summaryrefslogblamecommitdiffstats
path: root/tools/pcmcia/crc32hash.c
blob: 44f8beea726040a332c3c9002ea2f1fa0a1f9512 (plain) (tree)
1
2
3
4
5
6
7
8
9
10









                                                              
                                                                   
















                                                                        
                                                                        


                                 
/* crc32hash.c - derived from linux/lib/crc32.c, GNU GPL v2 */
/* Usage example:
$ ./crc32hash "Dual Speed"
*/

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

static unsigned int crc32(unsigned char const *p, unsigned int len)
{
	int i;
	unsigned int crc = 0;
	while (len--) {
		crc ^= *p++;
		for (i = 0; i < 8; i++)
			crc = (crc >> 1) ^ ((crc & 1) ? 0xedb88320 : 0);
	}
	return crc;
}

int main(int argc, char **argv) {
	unsigned int result;
	if (argc != 2) {
		printf("no string passed as argument\n");
		return -1;
	}
	result = crc32((unsigned char const *)argv[1], strlen(argv[1]));
	printf("0x%x\n", result);
	return 0;
}