root/lib/lzo/lzodefs.h

INCLUDED FROM

/*
 *  lzodefs.h -- architecture, OS and compiler specific defines
 *
 *  Copyright (C) 1996-2005 Markus F.X.J. Oberhumer <markus@oberhumer.com>
 *
 *  The full LZO package can be found at:
 *  http://www.oberhumer.com/opensource/lzo/
 *
 *  Changed for kernel use by:
 *  Nitin Gupta <nitingupta910@gmail.com>
 *  Richard Purdie <rpurdie@openedhand.com>
 */

#define LZO_VERSION             0x2020
#define LZO_VERSION_STRING      "2.02"
#define LZO_VERSION_DATE        "Oct 17 2005"

#define M1_MAX_OFFSET   0x0400
#define M2_MAX_OFFSET   0x0800
#define M3_MAX_OFFSET   0x4000
#define M4_MAX_OFFSET   0xbfff

#define M1_MIN_LEN      2
#define M1_MAX_LEN      2
#define M2_MIN_LEN      3
#define M2_MAX_LEN      8
#define M3_MIN_LEN      3
#define M3_MAX_LEN      33
#define M4_MIN_LEN      3
#define M4_MAX_LEN      9

#define M1_MARKER       0
#define M2_MARKER       64
#define M3_MARKER       32
#define M4_MARKER       16

#define D_BITS          14
#define D_MASK          ((1u << D_BITS) - 1)
#define D_HIGH          ((D_MASK >> 1) + 1)

#define DX2(p, s1, s2)  (((((size_t)((p)[2]) << (s2)) ^ (p)[1]) \
                                                        << (s1)) ^ (p)[0])
#define DX3(p, s1, s2, s3)      ((DX2((p)+1, s2, s3) << (s1)) ^ (p)[0])