Codechange: replace some min/clamp constructs to ClampTo

src/economy.cpp

@@ -938,7 +938,7 @@ Money GetTransportedGoodsIncome(uint num_pieces, uint dist, uint16 transit_days,
 
 	/* Use callback to calculate cargo profit, if available */
 	if (HasBit(cs->callback_mask, CBM_CARGO_PROFIT_CALC)) {
-		uint32 var18 = std::min(dist, 0xFFFFu) | (std::min(num_pieces, 0xFFu) << 16) | (std::min<uint16>(transit_days, 0xFFu) << 24);
+		uint32 var18 = ClampTo<uint16_t>(dist) | (ClampTo<uint8_t>(num_pieces) << 16) | (ClampTo<uint8_t>(transit_days) << 24);
 		uint16 callback = GetCargoCallback(CBID_CARGO_PROFIT_CALC, 0, var18, cs);
 		if (callback != CALLBACK_FAILED) {
 			int result = GB(callback, 0, 14);
@@ -1126,7 +1126,7 @@ static void TriggerIndustryProduction(Industry *i)
 			if (cargo_waiting == 0) continue;
 
 			for (uint ci_out = 0; ci_out < lengthof(i->produced_cargo_waiting); ci_out++) {
-				i->produced_cargo_waiting[ci_out] = std::min(i->produced_cargo_waiting[ci_out] + (cargo_waiting * indspec->input_cargo_multiplier[ci_in][ci_out] / 256), 0xFFFFu);
+				i->produced_cargo_waiting[ci_out] = ClampTo<uint16_t>(i->produced_cargo_waiting[ci_out] + (cargo_waiting * indspec->input_cargo_multiplier[ci_in][ci_out] / 256));
 			}
 
 			i->incoming_cargo_waiting[ci_in] = 0;
@@ -1728,8 +1728,8 @@ static void LoadUnloadVehicle(Vehicle *front)
 		}
 
 		/* if last speed is 0, we treat that as if no vehicle has ever visited the station. */
-		ge->last_speed = std::min(t, 255);
-		ge->last_age = std::min(TimerGameCalendar::year - front->build_year, 255);
+		ge->last_speed = ClampTo<uint8_t>(t);
+		ge->last_age = ClampTo<uint8_t>(TimerGameCalendar::year - front->build_year);
 
 		assert(v->cargo_cap >= v->cargo.StoredCount());
 		/* Capacity available for loading more cargo. */

src/highscore.cpp

@@ -132,7 +132,7 @@ void SaveToHighScore()
 		for (i = 0; i < SP_SAVED_HIGHSCORE_END; i++) {
 			for (hs = _highscore_table[i]; hs != endof(_highscore_table[i]); hs++) {
 				/* First character is a command character, so strlen will fail on that */
-				byte length = std::min(sizeof(hs->company), StrEmpty(hs->company) ? 0 : strlen(&hs->company[1]) + 1);
+				byte length = ClampTo<byte>(std::min(sizeof(hs->company), StrEmpty(hs->company) ? 0 : strlen(&hs->company[1]) + 1));
 
 				if (fwrite(&length, sizeof(length), 1, fp)       != 1 || // write away string length
 						fwrite(hs->company, length, 1, fp)           >  1 || // Yes... could be 0 bytes too

src/industry_cmd.cpp

@@ -532,7 +532,7 @@ static bool TransportIndustryGoods(TileIndex tile)
 	bool moved_cargo = false;
 
 	for (uint j = 0; j < lengthof(i->produced_cargo_waiting); j++) {
-		uint cw = std::min<uint>(i->produced_cargo_waiting[j], 255u);
+		uint cw = ClampTo<uint8_t>(i->produced_cargo_waiting[j]);
 		if (cw > indspec->minimal_cargo && i->produced_cargo[j] != CT_INVALID) {
 			i->produced_cargo_waiting[j] -= cw;
 
@@ -1141,7 +1141,7 @@ static void ChopLumberMillTrees(Industry *i)
 
 	TileIndex tile = i->location.tile;
 	if (CircularTileSearch(&tile, 40, SearchLumberMillTrees, nullptr)) { // 40x40 tiles  to search.
-		i->produced_cargo_waiting[0] = std::min(0xffff, i->produced_cargo_waiting[0] + 45); // Found a tree, add according value to waiting cargo.
+		i->produced_cargo_waiting[0] = ClampTo<uint16_t>(i->produced_cargo_waiting[0] + 45); // Found a tree, add according value to waiting cargo.
 	}
 }
 
@@ -1173,7 +1173,7 @@ static void ProduceIndustryGoods(Industry *i)
 
 		IndustryBehaviour indbehav = indsp->behaviour;
 		for (size_t j = 0; j < lengthof(i->produced_cargo_waiting); j++) {
-			i->produced_cargo_waiting[j] = std::min(0xffff, i->produced_cargo_waiting[j] + i->production_rate[j]);
+			i->produced_cargo_waiting[j] = ClampTo<uint16_t>(i->produced_cargo_waiting[j] + i->production_rate[j]);
 		}
 
 		if ((indbehav & INDUSTRYBEH_PLANT_FIELDS) != 0) {
@@ -1784,7 +1784,7 @@ static void DoCreateNewIndustry(Industry *i, TileIndex tile, IndustryType type,
 	/* Randomize inital production if non-original economy is used and there are no production related callbacks. */
 	if (!indspec->UsesOriginalEconomy()) {
 		for (size_t ci = 0; ci < lengthof(i->production_rate); ci++) {
-			i->production_rate[ci] = std::min((RandomRange(256) + 128) * i->production_rate[ci] >> 8, 255u);
+			i->production_rate[ci] = ClampTo<byte>((RandomRange(256) + 128) * i->production_rate[ci] >> 8);
 		}
 	}
 
@@ -2422,7 +2422,7 @@ static void UpdateIndustryStatistics(Industry *i)
 			byte pct = 0;
 			if (i->this_month_production[j] != 0) {
 				i->last_prod_year = TimerGameCalendar::year;
-				pct = std::min(i->this_month_transported[j] * 256 / i->this_month_production[j], 255);
+				pct = ClampTo<byte>(i->this_month_transported[j] * 256 / i->this_month_production[j]);
 			}
 			i->last_month_pct_transported[j] = pct;
 
@@ -2446,7 +2446,7 @@ void Industry::RecomputeProductionMultipliers()
 
 	/* Rates are rounded up, so e.g. oilrig always produces some passengers */
 	for (size_t i = 0; i < lengthof(this->production_rate); i++) {
-		this->production_rate[i] = std::min(CeilDiv(indspec->production_rate[i] * this->prod_level, PRODLEVEL_DEFAULT), 0xFFu);
+		this->production_rate[i] = ClampTo<byte>(CeilDiv(indspec->production_rate[i] * this->prod_level, PRODLEVEL_DEFAULT));
 	}
 }
 

src/industry_gui.cpp

@@ -1052,7 +1052,7 @@ class IndustryViewWindow : public Window
 								if (i->production_rate[line - IL_RATE1] >= 255) return;
 								/* a zero production industry is unlikely to give anything but zero, so push it a little bit */
 								int new_prod = i->production_rate[line - IL_RATE1] == 0 ? 1 : i->production_rate[line - IL_RATE1] * 2;
-								i->production_rate[line - IL_RATE1] = std::min<uint>(new_prod, 255);
+								i->production_rate[line - IL_RATE1] = ClampTo<byte>(new_prod);
 							}
 							break;
 

src/newgrf_airport.cpp

@@ -212,7 +212,7 @@ void AirportOverrideManager::SetEntitySpec(AirportSpec *as)
 		case 0x7C: return (this->st->airport.psa != nullptr) ? this->st->airport.psa->GetValue(parameter) : 0;
 
 		case 0xF0: return this->st->facilities;
-		case 0xFA: return Clamp(this->st->build_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535);
+		case 0xFA: return ClampTo<uint16_t>(this->st->build_date - DAYS_TILL_ORIGINAL_BASE_YEAR);
 	}
 
 	return this->st->GetNewGRFVariable(this->ro, variable, parameter, available);

src/newgrf_commons.cpp

@@ -437,7 +437,7 @@ uint32 GetNearbyTileInformation(TileIndex tile, bool grf_version8)
 	/* Return 0 if the tile is a land tile */
 	byte terrain_type = (HasTileWaterClass(tile) ? (GetWaterClass(tile) + 1) & 3 : 0) << 5 | GetTerrainType(tile) << 2 | (tile_type == MP_WATER ? 1 : 0) << 1;
 	if (grf_version8) z /= TILE_HEIGHT;
-	return tile_type << 24 | Clamp(z, 0, 0xFF) << 16 | terrain_type << 8 | tileh;
+	return tile_type << 24 | ClampTo<uint8_t>(z) << 16 | terrain_type << 8 | tileh;
 }
 
 /**

src/newgrf_engine.cpp

@@ -528,7 +528,7 @@ static uint32 VehicleGetVariable(Vehicle *v, const VehicleScopeResolver *object,
 					airporttype = st->airport.GetSpec()->ttd_airport_type;
 				}
 
-				return (Clamp(altitude, 0, 0xFF) << 8) | airporttype;
+				return (ClampTo<uint8_t>(altitude) << 8) | airporttype;
 			}
 
 		case 0x45: { // Curvature info
@@ -766,8 +766,8 @@ static uint32 VehicleGetVariable(Vehicle *v, const VehicleScopeResolver *object,
 			}
 			return (variable - 0x80) == 0x10 ? ticks : GB(ticks, 8, 8);
 		}
-		case 0x12: return Clamp(v->date_of_last_service - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 0xFFFF);
-		case 0x13: return GB(Clamp(v->date_of_last_service - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 0xFFFF), 8, 8);
+		case 0x12: return ClampTo<uint16_t>(v->date_of_last_service - DAYS_TILL_ORIGINAL_BASE_YEAR);
+		case 0x13: return GB(ClampTo<uint16_t>(v->date_of_last_service - DAYS_TILL_ORIGINAL_BASE_YEAR), 8, 8);
 		case 0x14: return v->GetServiceInterval();
 		case 0x15: return GB(v->GetServiceInterval(), 8, 8);
 		case 0x16: return v->last_station_visited;
@@ -823,7 +823,7 @@ static uint32 VehicleGetVariable(Vehicle *v, const VehicleScopeResolver *object,
 		case 0x3C: return ClampTo<uint16_t>(v->cargo.StoredCount());
 		case 0x3D: return GB(ClampTo<uint16_t>(v->cargo.StoredCount()), 8, 8);
 		case 0x3E: return v->cargo.Source();
-		case 0x3F: return ClampU(v->cargo.DaysInTransit(), 0, 0xFF);
+		case 0x3F: return ClampTo<uint8_t>(v->cargo.DaysInTransit());
 		case 0x40: return ClampTo<uint16_t>(v->age);
 		case 0x41: return GB(ClampTo<uint16_t>(v->age), 8, 8);
 		case 0x42: return ClampTo<uint16_t>(v->max_age);
@@ -973,8 +973,8 @@ static uint32 VehicleGetVariable(Vehicle *v, const VehicleScopeResolver *object,
 			case 0x48: return Engine::Get(this->self_type)->flags; // Vehicle Type Info
 			case 0x49: return TimerGameCalendar::year; // 'Long' format build year
 			case 0x4B: return TimerGameCalendar::date; // Long date of last service
-			case 0x92: return Clamp(TimerGameCalendar::date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 0xFFFF); // Date of last service
-			case 0x93: return GB(Clamp(TimerGameCalendar::date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 0xFFFF), 8, 8);
+			case 0x92: return ClampTo<uint16_t>(TimerGameCalendar::date - DAYS_TILL_ORIGINAL_BASE_YEAR); // Date of last service
+			case 0x93: return GB(ClampTo<uint16_t>(TimerGameCalendar::date - DAYS_TILL_ORIGINAL_BASE_YEAR), 8, 8);
 			case 0xC4: return Clamp(TimerGameCalendar::year, ORIGINAL_BASE_YEAR, ORIGINAL_MAX_YEAR) - ORIGINAL_BASE_YEAR; // Build year
 			case 0xC6: return Engine::Get(this->self_type)->grf_prop.local_id;
 			case 0xC7: return GB(Engine::Get(this->self_type)->grf_prop.local_id, 8, 8);

src/newgrf_house.cpp

@@ -152,13 +152,12 @@ void DecreaseBuildingCount(Town *t, HouseID house_id)
 
 static uint32 GetNumHouses(HouseID house_id, const Town *town)
 {
-	uint8 map_id_count, town_id_count, map_class_count, town_class_count;
 	HouseClassID class_id = HouseSpec::Get(house_id)->class_id;
 
-	map_id_count     = ClampU(_building_counts.id_count[house_id], 0, 255);
-	map_class_count  = ClampU(_building_counts.class_count[class_id], 0, 255);
-	town_id_count    = ClampU(town->cache.building_counts.id_count[house_id], 0, 255);
-	town_class_count = ClampU(town->cache.building_counts.class_count[class_id], 0, 255);
+	uint8_t map_id_count     = ClampTo<uint8_t>(_building_counts.id_count[house_id]);
+	uint8_t map_class_count  = ClampTo<uint8_t>(_building_counts.class_count[class_id]);
+	uint8_t town_id_count    = ClampTo<uint8_t>(town->cache.building_counts.id_count[house_id]);
+	uint8_t town_class_count = ClampTo<uint8_t>(town->cache.building_counts.class_count[class_id]);
 
 	return map_class_count << 24 | town_class_count << 16 | map_id_count << 8 | town_id_count;
 }

src/newgrf_industries.cpp

@@ -141,7 +141,7 @@ static uint32 GetCountAndDistanceOfClosestInstance(byte param_setID, byte layout
 		/* If the filter is 0, it could be because none was specified as well as being really a 0.
 		 * In either case, just do the regular var67 */
 		closest_dist = GetClosestIndustry(current->location.tile, ind_index, current);
-		count = std::min<uint>(Industry::GetIndustryTypeCount(ind_index), UINT8_MAX); // clamp to 8 bit
+		count = ClampTo<byte>(Industry::GetIndustryTypeCount(ind_index));
 	} else {
 		/* Count only those who match the same industry type and layout filter
 		 * Unfortunately, we have to do it manually */
@@ -181,16 +181,16 @@ static uint32 GetCountAndDistanceOfClosestInstance(byte param_setID, byte layout
 			case 0x88: return GetTownRadiusGroup(this->industry->town, this->tile);
 
 			/* Manhattan distance of the closest town */
-			case 0x89: return std::min(DistanceManhattan(this->industry->town->xy, this->tile), 255u);
+			case 0x89: return ClampTo<uint8_t>(DistanceManhattan(this->industry->town->xy, this->tile));
 
 			/* Lowest height of the tile */
-			case 0x8A: return Clamp(GetTileZ(this->tile) * (this->ro.grffile->grf_version >= 8 ? 1 : TILE_HEIGHT), 0, 0xFF);
+			case 0x8A: return ClampTo<uint8_t>(GetTileZ(this->tile) * (this->ro.grffile->grf_version >= 8 ? 1 : TILE_HEIGHT));
 
 			/* Distance to the nearest water/land tile */
 			case 0x8B: return GetClosestWaterDistance(this->tile, (GetIndustrySpec(this->industry->type)->behaviour & INDUSTRYBEH_BUILT_ONWATER) == 0);
 
 			/* Square of Euclidian distance from town */
-			case 0x8D: return std::min(DistanceSquare(this->industry->town->xy, this->tile), 65535u);
+			case 0x8D: return ClampTo<uint16_t>(DistanceSquare(this->industry->town->xy, this->tile));
 
 			/* 32 random bits */
 			case 0x8F: return this->random_bits;
@@ -214,9 +214,9 @@ static uint32 GetCountAndDistanceOfClosestInstance(byte param_setID, byte layout
 			if (HasBit(callback, CBM_IND_PRODUCTION_CARGO_ARRIVAL) || HasBit(callback, CBM_IND_PRODUCTION_256_TICKS)) {
 				if ((indspec->behaviour & INDUSTRYBEH_PROD_MULTI_HNDLING) != 0) {
 					if (this->industry->prod_level == 0) return 0;
-					return std::min<uint16>(this->industry->incoming_cargo_waiting[variable - 0x40] / this->industry->prod_level, 0xFFFFu);
+					return ClampTo<uint16>(this->industry->incoming_cargo_waiting[variable - 0x40] / this->industry->prod_level);
 				} else {
-					return std::min<uint16>(this->industry->incoming_cargo_waiting[variable - 0x40], 0xFFFFu);
+					return ClampTo<uint16>(this->industry->incoming_cargo_waiting[variable - 0x40]);
 				}
 			} else {
 				return 0;
@@ -285,7 +285,7 @@ static uint32 GetCountAndDistanceOfClosestInstance(byte param_setID, byte layout
 		case 0x65: {
 			if (this->tile == INVALID_TILE) break;
 			TileIndex tile = GetNearbyTile(parameter, this->tile, true);
-			return GetTownRadiusGroup(this->industry->town, tile) << 16 | std::min(DistanceManhattan(tile, this->industry->town->xy), 0xFFFFu);
+			return GetTownRadiusGroup(this->industry->town, tile) << 16 | ClampTo<uint16_t>(DistanceManhattan(tile, this->industry->town->xy));
 		}
 		/* Get square of Euclidian distance of closest town */
 		case 0x66: {
@@ -396,16 +396,16 @@ static uint32 GetCountAndDistanceOfClosestInstance(byte param_setID, byte layout
 		case 0xA6: return indspec->grf_prop.local_id;
 		case 0xA7: return this->industry->founder;
 		case 0xA8: return this->industry->random_colour;
-		case 0xA9: return Clamp(this->industry->last_prod_year - ORIGINAL_BASE_YEAR, 0, 255);
+		case 0xA9: return ClampTo<uint8_t>(this->industry->last_prod_year - ORIGINAL_BASE_YEAR);
 		case 0xAA: return this->industry->counter;
 		case 0xAB: return GB(this->industry->counter, 8, 8);
 		case 0xAC: return this->industry->was_cargo_delivered;
 
-		case 0xB0: return Clamp(this->industry->construction_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535); // Date when built since 1920 (in days)
+		case 0xB0: return ClampTo<uint16_t>(this->industry->construction_date - DAYS_TILL_ORIGINAL_BASE_YEAR); // Date when built since 1920 (in days)
 		case 0xB3: return this->industry->construction_type; // Construction type
 		case 0xB4: {
 			TimerGameCalendar::Date *latest = std::max_element(this->industry->last_cargo_accepted_at, endof(this->industry->last_cargo_accepted_at));
-			return Clamp((*latest) - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535); // Date last cargo accepted since 1920 (in days)
+			return ClampTo<uint16_t>((*latest) - DAYS_TILL_ORIGINAL_BASE_YEAR); // Date last cargo accepted since 1920 (in days)
 		}
 	}
 
@@ -643,22 +643,22 @@ void IndustryProductionCallback(Industry *ind, int reason)
 		if (group->version < 2) {
 			/* Callback parameters map directly to industry cargo slot indices */
 			for (uint i = 0; i < group->num_input; i++) {
-				ind->incoming_cargo_waiting[i] = Clamp(ind->incoming_cargo_waiting[i] - DerefIndProd(group->subtract_input[i], deref) * multiplier, 0, 0xFFFF);
+				ind->incoming_cargo_waiting[i] = ClampTo<uint16_t>(ind->incoming_cargo_waiting[i] - DerefIndProd(group->subtract_input[i], deref) * multiplier);
 			}
 			for (uint i = 0; i < group->num_output; i++) {
-				ind->produced_cargo_waiting[i] = Clamp(ind->produced_cargo_waiting[i] + std::max(DerefIndProd(group->add_output[i], deref), 0) * multiplier, 0, 0xFFFF);
+				ind->produced_cargo_waiting[i] = ClampTo<uint16_t>(ind->produced_cargo_waiting[i] + std::max(DerefIndProd(group->add_output[i], deref), 0) * multiplier);
 			}
 		} else {
 			/* Callback receives list of cargos to apply for, which need to have their cargo slots in industry looked up */
 			for (uint i = 0; i < group->num_input; i++) {
 				int cargo_index = ind->GetCargoAcceptedIndex(group->cargo_input[i]);
 				if (cargo_index < 0) continue;
-				ind->incoming_cargo_waiting[cargo_index] = Clamp(ind->incoming_cargo_waiting[cargo_index] - DerefIndProd(group->subtract_input[i], deref) * multiplier, 0, 0xFFFF);
+				ind->incoming_cargo_waiting[cargo_index] = ClampTo<uint16_t>(ind->incoming_cargo_waiting[cargo_index] - DerefIndProd(group->subtract_input[i], deref) * multiplier);
 			}
 			for (uint i = 0; i < group->num_output; i++) {
 				int cargo_index = ind->GetCargoProducedIndex(group->cargo_output[i]);
 				if (cargo_index < 0) continue;
-				ind->produced_cargo_waiting[cargo_index] = Clamp(ind->produced_cargo_waiting[cargo_index] + std::max(DerefIndProd(group->add_output[i], deref), 0) * multiplier, 0, 0xFFFF);
+				ind->produced_cargo_waiting[cargo_index] = ClampTo<uint16_t>(ind->produced_cargo_waiting[cargo_index] + std::max(DerefIndProd(group->add_output[i], deref), 0) * multiplier);
 			}
 		}
 

src/newgrf_object.cpp

@@ -249,7 +249,7 @@ static uint32 GetCountAndDistanceOfClosestInstance(byte local_id, uint32 grfid,
 	/* If the object type is invalid, there is none and the closest is far away. */
 	if (idx >= NUM_OBJECTS) return 0 | 0xFFFF;
 
-	return Object::GetTypeCount(idx) << 16 | std::min(GetClosestObject(tile, idx, current), 0xFFFFu);
+	return Object::GetTypeCount(idx) << 16 | ClampTo<uint16_t>(GetClosestObject(tile, idx, current));
 }
 
 /** Used by the resolver to get values for feature 0F deterministic spritegroups. */
@@ -324,7 +324,7 @@ static uint32 GetCountAndDistanceOfClosestInstance(byte local_id, uint32 grfid,
 		case 0x44: return GetTileOwner(this->tile);
 
 		/* Get town zone and Manhattan distance of closest town */
-		case 0x45: return GetTownRadiusGroup(t, this->tile) << 16 | std::min(DistanceManhattan(this->tile, t->xy), 0xFFFFu);
+		case 0x45: return GetTownRadiusGroup(t, this->tile) << 16 | ClampTo<uint16_t>(DistanceManhattan(this->tile, t->xy));
 
 		/* Get square of Euclidian distance of closest town */
 		case 0x46: return DistanceSquare(this->tile, t->xy);

src/newgrf_roadstop.cpp

@@ -105,7 +105,7 @@ uint32 RoadStopScopeResolver::GetVariable(byte variable, uint32 parameter, bool
 		case 0x45: {
 			if (this->tile == INVALID_TILE) return HZB_TOWN_EDGE << 16;
 			const Town *t = (this->st == nullptr) ? ClosestTownFromTile(this->tile, UINT_MAX) : this->st->town;
-			return t != nullptr ? (GetTownRadiusGroup(t, this->tile) << 16 | std::min(DistanceManhattan(this->tile, t->xy), 0xFFFFu)) : HZB_TOWN_EDGE << 16;
+			return t != nullptr ? (GetTownRadiusGroup(t, this->tile) << 16 | ClampTo<uint16_t>(DistanceManhattan(this->tile, t->xy))) : HZB_TOWN_EDGE << 16;
 		}
 
 		/* Get square of Euclidian distance of closest town */
@@ -176,7 +176,7 @@ uint32 RoadStopScopeResolver::GetVariable(byte variable, uint32 parameter, bool
 
 		case 0xF0: return this->st == nullptr ? 0 : this->st->facilities; // facilities
 
-		case 0xFA: return Clamp((this->st == nullptr ? TimerGameCalendar::date : this->st->build_date) - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535); // build date
+		case 0xFA: return ClampTo<uint16_t>((this->st == nullptr ? TimerGameCalendar::date : this->st->build_date) - DAYS_TILL_ORIGINAL_BASE_YEAR); // build date
 	}
 
 	if (this->st != nullptr) return this->st->GetNewGRFVariable(this->ro, variable, parameter, available);

src/newgrf_station.cpp

@@ -294,7 +294,7 @@ TownScopeResolver *StationResolverObject::GetTown()
 				}
 				break;
 
-			case 0xFA: return Clamp(TimerGameCalendar::date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535); // Build date, clamped to a 16 bit value
+			case 0xFA: return ClampTo<uint16_t>(TimerGameCalendar::date - DAYS_TILL_ORIGINAL_BASE_YEAR); // Build date, clamped to a 16 bit value
 		}
 
 		*available = false;
@@ -384,7 +384,7 @@ TownScopeResolver *StationResolverObject::GetTown()
 		case 0x84: return this->st->string_id;
 		case 0x86: return 0;
 		case 0xF0: return this->st->facilities;
-		case 0xFA: return Clamp(this->st->build_date - DAYS_TILL_ORIGINAL_BASE_YEAR, 0, 65535);
+		case 0xFA: return ClampTo<uint16_t>(this->st->build_date - DAYS_TILL_ORIGINAL_BASE_YEAR);
 	}
 
 	return this->st->GetNewGRFVariable(this->ro, variable, parameter, available);