#include "buffer.h"

/* * * Inline extern prototypes * * */

LSUP_Buffer *LSUP_buffer_new (const size_t size, const void *data);
LSUP_rc LSUP_buffer_init (
        LSUP_Buffer *buf, const size_t size, const void *data);
bool LSUP_buffer_eq (const LSUP_Buffer *buf1, const LSUP_Buffer *buf2);
int LSUP_buffer_cmp (const LSUP_Buffer *buf1, const LSUP_Buffer *buf2);


/* * * API * * */

LSUP_rc
LSUP_buffer_init (LSUP_Buffer *buf, const size_t size, const void *data)
{
    // If size is zero, addr becomes NULL.
    void *tmp = realloc (buf->addr, size);
    if (UNLIKELY (size > 0 && tmp == NULL)) return LSUP_MEM_ERR;

    buf->addr = tmp;
    buf->size = size;

    if (data) memcpy (buf->addr, data, buf->size);

    return LSUP_OK;
}


void LSUP_buffer_print (const LSUP_Buffer *buf)
{
    for (size_t i = 0; i < buf->size; i++) {
        char chr = ((char*)buf->addr)[i];
        if (isprint (chr)) {
            fputc (chr, stdout);
        } else {
            printf ("\\x%02x", chr);
        }
    }
    printf ("\n");
}


void LSUP_buffer_done (LSUP_Buffer *buf)
{
    if (LIKELY (buf)) free (buf->addr);
}

void LSUP_buffer_free (LSUP_Buffer *buf)
{
    LSUP_buffer_done (buf);
    free (buf);
}