// NewS64 creates a new hash.Hash64 computing the 64bit xxHash checksum starting with the specific seed.
func NewS64(seed uint64) hash.Hash64 {
h := &xxHash64{
seed: seed,
}
h.Reset()
runtime.SetFinalizer(h, func(h *xxHash64) {
C.XXH64_digest(h.state)
})
return h
}
func (xx *XXHash64) Sum64() uint64 {
return uint64(C.XXH64_digest(&xx.state))
}
// Reset resets the Hash to its initial state.
func (xx *xxHash64) Reset() {
if xx.state != nil {
C.XXH64_digest(xx.state)
}
xx.state = C.XXH64_init(C.ulonglong(xx.seed))
}