From f6555cf6f81776fa4a09fab2091bbbe43972cddc Mon Sep 17 00:00:00 2001
From: rubidium <rubidium@openttd.org>
Date: Sat, 2 Aug 2008 22:48:01 +0000
Subject: (svn r13929) -Codechange [YAPP]: Reserving and unreserving of single
 tracks is now possible. (michi_cc)

---
 src/pbs.cpp | 116 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 115 insertions(+), 1 deletion(-)

(limited to 'src/pbs.cpp')

diff --git a/src/pbs.cpp b/src/pbs.cpp
index c75eb8caf..631f05c70 100644
--- a/src/pbs.cpp
+++ b/src/pbs.cpp
@@ -1,7 +1,6 @@
 /* $Id$ */
 
 /** @file pbs.cpp */
-
 #include "stdafx.h"
 #include "openttd.h"
 #include "pbs.h"
@@ -9,6 +8,10 @@
 #include "road_map.h"
 #include "station_map.h"
 #include "tunnelbridge_map.h"
+#include "functions.h"
+#include "debug.h"
+#include "direction_func.h"
+#include "settings_type.h"
 
 /**
  * Get the reserved trackbits for any tile, regardless of type.
@@ -41,3 +44,114 @@ TrackBits GetReservedTrackbits(TileIndex t)
 	}
 	return TRACK_BIT_NONE;
 }
+
+/**
+ * Set the reservation for a complete station platform.
+ * @pre IsRailwayStationTile(start)
+ * @param start starting tile of the platform
+ * @param dir the direction in which to follow the platform
+ * @param b the state the reservation should be set to
+ */
+void SetRailwayStationPlatformReservation(TileIndex start, DiagDirection dir, bool b)
+{
+	TileIndex     tile = start;
+	TileIndexDiff diff = TileOffsByDiagDir(dir);
+
+	assert(IsRailwayStationTile(start));
+	assert(GetRailStationAxis(start) == DiagDirToAxis(dir));
+
+	do {
+		SetRailwayStationReservation(tile, b);
+		if (_settings_client.gui.show_track_reservation) MarkTileDirtyByTile(tile);
+		tile = TILE_ADD(tile, diff);
+	} while (IsCompatibleTrainStationTile(tile, start));
+}
+
+/**
+ * Try to reserve a specific track on a tile
+ * @param tile the tile
+ * @param t the track
+ * @return true if reservation was successfull, i.e. the track was
+ *     free and didn't cross any other reserved tracks.
+ */
+bool TryReserveRailTrack(TileIndex tile, Track t)
+{
+	assert((GetTileTrackStatus(tile, TRANSPORT_RAIL, 0) & TrackToTrackBits(t)) != 0);
+
+	if (_settings_client.gui.show_track_reservation) {
+		MarkTileDirtyByTile(tile);
+	}
+
+	switch (GetTileType(tile)) {
+		case MP_RAILWAY:
+			if (IsPlainRailTile(tile)) return TryReserveTrack(tile, t);
+			if (IsRailWaypoint(tile) || IsRailDepot(tile)) {
+				if (!GetDepotWaypointReservation(tile)) {
+					SetDepotWaypointReservation(tile, true);
+					return true;
+				}
+			}
+			break;
+
+		case MP_ROAD:
+			if (IsLevelCrossing(tile) && !GetCrossingReservation(tile)) {
+				SetCrossingReservation(tile, true);
+				return true;
+			}
+			break;
+
+		case MP_STATION:
+			if (IsRailwayStation(tile) && !GetRailwayStationReservation(tile)) {
+				SetRailwayStationReservation(tile, true);
+				return true;
+			}
+			break;
+
+		case MP_TUNNELBRIDGE:
+			if (GetTunnelBridgeTransportType(tile) == TRANSPORT_RAIL && !GetRailTunnelBridgeReservation(tile)) {
+				SetTunnelBridgeReservation(tile, true);
+				return true;
+			}
+			break;
+
+		default:
+			break;
+	}
+	return false;
+}
+
+/**
+ * Lift the reservation of a specific track on a tile
+ * @param tile the tile
+ * @param t the track
+ */
+ void UnreserveRailTrack(TileIndex tile, Track t)
+{
+	assert((GetTileTrackStatus(tile, TRANSPORT_RAIL, 0) & TrackToTrackBits(t)) != 0);
+
+	if (_settings_client.gui.show_track_reservation) {
+		MarkTileDirtyByTile(tile);
+	}
+
+	switch (GetTileType(tile)) {
+		case MP_RAILWAY:
+			if (IsRailWaypoint(tile) || IsRailDepot(tile)) SetDepotWaypointReservation(tile, false);
+			if (IsPlainRailTile(tile)) UnreserveTrack(tile, t);
+			break;
+
+		case MP_ROAD:
+			if (IsLevelCrossing(tile)) SetCrossingReservation(tile, false);
+			break;
+
+		case MP_STATION:
+			if (IsRailwayStation(tile)) SetRailwayStationReservation(tile, false);
+			break;
+
+		case MP_TUNNELBRIDGE:
+			if (GetTunnelBridgeTransportType(tile) == TRANSPORT_RAIL) SetTunnelBridgeReservation(tile, false);
+			break;
+
+		default:
+			break;
+	}
+}
-- 
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