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89 lines
2.6 KiB
Java
89 lines
2.6 KiB
Java
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// Base.java
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package SevenZip.Compression.LZMA;
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public class Base
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{
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public static final int kNumRepDistances = 4;
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public static final int kNumStates = 12;
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public static final int StateInit()
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{
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return 0;
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}
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public static final int StateUpdateChar(int index)
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{
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if (index < 4)
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return 0;
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if (index < 10)
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return index - 3;
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return index - 6;
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}
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public static final int StateUpdateMatch(int index)
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{
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return (index < 7 ? 7 : 10);
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}
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public static final int StateUpdateRep(int index)
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{
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return (index < 7 ? 8 : 11);
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}
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public static final int StateUpdateShortRep(int index)
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{
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return (index < 7 ? 9 : 11);
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}
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public static final boolean StateIsCharState(int index)
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{
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return index < 7;
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}
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public static final int kNumPosSlotBits = 6;
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public static final int kDicLogSizeMin = 0;
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// public static final int kDicLogSizeMax = 28;
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// public static final int kDistTableSizeMax = kDicLogSizeMax * 2;
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public static final int kNumLenToPosStatesBits = 2; // it's for speed optimization
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public static final int kNumLenToPosStates = 1 << kNumLenToPosStatesBits;
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public static final int kMatchMinLen = 2;
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public static final int GetLenToPosState(int len)
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{
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len -= kMatchMinLen;
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if (len < kNumLenToPosStates)
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return len;
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return (int)(kNumLenToPosStates - 1);
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}
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public static final int kNumAlignBits = 4;
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public static final int kAlignTableSize = 1 << kNumAlignBits;
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public static final int kAlignMask = (kAlignTableSize - 1);
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public static final int kStartPosModelIndex = 4;
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public static final int kEndPosModelIndex = 14;
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public static final int kNumPosModels = kEndPosModelIndex - kStartPosModelIndex;
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public static final int kNumFullDistances = 1 << (kEndPosModelIndex / 2);
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public static final int kNumLitPosStatesBitsEncodingMax = 4;
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public static final int kNumLitContextBitsMax = 8;
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public static final int kNumPosStatesBitsMax = 4;
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public static final int kNumPosStatesMax = (1 << kNumPosStatesBitsMax);
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public static final int kNumPosStatesBitsEncodingMax = 4;
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public static final int kNumPosStatesEncodingMax = (1 << kNumPosStatesBitsEncodingMax);
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public static final int kNumLowLenBits = 3;
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public static final int kNumMidLenBits = 3;
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public static final int kNumHighLenBits = 8;
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public static final int kNumLowLenSymbols = 1 << kNumLowLenBits;
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public static final int kNumMidLenSymbols = 1 << kNumMidLenBits;
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public static final int kNumLenSymbols = kNumLowLenSymbols + kNumMidLenSymbols +
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(1 << kNumHighLenBits);
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public static final int kMatchMaxLen = kMatchMinLen + kNumLenSymbols - 1;
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}
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