1  /* Convert wide character to multibyte character.
       2     Copyright (C) 2011-2021 Free Software Foundation, Inc.
       3     Written by Bruno Haible <bruno@clisp.org>, 2011.
       4  
       5     This program is free software: you can redistribute it and/or modify
       6     it under the terms of the GNU General Public License as published by
       7     the Free Software Foundation; either version 3 of the License, or
       8     (at your option) any later version.
       9  
      10     This program 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
      13     GNU General Public License for more details.
      14  
      15     You should have received a copy of the GNU General Public License
      16     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
      17  
      18  int
      19  wctomb (char *s, wchar_t wc)
      20  {
      21    if (s == NULL)
      22      return 0;
      23    else
      24      {
      25        mbstate_t state;
      26        size_t result;
      27  
      28        memset (&state, 0, sizeof (mbstate_t));
      29        result = wcrtomb (s, wc, &state);
      30        if (result == (size_t)-1)
      31          return -1;
      32        return result;
      33      }
      34  }