1 files changed, 82 insertions, 0 deletions
diff --git a/pbs.h b/pbs.h
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--- /dev/null
+++ b/pbs.h
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+#ifndef PBS_H
+#define PBS_H
+
+/** @file pbs.h Path-Based-Signalling header file
+ *  @see pbs.c */
+
+#include "vehicle.h"
+#include "tile.h"
+#include "map.h"
+#include "rail.h"
+
+/**
+ * constants used for pbs_mode argument of npf-functions
+ */
+enum pbs_modes {
+	PBS_MODE_NONE = 0,    // no pbs
+	PBS_MODE_GREEN = 1,   // look for green exit signal from pbs block
+	PBS_MODE_ANY = 2,     // look for any exit signal from block
+};
+
+/**
+ * constants used for v->u.rail.pbs_status
+ */
+enum PBSStatus {
+	PBS_STAT_NONE = 0,
+	PBS_STAT_HAS_PATH = 1,
+	PBS_STAT_NEED_PATH = 2,
+};
+
+
+void PBSReserveTrack(TileIndex tile, Track track);
+/**<
+ * Marks a track as reserved.
+ * @param tile The tile of the track.
+ * @param track The track to reserve, valid values 0-5.
+ */
+
+byte PBSTileReserved(TileIndex tile);
+/**<
+ * Check which tracks are reserved on a tile.
+ * @param tile The tile which you want to check.
+ * @return The tracks reserved on that tile, each of the bits 0-5 is set when the corresponding track is reserved.
+ */
+
+uint16 PBSTileUnavail(TileIndex tile);
+/**<
+ * Check which trackdirs are unavailable due to reserved tracks on a tile.
+ * @param tile The tile which you want to check.
+ * @return The tracks reserved on that tile, each of the bits 0-5,8-13 is set when the corresponding trackdir is unavailable.
+ */
+
+void PBSClearTrack(TileIndex tile, Track track);
+/**<
+ * Unreserves a track.
+ * @param tile The tile of the track.
+ * @param track The track to unreserve, valid values 0-5.
+ */
+
+void PBSClearPath(TileIndex tile, Trackdir trackdir);
+/**<
+ * Follows a planned(reserved) path, and unreserves the tracks.
+ * @param tile The tile on which the path starts
+ * @param trackdir The trackdirection in which the path starts
+ */
+
+bool PBSIsPbsSignal(TileIndex tile, Trackdir trackdir);
+/**<
+ * Checks if there are pbs signals on a track.
+ * @param tile The tile you want to check
+ * @param trackdir The trackdir you want to check
+ * @return True when there are pbs signals on that tile
+ */
+
+bool PBSIsPbsDepot(uint tile);
+/**<
+ * Checks if a depot is inside a pbs block.
+ * Tis means that the block it is in needs to have at least 1 signal, and that all signals in it need to be pbs signals.
+ * @param tile The depot tile to check
+ * @return True when the depot is inside a pbs block.
+ */
+
+#endif