69 lines
2.4 KiB
C
69 lines
2.4 KiB
C
/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <endian.h>
|
|
#include "../locale/localeinfo.h"
|
|
|
|
/* Some words on the runtime of this functions. Although there is a
|
|
loop in the function the runtime is asymptotically quasi constant.
|
|
The reason is that even for the largest character sets HASH_LAYERS
|
|
will not grow beyond 15 (a guess!). */
|
|
#ifndef USE_IN_EXTENDED_LOCALE_MODEL
|
|
static __inline size_t
|
|
cname_lookup (wint_t wc)
|
|
#else
|
|
static __inline size_t
|
|
cname_lookup (wint_t wc, __locale_t locale)
|
|
#endif
|
|
{
|
|
unsigned int hash_size, hash_layers;
|
|
size_t result, cnt;
|
|
|
|
#ifndef USE_IN_EXTENDED_LOCALE_MODEL
|
|
extern unsigned int *__ctype_names;
|
|
hash_size = _NL_CURRENT_WORD (LC_CTYPE, _NL_CTYPE_HASH_SIZE);
|
|
hash_layers = _NL_CURRENT_WORD (LC_CTYPE, _NL_CTYPE_HASH_LAYERS);
|
|
#else
|
|
struct locale_data *current = locale->__locales[LC_CTYPE];
|
|
#if BYTE_ORDER == BIG_ENDIAN
|
|
unsigned int *__ctype_names =
|
|
(unsigned int *) current->values[_NL_ITEM_INDEX (_NL_CTYPE_NAMES_EB)].string;
|
|
#elif BYTE_ORDER == LITTLE_ENDIAN
|
|
unsigned int *__ctype_names =
|
|
(unsigned int *) current->values[_NL_ITEM_INDEX (_NL_CTYPE_NAMES_EL)].string;
|
|
#else
|
|
# error bizarre byte order
|
|
#endif
|
|
hash_size =
|
|
current->values[_NL_ITEM_INDEX (_NL_CTYPE_HASH_SIZE)].word;
|
|
hash_layers =
|
|
current->values[_NL_ITEM_INDEX (_NL_CTYPE_HASH_LAYERS)].word;
|
|
#endif
|
|
|
|
result = wc % hash_size;
|
|
for (cnt = 0; cnt < hash_layers; ++cnt)
|
|
{
|
|
if (__ctype_names[result] == wc)
|
|
break;
|
|
result += hash_size;
|
|
}
|
|
|
|
return cnt < hash_layers ? result : ~((size_t) 0);
|
|
}
|