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Based on kernel version 3.15.4. Page generated on 2014-07-07 09:04 EST.

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	
11	static 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	
23	int 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	}
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