gf/encoding/ghash/ghash_djb.go

// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
//
// This Source Code Form is subject to the terms of the MIT License.
// If a copy of the MIT was not distributed with this file,
// You can obtain one at https://github.com/gogf/gf.

package ghash

// DJB implements the classic DJB hash algorithm for 32 bits.
func DJB(str []byte) uint32 {
	var hash uint32 = 5381
	for i := 0; i < len(str); i++ {
		hash += (hash << 5) + uint32(str[i])
	}
	return hash
}

// DJB64 implements the classic DJB hash algorithm for 64 bits.
func DJB64(str []byte) uint64 {
	var hash uint64 = 5381
	for i := 0; i < len(str); i++ {
		hash += (hash << 5) + uint64(str[i])
	}
	return hash
}