BASEDIR = ../..
CC = gcc
LEXER = re2c
PARSER = $(BASEDIR)/bin/lemon
LEMON_SRC_DIR = $(BASEDIR)/ext/sqlite/tool

INCLUDE_DIR = $(BASEDIR)/include
CODEC_INCLUDE_DIR = $(INCLUDE_DIR)/volksdata/codec
BUILDDIR = $(BASEDIR)/build

CODEC_SRC = $(wildcard codec_*.c)
PARSER_SRC = $(CODEC_SRC:codec_%=parser_%)
ifneq ($(DEBUG), 0)
CODEC_OBJ := $(CODEC_SRC:%.c=$(BUILDDIR)/%_dbg.o)
else
CODEC_OBJ := $(CODEC_SRC:%.c=$(BUILDDIR)/%.o)
endif
PARSER_OBJ := $(subst codec,parser,$(CODEC_OBJ))
GRAMMAR_OBJ := $(subst codec,grammar,$(CODEC_OBJ))
OBJ = $(GRAMMAR_OBJ) $(PARSER_OBJ) $(CODEC_OBJ)

INCLUDE := -I$(INCLUDE_DIR) -I$(BASEDIR)/ext/tpl/src -I$(BASEDIR)/ext/hashmap \
	-I$(BASEDIR)/ext/log/src
_CFLAGS := -std=gnu11 -Wall -fPIC $(INCLUDE)

ifneq ($(DEBUG), 0)
CFLAGS = $(_CFLAGS) -I$(BASEDIR)/test -O0 -g3 -DDEBUG
else
CFLAGS = $(_CFLAGS) -O3 -g0
endif

$(info CODEC_OBJ: $(CODEC_OBJ))
$(info GRAMMAR_OBJ: $(GRAMMAR_OBJ))
$(info PARSER_OBJ: $(PARSER_OBJ))
$(info OBJ: $(OBJ))
$(info CFLAGS: $(CFLAGS))

.DEFAULT_GOAL := codec

.PHONY: codec
codec: $(OBJ)

.PHONY: parsers
parsers: $(PARSER_SRC)

$(BUILDDIR)/%.o: %.c
	$(CC) $(CFLAGS) -c $^ -o $@

$(BUILDDIR)/%_dbg.o: %.c
	$(CC) $(CFLAGS) -c $^ -o $@

# Parser C sources.
parser_%.c: lexer_%.re grammar_%.c ../codec.c
	$(LEXER) $< -o $@ -T --case-ranges


.PRECIOUS: grammar_%.c $(CODEC_INCLUDE_DIR)/tokens_%.h
# Parser generators.
grammar_%.c $(CODEC_INCLUDE_DIR)/tokens_%.h: grammar_%.y
	mkdir -p $(BUILDDIR)
	$(PARSER) $< -p -T$(LEMON_SRC_DIR)/lempar.c -d$(BUILDDIR)
	mv $(BUILDDIR)/grammar_$*.h $(CODEC_INCLUDE_DIR)/tokens_$*.h
	mv $(BUILDDIR)/grammar_$*.c ./