1 /*-
2 * Copyright (c) 2002-2004 Tim J. Robbins.
3 * All rights reserved.
4 *
5 * Copyright (c) 2011 The FreeBSD Foundation
6 * All rights reserved.
7 * Portions of this software were developed by David Chisnall
8 * under sponsorship from the FreeBSD Foundation.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * $FreeBSD: head/lib/libc/locale/mblen.c 227753 2011-11-20 14:45:42Z theraven $
32 */
33
34
35 #include <stdlib.h>
36 #include <wchar.h>
37 #include "mblocal.h"
38
39 int
mblen_l(const char * s,size_t n,locale_t locale)40 mblen_l(const char *s, size_t n, locale_t locale)
41 {
42 static const mbstate_t initial;
43 size_t rval;
44 FIX_LOCALE(locale);
45
46 if (s == NULL) {
47 /* No support for state dependent encodings. */
48 locale->mblen = initial;
49 return (0);
50 }
51 rval = XLOCALE_CTYPE(locale)->__mbrtowc(NULL, s, n, &locale->mblen);
52 if (rval == (size_t)-1 || rval == (size_t)-2)
53 return (-1);
54 return ((int)rval);
55 }
56
57 int
mblen(const char * s,size_t n)58 mblen(const char *s, size_t n)
59 {
60 return mblen_l(s, n, __get_locale());
61 }
62