两个hash算法

1、djb算法

    /* the famous DJB Hash Function for strings */  
    unsigned int DJBHash(char *str)  
    {  
        unsigned int hash = 5381;  
       
        while (*str){  
            hash = ((hash << 5) + hash) + (*str++); /* times 33 */  
        }  
        hash &= ~(1 << 31); /* strip the highest bit */  
        return hash;  
    }  

以上代码取自http://blog.csdn.net/chaosinux