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#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29#include "lint.h"
30#include <sys/types.h>
31#include <wchar.h>
32#include <limits.h>
33#include <string.h>
34#include "libc.h"
35
36wchar_t *
37wmemmove(wchar_t *ws1, const wchar_t *ws2, size_t n)
38{
39	wchar_t	*ows1;
40	size_t	max = SIZE_MAX / sizeof (wchar_t);
41
42	if (n <= max) {
43		return ((wchar_t *)memmove((void *)ws1,
44		    (const void *)ws2, n * sizeof (wchar_t)));
45	}
46
47	ows1 = ws1;
48	if (n != 0) {
49		if (ws1 <= ws2) {
50			do {
51				*ws1++ = *ws2++;
52			} while (--n != 0);
53		} else {
54			ws2 += n;
55			ws1 += n;
56			do {
57				*--ws1 = *--ws2;
58			} while (--n != 0);
59		}
60	}
61	return (ows1);
62}
63