snprintf/mbrtowc_sb.c

   1 /*      $OpenBSD: mbrtowc_sb.c,v 1.4 2005/11/27 20:03:06 cloder Exp $   */
   2 /*      $NetBSD: multibyte_sb.c,v 1.4 2003/08/07 16:43:04 agc Exp $     */
   3
   4 /*
   5  * Copyright (c) 1991 The Regents of the University of California.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #include <errno.h>
  34 #include <stdlib.h>
  35 #include <wchar.h>
  36
  37 /*ARGSUSED*/
  38 size_t
  39 ust_safe_mbrtowc(wchar_t *pwc, const char *s, size_t n, mbstate_t *ps)
  40 {
  41
  42         /* pwc may be NULL */
  43         /* s may be NULL */
  44         /* ps appears to be unused */
  45
  46         if (s == NULL)
  47                 return 0;
  48         if (n == 0)
  49                 return (size_t)-1;
  50         if (pwc)
  51                 *pwc = (wchar_t)(unsigned char)*s;
  52         return (*s != '\0');
  53 }