blob: b6d482c492efa5a0d2a8e5bf764864552d0698f2 [file] [log] [blame]
Stefan Roeseb1b4e892009-03-19 15:34:56 +01001/*
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])