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64c70b1c RP |
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]) |