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galician - 21 changes by Michi
korean - 16 changes by telk5093
welsh - 34 changes by kazzie
galician - 21 changes by Michi
korean - 16 changes by telk5093
welsh - 34 changes by kazzie
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/*
* This file is part of OpenTTD.
* 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.
* 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.
* 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/>.
*/
/** @file roadstop_base.h Base class for roadstops. */
#ifndef ROADSTOP_BASE_H
#define ROADSTOP_BASE_H
#include "station_type.h"
#include "core/pool_type.hpp"
#include "core/bitmath_func.hpp"
#include "vehicle_type.h"
typedef Pool<RoadStop, RoadStopID, 32, 64000> RoadStopPool;
extern RoadStopPool _roadstop_pool;
/** A Stop for a Road Vehicle */
struct RoadStop : RoadStopPool::PoolItem<&_roadstop_pool> {
enum RoadStopStatusFlags {
RSSFB_BAY0_FREE = 0, ///< Non-zero when bay 0 is free
RSSFB_BAY1_FREE = 1, ///< Non-zero when bay 1 is free
RSSFB_BAY_COUNT = 2, ///< Max. number of bays
RSSFB_BASE_ENTRY = 6, ///< Non-zero when the entries on this road stop are the primary, i.e. the ones to delete
RSSFB_ENTRY_BUSY = 7, ///< Non-zero when roadstop entry is busy
};
/** Container for each entry point of a drive through road stop */
struct Entry {
private:
int length; ///< The length of the stop in tile 'units'
int occupied; ///< The amount of occupied stop in tile 'units'
public:
friend struct RoadStop; ///< Oh yeah, the road stop may play with me.
/** Create an entry */
Entry() : length(0), occupied(0) {}
/**
* Get the length of this drive through stop.
* @return the length in tile units.
*/
inline int GetLength() const
{
return this->length;
}
/**
* Get the amount of occupied space in this drive through stop.
* @return the occupied space in tile units.
*/
inline int GetOccupied() const
{
return this->occupied;
}
void Leave(const RoadVehicle *rv);
void Enter(const RoadVehicle *rv);
void CheckIntegrity(const RoadStop *rs) const;
void Rebuild(const RoadStop *rs, int side = -1);
};
TileIndex xy; ///< Position on the map
byte status; ///< Current status of the Stop, @see RoadStopSatusFlag. Access using *Bay and *Busy functions.
struct RoadStop *next; ///< Next stop of the given type at this station
/** Initializes a RoadStop */
inline RoadStop(TileIndex tile = INVALID_TILE) :
xy(tile),
status((1 << RSSFB_BAY_COUNT) - 1)
{ }
~RoadStop();
/**
* Checks whether there is a free bay in this road stop
* @return is at least one bay free?
*/
inline bool HasFreeBay() const
{
return GB(this->status, 0, RSSFB_BAY_COUNT) != 0;
}
/**
* Checks whether the given bay is free in this road stop
* @param nr bay to check
* @return is given bay free?
*/
inline bool IsFreeBay(uint nr) const
{
assert(nr < RSSFB_BAY_COUNT);
return HasBit(this->status, nr);
}
/**
* Checks whether the entrance of the road stop is occupied by a vehicle
* @return is entrance busy?
*/
inline bool IsEntranceBusy() const
{
return HasBit(this->status, RSSFB_ENTRY_BUSY);
}
/**
* Makes an entrance occupied or free
* @param busy If true, marks busy; free otherwise.
*/
inline void SetEntranceBusy(bool busy)
{
SB(this->status, RSSFB_ENTRY_BUSY, 1, busy);
}
/**
* Get the drive through road stop entry struct for the given direction.
* @param dir The direction to get the entry for.
* @return the entry
*/
inline const Entry *GetEntry(DiagDirection dir) const
{
return HasBit((int)dir, 1) ? this->west : this->east;
}
/**
* Get the drive through road stop entry struct for the given direction.
* @param dir The direction to get the entry for.
* @return the entry
*/
inline Entry *GetEntry(DiagDirection dir)
{
return HasBit((int)dir, 1) ? this->west : this->east;
}
void MakeDriveThrough();
void ClearDriveThrough();
void Leave(RoadVehicle *rv);
bool Enter(RoadVehicle *rv);
RoadStop *GetNextRoadStop(const struct RoadVehicle *v) const;
static RoadStop *GetByTile(TileIndex tile, RoadStopType type);
static bool IsDriveThroughRoadStopContinuation(TileIndex rs, TileIndex next);
private:
Entry *east; ///< The vehicles that entered from the east
Entry *west; ///< The vehicles that entered from the west
/**
* Allocates a bay
* @return the allocated bay number
* @pre this->HasFreeBay()
*/
inline uint AllocateBay()
{
assert(this->HasFreeBay());
/* Find the first free bay. If the bit is set, the bay is free. */
uint bay_nr = 0;
while (!HasBit(this->status, bay_nr)) bay_nr++;
ClrBit(this->status, bay_nr);
return bay_nr;
}
/**
* Allocates a bay in a drive-through road stop
* @param nr the number of the bay to allocate
*/
inline void AllocateDriveThroughBay(uint nr)
{
assert(nr < RSSFB_BAY_COUNT);
ClrBit(this->status, nr);
}
/**
* Frees the given bay
* @param nr the number of the bay to free
*/
inline void FreeBay(uint nr)
{
assert(nr < RSSFB_BAY_COUNT);
SetBit(this->status, nr);
}
};
#define FOR_ALL_ROADSTOPS_FROM(var, start) FOR_ALL_ITEMS_FROM(RoadStop, roadstop_index, var, start)
#define FOR_ALL_ROADSTOPS(var) FOR_ALL_ROADSTOPS_FROM(var, 0)
#endif /* ROADSTOP_BASE_H */
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