/*

 * Copyright (c) 1988, 1993

 *	The Regents of the University of California.  All rights reserved.

 *

 * This code is derived from software contributed to Berkeley by

 * Jeffrey Mogul.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 4. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 *  © Portions copyright (c) 2005-2006  Nokia Corporation.  All rights reserved.

 */

#if defined(LIBC_SCCS) && !defined(lint)

static char sccsid[] = "@(#)swab.c	8.1 (Berkeley) 6/4/93";

#endif /* LIBC_SCCS and not lint */

#include <sys/cdefs.h>

#ifndef __SYMBIAN32__

__FBSDID("$FreeBSD: src/lib/libc/string/swab.c,v 1.6 2004/12/10 15:24:40 trhodes Exp $");

#endif

#include <unistd.h>

EXPORT_C 

void

swab(const void * __restrict from, void * __restrict to, ssize_t len)

{

	unsigned long temp;

	int n;

	char *fp, *tp;

	n = len >> 1;

	fp = (char *)from;

	tp = (char *)to;

#define	STEP	temp = *fp++,*tp++ = *fp++,*tp++ = temp

	/* round to multiple of 8 */

	for (; n & 0x7; --n)

		STEP;

	for (n >>= 3; n > 0; --n) {

		STEP; STEP; STEP; STEP;

		STEP; STEP; STEP; STEP;

	}

}