1 /*
   2  * Copyright 2013 Garrett D'Amore <garrett@damore.org>
   3  * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
   4  * Copyright (c) 2002-2004 Tim J. Robbins.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28 
  29 #include "lint.h"
  30 #include <stdlib.h>
  31 #include <wchar.h>
  32 #include <locale.h>
  33 #include <xlocale.h>
  34 #include "mblocal.h"
  35 #include "localeimpl.h"
  36 
  37 int
  38 mblen_l(const char *s, size_t n, locale_t loc)
  39 {
  40         static const mbstate_t initial = { 0 };
  41         static mbstate_t mbs;
  42         size_t rval;
  43 
  44         if (s == NULL) {
  45                 /* No support for state dependent encodings. */
  46                 mbs = initial;
  47                 return (0);
  48         }
  49         rval = mbrtowc_l(NULL, s, n, &mbs, loc);
  50         if (rval == (size_t)-1 || rval == (size_t)-2)
  51                 return (-1);
  52         return ((int)rval);
  53 }
  54 
  55 int
  56 mblen(const char *s, size_t n)
  57 {
  58         return (mblen_l(s, n, uselocale(NULL)));
  59 }