tron@2186: /* $Id$ */
tron@2186: 
rubidium@8138: /** @file signal_func.h Functions related to signals. */
celestar@2274: 
rubidium@8138: #ifndef SIGNAL_FUNC_H
rubidium@8138: #define SIGNAL_FUNC_H
celestar@2254: 
rubidium@8138: #include "track_type.h"
smatz@8238: #include "tile_type.h"
smatz@8238: #include "direction_type.h"
smatz@8238: #include "track_type.h"
smatz@8300: #include "player_type.h"
matthijs@1942: 
matthijs@1942: /**
matthijs@1942:  * Maps a trackdir to the bit that stores its status in the map arrays, in the
matthijs@1942:  * direction along with the trackdir.
matthijs@1942:  */
rubidium@6162: static inline byte SignalAlongTrackdir(Trackdir trackdir)
rubidium@6162: {
rubidium@6162: 	extern const byte _signal_along_trackdir[TRACKDIR_END];
rubidium@6162: 	return _signal_along_trackdir[trackdir];
rubidium@6162: }
matthijs@1942: 
matthijs@1942: /**
matthijs@1942:  * Maps a trackdir to the bit that stores its status in the map arrays, in the
matthijs@1942:  * direction against the trackdir.
matthijs@1942:  */
rubidium@6162: static inline byte SignalAgainstTrackdir(Trackdir trackdir)
rubidium@6162: {
matthijs@1948: 	extern const byte _signal_against_trackdir[TRACKDIR_END];
matthijs@1948: 	return _signal_against_trackdir[trackdir];
matthijs@1948: }
matthijs@1942: 
matthijs@1942: /**
matthijs@1942:  * Maps a Track to the bits that store the status of the two signals that can
matthijs@1942:  * be present on the given track.
matthijs@1942:  */
rubidium@6162: static inline byte SignalOnTrack(Track track)
rubidium@6162: {
matthijs@1948: 	extern const byte _signal_on_track[TRACK_END];
matthijs@1948: 	return _signal_on_track[track];
matthijs@1948: }
matthijs@1942: 
smatz@9222: /** State of the signal segment */
smatz@9222: enum SigSegState {
smatz@9222: 	SIGSEG_FREE,    ///< Free and has no pre-signal exits or at least one green exit
smatz@9222: 	SIGSEG_FULL,    ///< Occupied by a train
rubidium@9818: 	SIGSEG_PBS,     ///< Segment is a PBS segment
smatz@9222: };
smatz@9222: 
smatz@9222: SigSegState UpdateSignalsOnSegment(TileIndex tile, DiagDirection side, Owner owner);
smatz@8300: void SetSignalsOnBothDir(TileIndex tile, Track track, Owner owner);
smatz@8306: void AddTrackToSignalBuffer(TileIndex tile, Track track, Owner owner);
smatz@8306: void AddSideToSignalBuffer(TileIndex tile, DiagDirection side, Owner owner);
smatz@8306: void UpdateSignalsInBuffer();
smatz@8238: 
rubidium@8138: #endif /* SIGNAL_FUNC_H */