wctype/wctype_l.c

   1 /* Copyright (C) 1996-2021 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <endian.h>
  19 #include <locale.h>
  20 #include <string.h>
  21 #include <wctype.h>
  22 #include <locale/localeinfo.h>
  23
  24 wctype_t
  25 __wctype_l (const char *property, locale_t locale)
  26 {
  27   const char *names;
  28   unsigned int result;
  29   size_t proplen = strlen (property);
  30   size_t i;
  31
  32   names = locale->__locales[LC_CTYPE]->values[_NL_ITEM_INDEX (_NL_CTYPE_CLASS_NAMES)].string;
  33   for (result = 0; ; result++)
  34     {
  35       size_t nameslen = strlen (names);
  36
  37       if (proplen == nameslen && memcmp (property, names, proplen) == 0)
  38         break;
  39
  40       names += nameslen + 1;
  41       if (names[0] == '\0')
  42         return 0;
  43     }
  44
  45   i = locale->__locales[LC_CTYPE]->values[_NL_ITEM_INDEX (_NL_CTYPE_CLASS_OFFSET)].word + result;
  46   return (wctype_t) locale->__locales[LC_CTYPE]->values[i].string;
  47 }
  48 weak_alias (__wctype_l, wctype_l)