1 /*
   2  * Copyright 2013 Garrett D'Amore <garrett@damore.org>
   3  * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
   4  * Copyright (c) 2002, 2003 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 <stdio.h>
  31 #include <wchar.h>
  32 #include <locale.h>
  33 #include <xlocale.h>
  34 #include "mblocal.h"
  35 
  36 wint_t
  37 btowc_l(int c, locale_t loc)
  38 {
  39         static const mbstate_t initial = { 0 };
  40         mbstate_t mbs = initial;
  41         char cc;
  42         wchar_t wc;
  43 
  44         if (c == EOF)
  45                 return (WEOF);
  46         /*
  47          * We expect mbrtowc() to return 0 or 1, hence the check for n > 1
  48          * which detects error return values as well as "impossible" byte
  49          * counts.
  50          */
  51         cc = (char)c;
  52         if (mbrtowc_l(&wc, &cc, 1, &mbs, loc) > 1)
  53                 return (WEOF);
  54         return (wc);
  55 }
  56 
  57 wint_t
  58 btowc(int c)
  59 {
  60         return (btowc_l(c, uselocale(NULL)));
  61 }