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00012 #include "stdafx.h"
00013 #include "company_func.h"
00014 #include "train.h"
00015 #include "command_func.h"
00016 #include "engine_func.h"
00017 #include "vehicle_func.h"
00018 #include "autoreplace_func.h"
00019 #include "autoreplace_gui.h"
00020 #include "group.h"
00021 #include "articulated_vehicles.h"
00022 #include "core/random_func.hpp"
00023
00024 #include "table/strings.h"
00025
00026 extern void ChangeVehicleViewports(VehicleID from_index, VehicleID to_index);
00027 extern void ChangeVehicleNews(VehicleID from_index, VehicleID to_index);
00028 extern void ChangeVehicleViewWindow(VehicleID from_index, VehicleID to_index);
00029
00037 static bool EnginesHaveCargoInCommon(EngineID engine_a, EngineID engine_b)
00038 {
00039 uint32 available_cargos_a = GetUnionOfArticulatedRefitMasks(engine_a, true);
00040 uint32 available_cargos_b = GetUnionOfArticulatedRefitMasks(engine_b, true);
00041 return (available_cargos_a == 0 || available_cargos_b == 0 || (available_cargos_a & available_cargos_b) != 0);
00042 }
00043
00051 bool CheckAutoreplaceValidity(EngineID from, EngineID to, CompanyID company)
00052 {
00053 assert(Engine::IsValidID(from) && Engine::IsValidID(to));
00054
00055
00056 if (from == to) return false;
00057
00058 const Engine *e_from = Engine::Get(from);
00059 const Engine *e_to = Engine::Get(to);
00060 VehicleType type = e_from->type;
00061
00062
00063 if (!IsEngineBuildable(to, type, company)) return false;
00064
00065 switch (type) {
00066 case VEH_TRAIN: {
00067
00068 if ((GetRailTypeInfo(e_from->u.rail.railtype)->compatible_railtypes & GetRailTypeInfo(e_to->u.rail.railtype)->compatible_railtypes) == 0) return false;
00069
00070
00071 if ((e_from->u.rail.railveh_type == RAILVEH_WAGON) != (e_to->u.rail.railveh_type == RAILVEH_WAGON)) return false;
00072 break;
00073 }
00074
00075 case VEH_ROAD:
00076
00077 if (HasBit(e_from->info.misc_flags, EF_ROAD_TRAM) != HasBit(e_to->info.misc_flags, EF_ROAD_TRAM)) return false;
00078 break;
00079
00080 case VEH_AIRCRAFT:
00081
00082 if ((e_from->u.air.subtype & AIR_CTOL) != (e_to->u.air.subtype & AIR_CTOL)) return false;
00083 break;
00084
00085 default: break;
00086 }
00087
00088
00089 return EnginesHaveCargoInCommon(from, to);
00090 }
00091
00098 static void TransferCargo(Vehicle *old_veh, Vehicle *new_head, bool part_of_chain)
00099 {
00100 assert(!part_of_chain || new_head->IsPrimaryVehicle());
00101
00102 for (Vehicle *src = old_veh; src != NULL; src = src->Next()) {
00103 if (!part_of_chain && src->type == VEH_TRAIN && src != old_veh && src != Train::From(old_veh)->other_multiheaded_part && !src->IsArticulatedPart()) {
00104
00105 src = src->GetLastEnginePart();
00106 continue;
00107 }
00108 if (src->cargo_type >= NUM_CARGO || src->cargo.Count() == 0) continue;
00109
00110
00111 for (Vehicle *dest = new_head; dest != NULL && src->cargo.Count() > 0; dest = dest->Next()) {
00112 if (!part_of_chain && dest->type == VEH_TRAIN && dest != new_head && dest != Train::From(new_head)->other_multiheaded_part && !dest->IsArticulatedPart()) {
00113
00114 dest = dest->GetLastEnginePart();
00115 continue;
00116 }
00117 if (dest->cargo_type != src->cargo_type) continue;
00118
00119 uint amount = min(src->cargo.Count(), dest->cargo_cap - dest->cargo.Count());
00120 if (amount <= 0) continue;
00121
00122 src->cargo.MoveTo(&dest->cargo, amount);
00123 }
00124 }
00125
00126
00127 if (part_of_chain && new_head->type == VEH_TRAIN) Train::From(new_head)->ConsistChanged(true);
00128 }
00129
00136 static bool VerifyAutoreplaceRefitForOrders(const Vehicle *v, EngineID engine_type)
00137 {
00138
00139 uint32 union_refit_mask_a = GetUnionOfArticulatedRefitMasks(v->engine_type, false);
00140 uint32 union_refit_mask_b = GetUnionOfArticulatedRefitMasks(engine_type, false);
00141
00142 const Order *o;
00143 const Vehicle *u = (v->type == VEH_TRAIN) ? v->First() : v;
00144 FOR_VEHICLE_ORDERS(u, o) {
00145 if (!o->IsRefit() || o->IsAutoRefit()) continue;
00146 CargoID cargo_type = o->GetRefitCargo();
00147
00148 if (!HasBit(union_refit_mask_a, cargo_type)) continue;
00149 if (!HasBit(union_refit_mask_b, cargo_type)) return false;
00150 }
00151
00152 return true;
00153 }
00154
00164 static CargoID GetNewCargoTypeForReplace(Vehicle *v, EngineID engine_type, bool part_of_chain)
00165 {
00166 uint32 available_cargo_types, union_mask;
00167 GetArticulatedRefitMasks(engine_type, true, &union_mask, &available_cargo_types);
00168
00169 if (union_mask == 0) return CT_NO_REFIT;
00170
00171 CargoID cargo_type;
00172 if (IsArticulatedVehicleCarryingDifferentCargos(v, &cargo_type)) return CT_INVALID;
00173
00174 if (cargo_type == CT_INVALID) {
00175 if (v->type != VEH_TRAIN) return CT_NO_REFIT;
00176
00177 if (!part_of_chain) return CT_NO_REFIT;
00178
00179
00180
00181
00182 for (v = v->First(); v != NULL; v = v->Next()) {
00183 if (v->cargo_cap == 0) continue;
00184
00185 if (HasBit(available_cargo_types, v->cargo_type)) return v->cargo_type;
00186 }
00187
00188 return CT_NO_REFIT;
00189 } else {
00190 if (!HasBit(available_cargo_types, cargo_type)) return CT_INVALID;
00191
00192 if (part_of_chain && !VerifyAutoreplaceRefitForOrders(v, engine_type)) return CT_INVALID;
00193
00194 return cargo_type;
00195 }
00196 }
00197
00205 static CommandCost GetNewEngineType(const Vehicle *v, const Company *c, EngineID &e)
00206 {
00207 assert(v->type != VEH_TRAIN || !v->IsArticulatedPart());
00208
00209 e = INVALID_ENGINE;
00210
00211 if (v->type == VEH_TRAIN && Train::From(v)->IsRearDualheaded()) {
00212
00213 return CommandCost();
00214 }
00215
00216 e = EngineReplacementForCompany(c, v->engine_type, v->group_id);
00217
00218
00219 if (e != INVALID_ENGINE && IsEngineBuildable(e, v->type, _current_company)) {
00220 return CommandCost();
00221 }
00222
00223
00224 if (v->NeedsAutorenewing(c)) e = v->engine_type;
00225
00226
00227 if (e == INVALID_ENGINE || IsEngineBuildable(e, v->type, _current_company)) return CommandCost();
00228
00229
00230 return CommandCost(STR_ERROR_RAIL_VEHICLE_NOT_AVAILABLE + v->type);
00231 }
00232
00241 static CommandCost BuildReplacementVehicle(Vehicle *old_veh, Vehicle **new_vehicle, bool part_of_chain)
00242 {
00243 *new_vehicle = NULL;
00244
00245
00246 const Company *c = Company::Get(_current_company);
00247 EngineID e;
00248 CommandCost cost = GetNewEngineType(old_veh, c, e);
00249 if (cost.Failed()) return cost;
00250 if (e == INVALID_ENGINE) return CommandCost();
00251
00252
00253 CargoID refit_cargo = GetNewCargoTypeForReplace(old_veh, e, part_of_chain);
00254 if (refit_cargo == CT_INVALID) return CommandCost();
00255
00256
00257 cost = DoCommand(old_veh->tile, e, 0, DC_EXEC | DC_AUTOREPLACE, GetCmdBuildVeh(old_veh));
00258 if (cost.Failed()) return cost;
00259
00260 Vehicle *new_veh = Vehicle::Get(_new_vehicle_id);
00261 *new_vehicle = new_veh;
00262
00263
00264 if (refit_cargo != CT_NO_REFIT) {
00265 byte subtype = GetBestFittingSubType(old_veh, new_veh, refit_cargo);
00266
00267 cost.AddCost(DoCommand(0, new_veh->index, refit_cargo | (subtype << 8), DC_EXEC, GetCmdRefitVeh(new_veh)));
00268 assert(cost.Succeeded());
00269 }
00270
00271
00272 if (new_veh->type == VEH_TRAIN && HasBit(Train::From(old_veh)->flags, VRF_REVERSE_DIRECTION)) {
00273 DoCommand(0, new_veh->index, true, DC_EXEC, CMD_REVERSE_TRAIN_DIRECTION);
00274 }
00275
00276 return cost;
00277 }
00278
00285 static inline CommandCost CmdStartStopVehicle(const Vehicle *v, bool evaluate_callback)
00286 {
00287 return DoCommand(0, v->index, evaluate_callback ? 1 : 0, DC_EXEC | DC_AUTOREPLACE, CMD_START_STOP_VEHICLE);
00288 }
00289
00298 static inline CommandCost CmdMoveVehicle(const Vehicle *v, const Vehicle *after, DoCommandFlag flags, bool whole_chain)
00299 {
00300 return DoCommand(0, v->index | (whole_chain ? 1 : 0) << 20, after != NULL ? after->index : INVALID_VEHICLE, flags, CMD_MOVE_RAIL_VEHICLE);
00301 }
00302
00309 static CommandCost CopyHeadSpecificThings(Vehicle *old_head, Vehicle *new_head, DoCommandFlag flags)
00310 {
00311 CommandCost cost = CommandCost();
00312
00313
00314 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));
00315
00316
00317 if (cost.Succeeded() && old_head != new_head) cost.AddCost(DoCommand(0, old_head->group_id, new_head->index, DC_EXEC, CMD_ADD_VEHICLE_GROUP));
00318
00319
00320 if (cost.Succeeded()) {
00321
00322 assert((new_head->vehstatus & VS_STOPPED) != 0);
00323 cost.AddCost(CmdStartStopVehicle(new_head, true));
00324
00325
00326 if (cost.Succeeded()) cost.AddCost(CmdStartStopVehicle(new_head, false));
00327 }
00328
00329
00330 if (cost.Succeeded() && old_head != new_head && (flags & DC_EXEC) != 0) {
00331
00332 if (old_head->name != NULL) {
00333 DoCommand(0, new_head->index, 0, DC_EXEC | DC_AUTOREPLACE, CMD_RENAME_VEHICLE, old_head->name);
00334 }
00335
00336
00337 new_head->CopyVehicleConfigAndStatistics(old_head);
00338
00339
00340 ChangeVehicleViewports(old_head->index, new_head->index);
00341 ChangeVehicleViewWindow(old_head->index, new_head->index);
00342 ChangeVehicleNews(old_head->index, new_head->index);
00343 }
00344
00345 return cost;
00346 }
00347
00355 static CommandCost ReplaceFreeUnit(Vehicle **single_unit, DoCommandFlag flags, bool *nothing_to_do)
00356 {
00357 Train *old_v = Train::From(*single_unit);
00358 assert(!old_v->IsArticulatedPart() && !old_v->IsRearDualheaded());
00359
00360 CommandCost cost = CommandCost(EXPENSES_NEW_VEHICLES, 0);
00361
00362
00363 Vehicle *new_v = NULL;
00364 cost.AddCost(BuildReplacementVehicle(old_v, &new_v, false));
00365
00366
00367 if (cost.Succeeded() && new_v != NULL) {
00368 *nothing_to_do = false;
00369
00370 if ((flags & DC_EXEC) != 0) {
00371
00372 CmdMoveVehicle(new_v, old_v, DC_EXEC, false);
00373
00374
00375
00376
00377
00378
00379
00380 TransferCargo(old_v, new_v, false);
00381
00382 *single_unit = new_v;
00383 }
00384
00385
00386 cost.AddCost(DoCommand(0, old_v->index, 0, flags, GetCmdSellVeh(old_v)));
00387
00388
00389 if ((flags & DC_EXEC) == 0) {
00390 DoCommand(0, new_v->index, 0, DC_EXEC, GetCmdSellVeh(new_v));
00391 }
00392 }
00393
00394 return cost;
00395 }
00396
00405 static CommandCost ReplaceChain(Vehicle **chain, DoCommandFlag flags, bool wagon_removal, bool *nothing_to_do)
00406 {
00407 Vehicle *old_head = *chain;
00408 assert(old_head->IsPrimaryVehicle());
00409
00410 CommandCost cost = CommandCost(EXPENSES_NEW_VEHICLES, 0);
00411
00412 if (old_head->type == VEH_TRAIN) {
00413
00414 uint16 old_total_length = CeilDiv(Train::From(old_head)->gcache.cached_total_length, TILE_SIZE) * TILE_SIZE;
00415
00416 int num_units = 0;
00417 for (Train *w = Train::From(old_head); w != NULL; w = w->GetNextUnit()) num_units++;
00418
00419 Train **old_vehs = CallocT<Train *>(num_units);
00420 Train **new_vehs = CallocT<Train *>(num_units);
00421 Money *new_costs = MallocT<Money>(num_units);
00422
00423
00424
00425 int i;
00426 Train *w;
00427 for (w = Train::From(old_head), i = 0; w != NULL; w = w->GetNextUnit(), i++) {
00428 assert(i < num_units);
00429 old_vehs[i] = w;
00430
00431 CommandCost ret = BuildReplacementVehicle(old_vehs[i], (Vehicle**)&new_vehs[i], true);
00432 cost.AddCost(ret);
00433 if (cost.Failed()) break;
00434
00435 new_costs[i] = ret.GetCost();
00436 if (new_vehs[i] != NULL) *nothing_to_do = false;
00437 }
00438 Train *new_head = (new_vehs[0] != NULL ? new_vehs[0] : old_vehs[0]);
00439
00440
00441 if (cost.Succeeded()) {
00442
00443 Train *second = Train::From(old_head)->GetNextUnit();
00444 if (second != NULL) cost.AddCost(CmdMoveVehicle(second, NULL, DC_EXEC | DC_AUTOREPLACE, true));
00445
00446 assert(Train::From(new_head)->GetNextUnit() == NULL);
00447
00448
00449
00450
00451
00452 Train *last_engine = NULL;
00453 if (cost.Succeeded()) {
00454 for (int i = num_units - 1; i > 0; i--) {
00455 Train *append = (new_vehs[i] != NULL ? new_vehs[i] : old_vehs[i]);
00456
00457 if (RailVehInfo(append->engine_type)->railveh_type == RAILVEH_WAGON) continue;
00458
00459 if (new_vehs[i] != NULL) {
00460
00461
00462
00463 CmdMoveVehicle(old_vehs[i], NULL, DC_EXEC | DC_AUTOREPLACE, false);
00464 }
00465
00466 if (last_engine == NULL) last_engine = append;
00467 cost.AddCost(CmdMoveVehicle(append, new_head, DC_EXEC, false));
00468 if (cost.Failed()) break;
00469 }
00470 if (last_engine == NULL) last_engine = new_head;
00471 }
00472
00473
00474 if (cost.Succeeded() && wagon_removal && new_head->gcache.cached_total_length > old_total_length) cost = CommandCost(STR_ERROR_TRAIN_TOO_LONG_AFTER_REPLACEMENT);
00475
00476
00477
00478
00479 if (cost.Succeeded()) {
00480 for (int i = num_units - 1; i > 0; i--) {
00481 assert(last_engine != NULL);
00482 Vehicle *append = (new_vehs[i] != NULL ? new_vehs[i] : old_vehs[i]);
00483
00484 if (RailVehInfo(append->engine_type)->railveh_type == RAILVEH_WAGON) {
00485
00486 CommandCost res = CmdMoveVehicle(append, last_engine, DC_EXEC, false);
00487
00488
00489
00490
00491 if (wagon_removal && (res.Failed() ? res.GetErrorMessage() == STR_ERROR_TRAIN_TOO_LONG : new_head->gcache.cached_total_length > old_total_length)) {
00492 CmdMoveVehicle(append, NULL, DC_EXEC | DC_AUTOREPLACE, false);
00493 break;
00494 }
00495
00496 cost.AddCost(res);
00497 if (cost.Failed()) break;
00498 } else {
00499
00500 assert(append == last_engine);
00501 last_engine = last_engine->GetPrevUnit();
00502 }
00503 }
00504 }
00505
00506
00507 if (cost.Succeeded() && wagon_removal) {
00508 assert(new_head->gcache.cached_total_length <= _settings_game.vehicle.max_train_length * TILE_SIZE);
00509 for (int i = 1; i < num_units; i++) {
00510 Vehicle *wagon = new_vehs[i];
00511 if (wagon == NULL) continue;
00512 if (wagon->First() == new_head) break;
00513
00514 assert(RailVehInfo(wagon->engine_type)->railveh_type == RAILVEH_WAGON);
00515
00516
00517 CommandCost ret = DoCommand(0, wagon->index, 0, DC_EXEC, GetCmdSellVeh(wagon));
00518 assert(ret.Succeeded());
00519 new_vehs[i] = NULL;
00520
00521
00522
00523 cost.AddCost(-new_costs[i]);
00524 }
00525 }
00526
00527
00528 if (cost.Succeeded()) cost.AddCost(CopyHeadSpecificThings(old_head, new_head, flags));
00529
00530 if (cost.Succeeded()) {
00531
00532 if ((flags & DC_EXEC) != 0 && new_head != old_head) {
00533 *chain = new_head;
00534 }
00535
00536
00537 for (int i = 0; i < num_units; i++) {
00538 Vehicle *w = old_vehs[i];
00539
00540
00541 if (w->First() == new_head) continue;
00542
00543 if ((flags & DC_EXEC) != 0) TransferCargo(w, new_head, true);
00544
00545
00546
00547
00548 cost.AddCost(DoCommand(0, w->index, 0, flags | DC_AUTOREPLACE, GetCmdSellVeh(w)));
00549 if ((flags & DC_EXEC) != 0) {
00550 old_vehs[i] = NULL;
00551 if (i == 0) old_head = NULL;
00552 }
00553 }
00554 }
00555
00556
00557
00558
00559 if ((flags & DC_EXEC) == 0) {
00560
00561 Train *second = Train::From(old_head)->GetNextUnit();
00562 if (second != NULL) CmdMoveVehicle(second, NULL, DC_EXEC | DC_AUTOREPLACE, true);
00563
00564 assert(Train::From(old_head)->GetNextUnit() == NULL);
00565
00566 for (int i = num_units - 1; i > 0; i--) {
00567 CommandCost ret = CmdMoveVehicle(old_vehs[i], old_head, DC_EXEC | DC_AUTOREPLACE, false);
00568 assert(ret.Succeeded());
00569 }
00570 }
00571 }
00572
00573
00574 if ((flags & DC_EXEC) == 0) {
00575 for (int i = num_units - 1; i >= 0; i--) {
00576 if (new_vehs[i] != NULL) {
00577 DoCommand(0, new_vehs[i]->index, 0, DC_EXEC, GetCmdSellVeh(new_vehs[i]));
00578 new_vehs[i] = NULL;
00579 }
00580 }
00581 }
00582
00583 free(old_vehs);
00584 free(new_vehs);
00585 free(new_costs);
00586 } else {
00587
00588 Vehicle *new_head = NULL;
00589 cost.AddCost(BuildReplacementVehicle(old_head, &new_head, true));
00590
00591
00592 if (cost.Succeeded() && new_head != NULL) {
00593 *nothing_to_do = false;
00594
00595
00596 cost.AddCost(CopyHeadSpecificThings(old_head, new_head, flags));
00597
00598 if (cost.Succeeded()) {
00599
00600 if ((flags & DC_EXEC) != 0) {
00601 TransferCargo(old_head, new_head, true);
00602 *chain = new_head;
00603 }
00604
00605
00606 cost.AddCost(DoCommand(0, old_head->index, 0, flags, GetCmdSellVeh(old_head)));
00607 }
00608
00609
00610 if ((flags & DC_EXEC) == 0) {
00611 DoCommand(0, new_head->index, 0, DC_EXEC, GetCmdSellVeh(new_head));
00612 }
00613 }
00614 }
00615
00616 return cost;
00617 }
00618
00629 CommandCost CmdAutoreplaceVehicle(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00630 {
00631 Vehicle *v = Vehicle::GetIfValid(p1);
00632 if (v == NULL) return CMD_ERROR;
00633
00634 CommandCost ret = CheckOwnership(v->owner);
00635 if (ret.Failed()) return ret;
00636
00637 if (!v->IsInDepot()) return CMD_ERROR;
00638 if (v->vehstatus & VS_CRASHED) return CMD_ERROR;
00639
00640 bool free_wagon = false;
00641 if (v->type == VEH_TRAIN) {
00642 Train *t = Train::From(v);
00643 if (t->IsArticulatedPart() || t->IsRearDualheaded()) return CMD_ERROR;
00644 free_wagon = !t->IsFrontEngine();
00645 if (free_wagon && t->First()->IsFrontEngine()) return CMD_ERROR;
00646 } else {
00647 if (!v->IsPrimaryVehicle()) return CMD_ERROR;
00648 }
00649
00650 const Company *c = Company::Get(_current_company);
00651 bool wagon_removal = c->settings.renew_keep_length;
00652
00653
00654 Vehicle *w = v;
00655 bool any_replacements = false;
00656 while (w != NULL) {
00657 EngineID e;
00658 CommandCost cost = GetNewEngineType(w, c, e);
00659 if (cost.Failed()) return cost;
00660 any_replacements |= (e != INVALID_ENGINE);
00661 w = (!free_wagon && w->type == VEH_TRAIN ? Train::From(w)->GetNextUnit() : NULL);
00662 }
00663
00664 CommandCost cost = CommandCost(EXPENSES_NEW_VEHICLES, 0);
00665 bool nothing_to_do = true;
00666
00667 if (any_replacements) {
00668 bool was_stopped = free_wagon || ((v->vehstatus & VS_STOPPED) != 0);
00669
00670
00671 if (!was_stopped) cost.AddCost(CmdStartStopVehicle(v, true));
00672 if (cost.Failed()) return cost;
00673
00674 assert(v->IsStoppedInDepot());
00675
00676
00677
00678
00679 SavedRandomSeeds saved_seeds;
00680 SaveRandomSeeds(&saved_seeds);
00681 if (free_wagon) {
00682 cost.AddCost(ReplaceFreeUnit(&v, flags & ~DC_EXEC, ¬hing_to_do));
00683 } else {
00684 cost.AddCost(ReplaceChain(&v, flags & ~DC_EXEC, wagon_removal, ¬hing_to_do));
00685 }
00686 RestoreRandomSeeds(saved_seeds);
00687
00688 if (cost.Succeeded() && (flags & DC_EXEC) != 0) {
00689 CommandCost ret;
00690 if (free_wagon) {
00691 ret = ReplaceFreeUnit(&v, flags, ¬hing_to_do);
00692 } else {
00693 ret = ReplaceChain(&v, flags, wagon_removal, ¬hing_to_do);
00694 }
00695 assert(ret.Succeeded() && ret.GetCost() == cost.GetCost());
00696 }
00697
00698
00699 if (!was_stopped) cost.AddCost(CmdStartStopVehicle(v, false));
00700 }
00701
00702 if (cost.Succeeded() && nothing_to_do) cost = CommandCost(STR_ERROR_AUTOREPLACE_NOTHING_TO_DO);
00703 return cost;
00704 }
00705
00718 CommandCost CmdSetAutoReplace(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00719 {
00720 Company *c = Company::GetIfValid(_current_company);
00721 if (c == NULL) return CMD_ERROR;
00722
00723 EngineID old_engine_type = GB(p2, 0, 16);
00724 EngineID new_engine_type = GB(p2, 16, 16);
00725 GroupID id_g = GB(p1, 16, 16);
00726 CommandCost cost;
00727
00728 if (Group::IsValidID(id_g) ? Group::Get(id_g)->owner != _current_company : !IsAllGroupID(id_g) && !IsDefaultGroupID(id_g)) return CMD_ERROR;
00729 if (!Engine::IsValidID(old_engine_type)) return CMD_ERROR;
00730
00731 if (new_engine_type != INVALID_ENGINE) {
00732 if (!Engine::IsValidID(new_engine_type)) return CMD_ERROR;
00733 if (!CheckAutoreplaceValidity(old_engine_type, new_engine_type, _current_company)) return CMD_ERROR;
00734
00735 cost = AddEngineReplacementForCompany(c, old_engine_type, new_engine_type, id_g, flags);
00736 } else {
00737 cost = RemoveEngineReplacementForCompany(c, old_engine_type, id_g, flags);
00738 }
00739
00740 if (flags & DC_EXEC) GroupStatistics::UpdateAutoreplace(_current_company);
00741 if ((flags & DC_EXEC) && IsLocalCompany()) InvalidateAutoreplaceWindow(old_engine_type, id_g);
00742
00743 return cost;
00744 }
00745