package bloomfilter

type Local struct {
	bitmap []int
}

func (l *Local) getSite(sum uint64) (index uint64, offset uint64) {
	index = sum >> 5
	offset = sum & 31

	return
}

func (l *Local) Create(u uint64) {
	l.bitmap = make([]int, u/32+1)
}

func (l *Local) Set(uint64s []uint64) error {
	for _, u := range uint64s {
		index, offset := l.getSite(u)
		l.bitmap[index] |= 1 << offset
	}

	return nil
}

func (l *Local) Get(uint64s []uint64) (bool, error) {
	for _, u := range uint64s {
		index, offset := l.getSite(u)
		if l.bitmap[index]&(1<<offset) == 0 {
			return false, nil
		}
	}

	return true, nil
}