ccan/ccan/time/test/run.c

#include <ccan/time/time.h>
#include <ccan/time/time.c>
#include <ccan/tap/tap.h>

int main(void)
{
	struct timeabs t1, t2;
	struct timerel t3, t4, zero = { { 0, 0 } };

	plan_tests(66);

	/* Test time_now */
	t1 = time_now();
	t2 = time_now();

	/* Test time_between. */
	t3 = time_between(t2, t1);
	ok1(t3.ts.tv_sec > 0 || t3.ts.tv_nsec >= 0);
	t3 = time_between(t2, t2);
	ok1(t3.ts.tv_sec == 0 && t3.ts.tv_nsec == 0);
	t3 = time_between(t1, t1);
	ok1(t3.ts.tv_sec == 0 && t3.ts.tv_nsec == 0);

	/* Test timeabs_eq / timerel_eq */
	ok1(timeabs_eq(t1, t1));
	ok1(timeabs_eq(t2, t2));
	t3.ts.tv_sec = 0;
	t3.ts.tv_nsec = 1;
	ok1(!timerel_eq(t3, zero));
	ok1(!timerel_eq(t3, zero));

	/* Make sure t2 > t1. */
	t2 = timeabs_add(t2, t3);

	/* Test time_after and time_before. */
	ok1(!timeabs_eq(t1, t2));
	ok1(!time_after(t1, t2));
	ok1(time_before(t1, t2));
	ok1(time_after(t2, t1));
	ok1(!time_before(t2, t1));
	t3.ts.tv_sec = 0;
	t3.ts.tv_nsec = 999999999;
	t2 = timeabs_add(t2, t3);
	ok1(!timeabs_eq(t1, t2));
	ok1(!time_after(t1, t2));
	ok1(time_before(t1, t2));
	ok1(time_after(t2, t1));
	ok1(!time_before(t2, t1));

	/* Test time_less and time_greater. */
	ok1(time_less(zero, t3));
	ok1(!time_greater(zero, t3));
	ok1(!time_less(t3, zero));
	ok1(time_greater(t3, zero));

	/* Test time_sub */
	t3 = time_sub(t3, t3);
	ok1(timerel_eq(t3, zero));

	/* Test time_between */
	t3 = time_between(t2, t2);
	ok1(timerel_eq(t3, zero));
	t3.ts.tv_sec = 0;
	t3.ts.tv_nsec = 999999999;
	t1 = timeabs_add(t2, t3);
	t3 = time_between(t1, t2);
	ok1(t3.ts.tv_sec == 0 && t3.ts.tv_nsec == 999999999);

	/* time_from_sec / time_to_sec */
	t3 = time_from_sec(500);
	ok1(t3.ts.tv_sec == 500);
	ok1(t3.ts.tv_nsec == 0);
	ok1(time_to_sec(t3) == 500);

	/* time_from_msec / time_to_msec */
	t3 = time_from_msec(500);
	ok1(t3.ts.tv_sec == 0);
	ok1(t3.ts.tv_nsec == 500000000);
	ok1(time_to_msec(t3) == 500);

	t3 = time_from_msec(1000);
	ok1(t3.ts.tv_sec == 1);
	ok1(t3.ts.tv_nsec == 0);
	ok1(time_to_msec(t3) == 1000);

	t3 = time_from_msec(1500);
	ok1(t3.ts.tv_sec == 1);
	ok1(t3.ts.tv_nsec == 500000000);
	ok1(time_to_msec(t3) == 1500);

	/* time_from_usec */
	t3 = time_from_usec(500000);
	ok1(t3.ts.tv_sec == 0);
	ok1(t3.ts.tv_nsec == 500000000);
	ok1(time_to_usec(t3) == 500000);

	t3 = time_from_usec(1000000);
	ok1(t3.ts.tv_sec == 1);
	ok1(t3.ts.tv_nsec == 0);
	ok1(time_to_usec(t3) == 1000000);

	t3 = time_from_usec(1500000);
	ok1(t3.ts.tv_sec == 1);
	ok1(t3.ts.tv_nsec == 500000000);
	ok1(time_to_usec(t3) == 1500000);

	/* time_from_nsec */
	t3 = time_from_nsec(500000000);
	ok1(t3.ts.tv_sec == 0);
	ok1(t3.ts.tv_nsec == 500000000);
	ok1(time_to_nsec(t3) == 500000000);

	t3 = time_from_nsec(1000000000);
	ok1(t3.ts.tv_sec == 1);
	ok1(t3.ts.tv_nsec == 0);
	ok1(time_to_nsec(t3) == 1000000000);

	t3 = time_from_nsec(1500000000);
	ok1(t3.ts.tv_sec == 1);
	ok1(t3.ts.tv_nsec == 500000000);
	ok1(time_to_nsec(t3) == 1500000000);

	/* Test wrapunder */
	t1 = timeabs_sub(timeabs_sub(t2, time_from_msec(500)), time_from_msec(500));
	ok1(t1.ts.tv_sec == t2.ts.tv_sec - 1);
	ok1(t1.ts.tv_nsec == t2.ts.tv_nsec);

	/* time_divide and time_multiply */
	t4.ts.tv_nsec = 100;
	t4.ts.tv_sec = 100;

	t3 = time_divide(t4, 2);
	ok1(t3.ts.tv_sec == 50);
	ok1(t3.ts.tv_nsec == 50);

	t3 = time_divide(t4, 100);
	ok1(t3.ts.tv_sec == 1);
	ok1(t3.ts.tv_nsec == 1);

	t3 = time_multiply(t3, 100);
	ok1(timerel_eq(t3, t4));

	t3 = time_divide(t4, 200);
	ok1(t3.ts.tv_sec == 0);
	ok1(t3.ts.tv_nsec == 500000000);

	/* Divide by huge number. */
	t4.ts.tv_sec = (1U << 31) - 1;
	t4.ts.tv_nsec = 999999999;
	t3 = time_divide(t4, 1 << 30);
	/* Allow us to round either way. */
	ok1((t3.ts.tv_sec == 2 && t3.ts.tv_nsec == 0)
	    || (t3.ts.tv_sec == 1 && t3.ts.tv_nsec == 999999999));

	/* Multiply by huge number. */
	t4.ts.tv_sec = 0;
	t4.ts.tv_nsec = 1;
	t3 = time_multiply(t4, 1UL << 31);
	ok1(t3.ts.tv_sec == 2);
	ok1(t3.ts.tv_nsec == 147483648);

	return exit_status();
}