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glibc  2.9
wcstombs.c
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00001 /* Copyright (C) 1991,1992,1995,1996,1997,1999 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <stdlib.h>
00020 #include <string.h>
00021 #include <wchar.h>
00022 
00023 
00024 /* Convert the `wchar_t' string in PWCS to a multibyte character string
00025    in S, writing no more than N characters.  Return the number of bytes
00026    written, or (size_t) -1 if an invalid `wchar_t' was found.  */
00027 size_t
00028 wcstombs (char *s, const wchar_t *pwcs, size_t n)
00029 {
00030   mbstate_t state;
00031 
00032   memset (&state, '\0', sizeof state);
00033 
00034   /* Return how many we wrote (or maybe an error).  */
00035   return __wcsrtombs (s, &pwcs, n, &state);
00036 }