wctype/towctrans.c

   1 /* Map wide character using given mapping.
   2    Copyright (C) 1996-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   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 <wctype.h>
  20
  21 /* Define the lookup function.  */
  22 #include "wchar-lookup.h"
  23
  24 wint_t
  25 __towctrans (wint_t wc, wctrans_t desc)
  26 {
  27   /* If the user passes in an invalid DESC valid (the one returned from
  28      `wctrans' in case of an error) simply return the value.  */
  29   if (desc == (wctrans_t) 0)
  30     return wc;
  31
  32   return wctrans_table_lookup ((const char *) desc, wc);
  33 }
  34 libc_hidden_def (__towctrans)
  35 weak_alias (__towctrans, towctrans)