1/* Copyright (C) 1991-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <stdlib.h>
19#include <string.h>
20#include <wchar.h>
21#include <gconv.h>
22#include <wcsmbs/wcsmbsload.h>
23
24
25/* Shared with __wctomb_chk. */
26mbstate_t __wctomb_state attribute_hidden;
27
28/* Convert WCHAR into its multibyte character representation,
29 putting this in S and returning its length.
30
31 Attention: this function should NEVER be intentionally used.
32 The interface is completely stupid. The state is shared between
33 all conversion functions. You should use instead the restartable
34 version `wcrtomb'. */
35int
36wctomb (char *s, wchar_t wchar)
37{
38 /* If S is NULL the function has to return null or not null
39 depending on the encoding having a state depending encoding or
40 not. */
41 if (s == NULL)
42 {
43 const struct gconv_fcts *fcts;
44
45 /* Get the conversion functions. */
46 fcts = get_gconv_fcts (_NL_CURRENT_DATA (LC_CTYPE));
47
48 /* This is an extension in the Unix standard which does not directly
49 violate ISO C. */
50 memset (&__wctomb_state, '\0', sizeof __wctomb_state);
51
52 return fcts->tomb->__stateful;
53 }
54
55 return __wcrtomb (s, wchar, &__wctomb_state);
56}
57libc_hidden_def (wctomb)
58