blob: 18deed9232a655b657c899ebed44107ad110b251 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
// Base.java
package SevenZip.Compression.LZMA;
public class Base
{
public static final int kNumRepDistances = 4;
public static final int kNumStates = 12;
public static final int StateInit()
{
return 0;
}
public static final int StateUpdateChar(int index)
{
if (index < 4)
return 0;
if (index < 10)
return index - 3;
return index - 6;
}
public static final int StateUpdateMatch(int index)
{
return (index < 7 ? 7 : 10);
}
public static final int StateUpdateRep(int index)
{
return (index < 7 ? 8 : 11);
}
public static final int StateUpdateShortRep(int index)
{
return (index < 7 ? 9 : 11);
}
public static final boolean StateIsCharState(int index)
{
return index < 7;
}
public static final int kNumPosSlotBits = 6;
public static final int kDicLogSizeMin = 0;
// public static final int kDicLogSizeMax = 28;
// public static final int kDistTableSizeMax = kDicLogSizeMax * 2;
public static final int kNumLenToPosStatesBits = 2; // it's for speed optimization
public static final int kNumLenToPosStates = 1 << kNumLenToPosStatesBits;
public static final int kMatchMinLen = 2;
public static final int GetLenToPosState(int len)
{
len -= kMatchMinLen;
if (len < kNumLenToPosStates)
return len;
return (int)(kNumLenToPosStates - 1);
}
public static final int kNumAlignBits = 4;
public static final int kAlignTableSize = 1 << kNumAlignBits;
public static final int kAlignMask = (kAlignTableSize - 1);
public static final int kStartPosModelIndex = 4;
public static final int kEndPosModelIndex = 14;
public static final int kNumPosModels = kEndPosModelIndex - kStartPosModelIndex;
public static final int kNumFullDistances = 1 << (kEndPosModelIndex / 2);
public static final int kNumLitPosStatesBitsEncodingMax = 4;
public static final int kNumLitContextBitsMax = 8;
public static final int kNumPosStatesBitsMax = 4;
public static final int kNumPosStatesMax = (1 << kNumPosStatesBitsMax);
public static final int kNumPosStatesBitsEncodingMax = 4;
public static final int kNumPosStatesEncodingMax = (1 << kNumPosStatesBitsEncodingMax);
public static final int kNumLowLenBits = 3;
public static final int kNumMidLenBits = 3;
public static final int kNumHighLenBits = 8;
public static final int kNumLowLenSymbols = 1 << kNumLowLenBits;
public static final int kNumMidLenSymbols = 1 << kNumMidLenBits;
public static final int kNumLenSymbols = kNumLowLenSymbols + kNumMidLenSymbols +
(1 << kNumHighLenBits);
public static final int kMatchMaxLen = kMatchMinLen + kNumLenSymbols - 1;
}
|
