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 |
36 | extern "C" { |
37 | #endif |
38 | |
39 | /* Common signature for all zio compress functions. */ |
40 | typedef 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. */ |
43 | typedef 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 | */ |
49 | typedef 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 | |
56 | extern zio_compress_info_t zio_compress_table[ZIO_COMPRESS_FUNCTIONS]; |
57 | |
58 | /* |
59 | * Compression routines. |
60 | */ |
61 | extern size_t lzjb_compress(void *src, void *dst, size_t s_len, size_t d_len, |
62 | int level); |
63 | extern int lzjb_decompress(void *src, void *dst, size_t s_len, size_t d_len, |
64 | int level); |
65 | extern size_t gzip_compress(void *src, void *dst, size_t s_len, size_t d_len, |
66 | int level); |
67 | extern int gzip_decompress(void *src, void *dst, size_t s_len, size_t d_len, |
68 | int level); |
69 | extern size_t zle_compress(void *src, void *dst, size_t s_len, size_t d_len, |
70 | int level); |
71 | extern int zle_decompress(void *src, void *dst, size_t s_len, size_t d_len, |
72 | int level); |
73 | #ifdef __FreeBSD__ |
74 | extern void lz4_init(void); |
75 | extern void lz4_fini(void); |
76 | #else |
77 | #define lz4_init() /* nothing */ |
78 | #define lz4_fini() /* nothing */ |
79 | #endif |
80 | extern size_t lz4_compress(void *src, void *dst, size_t s_len, size_t d_len, |
81 | int level); |
82 | extern 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 | */ |
88 | extern size_t zio_compress_data(enum zio_compress c, void *src, void *dst, |
89 | size_t s_len); |
90 | extern 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 | */ |
96 | extern void zio_compress_init(void); |
97 | extern void zio_compress_fini(void); |
98 | |
99 | #ifdef __cplusplus |
100 | } |
101 | #endif |
102 | |
103 | #endif /* _SYS_ZIO_COMPRESS_H */ |
104 | |