wctype/wctype.c

   1 /* Copyright (C) 1996-2023 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 <string.h>
  20 #include <wctype.h>
  21 #include <locale/localeinfo.h>
  22
  23 wctype_t
  24 __wctype (const char *property)
  25 {
  26   const char *names;
  27   unsigned int result;
  28   size_t proplen = strlen (property);
  29   size_t i;
  30
  31   names = _NL_CURRENT (LC_CTYPE, _NL_CTYPE_CLASS_NAMES);
  32   for (result = 0; ; result++)
  33     {
  34       size_t nameslen = strlen (names);
  35
  36       if (proplen == nameslen && memcmp (property, names, proplen) == 0)
  37         break;
  38
  39       names += nameslen + 1;
  40       if (names[0] == '\0')
  41         return 0;
  42     }
  43
  44   i = _NL_CURRENT_WORD (LC_CTYPE, _NL_CTYPE_CLASS_OFFSET) + result;
  45   return (wctype_t) _NL_CURRENT_DATA (LC_CTYPE)->values[i].string;
  46 }
  47 weak_alias (__wctype, wctype)