decompressor.h revision d7f2ff67
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 *, int);
28	void	(*free)(void *);
29	int	(*decompress)(struct squashfs_sb_info *, void **,
30		struct buffer_head **, int, int, int, int, int);
31	int	id;
32	char	*name;
33	int	supported;
34};
35
36static inline void squashfs_decompressor_free(struct squashfs_sb_info *msblk,
37	void *s)
38{
39	if (msblk->decompressor)
40		msblk->decompressor->free(s);
41}
42
43static inline int squashfs_decompress(struct squashfs_sb_info *msblk,
44	void **buffer, struct buffer_head **bh, int b, int offset, int length,
45	int srclength, int pages)
46{
47	return msblk->decompressor->decompress(msblk, buffer, bh, b, offset,
48		length, srclength, pages);
49}
50
51#ifdef CONFIG_SQUASHFS_XZ
52extern const struct squashfs_decompressor squashfs_xz_comp_ops;
53#endif
54
55#ifdef CONFIG_SQUASHFS_LZO
56extern const struct squashfs_decompressor squashfs_lzo_comp_ops;
57#endif
58
59#endif
60