xref: /titanic_41/usr/src/lib/libc/port/locale/mbtowc.c (revision 5e2c3ae0c70f6eb4a42ae670882aabac983cb5f1)
1 /*
2  * Copyright 2014 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 
36 int
37 mbtowc_l(wchar_t *_RESTRICT_KYWD pwc, const char *_RESTRICT_KYWD s, size_t n,
38     locale_t loc)
39 {
40 	mbstate_t mbs = { 0 };
41 	size_t rval;
42 
43 	if (s == NULL) {
44 		/* No support for state dependent encodings. */
45 		return (0);
46 	}
47 	rval = mbrtowc_l(pwc, s, n, &mbs, loc);
48 	if (rval == (size_t)-1 || rval == (size_t)-2)
49 		return (-1);
50 	return ((int)rval);
51 }
52 
53 int
54 mbtowc(wchar_t *_RESTRICT_KYWD pwc, const char *_RESTRICT_KYWD s, size_t n)
55 {
56 	return (mbtowc_l(pwc, s, n, uselocale(NULL)));
57 }
58