# engine.cpp

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    00001 /* $Id: engine.cpp 17079 2009-08-05 23:49:30Z rubidium $ */
    00002
    00005 #include "stdafx.h"
    00006 #include "debug.h"
    00007 #include "company_func.h"
    00008 #include "command_func.h"
    00009 #include "news_func.h"
    00010 #include "variables.h"
    00011 #include "aircraft.h"
    00012 #include "newgrf_engine.h"
    00013 #include "group.h"
    00014 #include "strings_func.h"
    00015 #include "gfx_func.h"
    00016 #include "core/random_func.hpp"
    00017 #include "window_func.h"
    00018 #include "date_func.h"
    00019 #include "autoreplace_gui.h"
    00020 #include "string_func.h"
    00021 #include "oldpool_func.h"
    00022 #include "ai/ai.hpp"
    00023 #include "vehicle_func.h"
    00024 #include "settings_type.h"
    00025
    00026 #include "table/strings.h"
    00027 #include "table/engines.h"
    00028
    00029 DEFINE_OLD_POOL_GENERIC(Engine, Engine)
    00030
    00031 EngineOverrideManager _engine_mngr;
    00032
    00035 Year _year_engine_aging_stops;
    00036
    00038 const uint8 _engine_counts[4] = {
    00039   lengthof(_orig_rail_vehicle_info),
    00040   lengthof(_orig_road_vehicle_info),
    00041   lengthof(_orig_ship_vehicle_info),
    00042   lengthof(_orig_aircraft_vehicle_info),
    00043 };
    00044
    00046 const uint8 _engine_offsets[4] = {
    00047   0,
    00048   lengthof(_orig_rail_vehicle_info),
    00049   lengthof(_orig_rail_vehicle_info) + lengthof(_orig_road_vehicle_info),
    00050   lengthof(_orig_rail_vehicle_info) + lengthof(_orig_road_vehicle_info) + lengthof(_orig_ship_vehicle_info),
    00051 };
    00052
    00053 const uint EngineOverrideManager::NUM_DEFAULT_ENGINES = _engine_counts[VEH_TRAIN] + _engine_counts[VEH_ROAD] + _engine_counts[VEH_SHIP] + _engine_counts[VEH_AIRCRAFT];
    00054
    00055 Engine::Engine() :
    00056   name(NULL),
    00057   overrides_count(0),
    00058   overrides(NULL)
    00059 {
    00060 }
    00061
    00062 Engine::Engine(VehicleType type, EngineID base)
    00063 {
    00064   this->type = type;
    00065   this->internal_id = base;
    00066   this->list_position = base;
    00067
    00068   /* Check if this base engine is within the original engine data range */
    00069   if (base >= _engine_counts[type]) {
    00070     /* Mark engine as valid anyway */
    00071     this->info.climates = 0x80;
    00072     /* Set model life to maximum to make wagons available */
    00073     this->info.base_life = 0xFF;
    00074     return;
    00075   }
    00076
    00077   /* Copy the original engine info for this slot */
    00078   this->info = _orig_engine_info[_engine_offsets[type] + base];
    00079
    00080   /* Copy the original engine data for this slot */
    00081   switch (type) {
    00082     default: NOT_REACHED();
    00083
    00084     case VEH_TRAIN:
    00085       this->u.rail = _orig_rail_vehicle_info[base];
    00086       this->image_index = this->u.rail.image_index;
    00087       this->info.string_id = STR_8000_KIRBY_PAUL_TANK_STEAM + base;
    00088
    00089       /* Set the default model life of original wagons to "infinite" */
    00090       if (this->u.rail.railveh_type == RAILVEH_WAGON) this->info.base_life = 0xFF;
    00091
    00092       break;
    00093
    00094     case VEH_ROAD:
    00095       this->u.road = _orig_road_vehicle_info[base];
    00096       this->image_index = this->u.road.image_index;
    00097       this->info.string_id = STR_8074_MPS_REGAL_BUS + base;
    00098       break;
    00099
    00100     case VEH_SHIP:
    00101       this->u.ship = _orig_ship_vehicle_info[base];
    00102       this->image_index = this->u.ship.image_index;
    00103       this->info.string_id = STR_80CC_MPS_OIL_TANKER + base;
    00104       break;
    00105
    00106     case VEH_AIRCRAFT:
    00107       this->u.air = _orig_aircraft_vehicle_info[base];
    00108       this->image_index = this->u.air.image_index;
    00109       this->info.string_id = STR_80D7_SAMPSON_U52 + base;
    00110       break;
    00111   }
    00112 }
    00113
    00114 Engine::~Engine()
    00115 {
    00116   UnloadWagonOverrides(this);
    00117   free(this->name);
    00118 }
    00119
    00131 CargoID Engine::GetDefaultCargoType() const
    00132 {
    00133   switch (this->type) {
    00134     case VEH_TRAIN:
    00135       return this->u.rail.cargo_type;
    00136
    00137     case VEH_ROAD:
    00138       return this->u.road.cargo_type;
    00139
    00140     case VEH_SHIP:
    00141       return this->u.ship.cargo_type;
    00142
    00143     case VEH_AIRCRAFT:
    00144       return FindFirstRefittableCargo(this->index);
    00145
    00146     default: NOT_REACHED();
    00147   }
    00148 }
    00149
    00155 bool Engine::CanCarryCargo() const
    00156 {
    00157   /* For engines that can appear in a consist (i.e. rail vehicles and (articulated) road vehicles), a capacity
    00158    * of zero is a special case, to define the vehicle to not carry anything. The default cargotype is still used
    00159    * for livery selection etc.
    00160    * Note: Only the property is tested. A capacity callback returning 0 does not have the same effect.
    00161    */
    00162   switch (this->type) {
    00163     case VEH_TRAIN:
    00164       if (this->u.rail.capacity == 0) return false;
    00165       break;
    00166
    00167     case VEH_ROAD:
    00168       if (this->u.road.capacity == 0) return false;
    00169       break;
    00170
    00171     case VEH_SHIP:
    00172     case VEH_AIRCRAFT:
    00173       break;
    00174
    00175     default: NOT_REACHED();
    00176   }
    00177   return this->GetDefaultCargoType() != CT_INVALID;
    00178 }
    00179
    00190 uint Engine::GetDisplayDefaultCapacity() const
    00191 {
    00192   if (!this->CanCarryCargo()) return 0;
    00193   switch (type) {
    00194     case VEH_TRAIN:
    00195       return GetEngineProperty(this->index, 0x14, this->u.rail.capacity) + (this->u.rail.railveh_type == RAILVEH_MULTIHEAD ? this->u.rail.capacity : 0);
    00196
    00197     case VEH_ROAD:
    00198       return GetEngineProperty(this->index, 0x0F, this->u.road.capacity);
    00199
    00200     case VEH_SHIP:
    00201       return GetEngineProperty(this->index, 0x0D, this->u.ship.capacity);
    00202
    00203     case VEH_AIRCRAFT:
    00204       return AircraftDefaultCargoCapacity(this->GetDefaultCargoType(), &this->u.air);
    00205
    00206     default: NOT_REACHED();
    00207   }
    00208 }
    00209
    00210 Money Engine::GetRunningCost() const
    00211 {
    00212   switch (this->type) {
    00213     case VEH_ROAD:
    00214       return this->u.road.running_cost * GetPriceByIndex(this->u.road.running_cost_class) >> 8;
    00215
    00216     case VEH_TRAIN:
    00217       return GetEngineProperty(this->index, 0x0D, this->u.rail.running_cost) * GetPriceByIndex(this->u.rail.running_cost_class) >> 8;
    00218
    00219     case VEH_SHIP:
    00220       return GetEngineProperty(this->index, 0x0F, this->u.ship.running_cost) * _price.ship_running >> 8;
    00221
    00222     case VEH_AIRCRAFT:
    00223       return GetEngineProperty(this->index, 0x0E, this->u.air.running_cost) * _price.aircraft_running >> 8;
    00224
    00225     default: NOT_REACHED();
    00226   }
    00227 }
    00228
    00229 Money Engine::GetCost() const
    00230 {
    00231   switch (this->type) {
    00232     case VEH_ROAD:
    00233       return GetEngineProperty(this->index, 0x11, this->u.road.cost_factor) * (_price.roadveh_base >> 3) >> 5;
    00234
    00235     case VEH_TRAIN:
    00236       if (this->u.rail.railveh_type == RAILVEH_WAGON) {
    00237         return (GetEngineProperty(this->index, 0x17, this->u.rail.cost_factor) * _price.build_railwagon) >> 8;
    00238       } else {
    00239         return GetEngineProperty(this->index, 0x17, this->u.rail.cost_factor) * (_price.build_railvehicle >> 3) >> 5;
    00240       }
    00241     case VEH_SHIP:
    00242       return GetEngineProperty(this->index, 0x0A, this->u.ship.cost_factor) * (_price.ship_base >> 3) >> 5;
    00243
    00244     case VEH_AIRCRAFT:
    00245       return GetEngineProperty(this->index, 0x0B, this->u.air.cost_factor) * (_price.aircraft_base >> 3) >> 5;
    00246
    00247     default: NOT_REACHED();
    00248   }
    00249 }
    00250
    00255 uint Engine::GetDisplayMaxSpeed() const
    00256 {
    00257   switch (this->type) {
    00258     case VEH_TRAIN:
    00259       return GetEngineProperty(this->index, 0x09, this->u.rail.max_speed);
    00260
    00261     case VEH_ROAD:
    00262       return this->u.road.max_speed / 2;
    00263
    00264     case VEH_SHIP:
    00265       return GetEngineProperty(this->index, 0x0B, this->u.ship.max_speed) / 2;
    00266
    00267     case VEH_AIRCRAFT:
    00268       return this->u.air.max_speed;
    00269
    00270     default: NOT_REACHED();
    00271   }
    00272 }
    00273
    00274 uint Engine::GetPower() const
    00275 {
    00276   /* Currently only trains have 'power' */
    00277   switch (this->type) {
    00278     case VEH_TRAIN:
    00279       return GetEngineProperty(this->index, 0x0B, this->u.rail.power);
    00280
    00281     default: NOT_REACHED();
    00282   }
    00283 }
    00284
    00290 uint Engine::GetDisplayWeight() const
    00291 {
    00292   /* Currently only trains have 'weight' */
    00293   switch (this->type) {
    00294     case VEH_TRAIN:
    00295       return GetEngineProperty(this->index, 0x16, this->u.rail.weight) << (this->u.rail.railveh_type == RAILVEH_MULTIHEAD ? 1 : 0);
    00296
    00297     default: NOT_REACHED();
    00298   }
    00299 }
    00300
    00306 uint Engine::GetDisplayMaxTractiveEffort() const
    00307 {
    00308   /* Currently only trains have 'tractive effort' */
    00309   switch (this->type) {
    00310     case VEH_TRAIN:
    00311       return (10 * this->GetDisplayWeight() * GetEngineProperty(this->index, 0x1F, this->u.rail.tractive_effort)) / 256;
    00312
    00313     default: NOT_REACHED();
    00314   }
    00315 }
    00316
    00320 void EngineOverrideManager::ResetToDefaultMapping()
    00321 {
    00322   this->Clear();
    00323   for (VehicleType type = VEH_TRAIN; type <= VEH_AIRCRAFT; type++) {
    00324     for (uint internal_id = 0; internal_id < _engine_counts[type]; internal_id++) {
    00325       EngineIDMapping *eid = this->Append();
    00326       eid->type            = type;
    00327       eid->grfid           = INVALID_GRFID;
    00328       eid->internal_id     = internal_id;
    00329       eid->substitute_id   = internal_id;
    00330     }
    00331   }
    00332 }
    00333
    00343 EngineID EngineOverrideManager::GetID(VehicleType type, uint16 grf_local_id, uint32 grfid)
    00344 {
    00345   const EngineIDMapping *end = this->End();
    00346   EngineID index = 0;
    00347   for (const EngineIDMapping *eid = this->Begin(); eid != end; eid++, index++) {
    00348     if (eid->type == type && eid->grfid == grfid && eid->internal_id == grf_local_id) {
    00349       return index;
    00350     }
    00351   }
    00352   return INVALID_ENGINE;
    00353 }
    00354
    00357 void SetCachedEngineCounts()
    00358 {
    00359   uint engines = GetEnginePoolSize();
    00360
    00361   /* Set up the engine count for all companies */
    00362   Company *c;
    00363   FOR_ALL_COMPANIES(c) {
    00364     free(c->num_engines);
    00365     c->num_engines = CallocT<EngineID>(engines);
    00366   }
    00367
    00368   /* Recalculate */
    00369   Group *g;
    00370   FOR_ALL_GROUPS(g) {
    00371     free(g->num_engines);
    00372     g->num_engines = CallocT<EngineID>(engines);
    00373   }
    00374
    00375   const Vehicle *v;
    00376   FOR_ALL_VEHICLES(v) {
    00377     if (!IsEngineCountable(v)) continue;
    00378
    00379     assert(v->engine_type < engines);
    00380
    00381     GetCompany(v->owner)->num_engines[v->engine_type]++;
    00382
    00383     if (v->group_id == DEFAULT_GROUP) continue;
    00384
    00385     g = GetGroup(v->group_id);
    00386     assert(v->type == g->vehicle_type);
    00387     assert(v->owner == g->owner);
    00388
    00389     g->num_engines[v->engine_type]++;
    00390   }
    00391 }
    00392
    00393 void SetupEngines()
    00394 {
    00395   _Engine_pool.CleanPool();
    00396   _Engine_pool.AddBlockToPool();
    00397
    00398   assert(_engine_mngr.Length() >= _engine_mngr.NUM_DEFAULT_ENGINES);
    00399   const EngineIDMapping *end = _engine_mngr.End();
    00400   uint index = 0;
    00401   for (const EngineIDMapping *eid = _engine_mngr.Begin(); eid != end; eid++, index++) {
    00402     const Engine *e = new Engine(eid->type, eid->internal_id);
    00403     assert(e->index == index);
    00404   }
    00405 }
    00406
    00407
    00408 void ShowEnginePreviewWindow(EngineID engine);
    00409
    00410 /* Determine if an engine type is a wagon (and not a loco) */
    00411 static bool IsWagon(EngineID index)
    00412 {
    00413   const Engine *e = GetEngine(index);
    00414   return e->type == VEH_TRAIN && e->u.rail.railveh_type == RAILVEH_WAGON;
    00415 }
    00416
    00417 static void CalcEngineReliability(Engine *e)
    00418 {
    00419   uint age = e->age;
    00420
    00421   /* Check for early retirement */
    00422   if (e->company_avail != 0 && !_settings_game.vehicle.never_expire_vehicles && e->info.base_life != 0xFF) {
    00423     int retire_early = e->info.retire_early;
    00424     uint retire_early_max_age = max(0, e->duration_phase_1 + e->duration_phase_2 - retire_early * 12);
    00425     if (retire_early != 0 && age >= retire_early_max_age) {
    00426       /* Early retirement is enabled and we're past the date... */
    00427       e->company_avail = 0;
    00428       AddRemoveEngineFromAutoreplaceAndBuildWindows(e->type);
    00429     }
    00430   }
    00431
    00432   if (age < e->duration_phase_1) {
    00433     uint start = e->reliability_start;
    00434     e->reliability = age * (e->reliability_max - start) / e->duration_phase_1 + start;
    00435   } else if ((age -= e->duration_phase_1) < e->duration_phase_2 || _settings_game.vehicle.never_expire_vehicles || e->info.base_life == 0xFF) {
    00436     /* We are at the peak of this engines life. It will have max reliability.
    00437      * This is also true if the engines never expire. They will not go bad over time */
    00438     e->reliability = e->reliability_max;
    00439   } else if ((age -= e->duration_phase_2) < e->duration_phase_3) {
    00440     uint max = e->reliability_max;
    00441     e->reliability = (int)age * (int)(e->reliability_final - max) / e->duration_phase_3 + max;
    00442   } else {
    00443     /* time's up for this engine.
    00444      * We will now completely retire this design */
    00445     e->company_avail = 0;
    00446     e->reliability = e->reliability_final;
    00447     /* Kick this engine out of the lists */
    00448     AddRemoveEngineFromAutoreplaceAndBuildWindows(e->type);
    00449   }
    00450   InvalidateWindowClasses(WC_BUILD_VEHICLE); // Update to show the new reliability
    00451   InvalidateWindowClasses(WC_REPLACE_VEHICLE);
    00452 }
    00453
    00454 void SetYearEngineAgingStops()
    00455 {
    00456   /* Determine last engine aging year, default to 2050 as previously. */
    00457   _year_engine_aging_stops = 2050;
    00458
    00459   const Engine *e;
    00460   FOR_ALL_ENGINES(e) {
    00461     const EngineInfo *ei = &e->info;
    00462
    00463     /* Exclude certain engines */
    00464     if (!HasBit(ei->climates, _settings_game.game_creation.landscape)) continue;
    00465     if (e->type == VEH_TRAIN && e->u.rail.railveh_type == RAILVEH_WAGON) continue;
    00466
    00467     /* Base year ending date on half the model life */
    00468     YearMonthDay ymd;
    00469     ConvertDateToYMD(ei->base_intro + (ei->lifelength * DAYS_IN_LEAP_YEAR) / 2, &ymd);
    00470
    00471     _year_engine_aging_stops = max(_year_engine_aging_stops, ymd.year);
    00472   }
    00473 }
    00474
    00475 void StartupOneEngine(Engine *e, Date aging_date)
    00476 {
    00477   const EngineInfo *ei = &e->info;
    00478   uint32 r;
    00479
    00480   e->age = 0;
    00481   e->flags = 0;
    00482   e->company_avail = 0;
    00483
    00484   /* Don't randomise the start-date in the first two years after gamestart to ensure availability
    00485    * of engines in early starting games.
    00486    * Note: TTDP uses fixed 1922 */
    00487   r = Random();
    00488   e->intro_date = ei->base_intro <= ConvertYMDToDate(_settings_game.game_creation.starting_year + 2, 0, 1) ? ei->base_intro : (Date)GB(r, 0, 9) + ei->base_intro;
    00489   if (e->intro_date <= _date) {
    00490     e->age = (aging_date - e->intro_date) >> 5;
    00491     e->company_avail = (CompanyMask)-1;
    00492     e->flags |= ENGINE_AVAILABLE;
    00493   }
    00494
    00495   e->reliability_start = GB(r, 16, 14) + 0x7AE0;
    00496   r = Random();
    00497   e->reliability_max   = GB(r,  0, 14) + 0xBFFF;
    00498   e->reliability_final = GB(r, 16, 14) + 0x3FFF;
    00499
    00500   r = Random();
    00501   e->duration_phase_1 = GB(r, 0, 5) + 7;
    00502   e->duration_phase_2 = GB(r, 5, 4) + ei->base_life * 12 - 96;
    00503   e->duration_phase_3 = GB(r, 9, 7) + 120;
    00504
    00505   e->reliability_spd_dec = ei->decay_speed << 2;
    00506
    00507   CalcEngineReliability(e);
    00508
    00509   e->lifelength = ei->lifelength + _settings_game.vehicle.extend_vehicle_life;
    00510
    00511   /* prevent certain engines from ever appearing. */
    00512   if (!HasBit(ei->climates, _settings_game.game_creation.landscape)) {
    00513     e->flags |= ENGINE_AVAILABLE;
    00514     e->company_avail = 0;
    00515   }
    00516 }
    00517
    00518 void StartupEngines()
    00519 {
    00520   Engine *e;
    00521   /* Aging of vehicles stops, so account for that when starting late */
    00522   const Date aging_date = min(_date, ConvertYMDToDate(_year_engine_aging_stops, 0, 1));
    00523
    00524   FOR_ALL_ENGINES(e) {
    00525     StartupOneEngine(e, aging_date);
    00526   }
    00527
    00528   /* Update the bitmasks for the vehicle lists */
    00529   Company *c;
    00530   FOR_ALL_COMPANIES(c) {
    00531     c->avail_railtypes = GetCompanyRailtypes(c->index);
    00532     c->avail_roadtypes = GetCompanyRoadtypes(c->index);
    00533   }
    00534 }
    00535
    00536 static void AcceptEnginePreview(EngineID eid, CompanyID company)
    00537 {
    00538   Engine *e = GetEngine(eid);
    00539   Company *c = GetCompany(company);
    00540
    00541   SetBit(e->company_avail, company);
    00542   if (e->type == VEH_TRAIN) {
    00543     const RailVehicleInfo *rvi = RailVehInfo(eid);
    00544
    00545     assert(rvi->railtype < RAILTYPE_END);
    00546     SetBit(c->avail_railtypes, rvi->railtype);
    00547   } else if (e->type == VEH_ROAD) {
    00548     SetBit(c->avail_roadtypes, HasBit(EngInfo(eid)->misc_flags, EF_ROAD_TRAM) ? ROADTYPE_TRAM : ROADTYPE_ROAD);
    00549   }
    00550
    00551   e->preview_company_rank = 0xFF;
    00552   if (company == _local_company) {
    00553     AddRemoveEngineFromAutoreplaceAndBuildWindows(e->type);
    00554   }
    00555 }
    00556
    00557 static CompanyID GetBestCompany(uint8 pp)
    00558 {
    00559   const Company *c;
    00560   int32 best_hist;
    00561   CompanyID best_company;
    00562   CompanyMask mask = 0;
    00563
    00564   do {
    00565     best_hist = -1;
    00566     best_company = INVALID_COMPANY;
    00567     FOR_ALL_COMPANIES(c) {
    00568       if (c->block_preview == 0 && !HasBit(mask, c->index) &&
    00569           c->old_economy[0].performance_history > best_hist) {
    00570         best_hist = c->old_economy[0].performance_history;
    00571         best_company = c->index;
    00572       }
    00573     }
    00574
    00575     if (best_company == INVALID_COMPANY) return INVALID_COMPANY;
    00576
    00577     SetBit(mask, best_company);
    00578   } while (--pp != 0);
    00579
    00580   return best_company;
    00581 }
    00582
    00583 void EnginesDailyLoop()
    00584 {
    00585   if (_cur_year >= _year_engine_aging_stops) return;
    00586
    00587   Engine *e;
    00588   FOR_ALL_ENGINES(e) {
    00589     EngineID i = e->index;
    00590     if (e->flags & ENGINE_EXCLUSIVE_PREVIEW) {
    00591       if (e->flags & ENGINE_OFFER_WINDOW_OPEN) {
    00592         if (e->preview_company_rank != 0xFF && !--e->preview_wait) {
    00593           e->flags &= ~ENGINE_OFFER_WINDOW_OPEN;
    00594           DeleteWindowById(WC_ENGINE_PREVIEW, i);
    00595           e->preview_company_rank++;
    00596         }
    00597       } else if (e->preview_company_rank != 0xFF) {
    00598         CompanyID best_company = GetBestCompany(e->preview_company_rank);
    00599
    00600         if (best_company == INVALID_COMPANY) {
    00601           e->preview_company_rank = 0xFF;
    00602           continue;
    00603         }
    00604
    00605         e->flags |= ENGINE_OFFER_WINDOW_OPEN;
    00606         e->preview_wait = 20;
    00607         AI::NewEvent(best_company, new AIEventEnginePreview(i));
    00608         if (IsInteractiveCompany(best_company)) ShowEnginePreviewWindow(i);
    00609       }
    00610     }
    00611   }
    00612 }
    00613
    00621 CommandCost CmdWantEnginePreview(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    00622 {
    00623   Engine *e;
    00624
    00625   if (!IsEngineIndex(p1)) return CMD_ERROR;
    00626   e = GetEngine(p1);
    00627   if (GetBestCompany(e->preview_company_rank) != _current_company) return CMD_ERROR;
    00628
    00629   if (flags & DC_EXEC) AcceptEnginePreview(p1, _current_company);
    00630
    00631   return CommandCost();
    00632 }
    00633
    00634 StringID GetEngineCategoryName(EngineID engine);
    00635
    00636 static void NewVehicleAvailable(Engine *e)
    00637 {
    00638   Vehicle *v;
    00639   Company *c;
    00640   EngineID index = e->index;
    00641
    00642   /* In case the company didn't build the vehicle during the intro period,
    00643    * prevent that company from getting future intro periods for a while. */
    00644   if (e->flags & ENGINE_EXCLUSIVE_PREVIEW) {
    00645     FOR_ALL_COMPANIES(c) {
    00646       uint block_preview = c->block_preview;
    00647
    00648       if (!HasBit(e->company_avail, c->index)) continue;
    00649
    00650       /* We assume the user did NOT build it.. prove me wrong ;) */
    00651       c->block_preview = 20;
    00652
    00653       FOR_ALL_VEHICLES(v) {
    00654         if (v->type == VEH_TRAIN || v->type == VEH_ROAD || v->type == VEH_SHIP ||
    00655             (v->type == VEH_AIRCRAFT && IsNormalAircraft(v))) {
    00656           if (v->owner == c->index && v->engine_type == index) {
    00657             /* The user did prove me wrong, so restore old value */
    00658             c->block_preview = block_preview;
    00659             break;
    00660           }
    00661         }
    00662       }
    00663     }
    00664   }
    00665
    00666   e->flags = (e->flags & ~ENGINE_EXCLUSIVE_PREVIEW) | ENGINE_AVAILABLE;
    00667   AddRemoveEngineFromAutoreplaceAndBuildWindows(e->type);
    00668
    00669   /* Now available for all companies */
    00670   e->company_avail = (CompanyMask)-1;
    00671
    00672   /* Do not introduce new rail wagons */
    00673   if (IsWagon(index)) return;
    00674
    00675   if (e->type == VEH_TRAIN) {
    00676     /* maybe make another rail type available */
    00677     RailType railtype = e->u.rail.railtype;
    00678     assert(railtype < RAILTYPE_END);
    00679     FOR_ALL_COMPANIES(c) SetBit(c->avail_railtypes, railtype);
    00680   } else if (e->type == VEH_ROAD) {
    00681     /* maybe make another road type available */
    00682     FOR_ALL_COMPANIES(c) SetBit(c->avail_roadtypes, HasBit(e->info.misc_flags, EF_ROAD_TRAM) ? ROADTYPE_TRAM : ROADTYPE_ROAD);
    00683   }
    00684
    00685   AI::BroadcastNewEvent(new AIEventEngineAvailable(index));
    00686
    00687   SetDParam(0, GetEngineCategoryName(index));
    00688   SetDParam(1, index);
    00689   AddNewsItem(STR_NEW_VEHICLE_NOW_AVAILABLE_WITH_TYPE, NS_NEW_VEHICLES, index, 0);
    00690 }
    00691
    00692 void EnginesMonthlyLoop()
    00693 {
    00694   if (_cur_year < _year_engine_aging_stops) {
    00695     Engine *e;
    00696     FOR_ALL_ENGINES(e) {
    00697       /* Age the vehicle */
    00698       if (e->flags & ENGINE_AVAILABLE && e->age != 0xFFFF) {
    00699         e->age++;
    00700         CalcEngineReliability(e);
    00701       }
    00702
    00703       if (!(e->flags & ENGINE_AVAILABLE) && _date >= (e->intro_date + DAYS_IN_YEAR)) {
    00704         /* Introduce it to all companies */
    00705         NewVehicleAvailable(e);
    00706       } else if (!(e->flags & (ENGINE_AVAILABLE | ENGINE_EXCLUSIVE_PREVIEW)) && _date >= e->intro_date) {
    00707         /* Introduction date has passed.. show introducing dialog to one companies. */
    00708         e->flags |= ENGINE_EXCLUSIVE_PREVIEW;
    00709
    00710         /* Do not introduce new rail wagons */
    00711         if (!IsWagon(e->index))
    00712           e->preview_company_rank = 1; // Give to the company with the highest rating.
    00713       }
    00714     }
    00715   }
    00716 }
    00717
    00718 static bool IsUniqueEngineName(const char *name)
    00719 {
    00720   const Engine *e;
    00721
    00722   FOR_ALL_ENGINES(e) {
    00723     if (e->name != NULL && strcmp(e->name, name) == 0) return false;
    00724   }
    00725
    00726   return true;
    00727 }
    00728
    00735 CommandCost CmdRenameEngine(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    00736 {
    00737   if (!IsEngineIndex(p1)) return CMD_ERROR;
    00738
    00739   bool reset = StrEmpty(text);
    00740
    00741   if (!reset) {
    00742     if (strlen(text) >= MAX_LENGTH_ENGINE_NAME_BYTES) return CMD_ERROR;
    00743     if (!IsUniqueEngineName(text)) return_cmd_error(STR_NAME_MUST_BE_UNIQUE);
    00744   }
    00745
    00746   if (flags & DC_EXEC) {
    00747     Engine *e = GetEngine(p1);
    00748     free(e->name);
    00749
    00750     if (reset) {
    00751       e->name = NULL;
    00752     } else {
    00753       e->name = strdup(text);
    00754     }
    00755
    00756     MarkWholeScreenDirty();
    00757   }
    00758
    00759   return CommandCost();
    00760 }
    00761
    00762
    00770 bool IsEngineBuildable(EngineID engine, VehicleType type, CompanyID company)
    00771 {
    00772   /* check if it's an engine that is in the engine array */
    00773   if (!IsEngineIndex(engine)) return false;
    00774
    00775   const Engine *e = GetEngine(engine);
    00776
    00777   /* check if it's an engine of specified type */
    00778   if (e->type != type) return false;
    00779
    00780   /* check if it's available */
    00781   if (!HasBit(e->company_avail, company)) return false;
    00782
    00783   if (type == VEH_TRAIN) {
    00784     /* Check if the rail type is available to this company */
    00785     const Company *c = GetCompany(company);
    00786     if (!HasBit(c->avail_railtypes, RailVehInfo(engine)->railtype)) return false;
    00787   }
    00788
    00789   return true;
    00790 }
    00791
    00798 bool IsEngineRefittable(EngineID engine)
    00799 {
    00800   /* check if it's an engine that is in the engine array */
    00801   if (!IsEngineIndex(engine)) return false;
    00802
    00803   const Engine *e = GetEngine(engine);
    00804
    00805   if (e->type == VEH_SHIP && !e->u.ship.refittable) return false;
    00806
    00807   if (!e->CanCarryCargo()) return false;
    00808
    00809   const EngineInfo *ei = &e->info;
    00810   if (ei->refit_mask == 0) return false;
    00811
    00812   /* Are there suffixes?
    00813    * Note: This does not mean the suffixes are actually available for every consist at any time. */
    00814   if (HasBit(ei->callbackmask, CBM_VEHICLE_CARGO_SUFFIX)) return true;
    00815
    00816   /* Is there any cargo except the default cargo? */
    00817   CargoID default_cargo = e->GetDefaultCargoType();
    00818   return default_cargo != CT_INVALID && ei->refit_mask != 1U << default_cargo;
    00819 }