(svn r8033) [cpp] - Prepare for merge from branches/cpp (all .c files renamed to .cpp)

1 files changed, 0 insertions, 3285 deletions

diff --git a/src/station_cmd.c b/src/station_cmd.c
deleted file mode 100644
index 21784c473..000000000
--- a/src/station_cmd.c
+++ /dev/null
@@ -1,3285 +0,0 @@
-/* $Id$ */
-
-/** @file station_cmd.c */
-
-#include "stdafx.h"
-#include "openttd.h"
-#include "bridge_map.h"
-#include "debug.h"
-#include "functions.h"
-#include "station_map.h"
-#include "table/sprites.h"
-#include "table/strings.h"
-#include "map.h"
-#include "tile.h"
-#include "station.h"
-#include "gfx.h"
-#include "window.h"
-#include "viewport.h"
-#include "command.h"
-#include "town.h"
-#include "vehicle.h"
-#include "news.h"
-#include "saveload.h"
-#include "economy.h"
-#include "player.h"
-#include "airport.h"
-#include "sprite.h"
-#include "depot.h"
-#include "train.h"
-#include "water_map.h"
-#include "industry_map.h"
-#include "newgrf_callbacks.h"
-#include "newgrf_station.h"
-#include "yapf/yapf.h"
-#include "date.h"
-
-typedef enum StationRectModes
-{
-	RECT_MODE_TEST = 0,
-	RECT_MODE_TRY,
-	RECT_MODE_FORCE
-} StationRectMode;
-
-static void StationRect_Init(Station *st);
-static bool StationRect_IsEmpty(Station *st);
-static bool StationRect_BeforeAddTile(Station *st, TileIndex tile, StationRectMode mode);
-static bool StationRect_BeforeAddRect(Station *st, TileIndex tile, int w, int h, StationRectMode mode);
-static bool StationRect_AfterRemoveTile(Station *st, TileIndex tile);
-static bool StationRect_AfterRemoveRect(Station *st, TileIndex tile, int w, int h);
-
-
-/**
- * Called if a new block is added to the station-pool
- */
-static void StationPoolNewBlock(uint start_item)
-{
-	Station *st;
-
-	/* We don't use FOR_ALL here, because FOR_ALL skips invalid items.
-	 *  TODO - This is just a temporary stage, this will be removed. */
-	for (st = GetStation(start_item); st != NULL; st = (st->index + 1U < GetStationPoolSize()) ? GetStation(st->index + 1U) : NULL) st->index = start_item++;
-}
-
-static void StationPoolCleanBlock(uint start_item, uint end_item)
-{
-	uint i;
-
-	for (i = start_item; i <= end_item; i++) {
-		Station *st = GetStation(i);
-		free(st->speclist);
-		st->speclist = NULL;
-	}
-}
-
-/**
- * Called if a new block is added to the roadstop-pool
- */
-static void RoadStopPoolNewBlock(uint start_item)
-{
-	RoadStop *rs;
-
-	/* We don't use FOR_ALL here, because FOR_ALL skips invalid items.
-	 * TODO - This is just a temporary stage, this will be removed. */
-	for (rs = GetRoadStop(start_item); rs != NULL; rs = (rs->index + 1U < GetRoadStopPoolSize()) ? GetRoadStop(rs->index + 1U) : NULL) rs->index = start_item++;
-}
-
-DEFINE_OLD_POOL(Station, Station, StationPoolNewBlock, StationPoolCleanBlock)
-DEFINE_OLD_POOL(RoadStop, RoadStop, RoadStopPoolNewBlock, NULL)
-
-
-extern void UpdateAirplanesOnNewStation(Station *st);
-
-static bool TileBelongsToRailStation(const Station *st, TileIndex tile)
-{
-	return IsTileType(tile, MP_STATION) && GetStationIndex(tile) == st->index && IsRailwayStation(tile);
-}
-
-void MarkStationTilesDirty(const Station *st)
-{
-	TileIndex tile = st->train_tile;
-	int w, h;
-
-	// XXX No station is recorded as 0, not INVALID_TILE...
-	if (tile == 0) return;
-
-	for (h = 0; h < st->trainst_h; h++) {
-		for (w = 0; w < st->trainst_w; w++) {
-			if (TileBelongsToRailStation(st, tile)) {
-				MarkTileDirtyByTile(tile);
-			}
-			tile += TileDiffXY(1, 0);
-		}
-		tile += TileDiffXY(-w, 1);
-	}
-}
-
-static void MarkStationDirty(const Station* st)
-{
-	if (st->sign.width_1 != 0) {
-		InvalidateWindowWidget(WC_STATION_VIEW, st->index, 1);
-
-		MarkAllViewportsDirty(
-			st->sign.left - 6,
-			st->sign.top,
-			st->sign.left + (st->sign.width_1 << 2) + 12,
-			st->sign.top + 48);
-	}
-}
-
-static void InitializeRoadStop(RoadStop *road_stop, RoadStop *previous, TileIndex tile, StationID index)
-{
-	road_stop->xy = tile;
-	road_stop->used = true;
-	road_stop->status = 3; //stop is free
-	road_stop->next = NULL;
-	road_stop->prev = previous;
-	road_stop->station = index;
-	road_stop->num_vehicles = 0;
-}
-
-RoadStop* GetPrimaryRoadStop(const Station* st, RoadStopType type)
-{
-	switch (type) {
-		case RS_BUS:   return st->bus_stops;
-		case RS_TRUCK: return st->truck_stops;
-		default: NOT_REACHED();
-	}
-
-	return NULL;
-}
-
-RoadStop* GetRoadStopByTile(TileIndex tile, RoadStopType type)
-{
-	const Station* st = GetStationByTile(tile);
-	RoadStop* rs;
-
-	for (rs = GetPrimaryRoadStop(st, type); rs->xy != tile; rs = rs->next) {
-		assert(rs->next != NULL);
-	}
-
-	return rs;
-}
-
-uint GetNumRoadStopsInStation(const Station* st, RoadStopType type)
-{
-	uint num = 0;
-	const RoadStop *rs;
-
-	assert(st != NULL);
-	for (rs = GetPrimaryRoadStop(st, type); rs != NULL; rs = rs->next) num++;
-
-	return num;
-}
-
-RoadStop *AllocateRoadStop(void)
-{
-	RoadStop *rs;
-
-	/* We don't use FOR_ALL here, because FOR_ALL skips invalid items.
-	 * TODO - This is just a temporary stage, this will be removed. */
-	for (rs = GetRoadStop(0); rs != NULL; rs = (rs->index + 1U < GetRoadStopPoolSize()) ? GetRoadStop(rs->index + 1U) : NULL) {
-		if (!IsValidRoadStop(rs)) {
-			RoadStopID index = rs->index;
-
-			memset(rs, 0, sizeof(*rs));
-			rs->index = index;
-
-			return rs;
-		}
-	}
-
-	/* Check if we can add a block to the pool */
-	if (AddBlockToPool(&_RoadStop_pool)) return AllocateRoadStop();
-
-	return NULL;
-}
-
-/* Calculate the radius of the station. Basicly it is the biggest
- *  radius that is available within the station */
-static uint FindCatchmentRadius(const Station* st)
-{
-	uint ret = 0;
-
-	if (st->bus_stops != NULL)   ret = max(ret, CA_BUS);
-	if (st->truck_stops != NULL) ret = max(ret, CA_TRUCK);
-	if (st->train_tile) ret = max(ret, CA_TRAIN);
-	if (st->dock_tile)  ret = max(ret, CA_DOCK);
-
-	if (st->airport_tile) {
-		switch (st->airport_type) {
-			case AT_OILRIG:        ret = max(ret, CA_AIR_OILPAD);   break;
-			case AT_SMALL:         ret = max(ret, CA_AIR_SMALL);    break;
-			case AT_HELIPORT:      ret = max(ret, CA_AIR_HELIPORT); break;
-			case AT_LARGE:         ret = max(ret, CA_AIR_LARGE);    break;
-			case AT_METROPOLITAN:  ret = max(ret, CA_AIR_METRO);    break;
-			case AT_INTERNATIONAL: ret = max(ret, CA_AIR_INTER);    break;
-			case AT_COMMUTER:      ret = max(ret, CA_AIR_COMMUTER); break;
-			case AT_HELIDEPOT:     ret = max(ret, CA_AIR_HELIDEPOT); break;
-			case AT_INTERCON:      ret = max(ret, CA_AIR_INTERCON); break;
-			case AT_HELISTATION:   ret = max(ret, CA_AIR_HELISTATION); break;
-		}
-	}
-
-	return ret;
-}
-
-#define CHECK_STATIONS_ERR ((Station*)-1)
-
-static Station* GetStationAround(TileIndex tile, int w, int h, StationID closest_station)
-{
-	// check around to see if there's any stations there
-	BEGIN_TILE_LOOP(tile_cur, w + 2, h + 2, tile - TileDiffXY(1, 1))
-		if (IsTileType(tile_cur, MP_STATION)) {
-			StationID t = GetStationIndex(tile_cur);
-			{
-				Station *st = GetStation(t);
-				// you cannot take control of an oilrig!!
-				if (st->airport_type == AT_OILRIG && st->facilities == (FACIL_AIRPORT|FACIL_DOCK))
-					continue;
-			}
-
-			if (closest_station == INVALID_STATION) {
-				closest_station = t;
-			} else if (closest_station != t) {
-				_error_message = STR_3006_ADJOINS_MORE_THAN_ONE_EXISTING;
-				return CHECK_STATIONS_ERR;
-			}
-		}
-	END_TILE_LOOP(tile_cur, w + 2, h + 2, tile - TileDiffXY(1, 1))
-	return (closest_station == INVALID_STATION) ? NULL : GetStation(closest_station);
-}
-
-static Station *AllocateStation(void)
-{
-	Station *st = NULL;
-
-	/* We don't use FOR_ALL here, because FOR_ALL skips invalid items.
-	 * TODO - This is just a temporary stage, this will be removed. */
-	for (st = GetStation(0); st != NULL; st = (st->index + 1U < GetStationPoolSize()) ? GetStation(st->index + 1U) : NULL) {
-		if (!IsValidStation(st)) {
-			StationID index = st->index;
-
-			memset(st, 0, sizeof(Station));
-			st->index = index;
-
-			return st;
-		}
-	}
-
-	/* Check if we can add a block to the pool */
-	if (AddBlockToPool(&_Station_pool)) return AllocateStation();
-
-	_error_message = STR_3008_TOO_MANY_STATIONS_LOADING;
-	return NULL;
-}
-
-
-/**
- * Counts the numbers of tiles matching a specific type in the area around
- * @param tile the center tile of the 'count area'
- * @param type the type of tile searched for
- * @param industry when type == MP_INDUSTRY, the type of the industry,
- *                 in all other cases this parameter is ignored
- * @result the noumber of matching tiles around
- */
-static int CountMapSquareAround(TileIndex tile, TileType type, IndustryType industry)
-{
-	TileIndex cur_tile;
-	int dx, dy;
-	int num = 0;
-
-	for (dx = -3; dx <= 3; dx++) {
-		for (dy = -3; dy <= 3; dy++) {
-			cur_tile = TILE_MASK(tile + TileDiffXY(dx, dy));
-
-			if (IsTileType(cur_tile, type)) {
-				switch (type) {
-					case MP_INDUSTRY:
-						if (GetIndustryType(cur_tile) == industry)
-							num++;
-						break;
-
-					case MP_WATER:
-						if (!IsWater(cur_tile))
-							break;
-						/* FALL THROUGH WHEN WATER TILE */
-					case MP_TREES:
-						num++;
-						break;
-
-					default:
-						break;
-				}
-			}
-		}
-	}
-
-	return num;
-}
-
-#define M(x) ((x) - STR_SV_STNAME)
-
-static bool GenerateStationName(Station *st, TileIndex tile, int flag)
-{
-	static const uint32 _gen_station_name_bits[] = {
-		0,                                      /* 0 */
-		1 << M(STR_SV_STNAME_AIRPORT),          /* 1 */
-		1 << M(STR_SV_STNAME_OILFIELD),         /* 2 */
-		1 << M(STR_SV_STNAME_DOCKS),            /* 3 */
-		0x1FF << M(STR_SV_STNAME_BUOY_1),       /* 4 */
-		1 << M(STR_SV_STNAME_HELIPORT),         /* 5 */
-	};
-
-	Town *t = st->town;
-	uint32 free_names = (uint32)-1;
-	int found;
-	uint z,z2;
-	unsigned long tmp;
-
-	{
-		Station *s;
-
-		FOR_ALL_STATIONS(s) {
-			if (s != st && s->town==t) {
-				uint str = M(s->string_id);
-				if (str <= 0x20) {
-					if (str == M(STR_SV_STNAME_FOREST))
-						str = M(STR_SV_STNAME_WOODS);
-					CLRBIT(free_names, str);
-				}
-			}
-		}
-	}
-
-	/* check default names */
-	tmp = free_names & _gen_station_name_bits[flag];
-	if (tmp != 0) {
-		found = FindFirstBit(tmp);
-		goto done;
-	}
-
-	/* check mine? */
-	if (HASBIT(free_names, M(STR_SV_STNAME_MINES))) {
-		if (CountMapSquareAround(tile, MP_INDUSTRY, IT_COAL_MINE) >= 2 ||
-				CountMapSquareAround(tile, MP_INDUSTRY, IT_IRON_MINE) >= 2 ||
-				CountMapSquareAround(tile, MP_INDUSTRY, IT_COPPER_MINE) >= 2 ||
-				CountMapSquareAround(tile, MP_INDUSTRY, IT_GOLD_MINE) >= 2 ||
-				CountMapSquareAround(tile, MP_INDUSTRY, IT_DIAMOND_MINE) >= 2) {
-			found = M(STR_SV_STNAME_MINES);
-			goto done;
-		}
-	}
-
-	/* check close enough to town to get central as name? */
-	if (DistanceMax(tile,t->xy) < 8) {
-		found = M(STR_SV_STNAME);
-		if (HASBIT(free_names, M(STR_SV_STNAME))) goto done;
-
-		found = M(STR_SV_STNAME_CENTRAL);
-		if (HASBIT(free_names, M(STR_SV_STNAME_CENTRAL))) goto done;
-	}
-
-	/* Check lakeside */
-	if (HASBIT(free_names, M(STR_SV_STNAME_LAKESIDE)) &&
-			DistanceFromEdge(tile) < 20 &&
-			CountMapSquareAround(tile, MP_WATER, 0) >= 5) {
-		found = M(STR_SV_STNAME_LAKESIDE);
-		goto done;
-	}
-
-	/* Check woods */
-	if (HASBIT(free_names, M(STR_SV_STNAME_WOODS)) && (
-				CountMapSquareAround(tile, MP_TREES, 0) >= 8 ||
-				CountMapSquareAround(tile, MP_INDUSTRY, IT_FOREST) >= 2)
-			) {
-		found = _opt.landscape == LT_DESERT ?
-			M(STR_SV_STNAME_FOREST) : M(STR_SV_STNAME_WOODS);
-		goto done;
-	}
-
-	/* check elevation compared to town */
-	z = GetTileZ(tile);
-	z2 = GetTileZ(t->xy);
-	if (z < z2) {
-		found = M(STR_SV_STNAME_VALLEY);
-		if (HASBIT(free_names, M(STR_SV_STNAME_VALLEY))) goto done;
-	} else if (z > z2) {
-		found = M(STR_SV_STNAME_HEIGHTS);
-		if (HASBIT(free_names, M(STR_SV_STNAME_HEIGHTS))) goto done;
-	}
-
-	/* check direction compared to town */
-	{
-		static const int8 _direction_and_table[] = {
-			~( (1<<M(STR_SV_STNAME_WEST)) | (1<<M(STR_SV_STNAME_EAST)) | (1<<M(STR_SV_STNAME_NORTH)) ),
-			~( (1<<M(STR_SV_STNAME_SOUTH)) | (1<<M(STR_SV_STNAME_WEST)) | (1<<M(STR_SV_STNAME_NORTH)) ),
-			~( (1<<M(STR_SV_STNAME_SOUTH)) | (1<<M(STR_SV_STNAME_EAST)) | (1<<M(STR_SV_STNAME_NORTH)) ),
-			~( (1<<M(STR_SV_STNAME_SOUTH)) | (1<<M(STR_SV_STNAME_WEST)) | (1<<M(STR_SV_STNAME_EAST)) ),
-		};
-
-		free_names &= _direction_and_table[
-			(TileX(tile) < TileX(t->xy)) +
-			(TileY(tile) < TileY(t->xy)) * 2];
-	}
-
-	tmp = free_names & ((1<<1)|(1<<2)|(1<<3)|(1<<4)|(1<<6)|(1<<7)|(1<<12)|(1<<26)|(1<<27)|(1<<28)|(1<<29)|(1<<30));
-	if (tmp == 0) {
-		_error_message = STR_3007_TOO_MANY_STATIONS_LOADING;
-		return false;
-	}
-	found = FindFirstBit(tmp);
-
-done:
-	st->string_id = found + STR_SV_STNAME;
-	return true;
-}
-#undef M
-
-static Station* GetClosestStationFromTile(TileIndex tile, uint threshold, PlayerID owner)
-{
-	Station* best_station = NULL;
-	Station* st;
-
-	FOR_ALL_STATIONS(st) {
-		if ((owner == PLAYER_SPECTATOR || st->owner == owner)) {
-			uint cur_dist = DistanceManhattan(tile, st->xy);
-
-			if (cur_dist < threshold) {
-				threshold = cur_dist;
-				best_station = st;
-			}
-		}
-	}
-
-	return best_station;
-}
-
-static void StationInitialize(Station *st, TileIndex tile)
-{
-	GoodsEntry *ge;
-
-	st->xy = tile;
-	st->airport_tile = st->dock_tile = st->train_tile = 0;
-	st->bus_stops = st->truck_stops = NULL;
-	st->had_vehicle_of_type = 0;
-	st->time_since_load = 255;
-	st->time_since_unload = 255;
-	st->delete_ctr = 0;
-	st->facilities = 0;
-
-	st->last_vehicle_type = VEH_Invalid;
-
-	for (ge = st->goods; ge != endof(st->goods); ge++) {
-		ge->waiting_acceptance = 0;
-		ge->days_since_pickup = 0;
-		ge->enroute_from = INVALID_STATION;
-		ge->rating = 175;
-		ge->last_speed = 0;
-		ge->last_age = 0xFF;
-		ge->feeder_profit = 0;
-	}
-
-	st->random_bits = Random();
-	st->waiting_triggers = 0;
-
-	StationRect_Init(st);
-}
-
-// Update the virtual coords needed to draw the station sign.
-// st = Station to update for.
-static void UpdateStationVirtCoord(Station *st)
-{
-	Point pt = RemapCoords2(TileX(st->xy) * TILE_SIZE, TileY(st->xy) * TILE_SIZE);
-
-	pt.y -= 32;
-	if (st->facilities & FACIL_AIRPORT && st->airport_type == AT_OILRIG) pt.y -= 16;
-
-	SetDParam(0, st->index);
-	SetDParam(1, st->facilities);
-	UpdateViewportSignPos(&st->sign, pt.x, pt.y, STR_305C_0);
-}
-
-// Update the virtual coords needed to draw the station sign for all stations.
-void UpdateAllStationVirtCoord(void)
-{
-	Station* st;
-
-	FOR_ALL_STATIONS(st) {
-		UpdateStationVirtCoord(st);
-	}
-}
-
-// Update the station virt coords while making the modified parts dirty.
-static void UpdateStationVirtCoordDirty(Station *st)
-{
-	MarkStationDirty(st);
-	UpdateStationVirtCoord(st);
-	MarkStationDirty(st);
-}
-
-// Get a mask of the cargo types that the station accepts.
-static uint GetAcceptanceMask(const Station *st)
-{
-	uint mask = 0;
-	uint i;
-
-	for (i = 0; i != NUM_CARGO; i++) {
-		if (st->goods[i].waiting_acceptance & 0x8000) mask |= 1 << i;
-	}
-	return mask;
-}
-
-// Items contains the two cargo names that are to be accepted or rejected.
-// msg is the string id of the message to display.
-static void ShowRejectOrAcceptNews(const Station *st, uint32 items, StringID msg)
-{
-	if (items) {
-		SetDParam(2, GB(items, 16, 16));
-		SetDParam(1, GB(items,  0, 16));
-		SetDParam(0, st->index);
-		AddNewsItem(msg + (GB(items, 16, 16) ? 1 : 0), NEWS_FLAGS(NM_SMALL, NF_VIEWPORT|NF_TILE, NT_ACCEPTANCE, 0), st->xy, 0);
-	}
-}
-
-// Get a list of the cargo types being produced around the tile.
-void GetProductionAroundTiles(AcceptedCargo produced, TileIndex tile,
-	int w, int h, int rad)
-{
-	int x,y;
-	int x1,y1,x2,y2;
-	int xc,yc;
-
-	memset(produced, 0, sizeof(AcceptedCargo));
-
-	x = TileX(tile);
-	y = TileY(tile);
-
-	// expand the region by rad tiles on each side
-	// while making sure that we remain inside the board.
-	x2 = min(x + w + rad, MapSizeX());
-	x1 = max(x - rad, 0);
-
-	y2 = min(y + h + rad, MapSizeY());
-	y1 = max(y - rad, 0);
-
-	assert(x1 < x2);
-	assert(y1 < y2);
-	assert(w > 0);
-	assert(h > 0);
-
-	for (yc = y1; yc != y2; yc++) {
-		for (xc = x1; xc != x2; xc++) {
-			if (!(IS_INSIDE_1D(xc, x, w) && IS_INSIDE_1D(yc, y, h))) {
-				GetProducedCargoProc *gpc;
-				TileIndex tile = TileXY(xc, yc);
-
-				gpc = _tile_type_procs[GetTileType(tile)]->get_produced_cargo_proc;
-				if (gpc != NULL) {
-					CargoID cargos[2] = { CT_INVALID, CT_INVALID };
-
-					gpc(tile, cargos);
-					if (cargos[0] != CT_INVALID) {
-						produced[cargos[0]]++;
-						if (cargos[1] != CT_INVALID) {
-							produced[cargos[1]]++;
-						}
-					}
-				}
-			}
-		}
-	}
-}
-
-// Get a list of the cargo types that are accepted around the tile.
-void GetAcceptanceAroundTiles(AcceptedCargo accepts, TileIndex tile,
-	int w, int h, int rad)
-{
-	int x,y;
-	int x1,y1,x2,y2;
-	int xc,yc;
-
-	memset(accepts, 0, sizeof(AcceptedCargo));
-
-	x = TileX(tile);
-	y = TileY(tile);
-
-	// expand the region by rad tiles on each side
-	// while making sure that we remain inside the board.
-	x2 = min(x + w + rad, MapSizeX());
-	y2 = min(y + h + rad, MapSizeY());
-	x1 = max(x - rad, 0);
-	y1 = max(y - rad, 0);
-
-	assert(x1 < x2);
-	assert(y1 < y2);
-	assert(w > 0);
-	assert(h > 0);
-
-	for (yc = y1; yc != y2; yc++) {
-		for (xc = x1; xc != x2; xc++) {
-			TileIndex tile = TileXY(xc, yc);
-
-			if (!IsTileType(tile, MP_STATION)) {
-				AcceptedCargo ac;
-				uint i;
-
-				GetAcceptedCargo(tile, ac);
-				for (i = 0; i < lengthof(ac); ++i) accepts[i] += ac[i];
-			}
-		}
-	}
-}
-
-typedef struct ottd_Rectangle {
-	uint min_x;
-	uint min_y;
-	uint max_x;
-	uint max_y;
-} ottd_Rectangle;
-
-static inline void MergePoint(ottd_Rectangle* rect, TileIndex tile)
-{
-	uint x = TileX(tile);
-	uint y = TileY(tile);
-
-	if (rect->min_x > x) rect->min_x = x;
-	if (rect->min_y > y) rect->min_y = y;
-	if (rect->max_x < x) rect->max_x = x;
-	if (rect->max_y < y) rect->max_y = y;
-}
-
-// Update the acceptance for a station.
-// show_msg controls whether to display a message that acceptance was changed.
-static void UpdateStationAcceptance(Station *st, bool show_msg)
-{
-	uint old_acc, new_acc;
-	const RoadStop *cur_rs;
-	int i;
-	ottd_Rectangle rect;
-	int rad;
-	AcceptedCargo accepts;
-
-	rect.min_x = MapSizeX();
-	rect.min_y = MapSizeY();
-	rect.max_x = rect.max_y = 0;
-	// Don't update acceptance for a buoy
-	if (IsBuoy(st)) return;
-
-	/* old accepted goods types */
-	old_acc = GetAcceptanceMask(st);
-
-	// Put all the tiles that span an area in the table.
-	if (st->train_tile != 0) {
-		MergePoint(&rect, st->train_tile);
-		MergePoint(&rect,
-			st->train_tile + TileDiffXY(st->trainst_w - 1, st->trainst_h - 1)
-		);
-	}
-
-	if (st->airport_tile != 0) {
-		const AirportFTAClass* afc = GetAirport(st->airport_type);
-
-		MergePoint(&rect, st->airport_tile);
-		MergePoint(&rect,
-			st->airport_tile + TileDiffXY(afc->size_x - 1, afc->size_y - 1)
-		);
-	}
-
-	if (st->dock_tile != 0) MergePoint(&rect, st->dock_tile);
-
-	for (cur_rs = st->bus_stops; cur_rs != NULL; cur_rs = cur_rs->next) {
-		MergePoint(&rect, cur_rs->xy);
-	}
-
-	for (cur_rs = st->truck_stops; cur_rs != NULL; cur_rs = cur_rs->next) {
-		MergePoint(&rect, cur_rs->xy);
-	}
-
-	rad = (_patches.modified_catchment) ? FindCatchmentRadius(st) : 4;
-
-	// And retrieve the acceptance.
-	if (rect.max_x >= rect.min_x) {
-		GetAcceptanceAroundTiles(
-			accepts,
-			TileXY(rect.min_x, rect.min_y),
-			rect.max_x - rect.min_x + 1,
-			rect.max_y - rect.min_y + 1,
-			rad
-		);
-	} else {
-		memset(accepts, 0, sizeof(accepts));
-	}
-
-	// Adjust in case our station only accepts fewer kinds of goods
-	for (i = 0; i != NUM_CARGO; i++) {
-		uint amt = min(accepts[i], 15);
-
-		// Make sure the station can accept the goods type.
-		if ((i != CT_PASSENGERS && !(st->facilities & (byte)~FACIL_BUS_STOP)) ||
-				(i == CT_PASSENGERS && !(st->facilities & (byte)~FACIL_TRUCK_STOP)))
-			amt = 0;
-
-		SB(st->goods[i].waiting_acceptance, 12, 4, amt);
-	}
-
-	// Only show a message in case the acceptance was actually changed.
-	new_acc = GetAcceptanceMask(st);
-	if (old_acc == new_acc)
-		return;
-
-	// show a message to report that the acceptance was changed?
-	if (show_msg && st->owner == _local_player && st->facilities) {
-		uint32 accept=0, reject=0; /* these contain two string ids each */
-		const StringID *str = _cargoc.names_s;
-
-		do {
-			if (new_acc & 1) {
-				if (!(old_acc & 1)) accept = (accept << 16) | *str;
-			} else {
-				if (old_acc & 1) reject = (reject << 16) | *str;
-			}
-		} while (str++,(new_acc>>=1) != (old_acc>>=1));
-
-		ShowRejectOrAcceptNews(st, accept, STR_3040_NOW_ACCEPTS);
-		ShowRejectOrAcceptNews(st, reject, STR_303E_NO_LONGER_ACCEPTS);
-	}
-
-	// redraw the station view since acceptance changed
-	InvalidateWindowWidget(WC_STATION_VIEW, st->index, 4);
-}
-
-static void UpdateStationSignCoord(Station *st)
-{
-	Rect *r = &st->rect;
-
-	if (StationRect_IsEmpty(st)) return; // no tiles belong to this station
-
-	// clamp sign coord to be inside the station rect
-	st->xy = TileXY(clampu(TileX(st->xy), r->left, r->right), clampu(TileY(st->xy), r->top, r->bottom));
-	UpdateStationVirtCoordDirty(st);
-}
-
-// This is called right after a station was deleted.
-// It checks if the whole station is free of substations, and if so, the station will be
-// deleted after a little while.
-static void DeleteStationIfEmpty(Station* st)
-{
-	if (st->facilities == 0) {
-		st->delete_ctr = 0;
-		RebuildStationLists();
-		InvalidateWindow(WC_STATION_LIST, st->owner);
-	}
-	/* station remains but it probably lost some parts - station sign should stay in the station boundaries */
-	UpdateStationSignCoord(st);
-}
-
-static int32 ClearTile_Station(TileIndex tile, byte flags);
-
-// Tries to clear the given area. Returns the cost in case of success.
-// Or an error code if it failed.
-int32 CheckFlatLandBelow(TileIndex tile, uint w, uint h, uint flags, uint invalid_dirs, StationID* station)
-{
-	int32 cost = 0, ret;
-
-	Slope tileh;
-	uint z;
-	int allowed_z = -1;
-	int flat_z;
-
-	BEGIN_TILE_LOOP(tile_cur, w, h, tile)
-		if (MayHaveBridgeAbove(tile_cur) && IsBridgeAbove(tile_cur)) {
-			return_cmd_error(STR_5007_MUST_DEMOLISH_BRIDGE_FIRST);
-		}
-
-		if (!EnsureNoVehicle(tile_cur)) return CMD_ERROR;
-
-		tileh = GetTileSlope(tile_cur, &z);
-
-		/* Prohibit building if
-		 *   1) The tile is "steep" (i.e. stretches two height levels)
-		 * -OR-
-		 *   2) The tile is non-flat if
-		 *     a) the player building is an "old-school" AI
-		 *   -OR-
-		 *     b) the build_on_slopes switch is disabled
-		 */
-		if (IsSteepSlope(tileh) ||
-				((_is_old_ai_player || !_patches.build_on_slopes) && tileh != SLOPE_FLAT)) {
-			return_cmd_error(STR_0007_FLAT_LAND_REQUIRED);
-		}
-
-		flat_z = z;
-		if (tileh != SLOPE_FLAT) {
-			// need to check so the entrance to the station is not pointing at a slope.
-			if ((invalid_dirs&1 && !(tileh & SLOPE_NE) && (uint)w_cur == w) ||
-					(invalid_dirs&2 && !(tileh & SLOPE_SE) && h_cur == 1) ||
-					(invalid_dirs&4 && !(tileh & SLOPE_SW) && w_cur == 1) ||
-					(invalid_dirs&8 && !(tileh & SLOPE_NW) && (uint)h_cur == h)) {
-				return_cmd_error(STR_0007_FLAT_LAND_REQUIRED);
-			}
-			cost += _price.terraform;
-			flat_z += TILE_HEIGHT;
-		}
-
-		// get corresponding flat level and make sure that all parts of the station have the same level.
-		if (allowed_z == -1) {
-			// first tile
-			allowed_z = flat_z;
-		} else if (allowed_z != flat_z) {
-			return_cmd_error(STR_0007_FLAT_LAND_REQUIRED);
-		}
-
-		// if station is set, then we have special handling to allow building on top of already existing stations.
-		// so station points to INVALID_STATION if we can build on any station. or it points to a station if we're only allowed to build
-		// on exactly that station.
-		if (station != NULL && IsTileType(tile_cur, MP_STATION)) {
-			if (!IsRailwayStation(tile_cur)) {
-				return ClearTile_Station(tile_cur, DC_AUTO); // get error message
-			} else {
-				StationID st = GetStationIndex(tile_cur);
-				if (*station == INVALID_STATION) {
-					*station = st;
-				} else if (*station != st) {
-					return_cmd_error(STR_3006_ADJOINS_MORE_THAN_ONE_EXISTING);
-				}
-			}
-		} else {
-			ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
-			if (CmdFailed(ret)) return ret;
-			cost += ret;
-		}
-	END_TILE_LOOP(tile_cur, w, h, tile)
-
-	return cost;
-}
-
-static bool CanExpandRailroadStation(Station* st, uint* fin, Axis axis)
-{
-	uint curw = st->trainst_w, curh = st->trainst_h;
-	TileIndex tile = fin[0];
-	uint w = fin[1];
-	uint h = fin[2];
-
-	if (_patches.nonuniform_stations) {
-		// determine new size of train station region..
-		int x = min(TileX(st->train_tile), TileX(tile));
-		int y = min(TileY(st->train_tile), TileY(tile));
-		curw = max(TileX(st->train_tile) + curw, TileX(tile) + w) - x;
-		curh = max(TileY(st->train_tile) + curh, TileY(tile) + h) - y;
-		tile = TileXY(x, y);
-	} else {
-		// check so the orientation is the same
-		if (GetRailStationAxis(st->train_tile) != axis) {
-			_error_message = STR_306D_NONUNIFORM_STATIONS_DISALLOWED;
-			return false;
-		}
-
-		// check if the new station adjoins the old station in either direction
-		if (curw == w && st->train_tile == tile + TileDiffXY(0, h)) {
-			// above
-			curh += h;
-		} else if (curw == w && st->train_tile == tile - TileDiffXY(0, curh)) {
-			// below
-			tile -= TileDiffXY(0, curh);
-			curh += h;
-		} else if (curh == h && st->train_tile == tile + TileDiffXY(w, 0)) {
-			// to the left
-			curw += w;
-		} else if (curh == h && st->train_tile == tile - TileDiffXY(curw, 0)) {
-			// to the right
-			tile -= TileDiffXY(curw, 0);
-			curw += w;
-		} else {
-			_error_message = STR_306D_NONUNIFORM_STATIONS_DISALLOWED;
-			return false;
-		}
-	}
-	// make sure the final size is not too big.
-	if (curw > _patches.station_spread || curh > _patches.station_spread) {
-		_error_message = STR_306C_STATION_TOO_SPREAD_OUT;
-		return false;
-	}
-
-	// now tile contains the new value for st->train_tile
-	// curw, curh contain the new value for width and height
-	fin[0] = tile;
-	fin[1] = curw;
-	fin[2] = curh;
-	return true;
-}
-
-static inline byte *CreateSingle(byte *layout, int n)
-{
-	int i = n;
-	do *layout++ = 0; while (--i);
-	layout[((n-1) >> 1)-n] = 2;
-	return layout;
-}
-
-static inline byte *CreateMulti(byte *layout, int n, byte b)
-{
-	int i = n;
-	do *layout++ = b; while (--i);
-	if (n > 4) {
-		layout[0-n] = 0;
-		layout[n-1-n] = 0;
-	}
-	return layout;
-}
-
-static void GetStationLayout(byte *layout, int numtracks, int plat_len, const StationSpec *statspec)
-{
-	if (statspec != NULL && statspec->lengths >= plat_len &&
-			statspec->platforms[plat_len - 1] >= numtracks &&
-			statspec->layouts[plat_len - 1][numtracks - 1]) {
-		/* Custom layout defined, follow it. */
-		memcpy(layout, statspec->layouts[plat_len - 1][numtracks - 1],
-			plat_len * numtracks);
-		return;
-	}
-
-	if (plat_len == 1) {
-		CreateSingle(layout, numtracks);
-	} else {
-		if (numtracks & 1) layout = CreateSingle(layout, plat_len);
-		numtracks >>= 1;
-
-		while (--numtracks >= 0) {
-			layout = CreateMulti(layout, plat_len, 4);
-			layout = CreateMulti(layout, plat_len, 6);
-		}
-	}
-}
-
-/** Build railroad station
- * @param tile_org starting position of station dragging/placement
- * @param p1 various bitstuffed elements
- * - p1 = (bit  0)    - orientation (p1 & 1)
- * - p1 = (bit  8-15) - number of tracks
- * - p1 = (bit 16-23) - platform length
- * @param p2 various bitstuffed elements
- * - p2 = (bit  0- 3) - railtype (p2 & 0xF)
- * - p2 = (bit  8-15) - custom station class
- * - p2 = (bit 16-23) - custom station id
- */
-int32 CmdBuildRailroadStation(TileIndex tile_org, uint32 flags, uint32 p1, uint32 p2)
-{
-	Station *st;
-	int w_org, h_org;
-	int32 cost, ret;
-	StationID est;
-	int plat_len, numtracks;
-	Axis axis;
-	uint finalvalues[3];
-	const StationSpec *statspec;
-	int specindex;
-
-	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
-
-	/* Does the authority allow this? */
-	if (!(flags & DC_NO_TOWN_RATING) && !CheckIfAuthorityAllows(tile_org)) return CMD_ERROR;
-	if (!ValParamRailtype(p2 & 0xF)) return CMD_ERROR;
-
-	/* unpack parameters */
-	axis = p1 & 1;
-	numtracks = GB(p1,  8, 8);
-	plat_len  = GB(p1, 16, 8);
-	/* w = length, h = num_tracks */
-	if (axis == AXIS_X) {
-		w_org = plat_len;
-		h_org = numtracks;
-	} else {
-		h_org = plat_len;
-		w_org = numtracks;
-	}
-
-	if (h_org > _patches.station_spread || w_org > _patches.station_spread) return CMD_ERROR;
-
-	// these values are those that will be stored in train_tile and station_platforms
-	finalvalues[0] = tile_org;
-	finalvalues[1] = w_org;
-	finalvalues[2] = h_org;
-
-	// Make sure the area below consists of clear tiles. (OR tiles belonging to a certain rail station)
-	est = INVALID_STATION;
-	// If DC_EXEC is in flag, do not want to pass it to CheckFlatLandBelow, because of a nice bug
-	//  for detail info, see: https://sourceforge.net/tracker/index.php?func=detail&aid=1029064&group_id=103924&atid=636365
-	ret = CheckFlatLandBelow(tile_org, w_org, h_org, flags & ~DC_EXEC, 5 << axis, _patches.nonuniform_stations ? &est : NULL);
-	if (CmdFailed(ret)) return ret;
-	cost = ret + (numtracks * _price.train_station_track + _price.train_station_length) * plat_len;
-
-	// Make sure there are no similar stations around us.
-	st = GetStationAround(tile_org, w_org, h_org, est);
-	if (st == CHECK_STATIONS_ERR) return CMD_ERROR;
-
-	// See if there is a deleted station close to us.
-	if (st == NULL) {
-		st = GetClosestStationFromTile(tile_org, 8, _current_player);
-		if (st != NULL && st->facilities) st = NULL;
-	}
-
-	if (st != NULL) {
-		// Reuse an existing station.
-		if (st->owner != OWNER_NONE && st->owner != _current_player)
-			return_cmd_error(STR_3009_TOO_CLOSE_TO_ANOTHER_STATION);
-
-		if (st->train_tile != 0) {
-			// check if we want to expanding an already existing station?
-			if (_is_old_ai_player || !_patches.join_stations)
-				return_cmd_error(STR_3005_TOO_CLOSE_TO_ANOTHER_RAILROAD);
-			if (!CanExpandRailroadStation(st, finalvalues, axis))
-				return CMD_ERROR;
-		}
-
-		//XXX can't we pack this in the "else" part of the if above?
-		if (!StationRect_BeforeAddRect(st, tile_org, w_org, h_org, RECT_MODE_TEST)) return CMD_ERROR;
-	} else {
-		// Create a new station
-		st = AllocateStation();
-		if (st == NULL) return CMD_ERROR;
-
-		st->town = ClosestTownFromTile(tile_org, (uint)-1);
-		if (IsValidPlayer(_current_player) && (flags & DC_EXEC))
-			SETBIT(st->town->have_ratings, _current_player);
-
-		if (!GenerateStationName(st, tile_org, 0)) return CMD_ERROR;
-
-		if (flags & DC_EXEC) StationInitialize(st, tile_org);
-	}
-
-	/* Check if the given station class is valid */
-	if (GB(p2, 8, 8) >= STAT_CLASS_MAX) return CMD_ERROR;
-
-	/* Check if we can allocate a custom stationspec to this station */
-	statspec = GetCustomStationSpec(GB(p2, 8, 8), GB(p2, 16, 8));
-	specindex = AllocateSpecToStation(statspec, st, flags & DC_EXEC);
-	if (specindex == -1) return CMD_ERROR;
-
-	if (statspec != NULL) {
-		/* Perform NewStation checks */
-
-		/* Check if the station size is permitted */
-		if (HASBIT(statspec->disallowed_platforms, numtracks - 1) || HASBIT(statspec->disallowed_lengths, plat_len - 1)) {
-			return CMD_ERROR;
-		}
-
-		/* Check if the station is buildable */
-		if (HASBIT(statspec->callbackmask, CBM_STATION_AVAIL) && GetStationCallback(CBID_STATION_AVAILABILITY, 0, 0, statspec, NULL, INVALID_TILE) == 0) {
-			return CMD_ERROR;
-		}
-	}
-
-	if (flags & DC_EXEC) {
-		TileIndexDiff tile_delta;
-		byte *layout_ptr;
-		byte numtracks_orig;
-		Track track;
-
-		// Now really clear the land below the station
-		// It should never return CMD_ERROR.. but you never know ;)
-		//  (a bit strange function name for it, but it really does clear the land, when DC_EXEC is in flags)
-		ret = CheckFlatLandBelow(tile_org, w_org, h_org, flags, 5 << axis, _patches.nonuniform_stations ? &est : NULL);
-		if (CmdFailed(ret)) return ret;
-
-		st->train_tile = finalvalues[0];
-		if (!st->facilities) st->xy = finalvalues[0];
-		st->facilities |= FACIL_TRAIN;
-		st->owner = _current_player;
-
-		st->trainst_w = finalvalues[1];
-		st->trainst_h = finalvalues[2];
-
-		st->build_date = _date;
-
-		StationRect_BeforeAddRect(st, tile_org, w_org, h_org, RECT_MODE_TRY);
-
-		tile_delta = (axis == AXIS_X ? TileDiffXY(1, 0) : TileDiffXY(0, 1));
-		track = AxisToTrack(axis);
-
-		layout_ptr = alloca(numtracks * plat_len);
-		GetStationLayout(layout_ptr, numtracks, plat_len, statspec);
-
-		numtracks_orig = numtracks;
-
-		do {
-			TileIndex tile = tile_org;
-			int w = plat_len;
-			do {
-				byte layout = *layout_ptr++;
-				MakeRailStation(tile, st->owner, st->index, axis, layout, GB(p2, 0, 4));
-				SetCustomStationSpecIndex(tile, specindex);
-				SetStationTileRandomBits(tile, GB(Random(), 0, 4));
-
-				if (statspec != NULL) {
-					/* Use a fixed axis for GetPlatformInfo as our platforms / numtracks are always the right way around */
-					uint32 platinfo = GetPlatformInfo(AXIS_X, 0, plat_len, numtracks_orig, plat_len - w, numtracks_orig - numtracks, false);
-					uint16 callback = GetStationCallback(CBID_STATION_TILE_LAYOUT, platinfo, 0, statspec, st, tile);
-					if (callback != CALLBACK_FAILED && callback < 8) SetStationGfx(tile, callback + axis);
-				}
-
-				tile += tile_delta;
-			} while (--w);
-			SetSignalsOnBothDir(tile_org, track);
-			YapfNotifyTrackLayoutChange(tile_org, track);
-			tile_org += tile_delta ^ TileDiffXY(1, 1); // perpendicular to tile_delta
-		} while (--numtracks);
-
-		MarkStationTilesDirty(st);
-		UpdateStationVirtCoordDirty(st);
-		UpdateStationAcceptance(st, false);
-		RebuildStationLists();
-		InvalidateWindow(WC_STATION_LIST, st->owner);
-	}
-
-	return cost;
-}
-
-static void MakeRailwayStationAreaSmaller(Station *st)
-{
-	uint w = st->trainst_w;
-	uint h = st->trainst_h;
-	TileIndex tile = st->train_tile;
-	uint i;
-
-restart:
-
-	// too small?
-	if (w != 0 && h != 0) {
-		// check the left side, x = constant, y changes
-		for (i = 0; !TileBelongsToRailStation(st, tile + TileDiffXY(0, i));) {
-			// the left side is unused?
-			if (++i == h) {
-				tile += TileDiffXY(1, 0);
-				w--;
-				goto restart;
-			}
-		}
-
-		// check the right side, x = constant, y changes
-		for (i = 0; !TileBelongsToRailStation(st, tile + TileDiffXY(w - 1, i));) {
-			// the right side is unused?
-			if (++i == h) {
-				w--;
-				goto restart;
-			}
-		}
-
-		// check the upper side, y = constant, x changes
-		for (i = 0; !TileBelongsToRailStation(st, tile + TileDiffXY(i, 0));) {
-			// the left side is unused?
-			if (++i == w) {
-				tile += TileDiffXY(0, 1);
-				h--;
-				goto restart;
-			}
-		}
-
-		// check the lower side, y = constant, x changes
-		for (i = 0; !TileBelongsToRailStation(st, tile + TileDiffXY(i, h - 1));) {
-			// the left side is unused?
-			if (++i == w) {
-				h--;
-				goto restart;
-			}
-		}
-	} else {
-		tile = 0;
-	}
-
-	st->trainst_w = w;
-	st->trainst_h = h;
-	st->train_tile = tile;
-}
-
-/** Remove a single tile from a railroad station.
- * This allows for custom-built station with holes and weird layouts
- * @param tile tile of station piece to remove
- * @param p1 unused
- * @param p2 unused
- */
-int32 CmdRemoveFromRailroadStation(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
-{
-	Station *st;
-
-	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
-
-	// make sure the specified tile belongs to the current player, and that it is a railroad station.
-	if (!IsTileType(tile, MP_STATION) || !IsRailwayStation(tile) || !_patches.nonuniform_stations) return CMD_ERROR;
-	st = GetStationByTile(tile);
-	if (_current_player != OWNER_WATER && (!CheckOwnership(st->owner) || !EnsureNoVehicle(tile))) return CMD_ERROR;
-
-	// if we reached here, it means we can actually delete it. do that.
-	if (flags & DC_EXEC) {
-		uint specindex = GetCustomStationSpecIndex(tile);
-		Track track = GetRailStationTrack(tile);
-		DoClearSquare(tile);
-		StationRect_AfterRemoveTile(st, tile);
-		SetSignalsOnBothDir(tile, track);
-		YapfNotifyTrackLayoutChange(tile, track);
-
-		DeallocateSpecFromStation(st, specindex);
-
-		// now we need to make the "spanned" area of the railway station smaller if we deleted something at the edges.
-		// we also need to adjust train_tile.
-		MakeRailwayStationAreaSmaller(st);
-		MarkStationTilesDirty(st);
-		UpdateStationSignCoord(st);
-
-		// if we deleted the whole station, delete the train facility.
-		if (st->train_tile == 0) {
-			st->facilities &= ~FACIL_TRAIN;
-			UpdateStationVirtCoordDirty(st);
-			DeleteStationIfEmpty(st);
-		}
-	}
-	return _price.remove_rail_station;
-}
-
-// determine the number of platforms for the station
-uint GetStationPlatforms(const Station *st, TileIndex tile)
-{
-	TileIndex t;
-	TileIndexDiff delta;
-	Axis axis;
-	uint len;
-	assert(TileBelongsToRailStation(st, tile));
-
-	len = 0;
-	axis = GetRailStationAxis(tile);
-	delta = (axis == AXIS_X ? TileDiffXY(1, 0) : TileDiffXY(0, 1));
-
-	// find starting tile..
-	t = tile;
-	do {
-		t -= delta;
-		len++;
-	} while (TileBelongsToRailStation(st, t) && GetRailStationAxis(t) == axis);
-
-	// find ending tile
-	t = tile;
-	do {
-		t += delta;
-		len++;
-	} while (TileBelongsToRailStation(st, t) && GetRailStationAxis(t) == axis);
-
-	return len - 1;
-}
-
-/** Determines the REMAINING length of a platform, starting at (and including)
- * the given tile.
- * @param tile the tile from which to start searching. Must be a railway station tile
- * @param dir The direction in which to search.
- * @return The platform length
- */
-uint GetPlatformLength(TileIndex tile, DiagDirection dir)
-{
-	TileIndex start_tile = tile;
-	uint length = 0;
-	assert(IsRailwayStationTile(tile));
-	assert(dir < DIAGDIR_END);
-
-	do {
-		length ++;
-		tile += TileOffsByDiagDir(dir);
-	} while (IsCompatibleTrainStationTile(tile, start_tile));
-
-	return length;
-}
-
-
-static int32 RemoveRailroadStation(Station *st, TileIndex tile, uint32 flags)
-{
-	int w,h;
-	int32 cost = 0;
-
-	/* if there is flooding and non-uniform stations are enabled, remove platforms tile by tile */
-	if (_current_player == OWNER_WATER && _patches.nonuniform_stations)
-		return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAILROAD_STATION);
-
-	/* Current player owns the station? */
-	if (_current_player != OWNER_WATER && !CheckOwnership(st->owner))
-		return CMD_ERROR;
-
-	/* determine width and height of platforms */
-	tile = st->train_tile;
-	w = st->trainst_w;
-	h = st->trainst_h;
-
-	assert(w != 0 && h != 0);
-
-	/* clear all areas of the station */
-	do {
-		int w_bak = w;
-		do {
-			// for nonuniform stations, only remove tiles that are actually train station tiles
-			if (TileBelongsToRailStation(st, tile)) {
-				if (!EnsureNoVehicle(tile))
-					return CMD_ERROR;
-				cost += _price.remove_rail_station;
-				if (flags & DC_EXEC) {
-					Track track = GetRailStationTrack(tile);
-					DoClearSquare(tile);
-					SetSignalsOnBothDir(tile, track);
-					YapfNotifyTrackLayoutChange(tile, track);
-				}
-			}
-			tile += TileDiffXY(1, 0);
-		} while (--w);
-		w = w_bak;
-		tile += TileDiffXY(-w, 1);
-	} while (--h);
-
-	if (flags & DC_EXEC) {
-		StationRect_AfterRemoveRect(st, st->train_tile, st->trainst_w, st->trainst_h);
-
-		st->train_tile = 0;
-		st->trainst_w = st->trainst_h = 0;
-		st->facilities &= ~FACIL_TRAIN;
-
-		free(st->speclist);
-		st->num_specs = 0;
-		st->speclist  = NULL;
-
-		UpdateStationVirtCoordDirty(st);
-		DeleteStationIfEmpty(st);
-	}
-
-	return cost;
-}
-
-int32 DoConvertStationRail(TileIndex tile, RailType totype, bool exec)
-{
-	const Station* st = GetStationByTile(tile);
-
-	if (!CheckOwnership(st->owner) || !EnsureNoVehicle(tile)) return CMD_ERROR;
-
-	// tile is not a railroad station?
-	if (!IsRailwayStation(tile)) return CMD_ERROR;
-
-	if (GetRailType(tile) == totype) return CMD_ERROR;
-
-	// 'hidden' elrails can't be downgraded to normal rail when elrails are disabled
-	if (_patches.disable_elrails && totype == RAILTYPE_RAIL && GetRailType(tile) == RAILTYPE_ELECTRIC) return CMD_ERROR;
-
-	if (exec) {
-		SetRailType(tile, totype);
-		MarkTileDirtyByTile(tile);
-		YapfNotifyTrackLayoutChange(tile, GetRailStationTrack(tile));
-	}
-
-	return _price.build_rail >> 1;
-}
-
-/** Heavy wizardry used to add a roadstop to a station.
- * To understand the function, lets first look at what is passed around,
- * especially the last two parameters. CmdBuildRoadStop allocates a road
- * stop and needs to put that stop into the linked list of road stops.
- * It (CmdBuildRoadStop) has a **currstop pointer which points to element
- * in the linked list of stops (each element in this list being a pointer
- * in itself, hence the double pointer). We (FindRoadStopSpot) need to
- * modify this pointer (**currstop) thus we need to pass by reference,
- * obtaining a triple pointer (***currstop). When finished, **currstop
- * in CmdBuildRoadStop will contain the address of the pointer which will
- * then point into the global roadstop array. *prev (in CmdBuildRoadStop)
- * is the pointer tino the global roadstop array which has *currstop in
- * its ->next element.
- * @param[in] truck_station Determines whether a stop is RS_BUS or RS_TRUCK
- * @param[in] station The station to do the whole procedure for
- * @param[out] currstop See the detailed function description
- * @param prev See the detailed function description
- */
-static void FindRoadStopSpot(bool truck_station, Station* st, RoadStop*** currstop, RoadStop** prev)
-{
-	RoadStop **primary_stop = (truck_station) ? &st->truck_stops : &st->bus_stops;
-	assert(*prev == NULL);
-
-	if (*primary_stop == NULL) {
-		//we have no roadstop of the type yet, so write a "primary stop"
-		*currstop = primary_stop;
-	} else {
-		//there are stops already, so append to the end of the list
-		*prev = *primary_stop;
-		*currstop = &(*primary_stop)->next;
-		while (**currstop != NULL) {
-			*prev = (*prev)->next;
-			*currstop = &(**currstop)->next;
-		}
-	}
-}
-
-/** Build a bus or truck stop
- * @param tile tile to build the stop at
- * @param p1 entrance direction (DiagDirection)
- * @param p2 0 for Bus stops, 1 for truck stops
- */
-int32 CmdBuildRoadStop(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
-{
-	Station *st;
-	RoadStop *road_stop;
-	RoadStop **currstop;
-	RoadStop *prev = NULL;
-	int32 cost;
-	int32 ret;
-	bool type = !!p2;
-
-	/* Saveguard the parameters */
-	if (!IsValidDiagDirection(p1)) return CMD_ERROR;
-
-	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
-
-	if (!(flags & DC_NO_TOWN_RATING) && !CheckIfAuthorityAllows(tile))
-		return CMD_ERROR;
-
-	ret = CheckFlatLandBelow(tile, 1, 1, flags, 1 << p1, NULL);
-	if (CmdFailed(ret)) return ret;
-	cost = ret;
-
-	st = GetStationAround(tile, 1, 1, -1);
-	if (st == CHECK_STATIONS_ERR) return CMD_ERROR;
-
-	/* Find a station close to us */
-	if (st == NULL) {
-		st = GetClosestStationFromTile(tile, 8, _current_player);
-		if (st != NULL && st->facilities != 0) st = NULL;
-	}
-
-	//give us a road stop in the list, and check if something went wrong
-	road_stop = AllocateRoadStop();
-	if (road_stop == NULL) {
-		return_cmd_error(type ? STR_3008B_TOO_MANY_TRUCK_STOPS : STR_3008A_TOO_MANY_BUS_STOPS);
-	}
-
-	if (st != NULL &&
-			GetNumRoadStopsInStation(st, RS_BUS) + GetNumRoadStopsInStation(st, RS_TRUCK) >= ROAD_STOP_LIMIT) {
-		return_cmd_error(type ? STR_3008B_TOO_MANY_TRUCK_STOPS : STR_3008A_TOO_MANY_BUS_STOPS);
-	}
-
-	if (st != NULL) {
-		if (st->owner != OWNER_NONE && st->owner != _current_player) {
-			return_cmd_error(STR_3009_TOO_CLOSE_TO_ANOTHER_STATION);
-		}
-
-		if (!StationRect_BeforeAddTile(st, tile, RECT_MODE_TEST)) return CMD_ERROR;
-
-		FindRoadStopSpot(type, st, &currstop, &prev);
-	} else {
-		Town *t;
-
-		st = AllocateStation();
-		if (st == NULL) return CMD_ERROR;
-
-		st->town = t = ClosestTownFromTile(tile, (uint)-1);
-
-		FindRoadStopSpot(type, st, &currstop, &prev);
-
-		if (IsValidPlayer(_current_player) && (flags & DC_EXEC)) {
-			SETBIT(t->have_ratings, _current_player);
-		}
-
-		st->sign.width_1 = 0;
-
-		if (!GenerateStationName(st, tile, 0)) return CMD_ERROR;
-
-		if (flags & DC_EXEC) StationInitialize(st, tile);
-	}
-
-	cost += (type) ? _price.build_truck_station : _price.build_bus_station;
-
-	if (flags & DC_EXEC) {
-		//point to the correct item in the _busstops or _truckstops array
-		*currstop = road_stop;
-
-		//initialize an empty station
-		InitializeRoadStop(road_stop, prev, tile, st->index);
-		if (!st->facilities) st->xy = tile;
-		st->facilities |= (type) ? FACIL_TRUCK_STOP : FACIL_BUS_STOP;
-		st->owner = _current_player;
-
-		st->build_date = _date;
-
-		StationRect_BeforeAddTile(st, tile, RECT_MODE_TRY);
-
-		MakeRoadStop(tile, st->owner, st->index, type, p1);
-
-		UpdateStationVirtCoordDirty(st);
-		UpdateStationAcceptance(st, false);
-		RebuildStationLists();
-		InvalidateWindow(WC_STATION_LIST, st->owner);
-	}
-	return cost;
-}
-
-// Remove a bus station
-static int32 RemoveRoadStop(Station *st, uint32 flags, TileIndex tile)
-{
-	RoadStop **primary_stop;
-	RoadStop *cur_stop;
-	bool is_truck = IsTruckStop(tile);
-
-	if (_current_player != OWNER_WATER && !CheckOwnership(st->owner)) {
-		return CMD_ERROR;
-	}
-
-	if (is_truck) { // truck stop
-		primary_stop = &st->truck_stops;
-		cur_stop = GetRoadStopByTile(tile, RS_TRUCK);
-	} else {
-		primary_stop = &st->bus_stops;
-		cur_stop = GetRoadStopByTile(tile, RS_BUS);
-	}
-
-	assert(cur_stop != NULL);
-
-	if (!EnsureNoVehicle(tile)) return CMD_ERROR;
-
-	if (flags & DC_EXEC) {
-		//we only had one stop left
-		if (cur_stop->next == NULL && cur_stop->prev == NULL) {
-			//so we remove ALL stops
-			*primary_stop = NULL;
-			st->facilities &= (is_truck) ? ~FACIL_TRUCK_STOP : ~FACIL_BUS_STOP;
-		} else if (cur_stop == *primary_stop) {
-			//removed the first stop in the list
-			//need to set the primary element to the next stop
-			*primary_stop = (*primary_stop)->next;
-		}
-
-		DeleteRoadStop(cur_stop);
-		DoClearSquare(tile);
-		StationRect_AfterRemoveTile(st, tile);
-
-		UpdateStationVirtCoordDirty(st);
-		DeleteStationIfEmpty(st);
-	}
-
-	return (is_truck) ? _price.remove_truck_station : _price.remove_bus_station;
-}
-
-
-
-// FIXME -- need to move to its corresponding Airport variable
-// Country Airfield (small)
-static const byte _airport_sections_country[] = {
-	54, 53, 52, 65,
-	58, 57, 56, 55,
-	64, 63, 63, 62
-};
-
-// City Airport (large)
-static const byte _airport_sections_town[] = {
-	31,  9, 33,  9,  9, 32,
-	27, 36, 29, 34,  8, 10,
-	30, 11, 35, 13, 20, 21,
-	51, 12, 14, 17, 19, 28,
-	38, 13, 15, 16, 18, 39,
-	26, 22, 23, 24, 25, 26
-};
-
-// Metropolitain Airport (large) - 2 runways
-static const byte _airport_sections_metropolitan[] = {
-	 31,  9, 33,  9,  9, 32,
-	 27, 36, 29, 34,  8, 10,
-	 30, 11, 35, 13, 20, 21,
-	102,  8,  8,  8,  8, 28,
-	 83, 84, 84, 84, 84, 83,
-	 26, 23, 23, 23, 23, 26
-};
-
-// International Airport (large) - 2 runways
-static const byte _airport_sections_international[] = {
-	88, 89, 89, 89, 89, 89,  88,
-	51,  8,  8,  8,  8,  8,  32,
-	30,  8, 11, 27, 11,  8,  10,
-	32,  8, 11, 27, 11,  8, 114,
-	87,  8, 11, 85, 11,  8, 114,
-	87,  8,  8,  8,  8,  8,  90,
-	26, 23, 23, 23, 23, 23,  26
-};
-
-// Intercontinental Airport (vlarge) - 4 runways
-static const byte _airport_sections_intercontinental[] = {
-	102, 120,  89,  89,  89,  89,  89,  89, 118,
-	120,  22,  22,  22,  22,  22,  22, 119, 117,
-	 87,  54,  87,   8,   8,   8,   8,  51, 117,
-	 87, 162,  87,  85, 116, 116,   8,   9,  10,
-	 87,   8,   8,  11,  31,  11,   8, 160,  32,
-	 32, 160,   8,  11,  27,  11,   8,   8,  10,
-	 87,   8,   8,  11,  30,  11,   8,   8,  10,
-	 87, 142,   8,  11,  29,  11,  10, 163,  10,
-	 87, 164,  87,   8,   8,   8,  10,  37, 117,
-	 87, 120,  89,  89,  89,  89,  89,  89, 119,
-	121,  22,  22,  22,  22,  22,  22, 119,  37
-};
-
-
-// Commuter Airfield (small)
-static const byte _airport_sections_commuter[] = {
-	85, 30, 115, 115, 32,
-	87, 8,    8,   8, 10,
-	87, 11,  11,  11, 10,
-	26, 23,  23,  23, 26
-};
-
-// Heliport
-static const byte _airport_sections_heliport[] = {
-	66,
-};
-
-// Helidepot
-static const byte _airport_sections_helidepot[] = {
-	124, 32,
-	122, 123
-};
-
-// Helistation
-static const byte _airport_sections_helistation[] = {
-	 32, 134, 159, 158,
-	161, 142, 142, 157
-};
-
-static const byte * const _airport_sections[] = {
-	_airport_sections_country,           // Country Airfield (small)
-	_airport_sections_town,              // City Airport (large)
-	_airport_sections_heliport,          // Heliport
-	_airport_sections_metropolitan,      // Metropolitain Airport (large)
-	_airport_sections_international,     // International Airport (xlarge)
-	_airport_sections_commuter,          // Commuter Airport (small)
-	_airport_sections_helidepot,         // Helidepot
-	_airport_sections_intercontinental,  // Intercontinental Airport (xxlarge)
-	_airport_sections_helistation        // Helistation
-};
-
-/** Place an Airport.
- * @param tile tile where airport will be built
- * @param p1 airport type, @see airport.h
- * @param p2 unused
- */
-int32 CmdBuildAirport(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
-{
-	Town *t;
-	Station *st;
-	int32 cost;
-	int32 ret;
-	int w, h;
-	bool airport_upgrade = true;
-	const AirportFTAClass* afc;
-
-	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
-
-	/* Check if a valid, buildable airport was chosen for construction */
-	if (p1 > lengthof(_airport_sections) || !HASBIT(GetValidAirports(), p1)) return CMD_ERROR;
-
-	if (!(flags & DC_NO_TOWN_RATING) && !CheckIfAuthorityAllows(tile))
-		return CMD_ERROR;
-
-	t = ClosestTownFromTile(tile, (uint)-1);
-
-	/* Check if local auth refuses a new airport */
-	{
-		uint num = 0;
-		FOR_ALL_STATIONS(st) {
-			if (st->town == t && st->facilities&FACIL_AIRPORT && st->airport_type != AT_OILRIG)
-				num++;
-		}
-		if (num >= 2) {
-			SetDParam(0, t->index);
-			return_cmd_error(STR_2035_LOCAL_AUTHORITY_REFUSES);
-		}
-	}
-
-	afc = GetAirport(p1);
-	w = afc->size_x;
-	h = afc->size_y;
-
-	ret = CheckFlatLandBelow(tile, w, h, flags, 0, NULL);
-	if (CmdFailed(ret)) return ret;
-	cost = ret;
-
-	st = GetStationAround(tile, w, h, -1);
-	if (st == CHECK_STATIONS_ERR) return CMD_ERROR;
-
-	/* Find a station close to us */
-	if (st == NULL) {
-		st = GetClosestStationFromTile(tile, 8, _current_player);
-		if (st != NULL && st->facilities) st = NULL;
-	}
-
-	if (w > _patches.station_spread || h > _patches.station_spread) {
-		_error_message = STR_306C_STATION_TOO_SPREAD_OUT;
-		return CMD_ERROR;
-	}
-
-	if (st != NULL) {
-		if (st->owner != OWNER_NONE && st->owner != _current_player)
-			return_cmd_error(STR_3009_TOO_CLOSE_TO_ANOTHER_STATION);
-
-		if (!StationRect_BeforeAddRect(st, tile, w, h, RECT_MODE_TEST)) return CMD_ERROR;
-
-		if (st->airport_tile != 0)
-			return_cmd_error(STR_300D_TOO_CLOSE_TO_ANOTHER_AIRPORT);
-	} else {
-		airport_upgrade = false;
-
-		st = AllocateStation();
-		if (st == NULL) return CMD_ERROR;
-
-		st->town = t;
-
-		if (IsValidPlayer(_current_player) && (flags & DC_EXEC))
-			SETBIT(t->have_ratings, _current_player);
-
-		st->sign.width_1 = 0;
-
-		// if airport type equals Heliport then generate
-		// type 5 name, which is heliport, otherwise airport names (1)
-		if (!GenerateStationName(st, tile, (p1 == AT_HELIPORT)||(p1 == AT_HELIDEPOT)||(p1 == AT_HELISTATION) ? 5 : 1))
-			return CMD_ERROR;
-
-		if (flags & DC_EXEC) StationInitialize(st, tile);
-	}
-
-	cost += _price.build_airport * w * h;
-
-	if (flags & DC_EXEC) {
-		st->owner = _current_player;
-		st->airport_tile = tile;
-		if (!st->facilities) st->xy = tile;
-		st->facilities |= FACIL_AIRPORT;
-		st->airport_type = (byte)p1;
-		st->airport_flags = 0;
-
-		st->build_date = _date;
-
-		StationRect_BeforeAddRect(st, tile, w, h, RECT_MODE_TRY);
-
-		/* if airport was demolished while planes were en-route to it, the
-		 * positions can no longer be the same (v->u.air.pos), since different
-		 * airports have different indexes. So update all planes en-route to this
-		 * airport. Only update if
-		 * 1. airport is upgraded
-		 * 2. airport is added to existing station (unfortunately unavoideable)
-		 */
-		if (airport_upgrade) UpdateAirplanesOnNewStation(st);
-
-		{
-			const byte *b = _airport_sections[p1];
-
-			BEGIN_TILE_LOOP(tile_cur, w, h, tile) {
-				MakeAirport(tile_cur, st->owner, st->index, *b++);
-			} END_TILE_LOOP(tile_cur, w, h, tile)
-		}
-
-		UpdateStationVirtCoordDirty(st);
-		UpdateStationAcceptance(st, false);
-		RebuildStationLists();
-		InvalidateWindow(WC_STATION_LIST, st->owner);
-	}
-
-	return cost;
-}
-
-static int32 RemoveAirport(Station *st, uint32 flags)
-{
-	TileIndex tile;
-	int w,h;
-	int32 cost;
-	const AirportFTAClass* afc;
-
-	if (_current_player != OWNER_WATER && !CheckOwnership(st->owner))
-		return CMD_ERROR;
-
-	tile = st->airport_tile;
-
-	afc = GetAirport(st->airport_type);
-	w = afc->size_x;
-	h = afc->size_y;
-
-	cost = w * h * _price.remove_airport;
-
-	BEGIN_TILE_LOOP(tile_cur, w, h, tile) {
-		if (!EnsureNoVehicle(tile_cur)) return CMD_ERROR;
-
-		if (flags & DC_EXEC) {
-			DeleteAnimatedTile(tile_cur);
-			DoClearSquare(tile_cur);
-		}
-	} END_TILE_LOOP(tile_cur, w,h,tile)
-
-	if (flags & DC_EXEC) {
-		uint i;
-
-		for (i = 0; i < afc->nof_depots; ++i) {
-			DeleteWindowById(
-				WC_VEHICLE_DEPOT, tile + ToTileIndexDiff(afc->airport_depots[i])
-			);
-		}
-
-		StationRect_AfterRemoveRect(st, tile, w, h);
-
-		st->airport_tile = 0;
-		st->facilities &= ~FACIL_AIRPORT;
-
-		UpdateStationVirtCoordDirty(st);
-		DeleteStationIfEmpty(st);
-	}
-
-	return cost;
-}
-
-/** Build a buoy.
- * @param tile tile where to place the bouy
- * @param p1 unused
- * @param p2 unused
- */
-int32 CmdBuildBuoy(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
-{
-	Station *st;
-
-	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
-
-	if (!IsClearWaterTile(tile) || tile == 0) return_cmd_error(STR_304B_SITE_UNSUITABLE);
-
-	st = AllocateStation();
-	if (st == NULL) return CMD_ERROR;
-
-	st->town = ClosestTownFromTile(tile, (uint)-1);
-	st->sign.width_1 = 0;
-
-	if (!GenerateStationName(st, tile, 4)) return CMD_ERROR;
-
-	if (flags & DC_EXEC) {
-		StationInitialize(st, tile);
-		st->dock_tile = tile;
-		st->facilities |= FACIL_DOCK;
-		/* Buoys are marked in the Station struct by this flag. Yes, it is this
-		 * braindead.. */
-		st->had_vehicle_of_type |= HVOT_BUOY;
-		st->owner = OWNER_NONE;
-
-		st->build_date = _date;
-
-		MakeBuoy(tile, st->index);
-
-		UpdateStationVirtCoordDirty(st);
-		UpdateStationAcceptance(st, false);
-		RebuildStationLists();
-		InvalidateWindow(WC_STATION_LIST, st->owner);
-	}
-
-	return _price.build_dock;
-}
-
-/* Checks if any ship is servicing the buoy specified. Returns yes or no */
-static bool CheckShipsOnBuoy(Station *st)
-{
-	const Vehicle *v;
-	FOR_ALL_VEHICLES(v) {
-		if (v->type == VEH_Ship) {
-			const Order *order;
-			FOR_VEHICLE_ORDERS(v, order) {
-				if (order->type == OT_GOTO_STATION && order->dest == st->index) {
-					return true;
-				}
-			}
-		}
-	}
-	return false;
-}
-
-static int32 RemoveBuoy(Station *st, uint32 flags)
-{
-	TileIndex tile;
-
-	/* XXX: strange stuff */
-	if (!IsValidPlayer(_current_player))  return_cmd_error(INVALID_STRING_ID);
-
-	tile = st->dock_tile;
-
-	if (CheckShipsOnBuoy(st))   return_cmd_error(STR_BUOY_IS_IN_USE);
-	if (!EnsureNoVehicle(tile)) return CMD_ERROR;
-
-	if (flags & DC_EXEC) {
-		st->dock_tile = 0;
-		/* Buoys are marked in the Station struct by this flag. Yes, it is this
-		 * braindead.. */
-		st->facilities &= ~FACIL_DOCK;
-		st->had_vehicle_of_type &= ~HVOT_BUOY;
-
-		MakeWater(tile);
-		MarkTileDirtyByTile(tile);
-
-		UpdateStationVirtCoordDirty(st);
-		DeleteStationIfEmpty(st);
-	}
-
-	return _price.remove_truck_station;
-}
-
-static const TileIndexDiffC _dock_tileoffs_chkaround[] = {
-	{-1,  0},
-	{ 0,  0},
-	{ 0,  0},
-	{ 0, -1}
-};
-static const byte _dock_w_chk[4] = { 2, 1, 2, 1 };
-static const byte _dock_h_chk[4] = { 1, 2, 1, 2 };
-
-/** Build a dock/haven.
- * @param tile tile where dock will be built
- * @param p1 unused
- * @param p2 unused
- */
-int32 CmdBuildDock(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
-{
-	TileIndex tile_cur;
-	DiagDirection direction;
-	int32 cost;
-	Station *st;
-
-	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
-
-	switch (GetTileSlope(tile, NULL)) {
-		case SLOPE_SW: direction = DIAGDIR_NE; break;
-		case SLOPE_SE: direction = DIAGDIR_NW; break;
-		case SLOPE_NW: direction = DIAGDIR_SE; break;
-		case SLOPE_NE: direction = DIAGDIR_SW; break;
-		default: return_cmd_error(STR_304B_SITE_UNSUITABLE);
-	}
-
-	if (!(flags & DC_NO_TOWN_RATING) && !CheckIfAuthorityAllows(tile)) return CMD_ERROR;
-
-	if (!EnsureNoVehicle(tile)) return CMD_ERROR;
-
-	cost = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
-	if (CmdFailed(cost)) return CMD_ERROR;
-
-	tile_cur = tile + TileOffsByDiagDir(direction);
-
-	if (!EnsureNoVehicle(tile_cur)) return CMD_ERROR;
-
-	if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur, NULL) != SLOPE_FLAT) {
-		return_cmd_error(STR_304B_SITE_UNSUITABLE);
-	}
-
-	cost = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
-	if (CmdFailed(cost)) return CMD_ERROR;
-
-	tile_cur += TileOffsByDiagDir(direction);
-	if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur, NULL) != SLOPE_FLAT) {
-		return_cmd_error(STR_304B_SITE_UNSUITABLE);
-	}
-
-	/* middle */
-	st = GetStationAround(
-		tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
-		_dock_w_chk[direction], _dock_h_chk[direction], -1);
-	if (st == CHECK_STATIONS_ERR) return CMD_ERROR;
-
-	/* Find a station close to us */
-	if (st == NULL) {
-		st = GetClosestStationFromTile(tile, 8, _current_player);
-		if (st!=NULL && st->facilities) st = NULL;
-	}
-
-	if (st != NULL) {
-		if (st->owner != OWNER_NONE && st->owner != _current_player)
-			return_cmd_error(STR_3009_TOO_CLOSE_TO_ANOTHER_STATION);
-
-		if (!StationRect_BeforeAddRect(st, tile, _dock_w_chk[direction], _dock_h_chk[direction], RECT_MODE_TEST)) return CMD_ERROR;
-
-		if (st->dock_tile != 0) return_cmd_error(STR_304C_TOO_CLOSE_TO_ANOTHER_DOCK);
-	} else {
-		Town *t;
-
-		st = AllocateStation();
-		if (st == NULL) return CMD_ERROR;
-
-		st->town = t = ClosestTownFromTile(tile, (uint)-1);
-
-		if (IsValidPlayer(_current_player) && (flags & DC_EXEC))
-			SETBIT(t->have_ratings, _current_player);
-
-		st->sign.width_1 = 0;
-
-		if (!GenerateStationName(st, tile, 3)) return CMD_ERROR;
-
-		if (flags & DC_EXEC) StationInitialize(st, tile);
-	}
-
-	if (flags & DC_EXEC) {
-		st->dock_tile = tile;
-		if (!st->facilities) st->xy = tile;
-		st->facilities |= FACIL_DOCK;
-		st->owner = _current_player;
-
-		st->build_date = _date;
-
-		StationRect_BeforeAddRect(st, tile, _dock_w_chk[direction], _dock_h_chk[direction], RECT_MODE_TRY);
-
-		MakeDock(tile, st->owner, st->index, direction);
-
-		UpdateStationVirtCoordDirty(st);
-		UpdateStationAcceptance(st, false);
-		RebuildStationLists();
-		InvalidateWindow(WC_STATION_LIST, st->owner);
-	}
-	return _price.build_dock;
-}
-
-static int32 RemoveDock(Station *st, uint32 flags)
-{
-	TileIndex tile1;
-	TileIndex tile2;
-
-	if (!CheckOwnership(st->owner)) return CMD_ERROR;
-
-	tile1 = st->dock_tile;
-	tile2 = tile1 + TileOffsByDiagDir(GetDockDirection(tile1));
-
-	if (!EnsureNoVehicle(tile1)) return CMD_ERROR;
-	if (!EnsureNoVehicle(tile2)) return CMD_ERROR;
-
-	if (flags & DC_EXEC) {
-		DoClearSquare(tile1);
-		MakeWater(tile2);
-
-		StationRect_AfterRemoveTile(st, tile1);
-		StationRect_AfterRemoveTile(st, tile2);
-
-		MarkTileDirtyByTile(tile2);
-
-		st->dock_tile = 0;
-		st->facilities &= ~FACIL_DOCK;
-
-		UpdateStationVirtCoordDirty(st);
-		DeleteStationIfEmpty(st);
-	}
-
-	return _price.remove_dock;
-}
-
-#include "table/station_land.h"
-
-const DrawTileSprites *GetStationTileLayout(byte gfx)
-{
-	return &_station_display_datas[gfx];
-}
-
-static void DrawTile_Station(TileInfo *ti)
-{
-	uint32 image;
-	const DrawTileSeqStruct *dtss;
-	const DrawTileSprites *t = NULL;
-	RailType railtype = GetRailType(ti->tile);
-	const RailtypeInfo *rti = GetRailTypeInfo(railtype);
-	uint32 relocation = 0;
-	const Station *st = NULL;
-	const StationSpec *statspec = NULL;
-	PlayerID owner = GetTileOwner(ti->tile);
-	uint32 palette;
-
-	if (IsValidPlayer(owner)) {
-		palette = PLAYER_SPRITE_COLOR(owner);
-	} else {
-		// Some stations are not owner by a player, namely oil rigs
-		palette = PALETTE_TO_GREY;
-	}
-
-	// don't show foundation for docks
-	if (ti->tileh != SLOPE_FLAT && !IsDock(ti->tile))
-		DrawFoundation(ti, ti->tileh);
-
-	if (IsCustomStationSpecIndex(ti->tile)) {
-		// look for customization
-		st = GetStationByTile(ti->tile);
-		statspec = st->speclist[GetCustomStationSpecIndex(ti->tile)].spec;
-
-		//debug("Cust-o-mized %p", statspec);
-
-		if (statspec != NULL) {
-			uint tile = GetStationGfx(ti->tile);
-
-			relocation = GetCustomStationRelocation(statspec, st, ti->tile);
-
-			if (HASBIT(statspec->callbackmask, CBM_CUSTOM_LAYOUT)) {
-				uint16 callback = GetStationCallback(CBID_STATION_SPRITE_LAYOUT, 0, 0, statspec, st, ti->tile);
-				if (callback != CALLBACK_FAILED) tile = (callback & ~1) + GetRailStationAxis(ti->tile);
-			}
-
-			/* Ensure the chosen tile layout is valid for this custom station */
-			if (statspec->renderdata != NULL) {
-				t = &statspec->renderdata[tile < statspec->tiles ? tile : GetRailStationAxis(ti->tile)];
-			}
-		}
-	}
-
-	if (t == NULL || t->seq == NULL) t = &_station_display_datas[GetStationGfx(ti->tile)];
-
-	image = t->ground_sprite;
-	if (HASBIT(image, 31)) {
-		CLRBIT(image, 31);
-		image += GetCustomStationGroundRelocation(statspec, st, ti->tile);
-		image += rti->custom_ground_offset;
-	} else {
-		image += rti->total_offset;
-	}
-	if (image & PALETTE_MODIFIER_COLOR) image |= palette;
-
-	// station_land array has been increased from 82 elements to 114
-	// but this is something else. If AI builds station with 114 it looks all weird
-	DrawGroundSprite(image);
-
-	if (GetRailType(ti->tile) == RAILTYPE_ELECTRIC && IsStationTileElectrifiable(ti->tile)) DrawCatenary(ti);
-
-	foreach_draw_tile_seq(dtss, t->seq) {
-		image = dtss->image;
-		if (HASBIT(image, 30)) {
-			CLRBIT(image, 30);
-			image += rti->total_offset;
-		} else {
-			image += relocation;
-		}
-
-		if (_display_opt & DO_TRANS_BUILDINGS) {
-			MAKE_TRANSPARENT(image);
-		} else if (image & PALETTE_MODIFIER_COLOR) {
-			image |= palette;
-		}
-
-		if ((byte)dtss->delta_z != 0x80) {
-			AddSortableSpriteToDraw(
-				image,
-				ti->x + dtss->delta_x, ti->y + dtss->delta_y,
-				dtss->size_x, dtss->size_y,
-				dtss->size_z, ti->z + dtss->delta_z
-			);
-		} else {
-			AddChildSpriteScreen(image, dtss->delta_x, dtss->delta_y);
-		}
-	}
-}
-
-void StationPickerDrawSprite(int x, int y, RailType railtype, int image)
-{
-	uint32 ormod, img;
-	const DrawTileSeqStruct *dtss;
-	const DrawTileSprites *t;
-	const RailtypeInfo *rti = GetRailTypeInfo(railtype);
-
-	ormod = PLAYER_SPRITE_COLOR(_local_player);
-
-	t = &_station_display_datas[image];
-
-	img = t->ground_sprite;
-	if (img & PALETTE_MODIFIER_COLOR) img |= ormod;
-	DrawSprite(img + rti->total_offset, x, y);
-
-	foreach_draw_tile_seq(dtss, t->seq) {
-		Point pt = RemapCoords(dtss->delta_x, dtss->delta_y, dtss->delta_z);
-		DrawSprite((dtss->image | ormod) + rti->total_offset, x + pt.x, y + pt.y);
-	}
-}
-
-static uint GetSlopeZ_Station(TileIndex tile, uint x, uint y)
-{
-	return GetTileMaxZ(tile);
-}
-
-static Slope GetSlopeTileh_Station(TileIndex tile, Slope tileh)
-{
-	return SLOPE_FLAT;
-}
-
-static void GetAcceptedCargo_Station(TileIndex tile, AcceptedCargo ac)
-{
-	/* not used */
-}
-
-static void GetTileDesc_Station(TileIndex tile, TileDesc *td)
-{
-	StringID str;
-
-	td->owner = GetTileOwner(tile);
-	td->build_date = GetStationByTile(tile)->build_date;
-
-	switch (GetStationType(tile)) {
-		default: NOT_REACHED();
-		case STATION_RAIL:    str = STR_305E_RAILROAD_STATION; break;
-		case STATION_AIRPORT:
-			str = (IsHangar(tile) ? STR_305F_AIRCRAFT_HANGAR : STR_3060_AIRPORT);
-			break;
-		case STATION_TRUCK:   str = STR_3061_TRUCK_LOADING_AREA; break;
-		case STATION_BUS:     str = STR_3062_BUS_STATION; break;
-		case STATION_OILRIG:  str = STR_4807_OIL_RIG; break;
-		case STATION_DOCK:    str = STR_3063_SHIP_DOCK; break;
-		case STATION_BUOY:    str = STR_3069_BUOY; break;
-	}
-	td->str = str;
-}
-
-
-static uint32 GetTileTrackStatus_Station(TileIndex tile, TransportType mode)
-{
-	switch (mode) {
-		case TRANSPORT_RAIL:
-			if (IsRailwayStation(tile) && !IsStationTileBlocked(tile)) {
-				return TrackToTrackBits(GetRailStationTrack(tile)) * 0x101;
-			}
-			break;
-
-		case TRANSPORT_WATER:
-			// buoy is coded as a station, it is always on open water
-			if (IsBuoy_(tile)) return TRACK_BIT_ALL * 0x101;
-			break;
-
-		case TRANSPORT_ROAD:
-			if (IsRoadStopTile(tile)) {
-				return AxisToTrackBits(DiagDirToAxis(GetRoadStopDir(tile))) * 0x101;
-			}
-			break;
-
-		default:
-			break;
-	}
-
-	return 0;
-}
-
-
-static void TileLoop_Station(TileIndex tile)
-{
-	// FIXME -- GetTileTrackStatus_Station -> animated stationtiles
-	// hardcoded.....not good
-	switch (GetStationGfx(tile)) {
-		case GFX_RADAR_LARGE_FIRST:
-		case GFX_WINDSACK_FIRST : // for small airport
-		case GFX_RADAR_INTERNATIONAL_FIRST:
-		case GFX_RADAR_METROPOLITAN_FIRST:
-		case GFX_RADAR_DISTRICTWE_FIRST: // radar district W-E airport
-		case GFX_WINDSACK_INTERCON_FIRST : // for intercontinental airport
-			AddAnimatedTile(tile);
-			break;
-
-		case GFX_OILRIG_BASE: //(station part)
-		case GFX_BUOY_BASE:
-			TileLoop_Water(tile);
-			break;
-
-		default: break;
-	}
-}
-
-
-static void AnimateTile_Station(TileIndex tile)
-{
-	typedef struct AnimData {
-		StationGfx from; // first sprite
-		StationGfx to;   // last sprite
-		byte delay;
-	} AnimData;
-
-	static const AnimData data[] = {
-		{ GFX_RADAR_LARGE_FIRST,         GFX_RADAR_LARGE_LAST,         3 },
-		{ GFX_WINDSACK_FIRST,            GFX_WINDSACK_LAST,            1 },
-		{ GFX_RADAR_INTERNATIONAL_FIRST, GFX_RADAR_INTERNATIONAL_LAST, 3 },
-		{ GFX_RADAR_METROPOLITAN_FIRST,  GFX_RADAR_METROPOLITAN_LAST,  3 },
-		{ GFX_RADAR_DISTRICTWE_FIRST,    GFX_RADAR_DISTRICTWE_LAST,    3 },
-		{ GFX_WINDSACK_INTERCON_FIRST,   GFX_WINDSACK_INTERCON_LAST,   1 }
-	};
-
-	StationGfx gfx = GetStationGfx(tile);
-	const AnimData* i;
-
-	for (i = data; i != endof(data); i++) {
-		if (i->from <= gfx && gfx <= i->to) {
-			if ((_tick_counter & i->delay) == 0) {
-				SetStationGfx(tile, gfx < i->to ? gfx + 1 : i->from);
-				MarkTileDirtyByTile(tile);
-			}
-			break;
-		}
-	}
-}
-
-
-static void ClickTile_Station(TileIndex tile)
-{
-	if (IsHangar(tile)) {
-		ShowDepotWindow(tile, VEH_Aircraft);
-	} else {
-		ShowStationViewWindow(GetStationIndex(tile));
-	}
-}
-
-static const byte _enter_station_speedtable[12] = {
-	215, 195, 175, 155, 135, 115, 95, 75, 55, 35, 15, 0
-};
-
-static uint32 VehicleEnter_Station(Vehicle *v, TileIndex tile, int x, int y)
-{
-	if (v->type == VEH_Train) {
-		if (IsRailwayStation(tile) && IsFrontEngine(v) &&
-				!IsCompatibleTrainStationTile(tile + TileOffsByDiagDir(DirToDiagDir(v->direction)), tile)) {
-			StationID station_id = GetStationIndex(tile);
-
-			if ((!(v->current_order.flags & OF_NON_STOP) && !_patches.new_nonstop) ||
-					(v->current_order.type == OT_GOTO_STATION && v->current_order.dest == station_id)) {
-				if (!(_patches.new_nonstop && v->current_order.flags & OF_NON_STOP) &&
-						v->current_order.type != OT_LEAVESTATION &&
-						v->last_station_visited != station_id) {
-					DiagDirection dir = DirToDiagDir(v->direction);
-
-					x &= 0xF;
-					y &= 0xF;
-
-					if (DiagDirToAxis(dir) != AXIS_X) intswap(x, y);
-					if (y == TILE_SIZE / 2) {
-						if (dir != DIAGDIR_SE && dir != DIAGDIR_SW) x = TILE_SIZE - 1 - x;
-						if (x == 12) return 2 | (station_id << 8); /* enter station */
-						if (x < 12) {
-							uint16 spd;
-
-							v->vehstatus |= VS_TRAIN_SLOWING;
-							spd = _enter_station_speedtable[x];
-							if (spd < v->cur_speed) v->cur_speed = spd;
-						}
-					}
-				}
-			}
-		}
-	} else if (v->type == VEH_Road) {
-		if (v->u.road.state < 16 && !HASBIT(v->u.road.state, 2) && v->u.road.frame == 0) {
-			if (IsRoadStop(tile)) {
-				/* Attempt to allocate a parking bay in a road stop */
-				RoadStop *rs = GetRoadStopByTile(tile, GetRoadStopType(tile));
-
-				/* rs->status bits 0 and 1 describe current the two parking spots.
-				 * 0 means occupied, 1 means free. */
-
-				// Check if station is busy or if there are no free bays.
-				if (HASBIT(rs->status, 7) || GB(rs->status, 0, 2) == 0)
-					return 8;
-
-				v->u.road.state += 32;
-
-				// if the first bay is free, allocate that, else the second bay must be free.
-				if (HASBIT(rs->status, 0)) {
-					CLRBIT(rs->status, 0);
-				} else {
-					CLRBIT(rs->status, 1);
-					v->u.road.state += 2;
-				}
-
-				// mark the station as busy
-				SETBIT(rs->status, 7);
-			}
-		}
-	}
-
-	return 0;
-}
-
-/**
- * Cleanup a RoadStop. Make sure no vehicles try to go to this roadstop.
- */
-void DestroyRoadStop(RoadStop* rs)
-{
-	Vehicle *v;
-
-	/* Clear the slot assignment of all vehicles heading for this road stop */
-	if (rs->num_vehicles != 0) {
-		FOR_ALL_VEHICLES(v) {
-			if (v->type == VEH_Road && v->u.road.slot == rs) {
-				ClearSlot(v);
-			}
-		}
-	}
-	assert(rs->num_vehicles == 0);
-
-	if (rs->prev != NULL) rs->prev->next = rs->next;
-	if (rs->next != NULL) rs->next->prev = rs->prev;
-}
-
-/**
- * Clean up a station by clearing vehicle orders and invalidating windows.
- * Aircraft-Hangar orders need special treatment here, as the hangars are
- * actually part of a station (tiletype is STATION), but the order type
- * is OT_GOTO_DEPOT.
- * @param st Station to be deleted
- */
-void DestroyStation(Station *st)
-{
-	StationID index;
-
-	index = st->index;
-
-	DeleteName(st->string_id);
-	MarkStationDirty(st);
-	RebuildStationLists();
-	InvalidateWindowClasses(WC_STATION_LIST);
-
-	DeleteWindowById(WC_STATION_VIEW, index);
-
-	/* Now delete all orders that go to the station */
-	RemoveOrderFromAllVehicles(OT_GOTO_STATION, index);
-
-	//Subsidies need removal as well
-	DeleteSubsidyWithStation(index);
-
-	free(st->speclist);
-}
-
-void DeleteAllPlayerStations(void)
-{
-	Station *st;
-
-	FOR_ALL_STATIONS(st) {
-		if (IsValidPlayer(st->owner)) DeleteStation(st);
-	}
-}
-
-/* this function is called for one station each tick */
-static void StationHandleBigTick(Station *st)
-{
-	UpdateStationAcceptance(st, true);
-
-	if (st->facilities == 0 && ++st->delete_ctr >= 8) DeleteStation(st);
-
-}
-
-static inline void byte_inc_sat(byte *p) { byte b = *p + 1; if (b != 0) *p = b; }
-
-static void UpdateStationRating(Station *st)
-{
-	GoodsEntry *ge;
-	int rating;
-	StationID index;
-	int waiting;
-	bool waiting_changed = false;
-
-	byte_inc_sat(&st->time_since_load);
-	byte_inc_sat(&st->time_since_unload);
-
-	ge = st->goods;
-	do {
-		if (ge->enroute_from != INVALID_STATION) {
-			byte_inc_sat(&ge->enroute_time);
-			byte_inc_sat(&ge->days_since_pickup);
-
-			rating = 0;
-
-			{
-				int b = ge->last_speed;
-				if ((b-=85) >= 0)
-					rating += b >> 2;
-			}
-
-			{
-				byte age = ge->last_age;
-				(age >= 3) ||
-				(rating += 10, age >= 2) ||
-				(rating += 10, age >= 1) ||
-				(rating += 13, true);
-			}
-
-			if (IsValidPlayer(st->owner) && HASBIT(st->town->statues, st->owner)) rating += 26;
-
-			{
-				byte days = ge->days_since_pickup;
-				if (st->last_vehicle_type == VEH_Ship)
-							days >>= 2;
-				(days > 21) ||
-				(rating += 25, days > 12) ||
-				(rating += 25, days > 6) ||
-				(rating += 45, days > 3) ||
-				(rating += 35, true);
-			}
-
-			{
-				waiting = GB(ge->waiting_acceptance, 0, 12);
-				(rating -= 90, waiting > 1500) ||
-				(rating += 55, waiting > 1000) ||
-				(rating += 35, waiting > 600) ||
-				(rating += 10, waiting > 300) ||
-				(rating += 20, waiting > 100) ||
-				(rating += 10, true);
-			}
-
-			{
-				int or = ge->rating; // old rating
-
-				// only modify rating in steps of -2, -1, 0, 1 or 2
-				ge->rating = rating = or + clamp(clamp(rating, 0, 255) - or, -2, 2);
-
-				// if rating is <= 64 and more than 200 items waiting, remove some random amount of goods from the station
-				if (rating <= 64 && waiting >= 200) {
-					int dec = Random() & 0x1F;
-					if (waiting < 400) dec &= 7;
-					waiting -= dec + 1;
-					waiting_changed = true;
-				}
-
-				// if rating is <= 127 and there are any items waiting, maybe remove some goods.
-				if (rating <= 127 && waiting != 0) {
-					uint32 r = Random();
-					if ( (uint)rating <= (r & 0x7F) ) {
-						waiting = max(waiting - ((r >> 8)&3) - 1, 0);
-						waiting_changed = true;
-					}
-				}
-
-				if (waiting_changed) SB(ge->waiting_acceptance, 0, 12, waiting);
-			}
-		}
-	} while (++ge != endof(st->goods));
-
-	index = st->index;
-
-	if (waiting_changed) {
-		InvalidateWindow(WC_STATION_VIEW, index);
-	} else {
-		InvalidateWindowWidget(WC_STATION_VIEW, index, 5);
-	}
-}
-
-/* called for every station each tick */
-static void StationHandleSmallTick(Station *st)
-{
-	byte b;
-
-	if (st->facilities == 0) return;
-
-	b = st->delete_ctr + 1;
-	if (b >= 185) b = 0;
-	st->delete_ctr = b;
-
-	if (b == 0) UpdateStationRating(st);
-}
-
-void OnTick_Station(void)
-{
-	uint i;
-	Station *st;
-
-	if (_game_mode == GM_EDITOR) return;
-
-	i = _station_tick_ctr;
-	if (++_station_tick_ctr > GetMaxStationIndex()) _station_tick_ctr = 0;
-
-	if (IsValidStationID(i)) StationHandleBigTick(GetStation(i));
-
-	FOR_ALL_STATIONS(st) {
-		StationHandleSmallTick(st);
-	}
-}
-
-void StationMonthlyLoop(void)
-{
-}
-
-
-void ModifyStationRatingAround(TileIndex tile, PlayerID owner, int amount, uint radius)
-{
-	Station *st;
-
-	FOR_ALL_STATIONS(st) {
-		if (st->owner == owner &&
-				DistanceManhattan(tile, st->xy) <= radius) {
-			uint i;
-
-			for (i = 0; i != NUM_CARGO; i++) {
-				GoodsEntry* ge = &st->goods[i];
-
-				if (ge->enroute_from != INVALID_STATION) {
-					ge->rating = clamp(ge->rating + amount, 0, 255);
-				}
-			}
-		}
-	}
-}
-
-static void UpdateStationWaiting(Station *st, int type, uint amount)
-{
-	SB(st->goods[type].waiting_acceptance, 0, 12,
-		min(0xFFF, GB(st->goods[type].waiting_acceptance, 0, 12) + amount)
-	);
-
-	st->goods[type].enroute_time = 0;
-	st->goods[type].enroute_from = st->index;
-	InvalidateWindow(WC_STATION_VIEW, st->index);
-	MarkStationTilesDirty(st);
-}
-
-/** Rename a station
- * @param tile unused
- * @param p1 station ID that is to be renamed
- * @param p2 unused
- */
-int32 CmdRenameStation(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
-{
-	StringID str;
-	Station *st;
-
-	if (!IsValidStationID(p1) || _cmd_text[0] == '\0') return CMD_ERROR;
-	st = GetStation(p1);
-
-	if (!CheckOwnership(st->owner)) return CMD_ERROR;
-
-	str = AllocateNameUnique(_cmd_text, 6);
-	if (str == 0) return CMD_ERROR;
-
-	if (flags & DC_EXEC) {
-		StringID old_str = st->string_id;
-
-		st->string_id = str;
-		UpdateStationVirtCoord(st);
-		DeleteName(old_str);
-		ResortStationLists();
-		MarkWholeScreenDirty();
-	} else {
-		DeleteName(str);
-	}
-
-	return 0;
-}
-
-
-uint MoveGoodsToStation(TileIndex tile, int w, int h, int type, uint amount)
-{
-	Station* around[8];
-	uint i;
-	uint moved;
-	uint best_rating, best_rating2;
-	Station *st1, *st2;
-	uint t;
-	int rad = 0;
-	int w_prod; //width and height of the "producer" of the cargo
-	int h_prod;
-	int max_rad;
-
-	for (i = 0; i < lengthof(around); i++) around[i] = NULL;
-
-	if (_patches.modified_catchment) {
-		w_prod = w;
-		h_prod = h;
-		w += 16;
-		h += 16;
-		max_rad = 8;
-	} else {
-		w_prod = 0;
-		h_prod = 0;
-		w += 8;
-		h += 8;
-		max_rad = 4;
-	}
-
-	BEGIN_TILE_LOOP(cur_tile, w, h, tile - TileDiffXY(max_rad, max_rad))
-		Station* st;
-
-		cur_tile = TILE_MASK(cur_tile);
-		if (!IsTileType(cur_tile, MP_STATION)) continue;
-
-		st = GetStationByTile(cur_tile);
-
-		for (i = 0; i != lengthof(around); i++) {
-			if (around[i] == NULL) {
-				if (!IsBuoy(st) &&
-						(st->town->exclusive_counter == 0 || st->town->exclusivity == st->owner) && // check exclusive transport rights
-						st->goods[type].rating != 0 &&
-						(!_patches.selectgoods || st->goods[type].last_speed > 0) && // if last_speed is 0, no vehicle has been there.
-						((st->facilities & ~FACIL_BUS_STOP)   != 0 || type == CT_PASSENGERS) && // if we have other fac. than a bus stop, or the cargo is passengers
-						((st->facilities & ~FACIL_TRUCK_STOP) != 0 || type != CT_PASSENGERS)) { // if we have other fac. than a cargo bay or the cargo is not passengers
-					int x_dist;
-					int y_dist;
-
-					if (_patches.modified_catchment) {
-						// min and max coordinates of the producer relative
-						const int x_min_prod = 9;
-						const int x_max_prod = 8 + w_prod;
-						const int y_min_prod = 9;
-						const int y_max_prod = 8 + h_prod;
-
-						rad = FindCatchmentRadius(st);
-
-						x_dist = min(w_cur - x_min_prod, x_max_prod - w_cur);
-						if (w_cur < x_min_prod) {
-							x_dist = x_min_prod - w_cur;
-						} else if (w_cur > x_max_prod) {
-							x_dist = w_cur - x_max_prod;
-						}
-
-						y_dist = min(h_cur - y_min_prod, y_max_prod - h_cur);
-						if (h_cur < y_min_prod) {
-							y_dist = y_min_prod - h_cur;
-						} else if (h_cur > y_max_prod) {
-							y_dist = h_cur - y_max_prod;
-						}
-					} else {
-						x_dist = 0;
-						y_dist = 0;
-					}
-
-					if (x_dist <= rad && y_dist <= rad) around[i] = st;
-				}
-				break;
-			} else if (around[i] == st) {
-				break;
-			}
-		}
-	END_TILE_LOOP(cur_tile, w, h, tile - TileDiffXY(max_rad, max_rad))
-
-	/* no stations around at all? */
-	if (around[0] == NULL) return 0;
-
-	if (around[1] == NULL) {
-		/* only one station around */
-		moved = (amount * around[0]->goods[type].rating >> 8) + 1;
-		UpdateStationWaiting(around[0], type, moved);
-		return moved;
-	}
-
-	/* several stations around, find the two with the highest rating */
-	st2 = st1 = NULL;
-	best_rating = best_rating2 = 0;
-
-	for (i = 0; i != lengthof(around) && around[i] != NULL; i++) {
-		if (around[i]->goods[type].rating >= best_rating) {
-			best_rating2 = best_rating;
-			st2 = st1;
-
-			best_rating = around[i]->goods[type].rating;
-			st1 = around[i];
-		} else if (around[i]->goods[type].rating >= best_rating2) {
-			best_rating2 = around[i]->goods[type].rating;
-			st2 = around[i];
-		}
-	}
-
-	assert(st1 != NULL);
-	assert(st2 != NULL);
-	assert(best_rating != 0 || best_rating2 != 0);
-
-	/* the 2nd highest one gets a penalty */
-	best_rating2 >>= 1;
-
-	/* amount given to station 1 */
-	t = (best_rating * (amount + 1)) / (best_rating + best_rating2);
-
-	moved = 0;
-	if (t != 0) {
-		moved = t * best_rating / 256 + 1;
-		amount -= t;
-		UpdateStationWaiting(st1, type, moved);
-	}
-
-	if (amount != 0) {
-		amount = amount * best_rating2 / 256 + 1;
-		moved += amount;
-		UpdateStationWaiting(st2, type, amount);
-	}
-
-	return moved;
-}
-
-void BuildOilRig(TileIndex tile)
-{
-	uint j;
-	Station *st = AllocateStation();
-
-	if (st == NULL) {
-		DEBUG(misc, 0, "Can't allocate station for oilrig at 0x%X, reverting to oilrig only", tile);
-		return;
-	}
-	if (!GenerateStationName(st, tile, 2)) {
-		DEBUG(misc, 0, "Can't allocate station-name for oilrig at 0x%X, reverting to oilrig only", tile);
-		return;
-	}
-
-	st->town = ClosestTownFromTile(tile, (uint)-1);
-	st->sign.width_1 = 0;
-
-	MakeOilrig(tile, st->index);
-
-	st->owner = OWNER_NONE;
-	st->airport_flags = 0;
-	st->airport_type = AT_OILRIG;
-	st->xy = tile;
-	st->bus_stops = NULL;
-	st->truck_stops = NULL;
-	st->airport_tile = tile;
-	st->dock_tile = tile;
-	st->train_tile = 0;
-	st->had_vehicle_of_type = 0;
-	st->time_since_load = 255;
-	st->time_since_unload = 255;
-	st->delete_ctr = 0;
-	st->last_vehicle_type = VEH_Invalid;
-	st->facilities = FACIL_AIRPORT | FACIL_DOCK;
-	st->build_date = _date;
-
-	for (j = 0; j != NUM_CARGO; j++) {
-		st->goods[j].waiting_acceptance = 0;
-		st->goods[j].days_since_pickup = 0;
-		st->goods[j].enroute_from = INVALID_STATION;
-		st->goods[j].rating = 175;
-		st->goods[j].last_speed = 0;
-		st->goods[j].last_age = 255;
-	}
-
-	UpdateStationVirtCoordDirty(st);
-	UpdateStationAcceptance(st, false);
-}
-
-void DeleteOilRig(TileIndex tile)
-{
-	Station* st = GetStationByTile(tile);
-
-	DoClearSquare(tile);
-
-	st->dock_tile = 0;
-	st->airport_tile = 0;
-	st->facilities &= ~(FACIL_AIRPORT | FACIL_DOCK);
-	st->airport_flags = 0;
-	UpdateStationVirtCoordDirty(st);
-	DeleteStation(st);
-}
-
-static void ChangeTileOwner_Station(TileIndex tile, PlayerID old_player, PlayerID new_player)
-{
-	if (!IsTileOwner(tile, old_player)) return;
-
-	if (new_player != PLAYER_SPECTATOR) {
-		Station* st = GetStationByTile(tile);
-
-		SetTileOwner(tile, new_player);
-		st->owner = new_player;
-		RebuildStationLists();
-		InvalidateWindowClasses(WC_STATION_LIST);
-	} else {
-		DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
-	}
-}
-
-static int32 ClearTile_Station(TileIndex tile, byte flags)
-{
-	Station *st;
-
-	if (flags & DC_AUTO) {
-		switch (GetStationType(tile)) {
-			case STATION_RAIL:    return_cmd_error(STR_300B_MUST_DEMOLISH_RAILROAD);
-			case STATION_AIRPORT: return_cmd_error(STR_300E_MUST_DEMOLISH_AIRPORT_FIRST);
-			case STATION_TRUCK:   return_cmd_error(STR_3047_MUST_DEMOLISH_TRUCK_STATION);
-			case STATION_BUS:     return_cmd_error(STR_3046_MUST_DEMOLISH_BUS_STATION);
-			case STATION_BUOY:    return_cmd_error(STR_306A_BUOY_IN_THE_WAY);
-			case STATION_DOCK:    return_cmd_error(STR_304D_MUST_DEMOLISH_DOCK_FIRST);
-			case STATION_OILRIG:
-				SetDParam(0, STR_4807_OIL_RIG);
-				return_cmd_error(STR_4800_IN_THE_WAY);
-		}
-	}
-
-	st = GetStationByTile(tile);
-
-	switch (GetStationType(tile)) {
-		case STATION_RAIL:    return RemoveRailroadStation(st, tile, flags);
-		case STATION_AIRPORT: return RemoveAirport(st, flags);
-		case STATION_TRUCK:
-		case STATION_BUS:     return RemoveRoadStop(st, flags, tile);
-		case STATION_BUOY:    return RemoveBuoy(st, flags);
-		case STATION_DOCK:    return RemoveDock(st, flags);
-		default: break;
-	}
-
-	return CMD_ERROR;
-}
-
-void InitializeStations(void)
-{
-	/* Clean the station pool and create 1 block in it */
-	CleanPool(&_Station_pool);
-	AddBlockToPool(&_Station_pool);
-
-	/* Clean the roadstop pool and create 1 block in it */
-	CleanPool(&_RoadStop_pool);
-	AddBlockToPool(&_RoadStop_pool);
-
-	_station_tick_ctr = 0;
-
-}
-
-
-void AfterLoadStations(void)
-{
-	Station *st;
-	uint i;
-	TileIndex tile;
-
-	/* Update the speclists of all stations to point to the currently loaded custom stations. */
-	FOR_ALL_STATIONS(st) {
-		for (i = 0; i < st->num_specs; i++) {
-			if (st->speclist[i].grfid == 0) continue;
-
-			st->speclist[i].spec = GetCustomStationSpecByGrf(st->speclist[i].grfid, st->speclist[i].localidx);
-		}
-	}
-
-	for (tile = 0; tile < MapSize(); tile++) {
-		if (GetTileType(tile) != MP_STATION) continue;
-		st = GetStationByTile(tile);
-		StationRect_BeforeAddTile(st, tile, RECT_MODE_FORCE);
-	}
-}
-
-
-const TileTypeProcs _tile_type_station_procs = {
-	DrawTile_Station,           /* draw_tile_proc */
-	GetSlopeZ_Station,          /* get_slope_z_proc */
-	ClearTile_Station,          /* clear_tile_proc */
-	GetAcceptedCargo_Station,   /* get_accepted_cargo_proc */
-	GetTileDesc_Station,        /* get_tile_desc_proc */
-	GetTileTrackStatus_Station, /* get_tile_track_status_proc */
-	ClickTile_Station,          /* click_tile_proc */
-	AnimateTile_Station,        /* animate_tile_proc */
-	TileLoop_Station,           /* tile_loop_clear */
-	ChangeTileOwner_Station,    /* change_tile_owner_clear */
-	NULL,                       /* get_produced_cargo_proc */
-	VehicleEnter_Station,       /* vehicle_enter_tile_proc */
-	GetSlopeTileh_Station,      /* get_slope_tileh_proc */
-};
-
-static const SaveLoad _roadstop_desc[] = {
-	SLE_VAR(RoadStop,xy,           SLE_UINT32),
-	SLE_VAR(RoadStop,used,         SLE_BOOL),
-	SLE_VAR(RoadStop,status,       SLE_UINT8),
-	/* Index was saved in some versions, but this is not needed */
-	SLE_CONDNULL(4, 0, 8),
-	SLE_VAR(RoadStop,station,      SLE_UINT16),
-	SLE_CONDNULL(1, 0, 25),
-
-	SLE_REF(RoadStop,next,         REF_ROADSTOPS),
-	SLE_REF(RoadStop,prev,         REF_ROADSTOPS),
-
-	SLE_CONDNULL(4, 0, 24),
-	SLE_CONDNULL(1, 25, 25),
-
-	SLE_END()
-};
-
-static const SaveLoad _station_desc[] = {
-	SLE_CONDVAR(Station, xy,                         SLE_FILE_U16 | SLE_VAR_U32,  0, 5),
-	SLE_CONDVAR(Station, xy,                         SLE_UINT32,                  6, SL_MAX_VERSION),
-	SLE_CONDVAR(Station, bus_tile_obsolete,          SLE_FILE_U16 | SLE_VAR_U32,  0, 5),
-	SLE_CONDVAR(Station, lorry_tile_obsolete,        SLE_FILE_U16 | SLE_VAR_U32,  0, 5),
-	SLE_CONDVAR(Station, train_tile,                 SLE_FILE_U16 | SLE_VAR_U32,  0, 5),
-	SLE_CONDVAR(Station, train_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_tile,                  SLE_UINT32,                  6, SL_MAX_VERSION),
-	    SLE_REF(Station, town,                       REF_TOWN),
-	    SLE_VAR(Station, trainst_w,                  SLE_UINT8),
-	SLE_CONDVAR(Station, trainst_h,                  SLE_UINT8,                   2, SL_MAX_VERSION),
-
-	// alpha_order was stored here in savegame format 0 - 3
-	SLE_CONDNULL(1, 0, 3),
-
-	    SLE_VAR(Station, string_id,                  SLE_STRINGID),
-	    SLE_VAR(Station, had_vehicle_of_type,        SLE_UINT16),
-
-	    SLE_VAR(Station, time_since_load,            SLE_UINT8),
-	    SLE_VAR(Station, time_since_unload,          SLE_UINT8),
-	    SLE_VAR(Station, delete_ctr,                 SLE_UINT8),
-	    SLE_VAR(Station, owner,                      SLE_UINT8),
-	    SLE_VAR(Station, facilities,                 SLE_UINT8),
-	    SLE_VAR(Station, airport_type,               SLE_UINT8),
-
-	// truck/bus_stop_status was stored here in savegame format 0 - 6
-	SLE_CONDVAR(Station, truck_stop_status_obsolete, SLE_UINT8, 0, 5),
-	SLE_CONDVAR(Station, bus_stop_status_obsolete,   SLE_UINT8, 0, 5),
-
-	// blocked_months was stored here in savegame format 0 - 4.0
-	SLE_CONDVAR(Station, blocked_months_obsolete,    SLE_UINT8, 0, 4),
-
-	SLE_CONDVAR(Station, airport_flags,              SLE_VAR_U32 | SLE_FILE_U16,  0,  2),
-	SLE_CONDVAR(Station, airport_flags,              SLE_UINT32,                  3, SL_MAX_VERSION),
-
-	SLE_CONDNULL(2, 0, 25), /* Ex last-vehicle */
-	SLE_CONDVAR(Station, last_vehicle_type,          SLE_UINT8,                  26, SL_MAX_VERSION),
-
-	// Was custom station class and id
-	SLE_CONDNULL(2, 3, 25),
-	SLE_CONDVAR(Station, build_date,                 SLE_FILE_U16 | SLE_VAR_I32,  3, 30),
-	SLE_CONDVAR(Station, build_date,                 SLE_INT32,                  31, SL_MAX_VERSION),
-
-	SLE_CONDREF(Station, bus_stops,                  REF_ROADSTOPS,               6, SL_MAX_VERSION),
-	SLE_CONDREF(Station, truck_stops,                REF_ROADSTOPS,               6, SL_MAX_VERSION),
-
-	/* Used by newstations for graphic variations */
-	SLE_CONDVAR(Station, random_bits,                SLE_UINT16,                 27, SL_MAX_VERSION),
-	SLE_CONDVAR(Station, waiting_triggers,           SLE_UINT8,                  27, SL_MAX_VERSION),
-	SLE_CONDVAR(Station, num_specs,                  SLE_UINT8,                  27, SL_MAX_VERSION),
-
-	// reserve extra space in savegame here. (currently 32 bytes)
-	SLE_CONDNULL(32, 2, SL_MAX_VERSION),
-
-	SLE_END()
-};
-
-static const SaveLoad _goods_desc[] = {
-	    SLE_VAR(GoodsEntry, waiting_acceptance, SLE_UINT16),
-	    SLE_VAR(GoodsEntry, days_since_pickup,  SLE_UINT8),
-	    SLE_VAR(GoodsEntry, rating,             SLE_UINT8),
-	SLE_CONDVAR(GoodsEntry, enroute_from,       SLE_FILE_U8 | SLE_VAR_U16,  0, 6),
-	SLE_CONDVAR(GoodsEntry, enroute_from,       SLE_UINT16,                 7, SL_MAX_VERSION),
-	    SLE_VAR(GoodsEntry, enroute_time,       SLE_UINT8),
-	    SLE_VAR(GoodsEntry, last_speed,         SLE_UINT8),
-	    SLE_VAR(GoodsEntry, last_age,           SLE_UINT8),
-	SLE_CONDVAR(GoodsEntry, feeder_profit,      SLE_INT32,                 14, SL_MAX_VERSION),
-
-	SLE_END()
-};
-
-static const SaveLoad _station_speclist_desc[] = {
-	SLE_CONDVAR(StationSpecList, grfid,    SLE_UINT32, 27, SL_MAX_VERSION),
-	SLE_CONDVAR(StationSpecList, localidx, SLE_UINT8,  27, SL_MAX_VERSION),
-
-	SLE_END()
-};
-
-
-static void SaveLoad_STNS(Station *st)
-{
-	uint i;
-
-	SlObject(st, _station_desc);
-	for (i = 0; i != NUM_CARGO; i++) {
-		SlObject(&st->goods[i], _goods_desc);
-
-		/* In older versions, enroute_from had 0xFF as INVALID_STATION, is now 0xFFFF */
-		if (CheckSavegameVersion(7) && st->goods[i].enroute_from == 0xFF) {
-			st->goods[i].enroute_from = INVALID_STATION;
-		}
-	}
-
-	if (st->num_specs != 0) {
-		/* Allocate speclist memory when loading a game */
-		if (st->speclist == NULL) st->speclist = calloc(st->num_specs, sizeof(*st->speclist));
-		for (i = 0; i < st->num_specs; i++) SlObject(&st->speclist[i], _station_speclist_desc);
-	}
-}
-
-static void Save_STNS(void)
-{
-	Station *st;
-	// Write the stations
-	FOR_ALL_STATIONS(st) {
-		SlSetArrayIndex(st->index);
-		SlAutolength((AutolengthProc*)SaveLoad_STNS, st);
-	}
-}
-
-static void Load_STNS(void)
-{
-	int index;
-	while ((index = SlIterateArray()) != -1) {
-		Station *st;
-
-		if (!AddBlockIfNeeded(&_Station_pool, index))
-			error("Stations: failed loading savegame: too many stations");
-
-		st = GetStation(index);
-		SaveLoad_STNS(st);
-
-		// this means it's an oldstyle savegame without support for nonuniform stations
-		if (st->train_tile != 0 && st->trainst_h == 0) {
-			uint w = GB(st->trainst_w, 4, 4);
-			uint h = GB(st->trainst_w, 0, 4);
-
-			if (GetRailStationAxis(st->train_tile) == AXIS_Y) uintswap(w, h);
-			st->trainst_w = w;
-			st->trainst_h = h;
-		}
-
-		/* In older versions, we had just 1 tile for a bus/lorry, now we have more..
-		 *  convert, if needed */
-		if (CheckSavegameVersion(6)) {
-			if (st->bus_tile_obsolete != 0) {
-				st->bus_stops = AllocateRoadStop();
-				if (st->bus_stops == NULL)
-					error("Station: too many busstations in savegame");
-
-				InitializeRoadStop(st->bus_stops, NULL, st->bus_tile_obsolete, st->index);
-			}
-			if (st->lorry_tile_obsolete != 0) {
-				st->truck_stops = AllocateRoadStop();
-				if (st->truck_stops == NULL)
-					error("Station: too many truckstations in savegame");
-
-				InitializeRoadStop(st->truck_stops, NULL, st->lorry_tile_obsolete, st->index);
-			}
-		}
-	}
-
-	/* This is to ensure all pointers are within the limits of _stations_size */
-	if (_station_tick_ctr > GetMaxStationIndex()) _station_tick_ctr = 0;
-}
-
-static void Save_ROADSTOP(void)
-{
-	RoadStop *rs;
-
-	FOR_ALL_ROADSTOPS(rs) {
-		SlSetArrayIndex(rs->index);
-		SlObject(rs, _roadstop_desc);
-	}
-}
-
-static void Load_ROADSTOP(void)
-{
-	int index;
-	Vehicle *v;
-
-	while ((index = SlIterateArray()) != -1) {
-		RoadStop *rs;
-
-		if (!AddBlockIfNeeded(&_RoadStop_pool, index))
-			error("RoadStops: failed loading savegame: too many RoadStops");
-
-		rs = GetRoadStop(index);
-		SlObject(rs, _roadstop_desc);
-	}
-
-	FOR_ALL_VEHICLES(v) {
-		if (v->type == VEH_Road && v->u.road.slot != NULL) v->u.road.slot->num_vehicles++;
-	}
-}
-
-const ChunkHandler _station_chunk_handlers[] = {
-	{ 'STNS', Save_STNS,      Load_STNS,      CH_ARRAY },
-	{ 'ROAD', Save_ROADSTOP,  Load_ROADSTOP,  CH_ARRAY | CH_LAST},
-};
-
-
-static inline bool PtInRectXY(Rect *r, int x, int y)
-{
-	return (r->left <= x && x <= r->right && r->top <= y && y <= r->bottom);
-}
-
-static void StationRect_Init(Station *st)
-{
-	Rect *r = &st->rect;
-	r->left = r->top = r->right = r->bottom = 0;
-}
-
-static bool StationRect_IsEmpty(Station *st)
-{
-	return (st->rect.left == 0 || st->rect.left > st->rect.right || st->rect.top > st->rect.bottom);
-}
-
-static bool StationRect_BeforeAddTile(Station *st, TileIndex tile, StationRectMode mode)
-{
-	Rect *r = &st->rect;
-	int x = TileX(tile);
-	int y = TileY(tile);
-	if (StationRect_IsEmpty(st)) {
-		// we are adding the first station tile
-		r->left = r->right = x;
-		r->top = r->bottom = y;
-	} else if (!PtInRectXY(r, x, y)) {
-		// current rect is not empty and new point is outside this rect
-		// make new spread-out rectangle
-		Rect new_rect = {min(x, r->left), min(y, r->top), max(x, r->right), max(y, r->bottom)};
-		// check new rect dimensions against preset max
-		int w = new_rect.right - new_rect.left + 1;
-		int h = new_rect.bottom - new_rect.top + 1;
-		if (mode != RECT_MODE_FORCE && (w > _patches.station_spread || h > _patches.station_spread)) {
-			assert(mode != RECT_MODE_TRY);
-			_error_message = STR_306C_STATION_TOO_SPREAD_OUT;
-			return false;
-		}
-		// spread-out ok, return true
-		if (mode != RECT_MODE_TEST) {
-			// we should update the station rect
-			*r = new_rect;
-		}
-	} else {
-		; // new point is inside the rect, we don't need to do anything
-	}
-	return true;
-}
-
-static bool StationRect_BeforeAddRect(Station *st, TileIndex tile, int w, int h, StationRectMode mode)
-{
-	return StationRect_BeforeAddTile(st, tile, mode) && StationRect_BeforeAddTile(st, TILE_ADDXY(tile, w - 1, h - 1), mode);
-}
-
-static inline bool ScanRectForStationTiles(StationID st_id, int left, int top, int right, int bottom)
-{
-	TileIndex top_left = TileXY(left, top);
-	int width = right - left + 1;
-	int height = bottom - top + 1;
-	BEGIN_TILE_LOOP(tile, width, height, top_left)
-		if (IsTileType(tile, MP_STATION) && GetStationIndex(tile) == st_id) return true;
-	END_TILE_LOOP(tile, width, height, top_left);
-	return false;
-}
-
-static bool StationRect_AfterRemoveTile(Station *st, TileIndex tile)
-{
-	Rect *r = &st->rect;
-	int x = TileX(tile);
-	int y = TileY(tile);
-	bool reduce_x, reduce_y;
-
-	// look if removed tile was on the bounding rect edge
-	// and try to reduce the rect by this edge
-	// do it until we have empty rect or nothing to do
-	for (;;) {
-		// check if removed tile is on rect edge
-		bool left_edge = (x == r->left);
-		bool right_edge = (x == r->right);
-		bool top_edge = (y == r->top);
-		bool bottom_edge = (y == r->bottom);
-		// can we reduce the rect in either direction?
-		reduce_x = ((left_edge || right_edge) && !ScanRectForStationTiles(st->index, x, r->top, x, r->bottom));
-		reduce_y = ((top_edge || bottom_edge) && !ScanRectForStationTiles(st->index, r->left, y, r->right, y));
-		if (!(reduce_x || reduce_y)) break; // nothing to do (can't reduce)
-		if (reduce_x) {
-			// reduce horizontally
-			if (left_edge) {
-				// move left edge right
-				r->left = x = x + 1;
-			} else {
-				// move right edge left
-				r->right = x = x - 1;
-			}
-		}
-		if (reduce_y) {
-			// reduce vertically
-			if (top_edge) {
-				// move top edge down
-				r->top = y = y + 1;
-			} else {
-				// move bottom edge up
-				r->bottom = y = y - 1;
-			}
-		}
-		if (r->left > r->right || r->top > r->bottom) {
-		// can't continue, if the remaining rectangle is empty
-			StationRect_Init(st);
-			return true; // empty remaining rect
-		}
-	}
-	return false; // non-empty remaining rect
-}
-
-static bool StationRect_AfterRemoveRect(Station *st, TileIndex tile, int w, int h)
-{
-	bool empty;
-	assert(PtInRectXY(&st->rect, TileX(tile), TileY(tile)));
-	assert(PtInRectXY(&st->rect, TileX(tile) + w - 1, TileY(tile) + h - 1));
-	empty = StationRect_AfterRemoveTile(st, tile);
-	if (w != 1 || h != 1) empty = empty || StationRect_AfterRemoveTile(st, TILE_ADDXY(tile, w - 1, h - 1));
-	return empty;
-}