1/* crc32hash.c - derived from linux/lib/crc32.c, GNU GPL v2 */
 2/* Usage example:
 3$ ./crc32hash "Dual Speed"
 4*/
 5
 6#include <string.h>
 7#include <stdio.h>
 8#include <ctype.h>
 9#include <stdlib.h>
10
11static unsigned int crc32(unsigned char const *p, unsigned int len)
12{
13	int i;
14	unsigned int crc = 0;
15	while (len--) {
16		crc ^= *p++;
17		for (i = 0; i < 8; i++)
18			crc = (crc >> 1) ^ ((crc & 1) ? 0xedb88320 : 0);
19	}
20	return crc;
21}
22
23int main(int argc, char **argv) {
24	unsigned int result;
25	if (argc != 2) {
26		printf("no string passed as argument\n");
27		return -1;
28	}
29	result = crc32((unsigned char const *)argv[1], strlen(argv[1]));
30	printf("0x%x\n", result);
31	return 0;
32}