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 2009 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26/*
27 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
28 */
29
30#ifndef _SYS_ZIO_COMPRESS_H
31#define _SYS_ZIO_COMPRESS_H
32
33#include <sys/zio.h>
34
35#ifdef __cplusplus
36extern "C" {
37#endif
38
39/* Common signature for all zio compress functions. */
40typedef size_t zio_compress_func_t(void *src, void *dst,
41 size_t s_len, size_t d_len, int);
42/* Common signature for all zio decompress functions. */
43typedef int zio_decompress_func_t(void *src, void *dst,
44 size_t s_len, size_t d_len, int);
45
46/*
47 * Information about each compression function.
48 */
49typedef struct zio_compress_info {
50 zio_compress_func_t *ci_compress; /* compression function */
51 zio_decompress_func_t *ci_decompress; /* decompression function */
52 int ci_level; /* level parameter */
53 char *ci_name; /* algorithm name */
54} zio_compress_info_t;
55
56extern zio_compress_info_t zio_compress_table[ZIO_COMPRESS_FUNCTIONS];
57
58/*
59 * Compression routines.
60 */
61extern size_t lzjb_compress(void *src, void *dst, size_t s_len, size_t d_len,
62 int level);
63extern int lzjb_decompress(void *src, void *dst, size_t s_len, size_t d_len,
64 int level);
65extern size_t gzip_compress(void *src, void *dst, size_t s_len, size_t d_len,
66 int level);
67extern int gzip_decompress(void *src, void *dst, size_t s_len, size_t d_len,
68 int level);
69extern size_t zle_compress(void *src, void *dst, size_t s_len, size_t d_len,
70 int level);
71extern int zle_decompress(void *src, void *dst, size_t s_len, size_t d_len,
72 int level);
73#ifdef __FreeBSD__
74extern void lz4_init(void);
75extern void lz4_fini(void);
76#else
77#define lz4_init() /* nothing */
78#define lz4_fini() /* nothing */
79#endif
80extern size_t lz4_compress(void *src, void *dst, size_t s_len, size_t d_len,
81 int level);
82extern int lz4_decompress(void *src, void *dst, size_t s_len, size_t d_len,
83 int level);
84
85/*
86 * Compress and decompress data if necessary.
87 */
88extern size_t zio_compress_data(enum zio_compress c, void *src, void *dst,
89 size_t s_len);
90extern int zio_decompress_data(enum zio_compress c, void *src, void *dst,
91 size_t s_len, size_t d_len);
92
93/*
94 * Module lifetime management.
95 */
96extern void zio_compress_init(void);
97extern void zio_compress_fini(void);
98
99#ifdef __cplusplus
100}
101#endif
102
103#endif /* _SYS_ZIO_COMPRESS_H */
104