tstate, c_line);
-    }
-    py_code = __pyx_find_code_object(c_line ? -c_line : py_line);
-    if (!py_code) {
-        py_code = __Pyx_CreateCodeObjectForTraceback(
-            funcname, c_line, py_line, filename);
-        if (!py_code) goto bad;
-        __pyx_insert_code_object(c_line ? -c_line : py_line, py_code);
-    }
-    py_frame = PyFrame_New(
-        tstate,            /*PyThreadState *tstate,*/
-        py_code,           /*PyCodeObject *code,*/
-        __pyx_d,    /*PyObject *globals,*/
-        0                  /*PyObject *locals*/
-    );
-    if (!py_frame) goto bad;
-    __Pyx_PyFrame_SetLineNumber(py_frame, py_line);
-    PyTraceBack_Here(py_frame);
-bad:
-    Py_XDECREF(py_code);
-    Py_XDECREF(py_frame);
-}
-
-/* CIntToPy */
-        static CYTHON_INLINE PyObject* __Pyx_PyInt_From_int(int value) {
-    const int neg_one = (int) -1, const_zero = (int) 0;
-    const int is_unsigned = neg_one > const_zero;
-    if (is_unsigned) {
-        if (sizeof(int) < sizeof(long)) {
-            return PyInt_FromLong((long) value);
-        } else if (sizeof(int) <= sizeof(unsigned long)) {
-            return PyLong_FromUnsignedLong((unsigned long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(int) <= sizeof(unsigned PY_LONG_LONG)) {
-            return PyLong_FromUnsignedLongLong((unsigned PY_LONG_LONG) value);
-#endif
-        }
-    } else {
-        if (sizeof(int) <= sizeof(long)) {
-            return PyInt_FromLong((long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(int) <= sizeof(PY_LONG_LONG)) {
-            return PyLong_FromLongLong((PY_LONG_LONG) value);
-#endif
-        }
-    }
-    {
-        int one = 1; int little = (int)*(unsigned char *)&one;
-        unsigned char *bytes = (unsigned char *)&value;
-        return _PyLong_FromByteArray(bytes, sizeof(int),
-                                     little, !is_unsigned);
-    }
-}
-
-/* CIntToPy */
-        static CYTHON_INLINE PyObject* __Pyx_PyInt_From_unsigned_int(unsigned int value) {
-    const unsigned int neg_one = (unsigned int) -1, const_zero = (unsigned int) 0;
-    const int is_unsigned = neg_one > const_zero;
-    if (is_unsigned) {
-        if (sizeof(unsigned int) < sizeof(long)) {
-            return PyInt_FromLong((long) value);
-        } else if (sizeof(unsigned int) <= sizeof(unsigned long)) {
-            return PyLong_FromUnsignedLong((unsigned long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(unsigned int) <= sizeof(unsigned PY_LONG_LONG)) {
-            return PyLong_FromUnsignedLongLong((unsigned PY_LONG_LONG) value);
-#endif
-        }
-    } else {
-        if (sizeof(unsigned int) <= sizeof(long)) {
-            return PyInt_FromLong((long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(unsigned int) <= sizeof(PY_LONG_LONG)) {
-            return PyLong_FromLongLong((PY_LONG_LONG) value);
-#endif
-        }
-    }
-    {
-        int one = 1; int little = (int)*(unsigned char *)&one;
-        unsigned char *bytes = (unsigned char *)&value;
-        return _PyLong_FromByteArray(bytes, sizeof(unsigned int),
-                                     little, !is_unsigned);
-    }
-}
-
-/* CIntToPy */
-        static CYTHON_INLINE PyObject* __Pyx_PyInt_From_unsigned_long(unsigned long value) {
-    const unsigned long neg_one = (unsigned long) -1, const_zero = (unsigned long) 0;
-    const int is_unsigned = neg_one > const_zero;
-    if (is_unsigned) {
-        if (sizeof(unsigned long) < sizeof(long)) {
-            return PyInt_FromLong((long) value);
-        } else if (sizeof(unsigned long) <= sizeof(unsigned long)) {
-            return PyLong_FromUnsignedLong((unsigned long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(unsigned long) <= sizeof(unsigned PY_LONG_LONG)) {
-            return PyLong_FromUnsignedLongLong((unsigned PY_LONG_LONG) value);
-#endif
-        }
-    } else {
-        if (sizeof(unsigned long) <= sizeof(long)) {
-            return PyInt_FromLong((long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(unsigned long) <= sizeof(PY_LONG_LONG)) {
-            return PyLong_FromLongLong((PY_LONG_LONG) value);
-#endif
-        }
-    }
-    {
-        int one = 1; int little = (int)*(unsigned char *)&one;
-        unsigned char *bytes = (unsigned char *)&value;
-        return _PyLong_FromByteArray(bytes, sizeof(unsigned long),
-                                     little, !is_unsigned);
-    }
-}
-
-/* CIntFromPyVerify */
-        #define __PYX_VERIFY_RETURN_INT(target_type, func_type, func_value)\
-    __PYX__VERIFY_RETURN_INT(target_type, func_type, func_value, 0)
-#define __PYX_VERIFY_RETURN_INT_EXC(target_type, func_type, func_value)\
-    __PYX__VERIFY_RETURN_INT(target_type, func_type, func_value, 1)
-#define __PYX__VERIFY_RETURN_INT(target_type, func_type, func_value, exc)\
-    {\
-        func_type value = func_value;\
-        if (sizeof(target_type) < sizeof(func_type)) {\
-            if (unlikely(value != (func_type) (target_type) value)) {\
-                func_type zero = 0;\
-                if (exc && unlikely(value == (func_type)-1 && PyErr_Occurred()))\
-                    return (target_type) -1;\
-                if (is_unsigned && unlikely(value < zero))\
-                    goto raise_neg_overflow;\
-                else\
-                    goto raise_overflow;\
-            }\
-        }\
-        return (target_type) value;\
-    }
-
-/* CIntToPy */
-        static CYTHON_INLINE PyObject* __Pyx_PyInt_From_long(long value) {
-    const long neg_one = (long) -1, const_zero = (long) 0;
-    const int is_unsigned = neg_one > const_zero;
-    if (is_unsigned) {
-        if (sizeof(long) < sizeof(long)) {
-            return PyInt_FromLong((long) value);
-        } else if (sizeof(long) <= sizeof(unsigned long)) {
-            return PyLong_FromUnsignedLong((unsigned long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(long) <= sizeof(unsigned PY_LONG_LONG)) {
-            return PyLong_FromUnsignedLongLong((unsigned PY_LONG_LONG) value);
-#endif
-        }
-    } else {
-        if (sizeof(long) <= sizeof(long)) {
-            return PyInt_FromLong((long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(long) <= sizeof(PY_LONG_LONG)) {
-            return PyLong_FromLongLong((PY_LONG_LONG) value);
-#endif
-        }
-    }
-    {
-        int one = 1; int little = (int)*(unsigned char *)&one;
-        unsigned char *bytes = (unsigned char *)&value;
-        return _PyLong_FromByteArray(bytes, sizeof(long),
-                                     little, !is_unsigned);
-    }
-}
-
-/* CIntToPy */
-        static CYTHON_INLINE PyObject* __Pyx_PyInt_From_MDB_dbi(MDB_dbi value) {
-    const MDB_dbi neg_one = (MDB_dbi) -1, const_zero = (MDB_dbi) 0;
-    const int is_unsigned = neg_one > const_zero;
-    if (is_unsigned) {
-        if (sizeof(MDB_dbi) < sizeof(long)) {
-            return PyInt_FromLong((long) value);
-        } else if (sizeof(MDB_dbi) <= sizeof(unsigned long)) {
-            return PyLong_FromUnsignedLong((unsigned long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(MDB_dbi) <= sizeof(unsigned PY_LONG_LONG)) {
-            return PyLong_FromUnsignedLongLong((unsigned PY_LONG_LONG) value);
-#endif
-        }
-    } else {
-        if (sizeof(MDB_dbi) <= sizeof(long)) {
-            return PyInt_FromLong((long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(MDB_dbi) <= sizeof(PY_LONG_LONG)) {
-            return PyLong_FromLongLong((PY_LONG_LONG) value);
-#endif
-        }
-    }
-    {
-        int one = 1; int little = (int)*(unsigned char *)&one;
-        unsigned char *bytes = (unsigned char *)&value;
-        return _PyLong_FromByteArray(bytes, sizeof(MDB_dbi),
-                                     little, !is_unsigned);
-    }
-}
-
-static PyObject* __pyx_convert__to_py_struct__MDB_stat(struct MDB_stat s) {
-          PyObject* res;
-          PyObject* member;
-          res = __Pyx_PyDict_NewPresized(6); if (unlikely(!res)) return NULL;
-          member = __Pyx_PyInt_From_unsigned_int(s.ms_psize); if (unlikely(!member)) goto bad;
-          if (unlikely(PyDict_SetItem(res, __pyx_n_s_ms_psize, member) < 0)) goto bad;
-          Py_DECREF(member);
-          member = __Pyx_PyInt_From_unsigned_int(s.ms_depth); if (unlikely(!member)) goto bad;
-          if (unlikely(PyDict_SetItem(res, __pyx_n_s_ms_depth, member) < 0)) goto bad;
-          Py_DECREF(member);
-          member = __Pyx_PyInt_FromSize_t(s.ms_branch_pages); if (unlikely(!member)) goto bad;
-          if (unlikely(PyDict_SetItem(res, __pyx_n_s_ms_branch_pages, member) < 0)) goto bad;
-          Py_DECREF(member);
-          member = __Pyx_PyInt_FromSize_t(s.ms_leaf_pages); if (unlikely(!member)) goto bad;
-          if (unlikely(PyDict_SetItem(res, __pyx_n_s_ms_leaf_pages, member) < 0)) goto bad;
-          Py_DECREF(member);
-          member = __Pyx_PyInt_FromSize_t(s.ms_overflow_pages); if (unlikely(!member)) goto bad;
-          if (unlikely(PyDict_SetItem(res, __pyx_n_s_ms_overflow_pages, member) < 0)) goto bad;
-          Py_DECREF(member);
-          member = __Pyx_PyInt_FromSize_t(s.ms_entries); if (unlikely(!member)) goto bad;
-          if (unlikely(PyDict_SetItem(res, __pyx_n_s_ms_entries, member) < 0)) goto bad;
-          Py_DECREF(member);
-          return res;
-          bad:
-          Py_XDECREF(member);
-          Py_DECREF(res);
-          return NULL;
-        }
-        /* CIntFromPy */
-        static CYTHON_INLINE size_t __Pyx_PyInt_As_size_t(PyObject *x) {
-    const size_t neg_one = (size_t) -1, const_zero = (size_t) 0;
-    const int is_unsigned = neg_one > const_zero;
-#if PY_MAJOR_VERSION < 3
-    if (likely(PyInt_Check(x))) {
-        if (sizeof(size_t) < sizeof(long)) {
-            __PYX_VERIFY_RETURN_INT(size_t, long, PyInt_AS_LONG(x))
-        } else {
-            long val = PyInt_AS_LONG(x);
-            if (is_unsigned && unlikely(val < 0)) {
-                goto raise_neg_overflow;
-            }
-            return (size_t) val;
-        }
-    } else
-#endif
-    if (likely(PyLong_Check(x))) {
-        if (is_unsigned) {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (size_t) 0;
-                case  1: __PYX_VERIFY_RETURN_INT(size_t, digit, digits[0])
-                case 2:
-                    if (8 * sizeof(size_t) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(size_t, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(size_t) >= 2 * PyLong_SHIFT) {
-                            return (size_t) (((((size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(size_t) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(size_t, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(size_t) >= 3 * PyLong_SHIFT) {
-                            return (size_t) (((((((size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(size_t) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(size_t, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(size_t) >= 4 * PyLong_SHIFT) {
-                            return (size_t) (((((((((size_t)digits[3]) << PyLong_SHIFT) | (size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-                        }
-                    }
-                    break;
-            }
-#endif
-#if CYTHON_COMPILING_IN_CPYTHON
-            if (unlikely(Py_SIZE(x) < 0)) {
-                goto raise_neg_overflow;
-            }
-#else
-            {
-                int result = PyObject_RichCompareBool(x, Py_False, Py_LT);
-                if (unlikely(result < 0))
-                    return (size_t) -1;
-                if (unlikely(result == 1))
-                    goto raise_neg_overflow;
-            }
-#endif
-            if (sizeof(size_t) <= sizeof(unsigned long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(size_t, unsigned long, PyLong_AsUnsignedLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(size_t) <= sizeof(unsigned PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(size_t, unsigned PY_LONG_LONG, PyLong_AsUnsignedLongLong(x))
-#endif
-            }
-        } else {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (size_t) 0;
-                case -1: __PYX_VERIFY_RETURN_INT(size_t, sdigit, (sdigit) (-(sdigit)digits[0]))
-                case  1: __PYX_VERIFY_RETURN_INT(size_t,  digit, +digits[0])
-                case -2:
-                    if (8 * sizeof(size_t) - 1 > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(size_t, long, -(long) (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(size_t) - 1 > 2 * PyLong_SHIFT) {
-                            return (size_t) (((size_t)-1)*(((((size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0])));
-                        }
-                    }
-                    break;
-                case 2:
-                    if (8 * sizeof(size_t) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(size_t, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(size_t) - 1 > 2 * PyLong_SHIFT) {
-                            return (size_t) ((((((size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0])));
-                        }
-                    }
-                    break;
-                case -3:
-                    if (8 * sizeof(size_t) - 1 > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(size_t, long, -(long) (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(size_t) - 1 > 3 * PyLong_SHIFT) {
-                            return (size_t) (((size_t)-1)*(((((((size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0])));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(size_t) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(size_t, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(size_t) - 1 > 3 * PyLong_SHIFT) {
-                            return (size_t) ((((((((size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0])));
-                        }
-                    }
-                    break;
-                case -4:
-                    if (8 * sizeof(size_t) - 1 > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(size_t, long, -(long) (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(size_t) - 1 > 4 * PyLong_SHIFT) {
-                            return (size_t) (((size_t)-1)*(((((((((size_t)digits[3]) << PyLong_SHIFT) | (size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0])));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(size_t) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(size_t, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(size_t) - 1 > 4 * PyLong_SHIFT) {
-                            return (size_t) ((((((((((size_t)digits[3]) << PyLong_SHIFT) | (size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0])));
-                        }
-                    }
-                    break;
-            }
-#endif
-            if (sizeof(size_t) <= sizeof(long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(size_t, long, PyLong_AsLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(size_t) <= sizeof(PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(size_t, PY_LONG_LONG, PyLong_AsLongLong(x))
-#endif
-            }
-        }
-        {
-#if CYTHON_COMPILING_IN_PYPY && !defined(_PyLong_AsByteArray)
-            PyErr_SetString(PyExc_RuntimeError,
-                            "_PyLong_AsByteArray() not available in PyPy, cannot convert large numbers");
-#else
-            size_t val;
-            PyObject *v = __Pyx_PyNumber_IntOrLong(x);
- #if PY_MAJOR_VERSION < 3
-            if (likely(v) && !PyLong_Check(v)) {
-                PyObject *tmp = v;
-                v = PyNumber_Long(tmp);
-                Py_DECREF(tmp);
-            }
- #endif
-            if (likely(v)) {
-                int one = 1; int is_little = (int)*(unsigned char *)&one;
-                unsigned char *bytes = (unsigned char *)&val;
-                int ret = _PyLong_AsByteArray((PyLongObject *)v,
-                                              bytes, sizeof(val),
-                                              is_little, !is_unsigned);
-                Py_DECREF(v);
-                if (likely(!ret))
-                    return val;
-            }
-#endif
-            return (size_t) -1;
-        }
-    } else {
-        size_t val;
-        PyObject *tmp = __Pyx_PyNumber_IntOrLong(x);
-        if (!tmp) return (size_t) -1;
-        val = __Pyx_PyInt_As_size_t(tmp);
-        Py_DECREF(tmp);
-        return val;
-    }
-raise_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "value too large to convert to size_t");
-    return (size_t) -1;
-raise_neg_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "can't convert negative value to size_t");
-    return (size_t) -1;
-}
-
-/* CIntFromPy */
-        static CYTHON_INLINE MDB_dbi __Pyx_PyInt_As_MDB_dbi(PyObject *x) {
-    const MDB_dbi neg_one = (MDB_dbi) -1, const_zero = (MDB_dbi) 0;
-    const int is_unsigned = neg_one > const_zero;
-#if PY_MAJOR_VERSION < 3
-    if (likely(PyInt_Check(x))) {
-        if (sizeof(MDB_dbi) < sizeof(long)) {
-            __PYX_VERIFY_RETURN_INT(MDB_dbi, long, PyInt_AS_LONG(x))
-        } else {
-            long val = PyInt_AS_LONG(x);
-            if (is_unsigned && unlikely(val < 0)) {
-                goto raise_neg_overflow;
-            }
-            return (MDB_dbi) val;
-        }
-    } else
-#endif
-    if (likely(PyLong_Check(x))) {
-        if (is_unsigned) {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (MDB_dbi) 0;
-                case  1: __PYX_VERIFY_RETURN_INT(MDB_dbi, digit, digits[0])
-                case 2:
-                    if (8 * sizeof(MDB_dbi) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(MDB_dbi, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(MDB_dbi) >= 2 * PyLong_SHIFT) {
-                            return (MDB_dbi) (((((MDB_dbi)digits[1]) << PyLong_SHIFT) | (MDB_dbi)digits[0]));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(MDB_dbi) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(MDB_dbi, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(MDB_dbi) >= 3 * PyLong_SHIFT) {
-                            return (MDB_dbi) (((((((MDB_dbi)digits[2]) << PyLong_SHIFT) | (MDB_dbi)digits[1]) << PyLong_SHIFT) | (MDB_dbi)digits[0]));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(MDB_dbi) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(MDB_dbi, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(MDB_dbi) >= 4 * PyLong_SHIFT) {
-                            return (MDB_dbi) (((((((((MDB_dbi)digits[3]) << PyLong_SHIFT) | (MDB_dbi)digits[2]) << PyLong_SHIFT) | (MDB_dbi)digits[1]) << PyLong_SHIFT) | (MDB_dbi)digits[0]));
-                        }
-                    }
-                    break;
-            }
-#endif
-#if CYTHON_COMPILING_IN_CPYTHON
-            if (unlikely(Py_SIZE(x) < 0)) {
-                goto raise_neg_overflow;
-            }
-#else
-            {
-                int result = PyObject_RichCompareBool(x, Py_False, Py_LT);
-                if (unlikely(result < 0))
-                    return (MDB_dbi) -1;
-                if (unlikely(result == 1))
-                    goto raise_neg_overflow;
-            }
-#endif
-            if (sizeof(MDB_dbi) <= sizeof(unsigned long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(MDB_dbi, unsigned long, PyLong_AsUnsignedLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(MDB_dbi) <= sizeof(unsigned PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(MDB_dbi, unsigned PY_LONG_LONG, PyLong_AsUnsignedLongLong(x))
-#endif
-            }
-        } else {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (MDB_dbi) 0;
-                case -1: __PYX_VERIFY_RETURN_INT(MDB_dbi, sdigit, (sdigit) (-(sdigit)digits[0]))
-                case  1: __PYX_VERIFY_RETURN_INT(MDB_dbi,  digit, +digits[0])
-                case -2:
-                    if (8 * sizeof(MDB_dbi) - 1 > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(MDB_dbi, long, -(long) (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(MDB_dbi) - 1 > 2 * PyLong_SHIFT) {
-                            return (MDB_dbi) (((MDB_dbi)-1)*(((((MDB_dbi)digits[1]) << PyLong_SHIFT) | (MDB_dbi)digits[0])));
-                        }
-                    }
-                    break;
-                case 2:
-                    if (8 * sizeof(MDB_dbi) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(MDB_dbi, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(MDB_dbi) - 1 > 2 * PyLong_SHIFT) {
-                            return (MDB_dbi) ((((((MDB_dbi)digits[1]) << PyLong_SHIFT) | (MDB_dbi)digits[0])));
-                        }
-                    }
-                    break;
-                case -3:
-                    if (8 * sizeof(MDB_dbi) - 1 > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(MDB_dbi, long, -(long) (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(MDB_dbi) - 1 > 3 * PyLong_SHIFT) {
-                            return (MDB_dbi) (((MDB_dbi)-1)*(((((((MDB_dbi)digits[2]) << PyLong_SHIFT) | (MDB_dbi)digits[1]) << PyLong_SHIFT) | (MDB_dbi)digits[0])));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(MDB_dbi) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(MDB_dbi, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(MDB_dbi) - 1 > 3 * PyLong_SHIFT) {
-                            return (MDB_dbi) ((((((((MDB_dbi)digits[2]) << PyLong_SHIFT) | (MDB_dbi)digits[1]) << PyLong_SHIFT) | (MDB_dbi)digits[0])));
-                        }
-                    }
-                    break;
-                case -4:
-                    if (8 * sizeof(MDB_dbi) - 1 > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(MDB_dbi, long, -(long) (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(MDB_dbi) - 1 > 4 * PyLong_SHIFT) {
-                            return (MDB_dbi) (((MDB_dbi)-1)*(((((((((MDB_dbi)digits[3]) << PyLong_SHIFT) | (MDB_dbi)digits[2]) << PyLong_SHIFT) | (MDB_dbi)digits[1]) << PyLong_SHIFT) | (MDB_dbi)digits[0])));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(MDB_dbi) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(MDB_dbi, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(MDB_dbi) - 1 > 4 * PyLong_SHIFT) {
-                            return (MDB_dbi) ((((((((((MDB_dbi)digits[3]) << PyLong_SHIFT) | (MDB_dbi)digits[2]) << PyLong_SHIFT) | (MDB_dbi)digits[1]) << PyLong_SHIFT) | (MDB_dbi)digits[0])));
-                        }
-                    }
-                    break;
-            }
-#endif
-            if (sizeof(MDB_dbi) <= sizeof(long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(MDB_dbi, long, PyLong_AsLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(MDB_dbi) <= sizeof(PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(MDB_dbi, PY_LONG_LONG, PyLong_AsLongLong(x))
-#endif
-            }
-        }
-        {
-#if CYTHON_COMPILING_IN_PYPY && !defined(_PyLong_AsByteArray)
-            PyErr_SetString(PyExc_RuntimeError,
-                            "_PyLong_AsByteArray() not available in PyPy, cannot convert large numbers");
-#else
-            MDB_dbi val;
-            PyObject *v = __Pyx_PyNumber_IntOrLong(x);
- #if PY_MAJOR_VERSION < 3
-            if (likely(v) && !PyLong_Check(v)) {
-                PyObject *tmp = v;
-                v = PyNumber_Long(tmp);
-                Py_DECREF(tmp);
-            }
- #endif
-            if (likely(v)) {
-                int one = 1; int is_little = (int)*(unsigned char *)&one;
-                unsigned char *bytes = (unsigned char *)&val;
-                int ret = _PyLong_AsByteArray((PyLongObject *)v,
-                                              bytes, sizeof(val),
-                                              is_little, !is_unsigned);
-                Py_DECREF(v);
-                if (likely(!ret))
-                    return val;
-            }
-#endif
-            return (MDB_dbi) -1;
-        }
-    } else {
-        MDB_dbi val;
-        PyObject *tmp = __Pyx_PyNumber_IntOrLong(x);
-        if (!tmp) return (MDB_dbi) -1;
-        val = __Pyx_PyInt_As_MDB_dbi(tmp);
-        Py_DECREF(tmp);
-        return val;
-    }
-raise_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "value too large to convert to MDB_dbi");
-    return (MDB_dbi) -1;
-raise_neg_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "can't convert negative value to MDB_dbi");
-    return (MDB_dbi) -1;
-}
-
-/* CIntFromPy */
-        static CYTHON_INLINE unsigned int __Pyx_PyInt_As_unsigned_int(PyObject *x) {
-    const unsigned int neg_one = (unsigned int) -1, const_zero = (unsigned int) 0;
-    const int is_unsigned = neg_one > const_zero;
-#if PY_MAJOR_VERSION < 3
-    if (likely(PyInt_Check(x))) {
-        if (sizeof(unsigned int) < sizeof(long)) {
-            __PYX_VERIFY_RETURN_INT(unsigned int, long, PyInt_AS_LONG(x))
-        } else {
-            long val = PyInt_AS_LONG(x);
-            if (is_unsigned && unlikely(val < 0)) {
-                goto raise_neg_overflow;
-            }
-            return (unsigned int) val;
-        }
-    } else
-#endif
-    if (likely(PyLong_Check(x))) {
-        if (is_unsigned) {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (unsigned int) 0;
-                case  1: __PYX_VERIFY_RETURN_INT(unsigned int, digit, digits[0])
-                case 2:
-                    if (8 * sizeof(unsigned int) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(unsigned int, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(unsigned int) >= 2 * PyLong_SHIFT) {
-                            return (unsigned int) (((((unsigned int)digits[1]) << PyLong_SHIFT) | (unsigned int)digits[0]));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(unsigned int) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(unsigned int, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(unsigned int) >= 3 * PyLong_SHIFT) {
-                            return (unsigned int) (((((((unsigned int)digits[2]) << PyLong_SHIFT) | (unsigned int)digits[1]) << PyLong_SHIFT) | (unsigned int)digits[0]));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(unsigned int) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(unsigned int, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(unsigned int) >= 4 * PyLong_SHIFT) {
-                            return (unsigned int) (((((((((unsigned int)digits[3]) << PyLong_SHIFT) | (unsigned int)digits[2]) << PyLong_SHIFT) | (unsigned int)digits[1]) << PyLong_SHIFT) | (unsigned int)digits[0]));
-                        }
-                    }
-                    break;
-            }
-#endif
-#if CYTHON_COMPILING_IN_CPYTHON
-            if (unlikely(Py_SIZE(x) < 0)) {
-                goto raise_neg_overflow;
-            }
-#else
-            {
-                int result = PyObject_RichCompareBool(x, Py_False, Py_LT);
-                if (unlikely(result < 0))
-                    return (unsigned int) -1;
-                if (unlikely(result == 1))
-                    goto raise_neg_overflow;
-            }
-#endif
-            if (sizeof(unsigned int) <= sizeof(unsigned long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(unsigned int, unsigned long, PyLong_AsUnsignedLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(unsigned int) <= sizeof(unsigned PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(unsigned int, unsigned PY_LONG_LONG, PyLong_AsUnsignedLongLong(x))
-#endif
-            }
-        } else {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (unsigned int) 0;
-                case -1: __PYX_VERIFY_RETURN_INT(unsigned int, sdigit, (sdigit) (-(sdigit)digits[0]))
-                case  1: __PYX_VERIFY_RETURN_INT(unsigned int,  digit, +digits[0])
-                case -2:
-                    if (8 * sizeof(unsigned int) - 1 > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(unsigned int, long, -(long) (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(unsigned int) - 1 > 2 * PyLong_SHIFT) {
-                            return (unsigned int) (((unsigned int)-1)*(((((unsigned int)digits[1]) << PyLong_SHIFT) | (unsigned int)digits[0])));
-                        }
-                    }
-                    break;
-                case 2:
-                    if (8 * sizeof(unsigned int) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(unsigned int, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(unsigned int) - 1 > 2 * PyLong_SHIFT) {
-                            return (unsigned int) ((((((unsigned int)digits[1]) << PyLong_SHIFT) | (unsigned int)digits[0])));
-                        }
-                    }
-                    break;
-                case -3:
-                    if (8 * sizeof(unsigned int) - 1 > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(unsigned int, long, -(long) (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(unsigned int) - 1 > 3 * PyLong_SHIFT) {
-                            return (unsigned int) (((unsigned int)-1)*(((((((unsigned int)digits[2]) << PyLong_SHIFT) | (unsigned int)digits[1]) << PyLong_SHIFT) | (unsigned int)digits[0])));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(unsigned int) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(unsigned int, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(unsigned int) - 1 > 3 * PyLong_SHIFT) {
-                            return (unsigned int) ((((((((unsigned int)digits[2]) << PyLong_SHIFT) | (unsigned int)digits[1]) << PyLong_SHIFT) | (unsigned int)digits[0])));
-                        }
-                    }
-                    break;
-                case -4:
-                    if (8 * sizeof(unsigned int) - 1 > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(unsigned int, long, -(long) (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(unsigned int) - 1 > 4 * PyLong_SHIFT) {
-                            return (unsigned int) (((unsigned int)-1)*(((((((((unsigned int)digits[3]) << PyLong_SHIFT) | (unsigned int)digits[2]) << PyLong_SHIFT) | (unsigned int)digits[1]) << PyLong_SHIFT) | (unsigned int)digits[0])));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(unsigned int) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(unsigned int, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(unsigned int) - 1 > 4 * PyLong_SHIFT) {
-                            return (unsigned int) ((((((((((unsigned int)digits[3]) << PyLong_SHIFT) | (unsigned int)digits[2]) << PyLong_SHIFT) | (unsigned int)digits[1]) << PyLong_SHIFT) | (unsigned int)digits[0])));
-                        }
-                    }
-                    break;
-            }
-#endif
-            if (sizeof(unsigned int) <= sizeof(long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(unsigned int, long, PyLong_AsLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(unsigned int) <= sizeof(PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(unsigned int, PY_LONG_LONG, PyLong_AsLongLong(x))
-#endif
-            }
-        }
-        {
-#if CYTHON_COMPILING_IN_PYPY && !defined(_PyLong_AsByteArray)
-            PyErr_SetString(PyExc_RuntimeError,
-                            "_PyLong_AsByteArray() not available in PyPy, cannot convert large numbers");
-#else
-            unsigned int val;
-            PyObject *v = __Pyx_PyNumber_IntOrLong(x);
- #if PY_MAJOR_VERSION < 3
-            if (likely(v) && !PyLong_Check(v)) {
-                PyObject *tmp = v;
-                v = PyNumber_Long(tmp);
-                Py_DECREF(tmp);
-            }
- #endif
-            if (likely(v)) {
-                int one = 1; int is_little = (int)*(unsigned char *)&one;
-                unsigned char *bytes = (unsigned char *)&val;
-                int ret = _PyLong_AsByteArray((PyLongObject *)v,
-                                              bytes, sizeof(val),
-                                              is_little, !is_unsigned);
-                Py_DECREF(v);
-                if (likely(!ret))
-                    return val;
-            }
-#endif
-            return (unsigned int) -1;
-        }
-    } else {
-        unsigned int val;
-        PyObject *tmp = __Pyx_PyNumber_IntOrLong(x);
-        if (!tmp) return (unsigned int) -1;
-        val = __Pyx_PyInt_As_unsigned_int(tmp);
-        Py_DECREF(tmp);
-        return val;
-    }
-raise_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "value too large to convert to unsigned int");
-    return (unsigned int) -1;
-raise_neg_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "can't convert negative value to unsigned int");
-    return (unsigned int) -1;
-}
-
-/* CIntFromPy */
-        static CYTHON_INLINE mode_t __Pyx_PyInt_As_mode_t(PyObject *x) {
-    const mode_t neg_one = (mode_t) -1, const_zero = (mode_t) 0;
-    const int is_unsigned = neg_one > const_zero;
-#if PY_MAJOR_VERSION < 3
-    if (likely(PyInt_Check(x))) {
-        if (sizeof(mode_t) < sizeof(long)) {
-            __PYX_VERIFY_RETURN_INT(mode_t, long, PyInt_AS_LONG(x))
-        } else {
-            long val = PyInt_AS_LONG(x);
-            if (is_unsigned && unlikely(val < 0)) {
-                goto raise_neg_overflow;
-            }
-            return (mode_t) val;
-        }
-    } else
-#endif
-    if (likely(PyLong_Check(x))) {
-        if (is_unsigned) {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (mode_t) 0;
-                case  1: __PYX_VERIFY_RETURN_INT(mode_t, digit, digits[0])
-                case 2:
-                    if (8 * sizeof(mode_t) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(mode_t, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(mode_t) >= 2 * PyLong_SHIFT) {
-                            return (mode_t) (((((mode_t)digits[1]) << PyLong_SHIFT) | (mode_t)digits[0]));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(mode_t) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(mode_t, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(mode_t) >= 3 * PyLong_SHIFT) {
-                            return (mode_t) (((((((mode_t)digits[2]) << PyLong_SHIFT) | (mode_t)digits[1]) << PyLong_SHIFT) | (mode_t)digits[0]));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(mode_t) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(mode_t, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(mode_t) >= 4 * PyLong_SHIFT) {
-                            return (mode_t) (((((((((mode_t)digits[3]) << PyLong_SHIFT) | (mode_t)digits[2]) << PyLong_SHIFT) | (mode_t)digits[1]) << PyLong_SHIFT) | (mode_t)digits[0]));
-                        }
-                    }
-                    break;
-            }
-#endif
-#if CYTHON_COMPILING_IN_CPYTHON
-            if (unlikely(Py_SIZE(x) < 0)) {
-                goto raise_neg_overflow;
-            }
-#else
-            {
-                int result = PyObject_RichCompareBool(x, Py_False, Py_LT);
-                if (unlikely(result < 0))
-                    return (mode_t) -1;
-                if (unlikely(result == 1))
-                    goto raise_neg_overflow;
-            }
-#endif
-            if (sizeof(mode_t) <= sizeof(unsigned long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(mode_t, unsigned long, PyLong_AsUnsignedLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(mode_t) <= sizeof(unsigned PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(mode_t, unsigned PY_LONG_LONG, PyLong_AsUnsignedLongLong(x))
-#endif
-            }
-        } else {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (mode_t) 0;
-                case -1: __PYX_VERIFY_RETURN_INT(mode_t, sdigit, (sdigit) (-(sdigit)digits[0]))
-                case  1: __PYX_VERIFY_RETURN_INT(mode_t,  digit, +digits[0])
-                case -2:
-                    if (8 * sizeof(mode_t) - 1 > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(mode_t, long, -(long) (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(mode_t) - 1 > 2 * PyLong_SHIFT) {
-                            return (mode_t) (((mode_t)-1)*(((((mode_t)digits[1]) << PyLong_SHIFT) | (mode_t)digits[0])));
-                        }
-                    }
-                    break;
-                case 2:
-                    if (8 * sizeof(mode_t) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(mode_t, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(mode_t) - 1 > 2 * PyLong_SHIFT) {
-                            return (mode_t) ((((((mode_t)digits[1]) << PyLong_SHIFT) | (mode_t)digits[0])));
-                        }
-                    }
-                    break;
-                case -3:
-                    if (8 * sizeof(mode_t) - 1 > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(mode_t, long, -(long) (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(mode_t) - 1 > 3 * PyLong_SHIFT) {
-                            return (mode_t) (((mode_t)-1)*(((((((mode_t)digits[2]) << PyLong_SHIFT) | (mode_t)digits[1]) << PyLong_SHIFT) | (mode_t)digits[0])));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(mode_t) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(mode_t, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(mode_t) - 1 > 3 * PyLong_SHIFT) {
-                            return (mode_t) ((((((((mode_t)digits[2]) << PyLong_SHIFT) | (mode_t)digits[1]) << PyLong_SHIFT) | (mode_t)digits[0])));
-                        }
-                    }
-                    break;
-                case -4:
-                    if (8 * sizeof(mode_t) - 1 > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(mode_t, long, -(long) (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(mode_t) - 1 > 4 * PyLong_SHIFT) {
-                            return (mode_t) (((mode_t)-1)*(((((((((mode_t)digits[3]) << PyLong_SHIFT) | (mode_t)digits[2]) << PyLong_SHIFT) | (mode_t)digits[1]) << PyLong_SHIFT) | (mode_t)digits[0])));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(mode_t) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(mode_t, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(mode_t) - 1 > 4 * PyLong_SHIFT) {
-                            return (mode_t) ((((((((((mode_t)digits[3]) << PyLong_SHIFT) | (mode_t)digits[2]) << PyLong_SHIFT) | (mode_t)digits[1]) << PyLong_SHIFT) | (mode_t)digits[0])));
-                        }
-                    }
-                    break;
-            }
-#endif
-            if (sizeof(mode_t) <= sizeof(long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(mode_t, long, PyLong_AsLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(mode_t) <= sizeof(PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(mode_t, PY_LONG_LONG, PyLong_AsLongLong(x))
-#endif
-            }
-        }
-        {
-#if CYTHON_COMPILING_IN_PYPY && !defined(_PyLong_AsByteArray)
-            PyErr_SetString(PyExc_RuntimeError,
-                            "_PyLong_AsByteArray() not available in PyPy, cannot convert large numbers");
-#else
-            mode_t val;
-            PyObject *v = __Pyx_PyNumber_IntOrLong(x);
- #if PY_MAJOR_VERSION < 3
-            if (likely(v) && !PyLong_Check(v)) {
-                PyObject *tmp = v;
-                v = PyNumber_Long(tmp);
-                Py_DECREF(tmp);
-            }
- #endif
-            if (likely(v)) {
-                int one = 1; int is_little = (int)*(unsigned char *)&one;
-                unsigned char *bytes = (unsigned char *)&val;
-                int ret = _PyLong_AsByteArray((PyLongObject *)v,
-                                              bytes, sizeof(val),
-                                              is_little, !is_unsigned);
-                Py_DECREF(v);
-                if (likely(!ret))
-                    return val;
-            }
-#endif
-            return (mode_t) -1;
-        }
-    } else {
-        mode_t val;
-        PyObject *tmp = __Pyx_PyNumber_IntOrLong(x);
-        if (!tmp) return (mode_t) -1;
-        val = __Pyx_PyInt_As_mode_t(tmp);
-        Py_DECREF(tmp);
-        return val;
-    }
-raise_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "value too large to convert to mode_t");
-    return (mode_t) -1;
-raise_neg_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "can't convert negative value to mode_t");
-    return (mode_t) -1;
-}
-
-/* CIntFromPy */
-        static CYTHON_INLINE int __Pyx_PyInt_As_int(PyObject *x) {
-    const int neg_one = (int) -1, const_zero = (int) 0;
-    const int is_unsigned = neg_one > const_zero;
-#if PY_MAJOR_VERSION < 3
-    if (likely(PyInt_Check(x))) {
-        if (sizeof(int) < sizeof(long)) {
-            __PYX_VERIFY_RETURN_INT(int, long, PyInt_AS_LONG(x))
-        } else {
-            long val = PyInt_AS_LONG(x);
-            if (is_unsigned && unlikely(val < 0)) {
-                goto raise_neg_overflow;
-            }
-            return (int) val;
-        }
-    } else
-#endif
-    if (likely(PyLong_Check(x))) {
-        if (is_unsigned) {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (int) 0;
-                case  1: __PYX_VERIFY_RETURN_INT(int, digit, digits[0])
-                case 2:
-                    if (8 * sizeof(int) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) >= 2 * PyLong_SHIFT) {
-                            return (int) (((((int)digits[1]) << PyLong_SHIFT) | (int)digits[0]));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(int) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) >= 3 * PyLong_SHIFT) {
-                            return (int) (((((((int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0]));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(int) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) >= 4 * PyLong_SHIFT) {
-                            return (int) (((((((((int)digits[3]) << PyLong_SHIFT) | (int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0]));
-                        }
-                    }
-                    break;
-            }
-#endif
-#if CYTHON_COMPILING_IN_CPYTHON
-            if (unlikely(Py_SIZE(x) < 0)) {
-                goto raise_neg_overflow;
-            }
-#else
-            {
-                int result = PyObject_RichCompareBool(x, Py_False, Py_LT);
-                if (unlikely(result < 0))
-                    return (int) -1;
-                if (unlikely(result == 1))
-                    goto raise_neg_overflow;
-            }
-#endif
-            if (sizeof(int) <= sizeof(unsigned long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(int, unsigned long, PyLong_AsUnsignedLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(int) <= sizeof(unsigned PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(int, unsigned PY_LONG_LONG, PyLong_AsUnsignedLongLong(x))
-#endif
-            }
-        } else {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (int) 0;
-                case -1: __PYX_VERIFY_RETURN_INT(int, sdigit, (sdigit) (-(sdigit)digits[0]))
-                case  1: __PYX_VERIFY_RETURN_INT(int,  digit, +digits[0])
-                case -2:
-                    if (8 * sizeof(int) - 1 > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, long, -(long) (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 2 * PyLong_SHIFT) {
-                            return (int) (((int)-1)*(((((int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-                case 2:
-                    if (8 * sizeof(int) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 2 * PyLong_SHIFT) {
-                            return (int) ((((((int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-                case -3:
-                    if (8 * sizeof(int) - 1 > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, long, -(long) (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 3 * PyLong_SHIFT) {
-                            return (int) (((int)-1)*(((((((int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(int) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 3 * PyLong_SHIFT) {
-                            return (int) ((((((((int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-                case -4:
-                    if (8 * sizeof(int) - 1 > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, long, -(long) (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 4 * PyLong_SHIFT) {
-                            return (int) (((int)-1)*(((((((((int)digits[3]) << PyLong_SHIFT) | (int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(int) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 4 * PyLong_SHIFT) {
-                            return (int) ((((((((((int)digits[3]) << PyLong_SHIFT) | (int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-            }
-#endif
-            if (sizeof(int) <= sizeof(long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(int, long, PyLong_AsLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(int) <= sizeof(PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(int, PY_LONG_LONG, PyLong_AsLongLong(x))
-#endif
-            }
-        }
-        {
-#if CYTHON_COMPILING_IN_PYPY && !defined(_PyLong_AsByteArray)
-            PyErr_SetString(PyExc_RuntimeError,
-                            "_PyLong_AsByteArray() not available in PyPy, cannot convert large numbers");
-#else
-            int val;
-            PyObject *v = __Pyx_PyNumber_IntOrLong(x);
- #if PY_MAJOR_VERSION < 3
-            if (likely(v) && !PyLong_Check(v)) {
-                PyObject *tmp = v;
-                v = PyNumber_Long(tmp);
-                Py_DECREF(tmp);
-            }
- #endif
-            if (likely(v)) {
-                int one = 1; int is_little = (int)*(unsigned char *)&one;
-                unsigned char *bytes = (unsigned char *)&val;
-                int ret = _PyLong_AsByteArray((PyLongObject *)v,
-                                              bytes, sizeof(val),
-                                              is_little, !is_unsigned);
-                Py_DECREF(v);
-                if (likely(!ret))
-                    return val;
-            }
-#endif
-            return (int) -1;
-        }
-    } else {
-        int val;
-        PyObject *tmp = __Pyx_PyNumber_IntOrLong(x);
-        if (!tmp) return (int) -1;
-        val = __Pyx_PyInt_As_int(tmp);
-        Py_DECREF(tmp);
-        return val;
-    }
-raise_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "value too large to convert to int");
-    return (int) -1;
-raise_neg_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "can't convert negative value to int");
-    return (int) -1;
-}
-
-/* CIntFromPy */
-        static CYTHON_INLINE long __Pyx_PyInt_As_long(PyObject *x) {
-    const long neg_one = (long) -1, const_zero = (long) 0;
-    const int is_unsigned = neg_one > const_zero;
-#if PY_MAJOR_VERSION < 3
-    if (likely(PyInt_Check(x))) {
-        if (sizeof(long) < sizeof(long)) {
-            __PYX_VERIFY_RETURN_INT(long, long, PyInt_AS_LONG(x))
-        } else {
-            long val = PyInt_AS_LONG(x);
-            if (is_unsigned && unlikely(val < 0)) {
-                goto raise_neg_overflow;
-            }
-            return (long) val;
-        }
-    } else
-#endif
-    if (likely(PyLong_Check(x))) {
-        if (is_unsigned) {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (long) 0;
-                case  1: __PYX_VERIFY_RETURN_INT(long, digit, digits[0])
-                case 2:
-                    if (8 * sizeof(long) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) >= 2 * PyLong_SHIFT) {
-                            return (long) (((((long)digits[1]) << PyLong_SHIFT) | (long)digits[0]));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(long) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) >= 3 * PyLong_SHIFT) {
-                            return (long) (((((((long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0]));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(long) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) >= 4 * PyLong_SHIFT) {
-                            return (long) (((((((((long)digits[3]) << PyLong_SHIFT) | (long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0]));
-                        }
-                    }
-                    break;
-            }
-#endif
-#if CYTHON_COMPILING_IN_CPYTHON
-            if (unlikely(Py_SIZE(x) < 0)) {
-                goto raise_neg_overflow;
-            }
-#else
-            {
-                int result = PyObject_RichCompareBool(x, Py_False, Py_LT);
-                if (unlikely(result < 0))
-                    return (long) -1;
-                if (unlikely(result == 1))
-                    goto raise_neg_overflow;
-            }
-#endif
-            if (sizeof(long) <= sizeof(unsigned long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(long, unsigned long, PyLong_AsUnsignedLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(long) <= sizeof(unsigned PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(long, unsigned PY_LONG_LONG, PyLong_AsUnsignedLongLong(x))
-#endif
-            }
-        } else {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (long) 0;
-                case -1: __PYX_VERIFY_RETURN_INT(long, sdigit, (sdigit) (-(sdigit)digits[0]))
-                case  1: __PYX_VERIFY_RETURN_INT(long,  digit, +digits[0])
-                case -2:
-                    if (8 * sizeof(long) - 1 > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, long, -(long) (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 2 * PyLong_SHIFT) {
-                            return (long) (((long)-1)*(((((long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-                case 2:
-                    if (8 * sizeof(long) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 2 * PyLong_SHIFT) {
-                            return (long) ((((((long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-                case -3:
-                    if (8 * sizeof(long) - 1 > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, long, -(long) (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 3 * PyLong_SHIFT) {
-                            return (long) (((long)-1)*(((((((long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(long) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 3 * PyLong_SHIFT) {
-                            return (long) ((((((((long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-                case -4:
-                    if (8 * sizeof(long) - 1 > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, long, -(long) (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 4 * PyLong_SHIFT) {
-                            return (long) (((long)-1)*(((((((((long)digits[3]) << PyLong_SHIFT) | (long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(long) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 4 * PyLong_SHIFT) {
-                            return (long) ((((((((((long)digits[3]) << PyLong_SHIFT) | (long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-            }
-#endif
-            if (sizeof(long) <= sizeof(long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(long, long, PyLong_AsLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(long) <= sizeof(PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(long, PY_LONG_LONG, PyLong_AsLongLong(x))
-#endif
-            }
-        }
-        {
-#if CYTHON_COMPILING_IN_PYPY && !defined(_PyLong_AsByteArray)
-            PyErr_SetString(PyExc_RuntimeError,
-                            "_PyLong_AsByteArray() not available in PyPy, cannot convert large numbers");
-#else
-            long val;
-            PyObject *v = __Pyx_PyNumber_IntOrLong(x);
- #if PY_MAJOR_VERSION < 3
-            if (likely(v) && !PyLong_Check(v)) {
-                PyObject *tmp = v;
-                v = PyNumber_Long(tmp);
-                Py_DECREF(tmp);
-            }
- #endif
-            if (likely(v)) {
-                int one = 1; int is_little = (int)*(unsigned char *)&one;
-                unsigned char *bytes = (unsigned char *)&val;
-                int ret = _PyLong_AsByteArray((PyLongObject *)v,
-                                              bytes, sizeof(val),
-                                              is_little, !is_unsigned);
-                Py_DECREF(v);
-                if (likely(!ret))
-                    return val;
-            }
-#endif
-            return (long) -1;
-        }
-    } else {
-        long val;
-        PyObject *tmp = __Pyx_PyNumber_IntOrLong(x);
-        if (!tmp) return (long) -1;
-        val = __Pyx_PyInt_As_long(tmp);
-        Py_DECREF(tmp);
-        return val;
-    }
-raise_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "value too large to convert to long");
-    return (long) -1;
-raise_neg_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "can't convert negative value to long");
-    return (long) -1;
-}
-
-/* FetchCommonType */
-        static PyTypeObject* __Pyx_FetchCommonType(PyTypeObject* type) {
-    PyObject* fake_module;
-    PyTypeObject* cached_type = NULL;
-    fake_module = PyImport_AddModule((char*) "_cython_" CYTHON_ABI);
-    if (!fake_module) return NULL;
-    Py_INCREF(fake_module);
-    cached_type = (PyTypeObject*) PyObject_GetAttrString(fake_module, type->tp_name);
-    if (cached_type) {
-        if (!PyType_Check((PyObject*)cached_type)) {
-            PyErr_Format(PyExc_TypeError,
-                "Shared Cython type %.200s is not a type object",
-                type->tp_name);
-            goto bad;
-        }
-        if (cached_type->tp_basicsize != type->tp_basicsize) {
-            PyErr_Format(PyExc_TypeError,
-                "Shared Cython type %.200s has the wrong size, try recompiling",
-                type->tp_name);
-            goto bad;
-        }
-    } else {
-        if (!PyErr_ExceptionMatches(PyExc_AttributeError)) goto bad;
-        PyErr_Clear();
-        if (PyType_Ready(type) < 0) goto bad;
-        if (PyObject_SetAttrString(fake_module, type->tp_name, (PyObject*) type) < 0)
-            goto bad;
-        Py_INCREF(type);
-        cached_type = type;
-    }
-done:
-    Py_DECREF(fake_module);
-    return cached_type;
-bad:
-    Py_XDECREF(cached_type);
-    cached_type = NULL;
-    goto done;
-}
-
-/* PyObjectCallMethod1 */
-        static PyObject* __Pyx__PyObject_CallMethod1(PyObject* method, PyObject* arg) {
-    PyObject *result = NULL;
-#if CYTHON_UNPACK_METHODS
-    if (likely(PyMethod_Check(method))) {
-        PyObject *self = PyMethod_GET_SELF(method);
-        if (likely(self)) {
-            PyObject *args;
-            PyObject *function = PyMethod_GET_FUNCTION(method);
-            #if CYTHON_FAST_PYCALL
-            if (PyFunction_Check(function)) {
-                PyObject *args[2] = {self, arg};
-                result = __Pyx_PyFunction_FastCall(function, args, 2);
-                goto done;
-            }
-            #endif
-            #if CYTHON_FAST_PYCCALL
-            if (__Pyx_PyFastCFunction_Check(function)) {
-                PyObject *args[2] = {self, arg};
-                result = __Pyx_PyCFunction_FastCall(function, args, 2);
-                goto done;
-            }
-            #endif
-            args = PyTuple_New(2);
-            if (unlikely(!args)) goto done;
-            Py_INCREF(self);
-            PyTuple_SET_ITEM(args, 0, self);
-            Py_INCREF(arg);
-            PyTuple_SET_ITEM(args, 1, arg);
-            Py_INCREF(function);
-            result = __Pyx_PyObject_Call(function, args, NULL);
-            Py_DECREF(args);
-            Py_DECREF(function);
-            return result;
-        }
-    }
-#endif
-    result = __Pyx_PyObject_CallOneArg(method, arg);
-    goto done;
-done:
-    return result;
-}
-static PyObject* __Pyx_PyObject_CallMethod1(PyObject* obj, PyObject* method_name, PyObject* arg) {
-    PyObject *method, *result;
-    method = __Pyx_PyObject_GetAttrStr(obj, method_name);
-    if (unlikely(!method)) return NULL;
-    result = __Pyx__PyObject_CallMethod1(method, arg);
-    Py_DECREF(method);
-    return result;
-}
-
-/* CoroutineBase */
-        #include <structmember.h>
-#include <frameobject.h>
-#define __Pyx_Coroutine_Undelegate(gen) Py_CLEAR((gen)->yieldfrom)
-static int __Pyx_PyGen__FetchStopIterationValue(CYTHON_UNUSED PyThreadState *__pyx_tstate, PyObject **pvalue) {
-    PyObject *et, *ev, *tb;
-    PyObject *value = NULL;
-    __Pyx_ErrFetch(&et, &ev, &tb);
-    if (!et) {
-        Py_XDECREF(tb);
-        Py_XDECREF(ev);
-        Py_INCREF(Py_None);
-        *pvalue = Py_None;
-        return 0;
-    }
-    if (likely(et == PyExc_StopIteration)) {
-        if (!ev) {
-            Py_INCREF(Py_None);
-            value = Py_None;
-        }
-#if PY_VERSION_HEX >= 0x030300A0
-        else if (Py_TYPE(ev) == (PyTypeObject*)PyExc_StopIteration) {
-            value = ((PyStopIterationObject *)ev)->value;
-            Py_INCREF(value);
-            Py_DECREF(ev);
-        }
-#endif
-        else if (unlikely(PyTuple_Check(ev))) {
-            if (PyTuple_GET_SIZE(ev) >= 1) {
-#if CYTHON_ASSUME_SAFE_MACROS && !CYTHON_AVOID_BORROWED_REFS
-                value = PyTuple_GET_ITEM(ev, 0);
-                Py_INCREF(value);
-#else
-                value = PySequence_ITEM(ev, 0);
-#endif
-            } else {
-                Py_INCREF(Py_None);
-                value = Py_None;
-            }
-            Py_DECREF(ev);
-        }
-        else if (!__Pyx_TypeCheck(ev, (PyTypeObject*)PyExc_StopIteration)) {
-            value = ev;
-        }
-        if (likely(value)) {
-            Py_XDECREF(tb);
-            Py_DECREF(et);
-            *pvalue = value;
-            return 0;
-        }
-    } else if (!__Pyx_PyErr_GivenExceptionMatches(et, PyExc_StopIteration)) {
-        __Pyx_ErrRestore(et, ev, tb);
-        return -1;
-    }
-    PyErr_NormalizeException(&et, &ev, &tb);
-    if (unlikely(!PyObject_TypeCheck(ev, (PyTypeObject*)PyExc_StopIteration))) {
-        __Pyx_ErrRestore(et, ev, tb);
-        return -1;
-    }
-    Py_XDECREF(tb);
-    Py_DECREF(et);
-#if PY_VERSION_HEX >= 0x030300A0
-    value = ((PyStopIterationObject *)ev)->value;
-    Py_INCREF(value);
-    Py_DECREF(ev);
-#else
-    {
-        PyObject* args = __Pyx_PyObject_GetAttrStr(ev, __pyx_n_s_args);
-        Py_DECREF(ev);
-        if (likely(args)) {
-            value = PySequence_GetItem(args, 0);
-            Py_DECREF(args);
-        }
-        if (unlikely(!value)) {
-            __Pyx_ErrRestore(NULL, NULL, NULL);
-            Py_INCREF(Py_None);
-            value = Py_None;
-        }
-    }
-#endif
-    *pvalue = value;
-    return 0;
-}
-static CYTHON_INLINE
-void __Pyx_Coroutine_ExceptionClear(__pyx_CoroutineObject *self) {
-    PyObject *exc_type = self->exc_type;
-    PyObject *exc_value = self->exc_value;
-    PyObject *exc_traceback = self->exc_traceback;
-    self->exc_type = NULL;
-    self->exc_value = NULL;
-    self->exc_traceback = NULL;
-    Py_XDECREF(exc_type);
-    Py_XDECREF(exc_value);
-    Py_XDECREF(exc_traceback);
-}
-#define __Pyx_Coroutine_AlreadyRunningError(gen)  (__Pyx__Coroutine_AlreadyRunningError(gen), (PyObject*)NULL)
-static void __Pyx__Coroutine_AlreadyRunningError(CYTHON_UNUSED __pyx_CoroutineObject *gen) {
-    const char *msg;
-    if (0) {
-    #ifdef __Pyx_Coroutine_USED
-    } else if (__Pyx_Coroutine_Check((PyObject*)gen)) {
-        msg = "coroutine already executing";
-    #endif
-    #ifdef __Pyx_AsyncGen_USED
-    } else if (__Pyx_AsyncGen_CheckExact((PyObject*)gen)) {
-        msg = "async generator already executing";
-    #endif
-    } else {
-        msg = "generator already executing";
-    }
-    PyErr_SetString(PyExc_ValueError, msg);
-}
-#define __Pyx_Coroutine_NotStartedError(gen)  (__Pyx__Coroutine_NotStartedError(gen), (PyObject*)NULL)
-static void __Pyx__Coroutine_NotStartedError(CYTHON_UNUSED PyObject *gen) {
-    const char *msg;
-    if (0) {
-    #ifdef __Pyx_Coroutine_USED
-    } else if (__Pyx_Coroutine_Check(gen)) {
-        msg = "can't send non-None value to a just-started coroutine";
-    #endif
-    #ifdef __Pyx_AsyncGen_USED
-    } else if (__Pyx_AsyncGen_CheckExact(gen)) {
-        msg = "can't send non-None value to a just-started async generator";
-    #endif
-    } else {
-        msg = "can't send non-None value to a just-started generator";
-    }
-    PyErr_SetString(PyExc_TypeError, msg);
-}
-#define __Pyx_Coroutine_AlreadyTerminatedError(gen, value, closing)  (__Pyx__Coroutine_AlreadyTerminatedError(gen, value, closing), (PyObject*)NULL)
-static void __Pyx__Coroutine_AlreadyTerminatedError(CYTHON_UNUSED PyObject *gen, PyObject *value, CYTHON_UNUSED int closing) {
-    #ifdef __Pyx_Coroutine_USED
-    if (!closing && __Pyx_Coroutine_Check(gen)) {
-        PyErr_SetString(PyExc_RuntimeError, "cannot reuse already awaited coroutine");
-    } else
-    #endif
-    if (value) {
-        #ifdef __Pyx_AsyncGen_USED
-        if (__Pyx_AsyncGen_CheckExact(gen))
-            PyErr_SetNone(__Pyx_PyExc_StopAsyncIteration);
-        else
-        #endif
-        PyErr_SetNone(PyExc_StopIteration);
-    }
-}
-static
-PyObject *__Pyx_Coroutine_SendEx(__pyx_CoroutineObject *self, PyObject *value, int closing) {
-    __Pyx_PyThreadState_declare
-    PyThreadState *tstate;
-    PyObject *retval;
-    assert(!self->is_running);
-    if (unlikely(self->resume_label == 0)) {
-        if (unlikely(value && value != Py_None)) {
-            return __Pyx_Coroutine_NotStartedError((PyObject*)self);
-        }
-    }
-    if (unlikely(self->resume_label == -1)) {
-        return __Pyx_Coroutine_AlreadyTerminatedError((PyObject*)self, value, closing);
-    }
-#if CYTHON_FAST_THREAD_STATE
-    __Pyx_PyThreadState_assign
-    tstate = __pyx_tstate;
-#else
-    tstate = __Pyx_PyThreadState_Current;
-#endif
-    if (self->exc_type) {
-#if CYTHON_COMPILING_IN_PYPY || CYTHON_COMPILING_IN_PYSTON
-#else
-        if (self->exc_traceback) {
-            PyTracebackObject *tb = (PyTracebackObject *) self->exc_traceback;
-            PyFrameObject *f = tb->tb_frame;
-            Py_XINCREF(tstate->frame);
-            assert(f->f_back == NULL);
-            f->f_back = tstate->frame;
-        }
-#endif
-        __Pyx_ExceptionSwap(&self->exc_type, &self->exc_value,
-                            &self->exc_traceback);
-    } else {
-        __Pyx_Coroutine_ExceptionClear(self);
-        __Pyx_ExceptionSave(&self->exc_type, &self->exc_value, &self->exc_traceback);
-    }
-    self->is_running = 1;
-    retval = self->body((PyObject *) self, tstate, value);
-    self->is_running = 0;
-    return retval;
-}
-static CYTHON_INLINE void __Pyx_Coroutine_ResetFrameBackpointer(__pyx_CoroutineObject *self) {
-    if (likely(self->exc_traceback)) {
-#if CYTHON_COMPILING_IN_PYPY || CYTHON_COMPILING_IN_PYSTON
-#else
-        PyTracebackObject *tb = (PyTracebackObject *) self->exc_traceback;
-        PyFrameObject *f = tb->tb_frame;
-        Py_CLEAR(f->f_back);
-#endif
-    }
-}
-static CYTHON_INLINE
-PyObject *__Pyx_Coroutine_MethodReturn(CYTHON_UNUSED PyObject* gen, PyObject *retval) {
-    if (unlikely(!retval)) {
-        __Pyx_PyThreadState_declare
-        __Pyx_PyThreadState_assign
-        if (!__Pyx_PyErr_Occurred()) {
-            PyObject *exc = PyExc_StopIteration;
-            #ifdef __Pyx_AsyncGen_USED
-            if (__Pyx_AsyncGen_CheckExact(gen))
-                exc = __Pyx_PyExc_StopAsyncIteration;
-            #endif
-            __Pyx_PyErr_SetNone(exc);
-        }
-    }
-    return retval;
-}
-static CYTHON_INLINE
-PyObject *__Pyx_Coroutine_FinishDelegation(__pyx_CoroutineObject *gen) {
-    PyObject *ret;
-    PyObject *val = NULL;
-    __Pyx_Coroutine_Undelegate(gen);
-    __Pyx_PyGen__FetchStopIterationValue(__Pyx_PyThreadState_Current, &val);
-    ret = __Pyx_Coroutine_SendEx(gen, val, 0);
-    Py_XDECREF(val);
-    return ret;
-}
-static PyObject *__Pyx_Coroutine_Send(PyObject *self, PyObject *value) {
-    PyObject *retval;
-    __pyx_CoroutineObject *gen = (__pyx_CoroutineObject*) self;
-    PyObject *yf = gen->yieldfrom;
-    if (unlikely(gen->is_running))
-        return __Pyx_Coroutine_AlreadyRunningError(gen);
-    if (yf) {
-        PyObject *ret;
-        gen->is_running = 1;
-        #ifdef __Pyx_Generator_USED
-        if (__Pyx_Generator_CheckExact(yf)) {
-            ret = __Pyx_Coroutine_Send(yf, value);
-        } else
-        #endif
-        #ifdef __Pyx_Coroutine_USED
-        if (__Pyx_Coroutine_Check(yf)) {
-            ret = __Pyx_Coroutine_Send(yf, value);
-        } else
-        #endif
-        #ifdef __Pyx_AsyncGen_USED
-        if (__pyx_PyAsyncGenASend_CheckExact(yf)) {
-            ret = __Pyx_async_gen_asend_send(yf, value);
-        } else
-        #endif
-        #if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x03030000 && (defined(__linux__) || PY_VERSION_HEX >= 0x030600B3)
-        if (PyGen_CheckExact(yf)) {
-            ret = _PyGen_Send((PyGenObject*)yf, value == Py_None ? NULL : value);
-        } else
-        #endif
-        #if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x03050000 && defined(PyCoro_CheckExact) && (defined(__linux__) || PY_VERSION_HEX >= 0x030600B3)
-        if (PyCoro_CheckExact(yf)) {
-            ret = _PyGen_Send((PyGenObject*)yf, value == Py_None ? NULL : value);
-        } else
-        #endif
-        {
-            if (value == Py_None)
-                ret = Py_TYPE(yf)->tp_iternext(yf);
-            else
-                ret = __Pyx_PyObject_CallMethod1(yf, __pyx_n_s_send, value);
-        }
-        gen->is_running = 0;
-        if (likely(ret)) {
-            return ret;
-        }
-        retval = __Pyx_Coroutine_FinishDelegation(gen);
-    } else {
-        retval = __Pyx_Coroutine_SendEx(gen, value, 0);
-    }
-    return __Pyx_Coroutine_MethodReturn(self, retval);
-}
-static int __Pyx_Coroutine_CloseIter(__pyx_CoroutineObject *gen, PyObject *yf) {
-    PyObject *retval = NULL;
-    int err = 0;
-    #ifdef __Pyx_Generator_USED
-    if (__Pyx_Generator_CheckExact(yf)) {
-        retval = __Pyx_Coroutine_Close(yf);
-        if (!retval)
-            return -1;
-    } else
-    #endif
-    #ifdef __Pyx_Coroutine_USED
-    if (__Pyx_Coroutine_Check(yf)) {
-        retval = __Pyx_Coroutine_Close(yf);
-        if (!retval)
-            return -1;
-    } else
-    if (__Pyx_CoroutineAwait_CheckExact(yf)) {
-        retval = __Pyx_CoroutineAwait_Close((__pyx_CoroutineAwaitObject*)yf);
-        if (!retval)
-            return -1;
-    } else
-    #endif
-    #ifdef __Pyx_AsyncGen_USED
-    if (__pyx_PyAsyncGenASend_CheckExact(yf)) {
-        retval = __Pyx_async_gen_asend_close(yf, NULL);
-    } else
-    if (__pyx_PyAsyncGenAThrow_CheckExact(yf)) {
-        retval = __Pyx_async_gen_athrow_close(yf, NULL);
-    } else
-    #endif
-    {
-        PyObject *meth;
-        gen->is_running = 1;
-        meth = __Pyx_PyObject_GetAttrStr(yf, __pyx_n_s_close);
-        if (unlikely(!meth)) {
-            if (!PyErr_ExceptionMatches(PyExc_AttributeError)) {
-                PyErr_WriteUnraisable(yf);
-            }
-            PyErr_Clear();
-        } else {
-            retval = PyObject_CallFunction(meth, NULL);
-            Py_DECREF(meth);
-            if (!retval)
-                err = -1;
-        }
-        gen->is_running = 0;
-    }
-    Py_XDECREF(retval);
-    return err;
-}
-static PyObject *__Pyx_Generator_Next(PyObject *self) {
-    __pyx_CoroutineObject *gen = (__pyx_CoroutineObject*) self;
-    PyObject *yf = gen->yieldfrom;
-    if (unlikely(gen->is_running))
-        return __Pyx_Coroutine_AlreadyRunningError(gen);
-    if (yf) {
-        PyObject *ret;
-        gen->is_running = 1;
-        #ifdef __Pyx_Generator_USED
-        if (__Pyx_Generator_CheckExact(yf)) {
-            ret = __Pyx_Generator_Next(yf);
-        } else
-        #endif
-        #if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x03030000 && (defined(__linux__) || PY_VERSION_HEX >= 0x030600B3)
-        if (PyGen_CheckExact(yf)) {
-            ret = _PyGen_Send((PyGenObject*)yf, NULL);
-        } else
-        #endif
-        #ifdef __Pyx_Coroutine_USED
-        if (__Pyx_Coroutine_Check(yf)) {
-            ret = __Pyx_Coroutine_Send(yf, Py_None);
-        } else
-        #endif
-            ret = Py_TYPE(yf)->tp_iternext(yf);
-        gen->is_running = 0;
-        if (likely(ret)) {
-            return ret;
-        }
-        return __Pyx_Coroutine_FinishDelegation(gen);
-    }
-    return __Pyx_Coroutine_SendEx(gen, Py_None, 0);
-}
-static PyObject *__Pyx_Coroutine_Close(PyObject *self) {
-    __pyx_CoroutineObject *gen = (__pyx_CoroutineObject *) self;
-    PyObject *retval, *raised_exception;
-    PyObject *yf = gen->yieldfrom;
-    int err = 0;
-    if (unlikely(gen->is_running))
-        return __Pyx_Coroutine_AlreadyRunningError(gen);
-    if (yf) {
-        Py_INCREF(yf);
-        err = __Pyx_Coroutine_CloseIter(gen, yf);
-        __Pyx_Coroutine_Undelegate(gen);
-        Py_DECREF(yf);
-    }
-    if (err == 0)
-        PyErr_SetNone(PyExc_GeneratorExit);
-    retval = __Pyx_Coroutine_SendEx(gen, NULL, 1);
-    if (unlikely(retval)) {
-        const char *msg;
-        Py_DECREF(retval);
-        if ((0)) {
-        #ifdef __Pyx_Coroutine_USED
-        } else if (__Pyx_Coroutine_Check(self)) {
-            msg = "coroutine ignored GeneratorExit";
-        #endif
-        #ifdef __Pyx_AsyncGen_USED
-        } else if (__Pyx_AsyncGen_CheckExact(self)) {
-#if PY_VERSION_HEX < 0x03060000
-            msg = "async generator ignored GeneratorExit - might require Python 3.6+ finalisation (PEP 525)";
-#else
-            msg = "async generator ignored GeneratorExit";
-#endif
-        #endif
-        } else {
-            msg = "generator ignored GeneratorExit";
-        }
-        PyErr_SetString(PyExc_RuntimeError, msg);
-        return NULL;
-    }
-    raised_exception = PyErr_Occurred();
-    if (likely(!raised_exception || __Pyx_PyErr_GivenExceptionMatches2(raised_exception, PyExc_GeneratorExit, PyExc_StopIteration))) {
-        if (raised_exception) PyErr_Clear();
-        Py_INCREF(Py_None);
-        return Py_None;
-    }
-    return NULL;
-}
-static PyObject *__Pyx__Coroutine_Throw(PyObject *self, PyObject *typ, PyObject *val, PyObject *tb,
-                                        PyObject *args, int close_on_genexit) {
-    __pyx_CoroutineObject *gen = (__pyx_CoroutineObject *) self;
-    PyObject *yf = gen->yieldfrom;
-    if (unlikely(gen->is_running))
-        return __Pyx_Coroutine_AlreadyRunningError(gen);
-    if (yf) {
-        PyObject *ret;
-        Py_INCREF(yf);
-        if (__Pyx_PyErr_GivenExceptionMatches(typ, PyExc_GeneratorExit) && close_on_genexit) {
-            int err = __Pyx_Coroutine_CloseIter(gen, yf);
-            Py_DECREF(yf);
-            __Pyx_Coroutine_Undelegate(gen);
-            if (err < 0)
-                return __Pyx_Coroutine_MethodReturn(self, __Pyx_Coroutine_SendEx(gen, NULL, 0));
-            goto throw_here;
-        }
-        gen->is_running = 1;
-        if (0
-        #ifdef __Pyx_Generator_USED
-            || __Pyx_Generator_CheckExact(yf)
-        #endif
-        #ifdef __Pyx_Coroutine_USED
-            || __Pyx_Coroutine_Check(yf)
-        #endif
-            ) {
-            ret = __Pyx__Coroutine_Throw(yf, typ, val, tb, args, close_on_genexit);
-        #ifdef __Pyx_Coroutine_USED
-        } else if (__Pyx_CoroutineAwait_CheckExact(yf)) {
-            ret = __Pyx__Coroutine_Throw(((__pyx_CoroutineAwaitObject*)yf)->coroutine, typ, val, tb, args, close_on_genexit);
-        #endif
-        } else {
-            PyObject *meth = __Pyx_PyObject_GetAttrStr(yf, __pyx_n_s_throw);
-            if (unlikely(!meth)) {
-                Py_DECREF(yf);
-                if (!PyErr_ExceptionMatches(PyExc_AttributeError)) {
-                    gen->is_running = 0;
-                    return NULL;
-                }
-                PyErr_Clear();
-                __Pyx_Coroutine_Undelegate(gen);
-                gen->is_running = 0;
-                goto throw_here;
-            }
-            if (likely(args)) {
-                ret = PyObject_CallObject(meth, args);
-            } else {
-                ret = PyObject_CallFunctionObjArgs(meth, typ, val, tb, NULL);
-            }
-            Py_DECREF(meth);
-        }
-        gen->is_running = 0;
-        Py_DECREF(yf);
-        if (!ret) {
-            ret = __Pyx_Coroutine_FinishDelegation(gen);
-        }
-        return __Pyx_Coroutine_MethodReturn(self, ret);
-    }
-throw_here:
-    __Pyx_Raise(typ, val, tb, NULL);
-    return __Pyx_Coroutine_MethodReturn(self, __Pyx_Coroutine_SendEx(gen, NULL, 0));
-}
-static PyObject *__Pyx_Coroutine_Throw(PyObject *self, PyObject *args) {
-    PyObject *typ;
-    PyObject *val = NULL;
-    PyObject *tb = NULL;
-    if (!PyArg_UnpackTuple(args, (char *)"throw", 1, 3, &typ, &val, &tb))
-        return NULL;
-    return __Pyx__Coroutine_Throw(self, typ, val, tb, args, 1);
-}
-static int __Pyx_Coroutine_traverse(__pyx_CoroutineObject *gen, visitproc visit, void *arg) {
-    Py_VISIT(gen->closure);
-    Py_VISIT(gen->classobj);
-    Py_VISIT(gen->yieldfrom);
-    Py_VISIT(gen->exc_type);
-    Py_VISIT(gen->exc_value);
-    Py_VISIT(gen->exc_traceback);
-    return 0;
-}
-static int __Pyx_Coroutine_clear(PyObject *self) {
-    __pyx_CoroutineObject *gen = (__pyx_CoroutineObject *) self;
-    Py_CLEAR(gen->closure);
-    Py_CLEAR(gen->classobj);
-    Py_CLEAR(gen->yieldfrom);
-    Py_CLEAR(gen->exc_type);
-    Py_CLEAR(gen->exc_value);
-    Py_CLEAR(gen->exc_traceback);
-#ifdef __Pyx_AsyncGen_USED
-    if (__Pyx_AsyncGen_CheckExact(self)) {
-        Py_CLEAR(((__pyx_PyAsyncGenObject*)gen)->ag_finalizer);
-    }
-#endif
-    Py_CLEAR(gen->gi_code);
-    Py_CLEAR(gen->gi_name);
-    Py_CLEAR(gen->gi_qualname);
-    Py_CLEAR(gen->gi_modulename);
-    return 0;
-}
-static void __Pyx_Coroutine_dealloc(PyObject *self) {
-    __pyx_CoroutineObject *gen = (__pyx_CoroutineObject *) self;
-    PyObject_GC_UnTrack(gen);
-    if (gen->gi_weakreflist != NULL)
-        PyObject_ClearWeakRefs(self);
-    if (gen->resume_label >= 0) {
-        PyObject_GC_Track(self);
-#if PY_VERSION_HEX >= 0x030400a1 && CYTHON_USE_TP_FINALIZE
-        if (PyObject_CallFinalizerFromDealloc(self))
-#else
-        Py_TYPE(gen)->tp_del(self);
-        if (self->ob_refcnt > 0)
-#endif
-        {
-            return;
-        }
-        PyObject_GC_UnTrack(self);
-    }
-#ifdef __Pyx_AsyncGen_USED
-    if (__Pyx_AsyncGen_CheckExact(self)) {
-        /* We have to handle this case for asynchronous generators
-           right here, because this code has to be between UNTRACK
-           and GC_Del. */
-        Py_CLEAR(((__pyx_PyAsyncGenObject*)self)->ag_finalizer);
-    }
-#endif
-    __Pyx_Coroutine_clear(self);
-    PyObject_GC_Del(gen);
-}
-static void __Pyx_Coroutine_del(PyObject *self) {
-    PyObject *error_type, *error_value, *error_traceback;
-    __pyx_CoroutineObject *gen = (__pyx_CoroutineObject *) self;
-    __Pyx_PyThreadState_declare
-    if (gen->resume_label < 0) {
-        return;
-    }
-#if !CYTHON_USE_TP_FINALIZE
-    assert(self->ob_refcnt == 0);
-    self->ob_refcnt = 1;
-#endif
-    __Pyx_PyThreadState_assign
-    __Pyx_ErrFetch(&error_type, &error_value, &error_traceback);
-#ifdef __Pyx_AsyncGen_USED
-    if (__Pyx_AsyncGen_CheckExact(self)) {
-        __pyx_PyAsyncGenObject *agen = (__pyx_PyAsyncGenObject*)self;
-        PyObject *finalizer = agen->ag_finalizer;
-        if (finalizer && !agen->ag_closed) {
-            PyObject *res = __Pyx_PyObject_CallOneArg(finalizer, self);
-            if (unlikely(!res)) {
-                PyErr_WriteUnraisable(self);
-            } else {
-                Py_DECREF(res);
-            }
-            __Pyx_ErrRestore(error_type, error_value, error_traceback);
-            return;
-        }
-    }
-#endif
-    if (unlikely(gen->resume_label == 0 && !error_value)) {
-#ifdef __Pyx_Coroutine_USED
-#ifdef __Pyx_Generator_USED
-    if (!__Pyx_Generator_CheckExact(self))
-#endif
-        {
-        PyObject_GC_UnTrack(self);
-#if PY_MAJOR_VERSION >= 3  || defined(PyErr_WarnFormat)
-        if (unlikely(PyErr_WarnFormat(PyExc_RuntimeWarning, 1, "coroutine '%.50S' was never awaited", gen->gi_qualname) < 0))
-            PyErr_WriteUnraisable(self);
-#else
-        {PyObject *msg;
-        char *cmsg;
-        #if CYTHON_COMPILING_IN_PYPY
-        msg = NULL;
-        cmsg = (char*) "coroutine was never awaited";
-        #else
-        char *cname;
-        PyObject *qualname;
-        qualname = gen->gi_qualname;
-        cname = PyString_AS_STRING(qualname);
-        msg = PyString_FromFormat("coroutine '%.50s' was never awaited", cname);
-        if (unlikely(!msg)) {
-            PyErr_Clear();
-            cmsg = (char*) "coroutine was never awaited";
-        } else {
-            cmsg = PyString_AS_STRING(msg);
-        }
-        #endif
-        if (unlikely(PyErr_WarnEx(PyExc_RuntimeWarning, cmsg, 1) < 0))
-            PyErr_WriteUnraisable(self);
-        Py_XDECREF(msg);}
-#endif
-        PyObject_GC_Track(self);
-        }
-#endif
-    } else {
-        PyObject *res = __Pyx_Coroutine_Close(self);
-        if (unlikely(!res)) {
-            if (PyErr_Occurred())
-                PyErr_WriteUnraisable(self);
-        } else {
-            Py_DECREF(res);
-        }
-    }
-    __Pyx_ErrRestore(error_type, error_value, error_traceback);
-#if !CYTHON_USE_TP_FINALIZE
-    assert(self->ob_refcnt > 0);
-    if (--self->ob_refcnt == 0) {
-        return;
-    }
-    {
-        Py_ssize_t refcnt = self->ob_refcnt;
-        _Py_NewReference(self);
-        self->ob_refcnt = refcnt;
-    }
-#if CYTHON_COMPILING_IN_CPYTHON
-    assert(PyType_IS_GC(self->ob_type) &&
-           _Py_AS_GC(self)->gc.gc_refs != _PyGC_REFS_UNTRACKED);
-    _Py_DEC_REFTOTAL;
-#endif
-#ifdef COUNT_ALLOCS
-    --Py_TYPE(self)->tp_frees;
-    --Py_TYPE(self)->tp_allocs;
-#endif
-#endif
-}
-static PyObject *
-__Pyx_Coroutine_get_name(__pyx_CoroutineObject *self)
-{
-    PyObject *name = self->gi_name;
-    if (unlikely(!name)) name = Py_None;
-    Py_INCREF(name);
-    return name;
-}
-static int
-__Pyx_Coroutine_set_name(__pyx_CoroutineObject *self, PyObject *value)
-{
-    PyObject *tmp;
-#if PY_MAJOR_VERSION >= 3
-    if (unlikely(value == NULL || !PyUnicode_Check(value))) {
-#else
-    if (unlikely(value == NULL || !PyString_Check(value))) {
-#endif
-        PyErr_SetString(PyExc_TypeError,
-                        "__name__ must be set to a string object");
-        return -1;
-    }
-    tmp = self->gi_name;
-    Py_INCREF(value);
-    self->gi_name = value;
-    Py_XDECREF(tmp);
-    return 0;
-}
-static PyObject *
-__Pyx_Coroutine_get_qualname(__pyx_CoroutineObject *self)
-{
-    PyObject *name = self->gi_qualname;
-    if (unlikely(!name)) name = Py_None;
-    Py_INCREF(name);
-    return name;
-}
-static int
-__Pyx_Coroutine_set_qualname(__pyx_CoroutineObject *self, PyObject *value)
-{
-    PyObject *tmp;
-#if PY_MAJOR_VERSION >= 3
-    if (unlikely(value == NULL || !PyUnicode_Check(value))) {
-#else
-    if (unlikely(value == NULL || !PyString_Check(value))) {
-#endif
-        PyErr_SetString(PyExc_TypeError,
-                        "__qualname__ must be set to a string object");
-        return -1;
-    }
-    tmp = self->gi_qualname;
-    Py_INCREF(value);
-    self->gi_qualname = value;
-    Py_XDECREF(tmp);
-    return 0;
-}
-static __pyx_CoroutineObject *__Pyx__Coroutine_New(
-            PyTypeObject* type, __pyx_coroutine_body_t body, PyObject *code, PyObject *closure,
-            PyObject *name, PyObject *qualname, PyObject *module_name) {
-    __pyx_CoroutineObject *gen = PyObject_GC_New(__pyx_CoroutineObject, type);
-    if (unlikely(!gen))
-        return NULL;
-    return __Pyx__Coroutine_NewInit(gen, body, code, closure, name, qualname, module_name);
-}
-static __pyx_CoroutineObject *__Pyx__Coroutine_NewInit(
-            __pyx_CoroutineObject *gen, __pyx_coroutine_body_t body, PyObject *code, PyObject *closure,
-            PyObject *name, PyObject *qualname, PyObject *module_name) {
-    gen->body = body;
-    gen->closure = closure;
-    Py_XINCREF(closure);
-    gen->is_running = 0;
-    gen->resume_label = 0;
-    gen->classobj = NULL;
-    gen->yieldfrom = NULL;
-    gen->exc_type = NULL;
-    gen->exc_value = NULL;
-    gen->exc_traceback = NULL;
-    gen->gi_weakreflist = NULL;
-    Py_XINCREF(qualname);
-    gen->gi_qualname = qualname;
-    Py_XINCREF(name);
-    gen->gi_name = name;
-    Py_XINCREF(module_name);
-    gen->gi_modulename = module_name;
-    Py_XINCREF(code);
-    gen->gi_code = code;
-    PyObject_GC_Track(gen);
-    return gen;
-}
-
-/* PatchModuleWithCoroutine */
-            static PyObject* __Pyx_Coroutine_patch_module(PyObject* module, const char* py_code) {
-#if defined(__Pyx_Generator_USED) || defined(__Pyx_Coroutine_USED)
-    int result;
-    PyObject *globals, *result_obj;
-    globals = PyDict_New();  if (unlikely(!globals)) goto ignore;
-    result = PyDict_SetItemString(globals, "_cython_coroutine_type",
-    #ifdef __Pyx_Coroutine_USED
-        (PyObject*)__pyx_CoroutineType);
-    #else
-        Py_None);
-    #endif
-    if (unlikely(result < 0)) goto ignore;
-    result = PyDict_SetItemString(globals, "_cython_generator_type",
-    #ifdef __Pyx_Generator_USED
-        (PyObject*)__pyx_GeneratorType);
-    #else
-        Py_None);
-    #endif
-    if (unlikely(result < 0)) goto ignore;
-    if (unlikely(PyDict_SetItemString(globals, "_module", module) < 0)) goto ignore;
-    if (unlikely(PyDict_SetItemString(globals, "__builtins__", __pyx_b) < 0)) goto ignore;
-    result_obj = PyRun_String(py_code, Py_file_input, globals, globals);
-    if (unlikely(!result_obj)) goto ignore;
-    Py_DECREF(result_obj);
-    Py_DECREF(globals);
-    return module;
-ignore:
-    Py_XDECREF(globals);
-    PyErr_WriteUnraisable(module);
-    if (unlikely(PyErr_WarnEx(PyExc_RuntimeWarning, "Cython module failed to patch module with custom type", 1) < 0)) {
-        Py_DECREF(module);
-        module = NULL;
-    }
-#else
-    py_code++;
-#endif
-    return module;
-}
-
-/* PatchGeneratorABC */
-            #ifndef CYTHON_REGISTER_ABCS
-#define CYTHON_REGISTER_ABCS 1
-#endif
-#if defined(__Pyx_Generator_USED) || defined(__Pyx_Coroutine_USED)
-static PyObject* __Pyx_patch_abc_module(PyObject *module);
-static PyObject* __Pyx_patch_abc_module(PyObject *module) {
-    module = __Pyx_Coroutine_patch_module(
-        module, ""
-"if _cython_generator_type is not None:\n"
-"    try: Generator = _module.Generator\n"
-"    except AttributeError: pass\n"
-"    else: Generator.register(_cython_generator_type)\n"
-"if _cython_coroutine_type is not None:\n"
-"    try: Coroutine = _module.Coroutine\n"
-"    except AttributeError: pass\n"
-"    else: Coroutine.register(_cython_coroutine_type)\n"
-    );
-    return module;
-}
-#endif
-static int __Pyx_patch_abc(void) {
-#if defined(__Pyx_Generator_USED) || defined(__Pyx_Coroutine_USED)
-    static int abc_patched = 0;
-    if (CYTHON_REGISTER_ABCS && !abc_patched) {
-        PyObject *module;
-        module = PyImport_ImportModule((PY_MAJOR_VERSION >= 3) ? "collections.abc" : "collections");
-        if (!module) {
-            PyErr_WriteUnraisable(NULL);
-            if (unlikely(PyErr_WarnEx(PyExc_RuntimeWarning,
-                    ((PY_MAJOR_VERSION >= 3) ?
-                        "Cython module failed to register with collections.abc module" :
-                        "Cython module failed to register with collections module"), 1) < 0)) {
-                return -1;
-            }
-        } else {
-            module = __Pyx_patch_abc_module(module);
-            abc_patched = 1;
-            if (unlikely(!module))
-                return -1;
-            Py_DECREF(module);
-        }
-        module = PyImport_ImportModule("backports_abc");
-        if (module) {
-            module = __Pyx_patch_abc_module(module);
-            Py_XDECREF(module);
-        }
-        if (!module) {
-            PyErr_Clear();
-        }
-    }
-#else
-    if ((0)) __Pyx_Coroutine_patch_module(NULL, NULL);
-#endif
-    return 0;
-}
-
-/* Generator */
-            static PyMethodDef __pyx_Generator_methods[] = {
-    {"send", (PyCFunction) __Pyx_Coroutine_Send, METH_O,
-     (char*) PyDoc_STR("send(arg) -> send 'arg' into generator,\nreturn next yielded value or raise StopIteration.")},
-    {"throw", (PyCFunction) __Pyx_Coroutine_Throw, METH_VARARGS,
-     (char*) PyDoc_STR("throw(typ[,val[,tb]]) -> raise exception in generator,\nreturn next yielded value or raise StopIteration.")},
-    {"close", (PyCFunction) __Pyx_Coroutine_Close, METH_NOARGS,
-     (char*) PyDoc_STR("close() -> raise GeneratorExit inside generator.")},
-    {0, 0, 0, 0}
-};
-static PyMemberDef __pyx_Generator_memberlist[] = {
-    {(char *) "gi_running", T_BOOL, offsetof(__pyx_CoroutineObject, is_running), READONLY, NULL},
-    {(char*) "gi_yieldfrom", T_OBJECT, offsetof(__pyx_CoroutineObject, yieldfrom), READONLY,
-     (char*) PyDoc_STR("object being iterated by 'yield from', or None")},
-    {(char*) "gi_code", T_OBJECT, offsetof(__pyx_CoroutineObject, gi_code), READONLY, NULL},
-    {0, 0, 0, 0, 0}
-};
-static PyGetSetDef __pyx_Generator_getsets[] = {
-    {(char *) "__name__", (getter)__Pyx_Coroutine_get_name, (setter)__Pyx_Coroutine_set_name,
-     (char*) PyDoc_STR("name of the generator"), 0},
-    {(char *) "__qualname__", (getter)__Pyx_Coroutine_get_qualname, (setter)__Pyx_Coroutine_set_qualname,
-     (char*) PyDoc_STR("qualified name of the generator"), 0},
-    {0, 0, 0, 0, 0}
-};
-static PyTypeObject __pyx_GeneratorType_type = {
-    PyVarObject_HEAD_INIT(0, 0)
-    "generator",
-    sizeof(__pyx_CoroutineObject),
-    0,
-    (destructor) __Pyx_Coroutine_dealloc,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | Py_TPFLAGS_HAVE_FINALIZE,
-    0,
-    (traverseproc) __Pyx_Coroutine_traverse,
-    0,
-    0,
-    offsetof(__pyx_CoroutineObject, gi_weakreflist),
-    0,
-    (iternextfunc) __Pyx_Generator_Next,
-    __pyx_Generator_methods,
-    __pyx_Generator_memberlist,
-    __pyx_Generator_getsets,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-#if CYTHON_USE_TP_FINALIZE
-    0,
-#else
-    __Pyx_Coroutine_del,
-#endif
-    0,
-#if CYTHON_USE_TP_FINALIZE
-    __Pyx_Coroutine_del,
-#elif PY_VERSION_HEX >= 0x030400a1
-    0,
-#endif
-};
-static int __pyx_Generator_init(void) {
-    __pyx_GeneratorType_type.tp_getattro = __Pyx_PyObject_GenericGetAttrNoDict;
-    __pyx_GeneratorType_type.tp_iter = PyObject_SelfIter;
-    __pyx_GeneratorType = __Pyx_FetchCommonType(&__pyx_GeneratorType_type);
-    if (unlikely(!__pyx_GeneratorType)) {
-        return -1;
-    }
-    return 0;
-}
-
-/* CheckBinaryVersion */
-            static int __Pyx_check_binary_version(void) {
-    char ctversion[4], rtversion[4];
-    PyOS_snprintf(ctversion, 4, "%d.%d", PY_MAJOR_VERSION, PY_MINOR_VERSION);
-    PyOS_snprintf(rtversion, 4, "%s", Py_GetVersion());
-    if (ctversion[0] != rtversion[0] || ctversion[2] != rtversion[2]) {
-        char message[200];
-        PyOS_snprintf(message, sizeof(message),
-                      "compiletime version %s of module '%.100s' "
-                      "does not match runtime version %s",
-                      ctversion, __Pyx_MODULE_NAME, rtversion);
-        return PyErr_WarnEx(NULL, message, 1);
-    }
-    return 0;
-}
-
-/* VoidPtrExport */
-            static int __Pyx_ExportVoidPtr(PyObject *name, void *p, const char *sig) {
-    PyObject *d;
-    PyObject *cobj = 0;
-    d = PyDict_GetItem(__pyx_d, __pyx_n_s_pyx_capi);
-    Py_XINCREF(d);
-    if (!d) {
-        d = PyDict_New();
-        if (!d)
-            goto bad;
-        if (__Pyx_PyObject_SetAttrStr(__pyx_m, __pyx_n_s_pyx_capi, d) < 0)
-            goto bad;
-    }
-#if PY_VERSION_HEX >= 0x02070000
-    cobj = PyCapsule_New(p, sig, 0);
-#else
-    cobj = PyCObject_FromVoidPtrAndDesc(p, (void *)sig, 0);
-#endif
-    if (!cobj)
-        goto bad;
-    if (PyDict_SetItem(d, name, cobj) < 0)
-        goto bad;
-    Py_DECREF(cobj);
-    Py_DECREF(d);
-    return 0;
-bad:
-    Py_XDECREF(cobj);
-    Py_XDECREF(d);
-    return -1;
-}
-
-/* FunctionExport */
-            static int __Pyx_ExportFunction(const char *name, void (*f)(void), const char *sig) {
-    PyObject *d = 0;
-    PyObject *cobj = 0;
-    union {
-        void (*fp)(void);
-        void *p;
-    } tmp;
-    d = PyObject_GetAttrString(__pyx_m, (char *)"__pyx_capi__");
-    if (!d) {
-        PyErr_Clear();
-        d = PyDict_New();
-        if (!d)
-            goto bad;
-        Py_INCREF(d);
-        if (PyModule_AddObject(__pyx_m, (char *)"__pyx_capi__", d) < 0)
-            goto bad;
-    }
-    tmp.fp = f;
-#if PY_VERSION_HEX >= 0x02070000
-    cobj = PyCapsule_New(tmp.p, sig, 0);
-#else
-    cobj = PyCObject_FromVoidPtrAndDesc(tmp.p, (void *)sig, 0);
-#endif
-    if (!cobj)
-        goto bad;
-    if (PyDict_SetItemString(d, name, cobj) < 0)
-        goto bad;
-    Py_DECREF(cobj);
-    Py_DECREF(d);
-    return 0;
-bad:
-    Py_XDECREF(cobj);
-    Py_XDECREF(d);
-    return -1;
-}
-
-/* InitStrings */
-            static int __Pyx_InitStrings(__Pyx_StringTabEntry *t) {
-    while (t->p) {
-        #if PY_MAJOR_VERSION < 3
-        if (t->is_unicode) {
-            *t->p = PyUnicode_DecodeUTF8(t->s, t->n - 1, NULL);
-        } else if (t->intern) {
-            *t->p = PyString_InternFromString(t->s);
-        } else {
-            *t->p = PyString_FromStringAndSize(t->s, t->n - 1);
-        }
-        #else
-        if (t->is_unicode | t->is_str) {
-            if (t->intern) {
-                *t->p = PyUnicode_InternFromString(t->s);
-            } else if (t->encoding) {
-                *t->p = PyUnicode_Decode(t->s, t->n - 1, t->encoding, NULL);
-            } else {
-                *t->p = PyUnicode_FromStringAndSize(t->s, t->n - 1);
-            }
-        } else {
-            *t->p = PyBytes_FromStringAndSize(t->s, t->n - 1);
-        }
-        #endif
-        if (!*t->p)
-            return -1;
-        if (PyObject_Hash(*t->p) == -1)
-            return -1;
-        ++t;
-    }
-    return 0;
-}
-
-static CYTHON_INLINE PyObject* __Pyx_PyUnicode_FromString(const char* c_str) {
-    return __Pyx_PyUnicode_FromStringAndSize(c_str, (Py_ssize_t)strlen(c_str));
-}
-static CYTHON_INLINE const char* __Pyx_PyObject_AsString(PyObject* o) {
-    Py_ssize_t ignore;
-    return __Pyx_PyObject_AsStringAndSize(o, &ignore);
-}
-#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII || __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT
-#if !CYTHON_PEP393_ENABLED
-static const char* __Pyx_PyUnicode_AsStringAndSize(PyObject* o, Py_ssize_t *length) {
-    char* defenc_c;
-    PyObject* defenc = _PyUnicode_AsDefaultEncodedString(o, NULL);
-    if (!defenc) return NULL;
-    defenc_c = PyBytes_AS_STRING(defenc);
-#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII
-    {
-        char* end = defenc_c + PyBytes_GET_SIZE(defenc);
-        char* c;
-        for (c = defenc_c; c < end; c++) {
-            if ((unsigned char) (*c) >= 128) {
-                PyUnicode_AsASCIIString(o);
-                return NULL;
-            }
-        }
-    }
-#endif
-    *length = PyBytes_GET_SIZE(defenc);
-    return defenc_c;
-}
-#else
-static CYTHON_INLINE const char* __Pyx_PyUnicode_AsStringAndSize(PyObject* o, Py_ssize_t *length) {
-    if (unlikely(__Pyx_PyUnicode_READY(o) == -1)) return NULL;
-#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII
-    if (likely(PyUnicode_IS_ASCII(o))) {
-        *length = PyUnicode_GET_LENGTH(o);
-        return PyUnicode_AsUTF8(o);
-    } else {
-        PyUnicode_AsASCIIString(o);
-        return NULL;
-    }
-#else
-    return PyUnicode_AsUTF8AndSize(o, length);
-#endif
-}
-#endif
-#endif
-static CYTHON_INLINE const char* __Pyx_PyObject_AsStringAndSize(PyObject* o, Py_ssize_t *length) {
-#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII || __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT
-    if (
-#if PY_MAJOR_VERSION < 3 && __PYX_DEFAULT_STRING_ENCODING_IS_ASCII
-            __Pyx_sys_getdefaultencoding_not_ascii &&
-#endif
-            PyUnicode_Check(o)) {
-        return __Pyx_PyUnicode_AsStringAndSize(o, length);
-    } else
-#endif
-#if (!CYTHON_COMPILING_IN_PYPY) || (defined(PyByteArray_AS_STRING) && defined(PyByteArray_GET_SIZE))
-    if (PyByteArray_Check(o)) {
-        *length = PyByteArray_GET_SIZE(o);
-        return PyByteArray_AS_STRING(o);
-    } else
-#endif
-    {
-        char* result;
-        int r = PyBytes_AsStringAndSize(o, &result, length);
-        if (unlikely(r < 0)) {
-            return NULL;
-        } else {
-            return result;
-        }
-    }
-}
-static CYTHON_INLINE int __Pyx_PyObject_IsTrue(PyObject* x) {
-   int is_true = x == Py_True;
-   if (is_true | (x == Py_False) | (x == Py_None)) return is_true;
-   else return PyObject_IsTrue(x);
-}
-static PyObject* __Pyx_PyNumber_IntOrLongWrongResultType(PyObject* result, const char* type_name) {
-#if PY_MAJOR_VERSION >= 3
-    if (PyLong_Check(result)) {
-        if (PyErr_WarnFormat(PyExc_DeprecationWarning, 1,
-                "__int__ returned non-int (type %.200s).  "
-                "The ability to return an instance of a strict subclass of int "
-                "is deprecated, and may be removed in a future version of Python.",
-                Py_TYPE(result)->tp_name)) {
-            Py_DECREF(result);
-            return NULL;
-        }
-        return result;
-    }
-#endif
-    PyErr_Format(PyExc_TypeError,
-                 "__%.4s__ returned non-%.4s (type %.200s)",
-                 type_name, type_name, Py_TYPE(result)->tp_name);
-    Py_DECREF(result);
-    return NULL;
-}
-static CYTHON_INLINE PyObject* __Pyx_PyNumber_IntOrLong(PyObject* x) {
-#if CYTHON_USE_TYPE_SLOTS
-  PyNumberMethods *m;
-#endif
-  const char *name = NULL;
-  PyObject *res = NULL;
-#if PY_MAJOR_VERSION < 3
-  if (likely(PyInt_Check(x) || PyLong_Check(x)))
-#else
-  if (likely(PyLong_Check(x)))
-#endif
-    return __Pyx_NewRef(x);
-#if CYTHON_USE_TYPE_SLOTS
-  m = Py_TYPE(x)->tp_as_number;
-  #if PY_MAJOR_VERSION < 3
-  if (m && m->nb_int) {
-    name = "int";
-    res = m->nb_int(x);
-  }
-  else if (m && m->nb_long) {
-    name = "long";
-    res = m->nb_long(x);
-  }
-  #else
-  if (likely(m && m->nb_int)) {
-    name = "int";
-    res = m->nb_int(x);
-  }
-  #endif
-#else
-  if (!PyBytes_CheckExact(x) && !PyUnicode_CheckExact(x)) {
-    res = PyNumber_Int(x);
-  }
-#endif
-  if (likely(res)) {
-#if PY_MAJOR_VERSION < 3
-    if (unlikely(!PyInt_Check(res) && !PyLong_Check(res))) {
-#else
-    if (unlikely(!PyLong_CheckExact(res))) {
-#endif
-        return __Pyx_PyNumber_IntOrLongWrongResultType(res, name);
-    }
-  }
-  else if (!PyErr_Occurred()) {
-    PyErr_SetString(PyExc_TypeError,
-                    "an integer is required");
-  }
-  return res;
-}
-static CYTHON_INLINE Py_ssize_t __Pyx_PyIndex_AsSsize_t(PyObject* b) {
-  Py_ssize_t ival;
-  PyObject *x;
-#if PY_MAJOR_VERSION < 3
-  if (likely(PyInt_CheckExact(b))) {
-    if (sizeof(Py_ssize_t) >= sizeof(long))
-        return PyInt_AS_LONG(b);
-    else
-        return PyInt_AsSsize_t(x);
-  }
-#endif
-  if (likely(PyLong_CheckExact(b))) {
-    #if CYTHON_USE_PYLONG_INTERNALS
-    const digit* digits = ((PyLongObject*)b)->ob_digit;
-    const Py_ssize_t size = Py_SIZE(b);
-    if (likely(__Pyx_sst_abs(size) <= 1)) {
-        ival = likely(size) ? digits[0] : 0;
-        if (size == -1) ival = -ival;
-        return ival;
-    } else {
-      switch (size) {
-         case 2:
-           if (8 * sizeof(Py_ssize_t) > 2 * PyLong_SHIFT) {
-             return (Py_ssize_t) (((((size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-         case -2:
-           if (8 * sizeof(Py_ssize_t) > 2 * PyLong_SHIFT) {
-             return -(Py_ssize_t) (((((size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-         case 3:
-           if (8 * sizeof(Py_ssize_t) > 3 * PyLong_SHIFT) {
-             return (Py_ssize_t) (((((((size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-         case -3:
-           if (8 * sizeof(Py_ssize_t) > 3 * PyLong_SHIFT) {
-             return -(Py_ssize_t) (((((((size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-         case 4:
-           if (8 * sizeof(Py_ssize_t) > 4 * PyLong_SHIFT) {
-             return (Py_ssize_t) (((((((((size_t)digits[3]) << PyLong_SHIFT) | (size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-         case -4:
-           if (8 * sizeof(Py_ssize_t) > 4 * PyLong_SHIFT) {
-             return -(Py_ssize_t) (((((((((size_t)digits[3]) << PyLong_SHIFT) | (size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-      }
-    }
-    #endif
-    return PyLong_AsSsize_t(b);
-  }
-  x = PyNumber_Index(b);
-  if (!x) return -1;
-  ival = PyInt_AsSsize_t(x);
-  Py_DECREF(x);
-  return ival;
-}
-static CYTHON_INLINE PyObject * __Pyx_PyBool_FromLong(long b) {
-  return b ? __Pyx_NewRef(Py_True) : __Pyx_NewRef(Py_False);
-}
-static CYTHON_INLINE PyObject * __Pyx_PyInt_FromSize_t(size_t ival) {
-    return PyInt_FromSize_t(ival);
-}
-
-
-#endif /* Py_PYTHON_H */

lakesuperior/store/base_lmdb_store.pxd

@@ -1,4 +1,4 @@
-cimport lakesuperior.cy_include.cylmdb as lmdb
+from lakesuperior.cy_include cimport cylmdb as lmdb
 
 cdef:
     int rc
@@ -13,6 +13,7 @@ cdef:
 cdef class BaseLmdbStore:
     cdef:
         readonly bint is_txn_open
+        readonly bint is_txn_rw
         public bint _open
         unsigned int _readers
         readonly str env_path

lakesuperior/store/base_lmdb_store.pyx

@@ -27,6 +27,12 @@ cdef void _check(int rc, str message='') except *:
         raise KeyNotFoundError()
     if rc == lmdb.MDB_KEYEXIST:
         raise KeyExistsError()
+    if rc == errno.EINVAL:
+        raise InvalidParamError(
+            'Invalid LMDB parameter error.\n'
+            'Please verify that a transaction is open and valid for the '
+            'current operation.'
+        )
     if rc != lmdb.MDB_SUCCESS:
         out_msg = (
                 message + '\nInternal error ({}): '.format(rc)
@@ -44,6 +50,9 @@ class KeyNotFoundError(LmdbError):
 class KeyExistsError(LmdbError):
     pass
 
+class InvalidParamError(LmdbError):
+    pass
+
 
 
 cdef class BaseLmdbStore:
@@ -269,7 +278,7 @@ cdef class BaseLmdbStore:
                     _check(lmdb.mdb_dbi_open(
                             txn, dblabel.encode(), flags, self.dbis + i))
                     dbi = self.dbis[i]
-                    logger.info(f'Created DB {dblabel}: {dbi}')
+                    logger.debug(f'Created DB {dblabel}: {dbi}')
                     # Open and close cursor to initialize the memory slot.
                     _check(lmdb.mdb_cursor_open(
                         txn, dbi, self.curs + dbi))
@@ -335,22 +344,46 @@ cdef class BaseLmdbStore:
         """
         Transaction context manager.
 
+        Open and close a transaction for the duration of the functions in the
+        context. If a transaction has already been opened in the store, a new
+        one is opened only if the current transaction is read-only and the new
+        requested transaction is read-write.
+
+        If a new write transaction is opened, the old one is kept on hold until
+        the new transaction is closed, then restored. All cursors are
+        invalidated and must be restored as well if one needs to reuse them.
+
         :param bool write: Whether a write transaction is to be opened.
 
         :rtype: lmdb.Transaction
         """
+        cdef lmdb.MDB_txn* hold_txn
+
+        will_open = False
+
         if not self.is_open:
             raise LmdbError('Store is not open.')
 
+        # If another transaction is open, only open the new transaction if
+        # the current one is RO and the new one RW.
         if self.is_txn_open:
-            logger.debug(
-                    'Transaction is already active. Not opening another one.')
-            #logger.debug('before yield')
-            yield
-            #logger.debug('after yield')
+            if write:
+                will_open = not self.is_txn_rw
         else:
+            will_open = True
+
+        # If a new transaction needs to be opened and replace the old one,
+        # the old one must be put on hold and swapped out when the new txn
+        # is closed.
+        if will_open:
+            will_reset = self.is_txn_open
+
+        if will_open:
             #logger.debug('Beginning {} transaction.'.format(
             #    'RW' if write else 'RO'))
+            if will_reset:
+                hold_txn = self.txn
+
             try:
                 self._txn_begin(write=write)
                 self.is_txn_rw = write
@@ -359,9 +392,21 @@ cdef class BaseLmdbStore:
                 #logger.debug('In txn_ctx, after yield')
                 self._txn_commit()
                 #logger.debug('after _txn_commit')
+                if will_reset:
+                    lmdb.mdb_txn_reset(hold_txn)
+                    self.txn = hold_txn
+                    _check(lmdb.mdb_txn_renew(self.txn))
+                    self.is_txn_rw = False
             except:
                 self._txn_abort()
                 raise
+        else:
+            logger.info(
+                'Transaction is already active. Not opening another one.'
+            )
+            #logger.debug('before yield')
+            yield
+            #logger.debug('after yield')
 
 
     def begin(self, write=False):

lakesuperior/store/ldp_nr/default_layout.py

@@ -1,11 +1,13 @@
+import hashlib
 import logging
 import os
 import shutil
 
-from hashlib import sha1
 from uuid import uuid4
 
+from lakesuperior import env
 from lakesuperior.store.ldp_nr.base_non_rdf_layout import BaseNonRdfLayout
+from lakesuperior.exceptions import ChecksumValidationError
 
 
 logger = logging.getLogger(__name__)
@@ -16,7 +18,7 @@ class DefaultLayout(BaseNonRdfLayout):
     Default file layout.
 
     This is a simple filesystem layout that stores binaries in pairtree folders
-    in a local filesystem. Parameters can be specified for the 
+    in a local filesystem. Parameters can be specified for the
     """
     @staticmethod
     def local_path(root, uuid, bl=4, bc=4):
@@ -58,7 +60,9 @@ class DefaultLayout(BaseNonRdfLayout):
         os.makedirs(self.root + '/tmp')
 
 
-    def persist(self, stream, bufsize=8192):
+    def persist(
+            self, uid, stream, bufsize=8192, prov_cksum=None,
+            prov_cksum_algo=None):
         r"""
         Store the stream in the file system.
 
@@ -67,46 +71,70 @@ class DefaultLayout(BaseNonRdfLayout):
         to disk and hashed, the temp file is moved to its final location which
         is determined by the hash value.
 
+        :param str uid: UID of the resource.
         :param IOstream stream: file-like object to persist.
         :param int bufsize: Chunk size. 2\*\*12 to 2\*\*15 is a good range.
+        :param str prov_cksum: Checksum provided by the client to verify
+            that the content received matches what has been sent. If None (the
+            default) no verification will take place.
+        :param str prov_cksum_algo: Verification algorithm to validate the
+            integrity of the user-provided data. If this is different from
+            the default hash algorithm set in the application configuration,
+            which is used to calclate the checksum of the file for storing
+            purposes, a separate hash is calculated specifically for validation
+            purposes. Clearly it's more efficient to use the same algorithm and
+            avoid a second checksum calculation.
         """
-        tmp_file = '{}/tmp/{}'.format(self.root, uuid4())
+        # The temp file is created on the destination filesystem to minimize
+        # time and risk of moving it to its final destination.
+        tmp_fname = f'{self.root}/tmp/{uuid4()}'
+
+        default_hash_algo = \
+                env.app_globals.config['application']['uuid']['algo']
+        if prov_cksum_algo is None:
+            prov_cksum_algo = default_hash_algo
         try:
-            with open(tmp_file, 'wb') as f:
-                logger.debug('Writing temp file to {}.'.format(tmp_file))
+            with open(tmp_fname, 'wb') as f:
+                logger.debug(f'Writing temp file to {tmp_fname}.')
 
-                hash = sha1()
+                store_hash = hashlib.new(default_hash_algo)
+                verify_hash = (
+                        store_hash if prov_cksum_algo == default_hash_algo
+                        else hashlib.new(prov_cksum_algo))
                 size = 0
                 while True:
                     buf = stream.read(bufsize)
                     if not buf:
                         break
-                    hash.update(buf)
+                    store_hash.update(buf)
+                    if verify_hash is not store_hash:
+                        verify_hash.update(buf)
                     f.write(buf)
                     size += len(buf)
+
+                if prov_cksum and verify_hash.hexdigest() != prov_cksum:
+                    raise ChecksumValidationError(
+                        uid, prov_cksum, verify_hash.hexdigest())
         except:
-            logger.exception('File write failed on {}.'.format(tmp_file))
-            os.unlink(tmp_file)
+            logger.exception(f'File write failed on {tmp_fname}.')
+            os.unlink(tmp_fname)
             raise
         if size == 0:
             logger.warn('Zero-length file received.')
 
+        # If the file exists already, don't bother rewriting it.
+        dst = __class__.local_path(
+                self.root, store_hash.hexdigest(), self.bl, self.bc)
+        if os.path.exists(dst):
+            logger.info(f'File exists on {dst}. Not overwriting.')
+
         # Move temp file to final destination.
-        uuid = hash.hexdigest()
-        dst = __class__.local_path(self.root, uuid, self.bl, self.bc)
-        logger.debug('Saving file to disk: {}'.format(dst))
+        logger.debug(f'Saving file to disk: {dst}')
         if not os.access(os.path.dirname(dst), os.X_OK):
             os.makedirs(os.path.dirname(dst))
+        os.rename(tmp_fname, dst)
 
-        # If the file exists already, don't bother rewriting it.
-        if os.path.exists(dst):
-            logger.info(
-                    'File exists on {}. Not overwriting.'.format(dst))
-            os.unlink(tmp_file)
-        else:
-            os.rename(tmp_file, dst)
-
-        return uuid, size
+        return store_hash.hexdigest(), size
 
 
     def delete(self, uuid):

lakesuperior/store/ldp_rs/lmdb_store.py

@@ -199,56 +199,3 @@ class LmdbStore(LmdbTriplestore, Store):
 
 
     ## PRIVATE METHODS ##
-
-    def _normalize_context(self, context):
-        """
-        Normalize a context parameter to conform to the model expectations.
-
-        :param context: Context URI or graph.
-        :type context: URIRef or Graph or None
-        """
-        if isinstance(context, Graph):
-            if context == self or isinstance(context.identifier, Variable):
-                context = None
-            else:
-                context = context.identifier
-                #logger.debug('Converted graph into URI: {}'.format(context))
-
-        return context
-
-
-    ## Convenience methods—not necessary for functioning but useful for
-    ## debugging.
-
-    #def _keys_in_ctx(self, pk_ctx):
-    #    """
-    #    Convenience method to list all keys in a context.
-
-    #    :param bytes pk_ctx: Pickled context URI.
-
-    #    :rtype: Iterator(tuple)
-    #    :return: Generator of triples.
-    #    """
-    #    with self.cur('c:spo') as cur:
-    #        if cur.set_key(pk_ctx):
-    #            tkeys = cur.iternext_dup()
-    #            return {self._key_to_triple(tk) for tk in tkeys}
-    #        else:
-    #            return set()
-
-
-    #def _ctx_for_key(self, tkey):
-    #    """
-    #    Convenience method to list all contexts that a key is in.
-
-    #    :param bytes tkey: Triple key.
-
-    #    :rtype: Iterator(rdflib.URIRef)
-    #    :return: Generator of context URIs.
-    #    """
-    #    with self.cur('spo:c') as cur:
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lakesuperior/store/ldp_rs/lmdb_triplestore.c

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-  #define PyIntObject                  PyLongObject
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-  #define PyNumber_Int                 PyNumber_Long
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-#if PY_MAJOR_VERSION >= 3
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-  #define __Pyx_PyMethod_New(func, self, klass) ((self) ? PyMethod_New(func, self) : (Py_INCREF(func), func))
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-  #define __Pyx_PyType_AsAsync(obj) NULL
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-#ifndef __Pyx_PyAsyncMethodsStruct
-    typedef struct {
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-        unaryfunc am_anext;
-    } __Pyx_PyAsyncMethodsStruct;
-#endif
-
-#if defined(WIN32) || defined(MS_WINDOWS)
-  #define _USE_MATH_DEFINES
-#endif
-#include <math.h>
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-#define __PYX_NAN() ((float) NAN)
-#else
-static CYTHON_INLINE float __PYX_NAN() {
-  float value;
-  memset(&value, 0xFF, sizeof(value));
-  return value;
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-#endif
-#if defined(__CYGWIN__) && defined(_LDBL_EQ_DBL)
-#define __Pyx_truncl trunc
-#else
-#define __Pyx_truncl truncl
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-
-
-#define __PYX_ERR(f_index, lineno, Ln_error) \
-{ \
-  __pyx_filename = __pyx_f[f_index]; __pyx_lineno = lineno; __pyx_clineno = __LINE__; goto Ln_error; \
-}
-
-#ifndef __PYX_EXTERN_C
-  #ifdef __cplusplus
-    #define __PYX_EXTERN_C extern "C"
-  #else
-    #define __PYX_EXTERN_C extern
-  #endif
-#endif
-
-#define __PYX_HAVE__lakesuperior__store__ldp_rs__lmdb_triplestore
-#define __PYX_HAVE_API__lakesuperior__store__ldp_rs__lmdb_triplestore
-/* Early includes */
-#include <stdint.h>
-#include <sys/types.h>
-#include "lmdb.h"
-#include <string.h>
-#include <stdlib.h>
-#include <openssl/sha.h>
-#ifdef _OPENMP
-#include <omp.h>
-#endif /* _OPENMP */
-
-#if defined(PYREX_WITHOUT_ASSERTIONS) && !defined(CYTHON_WITHOUT_ASSERTIONS)
-#define CYTHON_WITHOUT_ASSERTIONS
-#endif
-
-typedef struct {PyObject **p; const char *s; const Py_ssize_t n; const char* encoding;
-                const char is_unicode; const char is_str; const char intern; } __Pyx_StringTabEntry;
-
-#define __PYX_DEFAULT_STRING_ENCODING_IS_ASCII 0
-#define __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT 0
-#define __PYX_DEFAULT_STRING_ENCODING ""
-#define __Pyx_PyObject_FromString __Pyx_PyBytes_FromString
-#define __Pyx_PyObject_FromStringAndSize __Pyx_PyBytes_FromStringAndSize
-#define __Pyx_uchar_cast(c) ((unsigned char)c)
-#define __Pyx_long_cast(x) ((long)x)
-#define __Pyx_fits_Py_ssize_t(v, type, is_signed)  (\
-    (sizeof(type) < sizeof(Py_ssize_t))  ||\
-    (sizeof(type) > sizeof(Py_ssize_t) &&\
-          likely(v < (type)PY_SSIZE_T_MAX ||\
-                 v == (type)PY_SSIZE_T_MAX)  &&\
-          (!is_signed || likely(v > (type)PY_SSIZE_T_MIN ||\
-                                v == (type)PY_SSIZE_T_MIN)))  ||\
-    (sizeof(type) == sizeof(Py_ssize_t) &&\
-          (is_signed || likely(v < (type)PY_SSIZE_T_MAX ||\
-                               v == (type)PY_SSIZE_T_MAX)))  )
-#if defined (__cplusplus) && __cplusplus >= 201103L
-    #include <cstdlib>
-    #define __Pyx_sst_abs(value) std::abs(value)
-#elif SIZEOF_INT >= SIZEOF_SIZE_T
-    #define __Pyx_sst_abs(value) abs(value)
-#elif SIZEOF_LONG >= SIZEOF_SIZE_T
-    #define __Pyx_sst_abs(value) labs(value)
-#elif defined (_MSC_VER)
-    #define __Pyx_sst_abs(value) ((Py_ssize_t)_abs64(value))
-#elif defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
-    #define __Pyx_sst_abs(value) llabs(value)
-#elif defined (__GNUC__)
-    #define __Pyx_sst_abs(value) __builtin_llabs(value)
-#else
-    #define __Pyx_sst_abs(value) ((value<0) ? -value : value)
-#endif
-static CYTHON_INLINE const char* __Pyx_PyObject_AsString(PyObject*);
-static CYTHON_INLINE const char* __Pyx_PyObject_AsStringAndSize(PyObject*, Py_ssize_t* length);
-#define __Pyx_PyByteArray_FromString(s) PyByteArray_FromStringAndSize((const char*)s, strlen((const char*)s))
-#define __Pyx_PyByteArray_FromStringAndSize(s, l) PyByteArray_FromStringAndSize((const char*)s, l)
-#define __Pyx_PyBytes_FromString        PyBytes_FromString
-#define __Pyx_PyBytes_FromStringAndSize PyBytes_FromStringAndSize
-static CYTHON_INLINE PyObject* __Pyx_PyUnicode_FromString(const char*);
-#if PY_MAJOR_VERSION < 3
-    #define __Pyx_PyStr_FromString        __Pyx_PyBytes_FromString
-    #define __Pyx_PyStr_FromStringAndSize __Pyx_PyBytes_FromStringAndSize
-#else
-    #define __Pyx_PyStr_FromString        __Pyx_PyUnicode_FromString
-    #define __Pyx_PyStr_FromStringAndSize __Pyx_PyUnicode_FromStringAndSize
-#endif
-#define __Pyx_PyBytes_AsWritableString(s)     ((char*) PyBytes_AS_STRING(s))
-#define __Pyx_PyBytes_AsWritableSString(s)    ((signed char*) PyBytes_AS_STRING(s))
-#define __Pyx_PyBytes_AsWritableUString(s)    ((unsigned char*) PyBytes_AS_STRING(s))
-#define __Pyx_PyBytes_AsString(s)     ((const char*) PyBytes_AS_STRING(s))
-#define __Pyx_PyBytes_AsSString(s)    ((const signed char*) PyBytes_AS_STRING(s))
-#define __Pyx_PyBytes_AsUString(s)    ((const unsigned char*) PyBytes_AS_STRING(s))
-#define __Pyx_PyObject_AsWritableString(s)    ((char*) __Pyx_PyObject_AsString(s))
-#define __Pyx_PyObject_AsWritableSString(s)    ((signed char*) __Pyx_PyObject_AsString(s))
-#define __Pyx_PyObject_AsWritableUString(s)    ((unsigned char*) __Pyx_PyObject_AsString(s))
-#define __Pyx_PyObject_AsSString(s)    ((const signed char*) __Pyx_PyObject_AsString(s))
-#define __Pyx_PyObject_AsUString(s)    ((const unsigned char*) __Pyx_PyObject_AsString(s))
-#define __Pyx_PyObject_FromCString(s)  __Pyx_PyObject_FromString((const char*)s)
-#define __Pyx_PyBytes_FromCString(s)   __Pyx_PyBytes_FromString((const char*)s)
-#define __Pyx_PyByteArray_FromCString(s)   __Pyx_PyByteArray_FromString((const char*)s)
-#define __Pyx_PyStr_FromCString(s)     __Pyx_PyStr_FromString((const char*)s)
-#define __Pyx_PyUnicode_FromCString(s) __Pyx_PyUnicode_FromString((const char*)s)
-static CYTHON_INLINE size_t __Pyx_Py_UNICODE_strlen(const Py_UNICODE *u) {
-    const Py_UNICODE *u_end = u;
-    while (*u_end++) ;
-    return (size_t)(u_end - u - 1);
-}
-#define __Pyx_PyUnicode_FromUnicode(u)       PyUnicode_FromUnicode(u, __Pyx_Py_UNICODE_strlen(u))
-#define __Pyx_PyUnicode_FromUnicodeAndLength PyUnicode_FromUnicode
-#define __Pyx_PyUnicode_AsUnicode            PyUnicode_AsUnicode
-#define __Pyx_NewRef(obj) (Py_INCREF(obj), obj)
-#define __Pyx_Owned_Py_None(b) __Pyx_NewRef(Py_None)
-static CYTHON_INLINE PyObject * __Pyx_PyBool_FromLong(long b);
-static CYTHON_INLINE int __Pyx_PyObject_IsTrue(PyObject*);
-static CYTHON_INLINE PyObject* __Pyx_PyNumber_IntOrLong(PyObject* x);
-#define __Pyx_PySequence_Tuple(obj)\
-    (likely(PyTuple_CheckExact(obj)) ? __Pyx_NewRef(obj) : PySequence_Tuple(obj))
-static CYTHON_INLINE Py_ssize_t __Pyx_PyIndex_AsSsize_t(PyObject*);
-static CYTHON_INLINE PyObject * __Pyx_PyInt_FromSize_t(size_t);
-#if CYTHON_ASSUME_SAFE_MACROS
-#define __pyx_PyFloat_AsDouble(x) (PyFloat_CheckExact(x) ? PyFloat_AS_DOUBLE(x) : PyFloat_AsDouble(x))
-#else
-#define __pyx_PyFloat_AsDouble(x) PyFloat_AsDouble(x)
-#endif
-#define __pyx_PyFloat_AsFloat(x) ((float) __pyx_PyFloat_AsDouble(x))
-#if PY_MAJOR_VERSION >= 3
-#define __Pyx_PyNumber_Int(x) (PyLong_CheckExact(x) ? __Pyx_NewRef(x) : PyNumber_Long(x))
-#else
-#define __Pyx_PyNumber_Int(x) (PyInt_CheckExact(x) ? __Pyx_NewRef(x) : PyNumber_Int(x))
-#endif
-#define __Pyx_PyNumber_Float(x) (PyFloat_CheckExact(x) ? __Pyx_NewRef(x) : PyNumber_Float(x))
-#if PY_MAJOR_VERSION < 3 && __PYX_DEFAULT_STRING_ENCODING_IS_ASCII
-static int __Pyx_sys_getdefaultencoding_not_ascii;
-static int __Pyx_init_sys_getdefaultencoding_params(void) {
-    PyObject* sys;
-    PyObject* default_encoding = NULL;
-    PyObject* ascii_chars_u = NULL;
-    PyObject* ascii_chars_b = NULL;
-    const char* default_encoding_c;
-    sys = PyImport_ImportModule("sys");
-    if (!sys) goto bad;
-    default_encoding = PyObject_CallMethod(sys, (char*) "getdefaultencoding", NULL);
-    Py_DECREF(sys);
-    if (!default_encoding) goto bad;
-    default_encoding_c = PyBytes_AsString(default_encoding);
-    if (!default_encoding_c) goto bad;
-    if (strcmp(default_encoding_c, "ascii") == 0) {
-        __Pyx_sys_getdefaultencoding_not_ascii = 0;
-    } else {
-        char ascii_chars[128];
-        int c;
-        for (c = 0; c < 128; c++) {
-            ascii_chars[c] = c;
-        }
-        __Pyx_sys_getdefaultencoding_not_ascii = 1;
-        ascii_chars_u = PyUnicode_DecodeASCII(ascii_chars, 128, NULL);
-        if (!ascii_chars_u) goto bad;
-        ascii_chars_b = PyUnicode_AsEncodedString(ascii_chars_u, default_encoding_c, NULL);
-        if (!ascii_chars_b || !PyBytes_Check(ascii_chars_b) || memcmp(ascii_chars, PyBytes_AS_STRING(ascii_chars_b), 128) != 0) {
-            PyErr_Format(
-                PyExc_ValueError,
-                "This module compiled with c_string_encoding=ascii, but default encoding '%.200s' is not a superset of ascii.",
-                default_encoding_c);
-            goto bad;
-        }
-        Py_DECREF(ascii_chars_u);
-        Py_DECREF(ascii_chars_b);
-    }
-    Py_DECREF(default_encoding);
-    return 0;
-bad:
-    Py_XDECREF(default_encoding);
-    Py_XDECREF(ascii_chars_u);
-    Py_XDECREF(ascii_chars_b);
-    return -1;
-}
-#endif
-#if __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT && PY_MAJOR_VERSION >= 3
-#define __Pyx_PyUnicode_FromStringAndSize(c_str, size) PyUnicode_DecodeUTF8(c_str, size, NULL)
-#else
-#define __Pyx_PyUnicode_FromStringAndSize(c_str, size) PyUnicode_Decode(c_str, size, __PYX_DEFAULT_STRING_ENCODING, NULL)
-#if __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT
-static char* __PYX_DEFAULT_STRING_ENCODING;
-static int __Pyx_init_sys_getdefaultencoding_params(void) {
-    PyObject* sys;
-    PyObject* default_encoding = NULL;
-    char* default_encoding_c;
-    sys = PyImport_ImportModule("sys");
-    if (!sys) goto bad;
-    default_encoding = PyObject_CallMethod(sys, (char*) (const char*) "getdefaultencoding", NULL);
-    Py_DECREF(sys);
-    if (!default_encoding) goto bad;
-    default_encoding_c = PyBytes_AsString(default_encoding);
-    if (!default_encoding_c) goto bad;
-    __PYX_DEFAULT_STRING_ENCODING = (char*) malloc(strlen(default_encoding_c));
-    if (!__PYX_DEFAULT_STRING_ENCODING) goto bad;
-    strcpy(__PYX_DEFAULT_STRING_ENCODING, default_encoding_c);
-    Py_DECREF(default_encoding);
-    return 0;
-bad:
-    Py_XDECREF(default_encoding);
-    return -1;
-}
-#endif
-#endif
-
-
-/* Test for GCC > 2.95 */
-#if defined(__GNUC__)     && (__GNUC__ > 2 || (__GNUC__ == 2 && (__GNUC_MINOR__ > 95)))
-  #define likely(x)   __builtin_expect(!!(x), 1)
-  #define unlikely(x) __builtin_expect(!!(x), 0)
-#else /* !__GNUC__ or GCC < 2.95 */
-  #define likely(x)   (x)
-  #define unlikely(x) (x)
-#endif /* __GNUC__ */
-static CYTHON_INLINE void __Pyx_pretend_to_initialize(void* ptr) { (void)ptr; }
-
-static PyObject *__pyx_m = NULL;
-static PyObject *__pyx_d;
-static PyObject *__pyx_b;
-static PyObject *__pyx_cython_runtime = NULL;
-static PyObject *__pyx_empty_tuple;
-static PyObject *__pyx_empty_bytes;
-static PyObject *__pyx_empty_unicode;
-static int __pyx_lineno;
-static int __pyx_clineno = 0;
-static const char * __pyx_cfilenm= __FILE__;
-static const char *__pyx_filename;
-
-
-static const char *__pyx_f[] = {
-  "lakesuperior/store/ldp_rs/lmdb_triplestore.pyx",
-  "stringsource",
-};
-/* NoFastGil.proto */
-#define __Pyx_PyGILState_Ensure PyGILState_Ensure
-#define __Pyx_PyGILState_Release PyGILState_Release
-#define __Pyx_FastGIL_Remember()
-#define __Pyx_FastGIL_Forget()
-#define __Pyx_FastGilFuncInit()
-
-
-/*--- Type declarations ---*/
-struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore;
-struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet;
-struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph;
-struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr;
-struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore;
-struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple;
-struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr;
-struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_2_contexts;
-struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_3_triples;
-struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_4_all_terms;
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store__check;
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__init_dbis;
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__txn_begin;
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__key_exists;
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__cur_open;
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_get_dbi;
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__put;
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__get_data;
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__delete;
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_close_env;
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_destroy;
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_get_data;
-
-/* "lakesuperior/store/base_lmdb_store.pxd":10
- *     lmdb.MDB_dbi dbi
- * 
- *     void _check(int rc, str message=*) except *             # <<<<<<<<<<<<<<
- * 
- * 
- */
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store__check {
-  int __pyx_n;
-  PyObject *message;
-};
-
-/* "lakesuperior/store/base_lmdb_store.pxd":26
- *         void _clear_stale_readers(self) except *
- *         void _cur_close(self, lmdb.MDB_cursor *cur) except *
- *         void _init_dbis(self, create=*) except *             # <<<<<<<<<<<<<<
- *         void _txn_begin(self, write=*, lmdb.MDB_txn *parent=*) except *
- *         void _txn_commit(self) except *
- */
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__init_dbis {
-  int __pyx_n;
-  PyObject *create;
-};
-
-/* "lakesuperior/store/base_lmdb_store.pxd":27
- *         void _cur_close(self, lmdb.MDB_cursor *cur) except *
- *         void _init_dbis(self, create=*) except *
- *         void _txn_begin(self, write=*, lmdb.MDB_txn *parent=*) except *             # <<<<<<<<<<<<<<
- *         void _txn_commit(self) except *
- *         void _txn_abort(self) except *
- */
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__txn_begin {
-  int __pyx_n;
-  PyObject *write;
-  MDB_txn *parent;
-};
-
-/* "lakesuperior/store/base_lmdb_store.pxd":30
- *         void _txn_commit(self) except *
- *         void _txn_abort(self) except *
- *         inline bint _key_exists(             # <<<<<<<<<<<<<<
- *             self, unsigned char *key, unsigned char klen,
- *             unsigned char *dblabel=*) except -1
- */
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__key_exists {
-  int __pyx_n;
-  unsigned char *dblabel;
-};
-
-/* "lakesuperior/store/base_lmdb_store.pxd":35
- * 
- *         size_t _txn_id(self) except -1
- *         lmdb.MDB_cursor *_cur_open(             # <<<<<<<<<<<<<<
- *                 self, unsigned char *dblabel=*, lmdb.MDB_txn *txn=*) except *
- * 
- */
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__cur_open {
-  int __pyx_n;
-  unsigned char *dblabel;
-  MDB_txn *txn;
-};
-
-/* "lakesuperior/store/base_lmdb_store.pxd":38
- *                 self, unsigned char *dblabel=*, lmdb.MDB_txn *txn=*) except *
- * 
- *         lmdb.MDB_dbi get_dbi(             # <<<<<<<<<<<<<<
- *                 self, unsigned char *dblabel=*, lmdb.MDB_txn *txn=*)
- * 
- */
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_get_dbi {
-  int __pyx_n;
-  unsigned char *dblabel;
-  MDB_txn *txn;
-};
-
-/* "lakesuperior/store/base_lmdb_store.pxd":41
- *                 self, unsigned char *dblabel=*, lmdb.MDB_txn *txn=*)
- * 
- *         void _put(             # <<<<<<<<<<<<<<
- *                 self, unsigned char *key, size_t key_size, unsigned char *data,
- *                 size_t data_size, unsigned char *dblabel=*,
- */
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__put {
-  int __pyx_n;
-  unsigned char *dblabel;
-  MDB_txn *txn;
-  unsigned int flags;
-};
-
-/* "lakesuperior/store/base_lmdb_store.pxd":46
- *                 lmdb.MDB_txn *txn=*, unsigned int flags=*) except *
- * 
- *         void _get_data(             # <<<<<<<<<<<<<<
- *                 self, unsigned char *key, size_t klen, lmdb.MDB_val *rv,
- *                 unsigned char *dblabel=*) except *
- */
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__get_data {
-  int __pyx_n;
-  unsigned char *dblabel;
-};
-
-/* "lakesuperior/store/base_lmdb_store.pxd":50
- *                 unsigned char *dblabel=*) except *
- * 
- *         void _delete(             # <<<<<<<<<<<<<<
- *                 self, unsigned char *key, size_t klen,
- *                 unsigned char *dblabel=*) except *
- */
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__delete {
-  int __pyx_n;
-  unsigned char *dblabel;
-};
-
-/* "lakesuperior/store/base_lmdb_store.pxd":57
- *         #int _reader_list_callback(self, const unsigned char *msg, void *str_)
- * 
- *     cpdef void close_env(self, bint commit_pending_transaction=*) except *             # <<<<<<<<<<<<<<
- *     cpdef void destroy(self, _path=*) except *
- *     #cpdef get_dup_data(self, unsigned char *key, db=*)
- */
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_close_env {
-  int __pyx_n;
-  int commit_pending_transaction;
-};
-
-/* "lakesuperior/store/base_lmdb_store.pxd":58
- * 
- *     cpdef void close_env(self, bint commit_pending_transaction=*) except *
- *     cpdef void destroy(self, _path=*) except *             # <<<<<<<<<<<<<<
- *     #cpdef get_dup_data(self, unsigned char *key, db=*)
- *     #cpdef get_all_pairs(self, db=*)
- */
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_destroy {
-  int __pyx_n;
-  PyObject *_path;
-};
-
-/* "lakesuperior/store/base_lmdb_store.pxd":61
- *     #cpdef get_dup_data(self, unsigned char *key, db=*)
- *     #cpdef get_all_pairs(self, db=*)
- *     cpdef bytes get_data(self, key, dblabel=*)             # <<<<<<<<<<<<<<
- *     cpdef dict stats(self)
- *     cpdef int txn_id(self)
- */
-struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_get_data {
-  int __pyx_n;
-  PyObject *dblabel;
-};
-struct __pyx_t_12lakesuperior_5store_6ldp_rs_4term_IdentifierTerm;
-struct __pyx_t_12lakesuperior_5store_6ldp_rs_4term_LiteralTerm;
-
-/* "lakesuperior/store/ldp_rs/term.pxd":10
- *     #size_t pack_size
- * 
- *     struct IdentifierTerm:             # <<<<<<<<<<<<<<
- *         char type
- *         unsigned char *data
- */
-struct __pyx_t_12lakesuperior_5store_6ldp_rs_4term_IdentifierTerm {
-  char type;
-  unsigned char *data;
-};
-
-/* "lakesuperior/store/ldp_rs/term.pxd":14
- *         unsigned char *data
- * 
- *     struct LiteralTerm:             # <<<<<<<<<<<<<<
- *         char type
- *         unsigned char *data
- */
-struct __pyx_t_12lakesuperior_5store_6ldp_rs_4term_LiteralTerm {
-  char type;
-  unsigned char *data;
-  unsigned char *datatype;
-  unsigned char *lang;
-};
-struct __pyx_opt_args_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore__len;
-struct __pyx_opt_args_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_add;
-struct __pyx_opt_args_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore__remove;
-struct __pyx_opt_args_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_triple_keys;
-struct __pyx_opt_args_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_all_contexts;
-struct __pyx_opt_args_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore__append;
-
-/* "lakesuperior/store/ldp_rs/lmdb_triplestore.pyx":77
- * 
- * 
- * ctypedef unsigned char Key[KLEN]             # <<<<<<<<<<<<<<
- * ctypedef unsigned char DoubleKey[DBL_KLEN]
- * ctypedef unsigned char TripleKey[TRP_KLEN]
- */
-typedef unsigned char __pyx_t_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Key[5];
-
-/* "lakesuperior/store/ldp_rs/lmdb_triplestore.pyx":78
- * 
- * ctypedef unsigned char Key[KLEN]
- * ctypedef unsigned char DoubleKey[DBL_KLEN]             # <<<<<<<<<<<<<<
- * ctypedef unsigned char TripleKey[TRP_KLEN]
- * ctypedef unsigned char QuadKey[QUAD_KLEN]
- */
-typedef unsigned char __pyx_t_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_DoubleKey[10];
-
-/* "lakesuperior/store/ldp_rs/lmdb_triplestore.pyx":79
- * ctypedef unsigned char Key[KLEN]
- * ctypedef unsigned char DoubleKey[DBL_KLEN]
- * ctypedef unsigned char TripleKey[TRP_KLEN]             # <<<<<<<<<<<<<<
- * ctypedef unsigned char QuadKey[QUAD_KLEN]
- * ctypedef unsigned char Hash[HLEN]
- */
-typedef unsigned char __pyx_t_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_TripleKey[15];
-
-/* "lakesuperior/store/ldp_rs/lmdb_triplestore.pyx":80
- * ctypedef unsigned char DoubleKey[DBL_KLEN]
- * ctypedef unsigned char TripleKey[TRP_KLEN]
- * ctypedef unsigned char QuadKey[QUAD_KLEN]             # <<<<<<<<<<<<<<
- * ctypedef unsigned char Hash[HLEN]
- * 
- */
-typedef unsigned char __pyx_t_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_QuadKey[20];
-
-/* "lakesuperior/store/ldp_rs/lmdb_triplestore.pyx":81
- * ctypedef unsigned char TripleKey[TRP_KLEN]
- * ctypedef unsigned char QuadKey[QUAD_KLEN]
- * ctypedef unsigned char Hash[HLEN]             # <<<<<<<<<<<<<<
- * 
- * 
- */
-typedef unsigned char __pyx_t_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Hash[20];
-
-/* "lakesuperior/store/ldp_rs/lmdb_triplestore.pyx":759
- * 
- * 
- *     cpdef size_t _len(self, context=None) except -1:             # <<<<<<<<<<<<<<
- *         """
- *         Return the length of the dataset.
- */
-struct __pyx_opt_args_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore__len {
-  int __pyx_n;
-  PyObject *context;
-};
-
-/* "lakesuperior/store/ldp_rs/lmdb_triplestore.pyx":794
- *     # Triple and graph methods.
- * 
- *     cpdef add(self, triple, context=None, quoted=False):             # <<<<<<<<<<<<<<
- *         """
- *         Add a triple and start indexing.
- */
-struct __pyx_opt_args_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_add {
-  int __pyx_n;
-  PyObject *context;
-  PyObject *quoted;
-};
-
-/* "lakesuperior/store/ldp_rs/lmdb_triplestore.pyx":973
- * 
- * 
- *     cpdef void _remove(self, tuple triple_pattern, context=None) except *:             # <<<<<<<<<<<<<<
- *         cdef:
- *             unsigned char spok[TRP_KLEN]
- */
-struct __pyx_opt_args_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore__remove {
-  int __pyx_n;
-  PyObject *context;
-};
-
-/* "lakesuperior/store/ldp_rs/lmdb_triplestore.pyx":1327
- * 
- * 
- *     cpdef ResultSet triple_keys(self, tuple triple_pattern, context=None):             # <<<<<<<<<<<<<<
- *         """
- *         Top-level lookup method.
- */
-struct __pyx_opt_args_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_triple_keys {
-  int __pyx_n;
-  PyObject *context;
-};
-
-/* "lakesuperior/store/ldp_rs/lmdb_triplestore.pyx":1882
- * 
- * 
- *     cpdef tuple all_contexts(self, triple=None):             # <<<<<<<<<<<<<<
- *         """
- *         Get a list of all contexts.
- */
-struct __pyx_opt_args_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_all_contexts {
-  int __pyx_n;
-  PyObject *triple;
-};
-
-/* "lakesuperior/store/ldp_rs/lmdb_triplestore.pyx":2037
- * 
- * 
- *     cdef void _append(             # <<<<<<<<<<<<<<
- *             self, unsigned char *value, size_t vlen, Key *nkey,
- *             unsigned char *dblabel=b'', lmdb.MDB_txn *txn=NULL,
- */
-struct __pyx_opt_args_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore__append {
-  int __pyx_n;
-  unsigned char *dblabel;
-  MDB_txn *txn;
-  unsigned int flags;
-};
-
-/* "lakesuperior/store/base_lmdb_store.pxd":13
- * 
- * 
- * cdef class BaseLmdbStore:             # <<<<<<<<<<<<<<
- *     cdef:
- *         readonly bint is_txn_open
- */
-struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore {
-  PyObject_HEAD
-  struct __pyx_vtabstruct_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_vtab;
-  int is_txn_open;
-  int _open;
-  unsigned int _readers;
-  PyObject *env_path;
-  MDB_dbi *dbis;
-  MDB_env *dbenv;
-  MDB_txn *txn;
-  MDB_cursor **curs;
-};
-
-
-/* "lakesuperior/store/ldp_rs/lmdb_triplestore.pyx":127
- * 
- * 
- * cdef class ResultSet:             # <<<<<<<<<<<<<<
- *     """
- *     Pre-allocated result set.
- */
-struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet {
-  PyObject_HEAD
-  struct __pyx_vtabstruct_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *__pyx_vtab;
-  unsigned char *data;
-  unsigned char itemsize;
-  size_t ct;
-  size_t size;
-};
-
-
-/* "lakesuperior/store/ldp_rs/lmdb_triplestore.pyx":264
- * 
- * 
- * cdef class SimpleGraph:             # <<<<<<<<<<<<<<
- *     """
- *     Fast and simple implementation of a graph.
- */
-struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph {
-  PyObject_HEAD
-  struct __pyx_vtabstruct_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_vtab;
-  PyObject *data;
-};
-
-
-/* "lakesuperior/store/ldp_rs/lmdb_triplestore.pyx":533
- * 
- * 
- * cdef class Imr(SimpleGraph):             # <<<<<<<<<<<<<<
- *     """
- *     In-memory resource data container.
- */
-struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr {
-  struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph __pyx_base;
-  PyObject *uri;
-};
-
-
-/* "lakesuperior/store/ldp_rs/lmdb_triplestore.pyx":683
- * 
- * 
- * cdef class LmdbTriplestore(BaseLmdbStore):             # <<<<<<<<<<<<<<
- *     """
- *     Low-level storage layer.
- */
-struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore {
-  struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore __pyx_base;
-};
-
-
-/* "lakesuperior/store/ldp_rs/lmdb_triplestore.pyx":219
- *     # Access methods.
- * 
- *     def to_tuple(self):             # <<<<<<<<<<<<<<
- *         """
- *         Return the data set as a Python tuple.
- */
-struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple {
-  PyObject_HEAD
-  struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *__pyx_v_self;
-};
-
-
-/* "lakesuperior/store/ldp_rs/lmdb_triplestore.pyx":226
- *         """
- *         return tuple(
- *                 self.data[i: i + self.itemsize]             # <<<<<<<<<<<<<<
- *                 for i in range(0, self.size, self.itemsize))
- * 
- */
-struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr {
-  PyObject_HEAD
-  struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple *__pyx_outer_scope;
-  PyObject *__pyx_v_i;
-  PyObject *__pyx_t_0;
-  Py_ssize_t __pyx_t_1;
-  PyObject *(*__pyx_t_2)(PyObject *);
-};
-
-
-/* "lakesuperior/store/ldp_rs/lmdb_triplestore.pyx":1255
- * 
- *     # TODO Deprecate RDFLib API?
- *     def contexts(self, triple=None):             # <<<<<<<<<<<<<<
- *         """
- *         Get a list of all contexts.
- */
-struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_2_contexts {
-  PyObject_HEAD
-  PyObject *__pyx_v_ctx_uri;
-  struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self;
-  PyObject *__pyx_v_triple;
-  PyObject *__pyx_t_0;
-  Py_ssize_t __pyx_t_1;
-};
-
-
-/* "lakesuperior/store/ldp_rs/lmdb_triplestore.pyx":1265
- * 
- * 
- *     def triples(self, triple_pattern, context=None):             # <<<<<<<<<<<<<<
- *         """
- *         Generator over matching triples.
- */
-struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_3_triples {
-  PyObject_HEAD
-  PyObject *__pyx_v_c_uri;
-  unsigned char __pyx_v_ck[5];
-  PyObject *__pyx_v_context;
-  PyObject *__pyx_v_contexts;
-  MDB_cursor *__pyx_v_cur;
-  struct MDB_val __pyx_v_data_v;
-  size_t __pyx_v_i;
-  size_t __pyx_v_j;
-  struct MDB_val __pyx_v_key_v;
-  struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *__pyx_v_rset;
-  struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self;
-  unsigned char __pyx_v_spok[15];
-  PyObject *__pyx_v_triple_pattern;
-  size_t __pyx_t_0;
-  size_t __pyx_t_1;
-  size_t __pyx_t_2;
-};
-
-
-/* "lakesuperior/store/ldp_rs/lmdb_triplestore.pyx":1839
- * 
- * 
- *     def all_terms(self, term_type):             # <<<<<<<<<<<<<<
- *         """
- *         Return all terms of a type (``s``, ``p``, or ``o``) in the store.
- */
-struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_4_all_terms {
-  PyObject_HEAD
-  PyObject *__pyx_v_key;
-  struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self;
-  PyObject *__pyx_v_term_type;
-  PyObject *__pyx_t_0;
-  Py_ssize_t __pyx_t_1;
-  PyObject *(*__pyx_t_2)(PyObject *);
-};
-
-
-
-/* "lakesuperior/store/base_lmdb_store.pxd":13
- * 
- * 
- * cdef class BaseLmdbStore:             # <<<<<<<<<<<<<<
- *     cdef:
- *         readonly bint is_txn_open
- */
-
-struct __pyx_vtabstruct_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore {
-  void (*_clear_stale_readers)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *);
-  void (*_cur_close)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *, MDB_cursor *);
-  void (*_init_dbis)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__init_dbis *__pyx_optional_args);
-  void (*_txn_begin)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__txn_begin *__pyx_optional_args);
-  void (*_txn_commit)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *);
-  void (*_txn_abort)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *);
-  int (*_key_exists)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *, unsigned char *, unsigned char, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__key_exists *__pyx_optional_args);
-  size_t (*_txn_id)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *);
-  MDB_cursor *(*_cur_open)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__cur_open *__pyx_optional_args);
-  MDB_dbi (*get_dbi)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_get_dbi *__pyx_optional_args);
-  void (*_put)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *, unsigned char *, size_t, unsigned char *, size_t, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__put *__pyx_optional_args);
-  void (*_get_data)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *, unsigned char *, size_t, struct MDB_val *, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__get_data *__pyx_optional_args);
-  void (*_delete)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *, unsigned char *, size_t, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore__delete *__pyx_optional_args);
-  PyObject *(*_stats)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *);
-  void (*close_env)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *, int __pyx_skip_dispatch, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_close_env *__pyx_optional_args);
-  void (*destroy)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *, int __pyx_skip_dispatch, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_destroy *__pyx_optional_args);
-  PyObject *(*get_data)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *, PyObject *, int __pyx_skip_dispatch, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store_13BaseLmdbStore_get_data *__pyx_optional_args);
-  PyObject *(*stats)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *, int __pyx_skip_dispatch);
-  int (*txn_id)(struct __pyx_obj_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *, int __pyx_skip_dispatch);
-};
-static struct __pyx_vtabstruct_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore *__pyx_vtabptr_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore;
-
-
-/* "lakesuperior/store/ldp_rs/lmdb_triplestore.pyx":127
- * 
- * 
- * cdef class ResultSet:             # <<<<<<<<<<<<<<
- *     """
- *     Pre-allocated result set.
- */
-
-struct __pyx_vtabstruct_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet {
-  void (*resize)(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *, size_t);
-  unsigned char *(*get_item)(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *, PyObject *);
-};
-static struct __pyx_vtabstruct_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *__pyx_vtabptr_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet;
-
-
-/* "lakesuperior/store/ldp_rs/lmdb_triplestore.pyx":264
- * 
- * 
- * cdef class SimpleGraph:             # <<<<<<<<<<<<<<
- *     """
- *     Fast and simple implementation of a graph.
- */
-
-struct __pyx_vtabstruct_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph {
-  void (*_data_from_lookup)(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *, PyObject *, struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *);
-  void (*set)(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *, PyObject *, int __pyx_skip_dispatch);
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-              PyThreadState *tstate;\
-              PyGILState_STATE state = PyGILState_Ensure();\
-              tstate = __Pyx_PyThreadState_Current;\
-              if (unlikely(tstate->use_tracing && tstate->c_tracefunc && __pyx_frame->f_trace)) {\
-                  ret = __Pyx_call_line_trace_func(tstate, __pyx_frame, lineno);\
-              }\
-              PyGILState_Release(state);\
-              if (unlikely(ret)) goto_error;\
-          }\
-      } else {\
-          PyThreadState* tstate = __Pyx_PyThreadState_Current;\
-          if (unlikely(tstate->use_tracing && tstate->c_tracefunc && __pyx_frame->f_trace)) {\
-              int ret = __Pyx_call_line_trace_func(tstate, __pyx_frame, lineno);\
-              if (unlikely(ret)) goto_error;\
-          }\
-      }\
-  }
-  #else
-  #define __Pyx_TraceLine(lineno, nogil, goto_error)\
-  if (likely(!__Pyx_use_tracing)); else {\
-      PyThreadState* tstate = __Pyx_PyThreadState_Current;\
-      if (unlikely(tstate->use_tracing && tstate->c_tracefunc && __pyx_frame->f_trace)) {\
-          int ret = __Pyx_call_line_trace_func(tstate, __pyx_frame, lineno);\
-          if (unlikely(ret)) goto_error;\
-      }\
-  }
-  #endif
-#else
-  #define __Pyx_TraceLine(lineno, nogil, goto_error)   if ((1)); else goto_error;
-#endif
-
-/* WriteUnraisableException.proto */
-static void __Pyx_WriteUnraisable(const char *name, int clineno,
-                                  int lineno, const char *filename,
-                                  int full_traceback, int nogil);
-
-/* RaiseArgTupleInvalid.proto */
-static void __Pyx_RaiseArgtupleInvalid(const char* func_name, int exact,
-    Py_ssize_t num_min, Py_ssize_t num_max, Py_ssize_t num_found);
-
-/* RaiseDoubleKeywords.proto */
-static void __Pyx_RaiseDoubleKeywordsError(const char* func_name, PyObject* kw_name);
-
-/* ParseKeywords.proto */
-static int __Pyx_ParseOptionalKeywords(PyObject *kwds, PyObject **argnames[],\
-    PyObject *kwds2, PyObject *values[], Py_ssize_t num_pos_args,\
-    const char* function_name);
-
-/* None.proto */
-static CYTHON_INLINE void __Pyx_RaiseClosureNameError(const char *varname);
-
-/* PyObjectCall.proto */
-#if CYTHON_COMPILING_IN_CPYTHON
-static CYTHON_INLINE PyObject* __Pyx_PyObject_Call(PyObject *func, PyObject *arg, PyObject *kw);
-#else
-#define __Pyx_PyObject_Call(func, arg, kw) PyObject_Call(func, arg, kw)
-#endif
-
-/* RaiseException.proto */
-static void __Pyx_Raise(PyObject *type, PyObject *value, PyObject *tb, PyObject *cause);
-
-/* GetModuleGlobalName.proto */
-static CYTHON_INLINE PyObject *__Pyx_GetModuleGlobalName(PyObject *name);
-
-/* PyCFunctionFastCall.proto */
-#if CYTHON_FAST_PYCCALL
-static CYTHON_INLINE PyObject *__Pyx_PyCFunction_FastCall(PyObject *func, PyObject **args, Py_ssize_t nargs);
-#else
-#define __Pyx_PyCFunction_FastCall(func, args, nargs)  (assert(0), NULL)
-#endif
-
-/* PyFunctionFastCall.proto */
-#if CYTHON_FAST_PYCALL
-#define __Pyx_PyFunction_FastCall(func, args, nargs)\
-    __Pyx_PyFunction_FastCallDict((func), (args), (nargs), NULL)
-#if 1 || PY_VERSION_HEX < 0x030600B1
-static PyObject *__Pyx_PyFunction_FastCallDict(PyObject *func, PyObject **args, int nargs, PyObject *kwargs);
-#else
-#define __Pyx_PyFunction_FastCallDict(func, args, nargs, kwargs) _PyFunction_FastCallDict(func, args, nargs, kwargs)
-#endif
-#endif
-
-/* PyObjectCallMethO.proto */
-#if CYTHON_COMPILING_IN_CPYTHON
-static CYTHON_INLINE PyObject* __Pyx_PyObject_CallMethO(PyObject *func, PyObject *arg);
-#endif
-
-/* PyObjectCallOneArg.proto */
-static CYTHON_INLINE PyObject* __Pyx_PyObject_CallOneArg(PyObject *func, PyObject *arg);
-
-/* FetchCommonType.proto */
-static PyTypeObject* __Pyx_FetchCommonType(PyTypeObject* type);
-
-/* CythonFunction.proto */
-#define __Pyx_CyFunction_USED 1
-#define __Pyx_CYFUNCTION_STATICMETHOD  0x01
-#define __Pyx_CYFUNCTION_CLASSMETHOD   0x02
-#define __Pyx_CYFUNCTION_CCLASS        0x04
-#define __Pyx_CyFunction_GetClosure(f)\
-    (((__pyx_CyFunctionObject *) (f))->func_closure)
-#define __Pyx_CyFunction_GetClassObj(f)\
-    (((__pyx_CyFunctionObject *) (f))->func_classobj)
-#define __Pyx_CyFunction_Defaults(type, f)\
-    ((type *)(((__pyx_CyFunctionObject *) (f))->defaults))
-#define __Pyx_CyFunction_SetDefaultsGetter(f, g)\
-    ((__pyx_CyFunctionObject *) (f))->defaults_getter = (g)
-typedef struct {
-    PyCFunctionObject func;
-#if PY_VERSION_HEX < 0x030500A0
-    PyObject *func_weakreflist;
-#endif
-    PyObject *func_dict;
-    PyObject *func_name;
-    PyObject *func_qualname;
-    PyObject *func_doc;
-    PyObject *func_globals;
-    PyObject *func_code;
-    PyObject *func_closure;
-    PyObject *func_classobj;
-    void *defaults;
-    int defaults_pyobjects;
-    int flags;
-    PyObject *defaults_tuple;
-    PyObject *defaults_kwdict;
-    PyObject *(*defaults_getter)(PyObject *);
-    PyObject *func_annotations;
-} __pyx_CyFunctionObject;
-static PyTypeObject *__pyx_CyFunctionType = 0;
-#define __Pyx_CyFunction_NewEx(ml, flags, qualname, self, module, globals, code)\
-    __Pyx_CyFunction_New(__pyx_CyFunctionType, ml, flags, qualname, self, module, globals, code)
-static PyObject *__Pyx_CyFunction_New(PyTypeObject *, PyMethodDef *ml,
-                                      int flags, PyObject* qualname,
-                                      PyObject *self,
-                                      PyObject *module, PyObject *globals,
-                                      PyObject* code);
-static CYTHON_INLINE void *__Pyx_CyFunction_InitDefaults(PyObject *m,
-                                                         size_t size,
-                                                         int pyobjects);
-static CYTHON_INLINE void __Pyx_CyFunction_SetDefaultsTuple(PyObject *m,
-                                                            PyObject *tuple);
-static CYTHON_INLINE void __Pyx_CyFunction_SetDefaultsKwDict(PyObject *m,
-                                                             PyObject *dict);
-static CYTHON_INLINE void __Pyx_CyFunction_SetAnnotationsDict(PyObject *m,
-                                                              PyObject *dict);
-static int __pyx_CyFunction_init(void);
-
-/* ArgTypeTest.proto */
-#define __Pyx_ArgTypeTest(obj, type, none_allowed, name, exact)\
-    ((likely((Py_TYPE(obj) == type) | (none_allowed && (obj == Py_None)))) ? 1 :\
-        __Pyx__ArgTypeTest(obj, type, name, exact))
-static int __Pyx__ArgTypeTest(PyObject *obj, PyTypeObject *type, const char *name, int exact);
-
-/* ExtTypeTest.proto */
-static CYTHON_INLINE int __Pyx_TypeTest(PyObject *obj, PyTypeObject *type);
-
-/* IncludeStringH.proto */
-#include <string.h>
-
-/* pyfrozenset_new.proto */
-static CYTHON_INLINE PyObject* __Pyx_PyFrozenSet_New(PyObject* it);
-
-/* py_set_remove.proto */
-static CYTHON_INLINE int __Pyx_PySet_Remove(PyObject *set, PyObject *key);
-
-/* PyObjectFormatSimple.proto */
-#if CYTHON_COMPILING_IN_PYPY
-    #define __Pyx_PyObject_FormatSimple(s, f) (\
-        likely(PyUnicode_CheckExact(s)) ? (Py_INCREF(s), s) :\
-        PyObject_Format(s, f))
-#elif PY_MAJOR_VERSION < 3
-    #define __Pyx_PyObject_FormatSimple(s, f) (\
-        likely(PyUnicode_CheckExact(s)) ? (Py_INCREF(s), s) :\
-        likely(PyString_CheckExact(s)) ? PyUnicode_FromEncodedObject(s, NULL, "strict") :\
-        PyObject_Format(s, f))
-#elif CYTHON_USE_TYPE_SLOTS
-    #define __Pyx_PyObject_FormatSimple(s, f) (\
-        likely(PyUnicode_CheckExact(s)) ? (Py_INCREF(s), s) :\
-        likely(PyLong_CheckExact(s)) ? PyLong_Type.tp_str(s) :\
-        likely(PyFloat_CheckExact(s)) ? PyFloat_Type.tp_str(s) :\
-        PyObject_Format(s, f))
-#else
-    #define __Pyx_PyObject_FormatSimple(s, f) (\
-        likely(PyUnicode_CheckExact(s)) ? (Py_INCREF(s), s) :\
-        PyObject_Format(s, f))
-#endif
-
-/* BuildPyUnicode.proto */
-static PyObject* __Pyx_PyUnicode_BuildFromAscii(Py_ssize_t ulength, char* chars, int clength,
-                                                int prepend_sign, char padding_char);
-
-/* CIntToPyUnicode.proto */
-static CYTHON_INLINE PyObject* __Pyx_PyUnicode_From_Py_ssize_t(Py_ssize_t value, Py_ssize_t width, char padding_char, char format_char);
-
-/* JoinPyUnicode.proto */
-static PyObject* __Pyx_PyUnicode_Join(PyObject* value_tuple, Py_ssize_t value_count, Py_ssize_t result_ulength,
-                                      Py_UCS4 max_char);
-
-/* PySetContains.proto */
-static CYTHON_INLINE int __Pyx_PySet_ContainsTF(PyObject* key, PyObject* set, int eq);
-
-/* PyObjectCallNoArg.proto */
-#if CYTHON_COMPILING_IN_CPYTHON
-static CYTHON_INLINE PyObject* __Pyx_PyObject_CallNoArg(PyObject *func);
-#else
-#define __Pyx_PyObject_CallNoArg(func) __Pyx_PyObject_Call(func, __pyx_empty_tuple, NULL)
-#endif
-
-/* PySequenceContains.proto */
-static CYTHON_INLINE int __Pyx_PySequence_ContainsTF(PyObject* item, PyObject* seq, int eq) {
-    int result = PySequence_Contains(seq, item);
-    return unlikely(result < 0) ? result : (result == (eq == Py_EQ));
-}
-
-/* RaiseTooManyValuesToUnpack.proto */
-static CYTHON_INLINE void __Pyx_RaiseTooManyValuesError(Py_ssize_t expected);
-
-/* RaiseNeedMoreValuesToUnpack.proto */
-static CYTHON_INLINE void __Pyx_RaiseNeedMoreValuesError(Py_ssize_t index);
-
-/* IterFinish.proto */
-static CYTHON_INLINE int __Pyx_IterFinish(void);
-
-/* UnpackItemEndCheck.proto */
-static int __Pyx_IternextUnpackEndCheck(PyObject *retval, Py_ssize_t expected);
-
-/* set_iter.proto */
-static CYTHON_INLINE PyObject* __Pyx_set_iterator(PyObject* iterable, int is_set,
-                                                  Py_ssize_t* p_orig_length, int* p_source_is_set);
-static CYTHON_INLINE int __Pyx_set_iter_next(
-        PyObject* iter_obj, Py_ssize_t orig_length,
-        Py_ssize_t* ppos, PyObject **value,
-        int source_is_set);
-
-/* GetItemInt.proto */
-#define __Pyx_GetItemInt(o, i, type, is_signed, to_py_func, is_list, wraparound, boundscheck)\
-    (__Pyx_fits_Py_ssize_t(i, type, is_signed) ?\
-    __Pyx_GetItemInt_Fast(o, (Py_ssize_t)i, is_list, wraparound, boundscheck) :\
-    (is_list ? (PyErr_SetString(PyExc_IndexError, "list index out of range"), (PyObject*)NULL) :\
-               __Pyx_GetItemInt_Generic(o, to_py_func(i))))
-#define __Pyx_GetItemInt_List(o, i, type, is_signed, to_py_func, is_list, wraparound, boundscheck)\
-    (__Pyx_fits_Py_ssize_t(i, type, is_signed) ?\
-    __Pyx_GetItemInt_List_Fast(o, (Py_ssize_t)i, wraparound, boundscheck) :\
-    (PyErr_SetString(PyExc_IndexError, "list index out of range"), (PyObject*)NULL))
-static CYTHON_INLINE PyObject *__Pyx_GetItemInt_List_Fast(PyObject *o, Py_ssize_t i,
-                                                              int wraparound, int boundscheck);
-#define __Pyx_GetItemInt_Tuple(o, i, type, is_signed, to_py_func, is_list, wraparound, boundscheck)\
-    (__Pyx_fits_Py_ssize_t(i, type, is_signed) ?\
-    __Pyx_GetItemInt_Tuple_Fast(o, (Py_ssize_t)i, wraparound, boundscheck) :\
-    (PyErr_SetString(PyExc_IndexError, "tuple index out of range"), (PyObject*)NULL))
-static CYTHON_INLINE PyObject *__Pyx_GetItemInt_Tuple_Fast(PyObject *o, Py_ssize_t i,
-                                                              int wraparound, int boundscheck);
-static PyObject *__Pyx_GetItemInt_Generic(PyObject *o, PyObject* j);
-static CYTHON_INLINE PyObject *__Pyx_GetItemInt_Fast(PyObject *o, Py_ssize_t i,
-                                                     int is_list, int wraparound, int boundscheck);
-
-/* ObjectGetItem.proto */
-#if CYTHON_USE_TYPE_SLOTS
-static CYTHON_INLINE PyObject *__Pyx_PyObject_GetItem(PyObject *obj, PyObject* key);
-#else
-#define __Pyx_PyObject_GetItem(obj, key)  PyObject_GetItem(obj, key)
-#endif
-
-/* PyErrExceptionMatches.proto */
-#if CYTHON_FAST_THREAD_STATE
-#define __Pyx_PyErr_ExceptionMatches(err) __Pyx_PyErr_ExceptionMatchesInState(__pyx_tstate, err)
-static CYTHON_INLINE int __Pyx_PyErr_ExceptionMatchesInState(PyThreadState* tstate, PyObject* err);
-#else
-#define __Pyx_PyErr_ExceptionMatches(err)  PyErr_ExceptionMatches(err)
-#endif
-
-/* GetAttr.proto */
-static CYTHON_INLINE PyObject *__Pyx_GetAttr(PyObject *, PyObject *);
-
-/* GetAttr3.proto */
-static CYTHON_INLINE PyObject *__Pyx_GetAttr3(PyObject *, PyObject *, PyObject *);
-
-/* DictGetItem.proto */
-#if PY_MAJOR_VERSION >= 3 && !CYTHON_COMPILING_IN_PYPY
-static PyObject *__Pyx_PyDict_GetItem(PyObject *d, PyObject* key);
-#define __Pyx_PyObject_Dict_GetItem(obj, name)\
-    (likely(PyDict_CheckExact(obj)) ?\
-     __Pyx_PyDict_GetItem(obj, name) : PyObject_GetItem(obj, name))
-#else
-#define __Pyx_PyDict_GetItem(d, key) PyObject_GetItem(d, key)
-#define __Pyx_PyObject_Dict_GetItem(obj, name)  PyObject_GetItem(obj, name)
-#endif
-
-/* SaveResetException.proto */
-#if CYTHON_FAST_THREAD_STATE
-#define __Pyx_ExceptionSave(type, value, tb)  __Pyx__ExceptionSave(__pyx_tstate, type, value, tb)
-static CYTHON_INLINE void __Pyx__ExceptionSave(PyThreadState *tstate, PyObject **type, PyObject **value, PyObject **tb);
-#define __Pyx_ExceptionReset(type, value, tb)  __Pyx__ExceptionReset(__pyx_tstate, type, value, tb)
-static CYTHON_INLINE void __Pyx__ExceptionReset(PyThreadState *tstate, PyObject *type, PyObject *value, PyObject *tb);
-#else
-#define __Pyx_ExceptionSave(type, value, tb)   PyErr_GetExcInfo(type, value, tb)
-#define __Pyx_ExceptionReset(type, value, tb)  PyErr_SetExcInfo(type, value, tb)
-#endif
-
-/* FastTypeChecks.proto */
-#if CYTHON_COMPILING_IN_CPYTHON
-#define __Pyx_TypeCheck(obj, type) __Pyx_IsSubtype(Py_TYPE(obj), (PyTypeObject *)type)
-static CYTHON_INLINE int __Pyx_IsSubtype(PyTypeObject *a, PyTypeObject *b);
-static CYTHON_INLINE int __Pyx_PyErr_GivenExceptionMatches(PyObject *err, PyObject *type);
-static CYTHON_INLINE int __Pyx_PyErr_GivenExceptionMatches2(PyObject *err, PyObject *type1, PyObject *type2);
-#else
-#define __Pyx_TypeCheck(obj, type) PyObject_TypeCheck(obj, (PyTypeObject *)type)
-#define __Pyx_PyErr_GivenExceptionMatches(err, type) PyErr_GivenExceptionMatches(err, type)
-#define __Pyx_PyErr_GivenExceptionMatches2(err, type1, type2) (PyErr_GivenExceptionMatches(err, type1) || PyErr_GivenExceptionMatches(err, type2))
-#endif
-#define __Pyx_PyException_Check(obj) __Pyx_TypeCheck(obj, PyExc_Exception)
-
-/* GetException.proto */
-#if CYTHON_FAST_THREAD_STATE
-#define __Pyx_GetException(type, value, tb)  __Pyx__GetException(__pyx_tstate, type, value, tb)
-static int __Pyx__GetException(PyThreadState *tstate, PyObject **type, PyObject **value, PyObject **tb);
-#else
-static int __Pyx_GetException(PyObject **type, PyObject **value, PyObject **tb);
-#endif
-
-/* SwapException.proto */
-#if CYTHON_FAST_THREAD_STATE
-#define __Pyx_ExceptionSwap(type, value, tb)  __Pyx__ExceptionSwap(__pyx_tstate, type, value, tb)
-static CYTHON_INLINE void __Pyx__ExceptionSwap(PyThreadState *tstate, PyObject **type, PyObject **value, PyObject **tb);
-#else
-static CYTHON_INLINE void __Pyx_ExceptionSwap(PyObject **type, PyObject **value, PyObject **tb);
-#endif
-
-/* BytesEquals.proto */
-static CYTHON_INLINE int __Pyx_PyBytes_Equals(PyObject* s1, PyObject* s2, int equals);
-
-/* UnicodeEquals.proto */
-static CYTHON_INLINE int __Pyx_PyUnicode_Equals(PyObject* s1, PyObject* s2, int equals);
-
-/* ListAppend.proto */
-#if CYTHON_USE_PYLIST_INTERNALS && CYTHON_ASSUME_SAFE_MACROS
-static CYTHON_INLINE int __Pyx_PyList_Append(PyObject* list, PyObject* x) {
-    PyListObject* L = (PyListObject*) list;
-    Py_ssize_t len = Py_SIZE(list);
-    if (likely(L->allocated > len) & likely(len > (L->allocated >> 1))) {
-        Py_INCREF(x);
-        PyList_SET_ITEM(list, len, x);
-        Py_SIZE(list) = len+1;
-        return 0;
-    }
-    return PyList_Append(list, x);
-}
-#else
-#define __Pyx_PyList_Append(L,x) PyList_Append(L,x)
-#endif
-
-/* CIntToPyUnicode.proto */
-static CYTHON_INLINE PyObject* __Pyx_PyUnicode_From_size_t(size_t value, Py_ssize_t width, char padding_char, char format_char);
-
-/* RaiseNoneIterError.proto */
-static CYTHON_INLINE void __Pyx_RaiseNoneNotIterableError(void);
-
-/* CIntToPyUnicode.proto */
-static CYTHON_INLINE PyObject* __Pyx_PyUnicode_From_unsigned_char(unsigned char value, Py_ssize_t width, char padding_char, char format_char);
-
-/* None.proto */
-static CYTHON_INLINE void __Pyx_RaiseUnboundLocalError(const char *varname);
-
-/* decode_c_string_utf16.proto */
-static CYTHON_INLINE PyObject *__Pyx_PyUnicode_DecodeUTF16(const char *s, Py_ssize_t size, const char *errors) {
-    int byteorder = 0;
-    return PyUnicode_DecodeUTF16(s, size, errors, &byteorder);
-}
-static CYTHON_INLINE PyObject *__Pyx_PyUnicode_DecodeUTF16LE(const char *s, Py_ssize_t size, const char *errors) {
-    int byteorder = -1;
-    return PyUnicode_DecodeUTF16(s, size, errors, &byteorder);
-}
-static CYTHON_INLINE PyObject *__Pyx_PyUnicode_DecodeUTF16BE(const char *s, Py_ssize_t size, const char *errors) {
-    int byteorder = 1;
-    return PyUnicode_DecodeUTF16(s, size, errors, &byteorder);
-}
-
-/* decode_c_string.proto */
-static CYTHON_INLINE PyObject* __Pyx_decode_c_string(
-         const char* cstring, Py_ssize_t start, Py_ssize_t stop,
-         const char* encoding, const char* errors,
-         PyObject* (*decode_func)(const char *s, Py_ssize_t size, const char *errors));
-
-/* Import.proto */
-static PyObject *__Pyx_Import(PyObject *name, PyObject *from_list, int level);
-
-/* ImportFrom.proto */
-static PyObject* __Pyx_ImportFrom(PyObject* module, PyObject* name);
-
-/* HasAttr.proto */
-static CYTHON_INLINE int __Pyx_HasAttr(PyObject *, PyObject *);
-
-/* CallNextTpDealloc.proto */
-static void __Pyx_call_next_tp_dealloc(PyObject* obj, destructor current_tp_dealloc);
-
-/* PyObject_GenericGetAttrNoDict.proto */
-#if CYTHON_USE_TYPE_SLOTS && CYTHON_USE_PYTYPE_LOOKUP && PY_VERSION_HEX < 0x03070000
-static CYTHON_INLINE PyObject* __Pyx_PyObject_GenericGetAttrNoDict(PyObject* obj, PyObject* attr_name);
-#else
-#define __Pyx_PyObject_GenericGetAttrNoDict PyObject_GenericGetAttr
-#endif
-
-/* PyObject_GenericGetAttr.proto */
-#if CYTHON_USE_TYPE_SLOTS && CYTHON_USE_PYTYPE_LOOKUP && PY_VERSION_HEX < 0x03070000
-static PyObject* __Pyx_PyObject_GenericGetAttr(PyObject* obj, PyObject* attr_name);
-#else
-#define __Pyx_PyObject_GenericGetAttr PyObject_GenericGetAttr
-#endif
-
-/* SetVTable.proto */
-static int __Pyx_SetVtable(PyObject *dict, void *vtable);
-
-/* SetupReduce.proto */
-static int __Pyx_setup_reduce(PyObject* type_obj);
-
-/* GetVTable.proto */
-static void* __Pyx_GetVtable(PyObject *dict);
-
-/* GetNameInClass.proto */
-static PyObject *__Pyx_GetNameInClass(PyObject *nmspace, PyObject *name);
-
-/* CLineInTraceback.proto */
-#ifdef CYTHON_CLINE_IN_TRACEBACK
-#define __Pyx_CLineForTraceback(tstate, c_line)  (((CYTHON_CLINE_IN_TRACEBACK)) ? c_line : 0)
-#else
-static int __Pyx_CLineForTraceback(PyThreadState *tstate, int c_line);
-#endif
-
-/* CodeObjectCache.proto */
-typedef struct {
-    PyCodeObject* code_object;
-    int code_line;
-} __Pyx_CodeObjectCacheEntry;
-struct __Pyx_CodeObjectCache {
-    int count;
-    int max_count;
-    __Pyx_CodeObjectCacheEntry* entries;
-};
-static struct __Pyx_CodeObjectCache __pyx_code_cache = {0,0,NULL};
-static int __pyx_bisect_code_objects(__Pyx_CodeObjectCacheEntry* entries, int count, int code_line);
-static PyCodeObject *__pyx_find_code_object(int code_line);
-static void __pyx_insert_code_object(int code_line, PyCodeObject* code_object);
-
-/* AddTraceback.proto */
-static void __Pyx_AddTraceback(const char *funcname, int c_line,
-                               int py_line, const char *filename);
-
-/* CIntToPy.proto */
-static CYTHON_INLINE PyObject* __Pyx_PyInt_From_int(int value);
-
-/* CIntToPy.proto */
-static CYTHON_INLINE PyObject* __Pyx_PyInt_From_unsigned_char(unsigned char value);
-
-/* CIntToPy.proto */
-static CYTHON_INLINE PyObject* __Pyx_PyInt_From_long(long value);
-
-/* CIntToPy.proto */
-static CYTHON_INLINE PyObject* __Pyx_PyInt_From_MDB_dbi(MDB_dbi value);
-
-/* CIntToPy.proto */
-static CYTHON_INLINE PyObject* __Pyx_PyInt_From_char(char value);
-
-/* CIntFromPy.proto */
-static CYTHON_INLINE size_t __Pyx_PyInt_As_size_t(PyObject *);
-
-/* CIntFromPy.proto */
-static CYTHON_INLINE unsigned char __Pyx_PyInt_As_unsigned_char(PyObject *);
-
-/* CIntFromPy.proto */
-static CYTHON_INLINE long __Pyx_PyInt_As_long(PyObject *);
-
-/* BytesContains.proto */
-static CYTHON_INLINE int __Pyx_BytesContains(PyObject* bytes, char character);
-
-/* CIntFromPy.proto */
-static CYTHON_INLINE int __Pyx_PyInt_As_int(PyObject *);
-
-/* PyObjectCallMethod1.proto */
-static PyObject* __Pyx_PyObject_CallMethod1(PyObject* obj, PyObject* method_name, PyObject* arg);
-static PyObject* __Pyx__PyObject_CallMethod1(PyObject* method, PyObject* arg);
-
-/* CoroutineBase.proto */
-typedef PyObject *(*__pyx_coroutine_body_t)(PyObject *, PyThreadState *, PyObject *);
-typedef struct {
-    PyObject_HEAD
-    __pyx_coroutine_body_t body;
-    PyObject *closure;
-    PyObject *exc_type;
-    PyObject *exc_value;
-    PyObject *exc_traceback;
-    PyObject *gi_weakreflist;
-    PyObject *classobj;
-    PyObject *yieldfrom;
-    PyObject *gi_name;
-    PyObject *gi_qualname;
-    PyObject *gi_modulename;
-    PyObject *gi_code;
-    int resume_label;
-    char is_running;
-} __pyx_CoroutineObject;
-static __pyx_CoroutineObject *__Pyx__Coroutine_New(
-    PyTypeObject *type, __pyx_coroutine_body_t body, PyObject *code, PyObject *closure,
-    PyObject *name, PyObject *qualname, PyObject *module_name);
-static __pyx_CoroutineObject *__Pyx__Coroutine_NewInit(
-            __pyx_CoroutineObject *gen, __pyx_coroutine_body_t body, PyObject *code, PyObject *closure,
-            PyObject *name, PyObject *qualname, PyObject *module_name);
-static int __Pyx_Coroutine_clear(PyObject *self);
-static PyObject *__Pyx_Coroutine_Send(PyObject *self, PyObject *value);
-static PyObject *__Pyx_Coroutine_Close(PyObject *self);
-static PyObject *__Pyx_Coroutine_Throw(PyObject *gen, PyObject *args);
-#define __Pyx_Coroutine_SwapException(self) {\
-    __Pyx_ExceptionSwap(&(self)->exc_type, &(self)->exc_value, &(self)->exc_traceback);\
-    __Pyx_Coroutine_ResetFrameBackpointer(self);\
-    }
-#define __Pyx_Coroutine_ResetAndClearException(self) {\
-    __Pyx_ExceptionReset((self)->exc_type, (self)->exc_value, (self)->exc_traceback);\
-    (self)->exc_type = (self)->exc_value = (self)->exc_traceback = NULL;\
-    }
-#if CYTHON_FAST_THREAD_STATE
-#define __Pyx_PyGen_FetchStopIterationValue(pvalue)\
-    __Pyx_PyGen__FetchStopIterationValue(__pyx_tstate, pvalue)
-#else
-#define __Pyx_PyGen_FetchStopIterationValue(pvalue)\
-    __Pyx_PyGen__FetchStopIterationValue(__Pyx_PyThreadState_Current, pvalue)
-#endif
-static int __Pyx_PyGen__FetchStopIterationValue(PyThreadState *tstate, PyObject **pvalue);
-static CYTHON_INLINE void __Pyx_Coroutine_ResetFrameBackpointer(__pyx_CoroutineObject *self);
-
-/* PatchModuleWithCoroutine.proto */
-static PyObject* __Pyx_Coroutine_patch_module(PyObject* module, const char* py_code);
-
-/* PatchGeneratorABC.proto */
-static int __Pyx_patch_abc(void);
-
-/* Generator.proto */
-#define __Pyx_Generator_USED
-static PyTypeObject *__pyx_GeneratorType = 0;
-#define __Pyx_Generator_CheckExact(obj) (Py_TYPE(obj) == __pyx_GeneratorType)
-#define __Pyx_Generator_New(body, code, closure, name, qualname, module_name)\
-    __Pyx__Coroutine_New(__pyx_GeneratorType, body, code, closure, name, qualname, module_name)
-static PyObject *__Pyx_Generator_Next(PyObject *self);
-static int __pyx_Generator_init(void);
-
-/* CheckBinaryVersion.proto */
-static int __Pyx_check_binary_version(void);
-
-/* PyIdentifierFromString.proto */
-#if !defined(__Pyx_PyIdentifier_FromString)
-#if PY_MAJOR_VERSION < 3
-  #define __Pyx_PyIdentifier_FromString(s) PyString_FromString(s)
-#else
-  #define __Pyx_PyIdentifier_FromString(s) PyUnicode_FromString(s)
-#endif
-#endif
-
-/* ModuleImport.proto */
-static PyObject *__Pyx_ImportModule(const char *name);
-
-/* TypeImport.proto */
-static PyTypeObject *__Pyx_ImportType(const char *module_name, const char *class_name, size_t size, int strict);
-
-/* VoidPtrImport.proto */
-static int __Pyx_ImportVoidPtr(PyObject *module, const char *name, void **p, const char *sig);
-
-/* FunctionImport.proto */
-static int __Pyx_ImportFunction(PyObject *module, const char *funcname, void (**f)(void), const char *sig);
-
-/* InitStrings.proto */
-static int __Pyx_InitStrings(__Pyx_StringTabEntry *t);
-
-static void __pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_resize(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *__pyx_v_self, size_t __pyx_v_ct); /* proto*/
-static unsigned char *__pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_get_item(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *__pyx_v_self, PyObject *__pyx_v_i); /* proto*/
-static void __pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph__data_from_lookup(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self, PyObject *__pyx_v_lookup, struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_store); /* proto*/
-static void __pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_set(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self, PyObject *__pyx_v_trp, int __pyx_skip_dispatch); /* proto*/
-static void __pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_remove_triples(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self, PyObject *__pyx_v_pattern, int __pyx_skip_dispatch); /* proto*/
-static PyObject *__pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_as_rdflib(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self, int __pyx_skip_dispatch); /* proto*/
-static PyObject *__pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph__slice(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self, PyObject *__pyx_v_s, PyObject *__pyx_v_p, PyObject *__pyx_v_o); /* proto*/
-static PyObject *__pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_lookup(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self, PyObject *__pyx_v_s, PyObject *__pyx_v_p, PyObject *__pyx_v_o, int __pyx_skip_dispatch); /* proto*/
-static PyObject *__pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_terms(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self, PyObject *__pyx_v_type, int __pyx_skip_dispatch); /* proto*/
-static PyObject *__pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_as_rdflib(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr *__pyx_v_self, int __pyx_skip_dispatch); /* proto*/
-static PyObject *__pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_stats(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, int __pyx_skip_dispatch); /* proto*/
-static size_t __pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore__len(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, int __pyx_skip_dispatch, struct __pyx_opt_args_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore__len *__pyx_optional_args); /* proto*/
-static PyObject *__pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_add(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, PyObject *__pyx_v_triple, int __pyx_skip_dispatch, struct __pyx_opt_args_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_add *__pyx_optional_args); /* proto*/
-static PyObject *__pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_add_graph(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, PyObject *__pyx_v_graph, int __pyx_skip_dispatch); /* proto*/
-static void __pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore__add_graph(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, unsigned char *__pyx_v_pk_c, size_t __pyx_v_pk_size, int __pyx_skip_dispatch); /* proto*/
-static void __pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore__remove(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, PyObject *__pyx_v_triple_pattern, int __pyx_skip_dispatch, struct __pyx_opt_args_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore__remove *__pyx_optional_args); /* proto*/
-static void __pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore__index_triple(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, PyObject *__pyx_v_op, unsigned char *__pyx_v_spok); /* proto*/
-static void __pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore__remove_graph(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, PyObject *__pyx_v_gr_uri, int __pyx_skip_dispatch); /* proto*/
-static struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *__pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_triple_keys(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, PyObject *__pyx_v_triple_pattern, int __pyx_skip_dispatch, struct __pyx_opt_args_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_triple_keys *__pyx_optional_args); /* proto*/
-static struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *__pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore__lookup(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, PyObject *__pyx_v_triple_pattern); /* proto*/
-static struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *__pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore__lookup_1bound(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, unsigned char __pyx_v_idx, PyObject *__pyx_v_term); /* proto*/
-static struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *__pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore__lookup_2bound(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, unsigned char __pyx_v_idx1, PyObject *__pyx_v_term1, unsigned char __pyx_v_idx2, PyObject *__pyx_v_term2); /* proto*/
-static struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *__pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore__all_term_keys(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, PyObject *__pyx_v_term_type, int __pyx_skip_dispatch); /* proto*/
-static PyObject *__pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_all_namespaces(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, int __pyx_skip_dispatch); /* proto*/
-static PyObject *__pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_all_contexts(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, int __pyx_skip_dispatch, struct __pyx_opt_args_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_all_contexts *__pyx_optional_args); /* proto*/
-static PyObject *__pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_from_key(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, unsigned char *__pyx_v_key); /* proto*/
-static PyObject *__pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_from_trp_key(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, unsigned char *__pyx_v_key); /* proto*/
-static CYTHON_INLINE void __pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore__to_key(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, PyObject *__pyx_v_term, __pyx_t_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Key *__pyx_v_key); /* proto*/
-static CYTHON_INLINE void __pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore__to_triple_key(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, PyObject *__pyx_v_terms, __pyx_t_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_TripleKey *__pyx_v_tkey); /* proto*/
-static void __pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore__append(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, unsigned char *__pyx_v_value, size_t __pyx_v_vlen, __pyx_t_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Key *__pyx_v_nkey, struct __pyx_opt_args_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore__append *__pyx_optional_args); /* proto*/
-static void __pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore__next_key(CYTHON_UNUSED struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, unsigned char *__pyx_v_key, __pyx_t_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Key *__pyx_v_nkey); /* proto*/
-
-/* Module declarations from 'libc.stdint' */
-
-/* Module declarations from 'posix.types' */
-
-/* Module declarations from 'lakesuperior.cy_include.cylmdb' */
-
-/* Module declarations from 'lakesuperior.store.base_lmdb_store' */
-static PyTypeObject *__pyx_ptype_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore = 0;
-static int *__pyx_vp_12lakesuperior_5store_15base_lmdb_store_rc = 0;
-#define __pyx_v_12lakesuperior_5store_15base_lmdb_store_rc (*__pyx_vp_12lakesuperior_5store_15base_lmdb_store_rc)
-static size_t *__pyx_vp_12lakesuperior_5store_15base_lmdb_store_i = 0;
-#define __pyx_v_12lakesuperior_5store_15base_lmdb_store_i (*__pyx_vp_12lakesuperior_5store_15base_lmdb_store_i)
-static struct MDB_val *__pyx_vp_12lakesuperior_5store_15base_lmdb_store_key_v = 0;
-#define __pyx_v_12lakesuperior_5store_15base_lmdb_store_key_v (*__pyx_vp_12lakesuperior_5store_15base_lmdb_store_key_v)
-static struct MDB_val *__pyx_vp_12lakesuperior_5store_15base_lmdb_store_data_v = 0;
-#define __pyx_v_12lakesuperior_5store_15base_lmdb_store_data_v (*__pyx_vp_12lakesuperior_5store_15base_lmdb_store_data_v)
-static MDB_dbi *__pyx_vp_12lakesuperior_5store_15base_lmdb_store_dbi = 0;
-#define __pyx_v_12lakesuperior_5store_15base_lmdb_store_dbi (*__pyx_vp_12lakesuperior_5store_15base_lmdb_store_dbi)
-static void (*__pyx_f_12lakesuperior_5store_15base_lmdb_store__check)(int, struct __pyx_opt_args_12lakesuperior_5store_15base_lmdb_store__check *__pyx_optional_args); /*proto*/
-
-/* Module declarations from 'cpython.mem' */
-
-/* Module declarations from 'libc.string' */
-
-/* Module declarations from 'libc.stdlib' */
-
-/* Module declarations from 'lakesuperior.store.ldp_rs.term' */
-static unsigned char *__pyx_vp_12lakesuperior_5store_6ldp_rs_4term_term_type = 0;
-#define __pyx_v_12lakesuperior_5store_6ldp_rs_4term_term_type (*__pyx_vp_12lakesuperior_5store_6ldp_rs_4term_term_type)
-static unsigned char **__pyx_vp_12lakesuperior_5store_6ldp_rs_4term_pack_fmt = 0;
-#define __pyx_v_12lakesuperior_5store_6ldp_rs_4term_pack_fmt (*__pyx_vp_12lakesuperior_5store_6ldp_rs_4term_pack_fmt)
-static unsigned char **__pyx_vp_12lakesuperior_5store_6ldp_rs_4term_term_data = 0;
-#define __pyx_v_12lakesuperior_5store_6ldp_rs_4term_term_data (*__pyx_vp_12lakesuperior_5store_6ldp_rs_4term_term_data)
-static unsigned char **__pyx_vp_12lakesuperior_5store_6ldp_rs_4term_term_datatype = 0;
-#define __pyx_v_12lakesuperior_5store_6ldp_rs_4term_term_datatype (*__pyx_vp_12lakesuperior_5store_6ldp_rs_4term_term_datatype)
-static unsigned char **__pyx_vp_12lakesuperior_5store_6ldp_rs_4term_term_lang = 0;
-#define __pyx_v_12lakesuperior_5store_6ldp_rs_4term_term_lang (*__pyx_vp_12lakesuperior_5store_6ldp_rs_4term_term_lang)
-static int (*__pyx_f_12lakesuperior_5store_6ldp_rs_4term_serialize)(PyObject *, unsigned char **, size_t *); /*proto*/
-static PyObject *(*__pyx_f_12lakesuperior_5store_6ldp_rs_4term_deserialize)(unsigned char *, size_t); /*proto*/
-
-/* Module declarations from 'lakesuperior.store.ldp_rs.lmdb_triplestore' */
-static PyTypeObject *__pyx_ptype_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet = 0;
-static PyTypeObject *__pyx_ptype_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph = 0;
-static PyTypeObject *__pyx_ptype_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr = 0;
-static PyTypeObject *__pyx_ptype_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore = 0;
-static PyTypeObject *__pyx_ptype_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple = 0;
-static PyTypeObject *__pyx_ptype_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr = 0;
-static PyTypeObject *__pyx_ptype_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_2_contexts = 0;
-static PyTypeObject *__pyx_ptype_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_3_triples = 0;
-static PyTypeObject *__pyx_ptype_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_4_all_terms = 0;
-static unsigned char __pyx_v_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_first_key[5];
-static unsigned char __pyx_v_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_lookup_rank[3];
-static unsigned char __pyx_v_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_lookup_ordering[3][3];
-static unsigned char __pyx_v_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_lookup_ordering_2bound[3][3];
-static CYTHON_INLINE void __pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore__hash(unsigned char const *, size_t, unsigned char *); /*proto*/
-static PyObject *__pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_unpickle_SimpleGraph__set_state(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *, PyObject *); /*proto*/
-static PyObject *__pyx_f_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_unpickle_Imr__set_state(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr *, PyObject *); /*proto*/
-#define __Pyx_MODULE_NAME "lakesuperior.store.ldp_rs.lmdb_triplestore"
-extern int __pyx_module_is_main_lakesuperior__store__ldp_rs__lmdb_triplestore;
-int __pyx_module_is_main_lakesuperior__store__ldp_rs__lmdb_triplestore = 0;
-
-/* Implementation of 'lakesuperior.store.ldp_rs.lmdb_triplestore' */
-static PyObject *__pyx_builtin_MemoryError;
-static PyObject *__pyx_builtin_range;
-static PyObject *__pyx_builtin_TypeError;
-static PyObject *__pyx_builtin_ValueError;
-static PyObject *__pyx_builtin_hex;
-static PyObject *__pyx_builtin_id;
-static PyObject *__pyx_builtin_super;
-static PyObject *__pyx_builtin_RuntimeError;
-static PyObject *__pyx_builtin_enumerate;
-static PyObject *__pyx_builtin_all;
-static PyObject *__pyx_builtin_any;
-static const char __pyx_k_c[] = "c:";
-static const char __pyx_k_o[] = "o";
-static const char __pyx_k_p[] = "p";
-static const char __pyx_k_s[] = "s";
-static const char __pyx_k__8[] = "<";
-static const char __pyx_k__9[] = " @";
-static const char __pyx_k_ct[] = "ct";
-static const char __pyx_k_eq[] = "__eq__";
-static const char __pyx_k_fn[] = "fn";
-static const char __pyx_k_id[] = "id";
-static const char __pyx_k_or[] = "__or__";
-static const char __pyx_k_Add[] = "Add ";
-static const char __pyx_k_DBI[] = "DBI: ";
-static const char __pyx_k_Key[] = "Key ";
-static const char __pyx_k__10[] = ">";
-static const char __pyx_k__11[] = ".";
-static const char __pyx_k__12[] = ", ";
-static const char __pyx_k__27[] = ": ";
-static const char __pyx_k_add[] = "add";
-static const char __pyx_k_all[] = "all";
-static const char __pyx_k_and[] = "__and__";
-static const char __pyx_k_any[] = "any";
-static const char __pyx_k_hex[] = "hex";
-static const char __pyx_k_ior[] = "__ior__";
-static const char __pyx_k_len[] = "_len";
-static const char __pyx_k_luk[] = "luk: {}";
-static const char __pyx_k_new[] = "__new__";
-static const char __pyx_k_set[] = "set";
-static const char __pyx_k_spo[] = "spo";
-static const char __pyx_k_sub[] = "__sub__";
-static const char __pyx_k_uri[] = "uri";
-static const char __pyx_k_xor[] = "__xor__";
-static const char __pyx_k_Node[] = "Node";
-static const char __pyx_k_args[] = "args";
-static const char __pyx_k_data[] = "data";
-static const char __pyx_k_dict[] = "__dict__";
-static const char __pyx_k_iand[] = "__iand__";
-static const char __pyx_k_init[] = "__init__";
-static const char __pyx_k_isub[] = "__isub__";
-static const char __pyx_k_iter[] = "__iter__";
-static const char __pyx_k_ixor[] = "__ixor__";
-static const char __pyx_k_luk1[] = "luk1: {}";
-static const char __pyx_k_luk2[] = "luk2: {}";
-static const char __pyx_k_main[] = "__main__";
-static const char __pyx_k_name[] = "__name__";
-static const char __pyx_k_o_sp[] = "o:sp";
-static const char __pyx_k_p_so[] = "p:so";
-static const char __pyx_k_pk_c[] = "pk_c";
-static const char __pyx_k_po_s[] = "po:s";
-static const char __pyx_k_s_po[] = "s:po";
-static const char __pyx_k_self[] = "self";
-static const char __pyx_k_send[] = "send";
-static const char __pyx_k_so_p[] = "so:p";
-static const char __pyx_k_sp_o[] = "sp:o";
-static const char __pyx_k_step[] = "step";
-static const char __pyx_k_stop[] = "stop";
-static const char __pyx_k_t_st[] = "t:st";
-static const char __pyx_k_test[] = "__test__";
-static const char __pyx_k_th_t[] = "th:t";
-static const char __pyx_k_Graph[] = "Graph";
-static const char __pyx_k_bytes[] = " bytes.";
-static const char __pyx_k_c_spo[] = "c:spo";
-static const char __pyx_k_class[] = "__class__";
-static const char __pyx_k_close[] = "close";
-static const char __pyx_k_debug[] = "debug";
-static const char __pyx_k_flags[] = "flags";
-static const char __pyx_k_index[] = "index";
-static const char __pyx_k_other[] = "other";
-static const char __pyx_k_range[] = "range";
-static const char __pyx_k_spo_c[] = "spo:c";
-static const char __pyx_k_start[] = "start";
-static const char __pyx_k_stats[] = "stats";
-static const char __pyx_k_store[] = "store";
-static const char __pyx_k_super[] = "super";
-static const char __pyx_k_terms[] = "terms";
-static const char __pyx_k_throw[] = "throw";
-static const char __pyx_k_uri_2[] = " uri=";
-static const char __pyx_k_wraps[] = "wraps";
-static const char __pyx_k_Remove[] = "Remove ";
-static const char __pyx_k_format[] = "format";
-static const char __pyx_k_import[] = "__import__";
-static const char __pyx_k_length[] = " length=";
-static const char __pyx_k_logger[] = "logger";
-static const char __pyx_k_lookup[] = "lookup";
-static const char __pyx_k_ns_pfx[] = "ns:pfx";
-static const char __pyx_k_pfx_ns[] = "pfx:ns";
-static const char __pyx_k_pickle[] = "pickle";
-static const char __pyx_k_quoted[] = "quoted";
-static const char __pyx_k_rdflib[] = "rdflib";
-static const char __pyx_k_reduce[] = "__reduce__";
-static const char __pyx_k_remove[] = "_remove";
-static const char __pyx_k_strict[] = "strict";
-static const char __pyx_k_triple[] = "triple";
-static const char __pyx_k_update[] = "update";
-static const char __pyx_k_Removed[] = "Removed: ";
-static const char __pyx_k_asm_rng[] = "asm_rng: {}";
-static const char __pyx_k_context[] = "context";
-static const char __pyx_k_genexpr[] = "genexpr";
-static const char __pyx_k_idx_add[] = "_idx_add";
-static const char __pyx_k_logging[] = "logging";
-static const char __pyx_k_options[] = "options";
-static const char __pyx_k_pk_size[] = "pk_size";
-static const char __pyx_k_triples[] = "triples";
-static const char __pyx_k_wrapper[] = "_wrapper";
-static const char __pyx_k_DB_label[] = "DB label: ";
-static const char __pyx_k_Removing[] = "Removing ";
-static const char __pyx_k_and_term[] = " and term ";
-static const char __pyx_k_contexts[] = "contexts";
-static const char __pyx_k_db_stats[] = "db_stats";
-static const char __pyx_k_getstate[] = "__getstate__";
-static const char __pyx_k_itemsize[] = "itemsize";
-static const char __pyx_k_length_2[] = ", length=";
-static const char __pyx_k_map_size[] = "map_size";
-static const char __pyx_k_pyx_type[] = "__pyx_type";
-static const char __pyx_k_resource[] = "resource";
-static const char __pyx_k_setstate[] = "__setstate__";
-static const char __pyx_k_to_tuple[] = "to_tuple";
-static const char __pyx_k_use_data[] = "use_data";
-static const char __pyx_k_Allocated[] = "Allocated ";
-static const char __pyx_k_LmdbError[] = "LmdbError";
-static const char __pyx_k_Page_size[] = "Page size: ";
-static const char __pyx_k_TypeError[] = "TypeError";
-static const char __pyx_k_add_graph[] = "add_graph";
-static const char __pyx_k_all_terms[] = "all_terms";
-static const char __pyx_k_as_rdflib[] = "as_rdflib";
-static const char __pyx_k_dbi_flags[] = "dbi_flags";
-static const char __pyx_k_enumerate[] = "enumerate";
-static const char __pyx_k_from_main[] = " from main.";
-static const char __pyx_k_functools[] = "functools";
-static const char __pyx_k_getLogger[] = "getLogger";
-static const char __pyx_k_is_txn_rw[] = "is_txn_rw";
-static const char __pyx_k_pyx_state[] = "__pyx_state";
-static const char __pyx_k_reduce_ex[] = "__reduce_ex__";
-static const char __pyx_k_Double_key[] = "Double key ";
-static const char __pyx_k_Lookup_key[] = "Lookup key: {}";
-static const char __pyx_k_Term_order[] = "Term order: {}";
-static const char __pyx_k_ValueError[] = "ValueError";
-static const char __pyx_k_dbi_labels[] = "dbi_labels";
-static const char __pyx_k_identifier[] = "identifier";
-static const char __pyx_k_idx_remove[] = "_idx_remove";
-static const char __pyx_k_ms_entries[] = "ms_entries";
-static const char __pyx_k_pyx_result[] = "__pyx_result";
-static const char __pyx_k_pyx_vtable[] = "__pyx_vtable__";
-static const char __pyx_k_ret_offset[] = "ret_offset: {}";
-static const char __pyx_k_term_order[] = "term order: {}";
-static const char __pyx_k_to_indices[] = " to indices.";
-static const char __pyx_k_Entries_for[] = "Entries for ";
-static const char __pyx_k_LUK_offsets[] = "LUK offsets: {}, {}";
-static const char __pyx_k_MemoryError[] = "MemoryError";
-static const char __pyx_k_PickleError[] = "PickleError";
-static const char __pyx_k_add_graph_2[] = "_add_graph";
-static const char __pyx_k_at_position[] = " at position ";
-static const char __pyx_k_i_in_0bound[] = "i in 0bound: ";
-static const char __pyx_k_num_triples[] = "num_triples";
-static const char __pyx_k_rdflib_term[] = "rdflib.term";
-static const char __pyx_k_triple_keys[] = "triple_keys";
-static const char __pyx_k_RuntimeError[] = "RuntimeError";
-static const char __pyx_k_all_contexts[] = "all_contexts";
-static const char __pyx_k_from_indices[] = " from indices.";
-static const char __pyx_k_pyx_checksum[] = "__pyx_checksum";
-static const char __pyx_k_rdflib_graph[] = "rdflib.graph";
-static const char __pyx_k_remove_graph[] = "_remove_graph";
-static const char __pyx_k_stringsource[] = "stringsource";
-static const char __pyx_k_Triples_found[] = "Triples found: ";
-static const char __pyx_k_all_term_keys[] = "_all_term_keys";
-static const char __pyx_k_bytes_of_data[] = " bytes of data.";
-static const char __pyx_k_lookup_1bound[] = "lookup 1bound: ";
-static const char __pyx_k_reduce_cython[] = "__reduce_cython__";
-static const char __pyx_k_Database_label[] = "Database label: {}";
-static const char __pyx_k_Invalid_triple[] = "Invalid triple: ";
-static const char __pyx_k_KeyExistsError[] = "KeyExistsError";
-static const char __pyx_k_Looking_in_key[] = "Looking in key: {}";
-static const char __pyx_k_all_namespaces[] = "all_namespaces";
-static const char __pyx_k_exists_already[] = " exists already.";
-static const char __pyx_k_lookup_indices[] = "lookup_indices";
-static const char __pyx_k_remove_triples[] = "remove_triples";
-static const char __pyx_k_triple_pattern[] = "triple_pattern";
-static const char __pyx_k_Adding_to_index[] = "Adding to index `{}`: {}, {}";
-static const char __pyx_k_pyx_PickleError[] = "__pyx_PickleError";
-static const char __pyx_k_setstate_cython[] = "__setstate_cython__";
-static const char __pyx_k_Entries_in_c_spo[] = "Entries in c:spo: ";
-static const char __pyx_k_KeyNotFoundError[] = "KeyNotFoundError";
-static const char __pyx_k_pyx_unpickle_Imr[] = "__pyx_unpickle_Imr";
-static const char __pyx_k_Error_setting_key[] = "Error setting key {}.";
-static const char __pyx_k_normalize_context[] = "_normalize_context";
-static const char __pyx_k_Got_data_in_2bound[] = "Got data in 2bound ({}): {}";
-static const char __pyx_k_Not_found_in_index[] = "Not found in index: ";
-static const char __pyx_k_Wrong_slice_format[] = "Wrong slice format: ";
-static const char __pyx_k_cline_in_traceback[] = "cline_in_traceback";
-static const char __pyx_k_Getting_triples_for[] = "Getting triples for: {}, {}";
-static const char __pyx_k_Looking_up_in_graph[] = "Looking up in graph: ";
-static const char __pyx_k_Removing_from_graph[] = "Removing from graph: ";
-static const char __pyx_k_2bound_lookup_for_term[] = "2bound lookup for term ";
-static const char __pyx_k_Getting_all_DB_triples[] = "Getting all DB triples.";
-static const char __pyx_k_LmdbTriplestore_triples[] = "LmdbTriplestore.triples";
-static const char __pyx_k_to_tuple_locals_genexpr[] = "to_tuple.<locals>.genexpr";
-static const char __pyx_k_DATASET_DEFAULT_GRAPH_ID[] = "DATASET_DEFAULT_GRAPH_ID";
-static const char __pyx_k_Error_gathering_DB_stats[] = "Error gathering DB stats.";
-static const char __pyx_k_LmdbTriplestore_contexts[] = "LmdbTriplestore.contexts";
-static const char __pyx_k_RDFLIB_DEFAULT_GRAPH_URI[] = "RDFLIB_DEFAULT_GRAPH_URI";
-static const char __pyx_k_pyx_unpickle_SimpleGraph[] = "__pyx_unpickle_SimpleGraph";
-static const char __pyx_k_use_data_locals__wrapper[] = "use_data.<locals>._wrapper";
-static const char __pyx_k_LmdbTriplestore_all_terms[] = "LmdbTriplestore.all_terms";
-static const char __pyx_k_Error_getting_data_for_key[] = "Error getting data for key '{}'.";
-static const char __pyx_k_More_than_one_value_found_for[] = "More than one value found for {}, {}.";
-static const char __pyx_k_BAD_DAY_Sequence_exhausted_No_mo[] = "BAD DAY: Sequence exhausted. No more combinations are possible.";
-static const char __pyx_k_Incompatible_checksums_s_vs_0x8d[] = "Incompatible checksums (%s vs 0x8d777f3 = (data))";
-static const char __pyx_k_Incompatible_checksums_s_vs_0xbf[] = "Incompatible checksums (%s vs 0xbf84141 = (data, uri))";
-static const char __pyx_k_Index_operation_is_not_supported[] = "Index operation '{}' is not supported.";
-static const char __pyx_k_Indices_and_not_found_in_LU_keys[] = "Indices {} and {} not found in LU keys.";
-static const char __pyx_k_Store_not_specified_for_triple_l[] = "Store not specified for triple lookup.";
-static const char __pyx_k_lakesuperior_store_base_lmdb_sto[] = "lakesuperior.store.base_lmdb_store";
-static const char __pyx_k_lakesuperior_store_ldp_rs_lmdb_t[] = "lakesuperior.store.ldp_rs.lmdb_triplestore";
-static const char __pyx_k_no_default___reduce___due_to_non[] = "no default __reduce__ due to non-trivial __cinit__";
-static const char __pyx_k_self_curs_self_dbenv_self_dbis_s[] = "self.curs,self.dbenv,self.dbis,self.txn cannot be converted to a Python object for pickling";
-static const char __pyx_k_lakesuperior_store_ldp_rs_lmdb_t_2[] = "lakesuperior/store/ldp_rs/lmdb_triplestore.pyx";
-static PyObject *__pyx_kp_u_2bound_lookup_for_term;
-static PyObject *__pyx_kp_u_Add;
-static PyObject *__pyx_kp_u_Adding_to_index;
-static PyObject *__pyx_kp_u_Allocated;
-static PyObject *__pyx_kp_u_BAD_DAY_Sequence_exhausted_No_mo;
-static PyObject *__pyx_n_s_DATASET_DEFAULT_GRAPH_ID;
-static PyObject *__pyx_kp_u_DBI;
-static PyObject *__pyx_kp_u_DB_label;
-static PyObject *__pyx_kp_u_Database_label;
-static PyObject *__pyx_kp_u_Double_key;
-static PyObject *__pyx_kp_u_Entries_for;
-static PyObject *__pyx_kp_u_Entries_in_c_spo;
-static PyObject *__pyx_kp_u_Error_gathering_DB_stats;
-static PyObject *__pyx_kp_u_Error_getting_data_for_key;
-static PyObject *__pyx_kp_u_Error_setting_key;
-static PyObject *__pyx_kp_u_Getting_all_DB_triples;
-static PyObject *__pyx_kp_u_Getting_triples_for;
-static PyObject *__pyx_kp_u_Got_data_in_2bound;
-static PyObject *__pyx_n_s_Graph;
-static PyObject *__pyx_kp_s_Incompatible_checksums_s_vs_0x8d;
-static PyObject *__pyx_kp_s_Incompatible_checksums_s_vs_0xbf;
-static PyObject *__pyx_kp_u_Index_operation_is_not_supported;
-static PyObject *__pyx_kp_u_Indices_and_not_found_in_LU_keys;
-static PyObject *__pyx_kp_u_Invalid_triple;
-static PyObject *__pyx_kp_u_Key;
-static PyObject *__pyx_n_s_KeyExistsError;
-static PyObject *__pyx_n_s_KeyNotFoundError;
-static PyObject *__pyx_kp_u_LUK_offsets;
-static PyObject *__pyx_n_s_LmdbError;
-static PyObject *__pyx_n_s_LmdbTriplestore_all_terms;
-static PyObject *__pyx_n_s_LmdbTriplestore_contexts;
-static PyObject *__pyx_n_s_LmdbTriplestore_triples;
-static PyObject *__pyx_kp_u_Looking_in_key;
-static PyObject *__pyx_kp_u_Looking_up_in_graph;
-static PyObject *__pyx_kp_u_Lookup_key;
-static PyObject *__pyx_n_s_MemoryError;
-static PyObject *__pyx_kp_u_More_than_one_value_found_for;
-static PyObject *__pyx_n_s_Node;
-static PyObject *__pyx_kp_u_Not_found_in_index;
-static PyObject *__pyx_kp_u_Page_size;
-static PyObject *__pyx_n_s_PickleError;
-static PyObject *__pyx_n_s_RDFLIB_DEFAULT_GRAPH_URI;
-static PyObject *__pyx_kp_u_Remove;
-static PyObject *__pyx_kp_u_Removed;
-static PyObject *__pyx_kp_u_Removing;
-static PyObject *__pyx_kp_u_Removing_from_graph;
-static PyObject *__pyx_n_s_RuntimeError;
-static PyObject *__pyx_kp_u_Store_not_specified_for_triple_l;
-static PyObject *__pyx_kp_u_Term_order;
-static PyObject *__pyx_kp_u_Triples_found;
-static PyObject *__pyx_n_s_TypeError;
-static PyObject *__pyx_n_s_ValueError;
-static PyObject *__pyx_kp_u_Wrong_slice_format;
-static PyObject *__pyx_kp_u__10;
-static PyObject *__pyx_kp_u__11;
-static PyObject *__pyx_kp_u__12;
-static PyObject *__pyx_kp_u__27;
-static PyObject *__pyx_kp_u__8;
-static PyObject *__pyx_kp_u__9;
-static PyObject *__pyx_n_s_add;
-static PyObject *__pyx_n_s_add_graph;
-static PyObject *__pyx_n_s_add_graph_2;
-static PyObject *__pyx_n_s_all;
-static PyObject *__pyx_n_s_all_contexts;
-static PyObject *__pyx_n_s_all_namespaces;
-static PyObject *__pyx_n_s_all_term_keys;
-static PyObject *__pyx_n_s_all_terms;
-static PyObject *__pyx_n_s_and;
-static PyObject *__pyx_kp_u_and_term;
-static PyObject *__pyx_n_s_any;
-static PyObject *__pyx_n_s_args;
-static PyObject *__pyx_n_s_as_rdflib;
-static PyObject *__pyx_kp_u_asm_rng;
-static PyObject *__pyx_kp_u_at_position;
-static PyObject *__pyx_kp_u_bytes;
-static PyObject *__pyx_kp_u_bytes_of_data;
-static PyObject *__pyx_kp_u_c;
-static PyObject *__pyx_kp_u_c_spo;
-static PyObject *__pyx_n_s_class;
-static PyObject *__pyx_n_s_cline_in_traceback;
-static PyObject *__pyx_n_s_close;
-static PyObject *__pyx_n_s_context;
-static PyObject *__pyx_n_s_contexts;
-static PyObject *__pyx_n_s_ct;
-static PyObject *__pyx_n_s_data;
-static PyObject *__pyx_n_u_db_stats;
-static PyObject *__pyx_n_s_dbi_flags;
-static PyObject *__pyx_n_s_dbi_labels;
-static PyObject *__pyx_n_s_debug;
-static PyObject *__pyx_n_s_dict;
-static PyObject *__pyx_n_s_enumerate;
-static PyObject *__pyx_n_s_eq;
-static PyObject *__pyx_kp_u_exists_already;
-static PyObject *__pyx_n_s_flags;
-static PyObject *__pyx_n_s_fn;
-static PyObject *__pyx_n_s_format;
-static PyObject *__pyx_kp_u_from_indices;
-static PyObject *__pyx_kp_u_from_main;
-static PyObject *__pyx_n_s_functools;
-static PyObject *__pyx_n_s_genexpr;
-static PyObject *__pyx_n_s_getLogger;
-static PyObject *__pyx_n_s_getstate;
-static PyObject *__pyx_n_s_hex;
-static PyObject *__pyx_kp_u_i_in_0bound;
-static PyObject *__pyx_n_s_iand;
-static PyObject *__pyx_n_s_id;
-static PyObject *__pyx_n_s_identifier;
-static PyObject *__pyx_n_u_idx_add;
-static PyObject *__pyx_n_u_idx_remove;
-static PyObject *__pyx_n_s_import;
-static PyObject *__pyx_n_s_index;
-static PyObject *__pyx_n_s_init;
-static PyObject *__pyx_n_s_ior;
-static PyObject *__pyx_n_s_is_txn_rw;
-static PyObject *__pyx_n_s_isub;
-static PyObject *__pyx_n_s_itemsize;
-static PyObject *__pyx_n_s_iter;
-static PyObject *__pyx_n_s_ixor;
-static PyObject *__pyx_n_s_lakesuperior_store_base_lmdb_sto;
-static PyObject *__pyx_n_s_lakesuperior_store_ldp_rs_lmdb_t;
-static PyObject *__pyx_kp_s_lakesuperior_store_ldp_rs_lmdb_t_2;
-static PyObject *__pyx_n_s_len;
-static PyObject *__pyx_kp_u_length;
-static PyObject *__pyx_kp_u_length_2;
-static PyObject *__pyx_n_s_logger;
-static PyObject *__pyx_n_s_logging;
-static PyObject *__pyx_n_s_lookup;
-static PyObject *__pyx_kp_u_lookup_1bound;
-static PyObject *__pyx_n_s_lookup_indices;
-static PyObject *__pyx_kp_u_luk;
-static PyObject *__pyx_kp_u_luk1;
-static PyObject *__pyx_kp_u_luk2;
-static PyObject *__pyx_n_s_main;
-static PyObject *__pyx_n_u_map_size;
-static PyObject *__pyx_n_u_ms_entries;
-static PyObject *__pyx_n_s_name;
-static PyObject *__pyx_n_s_new;
-static PyObject *__pyx_kp_s_no_default___reduce___due_to_non;
-static PyObject *__pyx_n_s_normalize_context;
-static PyObject *__pyx_kp_u_ns_pfx;
-static PyObject *__pyx_n_u_num_triples;
-static PyObject *__pyx_n_s_o;
-static PyObject *__pyx_kp_b_o_sp;
-static PyObject *__pyx_kp_u_o_sp;
-static PyObject *__pyx_n_s_options;
-static PyObject *__pyx_n_s_or;
-static PyObject *__pyx_n_s_other;
-static PyObject *__pyx_n_s_p;
-static PyObject *__pyx_kp_b_p_so;
-static PyObject *__pyx_kp_u_p_so;
-static PyObject *__pyx_kp_u_pfx_ns;
-static PyObject *__pyx_n_s_pickle;
-static PyObject *__pyx_n_s_pk_c;
-static PyObject *__pyx_n_s_pk_size;
-static PyObject *__pyx_kp_b_po_s;
-static PyObject *__pyx_kp_u_po_s;
-static PyObject *__pyx_n_s_pyx_PickleError;
-static PyObject *__pyx_n_s_pyx_checksum;
-static PyObject *__pyx_n_s_pyx_result;
-static PyObject *__pyx_n_s_pyx_state;
-static PyObject *__pyx_n_s_pyx_type;
-static PyObject *__pyx_n_s_pyx_unpickle_Imr;
-static PyObject *__pyx_n_s_pyx_unpickle_SimpleGraph;
-static PyObject *__pyx_n_s_pyx_vtable;
-static PyObject *__pyx_n_s_quoted;
-static PyObject *__pyx_n_s_range;
-static PyObject *__pyx_n_s_rdflib;
-static PyObject *__pyx_n_s_rdflib_graph;
-static PyObject *__pyx_n_s_rdflib_term;
-static PyObject *__pyx_n_s_reduce;
-static PyObject *__pyx_n_s_reduce_cython;
-static PyObject *__pyx_n_s_reduce_ex;
-static PyObject *__pyx_n_s_remove;
-static PyObject *__pyx_n_s_remove_graph;
-static PyObject *__pyx_n_s_remove_triples;
-static PyObject *__pyx_n_s_resource;
-static PyObject *__pyx_kp_u_ret_offset;
-static PyObject *__pyx_n_s_s;
-static PyObject *__pyx_kp_b_s_po;
-static PyObject *__pyx_kp_u_s_po;
-static PyObject *__pyx_n_s_self;
-static PyObject *__pyx_kp_s_self_curs_self_dbenv_self_dbis_s;
-static PyObject *__pyx_n_s_send;
-static PyObject *__pyx_n_s_set;
-static PyObject *__pyx_n_s_setstate;
-static PyObject *__pyx_n_s_setstate_cython;
-static PyObject *__pyx_kp_b_so_p;
-static PyObject *__pyx_kp_u_so_p;
-static PyObject *__pyx_kp_b_sp_o;
-static PyObject *__pyx_kp_u_sp_o;
-static PyObject *__pyx_n_u_spo;
-static PyObject *__pyx_kp_u_spo_c;
-static PyObject *__pyx_n_s_start;
-static PyObject *__pyx_n_s_stats;
-static PyObject *__pyx_n_s_step;
-static PyObject *__pyx_n_s_stop;
-static PyObject *__pyx_n_s_store;
-static PyObject *__pyx_n_s_strict;
-static PyObject *__pyx_kp_s_stringsource;
-static PyObject *__pyx_n_s_sub;
-static PyObject *__pyx_n_s_super;
-static PyObject *__pyx_kp_u_t_st;
-static PyObject *__pyx_kp_u_term_order;
-static PyObject *__pyx_n_s_terms;
-static PyObject *__pyx_n_s_test;
-static PyObject *__pyx_kp_u_th_t;
-static PyObject *__pyx_n_s_throw;
-static PyObject *__pyx_kp_u_to_indices;
-static PyObject *__pyx_n_s_to_tuple;
-static PyObject *__pyx_n_s_to_tuple_locals_genexpr;
-static PyObject *__pyx_n_s_triple;
-static PyObject *__pyx_n_s_triple_keys;
-static PyObject *__pyx_n_s_triple_pattern;
-static PyObject *__pyx_n_s_triples;
-static PyObject *__pyx_n_s_update;
-static PyObject *__pyx_n_s_uri;
-static PyObject *__pyx_kp_u_uri_2;
-static PyObject *__pyx_n_s_use_data;
-static PyObject *__pyx_n_s_use_data_locals__wrapper;
-static PyObject *__pyx_n_s_wrapper;
-static PyObject *__pyx_n_s_wraps;
-static PyObject *__pyx_n_s_xor;
-static int __pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet___cinit__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *__pyx_v_self, size_t __pyx_v_ct, unsigned char __pyx_v_itemsize); /* proto */
-static void __pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_2__dealloc__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_8to_tuple_genexpr(PyObject *__pyx_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_4to_tuple(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_6get_item_obj(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *__pyx_v_self, PyObject *__pyx_v_i); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_4data___get__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_8itemsize___get__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_2ct___get__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_4size___get__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_8__reduce_cython__(CYTHON_UNUSED struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_10__setstate_cython__(CYTHON_UNUSED struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *__pyx_v_self, CYTHON_UNUSED PyObject *__pyx_v___pyx_state); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_8use_data__wrapper(CYTHON_UNUSED PyObject *__pyx_self, CYTHON_UNUSED PyObject *__pyx_v_self, PyObject *__pyx_v_other); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_use_data(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v_fn); /* proto */
-static int __pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph___init__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self, PyObject *__pyx_v_data, PyObject *__pyx_v_lookup, PyObject *__pyx_v_store); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_2add(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self, PyObject *__pyx_v_dataset); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_4remove(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self, PyObject *__pyx_v_item); /* proto */
-static Py_ssize_t __pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_6__len__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_8__eq__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self, PyObject *__pyx_v_other); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_10__repr__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_12__str__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_14__sub__(PyObject *__pyx_v_self, PyObject *__pyx_v_other); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_16__isub__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self, PyObject *__pyx_v_other); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_18__and__(PyObject *__pyx_v_self, PyObject *__pyx_v_other); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_20__iand__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self, PyObject *__pyx_v_other); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_22__or__(PyObject *__pyx_v_self, PyObject *__pyx_v_other); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_24__ior__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self, PyObject *__pyx_v_other); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_26__xor__(PyObject *__pyx_v_self, PyObject *__pyx_v_other); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_28__ixor__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self, PyObject *__pyx_v_other); /* proto */
-static int __pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_30__contains__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self, PyObject *__pyx_v_item); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_32__iter__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_34__getitem__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self, PyObject *__pyx_v_item); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_36set(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self, PyObject *__pyx_v_trp); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_38remove_triples(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self, PyObject *__pyx_v_pattern); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_40as_rdflib(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_42lookup(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self, PyObject *__pyx_v_s, PyObject *__pyx_v_p, PyObject *__pyx_v_o); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_44terms(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self, PyObject *__pyx_v_type); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_4data___get__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_46__reduce_cython__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_48__setstate_cython__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *__pyx_v_self, PyObject *__pyx_v___pyx_state); /* proto */
-static int __pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr___init__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr *__pyx_v_self, PyObject *__pyx_v_uri, PyObject *__pyx_v_args, PyObject *__pyx_v_kwargs); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_10identifier___get__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_5graph___get__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_2__repr__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_4__sub__(PyObject *__pyx_v_self, PyObject *__pyx_v_other); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_6__and__(PyObject *__pyx_v_self, PyObject *__pyx_v_other); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_8__or__(PyObject *__pyx_v_self, PyObject *__pyx_v_other); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_10__xor__(PyObject *__pyx_v_self, PyObject *__pyx_v_other); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_12__getitem__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr *__pyx_v_self, PyObject *__pyx_v_item); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_14value(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr *__pyx_v_self, PyObject *__pyx_v_p, PyObject *__pyx_v_strict); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_16as_rdflib(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_3uri___get__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_18__reduce_cython__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_20__setstate_cython__(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr *__pyx_v_self, PyObject *__pyx_v___pyx_state); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_stats(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_2_len(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, PyObject *__pyx_v_context); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_4add(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, PyObject *__pyx_v_triple, PyObject *__pyx_v_context, PyObject *__pyx_v_quoted); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_6add_graph(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, PyObject *__pyx_v_graph); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_8_add_graph(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, unsigned char *__pyx_v_pk_c, size_t __pyx_v_pk_size); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_10_remove(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, PyObject *__pyx_v_triple_pattern, PyObject *__pyx_v_context); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_12_remove_graph(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, PyObject *__pyx_v_gr_uri); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_14contexts(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, PyObject *__pyx_v_triple); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_17triples(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, PyObject *__pyx_v_triple_pattern, PyObject *__pyx_v_context); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_20triple_keys(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, PyObject *__pyx_v_triple_pattern, PyObject *__pyx_v_context); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_22_all_term_keys(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, PyObject *__pyx_v_term_type); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_24all_terms(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, PyObject *__pyx_v_term_type); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_27all_namespaces(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_29all_contexts(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, PyObject *__pyx_v_triple); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_31__reduce_cython__(CYTHON_UNUSED struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_33__setstate_cython__(CYTHON_UNUSED struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *__pyx_v_self, CYTHON_UNUSED PyObject *__pyx_v___pyx_state); /* proto */
-static PyObject *__pyx_pf_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_2__pyx_unpickle_SimpleGraph(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v___pyx_type, long __pyx_v___pyx_checksum, PyObject *__pyx_v___pyx_state); /* proto */
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-  /* function exit code */
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-
-static PyObject *__pyx_tp_new_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet(PyTypeObject *t, PyObject *a, PyObject *k) {
-  struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *p;
-  PyObject *o;
-  if (likely((t->tp_flags & Py_TPFLAGS_IS_ABSTRACT) == 0)) {
-    o = (*t->tp_alloc)(t, 0);
-  } else {
-    o = (PyObject *) PyBaseObject_Type.tp_new(t, __pyx_empty_tuple, 0);
-  }
-  if (unlikely(!o)) return 0;
-  p = ((struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *)o);
-  p->__pyx_vtab = __pyx_vtabptr_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet;
-  if (unlikely(__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_1__cinit__(o, a, k) < 0)) goto bad;
-  return o;
-  bad:
-  Py_DECREF(o); o = 0;
-  return NULL;
-}
-
-static void __pyx_tp_dealloc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet(PyObject *o) {
-  #if CYTHON_USE_TP_FINALIZE
-  if (unlikely(PyType_HasFeature(Py_TYPE(o), Py_TPFLAGS_HAVE_FINALIZE) && Py_TYPE(o)->tp_finalize) && (!PyType_IS_GC(Py_TYPE(o)) || !_PyGC_FINALIZED(o))) {
-    if (PyObject_CallFinalizerFromDealloc(o)) return;
-  }
-  #endif
-  {
-    PyObject *etype, *eval, *etb;
-    PyErr_Fetch(&etype, &eval, &etb);
-    ++Py_REFCNT(o);
-    __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_3__dealloc__(o);
-    --Py_REFCNT(o);
-    PyErr_Restore(etype, eval, etb);
-  }
-  (*Py_TYPE(o)->tp_free)(o);
-}
-
-static PyObject *__pyx_getprop_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_data(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_4data_1__get__(o);
-}
-
-static PyObject *__pyx_getprop_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_itemsize(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_8itemsize_1__get__(o);
-}
-
-static PyObject *__pyx_getprop_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_ct(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_2ct_1__get__(o);
-}
-
-static PyObject *__pyx_getprop_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_size(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_4size_1__get__(o);
-}
-
-static PyMethodDef __pyx_methods_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet[] = {
-  {"to_tuple", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_5to_tuple, METH_NOARGS, __pyx_doc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_4to_tuple},
-  {"get_item_obj", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_7get_item_obj, METH_O, __pyx_doc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_6get_item_obj},
-  {"__reduce_cython__", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_9__reduce_cython__, METH_NOARGS, 0},
-  {"__setstate_cython__", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_11__setstate_cython__, METH_O, 0},
-  {0, 0, 0, 0}
-};
-
-static struct PyGetSetDef __pyx_getsets_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet[] = {
-  {(char *)"data", __pyx_getprop_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_data, 0, (char *)0, 0},
-  {(char *)"itemsize", __pyx_getprop_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_itemsize, 0, (char *)0, 0},
-  {(char *)"ct", __pyx_getprop_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_ct, 0, (char *)0, 0},
-  {(char *)"size", __pyx_getprop_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_9ResultSet_size, 0, (char *)0, 0},
-  {0, 0, 0, 0, 0}
-};
-
-static PyTypeObject __pyx_type_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet = {
-  PyVarObject_HEAD_INIT(0, 0)
-  "lakesuperior.store.ldp_rs.lmdb_triplestore.ResultSet", /*tp_name*/
-  sizeof(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet), /*tp_basicsize*/
-  0, /*tp_itemsize*/
-  __pyx_tp_dealloc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet, /*tp_dealloc*/
-  0, /*tp_print*/
-  0, /*tp_getattr*/
-  0, /*tp_setattr*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*tp_compare*/
-  #endif
-  #if PY_MAJOR_VERSION >= 3
-  0, /*tp_as_async*/
-  #endif
-  0, /*tp_repr*/
-  0, /*tp_as_number*/
-  0, /*tp_as_sequence*/
-  0, /*tp_as_mapping*/
-  0, /*tp_hash*/
-  0, /*tp_call*/
-  0, /*tp_str*/
-  0, /*tp_getattro*/
-  0, /*tp_setattro*/
-  0, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
-  "\n    Pre-allocated result set.\n\n    Data in the set are stored as a 1D contiguous array of characters.\n    Access to elements at an arbitrary index position is achieved by using the\n    ``itemsize`` property multiplied by the index number.\n\n    Key properties:\n\n    ``ct``: number of elements in the set.\n    ``itemsize``: size of each element, in bytes. All elements have the same\n        size.\n    ``size``: Total size, in bytes, of the data set. This is the product of\n        ``itemsize`` and ``ct``.\n    ", /*tp_doc*/
-  0, /*tp_traverse*/
-  0, /*tp_clear*/
-  0, /*tp_richcompare*/
-  0, /*tp_weaklistoffset*/
-  0, /*tp_iter*/
-  0, /*tp_iternext*/
-  __pyx_methods_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet, /*tp_methods*/
-  0, /*tp_members*/
-  __pyx_getsets_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet, /*tp_getset*/
-  0, /*tp_base*/
-  0, /*tp_dict*/
-  0, /*tp_descr_get*/
-  0, /*tp_descr_set*/
-  0, /*tp_dictoffset*/
-  0, /*tp_init*/
-  0, /*tp_alloc*/
-  __pyx_tp_new_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet, /*tp_new*/
-  0, /*tp_free*/
-  0, /*tp_is_gc*/
-  0, /*tp_bases*/
-  0, /*tp_mro*/
-  0, /*tp_cache*/
-  0, /*tp_subclasses*/
-  0, /*tp_weaklist*/
-  0, /*tp_del*/
-  0, /*tp_version_tag*/
-  #if PY_VERSION_HEX >= 0x030400a1
-  0, /*tp_finalize*/
-  #endif
-};
-static struct __pyx_vtabstruct_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph __pyx_vtable_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph;
-
-static PyObject *__pyx_tp_new_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *p;
-  PyObject *o;
-  if (likely((t->tp_flags & Py_TPFLAGS_IS_ABSTRACT) == 0)) {
-    o = (*t->tp_alloc)(t, 0);
-  } else {
-    o = (PyObject *) PyBaseObject_Type.tp_new(t, __pyx_empty_tuple, 0);
-  }
-  if (unlikely(!o)) return 0;
-  p = ((struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *)o);
-  p->__pyx_vtab = __pyx_vtabptr_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph;
-  p->data = ((PyObject*)Py_None); Py_INCREF(Py_None);
-  return o;
-}
-
-static void __pyx_tp_dealloc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph(PyObject *o) {
-  struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *p = (struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *)o;
-  #if CYTHON_USE_TP_FINALIZE
-  if (unlikely(PyType_HasFeature(Py_TYPE(o), Py_TPFLAGS_HAVE_FINALIZE) && Py_TYPE(o)->tp_finalize) && !_PyGC_FINALIZED(o)) {
-    if (PyObject_CallFinalizerFromDealloc(o)) return;
-  }
-  #endif
-  PyObject_GC_UnTrack(o);
-  Py_CLEAR(p->data);
-  (*Py_TYPE(o)->tp_free)(o);
-}
-
-static int __pyx_tp_traverse_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph(PyObject *o, visitproc v, void *a) {
-  int e;
-  struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *p = (struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *)o;
-  if (p->data) {
-    e = (*v)(p->data, a); if (e) return e;
-  }
-  return 0;
-}
-
-static int __pyx_tp_clear_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph(PyObject *o) {
-  PyObject* tmp;
-  struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *p = (struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph *)o;
-  tmp = ((PyObject*)p->data);
-  p->data = ((PyObject*)Py_None); Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  return 0;
-}
-static PyObject *__pyx_sq_item_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph(PyObject *o, Py_ssize_t i) {
-  PyObject *r;
-  PyObject *x = PyInt_FromSsize_t(i); if(!x) return 0;
-  r = Py_TYPE(o)->tp_as_mapping->mp_subscript(o, x);
-  Py_DECREF(x);
-  return r;
-}
-
-static PyObject *__pyx_tp_richcompare_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph(PyObject *o1, PyObject *o2, int op) {
-  switch (op) {
-    case Py_EQ: {
-      return __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_9__eq__(o1, o2);
-    }
-    case Py_NE: {
-      PyObject *ret;
-      ret = __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_9__eq__(o1, o2);
-      if (likely(ret && ret != Py_NotImplemented)) {
-        int b = __Pyx_PyObject_IsTrue(ret); Py_DECREF(ret);
-        if (unlikely(b < 0)) return NULL;
-        ret = (b) ? Py_False : Py_True;
-        Py_INCREF(ret);
-      }
-      return ret;
-    }
-    default: {
-      return __Pyx_NewRef(Py_NotImplemented);
-    }
-  }
-}
-
-static PyObject *__pyx_getprop_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_data(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_4data_1__get__(o);
-}
-
-static PyMethodDef __pyx_methods_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph[] = {
-  {"add", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_3add, METH_O, __pyx_doc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_2add},
-  {"remove", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_5remove, METH_O, __pyx_doc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_4remove},
-  {"set", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_37set, METH_O, __pyx_doc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_36set},
-  {"remove_triples", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_39remove_triples, METH_O, __pyx_doc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_38remove_triples},
-  {"as_rdflib", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_41as_rdflib, METH_NOARGS, __pyx_doc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_40as_rdflib},
-  {"lookup", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_43lookup, METH_VARARGS|METH_KEYWORDS, __pyx_doc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_42lookup},
-  {"terms", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_45terms, METH_O, __pyx_doc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_44terms},
-  {"__reduce_cython__", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_47__reduce_cython__, METH_NOARGS, 0},
-  {"__setstate_cython__", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_49__setstate_cython__, METH_O, 0},
-  {0, 0, 0, 0}
-};
-
-static struct PyGetSetDef __pyx_getsets_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph[] = {
-  {(char *)"data", __pyx_getprop_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_data, 0, (char *)0, 0},
-  {0, 0, 0, 0, 0}
-};
-
-static PyNumberMethods __pyx_tp_as_number_SimpleGraph = {
-  0, /*nb_add*/
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_15__sub__, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3 || (CYTHON_COMPILING_IN_PYPY && PY_VERSION_HEX < 0x03050000)
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_19__and__, /*nb_and*/
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_27__xor__, /*nb_xor*/
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_23__or__, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3 || (CYTHON_COMPILING_IN_PYPY && PY_VERSION_HEX < 0x03050000)
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3 || (CYTHON_COMPILING_IN_PYPY && PY_VERSION_HEX < 0x03050000)
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3 || (CYTHON_COMPILING_IN_PYPY && PY_VERSION_HEX < 0x03050000)
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_17__isub__, /*nb_inplace_subtract*/
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3 || (CYTHON_COMPILING_IN_PYPY && PY_VERSION_HEX < 0x03050000)
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_21__iand__, /*nb_inplace_and*/
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_29__ixor__, /*nb_inplace_xor*/
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_25__ior__, /*nb_inplace_or*/
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  0, /*nb_index*/
-  #if PY_VERSION_HEX >= 0x03050000
-  0, /*nb_matrix_multiply*/
-  #endif
-  #if PY_VERSION_HEX >= 0x03050000
-  0, /*nb_inplace_matrix_multiply*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence_SimpleGraph = {
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_7__len__, /*sq_length*/
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  __pyx_sq_item_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_31__contains__, /*sq_contains*/
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping_SimpleGraph = {
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_7__len__, /*mp_length*/
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_35__getitem__, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyTypeObject __pyx_type_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph = {
-  PyVarObject_HEAD_INIT(0, 0)
-  "lakesuperior.store.ldp_rs.lmdb_triplestore.SimpleGraph", /*tp_name*/
-  sizeof(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph), /*tp_basicsize*/
-  0, /*tp_itemsize*/
-  __pyx_tp_dealloc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph, /*tp_dealloc*/
-  0, /*tp_print*/
-  0, /*tp_getattr*/
-  0, /*tp_setattr*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*tp_compare*/
-  #endif
-  #if PY_MAJOR_VERSION >= 3
-  0, /*tp_as_async*/
-  #endif
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_11__repr__, /*tp_repr*/
-  &__pyx_tp_as_number_SimpleGraph, /*tp_as_number*/
-  &__pyx_tp_as_sequence_SimpleGraph, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping_SimpleGraph, /*tp_as_mapping*/
-  0, /*tp_hash*/
-  0, /*tp_call*/
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_13__str__, /*tp_str*/
-  0, /*tp_getattro*/
-  0, /*tp_setattro*/
-  0, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
-  "\n    Fast and simple implementation of a graph.\n\n    Most functions should mimic RDFLib's graph with less overhead. It uses\n        the same funny but functional slicing notation.\n\n    An instance of this class can be converted to a ``rdflib.Graph`` instance.\n    ", /*tp_doc*/
-  __pyx_tp_traverse_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph, /*tp_traverse*/
-  __pyx_tp_clear_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph, /*tp_clear*/
-  __pyx_tp_richcompare_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph, /*tp_richcompare*/
-  0, /*tp_weaklistoffset*/
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_33__iter__, /*tp_iter*/
-  0, /*tp_iternext*/
-  __pyx_methods_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph, /*tp_methods*/
-  0, /*tp_members*/
-  __pyx_getsets_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph, /*tp_getset*/
-  0, /*tp_base*/
-  0, /*tp_dict*/
-  0, /*tp_descr_get*/
-  0, /*tp_descr_set*/
-  0, /*tp_dictoffset*/
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_1__init__, /*tp_init*/
-  0, /*tp_alloc*/
-  __pyx_tp_new_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph, /*tp_new*/
-  0, /*tp_free*/
-  0, /*tp_is_gc*/
-  0, /*tp_bases*/
-  0, /*tp_mro*/
-  0, /*tp_cache*/
-  0, /*tp_subclasses*/
-  0, /*tp_weaklist*/
-  0, /*tp_del*/
-  0, /*tp_version_tag*/
-  #if PY_VERSION_HEX >= 0x030400a1
-  0, /*tp_finalize*/
-  #endif
-};
-static struct __pyx_vtabstruct_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr __pyx_vtable_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr;
-
-static PyObject *__pyx_tp_new_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr(PyTypeObject *t, PyObject *a, PyObject *k) {
-  struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr *p;
-  PyObject *o = __pyx_tp_new_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph(t, a, k);
-  if (unlikely(!o)) return 0;
-  p = ((struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr *)o);
-  p->__pyx_base.__pyx_vtab = (struct __pyx_vtabstruct_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph*)__pyx_vtabptr_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr;
-  p->uri = Py_None; Py_INCREF(Py_None);
-  return o;
-}
-
-static void __pyx_tp_dealloc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr(PyObject *o) {
-  struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr *p = (struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr *)o;
-  #if CYTHON_USE_TP_FINALIZE
-  if (unlikely(PyType_HasFeature(Py_TYPE(o), Py_TPFLAGS_HAVE_FINALIZE) && Py_TYPE(o)->tp_finalize) && !_PyGC_FINALIZED(o)) {
-    if (PyObject_CallFinalizerFromDealloc(o)) return;
-  }
-  #endif
-  PyObject_GC_UnTrack(o);
-  Py_CLEAR(p->uri);
-  PyObject_GC_Track(o);
-  __pyx_tp_dealloc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph(o);
-}
-
-static int __pyx_tp_traverse_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr(PyObject *o, visitproc v, void *a) {
-  int e;
-  struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr *p = (struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr *)o;
-  e = __pyx_tp_traverse_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph(o, v, a); if (e) return e;
-  if (p->uri) {
-    e = (*v)(p->uri, a); if (e) return e;
-  }
-  return 0;
-}
-
-static int __pyx_tp_clear_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr(PyObject *o) {
-  PyObject* tmp;
-  struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr *p = (struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr *)o;
-  __pyx_tp_clear_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_SimpleGraph(o);
-  tmp = ((PyObject*)p->uri);
-  p->uri = Py_None; Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  return 0;
-}
-static PyObject *__pyx_sq_item_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr(PyObject *o, Py_ssize_t i) {
-  PyObject *r;
-  PyObject *x = PyInt_FromSsize_t(i); if(!x) return 0;
-  r = Py_TYPE(o)->tp_as_mapping->mp_subscript(o, x);
-  Py_DECREF(x);
-  return r;
-}
-
-static PyObject *__pyx_getprop_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_identifier(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_10identifier_1__get__(o);
-}
-
-static PyObject *__pyx_getprop_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_graph(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_5graph_1__get__(o);
-}
-
-static PyObject *__pyx_getprop_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_uri(PyObject *o, CYTHON_UNUSED void *x) {
-  return __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_3uri_1__get__(o);
-}
-
-static PyMethodDef __pyx_methods_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr[] = {
-  {"value", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_15value, METH_VARARGS|METH_KEYWORDS, __pyx_doc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_14value},
-  {"as_rdflib", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_17as_rdflib, METH_NOARGS, __pyx_doc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_16as_rdflib},
-  {"__reduce_cython__", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_19__reduce_cython__, METH_NOARGS, 0},
-  {"__setstate_cython__", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_21__setstate_cython__, METH_O, 0},
-  {0, 0, 0, 0}
-};
-
-static struct PyGetSetDef __pyx_getsets_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr[] = {
-  {(char *)"identifier", __pyx_getprop_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_identifier, 0, (char *)"\n        IMR URI. For compatibility with RDFLib Resource.\n\n        :rtype: string\n        ", 0},
-  {(char *)"graph", __pyx_getprop_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_graph, 0, (char *)"\n        Return a SimpleGraph with the same data.\n\n        :rtype: SimpleGraph\n        ", 0},
-  {(char *)"uri", __pyx_getprop_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_uri, 0, (char *)0, 0},
-  {0, 0, 0, 0, 0}
-};
-
-static PyNumberMethods __pyx_tp_as_number_Imr = {
-  0, /*nb_add*/
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_5__sub__, /*nb_subtract*/
-  0, /*nb_multiply*/
-  #if PY_MAJOR_VERSION < 3 || (CYTHON_COMPILING_IN_PYPY && PY_VERSION_HEX < 0x03050000)
-  0, /*nb_divide*/
-  #endif
-  0, /*nb_remainder*/
-  0, /*nb_divmod*/
-  0, /*nb_power*/
-  0, /*nb_negative*/
-  0, /*nb_positive*/
-  0, /*nb_absolute*/
-  0, /*nb_nonzero*/
-  0, /*nb_invert*/
-  0, /*nb_lshift*/
-  0, /*nb_rshift*/
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_7__and__, /*nb_and*/
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_11__xor__, /*nb_xor*/
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_9__or__, /*nb_or*/
-  #if PY_MAJOR_VERSION < 3 || (CYTHON_COMPILING_IN_PYPY && PY_VERSION_HEX < 0x03050000)
-  0, /*nb_coerce*/
-  #endif
-  0, /*nb_int*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*nb_long*/
-  #else
-  0, /*reserved*/
-  #endif
-  0, /*nb_float*/
-  #if PY_MAJOR_VERSION < 3 || (CYTHON_COMPILING_IN_PYPY && PY_VERSION_HEX < 0x03050000)
-  0, /*nb_oct*/
-  #endif
-  #if PY_MAJOR_VERSION < 3 || (CYTHON_COMPILING_IN_PYPY && PY_VERSION_HEX < 0x03050000)
-  0, /*nb_hex*/
-  #endif
-  0, /*nb_inplace_add*/
-  #if CYTHON_COMPILING_IN_PYPY
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_17__isub__, /*nb_inplace_subtract*/
-  #else
-  0, /*nb_inplace_subtract*/
-  #endif
-  0, /*nb_inplace_multiply*/
-  #if PY_MAJOR_VERSION < 3 || (CYTHON_COMPILING_IN_PYPY && PY_VERSION_HEX < 0x03050000)
-  0, /*nb_inplace_divide*/
-  #endif
-  0, /*nb_inplace_remainder*/
-  0, /*nb_inplace_power*/
-  0, /*nb_inplace_lshift*/
-  0, /*nb_inplace_rshift*/
-  #if CYTHON_COMPILING_IN_PYPY
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_21__iand__, /*nb_inplace_and*/
-  #else
-  0, /*nb_inplace_and*/
-  #endif
-  #if CYTHON_COMPILING_IN_PYPY
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_29__ixor__, /*nb_inplace_xor*/
-  #else
-  0, /*nb_inplace_xor*/
-  #endif
-  #if CYTHON_COMPILING_IN_PYPY
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_25__ior__, /*nb_inplace_or*/
-  #else
-  0, /*nb_inplace_or*/
-  #endif
-  0, /*nb_floor_divide*/
-  0, /*nb_true_divide*/
-  0, /*nb_inplace_floor_divide*/
-  0, /*nb_inplace_true_divide*/
-  0, /*nb_index*/
-  #if PY_VERSION_HEX >= 0x03050000
-  0, /*nb_matrix_multiply*/
-  #endif
-  #if PY_VERSION_HEX >= 0x03050000
-  0, /*nb_inplace_matrix_multiply*/
-  #endif
-};
-
-static PySequenceMethods __pyx_tp_as_sequence_Imr = {
-  #if CYTHON_COMPILING_IN_PYPY
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_7__len__, /*sq_length*/
-  #else
-  0, /*sq_length*/
-  #endif
-  0, /*sq_concat*/
-  0, /*sq_repeat*/
-  __pyx_sq_item_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr, /*sq_item*/
-  0, /*sq_slice*/
-  0, /*sq_ass_item*/
-  0, /*sq_ass_slice*/
-  #if CYTHON_COMPILING_IN_PYPY
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_31__contains__, /*sq_contains*/
-  #else
-  0, /*sq_contains*/
-  #endif
-  0, /*sq_inplace_concat*/
-  0, /*sq_inplace_repeat*/
-};
-
-static PyMappingMethods __pyx_tp_as_mapping_Imr = {
-  #if CYTHON_COMPILING_IN_PYPY
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_7__len__, /*mp_length*/
-  #else
-  0, /*mp_length*/
-  #endif
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_13__getitem__, /*mp_subscript*/
-  0, /*mp_ass_subscript*/
-};
-
-static PyTypeObject __pyx_type_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr = {
-  PyVarObject_HEAD_INIT(0, 0)
-  "lakesuperior.store.ldp_rs.lmdb_triplestore.Imr", /*tp_name*/
-  sizeof(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr), /*tp_basicsize*/
-  0, /*tp_itemsize*/
-  __pyx_tp_dealloc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr, /*tp_dealloc*/
-  0, /*tp_print*/
-  0, /*tp_getattr*/
-  0, /*tp_setattr*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*tp_compare*/
-  #endif
-  #if PY_MAJOR_VERSION >= 3
-  0, /*tp_as_async*/
-  #endif
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_3__repr__, /*tp_repr*/
-  &__pyx_tp_as_number_Imr, /*tp_as_number*/
-  &__pyx_tp_as_sequence_Imr, /*tp_as_sequence*/
-  &__pyx_tp_as_mapping_Imr, /*tp_as_mapping*/
-  0, /*tp_hash*/
-  0, /*tp_call*/
-  #if CYTHON_COMPILING_IN_PYPY
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_13__str__, /*tp_str*/
-  #else
-  0, /*tp_str*/
-  #endif
-  0, /*tp_getattro*/
-  0, /*tp_setattro*/
-  0, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
-  "\n    In-memory resource data container.\n\n    This is an extension of :py:class:`~SimpleGraph` that adds a subject URI to\n    the data set and some convenience methods.\n\n    An instance of this class can be converted to a ``rdflib.Resource``\n    instance.\n\n    Some set operations that produce a new object (``-``, ``|``, ``&``, ``^``)\n    will create a new ``Imr`` instance with the same subject URI.\n    ", /*tp_doc*/
-  __pyx_tp_traverse_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr, /*tp_traverse*/
-  __pyx_tp_clear_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr, /*tp_clear*/
-  0, /*tp_richcompare*/
-  0, /*tp_weaklistoffset*/
-  #if CYTHON_COMPILING_IN_PYPY
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_11SimpleGraph_33__iter__, /*tp_iter*/
-  #else
-  0, /*tp_iter*/
-  #endif
-  0, /*tp_iternext*/
-  __pyx_methods_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr, /*tp_methods*/
-  0, /*tp_members*/
-  __pyx_getsets_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr, /*tp_getset*/
-  0, /*tp_base*/
-  0, /*tp_dict*/
-  0, /*tp_descr_get*/
-  0, /*tp_descr_set*/
-  0, /*tp_dictoffset*/
-  __pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_3Imr_1__init__, /*tp_init*/
-  0, /*tp_alloc*/
-  __pyx_tp_new_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_Imr, /*tp_new*/
-  0, /*tp_free*/
-  0, /*tp_is_gc*/
-  0, /*tp_bases*/
-  0, /*tp_mro*/
-  0, /*tp_cache*/
-  0, /*tp_subclasses*/
-  0, /*tp_weaklist*/
-  0, /*tp_del*/
-  0, /*tp_version_tag*/
-  #if PY_VERSION_HEX >= 0x030400a1
-  0, /*tp_finalize*/
-  #endif
-};
-static struct __pyx_vtabstruct_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore __pyx_vtable_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore;
-
-static PyObject *__pyx_tp_new_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore(PyTypeObject *t, PyObject *a, PyObject *k) {
-  struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *p;
-  PyObject *o = __pyx_ptype_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore->tp_new(t, a, k);
-  if (unlikely(!o)) return 0;
-  p = ((struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore *)o);
-  p->__pyx_base.__pyx_vtab = (struct __pyx_vtabstruct_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore*)__pyx_vtabptr_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore;
-  return o;
-}
-
-static void __pyx_tp_dealloc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore(PyObject *o) {
-  #if CYTHON_USE_TP_FINALIZE
-  if (unlikely(PyType_HasFeature(Py_TYPE(o), Py_TPFLAGS_HAVE_FINALIZE) && Py_TYPE(o)->tp_finalize) && (!PyType_IS_GC(Py_TYPE(o)) || !_PyGC_FINALIZED(o))) {
-    if (PyObject_CallFinalizerFromDealloc(o)) return;
-  }
-  #endif
-  if (likely(__pyx_ptype_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore)) __pyx_ptype_12lakesuperior_5store_15base_lmdb_store_BaseLmdbStore->tp_dealloc(o); else __Pyx_call_next_tp_dealloc(o, __pyx_tp_dealloc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore);
-}
-
-static PyMethodDef __pyx_methods_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore[] = {
-  {"stats", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_1stats, METH_NOARGS, __pyx_doc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_stats},
-  {"_len", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_3_len, METH_VARARGS|METH_KEYWORDS, __pyx_doc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_2_len},
-  {"add", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_5add, METH_VARARGS|METH_KEYWORDS, __pyx_doc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_4add},
-  {"add_graph", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_7add_graph, METH_O, __pyx_doc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_6add_graph},
-  {"_add_graph", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_9_add_graph, METH_VARARGS|METH_KEYWORDS, __pyx_doc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_8_add_graph},
-  {"_remove", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_11_remove, METH_VARARGS|METH_KEYWORDS, 0},
-  {"_remove_graph", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_13_remove_graph, METH_O, __pyx_doc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_12_remove_graph},
-  {"contexts", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_15contexts, METH_VARARGS|METH_KEYWORDS, __pyx_doc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_14contexts},
-  {"triples", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_18triples, METH_VARARGS|METH_KEYWORDS, __pyx_doc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_17triples},
-  {"triple_keys", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_21triple_keys, METH_VARARGS|METH_KEYWORDS, __pyx_doc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_20triple_keys},
-  {"_all_term_keys", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_23_all_term_keys, METH_O, __pyx_doc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_22_all_term_keys},
-  {"all_terms", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_25all_terms, METH_O, __pyx_doc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_24all_terms},
-  {"all_namespaces", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_28all_namespaces, METH_NOARGS, __pyx_doc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_27all_namespaces},
-  {"all_contexts", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_30all_contexts, METH_VARARGS|METH_KEYWORDS, __pyx_doc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_29all_contexts},
-  {"__reduce_cython__", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_32__reduce_cython__, METH_NOARGS, 0},
-  {"__setstate_cython__", (PyCFunction)__pyx_pw_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_15LmdbTriplestore_34__setstate_cython__, METH_O, 0},
-  {0, 0, 0, 0}
-};
-
-static PyTypeObject __pyx_type_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore = {
-  PyVarObject_HEAD_INIT(0, 0)
-  "lakesuperior.store.ldp_rs.lmdb_triplestore.LmdbTriplestore", /*tp_name*/
-  sizeof(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore), /*tp_basicsize*/
-  0, /*tp_itemsize*/
-  __pyx_tp_dealloc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore, /*tp_dealloc*/
-  0, /*tp_print*/
-  0, /*tp_getattr*/
-  0, /*tp_setattr*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*tp_compare*/
-  #endif
-  #if PY_MAJOR_VERSION >= 3
-  0, /*tp_as_async*/
-  #endif
-  0, /*tp_repr*/
-  0, /*tp_as_number*/
-  0, /*tp_as_sequence*/
-  0, /*tp_as_mapping*/
-  0, /*tp_hash*/
-  0, /*tp_call*/
-  0, /*tp_str*/
-  0, /*tp_getattro*/
-  0, /*tp_setattro*/
-  0, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_BASETYPE, /*tp_flags*/
-  "\n    Low-level storage layer.\n\n    This class extends the RDFLib-compatible :py:class:`BaseLmdbStore` and maps\n    triples and contexts to key-value records in LMDB.\n\n    This class uses the original LMDB C API rather than the Python bindings,\n    because several data manipulations happen after retrieval from the store,\n    which are more efficiently performed at the C level.\n    ", /*tp_doc*/
-  0, /*tp_traverse*/
-  0, /*tp_clear*/
-  0, /*tp_richcompare*/
-  0, /*tp_weaklistoffset*/
-  0, /*tp_iter*/
-  0, /*tp_iternext*/
-  __pyx_methods_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore, /*tp_methods*/
-  0, /*tp_members*/
-  0, /*tp_getset*/
-  0, /*tp_base*/
-  0, /*tp_dict*/
-  0, /*tp_descr_get*/
-  0, /*tp_descr_set*/
-  0, /*tp_dictoffset*/
-  0, /*tp_init*/
-  0, /*tp_alloc*/
-  __pyx_tp_new_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_LmdbTriplestore, /*tp_new*/
-  0, /*tp_free*/
-  0, /*tp_is_gc*/
-  0, /*tp_bases*/
-  0, /*tp_mro*/
-  0, /*tp_cache*/
-  0, /*tp_subclasses*/
-  0, /*tp_weaklist*/
-  0, /*tp_del*/
-  0, /*tp_version_tag*/
-  #if PY_VERSION_HEX >= 0x030400a1
-  0, /*tp_finalize*/
-  #endif
-};
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-static struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple *__pyx_freelist_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple[8];
-static int __pyx_freecount_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple = 0;
-
-static PyObject *__pyx_tp_new_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  PyObject *o;
-  if (CYTHON_COMPILING_IN_CPYTHON && likely((__pyx_freecount_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple)))) {
-    o = (PyObject*)__pyx_freelist_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple[--__pyx_freecount_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple];
-    memset(o, 0, sizeof(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple));
-    (void) PyObject_INIT(o, t);
-    PyObject_GC_Track(o);
-  } else {
-    o = (*t->tp_alloc)(t, 0);
-    if (unlikely(!o)) return 0;
-  }
-  return o;
-}
-
-static void __pyx_tp_dealloc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple(PyObject *o) {
-  struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple *p = (struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple *)o;
-  PyObject_GC_UnTrack(o);
-  Py_CLEAR(p->__pyx_v_self);
-  if (CYTHON_COMPILING_IN_CPYTHON && ((__pyx_freecount_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple)))) {
-    __pyx_freelist_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple[__pyx_freecount_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple++] = ((struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple *)o);
-  } else {
-    (*Py_TYPE(o)->tp_free)(o);
-  }
-}
-
-static int __pyx_tp_traverse_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple(PyObject *o, visitproc v, void *a) {
-  int e;
-  struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple *p = (struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple *)o;
-  if (p->__pyx_v_self) {
-    e = (*v)(((PyObject *)p->__pyx_v_self), a); if (e) return e;
-  }
-  return 0;
-}
-
-static int __pyx_tp_clear_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple(PyObject *o) {
-  PyObject* tmp;
-  struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple *p = (struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple *)o;
-  tmp = ((PyObject*)p->__pyx_v_self);
-  p->__pyx_v_self = ((struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore_ResultSet *)Py_None); Py_INCREF(Py_None);
-  Py_XDECREF(tmp);
-  return 0;
-}
-
-static PyTypeObject __pyx_type_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple = {
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-  sizeof(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple), /*tp_basicsize*/
-  0, /*tp_itemsize*/
-  __pyx_tp_dealloc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple, /*tp_dealloc*/
-  0, /*tp_print*/
-  0, /*tp_getattr*/
-  0, /*tp_setattr*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*tp_compare*/
-  #endif
-  #if PY_MAJOR_VERSION >= 3
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-  0, /*tp_setattro*/
-  0, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
-  0, /*tp_doc*/
-  __pyx_tp_traverse_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple, /*tp_traverse*/
-  __pyx_tp_clear_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple, /*tp_clear*/
-  0, /*tp_richcompare*/
-  0, /*tp_weaklistoffset*/
-  0, /*tp_iter*/
-  0, /*tp_iternext*/
-  0, /*tp_methods*/
-  0, /*tp_members*/
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-  0, /*tp_alloc*/
-  __pyx_tp_new_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct__to_tuple, /*tp_new*/
-  0, /*tp_free*/
-  0, /*tp_is_gc*/
-  0, /*tp_bases*/
-  0, /*tp_mro*/
-  0, /*tp_cache*/
-  0, /*tp_subclasses*/
-  0, /*tp_weaklist*/
-  0, /*tp_del*/
-  0, /*tp_version_tag*/
-  #if PY_VERSION_HEX >= 0x030400a1
-  0, /*tp_finalize*/
-  #endif
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-
-static struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr *__pyx_freelist_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr[8];
-static int __pyx_freecount_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr = 0;
-
-static PyObject *__pyx_tp_new_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  PyObject *o;
-  if (CYTHON_COMPILING_IN_CPYTHON && likely((__pyx_freecount_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr)))) {
-    o = (PyObject*)__pyx_freelist_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr[--__pyx_freecount_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr];
-    memset(o, 0, sizeof(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr));
-    (void) PyObject_INIT(o, t);
-    PyObject_GC_Track(o);
-  } else {
-    o = (*t->tp_alloc)(t, 0);
-    if (unlikely(!o)) return 0;
-  }
-  return o;
-}
-
-static void __pyx_tp_dealloc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr(PyObject *o) {
-  struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr *p = (struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr *)o;
-  PyObject_GC_UnTrack(o);
-  Py_CLEAR(p->__pyx_outer_scope);
-  Py_CLEAR(p->__pyx_v_i);
-  Py_CLEAR(p->__pyx_t_0);
-  if (CYTHON_COMPILING_IN_CPYTHON && ((__pyx_freecount_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr)))) {
-    __pyx_freelist_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr[__pyx_freecount_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr++] = ((struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr *)o);
-  } else {
-    (*Py_TYPE(o)->tp_free)(o);
-  }
-}
-
-static int __pyx_tp_traverse_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr(PyObject *o, visitproc v, void *a) {
-  int e;
-  struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr *p = (struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr *)o;
-  if (p->__pyx_outer_scope) {
-    e = (*v)(((PyObject *)p->__pyx_outer_scope), a); if (e) return e;
-  }
-  if (p->__pyx_v_i) {
-    e = (*v)(p->__pyx_v_i, a); if (e) return e;
-  }
-  if (p->__pyx_t_0) {
-    e = (*v)(p->__pyx_t_0, a); if (e) return e;
-  }
-  return 0;
-}
-
-static PyTypeObject __pyx_type_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr = {
-  PyVarObject_HEAD_INIT(0, 0)
-  "lakesuperior.store.ldp_rs.lmdb_triplestore.__pyx_scope_struct_1_genexpr", /*tp_name*/
-  sizeof(struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr), /*tp_basicsize*/
-  0, /*tp_itemsize*/
-  __pyx_tp_dealloc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr, /*tp_dealloc*/
-  0, /*tp_print*/
-  0, /*tp_getattr*/
-  0, /*tp_setattr*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*tp_compare*/
-  #endif
-  #if PY_MAJOR_VERSION >= 3
-  0, /*tp_as_async*/
-  #endif
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-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
-  0, /*tp_doc*/
-  __pyx_tp_traverse_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr, /*tp_traverse*/
-  0, /*tp_clear*/
-  0, /*tp_richcompare*/
-  0, /*tp_weaklistoffset*/
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-  __pyx_tp_new_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_1_genexpr, /*tp_new*/
-  0, /*tp_free*/
-  0, /*tp_is_gc*/
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-  0, /*tp_mro*/
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-  0, /*tp_del*/
-  0, /*tp_version_tag*/
-  #if PY_VERSION_HEX >= 0x030400a1
-  0, /*tp_finalize*/
-  #endif
-};
-
-static struct __pyx_obj_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_2_contexts *__pyx_freelist_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_2_contexts[8];
-static int __pyx_freecount_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_2_contexts = 0;
-
-static PyObject *__pyx_tp_new_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_2_contexts(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  PyObject *o;
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-static PyObject *__pyx_tp_new_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_3_triples(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
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-    (void) PyObject_INIT(o, t);
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-static int __pyx_tp_traverse_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_3_triples(PyObject *o, visitproc v, void *a) {
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-static PyObject *__pyx_tp_new_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_4_all_terms(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
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-static void __pyx_tp_dealloc_12lakesuperior_5store_6ldp_rs_16lmdb_triplestore___pyx_scope_struct_4_all_terms(PyObject *o) {
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-  {&__pyx_n_s_DATASET_DEFAULT_GRAPH_ID, __pyx_k_DATASET_DEFAULT_GRAPH_ID, sizeof(__pyx_k_DATASET_DEFAULT_GRAPH_ID), 0, 0, 1, 1},
-  {&__pyx_kp_u_DBI, __pyx_k_DBI, sizeof(__pyx_k_DBI), 0, 1, 0, 0},
-  {&__pyx_kp_u_DB_label, __pyx_k_DB_label, sizeof(__pyx_k_DB_label), 0, 1, 0, 0},
-  {&__pyx_kp_u_Database_label, __pyx_k_Database_label, sizeof(__pyx_k_Database_label), 0, 1, 0, 0},
-  {&__pyx_kp_u_Double_key, __pyx_k_Double_key, sizeof(__pyx_k_Double_key), 0, 1, 0, 0},
-  {&__pyx_kp_u_Entries_for, __pyx_k_Entries_for, sizeof(__pyx_k_Entries_for), 0, 1, 0, 0},
-  {&__pyx_kp_u_Entries_in_c_spo, __pyx_k_Entries_in_c_spo, sizeof(__pyx_k_Entries_in_c_spo), 0, 1, 0, 0},
-  {&__pyx_kp_u_Error_gathering_DB_stats, __pyx_k_Error_gathering_DB_stats, sizeof(__pyx_k_Error_gathering_DB_stats), 0, 1, 0, 0},
-  {&__pyx_kp_u_Error_getting_data_for_key, __pyx_k_Error_getting_data_for_key, sizeof(__pyx_k_Error_getting_data_for_key), 0, 1, 0, 0},
-  {&__pyx_kp_u_Error_setting_key, __pyx_k_Error_setting_key, sizeof(__pyx_k_Error_setting_key), 0, 1, 0, 0},
-  {&__pyx_kp_u_Getting_all_DB_triples, __pyx_k_Getting_all_DB_triples, sizeof(__pyx_k_Getting_all_DB_triples), 0, 1, 0, 0},
-  {&__pyx_kp_u_Getting_triples_for, __pyx_k_Getting_triples_for, sizeof(__pyx_k_Getting_triples_for), 0, 1, 0, 0},
-  {&__pyx_kp_u_Got_data_in_2bound, __pyx_k_Got_data_in_2bound, sizeof(__pyx_k_Got_data_in_2bound), 0, 1, 0, 0},
-  {&__pyx_n_s_Graph, __pyx_k_Graph, sizeof(__pyx_k_Graph), 0, 0, 1, 1},
-  {&__pyx_kp_s_Incompatible_checksums_s_vs_0x8d, __pyx_k_Incompatible_checksums_s_vs_0x8d, sizeof(__pyx_k_Incompatible_checksums_s_vs_0x8d), 0, 0, 1, 0},
-  {&__pyx_kp_s_Incompatible_checksums_s_vs_0xbf, __pyx_k_Incompatible_checksums_s_vs_0xbf, sizeof(__pyx_k_Incompatible_checksums_s_vs_0xbf), 0, 0, 1, 0},
-  {&__pyx_kp_u_Index_operation_is_not_supported, __pyx_k_Index_operation_is_not_supported, sizeof(__pyx_k_Index_operation_is_not_supported), 0, 1, 0, 0},
-  {&__pyx_kp_u_Indices_and_not_found_in_LU_keys, __pyx_k_Indices_and_not_found_in_LU_keys, sizeof(__pyx_k_Indices_and_not_found_in_LU_keys), 0, 1, 0, 0},
-  {&__pyx_kp_u_Invalid_triple, __pyx_k_Invalid_triple, sizeof(__pyx_k_Invalid_triple), 0, 1, 0, 0},
-  {&__pyx_kp_u_Key, __pyx_k_Key, sizeof(__pyx_k_Key), 0, 1, 0, 0},
-  {&__pyx_n_s_KeyExistsError, __pyx_k_KeyExistsError, sizeof(__pyx_k_KeyExistsError), 0, 0, 1, 1},
-  {&__pyx_n_s_KeyNotFoundError, __pyx_k_KeyNotFoundError, sizeof(__pyx_k_KeyNotFoundError), 0, 0, 1, 1},
-  {&__pyx_kp_u_LUK_offsets, __pyx_k_LUK_offsets, sizeof(__pyx_k_LUK_offsets), 0, 1, 0, 0},
-  {&__pyx_n_s_LmdbError, __pyx_k_LmdbError, sizeof(__pyx_k_LmdbError), 0, 0, 1, 1},
-  {&__pyx_n_s_LmdbTriplestore_all_terms, __pyx_k_LmdbTriplestore_all_terms, sizeof(__pyx_k_LmdbTriplestore_all_terms), 0, 0, 1, 1},
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-  {&__pyx_n_s_LmdbTriplestore_triples, __pyx_k_LmdbTriplestore_triples, sizeof(__pyx_k_LmdbTriplestore_triples), 0, 0, 1, 1},
-  {&__pyx_kp_u_Looking_in_key, __pyx_k_Looking_in_key, sizeof(__pyx_k_Looking_in_key), 0, 1, 0, 0},
-  {&__pyx_kp_u_Looking_up_in_graph, __pyx_k_Looking_up_in_graph, sizeof(__pyx_k_Looking_up_in_graph), 0, 1, 0, 0},
-  {&__pyx_kp_u_Lookup_key, __pyx_k_Lookup_key, sizeof(__pyx_k_Lookup_key), 0, 1, 0, 0},
-  {&__pyx_n_s_MemoryError, __pyx_k_MemoryError, sizeof(__pyx_k_MemoryError), 0, 0, 1, 1},
-  {&__pyx_kp_u_More_than_one_value_found_for, __pyx_k_More_than_one_value_found_for, sizeof(__pyx_k_More_than_one_value_found_for), 0, 1, 0, 0},
-  {&__pyx_n_s_Node, __pyx_k_Node, sizeof(__pyx_k_Node), 0, 0, 1, 1},
-  {&__pyx_kp_u_Not_found_in_index, __pyx_k_Not_found_in_index, sizeof(__pyx_k_Not_found_in_index), 0, 1, 0, 0},
-  {&__pyx_kp_u_Page_size, __pyx_k_Page_size, sizeof(__pyx_k_Page_size), 0, 1, 0, 0},
-  {&__pyx_n_s_PickleError, __pyx_k_PickleError, sizeof(__pyx_k_PickleError), 0, 0, 1, 1},
-  {&__pyx_n_s_RDFLIB_DEFAULT_GRAPH_URI, __pyx_k_RDFLIB_DEFAULT_GRAPH_URI, sizeof(__pyx_k_RDFLIB_DEFAULT_GRAPH_URI), 0, 0, 1, 1},
-  {&__pyx_kp_u_Remove, __pyx_k_Remove, sizeof(__pyx_k_Remove), 0, 1, 0, 0},
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-  {&__pyx_kp_u_Removing, __pyx_k_Removing, sizeof(__pyx_k_Removing), 0, 1, 0, 0},
-  {&__pyx_kp_u_Removing_from_graph, __pyx_k_Removing_from_graph, sizeof(__pyx_k_Removing_from_graph), 0, 1, 0, 0},
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-  {&__pyx_kp_u_Term_order, __pyx_k_Term_order, sizeof(__pyx_k_Term_order), 0, 1, 0, 0},
-  {&__pyx_kp_u_Triples_found, __pyx_k_Triples_found, sizeof(__pyx_k_Triples_found), 0, 1, 0, 0},
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-  {&__pyx_kp_u_Wrong_slice_format, __pyx_k_Wrong_slice_format, sizeof(__pyx_k_Wrong_slice_format), 0, 1, 0, 0},
-  {&__pyx_kp_u__10, __pyx_k__10, sizeof(__pyx_k__10), 0, 1, 0, 0},
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-  {&__pyx_kp_u__12, __pyx_k__12, sizeof(__pyx_k__12), 0, 1, 0, 0},
-  {&__pyx_kp_u__27, __pyx_k__27, sizeof(__pyx_k__27), 0, 1, 0, 0},
-  {&__pyx_kp_u__8, __pyx_k__8, sizeof(__pyx_k__8), 0, 1, 0, 0},
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-  {&__pyx_n_s_add, __pyx_k_add, sizeof(__pyx_k_add), 0, 0, 1, 1},
-  {&__pyx_n_s_add_graph, __pyx_k_add_graph, sizeof(__pyx_k_add_graph), 0, 0, 1, 1},
-  {&__pyx_n_s_add_graph_2, __pyx_k_add_graph_2, sizeof(__pyx_k_add_graph_2), 0, 0, 1, 1},
-  {&__pyx_n_s_all, __pyx_k_all, sizeof(__pyx_k_all), 0, 0, 1, 1},
-  {&__pyx_n_s_all_contexts, __pyx_k_all_contexts, sizeof(__pyx_k_all_contexts), 0, 0, 1, 1},
-  {&__pyx_n_s_all_namespaces, __pyx_k_all_namespaces, sizeof(__pyx_k_all_namespaces), 0, 0, 1, 1},
-  {&__pyx_n_s_all_term_keys, __pyx_k_all_term_keys, sizeof(__pyx_k_all_term_keys), 0, 0, 1, 1},
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-  {&__pyx_kp_u_and_term, __pyx_k_and_term, sizeof(__pyx_k_and_term), 0, 1, 0, 0},
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-  {&__pyx_kp_u_at_position, __pyx_k_at_position, sizeof(__pyx_k_at_position), 0, 1, 0, 0},
-  {&__pyx_kp_u_bytes, __pyx_k_bytes, sizeof(__pyx_k_bytes), 0, 1, 0, 0},
-  {&__pyx_kp_u_bytes_of_data, __pyx_k_bytes_of_data, sizeof(__pyx_k_bytes_of_data), 0, 1, 0, 0},
-  {&__pyx_kp_u_c, __pyx_k_c, sizeof(__pyx_k_c), 0, 1, 0, 0},
-  {&__pyx_kp_u_c_spo, __pyx_k_c_spo, sizeof(__pyx_k_c_spo), 0, 1, 0, 0},
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-  {&__pyx_n_s_cline_in_traceback, __pyx_k_cline_in_traceback, sizeof(__pyx_k_cline_in_traceback), 0, 0, 1, 1},
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-  {&__pyx_n_s_enumerate, __pyx_k_enumerate, sizeof(__pyx_k_enumerate), 0, 0, 1, 1},
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-  {&__pyx_n_s_flags, __pyx_k_flags, sizeof(__pyx_k_flags), 0, 0, 1, 1},
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-  {&__pyx_kp_u_from_indices, __pyx_k_from_indices, sizeof(__pyx_k_from_indices), 0, 1, 0, 0},
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-  {&__pyx_kp_u_length, __pyx_k_length, sizeof(__pyx_k_length), 0, 1, 0, 0},
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-  {&__pyx_kp_u_lookup_1bound, __pyx_k_lookup_1bound, sizeof(__pyx_k_lookup_1bound), 0, 1, 0, 0},
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-  {&__pyx_kp_u_luk1, __pyx_k_luk1, sizeof(__pyx_k_luk1), 0, 1, 0, 0},
-  {&__pyx_kp_u_luk2, __pyx_k_luk2, sizeof(__pyx_k_luk2), 0, 1, 0, 0},
-  {&__pyx_n_s_main, __pyx_k_main, sizeof(__pyx_k_main), 0, 0, 1, 1},
-  {&__pyx_n_u_map_size, __pyx_k_map_size, sizeof(__pyx_k_map_size), 0, 1, 0, 1},
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-  {&__pyx_kp_u_po_s, __pyx_k_po_s, sizeof(__pyx_k_po_s), 0, 1, 0, 0},
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-  {&__pyx_n_s_pyx_unpickle_SimpleGraph, __pyx_k_pyx_unpickle_SimpleGraph, sizeof(__pyx_k_pyx_unpickle_SimpleGraph), 0, 0, 1, 1},
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-    tmp_value = tstate->curexc_value;
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-    tstate->curexc_type = type;
-    tstate->curexc_value = value;
-    tstate->curexc_traceback = tb;
-    Py_XDECREF(tmp_type);
-    Py_XDECREF(tmp_value);
-    Py_XDECREF(tmp_tb);
-}
-static CYTHON_INLINE void __Pyx_ErrFetchInState(PyThreadState *tstate, PyObject **type, PyObject **value, PyObject **tb) {
-    *type = tstate->curexc_type;
-    *value = tstate->curexc_value;
-    *tb = tstate->curexc_traceback;
-    tstate->curexc_type = 0;
-    tstate->curexc_value = 0;
-    tstate->curexc_traceback = 0;
-}
-#endif
-
-/* Profile */
-#if CYTHON_PROFILE
-static int __Pyx_TraceSetupAndCall(PyCodeObject** code,
-                                   PyFrameObject** frame,
-                                   PyThreadState* tstate,
-                                   const char *funcname,
-                                   const char *srcfile,
-                                   int firstlineno) {
-    PyObject *type, *value, *traceback;
-    int retval;
-    if (*frame == NULL || !CYTHON_PROFILE_REUSE_FRAME) {
-        if (*code == NULL) {
-            *code = __Pyx_createFrameCodeObject(funcname, srcfile, firstlineno);
-            if (*code == NULL) return 0;
-        }
-        *frame = PyFrame_New(
-            tstate,                          /*PyThreadState *tstate*/
-            *code,                           /*PyCodeObject *code*/
-            __pyx_d,                  /*PyObject *globals*/
-            0                                /*PyObject *locals*/
-        );
-        if (*frame == NULL) return 0;
-        if (CYTHON_TRACE && (*frame)->f_trace == NULL) {
-            Py_INCREF(Py_None);
-            (*frame)->f_trace = Py_None;
-        }
-#if PY_VERSION_HEX < 0x030400B1
-    } else {
-        (*frame)->f_tstate = tstate;
-#endif
-    }
-      __Pyx_PyFrame_SetLineNumber(*frame, firstlineno);
-    retval = 1;
-    tstate->tracing++;
-    tstate->use_tracing = 0;
-    __Pyx_ErrFetchInState(tstate, &type, &value, &traceback);
-    #if CYTHON_TRACE
-    if (tstate->c_tracefunc)
-        retval = tstate->c_tracefunc(tstate->c_traceobj, *frame, PyTrace_CALL, NULL) == 0;
-    if (retval && tstate->c_profilefunc)
-    #endif
-        retval = tstate->c_profilefunc(tstate->c_profileobj, *frame, PyTrace_CALL, NULL) == 0;
-    tstate->use_tracing = (tstate->c_profilefunc ||
-                           (CYTHON_TRACE && tstate->c_tracefunc));
-    tstate->tracing--;
-    if (retval) {
-        __Pyx_ErrRestoreInState(tstate, type, value, traceback);
-        return tstate->use_tracing && retval;
-    } else {
-        Py_XDECREF(type);
-        Py_XDECREF(value);
-        Py_XDECREF(traceback);
-        return -1;
-    }
-}
-static PyCodeObject *__Pyx_createFrameCodeObject(const char *funcname, const char *srcfile, int firstlineno) {
-    PyObject *py_srcfile = 0;
-    PyObject *py_funcname = 0;
-    PyCodeObject *py_code = 0;
-    #if PY_MAJOR_VERSION < 3
-    py_funcname = PyString_FromString(funcname);
-    py_srcfile = PyString_FromString(srcfile);
-    #else
-    py_funcname = PyUnicode_FromString(funcname);
-    py_srcfile = PyUnicode_FromString(srcfile);
-    #endif
-    if (!py_funcname | !py_srcfile) goto bad;
-    py_code = PyCode_New(
-        0,
-        #if PY_MAJOR_VERSION >= 3
-        0,
-        #endif
-        0,
-        0,
-        CO_OPTIMIZED | CO_NEWLOCALS,
-        __pyx_empty_bytes,     /*PyObject *code,*/
-        __pyx_empty_tuple,     /*PyObject *consts,*/
-        __pyx_empty_tuple,     /*PyObject *names,*/
-        __pyx_empty_tuple,     /*PyObject *varnames,*/
-        __pyx_empty_tuple,     /*PyObject *freevars,*/
-        __pyx_empty_tuple,     /*PyObject *cellvars,*/
-        py_srcfile,       /*PyObject *filename,*/
-        py_funcname,      /*PyObject *name,*/
-        firstlineno,
-        __pyx_empty_bytes      /*PyObject *lnotab*/
-    );
-bad:
-    Py_XDECREF(py_srcfile);
-    Py_XDECREF(py_funcname);
-    return py_code;
-}
-#endif
-
-/* WriteUnraisableException */
-static void __Pyx_WriteUnraisable(const char *name, CYTHON_UNUSED int clineno,
-                                  CYTHON_UNUSED int lineno, CYTHON_UNUSED const char *filename,
-                                  int full_traceback, CYTHON_UNUSED int nogil) {
-    PyObject *old_exc, *old_val, *old_tb;
-    PyObject *ctx;
-    __Pyx_PyThreadState_declare
-#ifdef WITH_THREAD
-    PyGILState_STATE state;
-    if (nogil)
-        state = PyGILState_Ensure();
-#ifdef _MSC_VER
-    else state = (PyGILState_STATE)-1;
-#endif
-#endif
-    __Pyx_PyThreadState_assign
-    __Pyx_ErrFetch(&old_exc, &old_val, &old_tb);
-    if (full_traceback) {
-        Py_XINCREF(old_exc);
-        Py_XINCREF(old_val);
-        Py_XINCREF(old_tb);
-        __Pyx_ErrRestore(old_exc, old_val, old_tb);
-        PyErr_PrintEx(1);
-    }
-    #if PY_MAJOR_VERSION < 3
-    ctx = PyString_FromString(name);
-    #else
-    ctx = PyUnicode_FromString(name);
-    #endif
-    __Pyx_ErrRestore(old_exc, old_val, old_tb);
-    if (!ctx) {
-        PyErr_WriteUnraisable(Py_None);
-    } else {
-        PyErr_WriteUnraisable(ctx);
-        Py_DECREF(ctx);
-    }
-#ifdef WITH_THREAD
-    if (nogil)
-        PyGILState_Release(state);
-#endif
-}
-
-/* RaiseArgTupleInvalid */
-static void __Pyx_RaiseArgtupleInvalid(
-    const char* func_name,
-    int exact,
-    Py_ssize_t num_min,
-    Py_ssize_t num_max,
-    Py_ssize_t num_found)
-{
-    Py_ssize_t num_expected;
-    const char *more_or_less;
-    if (num_found < num_min) {
-        num_expected = num_min;
-        more_or_less = "at least";
-    } else {
-        num_expected = num_max;
-        more_or_less = "at most";
-    }
-    if (exact) {
-        more_or_less = "exactly";
-    }
-    PyErr_Format(PyExc_TypeError,
-                 "%.200s() takes %.8s %" CYTHON_FORMAT_SSIZE_T "d positional argument%.1s (%" CYTHON_FORMAT_SSIZE_T "d given)",
-                 func_name, more_or_less, num_expected,
-                 (num_expected == 1) ? "" : "s", num_found);
-}
-
-/* RaiseDoubleKeywords */
-static void __Pyx_RaiseDoubleKeywordsError(
-    const char* func_name,
-    PyObject* kw_name)
-{
-    PyErr_Format(PyExc_TypeError,
-        #if PY_MAJOR_VERSION >= 3
-        "%s() got multiple values for keyword argument '%U'", func_name, kw_name);
-        #else
-        "%s() got multiple values for keyword argument '%s'", func_name,
-        PyString_AsString(kw_name));
-        #endif
-}
-
-/* ParseKeywords */
-static int __Pyx_ParseOptionalKeywords(
-    PyObject *kwds,
-    PyObject **argnames[],
-    PyObject *kwds2,
-    PyObject *values[],
-    Py_ssize_t num_pos_args,
-    const char* function_name)
-{
-    PyObject *key = 0, *value = 0;
-    Py_ssize_t pos = 0;
-    PyObject*** name;
-    PyObject*** first_kw_arg = argnames + num_pos_args;
-    while (PyDict_Next(kwds, &pos, &key, &value)) {
-        name = first_kw_arg;
-        while (*name && (**name != key)) name++;
-        if (*name) {
-            values[name-argnames] = value;
-            continue;
-        }
-        name = first_kw_arg;
-        #if PY_MAJOR_VERSION < 3
-        if (likely(PyString_CheckExact(key)) || likely(PyString_Check(key))) {
-            while (*name) {
-                if ((CYTHON_COMPILING_IN_PYPY || PyString_GET_SIZE(**name) == PyString_GET_SIZE(key))
-                        && _PyString_Eq(**name, key)) {
-                    values[name-argnames] = value;
-                    break;
-                }
-                name++;
-            }
-            if (*name) continue;
-            else {
-                PyObject*** argname = argnames;
-                while (argname != first_kw_arg) {
-                    if ((**argname == key) || (
-                            (CYTHON_COMPILING_IN_PYPY || PyString_GET_SIZE(**argname) == PyString_GET_SIZE(key))
-                             && _PyString_Eq(**argname, key))) {
-                        goto arg_passed_twice;
-                    }
-                    argname++;
-                }
-            }
-        } else
-        #endif
-        if (likely(PyUnicode_Check(key))) {
-            while (*name) {
-                int cmp = (**name == key) ? 0 :
-                #if !CYTHON_COMPILING_IN_PYPY && PY_MAJOR_VERSION >= 3
-                    (PyUnicode_GET_SIZE(**name) != PyUnicode_GET_SIZE(key)) ? 1 :
-                #endif
-                    PyUnicode_Compare(**name, key);
-                if (cmp < 0 && unlikely(PyErr_Occurred())) goto bad;
-                if (cmp == 0) {
-                    values[name-argnames] = value;
-                    break;
-                }
-                name++;
-            }
-            if (*name) continue;
-            else {
-                PyObject*** argname = argnames;
-                while (argname != first_kw_arg) {
-                    int cmp = (**argname == key) ? 0 :
-                    #if !CYTHON_COMPILING_IN_PYPY && PY_MAJOR_VERSION >= 3
-                        (PyUnicode_GET_SIZE(**argname) != PyUnicode_GET_SIZE(key)) ? 1 :
-                    #endif
-                        PyUnicode_Compare(**argname, key);
-                    if (cmp < 0 && unlikely(PyErr_Occurred())) goto bad;
-                    if (cmp == 0) goto arg_passed_twice;
-                    argname++;
-                }
-            }
-        } else
-            goto invalid_keyword_type;
-        if (kwds2) {
-            if (unlikely(PyDict_SetItem(kwds2, key, value))) goto bad;
-        } else {
-            goto invalid_keyword;
-        }
-    }
-    return 0;
-arg_passed_twice:
-    __Pyx_RaiseDoubleKeywordsError(function_name, key);
-    goto bad;
-invalid_keyword_type:
-    PyErr_Format(PyExc_TypeError,
-        "%.200s() keywords must be strings", function_name);
-    goto bad;
-invalid_keyword:
-    PyErr_Format(PyExc_TypeError,
-    #if PY_MAJOR_VERSION < 3
-        "%.200s() got an unexpected keyword argument '%.200s'",
-        function_name, PyString_AsString(key));
-    #else
-        "%s() got an unexpected keyword argument '%U'",
-        function_name, key);
-    #endif
-bad:
-    return -1;
-}
-
-/* None */
-static CYTHON_INLINE void __Pyx_RaiseClosureNameError(const char *varname) {
-    PyErr_Format(PyExc_NameError, "free variable '%s' referenced before assignment in enclosing scope", varname);
-}
-
-/* PyObjectCall */
-#if CYTHON_COMPILING_IN_CPYTHON
-static CYTHON_INLINE PyObject* __Pyx_PyObject_Call(PyObject *func, PyObject *arg, PyObject *kw) {
-    PyObject *result;
-    ternaryfunc call = func->ob_type->tp_call;
-    if (unlikely(!call))
-        return PyObject_Call(func, arg, kw);
-    if (unlikely(Py_EnterRecursiveCall((char*)" while calling a Python object")))
-        return NULL;
-    result = (*call)(func, arg, kw);
-    Py_LeaveRecursiveCall();
-    if (unlikely(!result) && unlikely(!PyErr_Occurred())) {
-        PyErr_SetString(
-            PyExc_SystemError,
-            "NULL result without error in PyObject_Call");
-    }
-    return result;
-}
-#endif
-
-/* RaiseException */
-#if PY_MAJOR_VERSION < 3
-static void __Pyx_Raise(PyObject *type, PyObject *value, PyObject *tb,
-                        CYTHON_UNUSED PyObject *cause) {
-    __Pyx_PyThreadState_declare
-    Py_XINCREF(type);
-    if (!value || value == Py_None)
-        value = NULL;
-    else
-        Py_INCREF(value);
-    if (!tb || tb == Py_None)
-        tb = NULL;
-    else {
-        Py_INCREF(tb);
-        if (!PyTraceBack_Check(tb)) {
-            PyErr_SetString(PyExc_TypeError,
-                "raise: arg 3 must be a traceback or None");
-            goto raise_error;
-        }
-    }
-    if (PyType_Check(type)) {
-#if CYTHON_COMPILING_IN_PYPY
-        if (!value) {
-            Py_INCREF(Py_None);
-            value = Py_None;
-        }
-#endif
-        PyErr_NormalizeException(&type, &value, &tb);
-    } else {
-        if (value) {
-            PyErr_SetString(PyExc_TypeError,
-                "instance exception may not have a separate value");
-            goto raise_error;
-        }
-        value = type;
-        type = (PyObject*) Py_TYPE(type);
-        Py_INCREF(type);
-        if (!PyType_IsSubtype((PyTypeObject *)type, (PyTypeObject *)PyExc_BaseException)) {
-            PyErr_SetString(PyExc_TypeError,
-                "raise: exception class must be a subclass of BaseException");
-            goto raise_error;
-        }
-    }
-    __Pyx_PyThreadState_assign
-    __Pyx_ErrRestore(type, value, tb);
-    return;
-raise_error:
-    Py_XDECREF(value);
-    Py_XDECREF(type);
-    Py_XDECREF(tb);
-    return;
-}
-#else
-static void __Pyx_Raise(PyObject *type, PyObject *value, PyObject *tb, PyObject *cause) {
-    PyObject* owned_instance = NULL;
-    if (tb == Py_None) {
-        tb = 0;
-    } else if (tb && !PyTraceBack_Check(tb)) {
-        PyErr_SetString(PyExc_TypeError,
-            "raise: arg 3 must be a traceback or None");
-        goto bad;
-    }
-    if (value == Py_None)
-        value = 0;
-    if (PyExceptionInstance_Check(type)) {
-        if (value) {
-            PyErr_SetString(PyExc_TypeError,
-                "instance exception may not have a separate value");
-            goto bad;
-        }
-        value = type;
-        type = (PyObject*) Py_TYPE(value);
-    } else if (PyExceptionClass_Check(type)) {
-        PyObject *instance_class = NULL;
-        if (value && PyExceptionInstance_Check(value)) {
-            instance_class = (PyObject*) Py_TYPE(value);
-            if (instance_class != type) {
-                int is_subclass = PyObject_IsSubclass(instance_class, type);
-                if (!is_subclass) {
-                    instance_class = NULL;
-                } else if (unlikely(is_subclass == -1)) {
-                    goto bad;
-                } else {
-                    type = instance_class;
-                }
-            }
-        }
-        if (!instance_class) {
-            PyObject *args;
-            if (!value)
-                args = PyTuple_New(0);
-            else if (PyTuple_Check(value)) {
-                Py_INCREF(value);
-                args = value;
-            } else
-                args = PyTuple_Pack(1, value);
-            if (!args)
-                goto bad;
-            owned_instance = PyObject_Call(type, args, NULL);
-            Py_DECREF(args);
-            if (!owned_instance)
-                goto bad;
-            value = owned_instance;
-            if (!PyExceptionInstance_Check(value)) {
-                PyErr_Format(PyExc_TypeError,
-                             "calling %R should have returned an instance of "
-                             "BaseException, not %R",
-                             type, Py_TYPE(value));
-                goto bad;
-            }
-        }
-    } else {
-        PyErr_SetString(PyExc_TypeError,
-            "raise: exception class must be a subclass of BaseException");
-        goto bad;
-    }
-    if (cause) {
-        PyObject *fixed_cause;
-        if (cause == Py_None) {
-            fixed_cause = NULL;
-        } else if (PyExceptionClass_Check(cause)) {
-            fixed_cause = PyObject_CallObject(cause, NULL);
-            if (fixed_cause == NULL)
-                goto bad;
-        } else if (PyExceptionInstance_Check(cause)) {
-            fixed_cause = cause;
-            Py_INCREF(fixed_cause);
-        } else {
-            PyErr_SetString(PyExc_TypeError,
-                            "exception causes must derive from "
-                            "BaseException");
-            goto bad;
-        }
-        PyException_SetCause(value, fixed_cause);
-    }
-    PyErr_SetObject(type, value);
-    if (tb) {
-#if CYTHON_COMPILING_IN_PYPY
-        PyObject *tmp_type, *tmp_value, *tmp_tb;
-        PyErr_Fetch(&tmp_type, &tmp_value, &tmp_tb);
-        Py_INCREF(tb);
-        PyErr_Restore(tmp_type, tmp_value, tb);
-        Py_XDECREF(tmp_tb);
-#else
-        PyThreadState *tstate = __Pyx_PyThreadState_Current;
-        PyObject* tmp_tb = tstate->curexc_traceback;
-        if (tb != tmp_tb) {
-            Py_INCREF(tb);
-            tstate->curexc_traceback = tb;
-            Py_XDECREF(tmp_tb);
-        }
-#endif
-    }
-bad:
-    Py_XDECREF(owned_instance);
-    return;
-}
-#endif
-
-/* GetModuleGlobalName */
-static CYTHON_INLINE PyObject *__Pyx_GetModuleGlobalName(PyObject *name) {
-    PyObject *result;
-#if !CYTHON_AVOID_BORROWED_REFS
-#if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x030500A1
-    result = _PyDict_GetItem_KnownHash(__pyx_d, name, ((PyASCIIObject *) name)->hash);
-    if (likely(result)) {
-        Py_INCREF(result);
-    } else if (unlikely(PyErr_Occurred())) {
-        result = NULL;
-    } else {
-#else
-    result = PyDict_GetItem(__pyx_d, name);
-    if (likely(result)) {
-        Py_INCREF(result);
-    } else {
-#endif
-#else
-    result = PyObject_GetItem(__pyx_d, name);
-    if (!result) {
-        PyErr_Clear();
-#endif
-        result = __Pyx_GetBuiltinName(name);
-    }
-    return result;
-}
-
-/* PyCFunctionFastCall */
-    #if CYTHON_FAST_PYCCALL
-static CYTHON_INLINE PyObject * __Pyx_PyCFunction_FastCall(PyObject *func_obj, PyObject **args, Py_ssize_t nargs) {
-    PyCFunctionObject *func = (PyCFunctionObject*)func_obj;
-    PyCFunction meth = PyCFunction_GET_FUNCTION(func);
-    PyObject *self = PyCFunction_GET_SELF(func);
-    int flags = PyCFunction_GET_FLAGS(func);
-    assert(PyCFunction_Check(func));
-    assert(METH_FASTCALL == (flags & ~(METH_CLASS | METH_STATIC | METH_COEXIST | METH_KEYWORDS)));
-    assert(nargs >= 0);
-    assert(nargs == 0 || args != NULL);
-    /* _PyCFunction_FastCallDict() must not be called with an exception set,
-       because it may clear it (directly or indirectly) and so the
-       caller loses its exception */
-    assert(!PyErr_Occurred());
-    if ((PY_VERSION_HEX < 0x030700A0) || unlikely(flags & METH_KEYWORDS)) {
-        return (*((__Pyx_PyCFunctionFastWithKeywords)meth)) (self, args, nargs, NULL);
-    } else {
-        return (*((__Pyx_PyCFunctionFast)meth)) (self, args, nargs);
-    }
-}
-#endif
-
-/* PyFunctionFastCall */
-    #if CYTHON_FAST_PYCALL
-#include "frameobject.h"
-static PyObject* __Pyx_PyFunction_FastCallNoKw(PyCodeObject *co, PyObject **args, Py_ssize_t na,
-                                               PyObject *globals) {
-    PyFrameObject *f;
-    PyThreadState *tstate = __Pyx_PyThreadState_Current;
-    PyObject **fastlocals;
-    Py_ssize_t i;
-    PyObject *result;
-    assert(globals != NULL);
-    /* XXX Perhaps we should create a specialized
-       PyFrame_New() that doesn't take locals, but does
-       take builtins without sanity checking them.
-       */
-    assert(tstate != NULL);
-    f = PyFrame_New(tstate, co, globals, NULL);
-    if (f == NULL) {
-        return NULL;
-    }
-    fastlocals = f->f_localsplus;
-    for (i = 0; i < na; i++) {
-        Py_INCREF(*args);
-        fastlocals[i] = *args++;
-    }
-    result = PyEval_EvalFrameEx(f,0);
-    ++tstate->recursion_depth;
-    Py_DECREF(f);
-    --tstate->recursion_depth;
-    return result;
-}
-#if 1 || PY_VERSION_HEX < 0x030600B1
-static PyObject *__Pyx_PyFunction_FastCallDict(PyObject *func, PyObject **args, int nargs, PyObject *kwargs) {
-    PyCodeObject *co = (PyCodeObject *)PyFunction_GET_CODE(func);
-    PyObject *globals = PyFunction_GET_GLOBALS(func);
-    PyObject *argdefs = PyFunction_GET_DEFAULTS(func);
-    PyObject *closure;
-#if PY_MAJOR_VERSION >= 3
-    PyObject *kwdefs;
-#endif
-    PyObject *kwtuple, **k;
-    PyObject **d;
-    Py_ssize_t nd;
-    Py_ssize_t nk;
-    PyObject *result;
-    assert(kwargs == NULL || PyDict_Check(kwargs));
-    nk = kwargs ? PyDict_Size(kwargs) : 0;
-    if (Py_EnterRecursiveCall((char*)" while calling a Python object")) {
-        return NULL;
-    }
-    if (
-#if PY_MAJOR_VERSION >= 3
-            co->co_kwonlyargcount == 0 &&
-#endif
-            likely(kwargs == NULL || nk == 0) &&
-            co->co_flags == (CO_OPTIMIZED | CO_NEWLOCALS | CO_NOFREE)) {
-        if (argdefs == NULL && co->co_argcount == nargs) {
-            result = __Pyx_PyFunction_FastCallNoKw(co, args, nargs, globals);
-            goto done;
-        }
-        else if (nargs == 0 && argdefs != NULL
-                 && co->co_argcount == Py_SIZE(argdefs)) {
-            /* function called with no arguments, but all parameters have
-               a default value: use default values as arguments .*/
-            args = &PyTuple_GET_ITEM(argdefs, 0);
-            result =__Pyx_PyFunction_FastCallNoKw(co, args, Py_SIZE(argdefs), globals);
-            goto done;
-        }
-    }
-    if (kwargs != NULL) {
-        Py_ssize_t pos, i;
-        kwtuple = PyTuple_New(2 * nk);
-        if (kwtuple == NULL) {
-            result = NULL;
-            goto done;
-        }
-        k = &PyTuple_GET_ITEM(kwtuple, 0);
-        pos = i = 0;
-        while (PyDict_Next(kwargs, &pos, &k[i], &k[i+1])) {
-            Py_INCREF(k[i]);
-            Py_INCREF(k[i+1]);
-            i += 2;
-        }
-        nk = i / 2;
-    }
-    else {
-        kwtuple = NULL;
-        k = NULL;
-    }
-    closure = PyFunction_GET_CLOSURE(func);
-#if PY_MAJOR_VERSION >= 3
-    kwdefs = PyFunction_GET_KW_DEFAULTS(func);
-#endif
-    if (argdefs != NULL) {
-        d = &PyTuple_GET_ITEM(argdefs, 0);
-        nd = Py_SIZE(argdefs);
-    }
-    else {
-        d = NULL;
-        nd = 0;
-    }
-#if PY_MAJOR_VERSION >= 3
-    result = PyEval_EvalCodeEx((PyObject*)co, globals, (PyObject *)NULL,
-                               args, nargs,
-                               k, (int)nk,
-                               d, (int)nd, kwdefs, closure);
-#else
-    result = PyEval_EvalCodeEx(co, globals, (PyObject *)NULL,
-                               args, nargs,
-                               k, (int)nk,
-                               d, (int)nd, closure);
-#endif
-    Py_XDECREF(kwtuple);
-done:
-    Py_LeaveRecursiveCall();
-    return result;
-}
-#endif
-#endif
-
-/* PyObjectCallMethO */
-    #if CYTHON_COMPILING_IN_CPYTHON
-static CYTHON_INLINE PyObject* __Pyx_PyObject_CallMethO(PyObject *func, PyObject *arg) {
-    PyObject *self, *result;
-    PyCFunction cfunc;
-    cfunc = PyCFunction_GET_FUNCTION(func);
-    self = PyCFunction_GET_SELF(func);
-    if (unlikely(Py_EnterRecursiveCall((char*)" while calling a Python object")))
-        return NULL;
-    result = cfunc(self, arg);
-    Py_LeaveRecursiveCall();
-    if (unlikely(!result) && unlikely(!PyErr_Occurred())) {
-        PyErr_SetString(
-            PyExc_SystemError,
-            "NULL result without error in PyObject_Call");
-    }
-    return result;
-}
-#endif
-
-/* PyObjectCallOneArg */
-    #if CYTHON_COMPILING_IN_CPYTHON
-static PyObject* __Pyx__PyObject_CallOneArg(PyObject *func, PyObject *arg) {
-    PyObject *result;
-    PyObject *args = PyTuple_New(1);
-    if (unlikely(!args)) return NULL;
-    Py_INCREF(arg);
-    PyTuple_SET_ITEM(args, 0, arg);
-    result = __Pyx_PyObject_Call(func, args, NULL);
-    Py_DECREF(args);
-    return result;
-}
-static CYTHON_INLINE PyObject* __Pyx_PyObject_CallOneArg(PyObject *func, PyObject *arg) {
-#if CYTHON_FAST_PYCALL
-    if (PyFunction_Check(func)) {
-        return __Pyx_PyFunction_FastCall(func, &arg, 1);
-    }
-#endif
-    if (likely(PyCFunction_Check(func))) {
-        if (likely(PyCFunction_GET_FLAGS(func) & METH_O)) {
-            return __Pyx_PyObject_CallMethO(func, arg);
-#if CYTHON_FAST_PYCCALL
-        } else if (PyCFunction_GET_FLAGS(func) & METH_FASTCALL) {
-            return __Pyx_PyCFunction_FastCall(func, &arg, 1);
-#endif
-        }
-    }
-    return __Pyx__PyObject_CallOneArg(func, arg);
-}
-#else
-static CYTHON_INLINE PyObject* __Pyx_PyObject_CallOneArg(PyObject *func, PyObject *arg) {
-    PyObject *result;
-    PyObject *args = PyTuple_Pack(1, arg);
-    if (unlikely(!args)) return NULL;
-    result = __Pyx_PyObject_Call(func, args, NULL);
-    Py_DECREF(args);
-    return result;
-}
-#endif
-
-/* FetchCommonType */
-    static PyTypeObject* __Pyx_FetchCommonType(PyTypeObject* type) {
-    PyObject* fake_module;
-    PyTypeObject* cached_type = NULL;
-    fake_module = PyImport_AddModule((char*) "_cython_" CYTHON_ABI);
-    if (!fake_module) return NULL;
-    Py_INCREF(fake_module);
-    cached_type = (PyTypeObject*) PyObject_GetAttrString(fake_module, type->tp_name);
-    if (cached_type) {
-        if (!PyType_Check((PyObject*)cached_type)) {
-            PyErr_Format(PyExc_TypeError,
-                "Shared Cython type %.200s is not a type object",
-                type->tp_name);
-            goto bad;
-        }
-        if (cached_type->tp_basicsize != type->tp_basicsize) {
-            PyErr_Format(PyExc_TypeError,
-                "Shared Cython type %.200s has the wrong size, try recompiling",
-                type->tp_name);
-            goto bad;
-        }
-    } else {
-        if (!PyErr_ExceptionMatches(PyExc_AttributeError)) goto bad;
-        PyErr_Clear();
-        if (PyType_Ready(type) < 0) goto bad;
-        if (PyObject_SetAttrString(fake_module, type->tp_name, (PyObject*) type) < 0)
-            goto bad;
-        Py_INCREF(type);
-        cached_type = type;
-    }
-done:
-    Py_DECREF(fake_module);
-    return cached_type;
-bad:
-    Py_XDECREF(cached_type);
-    cached_type = NULL;
-    goto done;
-}
-
-/* CythonFunction */
-    #include <structmember.h>
-static PyObject *
-__Pyx_CyFunction_get_doc(__pyx_CyFunctionObject *op, CYTHON_UNUSED void *closure)
-{
-    if (unlikely(op->func_doc == NULL)) {
-        if (op->func.m_ml->ml_doc) {
-#if PY_MAJOR_VERSION >= 3
-            op->func_doc = PyUnicode_FromString(op->func.m_ml->ml_doc);
-#else
-            op->func_doc = PyString_FromString(op->func.m_ml->ml_doc);
-#endif
-            if (unlikely(op->func_doc == NULL))
-                return NULL;
-        } else {
-            Py_INCREF(Py_None);
-            return Py_None;
-        }
-    }
-    Py_INCREF(op->func_doc);
-    return op->func_doc;
-}
-static int
-__Pyx_CyFunction_set_doc(__pyx_CyFunctionObject *op, PyObject *value)
-{
-    PyObject *tmp = op->func_doc;
-    if (value == NULL) {
-        value = Py_None;
-    }
-    Py_INCREF(value);
-    op->func_doc = value;
-    Py_XDECREF(tmp);
-    return 0;
-}
-static PyObject *
-__Pyx_CyFunction_get_name(__pyx_CyFunctionObject *op)
-{
-    if (unlikely(op->func_name == NULL)) {
-#if PY_MAJOR_VERSION >= 3
-        op->func_name = PyUnicode_InternFromString(op->func.m_ml->ml_name);
-#else
-        op->func_name = PyString_InternFromString(op->func.m_ml->ml_name);
-#endif
-        if (unlikely(op->func_name == NULL))
-            return NULL;
-    }
-    Py_INCREF(op->func_name);
-    return op->func_name;
-}
-static int
-__Pyx_CyFunction_set_name(__pyx_CyFunctionObject *op, PyObject *value)
-{
-    PyObject *tmp;
-#if PY_MAJOR_VERSION >= 3
-    if (unlikely(value == NULL || !PyUnicode_Check(value))) {
-#else
-    if (unlikely(value == NULL || !PyString_Check(value))) {
-#endif
-        PyErr_SetString(PyExc_TypeError,
-                        "__name__ must be set to a string object");
-        return -1;
-    }
-    tmp = op->func_name;
-    Py_INCREF(value);
-    op->func_name = value;
-    Py_XDECREF(tmp);
-    return 0;
-}
-static PyObject *
-__Pyx_CyFunction_get_qualname(__pyx_CyFunctionObject *op)
-{
-    Py_INCREF(op->func_qualname);
-    return op->func_qualname;
-}
-static int
-__Pyx_CyFunction_set_qualname(__pyx_CyFunctionObject *op, PyObject *value)
-{
-    PyObject *tmp;
-#if PY_MAJOR_VERSION >= 3
-    if (unlikely(value == NULL || !PyUnicode_Check(value))) {
-#else
-    if (unlikely(value == NULL || !PyString_Check(value))) {
-#endif
-        PyErr_SetString(PyExc_TypeError,
-                        "__qualname__ must be set to a string object");
-        return -1;
-    }
-    tmp = op->func_qualname;
-    Py_INCREF(value);
-    op->func_qualname = value;
-    Py_XDECREF(tmp);
-    return 0;
-}
-static PyObject *
-__Pyx_CyFunction_get_self(__pyx_CyFunctionObject *m, CYTHON_UNUSED void *closure)
-{
-    PyObject *self;
-    self = m->func_closure;
-    if (self == NULL)
-        self = Py_None;
-    Py_INCREF(self);
-    return self;
-}
-static PyObject *
-__Pyx_CyFunction_get_dict(__pyx_CyFunctionObject *op)
-{
-    if (unlikely(op->func_dict == NULL)) {
-        op->func_dict = PyDict_New();
-        if (unlikely(op->func_dict == NULL))
-            return NULL;
-    }
-    Py_INCREF(op->func_dict);
-    return op->func_dict;
-}
-static int
-__Pyx_CyFunction_set_dict(__pyx_CyFunctionObject *op, PyObject *value)
-{
-    PyObject *tmp;
-    if (unlikely(value == NULL)) {
-        PyErr_SetString(PyExc_TypeError,
-               "function's dictionary may not be deleted");
-        return -1;
-    }
-    if (unlikely(!PyDict_Check(value))) {
-        PyErr_SetString(PyExc_TypeError,
-               "setting function's dictionary to a non-dict");
-        return -1;
-    }
-    tmp = op->func_dict;
-    Py_INCREF(value);
-    op->func_dict = value;
-    Py_XDECREF(tmp);
-    return 0;
-}
-static PyObject *
-__Pyx_CyFunction_get_globals(__pyx_CyFunctionObject *op)
-{
-    Py_INCREF(op->func_globals);
-    return op->func_globals;
-}
-static PyObject *
-__Pyx_CyFunction_get_closure(CYTHON_UNUSED __pyx_CyFunctionObject *op)
-{
-    Py_INCREF(Py_None);
-    return Py_None;
-}
-static PyObject *
-__Pyx_CyFunction_get_code(__pyx_CyFunctionObject *op)
-{
-    PyObject* result = (op->func_code) ? op->func_code : Py_None;
-    Py_INCREF(result);
-    return result;
-}
-static int
-__Pyx_CyFunction_init_defaults(__pyx_CyFunctionObject *op) {
-    int result = 0;
-    PyObject *res = op->defaults_getter((PyObject *) op);
-    if (unlikely(!res))
-        return -1;
-    #if CYTHON_ASSUME_SAFE_MACROS && !CYTHON_AVOID_BORROWED_REFS
-    op->defaults_tuple = PyTuple_GET_ITEM(res, 0);
-    Py_INCREF(op->defaults_tuple);
-    op->defaults_kwdict = PyTuple_GET_ITEM(res, 1);
-    Py_INCREF(op->defaults_kwdict);
-    #else
-    op->defaults_tuple = PySequence_ITEM(res, 0);
-    if (unlikely(!op->defaults_tuple)) result = -1;
-    else {
-        op->defaults_kwdict = PySequence_ITEM(res, 1);
-        if (unlikely(!op->defaults_kwdict)) result = -1;
-    }
-    #endif
-    Py_DECREF(res);
-    return result;
-}
-static int
-__Pyx_CyFunction_set_defaults(__pyx_CyFunctionObject *op, PyObject* value) {
-    PyObject* tmp;
-    if (!value) {
-        value = Py_None;
-    } else if (value != Py_None && !PyTuple_Check(value)) {
-        PyErr_SetString(PyExc_TypeError,
-                        "__defaults__ must be set to a tuple object");
-        return -1;
-    }
-    Py_INCREF(value);
-    tmp = op->defaults_tuple;
-    op->defaults_tuple = value;
-    Py_XDECREF(tmp);
-    return 0;
-}
-static PyObject *
-__Pyx_CyFunction_get_defaults(__pyx_CyFunctionObject *op) {
-    PyObject* result = op->defaults_tuple;
-    if (unlikely(!result)) {
-        if (op->defaults_getter) {
-            if (__Pyx_CyFunction_init_defaults(op) < 0) return NULL;
-            result = op->defaults_tuple;
-        } else {
-            result = Py_None;
-        }
-    }
-    Py_INCREF(result);
-    return result;
-}
-static int
-__Pyx_CyFunction_set_kwdefaults(__pyx_CyFunctionObject *op, PyObject* value) {
-    PyObject* tmp;
-    if (!value) {
-        value = Py_None;
-    } else if (value != Py_None && !PyDict_Check(value)) {
-        PyErr_SetString(PyExc_TypeError,
-                        "__kwdefaults__ must be set to a dict object");
-        return -1;
-    }
-    Py_INCREF(value);
-    tmp = op->defaults_kwdict;
-    op->defaults_kwdict = value;
-    Py_XDECREF(tmp);
-    return 0;
-}
-static PyObject *
-__Pyx_CyFunction_get_kwdefaults(__pyx_CyFunctionObject *op) {
-    PyObject* result = op->defaults_kwdict;
-    if (unlikely(!result)) {
-        if (op->defaults_getter) {
-            if (__Pyx_CyFunction_init_defaults(op) < 0) return NULL;
-            result = op->defaults_kwdict;
-        } else {
-            result = Py_None;
-        }
-    }
-    Py_INCREF(result);
-    return result;
-}
-static int
-__Pyx_CyFunction_set_annotations(__pyx_CyFunctionObject *op, PyObject* value) {
-    PyObject* tmp;
-    if (!value || value == Py_None) {
-        value = NULL;
-    } else if (!PyDict_Check(value)) {
-        PyErr_SetString(PyExc_TypeError,
-                        "__annotations__ must be set to a dict object");
-        return -1;
-    }
-    Py_XINCREF(value);
-    tmp = op->func_annotations;
-    op->func_annotations = value;
-    Py_XDECREF(tmp);
-    return 0;
-}
-static PyObject *
-__Pyx_CyFunction_get_annotations(__pyx_CyFunctionObject *op) {
-    PyObject* result = op->func_annotations;
-    if (unlikely(!result)) {
-        result = PyDict_New();
-        if (unlikely(!result)) return NULL;
-        op->func_annotations = result;
-    }
-    Py_INCREF(result);
-    return result;
-}
-static PyGetSetDef __pyx_CyFunction_getsets[] = {
-    {(char *) "func_doc", (getter)__Pyx_CyFunction_get_doc, (setter)__Pyx_CyFunction_set_doc, 0, 0},
-    {(char *) "__doc__",  (getter)__Pyx_CyFunction_get_doc, (setter)__Pyx_CyFunction_set_doc, 0, 0},
-    {(char *) "func_name", (getter)__Pyx_CyFunction_get_name, (setter)__Pyx_CyFunction_set_name, 0, 0},
-    {(char *) "__name__", (getter)__Pyx_CyFunction_get_name, (setter)__Pyx_CyFunction_set_name, 0, 0},
-    {(char *) "__qualname__", (getter)__Pyx_CyFunction_get_qualname, (setter)__Pyx_CyFunction_set_qualname, 0, 0},
-    {(char *) "__self__", (getter)__Pyx_CyFunction_get_self, 0, 0, 0},
-    {(char *) "func_dict", (getter)__Pyx_CyFunction_get_dict, (setter)__Pyx_CyFunction_set_dict, 0, 0},
-    {(char *) "__dict__", (getter)__Pyx_CyFunction_get_dict, (setter)__Pyx_CyFunction_set_dict, 0, 0},
-    {(char *) "func_globals", (getter)__Pyx_CyFunction_get_globals, 0, 0, 0},
-    {(char *) "__globals__", (getter)__Pyx_CyFunction_get_globals, 0, 0, 0},
-    {(char *) "func_closure", (getter)__Pyx_CyFunction_get_closure, 0, 0, 0},
-    {(char *) "__closure__", (getter)__Pyx_CyFunction_get_closure, 0, 0, 0},
-    {(char *) "func_code", (getter)__Pyx_CyFunction_get_code, 0, 0, 0},
-    {(char *) "__code__", (getter)__Pyx_CyFunction_get_code, 0, 0, 0},
-    {(char *) "func_defaults", (getter)__Pyx_CyFunction_get_defaults, (setter)__Pyx_CyFunction_set_defaults, 0, 0},
-    {(char *) "__defaults__", (getter)__Pyx_CyFunction_get_defaults, (setter)__Pyx_CyFunction_set_defaults, 0, 0},
-    {(char *) "__kwdefaults__", (getter)__Pyx_CyFunction_get_kwdefaults, (setter)__Pyx_CyFunction_set_kwdefaults, 0, 0},
-    {(char *) "__annotations__", (getter)__Pyx_CyFunction_get_annotations, (setter)__Pyx_CyFunction_set_annotations, 0, 0},
-    {0, 0, 0, 0, 0}
-};
-static PyMemberDef __pyx_CyFunction_members[] = {
-    {(char *) "__module__", T_OBJECT, offsetof(PyCFunctionObject, m_module), PY_WRITE_RESTRICTED, 0},
-    {0, 0, 0,  0, 0}
-};
-static PyObject *
-__Pyx_CyFunction_reduce(__pyx_CyFunctionObject *m, CYTHON_UNUSED PyObject *args)
-{
-#if PY_MAJOR_VERSION >= 3
-    return PyUnicode_FromString(m->func.m_ml->ml_name);
-#else
-    return PyString_FromString(m->func.m_ml->ml_name);
-#endif
-}
-static PyMethodDef __pyx_CyFunction_methods[] = {
-    {"__reduce__", (PyCFunction)__Pyx_CyFunction_reduce, METH_VARARGS, 0},
-    {0, 0, 0, 0}
-};
-#if PY_VERSION_HEX < 0x030500A0
-#define __Pyx_CyFunction_weakreflist(cyfunc) ((cyfunc)->func_weakreflist)
-#else
-#define __Pyx_CyFunction_weakreflist(cyfunc) ((cyfunc)->func.m_weakreflist)
-#endif
-static PyObject *__Pyx_CyFunction_New(PyTypeObject *type, PyMethodDef *ml, int flags, PyObject* qualname,
-                                      PyObject *closure, PyObject *module, PyObject* globals, PyObject* code) {
-    __pyx_CyFunctionObject *op = PyObject_GC_New(__pyx_CyFunctionObject, type);
-    if (op == NULL)
-        return NULL;
-    op->flags = flags;
-    __Pyx_CyFunction_weakreflist(op) = NULL;
-    op->func.m_ml = ml;
-    op->func.m_self = (PyObject *) op;
-    Py_XINCREF(closure);
-    op->func_closure = closure;
-    Py_XINCREF(module);
-    op->func.m_module = module;
-    op->func_dict = NULL;
-    op->func_name = NULL;
-    Py_INCREF(qualname);
-    op->func_qualname = qualname;
-    op->func_doc = NULL;
-    op->func_classobj = NULL;
-    op->func_globals = globals;
-    Py_INCREF(op->func_globals);
-    Py_XINCREF(code);
-    op->func_code = code;
-    op->defaults_pyobjects = 0;
-    op->defaults = NULL;
-    op->defaults_tuple = NULL;
-    op->defaults_kwdict = NULL;
-    op->defaults_getter = NULL;
-    op->func_annotations = NULL;
-    PyObject_GC_Track(op);
-    return (PyObject *) op;
-}
-static int
-__Pyx_CyFunction_clear(__pyx_CyFunctionObject *m)
-{
-    Py_CLEAR(m->func_closure);
-    Py_CLEAR(m->func.m_module);
-    Py_CLEAR(m->func_dict);
-    Py_CLEAR(m->func_name);
-    Py_CLEAR(m->func_qualname);
-    Py_CLEAR(m->func_doc);
-    Py_CLEAR(m->func_globals);
-    Py_CLEAR(m->func_code);
-    Py_CLEAR(m->func_classobj);
-    Py_CLEAR(m->defaults_tuple);
-    Py_CLEAR(m->defaults_kwdict);
-    Py_CLEAR(m->func_annotations);
-    if (m->defaults) {
-        PyObject **pydefaults = __Pyx_CyFunction_Defaults(PyObject *, m);
-        int i;
-        for (i = 0; i < m->defaults_pyobjects; i++)
-            Py_XDECREF(pydefaults[i]);
-        PyObject_Free(m->defaults);
-        m->defaults = NULL;
-    }
-    return 0;
-}
-static void __Pyx__CyFunction_dealloc(__pyx_CyFunctionObject *m)
-{
-    if (__Pyx_CyFunction_weakreflist(m) != NULL)
-        PyObject_ClearWeakRefs((PyObject *) m);
-    __Pyx_CyFunction_clear(m);
-    PyObject_GC_Del(m);
-}
-static void __Pyx_CyFunction_dealloc(__pyx_CyFunctionObject *m)
-{
-    PyObject_GC_UnTrack(m);
-    __Pyx__CyFunction_dealloc(m);
-}
-static int __Pyx_CyFunction_traverse(__pyx_CyFunctionObject *m, visitproc visit, void *arg)
-{
-    Py_VISIT(m->func_closure);
-    Py_VISIT(m->func.m_module);
-    Py_VISIT(m->func_dict);
-    Py_VISIT(m->func_name);
-    Py_VISIT(m->func_qualname);
-    Py_VISIT(m->func_doc);
-    Py_VISIT(m->func_globals);
-    Py_VISIT(m->func_code);
-    Py_VISIT(m->func_classobj);
-    Py_VISIT(m->defaults_tuple);
-    Py_VISIT(m->defaults_kwdict);
-    if (m->defaults) {
-        PyObject **pydefaults = __Pyx_CyFunction_Defaults(PyObject *, m);
-        int i;
-        for (i = 0; i < m->defaults_pyobjects; i++)
-            Py_VISIT(pydefaults[i]);
-    }
-    return 0;
-}
-static PyObject *__Pyx_CyFunction_descr_get(PyObject *func, PyObject *obj, PyObject *type)
-{
-    __pyx_CyFunctionObject *m = (__pyx_CyFunctionObject *) func;
-    if (m->flags & __Pyx_CYFUNCTION_STATICMETHOD) {
-        Py_INCREF(func);
-        return func;
-    }
-    if (m->flags & __Pyx_CYFUNCTION_CLASSMETHOD) {
-        if (type == NULL)
-            type = (PyObject *)(Py_TYPE(obj));
-        return __Pyx_PyMethod_New(func, type, (PyObject *)(Py_TYPE(type)));
-    }
-    if (obj == Py_None)
-        obj = NULL;
-    return __Pyx_PyMethod_New(func, obj, type);
-}
-static PyObject*
-__Pyx_CyFunction_repr(__pyx_CyFunctionObject *op)
-{
-#if PY_MAJOR_VERSION >= 3
-    return PyUnicode_FromFormat("<cyfunction %U at %p>",
-                                op->func_qualname, (void *)op);
-#else
-    return PyString_FromFormat("<cyfunction %s at %p>",
-                               PyString_AsString(op->func_qualname), (void *)op);
-#endif
-}
-static PyObject * __Pyx_CyFunction_CallMethod(PyObject *func, PyObject *self, PyObject *arg, PyObject *kw) {
-    PyCFunctionObject* f = (PyCFunctionObject*)func;
-    PyCFunction meth = f->m_ml->ml_meth;
-    Py_ssize_t size;
-    switch (f->m_ml->ml_flags & (METH_VARARGS | METH_KEYWORDS | METH_NOARGS | METH_O)) {
-    case METH_VARARGS:
-        if (likely(kw == NULL || PyDict_Size(kw) == 0))
-            return (*meth)(self, arg);
-        break;
-    case METH_VARARGS | METH_KEYWORDS:
-        return (*(PyCFunctionWithKeywords)meth)(self, arg, kw);
-    case METH_NOARGS:
-        if (likely(kw == NULL || PyDict_Size(kw) == 0)) {
-            size = PyTuple_GET_SIZE(arg);
-            if (likely(size == 0))
-                return (*meth)(self, NULL);
-            PyErr_Format(PyExc_TypeError,
-                "%.200s() takes no arguments (%" CYTHON_FORMAT_SSIZE_T "d given)",
-                f->m_ml->ml_name, size);
-            return NULL;
-        }
-        break;
-    case METH_O:
-        if (likely(kw == NULL || PyDict_Size(kw) == 0)) {
-            size = PyTuple_GET_SIZE(arg);
-            if (likely(size == 1)) {
-                PyObject *result, *arg0;
-                #if CYTHON_ASSUME_SAFE_MACROS && !CYTHON_AVOID_BORROWED_REFS
-                arg0 = PyTuple_GET_ITEM(arg, 0);
-                #else
-                arg0 = PySequence_ITEM(arg, 0); if (unlikely(!arg0)) return NULL;
-                #endif
-                result = (*meth)(self, arg0);
-                #if !(CYTHON_ASSUME_SAFE_MACROS && !CYTHON_AVOID_BORROWED_REFS)
-                Py_DECREF(arg0);
-                #endif
-                return result;
-            }
-            PyErr_Format(PyExc_TypeError,
-                "%.200s() takes exactly one argument (%" CYTHON_FORMAT_SSIZE_T "d given)",
-                f->m_ml->ml_name, size);
-            return NULL;
-        }
-        break;
-    default:
-        PyErr_SetString(PyExc_SystemError, "Bad call flags in "
-                        "__Pyx_CyFunction_Call. METH_OLDARGS is no "
-                        "longer supported!");
-        return NULL;
-    }
-    PyErr_Format(PyExc_TypeError, "%.200s() takes no keyword arguments",
-                 f->m_ml->ml_name);
-    return NULL;
-}
-static CYTHON_INLINE PyObject *__Pyx_CyFunction_Call(PyObject *func, PyObject *arg, PyObject *kw) {
-    return __Pyx_CyFunction_CallMethod(func, ((PyCFunctionObject*)func)->m_self, arg, kw);
-}
-static PyObject *__Pyx_CyFunction_CallAsMethod(PyObject *func, PyObject *args, PyObject *kw) {
-    PyObject *result;
-    __pyx_CyFunctionObject *cyfunc = (__pyx_CyFunctionObject *) func;
-    if ((cyfunc->flags & __Pyx_CYFUNCTION_CCLASS) && !(cyfunc->flags & __Pyx_CYFUNCTION_STATICMETHOD)) {
-        Py_ssize_t argc;
-        PyObject *new_args;
-        PyObject *self;
-        argc = PyTuple_GET_SIZE(args);
-        new_args = PyTuple_GetSlice(args, 1, argc);
-        if (unlikely(!new_args))
-            return NULL;
-        self = PyTuple_GetItem(args, 0);
-        if (unlikely(!self)) {
-            Py_DECREF(new_args);
-            return NULL;
-        }
-        result = __Pyx_CyFunction_CallMethod(func, self, new_args, kw);
-        Py_DECREF(new_args);
-    } else {
-        result = __Pyx_CyFunction_Call(func, args, kw);
-    }
-    return result;
-}
-static PyTypeObject __pyx_CyFunctionType_type = {
-    PyVarObject_HEAD_INIT(0, 0)
-    "cython_function_or_method",
-    sizeof(__pyx_CyFunctionObject),
-    0,
-    (destructor) __Pyx_CyFunction_dealloc,
-    0,
-    0,
-    0,
-#if PY_MAJOR_VERSION < 3
-    0,
-#else
-    0,
-#endif
-    (reprfunc) __Pyx_CyFunction_repr,
-    0,
-    0,
-    0,
-    0,
-    __Pyx_CyFunction_CallAsMethod,
-    0,
-    0,
-    0,
-    0,
-    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,
-    0,
-    (traverseproc) __Pyx_CyFunction_traverse,
-    (inquiry) __Pyx_CyFunction_clear,
-    0,
-#if PY_VERSION_HEX < 0x030500A0
-    offsetof(__pyx_CyFunctionObject, func_weakreflist),
-#else
-    offsetof(PyCFunctionObject, m_weakreflist),
-#endif
-    0,
-    0,
-    __pyx_CyFunction_methods,
-    __pyx_CyFunction_members,
-    __pyx_CyFunction_getsets,
-    0,
-    0,
-    __Pyx_CyFunction_descr_get,
-    0,
-    offsetof(__pyx_CyFunctionObject, func_dict),
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-#if PY_VERSION_HEX >= 0x030400a1
-    0,
-#endif
-};
-static int __pyx_CyFunction_init(void) {
-    __pyx_CyFunctionType = __Pyx_FetchCommonType(&__pyx_CyFunctionType_type);
-    if (unlikely(__pyx_CyFunctionType == NULL)) {
-        return -1;
-    }
-    return 0;
-}
-static CYTHON_INLINE void *__Pyx_CyFunction_InitDefaults(PyObject *func, size_t size, int pyobjects) {
-    __pyx_CyFunctionObject *m = (__pyx_CyFunctionObject *) func;
-    m->defaults = PyObject_Malloc(size);
-    if (unlikely(!m->defaults))
-        return PyErr_NoMemory();
-    memset(m->defaults, 0, size);
-    m->defaults_pyobjects = pyobjects;
-    return m->defaults;
-}
-static CYTHON_INLINE void __Pyx_CyFunction_SetDefaultsTuple(PyObject *func, PyObject *tuple) {
-    __pyx_CyFunctionObject *m = (__pyx_CyFunctionObject *) func;
-    m->defaults_tuple = tuple;
-    Py_INCREF(tuple);
-}
-static CYTHON_INLINE void __Pyx_CyFunction_SetDefaultsKwDict(PyObject *func, PyObject *dict) {
-    __pyx_CyFunctionObject *m = (__pyx_CyFunctionObject *) func;
-    m->defaults_kwdict = dict;
-    Py_INCREF(dict);
-}
-static CYTHON_INLINE void __Pyx_CyFunction_SetAnnotationsDict(PyObject *func, PyObject *dict) {
-    __pyx_CyFunctionObject *m = (__pyx_CyFunctionObject *) func;
-    m->func_annotations = dict;
-    Py_INCREF(dict);
-}
-
-/* ArgTypeTest */
-        static int __Pyx__ArgTypeTest(PyObject *obj, PyTypeObject *type, const char *name, int exact)
-{
-    if (unlikely(!type)) {
-        PyErr_SetString(PyExc_SystemError, "Missing type object");
-        return 0;
-    }
-    else if (exact) {
-        #if PY_MAJOR_VERSION == 2
-        if ((type == &PyBaseString_Type) && likely(__Pyx_PyBaseString_CheckExact(obj))) return 1;
-        #endif
-    }
-    else {
-        if (likely(__Pyx_TypeCheck(obj, type))) return 1;
-    }
-    PyErr_Format(PyExc_TypeError,
-        "Argument '%.200s' has incorrect type (expected %.200s, got %.200s)",
-        name, type->tp_name, Py_TYPE(obj)->tp_name);
-    return 0;
-}
-
-/* ExtTypeTest */
-        static CYTHON_INLINE int __Pyx_TypeTest(PyObject *obj, PyTypeObject *type) {
-    if (unlikely(!type)) {
-        PyErr_SetString(PyExc_SystemError, "Missing type object");
-        return 0;
-    }
-    if (likely(__Pyx_TypeCheck(obj, type)))
-        return 1;
-    PyErr_Format(PyExc_TypeError, "Cannot convert %.200s to %.200s",
-                 Py_TYPE(obj)->tp_name, type->tp_name);
-    return 0;
-}
-
-/* pyfrozenset_new */
-        static CYTHON_INLINE PyObject* __Pyx_PyFrozenSet_New(PyObject* it) {
-    if (it) {
-        PyObject* result;
-#if CYTHON_COMPILING_IN_PYPY
-        PyObject* args;
-        args = PyTuple_Pack(1, it);
-        if (unlikely(!args))
-            return NULL;
-        result = PyObject_Call((PyObject*)&PyFrozenSet_Type, args, NULL);
-        Py_DECREF(args);
-        return result;
-#else
-        if (PyFrozenSet_CheckExact(it)) {
-            Py_INCREF(it);
-            return it;
-        }
-        result = PyFrozenSet_New(it);
-        if (unlikely(!result))
-            return NULL;
-        if (likely(PySet_GET_SIZE(result)))
-            return result;
-        Py_DECREF(result);
-#endif
-    }
-#if CYTHON_USE_TYPE_SLOTS
-    return PyFrozenSet_Type.tp_new(&PyFrozenSet_Type, __pyx_empty_tuple, NULL);
-#else
-    return PyObject_Call((PyObject*)&PyFrozenSet_Type, __pyx_empty_tuple, NULL);
-#endif
-}
-
-/* py_set_discard_unhashable */
-        static int __Pyx_PySet_DiscardUnhashable(PyObject *set, PyObject *key) {
-    PyObject *tmpkey;
-    int rv;
-    if (likely(!PySet_Check(key) || !PyErr_ExceptionMatches(PyExc_TypeError)))
-        return -1;
-    PyErr_Clear();
-    tmpkey = __Pyx_PyFrozenSet_New(key);
-    if (tmpkey == NULL)
-        return -1;
-    rv = PySet_Discard(set, tmpkey);
-    Py_DECREF(tmpkey);
-    return rv;
-}
-
-/* py_set_remove */
-        static int __Pyx_PySet_RemoveNotFound(PyObject *set, PyObject *key, int found) {
-    if (unlikely(found < 0)) {
-        found = __Pyx_PySet_DiscardUnhashable(set, key);
-    }
-    if (likely(found == 0)) {
-        PyObject *tup;
-        tup = PyTuple_Pack(1, key);
-        if (!tup)
-            return -1;
-        PyErr_SetObject(PyExc_KeyError, tup);
-        Py_DECREF(tup);
-        return -1;
-    }
-    return found;
-}
-static CYTHON_INLINE int __Pyx_PySet_Remove(PyObject *set, PyObject *key) {
-    int found = PySet_Discard(set, key);
-    if (unlikely(found != 1)) {
-        return __Pyx_PySet_RemoveNotFound(set, key, found);
-    }
-    return 0;
-}
-
-/* CIntToDigits */
-        static const char DIGIT_PAIRS_10[2*10*10+1] = {
-    "00010203040506070809"
-    "10111213141516171819"
-    "20212223242526272829"
-    "30313233343536373839"
-    "40414243444546474849"
-    "50515253545556575859"
-    "60616263646566676869"
-    "70717273747576777879"
-    "80818283848586878889"
-    "90919293949596979899"
-};
-static const char DIGIT_PAIRS_8[2*8*8+1] = {
-    "0001020304050607"
-    "1011121314151617"
-    "2021222324252627"
-    "3031323334353637"
-    "4041424344454647"
-    "5051525354555657"
-    "6061626364656667"
-    "7071727374757677"
-};
-static const char DIGITS_HEX[2*16+1] = {
-    "0123456789abcdef"
-    "0123456789ABCDEF"
-};
-
-/* BuildPyUnicode */
-        static PyObject* __Pyx_PyUnicode_BuildFromAscii(Py_ssize_t ulength, char* chars, int clength,
-                                                int prepend_sign, char padding_char) {
-    PyObject *uval;
-    Py_ssize_t uoffset = ulength - clength;
-#if CYTHON_USE_UNICODE_INTERNALS
-    Py_ssize_t i;
-#if CYTHON_PEP393_ENABLED
-    void *udata;
-    uval = PyUnicode_New(ulength, 127);
-    if (unlikely(!uval)) return NULL;
-    udata = PyUnicode_DATA(uval);
-#else
-    Py_UNICODE *udata;
-    uval = PyUnicode_FromUnicode(NULL, ulength);
-    if (unlikely(!uval)) return NULL;
-    udata = PyUnicode_AS_UNICODE(uval);
-#endif
-    if (uoffset > 0) {
-        i = 0;
-        if (prepend_sign) {
-            __Pyx_PyUnicode_WRITE(PyUnicode_1BYTE_KIND, udata, 0, '-');
-            i++;
-        }
-        for (; i < uoffset; i++) {
-            __Pyx_PyUnicode_WRITE(PyUnicode_1BYTE_KIND, udata, i, padding_char);
-        }
-    }
-    for (i=0; i < clength; i++) {
-        __Pyx_PyUnicode_WRITE(PyUnicode_1BYTE_KIND, udata, uoffset+i, chars[i]);
-    }
-#else
-    {
-        uval = NULL;
-        PyObject *sign = NULL, *padding = NULL;
-        if (uoffset > 0) {
-            prepend_sign = !!prepend_sign;
-            if (uoffset > prepend_sign) {
-                padding = PyUnicode_FromOrdinal(padding_char);
-                if (likely(padding) && uoffset > prepend_sign + 1) {
-                    PyObject *tmp;
-                    PyObject *repeat = PyInt_FromSize_t(uoffset - prepend_sign);
-                    if (unlikely(!repeat)) goto done_or_error;
-                    tmp = PyNumber_Multiply(padding, repeat);
-                    Py_DECREF(repeat);
-                    Py_DECREF(padding);
-                    padding = tmp;
-                }
-                if (unlikely(!padding)) goto done_or_error;
-            }
-            if (prepend_sign) {
-                sign = PyUnicode_FromOrdinal('-');
-                if (unlikely(!sign)) goto done_or_error;
-            }
-        }
-        uval = PyUnicode_DecodeASCII(chars, clength, NULL);
-        if (likely(uval) && padding) {
-            PyObject *tmp = PyNumber_Add(padding, uval);
-            Py_DECREF(uval);
-            uval = tmp;
-        }
-        if (likely(uval) && sign) {
-            PyObject *tmp = PyNumber_Add(sign, uval);
-            Py_DECREF(uval);
-            uval = tmp;
-        }
-done_or_error:
-        Py_XDECREF(padding);
-        Py_XDECREF(sign);
-    }
-#endif
-    return uval;
-}
-
-/* CIntToPyUnicode */
-        #ifdef _MSC_VER
-    #ifndef _MSC_STDINT_H_
-        #if _MSC_VER < 1300
-           typedef unsigned short    uint16_t;
-        #else
-           typedef unsigned __int16  uint16_t;
-        #endif
-    #endif
-#else
-   #include <stdint.h>
-#endif
-static CYTHON_INLINE PyObject* __Pyx_PyUnicode_From_Py_ssize_t(Py_ssize_t value, Py_ssize_t width, char padding_char, char format_char) {
-    char digits[sizeof(Py_ssize_t)*3+2];
-    char *dpos, *end = digits + sizeof(Py_ssize_t)*3+2;
-    const char *hex_digits = DIGITS_HEX;
-    Py_ssize_t length, ulength;
-    int prepend_sign, last_one_off;
-    Py_ssize_t remaining;
-    const Py_ssize_t neg_one = (Py_ssize_t) -1, const_zero = (Py_ssize_t) 0;
-    const int is_unsigned = neg_one > const_zero;
-    if (format_char == 'X') {
-        hex_digits += 16;
-        format_char = 'x';
-    }
-    remaining = value;
-    last_one_off = 0;
-    dpos = end;
-    do {
-        int digit_pos;
-        switch (format_char) {
-        case 'o':
-            digit_pos = abs((int)(remaining % (8*8)));
-            remaining = (Py_ssize_t) (remaining / (8*8));
-            dpos -= 2;
-            *(uint16_t*)dpos = ((uint16_t*)DIGIT_PAIRS_8)[digit_pos];
-            last_one_off = (digit_pos < 8);
-            break;
-        case 'd':
-            digit_pos = abs((int)(remaining % (10*10)));
-            remaining = (Py_ssize_t) (remaining / (10*10));
-            dpos -= 2;
-            *(uint16_t*)dpos = ((uint16_t*)DIGIT_PAIRS_10)[digit_pos];
-            last_one_off = (digit_pos < 10);
-            break;
-        case 'x':
-            *(--dpos) = hex_digits[abs((int)(remaining % 16))];
-            remaining = (Py_ssize_t) (remaining / 16);
-            break;
-        default:
-            assert(0);
-            break;
-        }
-    } while (unlikely(remaining != 0));
-    if (last_one_off) {
-        assert(*dpos == '0');
-        dpos++;
-    }
-    length = end - dpos;
-    ulength = length;
-    prepend_sign = 0;
-    if (!is_unsigned && value <= neg_one) {
-        if (padding_char == ' ' || width <= length + 1) {
-            *(--dpos) = '-';
-            ++length;
-        } else {
-            prepend_sign = 1;
-        }
-        ++ulength;
-    }
-    if (width > ulength) {
-        ulength = width;
-    }
-    if (ulength == 1) {
-        return PyUnicode_FromOrdinal(*dpos);
-    }
-    return __Pyx_PyUnicode_BuildFromAscii(ulength, dpos, (int) length, prepend_sign, padding_char);
-}
-
-/* JoinPyUnicode */
-        static PyObject* __Pyx_PyUnicode_Join(PyObject* value_tuple, Py_ssize_t value_count, Py_ssize_t result_ulength,
-                                      CYTHON_UNUSED Py_UCS4 max_char) {
-#if CYTHON_USE_UNICODE_INTERNALS && CYTHON_ASSUME_SAFE_MACROS && !CYTHON_AVOID_BORROWED_REFS
-    PyObject *result_uval;
-    int result_ukind;
-    Py_ssize_t i, char_pos;
-    void *result_udata;
-#if CYTHON_PEP393_ENABLED
-    result_uval = PyUnicode_New(result_ulength, max_char);
-    if (unlikely(!result_uval)) return NULL;
-    result_ukind = (max_char <= 255) ? PyUnicode_1BYTE_KIND : (max_char <= 65535) ? PyUnicode_2BYTE_KIND : PyUnicode_4BYTE_KIND;
-    result_udata = PyUnicode_DATA(result_uval);
-#else
-    result_uval = PyUnicode_FromUnicode(NULL, result_ulength);
-    if (unlikely(!result_uval)) return NULL;
-    result_ukind = sizeof(Py_UNICODE);
-    result_udata = PyUnicode_AS_UNICODE(result_uval);
-#endif
-    char_pos = 0;
-    for (i=0; i < value_count; i++) {
-        int ukind;
-        Py_ssize_t ulength;
-        void *udata;
-        PyObject *uval = PyTuple_GET_ITEM(value_tuple, i);
-        if (unlikely(__Pyx_PyUnicode_READY(uval)))
-            goto bad;
-        ulength = __Pyx_PyUnicode_GET_LENGTH(uval);
-        if (unlikely(!ulength))
-            continue;
-        if (unlikely(char_pos + ulength < 0))
-            goto overflow;
-        ukind = __Pyx_PyUnicode_KIND(uval);
-        udata = __Pyx_PyUnicode_DATA(uval);
-        if (!CYTHON_PEP393_ENABLED || ukind == result_ukind) {
-            memcpy((char *)result_udata + char_pos * result_ukind, udata, (size_t) (ulength * result_ukind));
-        } else {
-            #if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x030300F0 || defined(_PyUnicode_FastCopyCharacters)
-            _PyUnicode_FastCopyCharacters(result_uval, char_pos, uval, 0, ulength);
-            #else
-            Py_ssize_t j;
-            for (j=0; j < ulength; j++) {
-                Py_UCS4 uchar = __Pyx_PyUnicode_READ(ukind, udata, j);
-                __Pyx_PyUnicode_WRITE(result_ukind, result_udata, char_pos+j, uchar);
-            }
-            #endif
-        }
-        char_pos += ulength;
-    }
-    return result_uval;
-overflow:
-    PyErr_SetString(PyExc_OverflowError, "join() result is too long for a Python string");
-bad:
-    Py_DECREF(result_uval);
-    return NULL;
-#else
-    result_ulength++;
-    value_count++;
-    return PyUnicode_Join(__pyx_empty_unicode, value_tuple);
-#endif
-}
-
-/* PySetContains */
-        static int __Pyx_PySet_ContainsUnhashable(PyObject *set, PyObject *key) {
-    int result = -1;
-    if (PySet_Check(key) && PyErr_ExceptionMatches(PyExc_TypeError)) {
-        PyObject *tmpkey;
-        PyErr_Clear();
-        tmpkey = __Pyx_PyFrozenSet_New(key);
-        if (tmpkey != NULL) {
-            result = PySet_Contains(set, tmpkey);
-            Py_DECREF(tmpkey);
-        }
-    }
-    return result;
-}
-static CYTHON_INLINE int __Pyx_PySet_ContainsTF(PyObject* key, PyObject* set, int eq) {
-    int result = PySet_Contains(set, key);
-    if (unlikely(result < 0)) {
-        result = __Pyx_PySet_ContainsUnhashable(set, key);
-    }
-    return unlikely(result < 0) ? result : (result == (eq == Py_EQ));
-}
-
-/* PyObjectCallNoArg */
-        #if CYTHON_COMPILING_IN_CPYTHON
-static CYTHON_INLINE PyObject* __Pyx_PyObject_CallNoArg(PyObject *func) {
-#if CYTHON_FAST_PYCALL
-    if (PyFunction_Check(func)) {
-        return __Pyx_PyFunction_FastCall(func, NULL, 0);
-    }
-#endif
-#ifdef __Pyx_CyFunction_USED
-    if (likely(PyCFunction_Check(func) || __Pyx_TypeCheck(func, __pyx_CyFunctionType))) {
-#else
-    if (likely(PyCFunction_Check(func))) {
-#endif
-        if (likely(PyCFunction_GET_FLAGS(func) & METH_NOARGS)) {
-            return __Pyx_PyObject_CallMethO(func, NULL);
-        }
-    }
-    return __Pyx_PyObject_Call(func, __pyx_empty_tuple, NULL);
-}
-#endif
-
-/* RaiseTooManyValuesToUnpack */
-          static CYTHON_INLINE void __Pyx_RaiseTooManyValuesError(Py_ssize_t expected) {
-    PyErr_Format(PyExc_ValueError,
-                 "too many values to unpack (expected %" CYTHON_FORMAT_SSIZE_T "d)", expected);
-}
-
-/* RaiseNeedMoreValuesToUnpack */
-          static CYTHON_INLINE void __Pyx_RaiseNeedMoreValuesError(Py_ssize_t index) {
-    PyErr_Format(PyExc_ValueError,
-                 "need more than %" CYTHON_FORMAT_SSIZE_T "d value%.1s to unpack",
-                 index, (index == 1) ? "" : "s");
-}
-
-/* IterFinish */
-          static CYTHON_INLINE int __Pyx_IterFinish(void) {
-#if CYTHON_FAST_THREAD_STATE
-    PyThreadState *tstate = __Pyx_PyThreadState_Current;
-    PyObject* exc_type = tstate->curexc_type;
-    if (unlikely(exc_type)) {
-        if (likely(__Pyx_PyErr_GivenExceptionMatches(exc_type, PyExc_StopIteration))) {
-            PyObject *exc_value, *exc_tb;
-            exc_value = tstate->curexc_value;
-            exc_tb = tstate->curexc_traceback;
-            tstate->curexc_type = 0;
-            tstate->curexc_value = 0;
-            tstate->curexc_traceback = 0;
-            Py_DECREF(exc_type);
-            Py_XDECREF(exc_value);
-            Py_XDECREF(exc_tb);
-            return 0;
-        } else {
-            return -1;
-        }
-    }
-    return 0;
-#else
-    if (unlikely(PyErr_Occurred())) {
-        if (likely(PyErr_ExceptionMatches(PyExc_StopIteration))) {
-            PyErr_Clear();
-            return 0;
-        } else {
-            return -1;
-        }
-    }
-    return 0;
-#endif
-}
-
-/* UnpackItemEndCheck */
-          static int __Pyx_IternextUnpackEndCheck(PyObject *retval, Py_ssize_t expected) {
-    if (unlikely(retval)) {
-        Py_DECREF(retval);
-        __Pyx_RaiseTooManyValuesError(expected);
-        return -1;
-    } else {
-        return __Pyx_IterFinish();
-    }
-    return 0;
-}
-
-/* set_iter */
-          static CYTHON_INLINE PyObject* __Pyx_set_iterator(PyObject* iterable, int is_set,
-                                                  Py_ssize_t* p_orig_length, int* p_source_is_set) {
-#if CYTHON_COMPILING_IN_CPYTHON
-    is_set = is_set || likely(PySet_CheckExact(iterable) || PyFrozenSet_CheckExact(iterable));
-    *p_source_is_set = is_set;
-    if (likely(is_set)) {
-        *p_orig_length = PySet_Size(iterable);
-        Py_INCREF(iterable);
-        return iterable;
-    }
-#else
-    (void)is_set;
-    *p_source_is_set = 0;
-#endif
-    *p_orig_length = 0;
-    return PyObject_GetIter(iterable);
-}
-static CYTHON_INLINE int __Pyx_set_iter_next(
-        PyObject* iter_obj, Py_ssize_t orig_length,
-        Py_ssize_t* ppos, PyObject **value,
-        int source_is_set) {
-    if (!CYTHON_COMPILING_IN_CPYTHON || unlikely(!source_is_set)) {
-        *value = PyIter_Next(iter_obj);
-        if (unlikely(!*value)) {
-            return __Pyx_IterFinish();
-        }
-        (void)orig_length;
-        (void)ppos;
-        return 1;
-    }
-#if CYTHON_COMPILING_IN_CPYTHON
-    if (unlikely(PySet_GET_SIZE(iter_obj) != orig_length)) {
-        PyErr_SetString(
-            PyExc_RuntimeError,
-            "set changed size during iteration");
-        return -1;
-    }
-    {
-        Py_hash_t hash;
-        int ret = _PySet_NextEntry(iter_obj, ppos, value, &hash);
-        assert (ret != -1);
-        if (likely(ret)) {
-            Py_INCREF(*value);
-            return 1;
-        }
-    }
-#endif
-    return 0;
-}
-
-/* GetItemInt */
-          static PyObject *__Pyx_GetItemInt_Generic(PyObject *o, PyObject* j) {
-    PyObject *r;
-    if (!j) return NULL;
-    r = PyObject_GetItem(o, j);
-    Py_DECREF(j);
-    return r;
-}
-static CYTHON_INLINE PyObject *__Pyx_GetItemInt_List_Fast(PyObject *o, Py_ssize_t i,
-                                                              CYTHON_NCP_UNUSED int wraparound,
-                                                              CYTHON_NCP_UNUSED int boundscheck) {
-#if CYTHON_ASSUME_SAFE_MACROS && !CYTHON_AVOID_BORROWED_REFS
-    Py_ssize_t wrapped_i = i;
-    if (wraparound & unlikely(i < 0)) {
-        wrapped_i += PyList_GET_SIZE(o);
-    }
-    if ((!boundscheck) || likely((0 <= wrapped_i) & (wrapped_i < PyList_GET_SIZE(o)))) {
-        PyObject *r = PyList_GET_ITEM(o, wrapped_i);
-        Py_INCREF(r);
-        return r;
-    }
-    return __Pyx_GetItemInt_Generic(o, PyInt_FromSsize_t(i));
-#else
-    return PySequence_GetItem(o, i);
-#endif
-}
-static CYTHON_INLINE PyObject *__Pyx_GetItemInt_Tuple_Fast(PyObject *o, Py_ssize_t i,
-                                                              CYTHON_NCP_UNUSED int wraparound,
-                                                              CYTHON_NCP_UNUSED int boundscheck) {
-#if CYTHON_ASSUME_SAFE_MACROS && !CYTHON_AVOID_BORROWED_REFS
-    Py_ssize_t wrapped_i = i;
-    if (wraparound & unlikely(i < 0)) {
-        wrapped_i += PyTuple_GET_SIZE(o);
-    }
-    if ((!boundscheck) || likely((0 <= wrapped_i) & (wrapped_i < PyTuple_GET_SIZE(o)))) {
-        PyObject *r = PyTuple_GET_ITEM(o, wrapped_i);
-        Py_INCREF(r);
-        return r;
-    }
-    return __Pyx_GetItemInt_Generic(o, PyInt_FromSsize_t(i));
-#else
-    return PySequence_GetItem(o, i);
-#endif
-}
-static CYTHON_INLINE PyObject *__Pyx_GetItemInt_Fast(PyObject *o, Py_ssize_t i, int is_list,
-                                                     CYTHON_NCP_UNUSED int wraparound,
-                                                     CYTHON_NCP_UNUSED int boundscheck) {
-#if CYTHON_ASSUME_SAFE_MACROS && !CYTHON_AVOID_BORROWED_REFS && CYTHON_USE_TYPE_SLOTS
-    if (is_list || PyList_CheckExact(o)) {
-        Py_ssize_t n = ((!wraparound) | likely(i >= 0)) ? i : i + PyList_GET_SIZE(o);
-        if ((!boundscheck) || (likely((n >= 0) & (n < PyList_GET_SIZE(o))))) {
-            PyObject *r = PyList_GET_ITEM(o, n);
-            Py_INCREF(r);
-            return r;
-        }
-    }
-    else if (PyTuple_CheckExact(o)) {
-        Py_ssize_t n = ((!wraparound) | likely(i >= 0)) ? i : i + PyTuple_GET_SIZE(o);
-        if ((!boundscheck) || likely((n >= 0) & (n < PyTuple_GET_SIZE(o)))) {
-            PyObject *r = PyTuple_GET_ITEM(o, n);
-            Py_INCREF(r);
-            return r;
-        }
-    } else {
-        PySequenceMethods *m = Py_TYPE(o)->tp_as_sequence;
-        if (likely(m && m->sq_item)) {
-            if (wraparound && unlikely(i < 0) && likely(m->sq_length)) {
-                Py_ssize_t l = m->sq_length(o);
-                if (likely(l >= 0)) {
-                    i += l;
-                } else {
-                    if (!PyErr_ExceptionMatches(PyExc_OverflowError))
-                        return NULL;
-                    PyErr_Clear();
-                }
-            }
-            return m->sq_item(o, i);
-        }
-    }
-#else
-    if (is_list || PySequence_Check(o)) {
-        return PySequence_GetItem(o, i);
-    }
-#endif
-    return __Pyx_GetItemInt_Generic(o, PyInt_FromSsize_t(i));
-}
-
-/* ObjectGetItem */
-          #if CYTHON_USE_TYPE_SLOTS
-static PyObject *__Pyx_PyObject_GetIndex(PyObject *obj, PyObject* index) {
-    PyObject *runerr;
-    Py_ssize_t key_value;
-    PySequenceMethods *m = Py_TYPE(obj)->tp_as_sequence;
-    if (unlikely(!(m && m->sq_item))) {
-        PyErr_Format(PyExc_TypeError, "'%.200s' object is not subscriptable", Py_TYPE(obj)->tp_name);
-        return NULL;
-    }
-    key_value = __Pyx_PyIndex_AsSsize_t(index);
-    if (likely(key_value != -1 || !(runerr = PyErr_Occurred()))) {
-        return __Pyx_GetItemInt_Fast(obj, key_value, 0, 1, 1);
-    }
-    if (PyErr_GivenExceptionMatches(runerr, PyExc_OverflowError)) {
-        PyErr_Clear();
-        PyErr_Format(PyExc_IndexError, "cannot fit '%.200s' into an index-sized integer", Py_TYPE(index)->tp_name);
-    }
-    return NULL;
-}
-static PyObject *__Pyx_PyObject_GetItem(PyObject *obj, PyObject* key) {
-    PyMappingMethods *m = Py_TYPE(obj)->tp_as_mapping;
-    if (likely(m && m->mp_subscript)) {
-        return m->mp_subscript(obj, key);
-    }
-    return __Pyx_PyObject_GetIndex(obj, key);
-}
-#endif
-
-/* PyErrExceptionMatches */
-          #if CYTHON_FAST_THREAD_STATE
-static int __Pyx_PyErr_ExceptionMatchesTuple(PyObject *exc_type, PyObject *tuple) {
-    Py_ssize_t i, n;
-    n = PyTuple_GET_SIZE(tuple);
-#if PY_MAJOR_VERSION >= 3
-    for (i=0; i<n; i++) {
-        if (exc_type == PyTuple_GET_ITEM(tuple, i)) return 1;
-    }
-#endif
-    for (i=0; i<n; i++) {
-        if (__Pyx_PyErr_GivenExceptionMatches(exc_type, PyTuple_GET_ITEM(tuple, i))) return 1;
-    }
-    return 0;
-}
-static CYTHON_INLINE int __Pyx_PyErr_ExceptionMatchesInState(PyThreadState* tstate, PyObject* err) {
-    PyObject *exc_type = tstate->curexc_type;
-    if (exc_type == err) return 1;
-    if (unlikely(!exc_type)) return 0;
-    if (unlikely(PyTuple_Check(err)))
-        return __Pyx_PyErr_ExceptionMatchesTuple(exc_type, err);
-    return __Pyx_PyErr_GivenExceptionMatches(exc_type, err);
-}
-#endif
-
-/* GetAttr */
-          static CYTHON_INLINE PyObject *__Pyx_GetAttr(PyObject *o, PyObject *n) {
-#if CYTHON_USE_TYPE_SLOTS
-#if PY_MAJOR_VERSION >= 3
-    if (likely(PyUnicode_Check(n)))
-#else
-    if (likely(PyString_Check(n)))
-#endif
-        return __Pyx_PyObject_GetAttrStr(o, n);
-#endif
-    return PyObject_GetAttr(o, n);
-}
-
-/* GetAttr3 */
-          static PyObject *__Pyx_GetAttr3Default(PyObject *d) {
-    __Pyx_PyThreadState_declare
-    __Pyx_PyThreadState_assign
-    if (unlikely(!__Pyx_PyErr_ExceptionMatches(PyExc_AttributeError)))
-        return NULL;
-    __Pyx_PyErr_Clear();
-    Py_INCREF(d);
-    return d;
-}
-static CYTHON_INLINE PyObject *__Pyx_GetAttr3(PyObject *o, PyObject *n, PyObject *d) {
-    PyObject *r = __Pyx_GetAttr(o, n);
-    return (likely(r)) ? r : __Pyx_GetAttr3Default(d);
-}
-
-/* DictGetItem */
-          #if PY_MAJOR_VERSION >= 3 && !CYTHON_COMPILING_IN_PYPY
-static PyObject *__Pyx_PyDict_GetItem(PyObject *d, PyObject* key) {
-    PyObject *value;
-    value = PyDict_GetItemWithError(d, key);
-    if (unlikely(!value)) {
-        if (!PyErr_Occurred()) {
-            PyObject* args = PyTuple_Pack(1, key);
-            if (likely(args))
-                PyErr_SetObject(PyExc_KeyError, args);
-            Py_XDECREF(args);
-        }
-        return NULL;
-    }
-    Py_INCREF(value);
-    return value;
-}
-#endif
-
-/* SaveResetException */
-          #if CYTHON_FAST_THREAD_STATE
-static CYTHON_INLINE void __Pyx__ExceptionSave(PyThreadState *tstate, PyObject **type, PyObject **value, PyObject **tb) {
-    #if PY_VERSION_HEX >= 0x030700A3
-    *type = tstate->exc_state.exc_type;
-    *value = tstate->exc_state.exc_value;
-    *tb = tstate->exc_state.exc_traceback;
-    #else
-    *type = tstate->exc_type;
-    *value = tstate->exc_value;
-    *tb = tstate->exc_traceback;
-    #endif
-    Py_XINCREF(*type);
-    Py_XINCREF(*value);
-    Py_XINCREF(*tb);
-}
-static CYTHON_INLINE void __Pyx__ExceptionReset(PyThreadState *tstate, PyObject *type, PyObject *value, PyObject *tb) {
-    PyObject *tmp_type, *tmp_value, *tmp_tb;
-    #if PY_VERSION_HEX >= 0x030700A3
-    tmp_type = tstate->exc_state.exc_type;
-    tmp_value = tstate->exc_state.exc_value;
-    tmp_tb = tstate->exc_state.exc_traceback;
-    tstate->exc_state.exc_type = type;
-    tstate->exc_state.exc_value = value;
-    tstate->exc_state.exc_traceback = tb;
-    #else
-    tmp_type = tstate->exc_type;
-    tmp_value = tstate->exc_value;
-    tmp_tb = tstate->exc_traceback;
-    tstate->exc_type = type;
-    tstate->exc_value = value;
-    tstate->exc_traceback = tb;
-    #endif
-    Py_XDECREF(tmp_type);
-    Py_XDECREF(tmp_value);
-    Py_XDECREF(tmp_tb);
-}
-#endif
-
-/* FastTypeChecks */
-          #if CYTHON_COMPILING_IN_CPYTHON
-static int __Pyx_InBases(PyTypeObject *a, PyTypeObject *b) {
-    while (a) {
-        a = a->tp_base;
-        if (a == b)
-            return 1;
-    }
-    return b == &PyBaseObject_Type;
-}
-static CYTHON_INLINE int __Pyx_IsSubtype(PyTypeObject *a, PyTypeObject *b) {
-    PyObject *mro;
-    if (a == b) return 1;
-    mro = a->tp_mro;
-    if (likely(mro)) {
-        Py_ssize_t i, n;
-        n = PyTuple_GET_SIZE(mro);
-        for (i = 0; i < n; i++) {
-            if (PyTuple_GET_ITEM(mro, i) == (PyObject *)b)
-                return 1;
-        }
-        return 0;
-    }
-    return __Pyx_InBases(a, b);
-}
-#if PY_MAJOR_VERSION == 2
-static int __Pyx_inner_PyErr_GivenExceptionMatches2(PyObject *err, PyObject* exc_type1, PyObject* exc_type2) {
-    PyObject *exception, *value, *tb;
-    int res;
-    __Pyx_PyThreadState_declare
-    __Pyx_PyThreadState_assign
-    __Pyx_ErrFetch(&exception, &value, &tb);
-    res = exc_type1 ? PyObject_IsSubclass(err, exc_type1) : 0;
-    if (unlikely(res == -1)) {
-        PyErr_WriteUnraisable(err);
-        res = 0;
-    }
-    if (!res) {
-        res = PyObject_IsSubclass(err, exc_type2);
-        if (unlikely(res == -1)) {
-            PyErr_WriteUnraisable(err);
-            res = 0;
-        }
-    }
-    __Pyx_ErrRestore(exception, value, tb);
-    return res;
-}
-#else
-static CYTHON_INLINE int __Pyx_inner_PyErr_GivenExceptionMatches2(PyObject *err, PyObject* exc_type1, PyObject *exc_type2) {
-    int res = exc_type1 ? __Pyx_IsSubtype((PyTypeObject*)err, (PyTypeObject*)exc_type1) : 0;
-    if (!res) {
-        res = __Pyx_IsSubtype((PyTypeObject*)err, (PyTypeObject*)exc_type2);
-    }
-    return res;
-}
-#endif
-static int __Pyx_PyErr_GivenExceptionMatchesTuple(PyObject *exc_type, PyObject *tuple) {
-    Py_ssize_t i, n;
-    assert(PyExceptionClass_Check(exc_type));
-    n = PyTuple_GET_SIZE(tuple);
-#if PY_MAJOR_VERSION >= 3
-    for (i=0; i<n; i++) {
-        if (exc_type == PyTuple_GET_ITEM(tuple, i)) return 1;
-    }
-#endif
-    for (i=0; i<n; i++) {
-        PyObject *t = PyTuple_GET_ITEM(tuple, i);
-        #if PY_MAJOR_VERSION < 3
-        if (likely(exc_type == t)) return 1;
-        #endif
-        if (likely(PyExceptionClass_Check(t))) {
-            if (__Pyx_inner_PyErr_GivenExceptionMatches2(exc_type, NULL, t)) return 1;
-        } else {
-        }
-    }
-    return 0;
-}
-static CYTHON_INLINE int __Pyx_PyErr_GivenExceptionMatches(PyObject *err, PyObject* exc_type) {
-    if (likely(err == exc_type)) return 1;
-    if (likely(PyExceptionClass_Check(err))) {
-        if (likely(PyExceptionClass_Check(exc_type))) {
-            return __Pyx_inner_PyErr_GivenExceptionMatches2(err, NULL, exc_type);
-        } else if (likely(PyTuple_Check(exc_type))) {
-            return __Pyx_PyErr_GivenExceptionMatchesTuple(err, exc_type);
-        } else {
-        }
-    }
-    return PyErr_GivenExceptionMatches(err, exc_type);
-}
-static CYTHON_INLINE int __Pyx_PyErr_GivenExceptionMatches2(PyObject *err, PyObject *exc_type1, PyObject *exc_type2) {
-    assert(PyExceptionClass_Check(exc_type1));
-    assert(PyExceptionClass_Check(exc_type2));
-    if (likely(err == exc_type1 || err == exc_type2)) return 1;
-    if (likely(PyExceptionClass_Check(err))) {
-        return __Pyx_inner_PyErr_GivenExceptionMatches2(err, exc_type1, exc_type2);
-    }
-    return (PyErr_GivenExceptionMatches(err, exc_type1) || PyErr_GivenExceptionMatches(err, exc_type2));
-}
-#endif
-
-/* GetException */
-          #if CYTHON_FAST_THREAD_STATE
-static int __Pyx__GetException(PyThreadState *tstate, PyObject **type, PyObject **value, PyObject **tb) {
-#else
-static int __Pyx_GetException(PyObject **type, PyObject **value, PyObject **tb) {
-#endif
-    PyObject *local_type, *local_value, *local_tb;
-#if CYTHON_FAST_THREAD_STATE
-    PyObject *tmp_type, *tmp_value, *tmp_tb;
-    local_type = tstate->curexc_type;
-    local_value = tstate->curexc_value;
-    local_tb = tstate->curexc_traceback;
-    tstate->curexc_type = 0;
-    tstate->curexc_value = 0;
-    tstate->curexc_traceback = 0;
-#else
-    PyErr_Fetch(&local_type, &local_value, &local_tb);
-#endif
-    PyErr_NormalizeException(&local_type, &local_value, &local_tb);
-#if CYTHON_FAST_THREAD_STATE
-    if (unlikely(tstate->curexc_type))
-#else
-    if (unlikely(PyErr_Occurred()))
-#endif
-        goto bad;
-    #if PY_MAJOR_VERSION >= 3
-    if (local_tb) {
-        if (unlikely(PyException_SetTraceback(local_value, local_tb) < 0))
-            goto bad;
-    }
-    #endif
-    Py_XINCREF(local_tb);
-    Py_XINCREF(local_type);
-    Py_XINCREF(local_value);
-    *type = local_type;
-    *value = local_value;
-    *tb = local_tb;
-#if CYTHON_FAST_THREAD_STATE
-    #if PY_VERSION_HEX >= 0x030700A3
-    tmp_type = tstate->exc_state.exc_type;
-    tmp_value = tstate->exc_state.exc_value;
-    tmp_tb = tstate->exc_state.exc_traceback;
-    tstate->exc_state.exc_type = local_type;
-    tstate->exc_state.exc_value = local_value;
-    tstate->exc_state.exc_traceback = local_tb;
-    #else
-    tmp_type = tstate->exc_type;
-    tmp_value = tstate->exc_value;
-    tmp_tb = tstate->exc_traceback;
-    tstate->exc_type = local_type;
-    tstate->exc_value = local_value;
-    tstate->exc_traceback = local_tb;
-    #endif
-    Py_XDECREF(tmp_type);
-    Py_XDECREF(tmp_value);
-    Py_XDECREF(tmp_tb);
-#else
-    PyErr_SetExcInfo(local_type, local_value, local_tb);
-#endif
-    return 0;
-bad:
-    *type = 0;
-    *value = 0;
-    *tb = 0;
-    Py_XDECREF(local_type);
-    Py_XDECREF(local_value);
-    Py_XDECREF(local_tb);
-    return -1;
-}
-
-/* SwapException */
-            #if CYTHON_FAST_THREAD_STATE
-static CYTHON_INLINE void __Pyx__ExceptionSwap(PyThreadState *tstate, PyObject **type, PyObject **value, PyObject **tb) {
-    PyObject *tmp_type, *tmp_value, *tmp_tb;
-    #if PY_VERSION_HEX >= 0x030700A3
-    tmp_type = tstate->exc_state.exc_type;
-    tmp_value = tstate->exc_state.exc_value;
-    tmp_tb = tstate->exc_state.exc_traceback;
-    tstate->exc_state.exc_type = *type;
-    tstate->exc_state.exc_value = *value;
-    tstate->exc_state.exc_traceback = *tb;
-    #else
-    tmp_type = tstate->exc_type;
-    tmp_value = tstate->exc_value;
-    tmp_tb = tstate->exc_traceback;
-    tstate->exc_type = *type;
-    tstate->exc_value = *value;
-    tstate->exc_traceback = *tb;
-    #endif
-    *type = tmp_type;
-    *value = tmp_value;
-    *tb = tmp_tb;
-}
-#else
-static CYTHON_INLINE void __Pyx_ExceptionSwap(PyObject **type, PyObject **value, PyObject **tb) {
-    PyObject *tmp_type, *tmp_value, *tmp_tb;
-    PyErr_GetExcInfo(&tmp_type, &tmp_value, &tmp_tb);
-    PyErr_SetExcInfo(*type, *value, *tb);
-    *type = tmp_type;
-    *value = tmp_value;
-    *tb = tmp_tb;
-}
-#endif
-
-/* BytesEquals */
-            static CYTHON_INLINE int __Pyx_PyBytes_Equals(PyObject* s1, PyObject* s2, int equals) {
-#if CYTHON_COMPILING_IN_PYPY
-    return PyObject_RichCompareBool(s1, s2, equals);
-#else
-    if (s1 == s2) {
-        return (equals == Py_EQ);
-    } else if (PyBytes_CheckExact(s1) & PyBytes_CheckExact(s2)) {
-        const char *ps1, *ps2;
-        Py_ssize_t length = PyBytes_GET_SIZE(s1);
-        if (length != PyBytes_GET_SIZE(s2))
-            return (equals == Py_NE);
-        ps1 = PyBytes_AS_STRING(s1);
-        ps2 = PyBytes_AS_STRING(s2);
-        if (ps1[0] != ps2[0]) {
-            return (equals == Py_NE);
-        } else if (length == 1) {
-            return (equals == Py_EQ);
-        } else {
-            int result;
-#if CYTHON_USE_UNICODE_INTERNALS
-            Py_hash_t hash1, hash2;
-            hash1 = ((PyBytesObject*)s1)->ob_shash;
-            hash2 = ((PyBytesObject*)s2)->ob_shash;
-            if (hash1 != hash2 && hash1 != -1 && hash2 != -1) {
-                return (equals == Py_NE);
-            }
-#endif
-            result = memcmp(ps1, ps2, (size_t)length);
-            return (equals == Py_EQ) ? (result == 0) : (result != 0);
-        }
-    } else if ((s1 == Py_None) & PyBytes_CheckExact(s2)) {
-        return (equals == Py_NE);
-    } else if ((s2 == Py_None) & PyBytes_CheckExact(s1)) {
-        return (equals == Py_NE);
-    } else {
-        int result;
-        PyObject* py_result = PyObject_RichCompare(s1, s2, equals);
-        if (!py_result)
-            return -1;
-        result = __Pyx_PyObject_IsTrue(py_result);
-        Py_DECREF(py_result);
-        return result;
-    }
-#endif
-}
-
-/* UnicodeEquals */
-            static CYTHON_INLINE int __Pyx_PyUnicode_Equals(PyObject* s1, PyObject* s2, int equals) {
-#if CYTHON_COMPILING_IN_PYPY
-    return PyObject_RichCompareBool(s1, s2, equals);
-#else
-#if PY_MAJOR_VERSION < 3
-    PyObject* owned_ref = NULL;
-#endif
-    int s1_is_unicode, s2_is_unicode;
-    if (s1 == s2) {
-        goto return_eq;
-    }
-    s1_is_unicode = PyUnicode_CheckExact(s1);
-    s2_is_unicode = PyUnicode_CheckExact(s2);
-#if PY_MAJOR_VERSION < 3
-    if ((s1_is_unicode & (!s2_is_unicode)) && PyString_CheckExact(s2)) {
-        owned_ref = PyUnicode_FromObject(s2);
-        if (unlikely(!owned_ref))
-            return -1;
-        s2 = owned_ref;
-        s2_is_unicode = 1;
-    } else if ((s2_is_unicode & (!s1_is_unicode)) && PyString_CheckExact(s1)) {
-        owned_ref = PyUnicode_FromObject(s1);
-        if (unlikely(!owned_ref))
-            return -1;
-        s1 = owned_ref;
-        s1_is_unicode = 1;
-    } else if (((!s2_is_unicode) & (!s1_is_unicode))) {
-        return __Pyx_PyBytes_Equals(s1, s2, equals);
-    }
-#endif
-    if (s1_is_unicode & s2_is_unicode) {
-        Py_ssize_t length;
-        int kind;
-        void *data1, *data2;
-        if (unlikely(__Pyx_PyUnicode_READY(s1) < 0) || unlikely(__Pyx_PyUnicode_READY(s2) < 0))
-            return -1;
-        length = __Pyx_PyUnicode_GET_LENGTH(s1);
-        if (length != __Pyx_PyUnicode_GET_LENGTH(s2)) {
-            goto return_ne;
-        }
-#if CYTHON_USE_UNICODE_INTERNALS
-        {
-            Py_hash_t hash1, hash2;
-        #if CYTHON_PEP393_ENABLED
-            hash1 = ((PyASCIIObject*)s1)->hash;
-            hash2 = ((PyASCIIObject*)s2)->hash;
-        #else
-            hash1 = ((PyUnicodeObject*)s1)->hash;
-            hash2 = ((PyUnicodeObject*)s2)->hash;
-        #endif
-            if (hash1 != hash2 && hash1 != -1 && hash2 != -1) {
-                goto return_ne;
-            }
-        }
-#endif
-        kind = __Pyx_PyUnicode_KIND(s1);
-        if (kind != __Pyx_PyUnicode_KIND(s2)) {
-            goto return_ne;
-        }
-        data1 = __Pyx_PyUnicode_DATA(s1);
-        data2 = __Pyx_PyUnicode_DATA(s2);
-        if (__Pyx_PyUnicode_READ(kind, data1, 0) != __Pyx_PyUnicode_READ(kind, data2, 0)) {
-            goto return_ne;
-        } else if (length == 1) {
-            goto return_eq;
-        } else {
-            int result = memcmp(data1, data2, (size_t)(length * kind));
-            #if PY_MAJOR_VERSION < 3
-            Py_XDECREF(owned_ref);
-            #endif
-            return (equals == Py_EQ) ? (result == 0) : (result != 0);
-        }
-    } else if ((s1 == Py_None) & s2_is_unicode) {
-        goto return_ne;
-    } else if ((s2 == Py_None) & s1_is_unicode) {
-        goto return_ne;
-    } else {
-        int result;
-        PyObject* py_result = PyObject_RichCompare(s1, s2, equals);
-        if (!py_result)
-            return -1;
-        result = __Pyx_PyObject_IsTrue(py_result);
-        Py_DECREF(py_result);
-        return result;
-    }
-return_eq:
-    #if PY_MAJOR_VERSION < 3
-    Py_XDECREF(owned_ref);
-    #endif
-    return (equals == Py_EQ);
-return_ne:
-    #if PY_MAJOR_VERSION < 3
-    Py_XDECREF(owned_ref);
-    #endif
-    return (equals == Py_NE);
-#endif
-}
-
-/* CIntToPyUnicode */
-            #ifdef _MSC_VER
-    #ifndef _MSC_STDINT_H_
-        #if _MSC_VER < 1300
-           typedef unsigned short    uint16_t;
-        #else
-           typedef unsigned __int16  uint16_t;
-        #endif
-    #endif
-#else
-   #include <stdint.h>
-#endif
-static CYTHON_INLINE PyObject* __Pyx_PyUnicode_From_size_t(size_t value, Py_ssize_t width, char padding_char, char format_char) {
-    char digits[sizeof(size_t)*3+2];
-    char *dpos, *end = digits + sizeof(size_t)*3+2;
-    const char *hex_digits = DIGITS_HEX;
-    Py_ssize_t length, ulength;
-    int prepend_sign, last_one_off;
-    size_t remaining;
-    const size_t neg_one = (size_t) -1, const_zero = (size_t) 0;
-    const int is_unsigned = neg_one > const_zero;
-    if (format_char == 'X') {
-        hex_digits += 16;
-        format_char = 'x';
-    }
-    remaining = value;
-    last_one_off = 0;
-    dpos = end;
-    do {
-        int digit_pos;
-        switch (format_char) {
-        case 'o':
-            digit_pos = abs((int)(remaining % (8*8)));
-            remaining = (size_t) (remaining / (8*8));
-            dpos -= 2;
-            *(uint16_t*)dpos = ((uint16_t*)DIGIT_PAIRS_8)[digit_pos];
-            last_one_off = (digit_pos < 8);
-            break;
-        case 'd':
-            digit_pos = abs((int)(remaining % (10*10)));
-            remaining = (size_t) (remaining / (10*10));
-            dpos -= 2;
-            *(uint16_t*)dpos = ((uint16_t*)DIGIT_PAIRS_10)[digit_pos];
-            last_one_off = (digit_pos < 10);
-            break;
-        case 'x':
-            *(--dpos) = hex_digits[abs((int)(remaining % 16))];
-            remaining = (size_t) (remaining / 16);
-            break;
-        default:
-            assert(0);
-            break;
-        }
-    } while (unlikely(remaining != 0));
-    if (last_one_off) {
-        assert(*dpos == '0');
-        dpos++;
-    }
-    length = end - dpos;
-    ulength = length;
-    prepend_sign = 0;
-    if (!is_unsigned && value <= neg_one) {
-        if (padding_char == ' ' || width <= length + 1) {
-            *(--dpos) = '-';
-            ++length;
-        } else {
-            prepend_sign = 1;
-        }
-        ++ulength;
-    }
-    if (width > ulength) {
-        ulength = width;
-    }
-    if (ulength == 1) {
-        return PyUnicode_FromOrdinal(*dpos);
-    }
-    return __Pyx_PyUnicode_BuildFromAscii(ulength, dpos, (int) length, prepend_sign, padding_char);
-}
-
-/* RaiseNoneIterError */
-            static CYTHON_INLINE void __Pyx_RaiseNoneNotIterableError(void) {
-    PyErr_SetString(PyExc_TypeError, "'NoneType' object is not iterable");
-}
-
-/* CIntToPyUnicode */
-            #ifdef _MSC_VER
-    #ifndef _MSC_STDINT_H_
-        #if _MSC_VER < 1300
-           typedef unsigned short    uint16_t;
-        #else
-           typedef unsigned __int16  uint16_t;
-        #endif
-    #endif
-#else
-   #include <stdint.h>
-#endif
-static CYTHON_INLINE PyObject* __Pyx_PyUnicode_From_unsigned_char(unsigned char value, Py_ssize_t width, char padding_char, char format_char) {
-    char digits[sizeof(unsigned char)*3+2];
-    char *dpos, *end = digits + sizeof(unsigned char)*3+2;
-    const char *hex_digits = DIGITS_HEX;
-    Py_ssize_t length, ulength;
-    int prepend_sign, last_one_off;
-    unsigned char remaining;
-    const unsigned char neg_one = (unsigned char) -1, const_zero = (unsigned char) 0;
-    const int is_unsigned = neg_one > const_zero;
-    if (format_char == 'X') {
-        hex_digits += 16;
-        format_char = 'x';
-    }
-    remaining = value;
-    last_one_off = 0;
-    dpos = end;
-    do {
-        int digit_pos;
-        switch (format_char) {
-        case 'o':
-            digit_pos = abs((int)(remaining % (8*8)));
-            remaining = (unsigned char) (remaining / (8*8));
-            dpos -= 2;
-            *(uint16_t*)dpos = ((uint16_t*)DIGIT_PAIRS_8)[digit_pos];
-            last_one_off = (digit_pos < 8);
-            break;
-        case 'd':
-            digit_pos = abs((int)(remaining % (10*10)));
-            remaining = (unsigned char) (remaining / (10*10));
-            dpos -= 2;
-            *(uint16_t*)dpos = ((uint16_t*)DIGIT_PAIRS_10)[digit_pos];
-            last_one_off = (digit_pos < 10);
-            break;
-        case 'x':
-            *(--dpos) = hex_digits[abs((int)(remaining % 16))];
-            remaining = (unsigned char) (remaining / 16);
-            break;
-        default:
-            assert(0);
-            break;
-        }
-    } while (unlikely(remaining != 0));
-    if (last_one_off) {
-        assert(*dpos == '0');
-        dpos++;
-    }
-    length = end - dpos;
-    ulength = length;
-    prepend_sign = 0;
-    if (!is_unsigned && value <= neg_one) {
-        if (padding_char == ' ' || width <= length + 1) {
-            *(--dpos) = '-';
-            ++length;
-        } else {
-            prepend_sign = 1;
-        }
-        ++ulength;
-    }
-    if (width > ulength) {
-        ulength = width;
-    }
-    if (ulength == 1) {
-        return PyUnicode_FromOrdinal(*dpos);
-    }
-    return __Pyx_PyUnicode_BuildFromAscii(ulength, dpos, (int) length, prepend_sign, padding_char);
-}
-
-/* None */
-            static CYTHON_INLINE void __Pyx_RaiseUnboundLocalError(const char *varname) {
-    PyErr_Format(PyExc_UnboundLocalError, "local variable '%s' referenced before assignment", varname);
-}
-
-/* decode_c_string */
-            static CYTHON_INLINE PyObject* __Pyx_decode_c_string(
-         const char* cstring, Py_ssize_t start, Py_ssize_t stop,
-         const char* encoding, const char* errors,
-         PyObject* (*decode_func)(const char *s, Py_ssize_t size, const char *errors)) {
-    Py_ssize_t length;
-    if (unlikely((start < 0) | (stop < 0))) {
-        size_t slen = strlen(cstring);
-        if (unlikely(slen > (size_t) PY_SSIZE_T_MAX)) {
-            PyErr_SetString(PyExc_OverflowError,
-                            "c-string too long to convert to Python");
-            return NULL;
-        }
-        length = (Py_ssize_t) slen;
-        if (start < 0) {
-            start += length;
-            if (start < 0)
-                start = 0;
-        }
-        if (stop < 0)
-            stop += length;
-    }
-    length = stop - start;
-    if (unlikely(length <= 0))
-        return PyUnicode_FromUnicode(NULL, 0);
-    cstring += start;
-    if (decode_func) {
-        return decode_func(cstring, length, errors);
-    } else {
-        return PyUnicode_Decode(cstring, length, encoding, errors);
-    }
-}
-
-/* Import */
-            static PyObject *__Pyx_Import(PyObject *name, PyObject *from_list, int level) {
-    PyObject *empty_list = 0;
-    PyObject *module = 0;
-    PyObject *global_dict = 0;
-    PyObject *empty_dict = 0;
-    PyObject *list;
-    #if PY_MAJOR_VERSION < 3
-    PyObject *py_import;
-    py_import = __Pyx_PyObject_GetAttrStr(__pyx_b, __pyx_n_s_import);
-    if (!py_import)
-        goto bad;
-    #endif
-    if (from_list)
-        list = from_list;
-    else {
-        empty_list = PyList_New(0);
-        if (!empty_list)
-            goto bad;
-        list = empty_list;
-    }
-    global_dict = PyModule_GetDict(__pyx_m);
-    if (!global_dict)
-        goto bad;
-    empty_dict = PyDict_New();
-    if (!empty_dict)
-        goto bad;
-    {
-        #if PY_MAJOR_VERSION >= 3
-        if (level == -1) {
-            if (strchr(__Pyx_MODULE_NAME, '.')) {
-                module = PyImport_ImportModuleLevelObject(
-                    name, global_dict, empty_dict, list, 1);
-                if (!module) {
-                    if (!PyErr_ExceptionMatches(PyExc_ImportError))
-                        goto bad;
-                    PyErr_Clear();
-                }
-            }
-            level = 0;
-        }
-        #endif
-        if (!module) {
-            #if PY_MAJOR_VERSION < 3
-            PyObject *py_level = PyInt_FromLong(level);
-            if (!py_level)
-                goto bad;
-            module = PyObject_CallFunctionObjArgs(py_import,
-                name, global_dict, empty_dict, list, py_level, NULL);
-            Py_DECREF(py_level);
-            #else
-            module = PyImport_ImportModuleLevelObject(
-                name, global_dict, empty_dict, list, level);
-            #endif
-        }
-    }
-bad:
-    #if PY_MAJOR_VERSION < 3
-    Py_XDECREF(py_import);
-    #endif
-    Py_XDECREF(empty_list);
-    Py_XDECREF(empty_dict);
-    return module;
-}
-
-/* ImportFrom */
-            static PyObject* __Pyx_ImportFrom(PyObject* module, PyObject* name) {
-    PyObject* value = __Pyx_PyObject_GetAttrStr(module, name);
-    if (unlikely(!value) && PyErr_ExceptionMatches(PyExc_AttributeError)) {
-        PyErr_Format(PyExc_ImportError,
-        #if PY_MAJOR_VERSION < 3
-            "cannot import name %.230s", PyString_AS_STRING(name));
-        #else
-            "cannot import name %S", name);
-        #endif
-    }
-    return value;
-}
-
-/* HasAttr */
-            static CYTHON_INLINE int __Pyx_HasAttr(PyObject *o, PyObject *n) {
-    PyObject *r;
-    if (unlikely(!__Pyx_PyBaseString_Check(n))) {
-        PyErr_SetString(PyExc_TypeError,
-                        "hasattr(): attribute name must be string");
-        return -1;
-    }
-    r = __Pyx_GetAttr(o, n);
-    if (unlikely(!r)) {
-        PyErr_Clear();
-        return 0;
-    } else {
-        Py_DECREF(r);
-        return 1;
-    }
-}
-
-/* CallNextTpDealloc */
-            static void __Pyx_call_next_tp_dealloc(PyObject* obj, destructor current_tp_dealloc) {
-    PyTypeObject* type = Py_TYPE(obj);
-    while (type && type->tp_dealloc != current_tp_dealloc)
-        type = type->tp_base;
-    while (type && type->tp_dealloc == current_tp_dealloc)
-        type = type->tp_base;
-    if (type)
-        type->tp_dealloc(obj);
-}
-
-/* PyObject_GenericGetAttrNoDict */
-            #if CYTHON_USE_TYPE_SLOTS && CYTHON_USE_PYTYPE_LOOKUP && PY_VERSION_HEX < 0x03070000
-static PyObject *__Pyx_RaiseGenericGetAttributeError(PyTypeObject *tp, PyObject *attr_name) {
-    PyErr_Format(PyExc_AttributeError,
-#if PY_MAJOR_VERSION >= 3
-                 "'%.50s' object has no attribute '%U'",
-                 tp->tp_name, attr_name);
-#else
-                 "'%.50s' object has no attribute '%.400s'",
-                 tp->tp_name, PyString_AS_STRING(attr_name));
-#endif
-    return NULL;
-}
-static CYTHON_INLINE PyObject* __Pyx_PyObject_GenericGetAttrNoDict(PyObject* obj, PyObject* attr_name) {
-    PyObject *descr;
-    PyTypeObject *tp = Py_TYPE(obj);
-    if (unlikely(!PyString_Check(attr_name))) {
-        return PyObject_GenericGetAttr(obj, attr_name);
-    }
-    assert(!tp->tp_dictoffset);
-    descr = _PyType_Lookup(tp, attr_name);
-    if (unlikely(!descr)) {
-        return __Pyx_RaiseGenericGetAttributeError(tp, attr_name);
-    }
-    Py_INCREF(descr);
-    #if PY_MAJOR_VERSION < 3
-    if (likely(PyType_HasFeature(Py_TYPE(descr), Py_TPFLAGS_HAVE_CLASS)))
-    #endif
-    {
-        descrgetfunc f = Py_TYPE(descr)->tp_descr_get;
-        if (unlikely(f)) {
-            PyObject *res = f(descr, obj, (PyObject *)tp);
-            Py_DECREF(descr);
-            return res;
-        }
-    }
-    return descr;
-}
-#endif
-
-/* PyObject_GenericGetAttr */
-            #if CYTHON_USE_TYPE_SLOTS && CYTHON_USE_PYTYPE_LOOKUP && PY_VERSION_HEX < 0x03070000
-static PyObject* __Pyx_PyObject_GenericGetAttr(PyObject* obj, PyObject* attr_name) {
-    if (unlikely(Py_TYPE(obj)->tp_dictoffset)) {
-        return PyObject_GenericGetAttr(obj, attr_name);
-    }
-    return __Pyx_PyObject_GenericGetAttrNoDict(obj, attr_name);
-}
-#endif
-
-/* SetVTable */
-            static int __Pyx_SetVtable(PyObject *dict, void *vtable) {
-#if PY_VERSION_HEX >= 0x02070000
-    PyObject *ob = PyCapsule_New(vtable, 0, 0);
-#else
-    PyObject *ob = PyCObject_FromVoidPtr(vtable, 0);
-#endif
-    if (!ob)
-        goto bad;
-    if (PyDict_SetItem(dict, __pyx_n_s_pyx_vtable, ob) < 0)
-        goto bad;
-    Py_DECREF(ob);
-    return 0;
-bad:
-    Py_XDECREF(ob);
-    return -1;
-}
-
-/* SetupReduce */
-            static int __Pyx_setup_reduce_is_named(PyObject* meth, PyObject* name) {
-  int ret;
-  PyObject *name_attr;
-  name_attr = __Pyx_PyObject_GetAttrStr(meth, __pyx_n_s_name);
-  if (likely(name_attr)) {
-      ret = PyObject_RichCompareBool(name_attr, name, Py_EQ);
-  } else {
-      ret = -1;
-  }
-  if (unlikely(ret < 0)) {
-      PyErr_Clear();
-      ret = 0;
-  }
-  Py_XDECREF(name_attr);
-  return ret;
-}
-static int __Pyx_setup_reduce(PyObject* type_obj) {
-    int ret = 0;
-    PyObject *object_reduce = NULL;
-    PyObject *object_reduce_ex = NULL;
-    PyObject *reduce = NULL;
-    PyObject *reduce_ex = NULL;
-    PyObject *reduce_cython = NULL;
-    PyObject *setstate = NULL;
-    PyObject *setstate_cython = NULL;
-#if CYTHON_USE_PYTYPE_LOOKUP
-    if (_PyType_Lookup((PyTypeObject*)type_obj, __pyx_n_s_getstate)) goto GOOD;
-#else
-    if (PyObject_HasAttr(type_obj, __pyx_n_s_getstate)) goto GOOD;
-#endif
-#if CYTHON_USE_PYTYPE_LOOKUP
-    object_reduce_ex = _PyType_Lookup(&PyBaseObject_Type, __pyx_n_s_reduce_ex); if (!object_reduce_ex) goto BAD;
-#else
-    object_reduce_ex = __Pyx_PyObject_GetAttrStr((PyObject*)&PyBaseObject_Type, __pyx_n_s_reduce_ex); if (!object_reduce_ex) goto BAD;
-#endif
-    reduce_ex = __Pyx_PyObject_GetAttrStr(type_obj, __pyx_n_s_reduce_ex); if (unlikely(!reduce_ex)) goto BAD;
-    if (reduce_ex == object_reduce_ex) {
-#if CYTHON_USE_PYTYPE_LOOKUP
-        object_reduce = _PyType_Lookup(&PyBaseObject_Type, __pyx_n_s_reduce); if (!object_reduce) goto BAD;
-#else
-        object_reduce = __Pyx_PyObject_GetAttrStr((PyObject*)&PyBaseObject_Type, __pyx_n_s_reduce); if (!object_reduce) goto BAD;
-#endif
-        reduce = __Pyx_PyObject_GetAttrStr(type_obj, __pyx_n_s_reduce); if (unlikely(!reduce)) goto BAD;
-        if (reduce == object_reduce || __Pyx_setup_reduce_is_named(reduce, __pyx_n_s_reduce_cython)) {
-            reduce_cython = __Pyx_PyObject_GetAttrStr(type_obj, __pyx_n_s_reduce_cython); if (unlikely(!reduce_cython)) goto BAD;
-            ret = PyDict_SetItem(((PyTypeObject*)type_obj)->tp_dict, __pyx_n_s_reduce, reduce_cython); if (unlikely(ret < 0)) goto BAD;
-            ret = PyDict_DelItem(((PyTypeObject*)type_obj)->tp_dict, __pyx_n_s_reduce_cython); if (unlikely(ret < 0)) goto BAD;
-            setstate = __Pyx_PyObject_GetAttrStr(type_obj, __pyx_n_s_setstate);
-            if (!setstate) PyErr_Clear();
-            if (!setstate || __Pyx_setup_reduce_is_named(setstate, __pyx_n_s_setstate_cython)) {
-                setstate_cython = __Pyx_PyObject_GetAttrStr(type_obj, __pyx_n_s_setstate_cython); if (unlikely(!setstate_cython)) goto BAD;
-                ret = PyDict_SetItem(((PyTypeObject*)type_obj)->tp_dict, __pyx_n_s_setstate, setstate_cython); if (unlikely(ret < 0)) goto BAD;
-                ret = PyDict_DelItem(((PyTypeObject*)type_obj)->tp_dict, __pyx_n_s_setstate_cython); if (unlikely(ret < 0)) goto BAD;
-            }
-            PyType_Modified((PyTypeObject*)type_obj);
-        }
-    }
-    goto GOOD;
-BAD:
-    if (!PyErr_Occurred())
-        PyErr_Format(PyExc_RuntimeError, "Unable to initialize pickling for %s", ((PyTypeObject*)type_obj)->tp_name);
-    ret = -1;
-GOOD:
-#if !CYTHON_USE_PYTYPE_LOOKUP
-    Py_XDECREF(object_reduce);
-    Py_XDECREF(object_reduce_ex);
-#endif
-    Py_XDECREF(reduce);
-    Py_XDECREF(reduce_ex);
-    Py_XDECREF(reduce_cython);
-    Py_XDECREF(setstate);
-    Py_XDECREF(setstate_cython);
-    return ret;
-}
-
-/* GetVTable */
-            static void* __Pyx_GetVtable(PyObject *dict) {
-    void* ptr;
-    PyObject *ob = PyObject_GetItem(dict, __pyx_n_s_pyx_vtable);
-    if (!ob)
-        goto bad;
-#if PY_VERSION_HEX >= 0x02070000
-    ptr = PyCapsule_GetPointer(ob, 0);
-#else
-    ptr = PyCObject_AsVoidPtr(ob);
-#endif
-    if (!ptr && !PyErr_Occurred())
-        PyErr_SetString(PyExc_RuntimeError, "invalid vtable found for imported type");
-    Py_DECREF(ob);
-    return ptr;
-bad:
-    Py_XDECREF(ob);
-    return NULL;
-}
-
-/* GetNameInClass */
-            static PyObject *__Pyx_GetGlobalNameAfterAttributeLookup(PyObject *name) {
-    __Pyx_PyThreadState_declare
-    __Pyx_PyThreadState_assign
-    if (unlikely(!__Pyx_PyErr_ExceptionMatches(PyExc_AttributeError)))
-        return NULL;
-    __Pyx_PyErr_Clear();
-    return __Pyx_GetModuleGlobalName(name);
-}
-static PyObject *__Pyx_GetNameInClass(PyObject *nmspace, PyObject *name) {
-    PyObject *result;
-    result = __Pyx_PyObject_GetAttrStr(nmspace, name);
-    if (!result) {
-        result = __Pyx_GetGlobalNameAfterAttributeLookup(name);
-    }
-    return result;
-}
-
-/* CLineInTraceback */
-            #ifndef CYTHON_CLINE_IN_TRACEBACK
-static int __Pyx_CLineForTraceback(CYTHON_UNUSED PyThreadState *tstate, int c_line) {
-    PyObject *use_cline;
-    PyObject *ptype, *pvalue, *ptraceback;
-#if CYTHON_COMPILING_IN_CPYTHON
-    PyObject **cython_runtime_dict;
-#endif
-    if (unlikely(!__pyx_cython_runtime)) {
-        return c_line;
-    }
-    __Pyx_ErrFetchInState(tstate, &ptype, &pvalue, &ptraceback);
-#if CYTHON_COMPILING_IN_CPYTHON
-    cython_runtime_dict = _PyObject_GetDictPtr(__pyx_cython_runtime);
-    if (likely(cython_runtime_dict)) {
-      use_cline = __Pyx_PyDict_GetItemStr(*cython_runtime_dict, __pyx_n_s_cline_in_traceback);
-    } else
-#endif
-    {
-      PyObject *use_cline_obj = __Pyx_PyObject_GetAttrStr(__pyx_cython_runtime, __pyx_n_s_cline_in_traceback);
-      if (use_cline_obj) {
-        use_cline = PyObject_Not(use_cline_obj) ? Py_False : Py_True;
-        Py_DECREF(use_cline_obj);
-      } else {
-        PyErr_Clear();
-        use_cline = NULL;
-      }
-    }
-    if (!use_cline) {
-        c_line = 0;
-        PyObject_SetAttr(__pyx_cython_runtime, __pyx_n_s_cline_in_traceback, Py_False);
-    }
-    else if (PyObject_Not(use_cline) != 0) {
-        c_line = 0;
-    }
-    __Pyx_ErrRestoreInState(tstate, ptype, pvalue, ptraceback);
-    return c_line;
-}
-#endif
-
-/* CodeObjectCache */
-            static int __pyx_bisect_code_objects(__Pyx_CodeObjectCacheEntry* entries, int count, int code_line) {
-    int start = 0, mid = 0, end = count - 1;
-    if (end >= 0 && code_line > entries[end].code_line) {
-        return count;
-    }
-    while (start < end) {
-        mid = start + (end - start) / 2;
-        if (code_line < entries[mid].code_line) {
-            end = mid;
-        } else if (code_line > entries[mid].code_line) {
-             start = mid + 1;
-        } else {
-            return mid;
-        }
-    }
-    if (code_line <= entries[mid].code_line) {
-        return mid;
-    } else {
-        return mid + 1;
-    }
-}
-static PyCodeObject *__pyx_find_code_object(int code_line) {
-    PyCodeObject* code_object;
-    int pos;
-    if (unlikely(!code_line) || unlikely(!__pyx_code_cache.entries)) {
-        return NULL;
-    }
-    pos = __pyx_bisect_code_objects(__pyx_code_cache.entries, __pyx_code_cache.count, code_line);
-    if (unlikely(pos >= __pyx_code_cache.count) || unlikely(__pyx_code_cache.entries[pos].code_line != code_line)) {
-        return NULL;
-    }
-    code_object = __pyx_code_cache.entries[pos].code_object;
-    Py_INCREF(code_object);
-    return code_object;
-}
-static void __pyx_insert_code_object(int code_line, PyCodeObject* code_object) {
-    int pos, i;
-    __Pyx_CodeObjectCacheEntry* entries = __pyx_code_cache.entries;
-    if (unlikely(!code_line)) {
-        return;
-    }
-    if (unlikely(!entries)) {
-        entries = (__Pyx_CodeObjectCacheEntry*)PyMem_Malloc(64*sizeof(__Pyx_CodeObjectCacheEntry));
-        if (likely(entries)) {
-            __pyx_code_cache.entries = entries;
-            __pyx_code_cache.max_count = 64;
-            __pyx_code_cache.count = 1;
-            entries[0].code_line = code_line;
-            entries[0].code_object = code_object;
-            Py_INCREF(code_object);
-        }
-        return;
-    }
-    pos = __pyx_bisect_code_objects(__pyx_code_cache.entries, __pyx_code_cache.count, code_line);
-    if ((pos < __pyx_code_cache.count) && unlikely(__pyx_code_cache.entries[pos].code_line == code_line)) {
-        PyCodeObject* tmp = entries[pos].code_object;
-        entries[pos].code_object = code_object;
-        Py_DECREF(tmp);
-        return;
-    }
-    if (__pyx_code_cache.count == __pyx_code_cache.max_count) {
-        int new_max = __pyx_code_cache.max_count + 64;
-        entries = (__Pyx_CodeObjectCacheEntry*)PyMem_Realloc(
-            __pyx_code_cache.entries, (size_t)new_max*sizeof(__Pyx_CodeObjectCacheEntry));
-        if (unlikely(!entries)) {
-            return;
-        }
-        __pyx_code_cache.entries = entries;
-        __pyx_code_cache.max_count = new_max;
-    }
-    for (i=__pyx_code_cache.count; i>pos; i--) {
-        entries[i] = entries[i-1];
-    }
-    entries[pos].code_line = code_line;
-    entries[pos].code_object = code_object;
-    __pyx_code_cache.count++;
-    Py_INCREF(code_object);
-}
-
-/* AddTraceback */
-            #include "compile.h"
-#include "frameobject.h"
-#include "traceback.h"
-static PyCodeObject* __Pyx_CreateCodeObjectForTraceback(
-            const char *funcname, int c_line,
-            int py_line, const char *filename) {
-    PyCodeObject *py_code = 0;
-    PyObject *py_srcfile = 0;
-    PyObject *py_funcname = 0;
-    #if PY_MAJOR_VERSION < 3
-    py_srcfile = PyString_FromString(filename);
-    #else
-    py_srcfile = PyUnicode_FromString(filename);
-    #endif
-    if (!py_srcfile) goto bad;
-    if (c_line) {
-        #if PY_MAJOR_VERSION < 3
-        py_funcname = PyString_FromFormat( "%s (%s:%d)", funcname, __pyx_cfilenm, c_line);
-        #else
-        py_funcname = PyUnicode_FromFormat( "%s (%s:%d)", funcname, __pyx_cfilenm, c_line);
-        #endif
-    }
-    else {
-        #if PY_MAJOR_VERSION < 3
-        py_funcname = PyString_FromString(funcname);
-        #else
-        py_funcname = PyUnicode_FromString(funcname);
-        #endif
-    }
-    if (!py_funcname) goto bad;
-    py_code = __Pyx_PyCode_New(
-        0,
-        0,
-        0,
-        0,
-        0,
-        __pyx_empty_bytes, /*PyObject *code,*/
-        __pyx_empty_tuple, /*PyObject *consts,*/
-        __pyx_empty_tuple, /*PyObject *names,*/
-        __pyx_empty_tuple, /*PyObject *varnames,*/
-        __pyx_empty_tuple, /*PyObject *freevars,*/
-        __pyx_empty_tuple, /*PyObject *cellvars,*/
-        py_srcfile,   /*PyObject *filename,*/
-        py_funcname,  /*PyObject *name,*/
-        py_line,
-        __pyx_empty_bytes  /*PyObject *lnotab*/
-    );
-    Py_DECREF(py_srcfile);
-    Py_DECREF(py_funcname);
-    return py_code;
-bad:
-    Py_XDECREF(py_srcfile);
-    Py_XDECREF(py_funcname);
-    return NULL;
-}
-static void __Pyx_AddTraceback(const char *funcname, int c_line,
-                               int py_line, const char *filename) {
-    PyCodeObject *py_code = 0;
-    PyFrameObject *py_frame = 0;
-    PyThreadState *tstate = __Pyx_PyThreadState_Current;
-    if (c_line) {
-        c_line = __Pyx_CLineForTraceback(tstate, c_line);
-    }
-    py_code = __pyx_find_code_object(c_line ? -c_line : py_line);
-    if (!py_code) {
-        py_code = __Pyx_CreateCodeObjectForTraceback(
-            funcname, c_line, py_line, filename);
-        if (!py_code) goto bad;
-        __pyx_insert_code_object(c_line ? -c_line : py_line, py_code);
-    }
-    py_frame = PyFrame_New(
-        tstate,            /*PyThreadState *tstate,*/
-        py_code,           /*PyCodeObject *code,*/
-        __pyx_d,    /*PyObject *globals,*/
-        0                  /*PyObject *locals*/
-    );
-    if (!py_frame) goto bad;
-    __Pyx_PyFrame_SetLineNumber(py_frame, py_line);
-    PyTraceBack_Here(py_frame);
-bad:
-    Py_XDECREF(py_code);
-    Py_XDECREF(py_frame);
-}
-
-/* CIntFromPyVerify */
-            #define __PYX_VERIFY_RETURN_INT(target_type, func_type, func_value)\
-    __PYX__VERIFY_RETURN_INT(target_type, func_type, func_value, 0)
-#define __PYX_VERIFY_RETURN_INT_EXC(target_type, func_type, func_value)\
-    __PYX__VERIFY_RETURN_INT(target_type, func_type, func_value, 1)
-#define __PYX__VERIFY_RETURN_INT(target_type, func_type, func_value, exc)\
-    {\
-        func_type value = func_value;\
-        if (sizeof(target_type) < sizeof(func_type)) {\
-            if (unlikely(value != (func_type) (target_type) value)) {\
-                func_type zero = 0;\
-                if (exc && unlikely(value == (func_type)-1 && PyErr_Occurred()))\
-                    return (target_type) -1;\
-                if (is_unsigned && unlikely(value < zero))\
-                    goto raise_neg_overflow;\
-                else\
-                    goto raise_overflow;\
-            }\
-        }\
-        return (target_type) value;\
-    }
-
-/* CIntToPy */
-            static CYTHON_INLINE PyObject* __Pyx_PyInt_From_int(int value) {
-    const int neg_one = (int) -1, const_zero = (int) 0;
-    const int is_unsigned = neg_one > const_zero;
-    if (is_unsigned) {
-        if (sizeof(int) < sizeof(long)) {
-            return PyInt_FromLong((long) value);
-        } else if (sizeof(int) <= sizeof(unsigned long)) {
-            return PyLong_FromUnsignedLong((unsigned long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(int) <= sizeof(unsigned PY_LONG_LONG)) {
-            return PyLong_FromUnsignedLongLong((unsigned PY_LONG_LONG) value);
-#endif
-        }
-    } else {
-        if (sizeof(int) <= sizeof(long)) {
-            return PyInt_FromLong((long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(int) <= sizeof(PY_LONG_LONG)) {
-            return PyLong_FromLongLong((PY_LONG_LONG) value);
-#endif
-        }
-    }
-    {
-        int one = 1; int little = (int)*(unsigned char *)&one;
-        unsigned char *bytes = (unsigned char *)&value;
-        return _PyLong_FromByteArray(bytes, sizeof(int),
-                                     little, !is_unsigned);
-    }
-}
-
-/* CIntToPy */
-            static CYTHON_INLINE PyObject* __Pyx_PyInt_From_unsigned_char(unsigned char value) {
-    const unsigned char neg_one = (unsigned char) -1, const_zero = (unsigned char) 0;
-    const int is_unsigned = neg_one > const_zero;
-    if (is_unsigned) {
-        if (sizeof(unsigned char) < sizeof(long)) {
-            return PyInt_FromLong((long) value);
-        } else if (sizeof(unsigned char) <= sizeof(unsigned long)) {
-            return PyLong_FromUnsignedLong((unsigned long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(unsigned char) <= sizeof(unsigned PY_LONG_LONG)) {
-            return PyLong_FromUnsignedLongLong((unsigned PY_LONG_LONG) value);
-#endif
-        }
-    } else {
-        if (sizeof(unsigned char) <= sizeof(long)) {
-            return PyInt_FromLong((long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(unsigned char) <= sizeof(PY_LONG_LONG)) {
-            return PyLong_FromLongLong((PY_LONG_LONG) value);
-#endif
-        }
-    }
-    {
-        int one = 1; int little = (int)*(unsigned char *)&one;
-        unsigned char *bytes = (unsigned char *)&value;
-        return _PyLong_FromByteArray(bytes, sizeof(unsigned char),
-                                     little, !is_unsigned);
-    }
-}
-
-/* CIntToPy */
-            static CYTHON_INLINE PyObject* __Pyx_PyInt_From_long(long value) {
-    const long neg_one = (long) -1, const_zero = (long) 0;
-    const int is_unsigned = neg_one > const_zero;
-    if (is_unsigned) {
-        if (sizeof(long) < sizeof(long)) {
-            return PyInt_FromLong((long) value);
-        } else if (sizeof(long) <= sizeof(unsigned long)) {
-            return PyLong_FromUnsignedLong((unsigned long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(long) <= sizeof(unsigned PY_LONG_LONG)) {
-            return PyLong_FromUnsignedLongLong((unsigned PY_LONG_LONG) value);
-#endif
-        }
-    } else {
-        if (sizeof(long) <= sizeof(long)) {
-            return PyInt_FromLong((long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(long) <= sizeof(PY_LONG_LONG)) {
-            return PyLong_FromLongLong((PY_LONG_LONG) value);
-#endif
-        }
-    }
-    {
-        int one = 1; int little = (int)*(unsigned char *)&one;
-        unsigned char *bytes = (unsigned char *)&value;
-        return _PyLong_FromByteArray(bytes, sizeof(long),
-                                     little, !is_unsigned);
-    }
-}
-
-/* CIntToPy */
-            static CYTHON_INLINE PyObject* __Pyx_PyInt_From_MDB_dbi(MDB_dbi value) {
-    const MDB_dbi neg_one = (MDB_dbi) -1, const_zero = (MDB_dbi) 0;
-    const int is_unsigned = neg_one > const_zero;
-    if (is_unsigned) {
-        if (sizeof(MDB_dbi) < sizeof(long)) {
-            return PyInt_FromLong((long) value);
-        } else if (sizeof(MDB_dbi) <= sizeof(unsigned long)) {
-            return PyLong_FromUnsignedLong((unsigned long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(MDB_dbi) <= sizeof(unsigned PY_LONG_LONG)) {
-            return PyLong_FromUnsignedLongLong((unsigned PY_LONG_LONG) value);
-#endif
-        }
-    } else {
-        if (sizeof(MDB_dbi) <= sizeof(long)) {
-            return PyInt_FromLong((long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(MDB_dbi) <= sizeof(PY_LONG_LONG)) {
-            return PyLong_FromLongLong((PY_LONG_LONG) value);
-#endif
-        }
-    }
-    {
-        int one = 1; int little = (int)*(unsigned char *)&one;
-        unsigned char *bytes = (unsigned char *)&value;
-        return _PyLong_FromByteArray(bytes, sizeof(MDB_dbi),
-                                     little, !is_unsigned);
-    }
-}
-
-/* CIntToPy */
-            static CYTHON_INLINE PyObject* __Pyx_PyInt_From_char(char value) {
-    const char neg_one = (char) -1, const_zero = (char) 0;
-    const int is_unsigned = neg_one > const_zero;
-    if (is_unsigned) {
-        if (sizeof(char) < sizeof(long)) {
-            return PyInt_FromLong((long) value);
-        } else if (sizeof(char) <= sizeof(unsigned long)) {
-            return PyLong_FromUnsignedLong((unsigned long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(char) <= sizeof(unsigned PY_LONG_LONG)) {
-            return PyLong_FromUnsignedLongLong((unsigned PY_LONG_LONG) value);
-#endif
-        }
-    } else {
-        if (sizeof(char) <= sizeof(long)) {
-            return PyInt_FromLong((long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(char) <= sizeof(PY_LONG_LONG)) {
-            return PyLong_FromLongLong((PY_LONG_LONG) value);
-#endif
-        }
-    }
-    {
-        int one = 1; int little = (int)*(unsigned char *)&one;
-        unsigned char *bytes = (unsigned char *)&value;
-        return _PyLong_FromByteArray(bytes, sizeof(char),
-                                     little, !is_unsigned);
-    }
-}
-
-/* CIntFromPy */
-            static CYTHON_INLINE size_t __Pyx_PyInt_As_size_t(PyObject *x) {
-    const size_t neg_one = (size_t) -1, const_zero = (size_t) 0;
-    const int is_unsigned = neg_one > const_zero;
-#if PY_MAJOR_VERSION < 3
-    if (likely(PyInt_Check(x))) {
-        if (sizeof(size_t) < sizeof(long)) {
-            __PYX_VERIFY_RETURN_INT(size_t, long, PyInt_AS_LONG(x))
-        } else {
-            long val = PyInt_AS_LONG(x);
-            if (is_unsigned && unlikely(val < 0)) {
-                goto raise_neg_overflow;
-            }
-            return (size_t) val;
-        }
-    } else
-#endif
-    if (likely(PyLong_Check(x))) {
-        if (is_unsigned) {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (size_t) 0;
-                case  1: __PYX_VERIFY_RETURN_INT(size_t, digit, digits[0])
-                case 2:
-                    if (8 * sizeof(size_t) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(size_t, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(size_t) >= 2 * PyLong_SHIFT) {
-                            return (size_t) (((((size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(size_t) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(size_t, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(size_t) >= 3 * PyLong_SHIFT) {
-                            return (size_t) (((((((size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(size_t) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(size_t, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(size_t) >= 4 * PyLong_SHIFT) {
-                            return (size_t) (((((((((size_t)digits[3]) << PyLong_SHIFT) | (size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-                        }
-                    }
-                    break;
-            }
-#endif
-#if CYTHON_COMPILING_IN_CPYTHON
-            if (unlikely(Py_SIZE(x) < 0)) {
-                goto raise_neg_overflow;
-            }
-#else
-            {
-                int result = PyObject_RichCompareBool(x, Py_False, Py_LT);
-                if (unlikely(result < 0))
-                    return (size_t) -1;
-                if (unlikely(result == 1))
-                    goto raise_neg_overflow;
-            }
-#endif
-            if (sizeof(size_t) <= sizeof(unsigned long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(size_t, unsigned long, PyLong_AsUnsignedLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(size_t) <= sizeof(unsigned PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(size_t, unsigned PY_LONG_LONG, PyLong_AsUnsignedLongLong(x))
-#endif
-            }
-        } else {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (size_t) 0;
-                case -1: __PYX_VERIFY_RETURN_INT(size_t, sdigit, (sdigit) (-(sdigit)digits[0]))
-                case  1: __PYX_VERIFY_RETURN_INT(size_t,  digit, +digits[0])
-                case -2:
-                    if (8 * sizeof(size_t) - 1 > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(size_t, long, -(long) (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(size_t) - 1 > 2 * PyLong_SHIFT) {
-                            return (size_t) (((size_t)-1)*(((((size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0])));
-                        }
-                    }
-                    break;
-                case 2:
-                    if (8 * sizeof(size_t) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(size_t, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(size_t) - 1 > 2 * PyLong_SHIFT) {
-                            return (size_t) ((((((size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0])));
-                        }
-                    }
-                    break;
-                case -3:
-                    if (8 * sizeof(size_t) - 1 > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(size_t, long, -(long) (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(size_t) - 1 > 3 * PyLong_SHIFT) {
-                            return (size_t) (((size_t)-1)*(((((((size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0])));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(size_t) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(size_t, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(size_t) - 1 > 3 * PyLong_SHIFT) {
-                            return (size_t) ((((((((size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0])));
-                        }
-                    }
-                    break;
-                case -4:
-                    if (8 * sizeof(size_t) - 1 > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(size_t, long, -(long) (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(size_t) - 1 > 4 * PyLong_SHIFT) {
-                            return (size_t) (((size_t)-1)*(((((((((size_t)digits[3]) << PyLong_SHIFT) | (size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0])));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(size_t) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(size_t, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(size_t) - 1 > 4 * PyLong_SHIFT) {
-                            return (size_t) ((((((((((size_t)digits[3]) << PyLong_SHIFT) | (size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0])));
-                        }
-                    }
-                    break;
-            }
-#endif
-            if (sizeof(size_t) <= sizeof(long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(size_t, long, PyLong_AsLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(size_t) <= sizeof(PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(size_t, PY_LONG_LONG, PyLong_AsLongLong(x))
-#endif
-            }
-        }
-        {
-#if CYTHON_COMPILING_IN_PYPY && !defined(_PyLong_AsByteArray)
-            PyErr_SetString(PyExc_RuntimeError,
-                            "_PyLong_AsByteArray() not available in PyPy, cannot convert large numbers");
-#else
-            size_t val;
-            PyObject *v = __Pyx_PyNumber_IntOrLong(x);
- #if PY_MAJOR_VERSION < 3
-            if (likely(v) && !PyLong_Check(v)) {
-                PyObject *tmp = v;
-                v = PyNumber_Long(tmp);
-                Py_DECREF(tmp);
-            }
- #endif
-            if (likely(v)) {
-                int one = 1; int is_little = (int)*(unsigned char *)&one;
-                unsigned char *bytes = (unsigned char *)&val;
-                int ret = _PyLong_AsByteArray((PyLongObject *)v,
-                                              bytes, sizeof(val),
-                                              is_little, !is_unsigned);
-                Py_DECREF(v);
-                if (likely(!ret))
-                    return val;
-            }
-#endif
-            return (size_t) -1;
-        }
-    } else {
-        size_t val;
-        PyObject *tmp = __Pyx_PyNumber_IntOrLong(x);
-        if (!tmp) return (size_t) -1;
-        val = __Pyx_PyInt_As_size_t(tmp);
-        Py_DECREF(tmp);
-        return val;
-    }
-raise_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "value too large to convert to size_t");
-    return (size_t) -1;
-raise_neg_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "can't convert negative value to size_t");
-    return (size_t) -1;
-}
-
-/* CIntFromPy */
-            static CYTHON_INLINE unsigned char __Pyx_PyInt_As_unsigned_char(PyObject *x) {
-    const unsigned char neg_one = (unsigned char) -1, const_zero = (unsigned char) 0;
-    const int is_unsigned = neg_one > const_zero;
-#if PY_MAJOR_VERSION < 3
-    if (likely(PyInt_Check(x))) {
-        if (sizeof(unsigned char) < sizeof(long)) {
-            __PYX_VERIFY_RETURN_INT(unsigned char, long, PyInt_AS_LONG(x))
-        } else {
-            long val = PyInt_AS_LONG(x);
-            if (is_unsigned && unlikely(val < 0)) {
-                goto raise_neg_overflow;
-            }
-            return (unsigned char) val;
-        }
-    } else
-#endif
-    if (likely(PyLong_Check(x))) {
-        if (is_unsigned) {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (unsigned char) 0;
-                case  1: __PYX_VERIFY_RETURN_INT(unsigned char, digit, digits[0])
-                case 2:
-                    if (8 * sizeof(unsigned char) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(unsigned char, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(unsigned char) >= 2 * PyLong_SHIFT) {
-                            return (unsigned char) (((((unsigned char)digits[1]) << PyLong_SHIFT) | (unsigned char)digits[0]));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(unsigned char) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(unsigned char, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(unsigned char) >= 3 * PyLong_SHIFT) {
-                            return (unsigned char) (((((((unsigned char)digits[2]) << PyLong_SHIFT) | (unsigned char)digits[1]) << PyLong_SHIFT) | (unsigned char)digits[0]));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(unsigned char) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(unsigned char, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(unsigned char) >= 4 * PyLong_SHIFT) {
-                            return (unsigned char) (((((((((unsigned char)digits[3]) << PyLong_SHIFT) | (unsigned char)digits[2]) << PyLong_SHIFT) | (unsigned char)digits[1]) << PyLong_SHIFT) | (unsigned char)digits[0]));
-                        }
-                    }
-                    break;
-            }
-#endif
-#if CYTHON_COMPILING_IN_CPYTHON
-            if (unlikely(Py_SIZE(x) < 0)) {
-                goto raise_neg_overflow;
-            }
-#else
-            {
-                int result = PyObject_RichCompareBool(x, Py_False, Py_LT);
-                if (unlikely(result < 0))
-                    return (unsigned char) -1;
-                if (unlikely(result == 1))
-                    goto raise_neg_overflow;
-            }
-#endif
-            if (sizeof(unsigned char) <= sizeof(unsigned long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(unsigned char, unsigned long, PyLong_AsUnsignedLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(unsigned char) <= sizeof(unsigned PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(unsigned char, unsigned PY_LONG_LONG, PyLong_AsUnsignedLongLong(x))
-#endif
-            }
-        } else {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (unsigned char) 0;
-                case -1: __PYX_VERIFY_RETURN_INT(unsigned char, sdigit, (sdigit) (-(sdigit)digits[0]))
-                case  1: __PYX_VERIFY_RETURN_INT(unsigned char,  digit, +digits[0])
-                case -2:
-                    if (8 * sizeof(unsigned char) - 1 > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(unsigned char, long, -(long) (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(unsigned char) - 1 > 2 * PyLong_SHIFT) {
-                            return (unsigned char) (((unsigned char)-1)*(((((unsigned char)digits[1]) << PyLong_SHIFT) | (unsigned char)digits[0])));
-                        }
-                    }
-                    break;
-                case 2:
-                    if (8 * sizeof(unsigned char) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(unsigned char, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(unsigned char) - 1 > 2 * PyLong_SHIFT) {
-                            return (unsigned char) ((((((unsigned char)digits[1]) << PyLong_SHIFT) | (unsigned char)digits[0])));
-                        }
-                    }
-                    break;
-                case -3:
-                    if (8 * sizeof(unsigned char) - 1 > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(unsigned char, long, -(long) (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(unsigned char) - 1 > 3 * PyLong_SHIFT) {
-                            return (unsigned char) (((unsigned char)-1)*(((((((unsigned char)digits[2]) << PyLong_SHIFT) | (unsigned char)digits[1]) << PyLong_SHIFT) | (unsigned char)digits[0])));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(unsigned char) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(unsigned char, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(unsigned char) - 1 > 3 * PyLong_SHIFT) {
-                            return (unsigned char) ((((((((unsigned char)digits[2]) << PyLong_SHIFT) | (unsigned char)digits[1]) << PyLong_SHIFT) | (unsigned char)digits[0])));
-                        }
-                    }
-                    break;
-                case -4:
-                    if (8 * sizeof(unsigned char) - 1 > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(unsigned char, long, -(long) (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(unsigned char) - 1 > 4 * PyLong_SHIFT) {
-                            return (unsigned char) (((unsigned char)-1)*(((((((((unsigned char)digits[3]) << PyLong_SHIFT) | (unsigned char)digits[2]) << PyLong_SHIFT) | (unsigned char)digits[1]) << PyLong_SHIFT) | (unsigned char)digits[0])));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(unsigned char) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(unsigned char, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(unsigned char) - 1 > 4 * PyLong_SHIFT) {
-                            return (unsigned char) ((((((((((unsigned char)digits[3]) << PyLong_SHIFT) | (unsigned char)digits[2]) << PyLong_SHIFT) | (unsigned char)digits[1]) << PyLong_SHIFT) | (unsigned char)digits[0])));
-                        }
-                    }
-                    break;
-            }
-#endif
-            if (sizeof(unsigned char) <= sizeof(long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(unsigned char, long, PyLong_AsLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(unsigned char) <= sizeof(PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(unsigned char, PY_LONG_LONG, PyLong_AsLongLong(x))
-#endif
-            }
-        }
-        {
-#if CYTHON_COMPILING_IN_PYPY && !defined(_PyLong_AsByteArray)
-            PyErr_SetString(PyExc_RuntimeError,
-                            "_PyLong_AsByteArray() not available in PyPy, cannot convert large numbers");
-#else
-            unsigned char val;
-            PyObject *v = __Pyx_PyNumber_IntOrLong(x);
- #if PY_MAJOR_VERSION < 3
-            if (likely(v) && !PyLong_Check(v)) {
-                PyObject *tmp = v;
-                v = PyNumber_Long(tmp);
-                Py_DECREF(tmp);
-            }
- #endif
-            if (likely(v)) {
-                int one = 1; int is_little = (int)*(unsigned char *)&one;
-                unsigned char *bytes = (unsigned char *)&val;
-                int ret = _PyLong_AsByteArray((PyLongObject *)v,
-                                              bytes, sizeof(val),
-                                              is_little, !is_unsigned);
-                Py_DECREF(v);
-                if (likely(!ret))
-                    return val;
-            }
-#endif
-            return (unsigned char) -1;
-        }
-    } else {
-        unsigned char val;
-        PyObject *tmp = __Pyx_PyNumber_IntOrLong(x);
-        if (!tmp) return (unsigned char) -1;
-        val = __Pyx_PyInt_As_unsigned_char(tmp);
-        Py_DECREF(tmp);
-        return val;
-    }
-raise_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "value too large to convert to unsigned char");
-    return (unsigned char) -1;
-raise_neg_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "can't convert negative value to unsigned char");
-    return (unsigned char) -1;
-}
-
-/* CIntFromPy */
-            static CYTHON_INLINE long __Pyx_PyInt_As_long(PyObject *x) {
-    const long neg_one = (long) -1, const_zero = (long) 0;
-    const int is_unsigned = neg_one > const_zero;
-#if PY_MAJOR_VERSION < 3
-    if (likely(PyInt_Check(x))) {
-        if (sizeof(long) < sizeof(long)) {
-            __PYX_VERIFY_RETURN_INT(long, long, PyInt_AS_LONG(x))
-        } else {
-            long val = PyInt_AS_LONG(x);
-            if (is_unsigned && unlikely(val < 0)) {
-                goto raise_neg_overflow;
-            }
-            return (long) val;
-        }
-    } else
-#endif
-    if (likely(PyLong_Check(x))) {
-        if (is_unsigned) {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (long) 0;
-                case  1: __PYX_VERIFY_RETURN_INT(long, digit, digits[0])
-                case 2:
-                    if (8 * sizeof(long) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) >= 2 * PyLong_SHIFT) {
-                            return (long) (((((long)digits[1]) << PyLong_SHIFT) | (long)digits[0]));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(long) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) >= 3 * PyLong_SHIFT) {
-                            return (long) (((((((long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0]));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(long) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) >= 4 * PyLong_SHIFT) {
-                            return (long) (((((((((long)digits[3]) << PyLong_SHIFT) | (long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0]));
-                        }
-                    }
-                    break;
-            }
-#endif
-#if CYTHON_COMPILING_IN_CPYTHON
-            if (unlikely(Py_SIZE(x) < 0)) {
-                goto raise_neg_overflow;
-            }
-#else
-            {
-                int result = PyObject_RichCompareBool(x, Py_False, Py_LT);
-                if (unlikely(result < 0))
-                    return (long) -1;
-                if (unlikely(result == 1))
-                    goto raise_neg_overflow;
-            }
-#endif
-            if (sizeof(long) <= sizeof(unsigned long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(long, unsigned long, PyLong_AsUnsignedLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(long) <= sizeof(unsigned PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(long, unsigned PY_LONG_LONG, PyLong_AsUnsignedLongLong(x))
-#endif
-            }
-        } else {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (long) 0;
-                case -1: __PYX_VERIFY_RETURN_INT(long, sdigit, (sdigit) (-(sdigit)digits[0]))
-                case  1: __PYX_VERIFY_RETURN_INT(long,  digit, +digits[0])
-                case -2:
-                    if (8 * sizeof(long) - 1 > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, long, -(long) (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 2 * PyLong_SHIFT) {
-                            return (long) (((long)-1)*(((((long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-                case 2:
-                    if (8 * sizeof(long) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 2 * PyLong_SHIFT) {
-                            return (long) ((((((long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-                case -3:
-                    if (8 * sizeof(long) - 1 > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, long, -(long) (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 3 * PyLong_SHIFT) {
-                            return (long) (((long)-1)*(((((((long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(long) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 3 * PyLong_SHIFT) {
-                            return (long) ((((((((long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-                case -4:
-                    if (8 * sizeof(long) - 1 > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, long, -(long) (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 4 * PyLong_SHIFT) {
-                            return (long) (((long)-1)*(((((((((long)digits[3]) << PyLong_SHIFT) | (long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(long) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 4 * PyLong_SHIFT) {
-                            return (long) ((((((((((long)digits[3]) << PyLong_SHIFT) | (long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-            }
-#endif
-            if (sizeof(long) <= sizeof(long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(long, long, PyLong_AsLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(long) <= sizeof(PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(long, PY_LONG_LONG, PyLong_AsLongLong(x))
-#endif
-            }
-        }
-        {
-#if CYTHON_COMPILING_IN_PYPY && !defined(_PyLong_AsByteArray)
-            PyErr_SetString(PyExc_RuntimeError,
-                            "_PyLong_AsByteArray() not available in PyPy, cannot convert large numbers");
-#else
-            long val;
-            PyObject *v = __Pyx_PyNumber_IntOrLong(x);
- #if PY_MAJOR_VERSION < 3
-            if (likely(v) && !PyLong_Check(v)) {
-                PyObject *tmp = v;
-                v = PyNumber_Long(tmp);
-                Py_DECREF(tmp);
-            }
- #endif
-            if (likely(v)) {
-                int one = 1; int is_little = (int)*(unsigned char *)&one;
-                unsigned char *bytes = (unsigned char *)&val;
-                int ret = _PyLong_AsByteArray((PyLongObject *)v,
-                                              bytes, sizeof(val),
-                                              is_little, !is_unsigned);
-                Py_DECREF(v);
-                if (likely(!ret))
-                    return val;
-            }
-#endif
-            return (long) -1;
-        }
-    } else {
-        long val;
-        PyObject *tmp = __Pyx_PyNumber_IntOrLong(x);
-        if (!tmp) return (long) -1;
-        val = __Pyx_PyInt_As_long(tmp);
-        Py_DECREF(tmp);
-        return val;
-    }
-raise_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "value too large to convert to long");
-    return (long) -1;
-raise_neg_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "can't convert negative value to long");
-    return (long) -1;
-}
-
-/* BytesContains */
-            static CYTHON_INLINE int __Pyx_BytesContains(PyObject* bytes, char character) {
-    const Py_ssize_t length = PyBytes_GET_SIZE(bytes);
-    char* char_start = PyBytes_AS_STRING(bytes);
-    return memchr(char_start, (unsigned char)character, (size_t)length) != NULL;
-}
-
-/* CIntFromPy */
-            static CYTHON_INLINE int __Pyx_PyInt_As_int(PyObject *x) {
-    const int neg_one = (int) -1, const_zero = (int) 0;
-    const int is_unsigned = neg_one > const_zero;
-#if PY_MAJOR_VERSION < 3
-    if (likely(PyInt_Check(x))) {
-        if (sizeof(int) < sizeof(long)) {
-            __PYX_VERIFY_RETURN_INT(int, long, PyInt_AS_LONG(x))
-        } else {
-            long val = PyInt_AS_LONG(x);
-            if (is_unsigned && unlikely(val < 0)) {
-                goto raise_neg_overflow;
-            }
-            return (int) val;
-        }
-    } else
-#endif
-    if (likely(PyLong_Check(x))) {
-        if (is_unsigned) {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (int) 0;
-                case  1: __PYX_VERIFY_RETURN_INT(int, digit, digits[0])
-                case 2:
-                    if (8 * sizeof(int) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) >= 2 * PyLong_SHIFT) {
-                            return (int) (((((int)digits[1]) << PyLong_SHIFT) | (int)digits[0]));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(int) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) >= 3 * PyLong_SHIFT) {
-                            return (int) (((((((int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0]));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(int) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) >= 4 * PyLong_SHIFT) {
-                            return (int) (((((((((int)digits[3]) << PyLong_SHIFT) | (int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0]));
-                        }
-                    }
-                    break;
-            }
-#endif
-#if CYTHON_COMPILING_IN_CPYTHON
-            if (unlikely(Py_SIZE(x) < 0)) {
-                goto raise_neg_overflow;
-            }
-#else
-            {
-                int result = PyObject_RichCompareBool(x, Py_False, Py_LT);
-                if (unlikely(result < 0))
-                    return (int) -1;
-                if (unlikely(result == 1))
-                    goto raise_neg_overflow;
-            }
-#endif
-            if (sizeof(int) <= sizeof(unsigned long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(int, unsigned long, PyLong_AsUnsignedLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(int) <= sizeof(unsigned PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(int, unsigned PY_LONG_LONG, PyLong_AsUnsignedLongLong(x))
-#endif
-            }
-        } else {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (int) 0;
-                case -1: __PYX_VERIFY_RETURN_INT(int, sdigit, (sdigit) (-(sdigit)digits[0]))
-                case  1: __PYX_VERIFY_RETURN_INT(int,  digit, +digits[0])
-                case -2:
-                    if (8 * sizeof(int) - 1 > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, long, -(long) (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 2 * PyLong_SHIFT) {
-                            return (int) (((int)-1)*(((((int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-                case 2:
-                    if (8 * sizeof(int) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 2 * PyLong_SHIFT) {
-                            return (int) ((((((int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-                case -3:
-                    if (8 * sizeof(int) - 1 > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, long, -(long) (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 3 * PyLong_SHIFT) {
-                            return (int) (((int)-1)*(((((((int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(int) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 3 * PyLong_SHIFT) {
-                            return (int) ((((((((int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-                case -4:
-                    if (8 * sizeof(int) - 1 > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, long, -(long) (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 4 * PyLong_SHIFT) {
-                            return (int) (((int)-1)*(((((((((int)digits[3]) << PyLong_SHIFT) | (int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(int) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 4 * PyLong_SHIFT) {
-                            return (int) ((((((((((int)digits[3]) << PyLong_SHIFT) | (int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-            }
-#endif
-            if (sizeof(int) <= sizeof(long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(int, long, PyLong_AsLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(int) <= sizeof(PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(int, PY_LONG_LONG, PyLong_AsLongLong(x))
-#endif
-            }
-        }
-        {
-#if CYTHON_COMPILING_IN_PYPY && !defined(_PyLong_AsByteArray)
-            PyErr_SetString(PyExc_RuntimeError,
-                            "_PyLong_AsByteArray() not available in PyPy, cannot convert large numbers");
-#else
-            int val;
-            PyObject *v = __Pyx_PyNumber_IntOrLong(x);
- #if PY_MAJOR_VERSION < 3
-            if (likely(v) && !PyLong_Check(v)) {
-                PyObject *tmp = v;
-                v = PyNumber_Long(tmp);
-                Py_DECREF(tmp);
-            }
- #endif
-            if (likely(v)) {
-                int one = 1; int is_little = (int)*(unsigned char *)&one;
-                unsigned char *bytes = (unsigned char *)&val;
-                int ret = _PyLong_AsByteArray((PyLongObject *)v,
-                                              bytes, sizeof(val),
-                                              is_little, !is_unsigned);
-                Py_DECREF(v);
-                if (likely(!ret))
-                    return val;
-            }
-#endif
-            return (int) -1;
-        }
-    } else {
-        int val;
-        PyObject *tmp = __Pyx_PyNumber_IntOrLong(x);
-        if (!tmp) return (int) -1;
-        val = __Pyx_PyInt_As_int(tmp);
-        Py_DECREF(tmp);
-        return val;
-    }
-raise_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "value too large to convert to int");
-    return (int) -1;
-raise_neg_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "can't convert negative value to int");
-    return (int) -1;
-}
-
-/* PyObjectCallMethod1 */
-            static PyObject* __Pyx__PyObject_CallMethod1(PyObject* method, PyObject* arg) {
-    PyObject *result = NULL;
-#if CYTHON_UNPACK_METHODS
-    if (likely(PyMethod_Check(method))) {
-        PyObject *self = PyMethod_GET_SELF(method);
-        if (likely(self)) {
-            PyObject *args;
-            PyObject *function = PyMethod_GET_FUNCTION(method);
-            #if CYTHON_FAST_PYCALL
-            if (PyFunction_Check(function)) {
-                PyObject *args[2] = {self, arg};
-                result = __Pyx_PyFunction_FastCall(function, args, 2);
-                goto done;
-            }
-            #endif
-            #if CYTHON_FAST_PYCCALL
-            if (__Pyx_PyFastCFunction_Check(function)) {
-                PyObject *args[2] = {self, arg};
-                result = __Pyx_PyCFunction_FastCall(function, args, 2);
-                goto done;
-            }
-            #endif
-            args = PyTuple_New(2);
-            if (unlikely(!args)) goto done;
-            Py_INCREF(self);
-            PyTuple_SET_ITEM(args, 0, self);
-            Py_INCREF(arg);
-            PyTuple_SET_ITEM(args, 1, arg);
-            Py_INCREF(function);
-            result = __Pyx_PyObject_Call(function, args, NULL);
-            Py_DECREF(args);
-            Py_DECREF(function);
-            return result;
-        }
-    }
-#endif
-    result = __Pyx_PyObject_CallOneArg(method, arg);
-    goto done;
-done:
-    return result;
-}
-static PyObject* __Pyx_PyObject_CallMethod1(PyObject* obj, PyObject* method_name, PyObject* arg) {
-    PyObject *method, *result;
-    method = __Pyx_PyObject_GetAttrStr(obj, method_name);
-    if (unlikely(!method)) return NULL;
-    result = __Pyx__PyObject_CallMethod1(method, arg);
-    Py_DECREF(method);
-    return result;
-}
-
-/* CoroutineBase */
-            #include <structmember.h>
-#include <frameobject.h>
-#define __Pyx_Coroutine_Undelegate(gen) Py_CLEAR((gen)->yieldfrom)
-static int __Pyx_PyGen__FetchStopIterationValue(CYTHON_UNUSED PyThreadState *__pyx_tstate, PyObject **pvalue) {
-    PyObject *et, *ev, *tb;
-    PyObject *value = NULL;
-    __Pyx_ErrFetch(&et, &ev, &tb);
-    if (!et) {
-        Py_XDECREF(tb);
-        Py_XDECREF(ev);
-        Py_INCREF(Py_None);
-        *pvalue = Py_None;
-        return 0;
-    }
-    if (likely(et == PyExc_StopIteration)) {
-        if (!ev) {
-            Py_INCREF(Py_None);
-            value = Py_None;
-        }
-#if PY_VERSION_HEX >= 0x030300A0
-        else if (Py_TYPE(ev) == (PyTypeObject*)PyExc_StopIteration) {
-            value = ((PyStopIterationObject *)ev)->value;
-            Py_INCREF(value);
-            Py_DECREF(ev);
-        }
-#endif
-        else if (unlikely(PyTuple_Check(ev))) {
-            if (PyTuple_GET_SIZE(ev) >= 1) {
-#if CYTHON_ASSUME_SAFE_MACROS && !CYTHON_AVOID_BORROWED_REFS
-                value = PyTuple_GET_ITEM(ev, 0);
-                Py_INCREF(value);
-#else
-                value = PySequence_ITEM(ev, 0);
-#endif
-            } else {
-                Py_INCREF(Py_None);
-                value = Py_None;
-            }
-            Py_DECREF(ev);
-        }
-        else if (!__Pyx_TypeCheck(ev, (PyTypeObject*)PyExc_StopIteration)) {
-            value = ev;
-        }
-        if (likely(value)) {
-            Py_XDECREF(tb);
-            Py_DECREF(et);
-            *pvalue = value;
-            return 0;
-        }
-    } else if (!__Pyx_PyErr_GivenExceptionMatches(et, PyExc_StopIteration)) {
-        __Pyx_ErrRestore(et, ev, tb);
-        return -1;
-    }
-    PyErr_NormalizeException(&et, &ev, &tb);
-    if (unlikely(!PyObject_TypeCheck(ev, (PyTypeObject*)PyExc_StopIteration))) {
-        __Pyx_ErrRestore(et, ev, tb);
-        return -1;
-    }
-    Py_XDECREF(tb);
-    Py_DECREF(et);
-#if PY_VERSION_HEX >= 0x030300A0
-    value = ((PyStopIterationObject *)ev)->value;
-    Py_INCREF(value);
-    Py_DECREF(ev);
-#else
-    {
-        PyObject* args = __Pyx_PyObject_GetAttrStr(ev, __pyx_n_s_args);
-        Py_DECREF(ev);
-        if (likely(args)) {
-            value = PySequence_GetItem(args, 0);
-            Py_DECREF(args);
-        }
-        if (unlikely(!value)) {
-            __Pyx_ErrRestore(NULL, NULL, NULL);
-            Py_INCREF(Py_None);
-            value = Py_None;
-        }
-    }
-#endif
-    *pvalue = value;
-    return 0;
-}
-static CYTHON_INLINE
-void __Pyx_Coroutine_ExceptionClear(__pyx_CoroutineObject *self) {
-    PyObject *exc_type = self->exc_type;
-    PyObject *exc_value = self->exc_value;
-    PyObject *exc_traceback = self->exc_traceback;
-    self->exc_type = NULL;
-    self->exc_value = NULL;
-    self->exc_traceback = NULL;
-    Py_XDECREF(exc_type);
-    Py_XDECREF(exc_value);
-    Py_XDECREF(exc_traceback);
-}
-#define __Pyx_Coroutine_AlreadyRunningError(gen)  (__Pyx__Coroutine_AlreadyRunningError(gen), (PyObject*)NULL)
-static void __Pyx__Coroutine_AlreadyRunningError(CYTHON_UNUSED __pyx_CoroutineObject *gen) {
-    const char *msg;
-    if (0) {
-    #ifdef __Pyx_Coroutine_USED
-    } else if (__Pyx_Coroutine_Check((PyObject*)gen)) {
-        msg = "coroutine already executing";
-    #endif
-    #ifdef __Pyx_AsyncGen_USED
-    } else if (__Pyx_AsyncGen_CheckExact((PyObject*)gen)) {
-        msg = "async generator already executing";
-    #endif
-    } else {
-        msg = "generator already executing";
-    }
-    PyErr_SetString(PyExc_ValueError, msg);
-}
-#define __Pyx_Coroutine_NotStartedError(gen)  (__Pyx__Coroutine_NotStartedError(gen), (PyObject*)NULL)
-static void __Pyx__Coroutine_NotStartedError(CYTHON_UNUSED PyObject *gen) {
-    const char *msg;
-    if (0) {
-    #ifdef __Pyx_Coroutine_USED
-    } else if (__Pyx_Coroutine_Check(gen)) {
-        msg = "can't send non-None value to a just-started coroutine";
-    #endif
-    #ifdef __Pyx_AsyncGen_USED
-    } else if (__Pyx_AsyncGen_CheckExact(gen)) {
-        msg = "can't send non-None value to a just-started async generator";
-    #endif
-    } else {
-        msg = "can't send non-None value to a just-started generator";
-    }
-    PyErr_SetString(PyExc_TypeError, msg);
-}
-#define __Pyx_Coroutine_AlreadyTerminatedError(gen, value, closing)  (__Pyx__Coroutine_AlreadyTerminatedError(gen, value, closing), (PyObject*)NULL)
-static void __Pyx__Coroutine_AlreadyTerminatedError(CYTHON_UNUSED PyObject *gen, PyObject *value, CYTHON_UNUSED int closing) {
-    #ifdef __Pyx_Coroutine_USED
-    if (!closing && __Pyx_Coroutine_Check(gen)) {
-        PyErr_SetString(PyExc_RuntimeError, "cannot reuse already awaited coroutine");
-    } else
-    #endif
-    if (value) {
-        #ifdef __Pyx_AsyncGen_USED
-        if (__Pyx_AsyncGen_CheckExact(gen))
-            PyErr_SetNone(__Pyx_PyExc_StopAsyncIteration);
-        else
-        #endif
-        PyErr_SetNone(PyExc_StopIteration);
-    }
-}
-static
-PyObject *__Pyx_Coroutine_SendEx(__pyx_CoroutineObject *self, PyObject *value, int closing) {
-    __Pyx_PyThreadState_declare
-    PyThreadState *tstate;
-    PyObject *retval;
-    assert(!self->is_running);
-    if (unlikely(self->resume_label == 0)) {
-        if (unlikely(value && value != Py_None)) {
-            return __Pyx_Coroutine_NotStartedError((PyObject*)self);
-        }
-    }
-    if (unlikely(self->resume_label == -1)) {
-        return __Pyx_Coroutine_AlreadyTerminatedError((PyObject*)self, value, closing);
-    }
-#if CYTHON_FAST_THREAD_STATE
-    __Pyx_PyThreadState_assign
-    tstate = __pyx_tstate;
-#else
-    tstate = __Pyx_PyThreadState_Current;
-#endif
-    if (self->exc_type) {
-#if CYTHON_COMPILING_IN_PYPY || CYTHON_COMPILING_IN_PYSTON
-#else
-        if (self->exc_traceback) {
-            PyTracebackObject *tb = (PyTracebackObject *) self->exc_traceback;
-            PyFrameObject *f = tb->tb_frame;
-            Py_XINCREF(tstate->frame);
-            assert(f->f_back == NULL);
-            f->f_back = tstate->frame;
-        }
-#endif
-        __Pyx_ExceptionSwap(&self->exc_type, &self->exc_value,
-                            &self->exc_traceback);
-    } else {
-        __Pyx_Coroutine_ExceptionClear(self);
-        __Pyx_ExceptionSave(&self->exc_type, &self->exc_value, &self->exc_traceback);
-    }
-    self->is_running = 1;
-    retval = self->body((PyObject *) self, tstate, value);
-    self->is_running = 0;
-    return retval;
-}
-static CYTHON_INLINE void __Pyx_Coroutine_ResetFrameBackpointer(__pyx_CoroutineObject *self) {
-    if (likely(self->exc_traceback)) {
-#if CYTHON_COMPILING_IN_PYPY || CYTHON_COMPILING_IN_PYSTON
-#else
-        PyTracebackObject *tb = (PyTracebackObject *) self->exc_traceback;
-        PyFrameObject *f = tb->tb_frame;
-        Py_CLEAR(f->f_back);
-#endif
-    }
-}
-static CYTHON_INLINE
-PyObject *__Pyx_Coroutine_MethodReturn(CYTHON_UNUSED PyObject* gen, PyObject *retval) {
-    if (unlikely(!retval)) {
-        __Pyx_PyThreadState_declare
-        __Pyx_PyThreadState_assign
-        if (!__Pyx_PyErr_Occurred()) {
-            PyObject *exc = PyExc_StopIteration;
-            #ifdef __Pyx_AsyncGen_USED
-            if (__Pyx_AsyncGen_CheckExact(gen))
-                exc = __Pyx_PyExc_StopAsyncIteration;
-            #endif
-            __Pyx_PyErr_SetNone(exc);
-        }
-    }
-    return retval;
-}
-static CYTHON_INLINE
-PyObject *__Pyx_Coroutine_FinishDelegation(__pyx_CoroutineObject *gen) {
-    PyObject *ret;
-    PyObject *val = NULL;
-    __Pyx_Coroutine_Undelegate(gen);
-    __Pyx_PyGen__FetchStopIterationValue(__Pyx_PyThreadState_Current, &val);
-    ret = __Pyx_Coroutine_SendEx(gen, val, 0);
-    Py_XDECREF(val);
-    return ret;
-}
-static PyObject *__Pyx_Coroutine_Send(PyObject *self, PyObject *value) {
-    PyObject *retval;
-    __pyx_CoroutineObject *gen = (__pyx_CoroutineObject*) self;
-    PyObject *yf = gen->yieldfrom;
-    if (unlikely(gen->is_running))
-        return __Pyx_Coroutine_AlreadyRunningError(gen);
-    if (yf) {
-        PyObject *ret;
-        gen->is_running = 1;
-        #ifdef __Pyx_Generator_USED
-        if (__Pyx_Generator_CheckExact(yf)) {
-            ret = __Pyx_Coroutine_Send(yf, value);
-        } else
-        #endif
-        #ifdef __Pyx_Coroutine_USED
-        if (__Pyx_Coroutine_Check(yf)) {
-            ret = __Pyx_Coroutine_Send(yf, value);
-        } else
-        #endif
-        #ifdef __Pyx_AsyncGen_USED
-        if (__pyx_PyAsyncGenASend_CheckExact(yf)) {
-            ret = __Pyx_async_gen_asend_send(yf, value);
-        } else
-        #endif
-        #if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x03030000 && (defined(__linux__) || PY_VERSION_HEX >= 0x030600B3)
-        if (PyGen_CheckExact(yf)) {
-            ret = _PyGen_Send((PyGenObject*)yf, value == Py_None ? NULL : value);
-        } else
-        #endif
-        #if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x03050000 && defined(PyCoro_CheckExact) && (defined(__linux__) || PY_VERSION_HEX >= 0x030600B3)
-        if (PyCoro_CheckExact(yf)) {
-            ret = _PyGen_Send((PyGenObject*)yf, value == Py_None ? NULL : value);
-        } else
-        #endif
-        {
-            if (value == Py_None)
-                ret = Py_TYPE(yf)->tp_iternext(yf);
-            else
-                ret = __Pyx_PyObject_CallMethod1(yf, __pyx_n_s_send, value);
-        }
-        gen->is_running = 0;
-        if (likely(ret)) {
-            return ret;
-        }
-        retval = __Pyx_Coroutine_FinishDelegation(gen);
-    } else {
-        retval = __Pyx_Coroutine_SendEx(gen, value, 0);
-    }
-    return __Pyx_Coroutine_MethodReturn(self, retval);
-}
-static int __Pyx_Coroutine_CloseIter(__pyx_CoroutineObject *gen, PyObject *yf) {
-    PyObject *retval = NULL;
-    int err = 0;
-    #ifdef __Pyx_Generator_USED
-    if (__Pyx_Generator_CheckExact(yf)) {
-        retval = __Pyx_Coroutine_Close(yf);
-        if (!retval)
-            return -1;
-    } else
-    #endif
-    #ifdef __Pyx_Coroutine_USED
-    if (__Pyx_Coroutine_Check(yf)) {
-        retval = __Pyx_Coroutine_Close(yf);
-        if (!retval)
-            return -1;
-    } else
-    if (__Pyx_CoroutineAwait_CheckExact(yf)) {
-        retval = __Pyx_CoroutineAwait_Close((__pyx_CoroutineAwaitObject*)yf);
-        if (!retval)
-            return -1;
-    } else
-    #endif
-    #ifdef __Pyx_AsyncGen_USED
-    if (__pyx_PyAsyncGenASend_CheckExact(yf)) {
-        retval = __Pyx_async_gen_asend_close(yf, NULL);
-    } else
-    if (__pyx_PyAsyncGenAThrow_CheckExact(yf)) {
-        retval = __Pyx_async_gen_athrow_close(yf, NULL);
-    } else
-    #endif
-    {
-        PyObject *meth;
-        gen->is_running = 1;
-        meth = __Pyx_PyObject_GetAttrStr(yf, __pyx_n_s_close);
-        if (unlikely(!meth)) {
-            if (!PyErr_ExceptionMatches(PyExc_AttributeError)) {
-                PyErr_WriteUnraisable(yf);
-            }
-            PyErr_Clear();
-        } else {
-            retval = PyObject_CallFunction(meth, NULL);
-            Py_DECREF(meth);
-            if (!retval)
-                err = -1;
-        }
-        gen->is_running = 0;
-    }
-    Py_XDECREF(retval);
-    return err;
-}
-static PyObject *__Pyx_Generator_Next(PyObject *self) {
-    __pyx_CoroutineObject *gen = (__pyx_CoroutineObject*) self;
-    PyObject *yf = gen->yieldfrom;
-    if (unlikely(gen->is_running))
-        return __Pyx_Coroutine_AlreadyRunningError(gen);
-    if (yf) {
-        PyObject *ret;
-        gen->is_running = 1;
-        #ifdef __Pyx_Generator_USED
-        if (__Pyx_Generator_CheckExact(yf)) {
-            ret = __Pyx_Generator_Next(yf);
-        } else
-        #endif
-        #if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x03030000 && (defined(__linux__) || PY_VERSION_HEX >= 0x030600B3)
-        if (PyGen_CheckExact(yf)) {
-            ret = _PyGen_Send((PyGenObject*)yf, NULL);
-        } else
-        #endif
-        #ifdef __Pyx_Coroutine_USED
-        if (__Pyx_Coroutine_Check(yf)) {
-            ret = __Pyx_Coroutine_Send(yf, Py_None);
-        } else
-        #endif
-            ret = Py_TYPE(yf)->tp_iternext(yf);
-        gen->is_running = 0;
-        if (likely(ret)) {
-            return ret;
-        }
-        return __Pyx_Coroutine_FinishDelegation(gen);
-    }
-    return __Pyx_Coroutine_SendEx(gen, Py_None, 0);
-}
-static PyObject *__Pyx_Coroutine_Close(PyObject *self) {
-    __pyx_CoroutineObject *gen = (__pyx_CoroutineObject *) self;
-    PyObject *retval, *raised_exception;
-    PyObject *yf = gen->yieldfrom;
-    int err = 0;
-    if (unlikely(gen->is_running))
-        return __Pyx_Coroutine_AlreadyRunningError(gen);
-    if (yf) {
-        Py_INCREF(yf);
-        err = __Pyx_Coroutine_CloseIter(gen, yf);
-        __Pyx_Coroutine_Undelegate(gen);
-        Py_DECREF(yf);
-    }
-    if (err == 0)
-        PyErr_SetNone(PyExc_GeneratorExit);
-    retval = __Pyx_Coroutine_SendEx(gen, NULL, 1);
-    if (unlikely(retval)) {
-        const char *msg;
-        Py_DECREF(retval);
-        if ((0)) {
-        #ifdef __Pyx_Coroutine_USED
-        } else if (__Pyx_Coroutine_Check(self)) {
-            msg = "coroutine ignored GeneratorExit";
-        #endif
-        #ifdef __Pyx_AsyncGen_USED
-        } else if (__Pyx_AsyncGen_CheckExact(self)) {
-#if PY_VERSION_HEX < 0x03060000
-            msg = "async generator ignored GeneratorExit - might require Python 3.6+ finalisation (PEP 525)";
-#else
-            msg = "async generator ignored GeneratorExit";
-#endif
-        #endif
-        } else {
-            msg = "generator ignored GeneratorExit";
-        }
-        PyErr_SetString(PyExc_RuntimeError, msg);
-        return NULL;
-    }
-    raised_exception = PyErr_Occurred();
-    if (likely(!raised_exception || __Pyx_PyErr_GivenExceptionMatches2(raised_exception, PyExc_GeneratorExit, PyExc_StopIteration))) {
-        if (raised_exception) PyErr_Clear();
-        Py_INCREF(Py_None);
-        return Py_None;
-    }
-    return NULL;
-}
-static PyObject *__Pyx__Coroutine_Throw(PyObject *self, PyObject *typ, PyObject *val, PyObject *tb,
-                                        PyObject *args, int close_on_genexit) {
-    __pyx_CoroutineObject *gen = (__pyx_CoroutineObject *) self;
-    PyObject *yf = gen->yieldfrom;
-    if (unlikely(gen->is_running))
-        return __Pyx_Coroutine_AlreadyRunningError(gen);
-    if (yf) {
-        PyObject *ret;
-        Py_INCREF(yf);
-        if (__Pyx_PyErr_GivenExceptionMatches(typ, PyExc_GeneratorExit) && close_on_genexit) {
-            int err = __Pyx_Coroutine_CloseIter(gen, yf);
-            Py_DECREF(yf);
-            __Pyx_Coroutine_Undelegate(gen);
-            if (err < 0)
-                return __Pyx_Coroutine_MethodReturn(self, __Pyx_Coroutine_SendEx(gen, NULL, 0));
-            goto throw_here;
-        }
-        gen->is_running = 1;
-        if (0
-        #ifdef __Pyx_Generator_USED
-            || __Pyx_Generator_CheckExact(yf)
-        #endif
-        #ifdef __Pyx_Coroutine_USED
-            || __Pyx_Coroutine_Check(yf)
-        #endif
-            ) {
-            ret = __Pyx__Coroutine_Throw(yf, typ, val, tb, args, close_on_genexit);
-        #ifdef __Pyx_Coroutine_USED
-        } else if (__Pyx_CoroutineAwait_CheckExact(yf)) {
-            ret = __Pyx__Coroutine_Throw(((__pyx_CoroutineAwaitObject*)yf)->coroutine, typ, val, tb, args, close_on_genexit);
-        #endif
-        } else {
-            PyObject *meth = __Pyx_PyObject_GetAttrStr(yf, __pyx_n_s_throw);
-            if (unlikely(!meth)) {
-                Py_DECREF(yf);
-                if (!PyErr_ExceptionMatches(PyExc_AttributeError)) {
-                    gen->is_running = 0;
-                    return NULL;
-                }
-                PyErr_Clear();
-                __Pyx_Coroutine_Undelegate(gen);
-                gen->is_running = 0;
-                goto throw_here;
-            }
-            if (likely(args)) {
-                ret = PyObject_CallObject(meth, args);
-            } else {
-                ret = PyObject_CallFunctionObjArgs(meth, typ, val, tb, NULL);
-            }
-            Py_DECREF(meth);
-        }
-        gen->is_running = 0;
-        Py_DECREF(yf);
-        if (!ret) {
-            ret = __Pyx_Coroutine_FinishDelegation(gen);
-        }
-        return __Pyx_Coroutine_MethodReturn(self, ret);
-    }
-throw_here:
-    __Pyx_Raise(typ, val, tb, NULL);
-    return __Pyx_Coroutine_MethodReturn(self, __Pyx_Coroutine_SendEx(gen, NULL, 0));
-}
-static PyObject *__Pyx_Coroutine_Throw(PyObject *self, PyObject *args) {
-    PyObject *typ;
-    PyObject *val = NULL;
-    PyObject *tb = NULL;
-    if (!PyArg_UnpackTuple(args, (char *)"throw", 1, 3, &typ, &val, &tb))
-        return NULL;
-    return __Pyx__Coroutine_Throw(self, typ, val, tb, args, 1);
-}
-static int __Pyx_Coroutine_traverse(__pyx_CoroutineObject *gen, visitproc visit, void *arg) {
-    Py_VISIT(gen->closure);
-    Py_VISIT(gen->classobj);
-    Py_VISIT(gen->yieldfrom);
-    Py_VISIT(gen->exc_type);
-    Py_VISIT(gen->exc_value);
-    Py_VISIT(gen->exc_traceback);
-    return 0;
-}
-static int __Pyx_Coroutine_clear(PyObject *self) {
-    __pyx_CoroutineObject *gen = (__pyx_CoroutineObject *) self;
-    Py_CLEAR(gen->closure);
-    Py_CLEAR(gen->classobj);
-    Py_CLEAR(gen->yieldfrom);
-    Py_CLEAR(gen->exc_type);
-    Py_CLEAR(gen->exc_value);
-    Py_CLEAR(gen->exc_traceback);
-#ifdef __Pyx_AsyncGen_USED
-    if (__Pyx_AsyncGen_CheckExact(self)) {
-        Py_CLEAR(((__pyx_PyAsyncGenObject*)gen)->ag_finalizer);
-    }
-#endif
-    Py_CLEAR(gen->gi_code);
-    Py_CLEAR(gen->gi_name);
-    Py_CLEAR(gen->gi_qualname);
-    Py_CLEAR(gen->gi_modulename);
-    return 0;
-}
-static void __Pyx_Coroutine_dealloc(PyObject *self) {
-    __pyx_CoroutineObject *gen = (__pyx_CoroutineObject *) self;
-    PyObject_GC_UnTrack(gen);
-    if (gen->gi_weakreflist != NULL)
-        PyObject_ClearWeakRefs(self);
-    if (gen->resume_label >= 0) {
-        PyObject_GC_Track(self);
-#if PY_VERSION_HEX >= 0x030400a1 && CYTHON_USE_TP_FINALIZE
-        if (PyObject_CallFinalizerFromDealloc(self))
-#else
-        Py_TYPE(gen)->tp_del(self);
-        if (self->ob_refcnt > 0)
-#endif
-        {
-            return;
-        }
-        PyObject_GC_UnTrack(self);
-    }
-#ifdef __Pyx_AsyncGen_USED
-    if (__Pyx_AsyncGen_CheckExact(self)) {
-        /* We have to handle this case for asynchronous generators
-           right here, because this code has to be between UNTRACK
-           and GC_Del. */
-        Py_CLEAR(((__pyx_PyAsyncGenObject*)self)->ag_finalizer);
-    }
-#endif
-    __Pyx_Coroutine_clear(self);
-    PyObject_GC_Del(gen);
-}
-static void __Pyx_Coroutine_del(PyObject *self) {
-    PyObject *error_type, *error_value, *error_traceback;
-    __pyx_CoroutineObject *gen = (__pyx_CoroutineObject *) self;
-    __Pyx_PyThreadState_declare
-    if (gen->resume_label < 0) {
-        return;
-    }
-#if !CYTHON_USE_TP_FINALIZE
-    assert(self->ob_refcnt == 0);
-    self->ob_refcnt = 1;
-#endif
-    __Pyx_PyThreadState_assign
-    __Pyx_ErrFetch(&error_type, &error_value, &error_traceback);
-#ifdef __Pyx_AsyncGen_USED
-    if (__Pyx_AsyncGen_CheckExact(self)) {
-        __pyx_PyAsyncGenObject *agen = (__pyx_PyAsyncGenObject*)self;
-        PyObject *finalizer = agen->ag_finalizer;
-        if (finalizer && !agen->ag_closed) {
-            PyObject *res = __Pyx_PyObject_CallOneArg(finalizer, self);
-            if (unlikely(!res)) {
-                PyErr_WriteUnraisable(self);
-            } else {
-                Py_DECREF(res);
-            }
-            __Pyx_ErrRestore(error_type, error_value, error_traceback);
-            return;
-        }
-    }
-#endif
-    if (unlikely(gen->resume_label == 0 && !error_value)) {
-#ifdef __Pyx_Coroutine_USED
-#ifdef __Pyx_Generator_USED
-    if (!__Pyx_Generator_CheckExact(self))
-#endif
-        {
-        PyObject_GC_UnTrack(self);
-#if PY_MAJOR_VERSION >= 3  || defined(PyErr_WarnFormat)
-        if (unlikely(PyErr_WarnFormat(PyExc_RuntimeWarning, 1, "coroutine '%.50S' was never awaited", gen->gi_qualname) < 0))
-            PyErr_WriteUnraisable(self);
-#else
-        {PyObject *msg;
-        char *cmsg;
-        #if CYTHON_COMPILING_IN_PYPY
-        msg = NULL;
-        cmsg = (char*) "coroutine was never awaited";
-        #else
-        char *cname;
-        PyObject *qualname;
-        qualname = gen->gi_qualname;
-        cname = PyString_AS_STRING(qualname);
-        msg = PyString_FromFormat("coroutine '%.50s' was never awaited", cname);
-        if (unlikely(!msg)) {
-            PyErr_Clear();
-            cmsg = (char*) "coroutine was never awaited";
-        } else {
-            cmsg = PyString_AS_STRING(msg);
-        }
-        #endif
-        if (unlikely(PyErr_WarnEx(PyExc_RuntimeWarning, cmsg, 1) < 0))
-            PyErr_WriteUnraisable(self);
-        Py_XDECREF(msg);}
-#endif
-        PyObject_GC_Track(self);
-        }
-#endif
-    } else {
-        PyObject *res = __Pyx_Coroutine_Close(self);
-        if (unlikely(!res)) {
-            if (PyErr_Occurred())
-                PyErr_WriteUnraisable(self);
-        } else {
-            Py_DECREF(res);
-        }
-    }
-    __Pyx_ErrRestore(error_type, error_value, error_traceback);
-#if !CYTHON_USE_TP_FINALIZE
-    assert(self->ob_refcnt > 0);
-    if (--self->ob_refcnt == 0) {
-        return;
-    }
-    {
-        Py_ssize_t refcnt = self->ob_refcnt;
-        _Py_NewReference(self);
-        self->ob_refcnt = refcnt;
-    }
-#if CYTHON_COMPILING_IN_CPYTHON
-    assert(PyType_IS_GC(self->ob_type) &&
-           _Py_AS_GC(self)->gc.gc_refs != _PyGC_REFS_UNTRACKED);
-    _Py_DEC_REFTOTAL;
-#endif
-#ifdef COUNT_ALLOCS
-    --Py_TYPE(self)->tp_frees;
-    --Py_TYPE(self)->tp_allocs;
-#endif
-#endif
-}
-static PyObject *
-__Pyx_Coroutine_get_name(__pyx_CoroutineObject *self)
-{
-    PyObject *name = self->gi_name;
-    if (unlikely(!name)) name = Py_None;
-    Py_INCREF(name);
-    return name;
-}
-static int
-__Pyx_Coroutine_set_name(__pyx_CoroutineObject *self, PyObject *value)
-{
-    PyObject *tmp;
-#if PY_MAJOR_VERSION >= 3
-    if (unlikely(value == NULL || !PyUnicode_Check(value))) {
-#else
-    if (unlikely(value == NULL || !PyString_Check(value))) {
-#endif
-        PyErr_SetString(PyExc_TypeError,
-                        "__name__ must be set to a string object");
-        return -1;
-    }
-    tmp = self->gi_name;
-    Py_INCREF(value);
-    self->gi_name = value;
-    Py_XDECREF(tmp);
-    return 0;
-}
-static PyObject *
-__Pyx_Coroutine_get_qualname(__pyx_CoroutineObject *self)
-{
-    PyObject *name = self->gi_qualname;
-    if (unlikely(!name)) name = Py_None;
-    Py_INCREF(name);
-    return name;
-}
-static int
-__Pyx_Coroutine_set_qualname(__pyx_CoroutineObject *self, PyObject *value)
-{
-    PyObject *tmp;
-#if PY_MAJOR_VERSION >= 3
-    if (unlikely(value == NULL || !PyUnicode_Check(value))) {
-#else
-    if (unlikely(value == NULL || !PyString_Check(value))) {
-#endif
-        PyErr_SetString(PyExc_TypeError,
-                        "__qualname__ must be set to a string object");
-        return -1;
-    }
-    tmp = self->gi_qualname;
-    Py_INCREF(value);
-    self->gi_qualname = value;
-    Py_XDECREF(tmp);
-    return 0;
-}
-static __pyx_CoroutineObject *__Pyx__Coroutine_New(
-            PyTypeObject* type, __pyx_coroutine_body_t body, PyObject *code, PyObject *closure,
-            PyObject *name, PyObject *qualname, PyObject *module_name) {
-    __pyx_CoroutineObject *gen = PyObject_GC_New(__pyx_CoroutineObject, type);
-    if (unlikely(!gen))
-        return NULL;
-    return __Pyx__Coroutine_NewInit(gen, body, code, closure, name, qualname, module_name);
-}
-static __pyx_CoroutineObject *__Pyx__Coroutine_NewInit(
-            __pyx_CoroutineObject *gen, __pyx_coroutine_body_t body, PyObject *code, PyObject *closure,
-            PyObject *name, PyObject *qualname, PyObject *module_name) {
-    gen->body = body;
-    gen->closure = closure;
-    Py_XINCREF(closure);
-    gen->is_running = 0;
-    gen->resume_label = 0;
-    gen->classobj = NULL;
-    gen->yieldfrom = NULL;
-    gen->exc_type = NULL;
-    gen->exc_value = NULL;
-    gen->exc_traceback = NULL;
-    gen->gi_weakreflist = NULL;
-    Py_XINCREF(qualname);
-    gen->gi_qualname = qualname;
-    Py_XINCREF(name);
-    gen->gi_name = name;
-    Py_XINCREF(module_name);
-    gen->gi_modulename = module_name;
-    Py_XINCREF(code);
-    gen->gi_code = code;
-    PyObject_GC_Track(gen);
-    return gen;
-}
-
-/* PatchModuleWithCoroutine */
-                static PyObject* __Pyx_Coroutine_patch_module(PyObject* module, const char* py_code) {
-#if defined(__Pyx_Generator_USED) || defined(__Pyx_Coroutine_USED)
-    int result;
-    PyObject *globals, *result_obj;
-    globals = PyDict_New();  if (unlikely(!globals)) goto ignore;
-    result = PyDict_SetItemString(globals, "_cython_coroutine_type",
-    #ifdef __Pyx_Coroutine_USED
-        (PyObject*)__pyx_CoroutineType);
-    #else
-        Py_None);
-    #endif
-    if (unlikely(result < 0)) goto ignore;
-    result = PyDict_SetItemString(globals, "_cython_generator_type",
-    #ifdef __Pyx_Generator_USED
-        (PyObject*)__pyx_GeneratorType);
-    #else
-        Py_None);
-    #endif
-    if (unlikely(result < 0)) goto ignore;
-    if (unlikely(PyDict_SetItemString(globals, "_module", module) < 0)) goto ignore;
-    if (unlikely(PyDict_SetItemString(globals, "__builtins__", __pyx_b) < 0)) goto ignore;
-    result_obj = PyRun_String(py_code, Py_file_input, globals, globals);
-    if (unlikely(!result_obj)) goto ignore;
-    Py_DECREF(result_obj);
-    Py_DECREF(globals);
-    return module;
-ignore:
-    Py_XDECREF(globals);
-    PyErr_WriteUnraisable(module);
-    if (unlikely(PyErr_WarnEx(PyExc_RuntimeWarning, "Cython module failed to patch module with custom type", 1) < 0)) {
-        Py_DECREF(module);
-        module = NULL;
-    }
-#else
-    py_code++;
-#endif
-    return module;
-}
-
-/* PatchGeneratorABC */
-                #ifndef CYTHON_REGISTER_ABCS
-#define CYTHON_REGISTER_ABCS 1
-#endif
-#if defined(__Pyx_Generator_USED) || defined(__Pyx_Coroutine_USED)
-static PyObject* __Pyx_patch_abc_module(PyObject *module);
-static PyObject* __Pyx_patch_abc_module(PyObject *module) {
-    module = __Pyx_Coroutine_patch_module(
-        module, ""
-"if _cython_generator_type is not None:\n"
-"    try: Generator = _module.Generator\n"
-"    except AttributeError: pass\n"
-"    else: Generator.register(_cython_generator_type)\n"
-"if _cython_coroutine_type is not None:\n"
-"    try: Coroutine = _module.Coroutine\n"
-"    except AttributeError: pass\n"
-"    else: Coroutine.register(_cython_coroutine_type)\n"
-    );
-    return module;
-}
-#endif
-static int __Pyx_patch_abc(void) {
-#if defined(__Pyx_Generator_USED) || defined(__Pyx_Coroutine_USED)
-    static int abc_patched = 0;
-    if (CYTHON_REGISTER_ABCS && !abc_patched) {
-        PyObject *module;
-        module = PyImport_ImportModule((PY_MAJOR_VERSION >= 3) ? "collections.abc" : "collections");
-        if (!module) {
-            PyErr_WriteUnraisable(NULL);
-            if (unlikely(PyErr_WarnEx(PyExc_RuntimeWarning,
-                    ((PY_MAJOR_VERSION >= 3) ?
-                        "Cython module failed to register with collections.abc module" :
-                        "Cython module failed to register with collections module"), 1) < 0)) {
-                return -1;
-            }
-        } else {
-            module = __Pyx_patch_abc_module(module);
-            abc_patched = 1;
-            if (unlikely(!module))
-                return -1;
-            Py_DECREF(module);
-        }
-        module = PyImport_ImportModule("backports_abc");
-        if (module) {
-            module = __Pyx_patch_abc_module(module);
-            Py_XDECREF(module);
-        }
-        if (!module) {
-            PyErr_Clear();
-        }
-    }
-#else
-    if ((0)) __Pyx_Coroutine_patch_module(NULL, NULL);
-#endif
-    return 0;
-}
-
-/* Generator */
-                static PyMethodDef __pyx_Generator_methods[] = {
-    {"send", (PyCFunction) __Pyx_Coroutine_Send, METH_O,
-     (char*) PyDoc_STR("send(arg) -> send 'arg' into generator,\nreturn next yielded value or raise StopIteration.")},
-    {"throw", (PyCFunction) __Pyx_Coroutine_Throw, METH_VARARGS,
-     (char*) PyDoc_STR("throw(typ[,val[,tb]]) -> raise exception in generator,\nreturn next yielded value or raise StopIteration.")},
-    {"close", (PyCFunction) __Pyx_Coroutine_Close, METH_NOARGS,
-     (char*) PyDoc_STR("close() -> raise GeneratorExit inside generator.")},
-    {0, 0, 0, 0}
-};
-static PyMemberDef __pyx_Generator_memberlist[] = {
-    {(char *) "gi_running", T_BOOL, offsetof(__pyx_CoroutineObject, is_running), READONLY, NULL},
-    {(char*) "gi_yieldfrom", T_OBJECT, offsetof(__pyx_CoroutineObject, yieldfrom), READONLY,
-     (char*) PyDoc_STR("object being iterated by 'yield from', or None")},
-    {(char*) "gi_code", T_OBJECT, offsetof(__pyx_CoroutineObject, gi_code), READONLY, NULL},
-    {0, 0, 0, 0, 0}
-};
-static PyGetSetDef __pyx_Generator_getsets[] = {
-    {(char *) "__name__", (getter)__Pyx_Coroutine_get_name, (setter)__Pyx_Coroutine_set_name,
-     (char*) PyDoc_STR("name of the generator"), 0},
-    {(char *) "__qualname__", (getter)__Pyx_Coroutine_get_qualname, (setter)__Pyx_Coroutine_set_qualname,
-     (char*) PyDoc_STR("qualified name of the generator"), 0},
-    {0, 0, 0, 0, 0}
-};
-static PyTypeObject __pyx_GeneratorType_type = {
-    PyVarObject_HEAD_INIT(0, 0)
-    "generator",
-    sizeof(__pyx_CoroutineObject),
-    0,
-    (destructor) __Pyx_Coroutine_dealloc,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | Py_TPFLAGS_HAVE_FINALIZE,
-    0,
-    (traverseproc) __Pyx_Coroutine_traverse,
-    0,
-    0,
-    offsetof(__pyx_CoroutineObject, gi_weakreflist),
-    0,
-    (iternextfunc) __Pyx_Generator_Next,
-    __pyx_Generator_methods,
-    __pyx_Generator_memberlist,
-    __pyx_Generator_getsets,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-    0,
-#if CYTHON_USE_TP_FINALIZE
-    0,
-#else
-    __Pyx_Coroutine_del,
-#endif
-    0,
-#if CYTHON_USE_TP_FINALIZE
-    __Pyx_Coroutine_del,
-#elif PY_VERSION_HEX >= 0x030400a1
-    0,
-#endif
-};
-static int __pyx_Generator_init(void) {
-    __pyx_GeneratorType_type.tp_getattro = __Pyx_PyObject_GenericGetAttrNoDict;
-    __pyx_GeneratorType_type.tp_iter = PyObject_SelfIter;
-    __pyx_GeneratorType = __Pyx_FetchCommonType(&__pyx_GeneratorType_type);
-    if (unlikely(!__pyx_GeneratorType)) {
-        return -1;
-    }
-    return 0;
-}
-
-/* CheckBinaryVersion */
-                static int __Pyx_check_binary_version(void) {
-    char ctversion[4], rtversion[4];
-    PyOS_snprintf(ctversion, 4, "%d.%d", PY_MAJOR_VERSION, PY_MINOR_VERSION);
-    PyOS_snprintf(rtversion, 4, "%s", Py_GetVersion());
-    if (ctversion[0] != rtversion[0] || ctversion[2] != rtversion[2]) {
-        char message[200];
-        PyOS_snprintf(message, sizeof(message),
-                      "compiletime version %s of module '%.100s' "
-                      "does not match runtime version %s",
-                      ctversion, __Pyx_MODULE_NAME, rtversion);
-        return PyErr_WarnEx(NULL, message, 1);
-    }
-    return 0;
-}
-
-/* ModuleImport */
-                #ifndef __PYX_HAVE_RT_ImportModule
-#define __PYX_HAVE_RT_ImportModule
-static PyObject *__Pyx_ImportModule(const char *name) {
-    PyObject *py_name = 0;
-    PyObject *py_module = 0;
-    py_name = __Pyx_PyIdentifier_FromString(name);
-    if (!py_name)
-        goto bad;
-    py_module = PyImport_Import(py_name);
-    Py_DECREF(py_name);
-    return py_module;
-bad:
-    Py_XDECREF(py_name);
-    return 0;
-}
-#endif
-
-/* TypeImport */
-                #ifndef __PYX_HAVE_RT_ImportType
-#define __PYX_HAVE_RT_ImportType
-static PyTypeObject *__Pyx_ImportType(const char *module_name, const char *class_name,
-    size_t size, int strict)
-{
-    PyObject *py_module = 0;
-    PyObject *result = 0;
-    PyObject *py_name = 0;
-    char warning[200];
-    Py_ssize_t basicsize;
-#ifdef Py_LIMITED_API
-    PyObject *py_basicsize;
-#endif
-    py_module = __Pyx_ImportModule(module_name);
-    if (!py_module)
-        goto bad;
-    py_name = __Pyx_PyIdentifier_FromString(class_name);
-    if (!py_name)
-        goto bad;
-    result = PyObject_GetAttr(py_module, py_name);
-    Py_DECREF(py_name);
-    py_name = 0;
-    Py_DECREF(py_module);
-    py_module = 0;
-    if (!result)
-        goto bad;
-    if (!PyType_Check(result)) {
-        PyErr_Format(PyExc_TypeError,
-            "%.200s.%.200s is not a type object",
-            module_name, class_name);
-        goto bad;
-    }
-#ifndef Py_LIMITED_API
-    basicsize = ((PyTypeObject *)result)->tp_basicsize;
-#else
-    py_basicsize = PyObject_GetAttrString(result, "__basicsize__");
-    if (!py_basicsize)
-        goto bad;
-    basicsize = PyLong_AsSsize_t(py_basicsize);
-    Py_DECREF(py_basicsize);
-    py_basicsize = 0;
-    if (basicsize == (Py_ssize_t)-1 && PyErr_Occurred())
-        goto bad;
-#endif
-    if (!strict && (size_t)basicsize > size) {
-        PyOS_snprintf(warning, sizeof(warning),
-            "%s.%s size changed, may indicate binary incompatibility. Expected %zd, got %zd",
-            module_name, class_name, basicsize, size);
-        if (PyErr_WarnEx(NULL, warning, 0) < 0) goto bad;
-    }
-    else if ((size_t)basicsize != size) {
-        PyErr_Format(PyExc_ValueError,
-            "%.200s.%.200s has the wrong size, try recompiling. Expected %zd, got %zd",
-            module_name, class_name, basicsize, size);
-        goto bad;
-    }
-    return (PyTypeObject *)result;
-bad:
-    Py_XDECREF(py_module);
-    Py_XDECREF(result);
-    return NULL;
-}
-#endif
-
-/* VoidPtrImport */
-                #ifndef __PYX_HAVE_RT_ImportVoidPtr
-#define __PYX_HAVE_RT_ImportVoidPtr
-static int __Pyx_ImportVoidPtr(PyObject *module, const char *name, void **p, const char *sig) {
-    PyObject *d = 0;
-    PyObject *cobj = 0;
-    d = PyObject_GetAttrString(module, (char *)"__pyx_capi__");
-    if (!d)
-        goto bad;
-    cobj = PyDict_GetItemString(d, name);
-    if (!cobj) {
-        PyErr_Format(PyExc_ImportError,
-            "%.200s does not export expected C variable %.200s",
-                PyModule_GetName(module), name);
-        goto bad;
-    }
-#if PY_VERSION_HEX >= 0x02070000
-    if (!PyCapsule_IsValid(cobj, sig)) {
-        PyErr_Format(PyExc_TypeError,
-            "C variable %.200s.%.200s has wrong signature (expected %.500s, got %.500s)",
-             PyModule_GetName(module), name, sig, PyCapsule_GetName(cobj));
-        goto bad;
-    }
-    *p = PyCapsule_GetPointer(cobj, sig);
-#else
-    {const char *desc, *s1, *s2;
-    desc = (const char *)PyCObject_GetDesc(cobj);
-    if (!desc)
-        goto bad;
-    s1 = desc; s2 = sig;
-    while (*s1 != '\0' && *s1 == *s2) { s1++; s2++; }
-    if (*s1 != *s2) {
-        PyErr_Format(PyExc_TypeError,
-            "C variable %.200s.%.200s has wrong signature (expected %.500s, got %.500s)",
-             PyModule_GetName(module), name, sig, desc);
-        goto bad;
-    }
-    *p = PyCObject_AsVoidPtr(cobj);}
-#endif
-    if (!(*p))
-        goto bad;
-    Py_DECREF(d);
-    return 0;
-bad:
-    Py_XDECREF(d);
-    return -1;
-}
-#endif
-
-/* FunctionImport */
-                #ifndef __PYX_HAVE_RT_ImportFunction
-#define __PYX_HAVE_RT_ImportFunction
-static int __Pyx_ImportFunction(PyObject *module, const char *funcname, void (**f)(void), const char *sig) {
-    PyObject *d = 0;
-    PyObject *cobj = 0;
-    union {
-        void (*fp)(void);
-        void *p;
-    } tmp;
-    d = PyObject_GetAttrString(module, (char *)"__pyx_capi__");
-    if (!d)
-        goto bad;
-    cobj = PyDict_GetItemString(d, funcname);
-    if (!cobj) {
-        PyErr_Format(PyExc_ImportError,
-            "%.200s does not export expected C function %.200s",
-                PyModule_GetName(module), funcname);
-        goto bad;
-    }
-#if PY_VERSION_HEX >= 0x02070000
-    if (!PyCapsule_IsValid(cobj, sig)) {
-        PyErr_Format(PyExc_TypeError,
-            "C function %.200s.%.200s has wrong signature (expected %.500s, got %.500s)",
-             PyModule_GetName(module), funcname, sig, PyCapsule_GetName(cobj));
-        goto bad;
-    }
-    tmp.p = PyCapsule_GetPointer(cobj, sig);
-#else
-    {const char *desc, *s1, *s2;
-    desc = (const char *)PyCObject_GetDesc(cobj);
-    if (!desc)
-        goto bad;
-    s1 = desc; s2 = sig;
-    while (*s1 != '\0' && *s1 == *s2) { s1++; s2++; }
-    if (*s1 != *s2) {
-        PyErr_Format(PyExc_TypeError,
-            "C function %.200s.%.200s has wrong signature (expected %.500s, got %.500s)",
-             PyModule_GetName(module), funcname, sig, desc);
-        goto bad;
-    }
-    tmp.p = PyCObject_AsVoidPtr(cobj);}
-#endif
-    *f = tmp.fp;
-    if (!(*f))
-        goto bad;
-    Py_DECREF(d);
-    return 0;
-bad:
-    Py_XDECREF(d);
-    return -1;
-}
-#endif
-
-/* InitStrings */
-                static int __Pyx_InitStrings(__Pyx_StringTabEntry *t) {
-    while (t->p) {
-        #if PY_MAJOR_VERSION < 3
-        if (t->is_unicode) {
-            *t->p = PyUnicode_DecodeUTF8(t->s, t->n - 1, NULL);
-        } else if (t->intern) {
-            *t->p = PyString_InternFromString(t->s);
-        } else {
-            *t->p = PyString_FromStringAndSize(t->s, t->n - 1);
-        }
-        #else
-        if (t->is_unicode | t->is_str) {
-            if (t->intern) {
-                *t->p = PyUnicode_InternFromString(t->s);
-            } else if (t->encoding) {
-                *t->p = PyUnicode_Decode(t->s, t->n - 1, t->encoding, NULL);
-            } else {
-                *t->p = PyUnicode_FromStringAndSize(t->s, t->n - 1);
-            }
-        } else {
-            *t->p = PyBytes_FromStringAndSize(t->s, t->n - 1);
-        }
-        #endif
-        if (!*t->p)
-            return -1;
-        if (PyObject_Hash(*t->p) == -1)
-            return -1;
-        ++t;
-    }
-    return 0;
-}
-
-static CYTHON_INLINE PyObject* __Pyx_PyUnicode_FromString(const char* c_str) {
-    return __Pyx_PyUnicode_FromStringAndSize(c_str, (Py_ssize_t)strlen(c_str));
-}
-static CYTHON_INLINE const char* __Pyx_PyObject_AsString(PyObject* o) {
-    Py_ssize_t ignore;
-    return __Pyx_PyObject_AsStringAndSize(o, &ignore);
-}
-#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII || __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT
-#if !CYTHON_PEP393_ENABLED
-static const char* __Pyx_PyUnicode_AsStringAndSize(PyObject* o, Py_ssize_t *length) {
-    char* defenc_c;
-    PyObject* defenc = _PyUnicode_AsDefaultEncodedString(o, NULL);
-    if (!defenc) return NULL;
-    defenc_c = PyBytes_AS_STRING(defenc);
-#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII
-    {
-        char* end = defenc_c + PyBytes_GET_SIZE(defenc);
-        char* c;
-        for (c = defenc_c; c < end; c++) {
-            if ((unsigned char) (*c) >= 128) {
-                PyUnicode_AsASCIIString(o);
-                return NULL;
-            }
-        }
-    }
-#endif
-    *length = PyBytes_GET_SIZE(defenc);
-    return defenc_c;
-}
-#else
-static CYTHON_INLINE const char* __Pyx_PyUnicode_AsStringAndSize(PyObject* o, Py_ssize_t *length) {
-    if (unlikely(__Pyx_PyUnicode_READY(o) == -1)) return NULL;
-#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII
-    if (likely(PyUnicode_IS_ASCII(o))) {
-        *length = PyUnicode_GET_LENGTH(o);
-        return PyUnicode_AsUTF8(o);
-    } else {
-        PyUnicode_AsASCIIString(o);
-        return NULL;
-    }
-#else
-    return PyUnicode_AsUTF8AndSize(o, length);
-#endif
-}
-#endif
-#endif
-static CYTHON_INLINE const char* __Pyx_PyObject_AsStringAndSize(PyObject* o, Py_ssize_t *length) {
-#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII || __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT
-    if (
-#if PY_MAJOR_VERSION < 3 && __PYX_DEFAULT_STRING_ENCODING_IS_ASCII
-            __Pyx_sys_getdefaultencoding_not_ascii &&
-#endif
-            PyUnicode_Check(o)) {
-        return __Pyx_PyUnicode_AsStringAndSize(o, length);
-    } else
-#endif
-#if (!CYTHON_COMPILING_IN_PYPY) || (defined(PyByteArray_AS_STRING) && defined(PyByteArray_GET_SIZE))
-    if (PyByteArray_Check(o)) {
-        *length = PyByteArray_GET_SIZE(o);
-        return PyByteArray_AS_STRING(o);
-    } else
-#endif
-    {
-        char* result;
-        int r = PyBytes_AsStringAndSize(o, &result, length);
-        if (unlikely(r < 0)) {
-            return NULL;
-        } else {
-            return result;
-        }
-    }
-}
-static CYTHON_INLINE int __Pyx_PyObject_IsTrue(PyObject* x) {
-   int is_true = x == Py_True;
-   if (is_true | (x == Py_False) | (x == Py_None)) return is_true;
-   else return PyObject_IsTrue(x);
-}
-static PyObject* __Pyx_PyNumber_IntOrLongWrongResultType(PyObject* result, const char* type_name) {
-#if PY_MAJOR_VERSION >= 3
-    if (PyLong_Check(result)) {
-        if (PyErr_WarnFormat(PyExc_DeprecationWarning, 1,
-                "__int__ returned non-int (type %.200s).  "
-                "The ability to return an instance of a strict subclass of int "
-                "is deprecated, and may be removed in a future version of Python.",
-                Py_TYPE(result)->tp_name)) {
-            Py_DECREF(result);
-            return NULL;
-        }
-        return result;
-    }
-#endif
-    PyErr_Format(PyExc_TypeError,
-                 "__%.4s__ returned non-%.4s (type %.200s)",
-                 type_name, type_name, Py_TYPE(result)->tp_name);
-    Py_DECREF(result);
-    return NULL;
-}
-static CYTHON_INLINE PyObject* __Pyx_PyNumber_IntOrLong(PyObject* x) {
-#if CYTHON_USE_TYPE_SLOTS
-  PyNumberMethods *m;
-#endif
-  const char *name = NULL;
-  PyObject *res = NULL;
-#if PY_MAJOR_VERSION < 3
-  if (likely(PyInt_Check(x) || PyLong_Check(x)))
-#else
-  if (likely(PyLong_Check(x)))
-#endif
-    return __Pyx_NewRef(x);
-#if CYTHON_USE_TYPE_SLOTS
-  m = Py_TYPE(x)->tp_as_number;
-  #if PY_MAJOR_VERSION < 3
-  if (m && m->nb_int) {
-    name = "int";
-    res = m->nb_int(x);
-  }
-  else if (m && m->nb_long) {
-    name = "long";
-    res = m->nb_long(x);
-  }
-  #else
-  if (likely(m && m->nb_int)) {
-    name = "int";
-    res = m->nb_int(x);
-  }
-  #endif
-#else
-  if (!PyBytes_CheckExact(x) && !PyUnicode_CheckExact(x)) {
-    res = PyNumber_Int(x);
-  }
-#endif
-  if (likely(res)) {
-#if PY_MAJOR_VERSION < 3
-    if (unlikely(!PyInt_Check(res) && !PyLong_Check(res))) {
-#else
-    if (unlikely(!PyLong_CheckExact(res))) {
-#endif
-        return __Pyx_PyNumber_IntOrLongWrongResultType(res, name);
-    }
-  }
-  else if (!PyErr_Occurred()) {
-    PyErr_SetString(PyExc_TypeError,
-                    "an integer is required");
-  }
-  return res;
-}
-static CYTHON_INLINE Py_ssize_t __Pyx_PyIndex_AsSsize_t(PyObject* b) {
-  Py_ssize_t ival;
-  PyObject *x;
-#if PY_MAJOR_VERSION < 3
-  if (likely(PyInt_CheckExact(b))) {
-    if (sizeof(Py_ssize_t) >= sizeof(long))
-        return PyInt_AS_LONG(b);
-    else
-        return PyInt_AsSsize_t(x);
-  }
-#endif
-  if (likely(PyLong_CheckExact(b))) {
-    #if CYTHON_USE_PYLONG_INTERNALS
-    const digit* digits = ((PyLongObject*)b)->ob_digit;
-    const Py_ssize_t size = Py_SIZE(b);
-    if (likely(__Pyx_sst_abs(size) <= 1)) {
-        ival = likely(size) ? digits[0] : 0;
-        if (size == -1) ival = -ival;
-        return ival;
-    } else {
-      switch (size) {
-         case 2:
-           if (8 * sizeof(Py_ssize_t) > 2 * PyLong_SHIFT) {
-             return (Py_ssize_t) (((((size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-         case -2:
-           if (8 * sizeof(Py_ssize_t) > 2 * PyLong_SHIFT) {
-             return -(Py_ssize_t) (((((size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-         case 3:
-           if (8 * sizeof(Py_ssize_t) > 3 * PyLong_SHIFT) {
-             return (Py_ssize_t) (((((((size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-         case -3:
-           if (8 * sizeof(Py_ssize_t) > 3 * PyLong_SHIFT) {
-             return -(Py_ssize_t) (((((((size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-         case 4:
-           if (8 * sizeof(Py_ssize_t) > 4 * PyLong_SHIFT) {
-             return (Py_ssize_t) (((((((((size_t)digits[3]) << PyLong_SHIFT) | (size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-         case -4:
-           if (8 * sizeof(Py_ssize_t) > 4 * PyLong_SHIFT) {
-             return -(Py_ssize_t) (((((((((size_t)digits[3]) << PyLong_SHIFT) | (size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-      }
-    }
-    #endif
-    return PyLong_AsSsize_t(b);
-  }
-  x = PyNumber_Index(b);
-  if (!x) return -1;
-  ival = PyInt_AsSsize_t(x);
-  Py_DECREF(x);
-  return ival;
-}
-static CYTHON_INLINE PyObject * __Pyx_PyBool_FromLong(long b) {
-  return b ? __Pyx_NewRef(Py_True) : __Pyx_NewRef(Py_False);
-}
-static CYTHON_INLINE PyObject * __Pyx_PyInt_FromSize_t(size_t ival) {
-    return PyInt_FromSize_t(ival);
-}
-
-
-#endif /* Py_PYTHON_H */

lakesuperior/store/ldp_rs/lmdb_triplestore.pxd

@@ -0,0 +1,45 @@
+cimport lakesuperior.cy_include.collections as cc
+cimport lakesuperior.cy_include.cylmdb as lmdb
+
+from lakesuperior.model.base cimport Key, DoubleKey, TripleKey, Buffer
+from lakesuperior.model.rdf.graph cimport Graph
+from lakesuperior.model.structures.keyset cimport Keyset
+from lakesuperior.store.base_lmdb_store cimport BaseLmdbStore
+
+cdef:
+    enum:
+        IDX_OP_ADD = 1
+        IDX_OP_REMOVE = -1
+
+    unsigned char lookup_rank[3]
+    unsigned char lookup_ordering[3][3]
+    unsigned char lookup_ordering_2bound[3][3]
+
+
+
+cdef class LmdbTriplestore(BaseLmdbStore):
+    cpdef dict stats(self)
+    cpdef size_t _len(self, context=*) except -1
+    cpdef void add(self, triple, context=*, quoted=*) except *
+    cpdef void add_graph(self, graph) except *
+    cpdef void _remove(self, tuple triple_pattern, context=*) except *
+    cpdef void _remove_graph(self, object gr_uri) except *
+    cpdef tuple all_namespaces(self)
+    cpdef Graph triple_keys(self, tuple triple_pattern, context=*, uri=*)
+
+    cdef:
+        void _index_triple(self, int op, TripleKey spok) except *
+        void _all_term_keys(self, term_type, cc.HashSet** tkeys) except *
+        void lookup_term(self, const Key tk, Buffer* data) except *
+        Graph _lookup(self, tuple triple_pattern)
+        Graph _lookup_1bound(self, unsigned char idx, Key luk)
+        Graph _lookup_2bound(
+            self, unsigned char idx1, unsigned char idx2, DoubleKey tks
+        )
+        object from_key(self, const Key tk)
+        Key to_key(self, term) except? 0
+        void all_contexts(self, Key** ctx, size_t* sz, triple=*) except *
+        Key _append(
+                self, Buffer *value,
+                unsigned char *dblabel=*, lmdb.MDB_txn *txn=*,
+                unsigned int flags=*) except? 0

lakesuperior/store/ldp_rs/rsrc_centric_layout.py

@@ -9,7 +9,7 @@ from urllib.parse import urldefrag
 
 import arrow
 
-from rdflib import Dataset, Graph, Literal, URIRef, plugin
+from rdflib import Dataset, Literal, URIRef, plugin
 from rdflib.compare import to_isomorphic
 from rdflib.namespace import RDF
 from rdflib.query import ResultException
@@ -24,7 +24,7 @@ from lakesuperior.dictionaries.srv_mgd_terms import  srv_mgd_subjects, \
 from lakesuperior.globals import ROOT_RSRC_URI
 from lakesuperior.exceptions import (InvalidResourceError,
         ResourceNotExistsError, TombstoneError, PathSegmentError)
-from lakesuperior.store.ldp_rs.lmdb_triplestore import SimpleGraph, Imr
+from lakesuperior.model.rdf.graph import Graph
 
 
 META_GR_URI = nsc['fcsystem']['meta']
@@ -217,13 +217,15 @@ class RsrcCentricLayout:
         fname = path.join(
                 basedir, 'data', 'bootstrap', 'rsrc_centric_layout.sparql')
         with store.txn_ctx(True):
+            #import pdb; pdb.set_trace()
             with open(fname, 'r') as f:
                 data = Template(f.read())
                 self.ds.update(data.substitute(timestamp=arrow.utcnow()))
+        with store.txn_ctx():
             imr = self.get_imr('/', incl_inbound=False, incl_children=True)
 
-        gr = Graph(identifier=imr.uri)
-        gr += imr.data
+        #gr = Graph(identifier=imr.uri)
+        #gr += imr.data
         #checksum = to_isomorphic(gr).graph_digest()
         #digest = sha256(str(checksum).encode('ascii')).digest()
 
@@ -249,10 +251,9 @@ class RsrcCentricLayout:
         :param rdflib.term.URIRef ctx: URI of the optional context. If None,
             all named graphs are queried.
 
-        :rtype: SimpleGraph
+        :rtype: Graph
         """
-        return SimpleGraph(
-                store=self.store, lookup=((subject, None, None), ctx))
+        return self.store.triple_keys((subject, None, None), ctx)
 
 
     def count_rsrc(self):
@@ -291,15 +292,18 @@ class RsrcCentricLayout:
         if not incl_children:
             contexts.remove(nsc['fcstruct'][uid])
 
-        imr = Imr(uri=nsc['fcres'][uid])
+        imr = Graph(self.store, uri=nsc['fcres'][uid])
 
         for ctx in contexts:
-            imr |= SimpleGraph(
-                    lookup=((None, None, None), ctx), store=self.store).data
+            gr = self.store.triple_keys((None, None, None), ctx)
+            imr |= gr
 
         # Include inbound relationships.
         if incl_inbound and len(imr):
-            imr |= set(self.get_inbound_rel(nsc['fcres'][uid]))
+            gr = Graph(
+                self.store, data={*self.get_inbound_rel(nsc['fcres'][uid])}
+            )
+            imr |= gr
 
         if strict:
             self._check_rsrc_status(imr)
@@ -331,10 +335,11 @@ class RsrcCentricLayout:
         logger.debug('Getting metadata for: {}'.format(uid))
         if ver_uid:
             uid = self.snapshot_uid(uid, ver_uid)
-        imr = Imr(
-                uri=nsc['fcres'][uid],
-                lookup=((None, None, None), nsc['fcadmin'][uid]),
-                store=self.store)
+        imr = self.store.triple_keys(
+            (None, None, None),
+            context=nsc['fcadmin'][uid],
+            uri=nsc['fcres'][uid]
+        )
 
         if strict:
             self._check_rsrc_status(imr)
@@ -353,9 +358,11 @@ class RsrcCentricLayout:
         # graph. If multiple user-provided graphs will be supported, this
         # should use another query to get all of them.
         uri = nsc['fcres'][uid]
-        userdata = Imr(
-                uri=uri, lookup=((uri, None, None),nsc['fcmain'][uid]),
-                store=self.store)
+        userdata = self.store.triple_keys(
+            (None, None, None),
+            context=nsc['fcmain'][uid],
+            uri=uri
+        )
 
         return userdata
 
@@ -365,36 +372,34 @@ class RsrcCentricLayout:
         Get all metadata about a resource's versions.
 
         :param string uid: Resource UID.
-        :rtype: SimpleGraph
+        :rtype: Graph
         """
         # **Note:** This pretty much bends the ontology—it replaces the graph
         # URI with the subject URI. But the concepts of data and metadata in
         # Fedora are quite fluid anyways...
 
-        # Result graph.
-        imr = SimpleGraph(lookup=(
-            (nsc['fcres'][uid], nsc['fcrepo'].hasVersion, None),
-                nsc['fcadmin'][uid]), store=self.store)
-
-        vmeta = Imr(uri=nsc['fcres'][uid])
+        vmeta = Graph(self.store, uri=nsc['fcres'][uid])
 
         #Get version graphs proper.
-        for vtrp in imr:
+        for vtrp in self.store.triple_keys(
+            (nsc['fcres'][uid], nsc['fcrepo'].hasVersion, None),
+            nsc['fcadmin'][uid]
+        ):
             # Add the hasVersion triple to the result graph.
-            vmeta.add(vtrp)
-            vmeta_gr = SimpleGraph(
-                lookup=((
-                    None, nsc['foaf'].primaryTopic, vtrp[2]), HIST_GR_URI),
-                store=self.store)
+            vmeta.add((vtrp,))
+            vmeta_gr = self.store.triple_keys(
+                (None, nsc['foaf'].primaryTopic, vtrp[2]), HIST_GR_URI
+            )
             # Get triples in the meta graph filtering out undesired triples.
             for vmtrp in vmeta_gr:
-                for trp in SimpleGraph(lookup=((
-                        vmtrp[0], None, None), HIST_GR_URI), store=self.store):
+                for trp in self.store.triple_keys(
+                    (vmtrp[0], None, None), HIST_GR_URI
+                ):
                     if (
                             (trp[1] != nsc['rdf'].type
                             or trp[2] not in self.ignore_vmeta_types)
                             and (trp[1] not in self.ignore_vmeta_preds)):
-                        vmeta.add((vtrp[2], trp[1], trp[2]))
+                        vmeta.add(((vtrp[2], trp[1], trp[2]),))
 
         return vmeta
 
@@ -414,6 +419,7 @@ class RsrcCentricLayout:
         :return: Inbound triples or subjects.
         """
         # Only return non-historic graphs.
+        # TODO self.store.triple_keys?
         meta_gr = self.ds.graph(META_GR_URI)
         ptopic_uri = nsc['foaf'].primaryTopic
 
@@ -439,8 +445,9 @@ class RsrcCentricLayout:
         ctx_uri = nsc['fcstruct'][uid]
         cont_p = nsc['ldp'].contains
         def _recurse(dset, s, c):
-            new_dset = SimpleGraph(
-                    lookup=((s, cont_p, None), c), store=self.store)[s : cont_p]
+            new_dset = self.store.triple_keys(
+                (s, cont_p, None), c
+            )[s : cont_p]
             #new_dset = set(ds.graph(c)[s : cont_p])
             for ss in new_dset:
                 dset.add(ss)
@@ -459,9 +466,9 @@ class RsrcCentricLayout:
             return _recurse(set(), subj_uri, ctx_uri)
         else:
             #return ds.graph(ctx_uri)[subj_uri : cont_p : ])
-            return SimpleGraph(
-                    lookup=((subj_uri, cont_p, None), ctx_uri),
-                    store=self.store)[subj_uri : cont_p]
+            return self.store.triple_keys(
+                (subj_uri, cont_p, None), ctx_uri
+            )[subj_uri : cont_p]
 
 
     def get_last_version_uid(self, uid):
@@ -670,6 +677,7 @@ class RsrcCentricLayout:
         """
         Check if a resource is not existing or if it is a tombstone.
         """
+        #import pdb; pdb.set_trace()
         uid = self.uri_to_uid(imr.uri)
         if not len(imr):
             raise ResourceNotExistsError(uid)

lakesuperior/store/ldp_rs/term.c

@@ -1,5165 +0,0 @@
-/* Generated by Cython 0.28.4 */
-
-/* BEGIN: Cython Metadata
-{
-    "distutils": {
-        "depends": [],
-        "extra_compile_args": [
-            "-fopenmp"
-        ],
-        "extra_link_args": [
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-        ],
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-            "/home/scossu/code/lsup/src/ext/include"
-        ],
-        "libraries": [
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-        ],
-        "name": "lakesuperior.store.ldp_rs.term",
-        "sources": [
-            "/home/scossu/code/lsup/src/lakesuperior/store/ldp_rs/term.pyx",
-            "/home/scossu/code/lsup/src/ext/lib/tpl.c",
-            "/home/scossu/code/lsup/src/ext/lib/mdb.c",
-            "/home/scossu/code/lsup/src/ext/lib/midl.c"
-        ]
-    },
-    "module_name": "lakesuperior.store.ldp_rs.term"
-}
-END: Cython Metadata */
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-#if CYTHON_USE_PYLONG_INTERNALS
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-# if CYTHON_COMPILING_IN_CPYTHON
-#  define CYTHON_NCP_UNUSED
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-#define __Pyx_void_to_None(void_result) ((void)(void_result), Py_INCREF(Py_None), Py_None)
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-      #define CYTHON_FALLTHROUGH [[clang::fallthrough]]
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-    #if __apple_build_version__ < 7000000
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-#ifndef CYTHON_INLINE
-  #if defined(__clang__)
-    #define CYTHON_INLINE __inline__ __attribute__ ((__unused__))
-  #elif defined(__GNUC__)
-    #define CYTHON_INLINE __inline__
-  #elif defined(_MSC_VER)
-    #define CYTHON_INLINE __inline
-  #elif defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
-    #define CYTHON_INLINE inline
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-    #define CYTHON_INLINE
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-#if CYTHON_COMPILING_IN_PYPY && PY_VERSION_HEX < 0x02070600 && !defined(Py_OptimizeFlag)
-  #define Py_OptimizeFlag 0
-#endif
-#define __PYX_BUILD_PY_SSIZE_T "n"
-#define CYTHON_FORMAT_SSIZE_T "z"
-#if PY_MAJOR_VERSION < 3
-  #define __Pyx_BUILTIN_MODULE_NAME "__builtin__"
-  #define __Pyx_PyCode_New(a, k, l, s, f, code, c, n, v, fv, cell, fn, name, fline, lnos)\
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-  #define __Pyx_DefaultClassType PyClass_Type
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-#if CYTHON_COMPILING_IN_PYSTON
-  #define __Pyx_PyCode_HasFreeVars(co)  PyCode_HasFreeVars(co)
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-  #define __Pyx_PyThreadState_Current PyThreadState_GET()
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-  #define __Pyx_PyThreadState_Current _PyThreadState_UncheckedGet()
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-static CYTHON_INLINE int PyThread_tss_is_created(Py_tss_t *key) {
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-static CYTHON_INLINE void PyThread_tss_delete(Py_tss_t *key) {
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-#define __Pyx_PyDict_GetItemStr(dict, name)  _PyDict_GetItem_KnownHash(dict, name, ((PyASCIIObject *) name)->hash)
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-  #define __Pyx_PyUnicode_GET_LENGTH(u)   PyUnicode_GET_LENGTH(u)
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-  #define __Pyx_PyUnicode_GET_LENGTH(u)   PyUnicode_GET_SIZE(u)
-  #define __Pyx_PyUnicode_READ_CHAR(u, i) ((Py_UCS4)(PyUnicode_AS_UNICODE(u)[i]))
-  #define __Pyx_PyUnicode_MAX_CHAR_VALUE(u)   ((sizeof(Py_UNICODE) == 2) ? 65535 : 1114111)
-  #define __Pyx_PyUnicode_KIND(u)         (sizeof(Py_UNICODE))
-  #define __Pyx_PyUnicode_DATA(u)         ((void*)PyUnicode_AS_UNICODE(u))
-  #define __Pyx_PyUnicode_READ(k, d, i)   ((void)(k), (Py_UCS4)(((Py_UNICODE*)d)[i]))
-  #define __Pyx_PyUnicode_WRITE(k, d, i, ch)  (((void)(k)), ((Py_UNICODE*)d)[i] = ch)
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-  #define __Pyx_PyUnicode_Concat(a, b)      PyNumber_Add(a, b)
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-  #define __Pyx_PyUnicode_Concat(a, b)      PyUnicode_Concat(a, b)
-  #define __Pyx_PyUnicode_ConcatSafe(a, b)  ((unlikely((a) == Py_None) || unlikely((b) == Py_None)) ?\
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-#if CYTHON_COMPILING_IN_PYPY && !defined(PyUnicode_Contains)
-  #define PyUnicode_Contains(u, s)  PySequence_Contains(u, s)
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-#if CYTHON_COMPILING_IN_PYPY && !defined(PyByteArray_Check)
-  #define PyByteArray_Check(obj)  PyObject_TypeCheck(obj, &PyByteArray_Type)
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-#if CYTHON_COMPILING_IN_PYPY && !defined(PyObject_Format)
-  #define PyObject_Format(obj, fmt)  PyObject_CallMethod(obj, "__format__", "O", fmt)
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-#define __Pyx_PyString_FormatSafe(a, b)   ((unlikely((a) == Py_None)) ? PyNumber_Remainder(a, b) : __Pyx_PyString_Format(a, b))
-#define __Pyx_PyUnicode_FormatSafe(a, b)  ((unlikely((a) == Py_None)) ? PyNumber_Remainder(a, b) : PyUnicode_Format(a, b))
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-  #define __Pyx_PyString_Format(a, b)  PyUnicode_Format(a, b)
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-#if PY_MAJOR_VERSION < 3 && !defined(PyObject_ASCII)
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-  #define PyBaseString_Type            PyUnicode_Type
-  #define PyStringObject               PyUnicodeObject
-  #define PyString_Type                PyUnicode_Type
-  #define PyString_Check               PyUnicode_Check
-  #define PyString_CheckExact          PyUnicode_CheckExact
-  #define PyObject_Unicode             PyObject_Str
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-#define __Pyx_ErrRestoreWithState(type, value, tb)  PyErr_Restore(type, value, tb)
-#define __Pyx_ErrFetchWithState(type, value, tb)  PyErr_Fetch(type, value, tb)
-#define __Pyx_ErrRestoreInState(tstate, type, value, tb)  PyErr_Restore(type, value, tb)
-#define __Pyx_ErrFetchInState(tstate, type, value, tb)  PyErr_Fetch(type, value, tb)
-#define __Pyx_ErrRestore(type, value, tb)  PyErr_Restore(type, value, tb)
-#define __Pyx_ErrFetch(type, value, tb)  PyErr_Fetch(type, value, tb)
-#endif
-
-/* Profile.proto */
-#ifndef CYTHON_PROFILE
-#if CYTHON_COMPILING_IN_PYPY || CYTHON_COMPILING_IN_PYSTON
-  #define CYTHON_PROFILE 0
-#else
-  #define CYTHON_PROFILE 1
-#endif
-#endif
-#ifndef CYTHON_TRACE_NOGIL
-  #define CYTHON_TRACE_NOGIL 0
-#else
-  #if CYTHON_TRACE_NOGIL && !defined(CYTHON_TRACE)
-    #define CYTHON_TRACE 1
-  #endif
-#endif
-#ifndef CYTHON_TRACE
-  #define CYTHON_TRACE 0
-#endif
-#if CYTHON_TRACE
-  #undef CYTHON_PROFILE_REUSE_FRAME
-#endif
-#ifndef CYTHON_PROFILE_REUSE_FRAME
-  #define CYTHON_PROFILE_REUSE_FRAME 0
-#endif
-#if CYTHON_PROFILE || CYTHON_TRACE
-  #include "compile.h"
-  #include "frameobject.h"
-  #include "traceback.h"
-  #if CYTHON_PROFILE_REUSE_FRAME
-    #define CYTHON_FRAME_MODIFIER static
-    #define CYTHON_FRAME_DEL(frame)
-  #else
-    #define CYTHON_FRAME_MODIFIER
-    #define CYTHON_FRAME_DEL(frame) Py_CLEAR(frame)
-  #endif
-  #define __Pyx_TraceDeclarations\
-  static PyCodeObject *__pyx_frame_code = NULL;\
-  CYTHON_FRAME_MODIFIER PyFrameObject *__pyx_frame = NULL;\
-  int __Pyx_use_tracing = 0;
-  #define __Pyx_TraceFrameInit(codeobj)\
-  if (codeobj) __pyx_frame_code = (PyCodeObject*) codeobj;
-  #ifdef WITH_THREAD
-  #define __Pyx_TraceCall(funcname, srcfile, firstlineno, nogil, goto_error)\
-  if (nogil) {\
-      if (CYTHON_TRACE_NOGIL) {\
-          PyThreadState *tstate;\
-          PyGILState_STATE state = PyGILState_Ensure();\
-          tstate = __Pyx_PyThreadState_Current;\
-          if (unlikely(tstate->use_tracing) && !tstate->tracing &&\
-                  (tstate->c_profilefunc || (CYTHON_TRACE && tstate->c_tracefunc))) {\
-              __Pyx_use_tracing = __Pyx_TraceSetupAndCall(&__pyx_frame_code, &__pyx_frame, tstate, funcname, srcfile, firstlineno);\
-          }\
-          PyGILState_Release(state);\
-          if (unlikely(__Pyx_use_tracing < 0)) goto_error;\
-      }\
-  } else {\
-      PyThreadState* tstate = PyThreadState_GET();\
-      if (unlikely(tstate->use_tracing) && !tstate->tracing &&\
-              (tstate->c_profilefunc || (CYTHON_TRACE && tstate->c_tracefunc))) {\
-          __Pyx_use_tracing = __Pyx_TraceSetupAndCall(&__pyx_frame_code, &__pyx_frame, tstate, funcname, srcfile, firstlineno);\
-          if (unlikely(__Pyx_use_tracing < 0)) goto_error;\
-      }\
-  }
-  #else
-  #define __Pyx_TraceCall(funcname, srcfile, firstlineno, nogil, goto_error)\
-  {   PyThreadState* tstate = PyThreadState_GET();\
-      if (unlikely(tstate->use_tracing) && !tstate->tracing &&\
-              (tstate->c_profilefunc || (CYTHON_TRACE && tstate->c_tracefunc))) {\
-          __Pyx_use_tracing = __Pyx_TraceSetupAndCall(&__pyx_frame_code, &__pyx_frame, tstate, funcname, srcfile, firstlineno);\
-          if (unlikely(__Pyx_use_tracing < 0)) goto_error;\
-      }\
-  }
-  #endif
-  #define __Pyx_TraceException()\
-  if (likely(!__Pyx_use_tracing)); else {\
-      PyThreadState* tstate = __Pyx_PyThreadState_Current;\
-      if (tstate->use_tracing &&\
-              (tstate->c_profilefunc || (CYTHON_TRACE && tstate->c_tracefunc))) {\
-          tstate->tracing++;\
-          tstate->use_tracing = 0;\
-          PyObject *exc_info = __Pyx_GetExceptionTuple(tstate);\
-          if (exc_info) {\
-              if (CYTHON_TRACE && tstate->c_tracefunc)\
-                  tstate->c_tracefunc(\
-                      tstate->c_traceobj, __pyx_frame, PyTrace_EXCEPTION, exc_info);\
-              tstate->c_profilefunc(\
-                  tstate->c_profileobj, __pyx_frame, PyTrace_EXCEPTION, exc_info);\
-              Py_DECREF(exc_info);\
-          }\
-          tstate->use_tracing = 1;\
-          tstate->tracing--;\
-      }\
-  }
-  static void __Pyx_call_return_trace_func(PyThreadState *tstate, PyFrameObject *frame, PyObject *result) {
-      PyObject *type, *value, *traceback;
-      __Pyx_ErrFetchInState(tstate, &type, &value, &traceback);
-      tstate->tracing++;
-      tstate->use_tracing = 0;
-      if (CYTHON_TRACE && tstate->c_tracefunc)
-          tstate->c_tracefunc(tstate->c_traceobj, frame, PyTrace_RETURN, result);
-      if (tstate->c_profilefunc)
-          tstate->c_profilefunc(tstate->c_profileobj, frame, PyTrace_RETURN, result);
-      CYTHON_FRAME_DEL(frame);
-      tstate->use_tracing = 1;
-      tstate->tracing--;
-      __Pyx_ErrRestoreInState(tstate, type, value, traceback);
-  }
-  #ifdef WITH_THREAD
-  #define __Pyx_TraceReturn(result, nogil)\
-  if (likely(!__Pyx_use_tracing)); else {\
-      if (nogil) {\
-          if (CYTHON_TRACE_NOGIL) {\
-              PyThreadState *tstate;\
-              PyGILState_STATE state = PyGILState_Ensure();\
-              tstate = __Pyx_PyThreadState_Current;\
-              if (tstate->use_tracing) {\
-                  __Pyx_call_return_trace_func(tstate, __pyx_frame, (PyObject*)result);\
-              }\
-              PyGILState_Release(state);\
-          }\
-      } else {\
-          PyThreadState* tstate = __Pyx_PyThreadState_Current;\
-          if (tstate->use_tracing) {\
-              __Pyx_call_return_trace_func(tstate, __pyx_frame, (PyObject*)result);\
-          }\
-      }\
-  }
-  #else
-  #define __Pyx_TraceReturn(result, nogil)\
-  if (likely(!__Pyx_use_tracing)); else {\
-      PyThreadState* tstate = __Pyx_PyThreadState_Current;\
-      if (tstate->use_tracing) {\
-          __Pyx_call_return_trace_func(tstate, __pyx_frame, (PyObject*)result);\
-      }\
-  }
-  #endif
-  static PyCodeObject *__Pyx_createFrameCodeObject(const char *funcname, const char *srcfile, int firstlineno);
-  static int __Pyx_TraceSetupAndCall(PyCodeObject** code, PyFrameObject** frame, PyThreadState* tstate, const char *funcname, const char *srcfile, int firstlineno);
-#else
-  #define __Pyx_TraceDeclarations
-  #define __Pyx_TraceFrameInit(codeobj)
-  #define __Pyx_TraceCall(funcname, srcfile, firstlineno, nogil, goto_error)   if ((1)); else goto_error;
-  #define __Pyx_TraceException()
-  #define __Pyx_TraceReturn(result, nogil)
-#endif
-#if CYTHON_TRACE
-  static int __Pyx_call_line_trace_func(PyThreadState *tstate, PyFrameObject *frame, int lineno) {
-      int ret;
-      PyObject *type, *value, *traceback;
-      __Pyx_ErrFetchInState(tstate, &type, &value, &traceback);
-      __Pyx_PyFrame_SetLineNumber(frame, lineno);
-      tstate->tracing++;
-      tstate->use_tracing = 0;
-      ret = tstate->c_tracefunc(tstate->c_traceobj, frame, PyTrace_LINE, NULL);
-      tstate->use_tracing = 1;
-      tstate->tracing--;
-      if (likely(!ret)) {
-          __Pyx_ErrRestoreInState(tstate, type, value, traceback);
-      } else {
-          Py_XDECREF(type);
-          Py_XDECREF(value);
-          Py_XDECREF(traceback);
-      }
-      return ret;
-  }
-  #ifdef WITH_THREAD
-  #define __Pyx_TraceLine(lineno, nogil, goto_error)\
-  if (likely(!__Pyx_use_tracing)); else {\
-      if (nogil) {\
-          if (CYTHON_TRACE_NOGIL) {\
-              int ret = 0;\
-              PyThreadState *tstate;\
-              PyGILState_STATE state = PyGILState_Ensure();\
-              tstate = __Pyx_PyThreadState_Current;\
-              if (unlikely(tstate->use_tracing && tstate->c_tracefunc && __pyx_frame->f_trace)) {\
-                  ret = __Pyx_call_line_trace_func(tstate, __pyx_frame, lineno);\
-              }\
-              PyGILState_Release(state);\
-              if (unlikely(ret)) goto_error;\
-          }\
-      } else {\
-          PyThreadState* tstate = __Pyx_PyThreadState_Current;\
-          if (unlikely(tstate->use_tracing && tstate->c_tracefunc && __pyx_frame->f_trace)) {\
-              int ret = __Pyx_call_line_trace_func(tstate, __pyx_frame, lineno);\
-              if (unlikely(ret)) goto_error;\
-          }\
-      }\
-  }
-  #else
-  #define __Pyx_TraceLine(lineno, nogil, goto_error)\
-  if (likely(!__Pyx_use_tracing)); else {\
-      PyThreadState* tstate = __Pyx_PyThreadState_Current;\
-      if (unlikely(tstate->use_tracing && tstate->c_tracefunc && __pyx_frame->f_trace)) {\
-          int ret = __Pyx_call_line_trace_func(tstate, __pyx_frame, lineno);\
-          if (unlikely(ret)) goto_error;\
-      }\
-  }
-  #endif
-#else
-  #define __Pyx_TraceLine(lineno, nogil, goto_error)   if ((1)); else goto_error;
-#endif
-
-/* PyCFunctionFastCall.proto */
-#if CYTHON_FAST_PYCCALL
-static CYTHON_INLINE PyObject *__Pyx_PyCFunction_FastCall(PyObject *func, PyObject **args, Py_ssize_t nargs);
-#else
-#define __Pyx_PyCFunction_FastCall(func, args, nargs)  (assert(0), NULL)
-#endif
-
-/* PyFunctionFastCall.proto */
-#if CYTHON_FAST_PYCALL
-#define __Pyx_PyFunction_FastCall(func, args, nargs)\
-    __Pyx_PyFunction_FastCallDict((func), (args), (nargs), NULL)
-#if 1 || PY_VERSION_HEX < 0x030600B1
-static PyObject *__Pyx_PyFunction_FastCallDict(PyObject *func, PyObject **args, int nargs, PyObject *kwargs);
-#else
-#define __Pyx_PyFunction_FastCallDict(func, args, nargs, kwargs) _PyFunction_FastCallDict(func, args, nargs, kwargs)
-#endif
-#endif
-
-/* PyObjectCall.proto */
-#if CYTHON_COMPILING_IN_CPYTHON
-static CYTHON_INLINE PyObject* __Pyx_PyObject_Call(PyObject *func, PyObject *arg, PyObject *kw);
-#else
-#define __Pyx_PyObject_Call(func, arg, kw) PyObject_Call(func, arg, kw)
-#endif
-
-/* PyObjectCallMethO.proto */
-#if CYTHON_COMPILING_IN_CPYTHON
-static CYTHON_INLINE PyObject* __Pyx_PyObject_CallMethO(PyObject *func, PyObject *arg);
-#endif
-
-/* PyObjectCallOneArg.proto */
-static CYTHON_INLINE PyObject* __Pyx_PyObject_CallOneArg(PyObject *func, PyObject *arg);
-
-/* PyObjectCallNoArg.proto */
-#if CYTHON_COMPILING_IN_CPYTHON
-static CYTHON_INLINE PyObject* __Pyx_PyObject_CallNoArg(PyObject *func);
-#else
-#define __Pyx_PyObject_CallNoArg(func) __Pyx_PyObject_Call(func, __pyx_empty_tuple, NULL)
-#endif
-
-/* GetModuleGlobalName.proto */
-static CYTHON_INLINE PyObject *__Pyx_GetModuleGlobalName(PyObject *name);
-
-/* GetAttr.proto */
-static CYTHON_INLINE PyObject *__Pyx_GetAttr(PyObject *, PyObject *);
-
-/* PyObjectFormatSimple.proto */
-#if CYTHON_COMPILING_IN_PYPY
-    #define __Pyx_PyObject_FormatSimple(s, f) (\
-        likely(PyUnicode_CheckExact(s)) ? (Py_INCREF(s), s) :\
-        PyObject_Format(s, f))
-#elif PY_MAJOR_VERSION < 3
-    #define __Pyx_PyObject_FormatSimple(s, f) (\
-        likely(PyUnicode_CheckExact(s)) ? (Py_INCREF(s), s) :\
-        likely(PyString_CheckExact(s)) ? PyUnicode_FromEncodedObject(s, NULL, "strict") :\
-        PyObject_Format(s, f))
-#elif CYTHON_USE_TYPE_SLOTS
-    #define __Pyx_PyObject_FormatSimple(s, f) (\
-        likely(PyUnicode_CheckExact(s)) ? (Py_INCREF(s), s) :\
-        likely(PyLong_CheckExact(s)) ? PyLong_Type.tp_str(s) :\
-        likely(PyFloat_CheckExact(s)) ? PyFloat_Type.tp_str(s) :\
-        PyObject_Format(s, f))
-#else
-    #define __Pyx_PyObject_FormatSimple(s, f) (\
-        likely(PyUnicode_CheckExact(s)) ? (Py_INCREF(s), s) :\
-        PyObject_Format(s, f))
-#endif
-
-/* RaiseException.proto */
-static void __Pyx_Raise(PyObject *type, PyObject *value, PyObject *tb, PyObject *cause);
-
-/* IncludeStringH.proto */
-#include <string.h>
-
-/* BytesEquals.proto */
-static CYTHON_INLINE int __Pyx_PyBytes_Equals(PyObject* s1, PyObject* s2, int equals);
-
-/* decode_c_string_utf16.proto */
-static CYTHON_INLINE PyObject *__Pyx_PyUnicode_DecodeUTF16(const char *s, Py_ssize_t size, const char *errors) {
-    int byteorder = 0;
-    return PyUnicode_DecodeUTF16(s, size, errors, &byteorder);
-}
-static CYTHON_INLINE PyObject *__Pyx_PyUnicode_DecodeUTF16LE(const char *s, Py_ssize_t size, const char *errors) {
-    int byteorder = -1;
-    return PyUnicode_DecodeUTF16(s, size, errors, &byteorder);
-}
-static CYTHON_INLINE PyObject *__Pyx_PyUnicode_DecodeUTF16BE(const char *s, Py_ssize_t size, const char *errors) {
-    int byteorder = 1;
-    return PyUnicode_DecodeUTF16(s, size, errors, &byteorder);
-}
-
-/* decode_c_string.proto */
-static CYTHON_INLINE PyObject* __Pyx_decode_c_string(
-         const char* cstring, Py_ssize_t start, Py_ssize_t stop,
-         const char* encoding, const char* errors,
-         PyObject* (*decode_func)(const char *s, Py_ssize_t size, const char *errors));
-
-/* BuildPyUnicode.proto */
-static PyObject* __Pyx_PyUnicode_BuildFromAscii(Py_ssize_t ulength, char* chars, int clength,
-                                                int prepend_sign, char padding_char);
-
-/* CIntToPyUnicode.proto */
-static CYTHON_INLINE PyObject* __Pyx_PyUnicode_From_char(char value, Py_ssize_t width, char padding_char, char format_char);
-
-/* GetException.proto */
-#if CYTHON_FAST_THREAD_STATE
-#define __Pyx_GetException(type, value, tb)  __Pyx__GetException(__pyx_tstate, type, value, tb)
-static int __Pyx__GetException(PyThreadState *tstate, PyObject **type, PyObject **value, PyObject **tb);
-#else
-static int __Pyx_GetException(PyObject **type, PyObject **value, PyObject **tb);
-#endif
-
-/* SwapException.proto */
-#if CYTHON_FAST_THREAD_STATE
-#define __Pyx_ExceptionSwap(type, value, tb)  __Pyx__ExceptionSwap(__pyx_tstate, type, value, tb)
-static CYTHON_INLINE void __Pyx__ExceptionSwap(PyThreadState *tstate, PyObject **type, PyObject **value, PyObject **tb);
-#else
-static CYTHON_INLINE void __Pyx_ExceptionSwap(PyObject **type, PyObject **value, PyObject **tb);
-#endif
-
-/* SaveResetException.proto */
-#if CYTHON_FAST_THREAD_STATE
-#define __Pyx_ExceptionSave(type, value, tb)  __Pyx__ExceptionSave(__pyx_tstate, type, value, tb)
-static CYTHON_INLINE void __Pyx__ExceptionSave(PyThreadState *tstate, PyObject **type, PyObject **value, PyObject **tb);
-#define __Pyx_ExceptionReset(type, value, tb)  __Pyx__ExceptionReset(__pyx_tstate, type, value, tb)
-static CYTHON_INLINE void __Pyx__ExceptionReset(PyThreadState *tstate, PyObject *type, PyObject *value, PyObject *tb);
-#else
-#define __Pyx_ExceptionSave(type, value, tb)   PyErr_GetExcInfo(type, value, tb)
-#define __Pyx_ExceptionReset(type, value, tb)  PyErr_SetExcInfo(type, value, tb)
-#endif
-
-/* Import.proto */
-static PyObject *__Pyx_Import(PyObject *name, PyObject *from_list, int level);
-
-/* ImportFrom.proto */
-static PyObject* __Pyx_ImportFrom(PyObject* module, PyObject* name);
-
-/* CLineInTraceback.proto */
-#ifdef CYTHON_CLINE_IN_TRACEBACK
-#define __Pyx_CLineForTraceback(tstate, c_line)  (((CYTHON_CLINE_IN_TRACEBACK)) ? c_line : 0)
-#else
-static int __Pyx_CLineForTraceback(PyThreadState *tstate, int c_line);
-#endif
-
-/* CodeObjectCache.proto */
-typedef struct {
-    PyCodeObject* code_object;
-    int code_line;
-} __Pyx_CodeObjectCacheEntry;
-struct __Pyx_CodeObjectCache {
-    int count;
-    int max_count;
-    __Pyx_CodeObjectCacheEntry* entries;
-};
-static struct __Pyx_CodeObjectCache __pyx_code_cache = {0,0,NULL};
-static int __pyx_bisect_code_objects(__Pyx_CodeObjectCacheEntry* entries, int count, int code_line);
-static PyCodeObject *__pyx_find_code_object(int code_line);
-static void __pyx_insert_code_object(int code_line, PyCodeObject* code_object);
-
-/* AddTraceback.proto */
-static void __Pyx_AddTraceback(const char *funcname, int c_line,
-                               int py_line, const char *filename);
-
-/* CIntToPy.proto */
-static CYTHON_INLINE PyObject* __Pyx_PyInt_From_long(long value);
-
-/* CIntFromPy.proto */
-static CYTHON_INLINE long __Pyx_PyInt_As_long(PyObject *);
-
-/* CIntFromPy.proto */
-static CYTHON_INLINE int __Pyx_PyInt_As_int(PyObject *);
-
-/* FastTypeChecks.proto */
-#if CYTHON_COMPILING_IN_CPYTHON
-#define __Pyx_TypeCheck(obj, type) __Pyx_IsSubtype(Py_TYPE(obj), (PyTypeObject *)type)
-static CYTHON_INLINE int __Pyx_IsSubtype(PyTypeObject *a, PyTypeObject *b);
-static CYTHON_INLINE int __Pyx_PyErr_GivenExceptionMatches(PyObject *err, PyObject *type);
-static CYTHON_INLINE int __Pyx_PyErr_GivenExceptionMatches2(PyObject *err, PyObject *type1, PyObject *type2);
-#else
-#define __Pyx_TypeCheck(obj, type) PyObject_TypeCheck(obj, (PyTypeObject *)type)
-#define __Pyx_PyErr_GivenExceptionMatches(err, type) PyErr_GivenExceptionMatches(err, type)
-#define __Pyx_PyErr_GivenExceptionMatches2(err, type1, type2) (PyErr_GivenExceptionMatches(err, type1) || PyErr_GivenExceptionMatches(err, type2))
-#endif
-#define __Pyx_PyException_Check(obj) __Pyx_TypeCheck(obj, PyExc_Exception)
-
-/* CheckBinaryVersion.proto */
-static int __Pyx_check_binary_version(void);
-
-/* PyObjectSetAttrStr.proto */
-#if CYTHON_USE_TYPE_SLOTS
-#define __Pyx_PyObject_DelAttrStr(o,n) __Pyx_PyObject_SetAttrStr(o, n, NULL)
-static CYTHON_INLINE int __Pyx_PyObject_SetAttrStr(PyObject* obj, PyObject* attr_name, PyObject* value);
-#else
-#define __Pyx_PyObject_DelAttrStr(o,n)   PyObject_DelAttr(o,n)
-#define __Pyx_PyObject_SetAttrStr(o,n,v) PyObject_SetAttr(o,n,v)
-#endif
-
-/* VoidPtrExport.proto */
-static int __Pyx_ExportVoidPtr(PyObject *name, void *p, const char *sig);
-
-/* FunctionExport.proto */
-static int __Pyx_ExportFunction(const char *name, void (*f)(void), const char *sig);
-
-/* PyIdentifierFromString.proto */
-#if !defined(__Pyx_PyIdentifier_FromString)
-#if PY_MAJOR_VERSION < 3
-  #define __Pyx_PyIdentifier_FromString(s) PyString_FromString(s)
-#else
-  #define __Pyx_PyIdentifier_FromString(s) PyUnicode_FromString(s)
-#endif
-#endif
-
-/* ModuleImport.proto */
-static PyObject *__Pyx_ImportModule(const char *name);
-
-/* TypeImport.proto */
-static PyTypeObject *__Pyx_ImportType(const char *module_name, const char *class_name, size_t size, int strict);
-
-/* InitStrings.proto */
-static int __Pyx_InitStrings(__Pyx_StringTabEntry *t);
-
-
-/* Module declarations from 'libc.string' */
-
-/* Module declarations from 'libc.stdlib' */
-
-/* Module declarations from 'lakesuperior.cy_include' */
-
-/* Module declarations from 'libc.stdio' */
-
-/* Module declarations from '__builtin__' */
-
-/* Module declarations from 'cpython.type' */
-static PyTypeObject *__pyx_ptype_7cpython_4type_type = 0;
-
-/* Module declarations from 'cpython' */
-
-/* Module declarations from 'cpython.object' */
-
-/* Module declarations from 'cpython.string' */
-
-/* Module declarations from 'libc.stdint' */
-
-/* Module declarations from 'lakesuperior.cy_include.cytpl' */
-
-/* Module declarations from 'lakesuperior.store.ldp_rs.term' */
-static unsigned char __pyx_v_12lakesuperior_5store_6ldp_rs_4term_term_type;
-static unsigned char *__pyx_v_12lakesuperior_5store_6ldp_rs_4term_pack_fmt;
-static unsigned char *__pyx_v_12lakesuperior_5store_6ldp_rs_4term_term_data;
-static unsigned char *__pyx_v_12lakesuperior_5store_6ldp_rs_4term_term_datatype;
-static unsigned char *__pyx_v_12lakesuperior_5store_6ldp_rs_4term_term_lang;
-#define __Pyx_MODULE_NAME "lakesuperior.store.ldp_rs.term"
-extern int __pyx_module_is_main_lakesuperior__store__ldp_rs__term;
-int __pyx_module_is_main_lakesuperior__store__ldp_rs__term = 0;
-
-/* Implementation of 'lakesuperior.store.ldp_rs.term' */
-static PyObject *__pyx_builtin_ValueError;
-static PyObject *__pyx_builtin_IOError;
-static const char __pyx_k_[] = "";
-static const char __pyx_k_S_cs[] = "S(cs)";
-static const char __pyx_k_lang[] = "lang";
-static const char __pyx_k_main[] = "__main__";
-static const char __pyx_k_test[] = "__test__";
-static const char __pyx_k_BNode[] = "BNode";
-static const char __pyx_k_S_csss[] = "S(csss)";
-static const char __pyx_k_URIRef[] = "URIRef";
-static const char __pyx_k_encode[] = "encode";
-static const char __pyx_k_import[] = "__import__";
-static const char __pyx_k_rdflib[] = "rdflib";
-static const char __pyx_k_IOError[] = "IOError";
-static const char __pyx_k_Literal[] = "Literal";
-static const char __pyx_k_datatype[] = "datatype";
-static const char __pyx_k_language[] = "language";
-static const char __pyx_k_pack_fmt[] = "pack_fmt";
-static const char __pyx_k_pyx_capi[] = "__pyx_capi__";
-static const char __pyx_k_term_data[] = "term_data";
-static const char __pyx_k_term_lang[] = "term_lang";
-static const char __pyx_k_term_type[] = "term_type";
-static const char __pyx_k_ValueError[] = "ValueError";
-static const char __pyx_k_term_datatype[] = "term_datatype";
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-#endif
-
-/* PyFunctionFastCall */
-#if CYTHON_FAST_PYCALL
-#include "frameobject.h"
-static PyObject* __Pyx_PyFunction_FastCallNoKw(PyCodeObject *co, PyObject **args, Py_ssize_t na,
-                                               PyObject *globals) {
-    PyFrameObject *f;
-    PyThreadState *tstate = __Pyx_PyThreadState_Current;
-    PyObject **fastlocals;
-    Py_ssize_t i;
-    PyObject *result;
-    assert(globals != NULL);
-    /* XXX Perhaps we should create a specialized
-       PyFrame_New() that doesn't take locals, but does
-       take builtins without sanity checking them.
-       */
-    assert(tstate != NULL);
-    f = PyFrame_New(tstate, co, globals, NULL);
-    if (f == NULL) {
-        return NULL;
-    }
-    fastlocals = f->f_localsplus;
-    for (i = 0; i < na; i++) {
-        Py_INCREF(*args);
-        fastlocals[i] = *args++;
-    }
-    result = PyEval_EvalFrameEx(f,0);
-    ++tstate->recursion_depth;
-    Py_DECREF(f);
-    --tstate->recursion_depth;
-    return result;
-}
-#if 1 || PY_VERSION_HEX < 0x030600B1
-static PyObject *__Pyx_PyFunction_FastCallDict(PyObject *func, PyObject **args, int nargs, PyObject *kwargs) {
-    PyCodeObject *co = (PyCodeObject *)PyFunction_GET_CODE(func);
-    PyObject *globals = PyFunction_GET_GLOBALS(func);
-    PyObject *argdefs = PyFunction_GET_DEFAULTS(func);
-    PyObject *closure;
-#if PY_MAJOR_VERSION >= 3
-    PyObject *kwdefs;
-#endif
-    PyObject *kwtuple, **k;
-    PyObject **d;
-    Py_ssize_t nd;
-    Py_ssize_t nk;
-    PyObject *result;
-    assert(kwargs == NULL || PyDict_Check(kwargs));
-    nk = kwargs ? PyDict_Size(kwargs) : 0;
-    if (Py_EnterRecursiveCall((char*)" while calling a Python object")) {
-        return NULL;
-    }
-    if (
-#if PY_MAJOR_VERSION >= 3
-            co->co_kwonlyargcount == 0 &&
-#endif
-            likely(kwargs == NULL || nk == 0) &&
-            co->co_flags == (CO_OPTIMIZED | CO_NEWLOCALS | CO_NOFREE)) {
-        if (argdefs == NULL && co->co_argcount == nargs) {
-            result = __Pyx_PyFunction_FastCallNoKw(co, args, nargs, globals);
-            goto done;
-        }
-        else if (nargs == 0 && argdefs != NULL
-                 && co->co_argcount == Py_SIZE(argdefs)) {
-            /* function called with no arguments, but all parameters have
-               a default value: use default values as arguments .*/
-            args = &PyTuple_GET_ITEM(argdefs, 0);
-            result =__Pyx_PyFunction_FastCallNoKw(co, args, Py_SIZE(argdefs), globals);
-            goto done;
-        }
-    }
-    if (kwargs != NULL) {
-        Py_ssize_t pos, i;
-        kwtuple = PyTuple_New(2 * nk);
-        if (kwtuple == NULL) {
-            result = NULL;
-            goto done;
-        }
-        k = &PyTuple_GET_ITEM(kwtuple, 0);
-        pos = i = 0;
-        while (PyDict_Next(kwargs, &pos, &k[i], &k[i+1])) {
-            Py_INCREF(k[i]);
-            Py_INCREF(k[i+1]);
-            i += 2;
-        }
-        nk = i / 2;
-    }
-    else {
-        kwtuple = NULL;
-        k = NULL;
-    }
-    closure = PyFunction_GET_CLOSURE(func);
-#if PY_MAJOR_VERSION >= 3
-    kwdefs = PyFunction_GET_KW_DEFAULTS(func);
-#endif
-    if (argdefs != NULL) {
-        d = &PyTuple_GET_ITEM(argdefs, 0);
-        nd = Py_SIZE(argdefs);
-    }
-    else {
-        d = NULL;
-        nd = 0;
-    }
-#if PY_MAJOR_VERSION >= 3
-    result = PyEval_EvalCodeEx((PyObject*)co, globals, (PyObject *)NULL,
-                               args, nargs,
-                               k, (int)nk,
-                               d, (int)nd, kwdefs, closure);
-#else
-    result = PyEval_EvalCodeEx(co, globals, (PyObject *)NULL,
-                               args, nargs,
-                               k, (int)nk,
-                               d, (int)nd, closure);
-#endif
-    Py_XDECREF(kwtuple);
-done:
-    Py_LeaveRecursiveCall();
-    return result;
-}
-#endif
-#endif
-
-/* PyObjectCall */
-#if CYTHON_COMPILING_IN_CPYTHON
-static CYTHON_INLINE PyObject* __Pyx_PyObject_Call(PyObject *func, PyObject *arg, PyObject *kw) {
-    PyObject *result;
-    ternaryfunc call = func->ob_type->tp_call;
-    if (unlikely(!call))
-        return PyObject_Call(func, arg, kw);
-    if (unlikely(Py_EnterRecursiveCall((char*)" while calling a Python object")))
-        return NULL;
-    result = (*call)(func, arg, kw);
-    Py_LeaveRecursiveCall();
-    if (unlikely(!result) && unlikely(!PyErr_Occurred())) {
-        PyErr_SetString(
-            PyExc_SystemError,
-            "NULL result without error in PyObject_Call");
-    }
-    return result;
-}
-#endif
-
-/* PyObjectCallMethO */
-#if CYTHON_COMPILING_IN_CPYTHON
-static CYTHON_INLINE PyObject* __Pyx_PyObject_CallMethO(PyObject *func, PyObject *arg) {
-    PyObject *self, *result;
-    PyCFunction cfunc;
-    cfunc = PyCFunction_GET_FUNCTION(func);
-    self = PyCFunction_GET_SELF(func);
-    if (unlikely(Py_EnterRecursiveCall((char*)" while calling a Python object")))
-        return NULL;
-    result = cfunc(self, arg);
-    Py_LeaveRecursiveCall();
-    if (unlikely(!result) && unlikely(!PyErr_Occurred())) {
-        PyErr_SetString(
-            PyExc_SystemError,
-            "NULL result without error in PyObject_Call");
-    }
-    return result;
-}
-#endif
-
-/* PyObjectCallOneArg */
-#if CYTHON_COMPILING_IN_CPYTHON
-static PyObject* __Pyx__PyObject_CallOneArg(PyObject *func, PyObject *arg) {
-    PyObject *result;
-    PyObject *args = PyTuple_New(1);
-    if (unlikely(!args)) return NULL;
-    Py_INCREF(arg);
-    PyTuple_SET_ITEM(args, 0, arg);
-    result = __Pyx_PyObject_Call(func, args, NULL);
-    Py_DECREF(args);
-    return result;
-}
-static CYTHON_INLINE PyObject* __Pyx_PyObject_CallOneArg(PyObject *func, PyObject *arg) {
-#if CYTHON_FAST_PYCALL
-    if (PyFunction_Check(func)) {
-        return __Pyx_PyFunction_FastCall(func, &arg, 1);
-    }
-#endif
-    if (likely(PyCFunction_Check(func))) {
-        if (likely(PyCFunction_GET_FLAGS(func) & METH_O)) {
-            return __Pyx_PyObject_CallMethO(func, arg);
-#if CYTHON_FAST_PYCCALL
-        } else if (PyCFunction_GET_FLAGS(func) & METH_FASTCALL) {
-            return __Pyx_PyCFunction_FastCall(func, &arg, 1);
-#endif
-        }
-    }
-    return __Pyx__PyObject_CallOneArg(func, arg);
-}
-#else
-static CYTHON_INLINE PyObject* __Pyx_PyObject_CallOneArg(PyObject *func, PyObject *arg) {
-    PyObject *result;
-    PyObject *args = PyTuple_Pack(1, arg);
-    if (unlikely(!args)) return NULL;
-    result = __Pyx_PyObject_Call(func, args, NULL);
-    Py_DECREF(args);
-    return result;
-}
-#endif
-
-/* PyObjectCallNoArg */
-#if CYTHON_COMPILING_IN_CPYTHON
-static CYTHON_INLINE PyObject* __Pyx_PyObject_CallNoArg(PyObject *func) {
-#if CYTHON_FAST_PYCALL
-    if (PyFunction_Check(func)) {
-        return __Pyx_PyFunction_FastCall(func, NULL, 0);
-    }
-#endif
-#ifdef __Pyx_CyFunction_USED
-    if (likely(PyCFunction_Check(func) || __Pyx_TypeCheck(func, __pyx_CyFunctionType))) {
-#else
-    if (likely(PyCFunction_Check(func))) {
-#endif
-        if (likely(PyCFunction_GET_FLAGS(func) & METH_NOARGS)) {
-            return __Pyx_PyObject_CallMethO(func, NULL);
-        }
-    }
-    return __Pyx_PyObject_Call(func, __pyx_empty_tuple, NULL);
-}
-#endif
-
-/* GetModuleGlobalName */
-  static CYTHON_INLINE PyObject *__Pyx_GetModuleGlobalName(PyObject *name) {
-    PyObject *result;
-#if !CYTHON_AVOID_BORROWED_REFS
-#if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x030500A1
-    result = _PyDict_GetItem_KnownHash(__pyx_d, name, ((PyASCIIObject *) name)->hash);
-    if (likely(result)) {
-        Py_INCREF(result);
-    } else if (unlikely(PyErr_Occurred())) {
-        result = NULL;
-    } else {
-#else
-    result = PyDict_GetItem(__pyx_d, name);
-    if (likely(result)) {
-        Py_INCREF(result);
-    } else {
-#endif
-#else
-    result = PyObject_GetItem(__pyx_d, name);
-    if (!result) {
-        PyErr_Clear();
-#endif
-        result = __Pyx_GetBuiltinName(name);
-    }
-    return result;
-}
-
-/* GetAttr */
-      static CYTHON_INLINE PyObject *__Pyx_GetAttr(PyObject *o, PyObject *n) {
-#if CYTHON_USE_TYPE_SLOTS
-#if PY_MAJOR_VERSION >= 3
-    if (likely(PyUnicode_Check(n)))
-#else
-    if (likely(PyString_Check(n)))
-#endif
-        return __Pyx_PyObject_GetAttrStr(o, n);
-#endif
-    return PyObject_GetAttr(o, n);
-}
-
-/* RaiseException */
-      #if PY_MAJOR_VERSION < 3
-static void __Pyx_Raise(PyObject *type, PyObject *value, PyObject *tb,
-                        CYTHON_UNUSED PyObject *cause) {
-    __Pyx_PyThreadState_declare
-    Py_XINCREF(type);
-    if (!value || value == Py_None)
-        value = NULL;
-    else
-        Py_INCREF(value);
-    if (!tb || tb == Py_None)
-        tb = NULL;
-    else {
-        Py_INCREF(tb);
-        if (!PyTraceBack_Check(tb)) {
-            PyErr_SetString(PyExc_TypeError,
-                "raise: arg 3 must be a traceback or None");
-            goto raise_error;
-        }
-    }
-    if (PyType_Check(type)) {
-#if CYTHON_COMPILING_IN_PYPY
-        if (!value) {
-            Py_INCREF(Py_None);
-            value = Py_None;
-        }
-#endif
-        PyErr_NormalizeException(&type, &value, &tb);
-    } else {
-        if (value) {
-            PyErr_SetString(PyExc_TypeError,
-                "instance exception may not have a separate value");
-            goto raise_error;
-        }
-        value = type;
-        type = (PyObject*) Py_TYPE(type);
-        Py_INCREF(type);
-        if (!PyType_IsSubtype((PyTypeObject *)type, (PyTypeObject *)PyExc_BaseException)) {
-            PyErr_SetString(PyExc_TypeError,
-                "raise: exception class must be a subclass of BaseException");
-            goto raise_error;
-        }
-    }
-    __Pyx_PyThreadState_assign
-    __Pyx_ErrRestore(type, value, tb);
-    return;
-raise_error:
-    Py_XDECREF(value);
-    Py_XDECREF(type);
-    Py_XDECREF(tb);
-    return;
-}
-#else
-static void __Pyx_Raise(PyObject *type, PyObject *value, PyObject *tb, PyObject *cause) {
-    PyObject* owned_instance = NULL;
-    if (tb == Py_None) {
-        tb = 0;
-    } else if (tb && !PyTraceBack_Check(tb)) {
-        PyErr_SetString(PyExc_TypeError,
-            "raise: arg 3 must be a traceback or None");
-        goto bad;
-    }
-    if (value == Py_None)
-        value = 0;
-    if (PyExceptionInstance_Check(type)) {
-        if (value) {
-            PyErr_SetString(PyExc_TypeError,
-                "instance exception may not have a separate value");
-            goto bad;
-        }
-        value = type;
-        type = (PyObject*) Py_TYPE(value);
-    } else if (PyExceptionClass_Check(type)) {
-        PyObject *instance_class = NULL;
-        if (value && PyExceptionInstance_Check(value)) {
-            instance_class = (PyObject*) Py_TYPE(value);
-            if (instance_class != type) {
-                int is_subclass = PyObject_IsSubclass(instance_class, type);
-                if (!is_subclass) {
-                    instance_class = NULL;
-                } else if (unlikely(is_subclass == -1)) {
-                    goto bad;
-                } else {
-                    type = instance_class;
-                }
-            }
-        }
-        if (!instance_class) {
-            PyObject *args;
-            if (!value)
-                args = PyTuple_New(0);
-            else if (PyTuple_Check(value)) {
-                Py_INCREF(value);
-                args = value;
-            } else
-                args = PyTuple_Pack(1, value);
-            if (!args)
-                goto bad;
-            owned_instance = PyObject_Call(type, args, NULL);
-            Py_DECREF(args);
-            if (!owned_instance)
-                goto bad;
-            value = owned_instance;
-            if (!PyExceptionInstance_Check(value)) {
-                PyErr_Format(PyExc_TypeError,
-                             "calling %R should have returned an instance of "
-                             "BaseException, not %R",
-                             type, Py_TYPE(value));
-                goto bad;
-            }
-        }
-    } else {
-        PyErr_SetString(PyExc_TypeError,
-            "raise: exception class must be a subclass of BaseException");
-        goto bad;
-    }
-    if (cause) {
-        PyObject *fixed_cause;
-        if (cause == Py_None) {
-            fixed_cause = NULL;
-        } else if (PyExceptionClass_Check(cause)) {
-            fixed_cause = PyObject_CallObject(cause, NULL);
-            if (fixed_cause == NULL)
-                goto bad;
-        } else if (PyExceptionInstance_Check(cause)) {
-            fixed_cause = cause;
-            Py_INCREF(fixed_cause);
-        } else {
-            PyErr_SetString(PyExc_TypeError,
-                            "exception causes must derive from "
-                            "BaseException");
-            goto bad;
-        }
-        PyException_SetCause(value, fixed_cause);
-    }
-    PyErr_SetObject(type, value);
-    if (tb) {
-#if CYTHON_COMPILING_IN_PYPY
-        PyObject *tmp_type, *tmp_value, *tmp_tb;
-        PyErr_Fetch(&tmp_type, &tmp_value, &tmp_tb);
-        Py_INCREF(tb);
-        PyErr_Restore(tmp_type, tmp_value, tb);
-        Py_XDECREF(tmp_tb);
-#else
-        PyThreadState *tstate = __Pyx_PyThreadState_Current;
-        PyObject* tmp_tb = tstate->curexc_traceback;
-        if (tb != tmp_tb) {
-            Py_INCREF(tb);
-            tstate->curexc_traceback = tb;
-            Py_XDECREF(tmp_tb);
-        }
-#endif
-    }
-bad:
-    Py_XDECREF(owned_instance);
-    return;
-}
-#endif
-
-/* BytesEquals */
-      static CYTHON_INLINE int __Pyx_PyBytes_Equals(PyObject* s1, PyObject* s2, int equals) {
-#if CYTHON_COMPILING_IN_PYPY
-    return PyObject_RichCompareBool(s1, s2, equals);
-#else
-    if (s1 == s2) {
-        return (equals == Py_EQ);
-    } else if (PyBytes_CheckExact(s1) & PyBytes_CheckExact(s2)) {
-        const char *ps1, *ps2;
-        Py_ssize_t length = PyBytes_GET_SIZE(s1);
-        if (length != PyBytes_GET_SIZE(s2))
-            return (equals == Py_NE);
-        ps1 = PyBytes_AS_STRING(s1);
-        ps2 = PyBytes_AS_STRING(s2);
-        if (ps1[0] != ps2[0]) {
-            return (equals == Py_NE);
-        } else if (length == 1) {
-            return (equals == Py_EQ);
-        } else {
-            int result;
-#if CYTHON_USE_UNICODE_INTERNALS
-            Py_hash_t hash1, hash2;
-            hash1 = ((PyBytesObject*)s1)->ob_shash;
-            hash2 = ((PyBytesObject*)s2)->ob_shash;
-            if (hash1 != hash2 && hash1 != -1 && hash2 != -1) {
-                return (equals == Py_NE);
-            }
-#endif
-            result = memcmp(ps1, ps2, (size_t)length);
-            return (equals == Py_EQ) ? (result == 0) : (result != 0);
-        }
-    } else if ((s1 == Py_None) & PyBytes_CheckExact(s2)) {
-        return (equals == Py_NE);
-    } else if ((s2 == Py_None) & PyBytes_CheckExact(s1)) {
-        return (equals == Py_NE);
-    } else {
-        int result;
-        PyObject* py_result = PyObject_RichCompare(s1, s2, equals);
-        if (!py_result)
-            return -1;
-        result = __Pyx_PyObject_IsTrue(py_result);
-        Py_DECREF(py_result);
-        return result;
-    }
-#endif
-}
-
-/* decode_c_string */
-      static CYTHON_INLINE PyObject* __Pyx_decode_c_string(
-         const char* cstring, Py_ssize_t start, Py_ssize_t stop,
-         const char* encoding, const char* errors,
-         PyObject* (*decode_func)(const char *s, Py_ssize_t size, const char *errors)) {
-    Py_ssize_t length;
-    if (unlikely((start < 0) | (stop < 0))) {
-        size_t slen = strlen(cstring);
-        if (unlikely(slen > (size_t) PY_SSIZE_T_MAX)) {
-            PyErr_SetString(PyExc_OverflowError,
-                            "c-string too long to convert to Python");
-            return NULL;
-        }
-        length = (Py_ssize_t) slen;
-        if (start < 0) {
-            start += length;
-            if (start < 0)
-                start = 0;
-        }
-        if (stop < 0)
-            stop += length;
-    }
-    length = stop - start;
-    if (unlikely(length <= 0))
-        return PyUnicode_FromUnicode(NULL, 0);
-    cstring += start;
-    if (decode_func) {
-        return decode_func(cstring, length, errors);
-    } else {
-        return PyUnicode_Decode(cstring, length, encoding, errors);
-    }
-}
-
-/* CIntToDigits */
-      static const char DIGIT_PAIRS_10[2*10*10+1] = {
-    "00010203040506070809"
-    "10111213141516171819"
-    "20212223242526272829"
-    "30313233343536373839"
-    "40414243444546474849"
-    "50515253545556575859"
-    "60616263646566676869"
-    "70717273747576777879"
-    "80818283848586878889"
-    "90919293949596979899"
-};
-static const char DIGIT_PAIRS_8[2*8*8+1] = {
-    "0001020304050607"
-    "1011121314151617"
-    "2021222324252627"
-    "3031323334353637"
-    "4041424344454647"
-    "5051525354555657"
-    "6061626364656667"
-    "7071727374757677"
-};
-static const char DIGITS_HEX[2*16+1] = {
-    "0123456789abcdef"
-    "0123456789ABCDEF"
-};
-
-/* BuildPyUnicode */
-      static PyObject* __Pyx_PyUnicode_BuildFromAscii(Py_ssize_t ulength, char* chars, int clength,
-                                                int prepend_sign, char padding_char) {
-    PyObject *uval;
-    Py_ssize_t uoffset = ulength - clength;
-#if CYTHON_USE_UNICODE_INTERNALS
-    Py_ssize_t i;
-#if CYTHON_PEP393_ENABLED
-    void *udata;
-    uval = PyUnicode_New(ulength, 127);
-    if (unlikely(!uval)) return NULL;
-    udata = PyUnicode_DATA(uval);
-#else
-    Py_UNICODE *udata;
-    uval = PyUnicode_FromUnicode(NULL, ulength);
-    if (unlikely(!uval)) return NULL;
-    udata = PyUnicode_AS_UNICODE(uval);
-#endif
-    if (uoffset > 0) {
-        i = 0;
-        if (prepend_sign) {
-            __Pyx_PyUnicode_WRITE(PyUnicode_1BYTE_KIND, udata, 0, '-');
-            i++;
-        }
-        for (; i < uoffset; i++) {
-            __Pyx_PyUnicode_WRITE(PyUnicode_1BYTE_KIND, udata, i, padding_char);
-        }
-    }
-    for (i=0; i < clength; i++) {
-        __Pyx_PyUnicode_WRITE(PyUnicode_1BYTE_KIND, udata, uoffset+i, chars[i]);
-    }
-#else
-    {
-        uval = NULL;
-        PyObject *sign = NULL, *padding = NULL;
-        if (uoffset > 0) {
-            prepend_sign = !!prepend_sign;
-            if (uoffset > prepend_sign) {
-                padding = PyUnicode_FromOrdinal(padding_char);
-                if (likely(padding) && uoffset > prepend_sign + 1) {
-                    PyObject *tmp;
-                    PyObject *repeat = PyInt_FromSize_t(uoffset - prepend_sign);
-                    if (unlikely(!repeat)) goto done_or_error;
-                    tmp = PyNumber_Multiply(padding, repeat);
-                    Py_DECREF(repeat);
-                    Py_DECREF(padding);
-                    padding = tmp;
-                }
-                if (unlikely(!padding)) goto done_or_error;
-            }
-            if (prepend_sign) {
-                sign = PyUnicode_FromOrdinal('-');
-                if (unlikely(!sign)) goto done_or_error;
-            }
-        }
-        uval = PyUnicode_DecodeASCII(chars, clength, NULL);
-        if (likely(uval) && padding) {
-            PyObject *tmp = PyNumber_Add(padding, uval);
-            Py_DECREF(uval);
-            uval = tmp;
-        }
-        if (likely(uval) && sign) {
-            PyObject *tmp = PyNumber_Add(sign, uval);
-            Py_DECREF(uval);
-            uval = tmp;
-        }
-done_or_error:
-        Py_XDECREF(padding);
-        Py_XDECREF(sign);
-    }
-#endif
-    return uval;
-}
-
-/* CIntToPyUnicode */
-      #ifdef _MSC_VER
-    #ifndef _MSC_STDINT_H_
-        #if _MSC_VER < 1300
-           typedef unsigned short    uint16_t;
-        #else
-           typedef unsigned __int16  uint16_t;
-        #endif
-    #endif
-#else
-   #include <stdint.h>
-#endif
-static CYTHON_INLINE PyObject* __Pyx_PyUnicode_From_char(char value, Py_ssize_t width, char padding_char, char format_char) {
-    char digits[sizeof(char)*3+2];
-    char *dpos, *end = digits + sizeof(char)*3+2;
-    const char *hex_digits = DIGITS_HEX;
-    Py_ssize_t length, ulength;
-    int prepend_sign, last_one_off;
-    char remaining;
-    const char neg_one = (char) -1, const_zero = (char) 0;
-    const int is_unsigned = neg_one > const_zero;
-    if (format_char == 'X') {
-        hex_digits += 16;
-        format_char = 'x';
-    }
-    remaining = value;
-    last_one_off = 0;
-    dpos = end;
-    do {
-        int digit_pos;
-        switch (format_char) {
-        case 'o':
-            digit_pos = abs((int)(remaining % (8*8)));
-            remaining = (char) (remaining / (8*8));
-            dpos -= 2;
-            *(uint16_t*)dpos = ((uint16_t*)DIGIT_PAIRS_8)[digit_pos];
-            last_one_off = (digit_pos < 8);
-            break;
-        case 'd':
-            digit_pos = abs((int)(remaining % (10*10)));
-            remaining = (char) (remaining / (10*10));
-            dpos -= 2;
-            *(uint16_t*)dpos = ((uint16_t*)DIGIT_PAIRS_10)[digit_pos];
-            last_one_off = (digit_pos < 10);
-            break;
-        case 'x':
-            *(--dpos) = hex_digits[abs((int)(remaining % 16))];
-            remaining = (char) (remaining / 16);
-            break;
-        default:
-            assert(0);
-            break;
-        }
-    } while (unlikely(remaining != 0));
-    if (last_one_off) {
-        assert(*dpos == '0');
-        dpos++;
-    }
-    length = end - dpos;
-    ulength = length;
-    prepend_sign = 0;
-    if (!is_unsigned && value <= neg_one) {
-        if (padding_char == ' ' || width <= length + 1) {
-            *(--dpos) = '-';
-            ++length;
-        } else {
-            prepend_sign = 1;
-        }
-        ++ulength;
-    }
-    if (width > ulength) {
-        ulength = width;
-    }
-    if (ulength == 1) {
-        return PyUnicode_FromOrdinal(*dpos);
-    }
-    return __Pyx_PyUnicode_BuildFromAscii(ulength, dpos, (int) length, prepend_sign, padding_char);
-}
-
-/* GetException */
-      #if CYTHON_FAST_THREAD_STATE
-static int __Pyx__GetException(PyThreadState *tstate, PyObject **type, PyObject **value, PyObject **tb) {
-#else
-static int __Pyx_GetException(PyObject **type, PyObject **value, PyObject **tb) {
-#endif
-    PyObject *local_type, *local_value, *local_tb;
-#if CYTHON_FAST_THREAD_STATE
-    PyObject *tmp_type, *tmp_value, *tmp_tb;
-    local_type = tstate->curexc_type;
-    local_value = tstate->curexc_value;
-    local_tb = tstate->curexc_traceback;
-    tstate->curexc_type = 0;
-    tstate->curexc_value = 0;
-    tstate->curexc_traceback = 0;
-#else
-    PyErr_Fetch(&local_type, &local_value, &local_tb);
-#endif
-    PyErr_NormalizeException(&local_type, &local_value, &local_tb);
-#if CYTHON_FAST_THREAD_STATE
-    if (unlikely(tstate->curexc_type))
-#else
-    if (unlikely(PyErr_Occurred()))
-#endif
-        goto bad;
-    #if PY_MAJOR_VERSION >= 3
-    if (local_tb) {
-        if (unlikely(PyException_SetTraceback(local_value, local_tb) < 0))
-            goto bad;
-    }
-    #endif
-    Py_XINCREF(local_tb);
-    Py_XINCREF(local_type);
-    Py_XINCREF(local_value);
-    *type = local_type;
-    *value = local_value;
-    *tb = local_tb;
-#if CYTHON_FAST_THREAD_STATE
-    #if PY_VERSION_HEX >= 0x030700A3
-    tmp_type = tstate->exc_state.exc_type;
-    tmp_value = tstate->exc_state.exc_value;
-    tmp_tb = tstate->exc_state.exc_traceback;
-    tstate->exc_state.exc_type = local_type;
-    tstate->exc_state.exc_value = local_value;
-    tstate->exc_state.exc_traceback = local_tb;
-    #else
-    tmp_type = tstate->exc_type;
-    tmp_value = tstate->exc_value;
-    tmp_tb = tstate->exc_traceback;
-    tstate->exc_type = local_type;
-    tstate->exc_value = local_value;
-    tstate->exc_traceback = local_tb;
-    #endif
-    Py_XDECREF(tmp_type);
-    Py_XDECREF(tmp_value);
-    Py_XDECREF(tmp_tb);
-#else
-    PyErr_SetExcInfo(local_type, local_value, local_tb);
-#endif
-    return 0;
-bad:
-    *type = 0;
-    *value = 0;
-    *tb = 0;
-    Py_XDECREF(local_type);
-    Py_XDECREF(local_value);
-    Py_XDECREF(local_tb);
-    return -1;
-}
-
-/* SwapException */
-        #if CYTHON_FAST_THREAD_STATE
-static CYTHON_INLINE void __Pyx__ExceptionSwap(PyThreadState *tstate, PyObject **type, PyObject **value, PyObject **tb) {
-    PyObject *tmp_type, *tmp_value, *tmp_tb;
-    #if PY_VERSION_HEX >= 0x030700A3
-    tmp_type = tstate->exc_state.exc_type;
-    tmp_value = tstate->exc_state.exc_value;
-    tmp_tb = tstate->exc_state.exc_traceback;
-    tstate->exc_state.exc_type = *type;
-    tstate->exc_state.exc_value = *value;
-    tstate->exc_state.exc_traceback = *tb;
-    #else
-    tmp_type = tstate->exc_type;
-    tmp_value = tstate->exc_value;
-    tmp_tb = tstate->exc_traceback;
-    tstate->exc_type = *type;
-    tstate->exc_value = *value;
-    tstate->exc_traceback = *tb;
-    #endif
-    *type = tmp_type;
-    *value = tmp_value;
-    *tb = tmp_tb;
-}
-#else
-static CYTHON_INLINE void __Pyx_ExceptionSwap(PyObject **type, PyObject **value, PyObject **tb) {
-    PyObject *tmp_type, *tmp_value, *tmp_tb;
-    PyErr_GetExcInfo(&tmp_type, &tmp_value, &tmp_tb);
-    PyErr_SetExcInfo(*type, *value, *tb);
-    *type = tmp_type;
-    *value = tmp_value;
-    *tb = tmp_tb;
-}
-#endif
-
-/* SaveResetException */
-        #if CYTHON_FAST_THREAD_STATE
-static CYTHON_INLINE void __Pyx__ExceptionSave(PyThreadState *tstate, PyObject **type, PyObject **value, PyObject **tb) {
-    #if PY_VERSION_HEX >= 0x030700A3
-    *type = tstate->exc_state.exc_type;
-    *value = tstate->exc_state.exc_value;
-    *tb = tstate->exc_state.exc_traceback;
-    #else
-    *type = tstate->exc_type;
-    *value = tstate->exc_value;
-    *tb = tstate->exc_traceback;
-    #endif
-    Py_XINCREF(*type);
-    Py_XINCREF(*value);
-    Py_XINCREF(*tb);
-}
-static CYTHON_INLINE void __Pyx__ExceptionReset(PyThreadState *tstate, PyObject *type, PyObject *value, PyObject *tb) {
-    PyObject *tmp_type, *tmp_value, *tmp_tb;
-    #if PY_VERSION_HEX >= 0x030700A3
-    tmp_type = tstate->exc_state.exc_type;
-    tmp_value = tstate->exc_state.exc_value;
-    tmp_tb = tstate->exc_state.exc_traceback;
-    tstate->exc_state.exc_type = type;
-    tstate->exc_state.exc_value = value;
-    tstate->exc_state.exc_traceback = tb;
-    #else
-    tmp_type = tstate->exc_type;
-    tmp_value = tstate->exc_value;
-    tmp_tb = tstate->exc_traceback;
-    tstate->exc_type = type;
-    tstate->exc_value = value;
-    tstate->exc_traceback = tb;
-    #endif
-    Py_XDECREF(tmp_type);
-    Py_XDECREF(tmp_value);
-    Py_XDECREF(tmp_tb);
-}
-#endif
-
-/* Import */
-        static PyObject *__Pyx_Import(PyObject *name, PyObject *from_list, int level) {
-    PyObject *empty_list = 0;
-    PyObject *module = 0;
-    PyObject *global_dict = 0;
-    PyObject *empty_dict = 0;
-    PyObject *list;
-    #if PY_MAJOR_VERSION < 3
-    PyObject *py_import;
-    py_import = __Pyx_PyObject_GetAttrStr(__pyx_b, __pyx_n_s_import);
-    if (!py_import)
-        goto bad;
-    #endif
-    if (from_list)
-        list = from_list;
-    else {
-        empty_list = PyList_New(0);
-        if (!empty_list)
-            goto bad;
-        list = empty_list;
-    }
-    global_dict = PyModule_GetDict(__pyx_m);
-    if (!global_dict)
-        goto bad;
-    empty_dict = PyDict_New();
-    if (!empty_dict)
-        goto bad;
-    {
-        #if PY_MAJOR_VERSION >= 3
-        if (level == -1) {
-            if (strchr(__Pyx_MODULE_NAME, '.')) {
-                module = PyImport_ImportModuleLevelObject(
-                    name, global_dict, empty_dict, list, 1);
-                if (!module) {
-                    if (!PyErr_ExceptionMatches(PyExc_ImportError))
-                        goto bad;
-                    PyErr_Clear();
-                }
-            }
-            level = 0;
-        }
-        #endif
-        if (!module) {
-            #if PY_MAJOR_VERSION < 3
-            PyObject *py_level = PyInt_FromLong(level);
-            if (!py_level)
-                goto bad;
-            module = PyObject_CallFunctionObjArgs(py_import,
-                name, global_dict, empty_dict, list, py_level, NULL);
-            Py_DECREF(py_level);
-            #else
-            module = PyImport_ImportModuleLevelObject(
-                name, global_dict, empty_dict, list, level);
-            #endif
-        }
-    }
-bad:
-    #if PY_MAJOR_VERSION < 3
-    Py_XDECREF(py_import);
-    #endif
-    Py_XDECREF(empty_list);
-    Py_XDECREF(empty_dict);
-    return module;
-}
-
-/* ImportFrom */
-        static PyObject* __Pyx_ImportFrom(PyObject* module, PyObject* name) {
-    PyObject* value = __Pyx_PyObject_GetAttrStr(module, name);
-    if (unlikely(!value) && PyErr_ExceptionMatches(PyExc_AttributeError)) {
-        PyErr_Format(PyExc_ImportError,
-        #if PY_MAJOR_VERSION < 3
-            "cannot import name %.230s", PyString_AS_STRING(name));
-        #else
-            "cannot import name %S", name);
-        #endif
-    }
-    return value;
-}
-
-/* CLineInTraceback */
-        #ifndef CYTHON_CLINE_IN_TRACEBACK
-static int __Pyx_CLineForTraceback(CYTHON_UNUSED PyThreadState *tstate, int c_line) {
-    PyObject *use_cline;
-    PyObject *ptype, *pvalue, *ptraceback;
-#if CYTHON_COMPILING_IN_CPYTHON
-    PyObject **cython_runtime_dict;
-#endif
-    if (unlikely(!__pyx_cython_runtime)) {
-        return c_line;
-    }
-    __Pyx_ErrFetchInState(tstate, &ptype, &pvalue, &ptraceback);
-#if CYTHON_COMPILING_IN_CPYTHON
-    cython_runtime_dict = _PyObject_GetDictPtr(__pyx_cython_runtime);
-    if (likely(cython_runtime_dict)) {
-      use_cline = __Pyx_PyDict_GetItemStr(*cython_runtime_dict, __pyx_n_s_cline_in_traceback);
-    } else
-#endif
-    {
-      PyObject *use_cline_obj = __Pyx_PyObject_GetAttrStr(__pyx_cython_runtime, __pyx_n_s_cline_in_traceback);
-      if (use_cline_obj) {
-        use_cline = PyObject_Not(use_cline_obj) ? Py_False : Py_True;
-        Py_DECREF(use_cline_obj);
-      } else {
-        PyErr_Clear();
-        use_cline = NULL;
-      }
-    }
-    if (!use_cline) {
-        c_line = 0;
-        PyObject_SetAttr(__pyx_cython_runtime, __pyx_n_s_cline_in_traceback, Py_False);
-    }
-    else if (PyObject_Not(use_cline) != 0) {
-        c_line = 0;
-    }
-    __Pyx_ErrRestoreInState(tstate, ptype, pvalue, ptraceback);
-    return c_line;
-}
-#endif
-
-/* CodeObjectCache */
-        static int __pyx_bisect_code_objects(__Pyx_CodeObjectCacheEntry* entries, int count, int code_line) {
-    int start = 0, mid = 0, end = count - 1;
-    if (end >= 0 && code_line > entries[end].code_line) {
-        return count;
-    }
-    while (start < end) {
-        mid = start + (end - start) / 2;
-        if (code_line < entries[mid].code_line) {
-            end = mid;
-        } else if (code_line > entries[mid].code_line) {
-             start = mid + 1;
-        } else {
-            return mid;
-        }
-    }
-    if (code_line <= entries[mid].code_line) {
-        return mid;
-    } else {
-        return mid + 1;
-    }
-}
-static PyCodeObject *__pyx_find_code_object(int code_line) {
-    PyCodeObject* code_object;
-    int pos;
-    if (unlikely(!code_line) || unlikely(!__pyx_code_cache.entries)) {
-        return NULL;
-    }
-    pos = __pyx_bisect_code_objects(__pyx_code_cache.entries, __pyx_code_cache.count, code_line);
-    if (unlikely(pos >= __pyx_code_cache.count) || unlikely(__pyx_code_cache.entries[pos].code_line != code_line)) {
-        return NULL;
-    }
-    code_object = __pyx_code_cache.entries[pos].code_object;
-    Py_INCREF(code_object);
-    return code_object;
-}
-static void __pyx_insert_code_object(int code_line, PyCodeObject* code_object) {
-    int pos, i;
-    __Pyx_CodeObjectCacheEntry* entries = __pyx_code_cache.entries;
-    if (unlikely(!code_line)) {
-        return;
-    }
-    if (unlikely(!entries)) {
-        entries = (__Pyx_CodeObjectCacheEntry*)PyMem_Malloc(64*sizeof(__Pyx_CodeObjectCacheEntry));
-        if (likely(entries)) {
-            __pyx_code_cache.entries = entries;
-            __pyx_code_cache.max_count = 64;
-            __pyx_code_cache.count = 1;
-            entries[0].code_line = code_line;
-            entries[0].code_object = code_object;
-            Py_INCREF(code_object);
-        }
-        return;
-    }
-    pos = __pyx_bisect_code_objects(__pyx_code_cache.entries, __pyx_code_cache.count, code_line);
-    if ((pos < __pyx_code_cache.count) && unlikely(__pyx_code_cache.entries[pos].code_line == code_line)) {
-        PyCodeObject* tmp = entries[pos].code_object;
-        entries[pos].code_object = code_object;
-        Py_DECREF(tmp);
-        return;
-    }
-    if (__pyx_code_cache.count == __pyx_code_cache.max_count) {
-        int new_max = __pyx_code_cache.max_count + 64;
-        entries = (__Pyx_CodeObjectCacheEntry*)PyMem_Realloc(
-            __pyx_code_cache.entries, (size_t)new_max*sizeof(__Pyx_CodeObjectCacheEntry));
-        if (unlikely(!entries)) {
-            return;
-        }
-        __pyx_code_cache.entries = entries;
-        __pyx_code_cache.max_count = new_max;
-    }
-    for (i=__pyx_code_cache.count; i>pos; i--) {
-        entries[i] = entries[i-1];
-    }
-    entries[pos].code_line = code_line;
-    entries[pos].code_object = code_object;
-    __pyx_code_cache.count++;
-    Py_INCREF(code_object);
-}
-
-/* AddTraceback */
-        #include "compile.h"
-#include "frameobject.h"
-#include "traceback.h"
-static PyCodeObject* __Pyx_CreateCodeObjectForTraceback(
-            const char *funcname, int c_line,
-            int py_line, const char *filename) {
-    PyCodeObject *py_code = 0;
-    PyObject *py_srcfile = 0;
-    PyObject *py_funcname = 0;
-    #if PY_MAJOR_VERSION < 3
-    py_srcfile = PyString_FromString(filename);
-    #else
-    py_srcfile = PyUnicode_FromString(filename);
-    #endif
-    if (!py_srcfile) goto bad;
-    if (c_line) {
-        #if PY_MAJOR_VERSION < 3
-        py_funcname = PyString_FromFormat( "%s (%s:%d)", funcname, __pyx_cfilenm, c_line);
-        #else
-        py_funcname = PyUnicode_FromFormat( "%s (%s:%d)", funcname, __pyx_cfilenm, c_line);
-        #endif
-    }
-    else {
-        #if PY_MAJOR_VERSION < 3
-        py_funcname = PyString_FromString(funcname);
-        #else
-        py_funcname = PyUnicode_FromString(funcname);
-        #endif
-    }
-    if (!py_funcname) goto bad;
-    py_code = __Pyx_PyCode_New(
-        0,
-        0,
-        0,
-        0,
-        0,
-        __pyx_empty_bytes, /*PyObject *code,*/
-        __pyx_empty_tuple, /*PyObject *consts,*/
-        __pyx_empty_tuple, /*PyObject *names,*/
-        __pyx_empty_tuple, /*PyObject *varnames,*/
-        __pyx_empty_tuple, /*PyObject *freevars,*/
-        __pyx_empty_tuple, /*PyObject *cellvars,*/
-        py_srcfile,   /*PyObject *filename,*/
-        py_funcname,  /*PyObject *name,*/
-        py_line,
-        __pyx_empty_bytes  /*PyObject *lnotab*/
-    );
-    Py_DECREF(py_srcfile);
-    Py_DECREF(py_funcname);
-    return py_code;
-bad:
-    Py_XDECREF(py_srcfile);
-    Py_XDECREF(py_funcname);
-    return NULL;
-}
-static void __Pyx_AddTraceback(const char *funcname, int c_line,
-                               int py_line, const char *filename) {
-    PyCodeObject *py_code = 0;
-    PyFrameObject *py_frame = 0;
-    PyThreadState *tstate = __Pyx_PyThreadState_Current;
-    if (c_line) {
-        c_line = __Pyx_CLineForTraceback(tstate, c_line);
-    }
-    py_code = __pyx_find_code_object(c_line ? -c_line : py_line);
-    if (!py_code) {
-        py_code = __Pyx_CreateCodeObjectForTraceback(
-            funcname, c_line, py_line, filename);
-        if (!py_code) goto bad;
-        __pyx_insert_code_object(c_line ? -c_line : py_line, py_code);
-    }
-    py_frame = PyFrame_New(
-        tstate,            /*PyThreadState *tstate,*/
-        py_code,           /*PyCodeObject *code,*/
-        __pyx_d,    /*PyObject *globals,*/
-        0                  /*PyObject *locals*/
-    );
-    if (!py_frame) goto bad;
-    __Pyx_PyFrame_SetLineNumber(py_frame, py_line);
-    PyTraceBack_Here(py_frame);
-bad:
-    Py_XDECREF(py_code);
-    Py_XDECREF(py_frame);
-}
-
-/* CIntToPy */
-        static CYTHON_INLINE PyObject* __Pyx_PyInt_From_long(long value) {
-    const long neg_one = (long) -1, const_zero = (long) 0;
-    const int is_unsigned = neg_one > const_zero;
-    if (is_unsigned) {
-        if (sizeof(long) < sizeof(long)) {
-            return PyInt_FromLong((long) value);
-        } else if (sizeof(long) <= sizeof(unsigned long)) {
-            return PyLong_FromUnsignedLong((unsigned long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(long) <= sizeof(unsigned PY_LONG_LONG)) {
-            return PyLong_FromUnsignedLongLong((unsigned PY_LONG_LONG) value);
-#endif
-        }
-    } else {
-        if (sizeof(long) <= sizeof(long)) {
-            return PyInt_FromLong((long) value);
-#ifdef HAVE_LONG_LONG
-        } else if (sizeof(long) <= sizeof(PY_LONG_LONG)) {
-            return PyLong_FromLongLong((PY_LONG_LONG) value);
-#endif
-        }
-    }
-    {
-        int one = 1; int little = (int)*(unsigned char *)&one;
-        unsigned char *bytes = (unsigned char *)&value;
-        return _PyLong_FromByteArray(bytes, sizeof(long),
-                                     little, !is_unsigned);
-    }
-}
-
-/* CIntFromPyVerify */
-        #define __PYX_VERIFY_RETURN_INT(target_type, func_type, func_value)\
-    __PYX__VERIFY_RETURN_INT(target_type, func_type, func_value, 0)
-#define __PYX_VERIFY_RETURN_INT_EXC(target_type, func_type, func_value)\
-    __PYX__VERIFY_RETURN_INT(target_type, func_type, func_value, 1)
-#define __PYX__VERIFY_RETURN_INT(target_type, func_type, func_value, exc)\
-    {\
-        func_type value = func_value;\
-        if (sizeof(target_type) < sizeof(func_type)) {\
-            if (unlikely(value != (func_type) (target_type) value)) {\
-                func_type zero = 0;\
-                if (exc && unlikely(value == (func_type)-1 && PyErr_Occurred()))\
-                    return (target_type) -1;\
-                if (is_unsigned && unlikely(value < zero))\
-                    goto raise_neg_overflow;\
-                else\
-                    goto raise_overflow;\
-            }\
-        }\
-        return (target_type) value;\
-    }
-
-/* CIntFromPy */
-        static CYTHON_INLINE long __Pyx_PyInt_As_long(PyObject *x) {
-    const long neg_one = (long) -1, const_zero = (long) 0;
-    const int is_unsigned = neg_one > const_zero;
-#if PY_MAJOR_VERSION < 3
-    if (likely(PyInt_Check(x))) {
-        if (sizeof(long) < sizeof(long)) {
-            __PYX_VERIFY_RETURN_INT(long, long, PyInt_AS_LONG(x))
-        } else {
-            long val = PyInt_AS_LONG(x);
-            if (is_unsigned && unlikely(val < 0)) {
-                goto raise_neg_overflow;
-            }
-            return (long) val;
-        }
-    } else
-#endif
-    if (likely(PyLong_Check(x))) {
-        if (is_unsigned) {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (long) 0;
-                case  1: __PYX_VERIFY_RETURN_INT(long, digit, digits[0])
-                case 2:
-                    if (8 * sizeof(long) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) >= 2 * PyLong_SHIFT) {
-                            return (long) (((((long)digits[1]) << PyLong_SHIFT) | (long)digits[0]));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(long) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) >= 3 * PyLong_SHIFT) {
-                            return (long) (((((((long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0]));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(long) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) >= 4 * PyLong_SHIFT) {
-                            return (long) (((((((((long)digits[3]) << PyLong_SHIFT) | (long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0]));
-                        }
-                    }
-                    break;
-            }
-#endif
-#if CYTHON_COMPILING_IN_CPYTHON
-            if (unlikely(Py_SIZE(x) < 0)) {
-                goto raise_neg_overflow;
-            }
-#else
-            {
-                int result = PyObject_RichCompareBool(x, Py_False, Py_LT);
-                if (unlikely(result < 0))
-                    return (long) -1;
-                if (unlikely(result == 1))
-                    goto raise_neg_overflow;
-            }
-#endif
-            if (sizeof(long) <= sizeof(unsigned long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(long, unsigned long, PyLong_AsUnsignedLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(long) <= sizeof(unsigned PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(long, unsigned PY_LONG_LONG, PyLong_AsUnsignedLongLong(x))
-#endif
-            }
-        } else {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (long) 0;
-                case -1: __PYX_VERIFY_RETURN_INT(long, sdigit, (sdigit) (-(sdigit)digits[0]))
-                case  1: __PYX_VERIFY_RETURN_INT(long,  digit, +digits[0])
-                case -2:
-                    if (8 * sizeof(long) - 1 > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, long, -(long) (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 2 * PyLong_SHIFT) {
-                            return (long) (((long)-1)*(((((long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-                case 2:
-                    if (8 * sizeof(long) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 2 * PyLong_SHIFT) {
-                            return (long) ((((((long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-                case -3:
-                    if (8 * sizeof(long) - 1 > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, long, -(long) (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 3 * PyLong_SHIFT) {
-                            return (long) (((long)-1)*(((((((long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(long) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 3 * PyLong_SHIFT) {
-                            return (long) ((((((((long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-                case -4:
-                    if (8 * sizeof(long) - 1 > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, long, -(long) (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 4 * PyLong_SHIFT) {
-                            return (long) (((long)-1)*(((((((((long)digits[3]) << PyLong_SHIFT) | (long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(long) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(long) - 1 > 4 * PyLong_SHIFT) {
-                            return (long) ((((((((((long)digits[3]) << PyLong_SHIFT) | (long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
-                        }
-                    }
-                    break;
-            }
-#endif
-            if (sizeof(long) <= sizeof(long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(long, long, PyLong_AsLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(long) <= sizeof(PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(long, PY_LONG_LONG, PyLong_AsLongLong(x))
-#endif
-            }
-        }
-        {
-#if CYTHON_COMPILING_IN_PYPY && !defined(_PyLong_AsByteArray)
-            PyErr_SetString(PyExc_RuntimeError,
-                            "_PyLong_AsByteArray() not available in PyPy, cannot convert large numbers");
-#else
-            long val;
-            PyObject *v = __Pyx_PyNumber_IntOrLong(x);
- #if PY_MAJOR_VERSION < 3
-            if (likely(v) && !PyLong_Check(v)) {
-                PyObject *tmp = v;
-                v = PyNumber_Long(tmp);
-                Py_DECREF(tmp);
-            }
- #endif
-            if (likely(v)) {
-                int one = 1; int is_little = (int)*(unsigned char *)&one;
-                unsigned char *bytes = (unsigned char *)&val;
-                int ret = _PyLong_AsByteArray((PyLongObject *)v,
-                                              bytes, sizeof(val),
-                                              is_little, !is_unsigned);
-                Py_DECREF(v);
-                if (likely(!ret))
-                    return val;
-            }
-#endif
-            return (long) -1;
-        }
-    } else {
-        long val;
-        PyObject *tmp = __Pyx_PyNumber_IntOrLong(x);
-        if (!tmp) return (long) -1;
-        val = __Pyx_PyInt_As_long(tmp);
-        Py_DECREF(tmp);
-        return val;
-    }
-raise_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "value too large to convert to long");
-    return (long) -1;
-raise_neg_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "can't convert negative value to long");
-    return (long) -1;
-}
-
-/* CIntFromPy */
-        static CYTHON_INLINE int __Pyx_PyInt_As_int(PyObject *x) {
-    const int neg_one = (int) -1, const_zero = (int) 0;
-    const int is_unsigned = neg_one > const_zero;
-#if PY_MAJOR_VERSION < 3
-    if (likely(PyInt_Check(x))) {
-        if (sizeof(int) < sizeof(long)) {
-            __PYX_VERIFY_RETURN_INT(int, long, PyInt_AS_LONG(x))
-        } else {
-            long val = PyInt_AS_LONG(x);
-            if (is_unsigned && unlikely(val < 0)) {
-                goto raise_neg_overflow;
-            }
-            return (int) val;
-        }
-    } else
-#endif
-    if (likely(PyLong_Check(x))) {
-        if (is_unsigned) {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (int) 0;
-                case  1: __PYX_VERIFY_RETURN_INT(int, digit, digits[0])
-                case 2:
-                    if (8 * sizeof(int) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) >= 2 * PyLong_SHIFT) {
-                            return (int) (((((int)digits[1]) << PyLong_SHIFT) | (int)digits[0]));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(int) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) >= 3 * PyLong_SHIFT) {
-                            return (int) (((((((int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0]));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(int) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) >= 4 * PyLong_SHIFT) {
-                            return (int) (((((((((int)digits[3]) << PyLong_SHIFT) | (int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0]));
-                        }
-                    }
-                    break;
-            }
-#endif
-#if CYTHON_COMPILING_IN_CPYTHON
-            if (unlikely(Py_SIZE(x) < 0)) {
-                goto raise_neg_overflow;
-            }
-#else
-            {
-                int result = PyObject_RichCompareBool(x, Py_False, Py_LT);
-                if (unlikely(result < 0))
-                    return (int) -1;
-                if (unlikely(result == 1))
-                    goto raise_neg_overflow;
-            }
-#endif
-            if (sizeof(int) <= sizeof(unsigned long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(int, unsigned long, PyLong_AsUnsignedLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(int) <= sizeof(unsigned PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(int, unsigned PY_LONG_LONG, PyLong_AsUnsignedLongLong(x))
-#endif
-            }
-        } else {
-#if CYTHON_USE_PYLONG_INTERNALS
-            const digit* digits = ((PyLongObject*)x)->ob_digit;
-            switch (Py_SIZE(x)) {
-                case  0: return (int) 0;
-                case -1: __PYX_VERIFY_RETURN_INT(int, sdigit, (sdigit) (-(sdigit)digits[0]))
-                case  1: __PYX_VERIFY_RETURN_INT(int,  digit, +digits[0])
-                case -2:
-                    if (8 * sizeof(int) - 1 > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, long, -(long) (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 2 * PyLong_SHIFT) {
-                            return (int) (((int)-1)*(((((int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-                case 2:
-                    if (8 * sizeof(int) > 1 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 2 * PyLong_SHIFT) {
-                            return (int) ((((((int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-                case -3:
-                    if (8 * sizeof(int) - 1 > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, long, -(long) (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 3 * PyLong_SHIFT) {
-                            return (int) (((int)-1)*(((((((int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-                case 3:
-                    if (8 * sizeof(int) > 2 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 3 * PyLong_SHIFT) {
-                            return (int) ((((((((int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-                case -4:
-                    if (8 * sizeof(int) - 1 > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, long, -(long) (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 4 * PyLong_SHIFT) {
-                            return (int) (((int)-1)*(((((((((int)digits[3]) << PyLong_SHIFT) | (int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-                case 4:
-                    if (8 * sizeof(int) > 3 * PyLong_SHIFT) {
-                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
-                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
-                        } else if (8 * sizeof(int) - 1 > 4 * PyLong_SHIFT) {
-                            return (int) ((((((((((int)digits[3]) << PyLong_SHIFT) | (int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
-                        }
-                    }
-                    break;
-            }
-#endif
-            if (sizeof(int) <= sizeof(long)) {
-                __PYX_VERIFY_RETURN_INT_EXC(int, long, PyLong_AsLong(x))
-#ifdef HAVE_LONG_LONG
-            } else if (sizeof(int) <= sizeof(PY_LONG_LONG)) {
-                __PYX_VERIFY_RETURN_INT_EXC(int, PY_LONG_LONG, PyLong_AsLongLong(x))
-#endif
-            }
-        }
-        {
-#if CYTHON_COMPILING_IN_PYPY && !defined(_PyLong_AsByteArray)
-            PyErr_SetString(PyExc_RuntimeError,
-                            "_PyLong_AsByteArray() not available in PyPy, cannot convert large numbers");
-#else
-            int val;
-            PyObject *v = __Pyx_PyNumber_IntOrLong(x);
- #if PY_MAJOR_VERSION < 3
-            if (likely(v) && !PyLong_Check(v)) {
-                PyObject *tmp = v;
-                v = PyNumber_Long(tmp);
-                Py_DECREF(tmp);
-            }
- #endif
-            if (likely(v)) {
-                int one = 1; int is_little = (int)*(unsigned char *)&one;
-                unsigned char *bytes = (unsigned char *)&val;
-                int ret = _PyLong_AsByteArray((PyLongObject *)v,
-                                              bytes, sizeof(val),
-                                              is_little, !is_unsigned);
-                Py_DECREF(v);
-                if (likely(!ret))
-                    return val;
-            }
-#endif
-            return (int) -1;
-        }
-    } else {
-        int val;
-        PyObject *tmp = __Pyx_PyNumber_IntOrLong(x);
-        if (!tmp) return (int) -1;
-        val = __Pyx_PyInt_As_int(tmp);
-        Py_DECREF(tmp);
-        return val;
-    }
-raise_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "value too large to convert to int");
-    return (int) -1;
-raise_neg_overflow:
-    PyErr_SetString(PyExc_OverflowError,
-        "can't convert negative value to int");
-    return (int) -1;
-}
-
-/* FastTypeChecks */
-        #if CYTHON_COMPILING_IN_CPYTHON
-static int __Pyx_InBases(PyTypeObject *a, PyTypeObject *b) {
-    while (a) {
-        a = a->tp_base;
-        if (a == b)
-            return 1;
-    }
-    return b == &PyBaseObject_Type;
-}
-static CYTHON_INLINE int __Pyx_IsSubtype(PyTypeObject *a, PyTypeObject *b) {
-    PyObject *mro;
-    if (a == b) return 1;
-    mro = a->tp_mro;
-    if (likely(mro)) {
-        Py_ssize_t i, n;
-        n = PyTuple_GET_SIZE(mro);
-        for (i = 0; i < n; i++) {
-            if (PyTuple_GET_ITEM(mro, i) == (PyObject *)b)
-                return 1;
-        }
-        return 0;
-    }
-    return __Pyx_InBases(a, b);
-}
-#if PY_MAJOR_VERSION == 2
-static int __Pyx_inner_PyErr_GivenExceptionMatches2(PyObject *err, PyObject* exc_type1, PyObject* exc_type2) {
-    PyObject *exception, *value, *tb;
-    int res;
-    __Pyx_PyThreadState_declare
-    __Pyx_PyThreadState_assign
-    __Pyx_ErrFetch(&exception, &value, &tb);
-    res = exc_type1 ? PyObject_IsSubclass(err, exc_type1) : 0;
-    if (unlikely(res == -1)) {
-        PyErr_WriteUnraisable(err);
-        res = 0;
-    }
-    if (!res) {
-        res = PyObject_IsSubclass(err, exc_type2);
-        if (unlikely(res == -1)) {
-            PyErr_WriteUnraisable(err);
-            res = 0;
-        }
-    }
-    __Pyx_ErrRestore(exception, value, tb);
-    return res;
-}
-#else
-static CYTHON_INLINE int __Pyx_inner_PyErr_GivenExceptionMatches2(PyObject *err, PyObject* exc_type1, PyObject *exc_type2) {
-    int res = exc_type1 ? __Pyx_IsSubtype((PyTypeObject*)err, (PyTypeObject*)exc_type1) : 0;
-    if (!res) {
-        res = __Pyx_IsSubtype((PyTypeObject*)err, (PyTypeObject*)exc_type2);
-    }
-    return res;
-}
-#endif
-static int __Pyx_PyErr_GivenExceptionMatchesTuple(PyObject *exc_type, PyObject *tuple) {
-    Py_ssize_t i, n;
-    assert(PyExceptionClass_Check(exc_type));
-    n = PyTuple_GET_SIZE(tuple);
-#if PY_MAJOR_VERSION >= 3
-    for (i=0; i<n; i++) {
-        if (exc_type == PyTuple_GET_ITEM(tuple, i)) return 1;
-    }
-#endif
-    for (i=0; i<n; i++) {
-        PyObject *t = PyTuple_GET_ITEM(tuple, i);
-        #if PY_MAJOR_VERSION < 3
-        if (likely(exc_type == t)) return 1;
-        #endif
-        if (likely(PyExceptionClass_Check(t))) {
-            if (__Pyx_inner_PyErr_GivenExceptionMatches2(exc_type, NULL, t)) return 1;
-        } else {
-        }
-    }
-    return 0;
-}
-static CYTHON_INLINE int __Pyx_PyErr_GivenExceptionMatches(PyObject *err, PyObject* exc_type) {
-    if (likely(err == exc_type)) return 1;
-    if (likely(PyExceptionClass_Check(err))) {
-        if (likely(PyExceptionClass_Check(exc_type))) {
-            return __Pyx_inner_PyErr_GivenExceptionMatches2(err, NULL, exc_type);
-        } else if (likely(PyTuple_Check(exc_type))) {
-            return __Pyx_PyErr_GivenExceptionMatchesTuple(err, exc_type);
-        } else {
-        }
-    }
-    return PyErr_GivenExceptionMatches(err, exc_type);
-}
-static CYTHON_INLINE int __Pyx_PyErr_GivenExceptionMatches2(PyObject *err, PyObject *exc_type1, PyObject *exc_type2) {
-    assert(PyExceptionClass_Check(exc_type1));
-    assert(PyExceptionClass_Check(exc_type2));
-    if (likely(err == exc_type1 || err == exc_type2)) return 1;
-    if (likely(PyExceptionClass_Check(err))) {
-        return __Pyx_inner_PyErr_GivenExceptionMatches2(err, exc_type1, exc_type2);
-    }
-    return (PyErr_GivenExceptionMatches(err, exc_type1) || PyErr_GivenExceptionMatches(err, exc_type2));
-}
-#endif
-
-/* CheckBinaryVersion */
-        static int __Pyx_check_binary_version(void) {
-    char ctversion[4], rtversion[4];
-    PyOS_snprintf(ctversion, 4, "%d.%d", PY_MAJOR_VERSION, PY_MINOR_VERSION);
-    PyOS_snprintf(rtversion, 4, "%s", Py_GetVersion());
-    if (ctversion[0] != rtversion[0] || ctversion[2] != rtversion[2]) {
-        char message[200];
-        PyOS_snprintf(message, sizeof(message),
-                      "compiletime version %s of module '%.100s' "
-                      "does not match runtime version %s",
-                      ctversion, __Pyx_MODULE_NAME, rtversion);
-        return PyErr_WarnEx(NULL, message, 1);
-    }
-    return 0;
-}
-
-/* PyObjectSetAttrStr */
-        #if CYTHON_USE_TYPE_SLOTS
-static CYTHON_INLINE int __Pyx_PyObject_SetAttrStr(PyObject* obj, PyObject* attr_name, PyObject* value) {
-    PyTypeObject* tp = Py_TYPE(obj);
-    if (likely(tp->tp_setattro))
-        return tp->tp_setattro(obj, attr_name, value);
-#if PY_MAJOR_VERSION < 3
-    if (likely(tp->tp_setattr))
-        return tp->tp_setattr(obj, PyString_AS_STRING(attr_name), value);
-#endif
-    return PyObject_SetAttr(obj, attr_name, value);
-}
-#endif
-
-/* VoidPtrExport */
-        static int __Pyx_ExportVoidPtr(PyObject *name, void *p, const char *sig) {
-    PyObject *d;
-    PyObject *cobj = 0;
-    d = PyDict_GetItem(__pyx_d, __pyx_n_s_pyx_capi);
-    Py_XINCREF(d);
-    if (!d) {
-        d = PyDict_New();
-        if (!d)
-            goto bad;
-        if (__Pyx_PyObject_SetAttrStr(__pyx_m, __pyx_n_s_pyx_capi, d) < 0)
-            goto bad;
-    }
-#if PY_VERSION_HEX >= 0x02070000
-    cobj = PyCapsule_New(p, sig, 0);
-#else
-    cobj = PyCObject_FromVoidPtrAndDesc(p, (void *)sig, 0);
-#endif
-    if (!cobj)
-        goto bad;
-    if (PyDict_SetItem(d, name, cobj) < 0)
-        goto bad;
-    Py_DECREF(cobj);
-    Py_DECREF(d);
-    return 0;
-bad:
-    Py_XDECREF(cobj);
-    Py_XDECREF(d);
-    return -1;
-}
-
-/* FunctionExport */
-        static int __Pyx_ExportFunction(const char *name, void (*f)(void), const char *sig) {
-    PyObject *d = 0;
-    PyObject *cobj = 0;
-    union {
-        void (*fp)(void);
-        void *p;
-    } tmp;
-    d = PyObject_GetAttrString(__pyx_m, (char *)"__pyx_capi__");
-    if (!d) {
-        PyErr_Clear();
-        d = PyDict_New();
-        if (!d)
-            goto bad;
-        Py_INCREF(d);
-        if (PyModule_AddObject(__pyx_m, (char *)"__pyx_capi__", d) < 0)
-            goto bad;
-    }
-    tmp.fp = f;
-#if PY_VERSION_HEX >= 0x02070000
-    cobj = PyCapsule_New(tmp.p, sig, 0);
-#else
-    cobj = PyCObject_FromVoidPtrAndDesc(tmp.p, (void *)sig, 0);
-#endif
-    if (!cobj)
-        goto bad;
-    if (PyDict_SetItemString(d, name, cobj) < 0)
-        goto bad;
-    Py_DECREF(cobj);
-    Py_DECREF(d);
-    return 0;
-bad:
-    Py_XDECREF(cobj);
-    Py_XDECREF(d);
-    return -1;
-}
-
-/* ModuleImport */
-        #ifndef __PYX_HAVE_RT_ImportModule
-#define __PYX_HAVE_RT_ImportModule
-static PyObject *__Pyx_ImportModule(const char *name) {
-    PyObject *py_name = 0;
-    PyObject *py_module = 0;
-    py_name = __Pyx_PyIdentifier_FromString(name);
-    if (!py_name)
-        goto bad;
-    py_module = PyImport_Import(py_name);
-    Py_DECREF(py_name);
-    return py_module;
-bad:
-    Py_XDECREF(py_name);
-    return 0;
-}
-#endif
-
-/* TypeImport */
-        #ifndef __PYX_HAVE_RT_ImportType
-#define __PYX_HAVE_RT_ImportType
-static PyTypeObject *__Pyx_ImportType(const char *module_name, const char *class_name,
-    size_t size, int strict)
-{
-    PyObject *py_module = 0;
-    PyObject *result = 0;
-    PyObject *py_name = 0;
-    char warning[200];
-    Py_ssize_t basicsize;
-#ifdef Py_LIMITED_API
-    PyObject *py_basicsize;
-#endif
-    py_module = __Pyx_ImportModule(module_name);
-    if (!py_module)
-        goto bad;
-    py_name = __Pyx_PyIdentifier_FromString(class_name);
-    if (!py_name)
-        goto bad;
-    result = PyObject_GetAttr(py_module, py_name);
-    Py_DECREF(py_name);
-    py_name = 0;
-    Py_DECREF(py_module);
-    py_module = 0;
-    if (!result)
-        goto bad;
-    if (!PyType_Check(result)) {
-        PyErr_Format(PyExc_TypeError,
-            "%.200s.%.200s is not a type object",
-            module_name, class_name);
-        goto bad;
-    }
-#ifndef Py_LIMITED_API
-    basicsize = ((PyTypeObject *)result)->tp_basicsize;
-#else
-    py_basicsize = PyObject_GetAttrString(result, "__basicsize__");
-    if (!py_basicsize)
-        goto bad;
-    basicsize = PyLong_AsSsize_t(py_basicsize);
-    Py_DECREF(py_basicsize);
-    py_basicsize = 0;
-    if (basicsize == (Py_ssize_t)-1 && PyErr_Occurred())
-        goto bad;
-#endif
-    if (!strict && (size_t)basicsize > size) {
-        PyOS_snprintf(warning, sizeof(warning),
-            "%s.%s size changed, may indicate binary incompatibility. Expected %zd, got %zd",
-            module_name, class_name, basicsize, size);
-        if (PyErr_WarnEx(NULL, warning, 0) < 0) goto bad;
-    }
-    else if ((size_t)basicsize != size) {
-        PyErr_Format(PyExc_ValueError,
-            "%.200s.%.200s has the wrong size, try recompiling. Expected %zd, got %zd",
-            module_name, class_name, basicsize, size);
-        goto bad;
-    }
-    return (PyTypeObject *)result;
-bad:
-    Py_XDECREF(py_module);
-    Py_XDECREF(result);
-    return NULL;
-}
-#endif
-
-/* InitStrings */
-        static int __Pyx_InitStrings(__Pyx_StringTabEntry *t) {
-    while (t->p) {
-        #if PY_MAJOR_VERSION < 3
-        if (t->is_unicode) {
-            *t->p = PyUnicode_DecodeUTF8(t->s, t->n - 1, NULL);
-        } else if (t->intern) {
-            *t->p = PyString_InternFromString(t->s);
-        } else {
-            *t->p = PyString_FromStringAndSize(t->s, t->n - 1);
-        }
-        #else
-        if (t->is_unicode | t->is_str) {
-            if (t->intern) {
-                *t->p = PyUnicode_InternFromString(t->s);
-            } else if (t->encoding) {
-                *t->p = PyUnicode_Decode(t->s, t->n - 1, t->encoding, NULL);
-            } else {
-                *t->p = PyUnicode_FromStringAndSize(t->s, t->n - 1);
-            }
-        } else {
-            *t->p = PyBytes_FromStringAndSize(t->s, t->n - 1);
-        }
-        #endif
-        if (!*t->p)
-            return -1;
-        if (PyObject_Hash(*t->p) == -1)
-            return -1;
-        ++t;
-    }
-    return 0;
-}
-
-static CYTHON_INLINE PyObject* __Pyx_PyUnicode_FromString(const char* c_str) {
-    return __Pyx_PyUnicode_FromStringAndSize(c_str, (Py_ssize_t)strlen(c_str));
-}
-static CYTHON_INLINE const char* __Pyx_PyObject_AsString(PyObject* o) {
-    Py_ssize_t ignore;
-    return __Pyx_PyObject_AsStringAndSize(o, &ignore);
-}
-#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII || __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT
-#if !CYTHON_PEP393_ENABLED
-static const char* __Pyx_PyUnicode_AsStringAndSize(PyObject* o, Py_ssize_t *length) {
-    char* defenc_c;
-    PyObject* defenc = _PyUnicode_AsDefaultEncodedString(o, NULL);
-    if (!defenc) return NULL;
-    defenc_c = PyBytes_AS_STRING(defenc);
-#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII
-    {
-        char* end = defenc_c + PyBytes_GET_SIZE(defenc);
-        char* c;
-        for (c = defenc_c; c < end; c++) {
-            if ((unsigned char) (*c) >= 128) {
-                PyUnicode_AsASCIIString(o);
-                return NULL;
-            }
-        }
-    }
-#endif
-    *length = PyBytes_GET_SIZE(defenc);
-    return defenc_c;
-}
-#else
-static CYTHON_INLINE const char* __Pyx_PyUnicode_AsStringAndSize(PyObject* o, Py_ssize_t *length) {
-    if (unlikely(__Pyx_PyUnicode_READY(o) == -1)) return NULL;
-#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII
-    if (likely(PyUnicode_IS_ASCII(o))) {
-        *length = PyUnicode_GET_LENGTH(o);
-        return PyUnicode_AsUTF8(o);
-    } else {
-        PyUnicode_AsASCIIString(o);
-        return NULL;
-    }
-#else
-    return PyUnicode_AsUTF8AndSize(o, length);
-#endif
-}
-#endif
-#endif
-static CYTHON_INLINE const char* __Pyx_PyObject_AsStringAndSize(PyObject* o, Py_ssize_t *length) {
-#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII || __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT
-    if (
-#if PY_MAJOR_VERSION < 3 && __PYX_DEFAULT_STRING_ENCODING_IS_ASCII
-            __Pyx_sys_getdefaultencoding_not_ascii &&
-#endif
-            PyUnicode_Check(o)) {
-        return __Pyx_PyUnicode_AsStringAndSize(o, length);
-    } else
-#endif
-#if (!CYTHON_COMPILING_IN_PYPY) || (defined(PyByteArray_AS_STRING) && defined(PyByteArray_GET_SIZE))
-    if (PyByteArray_Check(o)) {
-        *length = PyByteArray_GET_SIZE(o);
-        return PyByteArray_AS_STRING(o);
-    } else
-#endif
-    {
-        char* result;
-        int r = PyBytes_AsStringAndSize(o, &result, length);
-        if (unlikely(r < 0)) {
-            return NULL;
-        } else {
-            return result;
-        }
-    }
-}
-static CYTHON_INLINE int __Pyx_PyObject_IsTrue(PyObject* x) {
-   int is_true = x == Py_True;
-   if (is_true | (x == Py_False) | (x == Py_None)) return is_true;
-   else return PyObject_IsTrue(x);
-}
-static PyObject* __Pyx_PyNumber_IntOrLongWrongResultType(PyObject* result, const char* type_name) {
-#if PY_MAJOR_VERSION >= 3
-    if (PyLong_Check(result)) {
-        if (PyErr_WarnFormat(PyExc_DeprecationWarning, 1,
-                "__int__ returned non-int (type %.200s).  "
-                "The ability to return an instance of a strict subclass of int "
-                "is deprecated, and may be removed in a future version of Python.",
-                Py_TYPE(result)->tp_name)) {
-            Py_DECREF(result);
-            return NULL;
-        }
-        return result;
-    }
-#endif
-    PyErr_Format(PyExc_TypeError,
-                 "__%.4s__ returned non-%.4s (type %.200s)",
-                 type_name, type_name, Py_TYPE(result)->tp_name);
-    Py_DECREF(result);
-    return NULL;
-}
-static CYTHON_INLINE PyObject* __Pyx_PyNumber_IntOrLong(PyObject* x) {
-#if CYTHON_USE_TYPE_SLOTS
-  PyNumberMethods *m;
-#endif
-  const char *name = NULL;
-  PyObject *res = NULL;
-#if PY_MAJOR_VERSION < 3
-  if (likely(PyInt_Check(x) || PyLong_Check(x)))
-#else
-  if (likely(PyLong_Check(x)))
-#endif
-    return __Pyx_NewRef(x);
-#if CYTHON_USE_TYPE_SLOTS
-  m = Py_TYPE(x)->tp_as_number;
-  #if PY_MAJOR_VERSION < 3
-  if (m && m->nb_int) {
-    name = "int";
-    res = m->nb_int(x);
-  }
-  else if (m && m->nb_long) {
-    name = "long";
-    res = m->nb_long(x);
-  }
-  #else
-  if (likely(m && m->nb_int)) {
-    name = "int";
-    res = m->nb_int(x);
-  }
-  #endif
-#else
-  if (!PyBytes_CheckExact(x) && !PyUnicode_CheckExact(x)) {
-    res = PyNumber_Int(x);
-  }
-#endif
-  if (likely(res)) {
-#if PY_MAJOR_VERSION < 3
-    if (unlikely(!PyInt_Check(res) && !PyLong_Check(res))) {
-#else
-    if (unlikely(!PyLong_CheckExact(res))) {
-#endif
-        return __Pyx_PyNumber_IntOrLongWrongResultType(res, name);
-    }
-  }
-  else if (!PyErr_Occurred()) {
-    PyErr_SetString(PyExc_TypeError,
-                    "an integer is required");
-  }
-  return res;
-}
-static CYTHON_INLINE Py_ssize_t __Pyx_PyIndex_AsSsize_t(PyObject* b) {
-  Py_ssize_t ival;
-  PyObject *x;
-#if PY_MAJOR_VERSION < 3
-  if (likely(PyInt_CheckExact(b))) {
-    if (sizeof(Py_ssize_t) >= sizeof(long))
-        return PyInt_AS_LONG(b);
-    else
-        return PyInt_AsSsize_t(x);
-  }
-#endif
-  if (likely(PyLong_CheckExact(b))) {
-    #if CYTHON_USE_PYLONG_INTERNALS
-    const digit* digits = ((PyLongObject*)b)->ob_digit;
-    const Py_ssize_t size = Py_SIZE(b);
-    if (likely(__Pyx_sst_abs(size) <= 1)) {
-        ival = likely(size) ? digits[0] : 0;
-        if (size == -1) ival = -ival;
-        return ival;
-    } else {
-      switch (size) {
-         case 2:
-           if (8 * sizeof(Py_ssize_t) > 2 * PyLong_SHIFT) {
-             return (Py_ssize_t) (((((size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-         case -2:
-           if (8 * sizeof(Py_ssize_t) > 2 * PyLong_SHIFT) {
-             return -(Py_ssize_t) (((((size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-         case 3:
-           if (8 * sizeof(Py_ssize_t) > 3 * PyLong_SHIFT) {
-             return (Py_ssize_t) (((((((size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-         case -3:
-           if (8 * sizeof(Py_ssize_t) > 3 * PyLong_SHIFT) {
-             return -(Py_ssize_t) (((((((size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-         case 4:
-           if (8 * sizeof(Py_ssize_t) > 4 * PyLong_SHIFT) {
-             return (Py_ssize_t) (((((((((size_t)digits[3]) << PyLong_SHIFT) | (size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-         case -4:
-           if (8 * sizeof(Py_ssize_t) > 4 * PyLong_SHIFT) {
-             return -(Py_ssize_t) (((((((((size_t)digits[3]) << PyLong_SHIFT) | (size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
-           }
-           break;
-      }
-    }
-    #endif
-    return PyLong_AsSsize_t(b);
-  }
-  x = PyNumber_Index(b);
-  if (!x) return -1;
-  ival = PyInt_AsSsize_t(x);
-  Py_DECREF(x);
-  return ival;
-}
-static CYTHON_INLINE PyObject * __Pyx_PyBool_FromLong(long b) {
-  return b ? __Pyx_NewRef(Py_True) : __Pyx_NewRef(Py_False);
-}
-static CYTHON_INLINE PyObject * __Pyx_PyInt_FromSize_t(size_t ival) {
-    return PyInt_FromSize_t(ival);
-}
-
-
-#endif /* Py_PYTHON_H */

lakesuperior/store/ldp_rs/term.pxd

@@ -1,21 +0,0 @@
-cdef:
-    #unsigned char *pack_data
-    unsigned char term_type
-    unsigned char *pack_fmt
-    unsigned char *term_data
-    unsigned char *term_datatype
-    unsigned char *term_lang
-    #size_t pack_size
-
-    struct IdentifierTerm:
-        char type
-        unsigned char *data
-
-    struct LiteralTerm:
-        char type
-        unsigned char *data
-        unsigned char *datatype
-        unsigned char *lang
-
-    int serialize(term, unsigned char **pack_data, size_t *pack_size) except -1
-    deserialize(unsigned char *data, size_t size)

lakesuperior/store/ldp_rs/term.pyx

@@ -1,90 +0,0 @@
-from rdflib import URIRef, BNode, Literal
-
-#from cpython.mem cimport PyMem_Malloc, PyMem_Free
-from libc.stdlib cimport malloc, free
-#from libc.string cimport memcpy
-
-from lakesuperior.cy_include cimport cytpl as tpl
-
-DEF LSUP_TERM_TYPE_URIREF = 1
-DEF LSUP_TERM_TYPE_BNODE = 2
-DEF LSUP_TERM_TYPE_LITERAL = 3
-DEF LSUP_PK_FMT_ID = b'S(cs)'
-DEF LSUP_PK_FMT_LIT = b'S(csss)'
-
-
-cdef int serialize(
-        term, unsigned char **pack_data, size_t *pack_size) except -1:
-    cdef:
-        bytes term_data = term.encode()
-        bytes term_datatype
-        bytes term_lang
-        IdentifierTerm id_t
-        LiteralTerm lit_t
-
-    if isinstance(term, Literal):
-        term_datatype = (getattr(term, 'datatype') or '').encode()
-        term_lang = (getattr(term, 'language') or '').encode()
-
-        lit_t.type = LSUP_TERM_TYPE_LITERAL
-        lit_t.data = term_data
-        lit_t.datatype = <unsigned char *>term_datatype
-        lit_t.lang = <unsigned char *>term_lang
-
-        tpl.tpl_jot(tpl.TPL_MEM, pack_data, pack_size, LSUP_PK_FMT_LIT, &lit_t)
-    else:
-        if isinstance(term, URIRef):
-            id_t.type = LSUP_TERM_TYPE_URIREF
-        elif isinstance(term, BNode):
-            id_t.type = LSUP_TERM_TYPE_BNODE
-        else:
-            raise ValueError(f'Unsupported term type: {type(term)}')
-        id_t.data = term_data
-        tpl.tpl_jot(tpl.TPL_MEM, pack_data, pack_size, LSUP_PK_FMT_ID, &id_t)
-
-
-cdef deserialize(const unsigned char *data, const size_t data_size):
-    cdef:
-        char term_type
-        char *fmt = NULL
-        char *_pk = NULL
-        unsigned char *term_data = NULL
-        unsigned char *term_lang = NULL
-        unsigned char *term_datatype = NULL
-
-    datatype = None
-    lang = None
-
-    fmt = tpl.tpl_peek(tpl.TPL_MEM, data, data_size)
-    try:
-        if fmt == LSUP_PK_FMT_LIT:
-            _pk = tpl.tpl_peek(
-                    tpl.TPL_MEM | tpl.TPL_DATAPEEK, data, data_size, b'csss',
-                    &term_type, &term_data, &term_datatype, &term_lang)
-            if len(term_datatype) > 0:
-                datatype = term_datatype.decode()
-            elif len(term_lang) > 0:
-                lang = term_lang.decode()
-
-            return Literal(term_data.decode(), datatype=datatype, lang=lang)
-
-        elif fmt == LSUP_PK_FMT_ID:
-            _pk = tpl.tpl_peek(
-                    tpl.TPL_MEM | tpl.TPL_DATAPEEK, data, data_size, b'cs',
-                    &term_type, &term_data)
-            uri = term_data.decode()
-            if term_type == LSUP_TERM_TYPE_URIREF:
-                return URIRef(uri)
-            elif term_type == LSUP_TERM_TYPE_BNODE:
-                return BNode(uri)
-            else:
-                raise IOError(f'Unknown term type code: {term_type}')
-        else:
-            msg = f'Unknown structure pack format: {fmt}'
-            raise IOError(msg)
-    finally:
-        free(term_data)
-        free(term_datatype)
-        free(term_lang)
-        free(_pk)
-        free(fmt)

lakesuperior/toolbox.py

@@ -194,6 +194,19 @@ class Toolbox:
         return s, p, o
 
 
+    def globalize_imr(self, imr):
+        '''
+        Globalize an Imr.
+
+        :rtype: rdflib.Graph
+        '''
+        g_gr = Graph(identifier=self.globalize_term(imr.uri))
+        for trp in imr:
+            g_gr.add(self.globalize_triple(trp))
+
+        return g_gr
+
+
     def globalize_graph(self, gr):
         '''
         Globalize a graph.

lakesuperior/util/benchmark.py

@@ -1,32 +1,52 @@
 #!/usr/bin/env python3
 
+import logging
 import sys
 
+from os import path
 from uuid import uuid4
 
 import arrow
 import click
+import rdflib
 import requests
 
 from matplotlib import pyplot as plt
 
 from lakesuperior.util.generators import (
         random_image, random_graph, random_utf8_string)
+from lakesuperior.exceptions import ResourceNotExistsError
 
 __doc__ = '''
 Benchmark script to measure write performance.
 '''
 
+def_mode = 'ldp'
 def_endpoint = 'http://localhost:8000/ldp'
 def_ct = 10000
 def_parent = '/pomegranate'
 def_gr_size = 200
 
+logging.disable(logging.WARN)
+
 
 @click.command()
+@click.option(
+    '--mode', '-m', default=def_mode,
+    help=(
+        'Mode of ingestion. One of `ldp`, `python`. With the former, the '
+        'HTTP/LDP web server is used. With the latter, the Python API is '
+        'used, in which case the server need not be running. '
+        f'Default: {def_endpoint}'
+    )
+)
 @click.option(
     '--endpoint', '-e', default=def_endpoint,
-    help=f'LDP endpoint. Default: {def_endpoint}')
+    help=(
+        'LDP endpoint. Only meaningful with `ldp` mode. '
+        f'Default: {def_endpoint}'
+    )
+)
 @click.option(
     '--count', '-c', default=def_ct,
     help='Number of resources to ingest. Default: {def_ct}')
@@ -40,9 +60,12 @@ def_gr_size = 200
     help='Delete container resource and its children if already existing. By '
     'default, the container is not deleted and new resources are added to it.')
 @click.option(
-    '--method', '-m', default='put',
-    help='HTTP method to use. Case insensitive. Either PUT '
-    f'or POST. Default: PUT')
+    '--method', '-X', default='put',
+    help=(
+        'HTTP method to use. Case insensitive. Either PUT or POST. '
+        'Default: PUT'
+    )
+)
 @click.option(
     '--graph-size', '-s', default=def_gr_size,
     help=f'Number of triples in each graph. Default: {def_gr_size}')
@@ -52,47 +75,78 @@ def_gr_size = 200
     '`n` (only  LDP-NR, i.e. binaries), or `b` (50/50% of both). '
     'Default: r')
 @click.option(
-    '--graph', '-g', is_flag=True, help='Plot a graph of ingest timings. '
+    '--plot', '-P', is_flag=True, help='Plot a graph of ingest timings. '
     'The graph figure is displayed on screen with basic manipulation and save '
     'options.')
 
 def run(
-        endpoint, count, parent, method, delete_container,
-        graph_size, resource_type, graph):
-
-    container_uri = endpoint + parent
+    mode, endpoint, count, parent, method, delete_container,
+    graph_size, resource_type, plot
+):
+    """
+    Run the benchmark.
+    """
 
     method = method.lower()
     if method not in ('post', 'put'):
-        raise ValueError(f'HTTP method not supported: {method}')
+        raise ValueError(f'Insertion method not supported: {method}')
+
+    mode = mode.lower()
+    if mode == 'ldp':
+        parent = '{}/{}'.format(endpoint.strip('/'), parent.strip('/'))
+
+        if delete_container:
+            print('Removing previously existing container.')
+            requests.delete(parent, headers={'prefer': 'no-tombstone'})
+        requests.put(parent)
 
-    if delete_container:
-        requests.delete(container_uri, headers={'prefer': 'no-tombstone'})
-    requests.put(container_uri)
+    elif mode == 'python':
+        from lakesuperior import env_setup
+        from lakesuperior.api import resource as rsrc_api
+
+        if delete_container:
+            try:
+                print('Removing previously existing container.')
+                rsrc_api.delete(parent, soft=False)
+            except ResourceNotExistsError:
+                pass
+        rsrc_api.create_or_replace(parent)
+    else:
+        raise ValueError(f'Mode not supported: {mode}')
 
-    print(f'Inserting {count} children under {container_uri}.')
 
     # URI used to establish an in-repo relationship. This is set to
     # the most recently created resource in each loop.
-    ref = container_uri
+    ref = parent
+
+    print(f'Inserting {count} children under {parent}.')
 
     wclock_start = arrow.utcnow()
-    if graph:
+    if plot:
         print('Results will be plotted.')
         # Plot coordinates: X is request count, Y is request timing.
         px = []
         py = []
         plt.xlabel('Requests')
         plt.ylabel('ms per request')
-        plt.title('FCREPO Benchmark')
+        plt.title('Lakesuperior / FCREPO Benchmark')
 
     try:
         for i in range(1, count + 1):
-            url = '{}/{}'.format(container_uri, uuid4()) if method == 'put' \
-                    else container_uri
+            #import pdb; pdb.set_trace()
+            if mode == 'ldp':
+                dest = (
+                    f'{parent}/{uuid4()}' if method == 'put'
+                    else parent
+                )
+            else:
+                dest = (
+                    path.join(parent, str(uuid4()))
+                    if method == 'put' else parent
+                )
 
             if resource_type == 'r' or (resource_type == 'b' and i % 2 == 0):
-                data = random_graph(graph_size, ref).serialize(format='ttl')
+                data = random_graph(graph_size, ref)
                 headers = {'content-type': 'text/turtle'}
             else:
                 img = random_image(name=uuid4(), ts=16, ims=512)
@@ -103,19 +157,21 @@ def run(
                         'content-disposition': 'attachment; filename="{}"'
                             .format(uuid4())}
 
-            #import pdb; pdb.set_trace()
             # Start timing after generating the data.
             ckpt = arrow.utcnow()
             if i == 1:
                 tcounter = ckpt - ckpt
                 prev_tcounter = tcounter
 
-            rsp = requests.request(method, url, data=data, headers=headers)
-            tdelta = arrow.utcnow() - ckpt
-            tcounter += tdelta
+            ref = (
+                _ingest_graph_ldp(
+                    method, dest, data.serialize(format='ttl'), headers, ref
+                )
+                if mode == 'ldp'
+                else _ingest_graph_py(method, dest, data, ref)
+            )
+            tcounter += (arrow.utcnow() - ckpt)
 
-            rsp.raise_for_status()
-            ref = rsp.headers['location']
             if i % 10 == 0:
                 avg10 = (tcounter - prev_tcounter) / 10
                 print(
@@ -123,7 +179,7 @@ def run(
                     f'Per resource: {avg10}')
                 prev_tcounter = tcounter
 
-                if graph:
+                if plot:
                     px.append(i)
                     # Divide by 1000 for µs → ms
                     py.append(avg10.microseconds // 1000)
@@ -136,7 +192,7 @@ def run(
     print(f'Total time spent ingesting resources: {tcounter}')
     print(f'Average time per resource: {tcounter.total_seconds()/i}')
 
-    if graph:
+    if plot:
         if resource_type == 'r':
             type_label = 'LDP-RS'
         elif resource_type == 'n':
@@ -144,12 +200,39 @@ def run(
         else:
             type_label = 'LDP-RS + LDP-NR'
         label = (
-            f'{container_uri}; {method.upper()}; {graph_size} trp/graph; '
+            f'{parent}; {method.upper()}; {graph_size} trp/graph; '
             f'{type_label}')
         plt.plot(px, py, label=label)
         plt.legend()
         plt.show()
 
 
+def _ingest_graph_ldp(method, uri, data, headers, ref):
+    """
+    Ingest the graph via HTTP/LDP.
+    """
+    rsp = requests.request(method, uri, data=data, headers=headers)
+    rsp.raise_for_status()
+    return rsp.headers['location']
+
+
+def _ingest_graph_py(method, dest, data, ref):
+    from lakesuperior.api import resource as rsrc_api
+
+    kwargs = {}
+    if isinstance(data, rdflib.Graph):
+        kwargs['graph'] = data
+    else:
+        kwargs['stream'] = data
+        kwargs['mimetype'] = 'image/png'
+
+    if method == 'put':
+        _, rsrc = rsrc_api.create_or_replace(dest, **kwargs)
+    else:
+        _, rsrc = rsrc_api.create(dest, **kwargs)
+
+    return rsrc.uid
+
+
 if __name__ == '__main__':
     run()

lakesuperior/wsgi/__init__.py

@@ -49,9 +49,9 @@ class __Defaults:
 
     listen_addr = '0.0.0.0'
     listen_port = 8000
-    preload_app = True
+    preload_app = False
     app_mode = 'prod'
-    worker_class = 'gevent'
+    worker_class = 'sync'
     max_requests = 0
 
     def __init__(self):

pytest.ini

@@ -2,7 +2,7 @@
 log_format = %(asctime)s %(levelname)s %(message)s
 log_date_format = %Y-%m-%d %H:%M:%S
 log_cli = true
-log_cli_level = DEBUG
+log_cli_level = INFO
 
 log_file = tests/pytest.log
-log_file_level = DEBUG
+log_file_level = INFO

requirements_dev.txt

@@ -1,5 +1,5 @@
 CoilMQ>=1.0.1
-Cython==0.28.4
+Cython==0.29.6
 Flask>=0.12.2
 HiYaPyCo>=0.4.11
 Pillow>=4.3.0
@@ -9,6 +9,7 @@ click-log>=0.2.1
 click>=6.7
 gevent>=1.3.6
 gunicorn>=19.7.1
+matplotlib
 numpy>=1.15.1
 pytest-flask
 pytest>=3.2.2

requirements_rtd.txt

@@ -1,4 +1,5 @@
 CoilMQ>=1.0.1
+Cython==0.29
 Flask>=0.12.2
 HiYaPyCo>=0.4.11
 PyYAML>=3.13

sandbox/NOTES

@@ -0,0 +1,15 @@
+Uses for a graph:
+
+1. Create a graph from RDF input, manipulate or evaluate it, and output it as
+  serialized RDF (always detached) [NO USE CASE]
+2. Create a graph from RDF input, optionally manipulate it with other data from
+  the store or external RDF and store it (start detached, then convert keys;
+  or, start attached)
+3. Retrieve a graph from the store, optionally manipulate it, and output it as
+  serialized RDF (start attached, then detach)
+4. Retrieve a graph from the store, manipulate it, and put the changed graph
+  back in the store (always attached)
+
+Initially we might try to render the graph read-only when detached; this
+avoids implementing more complex operations such as add, remove and booleans.
+

sandbox/txn_openLogic.txt

@@ -0,0 +1,10 @@
+txn_open    write       txn_rw      Open?
+n           -           -           y
+y           n           -           n
+y           y           y           n
+y           y           n           y
+
+txn_open    Open    Reset?
+n           y       n
+y           y       y
+

setup.py

@@ -15,14 +15,27 @@ from os import path
 
 import lakesuperior
 
+# Use this version to build C files from .pyx sources.
+CYTHON_VERSION='0.29.6'
+
+KLEN = 5 # TODO Move somewhere else (config?)
+
 try:
+    import Cython
     from Cython.Build import cythonize
 except ImportError:
     USE_CYTHON = False
-    print('Not using Cython to compile extensions.')
 else:
-    USE_CYTHON = True
-    print('Using Cython to compile extensions.')
+    cy_installed_version = Cython.__version__
+    if cy_installed_version == CYTHON_VERSION:
+        USE_CYTHON = True
+    else:
+        raise ImportError(
+            f'The installed Cython version ({cy_installed_version}) '
+            f'does not match the required version ({CYTHON_VERSION}). '
+            'Please insstall the exact required Cython version in order to '
+            'generate the C sources.'
+        )
 
 
 # ``pytest_runner`` is referenced in ``setup_requires``.
@@ -37,71 +50,151 @@ with open(readme_fpath, encoding='utf-8') as f:
     long_description = f.read()
 
 # Extensions directory.
-#ext_dir = path.join(path.dirname(lakesuperior.basedir), 'ext')
-ext_dir = 'ext'
+coll_src_dir = path.join('ext', 'collections-c', 'src')
+lmdb_src_dir = path.join('ext', 'lmdb', 'libraries', 'liblmdb')
+spookyhash_src_dir = path.join('ext', 'spookyhash', 'src')
+tpl_src_dir = path.join('ext', 'tpl', 'src')
 
 include_dirs = [
-    path.join(ext_dir, 'include'),
+    path.join(coll_src_dir, 'include'),
+    lmdb_src_dir,
+    spookyhash_src_dir,
+    tpl_src_dir,
 ]
+
+cy_include_dir = path.join('lakesuperior', 'cy_include')
+
+
 if USE_CYTHON:
-    include_dirs.append(path.join(lakesuperior.basedir, 'cy_include'))
+    print(f'Using Cython {CYTHON_VERSION} to generate C extensions.')
+    include_dirs.append(cy_include_dir)
     ext = 'pyx'
+    pxdext = 'pxd'
 else:
-    ext = 'c'
+    print(f'Cython {CYTHON_VERSION} not found. Using provided C extensions.')
+    ext = pxdext = 'c'
 
 extensions = [
+    Extension(
+        'lakesuperior.model.base',
+        [
+            path.join(tpl_src_dir, 'tpl.c'),
+            path.join('lakesuperior', 'model', f'base.{ext}'),
+        ],
+        include_dirs=include_dirs,
+        extra_compile_args=['-fopenmp', '-g'],
+        extra_link_args=['-fopenmp', '-g']
+    ),
+    Extension(
+        'lakesuperior.model.callbacks',
+        [
+            path.join('lakesuperior', 'model', f'callbacks.{ext}'),
+        ],
+        include_dirs=include_dirs,
+        extra_compile_args=['-g'],
+        extra_link_args=['-g'],
+        #extra_compile_args=['-fopenmp'],
+        #extra_link_args=['-fopenmp']
+    ),
+    Extension(
+        'lakesuperior.model.structures.*',
+        [
+            path.join(spookyhash_src_dir, 'spookyhash.c'),
+            path.join(coll_src_dir, 'common.c'),
+            path.join(coll_src_dir, 'array.c'),
+            path.join(coll_src_dir, 'hashtable.c'),
+            path.join(coll_src_dir, 'hashset.c'),
+            path.join('lakesuperior', 'model', 'structures', f'*.{ext}'),
+        ],
+        include_dirs=include_dirs,
+        extra_compile_args=['-fopenmp', '-g'],
+        extra_link_args=['-fopenmp', '-g']
+    ),
     Extension(
         'lakesuperior.store.base_lmdb_store',
         [
-            path.join(ext_dir, 'lib', 'mdb.c'),
-            path.join(ext_dir, 'lib', 'midl.c'),
+            path.join(coll_src_dir, 'common.c'),
+            path.join(coll_src_dir, 'array.c'),
+            path.join(coll_src_dir, 'hashtable.c'),
+            path.join(coll_src_dir, 'hashset.c'),
+            path.join(tpl_src_dir, 'tpl.c'),
+            path.join(lmdb_src_dir, 'mdb.c'),
+            path.join(lmdb_src_dir, 'midl.c'),
             path.join('lakesuperior', 'store', f'base_lmdb_store.{ext}'),
         ],
         include_dirs=include_dirs,
+        extra_compile_args=['-g'],
+        extra_link_args=['-g'],
     ),
     Extension(
-        'lakesuperior.store.ldp_rs.term',
+        'lakesuperior.model.rdf.*',
         [
-            path.join(ext_dir, 'lib', 'tpl.c'),
-            path.join('lakesuperior', 'store', 'ldp_rs', f'term.{ext}'),
+            path.join(tpl_src_dir, 'tpl.c'),
+            path.join(spookyhash_src_dir, 'context.c'),
+            path.join(spookyhash_src_dir, 'globals.c'),
+            path.join(spookyhash_src_dir, 'spookyhash.c'),
+            path.join(coll_src_dir, 'common.c'),
+            path.join(coll_src_dir, 'array.c'),
+            path.join(coll_src_dir, 'hashtable.c'),
+            path.join(coll_src_dir, 'hashset.c'),
+            path.join('lakesuperior', 'model', 'rdf', f'*.{ext}'),
         ],
         include_dirs=include_dirs,
-        extra_compile_args=['-fopenmp'],
-        extra_link_args=['-fopenmp'],
-        libraries=['crypto']
+        #extra_compile_args=['-fopenmp'],
+        #extra_link_args=['-fopenmp']
     ),
     Extension(
         'lakesuperior.store.ldp_rs.lmdb_triplestore',
         [
-            path.join(ext_dir, 'lib', 'mdb.c'),
-            path.join(ext_dir, 'lib', 'midl.c'),
+            path.join(coll_src_dir, 'common.c'),
+            path.join(coll_src_dir, 'array.c'),
+            path.join(coll_src_dir, 'hashtable.c'),
+            path.join(coll_src_dir, 'hashset.c'),
+            path.join(lmdb_src_dir, 'mdb.c'),
+            path.join(lmdb_src_dir, 'midl.c'),
             path.join(
                 'lakesuperior', 'store', 'ldp_rs', f'lmdb_triplestore.{ext}'),
         ],
         include_dirs=include_dirs,
-        extra_compile_args=['-fopenmp'],
-        extra_link_args=['-fopenmp'],
-        libraries=['crypto']
+        extra_compile_args=['-g', '-fopenmp'],
+        extra_link_args=['-g', '-fopenmp']
     ),
-    # For testing.
-    #Extension(
-    #    '*',
-    #    [
-    #        #path.join(ext_dir, 'lib', 'tpl.c'),
-    #        path.join(
-    #            path.dirname(lakesuperior.basedir), 'sandbox', f'*.{ext}'),
-    #    ],
-    #    include_dirs=include_dirs,
-    #),
+]
+
+# Great reference read about dependency management:
+# https://caremad.io/posts/2013/07/setup-vs-requirement/
+install_requires = [
+    'CoilMQ',
+    'Flask',
+    'HiYaPyCo',
+    'PyYAML',
+    'arrow',
+    'click',
+    'click-log',
+    'cymem',
+    'gevent',
+    'gunicorn',
+    'rdflib',
+    'rdflib-jsonld',
+    'requests',
+    'requests-toolbelt',
+    'sphinx-rtd-theme',
+    'stomp.py',
 ]
 
 if USE_CYTHON:
-    extensions = cythonize(extensions, compiler_directives={
-        'language_level': 3,
-        'boundscheck': False,
-        'wraparound': False,
-        'profile': True,
-    })
+    extensions = cythonize(
+        extensions,
+        include_path=include_dirs,
+        annotate=True,
+        compiler_directives={
+            'language_level': 3,
+            'boundscheck': False,
+            'wraparound': False,
+            'profile': True,
+            'embedsignature': True
+        }
+    )
 
 
 setup(
@@ -153,26 +246,7 @@ setup(
 
     packages=find_packages(exclude=['contrib', 'docs', 'tests']),
 
-    # Great reference read about dependency management:
-    # https://caremad.io/posts/2013/07/setup-vs-requirement/
-    install_requires=[
-        'CoilMQ',
-        'Flask',
-        'HiYaPyCo',
-        'PyYAML',
-        'arrow',
-        'cchardet',
-        'click',
-        'click-log',
-        'gevent',
-        'gunicorn',
-        'rdflib',
-        'rdflib-jsonld',
-        'requests',
-        'requests-toolbelt',
-        'sphinx-rtd-theme',
-        'stomp.py',
-    ],
+    install_requires=install_requires,
 
     setup_requires=[
         'setuptools>=18.0',
@@ -199,6 +273,8 @@ setup(
         ],
     },
 
+    scripts=['bin/fcrepo'],
+
     project_urls={
         'Source Code': 'https://github.com/scossu/lakesuperior/',
         'Documentation': 'https://lakesuperior.readthedocs.io',

tests/0_data_structures/test_0_0_graph.py

@@ -0,0 +1,850 @@
+import pdb
+import pytest
+
+from shutil import rmtree
+
+from rdflib import Graph, Namespace, URIRef
+
+from lakesuperior.model.rdf.graph import Graph
+from lakesuperior.store.ldp_rs.lmdb_store import LmdbStore
+
+
+@pytest.fixture(scope='class')
+def store():
+    """
+    Test LMDB store.
+
+    This store has a different life cycle than the one used for tests in higher
+    levels of the stack and is not bootstrapped (i.e. starts completely empty).
+    """
+    env_path = '/tmp/test_lmdbstore'
+    # Remove previous test DBs
+    rmtree(env_path, ignore_errors=True)
+    store = LmdbStore(env_path)
+    yield store
+    store.close()
+    store.destroy()
+
+
+@pytest.fixture(scope='class')
+def trp():
+    return (
+        (URIRef('urn:s:0'), URIRef('urn:p:0'), URIRef('urn:o:0')),
+        # Exact same as [0].
+        (URIRef('urn:s:0'), URIRef('urn:p:0'), URIRef('urn:o:0')),
+        # NOTE: s and o are in reversed order.
+        (URIRef('urn:o:0'), URIRef('urn:p:0'), URIRef('urn:s:0')),
+        (URIRef('urn:s:0'), URIRef('urn:p:1'), URIRef('urn:o:0')),
+        (URIRef('urn:s:0'), URIRef('urn:p:1'), URIRef('urn:o:1')),
+        (URIRef('urn:s:1'), URIRef('urn:p:1'), URIRef('urn:o:1')),
+        (URIRef('urn:s:1'), URIRef('urn:p:2'), URIRef('urn:o:2')),
+    )
+
+@pytest.mark.usefixtures('trp')
+@pytest.mark.usefixtures('store')
+class TestGraphInit:
+    """
+    Test initialization of graphs with different base data sets.
+    """
+    def test_empty(self, store):
+        """
+        Test creation of an empty graph.
+        """
+        # No transaction needed to init an empty graph.
+        gr = Graph(store)
+
+        # len() should not need a DB transaction open.
+        assert len(gr) == 0
+
+
+    def test_init_triples(self, trp, store):
+        """
+        Test creation using a Python set.
+        """
+        with store.txn_ctx():
+            gr = Graph(store, data=set(trp))
+
+            assert len(gr) == 6
+
+            for t in trp:
+                assert t in gr
+
+
+@pytest.mark.usefixtures('trp')
+@pytest.mark.usefixtures('store')
+class TestGraphLookup:
+    """
+    Test triple lookup.
+    """
+
+    def test_lookup_all_unbound(self, trp, store):
+        """
+        Test lookup ? ? ? (all unbound)
+        """
+        with store.txn_ctx():
+            gr = Graph(store, data=set(trp))
+
+            flt_gr = gr.lookup((None, None, None))
+
+            assert len(flt_gr) == 6
+
+            assert trp[0] in flt_gr
+            assert trp[2] in flt_gr
+            assert trp[3] in flt_gr
+            assert trp[4] in flt_gr
+            assert trp[5] in flt_gr
+            assert trp[6] in flt_gr
+
+
+    def test_lookup_s(self, trp, store):
+        """
+        Test lookup s ? ?
+        """
+        with store.txn_ctx():
+            gr = Graph(store, data=set(trp))
+
+            flt_gr = gr.lookup((URIRef('urn:s:0'), None, None))
+
+            assert len(flt_gr) == 3
+
+            assert trp[0] in flt_gr
+            assert trp[3] in flt_gr
+            assert trp[4] in flt_gr
+
+            assert trp[2] not in flt_gr
+            assert trp[5] not in flt_gr
+            assert trp[6] not in flt_gr
+
+            # Test for empty results.
+            empty_flt_gr = gr.lookup((URIRef('urn:s:8'), None, None))
+
+            assert len(empty_flt_gr) == 0
+
+
+    def test_lookup_p(self, trp, store):
+        """
+        Test lookup ? p ?
+        """
+        with store.txn_ctx():
+            gr = Graph(store, data=set(trp))
+
+            flt_gr = gr.lookup((None, URIRef('urn:p:0'), None))
+
+            assert len(flt_gr) == 2
+
+            assert trp[0] in flt_gr
+            assert trp[2] in flt_gr
+
+            assert trp[3] not in flt_gr
+            assert trp[4] not in flt_gr
+            assert trp[5] not in flt_gr
+            assert trp[6] not in flt_gr
+
+            # Test for empty results.
+            empty_flt_gr = gr.lookup((None, URIRef('urn:p:8'), None))
+
+            assert len(empty_flt_gr) == 0
+
+
+    def test_lookup_o(self, trp, store):
+        """
+        Test lookup ? ? o
+        """
+        with store.txn_ctx():
+            gr = Graph(store, data=set(trp))
+
+            flt_gr = gr.lookup((None, None, URIRef('urn:o:1')))
+
+            assert len(flt_gr) == 2
+
+            assert trp[4] in flt_gr
+            assert trp[5] in flt_gr
+
+            assert trp[0] not in flt_gr
+            assert trp[2] not in flt_gr
+            assert trp[3] not in flt_gr
+            assert trp[6] not in flt_gr
+
+            # Test for empty results.
+            empty_flt_gr = gr.lookup((None, None, URIRef('urn:o:8')))
+
+            assert len(empty_flt_gr) == 0
+
+
+    def test_lookup_sp(self, trp, store):
+        """
+        Test lookup s p ?
+        """
+        with store.txn_ctx():
+            gr = Graph(store, data=set(trp))
+
+            flt_gr = gr.lookup((URIRef('urn:s:0'), URIRef('urn:p:1'), None))
+
+            assert len(flt_gr) == 2
+
+            assert trp[3] in flt_gr
+            assert trp[4] in flt_gr
+
+            assert trp[0] not in flt_gr
+            assert trp[2] not in flt_gr
+            assert trp[5] not in flt_gr
+            assert trp[6] not in flt_gr
+
+            # Test for empty results.
+            empty_flt_gr = gr.lookup((URIRef('urn:s:0'), URIRef('urn:p:2'), None))
+
+            assert len(empty_flt_gr) == 0
+
+
+    def test_lookup_so(self, trp, store):
+        """
+        Test lookup s ? o
+        """
+        with store.txn_ctx():
+            gr = Graph(store, data=set(trp))
+
+            flt_gr = gr.lookup((URIRef('urn:s:0'), None, URIRef('urn:o:0')))
+
+            assert len(flt_gr) == 2
+
+            assert trp[0] in flt_gr
+            assert trp[3] in flt_gr
+
+            assert trp[2] not in flt_gr
+            assert trp[4] not in flt_gr
+            assert trp[5] not in flt_gr
+            assert trp[6] not in flt_gr
+
+            # Test for empty results.
+            empty_flt_gr = gr.lookup((URIRef('urn:s:0'), None, URIRef('urn:o:2')))
+
+            assert len(empty_flt_gr) == 0
+
+
+    def test_lookup_po(self, trp, store):
+        """
+        Test lookup ? p o
+        """
+        with store.txn_ctx():
+            gr = Graph(store, data=set(trp))
+
+            flt_gr = gr.lookup((None, URIRef('urn:p:1'), URIRef('urn:o:1')))
+
+            assert len(flt_gr) == 2
+
+            assert trp[4] in flt_gr
+            assert trp[5] in flt_gr
+
+            assert trp[0] not in flt_gr
+            assert trp[2] not in flt_gr
+            assert trp[3] not in flt_gr
+            assert trp[6] not in flt_gr
+
+            # Test for empty results.
+            empty_flt_gr = gr.lookup((None, URIRef('urn:p:1'), URIRef('urn:o:2')))
+
+            assert len(empty_flt_gr) == 0
+
+
+    def test_lookup_spo(self, trp, store):
+        """
+        Test lookup s p o
+        """
+        with store.txn_ctx():
+            gr = Graph(store, data=set(trp))
+
+            flt_gr = gr.lookup(
+                (URIRef('urn:s:1'), URIRef('urn:p:1'), URIRef('urn:o:1'))
+            )
+
+            assert len(flt_gr) == 1
+
+            assert trp[5] in flt_gr
+
+            assert trp[0] not in flt_gr
+            assert trp[2] not in flt_gr
+            assert trp[3] not in flt_gr
+            assert trp[4] not in flt_gr
+            assert trp[6] not in flt_gr
+
+            # Test for empty results.
+            empty_flt_gr = gr.lookup(
+                (URIRef('urn:s:1'), URIRef('urn:p:1'), URIRef('urn:o:2'))
+            )
+
+            assert len(empty_flt_gr) == 0
+
+
+@pytest.mark.usefixtures('trp')
+@pytest.mark.usefixtures('store')
+class TestGraphSlicing:
+    """
+    Test triple lookup.
+    """
+    # TODO
+    pass
+
+
+
+@pytest.mark.usefixtures('trp')
+@pytest.mark.usefixtures('store')
+class TestGraphOps:
+    """
+    Test various graph operations.
+    """
+    def test_len(self, trp, store):
+        """
+        Test the length of a graph with and without duplicates.
+        """
+        with store.txn_ctx():
+            gr = Graph(store)
+            assert len(gr) == 0
+
+            gr.add((trp[0],))
+            assert len(gr) == 1
+
+            gr.add((trp[1],)) # Same values
+            assert len(gr) == 1
+
+            gr.add((trp[2],))
+            assert len(gr) == 2
+
+            gr.add(trp)
+            assert len(gr) == 6
+
+
+    def test_dup(self, trp, store):
+        """
+        Test operations with duplicate triples.
+        """
+        with store.txn_ctx():
+            gr = Graph(store)
+
+            gr.add((trp[0],))
+            assert trp[1] in gr
+            assert trp[2] not in gr
+
+
+    def test_remove(self, trp, store):
+        """
+        Test adding and removing triples.
+        """
+        with store.txn_ctx():
+            gr = Graph(store)
+
+            gr.add(trp)
+            gr.remove(trp[0])
+            assert len(gr) == 5
+            assert trp[0] not in gr
+            assert trp[1] not in gr
+
+            # This is the duplicate triple.
+            gr.remove(trp[1])
+            assert len(gr) == 5
+
+            # This is the triple in reverse order.
+            gr.remove(trp[2])
+            assert len(gr) == 4
+
+            gr.remove(trp[4])
+            assert len(gr) == 3
+
+
+    def test_union(self, trp, store):
+        """
+        Test graph union.
+        """
+        with store.txn_ctx():
+            gr1 = Graph(store, data={*trp[:3]})
+            gr2 = Graph(store, data={*trp[2:6]})
+
+            gr3 = gr1 | gr2
+
+            assert len(gr3) == 5
+            assert trp[0] in gr3
+            assert trp[4] in gr3
+
+
+    def test_ip_union(self, trp, store):
+        """
+        Test graph in-place union.
+        """
+        with store.txn_ctx():
+            gr1 = Graph(store, data={*trp[:3]})
+            gr2 = Graph(store, data={*trp[2:6]})
+
+            gr1 |= gr2
+
+            assert len(gr1) == 5
+            assert trp[0] in gr1
+            assert trp[4] in gr1
+
+
+    def test_addition(self, trp, store):
+        """
+        Test graph addition.
+        """
+        with store.txn_ctx():
+            gr1 = Graph(store, data={*trp[:3]})
+            gr2 = Graph(store, data={*trp[2:6]})
+
+            gr3 = gr1 + gr2
+
+            assert len(gr3) == 5
+            assert trp[0] in gr3
+            assert trp[4] in gr3
+
+
+    def test_ip_addition(self, trp, store):
+        """
+        Test graph in-place addition.
+        """
+        with store.txn_ctx():
+            gr1 = Graph(store, data={*trp[:3]})
+            gr2 = Graph(store, data={*trp[2:6]})
+
+            gr1 += gr2
+
+            assert len(gr1) == 5
+            assert trp[0] in gr1
+            assert trp[4] in gr1
+
+
+    def test_subtraction(self, trp, store):
+        """
+        Test graph addition.
+        """
+        with store.txn_ctx():
+            gr1 = Graph(store, data={*trp[:4]})
+            gr2 = Graph(store, data={*trp[2:6]})
+
+            gr3 = gr1 - gr2
+
+            assert len(gr3) == 1
+            assert trp[0] in gr3
+            assert trp[1] in gr3
+            assert trp[2] not in gr3
+            assert trp[3] not in gr3
+            assert trp[4] not in gr3
+
+            gr3 = gr2 - gr1
+
+            assert len(gr3) == 2
+            assert trp[0] not in gr3
+            assert trp[1] not in gr3
+            assert trp[2] not in gr3
+            assert trp[3] not in gr3
+            assert trp[4] in gr3
+            assert trp[5] in gr3
+
+
+    def test_ip_subtraction(self, trp, store):
+        """
+        Test graph in-place addition.
+        """
+        with store.txn_ctx():
+            gr1 = Graph(store, data={*trp[:4]})
+            gr2 = Graph(store, data={*trp[2:6]})
+
+            gr1 -= gr2
+
+            assert len(gr1) == 1
+            assert trp[0] in gr1
+            assert trp[1] in gr1
+            assert trp[2] not in gr1
+            assert trp[3] not in gr1
+            assert trp[4] not in gr1
+
+
+
+    def test_intersect(self, trp, store):
+        """
+        Test graph intersextion.
+        """
+        with store.txn_ctx():
+            gr1 = Graph(store, data={*trp[:4]})
+            gr2 = Graph(store, data={*trp[2:6]})
+
+            gr3 = gr1 & gr2
+
+            assert len(gr3) == 2
+            assert trp[2] in gr3
+            assert trp[3] in gr3
+            assert trp[0] not in gr3
+            assert trp[5] not in gr3
+
+
+    def test_ip_intersect(self, trp, store):
+        """
+        Test graph intersextion.
+        """
+        with store.txn_ctx():
+            gr1 = Graph(store, data={*trp[:4]})
+            gr2 = Graph(store, data={*trp[2:6]})
+
+            gr1 &= gr2
+
+            assert len(gr1) == 2
+            assert trp[2] in gr1
+            assert trp[3] in gr1
+            assert trp[0] not in gr1
+            assert trp[5] not in gr1
+
+
+    def test_xor(self, trp, store):
+        """
+        Test graph intersextion.
+        """
+        with store.txn_ctx():
+            gr1 = Graph(store, data={*trp[:4]})
+            gr2 = Graph(store, data={*trp[2:6]})
+
+            gr3 = gr1 ^ gr2
+
+            assert len(gr3) == 3
+            assert trp[2] not in gr3
+            assert trp[3] not in gr3
+            assert trp[0] in gr3
+            assert trp[5] in gr3
+
+
+    def test_ip_xor(self, trp, store):
+        """
+        Test graph intersextion.
+        """
+        with store.txn_ctx():
+            gr1 = Graph(store, data={*trp[:4]})
+            gr2 = Graph(store, data={*trp[2:6]})
+
+            gr1 ^= gr2
+
+            assert len(gr1) == 3
+            assert trp[2] not in gr1
+            assert trp[3] not in gr1
+            assert trp[0] in gr1
+            assert trp[5] in gr1
+
+
+
+@pytest.mark.usefixtures('trp')
+@pytest.mark.usefixtures('store')
+class TestNamedGraphOps:
+    """
+    Test various operations on a named graph.
+    """
+    def test_len(self, trp, store):
+        """
+        Test the length of a graph with and without duplicates.
+        """
+        imr = Graph(store, uri='http://example.edu/imr01')
+        assert len(imr) == 0
+
+        with store.txn_ctx():
+            imr.add((trp[0],))
+            assert len(imr) == 1
+
+            imr.add((trp[1],)) # Same values
+            assert len(imr) == 1
+
+            imr.add((trp[2],))
+            assert len(imr) == 2
+
+            imr.add(trp)
+            assert len(imr) == 6
+
+
+    def test_dup(self, trp, store):
+        """
+        Test operations with duplicate triples.
+        """
+        imr = Graph(store, uri='http://example.edu/imr01')
+
+        with store.txn_ctx():
+            imr.add((trp[0],))
+            assert trp[1] in imr
+            assert trp[2] not in imr
+
+
+    def test_remove(self, trp, store):
+        """
+        Test adding and removing triples.
+        """
+        with store.txn_ctx():
+            imr = Graph(store, uri='http://example.edu/imr01', data={*trp})
+
+            imr.remove(trp[0])
+            assert len(imr) == 5
+            assert trp[0] not in imr
+            assert trp[1] not in imr
+
+            # This is the duplicate triple.
+            imr.remove(trp[1])
+            assert len(imr) == 5
+
+            # This is the triple in reverse order.
+            imr.remove(trp[2])
+            assert len(imr) == 4
+
+            imr.remove(trp[4])
+            assert len(imr) == 3
+
+
+    def test_union(self, trp, store):
+        """
+        Test graph union.
+        """
+        with store.txn_ctx():
+            gr1 = Graph(store, uri='http://example.edu/imr01', data={*trp[:3]})
+            gr2 = Graph(store, uri='http://example.edu/imr02', data={*trp[2:6]})
+
+            gr3 = gr1 | gr2
+
+            assert len(gr3) == 5
+            assert trp[0] in gr3
+            assert trp[4] in gr3
+
+            assert gr3.uri == None
+
+
+    def test_ip_union(self, trp, store):
+        """
+        Test graph in-place union.
+        """
+        with store.txn_ctx():
+            gr1 = Graph(store, uri='http://example.edu/imr01', data={*trp[:3]})
+            gr2 = Graph(store, uri='http://example.edu/imr02', data={*trp[2:6]})
+
+            gr1 |= gr2
+
+            assert len(gr1) == 5
+            assert trp[0] in gr1
+            assert trp[4] in gr1
+
+            assert gr1.uri == URIRef('http://example.edu/imr01')
+
+
+    def test_addition(self, trp, store):
+        """
+        Test graph addition.
+        """
+        with store.txn_ctx():
+            gr1 = Graph(store, uri='http://example.edu/imr01', data={*trp[:3]})
+            gr2 = Graph(store, uri='http://example.edu/imr02', data={*trp[2:6]})
+
+            gr3 = gr1 + gr2
+
+            assert len(gr3) == 5
+            assert trp[0] in gr3
+            assert trp[4] in gr3
+
+            assert gr3.uri == None
+
+
+    def test_ip_addition(self, trp, store):
+        """
+        Test graph in-place addition.
+        """
+        with store.txn_ctx():
+            gr1 = Graph(store, uri='http://example.edu/imr01', data={*trp[:3]})
+            gr2 = Graph(store, uri='http://example.edu/imr02', data={*trp[2:6]})
+
+            gr1 += gr2
+
+            assert len(gr1) == 5
+            assert trp[0] in gr1
+            assert trp[4] in gr1
+
+            assert gr1.uri == URIRef('http://example.edu/imr01')
+
+
+    def test_subtraction(self, trp, store):
+        """
+        Test graph addition.
+        """
+        with store.txn_ctx():
+            gr1 = Graph(store, uri='http://example.edu/imr01', data={*trp[:4]})
+            gr2 = Graph(store, uri='http://example.edu/imr02', data={*trp[2:6]})
+
+            gr3 = gr1 - gr2
+
+            assert len(gr3) == 1
+            assert trp[0] in gr3
+            assert trp[1] in gr3
+            assert trp[2] not in gr3
+            assert trp[3] not in gr3
+            assert trp[4] not in gr3
+
+            assert gr3.uri == None
+
+            gr3 = gr2 - gr1
+
+            assert len(gr3) == 2
+            assert trp[0] not in gr3
+            assert trp[1] not in gr3
+            assert trp[2] not in gr3
+            assert trp[3] not in gr3
+            assert trp[4] in gr3
+            assert trp[5] in gr3
+
+            assert gr3.uri == None
+
+
+    def test_ip_subtraction(self, trp, store):
+        """
+        Test graph in-place addition.
+        """
+        with store.txn_ctx():
+            gr1 = Graph(store, uri='http://example.edu/imr01', data={*trp[:4]})
+            gr2 = Graph(store, uri='http://example.edu/imr02', data={*trp[2:6]})
+
+            gr1 -= gr2
+
+            assert len(gr1) == 1
+            assert trp[0] in gr1
+            assert trp[1] in gr1
+            assert trp[2] not in gr1
+            assert trp[3] not in gr1
+            assert trp[4] not in gr1
+
+            assert gr1.uri == URIRef('http://example.edu/imr01')
+
+
+
+    def test_intersect(self, trp, store):
+        """
+        Test graph intersextion.
+        """
+        with store.txn_ctx():
+            gr1 = Graph(store, uri='http://example.edu/imr01', data={*trp[:4]})
+            gr2 = Graph(store, uri='http://example.edu/imr02', data={*trp[2:6]})
+
+            gr3 = gr1 & gr2
+
+            assert len(gr3) == 2
+            assert trp[2] in gr3
+            assert trp[3] in gr3
+            assert trp[0] not in gr3
+            assert trp[5] not in gr3
+
+            assert gr3.uri == None
+
+
+    def test_ip_intersect(self, trp, store):
+        """
+        Test graph intersextion.
+        """
+        with store.txn_ctx():
+            gr1 = Graph(store, uri='http://example.edu/imr01', data={*trp[:4]})
+            gr2 = Graph(store, uri='http://example.edu/imr02', data={*trp[2:6]})
+
+            gr1 &= gr2
+
+            assert len(gr1) == 2
+            assert trp[2] in gr1
+            assert trp[3] in gr1
+            assert trp[0] not in gr1
+            assert trp[5] not in gr1
+
+            assert gr1.uri == URIRef('http://example.edu/imr01')
+
+
+    def test_xor(self, trp, store):
+        """
+        Test graph intersextion.
+        """
+        with store.txn_ctx():
+            gr1 = Graph(store, uri='http://example.edu/imr01', data={*trp[:4]})
+            gr2 = Graph(store, uri='http://example.edu/imr02', data={*trp[2:6]})
+
+            gr3 = gr1 ^ gr2
+
+            assert len(gr3) == 3
+            assert trp[2] not in gr3
+            assert trp[3] not in gr3
+            assert trp[0] in gr3
+            assert trp[5] in gr3
+
+            assert gr3.uri == None
+
+
+    def test_ip_xor(self, trp, store):
+        """
+        Test graph intersextion.
+        """
+        with store.txn_ctx():
+            gr1 = Graph(store, uri='http://example.edu/imr01', data={*trp[:4]})
+            gr2 = Graph(store, uri='http://example.edu/imr02', data={*trp[2:6]})
+
+            gr1 ^= gr2
+
+            assert len(gr1) == 3
+            assert trp[2] not in gr1
+            assert trp[3] not in gr1
+            assert trp[0] in gr1
+            assert trp[5] in gr1
+
+            assert gr1.uri == URIRef('http://example.edu/imr01')
+
+
+@pytest.mark.usefixtures('trp')
+@pytest.mark.usefixtures('store')
+class TestHybridOps:
+    """
+    Test operations between IMR and graph.
+    """
+    def test_hybrid_union(self, trp, store):
+        """
+        Test hybrid IMR + graph union.
+        """
+        with store.txn_ctx():
+            gr1 = Graph(store, uri='http://example.edu/imr01', data={*trp[:3]})
+            gr2 = Graph(store, data={*trp[2:6]})
+
+            gr3 = gr1 | gr2
+
+            assert len(gr3) == 5
+            assert trp[0] in gr3
+            assert trp[4] in gr3
+
+            assert isinstance(gr3, Graph)
+            assert gr3.uri == None
+
+            gr4 = gr2 | gr1
+
+            assert isinstance(gr4, Graph)
+
+            assert gr3 == gr4
+
+
+    def test_ip_union_imr(self, trp, store):
+        """
+        Test IMR + graph in-place union.
+        """
+        with store.txn_ctx():
+            gr1 = Graph(store, uri='http://example.edu/imr01', data={*trp[:3]})
+            gr2 = Graph(store, data={*trp[2:6]})
+
+            gr1 |= gr2
+
+            assert len(gr1) == 5
+            assert trp[0] in gr1
+            assert trp[4] in gr1
+
+            assert gr1.uri == URIRef('http://example.edu/imr01')
+
+
+    def test_ip_union_gr(self, trp, store):
+        """
+        Test graph + IMR in-place union.
+        """
+        with store.txn_ctx():
+            gr1 = Graph(store, data={*trp[:3]})
+            gr2 = Graph(store, uri='http://example.edu/imr01', data={*trp[2:6]})
+
+            gr1 |= gr2
+
+            assert len(gr1) == 5
+            assert trp[0] in gr1
+            assert trp[4] in gr1
+
+            assert isinstance(gr1, Graph)

tests/0_store/test_lmdb_store.py → tests/1_store/test_1_0_lmdb_store.py

@@ -1,12 +1,15 @@
+import pdb
 import pytest
 
 from os import path
 from shutil import rmtree
 
-from rdflib import Graph, Namespace, URIRef
+from rdflib import Namespace, URIRef
 from rdflib.graph import DATASET_DEFAULT_GRAPH_ID as RDFLIB_DEFAULT_GRAPH_URI
 from rdflib.namespace import RDF, RDFS
 
+from lakesuperior.model.rdf.graph import Graph
+from lakesuperior.store.base_lmdb_store import LmdbError
 from lakesuperior.store.ldp_rs.lmdb_store import LmdbStore
 
 
@@ -67,6 +70,12 @@ class TestStoreInit:
         assert not path.exists(env_path + '-lock')
 
 
+
+@pytest.mark.usefixtures('store')
+class TestTransactionContext:
+    '''
+    Tests for intializing and shutting down store and transactions.
+    '''
     def test_txn(self, store):
         '''
         Test opening and closing the main transaction.
@@ -106,20 +115,80 @@ class TestStoreInit:
         '''
         Test rolling back a transaction.
         '''
+        trp = (
+            URIRef('urn:nogo:s'), URIRef('urn:nogo:p'), URIRef('urn:nogo:o')
+        )
         try:
             with store.txn_ctx(True):
-                store.add((
-                    URIRef('urn:nogo:s'), URIRef('urn:nogo:p'),
-                    URIRef('urn:nogo:o')))
+                store.add(trp)
                 raise RuntimeError() # This should roll back the transaction.
         except RuntimeError:
             pass
 
         with store.txn_ctx():
-            res = set(store.triples((None, None, None)))
+            res = set(store.triples(trp))
         assert len(res) == 0
 
 
+    def test_nested_ro_txn(self, store):
+        """
+        Test two nested RO transactions.
+        """
+        trp = (URIRef('urn:s:0'), URIRef('urn:p:0'), URIRef('urn:o:0'))
+        with store.txn_ctx(True):
+            store.add(trp)
+        with store.txn_ctx():
+            with store.txn_ctx():
+                res = {*store.triples(trp)}
+                assert trp in {q[0] for q in res}
+            assert trp in {q[0] for q in res}
+
+
+    def test_nested_ro_txn_nowrite(self, store):
+        """
+        Test two nested RO transactions.
+        """
+        trp = (URIRef('urn:s:0'), URIRef('urn:p:0'), URIRef('urn:o:0'))
+        with pytest.raises(LmdbError):
+            with store.txn_ctx():
+                with store.txn_ctx():
+                    store.add(trp)
+
+
+    def test_nested_ro_rw_txn(self, store):
+        """
+        Test a RO transaction nested into a RW one.
+        """
+        trp = (URIRef('urn:s:1'), URIRef('urn:p:1'), URIRef('urn:o:1'))
+        with store.txn_ctx():
+            with store.txn_ctx(True):
+                store.add(trp)
+            # Outer txn should now see the new triple.
+            assert trp in {q[0] for q in store.triples(trp)}
+
+
+    def test_nested_rw_ro_txn(self, store):
+        """
+        Test that a RO transaction nested in a RW transaction can write.
+        """
+        trp = (URIRef('urn:s:2'), URIRef('urn:p:2'), URIRef('urn:o:2'))
+        with store.txn_ctx(True):
+            with store.txn_ctx():
+                store.add(trp)
+            assert trp in {q[0] for q in store.triples(trp)}
+
+
+    def test_nested_rw_rw_txn(self, store):
+        """
+        Test that a RW transaction nested in a RW transaction can write.
+        """
+        trp = (URIRef('urn:s:3'), URIRef('urn:p:3'), URIRef('urn:o:3'))
+        with store.txn_ctx(True):
+            with store.txn_ctx():
+                store.add(trp)
+            assert trp in {q[0] for q in store.triples(trp)}
+
+
 @pytest.mark.usefixtures('store')
 class TestBasicOps:
     '''
@@ -257,6 +326,42 @@ class TestBasicOps:
 
 
 
+@pytest.mark.usefixtures('store', 'bogus_trp')
+class TestExtendedOps:
+    '''
+    Test additional store operations.
+    '''
+
+    def test_all_terms(self, store, bogus_trp):
+        """
+        Test the "all terms" mehods.
+        """
+        with store.txn_ctx(True):
+            for trp in bogus_trp:
+                store.add(trp)
+
+        with store.txn_ctx():
+            all_s = store.all_terms('s')
+            all_p = store.all_terms('p')
+            all_o = store.all_terms('o')
+
+        assert len(all_s) == 1
+        assert len(all_p) == 100
+        assert len(all_o) == 1000
+
+        assert URIRef('urn:test_mp:s1') in all_s
+        assert URIRef('urn:test_mp:s1') not in all_p
+        assert URIRef('urn:test_mp:s1') not in all_o
+
+        assert URIRef('urn:test_mp:p10') not in all_s
+        assert URIRef('urn:test_mp:p10') in all_p
+        assert URIRef('urn:test_mp:p10') not in all_o
+
+        assert URIRef('urn:test_mp:o99') not in all_s
+        assert URIRef('urn:test_mp:o99') not in all_p
+        assert URIRef('urn:test_mp:o99') in all_o
+
+
 @pytest.mark.usefixtures('store', 'bogus_trp')
 class TestEntryCount:
     '''
@@ -648,7 +753,7 @@ class TestContext:
 
         with store.txn_ctx(True):
             store.add_graph(gr_uri)
-            assert gr_uri in {gr.identifier for gr in store.contexts()}
+            assert gr_uri in store.contexts()
 
 
     def test_add_graph_with_triple(self, store):
@@ -663,7 +768,7 @@ class TestContext:
             store.add(trp, ctx_uri)
 
         with store.txn_ctx():
-            assert ctx_uri in {gr.identifier for gr in store.contexts(trp)}
+            assert ctx_uri in store.contexts(trp)
 
 
     def test_empty_context(self, store):
@@ -674,10 +779,10 @@ class TestContext:
 
         with store.txn_ctx(True):
             store.add_graph(gr_uri)
-            assert gr_uri in {gr.identifier for gr in store.contexts()}
+            assert gr_uri in store.contexts()
         with store.txn_ctx(True):
             store.remove_graph(gr_uri)
-            assert gr_uri not in {gr.identifier for gr in store.contexts()}
+            assert gr_uri not in store.contexts()
 
 
     def test_context_ro_txn(self, store):
@@ -697,10 +802,10 @@ class TestContext:
         # allow a lookup in the same transaction, but this does not seem to be
         # possible.
         with store.txn_ctx():
-            assert gr_uri in {gr.identifier for gr in store.contexts()}
+            assert gr_uri in store.contexts()
         with store.txn_ctx(True):
             store.remove_graph(gr_uri)
-            assert gr_uri not in {gr.identifier for gr in store.contexts()}
+            assert gr_uri not in store.contexts()
 
 
     def test_add_trp_to_ctx(self, store):
@@ -731,7 +836,7 @@ class TestContext:
             assert len(set(store.triples((None, None, None), gr_uri))) == 3
             assert len(set(store.triples((None, None, None), gr2_uri))) == 1
 
-            assert gr2_uri in {gr.identifier for gr in store.contexts()}
+            assert gr2_uri in store.contexts()
             assert trp1 in _clean(store.triples((None, None, None)))
             assert trp1 not in _clean(store.triples((None, None, None),
                     RDFLIB_DEFAULT_GRAPH_URI))
@@ -747,11 +852,11 @@ class TestContext:
             res_no_ctx = store.triples(trp3)
             res_ctx = store.triples(trp3, gr2_uri)
             for res in res_no_ctx:
-                assert Graph(identifier=gr_uri) in res[1]
-                assert Graph(identifier=gr2_uri) in res[1]
+                assert Graph(uri=gr_uri) in res[1]
+                assert Graph(uri=gr2_uri) in res[1]
             for res in res_ctx:
-                assert Graph(identifier=gr_uri) in res[1]
-                assert Graph(identifier=gr2_uri) in res[1]
+                assert Graph(uri=gr_uri) in res[1]
+                assert Graph(uri=gr2_uri) in res[1]
 
 
     def test_delete_from_ctx(self, store):
@@ -825,19 +930,6 @@ class TestContext:
             assert len(set(store.triples(trp3))) == 1
 
 
-
-
-
-
-@pytest.mark.usefixtures('store')
-class TestTransactions:
-    '''
-    Tests for transaction handling.
-    '''
-    # @TODO Test concurrent reads and writes.
-    pass
-
-
 #@pytest.mark.usefixtures('store')
 #class TestRdflib:
 #    '''

tests/1_api/test_resource_api.py → tests/2_api/test_2_0_resource_api.py

@@ -4,7 +4,7 @@ import pytest
 from io import BytesIO
 from uuid import uuid4
 
-from rdflib import Graph, Literal, URIRef
+from rdflib import Literal, URIRef
 
 from lakesuperior import env
 from lakesuperior.api import resource as rsrc_api
@@ -13,8 +13,8 @@ from lakesuperior.exceptions import (
         IncompatibleLdpTypeError, InvalidResourceError, ResourceNotExistsError,
         TombstoneError)
 from lakesuperior.globals import RES_CREATED, RES_UPDATED
-from lakesuperior.model.ldpr import Ldpr
-from lakesuperior.store.ldp_rs.lmdb_triplestore import SimpleGraph, Imr
+from lakesuperior.model.ldp.ldpr import Ldpr
+from lakesuperior.model.rdf.graph import Graph, from_rdf
 
 
 @pytest.fixture(scope='module')
@@ -67,10 +67,13 @@ class TestResourceCRUD:
         The ``dcterms:title`` property should NOT be included.
         """
         gr = rsrc_api.get_metadata('/')
-        assert isinstance(gr, SimpleGraph)
+        assert isinstance(gr, Graph)
         assert len(gr) == 9
-        assert gr[gr.uri : nsc['rdf'].type : nsc['ldp'].Resource ]
-        assert not gr[gr.uri : nsc['dcterms'].title : "Repository Root"]
+        with env.app_globals.rdf_store.txn_ctx():
+            assert gr[gr.uri : nsc['rdf'].type : nsc['ldp'].Resource ]
+            assert not gr[
+                gr.uri : nsc['dcterms'].title : Literal("Repository Root")
+            ]
 
 
     def test_get_root_node(self):
@@ -83,9 +86,10 @@ class TestResourceCRUD:
         assert isinstance(rsrc, Ldpr)
         gr = rsrc.imr
         assert len(gr) == 10
-        assert gr[gr.uri : nsc['rdf'].type : nsc['ldp'].Resource ]
-        assert gr[
-            gr.uri : nsc['dcterms'].title : Literal('Repository Root')]
+        with env.app_globals.rdf_store.txn_ctx():
+            assert gr[gr.uri : nsc['rdf'].type : nsc['ldp'].Resource ]
+            assert gr[
+                gr.uri : nsc['dcterms'].title : Literal('Repository Root')]
 
 
     def test_get_nonexisting_node(self):
@@ -102,16 +106,18 @@ class TestResourceCRUD:
         """
         uid = '/rsrc_from_graph'
         uri = nsc['fcres'][uid]
-        gr = Graph().parse(
-            data='<> a <http://ex.org/type#A> .', format='turtle',
-            publicID=uri)
-        evt = rsrc_api.create_or_replace(uid, graph=gr)
+        with env.app_globals.rdf_store.txn_ctx():
+            gr = from_rdf(
+                data='<> a <http://ex.org/type#A> .', format='turtle',
+                publicID=uri)
+        evt, _ = rsrc_api.create_or_replace(uid, graph=gr)
 
         rsrc = rsrc_api.get(uid)
-        assert rsrc.imr[
-                rsrc.uri : nsc['rdf'].type : URIRef('http://ex.org/type#A')]
-        assert rsrc.imr[
-                rsrc.uri : nsc['rdf'].type : nsc['ldp'].RDFSource]
+        with env.app_globals.rdf_store.txn_ctx():
+            assert rsrc.imr[
+                    rsrc.uri : nsc['rdf'].type : URIRef('http://ex.org/type#A')]
+            assert rsrc.imr[
+                    rsrc.uri : nsc['rdf'].type : nsc['ldp'].RDFSource]
 
 
     def test_create_ldp_nr(self):
@@ -124,38 +130,45 @@ class TestResourceCRUD:
                 uid, stream=BytesIO(data), mimetype='text/plain')
 
         rsrc = rsrc_api.get(uid)
-        assert rsrc.content.read() == data
+        with rsrc.imr.store.txn_ctx():
+            assert rsrc.content.read() == data
 
 
     def test_replace_rsrc(self):
         uid = '/test_replace'
         uri = nsc['fcres'][uid]
-        gr1 = Graph().parse(
-            data='<> a <http://ex.org/type#A> .', format='turtle',
-            publicID=uri)
-        evt = rsrc_api.create_or_replace(uid, graph=gr1)
+        with env.app_globals.rdf_store.txn_ctx():
+            gr1 = from_rdf(
+                data='<> a <http://ex.org/type#A> .', format='turtle',
+                publicID=uri
+            )
+        evt, _ = rsrc_api.create_or_replace(uid, graph=gr1)
         assert evt == RES_CREATED
 
         rsrc = rsrc_api.get(uid)
-        assert rsrc.imr[
-                rsrc.uri : nsc['rdf'].type : URIRef('http://ex.org/type#A')]
-        assert rsrc.imr[
-                rsrc.uri : nsc['rdf'].type : nsc['ldp'].RDFSource]
-
-        gr2 = Graph().parse(
-            data='<> a <http://ex.org/type#B> .', format='turtle',
-            publicID=uri)
+        with env.app_globals.rdf_store.txn_ctx():
+            assert rsrc.imr[
+                    rsrc.uri : nsc['rdf'].type : URIRef('http://ex.org/type#A')]
+            assert rsrc.imr[
+                    rsrc.uri : nsc['rdf'].type : nsc['ldp'].RDFSource]
+
+        with env.app_globals.rdf_store.txn_ctx():
+            gr2 = from_rdf(
+                data='<> a <http://ex.org/type#B> .', format='turtle',
+                publicID=uri
+            )
         #pdb.set_trace()
-        evt = rsrc_api.create_or_replace(uid, graph=gr2)
+        evt, _ = rsrc_api.create_or_replace(uid, graph=gr2)
         assert evt == RES_UPDATED
 
         rsrc = rsrc_api.get(uid)
-        assert not rsrc.imr[
-                rsrc.uri : nsc['rdf'].type : URIRef('http://ex.org/type#A')]
-        assert rsrc.imr[
-                rsrc.uri : nsc['rdf'].type : URIRef('http://ex.org/type#B')]
-        assert rsrc.imr[
-                rsrc.uri : nsc['rdf'].type : nsc['ldp'].RDFSource]
+        with env.app_globals.rdf_store.txn_ctx():
+            assert not rsrc.imr[
+                    rsrc.uri : nsc['rdf'].type : URIRef('http://ex.org/type#A')]
+            assert rsrc.imr[
+                    rsrc.uri : nsc['rdf'].type : URIRef('http://ex.org/type#B')]
+            assert rsrc.imr[
+                    rsrc.uri : nsc['rdf'].type : nsc['ldp'].RDFSource]
 
 
     def test_replace_incompatible_type(self):
@@ -167,9 +180,11 @@ class TestResourceCRUD:
         uid_rs = '/test_incomp_rs'
         uid_nr = '/test_incomp_nr'
         data = b'mock binary content'
-        gr = Graph().parse(
-            data='<> a <http://ex.org/type#A> .', format='turtle',
-            publicID=nsc['fcres'][uid_rs])
+        with env.app_globals.rdf_store.txn_ctx():
+            gr = from_rdf(
+                data='<> a <http://ex.org/type#A> .', format='turtle',
+                publicID=nsc['fcres'][uid_rs]
+            )
 
         rsrc_api.create_or_replace(uid_rs, graph=gr)
         rsrc_api.create_or_replace(
@@ -203,17 +218,18 @@ class TestResourceCRUD:
             (URIRef(uri), nsc['rdf'].type, nsc['foaf'].Organization),
         }
 
-        gr = Graph()
-        gr += init_trp
+        with env.app_globals.rdf_store.txn_ctx():
+            gr = Graph(data=init_trp)
         rsrc_api.create_or_replace(uid, graph=gr)
         rsrc_api.update_delta(uid, remove_trp, add_trp)
         rsrc = rsrc_api.get(uid)
 
-        assert rsrc.imr[
-                rsrc.uri : nsc['rdf'].type : nsc['foaf'].Organization]
-        assert rsrc.imr[rsrc.uri : nsc['foaf'].name : Literal('Joe Bob')]
-        assert not rsrc.imr[
-                rsrc.uri : nsc['rdf'].type : nsc['foaf'].Person]
+        with env.app_globals.rdf_store.txn_ctx():
+            assert rsrc.imr[
+                    rsrc.uri : nsc['rdf'].type : nsc['foaf'].Organization]
+            assert rsrc.imr[rsrc.uri : nsc['foaf'].name : Literal('Joe Bob')]
+            assert not rsrc.imr[
+                    rsrc.uri : nsc['rdf'].type : nsc['foaf'].Person]
 
 
     def test_delta_update_wildcard(self):
@@ -235,20 +251,21 @@ class TestResourceCRUD:
             (URIRef(uri), nsc['foaf'].name, Literal('Joan Knob')),
         }
 
-        gr = Graph()
-        gr += init_trp
+        with env.app_globals.rdf_store.txn_ctx():
+            gr = Graph(data=init_trp)
         rsrc_api.create_or_replace(uid, graph=gr)
         rsrc_api.update_delta(uid, remove_trp, add_trp)
         rsrc = rsrc_api.get(uid)
 
-        assert rsrc.imr[
-                rsrc.uri : nsc['rdf'].type : nsc['foaf'].Person]
-        assert rsrc.imr[rsrc.uri : nsc['foaf'].name : Literal('Joan Knob')]
-        assert not rsrc.imr[rsrc.uri : nsc['foaf'].name : Literal('Joe Bob')]
-        assert not rsrc.imr[
-            rsrc.uri : nsc['foaf'].name : Literal('Joe Average Bob')]
-        assert not rsrc.imr[
-            rsrc.uri : nsc['foaf'].name : Literal('Joe 12oz Bob')]
+        with env.app_globals.rdf_store.txn_ctx():
+            assert rsrc.imr[
+                    rsrc.uri : nsc['rdf'].type : nsc['foaf'].Person]
+            assert rsrc.imr[rsrc.uri : nsc['foaf'].name : Literal('Joan Knob')]
+            assert not rsrc.imr[rsrc.uri : nsc['foaf'].name : Literal('Joe Bob')]
+            assert not rsrc.imr[
+                rsrc.uri : nsc['foaf'].name : Literal('Joe Average Bob')]
+            assert not rsrc.imr[
+                rsrc.uri : nsc['foaf'].name : Literal('Joe 12oz Bob')]
 
 
     def test_sparql_update(self):
@@ -272,19 +289,20 @@ class TestResourceCRUD:
         ver_uid = rsrc_api.create_version(uid, 'v1').split('fcr:versions/')[-1]
 
         rsrc = rsrc_api.update(uid, update_str)
-        assert (
-            (rsrc.uri, nsc['dcterms'].title, Literal('Original title.'))
-            not in set(rsrc.imr))
-        assert (
-            (rsrc.uri, nsc['dcterms'].title, Literal('Title #2.'))
-            in set(rsrc.imr))
-        assert (
-            (rsrc.uri, nsc['dcterms'].title, Literal('Title #3.'))
-            in set(rsrc.imr))
-        assert ((
-                URIRef(str(rsrc.uri) + '#h1'),
-                nsc['dcterms'].title, Literal('This is a hash.'))
-            in set(rsrc.imr))
+        with env.app_globals.rdf_store.txn_ctx():
+            assert (
+                (rsrc.uri, nsc['dcterms'].title, Literal('Original title.'))
+                not in set(rsrc.imr))
+            assert (
+                (rsrc.uri, nsc['dcterms'].title, Literal('Title #2.'))
+                in set(rsrc.imr))
+            assert (
+                (rsrc.uri, nsc['dcterms'].title, Literal('Title #3.'))
+                in set(rsrc.imr))
+            assert ((
+                    URIRef(str(rsrc.uri) + '#h1'),
+                    nsc['dcterms'].title, Literal('This is a hash.'))
+                in set(rsrc.imr))
 
 
     def test_create_ldp_dc_post(self, dc_rdf):
@@ -292,14 +310,14 @@ class TestResourceCRUD:
         Create an LDP Direct Container via POST.
         """
         rsrc_api.create_or_replace('/member')
-        dc_uid = rsrc_api.create(
+        dc_rsrc = rsrc_api.create(
                 '/', 'test_dc_post', rdf_data=dc_rdf, rdf_fmt='turtle')
 
-        dc_rsrc = rsrc_api.get(dc_uid)
         member_rsrc = rsrc_api.get('/member')
 
-        assert nsc['ldp'].Container in dc_rsrc.ldp_types
-        assert nsc['ldp'].DirectContainer in dc_rsrc.ldp_types
+        with env.app_globals.rdf_store.txn_ctx():
+            assert nsc['ldp'].Container in dc_rsrc.ldp_types
+            assert nsc['ldp'].DirectContainer in dc_rsrc.ldp_types
 
 
     def test_create_ldp_dc_put(self, dc_rdf):
@@ -307,14 +325,14 @@ class TestResourceCRUD:
         Create an LDP Direct Container via PUT.
         """
         dc_uid = '/test_dc_put01'
-        rsrc_api.create_or_replace(
+        _, dc_rsrc = rsrc_api.create_or_replace(
                 dc_uid, rdf_data=dc_rdf, rdf_fmt='turtle')
 
-        dc_rsrc = rsrc_api.get(dc_uid)
         member_rsrc = rsrc_api.get('/member')
 
-        assert nsc['ldp'].Container in dc_rsrc.ldp_types
-        assert nsc['ldp'].DirectContainer in dc_rsrc.ldp_types
+        with env.app_globals.rdf_store.txn_ctx():
+            assert nsc['ldp'].Container in dc_rsrc.ldp_types
+            assert nsc['ldp'].DirectContainer in dc_rsrc.ldp_types
 
 
     def test_add_dc_member(self, dc_rdf):
@@ -322,15 +340,15 @@ class TestResourceCRUD:
         Add members to a direct container and verify special properties.
         """
         dc_uid = '/test_dc_put02'
-        rsrc_api.create_or_replace(
+        _, dc_rsrc = rsrc_api.create_or_replace(
                 dc_uid, rdf_data=dc_rdf, rdf_fmt='turtle')
 
-        dc_rsrc = rsrc_api.get(dc_uid)
-        child_uid = rsrc_api.create(dc_uid, None)
+        child_uid = rsrc_api.create(dc_uid, None).uid
         member_rsrc = rsrc_api.get('/member')
 
-        assert member_rsrc.imr[
-            member_rsrc.uri: nsc['dcterms'].relation: nsc['fcres'][child_uid]]
+        with env.app_globals.rdf_store.txn_ctx():
+            assert member_rsrc.imr[
+                member_rsrc.uri: nsc['dcterms'].relation: nsc['fcres'][child_uid]]
 
 
     def test_indirect_container(self, ic_rdf):
@@ -352,15 +370,17 @@ class TestResourceCRUD:
                 member_uid, rdf_data=ic_member_rdf, rdf_fmt='turtle')
 
         ic_rsrc = rsrc_api.get(ic_uid)
-        assert nsc['ldp'].Container in ic_rsrc.ldp_types
-        assert nsc['ldp'].IndirectContainer in ic_rsrc.ldp_types
-        assert nsc['ldp'].DirectContainer not in ic_rsrc.ldp_types
+        with env.app_globals.rdf_store.txn_ctx():
+            assert nsc['ldp'].Container in ic_rsrc.ldp_types
+            assert nsc['ldp'].IndirectContainer in ic_rsrc.ldp_types
+            assert nsc['ldp'].DirectContainer not in ic_rsrc.ldp_types
 
         member_rsrc = rsrc_api.get(member_uid)
         top_cont_rsrc = rsrc_api.get(cont_uid)
-        assert top_cont_rsrc.imr[
-            top_cont_rsrc.uri: nsc['dcterms'].relation:
-            nsc['fcres'][target_uid]]
+        with env.app_globals.rdf_store.txn_ctx():
+            assert top_cont_rsrc.imr[
+                top_cont_rsrc.uri: nsc['dcterms'].relation:
+                nsc['fcres'][target_uid]]
 
 
 
@@ -390,7 +410,8 @@ class TestAdvancedDelete:
         rsrc_api.resurrect(uid)
 
         rsrc = rsrc_api.get(uid)
-        assert nsc['ldp'].Resource in rsrc.ldp_types
+        with env.app_globals.rdf_store.txn_ctx():
+            assert nsc['ldp'].Resource in rsrc.ldp_types
 
 
     def test_hard_delete(self):
@@ -434,10 +455,12 @@ class TestAdvancedDelete:
         uid = '/test_soft_delete_children01'
         rsrc_api.resurrect(uid)
         parent_rsrc = rsrc_api.get(uid)
-        assert nsc['ldp'].Resource in parent_rsrc.ldp_types
+        with env.app_globals.rdf_store.txn_ctx():
+            assert nsc['ldp'].Resource in parent_rsrc.ldp_types
         for i in range(3):
             child_rsrc = rsrc_api.get('{}/child{}'.format(uid, i))
-            assert nsc['ldp'].Resource in child_rsrc.ldp_types
+            with env.app_globals.rdf_store.txn_ctx():
+                assert nsc['ldp'].Resource in child_rsrc.ldp_types
 
 
     def test_hard_delete_children(self):
@@ -516,24 +539,26 @@ class TestResourceVersioning:
         rsrc_api.create_or_replace(uid, rdf_data=rdf_data, rdf_fmt='turtle')
         ver_uid = rsrc_api.create_version(uid, 'v1').split('fcr:versions/')[-1]
         #FIXME Without this, the test fails.
-        set(rsrc_api.get_version(uid, ver_uid))
+        #set(rsrc_api.get_version(uid, ver_uid))
 
         rsrc_api.update(uid, update_str)
         current = rsrc_api.get(uid)
-        assert (
-            (current.uri, nsc['dcterms'].title, Literal('Title #2.'))
-            in current.imr)
-        assert (
-            (current.uri, nsc['dcterms'].title, Literal('Original title.'))
-            not in current.imr)
+        with env.app_globals.rdf_store.txn_ctx():
+            assert (
+                (current.uri, nsc['dcterms'].title, Literal('Title #2.'))
+                in current.imr)
+            assert (
+                (current.uri, nsc['dcterms'].title, Literal('Original title.'))
+                not in current.imr)
 
         v1 = rsrc_api.get_version(uid, ver_uid)
-        assert (
-            (v1.uri, nsc['dcterms'].title, Literal('Original title.'))
-            in set(v1))
-        assert (
-            (v1.uri, nsc['dcterms'].title, Literal('Title #2.'))
-            not in set(v1))
+        with env.app_globals.rdf_store.txn_ctx():
+            assert (
+                (v1.uri, nsc['dcterms'].title, Literal('Original title.'))
+                in set(v1))
+            assert (
+                (v1.uri, nsc['dcterms'].title, Literal('Title #2.'))
+                    not in set(v1))
 
 
     def test_revert_to_version(self):
@@ -546,9 +571,10 @@ class TestResourceVersioning:
         ver_uid = 'v1'
         rsrc_api.revert_to_version(uid, ver_uid)
         rev = rsrc_api.get(uid)
-        assert (
-            (rev.uri, nsc['dcterms'].title, Literal('Original title.'))
-            in rev.imr)
+        with env.app_globals.rdf_store.txn_ctx():
+            assert (
+                (rev.uri, nsc['dcterms'].title, Literal('Original title.'))
+                in rev.imr)
 
 
     def test_versioning_children(self):
@@ -570,18 +596,21 @@ class TestResourceVersioning:
         rsrc_api.create_or_replace(ch1_uid)
         ver_uid = rsrc_api.create_version(uid, ver_uid).split('fcr:versions/')[-1]
         rsrc = rsrc_api.get(uid)
-        assert nsc['fcres'][ch1_uid] in rsrc.imr[
-                rsrc.uri : nsc['ldp'].contains]
+        with env.app_globals.rdf_store.txn_ctx():
+            assert nsc['fcres'][ch1_uid] in rsrc.imr[
+                    rsrc.uri : nsc['ldp'].contains]
 
         rsrc_api.create_or_replace(ch2_uid)
         rsrc = rsrc_api.get(uid)
-        assert nsc['fcres'][ch2_uid] in rsrc.imr[
-                rsrc.uri : nsc['ldp'].contains]
+        with env.app_globals.rdf_store.txn_ctx():
+            assert nsc['fcres'][ch2_uid] in rsrc.imr[
+                    rsrc.uri : nsc['ldp'].contains]
 
         rsrc_api.revert_to_version(uid, ver_uid)
         rsrc = rsrc_api.get(uid)
-        assert nsc['fcres'][ch1_uid] in rsrc.imr[
-                rsrc.uri : nsc['ldp'].contains]
-        assert nsc['fcres'][ch2_uid] in rsrc.imr[
-                rsrc.uri : nsc['ldp'].contains]
+        with env.app_globals.rdf_store.txn_ctx():
+            assert nsc['fcres'][ch1_uid] in rsrc.imr[
+                    rsrc.uri : nsc['ldp'].contains]
+            assert nsc['fcres'][ch2_uid] in rsrc.imr[
+                    rsrc.uri : nsc['ldp'].contains]
 

tests/1_api/test_admin_api.py → tests/2_api/test_2_1_admin_api.py

@@ -1,12 +1,17 @@
 import pdb
 import pytest
 
-from rdflib import Graph, URIRef
+from io import BytesIO
+from uuid import uuid4
+
+from rdflib import URIRef
 
 from lakesuperior import env
 from lakesuperior.api import resource as rsrc_api
 from lakesuperior.api import admin as admin_api
 from lakesuperior.dictionaries.namespaces import ns_collection as nsc
+from lakesuperior.exceptions import ChecksumValidationError
+from lakesuperior.model.rdf.graph import Graph, from_rdf
 
 
 @pytest.mark.usefixtures('db')
@@ -21,9 +26,12 @@ class TestAdminApi:
         """
         uid1 = '/test_refint1'
         uid2 = '/test_refint2'
-        gr = Graph().parse(
-                data='<> <http://ex.org/ns#p1> <info:fcres{}> .'.format(uid1),
-                format='turtle', publicID=nsc['fcres'][uid2])
+        with env.app_globals.rdf_store.txn_ctx():
+            gr = from_rdf(
+                store=env.app_globals.rdf_store,
+                data=f'<> <http://ex.org/ns#p1> <info:fcres{uid1}> .',
+                format='turtle', publicID=nsc['fcres'][uid2]
+            )
         rsrc_api.create_or_replace(uid1, graph=gr)
 
         assert admin_api.integrity_check() == set()
@@ -48,7 +56,35 @@ class TestAdminApi:
         assert {trp[2] for trp in check_trp} == {brk_uri}
         assert (nsc['fcres']['/'], nsc['ldp'].contains, brk_uri) in check_trp
         assert (
-                nsc['fcres']['/test_refint2'], 
+                nsc['fcres']['/test_refint2'],
                 URIRef('http://ex.org/ns#p1'), brk_uri) in check_trp
 
 
+    def test_fixity_check_ok(self):
+        """
+        Verify that fixity check passes for a non-corrupted resource.
+        """
+        content = BytesIO(uuid4().bytes)
+        uid = f'/{uuid4()}'
+
+        rsrc_api.create_or_replace(uid, stream=content)
+        admin_api.fixity_check(uid)
+
+
+    def test_fixity_check_corrupt(self):
+        """
+        Verify that fixity check fails for a corrupted resource.
+        """
+        content = BytesIO(uuid4().bytes)
+        uid = f'/{uuid4()}'
+
+        _, rsrc = rsrc_api.create_or_replace(uid, stream=content)
+
+        with env.app_globals.rdf_store.txn_ctx():
+            with open(rsrc.local_path, 'wb') as fh:
+                fh.write(uuid4().bytes)
+
+        with pytest.raises(ChecksumValidationError):
+            admin_api.fixity_check(uid)
+
+

tests/2_endpoints/test_ldp.py → tests/3_endpoints/test_3_0_ldp.py

@@ -1,9 +1,14 @@
+import hashlib
 import pdb
 import pytest
-import uuid
 
 from base64 import b64encode
-from hashlib import sha1
+from datetime import timedelta
+from hashlib import sha1, sha256, blake2b
+from uuid import uuid4
+from werkzeug.http import http_date
+
+import arrow
 
 from flask import g
 from rdflib import Graph
@@ -11,13 +16,17 @@ from rdflib.compare import isomorphic
 from rdflib.namespace import RDF
 from rdflib.term import Literal, URIRef
 
+from lakesuperior import env
 from lakesuperior.dictionaries.namespaces import ns_collection as nsc
-from lakesuperior.model.ldpr import Ldpr
+from lakesuperior.model.ldp.ldpr import Ldpr
+
+
+digest_algo = env.app_globals.config['application']['uuid']['algo']
 
 
 @pytest.fixture(scope='module')
 def random_uuid():
-    return str(uuid.uuid4())
+    return str(uuid4())
 
 
 @pytest.mark.usefixtures('client_class')
@@ -176,13 +185,53 @@ class TestLdp:
         assert sha1(resp.data).hexdigest() == rnd_img['hash']
 
 
+    def test_get_ldp_nr(self, rnd_img):
+        """
+        PUT a resource with binary payload and test various retieval methods.
+        """
+        uid = '/ldpnr03'
+        path = '/ldp' + uid
+        content = b'This is some exciting content.'
+        resp = self.client.put(path, data=content,
+                headers={
+                    'Content-Type': 'text/plain',
+                    'Content-Disposition' : 'attachment; filename=exciting.txt'})
+        assert resp.status_code == 201
+        uri = g.webroot + uid
+
+        # Content retrieval methods.
+        resp_bin1 = self.client.get(path)
+        assert resp_bin1.status_code == 200
+        assert resp_bin1.data == content
+
+        resp_bin2 = self.client.get(path, headers={'accept' : 'text/plain'})
+        assert resp_bin2.status_code == 200
+        assert resp_bin2.data == content
+
+        resp_bin3 = self.client.get(path + '/fcr:content')
+        assert resp_bin3.status_code == 200
+        assert resp_bin3.data == content
+
+        # Metadata retrieval methods.
+        resp_md1 = self.client.get(path, headers={'accept' : 'text/turtle'})
+        assert resp_md1.status_code == 200
+        gr1 = Graph().parse(data=resp_md1.data, format='text/turtle')
+        assert gr1[ URIRef(uri) : nsc['rdf'].type : nsc['ldp'].Resource]
+
+        resp_md2 = self.client.get(path + '/fcr:metadata')
+        assert resp_md2.status_code == 200
+        gr2 = Graph().parse(data=resp_md2.data, format='text/turtle')
+        assert isomorphic(gr1, gr2)
+
+
+
     def test_put_mismatched_ldp_rs(self, rnd_img):
         """
         Verify MIME type / LDP mismatch.
         PUT a LDP-RS, then PUT a LDP-NR on the same location and verify it
         fails.
         """
-        path = '/ldp/' + str(uuid.uuid4())
+        path = '/ldp/' + str(uuid4())
 
         rnd_img['content'].seek(0)
         ldp_nr_resp = self.client.put(path, data=rnd_img['content'],
@@ -205,7 +254,7 @@ class TestLdp:
         PUT a LDP-NR, then PUT a LDP-RS on the same location and verify it
         fails.
         """
-        path = '/ldp/' + str(uuid.uuid4())
+        path = '/ldp/' + str(uuid4())
 
         with open('tests/data/marcel_duchamp_single_subject.ttl', 'rb') as f:
             ldp_rs_resp = self.client.put(path, data=f,
@@ -271,14 +320,14 @@ class TestLdp:
         rnd_img['content'].seek(0)
         resp = self.client.post('/ldp/', data=rnd_img['content'],
                 headers={
-                    'slug': 'ldpnr03',
+                    'slug': 'ldpnr04',
                     'Content-Type': 'image/png',
                     'Content-Disposition' : 'attachment; filename={}'.format(
                     rnd_img['filename'])})
         assert resp.status_code == 201
 
         resp = self.client.get(
-                '/ldp/ldpnr03', headers={'accept' : 'image/png'})
+                '/ldp/ldpnr04', headers={'accept' : 'image/png'})
         assert resp.status_code == 200
         assert sha1(resp.data).hexdigest() == rnd_img['hash']
 
@@ -303,7 +352,7 @@ class TestLdp:
         """
         Verify that a POST to a non-existing parent results in a 404.
         """
-        assert self.client.post('/ldp/{}'.format(uuid.uuid4()))\
+        assert self.client.post('/ldp/{}'.format(uuid4()))\
                 .status_code == 404
 
 
@@ -641,7 +690,701 @@ class TestMimeType:
 
 
 @pytest.mark.usefixtures('client_class')
-@pytest.mark.usefixtures('db')
+class TestDigestHeaders:
+    """
+    Test Digest and ETag headers.
+    """
+
+    def test_etag_digest(self):
+        """
+        Verify ETag and Digest headers on creation.
+
+        The headers must correspond to the checksum of the binary content.
+        """
+        uid = '/test_etag1'
+        path = '/ldp' + uid
+        content = uuid4().bytes
+        content_cksum = hashlib.new(digest_algo, content)
+
+        put_rsp = self.client.put(
+            path, data=content, headers={'content-type': 'text/plain'})
+
+        assert content_cksum.hexdigest() in \
+            put_rsp.headers.get('etag').split(',')
+        assert put_rsp.headers.get('digest') == \
+            f'{digest_algo.upper()}=' + b64encode(content_cksum.digest()).decode()
+
+        get_rsp = self.client.get(path)
+
+        assert content_cksum.hexdigest() in \
+            put_rsp.headers.get('etag').split(',')
+        assert get_rsp.headers.get('digest') == \
+            f'{digest_algo.upper()}='  + b64encode(content_cksum.digest()).decode()
+
+
+    def test_etag_ident(self):
+        """
+        Verify that two resources with the same content yield identical ETags.
+        """
+        path1 = f'/ldp/{uuid4()}'
+        path2 = f'/ldp/{uuid4()}'
+
+        content = uuid4().bytes
+        content_cksum = hashlib.new(digest_algo, content)
+
+        self.client.put(
+            path1, data=content, headers={'content-type': 'text/plain'})
+        self.client.put(
+            path2, data=content, headers={'content-type': 'text/plain'})
+
+        get_rsp1 = self.client.get(path1)
+        get_rsp2 = self.client.get(path2)
+
+        assert get_rsp1.headers.get('etag') == get_rsp2.headers.get('etag')
+        assert get_rsp1.headers.get('digest') == get_rsp2.headers.get('digest')
+
+
+    def test_etag_diff(self):
+        """
+        Verify that two resources with different content yield different ETags.
+        """
+        path1 = f'/ldp/{uuid4()}'
+        path2 = f'/ldp/{uuid4()}'
+
+        content1 = b'some interesting content.'
+        content_cksum1 = hashlib.new(digest_algo, content1)
+        content2 = b'Some great content.'
+        content_cksum2 = hashlib.new(digest_algo, content2)
+
+        self.client.put(
+            path1, data=content1, headers={'content-type': 'text/plain'})
+        self.client.put(
+            path2, data=content2, headers={'content-type': 'text/plain'})
+
+        get_rsp1 = self.client.get(path1)
+        get_rsp2 = self.client.get(path2)
+
+        assert get_rsp1.headers.get('etag') != get_rsp2.headers.get('etag')
+        assert get_rsp1.headers.get('digest') != get_rsp2.headers.get('digest')
+
+
+    def test_etag_update(self):
+        """
+        Verify that ETag and digest change when the resource is updated.
+
+        The headers should NOT change if the same binary content is
+        re-submitted.
+        """
+        path = f'/ldp/{uuid4()}'
+        content1 = uuid4().bytes
+        content_cksum1 = hashlib.new(digest_algo, content1)
+        content2 = uuid4().bytes
+        content_cksum2 = hashlib.new(digest_algo, content2)
+
+        self.client.put(
+            path, data=content1, headers={'content-type': 'text/plain'})
+        get_rsp = self.client.get(path)
+
+        assert content_cksum1.hexdigest() == \
+            get_rsp.headers.get('etag').strip('"')
+        assert get_rsp.headers.get('digest') == \
+            f'{digest_algo.upper()}=' + b64encode(content_cksum1.digest()).decode()
+
+        put_rsp = self.client.put(
+            path, data=content2, headers={'content-type': 'text/plain'})
+
+        assert content_cksum2.hexdigest() == \
+            put_rsp.headers.get('etag').strip('"')
+        assert put_rsp.headers.get('digest') == \
+            f'{digest_algo.upper()}=' + b64encode(content_cksum2.digest()).decode()
+
+        get_rsp = self.client.get(path)
+
+        assert content_cksum2.hexdigest() == \
+            get_rsp.headers.get('etag').strip('"')
+        assert get_rsp.headers.get('digest') == \
+            f'{digest_algo.upper()}=' + b64encode(content_cksum2.digest()).decode()
+
+
+    def test_etag_rdf(self):
+        """
+        Verify that LDP-RS resources don't get an ETag.
+
+        TODO This is by design for now; when a reliable hashing method
+        for a graph is devised, this test should change.
+        """
+        path = f'/ldp/{uuid4()}'
+
+        put_rsp = self.client.put(path)
+        assert not put_rsp.headers.get('etag')
+        assert not put_rsp.headers.get('digest')
+
+        get_rsp = self.client.get(path)
+        assert not get_rsp.headers.get('etag')
+        assert not get_rsp.headers.get('digest')
+
+
+    def test_digest_put(self):
+        """
+        Test the ``Digest`` header with PUT to verify content integrity.
+        """
+        path1 = f'/ldp/{uuid4()}'
+        path2 = f'/ldp/{uuid4()}'
+        path3 = f'/ldp/{uuid4()}'
+        content = uuid4().bytes
+        content_sha1 = sha1(content).hexdigest()
+        content_sha256 = sha256(content).hexdigest()
+        content_blake2b = blake2b(content).hexdigest()
+
+        assert self.client.put(path1, data=content, headers={
+                'digest': 'sha1=abcd'}).status_code == 409
+
+        assert self.client.put(path1, data=content, headers={
+                'digest': f'sha1={content_sha1}'}).status_code == 201
+
+        assert self.client.put(path2, data=content, headers={
+                'digest': f'SHA1={content_sha1}'}).status_code == 201
+
+        assert self.client.put(path3, data=content, headers={
+                'digest': f'SHA256={content_sha256}'}).status_code == 201
+
+        assert self.client.put(path3, data=content, headers={
+                'digest': f'blake2b={content_blake2b}'}).status_code == 204
+
+
+    def test_digest_post(self):
+        """
+        Test the ``Digest`` header with POST to verify content integrity.
+        """
+        path = '/ldp'
+        content = uuid4().bytes
+        content_sha1 = sha1(content).hexdigest()
+        content_sha256 = sha256(content).hexdigest()
+        content_blake2b = blake2b(content).hexdigest()
+
+        assert self.client.post(path, data=content, headers={
+                'digest': 'sha1=abcd'}).status_code == 409
+
+        assert self.client.post(path, data=content, headers={
+                'digest': f'sha1={content_sha1}'}).status_code == 201
+
+        assert self.client.post(path, data=content, headers={
+                'digest': f'SHA1={content_sha1}'}).status_code == 201
+
+        assert self.client.post(path, data=content, headers={
+                'digest': f'SHA256={content_sha256}'}).status_code == 201
+
+        assert self.client.post(path, data=content, headers={
+                'digest': f'blake2b={content_blake2b}'}).status_code == 201
+
+
+
+@pytest.mark.usefixtures('client_class')
+class TestETagCondHeaders:
+    """
+    Test Digest and ETag headers.
+    """
+
+    def test_if_match_get(self):
+        """
+        Test the If-Match header on GET requests.
+
+        Test providing single and multiple ETags.
+        """
+        path = '/ldp/test_if_match1'
+        content = uuid4().bytes
+        content_cksum = hashlib.new(digest_algo, content).hexdigest()
+        bogus_cksum = uuid4().hex
+
+        self.client.put(
+            path, data=content, headers={'content-type': 'text/plain'})
+
+        get_rsp = self.client.get(path, headers={
+            'if-match': f'"{content_cksum}"'})
+        assert get_rsp.status_code == 200
+
+        get_rsp = self.client.get(path, headers={
+            'if-match': f'"{bogus_cksum}"'})
+        assert get_rsp.status_code == 412
+
+        get_rsp = self.client.get(path, headers={
+            'if-match': f'"{content_cksum}", "{bogus_cksum}"'})
+        assert get_rsp.status_code == 200
+
+
+    def test_if_match_put(self):
+        """
+        Test the If-Match header on PUT requests.
+
+        Test providing single and multiple ETags.
+        """
+        path = '/ldp/test_if_match1'
+        content = uuid4().bytes
+        content_cksum = hashlib.new(digest_algo, content).hexdigest()
+        bogus_cksum = uuid4().hex
+
+        get_rsp = self.client.get(path)
+        old_cksum = get_rsp.headers.get('etag')
+
+        put_rsp = self.client.put(path, data=content, headers={
+            'if-match': f'"{content_cksum}"'})
+        assert put_rsp.status_code == 412
+
+        put_rsp = self.client.put(path, data=content, headers={
+            'if-match': f'"{content_cksum}", "{bogus_cksum}"'})
+        assert put_rsp.status_code == 412
+
+        put_rsp = self.client.put(path, data=content, headers={
+            'if-match': f'"{old_cksum}", "{bogus_cksum}"'})
+        assert put_rsp.status_code == 204
+
+        # Now contents have changed.
+        put_rsp = self.client.put(path, data=content, headers={
+            'if-match': f'"{old_cksum}"'})
+        assert put_rsp.status_code == 412
+
+        put_rsp = self.client.put(path, data=content, headers={
+            'if-match': f'"{content_cksum}"'})
+        assert put_rsp.status_code == 204
+
+        # Exactly the same content was uploaded, so the ETag should not have
+        # changed.
+        put_rsp = self.client.put(path, data=content, headers={
+            'if-match': f'"{content_cksum}"'})
+        assert put_rsp.status_code == 204
+
+        # Catch-all: Proceed if resource exists at the given location.
+        put_rsp = self.client.put(path, data=content, headers={
+            'if-match': '*'})
+        assert put_rsp.status_code == 204
+
+        # This is wrong syntax. It will not update because the literal asterisk
+        # won't match.
+        put_rsp = self.client.put(path, data=content, headers={
+            'if-match': '"*"'})
+        assert put_rsp.status_code == 412
+
+        # Test delete.
+        del_rsp = self.client.delete(path, headers={
+            'if-match': f'"{old_cksum}"', 'Prefer': 'no-tombstone'})
+        assert del_rsp.status_code == 412
+
+        del_rsp = self.client.delete(path, headers={
+            'if-match': f'"{content_cksum}"', 'Prefer': 'no-tombstone'})
+        assert del_rsp.status_code == 204
+
+
+        put_rsp = self.client.put(path, data=content, headers={
+            'if-match': '*'})
+        assert put_rsp.status_code == 412
+
+
+    def test_if_none_match_get(self):
+        """
+        Test the If-None-Match header on GET requests.
+
+        Test providing single and multiple ETags.
+        """
+        path = '/ldp/test_if_none_match1'
+        content = uuid4().bytes
+        content_cksum = hashlib.new(digest_algo, content).hexdigest()
+        bogus_cksum = uuid4().hex
+
+        self.client.put(
+            path, data=content, headers={'content-type': 'text/plain'})
+
+        get_rsp1 = self.client.get(path, headers={
+            'if-none-match': f'"{content_cksum}"'})
+        assert get_rsp1.status_code == 304
+
+        get_rsp2 = self.client.get(path, headers={
+            'if-none-match': f'"{bogus_cksum}"'})
+        assert get_rsp2.status_code == 200
+
+        get_rsp3 = self.client.get(path, headers={
+            'if-none-match': f'"{content_cksum}", "{bogus_cksum}"'})
+        assert get_rsp3.status_code == 304
+
+        # 404 has precedence on ETag handling.
+        get_rsp = self.client.get('/ldp/bogus', headers={
+            'if-none-match': f'"{bogus_cksum}"'})
+        assert get_rsp.status_code == 404
+
+        get_rsp = self.client.get('/ldp/bogus', headers={
+            'if-none-match': f'"{content_cksum}"'})
+        assert get_rsp.status_code == 404
+
+
+    def test_if_none_match_put(self):
+        """
+        Test the If-None-Match header on PUT requests.
+
+        Test providing single and multiple ETags.
+
+        Uses a previously created resource.
+        """
+        path = '/ldp/test_if_none_match1'
+        content = uuid4().bytes
+        content_cksum = hashlib.new(digest_algo, content).hexdigest()
+        bogus_cksum = uuid4().hex
+
+        get_rsp = self.client.get(path)
+        old_cksum = get_rsp.headers.get('etag')
+
+        put_rsp = self.client.put(path, data=content, headers={
+            'if-none-match': f'"{old_cksum}"'})
+        assert put_rsp.status_code == 412
+
+        put_rsp = self.client.put(path, data=content, headers={
+            'if-none-match': f'"{old_cksum}", "{bogus_cksum}"'})
+        assert put_rsp.status_code == 412
+
+        put_rsp = self.client.put(path, data=content, headers={
+            'if-none-match': f'"{bogus_cksum}"'})
+        assert put_rsp.status_code == 204
+
+        # Now contents have changed.
+        put_rsp = self.client.put(path, data=content, headers={
+            'if-none-match': f'"{content_cksum}"'})
+        assert put_rsp.status_code == 412
+
+        put_rsp = self.client.put(path, data=content, headers={
+            'if-none-match': f'"{old_cksum}"'})
+        assert put_rsp.status_code == 204
+
+        # Catch-all: fail if any resource exists at the given location.
+        put_rsp = self.client.put(path, data=content, headers={
+            'if-none-match': '*'})
+        assert put_rsp.status_code == 412
+
+        # Test delete.
+        del_rsp = self.client.delete(path, headers={
+            'if-none-match': f'"{content_cksum}"', 'Prefer': 'no-tombstone'})
+        assert del_rsp.status_code == 412
+
+        del_rsp = self.client.delete(path, headers={
+            'if-none-match': f'"{bogus_cksum}"', 'Prefer': 'no-tombstone'})
+        assert del_rsp.status_code == 204
+
+
+        put_rsp = self.client.put(path, data=content, headers={
+            'if-none-match': '*'})
+        assert put_rsp.status_code == 201
+
+        # This is wrong syntax. It will update because the literal asterisk
+        # won't match.
+        put_rsp = self.client.put(path, data=content, headers={
+            'if-none-match': '"*"'})
+        assert put_rsp.status_code == 204
+
+
+    def test_etag_notfound(self):
+        """
+        Verify that 404 and 410 have precedence on ETag handling.
+        """
+        path = f'/ldp/{uuid4()}'
+        bogus_cksum = uuid4().hex
+
+        get_rsp = self.client.get(path, headers={
+            'if-match': f'"{bogus_cksum}"'})
+        assert get_rsp.status_code == 404
+
+        get_rsp = self.client.get(path, headers={
+            'if-match': '*'})
+        assert get_rsp.status_code == 404
+
+        get_rsp = self.client.get(path, headers={
+            'if-none-match': f'"{bogus_cksum}"'})
+        assert get_rsp.status_code == 404
+
+        self.client.put(path)
+        self.client.delete(path)
+
+        get_rsp = self.client.get(path, headers={
+            'if-match': f'"{bogus_cksum}"'})
+        assert get_rsp.status_code == 410
+
+        get_rsp = self.client.get(path, headers={
+            'if-none-match': f'"{bogus_cksum}"'})
+        assert get_rsp.status_code == 410
+
+        get_rsp = self.client.get(path, headers={
+            'if-match': '*'})
+        assert get_rsp.status_code == 410
+
+
+
+@pytest.mark.usefixtures('client_class')
+class TestModifyTimeCondHeaders:
+    """
+    Test time-related conditional headers.
+    """
+
+    @pytest.fixture(scope='class')
+    def timeframe(self):
+        """
+        Times used in these tests: UTC midnight of today, yesterday, tomorrow.
+        """
+        today = arrow.utcnow().floor('day')
+        yesterday = today.shift(days=-1)
+        tomorrow = today.shift(days=1)
+
+        path = f'/ldp/{uuid4()}'
+        self.client.put(path)
+
+        return path, today, yesterday, tomorrow
+
+
+    def test_nothing(self):
+        """
+        For some reason, without this the fixture won't initialize properly.
+        """
+        self.client.get('/')
+
+
+    def test_if_modified_since(self, timeframe):
+        """
+        Test various uses of the If-Modified-Since header.
+        """
+        path, today, yesterday, tomorrow = timeframe
+
+        assert self.client.head(
+            path, headers={'if-modified-since': http_date(today.timestamp)}
+        ).status_code == 200
+
+        assert self.client.get(
+            path, headers={'if-modified-since': http_date(today.timestamp)}
+        ).status_code == 200
+
+        assert self.client.head(
+            path, headers={'if-modified-since': http_date(yesterday.timestamp)}
+        ).status_code == 200
+
+        assert self.client.get(
+            path, headers={'if-modified-since': http_date(yesterday.timestamp)}
+        ).status_code == 200
+
+        assert self.client.head(
+            path, headers={'if-modified-since': http_date(tomorrow.timestamp)}
+        ).status_code == 304
+
+        assert self.client.get(
+            path, headers={'if-modified-since': http_date(tomorrow.timestamp)}
+        ).status_code == 304
+
+
+    def test_if_unmodified_since(self, timeframe):
+        """
+        Test various uses of the If-Unmodified-Since header.
+        """
+        path, today, yesterday, tomorrow = timeframe
+
+        assert self.client.head(
+            path, headers={'if-unmodified-since': http_date(today.timestamp)}
+        ).status_code == 304
+
+        assert self.client.get(
+            path, headers={'if-unmodified-since': http_date(today.timestamp)}
+        ).status_code == 304
+
+        assert self.client.head(
+            path, headers={'if-unmodified-since': http_date(yesterday.timestamp)}
+        ).status_code == 304
+
+        assert self.client.get(
+            path, headers={'if-unmodified-since': http_date(yesterday.timestamp)}
+        ).status_code == 304
+
+        assert self.client.head(
+            path, headers={'if-unmodified-since': http_date(tomorrow.timestamp)}
+        ).status_code == 200
+
+        assert self.client.get(
+            path, headers={'if-unmodified-since': http_date(tomorrow.timestamp)}
+        ).status_code == 200
+
+
+    def test_time_range(self, timeframe):
+        """
+        Test conditions inside and outside of a time range.
+        """
+        path, today, yesterday, tomorrow = timeframe
+
+        # Send me the resource if it has been modified between yesterday
+        # and tomorrow.
+        assert self.client.get(path, headers={
+            'if-modified-since': http_date(yesterday.timestamp),
+            'if-unmodified-since': http_date(tomorrow.timestamp),
+        }).status_code == 200
+
+        # Send me the resource if it has been modified between today
+        # and tomorrow.
+        assert self.client.get(path, headers={
+            'if-modified-since': http_date(today.timestamp),
+            'if-unmodified-since': http_date(tomorrow.timestamp),
+        }).status_code == 200
+
+        # Send me the resource if it has been modified between yesterday
+        # and today.
+        assert self.client.get(path, headers={
+            'if-modified-since': http_date(yesterday.timestamp),
+            'if-unmodified-since': http_date(today.timestamp),
+        }).status_code == 304
+
+        # Send me the resource if it has been modified between two days ago
+        # and yesterday.
+        assert self.client.get(path, headers={
+            'if-modified-since': http_date(yesterday.shift(days=-1).timestamp),
+            'if-unmodified-since': http_date(yesterday.timestamp),
+        }).status_code == 304
+
+        # Send me the resource if it has been modified between tomorrow
+        # and two days from today.
+        assert self.client.get(path, headers={
+            'if-modified-since': http_date(tomorrow.timestamp),
+            'if-unmodified-since': http_date(tomorrow.shift(days=1).timestamp),
+        }).status_code == 304
+
+
+    def test_time_etag_combo(self, timeframe):
+        """
+        Test evaluation priorities among ETag and time headers.
+        """
+        _, today, yesterday, tomorrow = timeframe
+
+        path = f'/ldp/{uuid4()}'
+        content = uuid4().bytes
+        content_cksum = hashlib.new(digest_algo, content).hexdigest()
+        bogus_cksum = uuid4().hex
+
+        self.client.put(
+            path, data=content, headers={'content-type': 'text/plain'})
+
+        # Negative ETag match wins.
+        assert self.client.get(path, headers={
+            'if-match': f'"{bogus_cksum}"',
+            'if-modified-since': http_date(yesterday.timestamp),
+        }).status_code == 412
+
+        assert self.client.get(path, headers={
+            'if-match': f'"{bogus_cksum}"',
+            'if-unmodified-since': http_date(tomorrow.timestamp),
+        }).status_code == 412
+
+        assert self.client.get(path, headers={
+            'if-none-match': f'"{content_cksum}"',
+            'if-modified-since': http_date(yesterday.timestamp),
+        }).status_code == 304
+
+        assert self.client.get(path, headers={
+            'if-none-match': f'"{content_cksum}"',
+            'if-unmodified-since': http_date(tomorrow.timestamp),
+        }).status_code == 304
+
+        # Positive ETag match wins.
+        assert self.client.get(path, headers={
+            'if-match': f'"{content_cksum}"',
+            'if-unmodified-since': http_date(yesterday.timestamp),
+        }).status_code == 200
+
+        assert self.client.get(path, headers={
+            'if-match': f'"{content_cksum}"',
+            'if-modified-since': http_date(tomorrow.timestamp),
+        }).status_code == 200
+
+        assert self.client.get(path, headers={
+            'if-none-match': f'"{bogus_cksum}"',
+            'if-unmodified-since': http_date(yesterday.timestamp),
+        }).status_code == 200
+
+        assert self.client.get(path, headers={
+            'if-none-match': f'"{bogus_cksum}"',
+            'if-modified-since': http_date(tomorrow.timestamp),
+        }).status_code == 200
+
+
+
+@pytest.mark.usefixtures('client_class')
+class TestRange:
+    """
+    Test byte range retrieval.
+
+    This should not need too deep testing since it's functionality implemented
+    in Werkzeug/Flask.
+    """
+    @pytest.fixture(scope='class')
+    def bytestream(self):
+        """
+        Create a sample bytestream with predictable (8x8 bytes) content.
+        """
+        return b''.join([bytes([n] * 8) for n in range(8)])
+
+
+    def test_get_range(self, bytestream):
+        """
+        Get different ranges of the bitstream.
+        """
+        path = '/ldp/test_range'
+        self.client.put(path, data=bytestream)
+
+        # First 8 bytes.
+        assert self.client.get(
+            path, headers={'range': 'bytes=0-7'}).data == b'\x00' * 8
+
+        # Last 4 bytes of first block, first 4 of second block.
+        assert self.client.get(
+            path, headers={'range': 'bytes=4-11'}
+        ).data == b'\x00' * 4 + b'\x01' * 4
+
+        # Last 8 bytes.
+        assert self.client.get(
+            path, headers={'range': 'bytes=56-'}).data == b'\x07' * 8
+
+
+    def test_fail_ranges(self, bytestream):
+        """
+        Test malformed or unsupported ranges.
+        """
+        path = '/ldp/test_range'
+
+        # TODO This shall be a 206 when multiple ranges are supported.
+        fail_rsp = self.client.get(path, headers={'range': 'bytes=0-1, 7-8'})
+        assert fail_rsp.status_code == 501
+
+        # Bad ranges will be ignored.
+        for rng in ((10, 4), ('', 3), (3600, 6400)):
+            bad_rsp = self.client.get(
+                path, headers={'range': 'bytes={rng[0]}-{rng[1]}'})
+            assert bad_rsp.status_code == 200
+            assert bad_rsp.data == bytestream
+            assert int(bad_rsp.headers['content-length']) == len(bytestream)
+
+
+    def test_range_rsp_headers(self, bytestream):
+        """
+        Test various headers for a ranged response.
+        """
+        path = '/ldp/test_range'
+        start_b = 0
+        end_b = 7
+
+        full_rsp = self.client.get(path)
+        part_rsp = self.client.get(path, headers={
+            'range': f'bytes={start_b}-{end_b}'})
+
+        for hdr_name in ['etag', 'digest', 'content-type']:
+            assert part_rsp.headers[hdr_name] == full_rsp.headers[hdr_name]
+
+        for hdr in part_rsp.headers['link']:
+            assert hdr in full_rsp.headers['link']
+
+        assert int(part_rsp.headers['content-length']) == end_b - start_b + 1
+        assert part_rsp.headers['content-range'] == \
+                f'bytes {start_b}-{end_b} / {len(bytestream)}'
+
+
+
+@pytest.mark.usefixtures('client_class')
 class TestPrefHeader:
     """
     Test various combinations of `Prefer` header.
@@ -1009,9 +1752,6 @@ class TestVersion:
         assert v1_uri != dup_uri
 
 
-    @pytest.mark.skip(
-            reason='TODO Reverting from version and resurrecting is not fully '
-            'functional.')
     def test_revert_version(self):
         """
         Take a version snapshot, update a resource, and then revert to the

tests/3_endpoints/test_3_1_admin.py

@@ -0,0 +1,72 @@
+import pytest
+
+from io import BytesIO
+from uuid import uuid4
+
+from lakesuperior import env
+from lakesuperior.api import resource as rsrc_api
+
+
+@pytest.mark.usefixtures('client_class')
+@pytest.mark.usefixtures('db')
+class TestAdminApi:
+    """
+    Test admin endpoint.
+    """
+
+    def test_fixity_check_ok(self):
+        """
+        Verify that fixity check passes for a non-corrupted resource.
+        """
+        uid = uuid4()
+        content = uuid4().bytes
+        path = f'/ldp/{uid}'
+        fix_path = f'/admin/{uid}/fixity'
+
+        self.client.put(
+            path, data=content, headers={'content-type': 'text/plain'})
+
+        assert self.client.get(fix_path).status_code == 200
+
+
+    def test_fixity_check_corrupt(self):
+        """
+        Verify that fixity check fails for a corrupted resource.
+        """
+        uid = uuid4()
+        content = uuid4().bytes
+        path = f'/ldp/{uid}'
+        fix_path = f'/admin/{uid}/fixity'
+
+        self.client.put(
+            path, data=content, headers={'content-type': 'text/plain'})
+
+        rsrc = rsrc_api.get(f'/{uid}')
+
+        with env.app_globals.rdf_store.txn_ctx():
+            fname = rsrc.local_path
+        with open(fname, 'wb') as fh:
+            fh.write(uuid4().bytes)
+
+        assert self.client.get(fix_path).status_code == 412
+
+
+    def test_fixity_check_missing(self):
+        """
+        Verify that fixity check is not performed on a missing resource.
+        """
+        uid = uuid4()
+        content = uuid4().bytes
+        path = f'/ldp/{uid}'
+        fix_path = f'/admin/{uid}/fixity'
+
+        assert self.client.get(fix_path).status_code == 404
+
+        self.client.put(
+            path, data=content, headers={'content-type': 'text/plain'})
+
+        self.client.delete(path)
+
+        assert self.client.get(fix_path).status_code == 410
+
+