31 lines
517 B
Go
31 lines
517 B
Go
package jump
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import (
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"bytes"
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"crypto/md5"
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"encoding/binary"
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)
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//Hash get result by hash
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func Hash(key uint64, numBuckets int) int32 {
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var b int64 = -1
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var j int64
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for j < int64(numBuckets) {
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b = j
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key = key*2862933555777941757 + 1
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j = int64(float64(b+1) * (float64(int64(1)<<31) / float64((key>>33)+1)))
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}
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return int32(b)
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}
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//Md5 get result by Md5
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func Md5(key string) uint64 {
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var x uint64
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s := md5.Sum([]byte(key))
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b := bytes.NewBuffer(s[:])
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binary.Read(b, binary.BigEndian, &x)
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return x
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}
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