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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 "@(#)gzip.c 1.1 07/03/22 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 | ||
39 | size_t | |
40 | gzip_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*/ | |
58 | int | |
59 | gzip_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 | } |