station_cmd.cpp

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00001 /* $Id$ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
00012 #include "stdafx.h"
00013 #include "aircraft.h"
00014 #include "bridge_map.h"
00015 #include "cmd_helper.h"
00016 #include "viewport_func.h"
00017 #include "command_func.h"
00018 #include "town.h"
00019 #include "news_func.h"
00020 #include "train.h"
00021 #include "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 - tile_offset * (st->GetPlatformLength(tile, ReverseDiagDir(dir)) - 1);
01323       TileIndex platform_end   = tile + tile_offset * (st->GetPlatformLength(tile, dir) - 1);
01324 
01325       /* If there is at least on reservation on the platform, we reserve the whole platform. */
01326       bool reservation = false;
01327       for (TileIndex t = platform_begin; !reservation && t <= platform_end; t += tile_offset) {
01328         reservation = HasStationReservation(t);
01329       }
01330 
01331       if (reservation) {
01332         SetRailStationPlatformReservation(platform_begin, dir, true);
01333       }
01334     }
01335 
01336     st->MarkTilesDirty(false);
01337     st->UpdateVirtCoord();
01338     UpdateStationAcceptance(st, false);
01339     st->RecomputeIndustriesNear();
01340     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
01341     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
01342     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_TRAINS);
01343     DirtyCompanyInfrastructureWindows(st->owner);
01344   }
01345 
01346   return cost;
01347 }
01348 
01349 static void MakeRailStationAreaSmaller(BaseStation *st)
01350 {
01351   TileArea ta = st->train_station;
01352 
01353 restart:
01354 
01355   /* too small? */
01356   if (ta.w != 0 && ta.h != 0) {
01357     /* check the left side, x = constant, y changes */
01358     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(0, i));) {
01359       /* the left side is unused? */
01360       if (++i == ta.h) {
01361         ta.tile += TileDiffXY(1, 0);
01362         ta.w--;
01363         goto restart;
01364       }
01365     }
01366 
01367     /* check the right side, x = constant, y changes */
01368     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(ta.w - 1, i));) {
01369       /* the right side is unused? */
01370       if (++i == ta.h) {
01371         ta.w--;
01372         goto restart;
01373       }
01374     }
01375 
01376     /* check the upper side, y = constant, x changes */
01377     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(i, 0));) {
01378       /* the left side is unused? */
01379       if (++i == ta.w) {
01380         ta.tile += TileDiffXY(0, 1);
01381         ta.h--;
01382         goto restart;
01383       }
01384     }
01385 
01386     /* check the lower side, y = constant, x changes */
01387     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(i, ta.h - 1));) {
01388       /* the left side is unused? */
01389       if (++i == ta.w) {
01390         ta.h--;
01391         goto restart;
01392       }
01393     }
01394   } else {
01395     ta.Clear();
01396   }
01397 
01398   st->train_station = ta;
01399 }
01400 
01411 template <class T>
01412 CommandCost RemoveFromRailBaseStation(TileArea ta, SmallVector<T *, 4> &affected_stations, DoCommandFlag flags, Money removal_cost, bool keep_rail)
01413 {
01414   /* Count of the number of tiles removed */
01415   int quantity = 0;
01416   CommandCost total_cost(EXPENSES_CONSTRUCTION);
01417 
01418   /* Do the action for every tile into the area */
01419   TILE_AREA_LOOP(tile, ta) {
01420     /* Make sure the specified tile is a rail station */
01421     if (!HasStationTileRail(tile)) continue;
01422 
01423     /* If there is a vehicle on ground, do not allow to remove (flood) the tile */
01424     CommandCost ret = EnsureNoVehicleOnGround(tile);
01425     if (ret.Failed()) continue;
01426 
01427     /* Check ownership of station */
01428     T *st = T::GetByTile(tile);
01429     if (st == NULL) continue;
01430 
01431     if (_current_company != OWNER_WATER) {
01432       CommandCost ret = CheckOwnership(st->owner);
01433       if (ret.Failed()) continue;
01434     }
01435 
01436     /* If we reached here, the tile is valid so increase the quantity of tiles we will remove */
01437     quantity++;
01438 
01439     if (keep_rail || IsStationTileBlocked(tile)) {
01440       /* Don't refund the 'steel' of the track when we keep the
01441        *  rail, or when the tile didn't have any rail at all. */
01442       total_cost.AddCost(-_price[PR_CLEAR_RAIL]);
01443     }
01444 
01445     if (flags & DC_EXEC) {
01446       /* read variables before the station tile is removed */
01447       uint specindex = GetCustomStationSpecIndex(tile);
01448       Track track = GetRailStationTrack(tile);
01449       Owner owner = GetTileOwner(tile);
01450       RailType rt = GetRailType(tile);
01451       Train *v = NULL;
01452 
01453       if (HasStationReservation(tile)) {
01454         v = GetTrainForReservation(tile, track);
01455         if (v != NULL) {
01456           /* Free train reservation. */
01457           FreeTrainTrackReservation(v);
01458           if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), false);
01459           Vehicle *temp = v;
01460           for (; temp->Next() != NULL; temp = temp->Next()) { }
01461           if (IsRailStationTile(temp->tile)) SetRailStationPlatformReservation(temp->tile, TrackdirToExitdir(ReverseTrackdir(temp->GetVehicleTrackdir())), false);
01462         }
01463       }
01464 
01465       bool build_rail = keep_rail && !IsStationTileBlocked(tile);
01466       if (!build_rail && !IsStationTileBlocked(tile)) Company::Get(owner)->infrastructure.rail[rt]--;
01467 
01468       DoClearSquare(tile);
01469       DeleteNewGRFInspectWindow(GSF_STATIONS, tile);
01470       if (build_rail) MakeRailNormal(tile, owner, TrackToTrackBits(track), rt);
01471       Company::Get(owner)->infrastructure.station--;
01472       DirtyCompanyInfrastructureWindows(owner);
01473 
01474       st->rect.AfterRemoveTile(st, tile);
01475       AddTrackToSignalBuffer(tile, track, owner);
01476       YapfNotifyTrackLayoutChange(tile, track);
01477 
01478       DeallocateSpecFromStation(st, specindex);
01479 
01480       affected_stations.Include(st);
01481 
01482       if (v != NULL) {
01483         /* Restore station reservation. */
01484         if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), true);
01485         TryPathReserve(v, true, true);
01486         for (; v->Next() != NULL; v = v->Next()) { }
01487         if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), true);
01488       }
01489     }
01490   }
01491 
01492   if (quantity == 0) return_cmd_error(STR_ERROR_THERE_IS_NO_STATION);
01493 
01494   for (T **stp = affected_stations.Begin(); stp != affected_stations.End(); stp++) {
01495     T *st = *stp;
01496 
01497     /* now we need to make the "spanned" area of the railway station smaller
01498      * if we deleted something at the edges.
01499      * we also need to adjust train_tile. */
01500     MakeRailStationAreaSmaller(st);
01501     UpdateStationSignCoord(st);
01502 
01503     /* if we deleted the whole station, delete the train facility. */
01504     if (st->train_station.tile == INVALID_TILE) {
01505       st->facilities &= ~FACIL_TRAIN;
01506       SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_TRAINS);
01507       st->UpdateVirtCoord();
01508       DeleteStationIfEmpty(st);
01509     }
01510   }
01511 
01512   total_cost.AddCost(quantity * removal_cost);
01513   return total_cost;
01514 }
01515 
01527 CommandCost CmdRemoveFromRailStation(TileIndex start, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01528 {
01529   TileIndex end = p1 == 0 ? start : p1;
01530   if (start >= MapSize() || end >= MapSize()) return CMD_ERROR;
01531 
01532   TileArea ta(start, end);
01533   SmallVector<Station *, 4> affected_stations;
01534 
01535   CommandCost ret = RemoveFromRailBaseStation(ta, affected_stations, flags, _price[PR_CLEAR_STATION_RAIL], HasBit(p2, 0));
01536   if (ret.Failed()) return ret;
01537 
01538   /* Do all station specific functions here. */
01539   for (Station **stp = affected_stations.Begin(); stp != affected_stations.End(); stp++) {
01540     Station *st = *stp;
01541 
01542     if (st->train_station.tile == INVALID_TILE) SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_TRAINS);
01543     st->MarkTilesDirty(false);
01544     st->RecomputeIndustriesNear();
01545   }
01546 
01547   /* Now apply the rail cost to the number that we deleted */
01548   return ret;
01549 }
01550 
01562 CommandCost CmdRemoveFromRailWaypoint(TileIndex start, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01563 {
01564   TileIndex end = p1 == 0 ? start : p1;
01565   if (start >= MapSize() || end >= MapSize()) return CMD_ERROR;
01566 
01567   TileArea ta(start, end);
01568   SmallVector<Waypoint *, 4> affected_stations;
01569 
01570   return RemoveFromRailBaseStation(ta, affected_stations, flags, _price[PR_CLEAR_WAYPOINT_RAIL], HasBit(p2, 0));
01571 }
01572 
01573 
01581 template <class T>
01582 CommandCost RemoveRailStation(T *st, DoCommandFlag flags)
01583 {
01584   /* Current company owns the station? */
01585   if (_current_company != OWNER_WATER) {
01586     CommandCost ret = CheckOwnership(st->owner);
01587     if (ret.Failed()) return ret;
01588   }
01589 
01590   /* determine width and height of platforms */
01591   TileArea ta = st->train_station;
01592 
01593   assert(ta.w != 0 && ta.h != 0);
01594 
01595   CommandCost cost(EXPENSES_CONSTRUCTION);
01596   /* clear all areas of the station */
01597   TILE_AREA_LOOP(tile, ta) {
01598     /* only remove tiles that are actually train station tiles */
01599     if (!st->TileBelongsToRailStation(tile)) continue;
01600 
01601     CommandCost ret = EnsureNoVehicleOnGround(tile);
01602     if (ret.Failed()) return ret;
01603 
01604     cost.AddCost(_price[PR_CLEAR_STATION_RAIL]);
01605     if (flags & DC_EXEC) {
01606       /* read variables before the station tile is removed */
01607       Track track = GetRailStationTrack(tile);
01608       Owner owner = GetTileOwner(tile); // _current_company can be OWNER_WATER
01609       Train *v = NULL;
01610       if (HasStationReservation(tile)) {
01611         v = GetTrainForReservation(tile, track);
01612         if (v != NULL) FreeTrainTrackReservation(v);
01613       }
01614       if (!IsStationTileBlocked(tile)) Company::Get(owner)->infrastructure.rail[GetRailType(tile)]--;
01615       Company::Get(owner)->infrastructure.station--;
01616       DoClearSquare(tile);
01617       DeleteNewGRFInspectWindow(GSF_STATIONS, tile);
01618       AddTrackToSignalBuffer(tile, track, owner);
01619       YapfNotifyTrackLayoutChange(tile, track);
01620       if (v != NULL) TryPathReserve(v, true);
01621     }
01622   }
01623 
01624   if (flags & DC_EXEC) {
01625     st->rect.AfterRemoveRect(st, st->train_station);
01626 
01627     st->train_station.Clear();
01628 
01629     st->facilities &= ~FACIL_TRAIN;
01630 
01631     free(st->speclist);
01632     st->num_specs = 0;
01633     st->speclist  = NULL;
01634     st->cached_anim_triggers = 0;
01635 
01636     DirtyCompanyInfrastructureWindows(st->owner);
01637     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_TRAINS);
01638     st->UpdateVirtCoord();
01639     DeleteStationIfEmpty(st);
01640   }
01641 
01642   return cost;
01643 }
01644 
01651 static CommandCost RemoveRailStation(TileIndex tile, DoCommandFlag flags)
01652 {
01653   /* if there is flooding, remove platforms tile by tile */
01654   if (_current_company == OWNER_WATER) {
01655     return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAIL_STATION);
01656   }
01657 
01658   Station *st = Station::GetByTile(tile);
01659   CommandCost cost = RemoveRailStation(st, flags);
01660 
01661   if (flags & DC_EXEC) st->RecomputeIndustriesNear();
01662 
01663   return cost;
01664 }
01665 
01672 static CommandCost RemoveRailWaypoint(TileIndex tile, DoCommandFlag flags)
01673 {
01674   /* if there is flooding, remove waypoints tile by tile */
01675   if (_current_company == OWNER_WATER) {
01676     return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAIL_WAYPOINT);
01677   }
01678 
01679   return RemoveRailStation(Waypoint::GetByTile(tile), flags);
01680 }
01681 
01682 
01688 static RoadStop **FindRoadStopSpot(bool truck_station, Station *st)
01689 {
01690   RoadStop **primary_stop = (truck_station) ? &st->truck_stops : &st->bus_stops;
01691 
01692   if (*primary_stop == NULL) {
01693     /* we have no roadstop of the type yet, so write a "primary stop" */
01694     return primary_stop;
01695   } else {
01696     /* there are stops already, so append to the end of the list */
01697     RoadStop *stop = *primary_stop;
01698     while (stop->next != NULL) stop = stop->next;
01699     return &stop->next;
01700   }
01701 }
01702 
01703 static CommandCost RemoveRoadStop(TileIndex tile, DoCommandFlag flags);
01704 
01714 static CommandCost FindJoiningRoadStop(StationID existing_stop, StationID station_to_join, bool adjacent, TileArea ta, Station **st)
01715 {
01716   return FindJoiningBaseStation<Station, STR_ERROR_MUST_REMOVE_ROAD_STOP_FIRST>(existing_stop, station_to_join, adjacent, ta, st);
01717 }
01718 
01734 CommandCost CmdBuildRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01735 {
01736   bool type = HasBit(p2, 0);
01737   bool is_drive_through = HasBit(p2, 1);
01738   RoadTypes rts = Extract<RoadTypes, 2, 2>(p2);
01739   StationID station_to_join = GB(p2, 16, 16);
01740   bool reuse = (station_to_join != NEW_STATION);
01741   if (!reuse) station_to_join = INVALID_STATION;
01742   bool distant_join = (station_to_join != INVALID_STATION);
01743 
01744   uint8 width = (uint8)GB(p1, 0, 8);
01745   uint8 lenght = (uint8)GB(p1, 8, 8);
01746 
01747   /* Check if the requested road stop is too big */
01748   if (width > _settings_game.station.station_spread || lenght > _settings_game.station.station_spread) return_cmd_error(STR_ERROR_STATION_TOO_SPREAD_OUT);
01749   /* Check for incorrect width / length. */
01750   if (width == 0 || lenght == 0) return CMD_ERROR;
01751   /* Check if the first tile and the last tile are valid */
01752   if (!IsValidTile(tile) || TileAddWrap(tile, width - 1, lenght - 1) == INVALID_TILE) return CMD_ERROR;
01753 
01754   TileArea roadstop_area(tile, width, lenght);
01755 
01756   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
01757 
01758   if (!HasExactlyOneBit(rts) || !HasRoadTypesAvail(_current_company, rts)) return CMD_ERROR;
01759 
01760   /* Trams only have drive through stops */
01761   if (!is_drive_through && HasBit(rts, ROADTYPE_TRAM)) return CMD_ERROR;
01762 
01763   DiagDirection ddir = Extract<DiagDirection, 6, 2>(p2);
01764 
01765   /* Safeguard the parameters. */
01766   if (!IsValidDiagDirection(ddir)) return CMD_ERROR;
01767   /* If it is a drive-through stop, check for valid axis. */
01768   if (is_drive_through && !IsValidAxis((Axis)ddir)) return CMD_ERROR;
01769 
01770   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile, flags);
01771   if (ret.Failed()) return ret;
01772 
01773   /* Total road stop cost. */
01774   CommandCost cost(EXPENSES_CONSTRUCTION, roadstop_area.w * roadstop_area.h * _price[type ? PR_BUILD_STATION_TRUCK : PR_BUILD_STATION_BUS]);
01775   StationID est = INVALID_STATION;
01776   ret = CheckFlatLandRoadStop(roadstop_area, flags, is_drive_through ? 5 << ddir : 1 << ddir, is_drive_through, type, DiagDirToAxis(ddir), &est, rts);
01777   if (ret.Failed()) return ret;
01778   cost.AddCost(ret);
01779 
01780   Station *st = NULL;
01781   ret = FindJoiningRoadStop(est, station_to_join, HasBit(p2, 5), roadstop_area, &st);
01782   if (ret.Failed()) return ret;
01783 
01784   /* Check if this number of road stops can be allocated. */
01785   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);
01786 
01787   ret = BuildStationPart(&st, flags, reuse, roadstop_area, STATIONNAMING_ROAD);
01788   if (ret.Failed()) return ret;
01789 
01790   if (flags & DC_EXEC) {
01791     /* Check every tile in the area. */
01792     TILE_AREA_LOOP(cur_tile, roadstop_area) {
01793       RoadTypes cur_rts = GetRoadTypes(cur_tile);
01794       Owner road_owner = HasBit(cur_rts, ROADTYPE_ROAD) ? GetRoadOwner(cur_tile, ROADTYPE_ROAD) : _current_company;
01795       Owner tram_owner = HasBit(cur_rts, ROADTYPE_TRAM) ? GetRoadOwner(cur_tile, ROADTYPE_TRAM) : _current_company;
01796 
01797       if (IsTileType(cur_tile, MP_STATION) && IsRoadStop(cur_tile)) {
01798         RemoveRoadStop(cur_tile, flags);
01799       }
01800 
01801       RoadStop *road_stop = new RoadStop(cur_tile);
01802       /* Insert into linked list of RoadStops. */
01803       RoadStop **currstop = FindRoadStopSpot(type, st);
01804       *currstop = road_stop;
01805 
01806       if (type) {
01807         st->truck_station.Add(cur_tile);
01808       } else {
01809         st->bus_station.Add(cur_tile);
01810       }
01811 
01812       /* Initialize an empty station. */
01813       st->AddFacility((type) ? FACIL_TRUCK_STOP : FACIL_BUS_STOP, cur_tile);
01814 
01815       st->rect.BeforeAddTile(cur_tile, StationRect::ADD_TRY);
01816 
01817       RoadStopType rs_type = type ? ROADSTOP_TRUCK : ROADSTOP_BUS;
01818       if (is_drive_through) {
01819         /* Update company infrastructure counts. If the current tile is a normal
01820          * road tile, count only the new road bits needed to get a full diagonal road. */
01821         RoadType rt;
01822         FOR_EACH_SET_ROADTYPE(rt, cur_rts | rts) {
01823           Company *c = Company::GetIfValid(rt == ROADTYPE_ROAD ? road_owner : tram_owner);
01824           if (c != NULL) {
01825             c->infrastructure.road[rt] += 2 - (IsNormalRoadTile(cur_tile) && HasBit(cur_rts, rt) ? CountBits(GetRoadBits(cur_tile, rt)) : 0);
01826             DirtyCompanyInfrastructureWindows(c->index);
01827           }
01828         }
01829 
01830         MakeDriveThroughRoadStop(cur_tile, st->owner, road_owner, tram_owner, st->index, rs_type, rts | cur_rts, DiagDirToAxis(ddir));
01831         road_stop->MakeDriveThrough();
01832       } else {
01833         /* Non-drive-through stop never overbuild and always count as two road bits. */
01834         Company::Get(st->owner)->infrastructure.road[FIND_FIRST_BIT(rts)] += 2;
01835         MakeRoadStop(cur_tile, st->owner, st->index, rs_type, rts, ddir);
01836       }
01837       Company::Get(st->owner)->infrastructure.station++;
01838       DirtyCompanyInfrastructureWindows(st->owner);
01839 
01840       MarkTileDirtyByTile(cur_tile);
01841     }
01842   }
01843 
01844   if (st != NULL) {
01845     st->UpdateVirtCoord();
01846     UpdateStationAcceptance(st, false);
01847     st->RecomputeIndustriesNear();
01848     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
01849     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
01850     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_ROADVEHS);
01851   }
01852   return cost;
01853 }
01854 
01855 
01856 static Vehicle *ClearRoadStopStatusEnum(Vehicle *v, void *)
01857 {
01858   if (v->type == VEH_ROAD) {
01859     /* Okay... we are a road vehicle on a drive through road stop.
01860      * But that road stop has just been removed, so we need to make
01861      * sure we are in a valid state... however, vehicles can also
01862      * turn on road stop tiles, so only clear the 'road stop' state
01863      * bits and only when the state was 'in road stop', otherwise
01864      * we'll end up clearing the turn around bits. */
01865     RoadVehicle *rv = RoadVehicle::From(v);
01866     if (HasBit(rv->state, RVS_IN_DT_ROAD_STOP)) rv->state &= RVSB_ROAD_STOP_TRACKDIR_MASK;
01867   }
01868 
01869   return NULL;
01870 }
01871 
01872 
01879 static CommandCost RemoveRoadStop(TileIndex tile, DoCommandFlag flags)
01880 {
01881   Station *st = Station::GetByTile(tile);
01882 
01883   if (_current_company != OWNER_WATER) {
01884     CommandCost ret = CheckOwnership(st->owner);
01885     if (ret.Failed()) return ret;
01886   }
01887 
01888   bool is_truck = IsTruckStop(tile);
01889 
01890   RoadStop **primary_stop;
01891   RoadStop *cur_stop;
01892   if (is_truck) { // truck stop
01893     primary_stop = &st->truck_stops;
01894     cur_stop = RoadStop::GetByTile(tile, ROADSTOP_TRUCK);
01895   } else {
01896     primary_stop = &st->bus_stops;
01897     cur_stop = RoadStop::GetByTile(tile, ROADSTOP_BUS);
01898   }
01899 
01900   assert(cur_stop != NULL);
01901 
01902   /* don't do the check for drive-through road stops when company bankrupts */
01903   if (IsDriveThroughStopTile(tile) && (flags & DC_BANKRUPT)) {
01904     /* remove the 'going through road stop' status from all vehicles on that tile */
01905     if (flags & DC_EXEC) FindVehicleOnPos(tile, NULL, &ClearRoadStopStatusEnum);
01906   } else {
01907     CommandCost ret = EnsureNoVehicleOnGround(tile);
01908     if (ret.Failed()) return ret;
01909   }
01910 
01911   if (flags & DC_EXEC) {
01912     if (*primary_stop == cur_stop) {
01913       /* removed the first stop in the list */
01914       *primary_stop = cur_stop->next;
01915       /* removed the only stop? */
01916       if (*primary_stop == NULL) {
01917         st->facilities &= (is_truck ? ~FACIL_TRUCK_STOP : ~FACIL_BUS_STOP);
01918       }
01919     } else {
01920       /* tell the predecessor in the list to skip this stop */
01921       RoadStop *pred = *primary_stop;
01922       while (pred->next != cur_stop) pred = pred->next;
01923       pred->next = cur_stop->next;
01924     }
01925 
01926     /* Update company infrastructure counts. */
01927     RoadType rt;
01928     FOR_EACH_SET_ROADTYPE(rt, GetRoadTypes(tile)) {
01929       Company *c = Company::GetIfValid(GetRoadOwner(tile, rt));
01930       if (c != NULL) {
01931         c->infrastructure.road[rt] -= 2;
01932         DirtyCompanyInfrastructureWindows(c->index);
01933       }
01934     }
01935     Company::Get(st->owner)->infrastructure.station--;
01936 
01937     if (IsDriveThroughStopTile(tile)) {
01938       /* Clears the tile for us */
01939       cur_stop->ClearDriveThrough();
01940     } else {
01941       DoClearSquare(tile);
01942     }
01943 
01944     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_ROADVEHS);
01945     delete cur_stop;
01946 
01947     /* Make sure no vehicle is going to the old roadstop */
01948     RoadVehicle *v;
01949     FOR_ALL_ROADVEHICLES(v) {
01950       if (v->First() == v && v->current_order.IsType(OT_GOTO_STATION) &&
01951           v->dest_tile == tile) {
01952         v->dest_tile = v->GetOrderStationLocation(st->index);
01953       }
01954     }
01955 
01956     st->rect.AfterRemoveTile(st, tile);
01957 
01958     st->UpdateVirtCoord();
01959     st->RecomputeIndustriesNear();
01960     DeleteStationIfEmpty(st);
01961 
01962     /* Update the tile area of the truck/bus stop */
01963     if (is_truck) {
01964       st->truck_station.Clear();
01965       for (const RoadStop *rs = st->truck_stops; rs != NULL; rs = rs->next) st->truck_station.Add(rs->xy);
01966     } else {
01967       st->bus_station.Clear();
01968       for (const RoadStop *rs = st->bus_stops; rs != NULL; rs = rs->next) st->bus_station.Add(rs->xy);
01969     }
01970   }
01971 
01972   return CommandCost(EXPENSES_CONSTRUCTION, _price[is_truck ? PR_CLEAR_STATION_TRUCK : PR_CLEAR_STATION_BUS]);
01973 }
01974 
01985 CommandCost CmdRemoveRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01986 {
01987   uint8 width = (uint8)GB(p1, 0, 8);
01988   uint8 height = (uint8)GB(p1, 8, 8);
01989 
01990   /* Check for incorrect width / height. */
01991   if (width == 0 || height == 0) return CMD_ERROR;
01992   /* Check if the first tile and the last tile are valid */
01993   if (!IsValidTile(tile) || TileAddWrap(tile, width - 1, height - 1) == INVALID_TILE) return CMD_ERROR;
01994 
01995   TileArea roadstop_area(tile, width, height);
01996 
01997   int quantity = 0;
01998   CommandCost cost(EXPENSES_CONSTRUCTION);
01999   TILE_AREA_LOOP(cur_tile, roadstop_area) {
02000     /* Make sure the specified tile is a road stop of the correct type */
02001     if (!IsTileType(cur_tile, MP_STATION) || !IsRoadStop(cur_tile) || (uint32)GetRoadStopType(cur_tile) != GB(p2, 0, 1)) continue;
02002 
02003     /* Save the stop info before it is removed */
02004     bool is_drive_through = IsDriveThroughStopTile(cur_tile);
02005     RoadTypes rts = GetRoadTypes(cur_tile);
02006     RoadBits road_bits = IsDriveThroughStopTile(cur_tile) ?
02007         ((GetRoadStopDir(cur_tile) == DIAGDIR_NE) ? ROAD_X : ROAD_Y) :
02008         DiagDirToRoadBits(GetRoadStopDir(cur_tile));
02009 
02010     Owner road_owner = GetRoadOwner(cur_tile, ROADTYPE_ROAD);
02011     Owner tram_owner = GetRoadOwner(cur_tile, ROADTYPE_TRAM);
02012     CommandCost ret = RemoveRoadStop(cur_tile, flags);
02013     if (ret.Failed()) return ret;
02014     cost.AddCost(ret);
02015 
02016     quantity++;
02017     /* If the stop was a drive-through stop replace the road */
02018     if ((flags & DC_EXEC) && is_drive_through) {
02019       MakeRoadNormal(cur_tile, road_bits, rts, ClosestTownFromTile(cur_tile, UINT_MAX)->index,
02020           road_owner, tram_owner);
02021 
02022       /* Update company infrastructure counts. */
02023       RoadType rt;
02024       FOR_EACH_SET_ROADTYPE(rt, rts) {
02025         Company *c = Company::GetIfValid(GetRoadOwner(cur_tile, rt));
02026         if (c != NULL) {
02027           c->infrastructure.road[rt] += CountBits(road_bits);
02028           DirtyCompanyInfrastructureWindows(c->index);
02029         }
02030       }
02031     }
02032   }
02033 
02034   if (quantity == 0) return_cmd_error(STR_ERROR_THERE_IS_NO_STATION);
02035 
02036   return cost;
02037 }
02038 
02045 static uint GetMinimalAirportDistanceToTile(TileIterator &it, TileIndex town_tile)
02046 {
02047   uint mindist = UINT_MAX;
02048 
02049   for (TileIndex cur_tile = it; cur_tile != INVALID_TILE; cur_tile = ++it) {
02050     mindist = min(mindist, DistanceManhattan(town_tile, cur_tile));
02051   }
02052 
02053   return mindist;
02054 }
02055 
02065 uint8 GetAirportNoiseLevelForTown(const AirportSpec *as, TileIterator &it, TileIndex town_tile)
02066 {
02067   /* 0 cannot be accounted, and 1 is the lowest that can be reduced from town.
02068    * So no need to go any further*/
02069   if (as->noise_level < 2) return as->noise_level;
02070 
02071   uint distance = GetMinimalAirportDistanceToTile(it, town_tile);
02072 
02073   /* The steps for measuring noise reduction are based on the "magical" (and arbitrary) 8 base distance
02074    * adding the town_council_tolerance 4 times, as a way to graduate, depending of the tolerance.
02075    * Basically, it says that the less tolerant a town is, the bigger the distance before
02076    * an actual decrease can be granted */
02077   uint8 town_tolerance_distance = 8 + (_settings_game.difficulty.town_council_tolerance * 4);
02078 
02079   /* now, we want to have the distance segmented using the distance judged bareable by town
02080    * This will give us the coefficient of reduction the distance provides. */
02081   uint noise_reduction = distance / town_tolerance_distance;
02082 
02083   /* If the noise reduction equals the airport noise itself, don't give it for free.
02084    * Otherwise, simply reduce the airport's level. */
02085   return noise_reduction >= as->noise_level ? 1 : as->noise_level - noise_reduction;
02086 }
02087 
02095 Town *AirportGetNearestTown(const AirportSpec *as, const TileIterator &it)
02096 {
02097   Town *t, *nearest = NULL;
02098   uint add = as->size_x + as->size_y - 2; // GetMinimalAirportDistanceToTile can differ from DistanceManhattan by this much
02099   uint mindist = UINT_MAX - add; // prevent overflow
02100   FOR_ALL_TOWNS(t) {
02101     if (DistanceManhattan(t->xy, it) < mindist + add) { // avoid calling GetMinimalAirportDistanceToTile too often
02102       TileIterator *copy = it.Clone();
02103       uint dist = GetMinimalAirportDistanceToTile(*copy, t->xy);
02104       delete copy;
02105       if (dist < mindist) {
02106         nearest = t;
02107         mindist = dist;
02108       }
02109     }
02110   }
02111 
02112   return nearest;
02113 }
02114 
02115 
02117 void UpdateAirportsNoise()
02118 {
02119   Town *t;
02120   const Station *st;
02121 
02122   FOR_ALL_TOWNS(t) t->noise_reached = 0;
02123 
02124   FOR_ALL_STATIONS(st) {
02125     if (st->airport.tile != INVALID_TILE && st->airport.type != AT_OILRIG) {
02126       const AirportSpec *as = st->airport.GetSpec();
02127       AirportTileIterator it(st);
02128       Town *nearest = AirportGetNearestTown(as, it);
02129       nearest->noise_reached += GetAirportNoiseLevelForTown(as, it, nearest->xy);
02130     }
02131   }
02132 }
02133 
02147 CommandCost CmdBuildAirport(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
02148 {
02149   StationID station_to_join = GB(p2, 16, 16);
02150   bool reuse = (station_to_join != NEW_STATION);
02151   if (!reuse) station_to_join = INVALID_STATION;
02152   bool distant_join = (station_to_join != INVALID_STATION);
02153   byte airport_type = GB(p1, 0, 8);
02154   byte layout = GB(p1, 8, 8);
02155 
02156   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
02157 
02158   if (airport_type >= NUM_AIRPORTS) return CMD_ERROR;
02159 
02160   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile, flags);
02161   if (ret.Failed()) return ret;
02162 
02163   /* Check if a valid, buildable airport was chosen for construction */
02164   const AirportSpec *as = AirportSpec::Get(airport_type);
02165   if (!as->IsAvailable() || layout >= as->num_table) return CMD_ERROR;
02166 
02167   Direction rotation = as->rotation[layout];
02168   int w = as->size_x;
02169   int h = as->size_y;
02170   if (rotation == DIR_E || rotation == DIR_W) Swap(w, h);
02171   TileArea airport_area = TileArea(tile, w, h);
02172 
02173   if (w > _settings_game.station.station_spread || h > _settings_game.station.station_spread) {
02174     return_cmd_error(STR_ERROR_STATION_TOO_SPREAD_OUT);
02175   }
02176 
02177   CommandCost cost = CheckFlatLand(airport_area, flags);
02178   if (cost.Failed()) return cost;
02179 
02180   /* The noise level is the noise from the airport and reduce it to account for the distance to the town center. */
02181   AirportTileTableIterator iter(as->table[layout], tile);
02182   Town *nearest = AirportGetNearestTown(as, iter);
02183   uint newnoise_level = GetAirportNoiseLevelForTown(as, iter, nearest->xy);
02184 
02185   /* Check if local auth would allow a new airport */
02186   StringID authority_refuse_message = STR_NULL;
02187   Town *authority_refuse_town = NULL;
02188 
02189   if (_settings_game.economy.station_noise_level) {
02190     /* do not allow to build a new airport if this raise the town noise over the maximum allowed by town */
02191     if ((nearest->noise_reached + newnoise_level) > nearest->MaxTownNoise()) {
02192       authority_refuse_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_NOISE;
02193       authority_refuse_town = nearest;
02194     }
02195   } else {
02196     Town *t = ClosestTownFromTile(tile, UINT_MAX);
02197     uint num = 0;
02198     const Station *st;
02199     FOR_ALL_STATIONS(st) {
02200       if (st->town == t && (st->facilities & FACIL_AIRPORT) && st->airport.type != AT_OILRIG) num++;
02201     }
02202     if (num >= 2) {
02203       authority_refuse_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_AIRPORT;
02204       authority_refuse_town = t;
02205     }
02206   }
02207 
02208   if (authority_refuse_message != STR_NULL) {
02209     SetDParam(0, authority_refuse_town->index);
02210     return_cmd_error(authority_refuse_message);
02211   }
02212 
02213   Station *st = NULL;
02214   ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p2, 0), airport_area, &st);
02215   if (ret.Failed()) return ret;
02216 
02217   /* Distant join */
02218   if (st == NULL && distant_join) st = Station::GetIfValid(station_to_join);
02219 
02220   ret = BuildStationPart(&st, flags, reuse, airport_area, (GetAirport(airport_type)->flags & AirportFTAClass::AIRPLANES) ? STATIONNAMING_AIRPORT : STATIONNAMING_HELIPORT);
02221   if (ret.Failed()) return ret;
02222 
02223   if (st != NULL && st->airport.tile != INVALID_TILE) {
02224     return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_AIRPORT);
02225   }
02226 
02227   for (AirportTileTableIterator iter(as->table[layout], tile); iter != INVALID_TILE; ++iter) {
02228     cost.AddCost(_price[PR_BUILD_STATION_AIRPORT]);
02229   }
02230 
02231   if (flags & DC_EXEC) {
02232     /* Always add the noise, so there will be no need to recalculate when option toggles */
02233     nearest->noise_reached += newnoise_level;
02234 
02235     st->AddFacility(FACIL_AIRPORT, tile);
02236     st->airport.type = airport_type;
02237     st->airport.layout = layout;
02238     st->airport.flags = 0;
02239     st->airport.rotation = rotation;
02240 
02241     st->rect.BeforeAddRect(tile, w, h, StationRect::ADD_TRY);
02242 
02243     for (AirportTileTableIterator iter(as->table[layout], tile); iter != INVALID_TILE; ++iter) {
02244       MakeAirport(iter, st->owner, st->index, iter.GetStationGfx(), WATER_CLASS_INVALID);
02245       SetStationTileRandomBits(iter, GB(Random(), 0, 4));
02246       st->airport.Add(iter);
02247 
02248       if (AirportTileSpec::Get(GetTranslatedAirportTileID(iter.GetStationGfx()))->animation.status != ANIM_STATUS_NO_ANIMATION) AddAnimatedTile(iter);
02249     }
02250 
02251     /* Only call the animation trigger after all tiles have been built */
02252     for (AirportTileTableIterator iter(as->table[layout], tile); iter != INVALID_TILE; ++iter) {
02253       AirportTileAnimationTrigger(st, iter, AAT_BUILT);
02254     }
02255 
02256     UpdateAirplanesOnNewStation(st);
02257 
02258     Company::Get(st->owner)->infrastructure.airport++;
02259     DirtyCompanyInfrastructureWindows(st->owner);
02260 
02261     st->UpdateVirtCoord();
02262     UpdateStationAcceptance(st, false);
02263     st->RecomputeIndustriesNear();
02264     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
02265     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
02266     InvalidateWindowData(WC_STATION_VIEW, st->index, -1);
02267 
02268     if (_settings_game.economy.station_noise_level) {
02269       SetWindowDirty(WC_TOWN_VIEW, st->town->index);
02270     }
02271   }
02272 
02273   return cost;
02274 }
02275 
02282 static CommandCost RemoveAirport(TileIndex tile, DoCommandFlag flags)
02283 {
02284   Station *st = Station::GetByTile(tile);
02285 
02286   if (_current_company != OWNER_WATER) {
02287     CommandCost ret = CheckOwnership(st->owner);
02288     if (ret.Failed()) return ret;
02289   }
02290 
02291   tile = st->airport.tile;
02292 
02293   CommandCost cost(EXPENSES_CONSTRUCTION);
02294 
02295   const Aircraft *a;
02296   FOR_ALL_AIRCRAFT(a) {
02297     if (!a->IsNormalAircraft()) continue;
02298     if (a->targetairport == st->index && a->state != FLYING) return CMD_ERROR;
02299   }
02300 
02301   if (flags & DC_EXEC) {
02302     const AirportSpec *as = st->airport.GetSpec();
02303     /* The noise level is the noise from the airport and reduce it to account for the distance to the town center.
02304      * And as for construction, always remove it, even if the setting is not set, in order to avoid the
02305      * need of recalculation */
02306     AirportTileIterator it(st);
02307     Town *nearest = AirportGetNearestTown(as, it);
02308     nearest->noise_reached -= GetAirportNoiseLevelForTown(as, it, nearest->xy);
02309   }
02310 
02311   TILE_AREA_LOOP(tile_cur, st->airport) {
02312     if (!st->TileBelongsToAirport(tile_cur)) continue;
02313 
02314     CommandCost ret = EnsureNoVehicleOnGround(tile_cur);
02315     if (ret.Failed()) return ret;
02316 
02317     cost.AddCost(_price[PR_CLEAR_STATION_AIRPORT]);
02318 
02319     if (flags & DC_EXEC) {
02320       if (IsHangarTile(tile_cur)) OrderBackup::Reset(tile_cur, false);
02321       DeleteAnimatedTile(tile_cur);
02322       DoClearSquare(tile_cur);
02323       DeleteNewGRFInspectWindow(GSF_AIRPORTTILES, tile_cur);
02324     }
02325   }
02326 
02327   if (flags & DC_EXEC) {
02328     /* Clear the persistent storage. */
02329     delete st->airport.psa;
02330 
02331     for (uint i = 0; i < st->airport.GetNumHangars(); ++i) {
02332       DeleteWindowById(
02333         WC_VEHICLE_DEPOT, st->airport.GetHangarTile(i)
02334       );
02335     }
02336 
02337     st->rect.AfterRemoveRect(st, st->airport);
02338 
02339     st->airport.Clear();
02340     st->facilities &= ~FACIL_AIRPORT;
02341 
02342     InvalidateWindowData(WC_STATION_VIEW, st->index, -1);
02343 
02344     if (_settings_game.economy.station_noise_level) {
02345       SetWindowDirty(WC_TOWN_VIEW, st->town->index);
02346     }
02347 
02348     Company::Get(st->owner)->infrastructure.airport--;
02349     DirtyCompanyInfrastructureWindows(st->owner);
02350 
02351     st->UpdateVirtCoord();
02352     st->RecomputeIndustriesNear();
02353     DeleteStationIfEmpty(st);
02354     DeleteNewGRFInspectWindow(GSF_AIRPORTS, st->index);
02355   }
02356 
02357   return cost;
02358 }
02359 
02369 CommandCost CmdOpenCloseAirport(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
02370 {
02371   if (!Station::IsValidID(p1)) return CMD_ERROR;
02372   Station *st = Station::Get(p1);
02373 
02374   if (!(st->facilities & FACIL_AIRPORT) || st->owner == OWNER_NONE) return CMD_ERROR;
02375 
02376   CommandCost ret = CheckOwnership(st->owner);
02377   if (ret.Failed()) return ret;
02378 
02379   if (flags & DC_EXEC) {
02380     st->airport.flags ^= AIRPORT_CLOSED_block;
02381     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_CLOSE_AIRPORT);
02382   }
02383   return CommandCost();
02384 }
02385 
02392 bool HasStationInUse(StationID station, bool include_company, CompanyID company)
02393 {
02394   const Vehicle *v;
02395   FOR_ALL_VEHICLES(v) {
02396     if ((v->owner == company) == include_company) {
02397       const Order *order;
02398       FOR_VEHICLE_ORDERS(v, order) {
02399         if ((order->IsType(OT_GOTO_STATION) || order->IsType(OT_GOTO_WAYPOINT)) && order->GetDestination() == station) {
02400           return true;
02401         }
02402       }
02403     }
02404   }
02405   return false;
02406 }
02407 
02408 static const TileIndexDiffC _dock_tileoffs_chkaround[] = {
02409   {-1,  0},
02410   { 0,  0},
02411   { 0,  0},
02412   { 0, -1}
02413 };
02414 static const byte _dock_w_chk[4] = { 2, 1, 2, 1 };
02415 static const byte _dock_h_chk[4] = { 1, 2, 1, 2 };
02416 
02426 CommandCost CmdBuildDock(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
02427 {
02428   StationID station_to_join = GB(p2, 16, 16);
02429   bool reuse = (station_to_join != NEW_STATION);
02430   if (!reuse) station_to_join = INVALID_STATION;
02431   bool distant_join = (station_to_join != INVALID_STATION);
02432 
02433   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
02434 
02435   DiagDirection direction = GetInclinedSlopeDirection(GetTileSlope(tile));
02436   if (direction == INVALID_DIAGDIR) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02437   direction = ReverseDiagDir(direction);
02438 
02439   /* Docks cannot be placed on rapids */
02440   if (HasTileWaterGround(tile)) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02441 
02442   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile, flags);
02443   if (ret.Failed()) return ret;
02444 
02445   if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
02446 
02447   ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
02448   if (ret.Failed()) return ret;
02449 
02450   TileIndex tile_cur = tile + TileOffsByDiagDir(direction);
02451 
02452   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur) != SLOPE_FLAT) {
02453     return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02454   }
02455 
02456   if (MayHaveBridgeAbove(tile_cur) && IsBridgeAbove(tile_cur)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
02457 
02458   /* Get the water class of the water tile before it is cleared.*/
02459   WaterClass wc = GetWaterClass(tile_cur);
02460 
02461   ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
02462   if (ret.Failed()) return ret;
02463 
02464   tile_cur += TileOffsByDiagDir(direction);
02465   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur) != SLOPE_FLAT) {
02466     return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02467   }
02468 
02469   TileArea dock_area = TileArea(tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
02470       _dock_w_chk[direction], _dock_h_chk[direction]);
02471 
02472   /* middle */
02473   Station *st = NULL;
02474   ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p1, 0), dock_area, &st);
02475   if (ret.Failed()) return ret;
02476 
02477   /* Distant join */
02478   if (st == NULL && distant_join) st = Station::GetIfValid(station_to_join);
02479 
02480   ret = BuildStationPart(&st, flags, reuse, dock_area, STATIONNAMING_DOCK);
02481   if (ret.Failed()) return ret;
02482 
02483   if (st != NULL && st->dock_tile != INVALID_TILE) return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_DOCK);
02484 
02485   if (flags & DC_EXEC) {
02486     st->dock_tile = tile;
02487     st->AddFacility(FACIL_DOCK, tile);
02488 
02489     st->rect.BeforeAddRect(dock_area.tile, dock_area.w, dock_area.h, StationRect::ADD_TRY);
02490 
02491     /* If the water part of the dock is on a canal, update infrastructure counts.
02492      * This is needed as we've unconditionally cleared that tile before. */
02493     if (wc == WATER_CLASS_CANAL) {
02494       Company::Get(st->owner)->infrastructure.water++;
02495     }
02496     Company::Get(st->owner)->infrastructure.station += 2;
02497     DirtyCompanyInfrastructureWindows(st->owner);
02498 
02499     MakeDock(tile, st->owner, st->index, direction, wc);
02500 
02501     st->UpdateVirtCoord();
02502     UpdateStationAcceptance(st, false);
02503     st->RecomputeIndustriesNear();
02504     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
02505     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
02506     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_SHIPS);
02507   }
02508 
02509   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_STATION_DOCK]);
02510 }
02511 
02518 static CommandCost RemoveDock(TileIndex tile, DoCommandFlag flags)
02519 {
02520   Station *st = Station::GetByTile(tile);
02521   CommandCost ret = CheckOwnership(st->owner);
02522   if (ret.Failed()) return ret;
02523 
02524   TileIndex docking_location = TILE_ADD(st->dock_tile, ToTileIndexDiff(GetDockOffset(st->dock_tile)));
02525 
02526   TileIndex tile1 = st->dock_tile;
02527   TileIndex tile2 = tile1 + TileOffsByDiagDir(GetDockDirection(tile1));
02528 
02529   ret = EnsureNoVehicleOnGround(tile1);
02530   if (ret.Succeeded()) ret = EnsureNoVehicleOnGround(tile2);
02531   if (ret.Failed()) return ret;
02532 
02533   if (flags & DC_EXEC) {
02534     DoClearSquare(tile1);
02535     MarkTileDirtyByTile(tile1);
02536     MakeWaterKeepingClass(tile2, st->owner);
02537 
02538     st->rect.AfterRemoveTile(st, tile1);
02539     st->rect.AfterRemoveTile(st, tile2);
02540 
02541     st->dock_tile = INVALID_TILE;
02542     st->facilities &= ~FACIL_DOCK;
02543 
02544     Company::Get(st->owner)->infrastructure.station -= 2;
02545     DirtyCompanyInfrastructureWindows(st->owner);
02546 
02547     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_SHIPS);
02548     st->UpdateVirtCoord();
02549     st->RecomputeIndustriesNear();
02550     DeleteStationIfEmpty(st);
02551 
02552     /* All ships that were going to our station, can't go to it anymore.
02553      * Just clear the order, then automatically the next appropriate order
02554      * will be selected and in case of no appropriate order it will just
02555      * wander around the world. */
02556     Ship *s;
02557     FOR_ALL_SHIPS(s) {
02558       if (s->current_order.IsType(OT_LOADING) && s->tile == docking_location) {
02559         s->LeaveStation();
02560       }
02561 
02562       if (s->dest_tile == docking_location) {
02563         s->dest_tile = 0;
02564         s->current_order.Free();
02565       }
02566     }
02567   }
02568 
02569   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_STATION_DOCK]);
02570 }
02571 
02572 #include "table/station_land.h"
02573 
02574 const DrawTileSprites *GetStationTileLayout(StationType st, byte gfx)
02575 {
02576   return &_station_display_datas[st][gfx];
02577 }
02578 
02588 bool SplitGroundSpriteForOverlay(const TileInfo *ti, SpriteID *ground, RailTrackOffset *overlay_offset)
02589 {
02590   bool snow_desert;
02591   switch (*ground) {
02592     case SPR_RAIL_TRACK_X:
02593       snow_desert = false;
02594       *overlay_offset = RTO_X;
02595       break;
02596 
02597     case SPR_RAIL_TRACK_Y:
02598       snow_desert = false;
02599       *overlay_offset = RTO_Y;
02600       break;
02601 
02602     case SPR_RAIL_TRACK_X_SNOW:
02603       snow_desert = true;
02604       *overlay_offset = RTO_X;
02605       break;
02606 
02607     case SPR_RAIL_TRACK_Y_SNOW:
02608       snow_desert = true;
02609       *overlay_offset = RTO_Y;
02610       break;
02611 
02612     default:
02613       return false;
02614   }
02615 
02616   if (ti != NULL) {
02617     /* Decide snow/desert from tile */
02618     switch (_settings_game.game_creation.landscape) {
02619       case LT_ARCTIC:
02620         snow_desert = (uint)ti->z > GetSnowLine() * TILE_HEIGHT;
02621         break;
02622 
02623       case LT_TROPIC:
02624         snow_desert = GetTropicZone(ti->tile) == TROPICZONE_DESERT;
02625         break;
02626 
02627       default:
02628         break;
02629     }
02630   }
02631 
02632   *ground = snow_desert ? SPR_FLAT_SNOW_DESERT_TILE : SPR_FLAT_GRASS_TILE;
02633   return true;
02634 }
02635 
02636 static void DrawTile_Station(TileInfo *ti)
02637 {
02638   const NewGRFSpriteLayout *layout = NULL;
02639   DrawTileSprites tmp_rail_layout;
02640   const DrawTileSprites *t = NULL;
02641   RoadTypes roadtypes;
02642   int32 total_offset;
02643   const RailtypeInfo *rti = NULL;
02644   uint32 relocation = 0;
02645   uint32 ground_relocation = 0;
02646   BaseStation *st = NULL;
02647   const StationSpec *statspec = NULL;
02648   uint tile_layout = 0;
02649 
02650   if (HasStationRail(ti->tile)) {
02651     rti = GetRailTypeInfo(GetRailType(ti->tile));
02652     roadtypes = ROADTYPES_NONE;
02653     total_offset = rti->GetRailtypeSpriteOffset();
02654 
02655     if (IsCustomStationSpecIndex(ti->tile)) {
02656       /* look for customization */
02657       st = BaseStation::GetByTile(ti->tile);
02658       statspec = st->speclist[GetCustomStationSpecIndex(ti->tile)].spec;
02659 
02660       if (statspec != NULL) {
02661         tile_layout = GetStationGfx(ti->tile);
02662 
02663         if (HasBit(statspec->callback_mask, CBM_STATION_SPRITE_LAYOUT)) {
02664           uint16 callback = GetStationCallback(CBID_STATION_SPRITE_LAYOUT, 0, 0, statspec, st, ti->tile);
02665           if (callback != CALLBACK_FAILED) tile_layout = (callback & ~1) + GetRailStationAxis(ti->tile);
02666         }
02667 
02668         /* Ensure the chosen tile layout is valid for this custom station */
02669         if (statspec->renderdata != NULL) {
02670           layout = &statspec->renderdata[tile_layout < statspec->tiles ? tile_layout : (uint)GetRailStationAxis(ti->tile)];
02671           if (!layout->NeedsPreprocessing()) {
02672             t = layout;
02673             layout = NULL;
02674           }
02675         }
02676       }
02677     }
02678   } else {
02679     roadtypes = IsRoadStop(ti->tile) ? GetRoadTypes(ti->tile) : ROADTYPES_NONE;
02680     total_offset = 0;
02681   }
02682 
02683   StationGfx gfx = GetStationGfx(ti->tile);
02684   if (IsAirport(ti->tile)) {
02685     gfx = GetAirportGfx(ti->tile);
02686     if (gfx >= NEW_AIRPORTTILE_OFFSET) {
02687       const AirportTileSpec *ats = AirportTileSpec::Get(gfx);
02688       if (ats->grf_prop.spritegroup[0] != NULL && DrawNewAirportTile(ti, Station::GetByTile(ti->tile), gfx, ats)) {
02689         return;
02690       }
02691       /* No sprite group (or no valid one) found, meaning no graphics associated.
02692        * Use the substitute one instead */
02693       assert(ats->grf_prop.subst_id != INVALID_AIRPORTTILE);
02694       gfx = ats->grf_prop.subst_id;
02695     }
02696     switch (gfx) {
02697       case APT_RADAR_GRASS_FENCE_SW:
02698         t = &_station_display_datas_airport_radar_grass_fence_sw[GetAnimationFrame(ti->tile)];
02699         break;
02700       case APT_GRASS_FENCE_NE_FLAG:
02701         t = &_station_display_datas_airport_flag_grass_fence_ne[GetAnimationFrame(ti->tile)];
02702         break;
02703       case APT_RADAR_FENCE_SW:
02704         t = &_station_display_datas_airport_radar_fence_sw[GetAnimationFrame(ti->tile)];
02705         break;
02706       case APT_RADAR_FENCE_NE:
02707         t = &_station_display_datas_airport_radar_fence_ne[GetAnimationFrame(ti->tile)];
02708         break;
02709       case APT_GRASS_FENCE_NE_FLAG_2:
02710         t = &_station_display_datas_airport_flag_grass_fence_ne_2[GetAnimationFrame(ti->tile)];
02711         break;
02712     }
02713   }
02714 
02715   Owner owner = GetTileOwner(ti->tile);
02716 
02717   PaletteID palette;
02718   if (Company::IsValidID(owner)) {
02719     palette = COMPANY_SPRITE_COLOUR(owner);
02720   } else {
02721     /* Some stations are not owner by a company, namely oil rigs */
02722     palette = PALETTE_TO_GREY;
02723   }
02724 
02725   if (layout == NULL && (t == NULL || t->seq == NULL)) t = GetStationTileLayout(GetStationType(ti->tile), gfx);
02726 
02727   /* don't show foundation for docks */
02728   if (ti->tileh != SLOPE_FLAT && !IsDock(ti->tile)) {
02729     if (statspec != NULL && HasBit(statspec->flags, SSF_CUSTOM_FOUNDATIONS)) {
02730       /* Station has custom foundations.
02731        * Check whether the foundation continues beyond the tile's upper sides. */
02732       uint edge_info = 0;
02733       int z;
02734       Slope slope = GetFoundationPixelSlope(ti->tile, &z);
02735       if (!HasFoundationNW(ti->tile, slope, z)) SetBit(edge_info, 0);
02736       if (!HasFoundationNE(ti->tile, slope, z)) SetBit(edge_info, 1);
02737       SpriteID image = GetCustomStationFoundationRelocation(statspec, st, ti->tile, tile_layout, edge_info);
02738       if (image == 0) goto draw_default_foundation;
02739 
02740       if (HasBit(statspec->flags, SSF_EXTENDED_FOUNDATIONS)) {
02741         /* Station provides extended foundations. */
02742 
02743         static const uint8 foundation_parts[] = {
02744           0, 0, 0, 0, // Invalid,  Invalid,   Invalid,   SLOPE_SW
02745           0, 1, 2, 3, // Invalid,  SLOPE_EW,  SLOPE_SE,  SLOPE_WSE
02746           0, 4, 5, 6, // Invalid,  SLOPE_NW,  SLOPE_NS,  SLOPE_NWS
02747           7, 8, 9     // SLOPE_NE, SLOPE_ENW, SLOPE_SEN
02748         };
02749 
02750         AddSortableSpriteToDraw(image + foundation_parts[ti->tileh], PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
02751       } else {
02752         /* Draw simple foundations, built up from 8 possible foundation sprites. */
02753 
02754         /* Each set bit represents one of the eight composite sprites to be drawn.
02755          * 'Invalid' entries will not drawn but are included for completeness. */
02756         static const uint8 composite_foundation_parts[] = {
02757           /* Invalid  (00000000), Invalid   (11010001), Invalid   (11100100), SLOPE_SW  (11100000) */
02758              0x00,                0xD1,                 0xE4,                 0xE0,
02759           /* Invalid  (11001010), SLOPE_EW  (11001001), SLOPE_SE  (11000100), SLOPE_WSE (11000000) */
02760              0xCA,                0xC9,                 0xC4,                 0xC0,
02761           /* Invalid  (11010010), SLOPE_NW  (10010001), SLOPE_NS  (11100100), SLOPE_NWS (10100000) */
02762              0xD2,                0x91,                 0xE4,                 0xA0,
02763           /* SLOPE_NE (01001010), SLOPE_ENW (00001001), SLOPE_SEN (01000100) */
02764              0x4A,                0x09,                 0x44
02765         };
02766 
02767         uint8 parts = composite_foundation_parts[ti->tileh];
02768 
02769         /* If foundations continue beyond the tile's upper sides then
02770          * mask out the last two pieces. */
02771         if (HasBit(edge_info, 0)) ClrBit(parts, 6);
02772         if (HasBit(edge_info, 1)) ClrBit(parts, 7);
02773 
02774         if (parts == 0) {
02775           /* We always have to draw at least one sprite to make sure there is a boundingbox and a sprite with the
02776            * correct offset for the childsprites.
02777            * So, draw the (completely empty) sprite of the default foundations. */
02778           goto draw_default_foundation;
02779         }
02780 
02781         StartSpriteCombine();
02782         for (int i = 0; i < 8; i++) {
02783           if (HasBit(parts, i)) {
02784             AddSortableSpriteToDraw(image + i, PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
02785           }
02786         }
02787         EndSpriteCombine();
02788       }
02789 
02790       OffsetGroundSprite(31, 1);
02791       ti->z += ApplyPixelFoundationToSlope(FOUNDATION_LEVELED, &ti->tileh);
02792     } else {
02793 draw_default_foundation:
02794       DrawFoundation(ti, FOUNDATION_LEVELED);
02795     }
02796   }
02797 
02798   if (IsBuoy(ti->tile)) {
02799     DrawWaterClassGround(ti);
02800     SpriteID sprite = GetCanalSprite(CF_BUOY, ti->tile);
02801     if (sprite != 0) total_offset = sprite - SPR_IMG_BUOY;
02802   } else if (IsDock(ti->tile) || (IsOilRig(ti->tile) && IsTileOnWater(ti->tile))) {
02803     if (ti->tileh == SLOPE_FLAT) {
02804       DrawWaterClassGround(ti);
02805     } else {
02806       assert(IsDock(ti->tile));
02807       TileIndex water_tile = ti->tile + TileOffsByDiagDir(GetDockDirection(ti->tile));
02808       WaterClass wc = GetWaterClass(water_tile);
02809       if (wc == WATER_CLASS_SEA) {
02810         DrawShoreTile(ti->tileh);
02811       } else {
02812         DrawClearLandTile(ti, 3);
02813       }
02814     }
02815   } else {
02816     if (layout != NULL) {
02817       /* Sprite layout which needs preprocessing */
02818       bool separate_ground = HasBit(statspec->flags, SSF_SEPARATE_GROUND);
02819       uint32 var10_values = layout->PrepareLayout(total_offset, rti->fallback_railtype, 0, 0, separate_ground);
02820       uint8 var10;
02821       FOR_EACH_SET_BIT(var10, var10_values) {
02822         uint32 var10_relocation = GetCustomStationRelocation(statspec, st, ti->tile, var10);
02823         layout->ProcessRegisters(var10, var10_relocation, separate_ground);
02824       }
02825       tmp_rail_layout.seq = layout->GetLayout(&tmp_rail_layout.ground);
02826       t = &tmp_rail_layout;
02827       total_offset = 0;
02828     } else if (statspec != NULL) {
02829       /* Simple sprite layout */
02830       ground_relocation = relocation = GetCustomStationRelocation(statspec, st, ti->tile, 0);
02831       if (HasBit(statspec->flags, SSF_SEPARATE_GROUND)) {
02832         ground_relocation = GetCustomStationRelocation(statspec, st, ti->tile, 1);
02833       }
02834       ground_relocation += rti->fallback_railtype;
02835     }
02836 
02837     SpriteID image = t->ground.sprite;
02838     PaletteID pal  = t->ground.pal;
02839     RailTrackOffset overlay_offset;
02840     if (rti != NULL && rti->UsesOverlay() && SplitGroundSpriteForOverlay(ti, &image, &overlay_offset)) {
02841       SpriteID ground = GetCustomRailSprite(rti, ti->tile, RTSG_GROUND);
02842       DrawGroundSprite(image, PAL_NONE);
02843       DrawGroundSprite(ground + overlay_offset, PAL_NONE);
02844 
02845       if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasStationReservation(ti->tile)) {
02846         SpriteID overlay = GetCustomRailSprite(rti, ti->tile, RTSG_OVERLAY);
02847         DrawGroundSprite(overlay + overlay_offset, PALETTE_CRASH);
02848       }
02849     } else {
02850       image += HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE) ? ground_relocation : total_offset;
02851       if (HasBit(pal, SPRITE_MODIFIER_CUSTOM_SPRITE)) pal += ground_relocation;
02852       DrawGroundSprite(image, GroundSpritePaletteTransform(image, pal, palette));
02853 
02854       /* PBS debugging, draw reserved tracks darker */
02855       if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasStationRail(ti->tile) && HasStationReservation(ti->tile)) {
02856         const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
02857         DrawGroundSprite(GetRailStationAxis(ti->tile) == AXIS_X ? rti->base_sprites.single_x : rti->base_sprites.single_y, PALETTE_CRASH);
02858       }
02859     }
02860   }
02861 
02862   if (HasStationRail(ti->tile) && HasCatenaryDrawn(GetRailType(ti->tile))) DrawCatenary(ti);
02863 
02864   if (HasBit(roadtypes, ROADTYPE_TRAM)) {
02865     Axis axis = GetRoadStopDir(ti->tile) == DIAGDIR_NE ? AXIS_X : AXIS_Y;
02866     DrawGroundSprite((HasBit(roadtypes, ROADTYPE_ROAD) ? SPR_TRAMWAY_OVERLAY : SPR_TRAMWAY_TRAM) + (axis ^ 1), PAL_NONE);
02867     DrawTramCatenary(ti, axis == AXIS_X ? ROAD_X : ROAD_Y);
02868   }
02869 
02870   if (IsRailWaypoint(ti->tile)) {
02871     /* Don't offset the waypoint graphics; they're always the same. */
02872     total_offset = 0;
02873   }
02874 
02875   DrawRailTileSeq(ti, t, TO_BUILDINGS, total_offset, relocation, palette);
02876 }
02877 
02878 void StationPickerDrawSprite(int x, int y, StationType st, RailType railtype, RoadType roadtype, int image)
02879 {
02880   int32 total_offset = 0;
02881   PaletteID pal = COMPANY_SPRITE_COLOUR(_local_company);
02882   const DrawTileSprites *t = GetStationTileLayout(st, image);
02883   const RailtypeInfo *rti = NULL;
02884 
02885   if (railtype != INVALID_RAILTYPE) {
02886     rti = GetRailTypeInfo(railtype);
02887     total_offset = rti->GetRailtypeSpriteOffset();
02888   }
02889 
02890   SpriteID img = t->ground.sprite;
02891   RailTrackOffset overlay_offset;
02892   if (rti != NULL && rti->UsesOverlay() && SplitGroundSpriteForOverlay(NULL, &img, &overlay_offset)) {
02893     SpriteID ground = GetCustomRailSprite(rti, INVALID_TILE, RTSG_GROUND);
02894     DrawSprite(img, PAL_NONE, x, y);
02895     DrawSprite(ground + overlay_offset, PAL_NONE, x, y);
02896   } else {
02897     DrawSprite(img + total_offset, HasBit(img, PALETTE_MODIFIER_COLOUR) ? pal : PAL_NONE, x, y);
02898   }
02899 
02900   if (roadtype == ROADTYPE_TRAM) {
02901     DrawSprite(SPR_TRAMWAY_TRAM + (t->ground.sprite == SPR_ROAD_PAVED_STRAIGHT_X ? 1 : 0), PAL_NONE, x, y);
02902   }
02903 
02904   /* Default waypoint has no railtype specific sprites */
02905   DrawRailTileSeqInGUI(x, y, t, st == STATION_WAYPOINT ? 0 : total_offset, 0, pal);
02906 }
02907 
02908 static int GetSlopePixelZ_Station(TileIndex tile, uint x, uint y)
02909 {
02910   return GetTileMaxPixelZ(tile);
02911 }
02912 
02913 static Foundation GetFoundation_Station(TileIndex tile, Slope tileh)
02914 {
02915   return FlatteningFoundation(tileh);
02916 }
02917 
02918 static void GetTileDesc_Station(TileIndex tile, TileDesc *td)
02919 {
02920   td->owner[0] = GetTileOwner(tile);
02921   if (IsDriveThroughStopTile(tile)) {
02922     Owner road_owner = INVALID_OWNER;
02923     Owner tram_owner = INVALID_OWNER;
02924     RoadTypes rts = GetRoadTypes(tile);
02925     if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
02926     if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
02927 
02928     /* Is there a mix of owners? */
02929     if ((tram_owner != INVALID_OWNER && tram_owner != td->owner[0]) ||
02930         (road_owner != INVALID_OWNER && road_owner != td->owner[0])) {
02931       uint i = 1;
02932       if (road_owner != INVALID_OWNER) {
02933         td->owner_type[i] = STR_LAND_AREA_INFORMATION_ROAD_OWNER;
02934         td->owner[i] = road_owner;
02935         i++;
02936       }
02937       if (tram_owner != INVALID_OWNER) {
02938         td->owner_type[i] = STR_LAND_AREA_INFORMATION_TRAM_OWNER;
02939         td->owner[i] = tram_owner;
02940       }
02941     }
02942   }
02943   td->build_date = BaseStation::GetByTile(tile)->build_date;
02944 
02945   if (HasStationTileRail(tile)) {
02946     const StationSpec *spec = GetStationSpec(tile);
02947 
02948     if (spec != NULL) {
02949       td->station_class = StationClass::Get(spec->cls_id)->name;
02950       td->station_name  = spec->name;
02951 
02952       if (spec->grf_prop.grffile != NULL) {
02953         const GRFConfig *gc = GetGRFConfig(spec->grf_prop.grffile->grfid);
02954         td->grf = gc->GetName();
02955       }
02956     }
02957 
02958     const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(tile));
02959     td->rail_speed = rti->max_speed;
02960   }
02961 
02962   if (IsAirport(tile)) {
02963     const AirportSpec *as = Station::GetByTile(tile)->airport.GetSpec();
02964     td->airport_class = AirportClass::Get(as->cls_id)->name;
02965     td->airport_name = as->name;
02966 
02967     const AirportTileSpec *ats = AirportTileSpec::GetByTile(tile);
02968     td->airport_tile_name = ats->name;
02969 
02970     if (as->grf_prop.grffile != NULL) {
02971       const GRFConfig *gc = GetGRFConfig(as->grf_prop.grffile->grfid);
02972       td->grf = gc->GetName();
02973     } else if (ats->grf_prop.grffile != NULL) {
02974       const GRFConfig *gc = GetGRFConfig(ats->grf_prop.grffile->grfid);
02975       td->grf = gc->GetName();
02976     }
02977   }
02978 
02979   StringID str;
02980   switch (GetStationType(tile)) {
02981     default: NOT_REACHED();
02982     case STATION_RAIL:     str = STR_LAI_STATION_DESCRIPTION_RAILROAD_STATION; break;
02983     case STATION_AIRPORT:
02984       str = (IsHangar(tile) ? STR_LAI_STATION_DESCRIPTION_AIRCRAFT_HANGAR : STR_LAI_STATION_DESCRIPTION_AIRPORT);
02985       break;
02986     case STATION_TRUCK:    str = STR_LAI_STATION_DESCRIPTION_TRUCK_LOADING_AREA; break;
02987     case STATION_BUS:      str = STR_LAI_STATION_DESCRIPTION_BUS_STATION; break;
02988     case STATION_OILRIG:   str = STR_INDUSTRY_NAME_OIL_RIG; break;
02989     case STATION_DOCK:     str = STR_LAI_STATION_DESCRIPTION_SHIP_DOCK; break;
02990     case STATION_BUOY:     str = STR_LAI_STATION_DESCRIPTION_BUOY; break;
02991     case STATION_WAYPOINT: str = STR_LAI_STATION_DESCRIPTION_WAYPOINT; break;
02992   }
02993   td->str = str;
02994 }
02995 
02996 
02997 static TrackStatus GetTileTrackStatus_Station(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
02998 {
02999   TrackBits trackbits = TRACK_BIT_NONE;
03000 
03001   switch (mode) {
03002     case TRANSPORT_RAIL:
03003       if (HasStationRail(tile) && !IsStationTileBlocked(tile)) {
03004         trackbits = TrackToTrackBits(GetRailStationTrack(tile));
03005       }
03006       break;
03007 
03008     case TRANSPORT_WATER:
03009       /* buoy is coded as a station, it is always on open water */
03010       if (IsBuoy(tile)) {
03011         trackbits = TRACK_BIT_ALL;
03012         /* remove tracks that connect NE map edge */
03013         if (TileX(tile) == 0) trackbits &= ~(TRACK_BIT_X | TRACK_BIT_UPPER | TRACK_BIT_RIGHT);
03014         /* remove tracks that connect NW map edge */
03015         if (TileY(tile) == 0) trackbits &= ~(TRACK_BIT_Y | TRACK_BIT_LEFT | TRACK_BIT_UPPER);
03016       }
03017       break;
03018 
03019     case TRANSPORT_ROAD:
03020       if ((GetRoadTypes(tile) & sub_mode) != 0 && IsRoadStop(tile)) {
03021         DiagDirection dir = GetRoadStopDir(tile);
03022         Axis axis = DiagDirToAxis(dir);
03023 
03024         if (side != INVALID_DIAGDIR) {
03025           if (axis != DiagDirToAxis(side) || (IsStandardRoadStopTile(tile) && dir != side)) break;
03026         }
03027 
03028         trackbits = AxisToTrackBits(axis);
03029       }
03030       break;
03031 
03032     default:
03033       break;
03034   }
03035 
03036   return CombineTrackStatus(TrackBitsToTrackdirBits(trackbits), TRACKDIR_BIT_NONE);
03037 }
03038 
03039 
03040 static void TileLoop_Station(TileIndex tile)
03041 {
03042   /* FIXME -- GetTileTrackStatus_Station -> animated stationtiles
03043    * hardcoded.....not good */
03044   switch (GetStationType(tile)) {
03045     case STATION_AIRPORT:
03046       AirportTileAnimationTrigger(Station::GetByTile(tile), tile, AAT_TILELOOP);
03047       break;
03048 
03049     case STATION_DOCK:
03050       if (GetTileSlope(tile) != SLOPE_FLAT) break; // only handle water part
03051       /* FALL THROUGH */
03052     case STATION_OILRIG: //(station part)
03053     case STATION_BUOY:
03054       TileLoop_Water(tile);
03055       break;
03056 
03057     default: break;
03058   }
03059 }
03060 
03061 
03062 static void AnimateTile_Station(TileIndex tile)
03063 {
03064   if (HasStationRail(tile)) {
03065     AnimateStationTile(tile);
03066     return;
03067   }
03068 
03069   if (IsAirport(tile)) {
03070     AnimateAirportTile(tile);
03071   }
03072 }
03073 
03074 
03075 static bool ClickTile_Station(TileIndex tile)
03076 {
03077   const BaseStation *bst = BaseStation::GetByTile(tile);
03078 
03079   if (bst->facilities & FACIL_WAYPOINT) {
03080     ShowWaypointWindow(Waypoint::From(bst));
03081   } else if (IsHangar(tile)) {
03082     const Station *st = Station::From(bst);
03083     ShowDepotWindow(st->airport.GetHangarTile(st->airport.GetHangarNum(tile)), VEH_AIRCRAFT);
03084   } else {
03085     ShowStationViewWindow(bst->index);
03086   }
03087   return true;
03088 }
03089 
03090 static VehicleEnterTileStatus VehicleEnter_Station(Vehicle *v, TileIndex tile, int x, int y)
03091 {
03092   if (v->type == VEH_TRAIN) {
03093     StationID station_id = GetStationIndex(tile);
03094     if (!v->current_order.ShouldStopAtStation(v, station_id)) return VETSB_CONTINUE;
03095     if (!IsRailStation(tile) || !v->IsFrontEngine()) return VETSB_CONTINUE;
03096 
03097     int station_ahead;
03098     int station_length;
03099     int stop = GetTrainStopLocation(station_id, tile, Train::From(v), &station_ahead, &station_length);
03100 
03101     /* Stop whenever that amount of station ahead + the distance from the
03102      * begin of the platform to the stop location is longer than the length
03103      * of the platform. Station ahead 'includes' the current tile where the
03104      * vehicle is on, so we need to subtract that. */
03105     if (!IsInsideBS(stop + station_ahead, station_length, TILE_SIZE)) return VETSB_CONTINUE;
03106 
03107     DiagDirection dir = DirToDiagDir(v->direction);
03108 
03109     x &= 0xF;
03110     y &= 0xF;
03111 
03112     if (DiagDirToAxis(dir) != AXIS_X) Swap(x, y);
03113     if (y == TILE_SIZE / 2) {
03114       if (dir != DIAGDIR_SE && dir != DIAGDIR_SW) x = TILE_SIZE - 1 - x;
03115       stop &= TILE_SIZE - 1;
03116 
03117       if (x == stop) return VETSB_ENTERED_STATION | (VehicleEnterTileStatus)(station_id << VETS_STATION_ID_OFFSET); // enter station
03118       if (x < stop) {
03119         uint16 spd;
03120 
03121         v->vehstatus |= VS_TRAIN_SLOWING;
03122         spd = max(0, (stop - x) * 20 - 15);
03123         if (spd < v->cur_speed) v->cur_speed = spd;
03124       }
03125     }
03126   } else if (v->type == VEH_ROAD) {
03127     RoadVehicle *rv = RoadVehicle::From(v);
03128     if (rv->state < RVSB_IN_ROAD_STOP && !IsReversingRoadTrackdir((Trackdir)rv->state) && rv->frame == 0) {
03129       if (IsRoadStop(tile) && rv->IsFrontEngine()) {
03130         /* Attempt to allocate a parking bay in a road stop */
03131         return RoadStop::GetByTile(tile, GetRoadStopType(tile))->Enter(rv) ? VETSB_CONTINUE : VETSB_CANNOT_ENTER;
03132       }
03133     }
03134   }
03135 
03136   return VETSB_CONTINUE;
03137 }
03138 
03143 void TriggerWatchedCargoCallbacks(Station *st)
03144 {
03145   /* Collect cargoes accepted since the last big tick. */
03146   uint cargoes = 0;
03147   for (CargoID cid = 0; cid < NUM_CARGO; cid++) {
03148     if (HasBit(st->goods[cid].acceptance_pickup, GoodsEntry::GES_ACCEPTED_BIGTICK)) SetBit(cargoes, cid);
03149   }
03150 
03151   /* Anything to do? */
03152   if (cargoes == 0) return;
03153 
03154   /* Loop over all houses in the catchment. */
03155   Rect r = st->GetCatchmentRect();
03156   TileArea ta(TileXY(r.left, r.top), TileXY(r.right, r.bottom));
03157   TILE_AREA_LOOP(tile, ta) {
03158     if (IsTileType(tile, MP_HOUSE)) {
03159       WatchedCargoCallback(tile, cargoes);
03160     }
03161   }
03162 }
03163 
03170 static bool StationHandleBigTick(BaseStation *st)
03171 {
03172   if (!st->IsInUse()) {
03173     if (++st->delete_ctr >= 8) delete st;
03174     return false;
03175   }
03176 
03177   if (Station::IsExpected(st)) {
03178     TriggerWatchedCargoCallbacks(Station::From(st));
03179 
03180     for (CargoID i = 0; i < NUM_CARGO; i++) {
03181       ClrBit(Station::From(st)->goods[i].acceptance_pickup, GoodsEntry::GES_ACCEPTED_BIGTICK);
03182     }
03183   }
03184 
03185 
03186   if ((st->facilities & FACIL_WAYPOINT) == 0) UpdateStationAcceptance(Station::From(st), true);
03187 
03188   return true;
03189 }
03190 
03191 static inline void byte_inc_sat(byte *p)
03192 {
03193   byte b = *p + 1;
03194   if (b != 0) *p = b;
03195 }
03196 
03197 static void UpdateStationRating(Station *st)
03198 {
03199   bool waiting_changed = false;
03200 
03201   byte_inc_sat(&st->time_since_load);
03202   byte_inc_sat(&st->time_since_unload);
03203 
03204   const CargoSpec *cs;
03205   FOR_ALL_CARGOSPECS(cs) {
03206     GoodsEntry *ge = &st->goods[cs->Index()];
03207     /* Slowly increase the rating back to his original level in the case we
03208      *  didn't deliver cargo yet to this station. This happens when a bribe
03209      *  failed while you didn't moved that cargo yet to a station. */
03210     if (!HasBit(ge->acceptance_pickup, GoodsEntry::GES_PICKUP) && ge->rating < INITIAL_STATION_RATING) {
03211       ge->rating++;
03212     }
03213 
03214     /* Only change the rating if we are moving this cargo */
03215     if (HasBit(ge->acceptance_pickup, GoodsEntry::GES_PICKUP)) {
03216       byte_inc_sat(&ge->time_since_pickup);
03217 
03218       bool skip = false;
03219       int rating = 0;
03220       uint waiting = ge->cargo.Count();
03221 
03222       /* num_dests is at least 1 if there is any cargo as
03223        * INVALID_STATION is also a destination.
03224        */
03225       uint num_dests = (uint)ge->cargo.Packets()->MapSize();
03226 
03227       /* Average amount of cargo per next hop, but prefer solitary stations
03228        * with only one or two next hops. They are allowed to have more
03229        * cargo waiting per next hop.
03230        * With manual cargo distribution waiting_avg = waiting / 2 as then
03231        * INVALID_STATION is the only destination.
03232        */
03233       uint waiting_avg = waiting / (num_dests + 1);
03234 
03235       if (HasBit(cs->callback_mask, CBM_CARGO_STATION_RATING_CALC)) {
03236         /* Perform custom station rating. If it succeeds the speed, days in transit and
03237          * waiting cargo ratings must not be executed. */
03238 
03239         /* NewGRFs expect last speed to be 0xFF when no vehicle has arrived yet. */
03240         uint last_speed = ge->HasVehicleEverTriedLoading() ? ge->last_speed : 0xFF;
03241 
03242         uint32 var18 = min(ge->time_since_pickup, 0xFF) | (min(ge->max_waiting_cargo, 0xFFFF) << 8) | (min(last_speed, 0xFF) << 24);
03243         /* Convert to the 'old' vehicle types */
03244         uint32 var10 = (st->last_vehicle_type == VEH_INVALID) ? 0x0 : (st->last_vehicle_type + 0x10);
03245         uint16 callback = GetCargoCallback(CBID_CARGO_STATION_RATING_CALC, var10, var18, cs);
03246         if (callback != CALLBACK_FAILED) {
03247           skip = true;
03248           rating = GB(callback, 0, 14);
03249 
03250           /* Simulate a 15 bit signed value */
03251           if (HasBit(callback, 14)) rating -= 0x4000;
03252         }
03253       }
03254 
03255       if (!skip) {
03256         int b = ge->last_speed - 85;
03257         if (b >= 0) rating += b >> 2;
03258 
03259         byte waittime = ge->time_since_pickup;
03260         if (st->last_vehicle_type == VEH_SHIP) waittime >>= 2;
03261         (waittime > 21) ||
03262         (rating += 25, waittime > 12) ||
03263         (rating += 25, waittime > 6) ||
03264         (rating += 45, waittime > 3) ||
03265         (rating += 35, true);
03266 
03267         (rating -= 90, ge->max_waiting_cargo > 1500) ||
03268         (rating += 55, ge->max_waiting_cargo > 1000) ||
03269         (rating += 35, ge->max_waiting_cargo > 600) ||
03270         (rating += 10, ge->max_waiting_cargo > 300) ||
03271         (rating += 20, ge->max_waiting_cargo > 100) ||
03272         (rating += 10, true);
03273       }
03274 
03275       if (Company::IsValidID(st->owner) && HasBit(st->town->statues, st->owner)) rating += 26;
03276 
03277       byte age = ge->last_age;
03278       (age >= 3) ||
03279       (rating += 10, age >= 2) ||
03280       (rating += 10, age >= 1) ||
03281       (rating += 13, true);
03282 
03283       {
03284         int or_ = ge->rating; // old rating
03285 
03286         /* only modify rating in steps of -2, -1, 0, 1 or 2 */
03287         ge->rating = rating = or_ + Clamp(Clamp(rating, 0, 255) - or_, -2, 2);
03288 
03289         /* if rating is <= 64 and more than 100 items waiting on average per destination,
03290          * remove some random amount of goods from the station */
03291         if (rating <= 64 && waiting_avg >= 100) {
03292           int dec = Random() & 0x1F;
03293           if (waiting_avg < 200) dec &= 7;
03294           waiting -= (dec + 1) * num_dests;
03295           waiting_changed = true;
03296         }
03297 
03298         /* if rating is <= 127 and there are any items waiting, maybe remove some goods. */
03299         if (rating <= 127 && waiting != 0) {
03300           uint32 r = Random();
03301           if (rating <= (int)GB(r, 0, 7)) {
03302             /* Need to have int, otherwise it will just overflow etc. */
03303             waiting = max((int)waiting - (int)((GB(r, 8, 2) - 1) * num_dests), 0);
03304             waiting_changed = true;
03305           }
03306         }
03307 
03308         /* At some point we really must cap the cargo. Previously this
03309          * was a strict 4095, but now we'll have a less strict, but
03310          * increasingly aggressive truncation of the amount of cargo. */
03311         static const uint WAITING_CARGO_THRESHOLD  = 1 << 12;
03312         static const uint WAITING_CARGO_CUT_FACTOR = 1 <<  6;
03313         static const uint MAX_WAITING_CARGO        = 1 << 15;
03314 
03315         if (waiting > WAITING_CARGO_THRESHOLD) {
03316           uint difference = waiting - WAITING_CARGO_THRESHOLD;
03317           waiting -= (difference / WAITING_CARGO_CUT_FACTOR);
03318 
03319           waiting = min(waiting, MAX_WAITING_CARGO);
03320           waiting_changed = true;
03321         }
03322 
03323         if (waiting_changed && waiting < ge->cargo.Count()) {
03324           /* Feed back the exact own waiting cargo at this station for the
03325            * next rating calculation. */
03326           ge->max_waiting_cargo = 0;
03327 
03328           /* If truncating also punish the source stations' ratings to
03329            * decrease the flow of incoming cargo. */
03330 
03331           StationCargoAmountMap waiting_per_source;
03332           ge->cargo.Truncate(ge->cargo.Count() - waiting, &waiting_per_source);
03333           for (StationCargoAmountMap::iterator i(waiting_per_source.begin()); i != waiting_per_source.end(); ++i) {
03334             Station *source_station = Station::GetIfValid(i->first);
03335             if (source_station == NULL) continue;
03336 
03337             GoodsEntry &source_ge = source_station->goods[cs->Index()];
03338             source_ge.max_waiting_cargo = max(source_ge.max_waiting_cargo, i->second);
03339           }
03340         } else {
03341           /* If the average number per next hop is low, be more forgiving. */
03342           ge->max_waiting_cargo = waiting_avg;
03343         }
03344       }
03345     }
03346   }
03347 
03348   StationID index = st->index;
03349   if (waiting_changed) {
03350     SetWindowDirty(WC_STATION_VIEW, index); // update whole window
03351   } else {
03352     SetWindowWidgetDirty(WC_STATION_VIEW, index, WID_SV_ACCEPT_RATING_LIST); // update only ratings list
03353   }
03354 }
03355 
03362 void DeleteStaleFlows(StationID at, CargoID c_id, StationID to)
03363 {
03364   FlowStatMap &flows = Station::Get(at)->goods[c_id].flows;
03365   for (FlowStatMap::iterator f_it = flows.begin(); f_it != flows.end();) {
03366     FlowStat &s_flows = f_it->second;
03367     s_flows.EraseShare(to);
03368     if (s_flows.GetShares()->empty()) {
03369       flows.erase(f_it++);
03370     } else {
03371       ++f_it;
03372     }
03373   }
03374 }
03375 
03382 uint GetMovingAverageLength(const Station *from, const Station *to)
03383 {
03384   return LinkStat::MIN_DISTANCE + (DistanceManhattan(from->xy, to->xy) >> 2);
03385 }
03386 
03390 void Station::RunAverages()
03391 {
03392   for (int goods_index = 0; goods_index < NUM_CARGO; ++goods_index) {
03393     GoodsEntry *ge = &this->goods[goods_index];
03394     for (LinkStatMap::iterator i = ge->link_stats.begin(); i != ge->link_stats.end();) {
03395       StationID id = i->first;
03396       if (Station::IsValidID(id)) {
03397         i->second.Decrease();
03398         if (i->second.IsValid()) {
03399           ++i;
03400         } else {
03401           DeleteStaleFlows(this->index, goods_index, id);
03402           ge->cargo.Reroute(UINT_MAX, &ge->cargo, id, this->index, ge);
03403           ge->link_stats.erase(i++);
03404         }
03405       } else {
03406         ge->cargo.Reroute(UINT_MAX, &ge->cargo, id, this->index, ge);
03407         ge->link_stats.erase(i++);
03408       }
03409     }
03410 
03411     if (_settings_game.linkgraph.GetDistributionType(goods_index) == DT_MANUAL) {
03412       ge->flows.clear();
03413     }
03414   }
03415 }
03416 
03425 void IncreaseStats(Station *st, CargoID cargo, StationID next_station_id, uint capacity, uint usage)
03426 {
03427   LinkStatMap &stats = st->goods[cargo].link_stats;
03428   LinkStatMap::iterator i = stats.find(next_station_id);
03429   if (i == stats.end()) {
03430     assert(st->index != next_station_id);
03431     stats.insert(std::make_pair(next_station_id, LinkStat(
03432         GetMovingAverageLength(st, Station::Get(next_station_id)),
03433         capacity, usage == UINT_MAX ? 0 : usage)));
03434   } else {
03435     if (usage == UINT_MAX) {
03436       i->second.Refresh(capacity);
03437     } else {
03438       assert(capacity >= usage);
03439       i->second.Increase(capacity, usage);
03440     }
03441     assert(i->second.IsValid());
03442   }
03443 }
03444 
03451 void IncreaseStats(Station *st, const Vehicle *front, StationID next_station_id)
03452 {
03453   for (const Vehicle *v = front; v != NULL; v = v->Next()) {
03454     if (v->refit_cap > 0) {
03455       /* The cargo count can indeed be higher than the refit_cap if
03456        * wagons have been auto-replaced and subsequently auto-
03457        * refitted to a higher capacity. The cargo gets redistributed
03458        * among the wagons in that case.
03459        * As usage is not such an important figure anyway we just
03460        * ignore the additional cargo then.*/
03461       IncreaseStats(st, v->cargo_type, next_station_id, v->refit_cap,
03462         min(v->refit_cap, v->cargo.Count()));
03463     }
03464   }
03465 }
03466 
03467 /* called for every station each tick */
03468 static void StationHandleSmallTick(BaseStation *st)
03469 {
03470   if ((st->facilities & FACIL_WAYPOINT) != 0 || !st->IsInUse()) return;
03471 
03472   byte b = st->delete_ctr + 1;
03473   if (b >= STATION_RATING_TICKS) b = 0;
03474   st->delete_ctr = b;
03475 
03476   if (b == 0) UpdateStationRating(Station::From(st));
03477 }
03478 
03479 void OnTick_Station()
03480 {
03481   if (_game_mode == GM_EDITOR) return;
03482 
03483   /* Everytime the tick counter overflows a some stations are skipped because
03484    * 65536 is not divisible by 74. We don't care as the averages aren't very
03485    * accurate anyway.
03486    */
03487   for (uint id = _tick_counter % DAY_TICKS; id < Station::GetPoolSize(); id += DAY_TICKS) {
03488     Station *item = Station::GetIfValid(id);
03489     if (item != NULL) item->RunAverages();
03490   }
03491 
03492   BaseStation *st;
03493   FOR_ALL_BASE_STATIONS(st) {
03494     StationHandleSmallTick(st);
03495 
03496     /* Run STATION_ACCEPTANCE_TICKS = 250 tick interval trigger for station animation.
03497      * Station index is included so that triggers are not all done
03498      * at the same time. */
03499     if ((_tick_counter + st->index) % STATION_ACCEPTANCE_TICKS == 0) {
03500       /* Stop processing this station if it was deleted */
03501       if (!StationHandleBigTick(st)) continue;
03502       TriggerStationAnimation(st, st->xy, SAT_250_TICKS);
03503       if (Station::IsExpected(st)) AirportAnimationTrigger(Station::From(st), AAT_STATION_250_TICKS);
03504     }
03505   }
03506 }
03507 
03509 void StationMonthlyLoop()
03510 {
03511   Station *st;
03512 
03513   FOR_ALL_STATIONS(st) {
03514     for (CargoID i = 0; i < NUM_CARGO; i++) {
03515       GoodsEntry *ge = &st->goods[i];
03516       SB(ge->acceptance_pickup, GoodsEntry::GES_LAST_MONTH, 1, GB(ge->acceptance_pickup, GoodsEntry::GES_CURRENT_MONTH, 1));
03517       ClrBit(ge->acceptance_pickup, GoodsEntry::GES_CURRENT_MONTH);
03518       ge->supply = ge->supply_new;
03519       ge->supply_new = 0;
03520     }
03521   }
03522 }
03523 
03524 
03525 void ModifyStationRatingAround(TileIndex tile, Owner owner, int amount, uint radius)
03526 {
03527   Station *st;
03528 
03529   FOR_ALL_STATIONS(st) {
03530     if (st->owner == owner &&
03531         DistanceManhattan(tile, st->xy) <= radius) {
03532       for (CargoID i = 0; i < NUM_CARGO; i++) {
03533         GoodsEntry *ge = &st->goods[i];
03534 
03535         if (ge->acceptance_pickup != 0) {
03536           ge->rating = Clamp(ge->rating + amount, 0, 255);
03537         }
03538       }
03539     }
03540   }
03541 }
03542 
03543 static uint UpdateStationWaiting(Station *st, CargoID type, uint amount, SourceType source_type, SourceID source_id)
03544 {
03545   /* We can't allocate a CargoPacket? Then don't do anything
03546    * at all; i.e. just discard the incoming cargo. */
03547   if (!CargoPacket::CanAllocateItem()) return 0;
03548 
03549   GoodsEntry &ge = st->goods[type];
03550   amount += ge.amount_fract;
03551   ge.amount_fract = GB(amount, 0, 8);
03552 
03553   amount >>= 8;
03554   /* No new "real" cargo item yet. */
03555   if (amount == 0) return 0;
03556 
03557   StationID next = ge.GetVia(st->index);
03558 
03559   ge.cargo.Append(new CargoPacket(st->index, st->xy, amount, source_type, source_id), next);
03560   ge.supply_new += amount;
03561 
03562   if (!HasBit(ge.acceptance_pickup, GoodsEntry::GES_PICKUP)) {
03563     InvalidateWindowData(WC_STATION_LIST, st->index);
03564     SetBit(ge.acceptance_pickup, GoodsEntry::GES_PICKUP);
03565   }
03566 
03567   TriggerStationRandomisation(st, st->xy, SRT_NEW_CARGO, type);
03568   TriggerStationAnimation(st, st->xy, SAT_NEW_CARGO, type);
03569   AirportAnimationTrigger(st, AAT_STATION_NEW_CARGO, type);
03570 
03571   SetWindowDirty(WC_STATION_VIEW, st->index);
03572   st->MarkTilesDirty(true);
03573   return amount;
03574 }
03575 
03576 static bool IsUniqueStationName(const char *name)
03577 {
03578   const Station *st;
03579 
03580   FOR_ALL_STATIONS(st) {
03581     if (st->name != NULL && strcmp(st->name, name) == 0) return false;
03582   }
03583 
03584   return true;
03585 }
03586 
03596 CommandCost CmdRenameStation(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
03597 {
03598   Station *st = Station::GetIfValid(p1);
03599   if (st == NULL) return CMD_ERROR;
03600 
03601   CommandCost ret = CheckOwnership(st->owner);
03602   if (ret.Failed()) return ret;
03603 
03604   bool reset = StrEmpty(text);
03605 
03606   if (!reset) {
03607     if (Utf8StringLength(text) >= MAX_LENGTH_STATION_NAME_CHARS) return CMD_ERROR;
03608     if (!IsUniqueStationName(text)) return_cmd_error(STR_ERROR_NAME_MUST_BE_UNIQUE);
03609   }
03610 
03611   if (flags & DC_EXEC) {
03612     free(st->name);
03613     st->name = reset ? NULL : strdup(text);
03614 
03615     st->UpdateVirtCoord();
03616     InvalidateWindowData(WC_STATION_LIST, st->owner, 1);
03617   }
03618 
03619   return CommandCost();
03620 }
03621 
03628 void FindStationsAroundTiles(const TileArea &location, StationList *stations)
03629 {
03630   /* area to search = producer plus station catchment radius */
03631   uint max_rad = (_settings_game.station.modified_catchment ? MAX_CATCHMENT : CA_UNMODIFIED);
03632 
03633   uint x = TileX(location.tile);
03634   uint y = TileY(location.tile);
03635 
03636   uint min_x = (x > max_rad) ? x - max_rad : 0;
03637   uint max_x = x + location.w + max_rad;
03638   uint min_y = (y > max_rad) ? y - max_rad : 0;
03639   uint max_y = y + location.h + max_rad;
03640 
03641   if (min_x == 0 && _settings_game.construction.freeform_edges) min_x = 1;
03642   if (min_y == 0 && _settings_game.construction.freeform_edges) min_y = 1;
03643   if (max_x >= MapSizeX()) max_x = MapSizeX() - 1;
03644   if (max_y >= MapSizeY()) max_y = MapSizeY() - 1;
03645 
03646   for (uint cy = min_y; cy < max_y; cy++) {
03647     for (uint cx = min_x; cx < max_x; cx++) {
03648       TileIndex cur_tile = TileXY(cx, cy);
03649       if (!IsTileType(cur_tile, MP_STATION)) continue;
03650 
03651       Station *st = Station::GetByTile(cur_tile);
03652       /* st can be NULL in case of waypoints */
03653       if (st == NULL) continue;
03654 
03655       if (_settings_game.station.modified_catchment) {
03656         int rad = st->GetCatchmentRadius();
03657         int rad_x = cx - x;
03658         int rad_y = cy - y;
03659 
03660         if (rad_x < -rad || rad_x >= rad + location.w) continue;
03661         if (rad_y < -rad || rad_y >= rad + location.h) continue;
03662       }
03663 
03664       /* Insert the station in the set. This will fail if it has
03665        * already been added.
03666        */
03667       stations->Include(st);
03668     }
03669   }
03670 }
03671 
03676 const StationList *StationFinder::GetStations()
03677 {
03678   if (this->tile != INVALID_TILE) {
03679     FindStationsAroundTiles(*this, &this->stations);
03680     this->tile = INVALID_TILE;
03681   }
03682   return &this->stations;
03683 }
03684 
03685 uint MoveGoodsToStation(CargoID type, uint amount, SourceType source_type, SourceID source_id, const StationList *all_stations)
03686 {
03687   /* Return if nothing to do. Also the rounding below fails for 0. */
03688   if (amount == 0) return 0;
03689 
03690   Station *st1 = NULL;   // Station with best rating
03691   Station *st2 = NULL;   // Second best station
03692   uint best_rating1 = 0; // rating of st1
03693   uint best_rating2 = 0; // rating of st2
03694 
03695   for (Station * const *st_iter = all_stations->Begin(); st_iter != all_stations->End(); ++st_iter) {
03696     Station *st = *st_iter;
03697 
03698     /* Is the station reserved exclusively for somebody else? */
03699     if (st->town->exclusive_counter > 0 && st->town->exclusivity != st->owner) continue;
03700 
03701     if (st->goods[type].rating == 0) continue; // Lowest possible rating, better not to give cargo anymore
03702 
03703     if (_settings_game.order.selectgoods && !st->goods[type].HasVehicleEverTriedLoading()) continue; // Selectively servicing stations, and not this one
03704 
03705     if (IsCargoInClass(type, CC_PASSENGERS)) {
03706       if (st->facilities == FACIL_TRUCK_STOP) continue; // passengers are never served by just a truck stop
03707     } else {
03708       if (st->facilities == FACIL_BUS_STOP) continue; // non-passengers are never served by just a bus stop
03709     }
03710 
03711     /* This station can be used, add it to st1/st2 */
03712     if (st1 == NULL || st->goods[type].rating >= best_rating1) {
03713       st2 = st1; best_rating2 = best_rating1; st1 = st; best_rating1 = st->goods[type].rating;
03714     } else if (st2 == NULL || st->goods[type].rating >= best_rating2) {
03715       st2 = st; best_rating2 = st->goods[type].rating;
03716     }
03717   }
03718 
03719   /* no stations around at all? */
03720   if (st1 == NULL) return 0;
03721 
03722   /* From now we'll calculate with fractal cargo amounts.
03723    * First determine how much cargo we really have. */
03724   amount *= best_rating1 + 1;
03725 
03726   if (st2 == NULL) {
03727     /* only one station around */
03728     return UpdateStationWaiting(st1, type, amount, source_type, source_id);
03729   }
03730 
03731   /* several stations around, the best two (highest rating) are in st1 and st2 */
03732   assert(st1 != NULL);
03733   assert(st2 != NULL);
03734   assert(best_rating1 != 0 || best_rating2 != 0);
03735 
03736   /* Then determine the amount the worst station gets. We do it this way as the
03737    * best should get a bonus, which in this case is the rounding difference from
03738    * this calculation. In reality that will mean the bonus will be pretty low.
03739    * Nevertheless, the best station should always get the most cargo regardless
03740    * of rounding issues. */
03741   uint worst_cargo = amount * best_rating2 / (best_rating1 + best_rating2);
03742   assert(worst_cargo <= (amount - worst_cargo));
03743 
03744   /* And then send the cargo to the stations! */
03745   uint moved = UpdateStationWaiting(st1, type, amount - worst_cargo, source_type, source_id);
03746   /* These two UpdateStationWaiting's can't be in the statement as then the order
03747    * of execution would be undefined and that could cause desyncs with callbacks. */
03748   return moved + UpdateStationWaiting(st2, type, worst_cargo, source_type, source_id);
03749 }
03750 
03751 void BuildOilRig(TileIndex tile)
03752 {
03753   if (!Station::CanAllocateItem()) {
03754     DEBUG(misc, 0, "Can't allocate station for oilrig at 0x%X, reverting to oilrig only", tile);
03755     return;
03756   }
03757 
03758   Station *st = new Station(tile);
03759   st->town = ClosestTownFromTile(tile, UINT_MAX);
03760 
03761   st->string_id = GenerateStationName(st, tile, STATIONNAMING_OILRIG);
03762 
03763   assert(IsTileType(tile, MP_INDUSTRY));
03764   DeleteAnimatedTile(tile);
03765   MakeOilrig(tile, st->index, GetWaterClass(tile));
03766 
03767   st->owner = OWNER_NONE;
03768   st->airport.type = AT_OILRIG;
03769   st->airport.Add(tile);
03770   st->dock_tile = tile;
03771   st->facilities = FACIL_AIRPORT | FACIL_DOCK;
03772   st->build_date = _date;
03773 
03774   st->rect.BeforeAddTile(tile, StationRect::ADD_FORCE);
03775 
03776   st->UpdateVirtCoord();
03777   UpdateStationAcceptance(st, false);
03778   st->RecomputeIndustriesNear();
03779 }
03780 
03781 void DeleteOilRig(TileIndex tile)
03782 {
03783   Station *st = Station::GetByTile(tile);
03784 
03785   MakeWaterKeepingClass(tile, OWNER_NONE);
03786 
03787   st->dock_tile = INVALID_TILE;
03788   st->airport.Clear();
03789   st->facilities &= ~(FACIL_AIRPORT | FACIL_DOCK);
03790   st->airport.flags = 0;
03791 
03792   st->rect.AfterRemoveTile(st, tile);
03793 
03794   st->UpdateVirtCoord();
03795   st->RecomputeIndustriesNear();
03796   if (!st->IsInUse()) delete st;
03797 }
03798 
03799 static void ChangeTileOwner_Station(TileIndex tile, Owner old_owner, Owner new_owner)
03800 {
03801   if (IsRoadStopTile(tile)) {
03802     for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
03803       /* Update all roadtypes, no matter if they are present */
03804       if (GetRoadOwner(tile, rt) == old_owner) {
03805         if (HasTileRoadType(tile, rt)) {
03806           /* A drive-through road-stop has always two road bits. No need to dirty windows here, we'll redraw the whole screen anyway. */
03807           Company::Get(old_owner)->infrastructure.road[rt] -= 2;
03808           if (new_owner != INVALID_OWNER) Company::Get(new_owner)->infrastructure.road[rt] += 2;
03809         }
03810         SetRoadOwner(tile, rt, new_owner == INVALID_OWNER ? OWNER_NONE : new_owner);
03811       }
03812     }
03813   }
03814 
03815   if (!IsTileOwner(tile, old_owner)) return;
03816 
03817   if (new_owner != INVALID_OWNER) {
03818     /* Update company infrastructure counts. Only do it here
03819      * if the new owner is valid as otherwise the clear
03820      * command will do it for us. No need to dirty windows
03821      * here, we'll redraw the whole screen anyway.*/
03822     Company *old_company = Company::Get(old_owner);
03823     Company *new_company = Company::Get(new_owner);
03824 
03825     /* Update counts for underlying infrastructure. */
03826     switch (GetStationType(tile)) {
03827       case STATION_RAIL:
03828       case STATION_WAYPOINT:
03829         if (!IsStationTileBlocked(tile)) {
03830           old_company->infrastructure.rail[GetRailType(tile)]--;
03831           new_company->infrastructure.rail[GetRailType(tile)]++;
03832         }
03833         break;
03834 
03835       case STATION_BUS:
03836       case STATION_TRUCK:
03837         /* Road stops were already handled above. */
03838         break;
03839 
03840       case STATION_BUOY:
03841       case STATION_DOCK:
03842         if (GetWaterClass(tile) == WATER_CLASS_CANAL) {
03843           old_company->infrastructure.water--;
03844           new_company->infrastructure.water++;
03845         }
03846         break;
03847 
03848       default:
03849         break;
03850     }
03851 
03852     /* Update station tile count. */
03853     if (!IsBuoy(tile) && !IsAirport(tile)) {
03854       old_company->infrastructure.station--;
03855       new_company->infrastructure.station++;
03856     }
03857 
03858     /* for buoys, owner of tile is owner of water, st->owner == OWNER_NONE */
03859     SetTileOwner(tile, new_owner);
03860     InvalidateWindowClassesData(WC_STATION_LIST, 0);
03861   } else {
03862     if (IsDriveThroughStopTile(tile)) {
03863       /* Remove the drive-through road stop */
03864       DoCommand(tile, 1 | 1 << 8, (GetStationType(tile) == STATION_TRUCK) ? ROADSTOP_TRUCK : ROADSTOP_BUS, DC_EXEC | DC_BANKRUPT, CMD_REMOVE_ROAD_STOP);
03865       assert(IsTileType(tile, MP_ROAD));
03866       /* Change owner of tile and all roadtypes */
03867       ChangeTileOwner(tile, old_owner, new_owner);
03868     } else {
03869       DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR);
03870       /* Set tile owner of water under (now removed) buoy and dock to OWNER_NONE.
03871        * Update owner of buoy if it was not removed (was in orders).
03872        * Do not update when owned by OWNER_WATER (sea and rivers). */
03873       if ((IsTileType(tile, MP_WATER) || IsBuoyTile(tile)) && IsTileOwner(tile, old_owner)) SetTileOwner(tile, OWNER_NONE);
03874     }
03875   }
03876 }
03877 
03886 static bool CanRemoveRoadWithStop(TileIndex tile, DoCommandFlag flags)
03887 {
03888   /* Yeah... water can always remove stops, right? */
03889   if (_current_company == OWNER_WATER) return true;
03890 
03891   RoadTypes rts = GetRoadTypes(tile);
03892   if (HasBit(rts, ROADTYPE_TRAM)) {
03893     Owner tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
03894     if (tram_owner != OWNER_NONE && CheckOwnership(tram_owner).Failed()) return false;
03895   }
03896   if (HasBit(rts, ROADTYPE_ROAD)) {
03897     Owner road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
03898     if (road_owner != OWNER_TOWN) {
03899       if (road_owner != OWNER_NONE && CheckOwnership(road_owner).Failed()) return false;
03900     } else {
03901       if (CheckAllowRemoveRoad(tile, GetAnyRoadBits(tile, ROADTYPE_ROAD), OWNER_TOWN, ROADTYPE_ROAD, flags).Failed()) return false;
03902     }
03903   }
03904 
03905   return true;
03906 }
03907 
03914 CommandCost ClearTile_Station(TileIndex tile, DoCommandFlag flags)
03915 {
03916   if (flags & DC_AUTO) {
03917     switch (GetStationType(tile)) {
03918       default: break;
03919       case STATION_RAIL:     return_cmd_error(STR_ERROR_MUST_DEMOLISH_RAILROAD);
03920       case STATION_WAYPOINT: return_cmd_error(STR_ERROR_BUILDING_MUST_BE_DEMOLISHED);
03921       case STATION_AIRPORT:  return_cmd_error(STR_ERROR_MUST_DEMOLISH_AIRPORT_FIRST);
03922       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);
03923       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);
03924       case STATION_BUOY:     return_cmd_error(STR_ERROR_BUOY_IN_THE_WAY);
03925       case STATION_DOCK:     return_cmd_error(STR_ERROR_MUST_DEMOLISH_DOCK_FIRST);
03926       case STATION_OILRIG:
03927         SetDParam(1, STR_INDUSTRY_NAME_OIL_RIG);
03928         return_cmd_error(STR_ERROR_GENERIC_OBJECT_IN_THE_WAY);
03929     }
03930   }
03931 
03932   switch (GetStationType(tile)) {
03933     case STATION_RAIL:     return RemoveRailStation(tile, flags);
03934     case STATION_WAYPOINT: return RemoveRailWaypoint(tile, flags);
03935     case STATION_AIRPORT:  return RemoveAirport(tile, flags);
03936     case STATION_TRUCK:
03937       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags)) {
03938         return_cmd_error(STR_ERROR_MUST_DEMOLISH_TRUCK_STATION_FIRST);
03939       }
03940       return RemoveRoadStop(tile, flags);
03941     case STATION_BUS:
03942       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags)) {
03943         return_cmd_error(STR_ERROR_MUST_DEMOLISH_BUS_STATION_FIRST);
03944       }
03945       return RemoveRoadStop(tile, flags);
03946     case STATION_BUOY:     return RemoveBuoy(tile, flags);
03947     case STATION_DOCK:     return RemoveDock(tile, flags);
03948     default: break;
03949   }
03950 
03951   return CMD_ERROR;
03952 }
03953 
03954 static CommandCost TerraformTile_Station(TileIndex tile, DoCommandFlag flags, int z_new, Slope tileh_new)
03955 {
03956   if (_settings_game.construction.build_on_slopes && AutoslopeEnabled()) {
03957     /* TODO: If you implement newgrf callback 149 'land slope check', you have to decide what to do with it here.
03958      *       TTDP does not call it.
03959      */
03960     if (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new)) {
03961       switch (GetStationType(tile)) {
03962         case STATION_WAYPOINT:
03963         case STATION_RAIL: {
03964           DiagDirection direction = AxisToDiagDir(GetRailStationAxis(tile));
03965           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
03966           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
03967           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03968         }
03969 
03970         case STATION_AIRPORT:
03971           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03972 
03973         case STATION_TRUCK:
03974         case STATION_BUS: {
03975           DiagDirection direction = GetRoadStopDir(tile);
03976           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
03977           if (IsDriveThroughStopTile(tile)) {
03978             if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
03979           }
03980           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03981         }
03982 
03983         default: break;
03984       }
03985     }
03986   }
03987   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
03988 }
03989 
03995 uint FlowStat::GetShare(StationID st) const
03996 {
03997   uint32 prev = 0;
03998   for (SharesMap::const_iterator it = this->shares.begin(); it != this->shares.end(); ++it) {
03999     if (it->second == st) {
04000       return it->first - prev;
04001     } else {
04002       prev = it->first;
04003     }
04004   }
04005   return 0;
04006 }
04007 
04013 StationID FlowStat::GetVia(StationID excluded, StationID excluded2) const
04014 {
04015   assert(!this->shares.empty());
04016   uint max = (--this->shares.end())->first - 1;
04017   SharesMap::const_iterator it = this->shares.upper_bound(RandomRange(max));
04018   assert(it != this->shares.end());
04019   if (it->second != excluded && it->second != excluded2) return it->second;
04020 
04021   /* We've hit one of the excluded stations.
04022    * Draw another share, from outside its range. */
04023 
04024   uint end = it->first;
04025   uint begin = (it == this->shares.begin() ? 0 : (--it)->first);
04026   uint interval = end - begin;
04027   if (interval > max) return INVALID_STATION; // Only one station in the map.
04028   uint new_max = max - interval;
04029   uint rand = RandomRange(new_max);
04030   SharesMap::const_iterator it2 = (rand < begin) ? this->shares.upper_bound(rand) :
04031       this->shares.upper_bound(rand + interval);
04032   if (it2->second != excluded && it2->second != excluded2) return it2->second;
04033 
04034   /* We've hit the second excluded station.
04035    * Same as before, only a bit more complicated. */
04036 
04037   uint end2 = it2->first;
04038   uint begin2 = (it2 == this->shares.begin() ? 0 : (--it2)->first);
04039   uint interval2 = end2 - begin2;
04040   if (interval2 > new_max) return INVALID_STATION; // Only the two excluded stations in the map.
04041   new_max = new_max - interval;
04042   if (begin > begin2) {
04043     Swap(begin, begin2);
04044     Swap(end, end2);
04045   }
04046   rand = RandomRange(new_max);
04047   if (rand < begin) {
04048     return this->shares.upper_bound(rand)->second;
04049   } else if (rand < begin2 - interval) {
04050     return this->shares.upper_bound(rand + interval)->second;
04051   } else {
04052     return this->shares.upper_bound(rand + interval + interval2)->second;
04053   }
04054 
04055 }
04056 
04061 void FlowStat::EraseShare(StationID st)
04062 {
04063   uint32 removed_shares = 0;
04064   uint32 last_share = 0;
04065   SharesMap new_shares;
04066   for (SharesMap::iterator it(this->shares.begin()); it != this->shares.end(); ++it) {
04067     if (it->second == st) {
04068       removed_shares += it->first - last_share;
04069     } else {
04070       new_shares[it->first - removed_shares] = it->second;
04071     }
04072     last_share = it->first;
04073   }
04074   this->shares.swap(new_shares);
04075   for (SharesMap::iterator it(this->shares.begin()); it != this->shares.end(); ++it) {
04076     assert(it->second != st);
04077   }
04078 }
04079 
04085 uint GoodsEntry::GetSumFlowVia(StationID via) const
04086 {
04087   uint ret = 0;
04088   for (FlowStatMap::const_iterator i = this->flows.begin(); i != this->flows.end(); ++i) {
04089     ret += i->second.GetShare(via);
04090   }
04091   return ret;
04092 }
04093 
04094 extern const TileTypeProcs _tile_type_station_procs = {
04095   DrawTile_Station,           // draw_tile_proc
04096   GetSlopePixelZ_Station,     // get_slope_z_proc
04097   ClearTile_Station,          // clear_tile_proc
04098   NULL,                       // add_accepted_cargo_proc
04099   GetTileDesc_Station,        // get_tile_desc_proc
04100   GetTileTrackStatus_Station, // get_tile_track_status_proc
04101   ClickTile_Station,          // click_tile_proc
04102   AnimateTile_Station,        // animate_tile_proc
04103   TileLoop_Station,           // tile_loop_proc
04104   ChangeTileOwner_Station,    // change_tile_owner_proc
04105   NULL,                       // add_produced_cargo_proc
04106   VehicleEnter_Station,       // vehicle_enter_tile_proc
04107   GetFoundation_Station,      // get_foundation_proc
04108   TerraformTile_Station,      // terraform_tile_proc
04109 };