rollsum

Rollsum

type Rollsum struct {	
}

Count()

func (rs *Rollsum) Count() uint64

return Rollsum length

S1()

func (rs *Rollsum) S1() uint64

value of rollsum s1.

S2()

func (rs *Rollsum) S2() uint64

value of rollsum s2.

Update()

 func (rs *Rollsum) Update(p []byte)

checksum bytes p.

Init()

func (rs *Rollsum) Init()

initialize rollsum.

Rotate()

func (rs *Rollsum) Rotate(out, in byte)

rotate rollsum. remove out, sum in.

Rollin()

func (rs *Rollsum) Rollin(c byte)

add byte c checksum.

Rollout()

func (rs *Rollsum) Rollout(c byte)

remove byte c's checksum.

Digest()

func (rs *Rollsum) Digest() uint32

return Rollsum digest.