wctype/iswctype_l.c

   1 /* Copyright (C) 1996, 1997, 2000 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #include <ctype.h>
  21 #include <wctype.h>
  22
  23 #define USE_IN_EXTENDED_LOCALE_MODEL    1
  24 #include "cname-lookup.h"
  25 #include "wchar-lookup.h"
  26
  27
  28 int
  29 __iswctype_l (wint_t wc, wctype_t desc, __locale_t locale)
  30 {
  31   if (locale->__locales[LC_CTYPE]->values[_NL_ITEM_INDEX (_NL_CTYPE_HASH_SIZE)].word != 0)
  32     {
  33       /* Old locale format.  */
  34       const uint32_t *class32_b;
  35       size_t idx;
  36
  37       idx = cname_lookup (wc, locale);
  38       if (idx == ~((size_t) 0))
  39         return 0;
  40
  41       class32_b = (uint32_t *)
  42         locale->__locales[LC_CTYPE]->values[_NL_ITEM_INDEX (_NL_CTYPE_CLASS32)].string;
  43
  44       return class32_b[idx] & desc;
  45     }
  46   else
  47     {
  48       /* If the user passes in an invalid DESC valid (the one returned from
  49          `__wctype_l' in case of an error) simply return 0.  */
  50       if (desc == (wctype_t) 0)
  51         return 0;
  52
  53       /* New locale format.  */
  54       return wctype_table_lookup ((const char *) desc, wc);
  55     }
  56 }