]> git.saurik.com Git - apple/libc.git/blob - locale/FreeBSD/btowc.c
Libc-1439.100.3.tar.gz
[apple/libc.git] / locale / FreeBSD / btowc.c
1 /*-
2 * Copyright (c) 2002, 2003 Tim J. Robbins.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: src/lib/libc/locale/btowc.c,v 1.4 2004/05/12 14:26:54 tjr Exp $");
29
30 #include "xlocale_private.h"
31
32 #include <stdio.h>
33 #include <wchar.h>
34 #include "mblocal.h"
35
36 wint_t
37 btowc_l(int c, locale_t loc)
38 {
39 static const mbstate_t initial;
40 mbstate_t mbs = initial;
41 char cc;
42 wchar_t wc;
43
44 NORMALIZE_LOCALE(loc);
45 if (c == EOF)
46 return (WEOF);
47 /*
48 * We expect mbrtowc() to return 0 or 1, hence the check for n > 1
49 * which detects error return values as well as "impossible" byte
50 * counts.
51 */
52 cc = (char)c;
53 if (loc->__lc_ctype->__mbrtowc(&wc, &cc, 1, &mbs, loc) > 1)
54 return (WEOF);
55 return (wc);
56 }
57
58 wint_t
59 btowc(int c)
60 {
61 return btowc_l(c, __current_locale());
62 }