1  /* Map wide character using given mapping.
       2     Copyright (C) 1996-2023 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)