stdlib/wcstombs.c

   1 /* Copyright (C) 1991,1992,1995,1996,1997,1999 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 Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    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    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #include <stdlib.h>
  20 #include <string.h>
  21 #include <wchar.h>
  22
  23
  24 /* Convert the `wchar_t' string in PWCS to a multibyte character string
  25    in S, writing no more than N characters.  Return the number of bytes
  26    written, or (size_t) -1 if an invalid `wchar_t' was found.  */
  27 size_t
  28 wcstombs (char *s, const wchar_t *pwcs, size_t n)
  29 {
  30   mbstate_t state;
  31
  32   memset (&state, '\0', sizeof state);
  33
  34   /* Return how many we wrote (or maybe an error).  */
  35   return __wcsrtombs (s, &pwcs, n, &state);
  36 }