// Copy up to length of bytes from input directly.
// This is used for uncompressed block.
public int CopyFrom(InputBuffer input, int length)
{
length = Math.Min(Math.Min(length, WindowSize - this.AvailableBytes), input.AvailableBytes);
int copied;
// We might need wrap around to copy all bytes.
var tailLen = WindowSize - _end;
if (length > tailLen)
{
// copy the first part
copied = input.CopyTo(_window, _end, tailLen);
if (copied == tailLen)
{
// only try to copy the second part if we have enough bytes in input
copied += input.CopyTo(_window, 0, length - tailLen);
}
}
else
{
// only one copy is needed if there is no wrap around.
copied = input.CopyTo(_window, _end, length);
}
_end = (_end + copied) & WindowMask;
this.AvailableBytes += copied;
return copied;
}
private IFileFormatReader _formatReader; // class to decode header and footer (e.g. gzip)
public Inflater()
{
_output = new OutputWindow();
_input = new InputBuffer();
_codeList = new byte[HuffmanTree.MaxLiteralTreeElements + HuffmanTree.MaxDistTreeElements];
_codeLengthTreeCodeLength = new byte[HuffmanTree.NumberOfCodeLengthTreeElements];
Reset();
}