1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29#include <sys/debug.h>
30#include <sys/types.h>
31#include <sys/zmod.h>
32
33#ifdef _KERNEL
34#include <sys/systm.h>
35#else
36#include <strings.h>
37#endif
38
39size_t
40gzip_compress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n)
41{
42	size_t dstlen = d_len;
43
44	ASSERT(d_len <= s_len);
45
46	if (z_compress_level(d_start, &dstlen, s_start, s_len, n) != Z_OK) {
47		if (d_len != s_len)
48			return (s_len);
49
50		bcopy(s_start, d_start, s_len);
51		return (s_len);
52	}
53
54	return (dstlen);
55}
56
57/*ARGSUSED*/
58int
59gzip_decompress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n)
60{
61	size_t dstlen = d_len;
62
63	ASSERT(d_len >= s_len);
64
65	if (z_uncompress(d_start, &dstlen, s_start, s_len) != Z_OK)
66		return (-1);
67
68	return (0);
69}
70