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 */
40 wchar_t *
wcsncpy(wchar_t * s1,const wchar_t * s2,size_t n)41 wcsncpy(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
54 wchar_t *
wsncpy(wchar_t * s1,const wchar_t * s2,size_t n)55 wsncpy(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 */
64 wchar_t *
wcpncpy(wchar_t * s1,const wchar_t * s2,size_t n)65 wcpncpy(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