byte[] DecompressLZS()
{
while (!IsFinished)
{
bool isCompressed = Input.BooleanMSB();
if (isCompressed) // Compressed bytes follow.
{
int offsetCode = Input.ReadMSB(1); // 0 for 11 bits offset, 1 for 7 bits offset and possible end marker.
int offset = Input.ReadMSB(offsetCode == 1 ? 7 : 11);
if (offset == 0)
{
// Zero offset is an end marker for the 7-bit offset length.
if (offsetCode == 1)
{
break;
}
throw new InvalidDataException("Zero offset.");
}
int count = ReadLZSRunLength();
if (count == 0)
{
throw new InvalidDataException("Length mismatch.");
}
WriteMemory(offset, count);
}
else // Literal byte follows
{
byte literal = (byte)Input.ReadMSB(8);
Write(literal);
}
}
CheckEnd();
return(OutputData);
}
