totalStreamsSize := compressedSize
	if (hdr & 3) == 2 {
		// Compressed_Literals_Block.
		// Read new huffman tree.

		if len(r.huffmanTable) < 1<<maxHuffmanBits {
			r.huffmanTable = make([]uint16, 1<<maxHuffmanBits)
		}

		huffmanTableBits, hoff, err := r.readHuff(data, off, r.huffmanTable)
		if err != nil {
			return 0, nil, err
		}
		r.huffmanTableBits = huffmanTableBits

		if totalStreamsSize < hoff-off {

	off int

	// The current repeated offsets.
	repeatedOffset1 uint32
	repeatedOffset2 uint32
	repeatedOffset3 uint32

	// The current Huffman tree used for compressing literals.
	huffmanTable     []uint16
	huffmanTableBits int

	// The window for back references.
	window window

	// A buffer available to hold a compressed block.
	compressedBuf []byte

	// A buffer for literals.