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 #include "lint.h"
28 #include <sys/types.h>
29 #include <wchar.h>
30 #include <limits.h>
31 #include <string.h>
32 #include "libc.h"
33
34 wchar_t *
wmemmove(wchar_t * ws1,const wchar_t * ws2,size_t n)35 wmemmove(wchar_t *ws1, const wchar_t *ws2, size_t n)
36 {
37 wchar_t *ows1;
38 size_t max = SIZE_MAX / sizeof (wchar_t);
39
40 if (n <= max) {
41 return ((wchar_t *)memmove((void *)ws1,
42 (const void *)ws2, n * sizeof (wchar_t)));
43 }
44
45 ows1 = ws1;
46 if (n != 0) {
47 if (ws1 <= ws2) {
48 do {
49 *ws1++ = *ws2++;
50 } while (--n != 0);
51 } else {
52 ws2 += n;
53 ws1 += n;
54 do {
55 *--ws1 = *--ws2;
56 } while (--n != 0);
57 }
58 }
59 return (ows1);
60 }
61