cal-recur

gboolean    (*CalRecurInstanceFn)           (CalComponent *comp,
                                             time_t instance_start,
                                             time_t instance_end,
                                             gpointer data);

void        cal_recur_generate_instances    (CalComponent *comp,
                                             time_t start,
                                             time_t end,
                                             CalRecurInstanceFn cb,
                                             gpointer cb_data,
                                             CalRecurResolveTimezoneFn tz_cb,
                                             gpointer tz_cb_data,
                                             icaltimezone *default_timezone);