(svn r21284) -Codechange: Rename CheckSavegameVersion() to IsSavegameVersionBefore().

20 files changed, 148 insertions, 159 deletions

diff --git a/src/saveload/afterload.cpp b/src/saveload/afterload.cpp
index b3e446eb4..982c3254a 100644
--- a/src/saveload/afterload.cpp
+++ b/src/saveload/afterload.cpp
@@ -439,14 +439,14 @@ bool AfterLoadGame()
 
 	TileIndex map_size = MapSize();
 
-	if (CheckSavegameVersion(98)) GamelogOldver();
+	if (IsSavegameVersionBefore(98)) GamelogOldver();
 
 	GamelogTestRevision();
 	GamelogTestMode();
 
-	if (CheckSavegameVersion(98)) GamelogGRFAddList(_grfconfig);
+	if (IsSavegameVersionBefore(98)) GamelogGRFAddList(_grfconfig);
 
-	if (CheckSavegameVersion(119)) {
+	if (IsSavegameVersionBefore(119)) {
 		_pause_mode = (_pause_mode == 2) ? PM_PAUSED_NORMAL : PM_UNPAUSED;
 	} else if (_network_dedicated && (_pause_mode & PM_PAUSED_ERROR) != 0) {
 		DEBUG(net, 0, "The loading savegame was paused due to an error state.");
@@ -466,7 +466,7 @@ bool AfterLoadGame()
 	}
 
 	/* in very old versions, size of train stations was stored differently */
-	if (CheckSavegameVersion(2)) {
+	if (IsSavegameVersionBefore(2)) {
 		Station *st;
 		FOR_ALL_STATIONS(st) {
 			if (st->train_station.tile != 0 && st->train_station.h == 0) {
@@ -505,7 +505,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(84)) {
+	if (IsSavegameVersionBefore(84)) {
 		Company *c;
 		FOR_ALL_COMPANIES(c) {
 			c->name = CopyFromOldName(c->name_1);
@@ -531,7 +531,7 @@ bool AfterLoadGame()
 	/* From this point the old names array is cleared. */
 	ResetOldNames();
 
-	if (CheckSavegameVersion(106)) {
+	if (IsSavegameVersionBefore(106)) {
 		/* no station is determined by 'tile == INVALID_TILE' now (instead of '0') */
 		Station *st;
 		FOR_ALL_STATIONS(st) {
@@ -543,7 +543,7 @@ bool AfterLoadGame()
 		/* the same applies to Company::location_of_HQ */
 		Company *c;
 		FOR_ALL_COMPANIES(c) {
-			if (c->location_of_HQ == 0 || (CheckSavegameVersion(4) && c->location_of_HQ == 0xFFFF)) {
+			if (c->location_of_HQ == 0 || (IsSavegameVersionBefore(4) && c->location_of_HQ == 0xFFFF)) {
 				c->location_of_HQ = INVALID_TILE;
 			}
 		}
@@ -576,14 +576,14 @@ bool AfterLoadGame()
 	}
 
 	/* The value of _date_fract got divided, so make sure that old games are converted correctly. */
-	if (IsSavegameVersionBefore(11, 1) || (CheckSavegameVersion(147) && _date_fract > DAY_TICKS)) _date_fract /= 885;
+	if (IsSavegameVersionBefore(11, 1) || (IsSavegameVersionBefore(147) && _date_fract > DAY_TICKS)) _date_fract /= 885;
 
 	/* Update current year
 	 * must be done before loading sprites as some newgrfs check it */
 	SetDate(_date, _date_fract);
 
 	/* Force dynamic engines off when loading older savegames */
-	if (CheckSavegameVersion(95)) _settings_game.vehicle.dynamic_engines = 0;
+	if (IsSavegameVersionBefore(95)) _settings_game.vehicle.dynamic_engines = 0;
 
 	/* Load the sprites */
 	GfxLoadSprites();
@@ -610,7 +610,7 @@ bool AfterLoadGame()
 	/* Oilrig was moved from id 15 to 9. We have to do this conversion
 	 * here as AfterLoadVehicles can check it indirectly via the newgrf
 	 * code. */
-	if (CheckSavegameVersion(139)) {
+	if (IsSavegameVersionBefore(139)) {
 		Station *st;
 		FOR_ALL_STATIONS(st) {
 			if (st->airport.tile != INVALID_TILE && st->airport.type == 15) {
@@ -642,7 +642,7 @@ bool AfterLoadGame()
 	 * This problem appears in savegame version 21 too, see r3455. But after loading the
 	 * savegame and saving again, the buggy map array could be converted to new savegame
 	 * version. It didn't show up before r12070. */
-	if (CheckSavegameVersion(87)) UpdateVoidTiles();
+	if (IsSavegameVersionBefore(87)) UpdateVoidTiles();
 
 	/* If Load Scenario / New (Scenario) Game is used,
 	 *  a company does not exist yet. So create one here.
@@ -659,7 +659,7 @@ bool AfterLoadGame()
 		cp->current_station = cp->front->last_station_visited;
 	}
 
-	if (CheckSavegameVersion(72)) {
+	if (IsSavegameVersionBefore(72)) {
 		/* Locks in very old savegames had OWNER_WATER as owner */
 		for (TileIndex t = 0; t < MapSize(); t++) {
 			switch (GetTileType(t)) {
@@ -730,7 +730,7 @@ bool AfterLoadGame()
 				switch (GetStationType(t)) {
 					case STATION_TRUCK:
 					case STATION_BUS:
-						if (CheckSavegameVersion(6)) {
+						if (IsSavegameVersionBefore(6)) {
 							/* From this version on there can be multiple road stops of the
 							 * same type per station. Convert the existing stops to the new
 							 * internal data structure. */
@@ -801,20 +801,20 @@ bool AfterLoadGame()
 	}
 
 	/* Force the freeform edges to false for old savegames. */
-	if (CheckSavegameVersion(111)) {
+	if (IsSavegameVersionBefore(111)) {
 		_settings_game.construction.freeform_edges = false;
 	}
 
 	/* From version 9.0, we update the max passengers of a town (was sometimes negative
 	 *  before that. */
-	if (CheckSavegameVersion(9)) {
+	if (IsSavegameVersionBefore(9)) {
 		Town *t;
 		FOR_ALL_TOWNS(t) UpdateTownMaxPass(t);
 	}
 
 	/* From version 16.0, we included autorenew on engines, which are now saved, but
 	 *  of course, we do need to initialize them for older savegames. */
-	if (CheckSavegameVersion(16)) {
+	if (IsSavegameVersionBefore(16)) {
 		Company *c;
 		FOR_ALL_COMPANIES(c) {
 			c->engine_renew_list            = NULL;
@@ -835,7 +835,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(48)) {
+	if (IsSavegameVersionBefore(48)) {
 		for (TileIndex t = 0; t < map_size; t++) {
 			switch (GetTileType(t)) {
 				case MP_RAILWAY:
@@ -863,9 +863,9 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(61)) {
+	if (IsSavegameVersionBefore(61)) {
 		/* Added the RoadType */
-		bool old_bridge = CheckSavegameVersion(42);
+		bool old_bridge = IsSavegameVersionBefore(42);
 		for (TileIndex t = 0; t < map_size; t++) {
 			switch (GetTileType(t)) {
 				case MP_ROAD:
@@ -902,9 +902,9 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(114)) {
-		bool fix_roadtypes = !CheckSavegameVersion(61);
-		bool old_bridge = CheckSavegameVersion(42);
+	if (IsSavegameVersionBefore(114)) {
+		bool fix_roadtypes = !IsSavegameVersionBefore(61);
+		bool old_bridge = IsSavegameVersionBefore(42);
 
 		for (TileIndex t = 0; t < map_size; t++) {
 			switch (GetTileType(t)) {
@@ -969,7 +969,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(42)) {
+	if (IsSavegameVersionBefore(42)) {
 		Vehicle *v;
 
 		for (TileIndex t = 0; t < map_size; t++) {
@@ -1051,7 +1051,7 @@ bool AfterLoadGame()
 	}
 
 	/* Elrails got added in rev 24 */
-	if (CheckSavegameVersion(24)) {
+	if (IsSavegameVersionBefore(24)) {
 		RailType min_rail = RAILTYPE_ELECTRIC;
 
 		Train *v;
@@ -1106,7 +1106,7 @@ bool AfterLoadGame()
 		FOR_ALL_COMPANIES(c) c->settings.renew_keep_length = false;
 	}
 
-	if (CheckSavegameVersion(123)) {
+	if (IsSavegameVersionBefore(123)) {
 		/* Waypoints became subclasses of stations ... */
 		MoveWaypointsToBaseStations();
 		/* ... and buoys were moved to waypoints. */
@@ -1115,7 +1115,7 @@ bool AfterLoadGame()
 
 	/* From version 15, we moved a semaphore bit from bit 2 to bit 3 in m4, making
 	 *  room for PBS. Now in version 21 move it back :P. */
-	if (CheckSavegameVersion(21) && !CheckSavegameVersion(15)) {
+	if (IsSavegameVersionBefore(21) && !IsSavegameVersionBefore(15)) {
 		for (TileIndex t = 0; t < map_size; t++) {
 			switch (GetTileType(t)) {
 				case MP_RAILWAY:
@@ -1145,14 +1145,14 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(25)) {
+	if (IsSavegameVersionBefore(25)) {
 		RoadVehicle *rv;
 		FOR_ALL_ROADVEHICLES(rv) {
 			rv->vehstatus &= ~0x40;
 		}
 	}
 
-	if (CheckSavegameVersion(26)) {
+	if (IsSavegameVersionBefore(26)) {
 		Station *st;
 		FOR_ALL_STATIONS(st) {
 			st->last_vehicle_type = VEH_INVALID;
@@ -1161,7 +1161,7 @@ bool AfterLoadGame()
 
 	YapfNotifyTrackLayoutChange(INVALID_TILE, INVALID_TRACK);
 
-	if (CheckSavegameVersion(34)) {
+	if (IsSavegameVersionBefore(34)) {
 		Company *c;
 		FOR_ALL_COMPANIES(c) ResetCompanyLivery(c);
 	}
@@ -1172,11 +1172,11 @@ bool AfterLoadGame()
 		c->avail_roadtypes = GetCompanyRoadtypes(c->index);
 	}
 
-	if (!CheckSavegameVersion(27)) AfterLoadStations();
+	if (!IsSavegameVersionBefore(27)) AfterLoadStations();
 
 	/* Time starts at 0 instead of 1920.
 	 * Account for this in older games by adding an offset */
-	if (CheckSavegameVersion(31)) {
+	if (IsSavegameVersionBefore(31)) {
 		Station *st;
 		Waypoint *wp;
 		Engine *e;
@@ -1201,7 +1201,7 @@ bool AfterLoadGame()
 	/* From 32 on we save the industry who made the farmland.
 	 *  To give this prettyness to old savegames, we remove all farmfields and
 	 *  plant new ones. */
-	if (CheckSavegameVersion(32)) {
+	if (IsSavegameVersionBefore(32)) {
 		Industry *i;
 
 		for (TileIndex t = 0; t < map_size; t++) {
@@ -1225,7 +1225,7 @@ bool AfterLoadGame()
 	}
 
 	/* Setting no refit flags to all orders in savegames from before refit in orders were added */
-	if (CheckSavegameVersion(36)) {
+	if (IsSavegameVersionBefore(36)) {
 		Order *order;
 		Vehicle *v;
 
@@ -1240,14 +1240,14 @@ bool AfterLoadGame()
 
 	/* from version 38 we have optional elrails, since we cannot know the
 	 * preference of a user, let elrails enabled; it can be disabled manually */
-	if (CheckSavegameVersion(38)) _settings_game.vehicle.disable_elrails = false;
+	if (IsSavegameVersionBefore(38)) _settings_game.vehicle.disable_elrails = false;
 	/* do the same as when elrails were enabled/disabled manually just now */
 	SettingsDisableElrail(_settings_game.vehicle.disable_elrails);
 	InitializeRailGUI();
 
 	/* From version 53, the map array was changed for house tiles to allow
 	 * space for newhouses grf features. A new byte, m7, was also added. */
-	if (CheckSavegameVersion(53)) {
+	if (IsSavegameVersionBefore(53)) {
 		for (TileIndex t = 0; t < map_size; t++) {
 			if (IsTileType(t, MP_HOUSE)) {
 				if (GB(_m[t].m3, 6, 2) != TOWN_HOUSE_COMPLETED) {
@@ -1284,7 +1284,7 @@ bool AfterLoadGame()
 	/* Check and update house and town values */
 	UpdateHousesAndTowns();
 
-	if (CheckSavegameVersion(43)) {
+	if (IsSavegameVersionBefore(43)) {
 		for (TileIndex t = 0; t < map_size; t++) {
 			if (IsTileType(t, MP_INDUSTRY)) {
 				switch (GetIndustryGfx(t)) {
@@ -1311,7 +1311,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(45)) {
+	if (IsSavegameVersionBefore(45)) {
 		Vehicle *v;
 		/* Originally just the fact that some cargo had been paid for was
 		 * stored to stop people cheating and cashing in several times. This
@@ -1325,14 +1325,14 @@ bool AfterLoadGame()
 
 	/* Buoys do now store the owner of the previous water tile, which can never
 	 * be OWNER_NONE. So replace OWNER_NONE with OWNER_WATER. */
-	if (CheckSavegameVersion(46)) {
+	if (IsSavegameVersionBefore(46)) {
 		Waypoint *wp;
 		FOR_ALL_WAYPOINTS(wp) {
 			if ((wp->facilities & FACIL_DOCK) != 0 && IsTileOwner(wp->xy, OWNER_NONE) && TileHeight(wp->xy) == 0) SetTileOwner(wp->xy, OWNER_WATER);
 		}
 	}
 
-	if (CheckSavegameVersion(50)) {
+	if (IsSavegameVersionBefore(50)) {
 		Aircraft *v;
 		/* Aircraft units changed from 8 mph to 1 km-ish/h */
 		FOR_ALL_AIRCRAFT(v) {
@@ -1345,9 +1345,9 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(49)) FOR_ALL_COMPANIES(c) c->face = ConvertFromOldCompanyManagerFace(c->face);
+	if (IsSavegameVersionBefore(49)) FOR_ALL_COMPANIES(c) c->face = ConvertFromOldCompanyManagerFace(c->face);
 
-	if (CheckSavegameVersion(52)) {
+	if (IsSavegameVersionBefore(52)) {
 		for (TileIndex t = 0; t < map_size; t++) {
 			if (IsStatueTile(t)) {
 				_m[t].m2 = CalcClosestTownFromTile(t)->index;
@@ -1358,7 +1358,7 @@ bool AfterLoadGame()
 	/* A setting containing the proportion of towns that grow twice as
 	 * fast was added in version 54. From version 56 this is now saved in the
 	 * town as cities can be built specifically in the scenario editor. */
-	if (CheckSavegameVersion(56)) {
+	if (IsSavegameVersionBefore(56)) {
 		Town *t;
 
 		FOR_ALL_TOWNS(t) {
@@ -1368,7 +1368,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(57)) {
+	if (IsSavegameVersionBefore(57)) {
 		Vehicle *v;
 		/* Added a FIFO queue of vehicles loading at stations */
 		FOR_ALL_VEHICLES(v) {
@@ -1382,7 +1382,7 @@ bool AfterLoadGame()
 				ClrBit(v->vehicle_flags, VF_LOADING_FINISHED);
 			}
 		}
-	} else if (CheckSavegameVersion(59)) {
+	} else if (IsSavegameVersionBefore(59)) {
 		/* For some reason non-loading vehicles could be in the station's loading vehicle list */
 
 		Station *st;
@@ -1396,7 +1396,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(58)) {
+	if (IsSavegameVersionBefore(58)) {
 		/* Setting difficulty number_industries other than zero get bumped to +1
 		 * since a new option (very low at position1) has been added */
 		if (_settings_game.difficulty.number_industries > 0) {
@@ -1407,7 +1407,7 @@ bool AfterLoadGame()
 		_settings_game.difficulty.number_towns++;
 	}
 
-	if (CheckSavegameVersion(64)) {
+	if (IsSavegameVersionBefore(64)) {
 		/* copy the signal type/variant and move signal states bits */
 		for (TileIndex t = 0; t < map_size; t++) {
 			if (IsTileType(t, MP_RAILWAY) && HasSignals(t)) {
@@ -1419,7 +1419,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(69)) {
+	if (IsSavegameVersionBefore(69)) {
 		/* In some old savegames a bit was cleared when it should not be cleared */
 		RoadVehicle *rv;
 		FOR_ALL_ROADVEHICLES(rv) {
@@ -1429,7 +1429,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(70)) {
+	if (IsSavegameVersionBefore(70)) {
 		/* Added variables to support newindustries */
 		Industry *i;
 		FOR_ALL_INDUSTRIES(i) i->founder = OWNER_NONE;
@@ -1437,7 +1437,7 @@ bool AfterLoadGame()
 
 	/* From version 82, old style canals (above sealevel (0), WATER owner) are no longer supported.
 	    Replace the owner for those by OWNER_NONE. */
-	if (CheckSavegameVersion(82)) {
+	if (IsSavegameVersionBefore(82)) {
 		for (TileIndex t = 0; t < map_size; t++) {
 			if (IsTileType(t, MP_WATER) &&
 					GetWaterTileType(t) == WATER_TILE_CLEAR &&
@@ -1454,7 +1454,7 @@ bool AfterLoadGame()
 	 * someone can remove canals owned by somebody else and it prevents
 	 * making floods using the removal of ship depots.
 	 */
-	if (CheckSavegameVersion(83)) {
+	if (IsSavegameVersionBefore(83)) {
 		for (TileIndex t = 0; t < map_size; t++) {
 			if (IsTileType(t, MP_WATER) && IsShipDepot(t)) {
 				_m[t].m4 = (TileHeight(t) == 0) ? OWNER_WATER : OWNER_NONE;
@@ -1462,7 +1462,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(74)) {
+	if (IsSavegameVersionBefore(74)) {
 		Station *st;
 		FOR_ALL_STATIONS(st) {
 			for (CargoID c = 0; c < NUM_CARGO; c++) {
@@ -1472,7 +1472,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(78)) {
+	if (IsSavegameVersionBefore(78)) {
 		Industry *i;
 		uint j;
 		FOR_ALL_INDUSTRIES(i) {
@@ -1490,7 +1490,7 @@ bool AfterLoadGame()
 	 * grassy trees were always drawn fully grassy. Furthermore, trees on rough
 	 * land used to have zero density, now they have full density. Therefore,
 	 * make all grassy/rough land trees have a density of 3. */
-	if (CheckSavegameVersion(81)) {
+	if (IsSavegameVersionBefore(81)) {
 		for (TileIndex t = 0; t < map_size; t++) {
 			if (GetTileType(t) == MP_TREES) {
 				TreeGround groundType = (TreeGround)GB(_m[t].m2, 4, 2);
@@ -1500,7 +1500,7 @@ bool AfterLoadGame()
 	}
 
 
-	if (CheckSavegameVersion(93)) {
+	if (IsSavegameVersionBefore(93)) {
 		/* Rework of orders. */
 		Order *order;
 		FOR_ALL_ORDERS(order) order->ConvertFromOldSavegame();
@@ -1517,7 +1517,7 @@ bool AfterLoadGame()
 				FOR_VEHICLE_ORDERS(v, order) order->SetNonStopType(ONSF_NO_STOP_AT_INTERMEDIATE_STATIONS);
 			}
 		}
-	} else if (CheckSavegameVersion(94)) {
+	} else if (IsSavegameVersionBefore(94)) {
 		/* Unload and transfer are now mutual exclusive. */
 		Order *order;
 		FOR_ALL_ORDERS(order) {
@@ -1536,7 +1536,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(84)) {
+	if (IsSavegameVersionBefore(84)) {
 		/* Set all share owners to INVALID_COMPANY for
 		 * 1) all inactive companies
 		 *     (when inactive companies were stored in the savegame - TTD, TTDP and some
@@ -1553,7 +1553,7 @@ bool AfterLoadGame()
 	}
 
 	/* The water class was moved/unified. */
-	if (CheckSavegameVersion(146)) {
+	if (IsSavegameVersionBefore(146)) {
 		for (TileIndex t = 0; t < map_size; t++) {
 			switch (GetTileType(t)) {
 				case MP_STATION:
@@ -1587,7 +1587,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(86)) {
+	if (IsSavegameVersionBefore(86)) {
 		for (TileIndex t = 0; t < map_size; t++) {
 			/* Move river flag and update canals to use water class */
 			if (IsTileType(t, MP_WATER)) {
@@ -1618,7 +1618,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(87)) {
+	if (IsSavegameVersionBefore(87)) {
 		for (TileIndex t = 0; t < map_size; t++) {
 			/* skip oil rigs at borders! */
 			if ((IsTileType(t, MP_WATER) || IsBuoyTile(t)) &&
@@ -1656,13 +1656,13 @@ bool AfterLoadGame()
 		}
 
 		/* Convert old PF settings to new */
-		if (_settings_game.pf.yapf.rail_use_yapf || CheckSavegameVersion(28)) {
+		if (_settings_game.pf.yapf.rail_use_yapf || IsSavegameVersionBefore(28)) {
 			_settings_game.pf.pathfinder_for_trains = VPF_YAPF;
 		} else {
 			_settings_game.pf.pathfinder_for_trains = VPF_NPF;
 		}
 
-		if (_settings_game.pf.yapf.road_use_yapf || CheckSavegameVersion(28)) {
+		if (_settings_game.pf.yapf.road_use_yapf || IsSavegameVersionBefore(28)) {
 			_settings_game.pf.pathfinder_for_roadvehs = VPF_YAPF;
 		} else {
 			_settings_game.pf.pathfinder_for_roadvehs = VPF_NPF;
@@ -1675,7 +1675,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(88)) {
+	if (IsSavegameVersionBefore(88)) {
 		/* Profits are now with 8 bit fract */
 		Vehicle *v;
 		FOR_ALL_VEHICLES(v) {
@@ -1685,7 +1685,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(91)) {
+	if (IsSavegameVersionBefore(91)) {
 		/* Increase HouseAnimationFrame from 5 to 7 bits */
 		for (TileIndex t = 0; t < map_size; t++) {
 			if (IsTileType(t, MP_HOUSE) && GetHouseType(t) >= NEW_HOUSE_OFFSET) {
@@ -1695,7 +1695,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(62)) {
+	if (IsSavegameVersionBefore(62)) {
 		/* Remove all trams from savegames without tram support.
 		 * There would be trams without tram track under causing crashes sooner or later. */
 		RoadVehicle *v;
@@ -1709,7 +1709,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(99)) {
+	if (IsSavegameVersionBefore(99)) {
 		for (TileIndex t = 0; t < map_size; t++) {
 			/* Set newly introduced WaterClass of industry tiles */
 			if (IsTileType(t, MP_STATION) && IsOilRig(t)) {
@@ -1733,7 +1733,7 @@ bool AfterLoadGame()
 	/* Move the signal variant back up one bit for PBS. We don't convert the old PBS
 	 * format here, as an old layout wouldn't work properly anyway. To be safe, we
 	 * clear any possible PBS reservations as well. */
-	if (CheckSavegameVersion(100)) {
+	if (IsSavegameVersionBefore(100)) {
 		for (TileIndex t = 0; t < map_size; t++) {
 			switch (GetTileType(t)) {
 				case MP_RAILWAY:
@@ -1771,21 +1771,21 @@ bool AfterLoadGame()
 	}
 
 	/* Reserve all tracks trains are currently on. */
-	if (CheckSavegameVersion(101)) {
+	if (IsSavegameVersionBefore(101)) {
 		const Train *t;
 		FOR_ALL_TRAINS(t) {
 			if (t->First() == t) t->ReserveTrackUnderConsist();
 		}
 	}
 
-	if (CheckSavegameVersion(102)) {
+	if (IsSavegameVersionBefore(102)) {
 		for (TileIndex t = 0; t < map_size; t++) {
 			/* Now all crossings should be in correct state */
 			if (IsLevelCrossingTile(t)) UpdateLevelCrossing(t, false);
 		}
 	}
 
-	if (CheckSavegameVersion(103)) {
+	if (IsSavegameVersionBefore(103)) {
 		/* Non-town-owned roads now store the closest town */
 		UpdateNearestTownForRoadTiles(false);
 
@@ -1803,7 +1803,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(104)) {
+	if (IsSavegameVersionBefore(104)) {
 		Aircraft *a;
 		FOR_ALL_AIRCRAFT(a) {
 			/* Set engine_type of shadow and rotor */
@@ -1830,7 +1830,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(112)) {
+	if (IsSavegameVersionBefore(112)) {
 		for (TileIndex t = 0; t < map_size; t++) {
 			/* Check for HQ bit being set, instead of using map accessor,
 			 * since we've already changed it code-wise */
@@ -1842,7 +1842,7 @@ bool AfterLoadGame()
 			}
 		}
 	}
-	if (CheckSavegameVersion(144)) {
+	if (IsSavegameVersionBefore(144)) {
 		for (TileIndex t = 0; t < map_size; t++) {
 			if (!IsTileType(t, MP_OBJECT)) continue;
 
@@ -1857,7 +1857,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(147) && Object::GetNumItems() == 0) {
+	if (IsSavegameVersionBefore(147) && Object::GetNumItems() == 0) {
 		/* Make real objects for object tiles. */
 		for (TileIndex t = 0; t < map_size; t++) {
 			if (!IsTileType(t, MP_OBJECT)) continue;
@@ -1895,7 +1895,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(113)) {
+	if (IsSavegameVersionBefore(113)) {
 		/* allow_town_roads is added, set it if town_layout wasn't TL_NO_ROADS */
 		if (_settings_game.economy.town_layout == 0) { // was TL_NO_ROADS
 			_settings_game.economy.allow_town_roads = false;
@@ -1925,7 +1925,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(114)) {
+	if (IsSavegameVersionBefore(114)) {
 		/* There could be (deleted) stations with invalid owner, set owner to OWNER NONE.
 		 * The conversion affects oil rigs and buoys too, but it doesn't matter as
 		 * they have st->owner == OWNER_NONE already. */
@@ -1936,14 +1936,14 @@ bool AfterLoadGame()
 	}
 
 	/* Trains could now stop in a specific location. */
-	if (CheckSavegameVersion(117)) {
+	if (IsSavegameVersionBefore(117)) {
 		Order *o;
 		FOR_ALL_ORDERS(o) {
 			if (o->IsType(OT_GOTO_STATION)) o->SetStopLocation(OSL_PLATFORM_FAR_END);
 		}
 	}
 
-	if (CheckSavegameVersion(120)) {
+	if (IsSavegameVersionBefore(120)) {
 		extern VehicleDefaultSettings _old_vds;
 		Company *c;
 		FOR_ALL_COMPANIES(c) {
@@ -1951,7 +1951,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(121)) {
+	if (IsSavegameVersionBefore(121)) {
 		/* Delete small ufos heading for non-existing vehicles */
 		Vehicle *v;
 		FOR_ALL_DISASTERVEHICLES(v) {
@@ -1979,7 +1979,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(122)) {
+	if (IsSavegameVersionBefore(122)) {
 		/* Animated tiles would sometimes not be actually animated or
 		 * in case of old savegames duplicate. */
 
@@ -2003,7 +2003,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(124)) {
+	if (IsSavegameVersionBefore(124)) {
 		/* The train station tile area was added */
 		Waypoint *wp;
 		FOR_ALL_WAYPOINTS(wp) {
@@ -2019,7 +2019,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(125)) {
+	if (IsSavegameVersionBefore(125)) {
 		/* Convert old subsidies */
 		Subsidy *s;
 		FOR_ALL_SUBSIDIES(s) {
@@ -2079,7 +2079,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(126)) {
+	if (IsSavegameVersionBefore(126)) {
 		/* Recompute inflation based on old unround loan limit
 		 * Note: Max loan is 500000. With an inflation of 4% across 170 years
 		 *       that results in a max loan of about 0.7 * 2^31.
@@ -2097,12 +2097,12 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(127)) {
+	if (IsSavegameVersionBefore(127)) {
 		Station *st;
 		FOR_ALL_STATIONS(st) UpdateStationAcceptance(st, false);
 	}
 
-	if (CheckSavegameVersion(128)) {
+	if (IsSavegameVersionBefore(128)) {
 		const Depot *d;
 		FOR_ALL_DEPOTS(d) {
 			_m[d->xy].m2 = d->index;
@@ -2112,7 +2112,7 @@ bool AfterLoadGame()
 
 	/* The behaviour of force_proceed has been changed. Now
 	 * it counts signals instead of some random time out. */
-	if (CheckSavegameVersion(131)) {
+	if (IsSavegameVersionBefore(131)) {
 		Train *t;
 		FOR_ALL_TRAINS(t) {
 			if (t->force_proceed != TFP_NONE) {
@@ -2123,7 +2123,7 @@ bool AfterLoadGame()
 
 	/* The bits for the tree ground and tree density have
 	 * been swapped (m2 bits 7..6 and 5..4. */
-	if (CheckSavegameVersion(135)) {
+	if (IsSavegameVersionBefore(135)) {
 		for (TileIndex t = 0; t < map_size; t++) {
 			if (IsTileType(t, MP_CLEAR)) {
 				if (GetRawClearGround(t) == CLEAR_SNOW) {
@@ -2143,7 +2143,7 @@ bool AfterLoadGame()
 	}
 
 	/* Wait counter and load/unload ticks got split. */
-	if (CheckSavegameVersion(136)) {
+	if (IsSavegameVersionBefore(136)) {
 		Aircraft *a;
 		FOR_ALL_AIRCRAFT(a) {
 			a->turn_counter = a->current_order.IsType(OT_LOADING) ? 0 : a->load_unload_ticks;
@@ -2156,7 +2156,7 @@ bool AfterLoadGame()
 	}
 
 	/* Airport tile animation uses animation frame instead of other graphics id */
-	if (CheckSavegameVersion(137)) {
+	if (IsSavegameVersionBefore(137)) {
 		struct AirportTileConversion {
 			byte old_start;
 			byte num_frames;
@@ -2192,7 +2192,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(139)) {
+	if (IsSavegameVersionBefore(139)) {
 		Train *t;
 		FOR_ALL_TRAINS(t) {
 			/* Copy old GOINGUP / GOINGDOWN flags. */
@@ -2206,7 +2206,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(140)) {
+	if (IsSavegameVersionBefore(140)) {
 		Station *st;
 		FOR_ALL_STATIONS(st) {
 			if (st->airport.tile != INVALID_TILE) {
@@ -2216,7 +2216,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(141)) {
+	if (IsSavegameVersionBefore(141)) {
 		for (TileIndex t = 0; t < map_size; t++) {
 			/* Reset tropic zone for VOID tiles, they shall not have any. */
 			if (IsTileType(t, MP_VOID)) SetTropicZone(t, TROPICZONE_NORMAL);
@@ -2231,7 +2231,7 @@ bool AfterLoadGame()
 		FOR_ALL_DEPOTS(d) MakeDefaultName(d);
 	}
 
-	if (CheckSavegameVersion(142)) {
+	if (IsSavegameVersionBefore(142)) {
 		Depot *d;
 		FOR_ALL_DEPOTS(d) d->build_date = _date;
 	}
@@ -2241,7 +2241,7 @@ bool AfterLoadGame()
 	 * another airport in the same station so we don't allow that anymore.
 	 * For old savegames with such aircraft we just throw them in the air and
 	 * treat the aircraft like they were flying already. */
-	if (CheckSavegameVersion(146)) {
+	if (IsSavegameVersionBefore(146)) {
 		Aircraft *v;
 		FOR_ALL_AIRCRAFT(v) {
 			if (!v->IsNormalAircraft()) continue;
@@ -2257,7 +2257,7 @@ bool AfterLoadGame()
 	}
 
 	/* Move the animation frame to the same location (m7) for all objects. */
-	if (CheckSavegameVersion(147)) {
+	if (IsSavegameVersionBefore(147)) {
 		for (TileIndex t = 0; t < map_size; t++) {
 			switch (GetTileType(t)) {
 				case MP_HOUSE:
@@ -2289,7 +2289,7 @@ bool AfterLoadGame()
 	}
 
 	/* Add (random) colour to all objects. */
-	if (CheckSavegameVersion(148)) {
+	if (IsSavegameVersionBefore(148)) {
 		Object *o;
 		FOR_ALL_OBJECTS(o) {
 			Owner owner = GetTileOwner(o->location.tile);
@@ -2297,7 +2297,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(149)) {
+	if (IsSavegameVersionBefore(149)) {
 		for (TileIndex t = 0; t < map_size; t++) {
 			if (!IsTileType(t, MP_STATION)) continue;
 			if (!IsBuoy(t) && !IsOilRig(t) && !(IsDock(t) && GetTileSlope(t, NULL) == SLOPE_FLAT)) {
@@ -2319,7 +2319,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(152)) {
+	if (IsSavegameVersionBefore(152)) {
 		_industry_builder.Reset(); // Initialize industry build data.
 
 		/* The moment vehicles go from hidden to visible changed. This means
@@ -2377,7 +2377,7 @@ bool AfterLoadGame()
 		}
 	}
 
-	if (CheckSavegameVersion(153)) {
+	if (IsSavegameVersionBefore(153)) {
 		RoadVehicle *rv;
 		FOR_ALL_ROADVEHICLES(rv) {
 			bool loading = rv->current_order.IsType(OT_LOADING) || rv->current_order.IsType(OT_LEAVESTATION);
diff --git a/src/saveload/animated_tile_sl.cpp b/src/saveload/animated_tile_sl.cpp
index bd4623207..2ccd42cb5 100644
--- a/src/saveload/animated_tile_sl.cpp
+++ b/src/saveload/animated_tile_sl.cpp
@@ -34,9 +34,9 @@ static void Save_ANIT()
 static void Load_ANIT()
 {
 	/* Before version 80 we did NOT have a variable length animated tile table */
-	if (CheckSavegameVersion(80)) {
+	if (IsSavegameVersionBefore(80)) {
 		/* In pre version 6, we has 16bit per tile, now we have 32bit per tile, convert it ;) */
-		SlArray(_animated_tile_list, 256, CheckSavegameVersion(6) ? (SLE_FILE_U16 | SLE_VAR_U32) : SLE_UINT32);
+		SlArray(_animated_tile_list, 256, IsSavegameVersionBefore(6) ? (SLE_FILE_U16 | SLE_VAR_U32) : SLE_UINT32);
 
 		for (_animated_tile_count = 0; _animated_tile_count < 256; _animated_tile_count++) {
 			if (_animated_tile_list[_animated_tile_count] == 0) break;
diff --git a/src/saveload/autoreplace_sl.cpp b/src/saveload/autoreplace_sl.cpp
index 6f370b0a1..96fff7728 100644
--- a/src/saveload/autoreplace_sl.cpp
+++ b/src/saveload/autoreplace_sl.cpp
@@ -42,9 +42,9 @@ static void Load_ERNW()
 		SlObject(er, _engine_renew_desc);
 
 		/* Advanced vehicle lists, ungrouped vehicles got added */
-		if (CheckSavegameVersion(60)) {
+		if (IsSavegameVersionBefore(60)) {
 			er->group_id = ALL_GROUP;
-		} else if (CheckSavegameVersion(71)) {
+		} else if (IsSavegameVersionBefore(71)) {
 			if (er->group_id == DEFAULT_GROUP) er->group_id = ALL_GROUP;
 		}
 	}
diff --git a/src/saveload/cargopacket_sl.cpp b/src/saveload/cargopacket_sl.cpp
index de3e35fbd..eafe5346b 100644
--- a/src/saveload/cargopacket_sl.cpp
+++ b/src/saveload/cargopacket_sl.cpp
@@ -17,7 +17,7 @@
 
 /* static */ void CargoPacket::AfterLoad()
 {
-	if (CheckSavegameVersion(44)) {
+	if (IsSavegameVersionBefore(44)) {
 		Vehicle *v;
 		/* If we remove a station while cargo from it is still enroute, payment calculation will assume
 		 * 0, 0 to be the source of the cargo, resulting in very high payments usually. v->source_xy
@@ -54,7 +54,7 @@
 		}
 	}
 
-	if (CheckSavegameVersion(120)) {
+	if (IsSavegameVersionBefore(120)) {
 		/* CargoPacket's source should be either INVALID_STATION or a valid station */
 		CargoPacket *cp;
 		FOR_ALL_CARGOPACKETS(cp) {
@@ -62,7 +62,7 @@
 		}
 	}
 
-	if (!CheckSavegameVersion(68)) {
+	if (!IsSavegameVersionBefore(68)) {
 		/* Only since version 68 we have cargo packets. Savegames from before used
 		 * 'new CargoPacket' + cargolist.Append so their caches are already
 		 * correct and do not need rebuilding. */
diff --git a/src/saveload/company_sl.cpp b/src/saveload/company_sl.cpp
index b238ad818..6f2195ba0 100644
--- a/src/saveload/company_sl.cpp
+++ b/src/saveload/company_sl.cpp
@@ -266,7 +266,7 @@ static void SaveLoad_PLYR_common(Company *c, CompanyProperties *cprops)
 	}
 
 	/* Keep backwards compatible for savegames, so load the old AI block */
-	if (CheckSavegameVersion(107) && cprops->is_ai) {
+	if (IsSavegameVersionBefore(107) && cprops->is_ai) {
 		CompanyOldAI old_ai;
 		char nothing;
 
@@ -285,7 +285,7 @@ static void SaveLoad_PLYR_common(Company *c, CompanyProperties *cprops)
 	}
 
 	/* Write each livery entry. */
-	int num_liveries = CheckSavegameVersion(63) ? LS_END - 4 : (CheckSavegameVersion(85) ? LS_END - 2: LS_END);
+	int num_liveries = IsSavegameVersionBefore(63) ? LS_END - 4 : (IsSavegameVersionBefore(85) ? LS_END - 2: LS_END);
 	if (c != NULL) {
 		for (i = 0; i < num_liveries; i++) {
 			SlObject(&c->livery[i], _company_livery_desc);
@@ -345,7 +345,7 @@ static void Check_PLYR()
 		SaveLoad_PLYR_common(NULL, cprops);
 
 		/* We do not load old custom names */
-		if (CheckSavegameVersion(84))
+		if (IsSavegameVersionBefore(84))
 		{
 			if (GB(cprops->name_1, 11, 5) == 15) {
 				cprops->name_1 = STR_GAME_SAVELOAD_NOT_AVAILABLE;
diff --git a/src/saveload/depot_sl.cpp b/src/saveload/depot_sl.cpp
index 9b8fd224a..0d62d74cd 100644
--- a/src/saveload/depot_sl.cpp
+++ b/src/saveload/depot_sl.cpp
@@ -47,7 +47,7 @@ static void Load_DEPT()
 		SlObject(depot, _depot_desc);
 
 		/* Set the town 'pointer' so we can restore it later. */
-		if (CheckSavegameVersion(141)) depot->town = (Town *)(size_t)_town_index;
+		if (IsSavegameVersionBefore(141)) depot->town = (Town *)(size_t)_town_index;
 	}
 }
 
@@ -57,7 +57,7 @@ static void Ptrs_DEPT()
 
 	FOR_ALL_DEPOTS(depot) {
 		SlObject(depot, _depot_desc);
-		if (CheckSavegameVersion(141)) depot->town = Town::Get((size_t)depot->town);
+		if (IsSavegameVersionBefore(141)) depot->town = Town::Get((size_t)depot->town);
 	}
 }
 
diff --git a/src/saveload/economy_sl.cpp b/src/saveload/economy_sl.cpp
index cff98c5a5..9bdad61a9 100644
--- a/src/saveload/economy_sl.cpp
+++ b/src/saveload/economy_sl.cpp
@@ -19,7 +19,7 @@
 static void Load_PRIC()
 {
 	/* Old games store 49 base prices, very old games store them as int32 */
-	int vt = CheckSavegameVersion(65) ? SLE_FILE_I32 : SLE_FILE_I64;
+	int vt = IsSavegameVersionBefore(65) ? SLE_FILE_I32 : SLE_FILE_I64;
 	SlArray(NULL, 49, vt | SLE_VAR_NULL);
 	SlArray(NULL, 49, SLE_FILE_U16 | SLE_VAR_NULL);
 }
@@ -27,8 +27,8 @@ static void Load_PRIC()
 /** Cargo payment rates in pre 126 savegames */
 static void Load_CAPR()
 {
-	uint num_cargo = CheckSavegameVersion(55) ? 12 : NUM_CARGO;
-	int vt = CheckSavegameVersion(65) ? SLE_FILE_I32 : SLE_FILE_I64;
+	uint num_cargo = IsSavegameVersionBefore(55) ? 12 : NUM_CARGO;
+	int vt = IsSavegameVersionBefore(65) ? SLE_FILE_I32 : SLE_FILE_I64;
 	SlArray(NULL, num_cargo, vt | SLE_VAR_NULL);
 	SlArray(NULL, num_cargo, SLE_FILE_U16 | SLE_VAR_NULL);
 }
@@ -59,7 +59,7 @@ static void Save_ECMY()
 static void Load_ECMY()
 {
 	SlObject(&_economy, _economy_desc);
-	StartupIndustryDailyChanges(CheckSavegameVersion(102));  // old savegames will need to be initialized
+	StartupIndustryDailyChanges(IsSavegameVersionBefore(102));  // old savegames will need to be initialized
 }
 
 static const SaveLoad _cargopayment_desc[] = {
diff --git a/src/saveload/map_sl.cpp b/src/saveload/map_sl.cpp
index 34b1098b0..7088a4406 100644
--- a/src/saveload/map_sl.cpp
+++ b/src/saveload/map_sl.cpp
@@ -101,7 +101,7 @@ static void Load_MAP2()
 	for (TileIndex i = 0; i != size;) {
 		SlArray(buf, MAP_SL_BUF_SIZE,
 			/* In those versions the m2 was 8 bits */
-			CheckSavegameVersion(5) ? SLE_FILE_U8 | SLE_VAR_U16 : SLE_UINT16
+			IsSavegameVersionBefore(5) ? SLE_FILE_U8 | SLE_VAR_U16 : SLE_UINT16
 		);
 		for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) _m[i++].m2 = buf[j];
 	}
@@ -193,7 +193,7 @@ static void Load_MAP6()
 	SmallStackSafeStackAlloc<byte, MAP_SL_BUF_SIZE> buf;
 	TileIndex size = MapSize();
 
-	if (CheckSavegameVersion(42)) {
+	if (IsSavegameVersionBefore(42)) {
 		for (TileIndex i = 0; i != size;) {
 			/* 1024, otherwise we overflow on 64x64 maps! */
 			SlArray(buf, 1024, SLE_UINT8);
diff --git a/src/saveload/misc_sl.cpp b/src/saveload/misc_sl.cpp
index b73207b38..4415d67d6 100644
--- a/src/saveload/misc_sl.cpp
+++ b/src/saveload/misc_sl.cpp
@@ -122,7 +122,7 @@ static void SaveLoad_DATE()
 static void Check_DATE()
 {
 	SlGlobList(_date_check_desc);
-	if (CheckSavegameVersion(31)) {
+	if (IsSavegameVersionBefore(31)) {
 		_load_check_data.current_date += DAYS_TILL_ORIGINAL_BASE_YEAR;
 	}
 }
diff --git a/src/saveload/newgrf_sl.cpp b/src/saveload/newgrf_sl.cpp
index bba77d77a..2966bd08c 100644
--- a/src/saveload/newgrf_sl.cpp
+++ b/src/saveload/newgrf_sl.cpp
@@ -78,7 +78,7 @@ static void Load_NGRF_common(GRFConfig *&grfconfig)
 	while (SlIterateArray() != -1) {
 		GRFConfig *c = new GRFConfig();
 		SlObject(c, _grfconfig_desc);
-		if (CheckSavegameVersion(101)) c->SetSuitablePalette();
+		if (IsSavegameVersionBefore(101)) c->SetSuitablePalette();
 		AppendToGRFConfigList(&grfconfig, c);
 	}
 }
diff --git a/src/saveload/object_sl.cpp b/src/saveload/object_sl.cpp
index b1e2200cd..c79da592d 100644
--- a/src/saveload/object_sl.cpp
+++ b/src/saveload/object_sl.cpp
@@ -52,7 +52,7 @@ static void Ptrs_OBJS()
 	Object *o;
 	FOR_ALL_OBJECTS(o) {
 		SlObject(o, _object_desc);
-		if (CheckSavegameVersion(148) && !IsTileType(o->location.tile, MP_OBJECT)) {
+		if (IsSavegameVersionBefore(148) && !IsTileType(o->location.tile, MP_OBJECT)) {
 			/* Due to a small bug stale objects could remain. */
 			delete o;
 		} else {
diff --git a/src/saveload/order_sl.cpp b/src/saveload/order_sl.cpp
index 28be21b42..31c6c9fb8 100644
--- a/src/saveload/order_sl.cpp
+++ b/src/saveload/order_sl.cpp
@@ -23,7 +23,7 @@ void Order::ConvertFromOldSavegame()
 	this->flags = 0;
 
 	/* First handle non-stop - use value from savegame if possible, else use value from config file */
-	if (_settings_client.gui.sg_new_nonstop || (CheckSavegameVersion(22) && _settings_client.gui.new_nonstop)) {
+	if (_settings_client.gui.sg_new_nonstop || (IsSavegameVersionBefore(22) && _settings_client.gui.new_nonstop)) {
 		/* OFB_NON_STOP */
 		this->SetNonStopType((old_flags & 8) ? ONSF_NO_STOP_AT_ANY_STATION : ONSF_NO_STOP_AT_INTERMEDIATE_STATIONS);
 	} else {
@@ -44,7 +44,7 @@ void Order::ConvertFromOldSavegame()
 			this->SetLoadType(OLF_LOAD_IF_POSSIBLE);
 		} else {
 			/* old OTTD versions stored full_load_any in config file - assume it was enabled when loading */
-			this->SetLoadType(_settings_client.gui.sg_full_load_any || CheckSavegameVersion(22) ? OLF_FULL_LOAD_ANY : OLFB_FULL_LOAD);
+			this->SetLoadType(_settings_client.gui.sg_full_load_any || IsSavegameVersionBefore(22) ? OLF_FULL_LOAD_ANY : OLFB_FULL_LOAD);
 		}
 
 		if (this->IsType(OT_GOTO_STATION)) this->SetStopLocation(OSL_PLATFORM_FAR_END);
@@ -134,7 +134,7 @@ static void Load_ORDR()
 		 * (in the old days, the orderlist was 5000 items big) */
 		size_t len = SlGetFieldLength();
 
-		if (CheckSavegameVersion(5)) {
+		if (IsSavegameVersionBefore(5)) {
 			/* Pre-version 5 had another layout for orders
 			 * (uint16 instead of uint32) */
 			len /= sizeof(uint16);
diff --git a/src/saveload/saveload.cpp b/src/saveload/saveload.cpp
index b57537fec..90e50b40f 100644
--- a/src/saveload/saveload.cpp
+++ b/src/saveload/saveload.cpp
@@ -686,7 +686,7 @@ static inline byte SlCalcConvFileLen(VarType conv)
 /** Return the size in bytes of a reference (pointer) */
 static inline size_t SlCalcRefLen()
 {
-	return CheckSavegameVersion(69) ? 2 : 4;
+	return IsSavegameVersionBefore(69) ? 2 : 4;
 }
 
 void SlSetArrayIndex(uint index)
@@ -1200,7 +1200,7 @@ static inline size_t SlCalcListLen(const void *list)
 {
 	std::list<void *> *l = (std::list<void *> *) list;
 
-	int type_size = CheckSavegameVersion(69) ? 2 : 4;
+	int type_size = IsSavegameVersionBefore(69) ? 2 : 4;
 	/* Each entry is saved as type_size bytes, plus type_size bytes are used for the length
 	 * of the list */
 	return l->size() * type_size + type_size;
@@ -1237,11 +1237,11 @@ static void SlList(void *list, SLRefType conv)
 		}
 		case SLA_LOAD_CHECK:
 		case SLA_LOAD: {
-			size_t length = CheckSavegameVersion(69) ? SlReadUint16() : SlReadUint32();
+			size_t length = IsSavegameVersionBefore(69) ? SlReadUint16() : SlReadUint32();
 
 			/* Load each reference and push to the end of the list */
 			for (size_t i = 0; i < length; i++) {
-				size_t data = CheckSavegameVersion(69) ? SlReadUint16() : SlReadUint32();
+				size_t data = IsSavegameVersionBefore(69) ? SlReadUint16() : SlReadUint32();
 				l->push_back((void *)data);
 			}
 			break;
@@ -1359,7 +1359,7 @@ bool SlObjectMember(void *ptr, const SaveLoad *sld)
 							break;
 						case SLA_LOAD_CHECK:
 						case SLA_LOAD:
-							*(size_t *)ptr = CheckSavegameVersion(69) ? SlReadUint16() : SlReadUint32();
+							*(size_t *)ptr = IsSavegameVersionBefore(69) ? SlReadUint16() : SlReadUint32();
 							break;
 						case SLA_PTRS:
 							*(void **)ptr = IntToReference(*(size_t *)ptr, (SLRefType)conv);
@@ -2463,7 +2463,7 @@ SaveOrLoadResult SaveOrLoad(const char *filename, int mode, Subdirectory sb, boo
 
 				GamelogReset();
 
-				if (CheckSavegameVersion(4)) {
+				if (IsSavegameVersionBefore(4)) {
 					/*
 					 * NewGRFs were introduced between 0.3,4 and 0.3.5, which both
 					 * shared savegame version 4. Anything before that 'obviously'
diff --git a/src/saveload/saveload.h b/src/saveload/saveload.h
index 8e16f5369..ddf6b6dc5 100644
--- a/src/saveload/saveload.h
+++ b/src/saveload/saveload.h
@@ -461,17 +461,6 @@ static inline bool IsSavegameVersionBefore(uint16 major, byte minor = 0)
 }
 
 /**
- * Checks if the savegame is below \a version.
- * @param version First version that is too large.
- * @return Savegame version equal or larger than \a version.
- */
-static inline bool CheckSavegameVersion(uint16 version)
-{
-	extern uint16 _sl_version;
-	return _sl_version < version;
-}
-
-/**
  * Checks if some version from/to combination falls within the range of the
  * active savegame version.
  * @param version_from Lowest version number that falls within the range.
diff --git a/src/saveload/signs_sl.cpp b/src/saveload/signs_sl.cpp
index f2a4bebbc..8aeceddc7 100644
--- a/src/saveload/signs_sl.cpp
+++ b/src/saveload/signs_sl.cpp
@@ -50,7 +50,7 @@ static void Load_SIGN()
 		 *  - we can't use IsValidCompany() now, so this is fixed in AfterLoadGame()
 		 * All signs that were saved are valid (including those with just 'Sign' and INVALID_OWNER).
 		 *  - so set owner to OWNER_NONE if needed (signs from pre-version 6.1 would be lost) */
-		if (IsSavegameVersionBefore(6, 1) || (CheckSavegameVersion(83) && si->owner == INVALID_OWNER)) {
+		if (IsSavegameVersionBefore(6, 1) || (IsSavegameVersionBefore(83) && si->owner == INVALID_OWNER)) {
 			si->owner = OWNER_NONE;
 		}
 	}
diff --git a/src/saveload/station_sl.cpp b/src/saveload/station_sl.cpp
index 1be9b417e..9e4872402 100644
--- a/src/saveload/station_sl.cpp
+++ b/src/saveload/station_sl.cpp
@@ -258,15 +258,15 @@ static void Load_STNS()
 
 		_waiting_acceptance = 0;
 
-		uint num_cargo = CheckSavegameVersion(55) ? 12 : NUM_CARGO;
+		uint num_cargo = IsSavegameVersionBefore(55) ? 12 : NUM_CARGO;
 		for (CargoID i = 0; i < num_cargo; i++) {
 			GoodsEntry *ge = &st->goods[i];
 			SlObject(ge, GetGoodsDesc());
-			if (CheckSavegameVersion(68)) {
+			if (IsSavegameVersionBefore(68)) {
 				SB(ge->acceptance_pickup, GoodsEntry::ACCEPTANCE, 1, HasBit(_waiting_acceptance, 15));
 				if (GB(_waiting_acceptance, 0, 12) != 0) {
 					/* In old versions, enroute_from used 0xFF as INVALID_STATION */
-					StationID source = (CheckSavegameVersion(7) && _cargo_source == 0xFF) ? INVALID_STATION : _cargo_source;
+					StationID source = (IsSavegameVersionBefore(7) && _cargo_source == 0xFF) ? INVALID_STATION : _cargo_source;
 
 					/* Don't construct the packet with station here, because that'll fail with old savegames */
 					ge->cargo.Append(new CargoPacket(GB(_waiting_acceptance, 0, 12), _cargo_days, source, _cargo_source_xy, _cargo_source_xy, _cargo_feeder_share));
@@ -288,11 +288,11 @@ static void Load_STNS()
 static void Ptrs_STNS()
 {
 	/* Don't run when savegame version is higher than or equal to 123. */
-	if (!CheckSavegameVersion(123)) return;
+	if (!IsSavegameVersionBefore(123)) return;
 
 	Station *st;
 	FOR_ALL_STATIONS(st) {
-		if (!CheckSavegameVersion(68)) {
+		if (!IsSavegameVersionBefore(68)) {
 			for (CargoID i = 0; i < NUM_CARGO; i++) {
 				GoodsEntry *ge = &st->goods[i];
 				SlObject(ge, GetGoodsDesc());
@@ -432,7 +432,7 @@ static void Load_STNN()
 static void Ptrs_STNN()
 {
 	/* Don't run when savegame version lower than 123. */
-	if (CheckSavegameVersion(123)) return;
+	if (IsSavegameVersionBefore(123)) return;
 
 	Station *st;
 	FOR_ALL_STATIONS(st) {
diff --git a/src/saveload/strings_sl.cpp b/src/saveload/strings_sl.cpp
index 83ed2537b..beb39e965 100644
--- a/src/saveload/strings_sl.cpp
+++ b/src/saveload/strings_sl.cpp
@@ -56,7 +56,7 @@ char *CopyFromOldName(StringID id)
 	/* Is this name an (old) custom name? */
 	if (GB(id, 11, 5) != 15) return NULL;
 
-	if (CheckSavegameVersion(37)) {
+	if (IsSavegameVersionBefore(37)) {
 		/* Old names were 24/32 characters long, so 128 characters should be
 		 * plenty to allow for expansion when converted to UTF-8. */
 		char tmp[128];
diff --git a/src/saveload/vehicle_sl.cpp b/src/saveload/vehicle_sl.cpp
index 6962a4f85..c081ba2bc 100644
--- a/src/saveload/vehicle_sl.cpp
+++ b/src/saveload/vehicle_sl.cpp
@@ -268,7 +268,7 @@ void AfterLoadVehicles(bool part_of_load)
 
 		FOR_ALL_VEHICLES(v) {
 			if (v->orders.old != NULL) {
-				if (CheckSavegameVersion(105)) { // Pre-105 didn't save an OrderList
+				if (IsSavegameVersionBefore(105)) { // Pre-105 didn't save an OrderList
 					if (mapping[v->orders.old] == NULL) {
 						/* This adds the whole shared vehicle chain for case b */
 						v->orders.list = mapping[v->orders.old] = new OrderList(v->orders.old, v);
@@ -297,7 +297,7 @@ void AfterLoadVehicles(bool part_of_load)
 		}
 	}
 
-	if (CheckSavegameVersion(105)) {
+	if (IsSavegameVersionBefore(105)) {
 		/* Before 105 there was no order for shared orders, thus it messed up horribly */
 		FOR_ALL_VEHICLES(v) {
 			if (v->First() != v || v->orders.list != NULL || v->previous_shared != NULL || v->next_shared == NULL) continue;
@@ -344,7 +344,7 @@ void AfterLoadVehicles(bool part_of_load)
 	}
 
 	/* Stop non-front engines */
-	if (CheckSavegameVersion(112)) {
+	if (IsSavegameVersionBefore(112)) {
 		FOR_ALL_VEHICLES(v) {
 			if (v->type == VEH_TRAIN) {
 				Train *t = Train::From(v);
@@ -739,11 +739,11 @@ void Load_VEHS()
 		}
 
 		/* Old savegames used 'last_station_visited = 0xFF' */
-		if (CheckSavegameVersion(5) && v->last_station_visited == 0xFF) {
+		if (IsSavegameVersionBefore(5) && v->last_station_visited == 0xFF) {
 			v->last_station_visited = INVALID_STATION;
 		}
 
-		if (CheckSavegameVersion(5)) {
+		if (IsSavegameVersionBefore(5)) {
 			/* Convert the current_order.type (which is a mix of type and flags, because
 			 *  in those versions, they both were 4 bits big) to type and flags */
 			v->current_order.flags = GB(v->current_order.type, 4, 4);
@@ -751,7 +751,7 @@ void Load_VEHS()
 		}
 
 		/* Advanced vehicle lists got added */
-		if (CheckSavegameVersion(60)) v->group_id = DEFAULT_GROUP;
+		if (IsSavegameVersionBefore(60)) v->group_id = DEFAULT_GROUP;
 	}
 }
 
diff --git a/src/saveload/waypoint_sl.cpp b/src/saveload/waypoint_sl.cpp
index 5dac5d8e4..3dce9e3d5 100644
--- a/src/saveload/waypoint_sl.cpp
+++ b/src/saveload/waypoint_sl.cpp
@@ -68,7 +68,7 @@ void MoveWaypointsToBaseStations()
 	 * waypoints to make way for storing the index in m2. The custom graphics
 	 * id which was stored in m4 is now saved as a grf/id reference in the
 	 * waypoint struct. */
-	if (CheckSavegameVersion(17)) {
+	if (IsSavegameVersionBefore(17)) {
 		for (OldWaypoint *wp = _old_waypoints.Begin(); wp != _old_waypoints.End(); wp++) {
 			if (wp->delete_ctr != 0) continue; // The waypoint was deleted
 
@@ -108,7 +108,7 @@ void MoveWaypointsToBaseStations()
 		TileIndex t = wp->xy;
 		if (IsTileType(t, MP_RAILWAY) && GetRailTileType(t) == 2 /* RAIL_TILE_WAYPOINT */ && _m[t].m2 == wp->index) {
 			/* The tile might've been reserved! */
-			bool reserved = !CheckSavegameVersion(100) && HasBit(_m[t].m5, 4);
+			bool reserved = !IsSavegameVersionBefore(100) && HasBit(_m[t].m5, 4);
 
 			/* The tile really has our waypoint, so reassign the map array */
 			MakeRailWaypoint(t, GetTileOwner(t), new_wp->index, (Axis)GB(_m[t].m5, 0, 1), 0, GetRailType(t));
@@ -185,10 +185,10 @@ static void Ptrs_WAYP()
 	for (OldWaypoint *wp = _old_waypoints.Begin(); wp != _old_waypoints.End(); wp++) {
 		SlObject(wp, _old_waypoint_desc);
 
-		if (CheckSavegameVersion(12)) {
+		if (IsSavegameVersionBefore(12)) {
 			wp->town_cn = (wp->string_id & 0xC000) == 0xC000 ? (wp->string_id >> 8) & 0x3F : 0;
 			wp->town = ClosestTownFromTile(wp->xy, UINT_MAX);
-		} else if (CheckSavegameVersion(122)) {
+		} else if (IsSavegameVersionBefore(122)) {
 			/* Only for versions 12 .. 122 */
 			if (!Town::IsValidID(wp->town_index)) {
 				/* Upon a corrupted waypoint we'll likely get here. The next step will be to
@@ -201,7 +201,7 @@ static void Ptrs_WAYP()
 			}
 			wp->town = Town::Get(wp->town_index);
 		}
-		if (CheckSavegameVersion(84)) {
+		if (IsSavegameVersionBefore(84)) {
 			wp->name = CopyFromOldName(wp->string_id);
 		}
 	}
diff --git a/src/settings.cpp b/src/settings.cpp
index 387db7cfa..229ed5ebe 100644
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -1189,7 +1189,7 @@ static void PrepareOldDiffCustom()
  */
 static void HandleOldDiffCustom(bool savegame)
 {
-	uint options_to_load = GAME_DIFFICULTY_NUM - ((savegame && CheckSavegameVersion(4)) ? 1 : 0);
+	uint options_to_load = GAME_DIFFICULTY_NUM - ((savegame && IsSavegameVersionBefore(4)) ? 1 : 0);
 
 	if (!savegame) {
 		/* If we did read to old_diff_custom, then at least one value must be non 0. */