xref: /freebsd/lib/libc/locale/c32rtomb.c (revision 4543ef516683042d46f3bd3bb8a4f3f746e00499)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
3  *
4  * Copyright (c) 2013 Ed Schouten <ed@FreeBSD.org>
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 <errno.h>
30 #include <uchar.h>
31 #include <wchar.h>
32 #include "mblocal.h"
33 
34 size_t
35 c32rtomb_l(char * __restrict s, char32_t c32, mbstate_t * __restrict ps,
36     locale_t locale)
37 {
38 
39 	/* Unicode Standard 5.0, D90: ill-formed characters. */
40 	if ((c32 >= 0xd800 && c32 <= 0xdfff) || c32 > 0x10ffff) {
41 		errno = EILSEQ;
42 		return ((size_t)-1);
43 	}
44 
45 	FIX_LOCALE(locale);
46 	if (ps == NULL)
47 		ps = &(XLOCALE_CTYPE(locale)->c32rtomb);
48 
49 	/* Assume wchar_t uses UTF-32. */
50 	return (wcrtomb_l(s, c32, ps, locale));
51 }
52 
53 size_t
54 c32rtomb(char * __restrict s, char32_t c32, mbstate_t * __restrict ps)
55 {
56 
57 	return (c32rtomb_l(s, c32, ps, __get_locale()));
58 }
59