Method UseID

src/vehicle.cpp:1844–1855

* Use a unit number. If the unit number is not valid it is ignored. * @param index Unit number to use. * @returns Unit number used. */

 * @returns Unit number used.
 */
UnitID FreeUnitIDGenerator::UseID(UnitID index)
{
	if (index == 0 || index == UINT16_MAX) return index;

	index--;

	size_t slot = index / BITMAP_SIZE;
	if (slot >= this->used_bitmap.size()) this->used_bitmap.resize(slot + 1);
	SetBit(this->used_bitmap[index / BITMAP_SIZE], index % BITMAP_SIZE);

	return index + 1;
}

/**
 * Release a unit number. If the unit number is not valid it is ignored.