# HG changeset patch
# User Darkvater <darkvater@openttd.org>
# Date 2006-04-15 20:07:42
# Node ID ad5e3e34a211df684227170730a7996e810048f2
# Parent  5fbb283e07d5692579194b8129e901f52449d384

(svn r4435) - Fix: an assertion triggered when trying to remove a bridge with the remove-tool (r4348 surfaced this). In CmdRemoveRoad tiletype was not checked for ownership. Intorudce IsLevelCrossingTile() which checks if a tile is a crossing without knowing the type. Suggested by peter1138 and Tron.

diff --git a/road_cmd.c b/road_cmd.c
--- a/road_cmd.c
+++ b/road_cmd.c
@@ -47,11 +47,8 @@ static bool CheckAllowRemoveRoad(TileInd
 	// Only do the special processing for actual players.
 	if (_current_player >= MAX_PLAYERS) return true;
 
-	if (IsTileType(tile, MP_STREET) && IsLevelCrossing(tile)) {
-		owner = GetCrossingRoadOwner(tile);
-	} else {
-		owner = GetTileOwner(tile);
-	}
+	owner = IsLevelCrossingTile(tile) ? GetCrossingRoadOwner(tile) : GetTileOwner(tile);
+
 	// Only do the special processing if the road is owned
 	// by a town
 	if (owner != OWNER_TOWN) {
@@ -112,7 +109,7 @@ int32 CmdRemoveRoad(TileIndex tile, uint
 
 	if (!IsTileType(tile, MP_STREET) && !IsTileType(tile, MP_TUNNELBRIDGE)) return CMD_ERROR;
 
-	owner = IsLevelCrossing(tile) ? GetCrossingRoadOwner(tile) : GetTileOwner(tile);
+	owner = IsLevelCrossingTile(tile) ? GetCrossingRoadOwner(tile) : GetTileOwner(tile);
 
 	if (owner == OWNER_TOWN && _game_mode != GM_EDITOR) {
 		if (IsTileType(tile, MP_TUNNELBRIDGE)) { // index of town is not saved for bridge (no space)
diff --git a/road_map.h b/road_map.h
--- a/road_map.h
+++ b/road_map.h
@@ -26,6 +26,10 @@ static inline bool IsLevelCrossing(TileI
 	return GetRoadType(t) == ROAD_CROSSING;
 }
 
+static inline bool IsLevelCrossingTile(TileIndex t)
+{
+	return IsTileType(t, MP_STREET) && IsLevelCrossing(t);
+}
 
 static inline RoadBits GetRoadBits(TileIndex t)
 {
diff --git a/roadveh_cmd.c b/roadveh_cmd.c
--- a/roadveh_cmd.c
+++ b/roadveh_cmd.c
@@ -568,7 +568,7 @@ static void RoadVehCheckTrainCrash(Vehic
 
 	tile = v->tile;
 
-	if (!IsTileType(tile, MP_STREET) || !IsLevelCrossing(tile)) return;
+	if (!IsLevelCrossingTile(tile)) return;
 
 	if (VehicleFromPos(tile, v, EnumCheckRoadVehCrashTrain) != NULL)
 		RoadVehCrash(v);
diff --git a/train_cmd.c b/train_cmd.c
--- a/train_cmd.c
+++ b/train_cmd.c
@@ -92,7 +92,7 @@ void TrainPowerChanged(Vehicle* v)
 		if (IsBridgeTile(u->tile) && IsBridgeMiddle(u->tile) && DiagDirToAxis(DirToDiagDir(u->direction)) == GetBridgeAxis(u->tile)) {
 			if (!HasPowerOnRail(u->u.rail.railtype, GetRailTypeOnBridge(u->tile))) engine_has_power = false;
 			if (!HasPowerOnRail(v->u.rail.railtype, GetRailTypeOnBridge(u->tile))) wagon_has_power = false;
-		} else if (IsTileType(u->tile, MP_STREET) && IsLevelCrossing(u->tile)) {
+		} else if (IsLevelCrossingTile(u->tile)) {
 			if (!HasPowerOnRail(u->u.rail.railtype, GetRailTypeCrossing(u->tile)))	engine_has_power = false;
 			if (!HasPowerOnRail(v->u.rail.railtype, GetRailTypeCrossing(u->tile)))	wagon_has_power = false;
 		} else {
@@ -1529,8 +1529,7 @@ static void *TestTrainOnCrossing(Vehicle
 
 static void DisableTrainCrossing(TileIndex tile)
 {
-	if (IsTileType(tile, MP_STREET) &&
-			IsLevelCrossing(tile) &&
+	if (IsLevelCrossingTile(tile) &&
 			VehicleFromPos(tile, &tile, TestTrainOnCrossing) == NULL && // empty?
 			IsCrossingBarred(tile)) {
 		UnbarCrossing(tile);
@@ -3235,7 +3234,7 @@ static bool TrainCheckIfLineEnds(Vehicle
 		}
 		if ((ts &= (ts >> 16)) == 0) {
 			// make a rail/road crossing red
-			if (IsTileType(tile, MP_STREET) && IsLevelCrossing(tile)) {
+			if (IsLevelCrossingTile(tile)) {
 				if (!IsCrossingBarred(tile)) {
 					BarCrossing(tile);
 					SndPlayVehicleFx(SND_0E_LEVEL_CROSSING, v);