station_cmd.cpp

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00001 /* $Id$ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
00012 #include "stdafx.h"
00013 #include "aircraft.h"
00014 #include "bridge_map.h"
00015 #include "cmd_helper.h"
00016 #include "viewport_func.h"
00017 #include "command_func.h"
00018 #include "town.h"
00019 #include "news_func.h"
00020 #include "train.h"
00021 #include "roadveh.h"
00022 #include "industry.h"
00023 #include "newgrf_cargo.h"
00024 #include "newgrf_debug.h"
00025 #include "newgrf_station.h"
00026 #include "newgrf_canal.h" /* For the buoy */
00027 #include "pathfinder/yapf/yapf_cache.h"
00028 #include "road_internal.h" /* For drawing catenary/checking road removal */
00029 #include "autoslope.h"
00030 #include "water.h"
00031 #include "station_gui.h"
00032 #include "strings_func.h"
00033 #include "clear_func.h"
00034 #include "window_func.h"
00035 #include "date_func.h"
00036 #include "vehicle_func.h"
00037 #include "string_func.h"
00038 #include "animated_tile_func.h"
00039 #include "elrail_func.h"
00040 #include "station_base.h"
00041 #include "roadstop_base.h"
00042 #include "newgrf_railtype.h"
00043 #include "waypoint_base.h"
00044 #include "waypoint_func.h"
00045 #include "pbs.h"
00046 #include "debug.h"
00047 #include "core/random_func.hpp"
00048 #include "company_base.h"
00049 #include "moving_average.h"
00050 #include "table/airporttile_ids.h"
00051 #include "newgrf_airporttiles.h"
00052 #include "order_backup.h"
00053 #include "newgrf_house.h"
00054 #include "company_gui.h"
00055 
00056 #include "table/strings.h"
00057 
00064 bool IsHangar(TileIndex t)
00065 {
00066   assert(IsTileType(t, MP_STATION));
00067 
00068   /* If the tile isn't an airport there's no chance it's a hangar. */
00069   if (!IsAirport(t)) return false;
00070 
00071   const Station *st = Station::GetByTile(t);
00072   const AirportSpec *as = st->airport.GetSpec();
00073 
00074   for (uint i = 0; i < as->nof_depots; i++) {
00075     if (st->airport.GetHangarTile(i) == t) return true;
00076   }
00077 
00078   return false;
00079 }
00080 
00088 template <class T>
00089 CommandCost GetStationAround(TileArea ta, StationID closest_station, T **st)
00090 {
00091   ta.tile -= TileDiffXY(1, 1);
00092   ta.w    += 2;
00093   ta.h    += 2;
00094 
00095   /* check around to see if there's any stations there */
00096   TILE_AREA_LOOP(tile_cur, ta) {
00097     if (IsTileType(tile_cur, MP_STATION)) {
00098       StationID t = GetStationIndex(tile_cur);
00099       if (!T::IsValidID(t)) continue;
00100 
00101       if (closest_station == INVALID_STATION) {
00102         closest_station = t;
00103       } else if (closest_station != t) {
00104         return_cmd_error(STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING);
00105       }
00106     }
00107   }
00108   *st = (closest_station == INVALID_STATION) ? NULL : T::Get(closest_station);
00109   return CommandCost();
00110 }
00111 
00117 typedef bool (*CMSAMatcher)(TileIndex tile);
00118 
00125 static int CountMapSquareAround(TileIndex tile, CMSAMatcher cmp)
00126 {
00127   int num = 0;
00128 
00129   for (int dx = -3; dx <= 3; dx++) {
00130     for (int dy = -3; dy <= 3; dy++) {
00131       TileIndex t = TileAddWrap(tile, dx, dy);
00132       if (t != INVALID_TILE && cmp(t)) num++;
00133     }
00134   }
00135 
00136   return num;
00137 }
00138 
00144 static bool CMSAMine(TileIndex tile)
00145 {
00146   /* No industry */
00147   if (!IsTileType(tile, MP_INDUSTRY)) return false;
00148 
00149   const Industry *ind = Industry::GetByTile(tile);
00150 
00151   /* No extractive industry */
00152   if ((GetIndustrySpec(ind->type)->life_type & INDUSTRYLIFE_EXTRACTIVE) == 0) return false;
00153 
00154   for (uint i = 0; i < lengthof(ind->produced_cargo); i++) {
00155     /* The industry extracts something non-liquid, i.e. no oil or plastic, so it is a mine.
00156      * Also the production of passengers and mail is ignored. */
00157     if (ind->produced_cargo[i] != CT_INVALID &&
00158         (CargoSpec::Get(ind->produced_cargo[i])->classes & (CC_LIQUID | CC_PASSENGERS | CC_MAIL)) == 0) {
00159       return true;
00160     }
00161   }
00162 
00163   return false;
00164 }
00165 
00171 static bool CMSAWater(TileIndex tile)
00172 {
00173   return IsTileType(tile, MP_WATER) && IsWater(tile);
00174 }
00175 
00181 static bool CMSATree(TileIndex tile)
00182 {
00183   return IsTileType(tile, MP_TREES);
00184 }
00185 
00186 #define M(x) ((x) - STR_SV_STNAME)
00187 
00188 enum StationNaming {
00189   STATIONNAMING_RAIL,
00190   STATIONNAMING_ROAD,
00191   STATIONNAMING_AIRPORT,
00192   STATIONNAMING_OILRIG,
00193   STATIONNAMING_DOCK,
00194   STATIONNAMING_HELIPORT,
00195 };
00196 
00198 struct StationNameInformation {
00199   uint32 free_names; 
00200   bool *indtypes;    
00201 };
00202 
00211 static bool FindNearIndustryName(TileIndex tile, void *user_data)
00212 {
00213   /* All already found industry types */
00214   StationNameInformation *sni = (StationNameInformation*)user_data;
00215   if (!IsTileType(tile, MP_INDUSTRY)) return false;
00216 
00217   /* If the station name is undefined it means that it doesn't name a station */
00218   IndustryType indtype = GetIndustryType(tile);
00219   if (GetIndustrySpec(indtype)->station_name == STR_UNDEFINED) return false;
00220 
00221   /* In all cases if an industry that provides a name is found two of
00222    * the standard names will be disabled. */
00223   sni->free_names &= ~(1 << M(STR_SV_STNAME_OILFIELD) | 1 << M(STR_SV_STNAME_MINES));
00224   return !sni->indtypes[indtype];
00225 }
00226 
00227 static StringID GenerateStationName(Station *st, TileIndex tile, StationNaming name_class)
00228 {
00229   static const uint32 _gen_station_name_bits[] = {
00230     0,                                       // STATIONNAMING_RAIL
00231     0,                                       // STATIONNAMING_ROAD
00232     1U << M(STR_SV_STNAME_AIRPORT),          // STATIONNAMING_AIRPORT
00233     1U << M(STR_SV_STNAME_OILFIELD),         // STATIONNAMING_OILRIG
00234     1U << M(STR_SV_STNAME_DOCKS),            // STATIONNAMING_DOCK
00235     1U << M(STR_SV_STNAME_HELIPORT),         // STATIONNAMING_HELIPORT
00236   };
00237 
00238   const Town *t = st->town;
00239   uint32 free_names = UINT32_MAX;
00240 
00241   bool indtypes[NUM_INDUSTRYTYPES];
00242   memset(indtypes, 0, sizeof(indtypes));
00243 
00244   const Station *s;
00245   FOR_ALL_STATIONS(s) {
00246     if (s != st && s->town == t) {
00247       if (s->indtype != IT_INVALID) {
00248         indtypes[s->indtype] = true;
00249         continue;
00250       }
00251       uint str = M(s->string_id);
00252       if (str <= 0x20) {
00253         if (str == M(STR_SV_STNAME_FOREST)) {
00254           str = M(STR_SV_STNAME_WOODS);
00255         }
00256         ClrBit(free_names, str);
00257       }
00258     }
00259   }
00260 
00261   TileIndex indtile = tile;
00262   StationNameInformation sni = { free_names, indtypes };
00263   if (CircularTileSearch(&indtile, 7, FindNearIndustryName, &sni)) {
00264     /* An industry has been found nearby */
00265     IndustryType indtype = GetIndustryType(indtile);
00266     const IndustrySpec *indsp = GetIndustrySpec(indtype);
00267     /* STR_NULL means it only disables oil rig/mines */
00268     if (indsp->station_name != STR_NULL) {
00269       st->indtype = indtype;
00270       return STR_SV_STNAME_FALLBACK;
00271     }
00272   }
00273 
00274   /* Oil rigs/mines name could be marked not free by looking for a near by industry. */
00275   free_names = sni.free_names;
00276 
00277   /* check default names */
00278   uint32 tmp = free_names & _gen_station_name_bits[name_class];
00279   if (tmp != 0) return STR_SV_STNAME + FindFirstBit(tmp);
00280 
00281   /* check mine? */
00282   if (HasBit(free_names, M(STR_SV_STNAME_MINES))) {
00283     if (CountMapSquareAround(tile, CMSAMine) >= 2) {
00284       return STR_SV_STNAME_MINES;
00285     }
00286   }
00287 
00288   /* check close enough to town to get central as name? */
00289   if (DistanceMax(tile, t->xy) < 8) {
00290     if (HasBit(free_names, M(STR_SV_STNAME))) return STR_SV_STNAME;
00291 
00292     if (HasBit(free_names, M(STR_SV_STNAME_CENTRAL))) return STR_SV_STNAME_CENTRAL;
00293   }
00294 
00295   /* Check lakeside */
00296   if (HasBit(free_names, M(STR_SV_STNAME_LAKESIDE)) &&
00297       DistanceFromEdge(tile) < 20 &&
00298       CountMapSquareAround(tile, CMSAWater) >= 5) {
00299     return STR_SV_STNAME_LAKESIDE;
00300   }
00301 
00302   /* Check woods */
00303   if (HasBit(free_names, M(STR_SV_STNAME_WOODS)) && (
00304         CountMapSquareAround(tile, CMSATree) >= 8 ||
00305         CountMapSquareAround(tile, IsTileForestIndustry) >= 2)
00306       ) {
00307     return _settings_game.game_creation.landscape == LT_TROPIC ? STR_SV_STNAME_FOREST : STR_SV_STNAME_WOODS;
00308   }
00309 
00310   /* check elevation compared to town */
00311   int z = GetTileZ(tile);
00312   int z2 = GetTileZ(t->xy);
00313   if (z < z2) {
00314     if (HasBit(free_names, M(STR_SV_STNAME_VALLEY))) return STR_SV_STNAME_VALLEY;
00315   } else if (z > z2) {
00316     if (HasBit(free_names, M(STR_SV_STNAME_HEIGHTS))) return STR_SV_STNAME_HEIGHTS;
00317   }
00318 
00319   /* check direction compared to town */
00320   static const int8 _direction_and_table[] = {
00321     ~( (1 << M(STR_SV_STNAME_WEST))  | (1 << M(STR_SV_STNAME_EAST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
00322     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_WEST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
00323     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_EAST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
00324     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_WEST)) | (1 << M(STR_SV_STNAME_EAST)) ),
00325   };
00326 
00327   free_names &= _direction_and_table[
00328     (TileX(tile) < TileX(t->xy)) +
00329     (TileY(tile) < TileY(t->xy)) * 2];
00330 
00331   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));
00332   return (tmp == 0) ? STR_SV_STNAME_FALLBACK : (STR_SV_STNAME + FindFirstBit(tmp));
00333 }
00334 #undef M
00335 
00341 static Station *GetClosestDeletedStation(TileIndex tile)
00342 {
00343   uint threshold = 8;
00344   Station *best_station = NULL;
00345   Station *st;
00346 
00347   FOR_ALL_STATIONS(st) {
00348     if (!st->IsInUse() && st->owner == _current_company) {
00349       uint cur_dist = DistanceManhattan(tile, st->xy);
00350 
00351       if (cur_dist < threshold) {
00352         threshold = cur_dist;
00353         best_station = st;
00354       }
00355     }
00356   }
00357 
00358   return best_station;
00359 }
00360 
00361 
00362 void Station::GetTileArea(TileArea *ta, StationType type) const
00363 {
00364   switch (type) {
00365     case STATION_RAIL:
00366       *ta = this->train_station;
00367       return;
00368 
00369     case STATION_AIRPORT:
00370       *ta = this->airport;
00371       return;
00372 
00373     case STATION_TRUCK:
00374       *ta = this->truck_station;
00375       return;
00376 
00377     case STATION_BUS:
00378       *ta = this->bus_station;
00379       return;
00380 
00381     case STATION_DOCK:
00382     case STATION_OILRIG:
00383       ta->tile = this->dock_tile;
00384       break;
00385 
00386     default: NOT_REACHED();
00387   }
00388 
00389   ta->w = 1;
00390   ta->h = 1;
00391 }
00392 
00396 void Station::UpdateVirtCoord()
00397 {
00398   Point pt = RemapCoords2(TileX(this->xy) * TILE_SIZE, TileY(this->xy) * TILE_SIZE);
00399 
00400   pt.y -= 32 * ZOOM_LVL_BASE;
00401   if ((this->facilities & FACIL_AIRPORT) && this->airport.type == AT_OILRIG) pt.y -= 16 * ZOOM_LVL_BASE;
00402 
00403   SetDParam(0, this->index);
00404   SetDParam(1, this->facilities);
00405   this->sign.UpdatePosition(pt.x, pt.y, STR_VIEWPORT_STATION);
00406 
00407   SetWindowDirty(WC_STATION_VIEW, this->index);
00408 }
00409 
00411 void UpdateAllStationVirtCoords()
00412 {
00413   BaseStation *st;
00414 
00415   FOR_ALL_BASE_STATIONS(st) {
00416     st->UpdateVirtCoord();
00417   }
00418 }
00419 
00425 static uint GetAcceptanceMask(const Station *st)
00426 {
00427   uint mask = 0;
00428 
00429   for (CargoID i = 0; i < NUM_CARGO; i++) {
00430     if (HasBit(st->goods[i].acceptance_pickup, GoodsEntry::GES_ACCEPTANCE)) mask |= 1 << i;
00431   }
00432   return mask;
00433 }
00434 
00439 static void ShowRejectOrAcceptNews(const Station *st, uint num_items, CargoID *cargo, StringID msg)
00440 {
00441   for (uint i = 0; i < num_items; i++) {
00442     SetDParam(i + 1, CargoSpec::Get(cargo[i])->name);
00443   }
00444 
00445   SetDParam(0, st->index);
00446   AddNewsItem(msg, NS_ACCEPTANCE, NR_STATION, st->index);
00447 }
00448 
00456 CargoArray GetProductionAroundTiles(TileIndex tile, int w, int h, int rad)
00457 {
00458   CargoArray produced;
00459 
00460   int x = TileX(tile);
00461   int y = TileY(tile);
00462 
00463   /* expand the region by rad tiles on each side
00464    * while making sure that we remain inside the board. */
00465   int x2 = min(x + w + rad, MapSizeX());
00466   int x1 = max(x - rad, 0);
00467 
00468   int y2 = min(y + h + rad, MapSizeY());
00469   int y1 = max(y - rad, 0);
00470 
00471   assert(x1 < x2);
00472   assert(y1 < y2);
00473   assert(w > 0);
00474   assert(h > 0);
00475 
00476   TileArea ta(TileXY(x1, y1), TileXY(x2 - 1, y2 - 1));
00477 
00478   /* Loop over all tiles to get the produced cargo of
00479    * everything except industries */
00480   TILE_AREA_LOOP(tile, ta) AddProducedCargo(tile, produced);
00481 
00482   /* Loop over the industries. They produce cargo for
00483    * anything that is within 'rad' from their bounding
00484    * box. As such if you have e.g. a oil well the tile
00485    * area loop might not hit an industry tile while
00486    * the industry would produce cargo for the station.
00487    */
00488   const Industry *i;
00489   FOR_ALL_INDUSTRIES(i) {
00490     if (!ta.Intersects(i->location)) continue;
00491 
00492     for (uint j = 0; j < lengthof(i->produced_cargo); j++) {
00493       CargoID cargo = i->produced_cargo[j];
00494       if (cargo != CT_INVALID) produced[cargo]++;
00495     }
00496   }
00497 
00498   return produced;
00499 }
00500 
00509 CargoArray GetAcceptanceAroundTiles(TileIndex tile, int w, int h, int rad, uint32 *always_accepted)
00510 {
00511   CargoArray acceptance;
00512   if (always_accepted != NULL) *always_accepted = 0;
00513 
00514   int x = TileX(tile);
00515   int y = TileY(tile);
00516 
00517   /* expand the region by rad tiles on each side
00518    * while making sure that we remain inside the board. */
00519   int x2 = min(x + w + rad, MapSizeX());
00520   int y2 = min(y + h + rad, MapSizeY());
00521   int x1 = max(x - rad, 0);
00522   int y1 = max(y - rad, 0);
00523 
00524   assert(x1 < x2);
00525   assert(y1 < y2);
00526   assert(w > 0);
00527   assert(h > 0);
00528 
00529   for (int yc = y1; yc != y2; yc++) {
00530     for (int xc = x1; xc != x2; xc++) {
00531       TileIndex tile = TileXY(xc, yc);
00532       AddAcceptedCargo(tile, acceptance, always_accepted);
00533     }
00534   }
00535 
00536   return acceptance;
00537 }
00538 
00544 void UpdateStationAcceptance(Station *st, bool show_msg)
00545 {
00546   /* old accepted goods types */
00547   uint old_acc = GetAcceptanceMask(st);
00548 
00549   /* And retrieve the acceptance. */
00550   CargoArray acceptance;
00551   if (!st->rect.IsEmpty()) {
00552     acceptance = GetAcceptanceAroundTiles(
00553       TileXY(st->rect.left, st->rect.top),
00554       st->rect.right  - st->rect.left + 1,
00555       st->rect.bottom - st->rect.top  + 1,
00556       st->GetCatchmentRadius(),
00557       &st->always_accepted
00558     );
00559   }
00560 
00561   /* Adjust in case our station only accepts fewer kinds of goods */
00562   for (CargoID i = 0; i < NUM_CARGO; i++) {
00563     uint amt = min(acceptance[i], 15);
00564 
00565     /* Make sure the station can accept the goods type. */
00566     bool is_passengers = IsCargoInClass(i, CC_PASSENGERS);
00567     if ((!is_passengers && !(st->facilities & ~FACIL_BUS_STOP)) ||
00568         (is_passengers && !(st->facilities & ~FACIL_TRUCK_STOP))) {
00569       amt = 0;
00570     }
00571 
00572     SB(st->goods[i].acceptance_pickup, GoodsEntry::GES_ACCEPTANCE, 1, amt >= 8);
00573   }
00574 
00575   /* Only show a message in case the acceptance was actually changed. */
00576   uint new_acc = GetAcceptanceMask(st);
00577   if (old_acc == new_acc) return;
00578 
00579   /* show a message to report that the acceptance was changed? */
00580   if (show_msg && st->owner == _local_company && st->IsInUse()) {
00581     /* List of accept and reject strings for different number of
00582      * cargo types */
00583     static const StringID accept_msg[] = {
00584       STR_NEWS_STATION_NOW_ACCEPTS_CARGO,
00585       STR_NEWS_STATION_NOW_ACCEPTS_CARGO_AND_CARGO,
00586     };
00587     static const StringID reject_msg[] = {
00588       STR_NEWS_STATION_NO_LONGER_ACCEPTS_CARGO,
00589       STR_NEWS_STATION_NO_LONGER_ACCEPTS_CARGO_OR_CARGO,
00590     };
00591 
00592     /* Array of accepted and rejected cargo types */
00593     CargoID accepts[2] = { CT_INVALID, CT_INVALID };
00594     CargoID rejects[2] = { CT_INVALID, CT_INVALID };
00595     uint num_acc = 0;
00596     uint num_rej = 0;
00597 
00598     /* Test each cargo type to see if its acceptange has changed */
00599     for (CargoID i = 0; i < NUM_CARGO; i++) {
00600       if (HasBit(new_acc, i)) {
00601         if (!HasBit(old_acc, i) && num_acc < lengthof(accepts)) {
00602           /* New cargo is accepted */
00603           accepts[num_acc++] = i;
00604         }
00605       } else {
00606         if (HasBit(old_acc, i) && num_rej < lengthof(rejects)) {
00607           /* Old cargo is no longer accepted */
00608           rejects[num_rej++] = i;
00609         }
00610       }
00611     }
00612 
00613     /* Show news message if there are any changes */
00614     if (num_acc > 0) ShowRejectOrAcceptNews(st, num_acc, accepts, accept_msg[num_acc - 1]);
00615     if (num_rej > 0) ShowRejectOrAcceptNews(st, num_rej, rejects, reject_msg[num_rej - 1]);
00616   }
00617 
00618   /* redraw the station view since acceptance changed */
00619   SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_ACCEPTLIST);
00620 }
00621 
00622 static void UpdateStationSignCoord(BaseStation *st)
00623 {
00624   const StationRect *r = &st->rect;
00625 
00626   if (r->IsEmpty()) return; // no tiles belong to this station
00627 
00628   /* clamp sign coord to be inside the station rect */
00629   st->xy = TileXY(ClampU(TileX(st->xy), r->left, r->right), ClampU(TileY(st->xy), r->top, r->bottom));
00630   st->UpdateVirtCoord();
00631 }
00632 
00639 static void DeleteStationIfEmpty(BaseStation *st)
00640 {
00641   if (!st->IsInUse()) {
00642     st->delete_ctr = 0;
00643     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
00644   }
00645   /* station remains but it probably lost some parts - station sign should stay in the station boundaries */
00646   UpdateStationSignCoord(st);
00647 }
00648 
00649 CommandCost ClearTile_Station(TileIndex tile, DoCommandFlag flags);
00650 
00660 CommandCost CheckBuildableTile(TileIndex tile, uint invalid_dirs, int &allowed_z, bool allow_steep, bool check_bridge = true)
00661 {
00662   if (check_bridge && MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) {
00663     return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
00664   }
00665 
00666   CommandCost ret = EnsureNoVehicleOnGround(tile);
00667   if (ret.Failed()) return ret;
00668 
00669   int z;
00670   Slope tileh = GetTileSlope(tile, &z);
00671 
00672   /* Prohibit building if
00673    *   1) The tile is "steep" (i.e. stretches two height levels).
00674    *   2) The tile is non-flat and the build_on_slopes switch is disabled.
00675    */
00676   if ((!allow_steep && IsSteepSlope(tileh)) ||
00677       ((!_settings_game.construction.build_on_slopes) && tileh != SLOPE_FLAT)) {
00678     return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00679   }
00680 
00681   CommandCost cost(EXPENSES_CONSTRUCTION);
00682   int flat_z = z + GetSlopeMaxZ(tileh);
00683   if (tileh != SLOPE_FLAT) {
00684     /* Forbid building if the tile faces a slope in a invalid direction. */
00685     for (DiagDirection dir = DIAGDIR_BEGIN; dir != DIAGDIR_END; dir++) {
00686       if (HasBit(invalid_dirs, dir) && !CanBuildDepotByTileh(dir, tileh)) {
00687         return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00688       }
00689     }
00690     cost.AddCost(_price[PR_BUILD_FOUNDATION]);
00691   }
00692 
00693   /* The level of this tile must be equal to allowed_z. */
00694   if (allowed_z < 0) {
00695     /* First tile. */
00696     allowed_z = flat_z;
00697   } else if (allowed_z != flat_z) {
00698     return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00699   }
00700 
00701   return cost;
00702 }
00703 
00710 CommandCost CheckFlatLand(TileArea tile_area, DoCommandFlag flags)
00711 {
00712   CommandCost cost(EXPENSES_CONSTRUCTION);
00713   int allowed_z = -1;
00714 
00715   TILE_AREA_LOOP(tile_cur, tile_area) {
00716     CommandCost ret = CheckBuildableTile(tile_cur, 0, allowed_z, true);
00717     if (ret.Failed()) return ret;
00718     cost.AddCost(ret);
00719 
00720     ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00721     if (ret.Failed()) return ret;
00722     cost.AddCost(ret);
00723   }
00724 
00725   return cost;
00726 }
00727 
00742 static CommandCost CheckFlatLandRailStation(TileArea tile_area, DoCommandFlag flags, Axis axis, StationID *station, RailType rt, SmallVector<Train *, 4> &affected_vehicles, StationClassID spec_class, byte spec_index, byte plat_len, byte numtracks)
00743 {
00744   CommandCost cost(EXPENSES_CONSTRUCTION);
00745   int allowed_z = -1;
00746   uint invalid_dirs = 5 << axis;
00747 
00748   const StationSpec *statspec = StationClass::Get(spec_class, spec_index);
00749   bool slope_cb = statspec != NULL && HasBit(statspec->callback_mask, CBM_STATION_SLOPE_CHECK);
00750 
00751   TILE_AREA_LOOP(tile_cur, tile_area) {
00752     CommandCost ret = CheckBuildableTile(tile_cur, invalid_dirs, allowed_z, false);
00753     if (ret.Failed()) return ret;
00754     cost.AddCost(ret);
00755 
00756     if (slope_cb) {
00757       /* Do slope check if requested. */
00758       ret = PerformStationTileSlopeCheck(tile_area.tile, tile_cur, statspec, axis, plat_len, numtracks);
00759       if (ret.Failed()) return ret;
00760     }
00761 
00762     /* if station is set, then we have special handling to allow building on top of already existing stations.
00763      * so station points to INVALID_STATION if we can build on any station.
00764      * Or it points to a station if we're only allowed to build on exactly that station. */
00765     if (station != NULL && IsTileType(tile_cur, MP_STATION)) {
00766       if (!IsRailStation(tile_cur)) {
00767         return ClearTile_Station(tile_cur, DC_AUTO); // get error message
00768       } else {
00769         StationID st = GetStationIndex(tile_cur);
00770         if (*station == INVALID_STATION) {
00771           *station = st;
00772         } else if (*station != st) {
00773           return_cmd_error(STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING);
00774         }
00775       }
00776     } else {
00777       /* Rail type is only valid when building a railway station; if station to
00778        * build isn't a rail station it's INVALID_RAILTYPE. */
00779       if (rt != INVALID_RAILTYPE &&
00780           IsPlainRailTile(tile_cur) && !HasSignals(tile_cur) &&
00781           HasPowerOnRail(GetRailType(tile_cur), rt)) {
00782         /* Allow overbuilding if the tile:
00783          *  - has rail, but no signals
00784          *  - it has exactly one track
00785          *  - the track is in line with the station
00786          *  - the current rail type has power on the to-be-built type (e.g. convert normal rail to el rail)
00787          */
00788         TrackBits tracks = GetTrackBits(tile_cur);
00789         Track track = RemoveFirstTrack(&tracks);
00790         Track expected_track = HasBit(invalid_dirs, DIAGDIR_NE) ? TRACK_X : TRACK_Y;
00791 
00792         if (tracks == TRACK_BIT_NONE && track == expected_track) {
00793           /* Check for trains having a reservation for this tile. */
00794           if (HasBit(GetRailReservationTrackBits(tile_cur), track)) {
00795             Train *v = GetTrainForReservation(tile_cur, track);
00796             if (v != NULL) {
00797               *affected_vehicles.Append() = v;
00798             }
00799           }
00800           CommandCost ret = DoCommand(tile_cur, 0, track, flags, CMD_REMOVE_SINGLE_RAIL);
00801           if (ret.Failed()) return ret;
00802           cost.AddCost(ret);
00803           /* With flags & ~DC_EXEC CmdLandscapeClear would fail since the rail still exists */
00804           continue;
00805         }
00806       }
00807       ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00808       if (ret.Failed()) return ret;
00809       cost.AddCost(ret);
00810     }
00811   }
00812 
00813   return cost;
00814 }
00815 
00828 static CommandCost CheckFlatLandRoadStop(TileArea tile_area, DoCommandFlag flags, uint invalid_dirs, bool is_drive_through, bool is_truck_stop, Axis axis, StationID *station, RoadTypes rts)
00829 {
00830   CommandCost cost(EXPENSES_CONSTRUCTION);
00831   int allowed_z = -1;
00832 
00833   TILE_AREA_LOOP(cur_tile, tile_area) {
00834     CommandCost ret = CheckBuildableTile(cur_tile, invalid_dirs, allowed_z, !is_drive_through);
00835     if (ret.Failed()) return ret;
00836     cost.AddCost(ret);
00837 
00838     /* If station is set, then we have special handling to allow building on top of already existing stations.
00839      * Station points to INVALID_STATION if we can build on any station.
00840      * Or it points to a station if we're only allowed to build on exactly that station. */
00841     if (station != NULL && IsTileType(cur_tile, MP_STATION)) {
00842       if (!IsRoadStop(cur_tile)) {
00843         return ClearTile_Station(cur_tile, DC_AUTO); // Get error message.
00844       } else {
00845         if (is_truck_stop != IsTruckStop(cur_tile) ||
00846             is_drive_through != IsDriveThroughStopTile(cur_tile)) {
00847           return ClearTile_Station(cur_tile, DC_AUTO); // Get error message.
00848         }
00849         /* Drive-through station in the wrong direction. */
00850         if (is_drive_through && IsDriveThroughStopTile(cur_tile) && DiagDirToAxis(GetRoadStopDir(cur_tile)) != axis){
00851           return_cmd_error(STR_ERROR_DRIVE_THROUGH_DIRECTION);
00852         }
00853         StationID st = GetStationIndex(cur_tile);
00854         if (*station == INVALID_STATION) {
00855           *station = st;
00856         } else if (*station != st) {
00857           return_cmd_error(STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING);
00858         }
00859       }
00860     } else {
00861       bool build_over_road = is_drive_through && IsNormalRoadTile(cur_tile);
00862       /* Road bits in the wrong direction. */
00863       RoadBits rb = IsNormalRoadTile(cur_tile) ? GetAllRoadBits(cur_tile) : ROAD_NONE;
00864       if (build_over_road && (rb & (axis == AXIS_X ? ROAD_Y : ROAD_X)) != 0) {
00865         /* Someone was pedantic and *NEEDED* three fracking different error messages. */
00866         switch (CountBits(rb)) {
00867           case 1:
00868             return_cmd_error(STR_ERROR_DRIVE_THROUGH_DIRECTION);
00869 
00870           case 2:
00871             if (rb == ROAD_X || rb == ROAD_Y) return_cmd_error(STR_ERROR_DRIVE_THROUGH_DIRECTION);
00872             return_cmd_error(STR_ERROR_DRIVE_THROUGH_CORNER);
00873 
00874           default: // 3 or 4
00875             return_cmd_error(STR_ERROR_DRIVE_THROUGH_JUNCTION);
00876         }
00877       }
00878 
00879       RoadTypes cur_rts = IsNormalRoadTile(cur_tile) ? GetRoadTypes(cur_tile) : ROADTYPES_NONE;
00880       uint num_roadbits = 0;
00881       if (build_over_road) {
00882         /* There is a road, check if we can build road+tram stop over it. */
00883         if (HasBit(cur_rts, ROADTYPE_ROAD)) {
00884           Owner road_owner = GetRoadOwner(cur_tile, ROADTYPE_ROAD);
00885           if (road_owner == OWNER_TOWN) {
00886             if (!_settings_game.construction.road_stop_on_town_road) return_cmd_error(STR_ERROR_DRIVE_THROUGH_ON_TOWN_ROAD);
00887           } else if (!_settings_game.construction.road_stop_on_competitor_road && road_owner != OWNER_NONE) {
00888             CommandCost ret = CheckOwnership(road_owner);
00889             if (ret.Failed()) return ret;
00890           }
00891           num_roadbits += CountBits(GetRoadBits(cur_tile, ROADTYPE_ROAD));
00892         }
00893 
00894         /* There is a tram, check if we can build road+tram stop over it. */
00895         if (HasBit(cur_rts, ROADTYPE_TRAM)) {
00896           Owner tram_owner = GetRoadOwner(cur_tile, ROADTYPE_TRAM);
00897           if (!_settings_game.construction.road_stop_on_competitor_road && tram_owner != OWNER_NONE) {
00898             CommandCost ret = CheckOwnership(tram_owner);
00899             if (ret.Failed()) return ret;
00900           }
00901           num_roadbits += CountBits(GetRoadBits(cur_tile, ROADTYPE_TRAM));
00902         }
00903 
00904         /* Take into account existing roadbits. */
00905         rts |= cur_rts;
00906       } else {
00907         ret = DoCommand(cur_tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00908         if (ret.Failed()) return ret;
00909         cost.AddCost(ret);
00910       }
00911 
00912       uint roadbits_to_build = CountBits(rts) * 2 - num_roadbits;
00913       cost.AddCost(_price[PR_BUILD_ROAD] * roadbits_to_build);
00914     }
00915   }
00916 
00917   return cost;
00918 }
00919 
00927 CommandCost CanExpandRailStation(const BaseStation *st, TileArea &new_ta, Axis axis)
00928 {
00929   TileArea cur_ta = st->train_station;
00930 
00931   /* determine new size of train station region.. */
00932   int x = min(TileX(cur_ta.tile), TileX(new_ta.tile));
00933   int y = min(TileY(cur_ta.tile), TileY(new_ta.tile));
00934   new_ta.w = max(TileX(cur_ta.tile) + cur_ta.w, TileX(new_ta.tile) + new_ta.w) - x;
00935   new_ta.h = max(TileY(cur_ta.tile) + cur_ta.h, TileY(new_ta.tile) + new_ta.h) - y;
00936   new_ta.tile = TileXY(x, y);
00937 
00938   /* make sure the final size is not too big. */
00939   if (new_ta.w > _settings_game.station.station_spread || new_ta.h > _settings_game.station.station_spread) {
00940     return_cmd_error(STR_ERROR_STATION_TOO_SPREAD_OUT);
00941   }
00942 
00943   return CommandCost();
00944 }
00945 
00946 static inline byte *CreateSingle(byte *layout, int n)
00947 {
00948   int i = n;
00949   do *layout++ = 0; while (--i);
00950   layout[((n - 1) >> 1) - n] = 2;
00951   return layout;
00952 }
00953 
00954 static inline byte *CreateMulti(byte *layout, int n, byte b)
00955 {
00956   int i = n;
00957   do *layout++ = b; while (--i);
00958   if (n > 4) {
00959     layout[0 - n] = 0;
00960     layout[n - 1 - n] = 0;
00961   }
00962   return layout;
00963 }
00964 
00972 void GetStationLayout(byte *layout, int numtracks, int plat_len, const StationSpec *statspec)
00973 {
00974   if (statspec != NULL && statspec->lengths >= plat_len &&
00975       statspec->platforms[plat_len - 1] >= numtracks &&
00976       statspec->layouts[plat_len - 1][numtracks - 1]) {
00977     /* Custom layout defined, follow it. */
00978     memcpy(layout, statspec->layouts[plat_len - 1][numtracks - 1],
00979       plat_len * numtracks);
00980     return;
00981   }
00982 
00983   if (plat_len == 1) {
00984     CreateSingle(layout, numtracks);
00985   } else {
00986     if (numtracks & 1) layout = CreateSingle(layout, plat_len);
00987     numtracks >>= 1;
00988 
00989     while (--numtracks >= 0) {
00990       layout = CreateMulti(layout, plat_len, 4);
00991       layout = CreateMulti(layout, plat_len, 6);
00992     }
00993   }
00994 }
00995 
01007 template <class T, StringID error_message>
01008 CommandCost FindJoiningBaseStation(StationID existing_station, StationID station_to_join, bool adjacent, TileArea ta, T **st)
01009 {
01010   assert(*st == NULL);
01011   bool check_surrounding = true;
01012 
01013   if (_settings_game.station.adjacent_stations) {
01014     if (existing_station != INVALID_STATION) {
01015       if (adjacent && existing_station != station_to_join) {
01016         /* You can't build an adjacent station over the top of one that
01017          * already exists. */
01018         return_cmd_error(error_message);
01019       } else {
01020         /* Extend the current station, and don't check whether it will
01021          * be near any other stations. */
01022         *st = T::GetIfValid(existing_station);
01023         check_surrounding = (*st == NULL);
01024       }
01025     } else {
01026       /* There's no station here. Don't check the tiles surrounding this
01027        * one if the company wanted to build an adjacent station. */
01028       if (adjacent) check_surrounding = false;
01029     }
01030   }
01031 
01032   if (check_surrounding) {
01033     /* Make sure there are no similar stations around us. */
01034     CommandCost ret = GetStationAround(ta, existing_station, st);
01035     if (ret.Failed()) return ret;
01036   }
01037 
01038   /* Distant join */
01039   if (*st == NULL && station_to_join != INVALID_STATION) *st = T::GetIfValid(station_to_join);
01040 
01041   return CommandCost();
01042 }
01043 
01053 static CommandCost FindJoiningStation(StationID existing_station, StationID station_to_join, bool adjacent, TileArea ta, Station **st)
01054 {
01055   return FindJoiningBaseStation<Station, STR_ERROR_MUST_REMOVE_RAILWAY_STATION_FIRST>(existing_station, station_to_join, adjacent, ta, st);
01056 }
01057 
01067 CommandCost FindJoiningWaypoint(StationID existing_waypoint, StationID waypoint_to_join, bool adjacent, TileArea ta, Waypoint **wp)
01068 {
01069   return FindJoiningBaseStation<Waypoint, STR_ERROR_MUST_REMOVE_RAILWAYPOINT_FIRST>(existing_waypoint, waypoint_to_join, adjacent, ta, wp);
01070 }
01071 
01089 CommandCost CmdBuildRailStation(TileIndex tile_org, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01090 {
01091   /* Unpack parameters */
01092   RailType rt    = Extract<RailType, 0, 4>(p1);
01093   Axis axis      = Extract<Axis, 4, 1>(p1);
01094   byte numtracks = GB(p1,  8, 8);
01095   byte plat_len  = GB(p1, 16, 8);
01096   bool adjacent  = HasBit(p1, 24);
01097 
01098   StationClassID spec_class = Extract<StationClassID, 0, 8>(p2);
01099   byte spec_index           = GB(p2, 8, 8);
01100   StationID station_to_join = GB(p2, 16, 16);
01101 
01102   /* Does the authority allow this? */
01103   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile_org, flags);
01104   if (ret.Failed()) return ret;
01105 
01106   if (!ValParamRailtype(rt)) return CMD_ERROR;
01107 
01108   /* Check if the given station class is valid */
01109   if ((uint)spec_class >= StationClass::GetCount() || spec_class == STAT_CLASS_WAYP) return CMD_ERROR;
01110   if (spec_index >= StationClass::GetCount(spec_class)) return CMD_ERROR;
01111   if (plat_len == 0 || numtracks == 0) return CMD_ERROR;
01112 
01113   int w_org, h_org;
01114   if (axis == AXIS_X) {
01115     w_org = plat_len;
01116     h_org = numtracks;
01117   } else {
01118     h_org = plat_len;
01119     w_org = numtracks;
01120   }
01121 
01122   bool reuse = (station_to_join != NEW_STATION);
01123   if (!reuse) station_to_join = INVALID_STATION;
01124   bool distant_join = (station_to_join != INVALID_STATION);
01125 
01126   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
01127 
01128   if (h_org > _settings_game.station.station_spread || w_org > _settings_game.station.station_spread) return CMD_ERROR;
01129 
01130   /* these values are those that will be stored in train_tile and station_platforms */
01131   TileArea new_location(tile_org, w_org, h_org);
01132 
01133   /* Make sure the area below consists of clear tiles. (OR tiles belonging to a certain rail station) */
01134   StationID est = INVALID_STATION;
01135   SmallVector<Train *, 4> affected_vehicles;
01136   /* Clear the land below the station. */
01137   CommandCost cost = CheckFlatLandRailStation(TileArea(tile_org, w_org, h_org), flags, axis, &est, rt, affected_vehicles, spec_class, spec_index, plat_len, numtracks);
01138   if (cost.Failed()) return cost;
01139   /* Add construction expenses. */
01140   cost.AddCost((numtracks * _price[PR_BUILD_STATION_RAIL] + _price[PR_BUILD_STATION_RAIL_LENGTH]) * plat_len);
01141   cost.AddCost(numtracks * plat_len * RailBuildCost(rt));
01142 
01143   Station *st = NULL;
01144   ret = FindJoiningStation(est, station_to_join, adjacent, new_location, &st);
01145   if (ret.Failed()) return ret;
01146 
01147   /* See if there is a deleted station close to us. */
01148   if (st == NULL && reuse) st = GetClosestDeletedStation(tile_org);
01149 
01150   if (st != NULL) {
01151     /* Reuse an existing station. */
01152     if (st->owner != _current_company) return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
01153 
01154     if (st->train_station.tile != INVALID_TILE) {
01155       CommandCost ret = CanExpandRailStation(st, new_location, axis);
01156       if (ret.Failed()) return ret;
01157     }
01158 
01159     /* XXX can't we pack this in the "else" part of the if above? */
01160     CommandCost ret = st->rect.BeforeAddRect(tile_org, w_org, h_org, StationRect::ADD_TEST);
01161     if (ret.Failed()) return ret;
01162   } else {
01163     /* allocate and initialize new station */
01164     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
01165 
01166     if (flags & DC_EXEC) {
01167       st = new Station(tile_org);
01168 
01169       st->town = ClosestTownFromTile(tile_org, UINT_MAX);
01170       st->string_id = GenerateStationName(st, tile_org, STATIONNAMING_RAIL);
01171 
01172       if (Company::IsValidID(_current_company)) {
01173         SetBit(st->town->have_ratings, _current_company);
01174       }
01175     }
01176   }
01177 
01178   /* Check if we can allocate a custom stationspec to this station */
01179   const StationSpec *statspec = StationClass::Get(spec_class, spec_index);
01180   int specindex = AllocateSpecToStation(statspec, st, (flags & DC_EXEC) != 0);
01181   if (specindex == -1) return_cmd_error(STR_ERROR_TOO_MANY_STATION_SPECS);
01182 
01183   if (statspec != NULL) {
01184     /* Perform NewStation checks */
01185 
01186     /* Check if the station size is permitted */
01187     if (HasBit(statspec->disallowed_platforms, numtracks - 1) || HasBit(statspec->disallowed_lengths, plat_len - 1)) {
01188       return CMD_ERROR;
01189     }
01190 
01191     /* Check if the station is buildable */
01192     if (HasBit(statspec->callback_mask, CBM_STATION_AVAIL)) {
01193       uint16 cb_res = GetStationCallback(CBID_STATION_AVAILABILITY, 0, 0, statspec, NULL, INVALID_TILE);
01194       if (cb_res != CALLBACK_FAILED && !Convert8bitBooleanCallback(statspec->grf_prop.grffile, CBID_STATION_AVAILABILITY, cb_res)) return CMD_ERROR;
01195     }
01196   }
01197 
01198   if (flags & DC_EXEC) {
01199     TileIndexDiff tile_delta;
01200     byte *layout_ptr;
01201     byte numtracks_orig;
01202     Track track;
01203 
01204     st->train_station = new_location;
01205     st->AddFacility(FACIL_TRAIN, new_location.tile);
01206 
01207     st->rect.BeforeAddRect(tile_org, w_org, h_org, StationRect::ADD_TRY);
01208 
01209     if (statspec != NULL) {
01210       /* Include this station spec's animation trigger bitmask
01211        * in the station's cached copy. */
01212       st->cached_anim_triggers |= statspec->animation.triggers;
01213     }
01214 
01215     tile_delta = (axis == AXIS_X ? TileDiffXY(1, 0) : TileDiffXY(0, 1));
01216     track = AxisToTrack(axis);
01217 
01218     layout_ptr = AllocaM(byte, numtracks * plat_len);
01219     GetStationLayout(layout_ptr, numtracks, plat_len, statspec);
01220 
01221     numtracks_orig = numtracks;
01222 
01223     Company *c = Company::Get(st->owner);
01224     do {
01225       TileIndex tile = tile_org;
01226       int w = plat_len;
01227       do {
01228         byte layout = *layout_ptr++;
01229         if (IsRailStationTile(tile) && HasStationReservation(tile)) {
01230           /* Check for trains having a reservation for this tile. */
01231           Train *v = GetTrainForReservation(tile, AxisToTrack(GetRailStationAxis(tile)));
01232           if (v != NULL) {
01233             FreeTrainTrackReservation(v);
01234             *affected_vehicles.Append() = v;
01235             if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), false);
01236             for (; v->Next() != NULL; v = v->Next()) { }
01237             if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), false);
01238           }
01239         }
01240 
01241         /* Railtype can change when overbuilding. */
01242         if (IsRailStationTile(tile)) {
01243           if (!IsStationTileBlocked(tile)) c->infrastructure.rail[GetRailType(tile)]--;
01244           c->infrastructure.station--;
01245         }
01246 
01247         /* Remove animation if overbuilding */
01248         DeleteAnimatedTile(tile);
01249         byte old_specindex = HasStationTileRail(tile) ? GetCustomStationSpecIndex(tile) : 0;
01250         MakeRailStation(tile, st->owner, st->index, axis, layout & ~1, rt);
01251         /* Free the spec if we overbuild something */
01252         DeallocateSpecFromStation(st, old_specindex);
01253 
01254         SetCustomStationSpecIndex(tile, specindex);
01255         SetStationTileRandomBits(tile, GB(Random(), 0, 4));
01256         SetAnimationFrame(tile, 0);
01257 
01258         if (!IsStationTileBlocked(tile)) c->infrastructure.rail[rt]++;
01259         c->infrastructure.station++;
01260 
01261         if (statspec != NULL) {
01262           /* Use a fixed axis for GetPlatformInfo as our platforms / numtracks are always the right way around */
01263           uint32 platinfo = GetPlatformInfo(AXIS_X, 0, plat_len, numtracks_orig, plat_len - w, numtracks_orig - numtracks, false);
01264 
01265           /* As the station is not yet completely finished, the station does not yet exist. */
01266           uint16 callback = GetStationCallback(CBID_STATION_TILE_LAYOUT, platinfo, 0, statspec, NULL, tile);
01267           if (callback != CALLBACK_FAILED) {
01268             if (callback < 8) {
01269               SetStationGfx(tile, (callback & ~1) + axis);
01270             } else {
01271               ErrorUnknownCallbackResult(statspec->grf_prop.grffile->grfid, CBID_STATION_TILE_LAYOUT, callback);
01272             }
01273           }
01274 
01275           /* Trigger station animation -- after building? */
01276           TriggerStationAnimation(st, tile, SAT_BUILT);
01277         }
01278 
01279         tile += tile_delta;
01280       } while (--w);
01281       AddTrackToSignalBuffer(tile_org, track, _current_company);
01282       YapfNotifyTrackLayoutChange(tile_org, track);
01283       tile_org += tile_delta ^ TileDiffXY(1, 1); // perpendicular to tile_delta
01284     } while (--numtracks);
01285 
01286     for (uint i = 0; i < affected_vehicles.Length(); ++i) {
01287       /* Restore reservations of trains. */
01288       Train *v = affected_vehicles[i];
01289       if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), true);
01290       TryPathReserve(v, true, true);
01291       for (; v->Next() != NULL; v = v->Next()) { }
01292       if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), true);
01293     }
01294 
01295     st->MarkTilesDirty(false);
01296     st->UpdateVirtCoord();
01297     UpdateStationAcceptance(st, false);
01298     st->RecomputeIndustriesNear();
01299     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
01300     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
01301     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
01302     DirtyCompanyInfrastructureWindows(st->owner);
01303   }
01304 
01305   return cost;
01306 }
01307 
01308 static void MakeRailStationAreaSmaller(BaseStation *st)
01309 {
01310   TileArea ta = st->train_station;
01311 
01312 restart:
01313 
01314   /* too small? */
01315   if (ta.w != 0 && ta.h != 0) {
01316     /* check the left side, x = constant, y changes */
01317     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(0, i));) {
01318       /* the left side is unused? */
01319       if (++i == ta.h) {
01320         ta.tile += TileDiffXY(1, 0);
01321         ta.w--;
01322         goto restart;
01323       }
01324     }
01325 
01326     /* check the right side, x = constant, y changes */
01327     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(ta.w - 1, i));) {
01328       /* the right side is unused? */
01329       if (++i == ta.h) {
01330         ta.w--;
01331         goto restart;
01332       }
01333     }
01334 
01335     /* check the upper side, y = constant, x changes */
01336     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(i, 0));) {
01337       /* the left side is unused? */
01338       if (++i == ta.w) {
01339         ta.tile += TileDiffXY(0, 1);
01340         ta.h--;
01341         goto restart;
01342       }
01343     }
01344 
01345     /* check the lower side, y = constant, x changes */
01346     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(i, ta.h - 1));) {
01347       /* the left side is unused? */
01348       if (++i == ta.w) {
01349         ta.h--;
01350         goto restart;
01351       }
01352     }
01353   } else {
01354     ta.Clear();
01355   }
01356 
01357   st->train_station = ta;
01358 }
01359 
01370 template <class T>
01371 CommandCost RemoveFromRailBaseStation(TileArea ta, SmallVector<T *, 4> &affected_stations, DoCommandFlag flags, Money removal_cost, bool keep_rail)
01372 {
01373   /* Count of the number of tiles removed */
01374   int quantity = 0;
01375   CommandCost total_cost(EXPENSES_CONSTRUCTION);
01376 
01377   /* Do the action for every tile into the area */
01378   TILE_AREA_LOOP(tile, ta) {
01379     /* Make sure the specified tile is a rail station */
01380     if (!HasStationTileRail(tile)) continue;
01381 
01382     /* If there is a vehicle on ground, do not allow to remove (flood) the tile */
01383     CommandCost ret = EnsureNoVehicleOnGround(tile);
01384     if (ret.Failed()) continue;
01385 
01386     /* Check ownership of station */
01387     T *st = T::GetByTile(tile);
01388     if (st == NULL) continue;
01389 
01390     if (_current_company != OWNER_WATER) {
01391       CommandCost ret = CheckOwnership(st->owner);
01392       if (ret.Failed()) continue;
01393     }
01394 
01395     /* If we reached here, the tile is valid so increase the quantity of tiles we will remove */
01396     quantity++;
01397 
01398     if (keep_rail || IsStationTileBlocked(tile)) {
01399       /* Don't refund the 'steel' of the track when we keep the
01400        *  rail, or when the tile didn't have any rail at all. */
01401       total_cost.AddCost(-_price[PR_CLEAR_RAIL]);
01402     }
01403 
01404     if (flags & DC_EXEC) {
01405       /* read variables before the station tile is removed */
01406       uint specindex = GetCustomStationSpecIndex(tile);
01407       Track track = GetRailStationTrack(tile);
01408       Owner owner = GetTileOwner(tile);
01409       RailType rt = GetRailType(tile);
01410       Train *v = NULL;
01411 
01412       if (HasStationReservation(tile)) {
01413         v = GetTrainForReservation(tile, track);
01414         if (v != NULL) {
01415           /* Free train reservation. */
01416           FreeTrainTrackReservation(v);
01417           if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), false);
01418           Vehicle *temp = v;
01419           for (; temp->Next() != NULL; temp = temp->Next()) { }
01420           if (IsRailStationTile(temp->tile)) SetRailStationPlatformReservation(temp->tile, TrackdirToExitdir(ReverseTrackdir(temp->GetVehicleTrackdir())), false);
01421         }
01422       }
01423 
01424       bool build_rail = keep_rail && !IsStationTileBlocked(tile);
01425       if (!build_rail && !IsStationTileBlocked(tile)) Company::Get(owner)->infrastructure.rail[rt]--;
01426 
01427       DoClearSquare(tile);
01428       DeleteNewGRFInspectWindow(GSF_STATIONS, tile);
01429       if (build_rail) MakeRailNormal(tile, owner, TrackToTrackBits(track), rt);
01430       Company::Get(owner)->infrastructure.station--;
01431       DirtyCompanyInfrastructureWindows(owner);
01432 
01433       st->rect.AfterRemoveTile(st, tile);
01434       AddTrackToSignalBuffer(tile, track, owner);
01435       YapfNotifyTrackLayoutChange(tile, track);
01436 
01437       DeallocateSpecFromStation(st, specindex);
01438 
01439       affected_stations.Include(st);
01440 
01441       if (v != NULL) {
01442         /* Restore station reservation. */
01443         if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), true);
01444         TryPathReserve(v, true, true);
01445         for (; v->Next() != NULL; v = v->Next()) { }
01446         if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), true);
01447       }
01448     }
01449   }
01450 
01451   if (quantity == 0) return_cmd_error(STR_ERROR_THERE_IS_NO_STATION);
01452 
01453   for (T **stp = affected_stations.Begin(); stp != affected_stations.End(); stp++) {
01454     T *st = *stp;
01455 
01456     /* now we need to make the "spanned" area of the railway station smaller
01457      * if we deleted something at the edges.
01458      * we also need to adjust train_tile. */
01459     MakeRailStationAreaSmaller(st);
01460     UpdateStationSignCoord(st);
01461 
01462     /* if we deleted the whole station, delete the train facility. */
01463     if (st->train_station.tile == INVALID_TILE) {
01464       st->facilities &= ~FACIL_TRAIN;
01465       SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
01466       st->UpdateVirtCoord();
01467       DeleteStationIfEmpty(st);
01468     }
01469   }
01470 
01471   total_cost.AddCost(quantity * removal_cost);
01472   return total_cost;
01473 }
01474 
01486 CommandCost CmdRemoveFromRailStation(TileIndex start, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01487 {
01488   TileIndex end = p1 == 0 ? start : p1;
01489   if (start >= MapSize() || end >= MapSize()) return CMD_ERROR;
01490 
01491   TileArea ta(start, end);
01492   SmallVector<Station *, 4> affected_stations;
01493 
01494   CommandCost ret = RemoveFromRailBaseStation(ta, affected_stations, flags, _price[PR_CLEAR_STATION_RAIL], HasBit(p2, 0));
01495   if (ret.Failed()) return ret;
01496 
01497   /* Do all station specific functions here. */
01498   for (Station **stp = affected_stations.Begin(); stp != affected_stations.End(); stp++) {
01499     Station *st = *stp;
01500 
01501     if (st->train_station.tile == INVALID_TILE) SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
01502     st->MarkTilesDirty(false);
01503     st->RecomputeIndustriesNear();
01504   }
01505 
01506   /* Now apply the rail cost to the number that we deleted */
01507   return ret;
01508 }
01509 
01521 CommandCost CmdRemoveFromRailWaypoint(TileIndex start, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01522 {
01523   TileIndex end = p1 == 0 ? start : p1;
01524   if (start >= MapSize() || end >= MapSize()) return CMD_ERROR;
01525 
01526   TileArea ta(start, end);
01527   SmallVector<Waypoint *, 4> affected_stations;
01528 
01529   return RemoveFromRailBaseStation(ta, affected_stations, flags, _price[PR_CLEAR_WAYPOINT_RAIL], HasBit(p2, 0));
01530 }
01531 
01532 
01540 template <class T>
01541 CommandCost RemoveRailStation(T *st, DoCommandFlag flags)
01542 {
01543   /* Current company owns the station? */
01544   if (_current_company != OWNER_WATER) {
01545     CommandCost ret = CheckOwnership(st->owner);
01546     if (ret.Failed()) return ret;
01547   }
01548 
01549   /* determine width and height of platforms */
01550   TileArea ta = st->train_station;
01551 
01552   assert(ta.w != 0 && ta.h != 0);
01553 
01554   CommandCost cost(EXPENSES_CONSTRUCTION);
01555   /* clear all areas of the station */
01556   TILE_AREA_LOOP(tile, ta) {
01557     /* only remove tiles that are actually train station tiles */
01558     if (!st->TileBelongsToRailStation(tile)) continue;
01559 
01560     CommandCost ret = EnsureNoVehicleOnGround(tile);
01561     if (ret.Failed()) return ret;
01562 
01563     cost.AddCost(_price[PR_CLEAR_STATION_RAIL]);
01564     if (flags & DC_EXEC) {
01565       /* read variables before the station tile is removed */
01566       Track track = GetRailStationTrack(tile);
01567       Owner owner = GetTileOwner(tile); // _current_company can be OWNER_WATER
01568       Train *v = NULL;
01569       if (HasStationReservation(tile)) {
01570         v = GetTrainForReservation(tile, track);
01571         if (v != NULL) FreeTrainTrackReservation(v);
01572       }
01573       if (!IsStationTileBlocked(tile)) Company::Get(owner)->infrastructure.rail[GetRailType(tile)]--;
01574       Company::Get(owner)->infrastructure.station--;
01575       DoClearSquare(tile);
01576       DeleteNewGRFInspectWindow(GSF_STATIONS, tile);
01577       AddTrackToSignalBuffer(tile, track, owner);
01578       YapfNotifyTrackLayoutChange(tile, track);
01579       if (v != NULL) TryPathReserve(v, true);
01580     }
01581   }
01582 
01583   if (flags & DC_EXEC) {
01584     st->rect.AfterRemoveRect(st, st->train_station);
01585 
01586     st->train_station.Clear();
01587 
01588     st->facilities &= ~FACIL_TRAIN;
01589 
01590     free(st->speclist);
01591     st->num_specs = 0;
01592     st->speclist  = NULL;
01593     st->cached_anim_triggers = 0;
01594 
01595     DirtyCompanyInfrastructureWindows(st->owner);
01596     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
01597     st->UpdateVirtCoord();
01598     DeleteStationIfEmpty(st);
01599   }
01600 
01601   return cost;
01602 }
01603 
01610 static CommandCost RemoveRailStation(TileIndex tile, DoCommandFlag flags)
01611 {
01612   /* if there is flooding, remove platforms tile by tile */
01613   if (_current_company == OWNER_WATER) {
01614     return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAIL_STATION);
01615   }
01616 
01617   Station *st = Station::GetByTile(tile);
01618   CommandCost cost = RemoveRailStation(st, flags);
01619 
01620   if (flags & DC_EXEC) st->RecomputeIndustriesNear();
01621 
01622   return cost;
01623 }
01624 
01631 static CommandCost RemoveRailWaypoint(TileIndex tile, DoCommandFlag flags)
01632 {
01633   /* if there is flooding, remove waypoints tile by tile */
01634   if (_current_company == OWNER_WATER) {
01635     return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAIL_WAYPOINT);
01636   }
01637 
01638   return RemoveRailStation(Waypoint::GetByTile(tile), flags);
01639 }
01640 
01641 
01647 static RoadStop **FindRoadStopSpot(bool truck_station, Station *st)
01648 {
01649   RoadStop **primary_stop = (truck_station) ? &st->truck_stops : &st->bus_stops;
01650 
01651   if (*primary_stop == NULL) {
01652     /* we have no roadstop of the type yet, so write a "primary stop" */
01653     return primary_stop;
01654   } else {
01655     /* there are stops already, so append to the end of the list */
01656     RoadStop *stop = *primary_stop;
01657     while (stop->next != NULL) stop = stop->next;
01658     return &stop->next;
01659   }
01660 }
01661 
01662 static CommandCost RemoveRoadStop(TileIndex tile, DoCommandFlag flags);
01663 
01673 static CommandCost FindJoiningRoadStop(StationID existing_stop, StationID station_to_join, bool adjacent, TileArea ta, Station **st)
01674 {
01675   return FindJoiningBaseStation<Station, STR_ERROR_MUST_REMOVE_ROAD_STOP_FIRST>(existing_stop, station_to_join, adjacent, ta, st);
01676 }
01677 
01693 CommandCost CmdBuildRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01694 {
01695   bool type = HasBit(p2, 0);
01696   bool is_drive_through = HasBit(p2, 1);
01697   RoadTypes rts = Extract<RoadTypes, 2, 2>(p2);
01698   StationID station_to_join = GB(p2, 16, 16);
01699   bool reuse = (station_to_join != NEW_STATION);
01700   if (!reuse) station_to_join = INVALID_STATION;
01701   bool distant_join = (station_to_join != INVALID_STATION);
01702 
01703   uint8 width = (uint8)GB(p1, 0, 8);
01704   uint8 lenght = (uint8)GB(p1, 8, 8);
01705 
01706   /* Check if the requested road stop is too big */
01707   if (width > _settings_game.station.station_spread || lenght > _settings_game.station.station_spread) return_cmd_error(STR_ERROR_STATION_TOO_SPREAD_OUT);
01708   /* Check for incorrect width / lenght. */
01709   if (width == 0 || lenght == 0) return CMD_ERROR;
01710   /* Check if the first tile and the last tile are valid */
01711   if (!IsValidTile(tile) || TileAddWrap(tile, width - 1, lenght - 1) == INVALID_TILE) return CMD_ERROR;
01712 
01713   TileArea roadstop_area(tile, width, lenght);
01714 
01715   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
01716 
01717   if (!HasExactlyOneBit(rts) || !HasRoadTypesAvail(_current_company, rts)) return CMD_ERROR;
01718 
01719   /* Trams only have drive through stops */
01720   if (!is_drive_through && HasBit(rts, ROADTYPE_TRAM)) return CMD_ERROR;
01721 
01722   DiagDirection ddir = Extract<DiagDirection, 6, 2>(p2);
01723 
01724   /* Safeguard the parameters. */
01725   if (!IsValidDiagDirection(ddir)) return CMD_ERROR;
01726   /* If it is a drive-through stop, check for valid axis. */
01727   if (is_drive_through && !IsValidAxis((Axis)ddir)) return CMD_ERROR;
01728 
01729   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile, flags);
01730   if (ret.Failed()) return ret;
01731 
01732   /* Total road stop cost. */
01733   CommandCost cost(EXPENSES_CONSTRUCTION, roadstop_area.w * roadstop_area.h * _price[type ? PR_BUILD_STATION_TRUCK : PR_BUILD_STATION_BUS]);
01734   StationID est = INVALID_STATION;
01735   ret = CheckFlatLandRoadStop(roadstop_area, flags, is_drive_through ? 5 << ddir : 1 << ddir, is_drive_through, type, DiagDirToAxis(ddir), &est, rts);
01736   if (ret.Failed()) return ret;
01737   cost.AddCost(ret);
01738 
01739   Station *st = NULL;
01740   ret = FindJoiningRoadStop(est, station_to_join, HasBit(p2, 5), roadstop_area, &st);
01741   if (ret.Failed()) return ret;
01742 
01743   /* Find a deleted station close to us */
01744   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
01745 
01746   /* Check if this number of road stops can be allocated. */
01747   if (!RoadStop::CanAllocateItem(roadstop_area.w * roadstop_area.h)) return_cmd_error(type ? STR_ERROR_TOO_MANY_TRUCK_STOPS : STR_ERROR_TOO_MANY_BUS_STOPS);
01748 
01749   if (st != NULL) {
01750     if (st->owner != _current_company) {
01751       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
01752     }
01753 
01754     CommandCost ret = st->rect.BeforeAddRect(roadstop_area.tile, roadstop_area.w, roadstop_area.h, StationRect::ADD_TEST);
01755     if (ret.Failed()) return ret;
01756   } else {
01757     /* allocate and initialize new station */
01758     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
01759 
01760     if (flags & DC_EXEC) {
01761       st = new Station(tile);
01762 
01763       st->town = ClosestTownFromTile(tile, UINT_MAX);
01764       st->string_id = GenerateStationName(st, tile, STATIONNAMING_ROAD);
01765 
01766       if (Company::IsValidID(_current_company)) {
01767         SetBit(st->town->have_ratings, _current_company);
01768       }
01769     }
01770   }
01771 
01772   if (flags & DC_EXEC) {
01773     /* Check every tile in the area. */
01774     TILE_AREA_LOOP(cur_tile, roadstop_area) {
01775       RoadTypes cur_rts = GetRoadTypes(cur_tile);
01776       Owner road_owner = HasBit(cur_rts, ROADTYPE_ROAD) ? GetRoadOwner(cur_tile, ROADTYPE_ROAD) : _current_company;
01777       Owner tram_owner = HasBit(cur_rts, ROADTYPE_TRAM) ? GetRoadOwner(cur_tile, ROADTYPE_TRAM) : _current_company;
01778 
01779       if (IsTileType(cur_tile, MP_STATION) && IsRoadStop(cur_tile)) {
01780         RemoveRoadStop(cur_tile, flags);
01781       }
01782 
01783       RoadStop *road_stop = new RoadStop(cur_tile);
01784       /* Insert into linked list of RoadStops. */
01785       RoadStop **currstop = FindRoadStopSpot(type, st);
01786       *currstop = road_stop;
01787 
01788       if (type) {
01789         st->truck_station.Add(cur_tile);
01790       } else {
01791         st->bus_station.Add(cur_tile);
01792       }
01793 
01794       /* Initialize an empty station. */
01795       st->AddFacility((type) ? FACIL_TRUCK_STOP : FACIL_BUS_STOP, cur_tile);
01796 
01797       st->rect.BeforeAddTile(cur_tile, StationRect::ADD_TRY);
01798 
01799       RoadStopType rs_type = type ? ROADSTOP_TRUCK : ROADSTOP_BUS;
01800       if (is_drive_through) {
01801         /* Update company infrastructure counts. If the current tile is a normal
01802          * road tile, count only the new road bits needed to get a full diagonal road. */
01803         RoadType rt;
01804         FOR_EACH_SET_ROADTYPE(rt, cur_rts | rts) {
01805           Company *c = Company::GetIfValid(IsNormalRoadTile(cur_tile) && HasBit(cur_rts, rt) ? GetRoadOwner(cur_tile, rt) : _current_company);
01806           if (c != NULL) {
01807             c->infrastructure.road[rt] += 2 - (IsNormalRoadTile(cur_tile) ? CountBits(GetRoadBits(cur_tile, rt)) : 0);
01808             DirtyCompanyInfrastructureWindows(c->index);
01809           }
01810         }
01811 
01812         MakeDriveThroughRoadStop(cur_tile, st->owner, road_owner, tram_owner, st->index, rs_type, rts | cur_rts, DiagDirToAxis(ddir));
01813         road_stop->MakeDriveThrough();
01814       } else {
01815         /* Non-drive-through stop never overbuild and always count as two road bits. */
01816         Company::Get(st->owner)->infrastructure.road[FIND_FIRST_BIT(rts)] += 2;
01817         MakeRoadStop(cur_tile, st->owner, st->index, rs_type, rts, ddir);
01818       }
01819       Company::Get(st->owner)->infrastructure.station++;
01820       DirtyCompanyInfrastructureWindows(st->owner);
01821 
01822       MarkTileDirtyByTile(cur_tile);
01823     }
01824   }
01825 
01826   if (st != NULL) {
01827     st->UpdateVirtCoord();
01828     UpdateStationAcceptance(st, false);
01829     st->RecomputeIndustriesNear();
01830     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
01831     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
01832     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_ROADVEHS);
01833   }
01834   return cost;
01835 }
01836 
01837 
01838 static Vehicle *ClearRoadStopStatusEnum(Vehicle *v, void *)
01839 {
01840   if (v->type == VEH_ROAD) {
01841     /* Okay... we are a road vehicle on a drive through road stop.
01842      * But that road stop has just been removed, so we need to make
01843      * sure we are in a valid state... however, vehicles can also
01844      * turn on road stop tiles, so only clear the 'road stop' state
01845      * bits and only when the state was 'in road stop', otherwise
01846      * we'll end up clearing the turn around bits. */
01847     RoadVehicle *rv = RoadVehicle::From(v);
01848     if (HasBit(rv->state, RVS_IN_DT_ROAD_STOP)) rv->state &= RVSB_ROAD_STOP_TRACKDIR_MASK;
01849   }
01850 
01851   return NULL;
01852 }
01853 
01854 
01861 static CommandCost RemoveRoadStop(TileIndex tile, DoCommandFlag flags)
01862 {
01863   Station *st = Station::GetByTile(tile);
01864 
01865   if (_current_company != OWNER_WATER) {
01866     CommandCost ret = CheckOwnership(st->owner);
01867     if (ret.Failed()) return ret;
01868   }
01869 
01870   bool is_truck = IsTruckStop(tile);
01871 
01872   RoadStop **primary_stop;
01873   RoadStop *cur_stop;
01874   if (is_truck) { // truck stop
01875     primary_stop = &st->truck_stops;
01876     cur_stop = RoadStop::GetByTile(tile, ROADSTOP_TRUCK);
01877   } else {
01878     primary_stop = &st->bus_stops;
01879     cur_stop = RoadStop::GetByTile(tile, ROADSTOP_BUS);
01880   }
01881 
01882   assert(cur_stop != NULL);
01883 
01884   /* don't do the check for drive-through road stops when company bankrupts */
01885   if (IsDriveThroughStopTile(tile) && (flags & DC_BANKRUPT)) {
01886     /* remove the 'going through road stop' status from all vehicles on that tile */
01887     if (flags & DC_EXEC) FindVehicleOnPos(tile, NULL, &ClearRoadStopStatusEnum);
01888   } else {
01889     CommandCost ret = EnsureNoVehicleOnGround(tile);
01890     if (ret.Failed()) return ret;
01891   }
01892 
01893   if (flags & DC_EXEC) {
01894     if (*primary_stop == cur_stop) {
01895       /* removed the first stop in the list */
01896       *primary_stop = cur_stop->next;
01897       /* removed the only stop? */
01898       if (*primary_stop == NULL) {
01899         st->facilities &= (is_truck ? ~FACIL_TRUCK_STOP : ~FACIL_BUS_STOP);
01900       }
01901     } else {
01902       /* tell the predecessor in the list to skip this stop */
01903       RoadStop *pred = *primary_stop;
01904       while (pred->next != cur_stop) pred = pred->next;
01905       pred->next = cur_stop->next;
01906     }
01907 
01908     /* Update company infrastructure counts. */
01909     RoadType rt;
01910     FOR_EACH_SET_ROADTYPE(rt, GetRoadTypes(tile)) {
01911       Company *c = Company::GetIfValid(GetRoadOwner(tile, rt));
01912       if (c != NULL) {
01913         c->infrastructure.road[rt] -= 2;
01914         DirtyCompanyInfrastructureWindows(c->index);
01915       }
01916     }
01917     Company::Get(st->owner)->infrastructure.station--;
01918 
01919     if (IsDriveThroughStopTile(tile)) {
01920       /* Clears the tile for us */
01921       cur_stop->ClearDriveThrough();
01922     } else {
01923       DoClearSquare(tile);
01924     }
01925 
01926     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_ROADVEHS);
01927     delete cur_stop;
01928 
01929     /* Make sure no vehicle is going to the old roadstop */
01930     RoadVehicle *v;
01931     FOR_ALL_ROADVEHICLES(v) {
01932       if (v->First() == v && v->current_order.IsType(OT_GOTO_STATION) &&
01933           v->dest_tile == tile) {
01934         v->dest_tile = v->GetOrderStationLocation(st->index);
01935       }
01936     }
01937 
01938     st->rect.AfterRemoveTile(st, tile);
01939 
01940     st->UpdateVirtCoord();
01941     st->RecomputeIndustriesNear();
01942     DeleteStationIfEmpty(st);
01943 
01944     /* Update the tile area of the truck/bus stop */
01945     if (is_truck) {
01946       st->truck_station.Clear();
01947       for (const RoadStop *rs = st->truck_stops; rs != NULL; rs = rs->next) st->truck_station.Add(rs->xy);
01948     } else {
01949       st->bus_station.Clear();
01950       for (const RoadStop *rs = st->bus_stops; rs != NULL; rs = rs->next) st->bus_station.Add(rs->xy);
01951     }
01952   }
01953 
01954   return CommandCost(EXPENSES_CONSTRUCTION, _price[is_truck ? PR_CLEAR_STATION_TRUCK : PR_CLEAR_STATION_BUS]);
01955 }
01956 
01967 CommandCost CmdRemoveRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01968 {
01969   uint8 width = (uint8)GB(p1, 0, 8);
01970   uint8 height = (uint8)GB(p1, 8, 8);
01971 
01972   /* Check for incorrect width / height. */
01973   if (width == 0 || height == 0) return CMD_ERROR;
01974   /* Check if the first tile and the last tile are valid */
01975   if (!IsValidTile(tile) || TileAddWrap(tile, width - 1, height - 1) == INVALID_TILE) return CMD_ERROR;
01976 
01977   TileArea roadstop_area(tile, width, height);
01978 
01979   int quantity = 0;
01980   CommandCost cost(EXPENSES_CONSTRUCTION);
01981   TILE_AREA_LOOP(cur_tile, roadstop_area) {
01982     /* Make sure the specified tile is a road stop of the correct type */
01983     if (!IsTileType(cur_tile, MP_STATION) || !IsRoadStop(cur_tile) || (uint32)GetRoadStopType(cur_tile) != GB(p2, 0, 1)) continue;
01984 
01985     /* Save the stop info before it is removed */
01986     bool is_drive_through = IsDriveThroughStopTile(cur_tile);
01987     RoadTypes rts = GetRoadTypes(cur_tile);
01988     RoadBits road_bits = IsDriveThroughStopTile(cur_tile) ?
01989         ((GetRoadStopDir(cur_tile) == DIAGDIR_NE) ? ROAD_X : ROAD_Y) :
01990         DiagDirToRoadBits(GetRoadStopDir(cur_tile));
01991 
01992     Owner road_owner = GetRoadOwner(cur_tile, ROADTYPE_ROAD);
01993     Owner tram_owner = GetRoadOwner(cur_tile, ROADTYPE_TRAM);
01994     CommandCost ret = RemoveRoadStop(cur_tile, flags);
01995     if (ret.Failed()) return ret;
01996     cost.AddCost(ret);
01997 
01998     quantity++;
01999     /* If the stop was a drive-through stop replace the road */
02000     if ((flags & DC_EXEC) && is_drive_through) {
02001       MakeRoadNormal(cur_tile, road_bits, rts, ClosestTownFromTile(cur_tile, UINT_MAX)->index,
02002           road_owner, tram_owner);
02003 
02004       /* Update company infrastructure counts. */
02005       RoadType rt;
02006       FOR_EACH_SET_ROADTYPE(rt, rts) {
02007         Company *c = Company::GetIfValid(GetRoadOwner(tile, rt));
02008         if (c != NULL) {
02009           c->infrastructure.road[rt] += CountBits(road_bits);
02010           DirtyCompanyInfrastructureWindows(c->index);
02011         }
02012       }
02013     }
02014   }
02015 
02016   if (quantity == 0) return_cmd_error(STR_ERROR_THERE_IS_NO_STATION);
02017 
02018   return cost;
02019 }
02020 
02028 static uint GetMinimalAirportDistanceToTile(const AirportSpec *as, TileIndex town_tile, TileIndex airport_tile)
02029 {
02030   uint ttx = TileX(town_tile); // X, Y of town
02031   uint tty = TileY(town_tile);
02032 
02033   uint atx = TileX(airport_tile); // X, Y of northern airport corner
02034   uint aty = TileY(airport_tile);
02035 
02036   uint btx = TileX(airport_tile) + as->size_x - 1; // X, Y of southern corner
02037   uint bty = TileY(airport_tile) + as->size_y - 1;
02038 
02039   /* if ttx < atx, dx = atx - ttx
02040    * if atx <= ttx <= btx, dx = 0
02041    * else, dx = ttx - btx (similiar for dy) */
02042   uint dx = ttx < atx ? atx - ttx : (ttx <= btx ? 0 : ttx - btx);
02043   uint dy = tty < aty ? aty - tty : (tty <= bty ? 0 : tty - bty);
02044 
02045   return dx + dy;
02046 }
02047 
02057 uint8 GetAirportNoiseLevelForTown(const AirportSpec *as, TileIndex town_tile, TileIndex tile)
02058 {
02059   /* 0 cannot be accounted, and 1 is the lowest that can be reduced from town.
02060    * So no need to go any further*/
02061   if (as->noise_level < 2) return as->noise_level;
02062 
02063   uint distance = GetMinimalAirportDistanceToTile(as, town_tile, tile);
02064 
02065   /* The steps for measuring noise reduction are based on the "magical" (and arbitrary) 8 base distance
02066    * adding the town_council_tolerance 4 times, as a way to graduate, depending of the tolerance.
02067    * Basically, it says that the less tolerant a town is, the bigger the distance before
02068    * an actual decrease can be granted */
02069   uint8 town_tolerance_distance = 8 + (_settings_game.difficulty.town_council_tolerance * 4);
02070 
02071   /* now, we want to have the distance segmented using the distance judged bareable by town
02072    * This will give us the coefficient of reduction the distance provides. */
02073   uint noise_reduction = distance / town_tolerance_distance;
02074 
02075   /* If the noise reduction equals the airport noise itself, don't give it for free.
02076    * Otherwise, simply reduce the airport's level. */
02077   return noise_reduction >= as->noise_level ? 1 : as->noise_level - noise_reduction;
02078 }
02079 
02087 Town *AirportGetNearestTown(const AirportSpec *as, TileIndex airport_tile)
02088 {
02089   Town *t, *nearest = NULL;
02090   uint add = as->size_x + as->size_y - 2; // GetMinimalAirportDistanceToTile can differ from DistanceManhattan by this much
02091   uint mindist = UINT_MAX - add; // prevent overflow
02092   FOR_ALL_TOWNS(t) {
02093     if (DistanceManhattan(t->xy, airport_tile) < mindist + add) { // avoid calling GetMinimalAirportDistanceToTile too often
02094       uint dist = GetMinimalAirportDistanceToTile(as, t->xy, airport_tile);
02095       if (dist < mindist) {
02096         nearest = t;
02097         mindist = dist;
02098       }
02099     }
02100   }
02101 
02102   return nearest;
02103 }
02104 
02105 
02107 void UpdateAirportsNoise()
02108 {
02109   Town *t;
02110   const Station *st;
02111 
02112   FOR_ALL_TOWNS(t) t->noise_reached = 0;
02113 
02114   FOR_ALL_STATIONS(st) {
02115     if (st->airport.tile != INVALID_TILE) {
02116       const AirportSpec *as = st->airport.GetSpec();
02117       Town *nearest = AirportGetNearestTown(as, st->airport.tile);
02118       nearest->noise_reached += GetAirportNoiseLevelForTown(as, nearest->xy, st->airport.tile);
02119     }
02120   }
02121 }
02122 
02136 CommandCost CmdBuildAirport(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
02137 {
02138   StationID station_to_join = GB(p2, 16, 16);
02139   bool reuse = (station_to_join != NEW_STATION);
02140   if (!reuse) station_to_join = INVALID_STATION;
02141   bool distant_join = (station_to_join != INVALID_STATION);
02142   byte airport_type = GB(p1, 0, 8);
02143   byte layout = GB(p1, 8, 8);
02144 
02145   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
02146 
02147   if (airport_type >= NUM_AIRPORTS) return CMD_ERROR;
02148 
02149   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile, flags);
02150   if (ret.Failed()) return ret;
02151 
02152   /* Check if a valid, buildable airport was chosen for construction */
02153   const AirportSpec *as = AirportSpec::Get(airport_type);
02154   if (!as->IsAvailable() || layout >= as->num_table) return CMD_ERROR;
02155 
02156   Direction rotation = as->rotation[layout];
02157   Town *t = ClosestTownFromTile(tile, UINT_MAX);
02158   int w = as->size_x;
02159   int h = as->size_y;
02160   if (rotation == DIR_E || rotation == DIR_W) Swap(w, h);
02161 
02162   if (w > _settings_game.station.station_spread || h > _settings_game.station.station_spread) {
02163     return_cmd_error(STR_ERROR_STATION_TOO_SPREAD_OUT);
02164   }
02165 
02166   CommandCost cost = CheckFlatLand(TileArea(tile, w, h), flags);
02167   if (cost.Failed()) return cost;
02168 
02169   /* The noise level is the noise from the airport and reduce it to account for the distance to the town center. */
02170   Town *nearest = AirportGetNearestTown(as, tile);
02171   uint newnoise_level = GetAirportNoiseLevelForTown(as, nearest->xy, tile);
02172 
02173   /* Check if local auth would allow a new airport */
02174   StringID authority_refuse_message = STR_NULL;
02175 
02176   if (_settings_game.economy.station_noise_level) {
02177     /* do not allow to build a new airport if this raise the town noise over the maximum allowed by town */
02178     if ((nearest->noise_reached + newnoise_level) > nearest->MaxTownNoise()) {
02179       authority_refuse_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_NOISE;
02180     }
02181   } else {
02182     uint num = 0;
02183     const Station *st;
02184     FOR_ALL_STATIONS(st) {
02185       if (st->town == t && (st->facilities & FACIL_AIRPORT) && st->airport.type != AT_OILRIG) num++;
02186     }
02187     if (num >= 2) {
02188       authority_refuse_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_AIRPORT;
02189     }
02190   }
02191 
02192   if (authority_refuse_message != STR_NULL) {
02193     SetDParam(0, t->index);
02194     return_cmd_error(authority_refuse_message);
02195   }
02196 
02197   Station *st = NULL;
02198   ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p2, 0), TileArea(tile, w, h), &st);
02199   if (ret.Failed()) return ret;
02200 
02201   /* Distant join */
02202   if (st == NULL && distant_join) st = Station::GetIfValid(station_to_join);
02203 
02204   /* Find a deleted station close to us */
02205   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
02206 
02207   if (st != NULL) {
02208     if (st->owner != _current_company) {
02209       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
02210     }
02211 
02212     CommandCost ret = st->rect.BeforeAddRect(tile, w, h, StationRect::ADD_TEST);
02213     if (ret.Failed()) return ret;
02214 
02215     if (st->airport.tile != INVALID_TILE) {
02216       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_AIRPORT);
02217     }
02218   } else {
02219     /* allocate and initialize new station */
02220     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
02221 
02222     if (flags & DC_EXEC) {
02223       st = new Station(tile);
02224 
02225       st->town = t;
02226       st->string_id = GenerateStationName(st, tile, !(GetAirport(airport_type)->flags & AirportFTAClass::AIRPLANES) ? STATIONNAMING_HELIPORT : STATIONNAMING_AIRPORT);
02227 
02228       if (Company::IsValidID(_current_company)) {
02229         SetBit(st->town->have_ratings, _current_company);
02230       }
02231     }
02232   }
02233 
02234   const AirportTileTable *it = as->table[layout];
02235   do {
02236     cost.AddCost(_price[PR_BUILD_STATION_AIRPORT]);
02237   } while ((++it)->ti.x != -0x80);
02238 
02239   if (flags & DC_EXEC) {
02240     /* Always add the noise, so there will be no need to recalculate when option toggles */
02241     nearest->noise_reached += newnoise_level;
02242 
02243     st->AddFacility(FACIL_AIRPORT, tile);
02244     st->airport.type = airport_type;
02245     st->airport.layout = layout;
02246     st->airport.flags = 0;
02247     st->airport.rotation = rotation;
02248 
02249     st->rect.BeforeAddRect(tile, w, h, StationRect::ADD_TRY);
02250 
02251     it = as->table[layout];
02252     do {
02253       TileIndex cur_tile = tile + ToTileIndexDiff(it->ti);
02254       MakeAirport(cur_tile, st->owner, st->index, it->gfx, WATER_CLASS_INVALID);
02255       SetStationTileRandomBits(cur_tile, GB(Random(), 0, 4));
02256       st->airport.Add(cur_tile);
02257 
02258       if (AirportTileSpec::Get(GetTranslatedAirportTileID(it->gfx))->animation.status != ANIM_STATUS_NO_ANIMATION) AddAnimatedTile(cur_tile);
02259     } while ((++it)->ti.x != -0x80);
02260 
02261     /* Only call the animation trigger after all tiles have been built */
02262     it = as->table[layout];
02263     do {
02264       TileIndex cur_tile = tile + ToTileIndexDiff(it->ti);
02265       AirportTileAnimationTrigger(st, cur_tile, AAT_BUILT);
02266     } while ((++it)->ti.x != -0x80);
02267 
02268     UpdateAirplanesOnNewStation(st);
02269 
02270     Company::Get(st->owner)->infrastructure.airport++;
02271     DirtyCompanyInfrastructureWindows(st->owner);
02272 
02273     st->UpdateVirtCoord();
02274     UpdateStationAcceptance(st, false);
02275     st->RecomputeIndustriesNear();
02276     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
02277     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
02278     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_PLANES);
02279 
02280     if (_settings_game.economy.station_noise_level) {
02281       SetWindowDirty(WC_TOWN_VIEW, st->town->index);
02282     }
02283   }
02284 
02285   return cost;
02286 }
02287 
02294 static CommandCost RemoveAirport(TileIndex tile, DoCommandFlag flags)
02295 {
02296   Station *st = Station::GetByTile(tile);
02297 
02298   if (_current_company != OWNER_WATER) {
02299     CommandCost ret = CheckOwnership(st->owner);
02300     if (ret.Failed()) return ret;
02301   }
02302 
02303   tile = st->airport.tile;
02304 
02305   CommandCost cost(EXPENSES_CONSTRUCTION);
02306 
02307   const Aircraft *a;
02308   FOR_ALL_AIRCRAFT(a) {
02309     if (!a->IsNormalAircraft()) continue;
02310     if (a->targetairport == st->index && a->state != FLYING) return CMD_ERROR;
02311   }
02312 
02313   TILE_AREA_LOOP(tile_cur, st->airport) {
02314     if (!st->TileBelongsToAirport(tile_cur)) continue;
02315 
02316     CommandCost ret = EnsureNoVehicleOnGround(tile_cur);
02317     if (ret.Failed()) return ret;
02318 
02319     cost.AddCost(_price[PR_CLEAR_STATION_AIRPORT]);
02320 
02321     if (flags & DC_EXEC) {
02322       if (IsHangarTile(tile_cur)) OrderBackup::Reset(tile_cur, false);
02323       DeleteAnimatedTile(tile_cur);
02324       DoClearSquare(tile_cur);
02325       DeleteNewGRFInspectWindow(GSF_AIRPORTTILES, tile_cur);
02326     }
02327   }
02328 
02329   if (flags & DC_EXEC) {
02330     /* Clear the persistent storage. */
02331     delete st->airport.psa;
02332 
02333     const AirportSpec *as = st->airport.GetSpec();
02334     for (uint i = 0; i < st->airport.GetNumHangars(); ++i) {
02335       DeleteWindowById(
02336         WC_VEHICLE_DEPOT, st->airport.GetHangarTile(i)
02337       );
02338     }
02339 
02340     /* The noise level is the noise from the airport and reduce it to account for the distance to the town center.
02341      * And as for construction, always remove it, even if the setting is not set, in order to avoid the
02342      * need of recalculation */
02343     Town *nearest = AirportGetNearestTown(as, tile);
02344     nearest->noise_reached -= GetAirportNoiseLevelForTown(as, nearest->xy, tile);
02345 
02346     st->rect.AfterRemoveRect(st, st->airport);
02347 
02348     st->airport.Clear();
02349     st->facilities &= ~FACIL_AIRPORT;
02350 
02351     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_PLANES);
02352 
02353     if (_settings_game.economy.station_noise_level) {
02354       SetWindowDirty(WC_TOWN_VIEW, st->town->index);
02355     }
02356 
02357     Company::Get(st->owner)->infrastructure.airport--;
02358     DirtyCompanyInfrastructureWindows(st->owner);
02359 
02360     st->UpdateVirtCoord();
02361     st->RecomputeIndustriesNear();
02362     DeleteStationIfEmpty(st);
02363     DeleteNewGRFInspectWindow(GSF_AIRPORTS, st->index);
02364   }
02365 
02366   return cost;
02367 }
02368 
02375 bool HasStationInUse(StationID station, bool include_company, CompanyID company)
02376 {
02377   const Vehicle *v;
02378   FOR_ALL_VEHICLES(v) {
02379     if ((v->owner == company) == include_company) {
02380       const Order *order;
02381       FOR_VEHICLE_ORDERS(v, order) {
02382         if ((order->IsType(OT_GOTO_STATION) || order->IsType(OT_GOTO_WAYPOINT)) && order->GetDestination() == station) {
02383           return true;
02384         }
02385       }
02386     }
02387   }
02388   return false;
02389 }
02390 
02391 static const TileIndexDiffC _dock_tileoffs_chkaround[] = {
02392   {-1,  0},
02393   { 0,  0},
02394   { 0,  0},
02395   { 0, -1}
02396 };
02397 static const byte _dock_w_chk[4] = { 2, 1, 2, 1 };
02398 static const byte _dock_h_chk[4] = { 1, 2, 1, 2 };
02399 
02409 CommandCost CmdBuildDock(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
02410 {
02411   StationID station_to_join = GB(p2, 16, 16);
02412   bool reuse = (station_to_join != NEW_STATION);
02413   if (!reuse) station_to_join = INVALID_STATION;
02414   bool distant_join = (station_to_join != INVALID_STATION);
02415 
02416   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
02417 
02418   DiagDirection direction = GetInclinedSlopeDirection(GetTileSlope(tile));
02419   if (direction == INVALID_DIAGDIR) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02420   direction = ReverseDiagDir(direction);
02421 
02422   /* Docks cannot be placed on rapids */
02423   if (HasTileWaterGround(tile)) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02424 
02425   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile, flags);
02426   if (ret.Failed()) return ret;
02427 
02428   if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
02429 
02430   ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
02431   if (ret.Failed()) return ret;
02432 
02433   TileIndex tile_cur = tile + TileOffsByDiagDir(direction);
02434 
02435   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur) != SLOPE_FLAT) {
02436     return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02437   }
02438 
02439   if (MayHaveBridgeAbove(tile_cur) && IsBridgeAbove(tile_cur)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
02440 
02441   /* Get the water class of the water tile before it is cleared.*/
02442   WaterClass wc = GetWaterClass(tile_cur);
02443 
02444   ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
02445   if (ret.Failed()) return ret;
02446 
02447   tile_cur += TileOffsByDiagDir(direction);
02448   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur) != SLOPE_FLAT) {
02449     return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02450   }
02451 
02452   /* middle */
02453   Station *st = NULL;
02454   ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p1, 0),
02455       TileArea(tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
02456           _dock_w_chk[direction], _dock_h_chk[direction]), &st);
02457   if (ret.Failed()) return ret;
02458 
02459   /* Distant join */
02460   if (st == NULL && distant_join) st = Station::GetIfValid(station_to_join);
02461 
02462   /* Find a deleted station close to us */
02463   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
02464 
02465   if (st != NULL) {
02466     if (st->owner != _current_company) {
02467       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
02468     }
02469 
02470     CommandCost ret = st->rect.BeforeAddRect(
02471         tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
02472         _dock_w_chk[direction], _dock_h_chk[direction], StationRect::ADD_TEST);
02473     if (ret.Failed()) return ret;
02474 
02475     if (st->dock_tile != INVALID_TILE) return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_DOCK);
02476   } else {
02477     /* allocate and initialize new station */
02478     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
02479 
02480     if (flags & DC_EXEC) {
02481       st = new Station(tile);
02482 
02483       st->town = ClosestTownFromTile(tile, UINT_MAX);
02484       st->string_id = GenerateStationName(st, tile, STATIONNAMING_DOCK);
02485 
02486       if (Company::IsValidID(_current_company)) {
02487         SetBit(st->town->have_ratings, _current_company);
02488       }
02489     }
02490   }
02491 
02492   if (flags & DC_EXEC) {
02493     st->dock_tile = tile;
02494     st->AddFacility(FACIL_DOCK, tile);
02495 
02496     st->rect.BeforeAddRect(
02497         tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
02498         _dock_w_chk[direction], _dock_h_chk[direction], StationRect::ADD_TRY);
02499 
02500     /* If the water part of the dock is on a canal, update infrastructure counts.
02501      * This is needed as we've unconditionally cleared that tile before. */
02502     if (wc == WATER_CLASS_CANAL) {
02503       Company::Get(st->owner)->infrastructure.water++;
02504     }
02505     Company::Get(st->owner)->infrastructure.station += 2;
02506     DirtyCompanyInfrastructureWindows(st->owner);
02507 
02508     MakeDock(tile, st->owner, st->index, direction, wc);
02509 
02510     st->UpdateVirtCoord();
02511     UpdateStationAcceptance(st, false);
02512     st->RecomputeIndustriesNear();
02513     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
02514     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
02515     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_SHIPS);
02516   }
02517 
02518   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_STATION_DOCK]);
02519 }
02520 
02527 static CommandCost RemoveDock(TileIndex tile, DoCommandFlag flags)
02528 {
02529   Station *st = Station::GetByTile(tile);
02530   CommandCost ret = CheckOwnership(st->owner);
02531   if (ret.Failed()) return ret;
02532 
02533   TileIndex tile1 = st->dock_tile;
02534   TileIndex tile2 = tile1 + TileOffsByDiagDir(GetDockDirection(tile1));
02535 
02536   ret = EnsureNoVehicleOnGround(tile1);
02537   if (ret.Succeeded()) ret = EnsureNoVehicleOnGround(tile2);
02538   if (ret.Failed()) return ret;
02539 
02540   if (flags & DC_EXEC) {
02541     DoClearSquare(tile1);
02542     MarkTileDirtyByTile(tile1);
02543     MakeWaterKeepingClass(tile2, st->owner);
02544 
02545     st->rect.AfterRemoveTile(st, tile1);
02546     st->rect.AfterRemoveTile(st, tile2);
02547 
02548     st->dock_tile = INVALID_TILE;
02549     st->facilities &= ~FACIL_DOCK;
02550 
02551     Company::Get(st->owner)->infrastructure.station -= 2;
02552     DirtyCompanyInfrastructureWindows(st->owner);
02553 
02554     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_SHIPS);
02555     st->UpdateVirtCoord();
02556     st->RecomputeIndustriesNear();
02557     DeleteStationIfEmpty(st);
02558   }
02559 
02560   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_STATION_DOCK]);
02561 }
02562 
02563 #include "table/station_land.h"
02564 
02565 const DrawTileSprites *GetStationTileLayout(StationType st, byte gfx)
02566 {
02567   return &_station_display_datas[st][gfx];
02568 }
02569 
02570 static void DrawTile_Station(TileInfo *ti)
02571 {
02572   const NewGRFSpriteLayout *layout = NULL;
02573   DrawTileSprites tmp_rail_layout;
02574   const DrawTileSprites *t = NULL;
02575   RoadTypes roadtypes;
02576   int32 total_offset;
02577   const RailtypeInfo *rti = NULL;
02578   uint32 relocation = 0;
02579   uint32 ground_relocation = 0;
02580   BaseStation *st = NULL;
02581   const StationSpec *statspec = NULL;
02582   uint tile_layout = 0;
02583 
02584   if (HasStationRail(ti->tile)) {
02585     rti = GetRailTypeInfo(GetRailType(ti->tile));
02586     roadtypes = ROADTYPES_NONE;
02587     total_offset = rti->GetRailtypeSpriteOffset();
02588 
02589     if (IsCustomStationSpecIndex(ti->tile)) {
02590       /* look for customization */
02591       st = BaseStation::GetByTile(ti->tile);
02592       statspec = st->speclist[GetCustomStationSpecIndex(ti->tile)].spec;
02593 
02594       if (statspec != NULL) {
02595         tile_layout = GetStationGfx(ti->tile);
02596 
02597         if (HasBit(statspec->callback_mask, CBM_STATION_SPRITE_LAYOUT)) {
02598           uint16 callback = GetStationCallback(CBID_STATION_SPRITE_LAYOUT, 0, 0, statspec, st, ti->tile);
02599           if (callback != CALLBACK_FAILED) tile_layout = (callback & ~1) + GetRailStationAxis(ti->tile);
02600         }
02601 
02602         /* Ensure the chosen tile layout is valid for this custom station */
02603         if (statspec->renderdata != NULL) {
02604           layout = &statspec->renderdata[tile_layout < statspec->tiles ? tile_layout : (uint)GetRailStationAxis(ti->tile)];
02605           if (!layout->NeedsPreprocessing()) {
02606             t = layout;
02607             layout = NULL;
02608           }
02609         }
02610       }
02611     }
02612   } else {
02613     roadtypes = IsRoadStop(ti->tile) ? GetRoadTypes(ti->tile) : ROADTYPES_NONE;
02614     total_offset = 0;
02615   }
02616 
02617   if (IsAirport(ti->tile)) {
02618     StationGfx gfx = GetAirportGfx(ti->tile);
02619     if (gfx >= NEW_AIRPORTTILE_OFFSET) {
02620       const AirportTileSpec *ats = AirportTileSpec::Get(gfx);
02621       if (ats->grf_prop.spritegroup[0] != NULL && DrawNewAirportTile(ti, Station::GetByTile(ti->tile), gfx, ats)) {
02622         return;
02623       }
02624       /* No sprite group (or no valid one) found, meaning no graphics associated.
02625        * Use the substitute one instead */
02626       assert(ats->grf_prop.subst_id != INVALID_AIRPORTTILE);
02627       gfx = ats->grf_prop.subst_id;
02628     }
02629     switch (gfx) {
02630       case APT_RADAR_GRASS_FENCE_SW:
02631         t = &_station_display_datas_airport_radar_grass_fence_sw[GetAnimationFrame(ti->tile)];
02632         break;
02633       case APT_GRASS_FENCE_NE_FLAG:
02634         t = &_station_display_datas_airport_flag_grass_fence_ne[GetAnimationFrame(ti->tile)];
02635         break;
02636       case APT_RADAR_FENCE_SW:
02637         t = &_station_display_datas_airport_radar_fence_sw[GetAnimationFrame(ti->tile)];
02638         break;
02639       case APT_RADAR_FENCE_NE:
02640         t = &_station_display_datas_airport_radar_fence_ne[GetAnimationFrame(ti->tile)];
02641         break;
02642       case APT_GRASS_FENCE_NE_FLAG_2:
02643         t = &_station_display_datas_airport_flag_grass_fence_ne_2[GetAnimationFrame(ti->tile)];
02644         break;
02645     }
02646   }
02647 
02648   Owner owner = GetTileOwner(ti->tile);
02649 
02650   PaletteID palette;
02651   if (Company::IsValidID(owner)) {
02652     palette = COMPANY_SPRITE_COLOUR(owner);
02653   } else {
02654     /* Some stations are not owner by a company, namely oil rigs */
02655     palette = PALETTE_TO_GREY;
02656   }
02657 
02658   if (layout == NULL && (t == NULL || t->seq == NULL)) t = GetStationTileLayout(GetStationType(ti->tile), GetStationGfx(ti->tile));
02659 
02660   /* don't show foundation for docks */
02661   if (ti->tileh != SLOPE_FLAT && !IsDock(ti->tile)) {
02662     if (statspec != NULL && HasBit(statspec->flags, SSF_CUSTOM_FOUNDATIONS)) {
02663       /* Station has custom foundations.
02664        * Check whether the foundation continues beyond the tile's upper sides. */
02665       uint edge_info = 0;
02666       int z;
02667       Slope slope = GetFoundationPixelSlope(ti->tile, &z);
02668       if (!HasFoundationNW(ti->tile, slope, z)) SetBit(edge_info, 0);
02669       if (!HasFoundationNE(ti->tile, slope, z)) SetBit(edge_info, 1);
02670       SpriteID image = GetCustomStationFoundationRelocation(statspec, st, ti->tile, tile_layout, edge_info);
02671 
02672       if (HasBit(statspec->flags, SSF_EXTENDED_FOUNDATIONS)) {
02673         /* Station provides extended foundations. */
02674 
02675         static const uint8 foundation_parts[] = {
02676           0, 0, 0, 0, // Invalid,  Invalid,   Invalid,   SLOPE_SW
02677           0, 1, 2, 3, // Invalid,  SLOPE_EW,  SLOPE_SE,  SLOPE_WSE
02678           0, 4, 5, 6, // Invalid,  SLOPE_NW,  SLOPE_NS,  SLOPE_NWS
02679           7, 8, 9     // SLOPE_NE, SLOPE_ENW, SLOPE_SEN
02680         };
02681 
02682         AddSortableSpriteToDraw(image + foundation_parts[ti->tileh], PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
02683       } else {
02684         /* Draw simple foundations, built up from 8 possible foundation sprites. */
02685 
02686         /* Each set bit represents one of the eight composite sprites to be drawn.
02687          * 'Invalid' entries will not drawn but are included for completeness. */
02688         static const uint8 composite_foundation_parts[] = {
02689           /* Invalid  (00000000), Invalid   (11010001), Invalid   (11100100), SLOPE_SW  (11100000) */
02690              0x00,                0xD1,                 0xE4,                 0xE0,
02691           /* Invalid  (11001010), SLOPE_EW  (11001001), SLOPE_SE  (11000100), SLOPE_WSE (11000000) */
02692              0xCA,                0xC9,                 0xC4,                 0xC0,
02693           /* Invalid  (11010010), SLOPE_NW  (10010001), SLOPE_NS  (11100100), SLOPE_NWS (10100000) */
02694              0xD2,                0x91,                 0xE4,                 0xA0,
02695           /* SLOPE_NE (01001010), SLOPE_ENW (00001001), SLOPE_SEN (01000100) */
02696              0x4A,                0x09,                 0x44
02697         };
02698 
02699         uint8 parts = composite_foundation_parts[ti->tileh];
02700 
02701         /* If foundations continue beyond the tile's upper sides then
02702          * mask out the last two pieces. */
02703         if (HasBit(edge_info, 0)) ClrBit(parts, 6);
02704         if (HasBit(edge_info, 1)) ClrBit(parts, 7);
02705 
02706         if (parts == 0) {
02707           /* We always have to draw at least one sprite to make sure there is a boundingbox and a sprite with the
02708            * correct offset for the childsprites.
02709            * So, draw the (completely empty) sprite of the default foundations. */
02710           goto draw_default_foundation;
02711         }
02712 
02713         StartSpriteCombine();
02714         for (int i = 0; i < 8; i++) {
02715           if (HasBit(parts, i)) {
02716             AddSortableSpriteToDraw(image + i, PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
02717           }
02718         }
02719         EndSpriteCombine();
02720       }
02721 
02722       OffsetGroundSprite(31, 1);
02723       ti->z += ApplyPixelFoundationToSlope(FOUNDATION_LEVELED, &ti->tileh);
02724     } else {
02725 draw_default_foundation:
02726       DrawFoundation(ti, FOUNDATION_LEVELED);
02727     }
02728   }
02729 
02730   if (IsBuoy(ti->tile)) {
02731     DrawWaterClassGround(ti);
02732     SpriteID sprite = GetCanalSprite(CF_BUOY, ti->tile);
02733     if (sprite != 0) total_offset = sprite - SPR_IMG_BUOY;
02734   } else if (IsDock(ti->tile) || (IsOilRig(ti->tile) && IsTileOnWater(ti->tile))) {
02735     if (ti->tileh == SLOPE_FLAT) {
02736       DrawWaterClassGround(ti);
02737     } else {
02738       assert(IsDock(ti->tile));
02739       TileIndex water_tile = ti->tile + TileOffsByDiagDir(GetDockDirection(ti->tile));
02740       WaterClass wc = GetWaterClass(water_tile);
02741       if (wc == WATER_CLASS_SEA) {
02742         DrawShoreTile(ti->tileh);
02743       } else {
02744         DrawClearLandTile(ti, 3);
02745       }
02746     }
02747   } else {
02748     if (layout != NULL) {
02749       /* Sprite layout which needs preprocessing */
02750       bool separate_ground = HasBit(statspec->flags, SSF_SEPARATE_GROUND);
02751       uint32 var10_values = layout->PrepareLayout(total_offset, rti->fallback_railtype, 0, 0, separate_ground);
02752       uint8 var10;
02753       FOR_EACH_SET_BIT(var10, var10_values) {
02754         uint32 var10_relocation = GetCustomStationRelocation(statspec, st, ti->tile, var10);
02755         layout->ProcessRegisters(var10, var10_relocation, separate_ground);
02756       }
02757       tmp_rail_layout.seq = layout->GetLayout(&tmp_rail_layout.ground);
02758       t = &tmp_rail_layout;
02759       total_offset = 0;
02760     } else if (statspec != NULL) {
02761       /* Simple sprite layout */
02762       ground_relocation = relocation = GetCustomStationRelocation(statspec, st, ti->tile, 0);
02763       if (HasBit(statspec->flags, SSF_SEPARATE_GROUND)) {
02764         ground_relocation = GetCustomStationRelocation(statspec, st, ti->tile, 1);
02765       }
02766       ground_relocation += rti->fallback_railtype;
02767     }
02768 
02769     SpriteID image = t->ground.sprite;
02770     PaletteID pal  = t->ground.pal;
02771     if (rti != NULL && rti->UsesOverlay() && (image == SPR_RAIL_TRACK_X || image == SPR_RAIL_TRACK_Y)) {
02772       SpriteID ground = GetCustomRailSprite(rti, ti->tile, RTSG_GROUND);
02773       DrawGroundSprite(SPR_FLAT_GRASS_TILE, PAL_NONE);
02774       DrawGroundSprite(ground + (image == SPR_RAIL_TRACK_X ? RTO_X : RTO_Y), PAL_NONE);
02775 
02776       if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasStationReservation(ti->tile)) {
02777         SpriteID overlay = GetCustomRailSprite(rti, ti->tile, RTSG_OVERLAY);
02778         DrawGroundSprite(overlay + (image == SPR_RAIL_TRACK_X ? RTO_X : RTO_Y), PALETTE_CRASH);
02779       }
02780     } else {
02781       image += HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE) ? ground_relocation : total_offset;
02782       if (HasBit(pal, SPRITE_MODIFIER_CUSTOM_SPRITE)) pal += ground_relocation;
02783       DrawGroundSprite(image, GroundSpritePaletteTransform(image, pal, palette));
02784 
02785       /* PBS debugging, draw reserved tracks darker */
02786       if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasStationRail(ti->tile) && HasStationReservation(ti->tile)) {
02787         const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
02788         DrawGroundSprite(GetRailStationAxis(ti->tile) == AXIS_X ? rti->base_sprites.single_x : rti->base_sprites.single_y, PALETTE_CRASH);
02789       }
02790     }
02791   }
02792 
02793   if (HasStationRail(ti->tile) && HasCatenaryDrawn(GetRailType(ti->tile)) && IsStationTileElectrifiable(ti->tile)) DrawCatenary(ti);
02794 
02795   if (HasBit(roadtypes, ROADTYPE_TRAM)) {
02796     Axis axis = GetRoadStopDir(ti->tile) == DIAGDIR_NE ? AXIS_X : AXIS_Y;
02797     DrawGroundSprite((HasBit(roadtypes, ROADTYPE_ROAD) ? SPR_TRAMWAY_OVERLAY : SPR_TRAMWAY_TRAM) + (axis ^ 1), PAL_NONE);
02798     DrawTramCatenary(ti, axis == AXIS_X ? ROAD_X : ROAD_Y);
02799   }
02800 
02801   if (IsRailWaypoint(ti->tile)) {
02802     /* Don't offset the waypoint graphics; they're always the same. */
02803     total_offset = 0;
02804   }
02805 
02806   DrawRailTileSeq(ti, t, TO_BUILDINGS, total_offset, relocation, palette);
02807 }
02808 
02809 void StationPickerDrawSprite(int x, int y, StationType st, RailType railtype, RoadType roadtype, int image)
02810 {
02811   int32 total_offset = 0;
02812   PaletteID pal = COMPANY_SPRITE_COLOUR(_local_company);
02813   const DrawTileSprites *t = GetStationTileLayout(st, image);
02814   const RailtypeInfo *rti = NULL;
02815 
02816   if (railtype != INVALID_RAILTYPE) {
02817     rti = GetRailTypeInfo(railtype);
02818     total_offset = rti->GetRailtypeSpriteOffset();
02819   }
02820 
02821   SpriteID img = t->ground.sprite;
02822   if ((img == SPR_RAIL_TRACK_X || img == SPR_RAIL_TRACK_Y) && rti->UsesOverlay()) {
02823     SpriteID ground = GetCustomRailSprite(rti, INVALID_TILE, RTSG_GROUND);
02824     DrawSprite(SPR_FLAT_GRASS_TILE, PAL_NONE, x, y);
02825     DrawSprite(ground + (img == SPR_RAIL_TRACK_X ? RTO_X : RTO_Y), PAL_NONE, x, y);
02826   } else {
02827     DrawSprite(img + total_offset, HasBit(img, PALETTE_MODIFIER_COLOUR) ? pal : PAL_NONE, x, y);
02828   }
02829 
02830   if (roadtype == ROADTYPE_TRAM) {
02831     DrawSprite(SPR_TRAMWAY_TRAM + (t->ground.sprite == SPR_ROAD_PAVED_STRAIGHT_X ? 1 : 0), PAL_NONE, x, y);
02832   }
02833 
02834   /* Default waypoint has no railtype specific sprites */
02835   DrawRailTileSeqInGUI(x, y, t, st == STATION_WAYPOINT ? 0 : total_offset, 0, pal);
02836 }
02837 
02838 static int GetSlopePixelZ_Station(TileIndex tile, uint x, uint y)
02839 {
02840   return GetTileMaxPixelZ(tile);
02841 }
02842 
02843 static Foundation GetFoundation_Station(TileIndex tile, Slope tileh)
02844 {
02845   return FlatteningFoundation(tileh);
02846 }
02847 
02848 static void GetTileDesc_Station(TileIndex tile, TileDesc *td)
02849 {
02850   td->owner[0] = GetTileOwner(tile);
02851   if (IsDriveThroughStopTile(tile)) {
02852     Owner road_owner = INVALID_OWNER;
02853     Owner tram_owner = INVALID_OWNER;
02854     RoadTypes rts = GetRoadTypes(tile);
02855     if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
02856     if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
02857 
02858     /* Is there a mix of owners? */
02859     if ((tram_owner != INVALID_OWNER && tram_owner != td->owner[0]) ||
02860         (road_owner != INVALID_OWNER && road_owner != td->owner[0])) {
02861       uint i = 1;
02862       if (road_owner != INVALID_OWNER) {
02863         td->owner_type[i] = STR_LAND_AREA_INFORMATION_ROAD_OWNER;
02864         td->owner[i] = road_owner;
02865         i++;
02866       }
02867       if (tram_owner != INVALID_OWNER) {
02868         td->owner_type[i] = STR_LAND_AREA_INFORMATION_TRAM_OWNER;
02869         td->owner[i] = tram_owner;
02870       }
02871     }
02872   }
02873   td->build_date = BaseStation::GetByTile(tile)->build_date;
02874 
02875   if (HasStationTileRail(tile)) {
02876     const StationSpec *spec = GetStationSpec(tile);
02877 
02878     if (spec != NULL) {
02879       td->station_class = StationClass::GetName(spec->cls_id);
02880       td->station_name  = spec->name;
02881 
02882       if (spec->grf_prop.grffile != NULL) {
02883         const GRFConfig *gc = GetGRFConfig(spec->grf_prop.grffile->grfid);
02884         td->grf = gc->GetName();
02885       }
02886     }
02887 
02888     const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(tile));
02889     td->rail_speed = rti->max_speed;
02890   }
02891 
02892   if (IsAirport(tile)) {
02893     const AirportSpec *as = Station::GetByTile(tile)->airport.GetSpec();
02894     td->airport_class = AirportClass::GetName(as->cls_id);
02895     td->airport_name = as->name;
02896 
02897     const AirportTileSpec *ats = AirportTileSpec::GetByTile(tile);
02898     td->airport_tile_name = ats->name;
02899 
02900     if (as->grf_prop.grffile != NULL) {
02901       const GRFConfig *gc = GetGRFConfig(as->grf_prop.grffile->grfid);
02902       td->grf = gc->GetName();
02903     } else if (ats->grf_prop.grffile != NULL) {
02904       const GRFConfig *gc = GetGRFConfig(ats->grf_prop.grffile->grfid);
02905       td->grf = gc->GetName();
02906     }
02907   }
02908 
02909   StringID str;
02910   switch (GetStationType(tile)) {
02911     default: NOT_REACHED();
02912     case STATION_RAIL:     str = STR_LAI_STATION_DESCRIPTION_RAILROAD_STATION; break;
02913     case STATION_AIRPORT:
02914       str = (IsHangar(tile) ? STR_LAI_STATION_DESCRIPTION_AIRCRAFT_HANGAR : STR_LAI_STATION_DESCRIPTION_AIRPORT);
02915       break;
02916     case STATION_TRUCK:    str = STR_LAI_STATION_DESCRIPTION_TRUCK_LOADING_AREA; break;
02917     case STATION_BUS:      str = STR_LAI_STATION_DESCRIPTION_BUS_STATION; break;
02918     case STATION_OILRIG:   str = STR_INDUSTRY_NAME_OIL_RIG; break;
02919     case STATION_DOCK:     str = STR_LAI_STATION_DESCRIPTION_SHIP_DOCK; break;
02920     case STATION_BUOY:     str = STR_LAI_STATION_DESCRIPTION_BUOY; break;
02921     case STATION_WAYPOINT: str = STR_LAI_STATION_DESCRIPTION_WAYPOINT; break;
02922   }
02923   td->str = str;
02924 }
02925 
02926 
02927 static TrackStatus GetTileTrackStatus_Station(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
02928 {
02929   TrackBits trackbits = TRACK_BIT_NONE;
02930 
02931   switch (mode) {
02932     case TRANSPORT_RAIL:
02933       if (HasStationRail(tile) && !IsStationTileBlocked(tile)) {
02934         trackbits = TrackToTrackBits(GetRailStationTrack(tile));
02935       }
02936       break;
02937 
02938     case TRANSPORT_WATER:
02939       /* buoy is coded as a station, it is always on open water */
02940       if (IsBuoy(tile)) {
02941         trackbits = TRACK_BIT_ALL;
02942         /* remove tracks that connect NE map edge */
02943         if (TileX(tile) == 0) trackbits &= ~(TRACK_BIT_X | TRACK_BIT_UPPER | TRACK_BIT_RIGHT);
02944         /* remove tracks that connect NW map edge */
02945         if (TileY(tile) == 0) trackbits &= ~(TRACK_BIT_Y | TRACK_BIT_LEFT | TRACK_BIT_UPPER);
02946       }
02947       break;
02948 
02949     case TRANSPORT_ROAD:
02950       if ((GetRoadTypes(tile) & sub_mode) != 0 && IsRoadStop(tile)) {
02951         DiagDirection dir = GetRoadStopDir(tile);
02952         Axis axis = DiagDirToAxis(dir);
02953 
02954         if (side != INVALID_DIAGDIR) {
02955           if (axis != DiagDirToAxis(side) || (IsStandardRoadStopTile(tile) && dir != side)) break;
02956         }
02957 
02958         trackbits = AxisToTrackBits(axis);
02959       }
02960       break;
02961 
02962     default:
02963       break;
02964   }
02965 
02966   return CombineTrackStatus(TrackBitsToTrackdirBits(trackbits), TRACKDIR_BIT_NONE);
02967 }
02968 
02969 
02970 static void TileLoop_Station(TileIndex tile)
02971 {
02972   /* FIXME -- GetTileTrackStatus_Station -> animated stationtiles
02973    * hardcoded.....not good */
02974   switch (GetStationType(tile)) {
02975     case STATION_AIRPORT:
02976       AirportTileAnimationTrigger(Station::GetByTile(tile), tile, AAT_TILELOOP);
02977       break;
02978 
02979     case STATION_DOCK:
02980       if (GetTileSlope(tile) != SLOPE_FLAT) break; // only handle water part
02981       /* FALL THROUGH */
02982     case STATION_OILRIG: //(station part)
02983     case STATION_BUOY:
02984       TileLoop_Water(tile);
02985       break;
02986 
02987     default: break;
02988   }
02989 }
02990 
02991 
02992 static void AnimateTile_Station(TileIndex tile)
02993 {
02994   if (HasStationRail(tile)) {
02995     AnimateStationTile(tile);
02996     return;
02997   }
02998 
02999   if (IsAirport(tile)) {
03000     AnimateAirportTile(tile);
03001   }
03002 }
03003 
03004 
03005 static bool ClickTile_Station(TileIndex tile)
03006 {
03007   const BaseStation *bst = BaseStation::GetByTile(tile);
03008 
03009   if (bst->facilities & FACIL_WAYPOINT) {
03010     ShowWaypointWindow(Waypoint::From(bst));
03011   } else if (IsHangar(tile)) {
03012     const Station *st = Station::From(bst);
03013     ShowDepotWindow(st->airport.GetHangarTile(st->airport.GetHangarNum(tile)), VEH_AIRCRAFT);
03014   } else {
03015     ShowStationViewWindow(bst->index);
03016   }
03017   return true;
03018 }
03019 
03020 static VehicleEnterTileStatus VehicleEnter_Station(Vehicle *v, TileIndex tile, int x, int y)
03021 {
03022   if (v->type == VEH_TRAIN) {
03023     StationID station_id = GetStationIndex(tile);
03024     if (!v->current_order.ShouldStopAtStation(v, station_id)) return VETSB_CONTINUE;
03025     if (!IsRailStation(tile) || !v->IsFrontEngine()) return VETSB_CONTINUE;
03026 
03027     int station_ahead;
03028     int station_length;
03029     int stop = GetTrainStopLocation(station_id, tile, Train::From(v), &station_ahead, &station_length);
03030 
03031     /* Stop whenever that amount of station ahead + the distance from the
03032      * begin of the platform to the stop location is longer than the length
03033      * of the platform. Station ahead 'includes' the current tile where the
03034      * vehicle is on, so we need to substract that. */
03035     if (!IsInsideBS(stop + station_ahead, station_length, TILE_SIZE)) return VETSB_CONTINUE;
03036 
03037     DiagDirection dir = DirToDiagDir(v->direction);
03038 
03039     x &= 0xF;
03040     y &= 0xF;
03041 
03042     if (DiagDirToAxis(dir) != AXIS_X) Swap(x, y);
03043     if (y == TILE_SIZE / 2) {
03044       if (dir != DIAGDIR_SE && dir != DIAGDIR_SW) x = TILE_SIZE - 1 - x;
03045       stop &= TILE_SIZE - 1;
03046 
03047       if (x == stop) return VETSB_ENTERED_STATION | (VehicleEnterTileStatus)(station_id << VETS_STATION_ID_OFFSET); // enter station
03048       if (x < stop) {
03049         uint16 spd;
03050 
03051         v->vehstatus |= VS_TRAIN_SLOWING;
03052         spd = max(0, (stop - x) * 20 - 15);
03053         if (spd < v->cur_speed) v->cur_speed = spd;
03054       }
03055     }
03056   } else if (v->type == VEH_ROAD) {
03057     RoadVehicle *rv = RoadVehicle::From(v);
03058     if (rv->state < RVSB_IN_ROAD_STOP && !IsReversingRoadTrackdir((Trackdir)rv->state) && rv->frame == 0) {
03059       if (IsRoadStop(tile) && rv->IsFrontEngine()) {
03060         /* Attempt to allocate a parking bay in a road stop */
03061         return RoadStop::GetByTile(tile, GetRoadStopType(tile))->Enter(rv) ? VETSB_CONTINUE : VETSB_CANNOT_ENTER;
03062       }
03063     }
03064   }
03065 
03066   return VETSB_CONTINUE;
03067 }
03068 
03073 void TriggerWatchedCargoCallbacks(Station *st)
03074 {
03075   /* Collect cargoes accepted since the last big tick. */
03076   uint cargoes = 0;
03077   for (CargoID cid = 0; cid < NUM_CARGO; cid++) {
03078     if (HasBit(st->goods[cid].acceptance_pickup, GoodsEntry::GES_ACCEPTED_BIGTICK)) SetBit(cargoes, cid);
03079   }
03080 
03081   /* Anything to do? */
03082   if (cargoes == 0) return;
03083 
03084   /* Loop over all houses in the catchment. */
03085   Rect r = st->GetCatchmentRect();
03086   TileArea ta(TileXY(r.left, r.top), TileXY(r.right, r.bottom));
03087   TILE_AREA_LOOP(tile, ta) {
03088     if (IsTileType(tile, MP_HOUSE)) {
03089       WatchedCargoCallback(tile, cargoes);
03090     }
03091   }
03092 }
03093 
03100 static bool StationHandleBigTick(BaseStation *st)
03101 {
03102   if (!st->IsInUse()) {
03103     if (++st->delete_ctr >= 8) delete st;
03104     return false;
03105   }
03106 
03107   if (Station::IsExpected(st)) {
03108     TriggerWatchedCargoCallbacks(Station::From(st));
03109 
03110     for (CargoID i = 0; i < NUM_CARGO; i++) {
03111       ClrBit(Station::From(st)->goods[i].acceptance_pickup, GoodsEntry::GES_ACCEPTED_BIGTICK);
03112     }
03113   }
03114 
03115 
03116   if ((st->facilities & FACIL_WAYPOINT) == 0) UpdateStationAcceptance(Station::From(st), true);
03117 
03118   return true;
03119 }
03120 
03121 static inline void byte_inc_sat(byte *p)
03122 {
03123   byte b = *p + 1;
03124   if (b != 0) *p = b;
03125 }
03126 
03127 static void UpdateStationRating(Station *st)
03128 {
03129   bool waiting_changed = false;
03130 
03131   byte_inc_sat(&st->time_since_load);
03132   byte_inc_sat(&st->time_since_unload);
03133 
03134   const CargoSpec *cs;
03135   FOR_ALL_CARGOSPECS(cs) {
03136     GoodsEntry *ge = &st->goods[cs->Index()];
03137     /* Slowly increase the rating back to his original level in the case we
03138      *  didn't deliver cargo yet to this station. This happens when a bribe
03139      *  failed while you didn't moved that cargo yet to a station. */
03140     if (!HasBit(ge->acceptance_pickup, GoodsEntry::GES_PICKUP) && ge->rating < INITIAL_STATION_RATING) {
03141       ge->rating++;
03142     }
03143 
03144     /* Only change the rating if we are moving this cargo */
03145     if (HasBit(ge->acceptance_pickup, GoodsEntry::GES_PICKUP)) {
03146       byte_inc_sat(&ge->days_since_pickup);
03147 
03148       bool skip = false;
03149       int rating = 0;
03150       uint waiting = ge->cargo.Count();
03151 
03152       /* num_dests is at least 1 if there is any cargo as
03153        * INVALID_STATION is also a destination.
03154        */
03155       uint num_dests = (uint)ge->cargo.Packets()->MapSize();
03156 
03157       /* Average amount of cargo per next hop, but prefer solitary stations
03158        * with only one or two next hops. They are allowed to have more
03159        * cargo waiting per next hop.
03160        * With manual cargo distribution waiting_avg = waiting / 2 as then
03161        * INVALID_STATION is the only destination.
03162        */
03163       uint waiting_avg = waiting / (num_dests + 1);
03164 
03165       if (HasBit(cs->callback_mask, CBM_CARGO_STATION_RATING_CALC)) {
03166         /* Perform custom station rating. If it succeeds the speed, days in transit and
03167          * waiting cargo ratings must not be executed. */
03168 
03169         /* NewGRFs expect last speed to be 0xFF when no vehicle has arrived yet. */
03170         uint last_speed = ge->last_speed;
03171         if (last_speed == 0) last_speed = 0xFF;
03172 
03173         uint32 var18 = min(ge->days_since_pickup, 0xFF) | (min(ge->max_waiting_cargo, 0xFFFF) << 8) | (min(last_speed, 0xFF) << 24);
03174         /* Convert to the 'old' vehicle types */
03175         uint32 var10 = (st->last_vehicle_type == VEH_INVALID) ? 0x0 : (st->last_vehicle_type + 0x10);
03176         uint16 callback = GetCargoCallback(CBID_CARGO_STATION_RATING_CALC, var10, var18, cs);
03177         if (callback != CALLBACK_FAILED) {
03178           skip = true;
03179           rating = GB(callback, 0, 14);
03180 
03181           /* Simulate a 15 bit signed value */
03182           if (HasBit(callback, 14)) rating -= 0x4000;
03183         }
03184       }
03185 
03186       if (!skip) {
03187         int b = ge->last_speed - 85;
03188         if (b >= 0) rating += b >> 2;
03189 
03190         byte days = ge->days_since_pickup;
03191         if (st->last_vehicle_type == VEH_SHIP) days >>= 2;
03192         (days > 21) ||
03193         (rating += 25, days > 12) ||
03194         (rating += 25, days > 6) ||
03195         (rating += 45, days > 3) ||
03196         (rating += 35, true);
03197 
03198         (rating -= 90, ge->max_waiting_cargo > 1500) ||
03199         (rating += 55, ge->max_waiting_cargo > 1000) ||
03200         (rating += 35, ge->max_waiting_cargo > 600) ||
03201         (rating += 10, ge->max_waiting_cargo > 300) ||
03202         (rating += 20, ge->max_waiting_cargo > 100) ||
03203         (rating += 10, true);
03204       }
03205 
03206       if (Company::IsValidID(st->owner) && HasBit(st->town->statues, st->owner)) rating += 26;
03207 
03208       byte age = ge->last_age;
03209       (age >= 3) ||
03210       (rating += 10, age >= 2) ||
03211       (rating += 10, age >= 1) ||
03212       (rating += 13, true);
03213 
03214       {
03215         int or_ = ge->rating; // old rating
03216 
03217         /* only modify rating in steps of -2, -1, 0, 1 or 2 */
03218         ge->rating = rating = or_ + Clamp(Clamp(rating, 0, 255) - or_, -2, 2);
03219 
03220         /* if rating is <= 64 and more than 100 items waiting on average per destination,
03221          * remove some random amount of goods from the station */
03222         if (rating <= 64 && waiting_avg >= 100) {
03223           int dec = Random() & 0x1F;
03224           if (waiting_avg < 200) dec &= 7;
03225           waiting -= (dec + 1) * num_dests;
03226           waiting_changed = true;
03227         }
03228 
03229         /* if rating is <= 127 and there are any items waiting, maybe remove some goods. */
03230         if (rating <= 127 && waiting != 0) {
03231           uint32 r = Random();
03232           if (rating <= (int)GB(r, 0, 7)) {
03233             /* Need to have int, otherwise it will just overflow etc. */
03234             waiting = max((int)waiting - (int)((GB(r, 8, 2) - 1) * num_dests), 0);
03235             waiting_changed = true;
03236           }
03237         }
03238 
03239         /* At some point we really must cap the cargo. Previously this
03240          * was a strict 4095, but now we'll have a less strict, but
03241          * increasingly agressive truncation of the amount of cargo. */
03242         static const uint WAITING_CARGO_THRESHOLD  = 1 << 12;
03243         static const uint WAITING_CARGO_CUT_FACTOR = 1 <<  6;
03244         static const uint MAX_WAITING_CARGO        = 1 << 15;
03245 
03246         if (waiting > WAITING_CARGO_THRESHOLD) {
03247           uint difference = waiting - WAITING_CARGO_THRESHOLD;
03248           waiting -= (difference / WAITING_CARGO_CUT_FACTOR);
03249 
03250           waiting = min(waiting, MAX_WAITING_CARGO);
03251           waiting_changed = true;
03252         }
03253 
03254         if (waiting_changed) {
03255           /* feed back the exact own waiting cargo at this station for the
03256            * next rating calculation.
03257            */
03258           ge->max_waiting_cargo = 0;
03259 
03260           /* If truncating also punish the source stations' ratings to
03261            * decrease the flow of incoming cargo. */
03262 
03263           StationCargoAmountMap waiting_per_source;
03264           ge->cargo.CountAndTruncate(waiting, waiting_per_source);
03265           for (StationCargoAmountMap::iterator i(waiting_per_source.begin()); i != waiting_per_source.end(); ++i) {
03266             Station *source_station = Station::GetIfValid(i->first);
03267             if (source_station == NULL) continue;
03268 
03269             GoodsEntry &source_ge = source_station->goods[cs->Index()];
03270             source_ge.max_waiting_cargo = max(source_ge.max_waiting_cargo, i->second);
03271           }
03272         } else {
03273           /* if the average number per next hop is low, be more forgiving. */
03274           ge->max_waiting_cargo = waiting_avg;
03275         }
03276       }
03277     }
03278   }
03279 
03280   StationID index = st->index;
03281   if (waiting_changed) {
03282     SetWindowDirty(WC_STATION_VIEW, index); // update whole window
03283   } else {
03284     SetWindowWidgetDirty(WC_STATION_VIEW, index, SVW_RATINGLIST); // update only ratings list
03285   }
03286 }
03287 
03294 void DeleteStaleFlows(StationID at, CargoID c_id, StationID to)
03295 {
03296   FlowStatMap &flows = Station::Get(at)->goods[c_id].flows;
03297   for (FlowStatMap::iterator f_it = flows.begin(); f_it != flows.end();) {
03298     FlowStatSet &s_flows = f_it->second;
03299     for (FlowStatSet::iterator s_it = s_flows.begin(); s_it != s_flows.end();) {
03300       if (s_it->Via() == to) {
03301         s_flows.erase(s_it++);
03302         break; // There can only be one flow stat for this remote station in each set.
03303       } else {
03304         ++s_it;
03305       }
03306     }
03307     if (s_flows.empty()) {
03308       flows.erase(f_it++);
03309     } else {
03310       ++f_it;
03311     }
03312   }
03313 }
03314 
03321 uint GetMovingAverageLength(const Station *from, const Station *to)
03322 {
03323   return LinkStat::MIN_AVERAGE_LENGTH + (DistanceManhattan(from->xy, to->xy) >> 2);
03324 }
03325 
03329 void Station::RunAverages()
03330 {
03331   FlowStatSet new_flows;
03332   for (int goods_index = 0; goods_index < NUM_CARGO; ++goods_index) {
03333     LinkStatMap &links = this->goods[goods_index].link_stats;
03334     for (LinkStatMap::iterator i = links.begin(); i != links.end();) {
03335       StationID id = i->first;
03336       Station *other = Station::GetIfValid(id);
03337       if (other == NULL) {
03338         this->goods[goods_index].cargo.RerouteStalePackets(id);
03339         links.erase(i++);
03340       } else {
03341         LinkStat &ls = i->second;
03342         ls.Decrease();
03343         if (ls.IsValid()) {
03344           ++i;
03345         } else {
03346           DeleteStaleFlows(this->index, goods_index, id);
03347           this->goods[goods_index].cargo.RerouteStalePackets(id);
03348           links.erase(i++);
03349         }
03350       }
03351     }
03352 
03353     if (_settings_game.linkgraph.GetDistributionType(goods_index) == DT_MANUAL) {
03354       this->goods[goods_index].flows.clear();
03355       continue;
03356     }
03357 
03358     FlowStatMap &flows = this->goods[goods_index].flows;
03359     for (FlowStatMap::iterator i = flows.begin(); i != flows.end();) {
03360       if (!Station::IsValidID(i->first)) {
03361         flows.erase(i++);
03362       } else {
03363         FlowStatSet &flow_set = i->second;
03364         for (FlowStatSet::iterator j = flow_set.begin(); j != flow_set.end(); ++j) {
03365           if (Station::IsValidID(j->Via())) {
03366             new_flows.insert(j->GetDecreasedCopy());
03367           }
03368         }
03369         flow_set.swap(new_flows);
03370         new_flows.clear();
03371         ++i;
03372       }
03373     }
03374   }
03375 }
03376 
03385 void IncreaseStats(Station *st, CargoID cargo, StationID next_station_id, uint capacity, uint usage)
03386 {
03387   LinkStatMap &stats = st->goods[cargo].link_stats;
03388   LinkStatMap::iterator i = stats.find(next_station_id);
03389   if (i == stats.end()) {
03390     assert(st->index != next_station_id);
03391     stats.insert(std::make_pair(next_station_id, LinkStat(
03392         GetMovingAverageLength(st, 
03393         Station::Get(next_station_id)), capacity,
03394         usage == UINT_MAX ? 0 : usage)));
03395   } else {
03396     LinkStat &link_stat = i->second;
03397     if (usage == UINT_MAX) {
03398       link_stat.Refresh(capacity);
03399     } else {
03400       assert(capacity >= usage);
03401       link_stat.Increase(capacity, usage);
03402     }
03403     assert(link_stat.IsValid());
03404   }
03405 }
03406 
03413 void IncreaseStats(Station *st, const Vehicle *front, StationID next_station_id)
03414 {
03415   for (const Vehicle *v = front; v != NULL; v = v->Next()) {
03416     if (v->refit_cap > 0) {
03417       IncreaseStats(st, v->cargo_type, next_station_id, v->refit_cap, v->cargo.Count());
03418     }
03419   }
03420 }
03421 
03422 /* called for every station each tick */
03423 static void StationHandleSmallTick(BaseStation *st)
03424 {
03425   if ((st->facilities & FACIL_WAYPOINT) != 0 || !st->IsInUse()) return;
03426 
03427   byte b = st->delete_ctr + 1;
03428   if (b >= STATION_RATING_TICKS) b = 0;
03429   st->delete_ctr = b;
03430 
03431   if (b == 0) UpdateStationRating(Station::From(st));
03432 }
03433 
03434 void OnTick_Station()
03435 {
03436   if (_game_mode == GM_EDITOR) return;
03437 
03438   RunAverages<Station>();
03439 
03440   BaseStation *st;
03441   FOR_ALL_BASE_STATIONS(st) {
03442     StationHandleSmallTick(st);
03443 
03444     /* Run STATION_ACCEPTANCE_TICKS = 250 tick interval trigger for station animation.
03445      * Station index is included so that triggers are not all done
03446      * at the same time. */
03447     if ((_tick_counter + st->index) % STATION_ACCEPTANCE_TICKS == 0) {
03448       /* Stop processing this station if it was deleted */
03449       if (!StationHandleBigTick(st)) continue;
03450       TriggerStationAnimation(st, st->xy, SAT_250_TICKS);
03451       if (Station::IsExpected(st)) AirportAnimationTrigger(Station::From(st), AAT_STATION_250_TICKS);
03452     }
03453   }
03454 }
03455 
03457 void StationMonthlyLoop()
03458 {
03459   Station *st;
03460 
03461   FOR_ALL_STATIONS(st) {
03462     for (CargoID i = 0; i < NUM_CARGO; i++) {
03463       GoodsEntry *ge = &st->goods[i];
03464       SB(ge->acceptance_pickup, GoodsEntry::GES_LAST_MONTH, 1, GB(ge->acceptance_pickup, GoodsEntry::GES_CURRENT_MONTH, 1));
03465       ClrBit(ge->acceptance_pickup, GoodsEntry::GES_CURRENT_MONTH);
03466       ge->supply = ge->supply_new;
03467       ge->supply_new = 0;
03468     }
03469   }
03470 }
03471 
03472 
03473 void ModifyStationRatingAround(TileIndex tile, Owner owner, int amount, uint radius)
03474 {
03475   Station *st;
03476 
03477   FOR_ALL_STATIONS(st) {
03478     if (st->owner == owner &&
03479         DistanceManhattan(tile, st->xy) <= radius) {
03480       for (CargoID i = 0; i < NUM_CARGO; i++) {
03481         GoodsEntry *ge = &st->goods[i];
03482 
03483         if (ge->acceptance_pickup != 0) {
03484           ge->rating = Clamp(ge->rating + amount, 0, 255);
03485         }
03486       }
03487     }
03488   }
03489 }
03490 
03491 static uint UpdateStationWaiting(Station *st, CargoID type, uint amount, SourceType source_type, SourceID source_id)
03492 {
03493   /* We can't allocate a CargoPacket? Then don't do anything
03494    * at all; i.e. just discard the incoming cargo. */
03495   if (!CargoPacket::CanAllocateItem()) return 0;
03496 
03497   GoodsEntry &ge = st->goods[type];
03498   amount += ge.amount_fract;
03499   ge.amount_fract = GB(amount, 0, 8);
03500 
03501   amount >>= 8;
03502   /* No new "real" cargo item yet. */
03503   if (amount == 0) return 0;
03504 
03505   StationID id = st->index;
03506   StationID next = INVALID_STATION;
03507   FlowStatSet &flow_stats = ge.flows[id];
03508   FlowStatSet::iterator i = flow_stats.begin();
03509   if (i != flow_stats.end()) {
03510     next = i->Via();
03511     ge.UpdateFlowStats(flow_stats, i, amount);
03512   }
03513 
03514   ge.cargo.Append(next, new CargoPacket(st->index, st->xy, amount, source_type, source_id));
03515   ge.supply_new += amount;
03516 
03517   if (!HasBit(ge.acceptance_pickup, GoodsEntry::GES_PICKUP)) {
03518     InvalidateWindowData(WC_STATION_LIST, st->index);
03519     SetBit(ge.acceptance_pickup, GoodsEntry::GES_PICKUP);
03520   }
03521 
03522   TriggerStationAnimation(st, st->xy, SAT_NEW_CARGO, type);
03523   AirportAnimationTrigger(st, AAT_STATION_NEW_CARGO, type);
03524 
03525   SetWindowDirty(WC_STATION_VIEW, st->index);
03526   st->MarkTilesDirty(true);
03527   return amount;
03528 }
03529 
03530 static bool IsUniqueStationName(const char *name)
03531 {
03532   const Station *st;
03533 
03534   FOR_ALL_STATIONS(st) {
03535     if (st->name != NULL && strcmp(st->name, name) == 0) return false;
03536   }
03537 
03538   return true;
03539 }
03540 
03550 CommandCost CmdRenameStation(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
03551 {
03552   Station *st = Station::GetIfValid(p1);
03553   if (st == NULL) return CMD_ERROR;
03554 
03555   CommandCost ret = CheckOwnership(st->owner);
03556   if (ret.Failed()) return ret;
03557 
03558   bool reset = StrEmpty(text);
03559 
03560   if (!reset) {
03561     if (Utf8StringLength(text) >= MAX_LENGTH_STATION_NAME_CHARS) return CMD_ERROR;
03562     if (!IsUniqueStationName(text)) return_cmd_error(STR_ERROR_NAME_MUST_BE_UNIQUE);
03563   }
03564 
03565   if (flags & DC_EXEC) {
03566     free(st->name);
03567     st->name = reset ? NULL : strdup(text);
03568 
03569     st->UpdateVirtCoord();
03570     InvalidateWindowData(WC_STATION_LIST, st->owner, 1);
03571   }
03572 
03573   return CommandCost();
03574 }
03575 
03582 void FindStationsAroundTiles(const TileArea &location, StationList *stations)
03583 {
03584   /* area to search = producer plus station catchment radius */
03585   int max_rad = (_settings_game.station.modified_catchment ? MAX_CATCHMENT : CA_UNMODIFIED);
03586 
03587   for (int dy = -max_rad; dy < location.h + max_rad; dy++) {
03588     for (int dx = -max_rad; dx < location.w + max_rad; dx++) {
03589       TileIndex cur_tile = TileAddWrap(location.tile, dx, dy);
03590       if (cur_tile == INVALID_TILE || !IsTileType(cur_tile, MP_STATION)) continue;
03591 
03592       Station *st = Station::GetByTile(cur_tile);
03593       if (st == NULL) continue;
03594 
03595       if (_settings_game.station.modified_catchment) {
03596         int rad = st->GetCatchmentRadius();
03597         if (dx < -rad || dx >= rad + location.w || dy < -rad || dy >= rad + location.h) continue;
03598       }
03599 
03600       /* Insert the station in the set. This will fail if it has
03601        * already been added.
03602        */
03603       stations->Include(st);
03604     }
03605   }
03606 }
03607 
03612 const StationList *StationFinder::GetStations()
03613 {
03614   if (this->tile != INVALID_TILE) {
03615     FindStationsAroundTiles(*this, &this->stations);
03616     this->tile = INVALID_TILE;
03617   }
03618   return &this->stations;
03619 }
03620 
03621 uint MoveGoodsToStation(CargoID type, uint amount, SourceType source_type, SourceID source_id, const StationList *all_stations)
03622 {
03623   /* Return if nothing to do. Also the rounding below fails for 0. */
03624   if (amount == 0) return 0;
03625 
03626   Station *st1 = NULL;   // Station with best rating
03627   Station *st2 = NULL;   // Second best station
03628   uint best_rating1 = 0; // rating of st1
03629   uint best_rating2 = 0; // rating of st2
03630 
03631   for (Station * const *st_iter = all_stations->Begin(); st_iter != all_stations->End(); ++st_iter) {
03632     Station *st = *st_iter;
03633 
03634     /* Is the station reserved exclusively for somebody else? */
03635     if (st->town->exclusive_counter > 0 && st->town->exclusivity != st->owner) continue;
03636 
03637     if (st->goods[type].rating == 0) continue; // Lowest possible rating, better not to give cargo anymore
03638 
03639     if (_settings_game.order.selectgoods && st->goods[type].last_speed == 0) continue; // Selectively servicing stations, and not this one
03640 
03641     if (IsCargoInClass(type, CC_PASSENGERS)) {
03642       if (st->facilities == FACIL_TRUCK_STOP) continue; // passengers are never served by just a truck stop
03643     } else {
03644       if (st->facilities == FACIL_BUS_STOP) continue; // non-passengers are never served by just a bus stop
03645     }
03646 
03647     /* This station can be used, add it to st1/st2 */
03648     if (st1 == NULL || st->goods[type].rating >= best_rating1) {
03649       st2 = st1; best_rating2 = best_rating1; st1 = st; best_rating1 = st->goods[type].rating;
03650     } else if (st2 == NULL || st->goods[type].rating >= best_rating2) {
03651       st2 = st; best_rating2 = st->goods[type].rating;
03652     }
03653   }
03654 
03655   /* no stations around at all? */
03656   if (st1 == NULL) return 0;
03657 
03658   /* From now we'll calculate with fractal cargo amounts.
03659    * First determine how much cargo we really have. */
03660   amount *= best_rating1 + 1;
03661 
03662   if (st2 == NULL) {
03663     /* only one station around */
03664     return UpdateStationWaiting(st1, type, amount, source_type, source_id);
03665   }
03666 
03667   /* several stations around, the best two (highest rating) are in st1 and st2 */
03668   assert(st1 != NULL);
03669   assert(st2 != NULL);
03670   assert(best_rating1 != 0 || best_rating2 != 0);
03671 
03672   /* Then determine the amount the worst station gets. We do it this way as the
03673    * best should get a bonus, which in this case is the rounding difference from
03674    * this calculation. In reality that will mean the bonus will be pretty low.
03675    * Nevertheless, the best station should always get the most cargo regardless
03676    * of rounding issues. */
03677   uint worst_cargo = amount * best_rating2 / (best_rating1 + best_rating2);
03678   assert(worst_cargo <= (amount - worst_cargo));
03679 
03680   /* And then send the cargo to the stations! */
03681   uint moved = UpdateStationWaiting(st1, type, amount - worst_cargo, source_type, source_id);
03682   /* These two UpdateStationWaiting's can't be in the statement as then the order
03683    * of execution would be undefined and that could cause desyncs with callbacks. */
03684   return moved + UpdateStationWaiting(st2, type, worst_cargo, source_type, source_id);
03685 }
03686 
03687 void BuildOilRig(TileIndex tile)
03688 {
03689   if (!Station::CanAllocateItem()) {
03690     DEBUG(misc, 0, "Can't allocate station for oilrig at 0x%X, reverting to oilrig only", tile);
03691     return;
03692   }
03693 
03694   Station *st = new Station(tile);
03695   st->town = ClosestTownFromTile(tile, UINT_MAX);
03696 
03697   st->string_id = GenerateStationName(st, tile, STATIONNAMING_OILRIG);
03698 
03699   assert(IsTileType(tile, MP_INDUSTRY));
03700   DeleteAnimatedTile(tile);
03701   MakeOilrig(tile, st->index, GetWaterClass(tile));
03702 
03703   st->owner = OWNER_NONE;
03704   st->airport.type = AT_OILRIG;
03705   st->airport.Add(tile);
03706   st->dock_tile = tile;
03707   st->facilities = FACIL_AIRPORT | FACIL_DOCK;
03708   st->build_date = _date;
03709 
03710   st->rect.BeforeAddTile(tile, StationRect::ADD_FORCE);
03711 
03712   for (CargoID j = 0; j < NUM_CARGO; j++) {
03713     st->goods[j].acceptance_pickup = 0;
03714     st->goods[j].days_since_pickup = 255;
03715     st->goods[j].rating = INITIAL_STATION_RATING;
03716     st->goods[j].last_speed = 0;
03717     st->goods[j].last_age = 255;
03718   }
03719 
03720   st->UpdateVirtCoord();
03721   UpdateStationAcceptance(st, false);
03722   st->RecomputeIndustriesNear();
03723 }
03724 
03725 void DeleteOilRig(TileIndex tile)
03726 {
03727   Station *st = Station::GetByTile(tile);
03728 
03729   MakeWaterKeepingClass(tile, OWNER_NONE);
03730 
03731   st->dock_tile = INVALID_TILE;
03732   st->airport.Clear();
03733   st->facilities &= ~(FACIL_AIRPORT | FACIL_DOCK);
03734   st->airport.flags = 0;
03735 
03736   st->rect.AfterRemoveTile(st, tile);
03737 
03738   st->UpdateVirtCoord();
03739   st->RecomputeIndustriesNear();
03740   if (!st->IsInUse()) delete st;
03741 }
03742 
03743 static void ChangeTileOwner_Station(TileIndex tile, Owner old_owner, Owner new_owner)
03744 {
03745   if (IsDriveThroughStopTile(tile)) {
03746     for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
03747       /* Update all roadtypes, no matter if they are present */
03748       if (GetRoadOwner(tile, rt) == old_owner) {
03749         if (HasTileRoadType(tile, rt)) {
03750           /* A drive-through road-stop has always two road bits. No need to dirty windows here, we'll redraw the whole screen anyway. */
03751           Company::Get(old_owner)->infrastructure.road[rt] -= 2;
03752           if (new_owner != INVALID_OWNER) Company::Get(new_owner)->infrastructure.road[rt] += 2;
03753         }
03754         SetRoadOwner(tile, rt, new_owner == INVALID_OWNER ? OWNER_NONE : new_owner);
03755       }
03756     }
03757   }
03758 
03759   if (!IsTileOwner(tile, old_owner)) return;
03760 
03761   if (new_owner != INVALID_OWNER) {
03762     /* Update company infrastructure counts. Only do it here
03763      * if the new owner is valid as otherwise the clear
03764      * command will do it for us. No need to dirty windows
03765      * here, we'll redraw the whole screen anyway.*/
03766     Company *old_company = Company::Get(old_owner);
03767     Company *new_company = Company::Get(new_owner);
03768 
03769     if ((IsRailWaypoint(tile) || IsRailStation(tile)) && !IsStationTileBlocked(tile)) {
03770       old_company->infrastructure.rail[GetRailType(tile)]--;
03771       new_company->infrastructure.rail[GetRailType(tile)]++;
03772     }
03773     if (IsRoadStop(tile) && !IsDriveThroughStopTile(tile)) {
03774       RoadType rt;
03775       FOR_EACH_SET_ROADTYPE(rt, GetRoadTypes(tile)) {
03776         old_company->infrastructure.road[rt] -= 2;
03777         new_company->infrastructure.road[rt] += 2;
03778       }
03779     }
03780 
03781     /* for buoys, owner of tile is owner of water, st->owner == OWNER_NONE */
03782     SetTileOwner(tile, new_owner);
03783     InvalidateWindowClassesData(WC_STATION_LIST, 0);
03784   } else {
03785     if (IsDriveThroughStopTile(tile)) {
03786       /* Remove the drive-through road stop */
03787       DoCommand(tile, 1 | 1 << 8, (GetStationType(tile) == STATION_TRUCK) ? ROADSTOP_TRUCK : ROADSTOP_BUS, DC_EXEC | DC_BANKRUPT, CMD_REMOVE_ROAD_STOP);
03788       assert(IsTileType(tile, MP_ROAD));
03789       /* Change owner of tile and all roadtypes */
03790       ChangeTileOwner(tile, old_owner, new_owner);
03791     } else {
03792       DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR);
03793       /* Set tile owner of water under (now removed) buoy and dock to OWNER_NONE.
03794        * Update owner of buoy if it was not removed (was in orders).
03795        * Do not update when owned by OWNER_WATER (sea and rivers). */
03796       if ((IsTileType(tile, MP_WATER) || IsBuoyTile(tile)) && IsTileOwner(tile, old_owner)) SetTileOwner(tile, OWNER_NONE);
03797     }
03798   }
03799 }
03800 
03809 static bool CanRemoveRoadWithStop(TileIndex tile, DoCommandFlag flags)
03810 {
03811   /* Yeah... water can always remove stops, right? */
03812   if (_current_company == OWNER_WATER) return true;
03813 
03814   RoadTypes rts = GetRoadTypes(tile);
03815   if (HasBit(rts, ROADTYPE_TRAM)) {
03816     Owner tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
03817     if (tram_owner != OWNER_NONE && CheckOwnership(tram_owner).Failed()) return false;
03818   }
03819   if (HasBit(rts, ROADTYPE_ROAD)) {
03820     Owner road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
03821     if (road_owner != OWNER_TOWN) {
03822       if (road_owner != OWNER_NONE && CheckOwnership(road_owner).Failed()) return false;
03823     } else {
03824       if (CheckAllowRemoveRoad(tile, GetAnyRoadBits(tile, ROADTYPE_ROAD), OWNER_TOWN, ROADTYPE_ROAD, flags).Failed()) return false;
03825     }
03826   }
03827 
03828   return true;
03829 }
03830 
03837 CommandCost ClearTile_Station(TileIndex tile, DoCommandFlag flags)
03838 {
03839   if (flags & DC_AUTO) {
03840     switch (GetStationType(tile)) {
03841       default: break;
03842       case STATION_RAIL:     return_cmd_error(STR_ERROR_MUST_DEMOLISH_RAILROAD);
03843       case STATION_WAYPOINT: return_cmd_error(STR_ERROR_BUILDING_MUST_BE_DEMOLISHED);
03844       case STATION_AIRPORT:  return_cmd_error(STR_ERROR_MUST_DEMOLISH_AIRPORT_FIRST);
03845       case STATION_TRUCK:    return_cmd_error(HasTileRoadType(tile, ROADTYPE_TRAM) ? STR_ERROR_MUST_DEMOLISH_CARGO_TRAM_STATION_FIRST : STR_ERROR_MUST_DEMOLISH_TRUCK_STATION_FIRST);
03846       case STATION_BUS:      return_cmd_error(HasTileRoadType(tile, ROADTYPE_TRAM) ? STR_ERROR_MUST_DEMOLISH_PASSENGER_TRAM_STATION_FIRST : STR_ERROR_MUST_DEMOLISH_BUS_STATION_FIRST);
03847       case STATION_BUOY:     return_cmd_error(STR_ERROR_BUOY_IN_THE_WAY);
03848       case STATION_DOCK:     return_cmd_error(STR_ERROR_MUST_DEMOLISH_DOCK_FIRST);
03849       case STATION_OILRIG:
03850         SetDParam(1, STR_INDUSTRY_NAME_OIL_RIG);
03851         return_cmd_error(STR_ERROR_GENERIC_OBJECT_IN_THE_WAY);
03852     }
03853   }
03854 
03855   switch (GetStationType(tile)) {
03856     case STATION_RAIL:     return RemoveRailStation(tile, flags);
03857     case STATION_WAYPOINT: return RemoveRailWaypoint(tile, flags);
03858     case STATION_AIRPORT:  return RemoveAirport(tile, flags);
03859     case STATION_TRUCK:
03860       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags)) {
03861         return_cmd_error(STR_ERROR_MUST_DEMOLISH_TRUCK_STATION_FIRST);
03862       }
03863       return RemoveRoadStop(tile, flags);
03864     case STATION_BUS:
03865       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags)) {
03866         return_cmd_error(STR_ERROR_MUST_DEMOLISH_BUS_STATION_FIRST);
03867       }
03868       return RemoveRoadStop(tile, flags);
03869     case STATION_BUOY:     return RemoveBuoy(tile, flags);
03870     case STATION_DOCK:     return RemoveDock(tile, flags);
03871     default: break;
03872   }
03873 
03874   return CMD_ERROR;
03875 }
03876 
03877 static CommandCost TerraformTile_Station(TileIndex tile, DoCommandFlag flags, int z_new, Slope tileh_new)
03878 {
03879   if (_settings_game.construction.build_on_slopes && AutoslopeEnabled()) {
03880     /* TODO: If you implement newgrf callback 149 'land slope check', you have to decide what to do with it here.
03881      *       TTDP does not call it.
03882      */
03883     if (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new)) {
03884       switch (GetStationType(tile)) {
03885         case STATION_WAYPOINT:
03886         case STATION_RAIL: {
03887           DiagDirection direction = AxisToDiagDir(GetRailStationAxis(tile));
03888           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
03889           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
03890           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03891         }
03892 
03893         case STATION_AIRPORT:
03894           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03895 
03896         case STATION_TRUCK:
03897         case STATION_BUS: {
03898           DiagDirection direction = GetRoadStopDir(tile);
03899           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
03900           if (IsDriveThroughStopTile(tile)) {
03901             if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
03902           }
03903           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03904         }
03905 
03906         default: break;
03907       }
03908     }
03909   }
03910   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
03911 }
03912 
03919 void GoodsEntry::UpdateFlowStats(FlowStatSet &flow_stats, FlowStatSet::iterator flow_it, uint count)
03920 {
03921   FlowStat fs = *flow_it;
03922   fs.Increase(count);
03923   flow_stats.erase(flow_it);
03924   flow_stats.insert(fs);
03925 }
03926 
03933 void GoodsEntry::UpdateFlowStats(FlowStatSet &flow_stats, uint count, StationID next)
03934 {
03935   FlowStatSet::iterator flow_it = flow_stats.begin();
03936   while (flow_it != flow_stats.end()) {
03937     StationID via = flow_it->Via();
03938     if (via == next) { //usually the first one is the correct one
03939       this->UpdateFlowStats(flow_stats, flow_it, count);
03940       return;
03941     } else {
03942       ++flow_it;
03943     }
03944   }
03945 }
03946 
03953 void GoodsEntry::UpdateFlowStats(StationID source, uint count, StationID next)
03954 {
03955   if (source == INVALID_STATION || next == INVALID_STATION || this->flows.empty()) return;
03956   FlowStatSet &flow_stats = this->flows[source];
03957   this->UpdateFlowStats(flow_stats, count, next);
03958 }
03959 
03967 StationID GoodsEntry::UpdateFlowStatsTransfer(StationID source, uint count, StationID curr)
03968 {
03969   if (source == INVALID_STATION || this->flows.empty()) return INVALID_STATION;
03970   FlowStatSet &flow_stats = this->flows[source];
03971   FlowStatSet::iterator flow_it = flow_stats.begin();
03972   while (flow_it != flow_stats.end()) {
03973     StationID via = flow_it->Via();
03974     if (via != curr) {
03975       this->UpdateFlowStats(flow_stats, flow_it, count);
03976       return via;
03977     } else {
03978       ++flow_it;
03979     }
03980   }
03981   return INVALID_STATION;
03982 }
03983 
03989 FlowStat GoodsEntry::GetSumFlowVia(StationID via) const
03990 {
03991   FlowStat ret(1, via);
03992   for (FlowStatMap::const_iterator i = this->flows.begin(); i != this->flows.end(); ++i) {
03993     const FlowStatSet &flow_set = i->second;
03994     for (FlowStatSet::const_iterator j = flow_set.begin(); j != flow_set.end(); ++j) {
03995       const FlowStat &flow = *j;
03996       if (flow.Via() == via) {
03997         ret += flow;
03998       }
03999     }
04000   }
04001   return ret;
04002 }
04003 
04004 extern const TileTypeProcs _tile_type_station_procs = {
04005   DrawTile_Station,           // draw_tile_proc
04006   GetSlopePixelZ_Station,     // get_slope_z_proc
04007   ClearTile_Station,          // clear_tile_proc
04008   NULL,                       // add_accepted_cargo_proc
04009   GetTileDesc_Station,        // get_tile_desc_proc
04010   GetTileTrackStatus_Station, // get_tile_track_status_proc
04011   ClickTile_Station,          // click_tile_proc
04012   AnimateTile_Station,        // animate_tile_proc
04013   TileLoop_Station,           // tile_loop_proc
04014   ChangeTileOwner_Station,    // change_tile_owner_proc
04015   NULL,                       // add_produced_cargo_proc
04016   VehicleEnter_Station,       // vehicle_enter_tile_proc
04017   GetFoundation_Station,      // get_foundation_proc
04018   TerraformTile_Station,      // terraform_tile_proc
04019 };