#include "../src/math.c"

#include <stdlib.h>

#include "../src/testing.h"


static void
test_add_size(void) {
	test_start("add_size()");

	size_t val;
	{
		testing("zero values");

		assert(add_size(0U, 0U, &val) == 0);
		assert(val == 0U);

		assert(add_size(1U, 0U, &val) == 0);
		assert(val == 1U);

		assert(add_size(0U, 1U, &val) == 0);
		assert(val == 1U);

		assert(add_size(0U, 3U, &val) == 0);
		assert(val == 3U);

		assert(add_size(30U, 0U, &val) == 0);
		assert(val == 30U);

		test_ok();
	}
	{
		testing("small values");

		assert(add_size(1U, 2U, &val) == 0);
		assert(val == 3U);

		assert(add_size(34U, 56U, &val) == 0);
		assert(val == 90U);

		assert(add_size(121U, 122U, &val) == 0);
		assert(val == 243U);

		test_ok();
	}
	{
		testing("big values");

		assert(add_size(SIZE_MAX, 0U, &val) == 0);
		assert(val == SIZE_MAX);

		assert(add_size(SIZE_MAX - 10U, 3U, &val) == 0);
		assert(val == (SIZE_MAX - 7U));

		test_ok();
	}
	{
		testing("overflowing values");

		val = 0U;
		assert(add_size(SIZE_MAX, 1U, &val) != 0);
		assert(val == 0U);

		test_ok();
	}
}

static void
test_mul_size(void) {
	test_start("mul_size()");

	size_t val;
	{
		testing("zero values");

		assert(mul_size(1U, 1U, &val) == 0);
		assert(val == 1U);

		test_ok();
	}
	{
		testing("small values");

		assert(mul_size(2U, 3U, &val) == 0);
		assert(val == 6U);

		assert(mul_size(10U, 10U, &val) == 0);
		assert(val == 100U);

		assert(mul_size(15U, 15U, &val) == 0);
		assert(val == 225U);

		test_ok();
	}
	{
		testing("big values");

		assert(mul_size(SIZE_MAX, 1U, &val) == 0);
		assert(val == SIZE_MAX);

		assert(mul_size(1U, SIZE_MAX, &val) == 0);
		assert(val == SIZE_MAX);

		assert(mul_size(SIZE_MAX / 2U, 2U, &val) == 0);
		assert(val == SIZE_MAX - 1U);

		test_ok();
	}
	{
		testing("overflowing values");

		val = 123U;

		assert(mul_size(SIZE_MAX, 2U, &val) != 0);
		assert(val == 123U);

		assert(mul_size(3U, SIZE_MAX / 2U, &val) != 0);
		assert(val == 123U);

		test_ok();
	}
}


int
main(void) {
	int rc = EXIT_FAILURE;

	test_add_size();
	test_mul_size();

	rc = EXIT_SUCCESS;
	return rc;
}