engine.cpp

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00001 /* $Id: engine.cpp 15434 2009-02-09 21:20:05Z 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 
00033 Year _year_engine_aging_stops;
00034 
00036 const uint8 _engine_counts[4] = {
00037   lengthof(_orig_rail_vehicle_info),
00038   lengthof(_orig_road_vehicle_info),
00039   lengthof(_orig_ship_vehicle_info),
00040   lengthof(_orig_aircraft_vehicle_info),
00041 };
00042 
00044 const uint8 _engine_offsets[4] = {
00045   0,
00046   lengthof(_orig_rail_vehicle_info),
00047   lengthof(_orig_rail_vehicle_info) + lengthof(_orig_road_vehicle_info),
00048   lengthof(_orig_rail_vehicle_info) + lengthof(_orig_road_vehicle_info) + lengthof(_orig_ship_vehicle_info),
00049 };
00050 
00051 Engine::Engine() :
00052   name(NULL),
00053   overrides_count(0),
00054   overrides(NULL)
00055 {
00056 }
00057 
00058 Engine::Engine(VehicleType type, EngineID base)
00059 {
00060   this->type = type;
00061   this->internal_id = base;
00062   this->list_position = base;
00063 
00064   /* Check if this base engine is within the original engine data range */
00065   if (base >= _engine_counts[type]) {
00066     /* Mark engine as valid anyway */
00067     this->info.climates = 0x80;
00068     /* Set model life to maximum to make wagons available */
00069     this->info.base_life = 0xFF;
00070     return;
00071   }
00072 
00073   /* Copy the original engine info for this slot */
00074   this->info = _orig_engine_info[_engine_offsets[type] + base];
00075 
00076   /* Copy the original engine data for this slot */
00077   switch (type) {
00078     default: NOT_REACHED();
00079 
00080     case VEH_TRAIN:
00081       this->u.rail = _orig_rail_vehicle_info[base];
00082       this->image_index = this->u.rail.image_index;
00083       this->info.string_id = STR_8000_KIRBY_PAUL_TANK_STEAM + base;
00084 
00085       /* Set the default model life of original wagons to "infinite" */
00086       if (this->u.rail.railveh_type == RAILVEH_WAGON) this->info.base_life = 0xFF;
00087 
00088       break;
00089 
00090     case VEH_ROAD:
00091       this->u.road = _orig_road_vehicle_info[base];
00092       this->image_index = this->u.road.image_index;
00093       this->info.string_id = STR_8074_MPS_REGAL_BUS + base;
00094       break;
00095 
00096     case VEH_SHIP:
00097       this->u.ship = _orig_ship_vehicle_info[base];
00098       this->image_index = this->u.ship.image_index;
00099       this->info.string_id = STR_80CC_MPS_OIL_TANKER + base;
00100       break;
00101 
00102     case VEH_AIRCRAFT:
00103       this->u.air = _orig_aircraft_vehicle_info[base];
00104       this->image_index = this->u.air.image_index;
00105       this->info.string_id = STR_80D7_SAMPSON_U52 + base;
00106       break;
00107   }
00108 }
00109 
00110 Engine::~Engine()
00111 {
00112   UnloadWagonOverrides(this);
00113   free(this->name);
00114 }
00115 
00116 Money Engine::GetRunningCost() const
00117 {
00118   switch (this->type) {
00119     case VEH_ROAD:
00120       return this->u.road.running_cost * GetPriceByIndex(this->u.road.running_cost_class) >> 8;
00121 
00122     case VEH_TRAIN:
00123       return GetEngineProperty(this->index, 0x0D, this->u.rail.running_cost) * GetPriceByIndex(this->u.rail.running_cost_class) >> 8;
00124 
00125     case VEH_SHIP:
00126       return GetEngineProperty(this->index, 0x0F, this->u.ship.running_cost) * _price.ship_running >> 8;
00127 
00128     case VEH_AIRCRAFT:
00129       return GetEngineProperty(this->index, 0x0E, this->u.air.running_cost) * _price.aircraft_running >> 8;
00130 
00131     default: NOT_REACHED();
00132   }
00133 }
00134 
00135 Money Engine::GetCost() const
00136 {
00137   switch (this->type) {
00138     case VEH_ROAD:
00139       return GetEngineProperty(this->index, 0x11, this->u.road.cost_factor) * (_price.roadveh_base >> 3) >> 5;
00140 
00141     case VEH_TRAIN:
00142       if (this->u.rail.railveh_type == RAILVEH_WAGON) {
00143         return (GetEngineProperty(this->index, 0x17, this->u.rail.cost_factor) * _price.build_railwagon) >> 8;
00144       } else {
00145         return GetEngineProperty(this->index, 0x17, this->u.rail.cost_factor) * (_price.build_railvehicle >> 3) >> 5;
00146       }
00147     case VEH_SHIP:
00148       return GetEngineProperty(this->index, 0x0A, this->u.ship.cost_factor) * (_price.ship_base >> 3) >> 5;
00149 
00150     case VEH_AIRCRAFT:
00151       return GetEngineProperty(this->index, 0x0B, this->u.air.cost_factor) * (_price.aircraft_base >> 3) >> 5;
00152 
00153     default: NOT_REACHED();
00154   }
00155 }
00156 
00161 uint Engine::GetDisplayMaxSpeed() const
00162 {
00163   switch (this->type) {
00164     case VEH_TRAIN:
00165       return GetEngineProperty(this->index, 0x09, this->u.rail.max_speed);
00166 
00167     case VEH_ROAD:
00168       return this->u.road.max_speed / 2;
00169 
00170     case VEH_SHIP:
00171       return GetEngineProperty(this->index, 0x0B, this->u.ship.max_speed) / 2;
00172 
00173     case VEH_AIRCRAFT:
00174       return this->u.air.max_speed;
00175 
00176     default: NOT_REACHED();
00177   }
00178 }
00179 
00180 uint Engine::GetPower() const
00181 {
00182   /* Currently only trains have 'power' */
00183   switch (this->type) {
00184     case VEH_TRAIN:
00185       return GetEngineProperty(this->index, 0x0B, this->u.rail.power);
00186 
00187     default: NOT_REACHED();
00188   }
00189 }
00190 
00196 uint Engine::GetDisplayWeight() const
00197 {
00198   /* Currently only trains have 'weight' */
00199   switch (this->type) {
00200     case VEH_TRAIN:
00201       return GetEngineProperty(this->index, 0x16, this->u.rail.weight) << (this->u.rail.railveh_type == RAILVEH_MULTIHEAD ? 1 : 0);
00202 
00203     default: NOT_REACHED();
00204   }
00205 }
00206 
00209 void SetCachedEngineCounts()
00210 {
00211   uint engines = GetEnginePoolSize();
00212 
00213   /* Set up the engine count for all companies */
00214   Company *c;
00215   FOR_ALL_COMPANIES(c) {
00216     free(c->num_engines);
00217     c->num_engines = CallocT<EngineID>(engines);
00218   }
00219 
00220   /* Recalculate */
00221   Group *g;
00222   FOR_ALL_GROUPS(g) {
00223     free(g->num_engines);
00224     g->num_engines = CallocT<EngineID>(engines);
00225   }
00226 
00227   const Vehicle *v;
00228   FOR_ALL_VEHICLES(v) {
00229     if (!IsEngineCountable(v)) continue;
00230 
00231     assert(v->engine_type < engines);
00232 
00233     GetCompany(v->owner)->num_engines[v->engine_type]++;
00234 
00235     if (v->group_id == DEFAULT_GROUP) continue;
00236 
00237     g = GetGroup(v->group_id);
00238     assert(v->type == g->vehicle_type);
00239     assert(v->owner == g->owner);
00240 
00241     g->num_engines[v->engine_type]++;
00242   }
00243 }
00244 
00245 void SetupEngines()
00246 {
00247   _Engine_pool.CleanPool();
00248   _Engine_pool.AddBlockToPool();
00249 
00250   for (uint i = 0; i < lengthof(_orig_rail_vehicle_info); i++) new Engine(VEH_TRAIN, i);
00251   for (uint i = 0; i < lengthof(_orig_road_vehicle_info); i++) new Engine(VEH_ROAD, i);
00252   for (uint i = 0; i < lengthof(_orig_ship_vehicle_info); i++) new Engine(VEH_SHIP, i);
00253   for (uint i = 0; i < lengthof(_orig_aircraft_vehicle_info); i++) new Engine(VEH_AIRCRAFT, i);
00254 }
00255 
00256 
00257 void ShowEnginePreviewWindow(EngineID engine);
00258 
00259 /* Determine if an engine type is a wagon (and not a loco) */
00260 static bool IsWagon(EngineID index)
00261 {
00262   const Engine *e = GetEngine(index);
00263   return e->type == VEH_TRAIN && e->u.rail.railveh_type == RAILVEH_WAGON;
00264 }
00265 
00266 static void CalcEngineReliability(Engine *e)
00267 {
00268   uint age = e->age;
00269 
00270   /* Check for early retirement */
00271   if (e->company_avail != 0 && !_settings_game.vehicle.never_expire_vehicles && e->info.base_life != 0xFF) {
00272     int retire_early = e->info.retire_early;
00273     uint retire_early_max_age = max(0, e->duration_phase_1 + e->duration_phase_2 - retire_early * 12);
00274     if (retire_early != 0 && age >= retire_early_max_age) {
00275       /* Early retirement is enabled and we're past the date... */
00276       e->company_avail = 0;
00277       AddRemoveEngineFromAutoreplaceAndBuildWindows(e->type);
00278     }
00279   }
00280 
00281   if (age < e->duration_phase_1) {
00282     uint start = e->reliability_start;
00283     e->reliability = age * (e->reliability_max - start) / e->duration_phase_1 + start;
00284   } else if ((age -= e->duration_phase_1) < e->duration_phase_2 || _settings_game.vehicle.never_expire_vehicles || e->info.base_life == 0xFF) {
00285     /* We are at the peak of this engines life. It will have max reliability.
00286      * This is also true if the engines never expire. They will not go bad over time */
00287     e->reliability = e->reliability_max;
00288   } else if ((age -= e->duration_phase_2) < e->duration_phase_3) {
00289     uint max = e->reliability_max;
00290     e->reliability = (int)age * (int)(e->reliability_final - max) / e->duration_phase_3 + max;
00291   } else {
00292     /* time's up for this engine.
00293      * We will now completely retire this design */
00294     e->company_avail = 0;
00295     e->reliability = e->reliability_final;
00296     /* Kick this engine out of the lists */
00297     AddRemoveEngineFromAutoreplaceAndBuildWindows(e->type);
00298   }
00299   InvalidateWindowClasses(WC_BUILD_VEHICLE); // Update to show the new reliability
00300   InvalidateWindowClasses(WC_REPLACE_VEHICLE);
00301 }
00302 
00303 void SetYearEngineAgingStops()
00304 {
00305   /* Determine last engine aging year, default to 2050 as previously. */
00306   _year_engine_aging_stops = 2050;
00307 
00308   const Engine *e;
00309   FOR_ALL_ENGINES(e) {
00310     const EngineInfo *ei = &e->info;
00311 
00312     /* Exclude certain engines */
00313     if (!HasBit(ei->climates, _settings_game.game_creation.landscape)) continue;
00314     if (e->type == VEH_TRAIN && e->u.rail.railveh_type == RAILVEH_WAGON) continue;
00315 
00316     /* Base year ending date on half the model life */
00317     YearMonthDay ymd;
00318     ConvertDateToYMD(ei->base_intro + (ei->lifelength * DAYS_IN_LEAP_YEAR) / 2, &ymd);
00319 
00320     _year_engine_aging_stops = max(_year_engine_aging_stops, ymd.year);
00321   }
00322 }
00323 
00324 void StartupOneEngine(Engine *e, Date aging_date)
00325 {
00326   const EngineInfo *ei = &e->info;
00327   uint32 r;
00328 
00329   e->age = 0;
00330   e->flags = 0;
00331   e->company_avail = 0;
00332 
00333   /* The magic value of 729 days below comes from the NewGRF spec. If the
00334    * base intro date is before 1922 then the random number of days is not
00335    * added. */
00336   r = Random();
00337   e->intro_date = ei->base_intro <= ConvertYMDToDate(1922, 0, 1) ? ei->base_intro : (Date)GB(r, 0, 9) + ei->base_intro;
00338   if (e->intro_date <= _date) {
00339     e->age = (aging_date - e->intro_date) >> 5;
00340     e->company_avail = (CompanyMask)-1;
00341     e->flags |= ENGINE_AVAILABLE;
00342   }
00343 
00344   e->reliability_start = GB(r, 16, 14) + 0x7AE0;
00345   r = Random();
00346   e->reliability_max   = GB(r,  0, 14) + 0xBFFF;
00347   e->reliability_final = GB(r, 16, 14) + 0x3FFF;
00348 
00349   r = Random();
00350   e->duration_phase_1 = GB(r, 0, 5) + 7;
00351   e->duration_phase_2 = GB(r, 5, 4) + ei->base_life * 12 - 96;
00352   e->duration_phase_3 = GB(r, 9, 7) + 120;
00353 
00354   e->reliability_spd_dec = ei->decay_speed << 2;
00355 
00356   CalcEngineReliability(e);
00357 
00358   e->lifelength = ei->lifelength + _settings_game.vehicle.extend_vehicle_life;
00359 
00360   /* prevent certain engines from ever appearing. */
00361   if (!HasBit(ei->climates, _settings_game.game_creation.landscape)) {
00362     e->flags |= ENGINE_AVAILABLE;
00363     e->company_avail = 0;
00364   }
00365 }
00366 
00367 void StartupEngines()
00368 {
00369   Engine *e;
00370   /* Aging of vehicles stops, so account for that when starting late */
00371   const Date aging_date = min(_date, ConvertYMDToDate(_year_engine_aging_stops, 0, 1));
00372 
00373   FOR_ALL_ENGINES(e) {
00374     StartupOneEngine(e, aging_date);
00375   }
00376 
00377   /* Update the bitmasks for the vehicle lists */
00378   Company *c;
00379   FOR_ALL_COMPANIES(c) {
00380     c->avail_railtypes = GetCompanyRailtypes(c->index);
00381     c->avail_roadtypes = GetCompanyRoadtypes(c->index);
00382   }
00383 }
00384 
00385 static void AcceptEnginePreview(EngineID eid, CompanyID company)
00386 {
00387   Engine *e = GetEngine(eid);
00388   Company *c = GetCompany(company);
00389 
00390   SetBit(e->company_avail, company);
00391   if (e->type == VEH_TRAIN) {
00392     const RailVehicleInfo *rvi = RailVehInfo(eid);
00393 
00394     assert(rvi->railtype < RAILTYPE_END);
00395     SetBit(c->avail_railtypes, rvi->railtype);
00396   } else if (e->type == VEH_ROAD) {
00397     SetBit(c->avail_roadtypes, HasBit(EngInfo(eid)->misc_flags, EF_ROAD_TRAM) ? ROADTYPE_TRAM : ROADTYPE_ROAD);
00398   }
00399 
00400   e->preview_company_rank = 0xFF;
00401   if (company == _local_company) {
00402     AddRemoveEngineFromAutoreplaceAndBuildWindows(e->type);
00403   }
00404 }
00405 
00406 static CompanyID GetBestCompany(uint8 pp)
00407 {
00408   const Company *c;
00409   int32 best_hist;
00410   CompanyID best_company;
00411   CompanyMask mask = 0;
00412 
00413   do {
00414     best_hist = -1;
00415     best_company = INVALID_COMPANY;
00416     FOR_ALL_COMPANIES(c) {
00417       if (c->block_preview == 0 && !HasBit(mask, c->index) &&
00418           c->old_economy[0].performance_history > best_hist) {
00419         best_hist = c->old_economy[0].performance_history;
00420         best_company = c->index;
00421       }
00422     }
00423 
00424     if (best_company == INVALID_COMPANY) return INVALID_COMPANY;
00425 
00426     SetBit(mask, best_company);
00427   } while (--pp != 0);
00428 
00429   return best_company;
00430 }
00431 
00432 void EnginesDailyLoop()
00433 {
00434   if (_cur_year >= _year_engine_aging_stops) return;
00435 
00436   Engine *e;
00437   FOR_ALL_ENGINES(e) {
00438     EngineID i = e->index;
00439     if (e->flags & ENGINE_EXCLUSIVE_PREVIEW) {
00440       if (e->flags & ENGINE_OFFER_WINDOW_OPEN) {
00441         if (e->preview_company_rank != 0xFF && !--e->preview_wait) {
00442           e->flags &= ~ENGINE_OFFER_WINDOW_OPEN;
00443           DeleteWindowById(WC_ENGINE_PREVIEW, i);
00444           e->preview_company_rank++;
00445         }
00446       } else if (e->preview_company_rank != 0xFF) {
00447         CompanyID best_company = GetBestCompany(e->preview_company_rank);
00448 
00449         if (best_company == INVALID_COMPANY) {
00450           e->preview_company_rank = 0xFF;
00451           continue;
00452         }
00453 
00454         e->flags |= ENGINE_OFFER_WINDOW_OPEN;
00455         e->preview_wait = 20;
00456         AI::NewEvent(best_company, new AIEventEnginePreview(i));
00457         if (IsInteractiveCompany(best_company)) ShowEnginePreviewWindow(i);
00458       }
00459     }
00460   }
00461 }
00462 
00470 CommandCost CmdWantEnginePreview(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00471 {
00472   Engine *e;
00473 
00474   if (!IsEngineIndex(p1)) return CMD_ERROR;
00475   e = GetEngine(p1);
00476   if (GetBestCompany(e->preview_company_rank) != _current_company) return CMD_ERROR;
00477 
00478   if (flags & DC_EXEC) AcceptEnginePreview(p1, _current_company);
00479 
00480   return CommandCost();
00481 }
00482 
00483 StringID GetEngineCategoryName(EngineID engine);
00484 
00485 static void NewVehicleAvailable(Engine *e)
00486 {
00487   Vehicle *v;
00488   Company *c;
00489   EngineID index = e->index;
00490 
00491   /* In case the company didn't build the vehicle during the intro period,
00492    * prevent that company from getting future intro periods for a while. */
00493   if (e->flags & ENGINE_EXCLUSIVE_PREVIEW) {
00494     FOR_ALL_COMPANIES(c) {
00495       uint block_preview = c->block_preview;
00496 
00497       if (!HasBit(e->company_avail, c->index)) continue;
00498 
00499       /* We assume the user did NOT build it.. prove me wrong ;) */
00500       c->block_preview = 20;
00501 
00502       FOR_ALL_VEHICLES(v) {
00503         if (v->type == VEH_TRAIN || v->type == VEH_ROAD || v->type == VEH_SHIP ||
00504             (v->type == VEH_AIRCRAFT && IsNormalAircraft(v))) {
00505           if (v->owner == c->index && v->engine_type == index) {
00506             /* The user did prove me wrong, so restore old value */
00507             c->block_preview = block_preview;
00508             break;
00509           }
00510         }
00511       }
00512     }
00513   }
00514 
00515   e->flags = (e->flags & ~ENGINE_EXCLUSIVE_PREVIEW) | ENGINE_AVAILABLE;
00516   AddRemoveEngineFromAutoreplaceAndBuildWindows(e->type);
00517 
00518   /* Now available for all companies */
00519   e->company_avail = (CompanyMask)-1;
00520 
00521   /* Do not introduce new rail wagons */
00522   if (IsWagon(index)) return;
00523 
00524   if (e->type == VEH_TRAIN) {
00525     /* maybe make another rail type available */
00526     RailType railtype = e->u.rail.railtype;
00527     assert(railtype < RAILTYPE_END);
00528     FOR_ALL_COMPANIES(c) SetBit(c->avail_railtypes, railtype);
00529   } else if (e->type == VEH_ROAD) {
00530     /* maybe make another road type available */
00531     FOR_ALL_COMPANIES(c) SetBit(c->avail_roadtypes, HasBit(e->info.misc_flags, EF_ROAD_TRAM) ? ROADTYPE_TRAM : ROADTYPE_ROAD);
00532   }
00533 
00534   AI::BroadcastNewEvent(new AIEventEngineAvailable(index));
00535 
00536   SetDParam(0, GetEngineCategoryName(index));
00537   SetDParam(1, index);
00538   AddNewsItem(STR_NEW_VEHICLE_NOW_AVAILABLE_WITH_TYPE, NS_NEW_VEHICLES, index, 0);
00539 }
00540 
00541 void EnginesMonthlyLoop()
00542 {
00543   if (_cur_year < _year_engine_aging_stops) {
00544     Engine *e;
00545     FOR_ALL_ENGINES(e) {
00546       /* Age the vehicle */
00547       if (e->flags & ENGINE_AVAILABLE && e->age != 0xFFFF) {
00548         e->age++;
00549         CalcEngineReliability(e);
00550       }
00551 
00552       if (!(e->flags & ENGINE_AVAILABLE) && _date >= (e->intro_date + DAYS_IN_YEAR)) {
00553         /* Introduce it to all companies */
00554         NewVehicleAvailable(e);
00555       } else if (!(e->flags & (ENGINE_AVAILABLE|ENGINE_EXCLUSIVE_PREVIEW)) && _date >= e->intro_date) {
00556         /* Introduction date has passed.. show introducing dialog to one companies. */
00557         e->flags |= ENGINE_EXCLUSIVE_PREVIEW;
00558 
00559         /* Do not introduce new rail wagons */
00560         if (!IsWagon(e->index))
00561           e->preview_company_rank = 1; // Give to the company with the highest rating.
00562       }
00563     }
00564   }
00565 }
00566 
00567 static bool IsUniqueEngineName(const char *name)
00568 {
00569   const Engine *e;
00570 
00571   FOR_ALL_ENGINES(e) {
00572     if (e->name != NULL && strcmp(e->name, name) == 0) return false;
00573   }
00574 
00575   return true;
00576 }
00577 
00584 CommandCost CmdRenameEngine(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00585 {
00586   if (!IsEngineIndex(p1)) return CMD_ERROR;
00587 
00588   bool reset = StrEmpty(text);
00589 
00590   if (!reset) {
00591     if (strlen(text) >= MAX_LENGTH_ENGINE_NAME_BYTES) return CMD_ERROR;
00592     if (!IsUniqueEngineName(text)) return_cmd_error(STR_NAME_MUST_BE_UNIQUE);
00593   }
00594 
00595   if (flags & DC_EXEC) {
00596     Engine *e = GetEngine(p1);
00597     free(e->name);
00598 
00599     if (reset) {
00600       e->name = NULL;
00601     } else {
00602       e->name = strdup(text);
00603     }
00604 
00605     MarkWholeScreenDirty();
00606   }
00607 
00608   return CommandCost();
00609 }
00610 
00611 
00619 bool IsEngineBuildable(EngineID engine, VehicleType type, CompanyID company)
00620 {
00621   /* check if it's an engine that is in the engine array */
00622   if (!IsEngineIndex(engine)) return false;
00623 
00624   const Engine *e = GetEngine(engine);
00625 
00626   /* check if it's an engine of specified type */
00627   if (e->type != type) return false;
00628 
00629   /* check if it's available */
00630   if (!HasBit(e->company_avail, company)) return false;
00631 
00632   if (type == VEH_TRAIN) {
00633     /* Check if the rail type is available to this company */
00634     const Company *c = GetCompany(company);
00635     if (!HasBit(c->avail_railtypes, RailVehInfo(engine)->railtype)) return false;
00636   }
00637 
00638   return true;
00639 }
00640 
00646 bool IsEngineRefittable(EngineID engine)
00647 {
00648   /* check if it's an engine that is in the engine array */
00649   if (!IsEngineIndex(engine)) return false;
00650 
00651   const Engine *e = GetEngine(engine);
00652 
00653   if (e->type == VEH_SHIP && !e->u.ship.refittable) return false;
00654 
00655   const EngineInfo *ei = &e->info;
00656   if (ei->refit_mask == 0) return false;
00657 
00658   /* Are there suffixes?
00659    * Note: This does not mean the suffixes are actually available for every consist at any time. */
00660   if (HasBit(ei->callbackmask, CBM_VEHICLE_CARGO_SUFFIX)) return true;
00661 
00662   /* Is there any cargo except the default cargo? */
00663   CargoID default_cargo = GetEngineCargoType(engine);
00664   return default_cargo != CT_INVALID && ei->refit_mask != 1U << default_cargo;
00665 }
00666 
00671 CargoID GetEngineCargoType(EngineID engine)
00672 {
00673   assert(IsEngineIndex(engine));
00674 
00675   switch (GetEngine(engine)->type) {
00676     case VEH_TRAIN:
00677       if (RailVehInfo(engine)->capacity == 0) return CT_INVALID;
00678       return RailVehInfo(engine)->cargo_type;
00679 
00680     case VEH_ROAD:
00681       if (RoadVehInfo(engine)->capacity == 0) return CT_INVALID;
00682       return RoadVehInfo(engine)->cargo_type;
00683 
00684     case VEH_SHIP:
00685       if (ShipVehInfo(engine)->capacity == 0) return CT_INVALID;
00686       return ShipVehInfo(engine)->cargo_type;
00687 
00688     case VEH_AIRCRAFT:
00689       /* all aircraft starts as passenger planes with cargo capacity */
00690       return CT_PASSENGERS;
00691 
00692     default: NOT_REACHED(); return CT_INVALID;
00693   }
00694 }

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