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36 lines
787 B
36 lines
787 B
// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://github.com/gogf/gf.
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package ghash
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// RS implements the classic RS hash algorithm for 32 bits.
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func RS(str []byte) uint32 {
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var (
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b uint32 = 378551
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a uint32 = 63689
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hash uint32 = 0
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)
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for i := 0; i < len(str); i++ {
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hash = hash*a + uint32(str[i])
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a *= b
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}
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return hash
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}
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// RS64 implements the classic RS hash algorithm for 64 bits.
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func RS64(str []byte) uint64 {
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var (
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b uint64 = 378551
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a uint64 = 63689
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hash uint64 = 0
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)
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for i := 0; i < len(str); i++ {
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hash = hash*a + uint64(str[i])
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a *= b
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}
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return hash
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}
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