/*

 * 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 2007 Sun Microsystems, Inc.  All rights reserved.

 * Use is subject to license terms.

 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

#include <sys/debug.h>

#include <sys/types.h>

#include <sys/zmod.h>

#ifdef _KERNEL

#include <sys/systm.h>

#else

#include <strings.h>

#endif

size_t

gzip_compress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n)

{

	size_t dstlen = d_len;

	ASSERT(d_len <= s_len);

	if (z_compress_level(d_start, &dstlen, s_start, s_len, n) != Z_OK) {

		if (d_len != s_len)

			return (s_len);

		bcopy(s_start, d_start, s_len);

		return (s_len);

	}

	return (dstlen);

}

/*ARGSUSED*/

int

gzip_decompress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n)

{

	size_t dstlen = d_len;

	ASSERT(d_len >= s_len);

	if (z_uncompress(d_start, &dstlen, s_start, s_len) != Z_OK)

		return (-1);

	return (0);

}