tidb fnv 代码
文件路径：/util/mvmap/fnv.go
/ Copyright 2017 PingCAP, Inc.
/
/ Licensed 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.
/ Copyright 2011 The Go Authors. All rights reserved.
/ Use of this source code is governed by a BSD-style
/ license that can be found in the LICENSE file.
package mvmap
const (
offset64 uint64 = 14695981039346656037
prime64 uint64 = 1099511628211
)
/ fnvHash64 is ported from go library, which is thread-safe.
func fnvHash64(data []byte) uint64 {
hash := offset64
for _, c := range data {
hash *= prime64
hash ^= uint64(c)
}
return hash
}