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#include "timerlib.h"
#include <stdio.h>
void timerlib_timespec_add(timerlib_timespec_t * a, const timerlib_timespec_t * b)
{
a->tv_sec += b->tv_sec;
a->tv_nsec += b->tv_nsec;
if (a->tv_nsec > TIMERLIB_BILLION_L) {
a->tv_nsec -= TIMERLIB_BILLION_L;
a->tv_sec++;
}
}
void timerlib_timespec_subtract(timerlib_timespec_t * a, const timerlib_timespec_t * b)
{
a->tv_sec -= b->tv_sec;
if (a->tv_nsec < b->tv_nsec) {
a->tv_sec--;
a->tv_nsec += TIMERLIB_BILLION_L - b->tv_nsec;
} else {
a->tv_nsec -= b->tv_nsec;
}
}
void timerlib_timespec_from_double(timerlib_timespec_t * dest, double source)
{
double fractional, integral;
if (source < 0) {
dest->tv_sec = dest->tv_nsec = 0;
return;
}
fractional = modf(source, &integral);
dest->tv_sec = (time_t)integral;
dest->tv_nsec = (long)(fractional * 1e9);
if (dest->tv_nsec >= TIMERLIB_BILLION_L) {
dest->tv_nsec -= TIMERLIB_BILLION_L;
dest->tv_sec ++;
}
}
int timerlib_timer_start_oneshot(timerlib_timer_t *timer, timerlib_timespec_t *duration)
{
timerlib_timespec_t period = {0};
return timerlib_timer_start(timer, &period, duration);
}
int timerlib_timer_start_periodic(timerlib_timer_t *timer, timerlib_timespec_t *period)
{
return timerlib_timer_start(timer, period, period);
}
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