From 2bb88255388bedae0d94c9c06751ee8f140a9194 Mon Sep 17 00:00:00 2001
From: rubidium <rubidium@openttd.org>
Date: Sat, 2 Aug 2008 22:47:48 +0000
Subject: [PATCH] (svn r13928) -Add [YAPP]: Function for getting the path
 reservation state of any tile. (michi_cc)

---
 projects/openttd_vs80.vcproj |  8 +++++++
 projects/openttd_vs90.vcproj |  8 +++++++
 source.list                  |  2 ++
 src/pbs.cpp                  | 43 ++++++++++++++++++++++++++++++++++++
 src/pbs.h                    | 13 +++++++++++
 5 files changed, 74 insertions(+)
 create mode 100644 src/pbs.cpp
 create mode 100644 src/pbs.h

diff --git a/projects/openttd_vs80.vcproj b/projects/openttd_vs80.vcproj
index 2d4f9c02e1..b19198b2d1 100644
--- a/projects/openttd_vs80.vcproj
+++ b/projects/openttd_vs80.vcproj
@@ -663,6 +663,10 @@
 				RelativePath=".\..\src\pathfind.cpp"
 				>
 			</File>
+			<File
+				RelativePath=".\..\src\pbs.cpp"
+				>
+			</File>
 			<File
 				RelativePath=".\..\src\players.cpp"
 				>
@@ -1263,6 +1267,10 @@
 				RelativePath=".\..\src\pathfind.h"
 				>
 			</File>
+			<File
+				RelativePath=".\..\src\pbs.h"
+				>
+			</File>
 			<File
 				RelativePath=".\..\src\player_base.h"
 				>
diff --git a/projects/openttd_vs90.vcproj b/projects/openttd_vs90.vcproj
index 4b33a7f358..3523d11dcd 100644
--- a/projects/openttd_vs90.vcproj
+++ b/projects/openttd_vs90.vcproj
@@ -660,6 +660,10 @@
 				RelativePath=".\..\src\pathfind.cpp"
 				>
 			</File>
+			<File
+				RelativePath=".\..\src\pbs.cpp"
+				>
+			</File>
 			<File
 				RelativePath=".\..\src\players.cpp"
 				>
@@ -1260,6 +1264,10 @@
 				RelativePath=".\..\src\pathfind.h"
 				>
 			</File>
+			<File
+				RelativePath=".\..\src\pbs.h"
+				>
+			</File>
 			<File
 				RelativePath=".\..\src\player_base.h"
 				>
diff --git a/source.list b/source.list
index 8624afe241..a46e52a1eb 100644
--- a/source.list
+++ b/source.list
@@ -57,6 +57,7 @@ os_timer.cpp
 	ottdres.rc
 #end
 pathfind.cpp
+pbs.cpp
 players.cpp
 queue.cpp
 rail.cpp
@@ -241,6 +242,7 @@ order_base.h
 order_func.h
 order_type.h
 pathfind.h
+pbs.h
 player_base.h
 player_face.h
 player_func.h
diff --git a/src/pbs.cpp b/src/pbs.cpp
new file mode 100644
index 0000000000..c75eb8caf6
--- /dev/null
+++ b/src/pbs.cpp
@@ -0,0 +1,43 @@
+/* $Id$ */
+
+/** @file pbs.cpp */
+
+#include "stdafx.h"
+#include "openttd.h"
+#include "pbs.h"
+#include "rail_map.h"
+#include "road_map.h"
+#include "station_map.h"
+#include "tunnelbridge_map.h"
+
+/**
+ * Get the reserved trackbits for any tile, regardless of type.
+ * @param t the tile
+ * @return the reserved trackbits. TRACK_BIT_NONE on nothing reserved or
+ *     a tile without rail.
+ */
+TrackBits GetReservedTrackbits(TileIndex t)
+{
+	switch (GetTileType(t)) {
+		case MP_RAILWAY:
+			if (IsRailWaypoint(t) || IsRailDepot(t)) return GetRailWaypointReservation(t);
+			if (IsPlainRailTile(t)) return GetTrackReservation(t);
+			break;
+
+		case MP_ROAD:
+			if (IsLevelCrossing(t)) return GetRailCrossingReservation(t);
+			break;
+
+		case MP_STATION:
+			if (IsRailwayStation(t)) return GetRailStationReservation(t);
+			break;
+
+		case MP_TUNNELBRIDGE:
+			if (GetTunnelBridgeTransportType(t) == TRANSPORT_RAIL) return GetRailTunnelBridgeReservation(t);
+			break;
+
+		default:
+			break;
+	}
+	return TRACK_BIT_NONE;
+}
diff --git a/src/pbs.h b/src/pbs.h
new file mode 100644
index 0000000000..51a9ba2017
--- /dev/null
+++ b/src/pbs.h
@@ -0,0 +1,13 @@
+/* $Id$ */
+
+/** @file pbs.h PBS support routines */
+
+#ifndef PBS_H
+#define PBS_H
+
+#include "tile_type.h"
+#include "track_type.h"
+
+TrackBits GetReservedTrackbits(TileIndex t);
+
+#endif /* PBS_H */