func()

in flexflate/deflate.go [98:133]

• 35 lines of code
• 8 McCabe index (conditional complexity)

func (d *compressor) fillDeflate(b []byte) int {
	if d.index >= 2*windowSize-(minMatchLength+maxMatchLength) {
		// shift the window by windowSize
		copy(d.window, d.window[windowSize:2*windowSize])
		d.index -= windowSize
		d.windowEnd -= windowSize
		if d.blockStart >= windowSize {
			d.blockStart -= windowSize
		} else {
			d.blockStart = math.MaxInt32
		}
		d.hashOffset += windowSize
		if d.hashOffset > maxHashOffset {
			delta := d.hashOffset - 1
			d.hashOffset -= delta
			d.chainHead -= delta
			for i, v := range d.hashPrev {
				if v > delta {
					d.hashPrev[i] -= delta
				} else {
					d.hashPrev[i] = 0
				}
			}
			for i, v := range d.hashHead {
				if v > delta {
					d.hashHead[i] -= delta
				} else {
					d.hashHead[i] = 0
				}
			}
		}
	}
	n := copy(d.window[d.windowEnd:], b)
	d.windowEnd += n
	return n
}