memccpy.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* 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 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#ifndef _KMDB
#pragma weak memccpy = _memccpy
#include "synonyms.h"
#endif /* !_KMDB */
#include <sys/types.h>
#include <string.h>
#include <stddef.h>
#include <memory.h>
/*
* Copy s0 to s, stopping if character c is copied. Copy no more than n bytes.
* Return a pointer to the byte after character c in the copy,
* or NULL if c is not found in the first n bytes.
*/
void *
memccpy(void *s, const void *s0, int c, size_t n)
{
if (n != 0) {
unsigned char *s1 = s;
const unsigned char *s2 = s0;
do {
if ((*s1++ = *s2++) == (unsigned char)c)
return (s1);
} while (--n != 0);
}
return (NULL);
}