Function attach_egg_hatch_timeout

src/timeout.c:980–1005

Attach an egg hatch timeout to the given egg. * when = Time to hatch, usually only passed if re-creating an * existing hatch timer. Pass 0L for random hatch time. */

 *             existing hatch timer. Pass 0L for random hatch time.
 */
void
attach_egg_hatch_timeout(struct obj *egg, long when)
{
    int i;

    /* stop previous timer, if any */
    (void) stop_timer(HATCH_EGG, obj_to_any(egg));

    /*
     * Decide if and when to hatch the egg.  The old hatch_it() code tried
     * once a turn from age 151 to 200 (inclusive), hatching if it rolled
     * a number x, 1<=x<=age, where x>150.  This yields a chance of
     * hatching > 99.9993%.  Mimic that here.
     */
    if (!when) {
        for (i = (MAX_EGG_HATCH_TIME - 50) + 1; i <= MAX_EGG_HATCH_TIME; i++)
            if (rnd(i) > 150) {
                /* egg will hatch */
                when = (long) i;
                break;
            }
    }
    if (when) {
        (void) start_timer(when, TIMER_OBJECT, HATCH_EGG, obj_to_any(egg));
    }
}

/* prevent an egg from ever hatching */
void