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/*
* Copyright (C) 2009 Red Hat, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and its documentation for any purpose, provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software.
*
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* Red Hat Author(s): Behdad Esfahbod
*/
#include "hb-private.h"
#include "hb-language.h"
HB_BEGIN_DECLS
static const char canon_map[256] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, '-', 0, 0,
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 0, 0, 0, 0, 0, 0,
'-', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 0, 0, 0, 0, '-',
0, 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 0, 0, 0, 0, 0
};
static hb_bool_t
lang_equal (const void *v1,
const void *v2)
{
const unsigned char *p1 = v1;
const unsigned char *p2 = v2;
while (canon_map[*p1] && canon_map[*p1] == canon_map[*p2])
{
p1++, p2++;
}
return (canon_map[*p1] == canon_map[*p2]);
}
#if 0
static unsigned int
lang_hash (const void *key)
{
const unsigned char *p = key;
unsigned int h = 0;
while (canon_map[*p])
{
h = (h << 5) - h + canon_map[*p];
p++;
}
return h;
}
#endif
hb_language_t
hb_language_from_string (const char *str)
{
static unsigned int num_langs;
static unsigned int num_alloced;
static const char **langs;
unsigned int i;
unsigned char *p;
/* TODO Use a hash table or something */
if (!str)
return NULL;
for (i = 0; i < num_langs; i++)
if (lang_equal (str, langs[i]))
return langs[i];
if (unlikely (num_langs == num_alloced)) {
unsigned int new_alloced = 2 * (8 + num_alloced);
const char **new_langs = realloc (langs, new_alloced * sizeof (langs[0]));
if (!new_langs)
return NULL;
num_alloced = new_alloced;
langs = new_langs;
}
langs[i] = strdup (str);
for (p = (unsigned char *) langs[i]; *p; p++)
*p = canon_map[*p];
num_langs++;
return (hb_language_t) langs[i];
}
const char *
hb_language_to_string (hb_language_t language)
{
return (const char *) language;
}
HB_END_DECLS
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