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

   1 #ifndef LZO_WRAPPER_H
   2 #define LZO_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  * lzo_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)->algorithm = inswap_le32((s)->algorithm); \
  40         (s)->compression_level = inswap_le32((s)->compression_level); \
  41 }
  42 #else
  43 #define SQUASHFS_INSWAP_COMP_OPTS(s)
  44 #endif
  45
  46 /* Define the compression flags recognised. */
  47 #define SQUASHFS_LZO1X_1        0
  48 #define SQUASHFS_LZO1X_1_11     1
  49 #define SQUASHFS_LZO1X_1_12     2
  50 #define SQUASHFS_LZO1X_1_15     3
  51 #define SQUASHFS_LZO1X_999      4
  52
  53 /* Default compression level used by SQUASHFS_LZO1X_999 */
  54 #define SQUASHFS_LZO1X_999_COMP_DEFAULT 8
  55
  56 struct lzo_comp_opts {
  57         int algorithm;
  58         int compression_level;
  59 };
  60
  61 struct lzo_algorithm {
  62         char *name;
  63         int size;
  64         int (*compress) (const lzo_bytep, lzo_uint, lzo_bytep, lzo_uintp,
  65                 lzo_voidp);
  66 };
  67
  68 struct lzo_stream {
  69         void *workspace;
  70         void *buffer;
  71 };
  72
  73 #define LZO_MAX_EXPANSION(size) (size + (size / 16) + 64 + 3)
  74
  75 int lzo1x_999_wrapper(const lzo_bytep, lzo_uint, lzo_bytep, lzo_uintp,
  76                 lzo_voidp);
  77
  78 #endif