wctype/wctype_l.c

   1 /* Copyright (C) 1996-2021 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@gnu.org>, 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 Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the 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    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <endian.h>
  20 #include <locale.h>
  21 #include <string.h>
  22 #include <wctype.h>
  23 #include <locale/localeinfo.h>
  24
  25 wctype_t
  26 __wctype_l (const char *property, locale_t locale)
  27 {
  28   const char *names;
  29   unsigned int result;
  30   size_t proplen = strlen (property);
  31   size_t i;
  32
  33   names = locale->__locales[LC_CTYPE]->values[_NL_ITEM_INDEX (_NL_CTYPE_CLASS_NAMES)].string;
  34   for (result = 0; ; result++)
  35     {
  36       size_t nameslen = strlen (names);
  37
  38       if (proplen == nameslen && memcmp (property, names, proplen) == 0)
  39         break;
  40
  41       names += nameslen + 1;
  42       if (names[0] == '\0')
  43         return 0;
  44     }
  45
  46   i = locale->__locales[LC_CTYPE]->values[_NL_ITEM_INDEX (_NL_CTYPE_CLASS_OFFSET)].word + result;
  47   return (wctype_t) locale->__locales[LC_CTYPE]->values[i].string;
  48 }
  49 weak_alias (__wctype_l, wctype_l)