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/* $Id$ */
/*
* 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 pbs.h PBS support routines */
#ifndef PBS_H
#define PBS_H
#include "tile_type.h"
#include "direction_type.h"
#include "track_type.h"
#include "vehicle_type.h"
TrackBits GetReservedTrackbits(TileIndex t);
void SetRailStationPlatformReservation(TileIndex start, DiagDirection dir, bool b);
bool TryReserveRailTrack(TileIndex tile, Track t, bool trigger_stations = true);
void UnreserveRailTrack(TileIndex tile, Track t);
/** This struct contains information about the end of a reserved path. */
struct PBSTileInfo {
TileIndex tile; ///< Tile the path ends, INVALID_TILE if no valid path was found.
Trackdir trackdir; ///< The reserved trackdir on the tile.
bool okay; ///< True if tile is a safe waiting position, false otherwise.
/**
* Create an empty PBSTileInfo.
*/
PBSTileInfo() : tile(INVALID_TILE), trackdir(INVALID_TRACKDIR), okay(false) {}
/**
* Create a PBSTileInfo with given tile, track direction and safe waiting position information.
* @param _t The tile where the path ends.
* @param _td The reserved track dir on the tile.
* @param _okay Whether the tile is a safe waiting point or not.
*/
PBSTileInfo(TileIndex _t, Trackdir _td, bool _okay) : tile(_t), trackdir(_td), okay(_okay) {}
};
PBSTileInfo FollowTrainReservation(const Train *v, Vehicle **train_on_res = nullptr);
bool IsSafeWaitingPosition(const Train *v, TileIndex tile, Trackdir trackdir, bool include_line_end, bool forbid_90deg = false);
bool IsWaitingPositionFree(const Train *v, TileIndex tile, Trackdir trackdir, bool forbid_90deg = false);
Train *GetTrainForReservation(TileIndex tile, Track track);
/**
* Check whether some of tracks is reserved on a tile.
*
* @param tile the tile
* @param tracks the tracks to test
* @return true if at least on of tracks is reserved
*/
static inline bool HasReservedTracks(TileIndex tile, TrackBits tracks)
{
return (GetReservedTrackbits(tile) & tracks) != TRACK_BIT_NONE;
}
#endif /* PBS_H */
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