linux/fs/squashfs/decompressor.h
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   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_LZO
  50extern const struct squashfs_decompressor squashfs_lzo_comp_ops;
  51#endif
  52
  53#ifdef CONFIG_SQUASHFS_ZLIB
  54extern const struct squashfs_decompressor squashfs_zlib_comp_ops;
  55#endif
  56
  57#endif
  58