c_cpp 来自void指针的hash数据

Posted 2021-05-14

#include "stdio.h"

// djb2 hash example

unsigned long
hash(void *object, unsigned n)
{
    unsigned char* str = object;
    unsigned long hash = 5381;
    int c;

    while (n--)
    {
        c = *str++;
        hash = ((hash << 5) + hash) + c; 
    }

    return hash;
}