.
[glibc/history.git] / stdlib / wctomb.c
blob49872f5c6b52506a858705ad55c086fc44e8cc86
1 /* Copyright (C) 1991, 1992, 1995-1999, 2002 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 02111-1307 USA. */
19 #include <stdlib.h>
20 #include <string.h>
21 #include <wchar.h>
22 #include <gconv.h>
23 #include <wcsmbs/wcsmbsload.h>
26 extern mbstate_t __no_r_state attribute_hidden; /* Defined in mbtowc.c. */
28 /* Convert WCHAR into its multibyte character representation,
29 putting this in S and returning its length.
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'. */
35 int
36 wctomb (char *s, wchar_t wchar)
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)
43 const struct gconv_fcts *fcts;
45 /* Get the conversion functions. */
46 fcts = get_gconv_fcts (_NL_CURRENT_DATA (LC_CTYPE));
48 /* This is an extension in the Unix standard which does not directly
49 violate ISO C. */
50 memset (&__no_r_state, '\0', sizeof __no_r_state);
52 return fcts->tomb->__stateful;
55 return __wcrtomb (s, wchar, &__no_r_state);
57 libc_hidden_def (wctomb)