Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /* crc32hash.c - derived from linux/lib/crc32.c, GNU GPL v2 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) /* Usage example:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) $ ./crc32hash "Dual Speed"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <stdio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <ctype.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <stdlib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) static unsigned int crc32(unsigned char const *p, unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	unsigned int crc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	while (len--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 		crc ^= *p++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 		for (i = 0; i < 8; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 			crc = (crc >> 1) ^ ((crc & 1) ? 0xedb88320 : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	return crc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) int main(int argc, char **argv) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	unsigned int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	if (argc != 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 		printf("no string passed as argument\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	result = crc32((unsigned char const *)argv[1], strlen(argv[1]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	printf("0x%x\n", result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) }