wmemmove.c revision e8031f0a8ed0e45c6d8847c5e09424e66fd34a4b
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "synonyms.h"
#include <sys/types.h>
#include <wchar.h>
#include <limits.h>
#include <string.h>
#include "libc.h"
wchar_t *
wmemmove(wchar_t *ws1, const wchar_t *ws2, size_t n)
{
wchar_t *ows1;
size_t max = SIZE_MAX / sizeof (wchar_t);
if (n <= max) {
return ((wchar_t *)memmove((void *)ws1,
(const void *)ws2, n * sizeof (wchar_t)));
}
ows1 = ws1;
if (n != 0) {
if (ws1 <= ws2) {
do {
*ws1++ = *ws2++;
} while (--n != 0);
} else {
ws2 += n;
ws1 += n;
do {
*--ws1 = *--ws2;
} while (--n != 0);
}
}
return (ows1);
}