lib/lzo/lzodefs.h

   1 /*
   2  *  lzodefs.h -- architecture, OS and compiler specific defines
   3  *
   4  *  Copyright (C) 1996-2005 Markus F.X.J. Oberhumer <markus@oberhumer.com>
   5  *
   6  *  The full LZO package can be found at:
   7  *  http://www.oberhumer.com/opensource/lzo/
   8  *
   9  *  Changed for kernel use by:
  10  *  Nitin Gupta <nitingupta910@gmail.com>
  11  *  Richard Purdie <rpurdie@openedhand.com>
  12  */
  13
  14 #define LZO_VERSION             0x2020
  15 #define LZO_VERSION_STRING      "2.02"
  16 #define LZO_VERSION_DATE        "Oct 17 2005"
  17
  18 #define M1_MAX_OFFSET   0x0400
  19 #define M2_MAX_OFFSET   0x0800
  20 #define M3_MAX_OFFSET   0x4000
  21 #define M4_MAX_OFFSET   0xbfff
  22
  23 #define M1_MIN_LEN      2
  24 #define M1_MAX_LEN      2
  25 #define M2_MIN_LEN      3
  26 #define M2_MAX_LEN      8
  27 #define M3_MIN_LEN      3
  28 #define M3_MAX_LEN      33
  29 #define M4_MIN_LEN      3
  30 #define M4_MAX_LEN      9
  31
  32 #define M1_MARKER       0
  33 #define M2_MARKER       64
  34 #define M3_MARKER       32
  35 #define M4_MARKER       16
  36
  37 #define D_BITS          14
  38 #define D_MASK          ((1u << D_BITS) - 1)
  39 #define D_HIGH          ((D_MASK >> 1) + 1)
  40
  41 #define DX2(p, s1, s2)  (((((size_t)((p)[2]) << (s2)) ^ (p)[1]) \
  42                                                         << (s1)) ^ (p)[0])
  43 #define DX3(p, s1, s2, s3)      ((DX2((p)+1, s2, s3) << (s1)) ^ (p)[0])