SQUASHFS/squashfs-tools-4.4/squashfs-tools/lz4_wrapper.h

   1 #ifndef LZ4_WRAPPER_H
   2 #define LZ4_WRAPPER_H
   3 /*
   4  * Squashfs
   5  *
   6  * Copyright (c) 2013
   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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  22  *
  23  * lz4_wrapper.h
  24  *
  25  */
  26
  27 #ifndef linux
  28 #define __BYTE_ORDER BYTE_ORDER
  29 #define __BIG_ENDIAN BIG_ENDIAN
  30 #define __LITTLE_ENDIAN LITTLE_ENDIAN
  31 #else
  32 #include <endian.h>
  33 #endif
  34
  35 #if __BYTE_ORDER == __BIG_ENDIAN
  36 extern unsigned int inswap_le32(unsigned int);
  37
  38 #define SQUASHFS_INSWAP_COMP_OPTS(s) { \
  39         (s)->version = inswap_le32((s)->version); \
  40         (s)->flags = inswap_le32((s)->flags); \
  41 }
  42 #else
  43 #define SQUASHFS_INSWAP_COMP_OPTS(s)
  44 #endif
  45
  46 /*
  47  * Define the various stream formats recognised.
  48  * Currently omly legacy stream format is supported by the
  49  * kernel
  50  */
  51 #define LZ4_LEGACY      1
  52 #define LZ4_FLAGS_MASK  1
  53
  54 /* Define the compression flags recognised. */
  55 #define LZ4_HC          1
  56
  57 struct lz4_comp_opts {
  58         int version;
  59         int flags;
  60 };
  61 #endif