hash.c

来自「栈溢出源码」· C语言 代码 · 共 28 行

#include <stdio.h>
#include <stdlib.h>

// Get function hash
unsigned long hash(unsigned char *c)
{
    unsigned long h=0;
    while(*c)
    {
        h = ( ( h << 25 ) | ( h >> 7 ) ) + *c++;
    }
    return h;
}

int main(int argc, char **argv)
{
	unsigned long hash_val;

	if (argc < 2)
	{
		printf("Please enter function name.\n");
		return -1;
	}

	hash_val = hash(argv[1]);
	printf("hash(%s) = %.8x\n", argv[1], hash_val);
	return 0;
}