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

   1 #ifndef ZSTD_WRAPPER_H
   2 #define ZSTD_WRAPPER_H
   3 /*
   4  * Squashfs
   5  *
   6  * Copyright (c) 2017
   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  * zstd_wrapper.h
  20  *
  21  */
  22
  23 #ifndef linux
  24 #define __BYTE_ORDER BYTE_ORDER
  25 #define __BIG_ENDIAN BIG_ENDIAN
  26 #define __LITTLE_ENDIAN LITTLE_ENDIAN
  27 #else
  28 #include <endian.h>
  29 #endif
  30
  31 #if __BYTE_ORDER == __BIG_ENDIAN
  32 extern unsigned int inswap_le16(unsigned short);
  33 extern unsigned int inswap_le32(unsigned int);
  34
  35 #define SQUASHFS_INSWAP_COMP_OPTS(s) { \
  36         (s)->compression_level = inswap_le32((s)->compression_level); \
  37 }
  38 #else
  39 #define SQUASHFS_INSWAP_COMP_OPTS(s)
  40 #endif
  41
  42 /* Default compression */
  43 #define ZSTD_DEFAULT_COMPRESSION_LEVEL 15
  44
  45 struct zstd_comp_opts {
  46         int compression_level;
  47 };
  48 #endif