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 (c) 1990, 2010, Oracle and/or its affiliates. All rights reserved.
24 */
25
26/*	Copyright (c) 1986 AT&T	*/
27/*	  All Rights Reserved  	*/
28
29#pragma weak _wcsncpy = wcsncpy
30#pragma weak _wsncpy = wsncpy
31
32#include "lint.h"
33#include <stdlib.h>
34#include <wchar.h>
35
36/*
37 * Copy s2 to s1, truncating or null-padding to always copy n
38 * wide-character codes.  Return s1.
39 */
40wchar_t *
41wcsncpy(wchar_t *s1, const wchar_t *s2, size_t n)
42{
43	wchar_t *os1 = s1;
44
45	n++;
46	while (--n > 0 && (*s1++ = *s2++) != 0)
47		continue;
48	if (n > 0)
49		while (--n > 0)
50			*s1++ = 0;
51	return (os1);
52}
53
54wchar_t *
55wsncpy(wchar_t *s1, const wchar_t *s2, size_t n)
56{
57	return (wcsncpy(s1, s2, n));
58}
59
60/*
61 * Same as wcsncpy(), except return a pointer to the terminating null
62 * wide-character code in s1, or, if s1 is not null-terminated, s1 + n.
63 */
64wchar_t *
65wcpncpy(wchar_t *s1, const wchar_t *s2, size_t n)
66{
67	wchar_t *os1 = s1;
68
69	n++;
70	while (--n != 0) {
71		if ((*s1++ = *s2++) == 0) {
72			os1 = s1 - 1;
73			break;
74		}
75		os1 = s1;
76	}
77	if (n != 0)
78		while (--n != 0)
79			*s1++ = 0;
80	return (os1);
81}
82