xref: /freebsd/lib/libc/locale/wctob.c (revision dab4fca49b6e1a93ecf662f118fff6f9f0952f54)
1e9fb7011STim J. Robbins /*-
2dab4fca4STim J. Robbins  * Copyright (c) 2002, 2003 Tim J. Robbins.
3e9fb7011STim J. Robbins  * All rights reserved.
4e9fb7011STim J. Robbins  *
5e9fb7011STim J. Robbins  * Redistribution and use in source and binary forms, with or without
6e9fb7011STim J. Robbins  * modification, are permitted provided that the following conditions
7e9fb7011STim J. Robbins  * are met:
8e9fb7011STim J. Robbins  * 1. Redistributions of source code must retain the above copyright
9e9fb7011STim J. Robbins  *    notice, this list of conditions and the following disclaimer.
10e9fb7011STim J. Robbins  * 2. Redistributions in binary form must reproduce the above copyright
11e9fb7011STim J. Robbins  *    notice, this list of conditions and the following disclaimer in the
12e9fb7011STim J. Robbins  *    documentation and/or other materials provided with the distribution.
13e9fb7011STim J. Robbins  *
14e9fb7011STim J. Robbins  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15e9fb7011STim J. Robbins  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16e9fb7011STim J. Robbins  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17e9fb7011STim J. Robbins  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18e9fb7011STim J. Robbins  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19e9fb7011STim J. Robbins  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20e9fb7011STim J. Robbins  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21e9fb7011STim J. Robbins  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22e9fb7011STim J. Robbins  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23e9fb7011STim J. Robbins  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24e9fb7011STim J. Robbins  * SUCH DAMAGE.
25e9fb7011STim J. Robbins  */
26e9fb7011STim J. Robbins 
27e9fb7011STim J. Robbins #include <sys/cdefs.h>
28e9fb7011STim J. Robbins __FBSDID("$FreeBSD$");
29e9fb7011STim J. Robbins 
30dab4fca4STim J. Robbins #include <limits.h>
31dab4fca4STim J. Robbins #include <stdio.h>
32dab4fca4STim J. Robbins #include <string.h>
33e9fb7011STim J. Robbins #include <wchar.h>
34e9fb7011STim J. Robbins 
35e9fb7011STim J. Robbins int
36e9fb7011STim J. Robbins wctob(wint_t c)
37e9fb7011STim J. Robbins {
38dab4fca4STim J. Robbins 	char buf[MB_LEN_MAX];
39e9fb7011STim J. Robbins 
40dab4fca4STim J. Robbins 	/*
41dab4fca4STim J. Robbins 	 * We pass NULL as the state pointer to wcrtomb() because we don't
42dab4fca4STim J. Robbins 	 * support state-dependent encodings and don't want to waste time
43dab4fca4STim J. Robbins 	 * creating a zeroed mbstate_t that will not be used.
44dab4fca4STim J. Robbins 	 */
45dab4fca4STim J. Robbins 	if (c == WEOF || wcrtomb(buf, c, NULL) != 1)
46e9fb7011STim J. Robbins 		return (EOF);
47dab4fca4STim J. Robbins 	return ((unsigned char)*buf);
48e9fb7011STim J. Robbins }
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