decompressor.h revision 87bf54bb
1#ifndef DECOMPRESSOR_H
2#define DECOMPRESSOR_H
3/*
4 * Squashfs - a compressed read only filesystem for Linux
5 *
6 * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
7 * Phillip Lougher <phillip@squashfs.org.uk>
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version 2,
12 * or (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
22 *
23 * decompressor.h
24 */
25
26struct squashfs_decompressor {
27	void	*(*init)(struct squashfs_sb_info *, void *);
28	void	*(*comp_opts)(struct squashfs_sb_info *, void *, int);
29	void	(*free)(void *);
30	int	(*decompress)(struct squashfs_sb_info *, void *,
31		struct buffer_head **, int, int, int,
32		struct squashfs_page_actor *);
33	int	id;
34	char	*name;
35	int	supported;
36};
37
38static inline void *squashfs_comp_opts(struct squashfs_sb_info *msblk,
39							void *buff, int length)
40{
41	return msblk->decompressor->comp_opts ?
42		msblk->decompressor->comp_opts(msblk, buff, length) : NULL;
43}
44
45#ifdef CONFIG_SQUASHFS_XZ
46extern const struct squashfs_decompressor squashfs_xz_comp_ops;
47#endif
48
49#ifdef CONFIG_SQUASHFS_LZ4
50extern const struct squashfs_decompressor squashfs_lz4_comp_ops;
51#endif
52
53#ifdef CONFIG_SQUASHFS_LZO
54extern const struct squashfs_decompressor squashfs_lzo_comp_ops;
55#endif
56
57#ifdef CONFIG_SQUASHFS_ZLIB
58extern const struct squashfs_decompressor squashfs_zlib_comp_ops;
59#endif
60
61#ifdef CONFIG_SQUASHFS_ZSTD
62extern const struct squashfs_decompressor squashfs_zstd_comp_ops;
63#endif
64
65#endif
66