xref: /illumos-gate/usr/src/lib/libc/port/i18n/wsncat.c (revision 00ae59338e3e57fe8bfe8118360a47a69bfd8b98)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1986 AT&T	*/
28 /*	  All Rights Reserved	*/
29 
30 /*
31  * Concatenate s2 on the end of s1. S1's space must be large enough.
32  * At most n characters are moved.
33  * return s1.
34  */
35 
36 #pragma weak _wcsncat = wcsncat
37 #pragma weak _wsncat = wsncat
38 
39 #include "lint.h"
40 #include <stdlib.h>
41 #include <wchar.h>
42 
43 wchar_t *
wcsncat(wchar_t * s1,const wchar_t * s2,size_t n)44 wcsncat(wchar_t *s1, const wchar_t *s2, size_t n)
45 {
46 	wchar_t *os1 = s1;
47 
48 	while (*s1++) /* find end of s1 */
49 		;
50 	++n;
51 	--s1;
52 	while ((*s1++ = *s2++) != 0) /* copy s2 to s1 */
53 		if (--n == 0) {  /* at most n chars */
54 			*--s1 = 0;
55 			break;
56 		}
57 	return (os1);
58 }
59 
60 wchar_t *
wsncat(wchar_t * s1,const wchar_t * s2,size_t n)61 wsncat(wchar_t *s1, const wchar_t *s2, size_t n)
62 {
63 	return (wcsncat(s1, s2, n));
64 }
65