1/* Convert wide character to multibyte character.
2   Copyright (C) 2008-2014 Free Software Foundation, Inc.
3   Written by Bruno Haible <bruno@clisp.org>, 2008.
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 <http://www.gnu.org/licenses/>.  */
17
18#include <config.h>
19
20/* Specification.  */
21#include <wchar.h>
22
23#include <errno.h>
24#include <stdlib.h>
25
26
27size_t
28wcrtomb (char *s, wchar_t wc, mbstate_t *ps)
29{
30  /* This implementation of wcrtomb on top of wctomb() supports only
31     stateless encodings.  ps must be in the initial state.  */
32  if (ps != NULL && !mbsinit (ps))
33    {
34      errno = EINVAL;
35      return (size_t)(-1);
36    }
37
38  if (s == NULL)
39    /* We know the NUL wide character corresponds to the NUL character.  */
40    return 1;
41  else
42    {
43      int ret = wctomb (s, wc);
44
45      if (ret >= 0)
46        return ret;
47      else
48        {
49          errno = EILSEQ;
50          return (size_t)(-1);
51        }
52    }
53}
54