/* SPDX-License-Identifier: GPL-2.0-or-later */

  #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>

   *

   * 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_LZ4
  extern const struct squashfs_decompressor squashfs_lz4_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

  #ifdef CONFIG_SQUASHFS_ZSTD
  extern const struct squashfs_decompressor squashfs_zstd_comp_ops;
  #endif

  #endif