plugeth/ethchain/bloom.go

48 lines
711 B
Go

package ethchain
type BloomFilter struct {
bin []byte
}
func NewBloomFilter(bin []byte) *BloomFilter {
if bin == nil {
bin = make([]byte, 256)
}
return &BloomFilter{
bin: bin,
}
}
func (self *BloomFilter) Set(addr []byte) {
if len(addr) < 8 {
chainlogger.Warnf("err: bloom set to small: %x\n", addr)
return
}
for _, i := range addr[len(addr)-8:] {
self.bin[i] = 1
}
}
func (self *BloomFilter) Search(addr []byte) bool {
if len(addr) < 8 {
chainlogger.Warnf("err: bloom search to small: %x\n", addr)
return false
}
for _, i := range addr[len(addr)-8:] {
if self.bin[i] == 0 {
return false
}
}
return true
}
func (self *BloomFilter) Bin() []byte {
return self.bin
}