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32 lines
805 B
32 lines
805 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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// BKDR implements the classic BKDR hash algorithm for 32 bits.
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func BKDR(str []byte) uint32 {
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var (
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seed uint32 = 131 // 31 131 1313 13131 131313 etc..
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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*seed + uint32(str[i])
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}
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return hash
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}
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// BKDR64 implements the classic BKDR hash algorithm for 64 bits.
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func BKDR64(str []byte) uint64 {
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var (
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seed uint64 = 131 // 31 131 1313 13131 131313 etc..
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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*seed + uint64(str[i])
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}
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return hash
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}
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