Function _cupsStrAlloc

cups/string.c:44–136

 */

char *					/* O - String pointer */
_cupsStrAlloc(const char *s)		/* I - String */
{
  size_t		slen;		/* Length of string */
  _cups_sp_item_t	*item,		/* String pool item */
			*key;		/* Search key */


 /*
  * Range check input...
  */

  if (!s)
    return (NULL);

 /*
  * Get the string pool...
  */

  _cupsMutexLock(&sp_mutex);

  if (!stringpool)
    stringpool = cupsArrayNew((cups_array_func_t)compare_sp_items, NULL);

  if (!stringpool)
  {
    _cupsMutexUnlock(&sp_mutex);

    return (NULL);
  }

 /*
  * See if the string is already in the pool...
  */

  key = (_cups_sp_item_t *)(s - offsetof(_cups_sp_item_t, str));

  if ((item = (_cups_sp_item_t *)cupsArrayFind(stringpool, key)) != NULL)
  {
   /*
    * Found it, return the cached string...
    */

    item->ref_count ++;

#ifdef DEBUG_GUARDS
    DEBUG_printf(("5_cupsStrAlloc: Using string %p(%s) for \"%s\", guard=%08x, "
                  "ref_count=%d", item, item->str, s, item->guard,
		  item->ref_count));

    if (item->guard != _CUPS_STR_GUARD)
      abort();
#endif /* DEBUG_GUARDS */

    _cupsMutexUnlock(&sp_mutex);

    return (item->str);
  }