forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
33 lines
702 B
33 lines
702 B
// SPDX-License-Identifier: GPL-2.0-only |
|
/* 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; |
|
}
|
|
|