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Location: cpp/openttd-patchpack/source/src/engine.cpp - annotation
r11406:d38afaf3cfac
23.2 KiB
text/x-c
(svn r15768) -Change: remove an "experimental" marker for something that has been working fine for a long time and remove the ununderstandable part of the description.
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r11188:143f3c64befd r11188:143f3c64befd r10430:9babbda02879 r10430:9babbda02879 r10430:9babbda02879 r10430:9babbda02879 r10430:9babbda02879 r10430:9babbda02879 r10430:9babbda02879 r10430:9babbda02879 r11188:143f3c64befd r10430:9babbda02879 r10430:9babbda02879 | /* $Id$ */
/** @file engine.cpp Base for all engine handling. */
#include "stdafx.h"
#include "debug.h"
#include "company_func.h"
#include "command_func.h"
#include "news_func.h"
#include "variables.h"
#include "aircraft.h"
#include "newgrf_engine.h"
#include "group.h"
#include "strings_func.h"
#include "gfx_func.h"
#include "core/random_func.hpp"
#include "window_func.h"
#include "date_func.h"
#include "autoreplace_gui.h"
#include "string_func.h"
#include "oldpool_func.h"
#include "ai/ai.hpp"
#include "vehicle_func.h"
#include "settings_type.h"
#include "table/strings.h"
#include "table/engines.h"
DEFINE_OLD_POOL_GENERIC(Engine, Engine)
EngineOverrideManager _engine_mngr;
/** Year that engine aging stops. Engines will not reduce in reliability
* and no more engines will be introduced */
Year _year_engine_aging_stops;
/** Number of engines of each vehicle type in original engine data */
const uint8 _engine_counts[4] = {
lengthof(_orig_rail_vehicle_info),
lengthof(_orig_road_vehicle_info),
lengthof(_orig_ship_vehicle_info),
lengthof(_orig_aircraft_vehicle_info),
};
/** Offset of the first engine of each vehicle type in original engine data */
const uint8 _engine_offsets[4] = {
0,
lengthof(_orig_rail_vehicle_info),
lengthof(_orig_rail_vehicle_info) + lengthof(_orig_road_vehicle_info),
lengthof(_orig_rail_vehicle_info) + lengthof(_orig_road_vehicle_info) + lengthof(_orig_ship_vehicle_info),
};
const uint EngineOverrideManager::NUM_DEFAULT_ENGINES = _engine_counts[VEH_TRAIN] + _engine_counts[VEH_ROAD] + _engine_counts[VEH_SHIP] + _engine_counts[VEH_AIRCRAFT];
Engine::Engine() :
name(NULL),
overrides_count(0),
overrides(NULL)
{
}
Engine::Engine(VehicleType type, EngineID base)
{
this->type = type;
this->internal_id = base;
this->list_position = base;
/* Check if this base engine is within the original engine data range */
if (base >= _engine_counts[type]) {
/* Mark engine as valid anyway */
this->info.climates = 0x80;
/* Set model life to maximum to make wagons available */
this->info.base_life = 0xFF;
return;
}
/* Copy the original engine info for this slot */
this->info = _orig_engine_info[_engine_offsets[type] + base];
/* Copy the original engine data for this slot */
switch (type) {
default: NOT_REACHED();
case VEH_TRAIN:
this->u.rail = _orig_rail_vehicle_info[base];
this->image_index = this->u.rail.image_index;
this->info.string_id = STR_8000_KIRBY_PAUL_TANK_STEAM + base;
/* Set the default model life of original wagons to "infinite" */
if (this->u.rail.railveh_type == RAILVEH_WAGON) this->info.base_life = 0xFF;
break;
case VEH_ROAD:
this->u.road = _orig_road_vehicle_info[base];
this->image_index = this->u.road.image_index;
this->info.string_id = STR_8074_MPS_REGAL_BUS + base;
break;
case VEH_SHIP:
this->u.ship = _orig_ship_vehicle_info[base];
this->image_index = this->u.ship.image_index;
this->info.string_id = STR_80CC_MPS_OIL_TANKER + base;
break;
case VEH_AIRCRAFT:
this->u.air = _orig_aircraft_vehicle_info[base];
this->image_index = this->u.air.image_index;
this->info.string_id = STR_80D7_SAMPSON_U52 + base;
break;
}
}
Engine::~Engine()
{
UnloadWagonOverrides(this);
free(this->name);
}
/**
* Determines the default cargo type of an engine.
*
* Usually a valid cargo is returned, even though the vehicle has zero capacity, and can therefore not carry anything. But the cargotype is still used
* for livery selection etc..
*
* Vehicles with CT_INVALID as default cargo are usally not available, but it can appear as default cargo of articulated parts.
*
* @return The default cargo type.
* @see CanCarryCargo
*/
CargoID Engine::GetDefaultCargoType() const
{
switch (this->type) {
case VEH_TRAIN:
return this->u.rail.cargo_type;
case VEH_ROAD:
return this->u.road.cargo_type;
case VEH_SHIP:
return this->u.ship.cargo_type;
case VEH_AIRCRAFT:
return FindFirstRefittableCargo(this->index);
default: NOT_REACHED();
}
}
/**
* Determines whether an engine can carry something.
* A vehicle cannot carry anything if its capacity is zero, or none of the possible cargos is available in the climate.
* @return true if the vehicle can carry something.
*/
bool Engine::CanCarryCargo() const
{
/* For engines that can appear in a consist (i.e. rail vehicles and (articulated) road vehicles), a capacity
* of zero is a special case, to define the vehicle to not carry anything. The default cargotype is still used
* for livery selection etc.
* Note: Only the property is tested. A capacity callback returning 0 does not have the same effect.
*/
switch (this->type) {
case VEH_TRAIN:
if (this->u.rail.capacity == 0) return false;
break;
case VEH_ROAD:
if (this->u.road.capacity == 0) return false;
break;
case VEH_SHIP:
case VEH_AIRCRAFT:
break;
default: NOT_REACHED();
}
return this->GetDefaultCargoType() != CT_INVALID;
}
/**
* Determines the default cargo capacity of an engine for display purposes.
*
* For planes carrying both passenger and mail this is the passenger capacity.
* For multiheaded engines this is the capacity of both heads.
* For articulated engines use GetCapacityOfArticulatedParts
*
* @return The default capacity
* @see GetDefaultCargoType
*/
uint Engine::GetDisplayDefaultCapacity() const
{
if (!this->CanCarryCargo()) return 0;
switch (type) {
case VEH_TRAIN:
return GetEngineProperty(this->index, 0x14, this->u.rail.capacity) + (this->u.rail.railveh_type == RAILVEH_MULTIHEAD ? this->u.rail.capacity : 0);
case VEH_ROAD:
return GetEngineProperty(this->index, 0x0F, this->u.road.capacity);
case VEH_SHIP:
return GetEngineProperty(this->index, 0x0D, this->u.ship.capacity);
case VEH_AIRCRAFT:
return AircraftDefaultCargoCapacity(this->GetDefaultCargoType(), &this->u.air);
default: NOT_REACHED();
}
}
Money Engine::GetRunningCost() const
{
switch (this->type) {
case VEH_ROAD:
return this->u.road.running_cost * GetPriceByIndex(this->u.road.running_cost_class) >> 8;
case VEH_TRAIN:
return GetEngineProperty(this->index, 0x0D, this->u.rail.running_cost) * GetPriceByIndex(this->u.rail.running_cost_class) >> 8;
case VEH_SHIP:
return GetEngineProperty(this->index, 0x0F, this->u.ship.running_cost) * _price.ship_running >> 8;
case VEH_AIRCRAFT:
return GetEngineProperty(this->index, 0x0E, this->u.air.running_cost) * _price.aircraft_running >> 8;
default: NOT_REACHED();
}
}
Money Engine::GetCost() const
{
switch (this->type) {
case VEH_ROAD:
return GetEngineProperty(this->index, 0x11, this->u.road.cost_factor) * (_price.roadveh_base >> 3) >> 5;
case VEH_TRAIN:
if (this->u.rail.railveh_type == RAILVEH_WAGON) {
return (GetEngineProperty(this->index, 0x17, this->u.rail.cost_factor) * _price.build_railwagon) >> 8;
} else {
return GetEngineProperty(this->index, 0x17, this->u.rail.cost_factor) * (_price.build_railvehicle >> 3) >> 5;
}
case VEH_SHIP:
return GetEngineProperty(this->index, 0x0A, this->u.ship.cost_factor) * (_price.ship_base >> 3) >> 5;
case VEH_AIRCRAFT:
return GetEngineProperty(this->index, 0x0B, this->u.air.cost_factor) * (_price.aircraft_base >> 3) >> 5;
default: NOT_REACHED();
}
}
/**
* Returns max speed for display purposes
* @return max speed in km-ish/h
*/
uint Engine::GetDisplayMaxSpeed() const
{
switch (this->type) {
case VEH_TRAIN:
return GetEngineProperty(this->index, 0x09, this->u.rail.max_speed);
case VEH_ROAD:
return this->u.road.max_speed / 2;
case VEH_SHIP:
return GetEngineProperty(this->index, 0x0B, this->u.ship.max_speed) / 2;
case VEH_AIRCRAFT:
return this->u.air.max_speed;
default: NOT_REACHED();
}
}
uint Engine::GetPower() const
{
/* Currently only trains have 'power' */
switch (this->type) {
case VEH_TRAIN:
return GetEngineProperty(this->index, 0x0B, this->u.rail.power);
default: NOT_REACHED();
}
}
/**
* Returns the weight for display purposes.
* For dual-headed train-engines this is the weight of both heads
* @return weight in display units metric tons
*/
uint Engine::GetDisplayWeight() const
{
/* Currently only trains have 'weight' */
switch (this->type) {
case VEH_TRAIN:
return GetEngineProperty(this->index, 0x16, this->u.rail.weight) << (this->u.rail.railveh_type == RAILVEH_MULTIHEAD ? 1 : 0);
default: NOT_REACHED();
}
}
/**
* Returns the tractive effort for display purposes.
* For dual-headed train-engines this is the tractive effort of both heads
* @return tractive effort in display units kN
*/
uint Engine::GetDisplayMaxTractiveEffort() const
{
/* Currently only trains have 'tractive effort' */
switch (this->type) {
case VEH_TRAIN:
return (10 * this->GetDisplayWeight() * GetEngineProperty(this->index, 0x1F, this->u.rail.tractive_effort)) / 256;
default: NOT_REACHED();
}
}
/**
* Initializes the EngineOverrideManager with the default engines.
*/
void EngineOverrideManager::ResetToDefaultMapping()
{
this->Clear();
for (VehicleType type = VEH_TRAIN; type <= VEH_AIRCRAFT; type++) {
for (uint internal_id = 0; internal_id < _engine_counts[type]; internal_id++) {
EngineIDMapping *eid = this->Append();
eid->type = type;
eid->grfid = INVALID_GRFID;
eid->internal_id = internal_id;
eid->substitute_id = internal_id;
}
}
}
/**
* Looks up an EngineID in the EngineOverrideManager
* @param type Vehicle type
* @param grf_local_id The local id in the newgrf
* @param grfid The GrfID that defines the scope of grf_local_id.
* If a newgrf overrides the engines of another newgrf, the "scope grfid" is the ID of the overridden newgrf.
* If dynnamic_engines is disabled, all newgrf share the same ID scope identified by INVALID_GRFID.
* @return The engine ID if present, or INVALID_ENGINE if not.
*/
EngineID EngineOverrideManager::GetID(VehicleType type, uint16 grf_local_id, uint32 grfid)
{
const EngineIDMapping *end = this->End();
EngineID index = 0;
for (const EngineIDMapping *eid = this->Begin(); eid != end; eid++, index++) {
if (eid->type == type && eid->grfid == grfid && eid->internal_id == grf_local_id) {
return index;
}
}
return INVALID_ENGINE;
}
/** Sets cached values in Company::num_vehicles and Group::num_vehicles
*/
void SetCachedEngineCounts()
{
uint engines = GetEnginePoolSize();
/* Set up the engine count for all companies */
Company *c;
FOR_ALL_COMPANIES(c) {
free(c->num_engines);
c->num_engines = CallocT<EngineID>(engines);
}
/* Recalculate */
Group *g;
FOR_ALL_GROUPS(g) {
free(g->num_engines);
g->num_engines = CallocT<EngineID>(engines);
}
const Vehicle *v;
FOR_ALL_VEHICLES(v) {
if (!IsEngineCountable(v)) continue;
assert(v->engine_type < engines);
GetCompany(v->owner)->num_engines[v->engine_type]++;
if (v->group_id == DEFAULT_GROUP) continue;
g = GetGroup(v->group_id);
assert(v->type == g->vehicle_type);
assert(v->owner == g->owner);
g->num_engines[v->engine_type]++;
}
}
void SetupEngines()
{
_Engine_pool.CleanPool();
_Engine_pool.AddBlockToPool();
assert(_engine_mngr.Length() >= _engine_mngr.NUM_DEFAULT_ENGINES);
const EngineIDMapping *end = _engine_mngr.End();
uint index = 0;
for (const EngineIDMapping *eid = _engine_mngr.Begin(); eid != end; eid++, index++) {
const Engine *e = new Engine(eid->type, eid->internal_id);
assert(e->index == index);
}
}
void ShowEnginePreviewWindow(EngineID engine);
/* Determine if an engine type is a wagon (and not a loco) */
static bool IsWagon(EngineID index)
{
const Engine *e = GetEngine(index);
return e->type == VEH_TRAIN && e->u.rail.railveh_type == RAILVEH_WAGON;
}
static void CalcEngineReliability(Engine *e)
{
uint age = e->age;
/* Check for early retirement */
if (e->company_avail != 0 && !_settings_game.vehicle.never_expire_vehicles && e->info.base_life != 0xFF) {
int retire_early = e->info.retire_early;
uint retire_early_max_age = max(0, e->duration_phase_1 + e->duration_phase_2 - retire_early * 12);
if (retire_early != 0 && age >= retire_early_max_age) {
/* Early retirement is enabled and we're past the date... */
e->company_avail = 0;
AddRemoveEngineFromAutoreplaceAndBuildWindows(e->type);
}
}
if (age < e->duration_phase_1) {
uint start = e->reliability_start;
e->reliability = age * (e->reliability_max - start) / e->duration_phase_1 + start;
} else if ((age -= e->duration_phase_1) < e->duration_phase_2 || _settings_game.vehicle.never_expire_vehicles || e->info.base_life == 0xFF) {
/* We are at the peak of this engines life. It will have max reliability.
* This is also true if the engines never expire. They will not go bad over time */
e->reliability = e->reliability_max;
} else if ((age -= e->duration_phase_2) < e->duration_phase_3) {
uint max = e->reliability_max;
e->reliability = (int)age * (int)(e->reliability_final - max) / e->duration_phase_3 + max;
} else {
/* time's up for this engine.
* We will now completely retire this design */
e->company_avail = 0;
e->reliability = e->reliability_final;
/* Kick this engine out of the lists */
AddRemoveEngineFromAutoreplaceAndBuildWindows(e->type);
}
InvalidateWindowClasses(WC_BUILD_VEHICLE); // Update to show the new reliability
InvalidateWindowClasses(WC_REPLACE_VEHICLE);
}
void SetYearEngineAgingStops()
{
/* Determine last engine aging year, default to 2050 as previously. */
_year_engine_aging_stops = 2050;
const Engine *e;
FOR_ALL_ENGINES(e) {
const EngineInfo *ei = &e->info;
/* Exclude certain engines */
if (!HasBit(ei->climates, _settings_game.game_creation.landscape)) continue;
if (e->type == VEH_TRAIN && e->u.rail.railveh_type == RAILVEH_WAGON) continue;
/* Base year ending date on half the model life */
YearMonthDay ymd;
ConvertDateToYMD(ei->base_intro + (ei->lifelength * DAYS_IN_LEAP_YEAR) / 2, &ymd);
_year_engine_aging_stops = max(_year_engine_aging_stops, ymd.year);
}
}
void StartupOneEngine(Engine *e, Date aging_date)
{
const EngineInfo *ei = &e->info;
uint32 r;
e->age = 0;
e->flags = 0;
e->company_avail = 0;
/* The magic value of 729 days below comes from the NewGRF spec. If the
* base intro date is before 1922 then the random number of days is not
* added. */
r = Random();
e->intro_date = ei->base_intro <= ConvertYMDToDate(1922, 0, 1) ? ei->base_intro : (Date)GB(r, 0, 9) + ei->base_intro;
if (e->intro_date <= _date) {
e->age = (aging_date - e->intro_date) >> 5;
e->company_avail = (CompanyMask)-1;
e->flags |= ENGINE_AVAILABLE;
}
e->reliability_start = GB(r, 16, 14) + 0x7AE0;
r = Random();
e->reliability_max = GB(r, 0, 14) + 0xBFFF;
e->reliability_final = GB(r, 16, 14) + 0x3FFF;
r = Random();
e->duration_phase_1 = GB(r, 0, 5) + 7;
e->duration_phase_2 = GB(r, 5, 4) + ei->base_life * 12 - 96;
e->duration_phase_3 = GB(r, 9, 7) + 120;
e->reliability_spd_dec = ei->decay_speed << 2;
CalcEngineReliability(e);
e->lifelength = ei->lifelength + _settings_game.vehicle.extend_vehicle_life;
/* prevent certain engines from ever appearing. */
if (!HasBit(ei->climates, _settings_game.game_creation.landscape)) {
e->flags |= ENGINE_AVAILABLE;
e->company_avail = 0;
}
}
void StartupEngines()
{
Engine *e;
/* Aging of vehicles stops, so account for that when starting late */
const Date aging_date = min(_date, ConvertYMDToDate(_year_engine_aging_stops, 0, 1));
FOR_ALL_ENGINES(e) {
StartupOneEngine(e, aging_date);
}
/* Update the bitmasks for the vehicle lists */
Company *c;
FOR_ALL_COMPANIES(c) {
c->avail_railtypes = GetCompanyRailtypes(c->index);
c->avail_roadtypes = GetCompanyRoadtypes(c->index);
}
}
static void AcceptEnginePreview(EngineID eid, CompanyID company)
{
Engine *e = GetEngine(eid);
Company *c = GetCompany(company);
SetBit(e->company_avail, company);
if (e->type == VEH_TRAIN) {
const RailVehicleInfo *rvi = RailVehInfo(eid);
assert(rvi->railtype < RAILTYPE_END);
SetBit(c->avail_railtypes, rvi->railtype);
} else if (e->type == VEH_ROAD) {
SetBit(c->avail_roadtypes, HasBit(EngInfo(eid)->misc_flags, EF_ROAD_TRAM) ? ROADTYPE_TRAM : ROADTYPE_ROAD);
}
e->preview_company_rank = 0xFF;
if (company == _local_company) {
AddRemoveEngineFromAutoreplaceAndBuildWindows(e->type);
}
}
static CompanyID GetBestCompany(uint8 pp)
{
const Company *c;
int32 best_hist;
CompanyID best_company;
CompanyMask mask = 0;
do {
best_hist = -1;
best_company = INVALID_COMPANY;
FOR_ALL_COMPANIES(c) {
if (c->block_preview == 0 && !HasBit(mask, c->index) &&
c->old_economy[0].performance_history > best_hist) {
best_hist = c->old_economy[0].performance_history;
best_company = c->index;
}
}
if (best_company == INVALID_COMPANY) return INVALID_COMPANY;
SetBit(mask, best_company);
} while (--pp != 0);
return best_company;
}
void EnginesDailyLoop()
{
if (_cur_year >= _year_engine_aging_stops) return;
Engine *e;
FOR_ALL_ENGINES(e) {
EngineID i = e->index;
if (e->flags & ENGINE_EXCLUSIVE_PREVIEW) {
if (e->flags & ENGINE_OFFER_WINDOW_OPEN) {
if (e->preview_company_rank != 0xFF && !--e->preview_wait) {
e->flags &= ~ENGINE_OFFER_WINDOW_OPEN;
DeleteWindowById(WC_ENGINE_PREVIEW, i);
e->preview_company_rank++;
}
} else if (e->preview_company_rank != 0xFF) {
CompanyID best_company = GetBestCompany(e->preview_company_rank);
if (best_company == INVALID_COMPANY) {
e->preview_company_rank = 0xFF;
continue;
}
e->flags |= ENGINE_OFFER_WINDOW_OPEN;
e->preview_wait = 20;
AI::NewEvent(best_company, new AIEventEnginePreview(i));
if (IsInteractiveCompany(best_company)) ShowEnginePreviewWindow(i);
}
}
}
}
/** Accept an engine prototype. XXX - it is possible that the top-company
* changes while you are waiting to accept the offer? Then it becomes invalid
* @param tile unused
* @param flags operation to perfom
* @param p1 engine-prototype offered
* @param p2 unused
*/
CommandCost CmdWantEnginePreview(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
Engine *e;
if (!IsEngineIndex(p1)) return CMD_ERROR;
e = GetEngine(p1);
if (GetBestCompany(e->preview_company_rank) != _current_company) return CMD_ERROR;
if (flags & DC_EXEC) AcceptEnginePreview(p1, _current_company);
return CommandCost();
}
StringID GetEngineCategoryName(EngineID engine);
static void NewVehicleAvailable(Engine *e)
{
Vehicle *v;
Company *c;
EngineID index = e->index;
/* In case the company didn't build the vehicle during the intro period,
* prevent that company from getting future intro periods for a while. */
if (e->flags & ENGINE_EXCLUSIVE_PREVIEW) {
FOR_ALL_COMPANIES(c) {
uint block_preview = c->block_preview;
if (!HasBit(e->company_avail, c->index)) continue;
/* We assume the user did NOT build it.. prove me wrong ;) */
c->block_preview = 20;
FOR_ALL_VEHICLES(v) {
if (v->type == VEH_TRAIN || v->type == VEH_ROAD || v->type == VEH_SHIP ||
(v->type == VEH_AIRCRAFT && IsNormalAircraft(v))) {
if (v->owner == c->index && v->engine_type == index) {
/* The user did prove me wrong, so restore old value */
c->block_preview = block_preview;
break;
}
}
}
}
}
e->flags = (e->flags & ~ENGINE_EXCLUSIVE_PREVIEW) | ENGINE_AVAILABLE;
AddRemoveEngineFromAutoreplaceAndBuildWindows(e->type);
/* Now available for all companies */
e->company_avail = (CompanyMask)-1;
/* Do not introduce new rail wagons */
if (IsWagon(index)) return;
if (e->type == VEH_TRAIN) {
/* maybe make another rail type available */
RailType railtype = e->u.rail.railtype;
assert(railtype < RAILTYPE_END);
FOR_ALL_COMPANIES(c) SetBit(c->avail_railtypes, railtype);
} else if (e->type == VEH_ROAD) {
/* maybe make another road type available */
FOR_ALL_COMPANIES(c) SetBit(c->avail_roadtypes, HasBit(e->info.misc_flags, EF_ROAD_TRAM) ? ROADTYPE_TRAM : ROADTYPE_ROAD);
}
AI::BroadcastNewEvent(new AIEventEngineAvailable(index));
SetDParam(0, GetEngineCategoryName(index));
SetDParam(1, index);
AddNewsItem(STR_NEW_VEHICLE_NOW_AVAILABLE_WITH_TYPE, NS_NEW_VEHICLES, index, 0);
}
void EnginesMonthlyLoop()
{
if (_cur_year < _year_engine_aging_stops) {
Engine *e;
FOR_ALL_ENGINES(e) {
/* Age the vehicle */
if (e->flags & ENGINE_AVAILABLE && e->age != 0xFFFF) {
e->age++;
CalcEngineReliability(e);
}
if (!(e->flags & ENGINE_AVAILABLE) && _date >= (e->intro_date + DAYS_IN_YEAR)) {
/* Introduce it to all companies */
NewVehicleAvailable(e);
} else if (!(e->flags & (ENGINE_AVAILABLE | ENGINE_EXCLUSIVE_PREVIEW)) && _date >= e->intro_date) {
/* Introduction date has passed.. show introducing dialog to one companies. */
e->flags |= ENGINE_EXCLUSIVE_PREVIEW;
/* Do not introduce new rail wagons */
if (!IsWagon(e->index))
e->preview_company_rank = 1; // Give to the company with the highest rating.
}
}
}
}
static bool IsUniqueEngineName(const char *name)
{
const Engine *e;
FOR_ALL_ENGINES(e) {
if (e->name != NULL && strcmp(e->name, name) == 0) return false;
}
return true;
}
/** Rename an engine.
* @param tile unused
* @param flags operation to perfom
* @param p1 engine ID to rename
* @param p2 unused
*/
CommandCost CmdRenameEngine(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
if (!IsEngineIndex(p1)) return CMD_ERROR;
bool reset = StrEmpty(text);
if (!reset) {
if (strlen(text) >= MAX_LENGTH_ENGINE_NAME_BYTES) return CMD_ERROR;
if (!IsUniqueEngineName(text)) return_cmd_error(STR_NAME_MUST_BE_UNIQUE);
}
if (flags & DC_EXEC) {
Engine *e = GetEngine(p1);
free(e->name);
if (reset) {
e->name = NULL;
} else {
e->name = strdup(text);
}
MarkWholeScreenDirty();
}
return CommandCost();
}
/** Check if an engine is buildable.
* @param engine index of the engine to check.
* @param type the type the engine should be.
* @param company index of the company.
* @return True if an engine is valid, of the specified type, and buildable by
* the given company.
*/
bool IsEngineBuildable(EngineID engine, VehicleType type, CompanyID company)
{
/* check if it's an engine that is in the engine array */
if (!IsEngineIndex(engine)) return false;
const Engine *e = GetEngine(engine);
/* check if it's an engine of specified type */
if (e->type != type) return false;
/* check if it's available */
if (!HasBit(e->company_avail, company)) return false;
if (type == VEH_TRAIN) {
/* Check if the rail type is available to this company */
const Company *c = GetCompany(company);
if (!HasBit(c->avail_railtypes, RailVehInfo(engine)->railtype)) return false;
}
return true;
}
/**
* Check if an engine is refittable.
* Note: Likely you want to use IsArticulatedVehicleRefittable().
* @param engine index of the engine to check.
* @return true if the engine is refittable.
*/
bool IsEngineRefittable(EngineID engine)
{
/* check if it's an engine that is in the engine array */
if (!IsEngineIndex(engine)) return false;
const Engine *e = GetEngine(engine);
if (e->type == VEH_SHIP && !e->u.ship.refittable) return false;
if (!e->CanCarryCargo()) return false;
const EngineInfo *ei = &e->info;
if (ei->refit_mask == 0) return false;
/* Are there suffixes?
* Note: This does not mean the suffixes are actually available for every consist at any time. */
if (HasBit(ei->callbackmask, CBM_VEHICLE_CARGO_SUFFIX)) return true;
/* Is there any cargo except the default cargo? */
CargoID default_cargo = e->GetDefaultCargoType();
return default_cargo != CT_INVALID && ei->refit_mask != 1U << default_cargo;
}
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