wctype/iswctype.c

   1 /* Copyright (C) 1996-2019 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>.
   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 <ctype.h>
  20 #include <wctype.h>
  21
  22 #include "wchar-lookup.h"
  23
  24 #undef __iswctype
  25
  26 int
  27 __iswctype (wint_t wc, wctype_t desc)
  28 {
  29   /* If the user passes in an invalid DESC valid (the one returned from
  30      `wctype' in case of an error) simply return 0.  */
  31   if (desc == (wctype_t) 0)
  32     return 0;
  33
  34   return wctype_table_lookup ((const char *) desc, wc);
  35 }
  36 libc_hidden_def (__iswctype)
  37 weak_alias (__iswctype, iswctype)