(svn r23148) -Change: [NewGRF] Check the results of various callbacks for validness.

src/economy.cpp

@@ -1209,7 +1209,14 @@ static void LoadUnloadVehicle(Vehicle *front, int *cargo_left)
 
 		if (_settings_game.order.gradual_loading && HasBit(e->info.callback_mask, CBM_VEHICLE_LOAD_AMOUNT)) {
 			uint16 cb_load_amount = GetVehicleCallback(CBID_VEHICLE_LOAD_AMOUNT, 0, 0, v->engine_type, v);
-			if (cb_load_amount != CALLBACK_FAILED && GB(cb_load_amount, 0, 8) != 0) load_amount = GB(cb_load_amount, 0, 8);
+			if (cb_load_amount != CALLBACK_FAILED) {
+				if (e->GetGRF()->grf_version < 8) cb_load_amount = GB(cb_load_amount, 0, 8);
+				if (cb_load_amount >= 0x100) {
+					ErrorUnknownCallbackResult(e->GetGRFID(), CBID_VEHICLE_LOAD_AMOUNT, cb_load_amount);
+				} else if (cb_load_amount != 0) {
+					load_amount = cb_load_amount;
+				}
+			}
 		}
 
 		GoodsEntry *ge = &st->goods[v->cargo_type];

src/industry_cmd.cpp

@@ -1644,7 +1644,10 @@ static void DoCreateNewIndustry(Industry *i, TileIndex tile, IndustryType type,
 
 	if (HasBit(indspec->callback_mask, CBM_IND_DECIDE_COLOUR)) {
 		uint16 res = GetIndustryCallback(CBID_INDUSTRY_DECIDE_COLOUR, 0, 0, i, type, INVALID_TILE);
-		if (res != CALLBACK_FAILED) i->random_colour = GB(res, 0, 4);
+		if (res != CALLBACK_FAILED) {
+			if (GB(res, 4, 11) != 0) ErrorUnknownCallbackResult(indspec->grf_prop.grffile->grfid, CBID_INDUSTRY_DECIDE_COLOUR, res);
+			i->random_colour = GB(res, 0, 4);
+		}
 	}
 
 	if (HasBit(indspec->callback_mask, CBM_IND_INPUT_CARGO_TYPES)) {
@@ -1652,6 +1655,10 @@ static void DoCreateNewIndustry(Industry *i, TileIndex tile, IndustryType type,
 		for (uint j = 0; j < lengthof(i->accepts_cargo); j++) {
 			uint16 res = GetIndustryCallback(CBID_INDUSTRY_INPUT_CARGO_TYPES, j, 0, i, type, INVALID_TILE);
 			if (res == CALLBACK_FAILED || GB(res, 0, 8) == CT_INVALID) break;
+			if (indspec->grf_prop.grffile->grf_version >= 8 && res >= 0x100) {
+				ErrorUnknownCallbackResult(indspec->grf_prop.grffile->grfid, CBID_INDUSTRY_INPUT_CARGO_TYPES, res);
+				break;
+			}
 			i->accepts_cargo[j] = GetCargoTranslation(GB(res, 0, 8), indspec->grf_prop.grffile);
 		}
 	}
@@ -1661,6 +1668,10 @@ static void DoCreateNewIndustry(Industry *i, TileIndex tile, IndustryType type,
 		for (uint j = 0; j < lengthof(i->produced_cargo); j++) {
 			uint16 res = GetIndustryCallback(CBID_INDUSTRY_OUTPUT_CARGO_TYPES, j, 0, i, type, INVALID_TILE);
 			if (res == CALLBACK_FAILED || GB(res, 0, 8) == CT_INVALID) break;
+			if (indspec->grf_prop.grffile->grf_version >= 8 && res >= 0x100) {
+				ErrorUnknownCallbackResult(indspec->grf_prop.grffile->grfid, CBID_INDUSTRY_OUTPUT_CARGO_TYPES, res);
+				break;
+			}
 			i->produced_cargo[j] = GetCargoTranslation(GB(res, 0, 8), indspec->grf_prop.grffile);
 		}
 	}

src/newgrf_animation_base.h

@@ -45,7 +45,10 @@ struct AnimationBase {
 		uint8 animation_speed = spec->animation.speed;
 		if (HasBit(spec->callback_mask, Tbase::cbm_animation_speed)) {
 			uint16 callback = GetCallback(Tbase::cb_animation_speed, 0, 0, spec, obj, tile, extra_data);
-			if (callback != CALLBACK_FAILED) animation_speed = Clamp(callback & 0xFF, 0, 16);
+			if (callback != CALLBACK_FAILED) {
+				if (callback >= 0x100 && spec->grf_prop.grffile->grf_version >= 8) ErrorUnknownCallbackResult(spec->grf_prop.grffile->grfid, Tbase::cb_animation_speed, callback);
+				animation_speed = Clamp(callback & 0xFF, 0, 16);
+			}
 		}
 
 		/* An animation speed of 2 means the animation frame changes 4 ticks, and

src/object_cmd.cpp

@@ -93,7 +93,10 @@ void BuildObject(ObjectType type, TileIndex tile, CompanyID owner, Town *town, u
 
 	if (HasBit(spec->callback_mask, CBM_OBJ_COLOUR)) {
 		uint16 res = GetObjectCallback(CBID_OBJECT_COLOUR, o->colour, 0, spec, o, tile);
-		if (res != CALLBACK_FAILED) o->colour = GB(res, 0, 8);
+		if (res != CALLBACK_FAILED) {
+			if (res >= 0x100) ErrorUnknownCallbackResult(spec->grf_prop.grffile->grfid, CBID_OBJECT_COLOUR, res);
+			o->colour = GB(res, 0, 8);
+		}
 	}
 
 	assert(o->town != NULL);

src/roadveh_cmd.cpp

@@ -165,6 +165,7 @@ static uint GetRoadVehLength(const RoadVehicle *v)
 
 	uint16 veh_len = GetVehicleCallback(CBID_VEHICLE_LENGTH, 0, 0, v->engine_type, v);
 	if (veh_len != CALLBACK_FAILED) {
+		if (veh_len >= VEHICLE_LENGTH) ErrorUnknownCallbackResult(v->GetGRFID(), CBID_VEHICLE_LENGTH, veh_len);
 		length -= Clamp(veh_len, 0, VEHICLE_LENGTH - 1);
 	}
 

src/station_cmd.cpp

@@ -1252,7 +1252,13 @@ CommandCost CmdBuildRailStation(TileIndex tile_org, DoCommandFlag flags, uint32
 
 					/* As the station is not yet completely finished, the station does not yet exist. */
 					uint16 callback = GetStationCallback(CBID_STATION_TILE_LAYOUT, platinfo, 0, statspec, NULL, tile);
-					if (callback != CALLBACK_FAILED && callback < 8) SetStationGfx(tile, (callback & ~1) + axis);
+					if (callback != CALLBACK_FAILED) {
+						if (callback < 8) {
+							SetStationGfx(tile, (callback & ~1) + axis);
+						} else {
+							ErrorUnknownCallbackResult(statspec->grf_prop.grffile->grfid, CBID_STATION_TILE_LAYOUT, callback);
+						}
+					}
 
 					/* Trigger station animation -- after building? */
 					TriggerStationAnimation(st, tile, SAT_BUILT);

src/train_cmd.cpp

@@ -223,6 +223,10 @@ void Train::ConsistChanged(bool same_length)
 		uint16 veh_len = CALLBACK_FAILED;
 		if (HasBit(e_u->info.callback_mask, CBM_VEHICLE_LENGTH)) {
 			veh_len = GetVehicleCallback(CBID_VEHICLE_LENGTH, 0, 0, u->engine_type, u);
+
+			if (veh_len != CALLBACK_FAILED && veh_len >= VEHICLE_LENGTH) {
+				ErrorUnknownCallbackResult(e_u->GetGRFID(), CBID_VEHICLE_LENGTH, veh_len);
+			}
 		}
 		if (veh_len == CALLBACK_FAILED) veh_len = rvi_u->shorten_factor;
 		veh_len = VEHICLE_LENGTH - Clamp(veh_len, 0, VEHICLE_LENGTH - 1);

src/vehicle.cpp

@@ -835,6 +835,8 @@ static void RunVehicleDayProc()
 			if (callback != CALLBACK_FAILED) {
 				if (HasBit(callback, 0)) TriggerVehicle(v, VEHICLE_TRIGGER_CALLBACK_32); // Trigger vehicle trigger 10
 				if (HasBit(callback, 1)) v->colourmap = PAL_NONE;
+
+				if (callback & ~3) ErrorUnknownCallbackResult(v->GetGRFID(), CBID_VEHICLE_32DAY_CALLBACK, callback);
 			}
 		}
 
@@ -2175,6 +2177,8 @@ void Vehicle::UpdateVisualEffect(bool allow_power_change)
 		uint16 callback = GetVehicleCallback(CBID_VEHICLE_VISUAL_EFFECT, 0, 0, this->engine_type, this);
 
 		if (callback != CALLBACK_FAILED) {
+			if (callback >= 0x100 && e->GetGRF()->grf_version >= 8) ErrorUnknownCallbackResult(e->GetGRFID(), CBID_VEHICLE_VISUAL_EFFECT, callback);
+
 			callback = GB(callback, 0, 8);
 			/* Avoid accidentally setting 'visual_effect' to the default value
 			 * Since bit 6 (disable effects) is set anyways, we can safely erase some bits. */