#ifndef DECOMPRESSOR_H
  #define DECOMPRESSOR_H
  /*
   * Squashfs - a compressed read only filesystem for Linux
   *
   * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
   * Phillip Lougher <phillip@squashfs.org.uk>
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * as published by the Free Software Foundation; either version 2,
   * or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
   *
   * decompressor.h
   */
  
  struct squashfs_decompressor {
  	void	*(*init)(struct squashfs_sb_info *, void *);
  	void	*(*comp_opts)(struct squashfs_sb_info *, void *, int);
  	void	(*free)(void *);
  	int	(*decompress)(struct squashfs_sb_info *, void *,
  		struct buffer_head **, int, int, int,
  		struct squashfs_page_actor *);
  	int	id;
  	char	*name;
  	int	supported;
  };
  
  static inline void *squashfs_comp_opts(struct squashfs_sb_info *msblk,
  							void *buff, int length)
  {
  	return msblk->decompressor->comp_opts ?
  		msblk->decompressor->comp_opts(msblk, buff, length) : NULL;
  }
  
  #ifdef CONFIG_SQUASHFS_XZ
  extern const struct squashfs_decompressor squashfs_xz_comp_ops;
  #endif
  
  #ifdef CONFIG_SQUASHFS_LZO
  extern const struct squashfs_decompressor squashfs_lzo_comp_ops;
  #endif
  
  #ifdef CONFIG_SQUASHFS_ZLIB
  extern const struct squashfs_decompressor squashfs_zlib_comp_ops;
  #endif
  
  #endif