Allow building multiple docks per station.

(cherry picked from commit 0110c4a35d383e0be2cbb53cbe9cbe6784abb3e9)

# Conflicts:
#	src/station_cmd.cpp

projects/openttd_vs100.vcxproj

@@ -333,6 +333,7 @@
     <ClCompile Include="..\src\departures.cpp" />
     <ClCompile Include="..\src\depot.cpp" />
     <ClCompile Include="..\src\disaster_vehicle.cpp" />
+    <ClCompile Include="..\src\dock.cpp" />
     <ClCompile Include="..\src\driver.cpp" />
     <ClCompile Include="..\src\economy.cpp" />
     <ClCompile Include="..\src\effectvehicle.cpp" />
@@ -469,6 +470,7 @@
     <ClInclude Include="..\src\direction_type.h" />
     <ClInclude Include="..\src\disaster_vehicle.h" />
     <ClInclude Include="..\src\music\dmusic.h" />
+    <ClInclude Include="..\src\dock_base.h" />
     <ClInclude Include="..\src\driver.h" />
     <ClInclude Include="..\src\economy_base.h" />
     <ClInclude Include="..\src\economy_func.h" />
@@ -610,6 +612,7 @@
     <ClInclude Include="..\src\sdl.h" />
     <ClInclude Include="..\src\sound\sdl_s.h" />
     <ClInclude Include="..\src\video\sdl_v.h" />
+    <ClInclude Include="..\src\schdispatch.h" />
     <ClInclude Include="..\src\settings_func.h" />
     <ClInclude Include="..\src\settings_gui.h" />
     <ClInclude Include="..\src\settings_internal.h" />
@@ -641,6 +644,7 @@
     <ClInclude Include="..\src\strgen\strgen.h" />
     <ClInclude Include="..\src\string_base.h" />
     <ClInclude Include="..\src\string_func.h" />
+    <ClInclude Include="..\src\string_func_extra.h" />
     <ClInclude Include="..\src\string_type.h" />
     <ClInclude Include="..\src\stringfilter_type.h" />
     <ClInclude Include="..\src\strings_func.h" />
@@ -771,6 +775,7 @@
     <ClCompile Include="..\src\rail_gui.cpp" />
     <ClCompile Include="..\src\road_gui.cpp" />
     <ClCompile Include="..\src\roadveh_gui.cpp" />
+    <ClCompile Include="..\src\schdispatch_gui.cpp" />
     <ClCompile Include="..\src\settings_gui.cpp" />
     <ClCompile Include="..\src\ship_gui.cpp" />
     <ClCompile Include="..\src\signs_gui.cpp" />
@@ -864,6 +869,7 @@
     <ClCompile Include="..\src\rail_cmd.cpp" />
     <ClCompile Include="..\src\road_cmd.cpp" />
     <ClCompile Include="..\src\roadveh_cmd.cpp" />
+    <ClCompile Include="..\src\schdispatch_cmd.cpp" />
     <ClCompile Include="..\src\ship_cmd.cpp" />
     <ClCompile Include="..\src\signs_cmd.cpp" />
     <ClCompile Include="..\src\station_cmd.cpp" />

projects/openttd_vs100.vcxproj.filters

@@ -195,6 +195,9 @@
     <ClCompile Include="..\src\disaster_vehicle.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="..\src\dock.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
     <ClCompile Include="..\src\driver.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
@@ -603,6 +606,9 @@
     <ClInclude Include="..\src\music\dmusic.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="..\src\dock_base.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
     <ClInclude Include="..\src\driver.h">
       <Filter>Header Files</Filter>
     </ClInclude>
@@ -1026,6 +1032,9 @@
     <ClInclude Include="..\src\video\sdl_v.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="..\src\schdispatch.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
     <ClInclude Include="..\src\settings_func.h">
       <Filter>Header Files</Filter>
     </ClInclude>
@@ -1119,6 +1128,9 @@
     <ClInclude Include="..\src\string_func.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="..\src\string_func_extra.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
     <ClInclude Include="..\src\string_type.h">
       <Filter>Header Files</Filter>
     </ClInclude>
@@ -1509,6 +1521,9 @@
     <ClCompile Include="..\src\roadveh_gui.cpp">
       <Filter>GUI Source Code</Filter>
     </ClCompile>
+    <ClCompile Include="..\src\schdispatch_gui.cpp">
+      <Filter>GUI Source Code</Filter>
+    </ClCompile>
     <ClCompile Include="..\src\settings_gui.cpp">
       <Filter>GUI Source Code</Filter>
     </ClCompile>
@@ -1788,6 +1803,9 @@
     <ClCompile Include="..\src\roadveh_cmd.cpp">
       <Filter>Command handlers</Filter>
     </ClCompile>
+    <ClCompile Include="..\src\schdispatch_cmd.cpp">
+      <Filter>Command handlers</Filter>
+    </ClCompile>
     <ClCompile Include="..\src\ship_cmd.cpp">
       <Filter>Command handlers</Filter>
     </ClCompile>

projects/openttd_vs140.vcxproj

@@ -350,6 +350,7 @@
     <ClCompile Include="..\src\departures.cpp" />
     <ClCompile Include="..\src\depot.cpp" />
     <ClCompile Include="..\src\disaster_vehicle.cpp" />
+    <ClCompile Include="..\src\dock.cpp" />
     <ClCompile Include="..\src\driver.cpp" />
     <ClCompile Include="..\src\economy.cpp" />
     <ClCompile Include="..\src\effectvehicle.cpp" />
@@ -486,6 +487,7 @@
     <ClInclude Include="..\src\direction_type.h" />
     <ClInclude Include="..\src\disaster_vehicle.h" />
     <ClInclude Include="..\src\music\dmusic.h" />
+    <ClInclude Include="..\src\dock_base.h" />
     <ClInclude Include="..\src\driver.h" />
     <ClInclude Include="..\src\economy_base.h" />
     <ClInclude Include="..\src\economy_func.h" />
@@ -627,6 +629,7 @@
     <ClInclude Include="..\src\sdl.h" />
     <ClInclude Include="..\src\sound\sdl_s.h" />
     <ClInclude Include="..\src\video\sdl_v.h" />
+    <ClInclude Include="..\src\schdispatch.h" />
     <ClInclude Include="..\src\settings_func.h" />
     <ClInclude Include="..\src\settings_gui.h" />
     <ClInclude Include="..\src\settings_internal.h" />
@@ -658,6 +661,7 @@
     <ClInclude Include="..\src\strgen\strgen.h" />
     <ClInclude Include="..\src\string_base.h" />
     <ClInclude Include="..\src\string_func.h" />
+    <ClInclude Include="..\src\string_func_extra.h" />
     <ClInclude Include="..\src\string_type.h" />
     <ClInclude Include="..\src\stringfilter_type.h" />
     <ClInclude Include="..\src\strings_func.h" />
@@ -788,6 +792,7 @@
     <ClCompile Include="..\src\rail_gui.cpp" />
     <ClCompile Include="..\src\road_gui.cpp" />
     <ClCompile Include="..\src\roadveh_gui.cpp" />
+    <ClCompile Include="..\src\schdispatch_gui.cpp" />
     <ClCompile Include="..\src\settings_gui.cpp" />
     <ClCompile Include="..\src\ship_gui.cpp" />
     <ClCompile Include="..\src\signs_gui.cpp" />
@@ -881,6 +886,7 @@
     <ClCompile Include="..\src\rail_cmd.cpp" />
     <ClCompile Include="..\src\road_cmd.cpp" />
     <ClCompile Include="..\src\roadveh_cmd.cpp" />
+    <ClCompile Include="..\src\schdispatch_cmd.cpp" />
     <ClCompile Include="..\src\ship_cmd.cpp" />
     <ClCompile Include="..\src\signs_cmd.cpp" />
     <ClCompile Include="..\src\station_cmd.cpp" />

projects/openttd_vs140.vcxproj.filters

@@ -195,6 +195,9 @@
     <ClCompile Include="..\src\disaster_vehicle.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="..\src\dock.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
     <ClCompile Include="..\src\driver.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
@@ -603,6 +606,9 @@
     <ClInclude Include="..\src\music\dmusic.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="..\src\dock_base.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
     <ClInclude Include="..\src\driver.h">
       <Filter>Header Files</Filter>
     </ClInclude>
@@ -1026,6 +1032,9 @@
     <ClInclude Include="..\src\video\sdl_v.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="..\src\schdispatch.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
     <ClInclude Include="..\src\settings_func.h">
       <Filter>Header Files</Filter>
     </ClInclude>
@@ -1119,6 +1128,9 @@
     <ClInclude Include="..\src\string_func.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="..\src\string_func_extra.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
     <ClInclude Include="..\src\string_type.h">
       <Filter>Header Files</Filter>
     </ClInclude>
@@ -1509,6 +1521,9 @@
     <ClCompile Include="..\src\roadveh_gui.cpp">
       <Filter>GUI Source Code</Filter>
     </ClCompile>
+    <ClCompile Include="..\src\schdispatch_gui.cpp">
+      <Filter>GUI Source Code</Filter>
+    </ClCompile>
     <ClCompile Include="..\src\settings_gui.cpp">
       <Filter>GUI Source Code</Filter>
     </ClCompile>
@@ -1788,6 +1803,9 @@
     <ClCompile Include="..\src\roadveh_cmd.cpp">
       <Filter>Command handlers</Filter>
     </ClCompile>
+    <ClCompile Include="..\src\schdispatch_cmd.cpp">
+      <Filter>Command handlers</Filter>
+    </ClCompile>
     <ClCompile Include="..\src\ship_cmd.cpp">
       <Filter>Command handlers</Filter>
     </ClCompile>

projects/openttd_vs80.vcproj

@@ -554,6 +554,10 @@
 				RelativePath=".\..\src\disaster_vehicle.cpp"
 				>
 			</File>
+			<File
+				RelativePath=".\..\src\dock.cpp"
+				>
+			</File>
 			<File
 				RelativePath=".\..\src\driver.cpp"
 				>
@@ -1102,6 +1106,10 @@
 				RelativePath=".\..\src\music\dmusic.h"
 				>
 			</File>
+			<File
+				RelativePath=".\..\src\dock_base.h"
+				>
+			</File>
 			<File
 				RelativePath=".\..\src\driver.h"
 				>
@@ -1666,6 +1674,10 @@
 				RelativePath=".\..\src\video\sdl_v.h"
 				>
 			</File>
+			<File
+				RelativePath=".\..\src\schdispatch.h"
+				>
+			</File>
 			<File
 				RelativePath=".\..\src\settings_func.h"
 				>
@@ -1790,6 +1802,10 @@
 				RelativePath=".\..\src\string_func.h"
 				>
 			</File>
+			<File
+				RelativePath=".\..\src\string_func_extra.h"
+				>
+			</File>
 			<File
 				RelativePath=".\..\src\string_type.h"
 				>
@@ -2318,6 +2334,10 @@
 				RelativePath=".\..\src\roadveh_gui.cpp"
 				>
 			</File>
+			<File
+				RelativePath=".\..\src\schdispatch_gui.cpp"
+				>
+			</File>
 			<File
 				RelativePath=".\..\src\settings_gui.cpp"
 				>
@@ -2698,6 +2718,10 @@
 				RelativePath=".\..\src\roadveh_cmd.cpp"
 				>
 			</File>
+			<File
+				RelativePath=".\..\src\schdispatch_cmd.cpp"
+				>
+			</File>
 			<File
 				RelativePath=".\..\src\ship_cmd.cpp"
 				>

projects/openttd_vs90.vcproj

@@ -551,6 +551,10 @@
 				RelativePath=".\..\src\disaster_vehicle.cpp"
 				>
 			</File>
+			<File
+				RelativePath=".\..\src\dock.cpp"
+				>
+			</File>
 			<File
 				RelativePath=".\..\src\driver.cpp"
 				>
@@ -1099,6 +1103,10 @@
 				RelativePath=".\..\src\music\dmusic.h"
 				>
 			</File>
+			<File
+				RelativePath=".\..\src\dock_base.h"
+				>
+			</File>
 			<File
 				RelativePath=".\..\src\driver.h"
 				>
@@ -1663,6 +1671,10 @@
 				RelativePath=".\..\src\video\sdl_v.h"
 				>
 			</File>
+			<File
+				RelativePath=".\..\src\schdispatch.h"
+				>
+			</File>
 			<File
 				RelativePath=".\..\src\settings_func.h"
 				>
@@ -1787,6 +1799,10 @@
 				RelativePath=".\..\src\string_func.h"
 				>
 			</File>
+			<File
+				RelativePath=".\..\src\string_func_extra.h"
+				>
+			</File>
 			<File
 				RelativePath=".\..\src\string_type.h"
 				>
@@ -2315,6 +2331,10 @@
 				RelativePath=".\..\src\roadveh_gui.cpp"
 				>
 			</File>
+			<File
+				RelativePath=".\..\src\schdispatch_gui.cpp"
+				>
+			</File>
 			<File
 				RelativePath=".\..\src\settings_gui.cpp"
 				>
@@ -2695,6 +2715,10 @@
 				RelativePath=".\..\src\roadveh_cmd.cpp"
 				>
 			</File>
+			<File
+				RelativePath=".\..\src\schdispatch_cmd.cpp"
+				>
+			</File>
 			<File
 				RelativePath=".\..\src\ship_cmd.cpp"
 				>

source.list

@@ -30,6 +30,7 @@ dedicated.cpp
 departures.cpp
 depot.cpp
 disaster_vehicle.cpp
+dock.cpp
 driver.cpp
 economy.cpp
 effectvehicle.cpp
@@ -197,6 +198,7 @@ direction_func.h
 direction_type.h
 disaster_vehicle.h
 music/dmusic.h
+dock_base.h
 driver.h
 economy_base.h
 economy_func.h

src/base_station_base.h

@@ -156,6 +156,16 @@ struct BaseStation : StationPool::PoolItem<&_station_pool> {
 		return (this->facilities & ~FACIL_WAYPOINT) != 0;
 	}
 
+	/**
+	 * Check whether the base station has given facilities.
+	 * @param facilities The facilities to check.
+	 * @return True if station has at least one of the given \a facilities.
+	 */
+	inline bool HasFacilities(StationFacility facilities) const
+	{
+		return (this->facilities & facilities) != 0;
+	}
+
 	static void PostDestructor(size_t index);
 };
 

src/dock.cpp

@@ -0,0 +1,37 @@
+/* $Id: dock.cpp $ */
+
+/*
+* This file is part of OpenTTD.
+* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/** @file dock.cpp Implementation of the dock base class. */
+
+#include "stdafx.h"
+#include "core/pool_func.hpp"
+#include "dock_base.h"
+#include "station_base.h"
+
+/** The pool of docks. */
+DockPool _dock_pool("Dock");
+INSTANTIATE_POOL_METHODS(Dock)
+
+/**
+* Find a dock at a given tile.
+* @param tile Tile with a dock.
+* @return The dock in the given tile.
+* @pre IsDockTile()
+*/
+/* static */ Dock *Dock::GetByTile(TileIndex tile)
+{
+	const Station *st = Station::GetByTile(tile);
+
+	for (Dock *d = st->GetPrimaryDock();; d = d->next) {
+		if (d->sloped == tile || d->flat == tile) return d;
+		assert(d->next != NULL);
+	}
+
+	NOT_REACHED();
+}

src/dock_base.h

@@ -0,0 +1,40 @@
+/* $Id: dock_base.h $ */
+
+/*
+* This file is part of OpenTTD.
+* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/** @file dock_base.h Base class for docks. */
+
+#ifndef DOCK_BASE_H
+#define DOCK_BASE_H
+
+#include "station_type.h"
+#include "tile_type.h"
+#include "core/pool_type.hpp"
+
+typedef Pool<Dock, DockID, 32, 64000> DockPool;
+extern DockPool _dock_pool;
+
+/** A Dock structure. */
+struct Dock : DockPool::PoolItem<&_dock_pool> {
+	TileIndex sloped; ///< The sloped tile of the dock.
+	TileIndex flat;   ///< Position on the map of the flat tile.
+	Dock *next;       ///< Next dock of the given type at this station.
+
+	Dock(TileIndex s = INVALID_TILE, TileIndex f = INVALID_TILE) : sloped(s), flat(f), next(NULL) { }
+
+	~Dock() {}
+
+	inline Dock *GetNextDock() const { return this->next; }
+
+	static Dock *GetByTile(TileIndex tile);
+};
+
+#define FOR_ALL_DOCKS_FROM(var, start) FOR_ALL_ITEMS_FROM(Dock, dock_index, var, start)
+#define FOR_ALL_DOCKS(var) FOR_ALL_DOCKS_FROM(var, 0)
+
+#endif /* DOCK_BASE_H */

src/lang/english.txt

@@ -4959,6 +4959,7 @@ STR_ERROR_TOO_MANY_BUS_STOPS                                    :{WHITE}Too many
 STR_ERROR_TOO_MANY_TRUCK_STOPS                                  :{WHITE}Too many lorry stations
 STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION                          :{WHITE}Too close to another station/loading area
 STR_ERROR_TOO_CLOSE_TO_ANOTHER_DOCK                             :{WHITE}Too close to another dock
+STR_ERROR_TOO_MANY_DOCKS                                        :{WHITE}Too many docks
 STR_ERROR_TOO_CLOSE_TO_ANOTHER_AIRPORT                          :{WHITE}Too close to another airport
 STR_ERROR_CAN_T_RENAME_STATION                                  :{WHITE}Can't rename station...
 STR_ERROR_DRIVE_THROUGH_ON_TOWN_ROAD                            :{WHITE}... this is a town owned road

src/order_cmd.cpp

@@ -2525,7 +2525,7 @@ bool ProcessOrders(Vehicle *v)
 
 	/* If it is unchanged, keep it. */
 	if (order->Equals(v->current_order) && (v->type == VEH_AIRCRAFT || v->dest_tile != 0) &&
-			(v->type != VEH_SHIP || !order->IsType(OT_GOTO_STATION) || Station::Get(order->GetDestination())->dock_tile != INVALID_TILE)) {
+			(v->type != VEH_SHIP || !order->IsType(OT_GOTO_STATION) || Station::Get(order->GetDestination())->HasFacilities(FACIL_DOCK))) {
 		return false;
 	}
 

src/saveload/afterload.cpp

@@ -30,6 +30,7 @@
 #include "../station_base.h"
 #include "../waypoint_base.h"
 #include "../roadstop_base.h"
+#include "../dock_base.h"
 #include "../tunnelbridge_map.h"
 #include "../pathfinder/yapf/yapf_cache.h"
 #include "../elrail_func.h"
@@ -728,9 +729,9 @@ bool AfterLoadGame()
 		/* no station is determined by 'tile == INVALID_TILE' now (instead of '0') */
 		Station *st;
 		FOR_ALL_STATIONS(st) {
-			if (st->airport.tile       == 0) st->airport.tile = INVALID_TILE;
+			if (st->airport.tile       == 0) st->airport.tile       = INVALID_TILE;
-			if (st->dock_tile          == 0) st->dock_tile    = INVALID_TILE;
+			if (st->dock_station.tile  == 0) st->dock_station.tile  = INVALID_TILE;
-			if (st->train_station.tile == 0) st->train_station.tile   = INVALID_TILE;
+			if (st->train_station.tile == 0) st->train_station.tile = INVALID_TILE;
 		}
 
 		/* the same applies to Company::location_of_HQ */
@@ -3343,6 +3344,21 @@ bool AfterLoadGame()
 		FOR_ALL_STATIONS(st) UpdateStationAcceptance(st, false);
 	}
 
+	if (IsPatchPackSavegameVersionBefore(SL_PATCH_PACK_1_18)) {
+		/* Dock type has changed. */
+		Station *st;
+		FOR_ALL_STATIONS(st) {
+			if (st->dock_station.tile == INVALID_TILE) continue;
+			assert(Dock::CanAllocateItem());
+			if (IsOilRig(st->dock_station.tile)) {
+				/* Set dock station tile to dest tile instead of station. */
+				st->docks = new Dock(st->dock_station.tile, st->dock_station.tile + ToTileIndexDiff({1, 0}));
+			} else { /* A normal two-tiles dock. */
+				st->docks = new Dock(st->dock_station.tile, TileAddByDiagDir(st->dock_station.tile, GetDockDirection(st->dock_station.tile)));
+			}
+		}
+	}
+
 	// setting moved from game settings to company settings
 	if (SlXvIsFeaturePresent(XSLFI_ORDER_OCCUPANCY, 1, 1)) {
 		Company *c;

src/saveload/oldloader_sl.cpp

@@ -728,7 +728,7 @@ static const OldChunks station_chunk[] = {
 	OCL_NULL( 4 ), ///< bus/lorry tile
 	OCL_SVAR(   OC_TILE, Station, train_station.tile ),
 	OCL_SVAR(   OC_TILE, Station, airport.tile ),
-	OCL_SVAR(   OC_TILE, Station, dock_tile ),
+	OCL_SVAR(   OC_TILE, Station, dock_station.tile),
 	OCL_SVAR( OC_FILE_U8 | OC_VAR_U16, Station, train_station.w ),
 
 	OCL_NULL( 1 ),         ///< sort-index, no longer in use

src/saveload/saveload.cpp

@@ -24,6 +24,7 @@
 #include "../stdafx.h"
 #include "../debug.h"
 #include "../station_base.h"
+#include "../dock_base.h"
 #include "../thread/thread.h"
 #include "../town.h"
 #include "../network/network.h"
@@ -1344,6 +1345,7 @@ static size_t ReferenceToInt(const void *obj, SLRefType rt)
 		case REF_STORAGE:        return ((const PersistentStorage*)obj)->index + 1;
 		case REF_LINK_GRAPH:     return ((const         LinkGraph*)obj)->index + 1;
 		case REF_LINK_GRAPH_JOB: return ((const      LinkGraphJob*)obj)->index + 1;
+		case REF_DOCKS:          return ((const              Dock*)obj)->index + 1;
 		default: NOT_REACHED();
 	}
 }
@@ -1409,6 +1411,10 @@ static void *IntToReference(size_t index, SLRefType rt)
 			if (RoadStop::IsValidID(index)) return RoadStop::Get(index);
 			SlErrorCorrupt("Referencing invalid RoadStop");
 
+		case REF_DOCKS:
+			if (Dock::IsValidID(index)) return Dock::Get(index);
+			SlErrorCorrupt("Referencing invalid Dock");
+
 		case REF_ENGINE_RENEWS:
 			if (EngineRenew::IsValidID(index)) return EngineRenew::Get(index);
 			SlErrorCorrupt("Referencing invalid EngineRenew");

src/saveload/saveload.h

@@ -81,19 +81,20 @@ struct NullStruct {
 
 /** Type of reference (#SLE_REF, #SLE_CONDREF). */
 enum SLRefType {
-	REF_ORDER          =  0, ///< Load/save a reference to an order.
+	REF_ORDER            =  0,	///< Load/save a reference to an order.
-	REF_VEHICLE        =  1, ///< Load/save a reference to a vehicle.
+	REF_VEHICLE          =  1,	///< Load/save a reference to a vehicle.
-	REF_STATION        =  2, ///< Load/save a reference to a station.
+	REF_STATION          =  2,	///< Load/save a reference to a station.
-	REF_TOWN           =  3, ///< Load/save a reference to a town.
+	REF_TOWN             =  3,	///< Load/save a reference to a town.
-	REF_VEHICLE_OLD    =  4, ///< Load/save an old-style reference to a vehicle (for pre-4.4 savegames).
+	REF_VEHICLE_OLD      =  4,	///< Load/save an old-style reference to a vehicle (for pre-4.4 savegames).
-	REF_ROADSTOPS      =  5, ///< Load/save a reference to a bus/truck stop.
+	REF_ROADSTOPS        =  5,	///< Load/save a reference to a bus/truck stop.
-	REF_ENGINE_RENEWS  =  6, ///< Load/save a reference to an engine renewal (autoreplace).
+	REF_ENGINE_RENEWS    =  6,	///< Load/save a reference to an engine renewal (autoreplace).
-	REF_CARGO_PACKET   =  7, ///< Load/save a reference to a cargo packet.
+	REF_CARGO_PACKET     =  7,	///< Load/save a reference to a cargo packet.
-	REF_ORDERLIST      =  8, ///< Load/save a reference to an orderlist.
+	REF_ORDERLIST        =  8,	///< Load/save a reference to an orderlist.
-	REF_STORAGE        =  9, ///< Load/save a reference to a persistent storage.
+	REF_STORAGE          =  9,	///< Load/save a reference to a persistent storage.
-	REF_LINK_GRAPH     = 10, ///< Load/save a reference to a link graph.
+	REF_LINK_GRAPH       = 10,	///< Load/save a reference to a link graph.
-	REF_LINK_GRAPH_JOB = 11, ///< Load/save a reference to a link graph job.
+	REF_LINK_GRAPH_JOB   = 11,	///< Load/save a reference to a link graph job.
-	REF_TEMPLATE_VEHICLE = 12, ///< Load/save a reference to a template vehicle
+	REF_TEMPLATE_VEHICLE = 12,	///< Load/save a reference to a template vehicle
+	REF_DOCKS            = 13,	///< Load/save a reference to a dock.
 };
 
 /** Highest possible savegame version. */

src/saveload/station_sl.cpp

@@ -13,6 +13,7 @@
 #include "../station_base.h"
 #include "../waypoint_base.h"
 #include "../roadstop_base.h"
+#include "../dock_base.h"
 #include "../vehicle_base.h"
 #include "../newgrf_station.h"
 
@@ -123,6 +124,11 @@ void AfterLoadStations()
 			Station *sta = Station::From(st);
 			for (const RoadStop *rs = sta->bus_stops; rs != NULL; rs = rs->next) sta->bus_station.Add(rs->xy);
 			for (const RoadStop *rs = sta->truck_stops; rs != NULL; rs = rs->next) sta->truck_station.Add(rs->xy);
+
+			for (const Dock *d = sta->docks; d != NULL; d = d->next) {
+				sta->dock_station.Add(d->sloped);
+				sta->dock_station.Add(d->flat);
+			}
 		}
 
 		StationUpdateCachedTriggers(st);
@@ -166,6 +172,14 @@ static const SaveLoad _roadstop_desc[] = {
 	SLE_END()
 };
 
+static const SaveLoad _dock_desc[] = {
+	SLE_VAR(Dock, sloped,       SLE_UINT32),
+	SLE_VAR(Dock, flat,         SLE_UINT32),
+	SLE_REF(Dock, next,         REF_DOCKS),
+
+	SLE_END()
+};
+
 static const SaveLoad _old_station_desc[] = {
 	SLE_CONDVAR(Station, xy,                         SLE_FILE_U16 | SLE_VAR_U32,  0, 5),
 	SLE_CONDVAR(Station, xy,                         SLE_UINT32,                  6, SL_MAX_VERSION),
@@ -174,8 +188,8 @@ static const SaveLoad _old_station_desc[] = {
 	SLE_CONDVAR(Station, train_station.tile,         SLE_UINT32,                  6, SL_MAX_VERSION),
 	SLE_CONDVAR(Station, airport.tile,               SLE_FILE_U16 | SLE_VAR_U32,  0, 5),
 	SLE_CONDVAR(Station, airport.tile,               SLE_UINT32,                  6, SL_MAX_VERSION),
-	SLE_CONDVAR(Station, dock_tile,                  SLE_FILE_U16 | SLE_VAR_U32,  0, 5),
+	SLE_CONDVAR(Station, dock_station.tile,          SLE_FILE_U16 | SLE_VAR_U32,  0, 5),
-	SLE_CONDVAR(Station, dock_tile,                  SLE_UINT32,                  6, SL_MAX_VERSION),
+	SLE_CONDVAR(Station, dock_station.tile,          SLE_UINT32,                  6, SL_MAX_VERSION),
 	    SLE_REF(Station, town,                       REF_TOWN),
 	    SLE_VAR(Station, train_station.w,            SLE_FILE_U8 | SLE_VAR_U16),
 	SLE_CONDVAR(Station, train_station.h,            SLE_FILE_U8 | SLE_VAR_U16,   2, SL_MAX_VERSION),
@@ -425,7 +439,8 @@ static const SaveLoad _station_desc[] = {
 
 	      SLE_REF(Station, bus_stops,                  REF_ROADSTOPS),
 	      SLE_REF(Station, truck_stops,                REF_ROADSTOPS),
-	      SLE_VAR(Station, dock_tile,                  SLE_UINT32),
+      SLE_CONDVAR(Station, dock_station.tile,          SLE_UINT32,                  0, SL_PATCH_PACK_1_18 - 1),
+      SLE_CONDREF(Station, docks,                      REF_DOCKS,  SL_PATCH_PACK_1_18, SL_MAX_VERSION),
 	      SLE_VAR(Station, airport.tile,               SLE_UINT32),
 	  SLE_CONDVAR(Station, airport.w,                  SLE_FILE_U8 | SLE_VAR_U16, 140, SL_MAX_VERSION),
 	  SLE_CONDVAR(Station, airport.h,                  SLE_FILE_U8 | SLE_VAR_U16, 140, SL_MAX_VERSION),
@@ -638,8 +653,38 @@ static void Ptrs_ROADSTOP()
 	}
 }
 
+static void Save_DOCK()
+{
+	Dock *d;
+
+	FOR_ALL_DOCKS(d) {
+		SlSetArrayIndex(d->index);
+		SlObject(d, _dock_desc);
+	}
+}
+
+static void Load_DOCK()
+{
+	int index;
+
+	while ((index = SlIterateArray()) != -1) {
+		Dock *d = new (index) Dock();
+
+		SlObject(d, _dock_desc);
+	}
+}
+
+static void Ptrs_DOCK()
+{
+	Dock *d;
+	FOR_ALL_DOCKS(d) {
+		SlObject(d, _dock_desc);
+	}
+}
+
 extern const ChunkHandler _station_chunk_handlers[] = {
 	{ 'STNS', NULL,          Load_STNS,     Ptrs_STNS,     NULL, CH_ARRAY },
 	{ 'STNN', Save_STNN,     Load_STNN,     Ptrs_STNN,     NULL, CH_ARRAY },
-	{ 'ROAD', Save_ROADSTOP, Load_ROADSTOP, Ptrs_ROADSTOP, NULL, CH_ARRAY | CH_LAST},
+	{ 'ROAD', Save_ROADSTOP, Load_ROADSTOP, Ptrs_ROADSTOP, NULL, CH_ARRAY},
+	{ 'DOCK', Save_DOCK,     Load_DOCK,     Ptrs_DOCK,     NULL, CH_ARRAY | CH_LAST},
 };

src/script/api/ai/ai_station.hpp.sq

@@ -34,10 +34,10 @@ void SQAIStation_Register(Squirrel *engine)
 
 	ScriptError::RegisterErrorMap(STR_ERROR_TOO_CLOSE_TO_ANOTHER_AIRPORT,    ScriptStation::ERR_STATION_TOO_CLOSE_TO_ANOTHER_STATION);
 	ScriptError::RegisterErrorMap(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION,    ScriptStation::ERR_STATION_TOO_CLOSE_TO_ANOTHER_STATION);
-	ScriptError::RegisterErrorMap(STR_ERROR_TOO_CLOSE_TO_ANOTHER_DOCK,       ScriptStation::ERR_STATION_TOO_CLOSE_TO_ANOTHER_STATION);
 	ScriptError::RegisterErrorMap(STR_ERROR_TOO_MANY_STATIONS_LOADING,       ScriptStation::ERR_STATION_TOO_MANY_STATIONS);
 	ScriptError::RegisterErrorMap(STR_ERROR_TOO_MANY_TRUCK_STOPS,            ScriptStation::ERR_STATION_TOO_MANY_STATIONS);
 	ScriptError::RegisterErrorMap(STR_ERROR_TOO_MANY_BUS_STOPS,              ScriptStation::ERR_STATION_TOO_MANY_STATIONS);
+	ScriptError::RegisterErrorMap(STR_ERROR_TOO_MANY_DOCKS,                  ScriptStation::ERR_STATION_TOO_MANY_STATIONS);
 	ScriptError::RegisterErrorMap(STR_ERROR_LOCAL_AUTHORITY_REFUSES_AIRPORT, ScriptStation::ERR_STATION_TOO_MANY_STATIONS_IN_TOWN);
 
 	ScriptError::RegisterErrorMapString(ScriptStation::ERR_STATION_TOO_CLOSE_TO_ANOTHER_STATION, "ERR_STATION_TOO_CLOSE_TO_ANOTHER_STATION");

src/script/api/game/game_station.hpp.sq

@@ -34,10 +34,10 @@ void SQGSStation_Register(Squirrel *engine)
 
 	ScriptError::RegisterErrorMap(STR_ERROR_TOO_CLOSE_TO_ANOTHER_AIRPORT,    ScriptStation::ERR_STATION_TOO_CLOSE_TO_ANOTHER_STATION);
 	ScriptError::RegisterErrorMap(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION,    ScriptStation::ERR_STATION_TOO_CLOSE_TO_ANOTHER_STATION);
-	ScriptError::RegisterErrorMap(STR_ERROR_TOO_CLOSE_TO_ANOTHER_DOCK,       ScriptStation::ERR_STATION_TOO_CLOSE_TO_ANOTHER_STATION);
 	ScriptError::RegisterErrorMap(STR_ERROR_TOO_MANY_STATIONS_LOADING,       ScriptStation::ERR_STATION_TOO_MANY_STATIONS);
 	ScriptError::RegisterErrorMap(STR_ERROR_TOO_MANY_TRUCK_STOPS,            ScriptStation::ERR_STATION_TOO_MANY_STATIONS);
 	ScriptError::RegisterErrorMap(STR_ERROR_TOO_MANY_BUS_STOPS,              ScriptStation::ERR_STATION_TOO_MANY_STATIONS);
+	ScriptError::RegisterErrorMap(STR_ERROR_TOO_MANY_DOCKS,                  ScriptStation::ERR_STATION_TOO_MANY_STATIONS);
 	ScriptError::RegisterErrorMap(STR_ERROR_LOCAL_AUTHORITY_REFUSES_AIRPORT, ScriptStation::ERR_STATION_TOO_MANY_STATIONS_IN_TOWN);
 
 	ScriptError::RegisterErrorMapString(ScriptStation::ERR_STATION_TOO_CLOSE_TO_ANOTHER_STATION, "ERR_STATION_TOO_CLOSE_TO_ANOTHER_STATION");

src/script/api/script_order.cpp

@@ -17,6 +17,7 @@
 #include "../../debug.h"
 #include "../../vehicle_base.h"
 #include "../../roadstop_base.h"
+#include "../../dock_base.h"
 #include "../../depot_base.h"
 #include "../../station_base.h"
 #include "../../waypoint_base.h"
@@ -260,8 +261,8 @@ static int ScriptOrderPositionToRealOrderPosition(VehicleID vehicle_id, ScriptOr
 				TILE_AREA_LOOP(t, st->train_station) {
 					if (st->TileBelongsToRailStation(t)) return t;
 				}
-			} else if (st->dock_tile != INVALID_TILE) {
+			} else if (st->docks != NULL) {
-				return st->dock_tile;
+				return st->docks->flat;
 			} else if (st->bus_stops != NULL) {
 				return st->bus_stops->xy;
 			} else if (st->truck_stops != NULL) {

src/script/api/script_station.hpp

@@ -30,10 +30,10 @@ public:
 		ERR_STATION_BASE = ScriptError::ERR_CAT_STATION << ScriptError::ERR_CAT_BIT_SIZE,
 
 		/** The station is build too close to another station, airport or dock */
-		ERR_STATION_TOO_CLOSE_TO_ANOTHER_STATION, // [STR_ERROR_TOO_CLOSE_TO_ANOTHER_AIRPORT, STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION, STR_ERROR_TOO_CLOSE_TO_ANOTHER_DOCK]
+		ERR_STATION_TOO_CLOSE_TO_ANOTHER_STATION, // [STR_ERROR_TOO_CLOSE_TO_ANOTHER_AIRPORT, STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION]
 
 		/** There are too many stations, airports and docks in the game */
-		ERR_STATION_TOO_MANY_STATIONS,            // [STR_ERROR_TOO_MANY_STATIONS_LOADING, STR_ERROR_TOO_MANY_TRUCK_STOPS, STR_ERROR_TOO_MANY_BUS_STOPS]
+		ERR_STATION_TOO_MANY_STATIONS,            // [STR_ERROR_TOO_MANY_STATIONS_LOADING, STR_ERROR_TOO_MANY_TRUCK_STOPS, STR_ERROR_TOO_MANY_BUS_STOPS, STR_ERROR_TOO_MANY_DOCKS]
 
 		/** There are too many stations, airports of docks in a town */
 		ERR_STATION_TOO_MANY_STATIONS_IN_TOWN,    // [STR_ERROR_LOCAL_AUTHORITY_REFUSES_AIRPORT]

src/ship_cmd.cpp

@@ -11,6 +11,7 @@
 
 #include "stdafx.h"
 #include "ship.h"
+#include "dock_base.h"
 #include "landscape.h"
 #include "timetable.h"
 #include "news_func.h"
@@ -285,13 +286,50 @@ void Ship::PlayLeaveStationSound() const
 	PlayShipSound(this);
 }
 
+/**
+ * Of all the docks a station has, return the best destination for a ship.
+ * @param v The ship.
+ * @param st Station the ship \a v is heading for.
+ * @return The free and closest (if none is free, just closest) dock of station \a st to ship \a v.
+ */
+const Dock* GetBestDock(const Ship *v, const Station *st)
+{
+	assert(st != NULL && st->HasFacilities(FACIL_DOCK) && st->docks != NULL);
+	if (st->docks->next == NULL) return st->docks;
+
+	Dock *best_dock = NULL;
+	uint best_distance = UINT_MAX;
+
+	for (Dock *dock = st->docks; dock != NULL; dock = dock->next) {
+		uint new_distance = DistanceManhattan(v->tile, dock->flat);
+
+		if (new_distance < best_distance) {
+			best_dock = dock;
+			best_distance = new_distance;
+		}
+	}
+
+	assert(best_dock != NULL);
+
+	return best_dock;
+}
+
 TileIndex Ship::GetOrderStationLocation(StationID station)
 {
 	if (station == this->last_station_visited) this->last_station_visited = INVALID_STATION;
 
 	const Station *st = Station::Get(station);
-	if (st->dock_tile != INVALID_TILE) {
+	if (st->HasFacilities(FACIL_DOCK)) {
-		return TILE_ADD(st->dock_tile, ToTileIndexDiff(GetDockOffset(st->dock_tile)));
+		if (st->docks == NULL) {
+			return st->xy; // A buoy
+		} else {
+			const Dock* dock = GetBestDock(this, st);
+
+			DiagDirection direction = GetInclinedSlopeDirection(GetTileSlope(dock->sloped));
+			direction = ReverseDiagDir(direction);
+
+			return dock->flat + TileOffsByDiagDir(direction);
+		}
 	} else {
 		this->IncrementRealOrderIndex();
 		return 0;

src/station.cpp

@@ -22,6 +22,7 @@
 #include "core/pool_func.hpp"
 #include "station_base.h"
 #include "roadstop_base.h"
+#include "dock_base.h"
 #include "industry.h"
 #include "core/random_func.hpp"
 #include "linkgraph/linkgraph.h"
@@ -59,7 +60,7 @@ Station::Station(TileIndex tile) :
 	SpecializedStation<Station, false>(tile),
 	bus_station(INVALID_TILE, 0, 0),
 	truck_station(INVALID_TILE, 0, 0),
-	dock_tile(INVALID_TILE),
+	dock_station(INVALID_TILE, 0, 0),
 	indtype(IT_INVALID),
 	time_since_load(255),
 	time_since_unload(255),
@@ -280,10 +281,10 @@ uint Station::GetCatchmentRadius() const
 		if (this->bus_stops          != NULL)         ret = max<uint>(ret, CA_BUS);
 		if (this->truck_stops        != NULL)         ret = max<uint>(ret, CA_TRUCK);
 		if (this->train_station.tile != INVALID_TILE) ret = max<uint>(ret, CA_TRAIN);
-		if (this->dock_tile          != INVALID_TILE) ret = max<uint>(ret, CA_DOCK);
+		if (this->docks              != NULL)         ret = max<uint>(ret, CA_DOCK);
 		if (this->airport.tile       != INVALID_TILE) ret = max<uint>(ret, this->airport.GetSpec()->catchment);
 	} else {
-		if (this->bus_stops != NULL || this->truck_stops != NULL || this->train_station.tile != INVALID_TILE || this->dock_tile != INVALID_TILE || this->airport.tile != INVALID_TILE) {
+		if (this->bus_stops != NULL || this->truck_stops != NULL || this->train_station.tile != INVALID_TILE || this->docks != NULL || this->airport.tile != INVALID_TILE) {
 			ret = CA_UNMODIFIED;
 		}
 	}

src/station_base.h

@@ -458,9 +458,10 @@ public:
 	TileArea bus_station;   ///< Tile area the bus 'station' part covers
 	RoadStop *truck_stops;  ///< All the truck stops
 	TileArea truck_station; ///< Tile area the truck 'station' part covers
+	Dock *docks;            ///< All the docks
+	TileArea dock_station;  ///< Tile area dock 'station' part covers
 
 	Airport airport;        ///< Tile area the airport covers
-	TileIndex dock_tile;    ///< The location of the dock
 
 	IndustryType indtype;   ///< Industry type to get the name from
 
@@ -490,6 +491,8 @@ public:
 	void RecomputeIndustriesNear();
 	static void RecomputeIndustriesNearForAll();
 
+	Dock *GetPrimaryDock() const { return docks; }
+
 	uint GetCatchmentRadius() const;
 	Rect GetCatchmentRectUsingRadius(uint radius) const;
 	inline Rect GetCatchmentRect() const

src/station_cmd.cpp

@@ -38,6 +38,7 @@
 #include "elrail_func.h"
 #include "station_base.h"
 #include "roadstop_base.h"
+#include "dock_base.h"
 #include "newgrf_railtype.h"
 #include "waypoint_base.h"
 #include "waypoint_func.h"
@@ -399,7 +400,7 @@ void Station::GetTileArea(TileArea *ta, StationType type) const
 
 		case STATION_DOCK:
 		case STATION_OILRIG:
-			ta->tile = this->dock_tile;
+			*ta = this->dock_station;
 			break;
 
 		default: NOT_REACHED();
@@ -2599,41 +2600,43 @@ CommandCost CmdBuildDock(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32
 
 	if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
 
-	DiagDirection direction = GetInclinedSlopeDirection(GetTileSlope(tile));
+	TileIndex slope_tile = tile;
+
+	DiagDirection direction = GetInclinedSlopeDirection(GetTileSlope(slope_tile));
 	if (direction == INVALID_DIAGDIR) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
 	direction = ReverseDiagDir(direction);
 
+	TileIndex flat_tile = slope_tile + TileOffsByDiagDir(direction);
+
 	/* Docks cannot be placed on rapids */
-	if (HasTileWaterGround(tile)) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
+	if (HasTileWaterGround(slope_tile)) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
 
-	CommandCost ret = CheckIfAuthorityAllowsNewStation(tile, flags);
+	CommandCost ret = CheckIfAuthorityAllowsNewStation(slope_tile, flags);
 	if (ret.Failed()) return ret;
 
-	if (IsBridgeAbove(tile)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
+	if (IsBridgeAbove(slope_tile)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
 
-	ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
+	ret = DoCommand(slope_tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
 	if (ret.Failed()) return ret;
 
-	TileIndex tile_cur = tile + TileOffsByDiagDir(direction);
+	if (!IsTileType(flat_tile, MP_WATER) || !IsTileFlat(flat_tile)) {
-
-	if (!IsTileType(tile_cur, MP_WATER) || !IsTileFlat(tile_cur)) {
 		return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
 	}
 
-	if (IsBridgeAbove(tile_cur)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
+	if (IsBridgeAbove(flat_tile)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
 
 	/* Get the water class of the water tile before it is cleared.*/
-	WaterClass wc = GetWaterClass(tile_cur);
+	WaterClass wc = GetWaterClass(flat_tile);
 
-	ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
+	ret = DoCommand(flat_tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
 	if (ret.Failed()) return ret;
 
-	tile_cur += TileOffsByDiagDir(direction);
+	TileIndex adjacent_tile = flat_tile + TileOffsByDiagDir(direction);
-	if (!IsTileType(tile_cur, MP_WATER) || !IsTileFlat(tile_cur)) {
+	if (!IsTileType(adjacent_tile, MP_WATER) || !IsTileFlat(adjacent_tile)) {
 		return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
 	}
 
-	TileArea dock_area = TileArea(tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
+	TileArea dock_area = TileArea(slope_tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
 			_dock_w_chk[direction], _dock_h_chk[direction]);
 
 	/* middle */
@@ -2644,14 +2647,20 @@ CommandCost CmdBuildDock(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32
 	/* Distant join */
 	if (st == NULL && distant_join) st = Station::GetIfValid(station_to_join);
 
+	if (!Dock::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_DOCKS);
+
 	ret = BuildStationPart(&st, flags, reuse, dock_area, STATIONNAMING_DOCK);
 	if (ret.Failed()) return ret;
 
-	if (st != NULL && st->dock_tile != INVALID_TILE) return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_DOCK);
-
 	if (flags & DC_EXEC) {
-		st->dock_tile = tile;
+		/* Create the dock and insert it into the list of docks. */
-		st->AddFacility(FACIL_DOCK, tile);
+		Dock *dock = new Dock(slope_tile, flat_tile);
+		dock->next = st->docks;
+		st->docks = dock;
+
+		st->dock_station.Add(slope_tile);
+		st->dock_station.Add(flat_tile);
+		st->AddFacility(FACIL_DOCK, slope_tile);
 
 		st->rect.BeforeAddRect(dock_area.tile, dock_area.w, dock_area.h, StationRect::ADD_TRY);
 
@@ -2663,7 +2672,7 @@ CommandCost CmdBuildDock(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32
 		Company::Get(st->owner)->infrastructure.station += 2;
 		DirtyCompanyInfrastructureWindows(st->owner);
 
-		MakeDock(tile, st->owner, st->index, direction, wc);
+		MakeDock(slope_tile, st->owner, st->index, direction, wc);
 
 		st->UpdateVirtCoord();
 		UpdateStationAcceptance(st, false);
@@ -2689,10 +2698,16 @@ static CommandCost RemoveDock(TileIndex tile, DoCommandFlag flags)
 	CommandCost ret = CheckOwnership(st->owner);
 	if (ret.Failed()) return ret;
 
-	TileIndex docking_location = TILE_ADD(st->dock_tile, ToTileIndexDiff(GetDockOffset(st->dock_tile)));
+	Dock *removing_dock = Dock::GetByTile(tile);
+	assert(removing_dock != NULL);
 
-	TileIndex tile1 = st->dock_tile;
+	TileIndex tile1 = removing_dock->sloped;
-	TileIndex tile2 = tile1 + TileOffsByDiagDir(GetDockDirection(tile1));
+	TileIndex tile2 = removing_dock->flat;
+
+	DiagDirection direction = GetInclinedSlopeDirection(GetTileSlope(removing_dock->sloped));
+	direction = ReverseDiagDir(direction);
+
+	TileIndex docking_location = removing_dock->flat + TileOffsByDiagDir(direction);
 
 	ret = EnsureNoVehicleOnGround(tile1);
 	if (ret.Succeeded()) ret = EnsureNoVehicleOnGround(tile2);
@@ -2700,6 +2715,26 @@ static CommandCost RemoveDock(TileIndex tile, DoCommandFlag flags)
 
 	if (flags & DC_EXEC) {
 		ZoningMarkDirtyStationCoverageArea(st);
+
+		st->catchment.AfterRemoveTile(tile1, CA_DOCK);
+		st->catchment.AfterRemoveTile(tile2, CA_DOCK);
+
+		if (st->docks == removing_dock) {
+			/* The first dock in the list is removed. */
+			st->docks = removing_dock->next;
+			/* Last dock is removed. */
+			if (st->docks == NULL) {
+				st->facilities &= ~FACIL_DOCK;
+			}
+		} else {
+			/* Tell the predecessor in the list to skip this dock. */
+			Dock *pred = st->docks;
+			while (pred->next != removing_dock) pred = pred->next;
+			pred->next = removing_dock->next;
+		}
+
+		delete removing_dock;
+
 		DoClearSquare(tile1);
 		MarkTileDirtyByTile(tile1);
 		MakeWaterKeepingClass(tile2, st->owner);
@@ -2707,8 +2742,11 @@ static CommandCost RemoveDock(TileIndex tile, DoCommandFlag flags)
 		st->rect.AfterRemoveTile(st, tile1);
 		st->rect.AfterRemoveTile(st, tile2);
 
-		st->dock_tile = INVALID_TILE;
+		st->dock_station.Clear();
-		st->facilities &= ~FACIL_DOCK;
+		for (Dock *dock = st->docks; dock != NULL; dock = dock->next) {
+			st->dock_station.Add(dock->flat);
+			st->dock_station.Add(dock->sloped);
+		}
 
 		Company::Get(st->owner)->infrastructure.station -= 2;
 		DirtyCompanyInfrastructureWindows(st->owner);
@@ -4028,8 +4066,17 @@ void BuildOilRig(TileIndex tile)
 	st->owner = OWNER_NONE;
 	st->airport.type = AT_OILRIG;
 	st->airport.Add(tile);
-	st->dock_tile = tile;
+	st->dock_station.tile = tile;
-	st->facilities = FACIL_AIRPORT | FACIL_DOCK;
+	st->facilities = FACIL_AIRPORT;
+
+	if (!Dock::CanAllocateItem()) {
+		DEBUG(misc, 0, "Can't allocate dock for oilrig at 0x%X, reverting to oilrig with airport only", tile);
+	} else {
+		st->docks = new Dock(tile, tile + ToTileIndexDiff({1, 0}));
+		st->dock_station.tile = tile;
+		st->facilities |= FACIL_DOCK;
+	}
+
 	st->build_date = _date;
 
 	st->rect.BeforeAddTile(tile, StationRect::ADD_FORCE);
@@ -4047,7 +4094,11 @@ void DeleteOilRig(TileIndex tile)
 
 	MakeWaterKeepingClass(tile, OWNER_NONE);
 
-	st->dock_tile = INVALID_TILE;
+	st->dock_station.tile = INVALID_TILE;
+	if (st->docks != NULL) {
+		delete st->docks;
+		st->docks = NULL;
+	}
 	st->airport.Clear();
 	st->facilities &= ~(FACIL_AIRPORT | FACIL_DOCK);
 	st->airport.flags = 0;

src/station_type.h

@@ -19,10 +19,12 @@
 
 typedef uint16 StationID;
 typedef uint16 RoadStopID;
+typedef uint16 DockID;
 
 struct BaseStation;
 struct Station;
 struct RoadStop;
+struct Dock;
 struct StationSpec;
 struct Waypoint;