292 }

   293 

   294 /** Start/Stop a road vehicle.

   295  * @param tile unused

   296  * @param flags operation to perform

   297  * @param p1 road vehicle ID to start/stop

   298  * @param p2 unused

   299  */

   300 CommandCost CmdStartStopRoadVeh(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

   301 {

   302 	if (!IsValidVehicleID(p1)) return CMD_ERROR;

   303 

   304 	Vehicle *v = GetVehicle(p1);

   305 

   306 	if (v->type != VEH_ROAD || !CheckOwnership(v->owner)) return CMD_ERROR;

   307 

   308 	/* Check if this road veh can be started/stopped. The callback will fail or

   309 	 * return 0xFF if it can. */

   310 	uint16 callback = GetVehicleCallback(CBID_VEHICLE_START_STOP_CHECK, 0, 0, v->engine_type, v);

   311 	if (callback != CALLBACK_FAILED && GB(callback, 0, 8) != 0xFF) {

   312 		StringID error = GetGRFStringID(GetEngineGRFID(v->engine_type), 0xD000 + callback);

   313 		return_cmd_error(error);

   314 	}

   315 

   316 	if (flags & DC_EXEC) {

   317 		if (v->IsStoppedInDepot()) {

   318 			DeleteVehicleNews(p1, STR_9016_ROAD_VEHICLE_IS_WAITING);

   319 		}

   320 

   321 		v->vehstatus ^= VS_STOPPED;

   322 		v->cur_speed = 0;

   323 		InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, VVW_WIDGET_START_STOP_VEH);

   324 		InvalidateWindow(WC_VEHICLE_DEPOT, v->tile);

   325 	}

   326 

   327 	return CommandCost();