Files @ r13023:9f6499c8d4fb
Branch filter:

Location: cpp/openttd-patchpack/source/src/vehicle_cmd.cpp

rubidium
(svn r17531) -Fix: wrong @file for ai_basestation.hpp
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
/* $Id$ */

/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */

/** @file vehicle_cmd.cpp Commands for vehicles. */

#include "stdafx.h"
#include "roadveh.h"
#include "gfx_func.h"
#include "news_func.h"
#include "airport.h"
#include "command_func.h"
#include "company_func.h"
#include "vehicle_gui.h"
#include "train.h"
#include "aircraft.h"
#include "newgrf_engine.h"
#include "newgrf_text.h"
#include "functions.h"
#include "window_func.h"
#include "vehicle_func.h"
#include "string_func.h"
#include "depot_map.h"
#include "vehiclelist.h"

#include "table/strings.h"

/* Tables used in vehicle.h to find the right command for a certain vehicle type */
const uint32 _veh_build_proc_table[] = {
	CMD_BUILD_RAIL_VEHICLE | CMD_MSG(STR_ERROR_CAN_T_BUY_TRAIN),
	CMD_BUILD_ROAD_VEH     | CMD_MSG(STR_ERROR_CAN_T_BUY_ROAD_VEHICLE),
	CMD_BUILD_SHIP         | CMD_MSG(STR_ERROR_CAN_T_BUY_SHIP),
	CMD_BUILD_AIRCRAFT     | CMD_MSG(STR_ERROR_CAN_T_BUY_AIRCRAFT),
};

const uint32 _veh_sell_proc_table[] = {
	CMD_SELL_RAIL_WAGON | CMD_MSG(STR_ERROR_CAN_T_SELL_TRAIN),
	CMD_SELL_ROAD_VEH   | CMD_MSG(STR_ERROR_CAN_T_SELL_ROAD_VEHICLE),
	CMD_SELL_SHIP       | CMD_MSG(STR_ERROR_CAN_T_SELL_SHIP),
	CMD_SELL_AIRCRAFT   | CMD_MSG(STR_ERROR_CAN_T_SELL_AIRCRAFT),
};

const uint32 _veh_refit_proc_table[] = {
	CMD_REFIT_RAIL_VEHICLE | CMD_MSG(STR_ERROR_CAN_T_REFIT_TRAIN),
	CMD_REFIT_ROAD_VEH     | CMD_MSG(STR_ERROR_CAN_T_REFIT_ROAD_VEHICLE),
	CMD_REFIT_SHIP         | CMD_MSG(STR_ERROR_CAN_T_REFIT_SHIP),
	CMD_REFIT_AIRCRAFT     | CMD_MSG(STR_ERROR_CAN_T_REFIT_AIRCRAFT),
};

const uint32 _send_to_depot_proc_table[] = {
	/* TrainGotoDepot has a nice randomizer in the pathfinder, which causes desyncs... */
	CMD_SEND_TRAIN_TO_DEPOT     | CMD_MSG(STR_ERROR_CAN_T_SEND_TRAIN_TO_DEPOT) | CMD_NO_TEST_IF_IN_NETWORK,
	CMD_SEND_ROADVEH_TO_DEPOT   | CMD_MSG(STR_ERROR_CAN_T_SEND_ROAD_VEHICLE_TO_DEPOT),
	CMD_SEND_SHIP_TO_DEPOT      | CMD_MSG(STR_ERROR_CAN_T_SEND_SHIP_TO_DEPOT),
	CMD_SEND_AIRCRAFT_TO_HANGAR | CMD_MSG(STR_ERROR_CAN_T_SEND_AIRCRAFT_TO_HANGAR),
};

/** Start/Stop a vehicle
 * @param tile unused
 * @param flags type of operation
 * @param p1 vehicle to start/stop
 * @param p2 bit 0: Shall the start/stop newgrf callback be evaluated (only valid with DC_AUTOREPLACE for network safety)
 * @return result of operation.  Nothing if everything went well
 */
CommandCost CmdStartStopVehicle(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
	/* Disable the effect of p2 bit 0, when DC_AUTOREPLACE is not set */
	if ((flags & DC_AUTOREPLACE) == 0) SetBit(p2, 0);

	Vehicle *v = Vehicle::GetIfValid(p1);
	if (v == NULL || !CheckOwnership(v->owner) || !v->IsPrimaryVehicle()) return CMD_ERROR;

	switch (v->type) {
		case VEH_TRAIN:
			if ((v->vehstatus & VS_STOPPED) && Train::From(v)->tcache.cached_power == 0) return_cmd_error(STR_ERROR_TRAIN_START_NO_CATENARY);
			break;

		case VEH_SHIP:
		case VEH_ROAD:
			break;

		case VEH_AIRCRAFT: {
			Aircraft *a = Aircraft::From(v);
			/* cannot stop airplane when in flight, or when taking off / landing */
			if (a->state >= STARTTAKEOFF && a->state < TERM7) return_cmd_error(STR_ERROR_AIRCRAFT_IS_IN_FLIGHT);
		} break;

		default: return CMD_ERROR;
	}

	/* Check if this vehicle can be started/stopped. The callback will fail or
	 * return 0xFF if it can. */
	uint16 callback = GetVehicleCallback(CBID_VEHICLE_START_STOP_CHECK, 0, 0, v->engine_type, v);
	if (callback != CALLBACK_FAILED && GB(callback, 0, 8) != 0xFF && HasBit(p2, 0)) {
		StringID error = GetGRFStringID(GetEngineGRFID(v->engine_type), 0xD000 + callback);
		return_cmd_error(error);
	}

	if (flags & DC_EXEC) {
		if (v->IsStoppedInDepot() && (flags & DC_AUTOREPLACE) == 0) DeleteVehicleNews(p1, STR_NEWS_TRAIN_IS_WAITING + v->type);

		v->vehstatus ^= VS_STOPPED;
		if (v->type != VEH_TRAIN) v->cur_speed = 0; // trains can stop 'slowly'
		InvalidateWindowWidget(WC_VEHICLE_VIEW, v->index, VVW_WIDGET_START_STOP_VEH);
		InvalidateWindow(WC_VEHICLE_DEPOT, v->tile);
		InvalidateWindowClasses(GetWindowClassForVehicleType(v->type));
	}
	return CommandCost();
}

/** Starts or stops a lot of vehicles
 * @param tile Tile of the depot where the vehicles are started/stopped (only used for depots)
 * @param flags type of operation
 * @param p1 Station/Order/Depot ID (only used for vehicle list windows)
 * @param p2 bitmask
 *   - bit 0-4 Vehicle type
 *   - bit 5 false = start vehicles, true = stop vehicles
 *   - bit 6 if set, then it's a vehicle list window, not a depot and Tile is ignored in this case
 *   - bit 8-11 Vehicle List Window type (ignored unless bit 1 is set)
 */
CommandCost CmdMassStartStopVehicle(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
	VehicleList list;
	CommandCost return_value = CMD_ERROR;
	VehicleType vehicle_type = (VehicleType)GB(p2, 0, 5);
	bool start_stop = HasBit(p2, 5);
	bool vehicle_list_window = HasBit(p2, 6);

	if (vehicle_list_window) {
		uint32 id = p1;
		uint16 window_type = p2 & VLW_MASK;

		GenerateVehicleSortList(&list, vehicle_type, _current_company, id, window_type);
	} else {
		/* Get the list of vehicles in the depot */
		BuildDepotVehicleList(vehicle_type, tile, &list, NULL);
	}

	for (uint i = 0; i < list.Length(); i++) {
		const Vehicle *v = list[i];

		if (!!(v->vehstatus & VS_STOPPED) != start_stop) continue;

		if (!vehicle_list_window) {
			if (vehicle_type == VEH_TRAIN) {
				if (CheckTrainInDepot(Train::From(v), false) == -1) continue;
			} else {
				if (!(v->vehstatus & VS_HIDDEN)) continue;
			}
		}

		CommandCost ret = DoCommand(tile, v->index, 0, flags, CMD_START_STOP_VEHICLE);

		if (CmdSucceeded(ret)) {
			return_value = CommandCost();
			/* We know that the command is valid for at least one vehicle.
			 * If we haven't set DC_EXEC, then there is no point in continueing because it will be valid */
			if (!(flags & DC_EXEC)) break;
		}
	}

	return return_value;
}

/** Sells all vehicles in a depot
 * @param tile Tile of the depot where the depot is
 * @param flags type of operation
 * @param p1 Vehicle type
 * @param p2 unused
 */
CommandCost CmdDepotSellAllVehicles(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
	VehicleList list;

	CommandCost cost(EXPENSES_NEW_VEHICLES);
	VehicleType vehicle_type = (VehicleType)GB(p1, 0, 8);
	uint sell_command = GetCmdSellVeh(vehicle_type);

	/* Get the list of vehicles in the depot */
	BuildDepotVehicleList(vehicle_type, tile, &list, &list);

	for (uint i = 0; i < list.Length(); i++) {
		CommandCost ret = DoCommand(tile, list[i]->index, 1, flags, sell_command);
		if (CmdSucceeded(ret)) cost.AddCost(ret);
	}

	if (cost.GetCost() == 0) return CMD_ERROR; // no vehicles to sell
	return cost;
}

/** Autoreplace all vehicles in the depot
 * Note: this command can make incorrect cost estimations
 * Luckily the final price can only drop, not increase. This is due to the fact that
 * estimation can't predict wagon removal so it presumes worst case which is no income from selling wagons.
 * @param tile Tile of the depot where the vehicles are
 * @param flags type of operation
 * @param p1 Type of vehicle
 * @param p2 If bit 0 is set, then either replace all or nothing (instead of replacing until money runs out)
 */
CommandCost CmdDepotMassAutoReplace(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
	VehicleList list;
	CommandCost cost = CommandCost(EXPENSES_NEW_VEHICLES);
	VehicleType vehicle_type = (VehicleType)GB(p1, 0, 8);
	bool all_or_nothing = HasBit(p2, 0);

	if (!IsDepotTile(tile) || !IsTileOwner(tile, _current_company)) return CMD_ERROR;

	/* Get the list of vehicles in the depot */
	BuildDepotVehicleList(vehicle_type, tile, &list, &list, true);

	bool did_something = false;

	for (uint i = 0; i < list.Length(); i++) {
		const Vehicle *v = list[i];

		/* Ensure that the vehicle completely in the depot */
		if (!v->IsInDepot()) continue;

		CommandCost ret = DoCommand(0, v->index, 0, flags, CMD_AUTOREPLACE_VEHICLE);

		if (CmdSucceeded(ret)) {
			did_something = true;
			cost.AddCost(ret);
		} else {
			if (ret.GetErrorMessage() != STR_ERROR_AUTOREPLACE_NOTHING_TO_DO && all_or_nothing) {
				/* We failed to replace a vehicle even though we set all or nothing.
				 * We should never reach this if DC_EXEC is set since then it should
				 * have failed the estimation guess. */
				assert(!(flags & DC_EXEC));
				/* Now we will have to return an error. */
				return CMD_ERROR;
			}
		}
	}

	if (!did_something) {
		/* Either we didn't replace anything or something went wrong.
		 * Either way we want to return an error and not execute this command. */
		cost = CMD_ERROR;
	}

	return cost;
}

/** Test if a name is unique among vehicle names.
 * @param name Name to test.
 * @return True ifffffff the name is unique.
 */
static bool IsUniqueVehicleName(const char *name)
{
	const Vehicle *v;

	FOR_ALL_VEHICLES(v) {
		if (v->name != NULL && strcmp(v->name, name) == 0) return false;
	}

	return true;
}

/** Clone the custom name of a vehicle, adding or incrementing a number.
 * @param src Source vehicle, with a custom name.
 * @param dst Destination vehicle.
 */
static void CloneVehicleName(const Vehicle *src, Vehicle *dst)
{
	char buf[256];

	/* Find the position of the first digit in the last group of digits. */
	size_t number_position;
	for (number_position = strlen(src->name); number_position > 0; number_position--) {
		/* The design of UTF-8 lets this work simply without having to check
		 * for UTF-8 sequences. */
		if (src->name[number_position - 1] < '0' || src->name[number_position - 1] > '9') break;
	}

	/* Format buffer and determine starting number. */
	int num;
	if (number_position == strlen(src->name)) {
		/* No digit at the end, so start at number 2. */
		strecpy(buf, src->name, lastof(buf));
		strecat(buf, " ", lastof(buf));
		number_position = strlen(buf);
		num = 2;
	} else {
		/* Found digits, parse them and start at the next number. */
		strecpy(buf, src->name, lastof(buf));
		buf[number_position] = '\0';
		num = strtol(&src->name[number_position], NULL, 10) + 1;
	}

	/* Check if this name is already taken. */
	for (int max_iterations = 1000; max_iterations > 0; max_iterations--, num++) {
		/* Attach the number to the temporary name. */
		seprintf(&buf[number_position], lastof(buf), "%d", num);

		/* Check the name is unique. */
		if (IsUniqueVehicleName(buf)) {
			dst->name = strdup(buf);
			break;
		}
	}

	/* All done. If we didn't find a name, it'll just use its default. */
}

/** Clone a vehicle. If it is a train, it will clone all the cars too
 * @param tile tile of the depot where the cloned vehicle is build
 * @param flags type of operation
 * @param p1 the original vehicle's index
 * @param p2 1 = shared orders, else copied orders
 */
CommandCost CmdCloneVehicle(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
	CommandCost total_cost(EXPENSES_NEW_VEHICLES);
	uint32 build_argument = 2;

	Vehicle *v = Vehicle::GetIfValid(p1);
	if (v == NULL) return CMD_ERROR;
	Vehicle *v_front = v;
	Vehicle *w = NULL;
	Vehicle *w_front = NULL;
	Vehicle *w_rear = NULL;

	/*
	 * v_front is the front engine in the original vehicle
	 * v is the car/vehicle of the original vehicle, that is currently being copied
	 * w_front is the front engine of the cloned vehicle
	 * w is the car/vehicle currently being cloned
	 * w_rear is the rear end of the cloned train. It's used to add more cars and is only used by trains
	 */

	if (!CheckOwnership(v->owner)) return CMD_ERROR;

	if (v->type == VEH_TRAIN && (!Train::From(v)->IsFrontEngine() || Train::From(v)->crash_anim_pos >= 4400)) return CMD_ERROR;

	/* check that we can allocate enough vehicles */
	if (!(flags & DC_EXEC)) {
		int veh_counter = 0;
		do {
			veh_counter++;
		} while ((v = v->Next()) != NULL);

		if (!Vehicle::CanAllocateItem(veh_counter)) {
			return_cmd_error(STR_ERROR_TOO_MANY_VEHICLES_IN_GAME);
		}
	}

	v = v_front;

	do {
		if (v->type == VEH_TRAIN && Train::From(v)->IsRearDualheaded()) {
			/* we build the rear ends of multiheaded trains with the front ones */
			continue;
		}

		/* In case we're building a multi headed vehicle and the maximum number of
		 * vehicles is almost reached (e.g. max trains - 1) not all vehicles would
		 * be cloned. When the non-primary engines were build they were seen as
		 * 'new' vehicles whereas they would immediately be joined with a primary
		 * engine. This caused the vehicle to be not build as 'the limit' had been
		 * reached, resulting in partially build vehicles and such. */
		DoCommandFlag build_flags = flags;
		if ((flags & DC_EXEC) && !v->IsPrimaryVehicle()) build_flags |= DC_AUTOREPLACE;

		CommandCost cost = DoCommand(tile, v->engine_type, build_argument, build_flags, GetCmdBuildVeh(v));
		build_argument = 3; // ensure that we only assign a number to the first engine

		if (CmdFailed(cost)) {
			/* Can't build a part, then sell the stuff we already made; clear up the mess */
			if (w_front != NULL) DoCommand(w_front->tile, w_front->index, 1, flags, GetCmdSellVeh(w_front));
			return cost;
		}

		total_cost.AddCost(cost);

		if (flags & DC_EXEC) {
			w = Vehicle::Get(_new_vehicle_id);

			if (v->type == VEH_TRAIN && HasBit(Train::From(v)->flags, VRF_REVERSE_DIRECTION)) {
				SetBit(Train::From(w)->flags, VRF_REVERSE_DIRECTION);
			}

			if (v->type == VEH_TRAIN && !Train::From(v)->IsFrontEngine()) {
				/* this s a train car
				 * add this unit to the end of the train */
				CommandCost result = DoCommand(0, (w_rear->index << 16) | w->index, 1, flags, CMD_MOVE_RAIL_VEHICLE);
				if (CmdFailed(result)) {
					/* The train can't be joined to make the same consist as the original.
					 * Sell what we already made (clean up) and return an error.           */
					DoCommand(w_front->tile, w_front->index, 1, flags, GetCmdSellVeh(w_front));
					DoCommand(w_front->tile, w->index,       1, flags, GetCmdSellVeh(w));
					return result; // return error and the message returned from CMD_MOVE_RAIL_VEHICLE
				}
			} else {
				/* this is a front engine or not a train. */
				w_front = w;
				w->service_interval = v->service_interval;
			}
			w_rear = w; // trains needs to know the last car in the train, so they can add more in next loop
		}
	} while (v->type == VEH_TRAIN && (v = Train::From(v)->GetNextVehicle()) != NULL);

	if ((flags & DC_EXEC) && v_front->type == VEH_TRAIN) {
		/* for trains this needs to be the front engine due to the callback function */
		_new_vehicle_id = w_front->index;
	}

	if (flags & DC_EXEC) {
		/* Cloned vehicles belong to the same group */
		DoCommand(0, v_front->group_id, w_front->index, flags, CMD_ADD_VEHICLE_GROUP);
	}


	/* Take care of refitting. */
	w = w_front;
	v = v_front;

	/* Both building and refitting are influenced by newgrf callbacks, which
	 * makes it impossible to accurately estimate the cloning costs. In
	 * particular, it is possible for engines of the same type to be built with
	 * different numbers of articulated parts, so when refitting we have to
	 * loop over real vehicles first, and then the articulated parts of those
	 * vehicles in a different loop. */
	do {
		do {
			if (flags & DC_EXEC) {
				assert(w != NULL);

				if (w->cargo_type != v->cargo_type || w->cargo_subtype != v->cargo_subtype) {
					CommandCost cost = DoCommand(0, w->index, v->cargo_type | (v->cargo_subtype << 8) | 1U << 16 , flags, GetCmdRefitVeh(v));
					if (CmdSucceeded(cost)) total_cost.AddCost(cost);
				}

				if (w->type == VEH_TRAIN && Train::From(w)->HasArticulatedPart()) {
					w = Train::From(w)->GetNextArticPart();
				} else if (w->type == VEH_ROAD && RoadVehicle::From(w)->HasArticulatedPart()) {
					w = w->Next();
				} else {
					break;
				}
			} else {
				const Engine *e = Engine::Get(v->engine_type);
				CargoID initial_cargo = (e->CanCarryCargo() ? e->GetDefaultCargoType() : (CargoID)CT_INVALID);

				if (v->cargo_type != initial_cargo && initial_cargo != CT_INVALID) {
					total_cost.AddCost(GetRefitCost(v->engine_type));
				}
			}

			if (v->type == VEH_TRAIN && Train::From(v)->HasArticulatedPart()) {
				v = Train::From(v)->GetNextArticPart();
			} else if (v->type == VEH_ROAD && RoadVehicle::From(v)->HasArticulatedPart()) {
				v = v->Next();
			} else {
				break;
			}
		} while (v != NULL);

		if ((flags & DC_EXEC) && v->type == VEH_TRAIN) w = Train::From(w)->GetNextVehicle();
	} while (v->type == VEH_TRAIN && (v = Train::From(v)->GetNextVehicle()) != NULL);

	if (flags & DC_EXEC) {
		/*
		 * Set the orders of the vehicle. Cannot do it earlier as we need
		 * the vehicle refitted before doing this, otherwise the moved
		 * cargo types might not match (passenger vs non-passenger)
		 */
		DoCommand(0, (v_front->index << 16) | w_front->index, p2 & 1 ? CO_SHARE : CO_COPY, flags, CMD_CLONE_ORDER);

		/* Now clone the vehicle's name, if it has one. */
		if (v_front->name != NULL) CloneVehicleName(v_front, w_front);
	}

	/* Since we can't estimate the cost of cloning a vehicle accurately we must
	 * check whether the company has enough money manually. */
	if (!CheckCompanyHasMoney(total_cost)) {
		if (flags & DC_EXEC) {
			/* The vehicle has already been bought, so now it must be sold again. */
			DoCommand(w_front->tile, w_front->index, 1, flags, GetCmdSellVeh(w_front));
		}
		return CMD_ERROR;
	}

	return total_cost;
}

/**
 * Send all vehicles of type to depots
 * @param type type of vehicle
 * @param flags the flags used for DoCommand()
 * @param service should the vehicles only get service in the depots
 * @param owner owner of the vehicles to send
 * @param vlw_flag tells what kind of list requested the goto depot
 * @return 0 for success and CMD_ERROR if no vehicle is able to go to depot
 */
CommandCost SendAllVehiclesToDepot(VehicleType type, DoCommandFlag flags, bool service, Owner owner, uint16 vlw_flag, uint32 id)
{
	VehicleList list;

	GenerateVehicleSortList(&list, type, owner, id, vlw_flag);

	/* Send all the vehicles to a depot */
	for (uint i = 0; i < list.Length(); i++) {
		const Vehicle *v = list[i];
		CommandCost ret = DoCommand(v->tile, v->index, (service ? 1 : 0) | DEPOT_DONT_CANCEL, flags, GetCmdSendToDepot(type));

		/* Return 0 if DC_EXEC is not set this is a valid goto depot command)
		 * In this case we know that at least one vehicle can be sent to a depot
		 * and we will issue the command. We can now safely quit the loop, knowing
		 * it will succeed at least once. With DC_EXEC we really need to send them to the depot */
		if (CmdSucceeded(ret) && !(flags & DC_EXEC)) {
			return CommandCost();
		}
	}

	return (flags & DC_EXEC) ? CommandCost() : CMD_ERROR;
}

/** Give a custom name to your vehicle
 * @param tile unused
 * @param flags type of operation
 * @param p1 vehicle ID to name
 * @param p2 unused
 */
CommandCost CmdRenameVehicle(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
	Vehicle *v = Vehicle::GetIfValid(p1);
	if (v == NULL || !CheckOwnership(v->owner)) return CMD_ERROR;

	bool reset = StrEmpty(text);

	if (!reset) {
		if (strlen(text) >= MAX_LENGTH_VEHICLE_NAME_BYTES) return CMD_ERROR;
		if (!(flags & DC_AUTOREPLACE) && !IsUniqueVehicleName(text)) return_cmd_error(STR_ERROR_NAME_MUST_BE_UNIQUE);
	}

	if (flags & DC_EXEC) {
		free(v->name);
		v->name = reset ? NULL : strdup(text);
		InvalidateWindowClassesData(WC_TRAINS_LIST, 1);
		MarkWholeScreenDirty();
	}

	return CommandCost();
}


/** Change the service interval of a vehicle
 * @param tile unused
 * @param flags type of operation
 * @param p1 vehicle ID that is being service-interval-changed
 * @param p2 new service interval
 */
CommandCost CmdChangeServiceInt(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
	Vehicle *v = Vehicle::GetIfValid(p1);
	if (v == NULL || !CheckOwnership(v->owner)) return CMD_ERROR;

	uint16 serv_int = GetServiceIntervalClamped(p2, v->owner); // Double check the service interval from the user-input
	if (serv_int != p2) return CMD_ERROR;

	if (flags & DC_EXEC) {
		v->service_interval = serv_int;
		InvalidateWindow(WC_VEHICLE_DETAILS, v->index);
	}

	return CommandCost();
}