Change: Increase object/station/roadstop class limit. (#12094)

The class limit is arbitrary and not stored in game state.

This change prevents all entities in classes after the 255th class from being dumped into the first class.

src/newgrf_object.h

@@ -45,10 +45,10 @@ static const uint8_t OBJECT_SIZE_1X1 = 0x11; ///< The value of a NewGRF's size p
 void ResetObjects();
 
 /** Class IDs for objects. */
-enum ObjectClassID : uint8_t {
+enum ObjectClassID : uint16_t {
 	OBJECT_CLASS_BEGIN = 0, ///< The lowest valid value
-	OBJECT_CLASS_MAX     = 0xFF, ///< Maximum number of classes.
+	OBJECT_CLASS_MAX = UINT16_MAX, ///< Maximum number of classes.
-	INVALID_OBJECT_CLASS = 0xFF, ///< Class for the less fortunate.
+	INVALID_OBJECT_CLASS = UINT16_MAX, ///< Class for the less fortunate.
 };
 /** Allow incrementing of ObjectClassID variables */
 DECLARE_POSTFIX_INCREMENT(ObjectClassID)

src/newgrf_roadstop.h

@@ -22,11 +22,11 @@
 /** The maximum amount of roadstops a single GRF is allowed to add */
 static const int NUM_ROADSTOPS_PER_GRF = UINT16_MAX - 1;
 
-enum RoadStopClassID : uint8_t {
+enum RoadStopClassID : uint16_t {
 	ROADSTOP_CLASS_BEGIN = 0, ///< The lowest valid value
 	ROADSTOP_CLASS_DFLT = 0, ///< Default road stop class.
 	ROADSTOP_CLASS_WAYP, ///< Waypoint class (unimplemented: this is reserved for future use with road waypoints).
-	ROADSTOP_CLASS_MAX = 255,    ///< Maximum number of classes.
+	ROADSTOP_CLASS_MAX = UINT16_MAX, ///< Maximum number of classes.
 };
 DECLARE_POSTFIX_INCREMENT(RoadStopClassID)
 

src/newgrf_station.h

@@ -80,11 +80,11 @@ struct StationResolverObject : public ResolverObject {
 	uint32_t GetDebugID() const override;
 };
 
-enum StationClassID : uint8_t {
+enum StationClassID : uint16_t {
 	STAT_CLASS_BEGIN = 0, ///< the lowest valid value
 	STAT_CLASS_DFLT = 0, ///< Default station class.
 	STAT_CLASS_WAYP, ///< Waypoint class.
-	STAT_CLASS_MAX = 255,    ///< Maximum number of classes.
+	STAT_CLASS_MAX = UINT16_MAX, ///< Maximum number of classes.
 };
 
 /** Allow incrementing of StationClassID variables */

src/road_cmd.h

@@ -14,7 +14,7 @@
 #include "road_type.h"
 #include "command_type.h"
 
-enum RoadStopClassID : uint8_t;
+enum RoadStopClassID : uint16_t;
 
 void DrawRoadDepotSprite(int x, int y, DiagDirection dir, RoadType rt);
 void UpdateNearestTownForRoadTiles(bool invalidate);

src/station_cmd.h

@@ -13,8 +13,8 @@
 #include "command_type.h"
 #include "station_type.h"
 
-enum StationClassID : uint8_t;
+enum StationClassID : uint16_t;
-enum RoadStopClassID : uint8_t;
+enum RoadStopClassID : uint16_t;
 
 extern Town *AirportGetNearestTown(const struct AirportSpec *as, Direction rotation, TileIndex tile, TileIterator &&it, uint &mindist);
 extern uint8_t GetAirportNoiseLevelForDistance(const struct AirportSpec *as, uint distance);

src/waypoint_cmd.h

@@ -13,7 +13,7 @@
 #include "command_type.h"
 #include "station_type.h"
 
-enum StationClassID : uint8_t;
+enum StationClassID : uint16_t;
 
 CommandCost CmdBuildRailWaypoint(DoCommandFlag flags, TileIndex start_tile, Axis axis, uint8_t width, uint8_t height, StationClassID spec_class, uint16_t spec_index, StationID station_to_join, bool adjacent);
 CommandCost CmdRemoveFromRailWaypoint(DoCommandFlag flags, TileIndex start, TileIndex end, bool keep_rail);