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1// SPDX-License-Identifier: GPL-2.0-only2/* crc32hash.c - derived from linux/lib/crc32.c, GNU GPL v2 */3/* Usage example:4$ ./crc32hash "Dual Speed"5*/6 7#include <string.h>8#include <stdio.h>9#include <ctype.h>10#include <stdlib.h>11 12static unsigned int crc32(unsigned char const *p, unsigned int len)13{14	int i;15	unsigned int crc = 0;16	while (len--) {17		crc ^= *p++;18		for (i = 0; i < 8; i++)19			crc = (crc >> 1) ^ ((crc & 1) ? 0xedb88320 : 0);20	}21	return crc;22}23 24int main(int argc, char **argv) {25	unsigned int result;26	if (argc != 2) {27		printf("no string passed as argument\n");28		return -1;29	}30	result = crc32((unsigned char const *)argv[1], strlen(argv[1]));31	printf("0x%x\n", result);32	return 0;33}34