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#include "owl.h"
#define OWL_TIMER_DIRECTION_COUNTUP 1
#define OWL_TIMER_DIRECTION_COUNTDOWN 2
/* Create a "counting up" timer. The counter starts running as soon
* as this is called. Use owl_timer_reset() to reset it.
*/
void owl_timer_create_countup(owl_timer *t)
{
t->direction=OWL_TIMER_DIRECTION_COUNTUP;
t->starttime=time(NULL);
}
/* create a "counting down" timer, which counts down from 'start'
* seconds. The counter starts running as soon as this is called.
* Use owl_timer_reset to reset it.
*/
void owl_timer_create_countdown(owl_timer *t, int start)
{
t->direction=OWL_TIMER_DIRECTION_COUNTDOWN;
t->start=start;
t->starttime=time(NULL);
}
/* Reset the timer. For a "counting up" timer, it is reset to 0. For
* a "counting down" timer it is set to the value initially set with
* owl_timer_create_countdown() or the last value set with
* owl_timer_reset_newstart() */
void owl_timer_reset(owl_timer *t)
{
t->starttime=time(NULL);
}
/* Only for a countdown timer. Rest the timer, but this time (and on
* future resets) start with 'start' seconds.
*/
void owl_timer_reset_newstart(owl_timer *t, int start)
{
t->start=start;
t->starttime=time(NULL);
}
/* Return the number of seconds elapsed or remaining. If using a
* countdown timer, a negative value is never reported. Once the
* timer gets to 0 it stays at 0 */
int owl_timer_get_time(owl_timer *t)
{
time_t now;
int rem;
now=time(NULL);
if (t->direction==OWL_TIMER_DIRECTION_COUNTUP) {
return(now-t->starttime);
} else if (t->direction==OWL_TIMER_DIRECTION_COUNTDOWN) {
rem=t->start-(now-t->starttime);
if (rem<0) return(0);
return(rem);
}
/* never reached */
return(0);
}
/* Only for countdown timer. Return true if time has run out (the
* timer is at 0 seconds or less
*/
int owl_timer_is_expired(owl_timer *t)
{
if (owl_timer_get_time(t)==0) return(1);
return(0);
}
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