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| /* 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;
| }
|
|
