path: root/doubletotimespec.c

/* See LICENSE file for copyright and license details. */
#include "libsimple.h"


void
libsimple_doubletotimespec(struct timespec *ts, double d)
{
	double ns = (long long int)d;
	long int nsi;
	ns = d - ns;
	ns *= (double)1000000000L;
	nsi = (long int)ns;
	if (2 * (ns - (double)nsi) >= 1) {
		nsi += 1;
		if (nsi == 1000000000L) {
			nsi = 0;
			d += 1;
		}
	} else if (2 * (ns - (double)nsi) <= -1) {
		nsi -= 1;
		if (nsi == -1000000000L) {
			nsi = 0;
			d -= 1;
		}
	}
	ts->tv_sec = (time_t)d;
	ts->tv_nsec = nsi;
	if (ts->tv_nsec < 0) {
		ts->tv_sec -= 1;
		ts->tv_nsec += 1000000000L;
	}
}