memcpy.c revision 7257d1b4d25bfac0c802847390e98a464fd787ac
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (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 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* The SunStudio compiler may generate calls to _memcpy and so we
* need to make sure that the correct symbol exists for these calls,
* whether it be libc (first case below) or the kernel (second case).
*/
#if !defined(_KMDB) && !defined(_BOOT) && !defined(_KERNEL)
#include "lint.h"
#endif /* !_KMDB && !_BOOT && !_KERNEL */
#pragma weak _memcpy = memcpy
#include <sys/types.h>
#if defined(_KERNEL)
#include <sys/systm.h>
#elif !defined(_BOOT)
#include <stddef.h>
#include <string.h>
#endif
#include "memcpy.h"
/*
* Copy s0 to s, always copy n bytes.
* Return s
*/
void *
memcpy(void *s, const void *s0, size_t n)
{
if (n != 0) {
char *s1 = s;
const char *s2 = s0;
do {
*s1++ = *s2++;
} while (--n != 0);
}
return (s);
}