/**
* Copy head specific things to the new vehicle chain after it was successfully constructed
* @param old_head The old front vehicle (no wagons attached anymore)
* @param new_head The new head of the completely replaced vehicle chain
* @param flags the command flags to use
*/
static CommandCost CopyHeadSpecificThings(Vehicle *old_head, Vehicle *new_head, DoCommandFlag flags)
{
CommandCost cost = CommandCost();
/* Share orders */
if (cost.Succeeded() && old_head != new_head) cost.AddCost(DoCommand(0, new_head->index | CO_SHARE << 30, old_head->index, DC_EXEC, CMD_CLONE_ORDER));
/* Copy group membership */
if (cost.Succeeded() && old_head != new_head) cost.AddCost(DoCommand(0, old_head->group_id, new_head->index, DC_EXEC, CMD_ADD_VEHICLE_GROUP));
/* Perform start/stop check whether the new vehicle suits newgrf restrictions etc. */
if (cost.Succeeded()) {
/* Start the vehicle, might be denied by certain things */
assert((new_head->vehstatus & VS_STOPPED) != 0);
cost.AddCost(CmdStartStopVehicle(new_head, true));
/* Stop the vehicle again, but do not care about evil newgrfs allowing starting but not stopping :p */
if (cost.Succeeded()) cost.AddCost(CmdStartStopVehicle(new_head, false));
}
/* Last do those things which do never fail (resp. we do not care about), but which are not undo-able */
if (cost.Succeeded() && old_head != new_head && (flags & DC_EXEC) != 0) {
/* Copy other things which cannot be copied by a command and which shall not stay resetted from the build vehicle command */
new_head->CopyVehicleConfigAndStatistics(old_head);
/* Switch vehicle windows/news to the new vehicle, so they are not closed/deleted when the old vehicle is sold */
ChangeVehicleViewports(old_head->index, new_head->index);
ChangeVehicleViewWindow(old_head->index, new_head->index);
ChangeVehicleNews(old_head->index, new_head->index);
}
return cost;
}
/**
* Build a ship depot.
* @param tile tile where ship depot is built
* @param flags type of operation
* @param p1 bit 0 depot orientation (Axis)
* @param p2 unused
* @param text unused
* @return the cost of this operation or an error
*/
CommandCost CmdBuildShipDepot(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
Axis axis = Extract<Axis, 0, 1>(p1);
TileIndex tile2 = tile + (axis == AXIS_X ? TileDiffXY(1, 0) : TileDiffXY(0, 1));
if (!HasTileWaterGround(tile) || !HasTileWaterGround(tile2)) {
return_cmd_error(STR_ERROR_MUST_BE_BUILT_ON_WATER);
}
if ((MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) ||
(MayHaveBridgeAbove(tile2) && IsBridgeAbove(tile2))) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
if (!IsTileFlat(tile) || !IsTileFlat(tile2)) {
/* Prevent depots on rapids */
return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
}
if (!Depot::CanAllocateItem()) return CMD_ERROR;
WaterClass wc1 = GetWaterClass(tile);
WaterClass wc2 = GetWaterClass(tile2);
CommandCost cost = CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_DEPOT_SHIP]);
bool add_cost = !IsWaterTile(tile);
CommandCost ret = DoCommand(tile, 0, 0, flags | DC_AUTO, CMD_LANDSCAPE_CLEAR);
if (ret.Failed()) return ret;
if (add_cost) {
cost.AddCost(ret);
}
add_cost = !IsWaterTile(tile2);
ret = DoCommand(tile2, 0, 0, flags | DC_AUTO, CMD_LANDSCAPE_CLEAR);
if (ret.Failed()) return ret;
if (add_cost) {
cost.AddCost(ret);
}
if (flags & DC_EXEC) {
Depot *depot = new Depot(tile);
depot->build_date = _date;
if (wc1 == WATER_CLASS_CANAL || wc2 == WATER_CLASS_CANAL) {
/* Update infrastructure counts after the unconditional clear earlier. */
Company::Get(_current_company)->infrastructure.water += wc1 == WATER_CLASS_CANAL && wc2 == WATER_CLASS_CANAL ? 2 : 1;
}
Company::Get(_current_company)->infrastructure.water += 2 * LOCK_DEPOT_TILE_FACTOR;
DirtyCompanyInfrastructureWindows(_current_company);
MakeShipDepot(tile, _current_company, depot->index, DEPOT_PART_NORTH, axis, wc1);
MakeShipDepot(tile2, _current_company, depot->index, DEPOT_PART_SOUTH, axis, wc2);
MarkTileDirtyByTile(tile);
MarkTileDirtyByTile(tile2);
MakeDefaultName(depot);
}
return cost;
}
/**
* Build a ship depot.
* @param tile tile where ship depot is built
* @param flags type of operation
* @param p1 bit 0 depot orientation (Axis)
* @param p2 unused
* @param text unused
* @return the cost of this operation or an error
*/
CommandCost CmdBuildShipDepot(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
Axis axis = Extract<Axis, 0, 1>(p1);
TileIndex tile2 = tile + (axis == AXIS_X ? TileDiffXY(1, 0) : TileDiffXY(0, 1));
if (!HasTileWaterGround(tile) || !HasTileWaterGround(tile2)) {
return_cmd_error(STR_ERROR_MUST_BE_BUILT_ON_WATER);
}
if ((MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) ||
(MayHaveBridgeAbove(tile2) && IsBridgeAbove(tile2))) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
if (GetTileSlope(tile, NULL) != SLOPE_FLAT || GetTileSlope(tile2, NULL) != SLOPE_FLAT) {
/* Prevent depots on rapids */
return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
}
if (!Depot::CanAllocateItem()) return CMD_ERROR;
WaterClass wc1 = GetWaterClass(tile);
WaterClass wc2 = GetWaterClass(tile2);
CommandCost cost = CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_DEPOT_SHIP]);
bool add_cost = !IsWaterTile(tile);
CommandCost ret = DoCommand(tile, 0, 0, flags | DC_AUTO, CMD_LANDSCAPE_CLEAR);
if (ret.Failed()) return ret;
if (add_cost) {
cost.AddCost(ret);
}
add_cost = !IsWaterTile(tile2);
ret = DoCommand(tile2, 0, 0, flags | DC_AUTO, CMD_LANDSCAPE_CLEAR);
if (ret.Failed()) return ret;
if (add_cost) {
cost.AddCost(ret);
}
if (flags & DC_EXEC) {
Depot *depot = new Depot(tile);
depot->build_date = _date;
MakeShipDepot(tile, _current_company, depot->index, DEPOT_NORTH, axis, wc1);
MakeShipDepot(tile2, _current_company, depot->index, DEPOT_SOUTH, axis, wc2);
MarkTileDirtyByTile(tile);
MarkTileDirtyByTile(tile2);
MakeDefaultName(depot);
}
return cost;
}
/**
* Replace a single unit in a free wagon chain
* @param single_unit vehicle to let autoreplace/renew operator on
* @param flags command flags
* @param nothing_to_do is set to 'false' when something was done (only valid when not failed)
* @return cost or error
*/
static CommandCost ReplaceFreeUnit(Vehicle **single_unit, DoCommandFlag flags, bool *nothing_to_do)
{
Train *old_v = Train::From(*single_unit);
assert(!old_v->IsArticulatedPart() && !old_v->IsRearDualheaded());
CommandCost cost = CommandCost(EXPENSES_NEW_VEHICLES, 0);
/* Build and refit replacement vehicle */
Vehicle *new_v = NULL;
cost.AddCost(BuildReplacementVehicle(old_v, &new_v, false));
/* Was a new vehicle constructed? */
if (cost.Succeeded() && new_v != NULL) {
*nothing_to_do = false;
if ((flags & DC_EXEC) != 0) {
/* Move the new vehicle behind the old */
CmdMoveVehicle(new_v, old_v, DC_EXEC, false);
/* Take over cargo
* Note: We do only transfer cargo from the old to the new vehicle.
* I.e. we do not transfer remaining cargo to other vehicles.
* Else you would also need to consider moving cargo to other free chains,
* or doing the same in ReplaceChain(), which would be quite troublesome.
*/
TransferCargo(old_v, new_v, false);
*single_unit = new_v;
}
/* Sell the old vehicle */
cost.AddCost(DoCommand(0, old_v->index, 0, flags, GetCmdSellVeh(old_v)));
/* If we are not in DC_EXEC undo everything */
if ((flags & DC_EXEC) == 0) {
DoCommand(0, new_v->index, 0, DC_EXEC, GetCmdSellVeh(new_v));
}
}
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)
* @param text unused
* @return the cost of this operation or an error
*/
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;
}
/**
* Builds and refits a replacement vehicle
* Important: The old vehicle is still in the original vehicle chain (used for determining the cargo when the old vehicle did not carry anything, but the new one does)
* @param old_veh A single (articulated/multiheaded) vehicle that shall be replaced.
* @param new_vehicle Returns the newly build and refittet vehicle
* @param part_of_chain The vehicle is part of a train
* @return cost or error
*/
static CommandCost BuildReplacementVehicle(Vehicle *old_veh, Vehicle **new_vehicle, bool part_of_chain)
{
*new_vehicle = NULL;
/* Shall the vehicle be replaced? */
const Company *c = Company::Get(_current_company);
EngineID e;
CommandCost cost = GetNewEngineType(old_veh, c, e);
if (cost.Failed()) return cost;
if (e == INVALID_ENGINE) return CommandCost(); // neither autoreplace is set, nor autorenew is triggered
/* Does it need to be refitted */
CargoID refit_cargo = GetNewCargoTypeForReplace(old_veh, e, part_of_chain);
if (refit_cargo == CT_INVALID) return CommandCost(); // incompatible cargoes
/* Build the new vehicle */
cost = DoCommand(old_veh->tile, e, 0, DC_EXEC | DC_AUTOREPLACE, GetCmdBuildVeh(old_veh));
if (cost.Failed()) return cost;
Vehicle *new_veh = Vehicle::Get(_new_vehicle_id);
*new_vehicle = new_veh;
/* Refit the vehicle if needed */
if (refit_cargo != CT_NO_REFIT) {
byte subtype = GetBestFittingSubType(old_veh, new_veh, refit_cargo);
cost.AddCost(DoCommand(0, new_veh->index, refit_cargo | (subtype << 8), DC_EXEC, GetCmdRefitVeh(new_veh)));
assert(cost.Succeeded()); // This should be ensured by GetNewCargoTypeForReplace()
}
/* Try to reverse the vehicle, but do not care if it fails as the new type might not be reversible */
if (new_veh->type == VEH_TRAIN && HasBit(Train::From(old_veh)->flags, VRF_REVERSE_DIRECTION)) {
DoCommand(0, new_veh->index, true, DC_EXEC, CMD_REVERSE_TRAIN_DIRECTION);
}
return cost;
}
/**
* Autoreplace all vehicles in the depot
* @param tile Tile of the depot where the vehicles are
* @param flags type of operation
* @param p1 Type of vehicle
* @param p2 unused
* @param text unused
* @return the cost of this operation or an error
*/
CommandCost CmdDepotMassAutoReplace(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
VehicleList list;
CommandCost cost = CommandCost(EXPENSES_NEW_VEHICLES);
VehicleType vehicle_type = Extract<VehicleType, 0, 3>(p1);
if (!IsCompanyBuildableVehicleType(vehicle_type)) return CMD_ERROR;
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);
for (uint i = 0; i < list.Length(); i++) {
const Vehicle *v = list[i];
/* Ensure that the vehicle completely in the depot */
if (!v->IsChainInDepot()) continue;
CommandCost ret = DoCommand(0, v->index, 0, flags, CMD_AUTOREPLACE_VEHICLE);
if (ret.Succeeded()) cost.AddCost(ret);
}
return cost;
}
/**
* Autoreplaces a vehicle
* Trains are replaced as a whole chain, free wagons in depot are replaced on their own
* @param tile not used
* @param flags type of operation
* @param p1 Index of vehicle
* @param p2 not used
* @param text unused
* @return the cost of this operation or an error
*/
CommandCost CmdAutoreplaceVehicle(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
Vehicle *v = Vehicle::GetIfValid(p1);
if (v == NULL) return CMD_ERROR;
CommandCost ret = CheckOwnership(v->owner);
if (ret.Failed()) return ret;
if (!v->IsInDepot()) return CMD_ERROR;
if (v->vehstatus & VS_CRASHED) return CMD_ERROR;
bool free_wagon = false;
if (v->type == VEH_TRAIN) {
Train *t = Train::From(v);
if (t->IsArticulatedPart() || t->IsRearDualheaded()) return CMD_ERROR;
free_wagon = !t->IsFrontEngine();
if (free_wagon && t->First()->IsFrontEngine()) return CMD_ERROR;
} else {
if (!v->IsPrimaryVehicle()) return CMD_ERROR;
}
const Company *c = Company::Get(_current_company);
bool wagon_removal = c->settings.renew_keep_length;
/* Test whether any replacement is set, before issuing a whole lot of commands that would end in nothing changed */
Vehicle *w = v;
bool any_replacements = false;
while (w != NULL) {
EngineID e;
CommandCost cost = GetNewEngineType(w, c, e);
if (cost.Failed()) return cost;
any_replacements |= (e != INVALID_ENGINE);
w = (!free_wagon && w->type == VEH_TRAIN ? Train::From(w)->GetNextUnit() : NULL);
}
CommandCost cost = CommandCost(EXPENSES_NEW_VEHICLES, 0);
bool nothing_to_do = true;
if (any_replacements) {
bool was_stopped = free_wagon || ((v->vehstatus & VS_STOPPED) != 0);
/* Stop the vehicle */
if (!was_stopped) cost.AddCost(CmdStartStopVehicle(v, true));
if (cost.Failed()) return cost;
assert(v->IsStoppedInDepot());
/* We have to construct the new vehicle chain to test whether it is valid.
* Vehicle construction needs random bits, so we have to save the random seeds
* to prevent desyncs and to replay newgrf callbacks during DC_EXEC */
SavedRandomSeeds saved_seeds;
SaveRandomSeeds(&saved_seeds);
if (free_wagon) {
cost.AddCost(ReplaceFreeUnit(&v, flags & ~DC_EXEC, ¬hing_to_do));
} else {
cost.AddCost(ReplaceChain(&v, flags & ~DC_EXEC, wagon_removal, ¬hing_to_do));
}
RestoreRandomSeeds(saved_seeds);
if (cost.Succeeded() && (flags & DC_EXEC) != 0) {
CommandCost ret;
if (free_wagon) {
ret = ReplaceFreeUnit(&v, flags, ¬hing_to_do);
} else {
ret = ReplaceChain(&v, flags, wagon_removal, ¬hing_to_do);
}
assert(ret.Succeeded() && ret.GetCost() == cost.GetCost());
}
/* Restart the vehicle */
if (!was_stopped) cost.AddCost(CmdStartStopVehicle(v, false));
}
if (cost.Succeeded() && nothing_to_do) cost = CommandCost(STR_ERROR_AUTOREPLACE_NOTHING_TO_DO);
return cost;
}
/**
* Replace a whole vehicle chain
* @param chain vehicle chain to let autoreplace/renew operator on
* @param flags command flags
* @param wagon_removal remove wagons when the resulting chain occupies more tiles than the old did
* @param nothing_to_do is set to 'false' when something was done (only valid when not failed)
* @return cost or error
*/
static CommandCost ReplaceChain(Vehicle **chain, DoCommandFlag flags, bool wagon_removal, bool *nothing_to_do)
{
Vehicle *old_head = *chain;
assert(old_head->IsPrimaryVehicle());
CommandCost cost = CommandCost(EXPENSES_NEW_VEHICLES, 0);
if (old_head->type == VEH_TRAIN) {
/* Store the length of the old vehicle chain, rounded up to whole tiles */
uint16 old_total_length = CeilDiv(Train::From(old_head)->gcache.cached_total_length, TILE_SIZE) * TILE_SIZE;
int num_units = 0; ///< Number of units in the chain
for (Train *w = Train::From(old_head); w != NULL; w = w->GetNextUnit()) num_units++;
Train **old_vehs = CallocT<Train *>(num_units); ///< Will store vehicles of the old chain in their order
Train **new_vehs = CallocT<Train *>(num_units); ///< New vehicles corresponding to old_vehs or NULL if no replacement
Money *new_costs = MallocT<Money>(num_units); ///< Costs for buying and refitting the new vehicles
/* Collect vehicles and build replacements
* Note: The replacement vehicles can only successfully build as long as the old vehicles are still in their chain */
int i;
Train *w;
for (w = Train::From(old_head), i = 0; w != NULL; w = w->GetNextUnit(), i++) {
assert(i < num_units);
old_vehs[i] = w;
CommandCost ret = BuildReplacementVehicle(old_vehs[i], (Vehicle**)&new_vehs[i], true);
cost.AddCost(ret);
if (cost.Failed()) break;
new_costs[i] = ret.GetCost();
if (new_vehs[i] != NULL) *nothing_to_do = false;
}
Train *new_head = (new_vehs[0] != NULL ? new_vehs[0] : old_vehs[0]);
/* Note: When autoreplace has already failed here, old_vehs[] is not completely initialized. But it is also not needed. */
if (cost.Succeeded()) {
/* Separate the head, so we can start constructing the new chain */
Train *second = Train::From(old_head)->GetNextUnit();
if (second != NULL) cost.AddCost(CmdMoveVehicle(second, NULL, DC_EXEC | DC_AUTOREPLACE, true));
assert(Train::From(new_head)->GetNextUnit() == NULL);
/* Append engines to the new chain
* We do this from back to front, so that the head of the temporary vehicle chain does not change all the time.
* That way we also have less trouble when exceeding the unitnumber limit.
* OTOH the vehicle attach callback is more expensive this way :s */
Train *last_engine = NULL; ///< Shall store the last engine unit after this step
if (cost.Succeeded()) {
for (int i = num_units - 1; i > 0; i--) {
Train *append = (new_vehs[i] != NULL ? new_vehs[i] : old_vehs[i]);
if (RailVehInfo(append->engine_type)->railveh_type == RAILVEH_WAGON) continue;
if (new_vehs[i] != NULL) {
/* Move the old engine to a separate row with DC_AUTOREPLACE. Else
* moving the wagon in front may fail later due to unitnumber limit.
* (We have to attach wagons without DC_AUTOREPLACE.) */
CmdMoveVehicle(old_vehs[i], NULL, DC_EXEC | DC_AUTOREPLACE, false);
}
if (last_engine == NULL) last_engine = append;
cost.AddCost(CmdMoveVehicle(append, new_head, DC_EXEC, false));
if (cost.Failed()) break;
}
if (last_engine == NULL) last_engine = new_head;
}
/* When wagon removal is enabled and the new engines without any wagons are already longer than the old, we have to fail */
if (cost.Succeeded() && wagon_removal && new_head->gcache.cached_total_length > old_total_length) cost = CommandCost(STR_ERROR_TRAIN_TOO_LONG_AFTER_REPLACEMENT);
/* Append/insert wagons into the new vehicle chain
* We do this from back to front, so we can stop when wagon removal or maximum train length (i.e. from mammoth-train setting) is triggered.
*/
if (cost.Succeeded()) {
for (int i = num_units - 1; i > 0; i--) {
assert(last_engine != NULL);
Vehicle *append = (new_vehs[i] != NULL ? new_vehs[i] : old_vehs[i]);
if (RailVehInfo(append->engine_type)->railveh_type == RAILVEH_WAGON) {
/* Insert wagon after 'last_engine' */
CommandCost res = CmdMoveVehicle(append, last_engine, DC_EXEC, false);
/* When we allow removal of wagons, either the move failing due
* to the train becoming too long, or the train becoming longer
* would move the vehicle to the empty vehicle chain. */
if (wagon_removal && (res.Failed() ? res.GetErrorMessage() == STR_ERROR_TRAIN_TOO_LONG : new_head->gcache.cached_total_length > old_total_length)) {
CmdMoveVehicle(append, NULL, DC_EXEC | DC_AUTOREPLACE, false);
break;
}
cost.AddCost(res);
if (cost.Failed()) break;
} else {
/* We have reached 'last_engine', continue with the next engine towards the front */
assert(append == last_engine);
last_engine = last_engine->GetPrevUnit();
}
}
}
/* Sell superfluous new vehicles that could not be inserted. */
if (cost.Succeeded() && wagon_removal) {
assert(new_head->gcache.cached_total_length <= _settings_game.vehicle.max_train_length * TILE_SIZE);
for (int i = 1; i < num_units; i++) {
Vehicle *wagon = new_vehs[i];
if (wagon == NULL) continue;
if (wagon->First() == new_head) break;
assert(RailVehInfo(wagon->engine_type)->railveh_type == RAILVEH_WAGON);
/* Sell wagon */
CommandCost ret = DoCommand(0, wagon->index, 0, DC_EXEC, GetCmdSellVeh(wagon));
assert(ret.Succeeded());
new_vehs[i] = NULL;
/* Revert the money subtraction when the vehicle was built.
* This value is different from the sell value, esp. because of refitting */
cost.AddCost(-new_costs[i]);
}
}
/* The new vehicle chain is constructed, now take over orders and everything... */
if (cost.Succeeded()) cost.AddCost(CopyHeadSpecificThings(old_head, new_head, flags));
if (cost.Succeeded()) {
/* Success ! */
if ((flags & DC_EXEC) != 0 && new_head != old_head) {
*chain = new_head;
}
/* Transfer cargo of old vehicles and sell them */
for (int i = 0; i < num_units; i++) {
Vehicle *w = old_vehs[i];
/* Is the vehicle again part of the new chain?
* Note: We cannot test 'new_vehs[i] != NULL' as wagon removal might cause to remove both */
if (w->First() == new_head) continue;
if ((flags & DC_EXEC) != 0) TransferCargo(w, new_head, true);
/* Sell the vehicle.
* Note: This might temporarly construct new trains, so use DC_AUTOREPLACE to prevent
* it from failing due to engine limits. */
cost.AddCost(DoCommand(0, w->index, 0, flags | DC_AUTOREPLACE, GetCmdSellVeh(w)));
if ((flags & DC_EXEC) != 0) {
old_vehs[i] = NULL;
if (i == 0) old_head = NULL;
}
}
if ((flags & DC_EXEC) != 0) CheckCargoCapacity(new_head);
}
/* If we are not in DC_EXEC undo everything, i.e. rearrange old vehicles.
* We do this from back to front, so that the head of the temporary vehicle chain does not change all the time.
* Note: The vehicle attach callback is disabled here :) */
if ((flags & DC_EXEC) == 0) {
/* Separate the head, so we can reattach the old vehicles */
Train *second = Train::From(old_head)->GetNextUnit();
if (second != NULL) CmdMoveVehicle(second, NULL, DC_EXEC | DC_AUTOREPLACE, true);
assert(Train::From(old_head)->GetNextUnit() == NULL);
for (int i = num_units - 1; i > 0; i--) {
CommandCost ret = CmdMoveVehicle(old_vehs[i], old_head, DC_EXEC | DC_AUTOREPLACE, false);
assert(ret.Succeeded());
}
}
}
/* Finally undo buying of new vehicles */
if ((flags & DC_EXEC) == 0) {
for (int i = num_units - 1; i >= 0; i--) {
if (new_vehs[i] != NULL) {
DoCommand(0, new_vehs[i]->index, 0, DC_EXEC, GetCmdSellVeh(new_vehs[i]));
new_vehs[i] = NULL;
}
}
}
free(old_vehs);
free(new_vehs);
free(new_costs);
} else {
/* Build and refit replacement vehicle */
Vehicle *new_head = NULL;
cost.AddCost(BuildReplacementVehicle(old_head, &new_head, true));
/* Was a new vehicle constructed? */
if (cost.Succeeded() && new_head != NULL) {
*nothing_to_do = false;
/* The new vehicle is constructed, now take over orders and everything... */
cost.AddCost(CopyHeadSpecificThings(old_head, new_head, flags));
if (cost.Succeeded()) {
/* The new vehicle is constructed, now take over cargo */
if ((flags & DC_EXEC) != 0) {
TransferCargo(old_head, new_head, true);
*chain = new_head;
}
/* Sell the old vehicle */
cost.AddCost(DoCommand(0, old_head->index, 0, flags, GetCmdSellVeh(old_head)));
}
/* If we are not in DC_EXEC undo everything */
if ((flags & DC_EXEC) == 0) {
DoCommand(0, new_head->index, 0, DC_EXEC, GetCmdSellVeh(new_head));
}
}
}
return cost;
}
