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 26 struct 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 38 static 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 46 extern const struct squashfs_decompressor squashfs_xz_comp_ops; 47 #endif 48 49 #ifdef CONFIG_SQUASHFS_LZ4 50 extern const struct squashfs_decompressor squashfs_lz4_comp_ops; 51 #endif 52 53 #ifdef CONFIG_SQUASHFS_LZO 54 extern const struct squashfs_decompressor squashfs_lzo_comp_ops; 55 #endif 56 57 #ifdef CONFIG_SQUASHFS_ZLIB 58 extern const struct squashfs_decompressor squashfs_zlib_comp_ops; 59 #endif 60 61 #endif 62