crc32_test.c

#include "sc_crc32.h"

#include <assert.h>

int main(int argc, char *argv[])
{
	(void) argc;
	(void) argv;

	uint32_t crc1, crc2, crc3;
	char buf[128] = {1, 1, 2, 3};
	char buf2[4096 * 8] = {2, 5, 6, 5};

	sc_crc32_init();

	// pre-computed values
	assert(sc_crc32(0, "", 1) == 1383945041);
	assert(sc_crc32(0, "1", 2) == 2727214374);
	assert(sc_crc32(0, "\0\0\0\0\0\0\0\0\0\0", 10) == 3822973035);
	assert(sc_crc32(0, "test", 5) == 2440484327);
	assert(sc_crc32(0, "testtest", 9) == 443192409);

	crc1 = sc_crc32(0, buf, 100);
	crc2 = sc_crc32(crc1, buf + 100, 28);
	crc3 = sc_crc32(0, buf, 128);

	assert(crc2 == crc3);

	crc1 = sc_crc32(0, buf2, 4096 * 4);
	crc2 = sc_crc32(crc1, buf2 + (4096 * 4), 4096 * 4);
	crc3 = sc_crc32(0, buf2, 4096 * 8);

	assert(crc2 == crc3);

	crc1 = sc_crc32(100, buf, 8);
	crc2 = sc_crc32(100, buf, 7);
	assert(crc1 != crc2);

	crc2 = sc_crc32(100, buf + 7, 7);
	assert(crc1 != crc2);

	crc2 = sc_crc32(100, buf + 8, 7);
	assert(crc1 != crc2);

	crc2 = sc_crc32(100, buf + 8, 8);
	assert(crc1 != crc2);

	crc2 = sc_crc32(100, buf + 8, 0);
	assert(crc1 != crc2);
}