Function GetEmptyMask

src/station_cmd.cpp:504–512

* Get a mask of the cargo types that are empty at the station. * @param st Station to query * @return the empty mask */

 * @return the empty mask
 */
CargoTypes GetEmptyMask(const Station *st)
{
	CargoTypes mask = 0;

	for (auto it = std::begin(st->goods); it != std::end(st->goods); ++it) {
		if (it->TotalCount() == 0) SetBit(mask, std::distance(std::begin(st->goods), it));
	}
	return mask;
}

/**
 * Add news item for when a station changes which cargoes it accepts.