private bool?DecodeInitialLength()
{
if (this.extraBits > 0)
{
int bits = this.input.GetBits(this.extraBits);
if (bits < 0)
{
return(new bool?(false));
}
if (this.blockLength < 0 || this.blockLength >= DeflateDecompressor.lengthBase.Length)
{
DeflateDecompressor.ThrowInvalidData();
}
this.blockLength = DeflateDecompressor.lengthBase[this.blockLength] + bits;
}
this.state = DeflateDecompressor.DecompressorState.HaveFullLength;
return(new bool?());
}
private void DecodeDistance(ref int nextSymbol)
{
nextSymbol -= 257;
if (nextSymbol < 8)
{
nextSymbol += 3;
this.extraBits = 0;
}
else if (nextSymbol != 28)
{
if (nextSymbol < 0 || nextSymbol >= Tree.ExtraLengthBits.Length)
{
DeflateDecompressor.ThrowInvalidData();
}
this.extraBits = Tree.ExtraLengthBits[nextSymbol];
}
else
{
nextSymbol = 258;
this.extraBits = 0;
}
this.blockLength = nextSymbol;
}
