private void DecompressPosSlotProcess()
{
if (this.positionSlot >= 4U)
{
int numBitLevels = (int)(this.positionSlot >> 1) - 1;
this.repeater = (uint)((2 | (int)this.positionSlot & 1) << numBitLevels);
if (this.positionSlot < 14U)
{
uint num = LzmaBitTreeDecoder.ReverseDecode(this.positionDecoders, (uint)((int)this.repeater - (int)this.positionSlot - 1), this.rangeDecoder, numBitLevels);
if (this.rangeDecoder.InputRequired)
{
return;
}
this.repeater += num;
}
else
{
uint num = this.rangeDecoder.DecodeDirectBits(numBitLevels - 4) << 4;
if (this.rangeDecoder.InputRequired)
{
return;
}
this.repeater += num;
this.decompressState = LzmaDecompressor.LzmaDecompressorState.ReverseDecoder;
return;
}
}
else
{
this.repeater = this.positionSlot;
}
this.decompressState = LzmaDecompressor.LzmaDecompressorState.CopyBlock;
}
private void DecompressMatchDecoder()
{
uint num = this.matchDecoders[(IntPtr)((this.lzmaState.Index << 4) + this.positionState)].DecodeState(this.rangeDecoder);
bool inputRequired = this.rangeDecoder.InputRequired;
bool flag = this.rangeDecoder.CheckInputRequired(1, true);
if (!flag && !inputRequired && this.rangeDecoder.FinalBlock)
{
if (this.currentPosition < (ulong)this.Settings.InternalStreamLength)
{
flag = this.rangeDecoder.CheckInputRequired(0, true);
}
else
{
this.decompressState = LzmaDecompressor.LzmaDecompressorState.Done;
}
}
if (!flag)
{
return;
}
this.decodedState = num;
if (this.decodedState == 0U)
{
this.decompressState = LzmaDecompressor.LzmaDecompressorState.LiteralDecoder;
}
else
{
this.decompressState = LzmaDecompressor.LzmaDecompressorState.RepeaterDecoder;
}
}
private void DecompressRepeaterG2Decoder()
{
uint num1 = this.repeaterG2Decoders[(IntPtr)this.lzmaState.Index].DecodeState(this.rangeDecoder);
if (this.rangeDecoder.InputRequired)
{
return;
}
this.decodedState = num1;
uint num2;
if (this.decodedState == 0U)
{
num2 = this.repeaterPosition2;
}
else
{
num2 = this.repeaterPosition3;
this.repeaterPosition3 = this.repeaterPosition2;
}
this.repeaterPosition2 = this.repeaterPosition1;
this.repeaterPosition1 = this.repeater;
this.repeater = num2;
this.decompressState = LzmaDecompressor.LzmaDecompressorState.RepeaterLengthDecoder;
}
private void DecompressPosSlotDecoder()
{
this.positionSlot = this.positionSlotDecoder[(IntPtr)LzmaState.GetLenToPosState(this.decodedLength)].Decode(this.rangeDecoder);
if (this.rangeDecoder.InputRequired)
{
return;
}
this.decompressState = LzmaDecompressor.LzmaDecompressorState.PosSlotProcess;
}
private void DecompressRepeaterLengthDecoder()
{
this.decodedLength = this.repeaterLengthDecoder.Decode(this.rangeDecoder, this.positionState) + 2U;
if (this.rangeDecoder.InputRequired)
{
return;
}
this.lzmaState.UpdateRep();
this.decompressState = LzmaDecompressor.LzmaDecompressorState.CopyBlock;
}
private void DecompressReverseDecoder()
{
uint num = this.positionAlignDecoder.ReverseDecode(this.rangeDecoder);
if (this.rangeDecoder.InputRequired)
{
return;
}
this.repeater += num;
this.decompressState = LzmaDecompressor.LzmaDecompressorState.CopyBlock;
}
private void DecompressLengthDecoder()
{
this.decodedLength = 2U + this.lengthDecoder.Decode(this.rangeDecoder, this.positionState);
if (this.rangeDecoder.InputRequired)
{
return;
}
this.repeaterPosition3 = this.repeaterPosition2;
this.repeaterPosition2 = this.repeaterPosition1;
this.repeaterPosition1 = this.repeater;
this.lzmaState.UpdateMatch();
this.decompressState = LzmaDecompressor.LzmaDecompressorState.PosSlotDecoder;
}
private void DecompressLiteralDecoder()
{
byte previousByte = this.outputWindow.GetByte(0U);
if (!this.rangeDecoder.CheckInputRequired(256, false))
{
return;
}
this.outputWindow.PutByte(!this.lzmaState.IsCharState() ? this.literalDecoder.DecodeWithMatchByte(this.rangeDecoder, (uint)this.currentPosition, previousByte, this.outputWindow.GetByte(this.repeater)) : this.literalDecoder.DecodeNormal(this.rangeDecoder, (uint)this.currentPosition, previousByte));
this.lzmaState.UpdateChar();
++this.currentPosition;
this.decompressState = LzmaDecompressor.LzmaDecompressorState.MatchDecoder;
}
private void DecompressCopyBlock()
{
if ((ulong)this.repeater >= this.currentPosition || this.repeater >= this.dictionarySizeCheck)
{
if (this.repeater != uint.MaxValue)
{
throw new InvalidDataException();
}
this.decompressState = LzmaDecompressor.LzmaDecompressorState.Done;
}
else
{
this.outputWindow.CopyBlock(this.repeater, this.decodedLength);
this.currentPosition += (ulong)this.decodedLength;
this.decompressState = LzmaDecompressor.LzmaDecompressorState.MatchDecoder;
}
}
private void DecompressRepeaterG0Decoder()
{
uint num = this.repeaterG0Decoders[(IntPtr)this.lzmaState.Index].DecodeState(this.rangeDecoder);
if (this.rangeDecoder.InputRequired)
{
return;
}
this.decodedState = num;
if (this.decodedState == 0U)
{
this.decompressState = LzmaDecompressor.LzmaDecompressorState.Repeater0LongDecoder;
}
else
{
this.decompressState = LzmaDecompressor.LzmaDecompressorState.RepeaterG1Decoder;
}
}
private void DecompressStart()
{
this.decodedState = this.matchDecoders[(IntPtr)(this.lzmaState.Index << 4)].DecodeState(this.rangeDecoder);
if (this.decodedState != 0U)
{
if (this.currentPosition != 0UL || this.AvailableBytesIn != 0 && this.AvailableBytesIn != 5)
{
throw new InvalidDataException();
}
this.decompressState = LzmaDecompressor.LzmaDecompressorState.Done;
}
else
{
this.lzmaState.UpdateChar();
this.outputWindow.PutByte(this.literalDecoder.DecodeNormal(this.rangeDecoder, 0U, (byte)0));
++this.currentPosition;
this.decompressState = LzmaDecompressor.LzmaDecompressorState.MatchDecoder;
}
}
private void DecompressRepeater0LongDecoder()
{
uint num = this.repeaterLongDecoders[(IntPtr)((this.lzmaState.Index << 4) + this.positionState)].DecodeState(this.rangeDecoder);
if (this.rangeDecoder.InputRequired)
{
return;
}
this.decodedState = num;
if (this.decodedState == 0U)
{
this.lzmaState.UpdateShortRep();
this.outputWindow.PutByte(this.outputWindow.GetByte(this.repeater));
++this.currentPosition;
this.decompressState = LzmaDecompressor.LzmaDecompressorState.MatchDecoder;
}
else
{
this.decompressState = LzmaDecompressor.LzmaDecompressorState.RepeaterLengthDecoder;
}
}
