org.glassfish.grizzly.compression.lzma.impl.Base Maven / Gradle / Ivy
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package org.glassfish.grizzly.compression.lzma.impl;
/**
* Base
*
* @author Igor Pavlov
*/
public class Base {
public static final int kNumRepDistances = 4;
public static final int kNumStates = 12;
public static int stateInit() {
return 0;
}
public static int stateUpdateChar(int index) {
if (index < 4) {
return 0;
}
if (index < 10) {
return index - 3;
}
return index - 6;
}
public static int stateUpdateMatch(int index) {
return (index < 7 ? 7 : 10);
}
public static int stateUpdateRep(int index) {
return (index < 7 ? 8 : 11);
}
public static int stateUpdateShortRep(int index) {
return (index < 7 ? 9 : 11);
}
public static 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 int getLenToPosState(int len) {
len -= kMatchMinLen;
if (len < kNumLenToPosStates) {
return len;
}
return 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;
}