Method writeBlockSkip

flate/deflate.go:189–208

writeBlockSkip writes the current block and uses the number of tokens to determine if the block should be stored on no matches, or only huffman encoded.

(tok *tokens, index int, eof bool)

// to determine if the block should be stored on no matches, or
// only huffman encoded.
func (d *compressor) writeBlockSkip(tok *tokens, index int, eof bool) error {
	if index > 0 || eof {
		if d.blockStart <= index {
			window := d.window[d.blockStart:index]
			// If we removed less than a 64th of all literals
			// we huffman compress the block.
			if int(tok.n) > len(window)-int(tok.n>>6) {
				d.w.writeBlockHuff(eof, window, d.sync)
			} else {
				// Write a dynamic huffman block.
				d.w.writeBlockDynamic(tok, eof, window, d.sync)
			}
		} else {
			d.w.writeBlock(tok, eof, nil)
		}
		d.blockStart = index
		return d.w.err
	}
	return nil
}

// fillWindow will fill the current window with the supplied
// dictionary and calculate all hashes.