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 *, 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#ifdef CONFIG_SQUASHFS_ZLIB
  60extern const struct squashfs_decompressor squashfs_zlib_comp_ops;
  61#endif
  62
  63#endif
  64
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