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