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 #include <sys/debug.h>
28 #include <sys/types.h>
29 #include <sys/zmod.h>
30
31 #ifdef _KERNEL
32 #include <sys/systm.h>
33 #else
34 #include <strings.h>
35 #endif
36
37 size_t
gzip_compress(void * s_start,void * d_start,size_t s_len,size_t d_len,int n)38 gzip_compress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n)
39 {
40 size_t dstlen = d_len;
41
42 ASSERT(d_len <= s_len);
43
44 if (z_compress_level(d_start, &dstlen, s_start, s_len, n) != Z_OK) {
45 if (d_len != s_len)
46 return (s_len);
47
48 bcopy(s_start, d_start, s_len);
49 return (s_len);
50 }
51
52 return (dstlen);
53 }
54
55 /*ARGSUSED*/
56 int
gzip_decompress(void * s_start,void * d_start,size_t s_len,size_t d_len,int n)57 gzip_decompress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n)
58 {
59 size_t dstlen = d_len;
60
61 ASSERT(d_len >= s_len);
62
63 if (z_uncompress(d_start, &dstlen, s_start, s_len) != Z_OK)
64 return (-1);
65
66 return (0);
67 }
68