stdlib/mbstowcs.c

   1 /* Copyright (C) 1991, 1992, 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 string of multibyte characters in S to `wchar_t's in
  25    PWCS, writing no more than N.  Return the number written,
  26    or (size_t) -1 if an invalid multibyte character is encountered.
  27
  28    Attention: this function should NEVER be intentionally used.
  29    The interface is completely stupid.  The state is shared between
  30    all conversion functions.  You should use instead the restartable
  31    version `mbsrtowcs'.  */
  32 size_t
  33 mbstowcs (wchar_t *pwcs, const char *s, size_t n)
  34 {
  35   mbstate_t state;
  36
  37   memset (&state, '\0', sizeof state);
  38   /* Return how many we wrote (or maybe an error).  */
  39   return __mbsrtowcs (pwcs, &s, n, &state);
  40 }