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34 lines
893 B
34 lines
893 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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// AP implements the classic AP hash algorithm for 32 bits.
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func AP(str []byte) uint32 {
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var hash uint32
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for i := 0; i < len(str); i++ {
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if (i & 1) == 0 {
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hash ^= (hash << 7) ^ uint32(str[i]) ^ (hash >> 3)
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} else {
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hash ^= ^((hash << 11) ^ uint32(str[i]) ^ (hash >> 5)) + 1
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}
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}
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return hash
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}
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// AP64 implements the classic AP hash algorithm for 64 bits.
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func AP64(str []byte) uint64 {
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var hash uint64
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for i := 0; i < len(str); i++ {
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if (i & 1) == 0 {
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hash ^= (hash << 7) ^ uint64(str[i]) ^ (hash >> 3)
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} else {
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hash ^= ^((hash << 11) ^ uint64(str[i]) ^ (hash >> 5)) + 1
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}
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}
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return hash
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}
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