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/* grecs - Gray's Extensible Configuration System
Copyright (C) 2007, 2008, 2009, 2010 Sergey Poznyakoff
Grecs is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
Grecs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with Grecs. If not, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <grecs.h>
#include <string.h>
#include <hash.h>
#include <xalloc.h>
static Hash_table *text_table;
/* Calculate the hash of a string. */
static size_t
text_hasher (void const *data, size_t n_buckets)
{
return hash_string (data, n_buckets);
}
/* Compare two strings for equality. */
static bool
text_compare (void const *data1, void const *data2)
{
return strcmp (data1, data2) == 0;
}
static void
text_free (void *data)
{
free (data);
}
/* Lookup a text. If it does not exist, create it. */
char *
grecs_install_text (const char *str)
{
char *text, *s;
s = xstrdup (str);
if (!((text_table
|| (text_table = hash_initialize (0, 0,
text_hasher,
text_compare,
text_free)))
&& (text = hash_insert (text_table, s))))
xalloc_die ();
if (s != text)
free (s);
return text;
}
void
grecs_destroy_text ()
{
if (text_table)
hash_free (text_table);
}
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