/
hash.go
41 lines (36 loc) · 1.28 KB
/
hash.go
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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
package internal
import "github.com/spaolacci/murmur3"
// JavaStringHash and Java String.hashCode() equivalent
func JavaStringHash(s string) uint32 {
var h uint32
for i, size := 0, len(s); i < size; i++ {
h = 31*h + uint32(s[i])
}
return h
}
// Murmur3_32Hash use Murmur3 hashing function
func Murmur3_32Hash(s string) uint32 {
h := murmur3.New32()
_, err := h.Write([]byte(s))
if err != nil {
return 0
}
// Maintain compatibility with values used in Java client
return h.Sum32() & 0x7fffffff
}