rubidium@9723: /* $Id$ */
rubidium@9723: 
rubidium@9723: /** @file signal_func.h Functions related to signals. */
rubidium@9723: 
rubidium@9723: #ifndef SIGNAL_FUNC_H
rubidium@9723: #define SIGNAL_FUNC_H
rubidium@9723: 
rubidium@9723: #include "track_type.h"
rubidium@9724: #include "tile_type.h"
rubidium@9724: #include "direction_type.h"
rubidium@9724: #include "track_type.h"
rubidium@9724: #include "player_type.h"
rubidium@9723: 
rubidium@9723: /**
rubidium@9723:  * Maps a trackdir to the bit that stores its status in the map arrays, in the
rubidium@9723:  * direction along with the trackdir.
rubidium@9723:  */
rubidium@9723: static inline byte SignalAlongTrackdir(Trackdir trackdir)
rubidium@9723: {
rubidium@9723: 	extern const byte _signal_along_trackdir[TRACKDIR_END];
rubidium@9723: 	return _signal_along_trackdir[trackdir];
rubidium@9723: }
rubidium@9723: 
rubidium@9723: /**
rubidium@9723:  * Maps a trackdir to the bit that stores its status in the map arrays, in the
rubidium@9723:  * direction against the trackdir.
rubidium@9723:  */
rubidium@9723: static inline byte SignalAgainstTrackdir(Trackdir trackdir)
rubidium@9723: {
rubidium@9723: 	extern const byte _signal_against_trackdir[TRACKDIR_END];
rubidium@9723: 	return _signal_against_trackdir[trackdir];
rubidium@9723: }
rubidium@9723: 
rubidium@9723: /**
rubidium@9723:  * Maps a Track to the bits that store the status of the two signals that can
rubidium@9723:  * be present on the given track.
rubidium@9723:  */
rubidium@9723: static inline byte SignalOnTrack(Track track)
rubidium@9723: {
rubidium@9723: 	extern const byte _signal_on_track[TRACK_END];
rubidium@9723: 	return _signal_on_track[track];
rubidium@9723: }
rubidium@9723: 
glx@10645: /** State of the signal segment */
glx@10645: enum SigSegState {
glx@10645: 	SIGSEG_FREE,    ///< Free and has no pre-signal exits or at least one green exit
glx@10645: 	SIGSEG_FULL,    ///< Occupied by a train
glx@10645: };
glx@10645: 
glx@10645: SigSegState UpdateSignalsOnSegment(TileIndex tile, DiagDirection side, Owner owner);
rubidium@9724: void SetSignalsOnBothDir(TileIndex tile, Track track, Owner owner);
rubidium@9724: void AddTrackToSignalBuffer(TileIndex tile, Track track, Owner owner);
rubidium@9724: void AddSideToSignalBuffer(TileIndex tile, DiagDirection side, Owner owner);
rubidium@9724: void UpdateSignalsInBuffer();
rubidium@9724: 
rubidium@9723: #endif /* SIGNAL_FUNC_H */