ELFHash 算法

上个学期上Distributed Software Development的时候,最后一个项目实现Distributed Hashtable,需要对文件名字符串进行Hash处理,用到了一个经典的ELFHash Function,特此摘录: 

public int ELFHash(String str, int number){
		int hash = 0;
		long x =0l;
		char[] array = str.toCharArray();
		for(int i=0; i<array.length; i++){
			hash = (hash << 4) + array[i];
			if((x = (hash & 0xF0000000L)) != 0){
				hash ^= (x >> 24);
				hash &= ~x;
			}
		}
		int result = (hash & 0x7FFFFFFF) % number;
		return result;
	}
 

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转载自liuxinglanyue.iteye.com/blog/819053