Description:
Cyclic Redundancy Check routines. These are reasonably fast
checksum routines, but not suitable for cryptographic use.
They are useful for simple error detection, eg. a 32-bit CRC will
detect a single error burst of up to 32 bits.
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Example: #include <ccan/crc/crc.h>
#include <stdio.h>
#include <stdlib.h>
// Given IHATEMATH outputs 0x98a3b8df
int main(int argc, char *argv[])
{
if (argc != 2) {
fprintf(stderr, "Usage: %s <string>\n"
"Prints 32 bit CRC of the string\n", argv[0]);
exit(1);
}
printf("0x%08x\n", crc32c(0, argv[1], strlen(argv[1])));
exit(0);
}
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