(svn r21519) -Codechange: Allow direct access to the GroundVehicleCache from a Vehicle.

src/vehicle.cpp

@@ -52,6 +52,7 @@
 #include "vehiclelist.h"
 #include "tunnel_map.h"
 #include "depot_map.h"
+#include "ground_vehicle.hpp"
 
 #include "table/strings.h"
 
@@ -2228,3 +2229,33 @@ bool CanVehicleUseStation(const Vehicle *v, const Station *st)
 
 	return CanVehicleUseStation(v->engine_type, st);
 }
+
+/**
+ * Access the ground vehicle cache of the vehicle.
+ * @pre The vehicle is a #GroundVehicle.
+ * @return #GroundVehicleCache of the vehicle.
+ */
+GroundVehicleCache *Vehicle::GetGroundVehicleCache()
+{
+	assert(this->IsGroundVehicle());
+	if (this->type == VEH_TRAIN) {
+		return &Train::From(this)->gcache;
+	} else {
+		return &RoadVehicle::From(this)->gcache;
+	}
+}
+
+/**
+ * Access the ground vehicle cache of the vehicle.
+ * @pre The vehicle is a #GroundVehicle.
+ * @return #GroundVehicleCache of the vehicle.
+ */
+const GroundVehicleCache *Vehicle::GetGroundVehicleCache() const
+{
+	assert(this->IsGroundVehicle());
+	if (this->type == VEH_TRAIN) {
+		return &Train::From(this)->gcache;
+	} else {
+		return &RoadVehicle::From(this)->gcache;
+	}
+}