decompressor.h revision 9508c6b9
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 *, void **,
31		struct buffer_head **, int, int, int, int, int);
32	int	id;
33	char	*name;
34	int	supported;
35};
36
37static inline void *squashfs_comp_opts(struct squashfs_sb_info *msblk,
38							void *buff, int length)
39{
40	return msblk->decompressor->comp_opts ?
41		msblk->decompressor->comp_opts(msblk, buff, length) : NULL;
42}
43
44#ifdef CONFIG_SQUASHFS_XZ
45extern const struct squashfs_decompressor squashfs_xz_comp_ops;
46#endif
47
48#ifdef CONFIG_SQUASHFS_LZO
49extern const struct squashfs_decompressor squashfs_lzo_comp_ops;
50#endif
51
52#ifdef CONFIG_SQUASHFS_ZLIB
53extern const struct squashfs_decompressor squashfs_zlib_comp_ops;
54#endif
55
56#endif
57