station_cmd.cpp

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00001 /* $Id: station_cmd.cpp 25133 2013-03-31 20:32:21Z rubidium $ */
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 "ship.h"
00022 #include "roadveh.h"
00023 #include "industry.h"
00024 #include "newgrf_cargo.h"
00025 #include "newgrf_debug.h"
00026 #include "newgrf_station.h"
00027 #include "newgrf_canal.h" /* For the buoy */
00028 #include "pathfinder/yapf/yapf_cache.h"
00029 #include "road_internal.h" /* For drawing catenary/checking road removal */
00030 #include "autoslope.h"
00031 #include "water.h"
00032 #include "strings_func.h"
00033 #include "clear_func.h"
00034 #include "date_func.h"
00035 #include "vehicle_func.h"
00036 #include "string_func.h"
00037 #include "animated_tile_func.h"
00038 #include "elrail_func.h"
00039 #include "station_base.h"
00040 #include "roadstop_base.h"
00041 #include "newgrf_railtype.h"
00042 #include "waypoint_base.h"
00043 #include "waypoint_func.h"
00044 #include "pbs.h"
00045 #include "debug.h"
00046 #include "core/random_func.hpp"
00047 #include "company_base.h"
00048 #include "table/airporttile_ids.h"
00049 #include "newgrf_airporttiles.h"
00050 #include "order_backup.h"
00051 #include "newgrf_house.h"
00052 #include "company_gui.h"
00053 #include "widgets/station_widget.h"
00054 
00055 #include "table/strings.h"
00056 
00063 bool IsHangar(TileIndex t)
00064 {
00065   assert(IsTileType(t, MP_STATION));
00066 
00067   /* If the tile isn't an airport there's no chance it's a hangar. */
00068   if (!IsAirport(t)) return false;
00069 
00070   const Station *st = Station::GetByTile(t);
00071   const AirportSpec *as = st->airport.GetSpec();
00072 
00073   for (uint i = 0; i < as->nof_depots; i++) {
00074     if (st->airport.GetHangarTile(i) == t) return true;
00075   }
00076 
00077   return false;
00078 }
00079 
00087 template <class T>
00088 CommandCost GetStationAround(TileArea ta, StationID closest_station, T **st)
00089 {
00090   ta.tile -= TileDiffXY(1, 1);
00091   ta.w    += 2;
00092   ta.h    += 2;
00093 
00094   /* check around to see if there's any stations there */
00095   TILE_AREA_LOOP(tile_cur, ta) {
00096     if (IsTileType(tile_cur, MP_STATION)) {
00097       StationID t = GetStationIndex(tile_cur);
00098       if (!T::IsValidID(t)) continue;
00099 
00100       if (closest_station == INVALID_STATION) {
00101         closest_station = t;
00102       } else if (closest_station != t) {
00103         return_cmd_error(STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING);
00104       }
00105     }
00106   }
00107   *st = (closest_station == INVALID_STATION) ? NULL : T::Get(closest_station);
00108   return CommandCost();
00109 }
00110 
00116 typedef bool (*CMSAMatcher)(TileIndex tile);
00117 
00124 static int CountMapSquareAround(TileIndex tile, CMSAMatcher cmp)
00125 {
00126   int num = 0;
00127 
00128   for (int dx = -3; dx <= 3; dx++) {
00129     for (int dy = -3; dy <= 3; dy++) {
00130       TileIndex t = TileAddWrap(tile, dx, dy);
00131       if (t != INVALID_TILE && cmp(t)) num++;
00132     }
00133   }
00134 
00135   return num;
00136 }
00137 
00143 static bool CMSAMine(TileIndex tile)
00144 {
00145   /* No industry */
00146   if (!IsTileType(tile, MP_INDUSTRY)) return false;
00147 
00148   const Industry *ind = Industry::GetByTile(tile);
00149 
00150   /* No extractive industry */
00151   if ((GetIndustrySpec(ind->type)->life_type & INDUSTRYLIFE_EXTRACTIVE) == 0) return false;
00152 
00153   for (uint i = 0; i < lengthof(ind->produced_cargo); i++) {
00154     /* The industry extracts something non-liquid, i.e. no oil or plastic, so it is a mine.
00155      * Also the production of passengers and mail is ignored. */
00156     if (ind->produced_cargo[i] != CT_INVALID &&
00157         (CargoSpec::Get(ind->produced_cargo[i])->classes & (CC_LIQUID | CC_PASSENGERS | CC_MAIL)) == 0) {
00158       return true;
00159     }
00160   }
00161 
00162   return false;
00163 }
00164 
00170 static bool CMSAWater(TileIndex tile)
00171 {
00172   return IsTileType(tile, MP_WATER) && IsWater(tile);
00173 }
00174 
00180 static bool CMSATree(TileIndex tile)
00181 {
00182   return IsTileType(tile, MP_TREES);
00183 }
00184 
00185 #define M(x) ((x) - STR_SV_STNAME)
00186 
00187 enum StationNaming {
00188   STATIONNAMING_RAIL,
00189   STATIONNAMING_ROAD,
00190   STATIONNAMING_AIRPORT,
00191   STATIONNAMING_OILRIG,
00192   STATIONNAMING_DOCK,
00193   STATIONNAMING_HELIPORT,
00194 };
00195 
00197 struct StationNameInformation {
00198   uint32 free_names; 
00199   bool *indtypes;    
00200 };
00201 
00210 static bool FindNearIndustryName(TileIndex tile, void *user_data)
00211 {
00212   /* All already found industry types */
00213   StationNameInformation *sni = (StationNameInformation*)user_data;
00214   if (!IsTileType(tile, MP_INDUSTRY)) return false;
00215 
00216   /* If the station name is undefined it means that it doesn't name a station */
00217   IndustryType indtype = GetIndustryType(tile);
00218   if (GetIndustrySpec(indtype)->station_name == STR_UNDEFINED) return false;
00219 
00220   /* In all cases if an industry that provides a name is found two of
00221    * the standard names will be disabled. */
00222   sni->free_names &= ~(1 << M(STR_SV_STNAME_OILFIELD) | 1 << M(STR_SV_STNAME_MINES));
00223   return !sni->indtypes[indtype];
00224 }
00225 
00226 static StringID GenerateStationName(Station *st, TileIndex tile, StationNaming name_class)
00227 {
00228   static const uint32 _gen_station_name_bits[] = {
00229     0,                                       // STATIONNAMING_RAIL
00230     0,                                       // STATIONNAMING_ROAD
00231     1U << M(STR_SV_STNAME_AIRPORT),          // STATIONNAMING_AIRPORT
00232     1U << M(STR_SV_STNAME_OILFIELD),         // STATIONNAMING_OILRIG
00233     1U << M(STR_SV_STNAME_DOCKS),            // STATIONNAMING_DOCK
00234     1U << M(STR_SV_STNAME_HELIPORT),         // STATIONNAMING_HELIPORT
00235   };
00236 
00237   const Town *t = st->town;
00238   uint32 free_names = UINT32_MAX;
00239 
00240   bool indtypes[NUM_INDUSTRYTYPES];
00241   memset(indtypes, 0, sizeof(indtypes));
00242 
00243   const Station *s;
00244   FOR_ALL_STATIONS(s) {
00245     if (s != st && s->town == t) {
00246       if (s->indtype != IT_INVALID) {
00247         indtypes[s->indtype] = true;
00248         continue;
00249       }
00250       uint str = M(s->string_id);
00251       if (str <= 0x20) {
00252         if (str == M(STR_SV_STNAME_FOREST)) {
00253           str = M(STR_SV_STNAME_WOODS);
00254         }
00255         ClrBit(free_names, str);
00256       }
00257     }
00258   }
00259 
00260   TileIndex indtile = tile;
00261   StationNameInformation sni = { free_names, indtypes };
00262   if (CircularTileSearch(&indtile, 7, FindNearIndustryName, &sni)) {
00263     /* An industry has been found nearby */
00264     IndustryType indtype = GetIndustryType(indtile);
00265     const IndustrySpec *indsp = GetIndustrySpec(indtype);
00266     /* STR_NULL means it only disables oil rig/mines */
00267     if (indsp->station_name != STR_NULL) {
00268       st->indtype = indtype;
00269       return STR_SV_STNAME_FALLBACK;
00270     }
00271   }
00272 
00273   /* Oil rigs/mines name could be marked not free by looking for a near by industry. */
00274   free_names = sni.free_names;
00275 
00276   /* check default names */
00277   uint32 tmp = free_names & _gen_station_name_bits[name_class];
00278   if (tmp != 0) return STR_SV_STNAME + FindFirstBit(tmp);
00279 
00280   /* check mine? */
00281   if (HasBit(free_names, M(STR_SV_STNAME_MINES))) {
00282     if (CountMapSquareAround(tile, CMSAMine) >= 2) {
00283       return STR_SV_STNAME_MINES;
00284     }
00285   }
00286 
00287   /* check close enough to town to get central as name? */
00288   if (DistanceMax(tile, t->xy) < 8) {
00289     if (HasBit(free_names, M(STR_SV_STNAME))) return STR_SV_STNAME;
00290 
00291     if (HasBit(free_names, M(STR_SV_STNAME_CENTRAL))) return STR_SV_STNAME_CENTRAL;
00292   }
00293 
00294   /* Check lakeside */
00295   if (HasBit(free_names, M(STR_SV_STNAME_LAKESIDE)) &&
00296       DistanceFromEdge(tile) < 20 &&
00297       CountMapSquareAround(tile, CMSAWater) >= 5) {
00298     return STR_SV_STNAME_LAKESIDE;
00299   }
00300 
00301   /* Check woods */
00302   if (HasBit(free_names, M(STR_SV_STNAME_WOODS)) && (
00303         CountMapSquareAround(tile, CMSATree) >= 8 ||
00304         CountMapSquareAround(tile, IsTileForestIndustry) >= 2)
00305       ) {
00306     return _settings_game.game_creation.landscape == LT_TROPIC ? STR_SV_STNAME_FOREST : STR_SV_STNAME_WOODS;
00307   }
00308 
00309   /* check elevation compared to town */
00310   int z = GetTileZ(tile);
00311   int z2 = GetTileZ(t->xy);
00312   if (z < z2) {
00313     if (HasBit(free_names, M(STR_SV_STNAME_VALLEY))) return STR_SV_STNAME_VALLEY;
00314   } else if (z > z2) {
00315     if (HasBit(free_names, M(STR_SV_STNAME_HEIGHTS))) return STR_SV_STNAME_HEIGHTS;
00316   }
00317 
00318   /* check direction compared to town */
00319   static const int8 _direction_and_table[] = {
00320     ~( (1 << M(STR_SV_STNAME_WEST))  | (1 << M(STR_SV_STNAME_EAST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
00321     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_WEST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
00322     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_EAST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
00323     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_WEST)) | (1 << M(STR_SV_STNAME_EAST)) ),
00324   };
00325 
00326   free_names &= _direction_and_table[
00327     (TileX(tile) < TileX(t->xy)) +
00328     (TileY(tile) < TileY(t->xy)) * 2];
00329 
00330   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));
00331   return (tmp == 0) ? STR_SV_STNAME_FALLBACK : (STR_SV_STNAME + FindFirstBit(tmp));
00332 }
00333 #undef M
00334 
00340 static Station *GetClosestDeletedStation(TileIndex tile)
00341 {
00342   uint threshold = 8;
00343   Station *best_station = NULL;
00344   Station *st;
00345 
00346   FOR_ALL_STATIONS(st) {
00347     if (!st->IsInUse() && st->owner == _current_company) {
00348       uint cur_dist = DistanceManhattan(tile, st->xy);
00349 
00350       if (cur_dist < threshold) {
00351         threshold = cur_dist;
00352         best_station = st;
00353       }
00354     }
00355   }
00356 
00357   return best_station;
00358 }
00359 
00360 
00361 void Station::GetTileArea(TileArea *ta, StationType type) const
00362 {
00363   switch (type) {
00364     case STATION_RAIL:
00365       *ta = this->train_station;
00366       return;
00367 
00368     case STATION_AIRPORT:
00369       *ta = this->airport;
00370       return;
00371 
00372     case STATION_TRUCK:
00373       *ta = this->truck_station;
00374       return;
00375 
00376     case STATION_BUS:
00377       *ta = this->bus_station;
00378       return;
00379 
00380     case STATION_DOCK:
00381     case STATION_OILRIG:
00382       ta->tile = this->dock_tile;
00383       break;
00384 
00385     default: NOT_REACHED();
00386   }
00387 
00388   ta->w = 1;
00389   ta->h = 1;
00390 }
00391 
00395 void Station::UpdateVirtCoord()
00396 {
00397   Point pt = RemapCoords2(TileX(this->xy) * TILE_SIZE, TileY(this->xy) * TILE_SIZE);
00398 
00399   pt.y -= 32 * ZOOM_LVL_BASE;
00400   if ((this->facilities & FACIL_AIRPORT) && this->airport.type == AT_OILRIG) pt.y -= 16 * ZOOM_LVL_BASE;
00401 
00402   SetDParam(0, this->index);
00403   SetDParam(1, this->facilities);
00404   this->sign.UpdatePosition(pt.x, pt.y, STR_VIEWPORT_STATION);
00405 
00406   SetWindowDirty(WC_STATION_VIEW, this->index);
00407 }
00408 
00410 void UpdateAllStationVirtCoords()
00411 {
00412   BaseStation *st;
00413 
00414   FOR_ALL_BASE_STATIONS(st) {
00415     st->UpdateVirtCoord();
00416   }
00417 }
00418 
00424 static uint GetAcceptanceMask(const Station *st)
00425 {
00426   uint mask = 0;
00427 
00428   for (CargoID i = 0; i < NUM_CARGO; i++) {
00429     if (HasBit(st->goods[i].acceptance_pickup, GoodsEntry::GES_ACCEPTANCE)) mask |= 1 << i;
00430   }
00431   return mask;
00432 }
00433 
00438 static void ShowRejectOrAcceptNews(const Station *st, uint num_items, CargoID *cargo, StringID msg)
00439 {
00440   for (uint i = 0; i < num_items; i++) {
00441     SetDParam(i + 1, CargoSpec::Get(cargo[i])->name);
00442   }
00443 
00444   SetDParam(0, st->index);
00445   AddNewsItem(msg, NT_ACCEPTANCE, NF_INCOLOUR | NF_SMALL, NR_STATION, st->index);
00446 }
00447 
00455 CargoArray GetProductionAroundTiles(TileIndex tile, int w, int h, int rad)
00456 {
00457   CargoArray produced;
00458 
00459   int x = TileX(tile);
00460   int y = TileY(tile);
00461 
00462   /* expand the region by rad tiles on each side
00463    * while making sure that we remain inside the board. */
00464   int x2 = min(x + w + rad, MapSizeX());
00465   int x1 = max(x - rad, 0);
00466 
00467   int y2 = min(y + h + rad, MapSizeY());
00468   int y1 = max(y - rad, 0);
00469 
00470   assert(x1 < x2);
00471   assert(y1 < y2);
00472   assert(w > 0);
00473   assert(h > 0);
00474 
00475   TileArea ta(TileXY(x1, y1), TileXY(x2 - 1, y2 - 1));
00476 
00477   /* Loop over all tiles to get the produced cargo of
00478    * everything except industries */
00479   TILE_AREA_LOOP(tile, ta) AddProducedCargo(tile, produced);
00480 
00481   /* Loop over the industries. They produce cargo for
00482    * anything that is within 'rad' from their bounding
00483    * box. As such if you have e.g. a oil well the tile
00484    * area loop might not hit an industry tile while
00485    * the industry would produce cargo for the station.
00486    */
00487   const Industry *i;
00488   FOR_ALL_INDUSTRIES(i) {
00489     if (!ta.Intersects(i->location)) continue;
00490 
00491     for (uint j = 0; j < lengthof(i->produced_cargo); j++) {
00492       CargoID cargo = i->produced_cargo[j];
00493       if (cargo != CT_INVALID) produced[cargo]++;
00494     }
00495   }
00496 
00497   return produced;
00498 }
00499 
00508 CargoArray GetAcceptanceAroundTiles(TileIndex tile, int w, int h, int rad, uint32 *always_accepted)
00509 {
00510   CargoArray acceptance;
00511   if (always_accepted != NULL) *always_accepted = 0;
00512 
00513   int x = TileX(tile);
00514   int y = TileY(tile);
00515 
00516   /* expand the region by rad tiles on each side
00517    * while making sure that we remain inside the board. */
00518   int x2 = min(x + w + rad, MapSizeX());
00519   int y2 = min(y + h + rad, MapSizeY());
00520   int x1 = max(x - rad, 0);
00521   int y1 = max(y - rad, 0);
00522 
00523   assert(x1 < x2);
00524   assert(y1 < y2);
00525   assert(w > 0);
00526   assert(h > 0);
00527 
00528   for (int yc = y1; yc != y2; yc++) {
00529     for (int xc = x1; xc != x2; xc++) {
00530       TileIndex tile = TileXY(xc, yc);
00531       AddAcceptedCargo(tile, acceptance, always_accepted);
00532     }
00533   }
00534 
00535   return acceptance;
00536 }
00537 
00543 void UpdateStationAcceptance(Station *st, bool show_msg)
00544 {
00545   /* old accepted goods types */
00546   uint old_acc = GetAcceptanceMask(st);
00547 
00548   /* And retrieve the acceptance. */
00549   CargoArray acceptance;
00550   if (!st->rect.IsEmpty()) {
00551     acceptance = GetAcceptanceAroundTiles(
00552       TileXY(st->rect.left, st->rect.top),
00553       st->rect.right  - st->rect.left + 1,
00554       st->rect.bottom - st->rect.top  + 1,
00555       st->GetCatchmentRadius(),
00556       &st->always_accepted
00557     );
00558   }
00559 
00560   /* Adjust in case our station only accepts fewer kinds of goods */
00561   for (CargoID i = 0; i < NUM_CARGO; i++) {
00562     uint amt = min(acceptance[i], 15);
00563 
00564     /* Make sure the station can accept the goods type. */
00565     bool is_passengers = IsCargoInClass(i, CC_PASSENGERS);
00566     if ((!is_passengers && !(st->facilities & ~FACIL_BUS_STOP)) ||
00567         (is_passengers && !(st->facilities & ~FACIL_TRUCK_STOP))) {
00568       amt = 0;
00569     }
00570 
00571     SB(st->goods[i].acceptance_pickup, GoodsEntry::GES_ACCEPTANCE, 1, amt >= 8);
00572   }
00573 
00574   /* Only show a message in case the acceptance was actually changed. */
00575   uint new_acc = GetAcceptanceMask(st);
00576   if (old_acc == new_acc) return;
00577 
00578   /* show a message to report that the acceptance was changed? */
00579   if (show_msg && st->owner == _local_company && st->IsInUse()) {
00580     /* List of accept and reject strings for different number of
00581      * cargo types */
00582     static const StringID accept_msg[] = {
00583       STR_NEWS_STATION_NOW_ACCEPTS_CARGO,
00584       STR_NEWS_STATION_NOW_ACCEPTS_CARGO_AND_CARGO,
00585     };
00586     static const StringID reject_msg[] = {
00587       STR_NEWS_STATION_NO_LONGER_ACCEPTS_CARGO,
00588       STR_NEWS_STATION_NO_LONGER_ACCEPTS_CARGO_OR_CARGO,
00589     };
00590 
00591     /* Array of accepted and rejected cargo types */
00592     CargoID accepts[2] = { CT_INVALID, CT_INVALID };
00593     CargoID rejects[2] = { CT_INVALID, CT_INVALID };
00594     uint num_acc = 0;
00595     uint num_rej = 0;
00596 
00597     /* Test each cargo type to see if its acceptance has changed */
00598     for (CargoID i = 0; i < NUM_CARGO; i++) {
00599       if (HasBit(new_acc, i)) {
00600         if (!HasBit(old_acc, i) && num_acc < lengthof(accepts)) {
00601           /* New cargo is accepted */
00602           accepts[num_acc++] = i;
00603         }
00604       } else {
00605         if (HasBit(old_acc, i) && num_rej < lengthof(rejects)) {
00606           /* Old cargo is no longer accepted */
00607           rejects[num_rej++] = i;
00608         }
00609       }
00610     }
00611 
00612     /* Show news message if there are any changes */
00613     if (num_acc > 0) ShowRejectOrAcceptNews(st, num_acc, accepts, accept_msg[num_acc - 1]);
00614     if (num_rej > 0) ShowRejectOrAcceptNews(st, num_rej, rejects, reject_msg[num_rej - 1]);
00615   }
00616 
00617   /* redraw the station view since acceptance changed */
00618   SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_ACCEPT_RATING_LIST);
00619 }
00620 
00621 static void UpdateStationSignCoord(BaseStation *st)
00622 {
00623   const StationRect *r = &st->rect;
00624 
00625   if (r->IsEmpty()) return; // no tiles belong to this station
00626 
00627   /* clamp sign coord to be inside the station rect */
00628   st->xy = TileXY(ClampU(TileX(st->xy), r->left, r->right), ClampU(TileY(st->xy), r->top, r->bottom));
00629   st->UpdateVirtCoord();
00630 }
00631 
00641 static CommandCost BuildStationPart(Station **st, DoCommandFlag flags, bool reuse, TileArea area, StationNaming name_class)
00642 {
00643   /* Find a deleted station close to us */
00644   if (*st == NULL && reuse) *st = GetClosestDeletedStation(area.tile);
00645 
00646   if (*st != NULL) {
00647     if ((*st)->owner != _current_company) {
00648       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
00649     }
00650 
00651     CommandCost ret = (*st)->rect.BeforeAddRect(area.tile, area.w, area.h, StationRect::ADD_TEST);
00652     if (ret.Failed()) return ret;
00653   } else {
00654     /* allocate and initialize new station */
00655     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
00656 
00657     if (flags & DC_EXEC) {
00658       *st = new Station(area.tile);
00659 
00660       (*st)->town = ClosestTownFromTile(area.tile, UINT_MAX);
00661       (*st)->string_id = GenerateStationName(*st, area.tile, name_class);
00662 
00663       if (Company::IsValidID(_current_company)) {
00664         SetBit((*st)->town->have_ratings, _current_company);
00665       }
00666     }
00667   }
00668   return CommandCost();
00669 }
00670 
00677 static void DeleteStationIfEmpty(BaseStation *st)
00678 {
00679   if (!st->IsInUse()) {
00680     st->delete_ctr = 0;
00681     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
00682   }
00683   /* station remains but it probably lost some parts - station sign should stay in the station boundaries */
00684   UpdateStationSignCoord(st);
00685 }
00686 
00687 CommandCost ClearTile_Station(TileIndex tile, DoCommandFlag flags);
00688 
00698 CommandCost CheckBuildableTile(TileIndex tile, uint invalid_dirs, int &allowed_z, bool allow_steep, bool check_bridge = true)
00699 {
00700   if (check_bridge && MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) {
00701     return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
00702   }
00703 
00704   CommandCost ret = EnsureNoVehicleOnGround(tile);
00705   if (ret.Failed()) return ret;
00706 
00707   int z;
00708   Slope tileh = GetTileSlope(tile, &z);
00709 
00710   /* Prohibit building if
00711    *   1) The tile is "steep" (i.e. stretches two height levels).
00712    *   2) The tile is non-flat and the build_on_slopes switch is disabled.
00713    */
00714   if ((!allow_steep && IsSteepSlope(tileh)) ||
00715       ((!_settings_game.construction.build_on_slopes) && tileh != SLOPE_FLAT)) {
00716     return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00717   }
00718 
00719   CommandCost cost(EXPENSES_CONSTRUCTION);
00720   int flat_z = z + GetSlopeMaxZ(tileh);
00721   if (tileh != SLOPE_FLAT) {
00722     /* Forbid building if the tile faces a slope in a invalid direction. */
00723     for (DiagDirection dir = DIAGDIR_BEGIN; dir != DIAGDIR_END; dir++) {
00724       if (HasBit(invalid_dirs, dir) && !CanBuildDepotByTileh(dir, tileh)) {
00725         return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00726       }
00727     }
00728     cost.AddCost(_price[PR_BUILD_FOUNDATION]);
00729   }
00730 
00731   /* The level of this tile must be equal to allowed_z. */
00732   if (allowed_z < 0) {
00733     /* First tile. */
00734     allowed_z = flat_z;
00735   } else if (allowed_z != flat_z) {
00736     return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00737   }
00738 
00739   return cost;
00740 }
00741 
00748 CommandCost CheckFlatLand(TileArea tile_area, DoCommandFlag flags)
00749 {
00750   CommandCost cost(EXPENSES_CONSTRUCTION);
00751   int allowed_z = -1;
00752 
00753   TILE_AREA_LOOP(tile_cur, tile_area) {
00754     CommandCost ret = CheckBuildableTile(tile_cur, 0, allowed_z, true);
00755     if (ret.Failed()) return ret;
00756     cost.AddCost(ret);
00757 
00758     ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00759     if (ret.Failed()) return ret;
00760     cost.AddCost(ret);
00761   }
00762 
00763   return cost;
00764 }
00765 
00780 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)
00781 {
00782   CommandCost cost(EXPENSES_CONSTRUCTION);
00783   int allowed_z = -1;
00784   uint invalid_dirs = 5 << axis;
00785 
00786   const StationSpec *statspec = StationClass::Get(spec_class)->GetSpec(spec_index);
00787   bool slope_cb = statspec != NULL && HasBit(statspec->callback_mask, CBM_STATION_SLOPE_CHECK);
00788 
00789   TILE_AREA_LOOP(tile_cur, tile_area) {
00790     CommandCost ret = CheckBuildableTile(tile_cur, invalid_dirs, allowed_z, false);
00791     if (ret.Failed()) return ret;
00792     cost.AddCost(ret);
00793 
00794     if (slope_cb) {
00795       /* Do slope check if requested. */
00796       ret = PerformStationTileSlopeCheck(tile_area.tile, tile_cur, statspec, axis, plat_len, numtracks);
00797       if (ret.Failed()) return ret;
00798     }
00799 
00800     /* if station is set, then we have special handling to allow building on top of already existing stations.
00801      * so station points to INVALID_STATION if we can build on any station.
00802      * Or it points to a station if we're only allowed to build on exactly that station. */
00803     if (station != NULL && IsTileType(tile_cur, MP_STATION)) {
00804       if (!IsRailStation(tile_cur)) {
00805         return ClearTile_Station(tile_cur, DC_AUTO); // get error message
00806       } else {
00807         StationID st = GetStationIndex(tile_cur);
00808         if (*station == INVALID_STATION) {
00809           *station = st;
00810         } else if (*station != st) {
00811           return_cmd_error(STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING);
00812         }
00813       }
00814     } else {
00815       /* Rail type is only valid when building a railway station; if station to
00816        * build isn't a rail station it's INVALID_RAILTYPE. */
00817       if (rt != INVALID_RAILTYPE &&
00818           IsPlainRailTile(tile_cur) && !HasSignals(tile_cur) &&
00819           HasPowerOnRail(GetRailType(tile_cur), rt)) {
00820         /* Allow overbuilding if the tile:
00821          *  - has rail, but no signals
00822          *  - it has exactly one track
00823          *  - the track is in line with the station
00824          *  - the current rail type has power on the to-be-built type (e.g. convert normal rail to el rail)
00825          */
00826         TrackBits tracks = GetTrackBits(tile_cur);
00827         Track track = RemoveFirstTrack(&tracks);
00828         Track expected_track = HasBit(invalid_dirs, DIAGDIR_NE) ? TRACK_X : TRACK_Y;
00829 
00830         if (tracks == TRACK_BIT_NONE && track == expected_track) {
00831           /* Check for trains having a reservation for this tile. */
00832           if (HasBit(GetRailReservationTrackBits(tile_cur), track)) {
00833             Train *v = GetTrainForReservation(tile_cur, track);
00834             if (v != NULL) {
00835               *affected_vehicles.Append() = v;
00836             }
00837           }
00838           CommandCost ret = DoCommand(tile_cur, 0, track, flags, CMD_REMOVE_SINGLE_RAIL);
00839           if (ret.Failed()) return ret;
00840           cost.AddCost(ret);
00841           /* With flags & ~DC_EXEC CmdLandscapeClear would fail since the rail still exists */
00842           continue;
00843         }
00844       }
00845       ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00846       if (ret.Failed()) return ret;
00847       cost.AddCost(ret);
00848     }
00849   }
00850 
00851   return cost;
00852 }
00853 
00866 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)
00867 {
00868   CommandCost cost(EXPENSES_CONSTRUCTION);
00869   int allowed_z = -1;
00870 
00871   TILE_AREA_LOOP(cur_tile, tile_area) {
00872     CommandCost ret = CheckBuildableTile(cur_tile, invalid_dirs, allowed_z, !is_drive_through);
00873     if (ret.Failed()) return ret;
00874     cost.AddCost(ret);
00875 
00876     /* If station is set, then we have special handling to allow building on top of already existing stations.
00877      * Station points to INVALID_STATION if we can build on any station.
00878      * Or it points to a station if we're only allowed to build on exactly that station. */
00879     if (station != NULL && IsTileType(cur_tile, MP_STATION)) {
00880       if (!IsRoadStop(cur_tile)) {
00881         return ClearTile_Station(cur_tile, DC_AUTO); // Get error message.
00882       } else {
00883         if (is_truck_stop != IsTruckStop(cur_tile) ||
00884             is_drive_through != IsDriveThroughStopTile(cur_tile)) {
00885           return ClearTile_Station(cur_tile, DC_AUTO); // Get error message.
00886         }
00887         /* Drive-through station in the wrong direction. */
00888         if (is_drive_through && IsDriveThroughStopTile(cur_tile) && DiagDirToAxis(GetRoadStopDir(cur_tile)) != axis){
00889           return_cmd_error(STR_ERROR_DRIVE_THROUGH_DIRECTION);
00890         }
00891         StationID st = GetStationIndex(cur_tile);
00892         if (*station == INVALID_STATION) {
00893           *station = st;
00894         } else if (*station != st) {
00895           return_cmd_error(STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING);
00896         }
00897       }
00898     } else {
00899       bool build_over_road = is_drive_through && IsNormalRoadTile(cur_tile);
00900       /* Road bits in the wrong direction. */
00901       RoadBits rb = IsNormalRoadTile(cur_tile) ? GetAllRoadBits(cur_tile) : ROAD_NONE;
00902       if (build_over_road && (rb & (axis == AXIS_X ? ROAD_Y : ROAD_X)) != 0) {
00903         /* Someone was pedantic and *NEEDED* three fracking different error messages. */
00904         switch (CountBits(rb)) {
00905           case 1:
00906             return_cmd_error(STR_ERROR_DRIVE_THROUGH_DIRECTION);
00907 
00908           case 2:
00909             if (rb == ROAD_X || rb == ROAD_Y) return_cmd_error(STR_ERROR_DRIVE_THROUGH_DIRECTION);
00910             return_cmd_error(STR_ERROR_DRIVE_THROUGH_CORNER);
00911 
00912           default: // 3 or 4
00913             return_cmd_error(STR_ERROR_DRIVE_THROUGH_JUNCTION);
00914         }
00915       }
00916 
00917       RoadTypes cur_rts = IsNormalRoadTile(cur_tile) ? GetRoadTypes(cur_tile) : ROADTYPES_NONE;
00918       uint num_roadbits = 0;
00919       if (build_over_road) {
00920         /* There is a road, check if we can build road+tram stop over it. */
00921         if (HasBit(cur_rts, ROADTYPE_ROAD)) {
00922           Owner road_owner = GetRoadOwner(cur_tile, ROADTYPE_ROAD);
00923           if (road_owner == OWNER_TOWN) {
00924             if (!_settings_game.construction.road_stop_on_town_road) return_cmd_error(STR_ERROR_DRIVE_THROUGH_ON_TOWN_ROAD);
00925           } else if (!_settings_game.construction.road_stop_on_competitor_road && road_owner != OWNER_NONE) {
00926             CommandCost ret = CheckOwnership(road_owner);
00927             if (ret.Failed()) return ret;
00928           }
00929           num_roadbits += CountBits(GetRoadBits(cur_tile, ROADTYPE_ROAD));
00930         }
00931 
00932         /* There is a tram, check if we can build road+tram stop over it. */
00933         if (HasBit(cur_rts, ROADTYPE_TRAM)) {
00934           Owner tram_owner = GetRoadOwner(cur_tile, ROADTYPE_TRAM);
00935           if (!_settings_game.construction.road_stop_on_competitor_road && tram_owner != OWNER_NONE) {
00936             CommandCost ret = CheckOwnership(tram_owner);
00937             if (ret.Failed()) return ret;
00938           }
00939           num_roadbits += CountBits(GetRoadBits(cur_tile, ROADTYPE_TRAM));
00940         }
00941 
00942         /* Take into account existing roadbits. */
00943         rts |= cur_rts;
00944       } else {
00945         ret = DoCommand(cur_tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00946         if (ret.Failed()) return ret;
00947         cost.AddCost(ret);
00948       }
00949 
00950       uint roadbits_to_build = CountBits(rts) * 2 - num_roadbits;
00951       cost.AddCost(_price[PR_BUILD_ROAD] * roadbits_to_build);
00952     }
00953   }
00954 
00955   return cost;
00956 }
00957 
00965 CommandCost CanExpandRailStation(const BaseStation *st, TileArea &new_ta, Axis axis)
00966 {
00967   TileArea cur_ta = st->train_station;
00968 
00969   /* determine new size of train station region.. */
00970   int x = min(TileX(cur_ta.tile), TileX(new_ta.tile));
00971   int y = min(TileY(cur_ta.tile), TileY(new_ta.tile));
00972   new_ta.w = max(TileX(cur_ta.tile) + cur_ta.w, TileX(new_ta.tile) + new_ta.w) - x;
00973   new_ta.h = max(TileY(cur_ta.tile) + cur_ta.h, TileY(new_ta.tile) + new_ta.h) - y;
00974   new_ta.tile = TileXY(x, y);
00975 
00976   /* make sure the final size is not too big. */
00977   if (new_ta.w > _settings_game.station.station_spread || new_ta.h > _settings_game.station.station_spread) {
00978     return_cmd_error(STR_ERROR_STATION_TOO_SPREAD_OUT);
00979   }
00980 
00981   return CommandCost();
00982 }
00983 
00984 static inline byte *CreateSingle(byte *layout, int n)
00985 {
00986   int i = n;
00987   do *layout++ = 0; while (--i);
00988   layout[((n - 1) >> 1) - n] = 2;
00989   return layout;
00990 }
00991 
00992 static inline byte *CreateMulti(byte *layout, int n, byte b)
00993 {
00994   int i = n;
00995   do *layout++ = b; while (--i);
00996   if (n > 4) {
00997     layout[0 - n] = 0;
00998     layout[n - 1 - n] = 0;
00999   }
01000   return layout;
01001 }
01002 
01010 void GetStationLayout(byte *layout, int numtracks, int plat_len, const StationSpec *statspec)
01011 {
01012   if (statspec != NULL && statspec->lengths >= plat_len &&
01013       statspec->platforms[plat_len - 1] >= numtracks &&
01014       statspec->layouts[plat_len - 1][numtracks - 1]) {
01015     /* Custom layout defined, follow it. */
01016     memcpy(layout, statspec->layouts[plat_len - 1][numtracks - 1],
01017       plat_len * numtracks);
01018     return;
01019   }
01020 
01021   if (plat_len == 1) {
01022     CreateSingle(layout, numtracks);
01023   } else {
01024     if (numtracks & 1) layout = CreateSingle(layout, plat_len);
01025     numtracks >>= 1;
01026 
01027     while (--numtracks >= 0) {
01028       layout = CreateMulti(layout, plat_len, 4);
01029       layout = CreateMulti(layout, plat_len, 6);
01030     }
01031   }
01032 }
01033 
01045 template <class T, StringID error_message>
01046 CommandCost FindJoiningBaseStation(StationID existing_station, StationID station_to_join, bool adjacent, TileArea ta, T **st)
01047 {
01048   assert(*st == NULL);
01049   bool check_surrounding = true;
01050 
01051   if (_settings_game.station.adjacent_stations) {
01052     if (existing_station != INVALID_STATION) {
01053       if (adjacent && existing_station != station_to_join) {
01054         /* You can't build an adjacent station over the top of one that
01055          * already exists. */
01056         return_cmd_error(error_message);
01057       } else {
01058         /* Extend the current station, and don't check whether it will
01059          * be near any other stations. */
01060         *st = T::GetIfValid(existing_station);
01061         check_surrounding = (*st == NULL);
01062       }
01063     } else {
01064       /* There's no station here. Don't check the tiles surrounding this
01065        * one if the company wanted to build an adjacent station. */
01066       if (adjacent) check_surrounding = false;
01067     }
01068   }
01069 
01070   if (check_surrounding) {
01071     /* Make sure there are no similar stations around us. */
01072     CommandCost ret = GetStationAround(ta, existing_station, st);
01073     if (ret.Failed()) return ret;
01074   }
01075 
01076   /* Distant join */
01077   if (*st == NULL && station_to_join != INVALID_STATION) *st = T::GetIfValid(station_to_join);
01078 
01079   return CommandCost();
01080 }
01081 
01091 static CommandCost FindJoiningStation(StationID existing_station, StationID station_to_join, bool adjacent, TileArea ta, Station **st)
01092 {
01093   return FindJoiningBaseStation<Station, STR_ERROR_MUST_REMOVE_RAILWAY_STATION_FIRST>(existing_station, station_to_join, adjacent, ta, st);
01094 }
01095 
01105 CommandCost FindJoiningWaypoint(StationID existing_waypoint, StationID waypoint_to_join, bool adjacent, TileArea ta, Waypoint **wp)
01106 {
01107   return FindJoiningBaseStation<Waypoint, STR_ERROR_MUST_REMOVE_RAILWAYPOINT_FIRST>(existing_waypoint, waypoint_to_join, adjacent, ta, wp);
01108 }
01109 
01127 CommandCost CmdBuildRailStation(TileIndex tile_org, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01128 {
01129   /* Unpack parameters */
01130   RailType rt    = Extract<RailType, 0, 4>(p1);
01131   Axis axis      = Extract<Axis, 4, 1>(p1);
01132   byte numtracks = GB(p1,  8, 8);
01133   byte plat_len  = GB(p1, 16, 8);
01134   bool adjacent  = HasBit(p1, 24);
01135 
01136   StationClassID spec_class = Extract<StationClassID, 0, 8>(p2);
01137   byte spec_index           = GB(p2, 8, 8);
01138   StationID station_to_join = GB(p2, 16, 16);
01139 
01140   /* Does the authority allow this? */
01141   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile_org, flags);
01142   if (ret.Failed()) return ret;
01143 
01144   if (!ValParamRailtype(rt)) return CMD_ERROR;
01145 
01146   /* Check if the given station class is valid */
01147   if ((uint)spec_class >= StationClass::GetClassCount() || spec_class == STAT_CLASS_WAYP) return CMD_ERROR;
01148   if (spec_index >= StationClass::Get(spec_class)->GetSpecCount()) return CMD_ERROR;
01149   if (plat_len == 0 || numtracks == 0) return CMD_ERROR;
01150 
01151   int w_org, h_org;
01152   if (axis == AXIS_X) {
01153     w_org = plat_len;
01154     h_org = numtracks;
01155   } else {
01156     h_org = plat_len;
01157     w_org = numtracks;
01158   }
01159 
01160   bool reuse = (station_to_join != NEW_STATION);
01161   if (!reuse) station_to_join = INVALID_STATION;
01162   bool distant_join = (station_to_join != INVALID_STATION);
01163 
01164   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
01165 
01166   if (h_org > _settings_game.station.station_spread || w_org > _settings_game.station.station_spread) return CMD_ERROR;
01167 
01168   /* these values are those that will be stored in train_tile and station_platforms */
01169   TileArea new_location(tile_org, w_org, h_org);
01170 
01171   /* Make sure the area below consists of clear tiles. (OR tiles belonging to a certain rail station) */
01172   StationID est = INVALID_STATION;
01173   SmallVector<Train *, 4> affected_vehicles;
01174   /* Clear the land below the station. */
01175   CommandCost cost = CheckFlatLandRailStation(new_location, flags, axis, &est, rt, affected_vehicles, spec_class, spec_index, plat_len, numtracks);
01176   if (cost.Failed()) return cost;
01177   /* Add construction expenses. */
01178   cost.AddCost((numtracks * _price[PR_BUILD_STATION_RAIL] + _price[PR_BUILD_STATION_RAIL_LENGTH]) * plat_len);
01179   cost.AddCost(numtracks * plat_len * RailBuildCost(rt));
01180 
01181   Station *st = NULL;
01182   ret = FindJoiningStation(est, station_to_join, adjacent, new_location, &st);
01183   if (ret.Failed()) return ret;
01184 
01185   ret = BuildStationPart(&st, flags, reuse, new_location, STATIONNAMING_RAIL);
01186   if (ret.Failed()) return ret;
01187 
01188   if (st != NULL && st->train_station.tile != INVALID_TILE) {
01189     CommandCost ret = CanExpandRailStation(st, new_location, axis);
01190     if (ret.Failed()) return ret;
01191   }
01192 
01193   /* Check if we can allocate a custom stationspec to this station */
01194   const StationSpec *statspec = StationClass::Get(spec_class)->GetSpec(spec_index);
01195   int specindex = AllocateSpecToStation(statspec, st, (flags & DC_EXEC) != 0);
01196   if (specindex == -1) return_cmd_error(STR_ERROR_TOO_MANY_STATION_SPECS);
01197 
01198   if (statspec != NULL) {
01199     /* Perform NewStation checks */
01200 
01201     /* Check if the station size is permitted */
01202     if (HasBit(statspec->disallowed_platforms, numtracks - 1) || HasBit(statspec->disallowed_lengths, plat_len - 1)) {
01203       return CMD_ERROR;
01204     }
01205 
01206     /* Check if the station is buildable */
01207     if (HasBit(statspec->callback_mask, CBM_STATION_AVAIL)) {
01208       uint16 cb_res = GetStationCallback(CBID_STATION_AVAILABILITY, 0, 0, statspec, NULL, INVALID_TILE);
01209       if (cb_res != CALLBACK_FAILED && !Convert8bitBooleanCallback(statspec->grf_prop.grffile, CBID_STATION_AVAILABILITY, cb_res)) return CMD_ERROR;
01210     }
01211   }
01212 
01213   if (flags & DC_EXEC) {
01214     TileIndexDiff tile_delta;
01215     byte *layout_ptr;
01216     byte numtracks_orig;
01217     Track track;
01218 
01219     st->train_station = new_location;
01220     st->AddFacility(FACIL_TRAIN, new_location.tile);
01221 
01222     st->rect.BeforeAddRect(tile_org, w_org, h_org, StationRect::ADD_TRY);
01223 
01224     if (statspec != NULL) {
01225       /* Include this station spec's animation trigger bitmask
01226        * in the station's cached copy. */
01227       st->cached_anim_triggers |= statspec->animation.triggers;
01228     }
01229 
01230     tile_delta = (axis == AXIS_X ? TileDiffXY(1, 0) : TileDiffXY(0, 1));
01231     track = AxisToTrack(axis);
01232 
01233     layout_ptr = AllocaM(byte, numtracks * plat_len);
01234     GetStationLayout(layout_ptr, numtracks, plat_len, statspec);
01235 
01236     numtracks_orig = numtracks;
01237 
01238     Company *c = Company::Get(st->owner);
01239     TileIndex tile_track = tile_org;
01240     do {
01241       TileIndex tile = tile_track;
01242       int w = plat_len;
01243       do {
01244         byte layout = *layout_ptr++;
01245         if (IsRailStationTile(tile) && HasStationReservation(tile)) {
01246           /* Check for trains having a reservation for this tile. */
01247           Train *v = GetTrainForReservation(tile, AxisToTrack(GetRailStationAxis(tile)));
01248           if (v != NULL) {
01249             FreeTrainTrackReservation(v);
01250             *affected_vehicles.Append() = v;
01251             if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), false);
01252             for (; v->Next() != NULL; v = v->Next()) { }
01253             if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), false);
01254           }
01255         }
01256 
01257         /* Railtype can change when overbuilding. */
01258         if (IsRailStationTile(tile)) {
01259           if (!IsStationTileBlocked(tile)) c->infrastructure.rail[GetRailType(tile)]--;
01260           c->infrastructure.station--;
01261         }
01262 
01263         /* Remove animation if overbuilding */
01264         DeleteAnimatedTile(tile);
01265         byte old_specindex = HasStationTileRail(tile) ? GetCustomStationSpecIndex(tile) : 0;
01266         MakeRailStation(tile, st->owner, st->index, axis, layout & ~1, rt);
01267         /* Free the spec if we overbuild something */
01268         DeallocateSpecFromStation(st, old_specindex);
01269 
01270         SetCustomStationSpecIndex(tile, specindex);
01271         SetStationTileRandomBits(tile, GB(Random(), 0, 4));
01272         SetAnimationFrame(tile, 0);
01273 
01274         if (!IsStationTileBlocked(tile)) c->infrastructure.rail[rt]++;
01275         c->infrastructure.station++;
01276 
01277         if (statspec != NULL) {
01278           /* Use a fixed axis for GetPlatformInfo as our platforms / numtracks are always the right way around */
01279           uint32 platinfo = GetPlatformInfo(AXIS_X, GetStationGfx(tile), plat_len, numtracks_orig, plat_len - w, numtracks_orig - numtracks, false);
01280 
01281           /* As the station is not yet completely finished, the station does not yet exist. */
01282           uint16 callback = GetStationCallback(CBID_STATION_TILE_LAYOUT, platinfo, 0, statspec, NULL, tile);
01283           if (callback != CALLBACK_FAILED) {
01284             if (callback < 8) {
01285               SetStationGfx(tile, (callback & ~1) + axis);
01286             } else {
01287               ErrorUnknownCallbackResult(statspec->grf_prop.grffile->grfid, CBID_STATION_TILE_LAYOUT, callback);
01288             }
01289           }
01290 
01291           /* Trigger station animation -- after building? */
01292           TriggerStationAnimation(st, tile, SAT_BUILT);
01293         }
01294 
01295         tile += tile_delta;
01296       } while (--w);
01297       AddTrackToSignalBuffer(tile_track, track, _current_company);
01298       YapfNotifyTrackLayoutChange(tile_track, track);
01299       tile_track += tile_delta ^ TileDiffXY(1, 1); // perpendicular to tile_delta
01300     } while (--numtracks);
01301 
01302     for (uint i = 0; i < affected_vehicles.Length(); ++i) {
01303       /* Restore reservations of trains. */
01304       Train *v = affected_vehicles[i];
01305       if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), true);
01306       TryPathReserve(v, true, true);
01307       for (; v->Next() != NULL; v = v->Next()) { }
01308       if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), true);
01309     }
01310 
01311     /* Check whether we need to expand the reservation of trains already on the station. */
01312     TileArea update_reservation_area;
01313     if (axis == AXIS_X) {
01314       update_reservation_area = TileArea(tile_org, 1, numtracks_orig);
01315     } else {
01316       update_reservation_area = TileArea(tile_org, numtracks_orig, 1);
01317     }
01318 
01319     TILE_AREA_LOOP(tile, update_reservation_area) {
01320       DiagDirection dir = AxisToDiagDir(axis);
01321       TileIndexDiff tile_offset = TileOffsByDiagDir(dir);
01322       TileIndex platform_begin = tile;
01323       TileIndex platform_end = tile;
01324 
01325       /* We can only account for tiles that are reachable from this tile, so ignore primarily blocked tiles while finding the platform begin and end. */
01326       for (TileIndex next_tile = platform_begin - tile_offset; IsCompatibleTrainStationTile(next_tile, platform_begin); next_tile -= tile_offset) {
01327         platform_begin = next_tile;
01328       }
01329       for (TileIndex next_tile = platform_end + tile_offset; IsCompatibleTrainStationTile(next_tile, platform_end); next_tile += tile_offset) {
01330         platform_end = next_tile;
01331       }
01332 
01333       /* If there is at least on reservation on the platform, we reserve the whole platform. */
01334       bool reservation = false;
01335       for (TileIndex t = platform_begin; !reservation && t <= platform_end; t += tile_offset) {
01336         reservation = HasStationReservation(t);
01337       }
01338 
01339       if (reservation) {
01340         SetRailStationPlatformReservation(platform_begin, dir, true);
01341       }
01342     }
01343 
01344     st->MarkTilesDirty(false);
01345     st->UpdateVirtCoord();
01346     UpdateStationAcceptance(st, false);
01347     st->RecomputeIndustriesNear();
01348     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
01349     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
01350     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_TRAINS);
01351     DirtyCompanyInfrastructureWindows(st->owner);
01352   }
01353 
01354   return cost;
01355 }
01356 
01357 static void MakeRailStationAreaSmaller(BaseStation *st)
01358 {
01359   TileArea ta = st->train_station;
01360 
01361 restart:
01362 
01363   /* too small? */
01364   if (ta.w != 0 && ta.h != 0) {
01365     /* check the left side, x = constant, y changes */
01366     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(0, i));) {
01367       /* the left side is unused? */
01368       if (++i == ta.h) {
01369         ta.tile += TileDiffXY(1, 0);
01370         ta.w--;
01371         goto restart;
01372       }
01373     }
01374 
01375     /* check the right side, x = constant, y changes */
01376     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(ta.w - 1, i));) {
01377       /* the right side is unused? */
01378       if (++i == ta.h) {
01379         ta.w--;
01380         goto restart;
01381       }
01382     }
01383 
01384     /* check the upper side, y = constant, x changes */
01385     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(i, 0));) {
01386       /* the left side is unused? */
01387       if (++i == ta.w) {
01388         ta.tile += TileDiffXY(0, 1);
01389         ta.h--;
01390         goto restart;
01391       }
01392     }
01393 
01394     /* check the lower side, y = constant, x changes */
01395     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(i, ta.h - 1));) {
01396       /* the left side is unused? */
01397       if (++i == ta.w) {
01398         ta.h--;
01399         goto restart;
01400       }
01401     }
01402   } else {
01403     ta.Clear();
01404   }
01405 
01406   st->train_station = ta;
01407 }
01408 
01419 template <class T>
01420 CommandCost RemoveFromRailBaseStation(TileArea ta, SmallVector<T *, 4> &affected_stations, DoCommandFlag flags, Money removal_cost, bool keep_rail)
01421 {
01422   /* Count of the number of tiles removed */
01423   int quantity = 0;
01424   CommandCost total_cost(EXPENSES_CONSTRUCTION);
01425 
01426   /* Do the action for every tile into the area */
01427   TILE_AREA_LOOP(tile, ta) {
01428     /* Make sure the specified tile is a rail station */
01429     if (!HasStationTileRail(tile)) continue;
01430 
01431     /* If there is a vehicle on ground, do not allow to remove (flood) the tile */
01432     CommandCost ret = EnsureNoVehicleOnGround(tile);
01433     if (ret.Failed()) continue;
01434 
01435     /* Check ownership of station */
01436     T *st = T::GetByTile(tile);
01437     if (st == NULL) continue;
01438 
01439     if (_current_company != OWNER_WATER) {
01440       CommandCost ret = CheckOwnership(st->owner);
01441       if (ret.Failed()) continue;
01442     }
01443 
01444     /* If we reached here, the tile is valid so increase the quantity of tiles we will remove */
01445     quantity++;
01446 
01447     if (keep_rail || IsStationTileBlocked(tile)) {
01448       /* Don't refund the 'steel' of the track when we keep the
01449        *  rail, or when the tile didn't have any rail at all. */
01450       total_cost.AddCost(-_price[PR_CLEAR_RAIL]);
01451     }
01452 
01453     if (flags & DC_EXEC) {
01454       /* read variables before the station tile is removed */
01455       uint specindex = GetCustomStationSpecIndex(tile);
01456       Track track = GetRailStationTrack(tile);
01457       Owner owner = GetTileOwner(tile);
01458       RailType rt = GetRailType(tile);
01459       Train *v = NULL;
01460 
01461       if (HasStationReservation(tile)) {
01462         v = GetTrainForReservation(tile, track);
01463         if (v != NULL) {
01464           /* Free train reservation. */
01465           FreeTrainTrackReservation(v);
01466           if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), false);
01467           Vehicle *temp = v;
01468           for (; temp->Next() != NULL; temp = temp->Next()) { }
01469           if (IsRailStationTile(temp->tile)) SetRailStationPlatformReservation(temp->tile, TrackdirToExitdir(ReverseTrackdir(temp->GetVehicleTrackdir())), false);
01470         }
01471       }
01472 
01473       bool build_rail = keep_rail && !IsStationTileBlocked(tile);
01474       if (!build_rail && !IsStationTileBlocked(tile)) Company::Get(owner)->infrastructure.rail[rt]--;
01475 
01476       DoClearSquare(tile);
01477       DeleteNewGRFInspectWindow(GSF_STATIONS, tile);
01478       if (build_rail) MakeRailNormal(tile, owner, TrackToTrackBits(track), rt);
01479       Company::Get(owner)->infrastructure.station--;
01480       DirtyCompanyInfrastructureWindows(owner);
01481 
01482       st->rect.AfterRemoveTile(st, tile);
01483       AddTrackToSignalBuffer(tile, track, owner);
01484       YapfNotifyTrackLayoutChange(tile, track);
01485 
01486       DeallocateSpecFromStation(st, specindex);
01487 
01488       affected_stations.Include(st);
01489 
01490       if (v != NULL) {
01491         /* Restore station reservation. */
01492         if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), true);
01493         TryPathReserve(v, true, true);
01494         for (; v->Next() != NULL; v = v->Next()) { }
01495         if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), true);
01496       }
01497     }
01498   }
01499 
01500   if (quantity == 0) return_cmd_error(STR_ERROR_THERE_IS_NO_STATION);
01501 
01502   for (T **stp = affected_stations.Begin(); stp != affected_stations.End(); stp++) {
01503     T *st = *stp;
01504 
01505     /* now we need to make the "spanned" area of the railway station smaller
01506      * if we deleted something at the edges.
01507      * we also need to adjust train_tile. */
01508     MakeRailStationAreaSmaller(st);
01509     UpdateStationSignCoord(st);
01510 
01511     /* if we deleted the whole station, delete the train facility. */
01512     if (st->train_station.tile == INVALID_TILE) {
01513       st->facilities &= ~FACIL_TRAIN;
01514       SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_TRAINS);
01515       st->UpdateVirtCoord();
01516       DeleteStationIfEmpty(st);
01517     }
01518   }
01519 
01520   total_cost.AddCost(quantity * removal_cost);
01521   return total_cost;
01522 }
01523 
01535 CommandCost CmdRemoveFromRailStation(TileIndex start, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01536 {
01537   TileIndex end = p1 == 0 ? start : p1;
01538   if (start >= MapSize() || end >= MapSize()) return CMD_ERROR;
01539 
01540   TileArea ta(start, end);
01541   SmallVector<Station *, 4> affected_stations;
01542 
01543   CommandCost ret = RemoveFromRailBaseStation(ta, affected_stations, flags, _price[PR_CLEAR_STATION_RAIL], HasBit(p2, 0));
01544   if (ret.Failed()) return ret;
01545 
01546   /* Do all station specific functions here. */
01547   for (Station **stp = affected_stations.Begin(); stp != affected_stations.End(); stp++) {
01548     Station *st = *stp;
01549 
01550     if (st->train_station.tile == INVALID_TILE) SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_TRAINS);
01551     st->MarkTilesDirty(false);
01552     st->RecomputeIndustriesNear();
01553   }
01554 
01555   /* Now apply the rail cost to the number that we deleted */
01556   return ret;
01557 }
01558 
01570 CommandCost CmdRemoveFromRailWaypoint(TileIndex start, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01571 {
01572   TileIndex end = p1 == 0 ? start : p1;
01573   if (start >= MapSize() || end >= MapSize()) return CMD_ERROR;
01574 
01575   TileArea ta(start, end);
01576   SmallVector<Waypoint *, 4> affected_stations;
01577 
01578   return RemoveFromRailBaseStation(ta, affected_stations, flags, _price[PR_CLEAR_WAYPOINT_RAIL], HasBit(p2, 0));
01579 }
01580 
01581 
01589 template <class T>
01590 CommandCost RemoveRailStation(T *st, DoCommandFlag flags)
01591 {
01592   /* Current company owns the station? */
01593   if (_current_company != OWNER_WATER) {
01594     CommandCost ret = CheckOwnership(st->owner);
01595     if (ret.Failed()) return ret;
01596   }
01597 
01598   /* determine width and height of platforms */
01599   TileArea ta = st->train_station;
01600 
01601   assert(ta.w != 0 && ta.h != 0);
01602 
01603   CommandCost cost(EXPENSES_CONSTRUCTION);
01604   /* clear all areas of the station */
01605   TILE_AREA_LOOP(tile, ta) {
01606     /* only remove tiles that are actually train station tiles */
01607     if (!st->TileBelongsToRailStation(tile)) continue;
01608 
01609     CommandCost ret = EnsureNoVehicleOnGround(tile);
01610     if (ret.Failed()) return ret;
01611 
01612     cost.AddCost(_price[PR_CLEAR_STATION_RAIL]);
01613     if (flags & DC_EXEC) {
01614       /* read variables before the station tile is removed */
01615       Track track = GetRailStationTrack(tile);
01616       Owner owner = GetTileOwner(tile); // _current_company can be OWNER_WATER
01617       Train *v = NULL;
01618       if (HasStationReservation(tile)) {
01619         v = GetTrainForReservation(tile, track);
01620         if (v != NULL) FreeTrainTrackReservation(v);
01621       }
01622       if (!IsStationTileBlocked(tile)) Company::Get(owner)->infrastructure.rail[GetRailType(tile)]--;
01623       Company::Get(owner)->infrastructure.station--;
01624       DoClearSquare(tile);
01625       DeleteNewGRFInspectWindow(GSF_STATIONS, tile);
01626       AddTrackToSignalBuffer(tile, track, owner);
01627       YapfNotifyTrackLayoutChange(tile, track);
01628       if (v != NULL) TryPathReserve(v, true);
01629     }
01630   }
01631 
01632   if (flags & DC_EXEC) {
01633     st->rect.AfterRemoveRect(st, st->train_station);
01634 
01635     st->train_station.Clear();
01636 
01637     st->facilities &= ~FACIL_TRAIN;
01638 
01639     free(st->speclist);
01640     st->num_specs = 0;
01641     st->speclist  = NULL;
01642     st->cached_anim_triggers = 0;
01643 
01644     DirtyCompanyInfrastructureWindows(st->owner);
01645     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_TRAINS);
01646     st->UpdateVirtCoord();
01647     DeleteStationIfEmpty(st);
01648   }
01649 
01650   return cost;
01651 }
01652 
01659 static CommandCost RemoveRailStation(TileIndex tile, DoCommandFlag flags)
01660 {
01661   /* if there is flooding, remove platforms tile by tile */
01662   if (_current_company == OWNER_WATER) {
01663     return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAIL_STATION);
01664   }
01665 
01666   Station *st = Station::GetByTile(tile);
01667   CommandCost cost = RemoveRailStation(st, flags);
01668 
01669   if (flags & DC_EXEC) st->RecomputeIndustriesNear();
01670 
01671   return cost;
01672 }
01673 
01680 static CommandCost RemoveRailWaypoint(TileIndex tile, DoCommandFlag flags)
01681 {
01682   /* if there is flooding, remove waypoints tile by tile */
01683   if (_current_company == OWNER_WATER) {
01684     return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAIL_WAYPOINT);
01685   }
01686 
01687   return RemoveRailStation(Waypoint::GetByTile(tile), flags);
01688 }
01689 
01690 
01696 static RoadStop **FindRoadStopSpot(bool truck_station, Station *st)
01697 {
01698   RoadStop **primary_stop = (truck_station) ? &st->truck_stops : &st->bus_stops;
01699 
01700   if (*primary_stop == NULL) {
01701     /* we have no roadstop of the type yet, so write a "primary stop" */
01702     return primary_stop;
01703   } else {
01704     /* there are stops already, so append to the end of the list */
01705     RoadStop *stop = *primary_stop;
01706     while (stop->next != NULL) stop = stop->next;
01707     return &stop->next;
01708   }
01709 }
01710 
01711 static CommandCost RemoveRoadStop(TileIndex tile, DoCommandFlag flags);
01712 
01722 static CommandCost FindJoiningRoadStop(StationID existing_stop, StationID station_to_join, bool adjacent, TileArea ta, Station **st)
01723 {
01724   return FindJoiningBaseStation<Station, STR_ERROR_MUST_REMOVE_ROAD_STOP_FIRST>(existing_stop, station_to_join, adjacent, ta, st);
01725 }
01726 
01742 CommandCost CmdBuildRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01743 {
01744   bool type = HasBit(p2, 0);
01745   bool is_drive_through = HasBit(p2, 1);
01746   RoadTypes rts = Extract<RoadTypes, 2, 2>(p2);
01747   StationID station_to_join = GB(p2, 16, 16);
01748   bool reuse = (station_to_join != NEW_STATION);
01749   if (!reuse) station_to_join = INVALID_STATION;
01750   bool distant_join = (station_to_join != INVALID_STATION);
01751 
01752   uint8 width = (uint8)GB(p1, 0, 8);
01753   uint8 lenght = (uint8)GB(p1, 8, 8);
01754 
01755   /* Check if the requested road stop is too big */
01756   if (width > _settings_game.station.station_spread || lenght > _settings_game.station.station_spread) return_cmd_error(STR_ERROR_STATION_TOO_SPREAD_OUT);
01757   /* Check for incorrect width / length. */
01758   if (width == 0 || lenght == 0) return CMD_ERROR;
01759   /* Check if the first tile and the last tile are valid */
01760   if (!IsValidTile(tile) || TileAddWrap(tile, width - 1, lenght - 1) == INVALID_TILE) return CMD_ERROR;
01761 
01762   TileArea roadstop_area(tile, width, lenght);
01763 
01764   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
01765 
01766   if (!HasExactlyOneBit(rts) || !HasRoadTypesAvail(_current_company, rts)) return CMD_ERROR;
01767 
01768   /* Trams only have drive through stops */
01769   if (!is_drive_through && HasBit(rts, ROADTYPE_TRAM)) return CMD_ERROR;
01770 
01771   DiagDirection ddir = Extract<DiagDirection, 6, 2>(p2);
01772 
01773   /* Safeguard the parameters. */
01774   if (!IsValidDiagDirection(ddir)) return CMD_ERROR;
01775   /* If it is a drive-through stop, check for valid axis. */
01776   if (is_drive_through && !IsValidAxis((Axis)ddir)) return CMD_ERROR;
01777 
01778   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile, flags);
01779   if (ret.Failed()) return ret;
01780 
01781   /* Total road stop cost. */
01782   CommandCost cost(EXPENSES_CONSTRUCTION, roadstop_area.w * roadstop_area.h * _price[type ? PR_BUILD_STATION_TRUCK : PR_BUILD_STATION_BUS]);
01783   StationID est = INVALID_STATION;
01784   ret = CheckFlatLandRoadStop(roadstop_area, flags, is_drive_through ? 5 << ddir : 1 << ddir, is_drive_through, type, DiagDirToAxis(ddir), &est, rts);
01785   if (ret.Failed()) return ret;
01786   cost.AddCost(ret);
01787 
01788   Station *st = NULL;
01789   ret = FindJoiningRoadStop(est, station_to_join, HasBit(p2, 5), roadstop_area, &st);
01790   if (ret.Failed()) return ret;
01791 
01792   /* Check if this number of road stops can be allocated. */
01793   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);
01794 
01795   ret = BuildStationPart(&st, flags, reuse, roadstop_area, STATIONNAMING_ROAD);
01796   if (ret.Failed()) return ret;
01797 
01798   if (flags & DC_EXEC) {
01799     /* Check every tile in the area. */
01800     TILE_AREA_LOOP(cur_tile, roadstop_area) {
01801       RoadTypes cur_rts = GetRoadTypes(cur_tile);
01802       Owner road_owner = HasBit(cur_rts, ROADTYPE_ROAD) ? GetRoadOwner(cur_tile, ROADTYPE_ROAD) : _current_company;
01803       Owner tram_owner = HasBit(cur_rts, ROADTYPE_TRAM) ? GetRoadOwner(cur_tile, ROADTYPE_TRAM) : _current_company;
01804 
01805       if (IsTileType(cur_tile, MP_STATION) && IsRoadStop(cur_tile)) {
01806         RemoveRoadStop(cur_tile, flags);
01807       }
01808 
01809       RoadStop *road_stop = new RoadStop(cur_tile);
01810       /* Insert into linked list of RoadStops. */
01811       RoadStop **currstop = FindRoadStopSpot(type, st);
01812       *currstop = road_stop;
01813 
01814       if (type) {
01815         st->truck_station.Add(cur_tile);
01816       } else {
01817         st->bus_station.Add(cur_tile);
01818       }
01819 
01820       /* Initialize an empty station. */
01821       st->AddFacility((type) ? FACIL_TRUCK_STOP : FACIL_BUS_STOP, cur_tile);
01822 
01823       st->rect.BeforeAddTile(cur_tile, StationRect::ADD_TRY);
01824 
01825       RoadStopType rs_type = type ? ROADSTOP_TRUCK : ROADSTOP_BUS;
01826       if (is_drive_through) {
01827         /* Update company infrastructure counts. If the current tile is a normal
01828          * road tile, count only the new road bits needed to get a full diagonal road. */
01829         RoadType rt;
01830         FOR_EACH_SET_ROADTYPE(rt, cur_rts | rts) {
01831           Company *c = Company::GetIfValid(rt == ROADTYPE_ROAD ? road_owner : tram_owner);
01832           if (c != NULL) {
01833             c->infrastructure.road[rt] += 2 - (IsNormalRoadTile(cur_tile) && HasBit(cur_rts, rt) ? CountBits(GetRoadBits(cur_tile, rt)) : 0);
01834             DirtyCompanyInfrastructureWindows(c->index);
01835           }
01836         }
01837 
01838         MakeDriveThroughRoadStop(cur_tile, st->owner, road_owner, tram_owner, st->index, rs_type, rts | cur_rts, DiagDirToAxis(ddir));
01839         road_stop->MakeDriveThrough();
01840       } else {
01841         /* Non-drive-through stop never overbuild and always count as two road bits. */
01842         Company::Get(st->owner)->infrastructure.road[FIND_FIRST_BIT(rts)] += 2;
01843         MakeRoadStop(cur_tile, st->owner, st->index, rs_type, rts, ddir);
01844       }
01845       Company::Get(st->owner)->infrastructure.station++;
01846       DirtyCompanyInfrastructureWindows(st->owner);
01847 
01848       MarkTileDirtyByTile(cur_tile);
01849     }
01850   }
01851 
01852   if (st != NULL) {
01853     st->UpdateVirtCoord();
01854     UpdateStationAcceptance(st, false);
01855     st->RecomputeIndustriesNear();
01856     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
01857     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
01858     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_ROADVEHS);
01859   }
01860   return cost;
01861 }
01862 
01863 
01864 static Vehicle *ClearRoadStopStatusEnum(Vehicle *v, void *)
01865 {
01866   if (v->type == VEH_ROAD) {
01867     /* Okay... we are a road vehicle on a drive through road stop.
01868      * But that road stop has just been removed, so we need to make
01869      * sure we are in a valid state... however, vehicles can also
01870      * turn on road stop tiles, so only clear the 'road stop' state
01871      * bits and only when the state was 'in road stop', otherwise
01872      * we'll end up clearing the turn around bits. */
01873     RoadVehicle *rv = RoadVehicle::From(v);
01874     if (HasBit(rv->state, RVS_IN_DT_ROAD_STOP)) rv->state &= RVSB_ROAD_STOP_TRACKDIR_MASK;
01875   }
01876 
01877   return NULL;
01878 }
01879 
01880 
01887 static CommandCost RemoveRoadStop(TileIndex tile, DoCommandFlag flags)
01888 {
01889   Station *st = Station::GetByTile(tile);
01890 
01891   if (_current_company != OWNER_WATER) {
01892     CommandCost ret = CheckOwnership(st->owner);
01893     if (ret.Failed()) return ret;
01894   }
01895 
01896   bool is_truck = IsTruckStop(tile);
01897 
01898   RoadStop **primary_stop;
01899   RoadStop *cur_stop;
01900   if (is_truck) { // truck stop
01901     primary_stop = &st->truck_stops;
01902     cur_stop = RoadStop::GetByTile(tile, ROADSTOP_TRUCK);
01903   } else {
01904     primary_stop = &st->bus_stops;
01905     cur_stop = RoadStop::GetByTile(tile, ROADSTOP_BUS);
01906   }
01907 
01908   assert(cur_stop != NULL);
01909 
01910   /* don't do the check for drive-through road stops when company bankrupts */
01911   if (IsDriveThroughStopTile(tile) && (flags & DC_BANKRUPT)) {
01912     /* remove the 'going through road stop' status from all vehicles on that tile */
01913     if (flags & DC_EXEC) FindVehicleOnPos(tile, NULL, &ClearRoadStopStatusEnum);
01914   } else {
01915     CommandCost ret = EnsureNoVehicleOnGround(tile);
01916     if (ret.Failed()) return ret;
01917   }
01918 
01919   if (flags & DC_EXEC) {
01920     if (*primary_stop == cur_stop) {
01921       /* removed the first stop in the list */
01922       *primary_stop = cur_stop->next;
01923       /* removed the only stop? */
01924       if (*primary_stop == NULL) {
01925         st->facilities &= (is_truck ? ~FACIL_TRUCK_STOP : ~FACIL_BUS_STOP);
01926       }
01927     } else {
01928       /* tell the predecessor in the list to skip this stop */
01929       RoadStop *pred = *primary_stop;
01930       while (pred->next != cur_stop) pred = pred->next;
01931       pred->next = cur_stop->next;
01932     }
01933 
01934     /* Update company infrastructure counts. */
01935     RoadType rt;
01936     FOR_EACH_SET_ROADTYPE(rt, GetRoadTypes(tile)) {
01937       Company *c = Company::GetIfValid(GetRoadOwner(tile, rt));
01938       if (c != NULL) {
01939         c->infrastructure.road[rt] -= 2;
01940         DirtyCompanyInfrastructureWindows(c->index);
01941       }
01942     }
01943     Company::Get(st->owner)->infrastructure.station--;
01944 
01945     if (IsDriveThroughStopTile(tile)) {
01946       /* Clears the tile for us */
01947       cur_stop->ClearDriveThrough();
01948     } else {
01949       DoClearSquare(tile);
01950     }
01951 
01952     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_ROADVEHS);
01953     delete cur_stop;
01954 
01955     /* Make sure no vehicle is going to the old roadstop */
01956     RoadVehicle *v;
01957     FOR_ALL_ROADVEHICLES(v) {
01958       if (v->First() == v && v->current_order.IsType(OT_GOTO_STATION) &&
01959           v->dest_tile == tile) {
01960         v->dest_tile = v->GetOrderStationLocation(st->index);
01961       }
01962     }
01963 
01964     st->rect.AfterRemoveTile(st, tile);
01965 
01966     st->UpdateVirtCoord();
01967     st->RecomputeIndustriesNear();
01968     DeleteStationIfEmpty(st);
01969 
01970     /* Update the tile area of the truck/bus stop */
01971     if (is_truck) {
01972       st->truck_station.Clear();
01973       for (const RoadStop *rs = st->truck_stops; rs != NULL; rs = rs->next) st->truck_station.Add(rs->xy);
01974     } else {
01975       st->bus_station.Clear();
01976       for (const RoadStop *rs = st->bus_stops; rs != NULL; rs = rs->next) st->bus_station.Add(rs->xy);
01977     }
01978   }
01979 
01980   return CommandCost(EXPENSES_CONSTRUCTION, _price[is_truck ? PR_CLEAR_STATION_TRUCK : PR_CLEAR_STATION_BUS]);
01981 }
01982 
01993 CommandCost CmdRemoveRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01994 {
01995   uint8 width = (uint8)GB(p1, 0, 8);
01996   uint8 height = (uint8)GB(p1, 8, 8);
01997 
01998   /* Check for incorrect width / height. */
01999   if (width == 0 || height == 0) return CMD_ERROR;
02000   /* Check if the first tile and the last tile are valid */
02001   if (!IsValidTile(tile) || TileAddWrap(tile, width - 1, height - 1) == INVALID_TILE) return CMD_ERROR;
02002 
02003   TileArea roadstop_area(tile, width, height);
02004 
02005   int quantity = 0;
02006   CommandCost cost(EXPENSES_CONSTRUCTION);
02007   TILE_AREA_LOOP(cur_tile, roadstop_area) {
02008     /* Make sure the specified tile is a road stop of the correct type */
02009     if (!IsTileType(cur_tile, MP_STATION) || !IsRoadStop(cur_tile) || (uint32)GetRoadStopType(cur_tile) != GB(p2, 0, 1)) continue;
02010 
02011     /* Save the stop info before it is removed */
02012     bool is_drive_through = IsDriveThroughStopTile(cur_tile);
02013     RoadTypes rts = GetRoadTypes(cur_tile);
02014     RoadBits road_bits = IsDriveThroughStopTile(cur_tile) ?
02015         ((GetRoadStopDir(cur_tile) == DIAGDIR_NE) ? ROAD_X : ROAD_Y) :
02016         DiagDirToRoadBits(GetRoadStopDir(cur_tile));
02017 
02018     Owner road_owner = GetRoadOwner(cur_tile, ROADTYPE_ROAD);
02019     Owner tram_owner = GetRoadOwner(cur_tile, ROADTYPE_TRAM);
02020     CommandCost ret = RemoveRoadStop(cur_tile, flags);
02021     if (ret.Failed()) return ret;
02022     cost.AddCost(ret);
02023 
02024     quantity++;
02025     /* If the stop was a drive-through stop replace the road */
02026     if ((flags & DC_EXEC) && is_drive_through) {
02027       MakeRoadNormal(cur_tile, road_bits, rts, ClosestTownFromTile(cur_tile, UINT_MAX)->index,
02028           road_owner, tram_owner);
02029 
02030       /* Update company infrastructure counts. */
02031       RoadType rt;
02032       FOR_EACH_SET_ROADTYPE(rt, rts) {
02033         Company *c = Company::GetIfValid(GetRoadOwner(cur_tile, rt));
02034         if (c != NULL) {
02035           c->infrastructure.road[rt] += CountBits(road_bits);
02036           DirtyCompanyInfrastructureWindows(c->index);
02037         }
02038       }
02039     }
02040   }
02041 
02042   if (quantity == 0) return_cmd_error(STR_ERROR_THERE_IS_NO_STATION);
02043 
02044   return cost;
02045 }
02046 
02053 static uint GetMinimalAirportDistanceToTile(TileIterator &it, TileIndex town_tile)
02054 {
02055   uint mindist = UINT_MAX;
02056 
02057   for (TileIndex cur_tile = it; cur_tile != INVALID_TILE; cur_tile = ++it) {
02058     mindist = min(mindist, DistanceManhattan(town_tile, cur_tile));
02059   }
02060 
02061   return mindist;
02062 }
02063 
02073 uint8 GetAirportNoiseLevelForTown(const AirportSpec *as, TileIterator &it, TileIndex town_tile)
02074 {
02075   /* 0 cannot be accounted, and 1 is the lowest that can be reduced from town.
02076    * So no need to go any further*/
02077   if (as->noise_level < 2) return as->noise_level;
02078 
02079   uint distance = GetMinimalAirportDistanceToTile(it, town_tile);
02080 
02081   /* The steps for measuring noise reduction are based on the "magical" (and arbitrary) 8 base distance
02082    * adding the town_council_tolerance 4 times, as a way to graduate, depending of the tolerance.
02083    * Basically, it says that the less tolerant a town is, the bigger the distance before
02084    * an actual decrease can be granted */
02085   uint8 town_tolerance_distance = 8 + (_settings_game.difficulty.town_council_tolerance * 4);
02086 
02087   /* now, we want to have the distance segmented using the distance judged bareable by town
02088    * This will give us the coefficient of reduction the distance provides. */
02089   uint noise_reduction = distance / town_tolerance_distance;
02090 
02091   /* If the noise reduction equals the airport noise itself, don't give it for free.
02092    * Otherwise, simply reduce the airport's level. */
02093   return noise_reduction >= as->noise_level ? 1 : as->noise_level - noise_reduction;
02094 }
02095 
02103 Town *AirportGetNearestTown(const AirportSpec *as, const TileIterator &it)
02104 {
02105   Town *t, *nearest = NULL;
02106   uint add = as->size_x + as->size_y - 2; // GetMinimalAirportDistanceToTile can differ from DistanceManhattan by this much
02107   uint mindist = UINT_MAX - add; // prevent overflow
02108   FOR_ALL_TOWNS(t) {
02109     if (DistanceManhattan(t->xy, it) < mindist + add) { // avoid calling GetMinimalAirportDistanceToTile too often
02110       TileIterator *copy = it.Clone();
02111       uint dist = GetMinimalAirportDistanceToTile(*copy, t->xy);
02112       delete copy;
02113       if (dist < mindist) {
02114         nearest = t;
02115         mindist = dist;
02116       }
02117     }
02118   }
02119 
02120   return nearest;
02121 }
02122 
02123 
02125 void UpdateAirportsNoise()
02126 {
02127   Town *t;
02128   const Station *st;
02129 
02130   FOR_ALL_TOWNS(t) t->noise_reached = 0;
02131 
02132   FOR_ALL_STATIONS(st) {
02133     if (st->airport.tile != INVALID_TILE && st->airport.type != AT_OILRIG) {
02134       const AirportSpec *as = st->airport.GetSpec();
02135       AirportTileIterator it(st);
02136       Town *nearest = AirportGetNearestTown(as, it);
02137       nearest->noise_reached += GetAirportNoiseLevelForTown(as, it, nearest->xy);
02138     }
02139   }
02140 }
02141 
02155 CommandCost CmdBuildAirport(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
02156 {
02157   StationID station_to_join = GB(p2, 16, 16);
02158   bool reuse = (station_to_join != NEW_STATION);
02159   if (!reuse) station_to_join = INVALID_STATION;
02160   bool distant_join = (station_to_join != INVALID_STATION);
02161   byte airport_type = GB(p1, 0, 8);
02162   byte layout = GB(p1, 8, 8);
02163 
02164   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
02165 
02166   if (airport_type >= NUM_AIRPORTS) return CMD_ERROR;
02167 
02168   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile, flags);
02169   if (ret.Failed()) return ret;
02170 
02171   /* Check if a valid, buildable airport was chosen for construction */
02172   const AirportSpec *as = AirportSpec::Get(airport_type);
02173   if (!as->IsAvailable() || layout >= as->num_table) return CMD_ERROR;
02174 
02175   Direction rotation = as->rotation[layout];
02176   int w = as->size_x;
02177   int h = as->size_y;
02178   if (rotation == DIR_E || rotation == DIR_W) Swap(w, h);
02179   TileArea airport_area = TileArea(tile, w, h);
02180 
02181   if (w > _settings_game.station.station_spread || h > _settings_game.station.station_spread) {
02182     return_cmd_error(STR_ERROR_STATION_TOO_SPREAD_OUT);
02183   }
02184 
02185   CommandCost cost = CheckFlatLand(airport_area, flags);
02186   if (cost.Failed()) return cost;
02187 
02188   /* The noise level is the noise from the airport and reduce it to account for the distance to the town center. */
02189   AirportTileTableIterator iter(as->table[layout], tile);
02190   Town *nearest = AirportGetNearestTown(as, iter);
02191   uint newnoise_level = GetAirportNoiseLevelForTown(as, iter, nearest->xy);
02192 
02193   /* Check if local auth would allow a new airport */
02194   StringID authority_refuse_message = STR_NULL;
02195   Town *authority_refuse_town = NULL;
02196 
02197   if (_settings_game.economy.station_noise_level) {
02198     /* do not allow to build a new airport if this raise the town noise over the maximum allowed by town */
02199     if ((nearest->noise_reached + newnoise_level) > nearest->MaxTownNoise()) {
02200       authority_refuse_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_NOISE;
02201       authority_refuse_town = nearest;
02202     }
02203   } else {
02204     Town *t = ClosestTownFromTile(tile, UINT_MAX);
02205     uint num = 0;
02206     const Station *st;
02207     FOR_ALL_STATIONS(st) {
02208       if (st->town == t && (st->facilities & FACIL_AIRPORT) && st->airport.type != AT_OILRIG) num++;
02209     }
02210     if (num >= 2) {
02211       authority_refuse_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_AIRPORT;
02212       authority_refuse_town = t;
02213     }
02214   }
02215 
02216   if (authority_refuse_message != STR_NULL) {
02217     SetDParam(0, authority_refuse_town->index);
02218     return_cmd_error(authority_refuse_message);
02219   }
02220 
02221   Station *st = NULL;
02222   ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p2, 0), airport_area, &st);
02223   if (ret.Failed()) return ret;
02224 
02225   /* Distant join */
02226   if (st == NULL && distant_join) st = Station::GetIfValid(station_to_join);
02227 
02228   ret = BuildStationPart(&st, flags, reuse, airport_area, (GetAirport(airport_type)->flags & AirportFTAClass::AIRPLANES) ? STATIONNAMING_AIRPORT : STATIONNAMING_HELIPORT);
02229   if (ret.Failed()) return ret;
02230 
02231   if (st != NULL && st->airport.tile != INVALID_TILE) {
02232     return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_AIRPORT);
02233   }
02234 
02235   for (AirportTileTableIterator iter(as->table[layout], tile); iter != INVALID_TILE; ++iter) {
02236     cost.AddCost(_price[PR_BUILD_STATION_AIRPORT]);
02237   }
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     for (AirportTileTableIterator iter(as->table[layout], tile); iter != INVALID_TILE; ++iter) {
02252       MakeAirport(iter, st->owner, st->index, iter.GetStationGfx(), WATER_CLASS_INVALID);
02253       SetStationTileRandomBits(iter, GB(Random(), 0, 4));
02254       st->airport.Add(iter);
02255 
02256       if (AirportTileSpec::Get(GetTranslatedAirportTileID(iter.GetStationGfx()))->animation.status != ANIM_STATUS_NO_ANIMATION) AddAnimatedTile(iter);
02257     }
02258 
02259     /* Only call the animation trigger after all tiles have been built */
02260     for (AirportTileTableIterator iter(as->table[layout], tile); iter != INVALID_TILE; ++iter) {
02261       AirportTileAnimationTrigger(st, iter, AAT_BUILT);
02262     }
02263 
02264     UpdateAirplanesOnNewStation(st);
02265 
02266     Company::Get(st->owner)->infrastructure.airport++;
02267     DirtyCompanyInfrastructureWindows(st->owner);
02268 
02269     st->UpdateVirtCoord();
02270     UpdateStationAcceptance(st, false);
02271     st->RecomputeIndustriesNear();
02272     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
02273     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
02274     InvalidateWindowData(WC_STATION_VIEW, st->index);
02275 
02276     if (_settings_game.economy.station_noise_level) {
02277       SetWindowDirty(WC_TOWN_VIEW, st->town->index);
02278     }
02279   }
02280 
02281   return cost;
02282 }
02283 
02290 static CommandCost RemoveAirport(TileIndex tile, DoCommandFlag flags)
02291 {
02292   Station *st = Station::GetByTile(tile);
02293 
02294   if (_current_company != OWNER_WATER) {
02295     CommandCost ret = CheckOwnership(st->owner);
02296     if (ret.Failed()) return ret;
02297   }
02298 
02299   tile = st->airport.tile;
02300 
02301   CommandCost cost(EXPENSES_CONSTRUCTION);
02302 
02303   const Aircraft *a;
02304   FOR_ALL_AIRCRAFT(a) {
02305     if (!a->IsNormalAircraft()) continue;
02306     if (a->targetairport == st->index && a->state != FLYING) return CMD_ERROR;
02307   }
02308 
02309   if (flags & DC_EXEC) {
02310     const AirportSpec *as = st->airport.GetSpec();
02311     /* The noise level is the noise from the airport and reduce it to account for the distance to the town center.
02312      * And as for construction, always remove it, even if the setting is not set, in order to avoid the
02313      * need of recalculation */
02314     AirportTileIterator it(st);
02315     Town *nearest = AirportGetNearestTown(as, it);
02316     nearest->noise_reached -= GetAirportNoiseLevelForTown(as, it, nearest->xy);
02317   }
02318 
02319   TILE_AREA_LOOP(tile_cur, st->airport) {
02320     if (!st->TileBelongsToAirport(tile_cur)) continue;
02321 
02322     CommandCost ret = EnsureNoVehicleOnGround(tile_cur);
02323     if (ret.Failed()) return ret;
02324 
02325     cost.AddCost(_price[PR_CLEAR_STATION_AIRPORT]);
02326 
02327     if (flags & DC_EXEC) {
02328       if (IsHangarTile(tile_cur)) OrderBackup::Reset(tile_cur, false);
02329       DeleteAnimatedTile(tile_cur);
02330       DoClearSquare(tile_cur);
02331       DeleteNewGRFInspectWindow(GSF_AIRPORTTILES, tile_cur);
02332     }
02333   }
02334 
02335   if (flags & DC_EXEC) {
02336     /* Clear the persistent storage. */
02337     delete st->airport.psa;
02338 
02339     for (uint i = 0; i < st->airport.GetNumHangars(); ++i) {
02340       DeleteWindowById(
02341         WC_VEHICLE_DEPOT, st->airport.GetHangarTile(i)
02342       );
02343     }
02344 
02345     st->rect.AfterRemoveRect(st, st->airport);
02346 
02347     st->airport.Clear();
02348     st->facilities &= ~FACIL_AIRPORT;
02349 
02350     InvalidateWindowData(WC_STATION_VIEW, st->index);
02351 
02352     if (_settings_game.economy.station_noise_level) {
02353       SetWindowDirty(WC_TOWN_VIEW, st->town->index);
02354     }
02355 
02356     Company::Get(st->owner)->infrastructure.airport--;
02357     DirtyCompanyInfrastructureWindows(st->owner);
02358 
02359     st->UpdateVirtCoord();
02360     st->RecomputeIndustriesNear();
02361     DeleteStationIfEmpty(st);
02362     DeleteNewGRFInspectWindow(GSF_AIRPORTS, st->index);
02363   }
02364 
02365   return cost;
02366 }
02367 
02377 CommandCost CmdOpenCloseAirport(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
02378 {
02379   if (!Station::IsValidID(p1)) return CMD_ERROR;
02380   Station *st = Station::Get(p1);
02381 
02382   if (!(st->facilities & FACIL_AIRPORT) || st->owner == OWNER_NONE) return CMD_ERROR;
02383 
02384   CommandCost ret = CheckOwnership(st->owner);
02385   if (ret.Failed()) return ret;
02386 
02387   if (flags & DC_EXEC) {
02388     st->airport.flags ^= AIRPORT_CLOSED_block;
02389     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_CLOSE_AIRPORT);
02390   }
02391   return CommandCost();
02392 }
02393 
02400 bool HasStationInUse(StationID station, bool include_company, CompanyID company)
02401 {
02402   const Vehicle *v;
02403   FOR_ALL_VEHICLES(v) {
02404     if ((v->owner == company) == include_company) {
02405       const Order *order;
02406       FOR_VEHICLE_ORDERS(v, order) {
02407         if ((order->IsType(OT_GOTO_STATION) || order->IsType(OT_GOTO_WAYPOINT)) && order->GetDestination() == station) {
02408           return true;
02409         }
02410       }
02411     }
02412   }
02413   return false;
02414 }
02415 
02416 static const TileIndexDiffC _dock_tileoffs_chkaround[] = {
02417   {-1,  0},
02418   { 0,  0},
02419   { 0,  0},
02420   { 0, -1}
02421 };
02422 static const byte _dock_w_chk[4] = { 2, 1, 2, 1 };
02423 static const byte _dock_h_chk[4] = { 1, 2, 1, 2 };
02424 
02434 CommandCost CmdBuildDock(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
02435 {
02436   StationID station_to_join = GB(p2, 16, 16);
02437   bool reuse = (station_to_join != NEW_STATION);
02438   if (!reuse) station_to_join = INVALID_STATION;
02439   bool distant_join = (station_to_join != INVALID_STATION);
02440 
02441   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
02442 
02443   DiagDirection direction = GetInclinedSlopeDirection(GetTileSlope(tile));
02444   if (direction == INVALID_DIAGDIR) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02445   direction = ReverseDiagDir(direction);
02446 
02447   /* Docks cannot be placed on rapids */
02448   if (HasTileWaterGround(tile)) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02449 
02450   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile, flags);
02451   if (ret.Failed()) return ret;
02452 
02453   if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
02454 
02455   ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
02456   if (ret.Failed()) return ret;
02457 
02458   TileIndex tile_cur = tile + TileOffsByDiagDir(direction);
02459 
02460   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur) != SLOPE_FLAT) {
02461     return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02462   }
02463 
02464   if (MayHaveBridgeAbove(tile_cur) && IsBridgeAbove(tile_cur)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
02465 
02466   /* Get the water class of the water tile before it is cleared.*/
02467   WaterClass wc = GetWaterClass(tile_cur);
02468 
02469   ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
02470   if (ret.Failed()) return ret;
02471 
02472   tile_cur += TileOffsByDiagDir(direction);
02473   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur) != SLOPE_FLAT) {
02474     return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02475   }
02476 
02477   TileArea dock_area = TileArea(tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
02478       _dock_w_chk[direction], _dock_h_chk[direction]);
02479 
02480   /* middle */
02481   Station *st = NULL;
02482   ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p1, 0), dock_area, &st);
02483   if (ret.Failed()) return ret;
02484 
02485   /* Distant join */
02486   if (st == NULL && distant_join) st = Station::GetIfValid(station_to_join);
02487 
02488   ret = BuildStationPart(&st, flags, reuse, dock_area, STATIONNAMING_DOCK);
02489   if (ret.Failed()) return ret;
02490 
02491   if (st != NULL && st->dock_tile != INVALID_TILE) return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_DOCK);
02492 
02493   if (flags & DC_EXEC) {
02494     st->dock_tile = tile;
02495     st->AddFacility(FACIL_DOCK, tile);
02496 
02497     st->rect.BeforeAddRect(dock_area.tile, dock_area.w, dock_area.h, StationRect::ADD_TRY);
02498 
02499     /* If the water part of the dock is on a canal, update infrastructure counts.
02500      * This is needed as we've unconditionally cleared that tile before. */
02501     if (wc == WATER_CLASS_CANAL) {
02502       Company::Get(st->owner)->infrastructure.water++;
02503     }
02504     Company::Get(st->owner)->infrastructure.station += 2;
02505     DirtyCompanyInfrastructureWindows(st->owner);
02506 
02507     MakeDock(tile, st->owner, st->index, direction, wc);
02508 
02509     st->UpdateVirtCoord();
02510     UpdateStationAcceptance(st, false);
02511     st->RecomputeIndustriesNear();
02512     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
02513     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
02514     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_SHIPS);
02515   }
02516 
02517   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_STATION_DOCK]);
02518 }
02519 
02526 static CommandCost RemoveDock(TileIndex tile, DoCommandFlag flags)
02527 {
02528   Station *st = Station::GetByTile(tile);
02529   CommandCost ret = CheckOwnership(st->owner);
02530   if (ret.Failed()) return ret;
02531 
02532   TileIndex docking_location = TILE_ADD(st->dock_tile, ToTileIndexDiff(GetDockOffset(st->dock_tile)));
02533 
02534   TileIndex tile1 = st->dock_tile;
02535   TileIndex tile2 = tile1 + TileOffsByDiagDir(GetDockDirection(tile1));
02536 
02537   ret = EnsureNoVehicleOnGround(tile1);
02538   if (ret.Succeeded()) ret = EnsureNoVehicleOnGround(tile2);
02539   if (ret.Failed()) return ret;
02540 
02541   if (flags & DC_EXEC) {
02542     DoClearSquare(tile1);
02543     MarkTileDirtyByTile(tile1);
02544     MakeWaterKeepingClass(tile2, st->owner);
02545 
02546     st->rect.AfterRemoveTile(st, tile1);
02547     st->rect.AfterRemoveTile(st, tile2);
02548 
02549     st->dock_tile = INVALID_TILE;
02550     st->facilities &= ~FACIL_DOCK;
02551 
02552     Company::Get(st->owner)->infrastructure.station -= 2;
02553     DirtyCompanyInfrastructureWindows(st->owner);
02554 
02555     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_SHIPS);
02556     st->UpdateVirtCoord();
02557     st->RecomputeIndustriesNear();
02558     DeleteStationIfEmpty(st);
02559 
02560     /* All ships that were going to our station, can't go to it anymore.
02561      * Just clear the order, then automatically the next appropriate order
02562      * will be selected and in case of no appropriate order it will just
02563      * wander around the world. */
02564     Ship *s;
02565     FOR_ALL_SHIPS(s) {
02566       if (s->current_order.IsType(OT_LOADING) && s->tile == docking_location) {
02567         s->LeaveStation();
02568       }
02569 
02570       if (s->dest_tile == docking_location) {
02571         s->dest_tile = 0;
02572         s->current_order.Free();
02573       }
02574     }
02575   }
02576 
02577   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_STATION_DOCK]);
02578 }
02579 
02580 #include "table/station_land.h"
02581 
02582 const DrawTileSprites *GetStationTileLayout(StationType st, byte gfx)
02583 {
02584   return &_station_display_datas[st][gfx];
02585 }
02586 
02596 bool SplitGroundSpriteForOverlay(const TileInfo *ti, SpriteID *ground, RailTrackOffset *overlay_offset)
02597 {
02598   bool snow_desert;
02599   switch (*ground) {
02600     case SPR_RAIL_TRACK_X:
02601       snow_desert = false;
02602       *overlay_offset = RTO_X;
02603       break;
02604 
02605     case SPR_RAIL_TRACK_Y:
02606       snow_desert = false;
02607       *overlay_offset = RTO_Y;
02608       break;
02609 
02610     case SPR_RAIL_TRACK_X_SNOW:
02611       snow_desert = true;
02612       *overlay_offset = RTO_X;
02613       break;
02614 
02615     case SPR_RAIL_TRACK_Y_SNOW:
02616       snow_desert = true;
02617       *overlay_offset = RTO_Y;
02618       break;
02619 
02620     default:
02621       return false;
02622   }
02623 
02624   if (ti != NULL) {
02625     /* Decide snow/desert from tile */
02626     switch (_settings_game.game_creation.landscape) {
02627       case LT_ARCTIC:
02628         snow_desert = (uint)ti->z > GetSnowLine() * TILE_HEIGHT;
02629         break;
02630 
02631       case LT_TROPIC:
02632         snow_desert = GetTropicZone(ti->tile) == TROPICZONE_DESERT;
02633         break;
02634 
02635       default:
02636         break;
02637     }
02638   }
02639 
02640   *ground = snow_desert ? SPR_FLAT_SNOW_DESERT_TILE : SPR_FLAT_GRASS_TILE;
02641   return true;
02642 }
02643 
02644 static void DrawTile_Station(TileInfo *ti)
02645 {
02646   const NewGRFSpriteLayout *layout = NULL;
02647   DrawTileSprites tmp_rail_layout;
02648   const DrawTileSprites *t = NULL;
02649   RoadTypes roadtypes;
02650   int32 total_offset;
02651   const RailtypeInfo *rti = NULL;
02652   uint32 relocation = 0;
02653   uint32 ground_relocation = 0;
02654   BaseStation *st = NULL;
02655   const StationSpec *statspec = NULL;
02656   uint tile_layout = 0;
02657 
02658   if (HasStationRail(ti->tile)) {
02659     rti = GetRailTypeInfo(GetRailType(ti->tile));
02660     roadtypes = ROADTYPES_NONE;
02661     total_offset = rti->GetRailtypeSpriteOffset();
02662 
02663     if (IsCustomStationSpecIndex(ti->tile)) {
02664       /* look for customization */
02665       st = BaseStation::GetByTile(ti->tile);
02666       statspec = st->speclist[GetCustomStationSpecIndex(ti->tile)].spec;
02667 
02668       if (statspec != NULL) {
02669         tile_layout = GetStationGfx(ti->tile);
02670 
02671         if (HasBit(statspec->callback_mask, CBM_STATION_SPRITE_LAYOUT)) {
02672           uint16 callback = GetStationCallback(CBID_STATION_SPRITE_LAYOUT, 0, 0, statspec, st, ti->tile);
02673           if (callback != CALLBACK_FAILED) tile_layout = (callback & ~1) + GetRailStationAxis(ti->tile);
02674         }
02675 
02676         /* Ensure the chosen tile layout is valid for this custom station */
02677         if (statspec->renderdata != NULL) {
02678           layout = &statspec->renderdata[tile_layout < statspec->tiles ? tile_layout : (uint)GetRailStationAxis(ti->tile)];
02679           if (!layout->NeedsPreprocessing()) {
02680             t = layout;
02681             layout = NULL;
02682           }
02683         }
02684       }
02685     }
02686   } else {
02687     roadtypes = IsRoadStop(ti->tile) ? GetRoadTypes(ti->tile) : ROADTYPES_NONE;
02688     total_offset = 0;
02689   }
02690 
02691   StationGfx gfx = GetStationGfx(ti->tile);
02692   if (IsAirport(ti->tile)) {
02693     gfx = GetAirportGfx(ti->tile);
02694     if (gfx >= NEW_AIRPORTTILE_OFFSET) {
02695       const AirportTileSpec *ats = AirportTileSpec::Get(gfx);
02696       if (ats->grf_prop.spritegroup[0] != NULL && DrawNewAirportTile(ti, Station::GetByTile(ti->tile), gfx, ats)) {
02697         return;
02698       }
02699       /* No sprite group (or no valid one) found, meaning no graphics associated.
02700        * Use the substitute one instead */
02701       assert(ats->grf_prop.subst_id != INVALID_AIRPORTTILE);
02702       gfx = ats->grf_prop.subst_id;
02703     }
02704     switch (gfx) {
02705       case APT_RADAR_GRASS_FENCE_SW:
02706         t = &_station_display_datas_airport_radar_grass_fence_sw[GetAnimationFrame(ti->tile)];
02707         break;
02708       case APT_GRASS_FENCE_NE_FLAG:
02709         t = &_station_display_datas_airport_flag_grass_fence_ne[GetAnimationFrame(ti->tile)];
02710         break;
02711       case APT_RADAR_FENCE_SW:
02712         t = &_station_display_datas_airport_radar_fence_sw[GetAnimationFrame(ti->tile)];
02713         break;
02714       case APT_RADAR_FENCE_NE:
02715         t = &_station_display_datas_airport_radar_fence_ne[GetAnimationFrame(ti->tile)];
02716         break;
02717       case APT_GRASS_FENCE_NE_FLAG_2:
02718         t = &_station_display_datas_airport_flag_grass_fence_ne_2[GetAnimationFrame(ti->tile)];
02719         break;
02720     }
02721   }
02722 
02723   Owner owner = GetTileOwner(ti->tile);
02724 
02725   PaletteID palette;
02726   if (Company::IsValidID(owner)) {
02727     palette = COMPANY_SPRITE_COLOUR(owner);
02728   } else {
02729     /* Some stations are not owner by a company, namely oil rigs */
02730     palette = PALETTE_TO_GREY;
02731   }
02732 
02733   if (layout == NULL && (t == NULL || t->seq == NULL)) t = GetStationTileLayout(GetStationType(ti->tile), gfx);
02734 
02735   /* don't show foundation for docks */
02736   if (ti->tileh != SLOPE_FLAT && !IsDock(ti->tile)) {
02737     if (statspec != NULL && HasBit(statspec->flags, SSF_CUSTOM_FOUNDATIONS)) {
02738       /* Station has custom foundations.
02739        * Check whether the foundation continues beyond the tile's upper sides. */
02740       uint edge_info = 0;
02741       int z;
02742       Slope slope = GetFoundationPixelSlope(ti->tile, &z);
02743       if (!HasFoundationNW(ti->tile, slope, z)) SetBit(edge_info, 0);
02744       if (!HasFoundationNE(ti->tile, slope, z)) SetBit(edge_info, 1);
02745       SpriteID image = GetCustomStationFoundationRelocation(statspec, st, ti->tile, tile_layout, edge_info);
02746       if (image == 0) goto draw_default_foundation;
02747 
02748       if (HasBit(statspec->flags, SSF_EXTENDED_FOUNDATIONS)) {
02749         /* Station provides extended foundations. */
02750 
02751         static const uint8 foundation_parts[] = {
02752           0, 0, 0, 0, // Invalid,  Invalid,   Invalid,   SLOPE_SW
02753           0, 1, 2, 3, // Invalid,  SLOPE_EW,  SLOPE_SE,  SLOPE_WSE
02754           0, 4, 5, 6, // Invalid,  SLOPE_NW,  SLOPE_NS,  SLOPE_NWS
02755           7, 8, 9     // SLOPE_NE, SLOPE_ENW, SLOPE_SEN
02756         };
02757 
02758         AddSortableSpriteToDraw(image + foundation_parts[ti->tileh], PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
02759       } else {
02760         /* Draw simple foundations, built up from 8 possible foundation sprites. */
02761 
02762         /* Each set bit represents one of the eight composite sprites to be drawn.
02763          * 'Invalid' entries will not drawn but are included for completeness. */
02764         static const uint8 composite_foundation_parts[] = {
02765           /* Invalid  (00000000), Invalid   (11010001), Invalid   (11100100), SLOPE_SW  (11100000) */
02766              0x00,                0xD1,                 0xE4,                 0xE0,
02767           /* Invalid  (11001010), SLOPE_EW  (11001001), SLOPE_SE  (11000100), SLOPE_WSE (11000000) */
02768              0xCA,                0xC9,                 0xC4,                 0xC0,
02769           /* Invalid  (11010010), SLOPE_NW  (10010001), SLOPE_NS  (11100100), SLOPE_NWS (10100000) */
02770              0xD2,                0x91,                 0xE4,                 0xA0,
02771           /* SLOPE_NE (01001010), SLOPE_ENW (00001001), SLOPE_SEN (01000100) */
02772              0x4A,                0x09,                 0x44
02773         };
02774 
02775         uint8 parts = composite_foundation_parts[ti->tileh];
02776 
02777         /* If foundations continue beyond the tile's upper sides then
02778          * mask out the last two pieces. */
02779         if (HasBit(edge_info, 0)) ClrBit(parts, 6);
02780         if (HasBit(edge_info, 1)) ClrBit(parts, 7);
02781 
02782         if (parts == 0) {
02783           /* We always have to draw at least one sprite to make sure there is a boundingbox and a sprite with the
02784            * correct offset for the childsprites.
02785            * So, draw the (completely empty) sprite of the default foundations. */
02786           goto draw_default_foundation;
02787         }
02788 
02789         StartSpriteCombine();
02790         for (int i = 0; i < 8; i++) {
02791           if (HasBit(parts, i)) {
02792             AddSortableSpriteToDraw(image + i, PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
02793           }
02794         }
02795         EndSpriteCombine();
02796       }
02797 
02798       OffsetGroundSprite(31, 1);
02799       ti->z += ApplyPixelFoundationToSlope(FOUNDATION_LEVELED, &ti->tileh);
02800     } else {
02801 draw_default_foundation:
02802       DrawFoundation(ti, FOUNDATION_LEVELED);
02803     }
02804   }
02805 
02806   if (IsBuoy(ti->tile)) {
02807     DrawWaterClassGround(ti);
02808     SpriteID sprite = GetCanalSprite(CF_BUOY, ti->tile);
02809     if (sprite != 0) total_offset = sprite - SPR_IMG_BUOY;
02810   } else if (IsDock(ti->tile) || (IsOilRig(ti->tile) && IsTileOnWater(ti->tile))) {
02811     if (ti->tileh == SLOPE_FLAT) {
02812       DrawWaterClassGround(ti);
02813     } else {
02814       assert(IsDock(ti->tile));
02815       TileIndex water_tile = ti->tile + TileOffsByDiagDir(GetDockDirection(ti->tile));
02816       WaterClass wc = GetWaterClass(water_tile);
02817       if (wc == WATER_CLASS_SEA) {
02818         DrawShoreTile(ti->tileh);
02819       } else {
02820         DrawClearLandTile(ti, 3);
02821       }
02822     }
02823   } else {
02824     if (layout != NULL) {
02825       /* Sprite layout which needs preprocessing */
02826       bool separate_ground = HasBit(statspec->flags, SSF_SEPARATE_GROUND);
02827       uint32 var10_values = layout->PrepareLayout(total_offset, rti->fallback_railtype, 0, 0, separate_ground);
02828       uint8 var10;
02829       FOR_EACH_SET_BIT(var10, var10_values) {
02830         uint32 var10_relocation = GetCustomStationRelocation(statspec, st, ti->tile, var10);
02831         layout->ProcessRegisters(var10, var10_relocation, separate_ground);
02832       }
02833       tmp_rail_layout.seq = layout->GetLayout(&tmp_rail_layout.ground);
02834       t = &tmp_rail_layout;
02835       total_offset = 0;
02836     } else if (statspec != NULL) {
02837       /* Simple sprite layout */
02838       ground_relocation = relocation = GetCustomStationRelocation(statspec, st, ti->tile, 0);
02839       if (HasBit(statspec->flags, SSF_SEPARATE_GROUND)) {
02840         ground_relocation = GetCustomStationRelocation(statspec, st, ti->tile, 1);
02841       }
02842       ground_relocation += rti->fallback_railtype;
02843     }
02844 
02845     SpriteID image = t->ground.sprite;
02846     PaletteID pal  = t->ground.pal;
02847     RailTrackOffset overlay_offset;
02848     if (rti != NULL && rti->UsesOverlay() && SplitGroundSpriteForOverlay(ti, &image, &overlay_offset)) {
02849       SpriteID ground = GetCustomRailSprite(rti, ti->tile, RTSG_GROUND);
02850       DrawGroundSprite(image, PAL_NONE);
02851       DrawGroundSprite(ground + overlay_offset, PAL_NONE);
02852 
02853       if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasStationReservation(ti->tile)) {
02854         SpriteID overlay = GetCustomRailSprite(rti, ti->tile, RTSG_OVERLAY);
02855         DrawGroundSprite(overlay + overlay_offset, PALETTE_CRASH);
02856       }
02857     } else {
02858       image += HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE) ? ground_relocation : total_offset;
02859       if (HasBit(pal, SPRITE_MODIFIER_CUSTOM_SPRITE)) pal += ground_relocation;
02860       DrawGroundSprite(image, GroundSpritePaletteTransform(image, pal, palette));
02861 
02862       /* PBS debugging, draw reserved tracks darker */
02863       if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasStationRail(ti->tile) && HasStationReservation(ti->tile)) {
02864         const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
02865         DrawGroundSprite(GetRailStationAxis(ti->tile) == AXIS_X ? rti->base_sprites.single_x : rti->base_sprites.single_y, PALETTE_CRASH);
02866       }
02867     }
02868   }
02869 
02870   if (HasStationRail(ti->tile) && HasCatenaryDrawn(GetRailType(ti->tile))) DrawCatenary(ti);
02871 
02872   if (HasBit(roadtypes, ROADTYPE_TRAM)) {
02873     Axis axis = GetRoadStopDir(ti->tile) == DIAGDIR_NE ? AXIS_X : AXIS_Y;
02874     DrawGroundSprite((HasBit(roadtypes, ROADTYPE_ROAD) ? SPR_TRAMWAY_OVERLAY : SPR_TRAMWAY_TRAM) + (axis ^ 1), PAL_NONE);
02875     DrawTramCatenary(ti, axis == AXIS_X ? ROAD_X : ROAD_Y);
02876   }
02877 
02878   if (IsRailWaypoint(ti->tile)) {
02879     /* Don't offset the waypoint graphics; they're always the same. */
02880     total_offset = 0;
02881   }
02882 
02883   DrawRailTileSeq(ti, t, TO_BUILDINGS, total_offset, relocation, palette);
02884 }
02885 
02886 void StationPickerDrawSprite(int x, int y, StationType st, RailType railtype, RoadType roadtype, int image)
02887 {
02888   int32 total_offset = 0;
02889   PaletteID pal = COMPANY_SPRITE_COLOUR(_local_company);
02890   const DrawTileSprites *t = GetStationTileLayout(st, image);
02891   const RailtypeInfo *rti = NULL;
02892 
02893   if (railtype != INVALID_RAILTYPE) {
02894     rti = GetRailTypeInfo(railtype);
02895     total_offset = rti->GetRailtypeSpriteOffset();
02896   }
02897 
02898   SpriteID img = t->ground.sprite;
02899   RailTrackOffset overlay_offset;
02900   if (rti != NULL && rti->UsesOverlay() && SplitGroundSpriteForOverlay(NULL, &img, &overlay_offset)) {
02901     SpriteID ground = GetCustomRailSprite(rti, INVALID_TILE, RTSG_GROUND);
02902     DrawSprite(img, PAL_NONE, x, y);
02903     DrawSprite(ground + overlay_offset, PAL_NONE, x, y);
02904   } else {
02905     DrawSprite(img + total_offset, HasBit(img, PALETTE_MODIFIER_COLOUR) ? pal : PAL_NONE, x, y);
02906   }
02907 
02908   if (roadtype == ROADTYPE_TRAM) {
02909     DrawSprite(SPR_TRAMWAY_TRAM + (t->ground.sprite == SPR_ROAD_PAVED_STRAIGHT_X ? 1 : 0), PAL_NONE, x, y);
02910   }
02911 
02912   /* Default waypoint has no railtype specific sprites */
02913   DrawRailTileSeqInGUI(x, y, t, st == STATION_WAYPOINT ? 0 : total_offset, 0, pal);
02914 }
02915 
02916 static int GetSlopePixelZ_Station(TileIndex tile, uint x, uint y)
02917 {
02918   return GetTileMaxPixelZ(tile);
02919 }
02920 
02921 static Foundation GetFoundation_Station(TileIndex tile, Slope tileh)
02922 {
02923   return FlatteningFoundation(tileh);
02924 }
02925 
02926 static void GetTileDesc_Station(TileIndex tile, TileDesc *td)
02927 {
02928   td->owner[0] = GetTileOwner(tile);
02929   if (IsDriveThroughStopTile(tile)) {
02930     Owner road_owner = INVALID_OWNER;
02931     Owner tram_owner = INVALID_OWNER;
02932     RoadTypes rts = GetRoadTypes(tile);
02933     if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
02934     if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
02935 
02936     /* Is there a mix of owners? */
02937     if ((tram_owner != INVALID_OWNER && tram_owner != td->owner[0]) ||
02938         (road_owner != INVALID_OWNER && road_owner != td->owner[0])) {
02939       uint i = 1;
02940       if (road_owner != INVALID_OWNER) {
02941         td->owner_type[i] = STR_LAND_AREA_INFORMATION_ROAD_OWNER;
02942         td->owner[i] = road_owner;
02943         i++;
02944       }
02945       if (tram_owner != INVALID_OWNER) {
02946         td->owner_type[i] = STR_LAND_AREA_INFORMATION_TRAM_OWNER;
02947         td->owner[i] = tram_owner;
02948       }
02949     }
02950   }
02951   td->build_date = BaseStation::GetByTile(tile)->build_date;
02952 
02953   if (HasStationTileRail(tile)) {
02954     const StationSpec *spec = GetStationSpec(tile);
02955 
02956     if (spec != NULL) {
02957       td->station_class = StationClass::Get(spec->cls_id)->name;
02958       td->station_name  = spec->name;
02959 
02960       if (spec->grf_prop.grffile != NULL) {
02961         const GRFConfig *gc = GetGRFConfig(spec->grf_prop.grffile->grfid);
02962         td->grf = gc->GetName();
02963       }
02964     }
02965 
02966     const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(tile));
02967     td->rail_speed = rti->max_speed;
02968   }
02969 
02970   if (IsAirport(tile)) {
02971     const AirportSpec *as = Station::GetByTile(tile)->airport.GetSpec();
02972     td->airport_class = AirportClass::Get(as->cls_id)->name;
02973     td->airport_name = as->name;
02974 
02975     const AirportTileSpec *ats = AirportTileSpec::GetByTile(tile);
02976     td->airport_tile_name = ats->name;
02977 
02978     if (as->grf_prop.grffile != NULL) {
02979       const GRFConfig *gc = GetGRFConfig(as->grf_prop.grffile->grfid);
02980       td->grf = gc->GetName();
02981     } else if (ats->grf_prop.grffile != NULL) {
02982       const GRFConfig *gc = GetGRFConfig(ats->grf_prop.grffile->grfid);
02983       td->grf = gc->GetName();
02984     }
02985   }
02986 
02987   StringID str;
02988   switch (GetStationType(tile)) {
02989     default: NOT_REACHED();
02990     case STATION_RAIL:     str = STR_LAI_STATION_DESCRIPTION_RAILROAD_STATION; break;
02991     case STATION_AIRPORT:
02992       str = (IsHangar(tile) ? STR_LAI_STATION_DESCRIPTION_AIRCRAFT_HANGAR : STR_LAI_STATION_DESCRIPTION_AIRPORT);
02993       break;
02994     case STATION_TRUCK:    str = STR_LAI_STATION_DESCRIPTION_TRUCK_LOADING_AREA; break;
02995     case STATION_BUS:      str = STR_LAI_STATION_DESCRIPTION_BUS_STATION; break;
02996     case STATION_OILRIG:   str = STR_INDUSTRY_NAME_OIL_RIG; break;
02997     case STATION_DOCK:     str = STR_LAI_STATION_DESCRIPTION_SHIP_DOCK; break;
02998     case STATION_BUOY:     str = STR_LAI_STATION_DESCRIPTION_BUOY; break;
02999     case STATION_WAYPOINT: str = STR_LAI_STATION_DESCRIPTION_WAYPOINT; break;
03000   }
03001   td->str = str;
03002 }
03003 
03004 
03005 static TrackStatus GetTileTrackStatus_Station(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
03006 {
03007   TrackBits trackbits = TRACK_BIT_NONE;
03008 
03009   switch (mode) {
03010     case TRANSPORT_RAIL:
03011       if (HasStationRail(tile) && !IsStationTileBlocked(tile)) {
03012         trackbits = TrackToTrackBits(GetRailStationTrack(tile));
03013       }
03014       break;
03015 
03016     case TRANSPORT_WATER:
03017       /* buoy is coded as a station, it is always on open water */
03018       if (IsBuoy(tile)) {
03019         trackbits = TRACK_BIT_ALL;
03020         /* remove tracks that connect NE map edge */
03021         if (TileX(tile) == 0) trackbits &= ~(TRACK_BIT_X | TRACK_BIT_UPPER | TRACK_BIT_RIGHT);
03022         /* remove tracks that connect NW map edge */
03023         if (TileY(tile) == 0) trackbits &= ~(TRACK_BIT_Y | TRACK_BIT_LEFT | TRACK_BIT_UPPER);
03024       }
03025       break;
03026 
03027     case TRANSPORT_ROAD:
03028       if ((GetRoadTypes(tile) & sub_mode) != 0 && IsRoadStop(tile)) {
03029         DiagDirection dir = GetRoadStopDir(tile);
03030         Axis axis = DiagDirToAxis(dir);
03031 
03032         if (side != INVALID_DIAGDIR) {
03033           if (axis != DiagDirToAxis(side) || (IsStandardRoadStopTile(tile) && dir != side)) break;
03034         }
03035 
03036         trackbits = AxisToTrackBits(axis);
03037       }
03038       break;
03039 
03040     default:
03041       break;
03042   }
03043 
03044   return CombineTrackStatus(TrackBitsToTrackdirBits(trackbits), TRACKDIR_BIT_NONE);
03045 }
03046 
03047 
03048 static void TileLoop_Station(TileIndex tile)
03049 {
03050   /* FIXME -- GetTileTrackStatus_Station -> animated stationtiles
03051    * hardcoded.....not good */
03052   switch (GetStationType(tile)) {
03053     case STATION_AIRPORT:
03054       AirportTileAnimationTrigger(Station::GetByTile(tile), tile, AAT_TILELOOP);
03055       break;
03056 
03057     case STATION_DOCK:
03058       if (GetTileSlope(tile) != SLOPE_FLAT) break; // only handle water part
03059       /* FALL THROUGH */
03060     case STATION_OILRIG: //(station part)
03061     case STATION_BUOY:
03062       TileLoop_Water(tile);
03063       break;
03064 
03065     default: break;
03066   }
03067 }
03068 
03069 
03070 static void AnimateTile_Station(TileIndex tile)
03071 {
03072   if (HasStationRail(tile)) {
03073     AnimateStationTile(tile);
03074     return;
03075   }
03076 
03077   if (IsAirport(tile)) {
03078     AnimateAirportTile(tile);
03079   }
03080 }
03081 
03082 
03083 static bool ClickTile_Station(TileIndex tile)
03084 {
03085   const BaseStation *bst = BaseStation::GetByTile(tile);
03086 
03087   if (bst->facilities & FACIL_WAYPOINT) {
03088     ShowWaypointWindow(Waypoint::From(bst));
03089   } else if (IsHangar(tile)) {
03090     const Station *st = Station::From(bst);
03091     ShowDepotWindow(st->airport.GetHangarTile(st->airport.GetHangarNum(tile)), VEH_AIRCRAFT);
03092   } else {
03093     ShowStationViewWindow(bst->index);
03094   }
03095   return true;
03096 }
03097 
03098 static VehicleEnterTileStatus VehicleEnter_Station(Vehicle *v, TileIndex tile, int x, int y)
03099 {
03100   if (v->type == VEH_TRAIN) {
03101     StationID station_id = GetStationIndex(tile);
03102     if (!v->current_order.ShouldStopAtStation(v, station_id)) return VETSB_CONTINUE;
03103     if (!IsRailStation(tile) || !v->IsFrontEngine()) return VETSB_CONTINUE;
03104 
03105     int station_ahead;
03106     int station_length;
03107     int stop = GetTrainStopLocation(station_id, tile, Train::From(v), &station_ahead, &station_length);
03108 
03109     /* Stop whenever that amount of station ahead + the distance from the
03110      * begin of the platform to the stop location is longer than the length
03111      * of the platform. Station ahead 'includes' the current tile where the
03112      * vehicle is on, so we need to subtract that. */
03113     if (!IsInsideBS(stop + station_ahead, station_length, TILE_SIZE)) return VETSB_CONTINUE;
03114 
03115     DiagDirection dir = DirToDiagDir(v->direction);
03116 
03117     x &= 0xF;
03118     y &= 0xF;
03119 
03120     if (DiagDirToAxis(dir) != AXIS_X) Swap(x, y);
03121     if (y == TILE_SIZE / 2) {
03122       if (dir != DIAGDIR_SE && dir != DIAGDIR_SW) x = TILE_SIZE - 1 - x;
03123       stop &= TILE_SIZE - 1;
03124 
03125       if (x == stop) return VETSB_ENTERED_STATION | (VehicleEnterTileStatus)(station_id << VETS_STATION_ID_OFFSET); // enter station
03126       if (x < stop) {
03127         uint16 spd;
03128 
03129         v->vehstatus |= VS_TRAIN_SLOWING;
03130         spd = max(0, (stop - x) * 20 - 15);
03131         if (spd < v->cur_speed) v->cur_speed = spd;
03132       }
03133     }
03134   } else if (v->type == VEH_ROAD) {
03135     RoadVehicle *rv = RoadVehicle::From(v);
03136     if (rv->state < RVSB_IN_ROAD_STOP && !IsReversingRoadTrackdir((Trackdir)rv->state) && rv->frame == 0) {
03137       if (IsRoadStop(tile) && rv->IsFrontEngine()) {
03138         /* Attempt to allocate a parking bay in a road stop */
03139         return RoadStop::GetByTile(tile, GetRoadStopType(tile))->Enter(rv) ? VETSB_CONTINUE : VETSB_CANNOT_ENTER;
03140       }
03141     }
03142   }
03143 
03144   return VETSB_CONTINUE;
03145 }
03146 
03151 void TriggerWatchedCargoCallbacks(Station *st)
03152 {
03153   /* Collect cargoes accepted since the last big tick. */
03154   uint cargoes = 0;
03155   for (CargoID cid = 0; cid < NUM_CARGO; cid++) {
03156     if (HasBit(st->goods[cid].acceptance_pickup, GoodsEntry::GES_ACCEPTED_BIGTICK)) SetBit(cargoes, cid);
03157   }
03158 
03159   /* Anything to do? */
03160   if (cargoes == 0) return;
03161 
03162   /* Loop over all houses in the catchment. */
03163   Rect r = st->GetCatchmentRect();
03164   TileArea ta(TileXY(r.left, r.top), TileXY(r.right, r.bottom));
03165   TILE_AREA_LOOP(tile, ta) {
03166     if (IsTileType(tile, MP_HOUSE)) {
03167       WatchedCargoCallback(tile, cargoes);
03168     }
03169   }
03170 }
03171 
03178 static bool StationHandleBigTick(BaseStation *st)
03179 {
03180   if (!st->IsInUse()) {
03181     if (++st->delete_ctr >= 8) delete st;
03182     return false;
03183   }
03184 
03185   if (Station::IsExpected(st)) {
03186     TriggerWatchedCargoCallbacks(Station::From(st));
03187 
03188     for (CargoID i = 0; i < NUM_CARGO; i++) {
03189       ClrBit(Station::From(st)->goods[i].acceptance_pickup, GoodsEntry::GES_ACCEPTED_BIGTICK);
03190     }
03191   }
03192 
03193 
03194   if ((st->facilities & FACIL_WAYPOINT) == 0) UpdateStationAcceptance(Station::From(st), true);
03195 
03196   return true;
03197 }
03198 
03199 static inline void byte_inc_sat(byte *p)
03200 {
03201   byte b = *p + 1;
03202   if (b != 0) *p = b;
03203 }
03204 
03205 static void UpdateStationRating(Station *st)
03206 {
03207   bool waiting_changed = false;
03208 
03209   byte_inc_sat(&st->time_since_load);
03210   byte_inc_sat(&st->time_since_unload);
03211 
03212   const CargoSpec *cs;
03213   FOR_ALL_CARGOSPECS(cs) {
03214     GoodsEntry *ge = &st->goods[cs->Index()];
03215     /* Slowly increase the rating back to his original level in the case we
03216      *  didn't deliver cargo yet to this station. This happens when a bribe
03217      *  failed while you didn't moved that cargo yet to a station. */
03218     if (!HasBit(ge->acceptance_pickup, GoodsEntry::GES_PICKUP) && ge->rating < INITIAL_STATION_RATING) {
03219       ge->rating++;
03220     }
03221 
03222     /* Only change the rating if we are moving this cargo */
03223     if (HasBit(ge->acceptance_pickup, GoodsEntry::GES_PICKUP)) {
03224       byte_inc_sat(&ge->time_since_pickup);
03225 
03226       bool skip = false;
03227       int rating = 0;
03228       uint waiting = ge->cargo.Count();
03229 
03230       if (HasBit(cs->callback_mask, CBM_CARGO_STATION_RATING_CALC)) {
03231         /* Perform custom station rating. If it succeeds the speed, days in transit and
03232          * waiting cargo ratings must not be executed. */
03233 
03234         /* NewGRFs expect last speed to be 0xFF when no vehicle has arrived yet. */
03235         uint last_speed = ge->HasVehicleEverTriedLoading() ? ge->last_speed : 0xFF;
03236 
03237         uint32 var18 = min(ge->time_since_pickup, 0xFF) | (min(waiting, 0xFFFF) << 8) | (min(last_speed, 0xFF) << 24);
03238         /* Convert to the 'old' vehicle types */
03239         uint32 var10 = (st->last_vehicle_type == VEH_INVALID) ? 0x0 : (st->last_vehicle_type + 0x10);
03240         uint16 callback = GetCargoCallback(CBID_CARGO_STATION_RATING_CALC, var10, var18, cs);
03241         if (callback != CALLBACK_FAILED) {
03242           skip = true;
03243           rating = GB(callback, 0, 14);
03244 
03245           /* Simulate a 15 bit signed value */
03246           if (HasBit(callback, 14)) rating -= 0x4000;
03247         }
03248       }
03249 
03250       if (!skip) {
03251         int b = ge->last_speed - 85;
03252         if (b >= 0) rating += b >> 2;
03253 
03254         byte waittime = ge->time_since_pickup;
03255         if (st->last_vehicle_type == VEH_SHIP) waittime >>= 2;
03256         (waittime > 21) ||
03257         (rating += 25, waittime > 12) ||
03258         (rating += 25, waittime > 6) ||
03259         (rating += 45, waittime > 3) ||
03260         (rating += 35, true);
03261 
03262         (rating -= 90, waiting > 1500) ||
03263         (rating += 55, waiting > 1000) ||
03264         (rating += 35, waiting > 600) ||
03265         (rating += 10, waiting > 300) ||
03266         (rating += 20, waiting > 100) ||
03267         (rating += 10, true);
03268       }
03269 
03270       if (Company::IsValidID(st->owner) && HasBit(st->town->statues, st->owner)) rating += 26;
03271 
03272       byte age = ge->last_age;
03273       (age >= 3) ||
03274       (rating += 10, age >= 2) ||
03275       (rating += 10, age >= 1) ||
03276       (rating += 13, true);
03277 
03278       {
03279         int or_ = ge->rating; // old rating
03280 
03281         /* only modify rating in steps of -2, -1, 0, 1 or 2 */
03282         ge->rating = rating = or_ + Clamp(Clamp(rating, 0, 255) - or_, -2, 2);
03283 
03284         /* if rating is <= 64 and more than 200 items waiting,
03285          * remove some random amount of goods from the station */
03286         if (rating <= 64 && waiting >= 200) {
03287           int dec = Random() & 0x1F;
03288           if (waiting < 400) dec &= 7;
03289           waiting -= dec + 1;
03290           waiting_changed = true;
03291         }
03292 
03293         /* if rating is <= 127 and there are any items waiting, maybe remove some goods. */
03294         if (rating <= 127 && waiting != 0) {
03295           uint32 r = Random();
03296           if (rating <= (int)GB(r, 0, 7)) {
03297             /* Need to have int, otherwise it will just overflow etc. */
03298             waiting = max((int)waiting - (int)GB(r, 8, 2) - 1, 0);
03299             waiting_changed = true;
03300           }
03301         }
03302 
03303         /* At some point we really must cap the cargo. Previously this
03304          * was a strict 4095, but now we'll have a less strict, but
03305          * increasingly aggressive truncation of the amount of cargo. */
03306         static const uint WAITING_CARGO_THRESHOLD  = 1 << 12;
03307         static const uint WAITING_CARGO_CUT_FACTOR = 1 <<  6;
03308         static const uint MAX_WAITING_CARGO        = 1 << 15;
03309 
03310         if (waiting > WAITING_CARGO_THRESHOLD) {
03311           uint difference = waiting - WAITING_CARGO_THRESHOLD;
03312           waiting -= (difference / WAITING_CARGO_CUT_FACTOR);
03313 
03314           waiting = min(waiting, MAX_WAITING_CARGO);
03315           waiting_changed = true;
03316         }
03317 
03318         if (waiting_changed) ge->cargo.Truncate(waiting);
03319       }
03320     }
03321   }
03322 
03323   StationID index = st->index;
03324   if (waiting_changed) {
03325     SetWindowDirty(WC_STATION_VIEW, index); // update whole window
03326   } else {
03327     SetWindowWidgetDirty(WC_STATION_VIEW, index, WID_SV_ACCEPT_RATING_LIST); // update only ratings list
03328   }
03329 }
03330 
03331 /* called for every station each tick */
03332 static void StationHandleSmallTick(BaseStation *st)
03333 {
03334   if ((st->facilities & FACIL_WAYPOINT) != 0 || !st->IsInUse()) return;
03335 
03336   byte b = st->delete_ctr + 1;
03337   if (b >= STATION_RATING_TICKS) b = 0;
03338   st->delete_ctr = b;
03339 
03340   if (b == 0) UpdateStationRating(Station::From(st));
03341 }
03342 
03343 void OnTick_Station()
03344 {
03345   if (_game_mode == GM_EDITOR) return;
03346 
03347   BaseStation *st;
03348   FOR_ALL_BASE_STATIONS(st) {
03349     StationHandleSmallTick(st);
03350 
03351     /* Run STATION_ACCEPTANCE_TICKS = 250 tick interval trigger for station animation.
03352      * Station index is included so that triggers are not all done
03353      * at the same time. */
03354     if ((_tick_counter + st->index) % STATION_ACCEPTANCE_TICKS == 0) {
03355       /* Stop processing this station if it was deleted */
03356       if (!StationHandleBigTick(st)) continue;
03357       TriggerStationAnimation(st, st->xy, SAT_250_TICKS);
03358       if (Station::IsExpected(st)) AirportAnimationTrigger(Station::From(st), AAT_STATION_250_TICKS);
03359     }
03360   }
03361 }
03362 
03364 void StationMonthlyLoop()
03365 {
03366   Station *st;
03367 
03368   FOR_ALL_STATIONS(st) {
03369     for (CargoID i = 0; i < NUM_CARGO; i++) {
03370       GoodsEntry *ge = &st->goods[i];
03371       SB(ge->acceptance_pickup, GoodsEntry::GES_LAST_MONTH, 1, GB(ge->acceptance_pickup, GoodsEntry::GES_CURRENT_MONTH, 1));
03372       ClrBit(ge->acceptance_pickup, GoodsEntry::GES_CURRENT_MONTH);
03373     }
03374   }
03375 }
03376 
03377 
03378 void ModifyStationRatingAround(TileIndex tile, Owner owner, int amount, uint radius)
03379 {
03380   Station *st;
03381 
03382   FOR_ALL_STATIONS(st) {
03383     if (st->owner == owner &&
03384         DistanceManhattan(tile, st->xy) <= radius) {
03385       for (CargoID i = 0; i < NUM_CARGO; i++) {
03386         GoodsEntry *ge = &st->goods[i];
03387 
03388         if (ge->acceptance_pickup != 0) {
03389           ge->rating = Clamp(ge->rating + amount, 0, 255);
03390         }
03391       }
03392     }
03393   }
03394 }
03395 
03396 static uint UpdateStationWaiting(Station *st, CargoID type, uint amount, SourceType source_type, SourceID source_id)
03397 {
03398   /* We can't allocate a CargoPacket? Then don't do anything
03399    * at all; i.e. just discard the incoming cargo. */
03400   if (!CargoPacket::CanAllocateItem()) return 0;
03401 
03402   GoodsEntry &ge = st->goods[type];
03403   amount += ge.amount_fract;
03404   ge.amount_fract = GB(amount, 0, 8);
03405 
03406   amount >>= 8;
03407   /* No new "real" cargo item yet. */
03408   if (amount == 0) return 0;
03409 
03410   ge.cargo.Append(new CargoPacket(st->index, st->xy, amount, source_type, source_id));
03411 
03412   if (!HasBit(ge.acceptance_pickup, GoodsEntry::GES_PICKUP)) {
03413     InvalidateWindowData(WC_STATION_LIST, st->index);
03414     SetBit(ge.acceptance_pickup, GoodsEntry::GES_PICKUP);
03415   }
03416 
03417   TriggerStationRandomisation(st, st->xy, SRT_NEW_CARGO, type);
03418   TriggerStationAnimation(st, st->xy, SAT_NEW_CARGO, type);
03419   AirportAnimationTrigger(st, AAT_STATION_NEW_CARGO, type);
03420 
03421   SetWindowDirty(WC_STATION_VIEW, st->index);
03422   st->MarkTilesDirty(true);
03423   return amount;
03424 }
03425 
03426 static bool IsUniqueStationName(const char *name)
03427 {
03428   const Station *st;
03429 
03430   FOR_ALL_STATIONS(st) {
03431     if (st->name != NULL && strcmp(st->name, name) == 0) return false;
03432   }
03433 
03434   return true;
03435 }
03436 
03446 CommandCost CmdRenameStation(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
03447 {
03448   Station *st = Station::GetIfValid(p1);
03449   if (st == NULL) return CMD_ERROR;
03450 
03451   CommandCost ret = CheckOwnership(st->owner);
03452   if (ret.Failed()) return ret;
03453 
03454   bool reset = StrEmpty(text);
03455 
03456   if (!reset) {
03457     if (Utf8StringLength(text) >= MAX_LENGTH_STATION_NAME_CHARS) return CMD_ERROR;
03458     if (!IsUniqueStationName(text)) return_cmd_error(STR_ERROR_NAME_MUST_BE_UNIQUE);
03459   }
03460 
03461   if (flags & DC_EXEC) {
03462     free(st->name);
03463     st->name = reset ? NULL : strdup(text);
03464 
03465     st->UpdateVirtCoord();
03466     InvalidateWindowData(WC_STATION_LIST, st->owner, 1);
03467   }
03468 
03469   return CommandCost();
03470 }
03471 
03478 void FindStationsAroundTiles(const TileArea &location, StationList *stations)
03479 {
03480   /* area to search = producer plus station catchment radius */
03481   uint max_rad = (_settings_game.station.modified_catchment ? MAX_CATCHMENT : CA_UNMODIFIED);
03482 
03483   uint x = TileX(location.tile);
03484   uint y = TileY(location.tile);
03485 
03486   uint min_x = (x > max_rad) ? x - max_rad : 0;
03487   uint max_x = x + location.w + max_rad;
03488   uint min_y = (y > max_rad) ? y - max_rad : 0;
03489   uint max_y = y + location.h + max_rad;
03490 
03491   if (min_x == 0 && _settings_game.construction.freeform_edges) min_x = 1;
03492   if (min_y == 0 && _settings_game.construction.freeform_edges) min_y = 1;
03493   if (max_x >= MapSizeX()) max_x = MapSizeX() - 1;
03494   if (max_y >= MapSizeY()) max_y = MapSizeY() - 1;
03495 
03496   for (uint cy = min_y; cy < max_y; cy++) {
03497     for (uint cx = min_x; cx < max_x; cx++) {
03498       TileIndex cur_tile = TileXY(cx, cy);
03499       if (!IsTileType(cur_tile, MP_STATION)) continue;
03500 
03501       Station *st = Station::GetByTile(cur_tile);
03502       /* st can be NULL in case of waypoints */
03503       if (st == NULL) continue;
03504 
03505       if (_settings_game.station.modified_catchment) {
03506         int rad = st->GetCatchmentRadius();
03507         int rad_x = cx - x;
03508         int rad_y = cy - y;
03509 
03510         if (rad_x < -rad || rad_x >= rad + location.w) continue;
03511         if (rad_y < -rad || rad_y >= rad + location.h) continue;
03512       }
03513 
03514       /* Insert the station in the set. This will fail if it has
03515        * already been added.
03516        */
03517       stations->Include(st);
03518     }
03519   }
03520 }
03521 
03526 const StationList *StationFinder::GetStations()
03527 {
03528   if (this->tile != INVALID_TILE) {
03529     FindStationsAroundTiles(*this, &this->stations);
03530     this->tile = INVALID_TILE;
03531   }
03532   return &this->stations;
03533 }
03534 
03535 uint MoveGoodsToStation(CargoID type, uint amount, SourceType source_type, SourceID source_id, const StationList *all_stations)
03536 {
03537   /* Return if nothing to do. Also the rounding below fails for 0. */
03538   if (amount == 0) return 0;
03539 
03540   Station *st1 = NULL;   // Station with best rating
03541   Station *st2 = NULL;   // Second best station
03542   uint best_rating1 = 0; // rating of st1
03543   uint best_rating2 = 0; // rating of st2
03544 
03545   for (Station * const *st_iter = all_stations->Begin(); st_iter != all_stations->End(); ++st_iter) {
03546     Station *st = *st_iter;
03547 
03548     /* Is the station reserved exclusively for somebody else? */
03549     if (st->town->exclusive_counter > 0 && st->town->exclusivity != st->owner) continue;
03550 
03551     if (st->goods[type].rating == 0) continue; // Lowest possible rating, better not to give cargo anymore
03552 
03553     if (_settings_game.order.selectgoods && !st->goods[type].HasVehicleEverTriedLoading()) continue; // Selectively servicing stations, and not this one
03554 
03555     if (IsCargoInClass(type, CC_PASSENGERS)) {
03556       if (st->facilities == FACIL_TRUCK_STOP) continue; // passengers are never served by just a truck stop
03557     } else {
03558       if (st->facilities == FACIL_BUS_STOP) continue; // non-passengers are never served by just a bus stop
03559     }
03560 
03561     /* This station can be used, add it to st1/st2 */
03562     if (st1 == NULL || st->goods[type].rating >= best_rating1) {
03563       st2 = st1; best_rating2 = best_rating1; st1 = st; best_rating1 = st->goods[type].rating;
03564     } else if (st2 == NULL || st->goods[type].rating >= best_rating2) {
03565       st2 = st; best_rating2 = st->goods[type].rating;
03566     }
03567   }
03568 
03569   /* no stations around at all? */
03570   if (st1 == NULL) return 0;
03571 
03572   /* From now we'll calculate with fractal cargo amounts.
03573    * First determine how much cargo we really have. */
03574   amount *= best_rating1 + 1;
03575 
03576   if (st2 == NULL) {
03577     /* only one station around */
03578     return UpdateStationWaiting(st1, type, amount, source_type, source_id);
03579   }
03580 
03581   /* several stations around, the best two (highest rating) are in st1 and st2 */
03582   assert(st1 != NULL);
03583   assert(st2 != NULL);
03584   assert(best_rating1 != 0 || best_rating2 != 0);
03585 
03586   /* Then determine the amount the worst station gets. We do it this way as the
03587    * best should get a bonus, which in this case is the rounding difference from
03588    * this calculation. In reality that will mean the bonus will be pretty low.
03589    * Nevertheless, the best station should always get the most cargo regardless
03590    * of rounding issues. */
03591   uint worst_cargo = amount * best_rating2 / (best_rating1 + best_rating2);
03592   assert(worst_cargo <= (amount - worst_cargo));
03593 
03594   /* And then send the cargo to the stations! */
03595   uint moved = UpdateStationWaiting(st1, type, amount - worst_cargo, source_type, source_id);
03596   /* These two UpdateStationWaiting's can't be in the statement as then the order
03597    * of execution would be undefined and that could cause desyncs with callbacks. */
03598   return moved + UpdateStationWaiting(st2, type, worst_cargo, source_type, source_id);
03599 }
03600 
03601 void BuildOilRig(TileIndex tile)
03602 {
03603   if (!Station::CanAllocateItem()) {
03604     DEBUG(misc, 0, "Can't allocate station for oilrig at 0x%X, reverting to oilrig only", tile);
03605     return;
03606   }
03607 
03608   Station *st = new Station(tile);
03609   st->town = ClosestTownFromTile(tile, UINT_MAX);
03610 
03611   st->string_id = GenerateStationName(st, tile, STATIONNAMING_OILRIG);
03612 
03613   assert(IsTileType(tile, MP_INDUSTRY));
03614   DeleteAnimatedTile(tile);
03615   MakeOilrig(tile, st->index, GetWaterClass(tile));
03616 
03617   st->owner = OWNER_NONE;
03618   st->airport.type = AT_OILRIG;
03619   st->airport.Add(tile);
03620   st->dock_tile = tile;
03621   st->facilities = FACIL_AIRPORT | FACIL_DOCK;
03622   st->build_date = _date;
03623 
03624   st->rect.BeforeAddTile(tile, StationRect::ADD_FORCE);
03625 
03626   st->UpdateVirtCoord();
03627   UpdateStationAcceptance(st, false);
03628   st->RecomputeIndustriesNear();
03629 }
03630 
03631 void DeleteOilRig(TileIndex tile)
03632 {
03633   Station *st = Station::GetByTile(tile);
03634 
03635   MakeWaterKeepingClass(tile, OWNER_NONE);
03636 
03637   st->dock_tile = INVALID_TILE;
03638   st->airport.Clear();
03639   st->facilities &= ~(FACIL_AIRPORT | FACIL_DOCK);
03640   st->airport.flags = 0;
03641 
03642   st->rect.AfterRemoveTile(st, tile);
03643 
03644   st->UpdateVirtCoord();
03645   st->RecomputeIndustriesNear();
03646   if (!st->IsInUse()) delete st;
03647 }
03648 
03649 static void ChangeTileOwner_Station(TileIndex tile, Owner old_owner, Owner new_owner)
03650 {
03651   if (IsRoadStopTile(tile)) {
03652     for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
03653       /* Update all roadtypes, no matter if they are present */
03654       if (GetRoadOwner(tile, rt) == old_owner) {
03655         if (HasTileRoadType(tile, rt)) {
03656           /* A drive-through road-stop has always two road bits. No need to dirty windows here, we'll redraw the whole screen anyway. */
03657           Company::Get(old_owner)->infrastructure.road[rt] -= 2;
03658           if (new_owner != INVALID_OWNER) Company::Get(new_owner)->infrastructure.road[rt] += 2;
03659         }
03660         SetRoadOwner(tile, rt, new_owner == INVALID_OWNER ? OWNER_NONE : new_owner);
03661       }
03662     }
03663   }
03664 
03665   if (!IsTileOwner(tile, old_owner)) return;
03666 
03667   if (new_owner != INVALID_OWNER) {
03668     /* Update company infrastructure counts. Only do it here
03669      * if the new owner is valid as otherwise the clear
03670      * command will do it for us. No need to dirty windows
03671      * here, we'll redraw the whole screen anyway.*/
03672     Company *old_company = Company::Get(old_owner);
03673     Company *new_company = Company::Get(new_owner);
03674 
03675     /* Update counts for underlying infrastructure. */
03676     switch (GetStationType(tile)) {
03677       case STATION_RAIL:
03678       case STATION_WAYPOINT:
03679         if (!IsStationTileBlocked(tile)) {
03680           old_company->infrastructure.rail[GetRailType(tile)]--;
03681           new_company->infrastructure.rail[GetRailType(tile)]++;
03682         }
03683         break;
03684 
03685       case STATION_BUS:
03686       case STATION_TRUCK:
03687         /* Road stops were already handled above. */
03688         break;
03689 
03690       case STATION_BUOY:
03691       case STATION_DOCK:
03692         if (GetWaterClass(tile) == WATER_CLASS_CANAL) {
03693           old_company->infrastructure.water--;
03694           new_company->infrastructure.water++;
03695         }
03696         break;
03697 
03698       default:
03699         break;
03700     }
03701 
03702     /* Update station tile count. */
03703     if (!IsBuoy(tile) && !IsAirport(tile)) {
03704       old_company->infrastructure.station--;
03705       new_company->infrastructure.station++;
03706     }
03707 
03708     /* for buoys, owner of tile is owner of water, st->owner == OWNER_NONE */
03709     SetTileOwner(tile, new_owner);
03710     InvalidateWindowClassesData(WC_STATION_LIST, 0);
03711   } else {
03712     if (IsDriveThroughStopTile(tile)) {
03713       /* Remove the drive-through road stop */
03714       DoCommand(tile, 1 | 1 << 8, (GetStationType(tile) == STATION_TRUCK) ? ROADSTOP_TRUCK : ROADSTOP_BUS, DC_EXEC | DC_BANKRUPT, CMD_REMOVE_ROAD_STOP);
03715       assert(IsTileType(tile, MP_ROAD));
03716       /* Change owner of tile and all roadtypes */
03717       ChangeTileOwner(tile, old_owner, new_owner);
03718     } else {
03719       DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR);
03720       /* Set tile owner of water under (now removed) buoy and dock to OWNER_NONE.
03721        * Update owner of buoy if it was not removed (was in orders).
03722        * Do not update when owned by OWNER_WATER (sea and rivers). */
03723       if ((IsTileType(tile, MP_WATER) || IsBuoyTile(tile)) && IsTileOwner(tile, old_owner)) SetTileOwner(tile, OWNER_NONE);
03724     }
03725   }
03726 }
03727 
03736 static bool CanRemoveRoadWithStop(TileIndex tile, DoCommandFlag flags)
03737 {
03738   /* Yeah... water can always remove stops, right? */
03739   if (_current_company == OWNER_WATER) return true;
03740 
03741   RoadTypes rts = GetRoadTypes(tile);
03742   if (HasBit(rts, ROADTYPE_TRAM)) {
03743     Owner tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
03744     if (tram_owner != OWNER_NONE && CheckOwnership(tram_owner).Failed()) return false;
03745   }
03746   if (HasBit(rts, ROADTYPE_ROAD)) {
03747     Owner road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
03748     if (road_owner != OWNER_TOWN) {
03749       if (road_owner != OWNER_NONE && CheckOwnership(road_owner).Failed()) return false;
03750     } else {
03751       if (CheckAllowRemoveRoad(tile, GetAnyRoadBits(tile, ROADTYPE_ROAD), OWNER_TOWN, ROADTYPE_ROAD, flags).Failed()) return false;
03752     }
03753   }
03754 
03755   return true;
03756 }
03757 
03764 CommandCost ClearTile_Station(TileIndex tile, DoCommandFlag flags)
03765 {
03766   if (flags & DC_AUTO) {
03767     switch (GetStationType(tile)) {
03768       default: break;
03769       case STATION_RAIL:     return_cmd_error(STR_ERROR_MUST_DEMOLISH_RAILROAD);
03770       case STATION_WAYPOINT: return_cmd_error(STR_ERROR_BUILDING_MUST_BE_DEMOLISHED);
03771       case STATION_AIRPORT:  return_cmd_error(STR_ERROR_MUST_DEMOLISH_AIRPORT_FIRST);
03772       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);
03773       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);
03774       case STATION_BUOY:     return_cmd_error(STR_ERROR_BUOY_IN_THE_WAY);
03775       case STATION_DOCK:     return_cmd_error(STR_ERROR_MUST_DEMOLISH_DOCK_FIRST);
03776       case STATION_OILRIG:
03777         SetDParam(1, STR_INDUSTRY_NAME_OIL_RIG);
03778         return_cmd_error(STR_ERROR_GENERIC_OBJECT_IN_THE_WAY);
03779     }
03780   }
03781 
03782   switch (GetStationType(tile)) {
03783     case STATION_RAIL:     return RemoveRailStation(tile, flags);
03784     case STATION_WAYPOINT: return RemoveRailWaypoint(tile, flags);
03785     case STATION_AIRPORT:  return RemoveAirport(tile, flags);
03786     case STATION_TRUCK:
03787       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags)) {
03788         return_cmd_error(STR_ERROR_MUST_DEMOLISH_TRUCK_STATION_FIRST);
03789       }
03790       return RemoveRoadStop(tile, flags);
03791     case STATION_BUS:
03792       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags)) {
03793         return_cmd_error(STR_ERROR_MUST_DEMOLISH_BUS_STATION_FIRST);
03794       }
03795       return RemoveRoadStop(tile, flags);
03796     case STATION_BUOY:     return RemoveBuoy(tile, flags);
03797     case STATION_DOCK:     return RemoveDock(tile, flags);
03798     default: break;
03799   }
03800 
03801   return CMD_ERROR;
03802 }
03803 
03804 static CommandCost TerraformTile_Station(TileIndex tile, DoCommandFlag flags, int z_new, Slope tileh_new)
03805 {
03806   if (_settings_game.construction.build_on_slopes && AutoslopeEnabled()) {
03807     /* TODO: If you implement newgrf callback 149 'land slope check', you have to decide what to do with it here.
03808      *       TTDP does not call it.
03809      */
03810     if (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new)) {
03811       switch (GetStationType(tile)) {
03812         case STATION_WAYPOINT:
03813         case STATION_RAIL: {
03814           DiagDirection direction = AxisToDiagDir(GetRailStationAxis(tile));
03815           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
03816           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
03817           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03818         }
03819 
03820         case STATION_AIRPORT:
03821           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03822 
03823         case STATION_TRUCK:
03824         case STATION_BUS: {
03825           DiagDirection direction = GetRoadStopDir(tile);
03826           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
03827           if (IsDriveThroughStopTile(tile)) {
03828             if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
03829           }
03830           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03831         }
03832 
03833         default: break;
03834       }
03835     }
03836   }
03837   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
03838 }
03839 
03840 
03841 extern const TileTypeProcs _tile_type_station_procs = {
03842   DrawTile_Station,           // draw_tile_proc
03843   GetSlopePixelZ_Station,     // get_slope_z_proc
03844   ClearTile_Station,          // clear_tile_proc
03845   NULL,                       // add_accepted_cargo_proc
03846   GetTileDesc_Station,        // get_tile_desc_proc
03847   GetTileTrackStatus_Station, // get_tile_track_status_proc
03848   ClickTile_Station,          // click_tile_proc
03849   AnimateTile_Station,        // animate_tile_proc
03850   TileLoop_Station,           // tile_loop_proc
03851   ChangeTileOwner_Station,    // change_tile_owner_proc
03852   NULL,                       // add_produced_cargo_proc
03853   VehicleEnter_Station,       // vehicle_enter_tile_proc
03854   GetFoundation_Station,      // get_foundation_proc
03855   TerraformTile_Station,      // terraform_tile_proc
03856 };