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33 lines
973 B
33 lines
973 B
// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Copyright 2017 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package mvmap
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const (
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offset64 uint64 = 14695981039346656037
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prime64 uint64 = 1099511628211
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)
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// fnvHash64 is ported from go library, which is thread-safe.
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func fnvHash64(data []byte) uint64 {
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hash := offset64
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for _, c := range data {
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hash *= prime64
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hash ^= uint64(c)
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}
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return hash
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}
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