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105 lines
4.4 KiB
C
105 lines
4.4 KiB
C
/*
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* This file is part of OpenTTD.
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* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
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* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file infrastructure_func.h Functions for access to (shared) infrastructure */
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#ifndef INFRASTRUCTURE_FUNC_H
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#define INFRASTRUCTURE_FUNC_H
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#include "vehicle_base.h"
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#include "settings_type.h"
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#include "command_type.h"
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#include "company_func.h"
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#include "tile_map.h"
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void PayStationSharingFee(Vehicle *v, const Station *st);
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void PayDailyTrackSharingFee(Train *v);
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bool CheckSharingChangePossible(VehicleType type, bool new_value);
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void HandleSharingCompanyDeletion(Owner owner);
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void UpdateAllBlockSignals(Owner owner = INVALID_OWNER);
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/**
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* Check whether a vehicle of a given owner and type can use the infrastrucutre of a given company.
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* @param type Type of vehicle we are talking about.
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* @param veh_owner Owner of the vehicle in question.
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* @param infra_owner The owner of the infrastructure.
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* @return True if infrastructure usage is allowed, false otherwise.
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*/
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inline bool IsInfraUsageAllowed(VehicleType type, Owner veh_owner, Owner infra_owner)
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{
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return infra_owner == veh_owner || infra_owner == OWNER_NONE || _settings_game.economy.infrastructure_sharing[type];
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}
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/**
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* Check whether a vehicle of a given owner and type can use the infrastrucutre on a given tile.
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* @param type Type of vehicle we are talking about.
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* @param veh_owner Owner of the vehicle in question.
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* @param tile The tile that may or may not be used.
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* @return True if infrastructure usage is allowed, false otherwise.
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*/
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inline bool IsInfraTileUsageAllowed(VehicleType type, Owner veh_owner, TileIndex tile)
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{
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return IsInfraUsageAllowed(type, veh_owner, GetTileOwner(tile));
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}
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/**
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* Is a vehicle owned by _current_company allowed to use the infrastructure of infra_owner?
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* If this is not allowed, this function provides the appropriate error message.
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* @see IsInfraUsageAllowed
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* @see CheckOwnership
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* @param type Type of vehicle.
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* @param infra_owner Owner of the infrastructure.
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* @param tile Tile of the infrastructure.
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* @return CommandCost indicating success or failure.
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*/
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inline CommandCost CheckInfraUsageAllowed(VehicleType type, Owner infra_owner, TileIndex tile = 0)
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{
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if (infra_owner == OWNER_NONE || _settings_game.economy.infrastructure_sharing[type]) return CommandCost();
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return CheckOwnership(infra_owner, tile);
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}
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/**
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* Check whether a given company can control this vehicle.
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* Controlling a vehicle means permission to start, stop or reverse it or to make it ignore signals.
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* @param v The vehicle which may or may not be controlled.
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* @param o The company which may or may not control this vehicle.
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* @return True if the given company is allowed to control this vehicle.
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*/
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inline bool IsVehicleControlAllowed(const Vehicle *v, Owner o)
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{
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return v->owner == o || (v->type == VEH_TRAIN && IsTileOwner(v->tile, o) && !v->IsChainInDepot());
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}
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/**
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* Check whether _current_company can control this vehicle.
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* If this is not allowed, this function provides the appropriate error message.
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* @see IsVehicleControlAllowed
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* @param v The vehicle which may or may not be controlled.
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* @return CommandCost indicating success or failure.
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*/
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inline CommandCost CheckVehicleControlAllowed(const Vehicle *v)
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{
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if (v->type == VEH_TRAIN && IsTileOwner(v->tile, _current_company) && !v->IsChainInDepot()) return CommandCost();
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return CheckOwnership(v->owner);
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}
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/**
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* Do signal states propagate from the tracks of one owner to the other?
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* @note This function should be consistent, so if it returns true for (a, b) and (b, c),
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* it should also return true for (a, c).
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* @param o1 First track owner.
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* @param o2 Second track owner.
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* @return True if tracks of the two owners are part of the same signal block.
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*/
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inline bool IsOneSignalBlock(Owner o1, Owner o2)
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{
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return o1 == o2 || _settings_game.economy.infrastructure_sharing[VEH_TRAIN];
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}
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#endif /* INFRASTRUCTURE_FUNC_H */
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