wmemcpy.c revision 1219:f89f56c2d9ac 
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, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22
23/*
24 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
25 * Use is subject to license terms.
26 */
27
28#pragma ident	"%Z%%M%	%I%	%E% SMI"
29
30#include "synonyms.h"
31#include <sys/types.h>
32#include <wchar.h>
33#include <limits.h>
34#include <string.h>
35#include "libc.h"
36
37wchar_t *
38wmemcpy(wchar_t *ws1, const wchar_t *ws2, size_t n)
39{
40	wchar_t	*p1, *p2;
41	size_t	len;
42	size_t	max = SIZE_MAX / sizeof (wchar_t);
43
44	if (n <= max) {
45		return ((wchar_t *)memcpy((void *)ws1,
46			(const void *)ws2, n * sizeof (wchar_t)));
47	}
48
49	p1 = ws1;
50	p2 = (wchar_t *)ws2;
51	do {
52		if (n > max) {
53			len = max;
54		} else {
55			len = n;
56		}
57		(void) memcpy((void *)p1,
58			(const void *)p2, len * sizeof (wchar_t));
59		n = n - len;
60		p1 += len;
61		p2 += len;
62	} while (n != 0);
63	return (ws1);
64}
65