(svn r16581) -Codechange: unify the access to Engine::lifelength.

src/ai/api/ai_engine.cpp

@@ -117,7 +117,7 @@
 	if (!IsValidEngine(engine_id)) return -1;
 	if (GetVehicleType(engine_id) == AIVehicle::VT_RAIL && IsWagon(engine_id)) return -1;
 
-	return ::Engine::Get(engine_id)->lifelength * DAYS_IN_LEAP_YEAR;
+	return ::Engine::Get(engine_id)->GetLifeLengthInDays();
 }
 
 /* static */ Money AIEngine::GetRunningCost(EngineID engine_id)

src/aircraft_cmd.cpp

@@ -334,7 +334,7 @@ CommandCost CmdBuildAircraft(TileIndex tile, DoCommandFlag flags, uint32 p1, uin
 
 		v->reliability = e->reliability;
 		v->reliability_spd_dec = e->reliability_spd_dec;
-		v->max_age = e->lifelength * DAYS_IN_LEAP_YEAR;
+		v->max_age = e->GetLifeLengthInDays();
 
 		_new_vehicle_id = v->index;
 

src/build_vehicle_gui.cpp

@@ -676,7 +676,7 @@ int DrawVehiclePurchaseInfo(int left, int right, int y, EngineID engine_number)
 	if (e->type != VEH_TRAIN || RailVehInfo(engine_number)->railveh_type != RAILVEH_WAGON) {
 		/* Design date - Life length */
 		SetDParam(0, ymd.year);
-		SetDParam(1, e->lifelength);
+		SetDParam(1, e->GetLifeLengthInDays() / DAYS_IN_LEAP_YEAR);
 		DrawString(left, right, y, STR_PURCHASE_INFO_DESIGNED_LIFE);
 		y += FONT_HEIGHT_NORMAL;
 

src/engine.cpp

@@ -315,6 +315,16 @@ uint Engine::GetDisplayMaxTractiveEffort() const
 	}
 }
 
+/**
+ * Returns the vehicle's life length in days.
+ * @return the life length
+ */
+Date Engine::GetLifeLengthInDays() const
+{
+	/* Assume leap years; this gives the player a bit more than the given amount of years, but never less. */
+	return this->lifelength * DAYS_IN_LEAP_YEAR;
+}
+
 /**
  * Initializes the EngineOverrideManager with the default engines.
  */

src/engine_base.h

@@ -59,6 +59,7 @@ struct Engine : EnginePool::PoolItem<&_engine_pool> {
 	uint GetPower() const;
 	uint GetDisplayWeight() const;
 	uint GetDisplayMaxTractiveEffort() const;
+	Date GetLifeLengthInDays() const;
 };
 
 struct EngineIDMapping {

src/roadveh_cmd.cpp

@@ -230,7 +230,7 @@ CommandCost CmdBuildRoadVeh(TileIndex tile, DoCommandFlag flags, uint32 p1, uint
 
 		v->reliability = e->reliability;
 		v->reliability_spd_dec = e->reliability_spd_dec;
-		v->max_age = e->lifelength * DAYS_IN_LEAP_YEAR;
+		v->max_age = e->GetLifeLengthInDays();
 		_new_vehicle_id = v->index;
 
 		v->name = NULL;

src/ship_cmd.cpp

@@ -799,7 +799,7 @@ CommandCost CmdBuildShip(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32
 
 		v->reliability = e->reliability;
 		v->reliability_spd_dec = e->reliability_spd_dec;
-		v->max_age = e->lifelength * DAYS_IN_LEAP_YEAR;
+		v->max_age = e->GetLifeLengthInDays();
 		_new_vehicle_id = v->index;
 
 		v->name = NULL;

src/train_cmd.cpp

@@ -869,7 +869,7 @@ CommandCost CmdBuildRailVehicle(TileIndex tile, DoCommandFlag flags, uint32 p1,
 
 		v->reliability = e->reliability;
 		v->reliability_spd_dec = e->reliability_spd_dec;
-		v->max_age = e->lifelength * DAYS_IN_LEAP_YEAR;
+		v->max_age = e->GetLifeLengthInDays();
 
 		v->name = NULL;
 		v->railtype = rvi->railtype;