121 lines
3.2 KiB
C
121 lines
3.2 KiB
C
/*
|
|
* 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
|