/*

 * 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"

/*

 * Swab bytes

 */

#pragma weak _swab = swab

#include "lint.h"

#include <sys/types.h>

#include <stdlib.h>

#define	STEP	(void)((temp = *from++), (*to++ = *from++), (*to++ = temp))

void

swab(const char *src, char *dest, ssize_t n)

{

	char temp;

	const char *from = (const char *)src;

	char *to = (char *)dest;

	if (n <= 1)

		return;

	n >>= 1; n++;

	/* round to multiple of 8 */

	while ((--n) & 07)

		STEP;

	n >>= 3;

	while (--n >= 0) {

		STEP; STEP; STEP; STEP;

		STEP; STEP; STEP; STEP;

	}

}