xref: /freebsd/lib/libc/string/wcsncat.c (revision d9f0ce31900a48d1a2bfc1c8c86f79d1e831451a)
1 /*-
2  * Copyright (c)1999 Citrus Project,
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  *	citrus Id: wcsncat.c,v 1.1 1999/12/29 21:47:45 tshiozak Exp
27  */
28 
29 #include <sys/cdefs.h>
30 #if 0
31 #if defined(LIBC_SCCS) && !defined(lint)
32 __RCSID("$NetBSD: wcsncat.c,v 1.1 2000/12/23 23:14:36 itojun Exp $");
33 #endif /* LIBC_SCCS and not lint */
34 #endif
35 __FBSDID("$FreeBSD$");
36 
37 #include <wchar.h>
38 
39 wchar_t *
40 wcsncat(wchar_t * __restrict s1, const wchar_t * __restrict s2, size_t n)
41 {
42 	wchar_t *p;
43 	wchar_t *q;
44 	const wchar_t *r;
45 
46 	p = s1;
47 	while (*p)
48 		p++;
49 	q = p;
50 	r = s2;
51 	while (n && *r) {
52 		*q++ = *r++;
53 		n--;
54 	}
55 	*q = '\0';
56 	return s1;
57 }
58