// 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 (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;
}