#include "test/jemalloc_test.h"

void

timer_start(timedelta_t *timer) {

	nstime_init(&timer->t0, 0);

	nstime_update(&timer->t0);

}

void

timer_stop(timedelta_t *timer) {

	nstime_copy(&timer->t1, &timer->t0);

	nstime_update(&timer->t1);

}

uint64_t

timer_usec(const timedelta_t *timer) {

	nstime_t delta;

	nstime_copy(&delta, &timer->t1);

	nstime_subtract(&delta, &timer->t0);

	return nstime_ns(&delta) / 1000;

}

void

timer_ratio(timedelta_t *a, timedelta_t *b, char *buf, size_t buflen) {

	uint64_t t0 = timer_usec(a);

	uint64_t t1 = timer_usec(b);

	uint64_t mult;

	size_t i = 0;

	size_t j, n;

	/* Whole. */

	n = malloc_snprintf(&buf[i], buflen-i, "%"FMTu64, t0 / t1);

	i += n;

	if (i >= buflen) {

		return;

	}

	mult = 1;

	for (j = 0; j < n; j++) {

		mult *= 10;

	}

	/* Decimal. */

	n = malloc_snprintf(&buf[i], buflen-i, ".");

	i += n;

	/* Fraction. */

	while (i < buflen-1) {

		uint64_t round = (i+1 == buflen-1 && ((t0 * mult * 10 / t1) % 10

		    >= 5)) ? 1 : 0;

		n = malloc_snprintf(&buf[i], buflen-i,

		    "%"FMTu64, (t0 * mult / t1) % 10 + round);

		i += n;

		mult *= 10;

	}

}