Method adapt

coder/arith/models.go:18–25

(bit uint)

func (m *Shift) NBits() uint { return 1 }

func (m *Shift) adapt(bit uint) {
	switch bit {
	case 1:
		m.P += (MaxP - m.P) >> m.I
	case 0:
		m.P -= m.P >> m.I
	}
}

func (m *Shift) Encode(enc *Encoder, bit uint) {
	enc.Encode(bit, m.P)