/* Convert wide character to multibyte character.

   Copyright (C) 2008-2017 Free Software Foundation, Inc.

   Written by Bruno Haible <bruno@clisp.org>, 2008.

   This program is free software: you can redistribute it and/or modify

   it under the terms of the GNU Lesser General Public License as published by

   the Free Software Foundation; either version 3 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License

   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include <config.h>

/* Specification.  */

#include <wchar.h>

#include <errno.h>

#include <stdlib.h>

size_t

wcrtomb (char *s, wchar_t wc, mbstate_t *ps)

{

  /* This implementation of wcrtomb on top of wctomb() supports only

     stateless encodings.  ps must be in the initial state.  */

  if (ps != NULL && !mbsinit (ps))

    {

      errno = EINVAL;

      return (size_t)(-1);

    }

  if (s == NULL)

    /* We know the NUL wide character corresponds to the NUL character.  */

    return 1;

  else

    {

      int ret = wctomb (s, wc);

      if (ret >= 0)

        return ret;

      else

        {

          errno = EILSEQ;

          return (size_t)(-1);

        }

    }

}