public uint Decode(Lzma.Decoder rangeDecoder)
{
uint num = (rangeDecoder.Range >> 11) * this.Prob;
if (rangeDecoder.Code < num)
{
rangeDecoder.Range = num;
this.Prob += (uint)((0x800 - this.Prob) >> 5);
if (rangeDecoder.Range < 0x1000000)
{
rangeDecoder.Code = (rangeDecoder.Code << 8) | ((byte)rangeDecoder.Stream.ReadByte());
rangeDecoder.Range = rangeDecoder.Range << 8;
}
return(0);
}
rangeDecoder.Range -= num;
rangeDecoder.Code -= num;
this.Prob -= this.Prob >> 5;
if (rangeDecoder.Range < 0x1000000)
{
rangeDecoder.Code = (rangeDecoder.Code << 8) | ((byte)rangeDecoder.Stream.ReadByte());
rangeDecoder.Range = rangeDecoder.Range << 8;
}
return(1);
}
public uint Decode(Lzma.Decoder rangeDecoder)
{
uint index = 1;
for (int i = this.NumBitLevels; i > 0; i--)
{
index = (index << 1) + this.Models[index].Decode(rangeDecoder);
}
return(index - (((uint)1) << this.NumBitLevels));
}
public byte DecodeNormal(Lzma.Decoder rangeDecoder)
{
uint index = 1;
do
{
index = (index << 1) | this.m_Decoders[index].Decode(rangeDecoder);
}while (index < 0x100);
return((byte)index);
}
public uint ReverseDecode(Lzma.Decoder rangeDecoder)
{
uint index = 1;
uint num2 = 0;
for (int i = 0; i < this.NumBitLevels; i++)
{
uint num4 = this.Models[index].Decode(rangeDecoder);
index = index << 1;
index += num4;
num2 |= num4 << i;
}
return(num2);
}
public uint Decode(Lzma.Decoder rangeDecoder, uint posState)
{
if (this.m_Choice.Decode(rangeDecoder) == 0)
{
return(this.m_LowCoder[posState].Decode(rangeDecoder));
}
uint num = 8;
if (this.m_Choice2.Decode(rangeDecoder) == 0)
{
num += this.m_MidCoder[posState].Decode(rangeDecoder);
}
else
{
num += 8;
num += this.m_HighCoder.Decode(rangeDecoder);
}
return(num);
}
public byte DecodeWithMatchByte(Lzma.Decoder rangeDecoder, byte matchByte)
{
uint index = 1;
do
{
uint num2 = (uint)((matchByte >> 7) & 1);
matchByte = (byte)(matchByte << 1);
uint num3 = this.m_Decoders[(int)((IntPtr)(((1 + num2) << 8) + index))].Decode(rangeDecoder);
index = (index << 1) | num3;
if (num2 != num3)
{
while (index < 0x100)
{
index = (index << 1) | this.m_Decoders[index].Decode(rangeDecoder);
}
break;
}
}while (index < 0x100);
return((byte)index);
}
public byte DecodeWithMatchByte(Lzma.Decoder rangeDecoder, uint pos, byte prevByte, byte matchByte)
{
return(this.m_Coders[this.GetState(pos, prevByte)].DecodeWithMatchByte(rangeDecoder, matchByte));
}
public byte DecodeNormal(Lzma.Decoder rangeDecoder, uint pos, byte prevByte)
{
return(this.m_Coders[this.GetState(pos, prevByte)].DecodeNormal(rangeDecoder));
}
public static uint ReverseDecode(Lzma.BitDecoder[] Models, uint startIndex, Lzma.Decoder rangeDecoder, int NumBitLevels)
{
uint num = 1;
uint num2 = 0;
for (int i = 0; i < NumBitLevels; i++)
{
uint num4 = Models[startIndex + num].Decode(rangeDecoder);
num = num << 1;
num += num4;
num2 |= num4 << i;
}
return(num2);
}
