station_cmd.cpp

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00001 /* $Id: station_cmd.cpp 25247 2013-05-17 18:56:51Z rubidium $ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
00012 #include "stdafx.h"
00013 #include "aircraft.h"
00014 #include "bridge_map.h"
00015 #include "cmd_helper.h"
00016 #include "viewport_func.h"
00017 #include "command_func.h"
00018 #include "town.h"
00019 #include "news_func.h"
00020 #include "train.h"
00021 #include "ship.h"
00022 #include "roadveh.h"
00023 #include "industry.h"
00024 #include "newgrf_cargo.h"
00025 #include "newgrf_debug.h"
00026 #include "newgrf_station.h"
00027 #include "newgrf_canal.h" /* For the buoy */
00028 #include "pathfinder/yapf/yapf_cache.h"
00029 #include "road_internal.h" /* For drawing catenary/checking road removal */
00030 #include "autoslope.h"
00031 #include "water.h"
00032 #include "strings_func.h"
00033 #include "clear_func.h"
00034 #include "date_func.h"
00035 #include "vehicle_func.h"
00036 #include "string_func.h"
00037 #include "animated_tile_func.h"
00038 #include "elrail_func.h"
00039 #include "station_base.h"
00040 #include "roadstop_base.h"
00041 #include "newgrf_railtype.h"
00042 #include "waypoint_base.h"
00043 #include "waypoint_func.h"
00044 #include "pbs.h"
00045 #include "debug.h"
00046 #include "core/random_func.hpp"
00047 #include "company_base.h"
00048 #include "table/airporttile_ids.h"
00049 #include "newgrf_airporttiles.h"
00050 #include "order_backup.h"
00051 #include "newgrf_house.h"
00052 #include "company_gui.h"
00053 #include "widgets/station_widget.h"
00054 
00055 #include "table/strings.h"
00056 
00063 bool IsHangar(TileIndex t)
00064 {
00065   assert(IsTileType(t, MP_STATION));
00066 
00067   /* If the tile isn't an airport there's no chance it's a hangar. */
00068   if (!IsAirport(t)) return false;
00069 
00070   const Station *st = Station::GetByTile(t);
00071   const AirportSpec *as = st->airport.GetSpec();
00072 
00073   for (uint i = 0; i < as->nof_depots; i++) {
00074     if (st->airport.GetHangarTile(i) == t) return true;
00075   }
00076 
00077   return false;
00078 }
00079 
00087 template <class T>
00088 CommandCost GetStationAround(TileArea ta, StationID closest_station, T **st)
00089 {
00090   ta.tile -= TileDiffXY(1, 1);
00091   ta.w    += 2;
00092   ta.h    += 2;
00093 
00094   /* check around to see if there's any stations there */
00095   TILE_AREA_LOOP(tile_cur, ta) {
00096     if (IsTileType(tile_cur, MP_STATION)) {
00097       StationID t = GetStationIndex(tile_cur);
00098       if (!T::IsValidID(t)) continue;
00099 
00100       if (closest_station == INVALID_STATION) {
00101         closest_station = t;
00102       } else if (closest_station != t) {
00103         return_cmd_error(STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING);
00104       }
00105     }
00106   }
00107   *st = (closest_station == INVALID_STATION) ? NULL : T::Get(closest_station);
00108   return CommandCost();
00109 }
00110 
00116 typedef bool (*CMSAMatcher)(TileIndex tile);
00117 
00124 static int CountMapSquareAround(TileIndex tile, CMSAMatcher cmp)
00125 {
00126   int num = 0;
00127 
00128   for (int dx = -3; dx <= 3; dx++) {
00129     for (int dy = -3; dy <= 3; dy++) {
00130       TileIndex t = TileAddWrap(tile, dx, dy);
00131       if (t != INVALID_TILE && cmp(t)) num++;
00132     }
00133   }
00134 
00135   return num;
00136 }
00137 
00143 static bool CMSAMine(TileIndex tile)
00144 {
00145   /* No industry */
00146   if (!IsTileType(tile, MP_INDUSTRY)) return false;
00147 
00148   const Industry *ind = Industry::GetByTile(tile);
00149 
00150   /* No extractive industry */
00151   if ((GetIndustrySpec(ind->type)->life_type & INDUSTRYLIFE_EXTRACTIVE) == 0) return false;
00152 
00153   for (uint i = 0; i < lengthof(ind->produced_cargo); i++) {
00154     /* The industry extracts something non-liquid, i.e. no oil or plastic, so it is a mine.
00155      * Also the production of passengers and mail is ignored. */
00156     if (ind->produced_cargo[i] != CT_INVALID &&
00157         (CargoSpec::Get(ind->produced_cargo[i])->classes & (CC_LIQUID | CC_PASSENGERS | CC_MAIL)) == 0) {
00158       return true;
00159     }
00160   }
00161 
00162   return false;
00163 }
00164 
00170 static bool CMSAWater(TileIndex tile)
00171 {
00172   return IsTileType(tile, MP_WATER) && IsWater(tile);
00173 }
00174 
00180 static bool CMSATree(TileIndex tile)
00181 {
00182   return IsTileType(tile, MP_TREES);
00183 }
00184 
00185 #define M(x) ((x) - STR_SV_STNAME)
00186 
00187 enum StationNaming {
00188   STATIONNAMING_RAIL,
00189   STATIONNAMING_ROAD,
00190   STATIONNAMING_AIRPORT,
00191   STATIONNAMING_OILRIG,
00192   STATIONNAMING_DOCK,
00193   STATIONNAMING_HELIPORT,
00194 };
00195 
00197 struct StationNameInformation {
00198   uint32 free_names; 
00199   bool *indtypes;    
00200 };
00201 
00210 static bool FindNearIndustryName(TileIndex tile, void *user_data)
00211 {
00212   /* All already found industry types */
00213   StationNameInformation *sni = (StationNameInformation*)user_data;
00214   if (!IsTileType(tile, MP_INDUSTRY)) return false;
00215 
00216   /* If the station name is undefined it means that it doesn't name a station */
00217   IndustryType indtype = GetIndustryType(tile);
00218   if (GetIndustrySpec(indtype)->station_name == STR_UNDEFINED) return false;
00219 
00220   /* In all cases if an industry that provides a name is found two of
00221    * the standard names will be disabled. */
00222   sni->free_names &= ~(1 << M(STR_SV_STNAME_OILFIELD) | 1 << M(STR_SV_STNAME_MINES));
00223   return !sni->indtypes[indtype];
00224 }
00225 
00226 static StringID GenerateStationName(Station *st, TileIndex tile, StationNaming name_class)
00227 {
00228   static const uint32 _gen_station_name_bits[] = {
00229     0,                                       // STATIONNAMING_RAIL
00230     0,                                       // STATIONNAMING_ROAD
00231     1U << M(STR_SV_STNAME_AIRPORT),          // STATIONNAMING_AIRPORT
00232     1U << M(STR_SV_STNAME_OILFIELD),         // STATIONNAMING_OILRIG
00233     1U << M(STR_SV_STNAME_DOCKS),            // STATIONNAMING_DOCK
00234     1U << M(STR_SV_STNAME_HELIPORT),         // STATIONNAMING_HELIPORT
00235   };
00236 
00237   const Town *t = st->town;
00238   uint32 free_names = UINT32_MAX;
00239 
00240   bool indtypes[NUM_INDUSTRYTYPES];
00241   memset(indtypes, 0, sizeof(indtypes));
00242 
00243   const Station *s;
00244   FOR_ALL_STATIONS(s) {
00245     if (s != st && s->town == t) {
00246       if (s->indtype != IT_INVALID) {
00247         indtypes[s->indtype] = true;
00248         continue;
00249       }
00250       uint str = M(s->string_id);
00251       if (str <= 0x20) {
00252         if (str == M(STR_SV_STNAME_FOREST)) {
00253           str = M(STR_SV_STNAME_WOODS);
00254         }
00255         ClrBit(free_names, str);
00256       }
00257     }
00258   }
00259 
00260   TileIndex indtile = tile;
00261   StationNameInformation sni = { free_names, indtypes };
00262   if (CircularTileSearch(&indtile, 7, FindNearIndustryName, &sni)) {
00263     /* An industry has been found nearby */
00264     IndustryType indtype = GetIndustryType(indtile);
00265     const IndustrySpec *indsp = GetIndustrySpec(indtype);
00266     /* STR_NULL means it only disables oil rig/mines */
00267     if (indsp->station_name != STR_NULL) {
00268       st->indtype = indtype;
00269       return STR_SV_STNAME_FALLBACK;
00270     }
00271   }
00272 
00273   /* Oil rigs/mines name could be marked not free by looking for a near by industry. */
00274   free_names = sni.free_names;
00275 
00276   /* check default names */
00277   uint32 tmp = free_names & _gen_station_name_bits[name_class];
00278   if (tmp != 0) return STR_SV_STNAME + FindFirstBit(tmp);
00279 
00280   /* check mine? */
00281   if (HasBit(free_names, M(STR_SV_STNAME_MINES))) {
00282     if (CountMapSquareAround(tile, CMSAMine) >= 2) {
00283       return STR_SV_STNAME_MINES;
00284     }
00285   }
00286 
00287   /* check close enough to town to get central as name? */
00288   if (DistanceMax(tile, t->xy) < 8) {
00289     if (HasBit(free_names, M(STR_SV_STNAME))) return STR_SV_STNAME;
00290 
00291     if (HasBit(free_names, M(STR_SV_STNAME_CENTRAL))) return STR_SV_STNAME_CENTRAL;
00292   }
00293 
00294   /* Check lakeside */
00295   if (HasBit(free_names, M(STR_SV_STNAME_LAKESIDE)) &&
00296       DistanceFromEdge(tile) < 20 &&
00297       CountMapSquareAround(tile, CMSAWater) >= 5) {
00298     return STR_SV_STNAME_LAKESIDE;
00299   }
00300 
00301   /* Check woods */
00302   if (HasBit(free_names, M(STR_SV_STNAME_WOODS)) && (
00303         CountMapSquareAround(tile, CMSATree) >= 8 ||
00304         CountMapSquareAround(tile, IsTileForestIndustry) >= 2)
00305       ) {
00306     return _settings_game.game_creation.landscape == LT_TROPIC ? STR_SV_STNAME_FOREST : STR_SV_STNAME_WOODS;
00307   }
00308 
00309   /* check elevation compared to town */
00310   int z = GetTileZ(tile);
00311   int z2 = GetTileZ(t->xy);
00312   if (z < z2) {
00313     if (HasBit(free_names, M(STR_SV_STNAME_VALLEY))) return STR_SV_STNAME_VALLEY;
00314   } else if (z > z2) {
00315     if (HasBit(free_names, M(STR_SV_STNAME_HEIGHTS))) return STR_SV_STNAME_HEIGHTS;
00316   }
00317 
00318   /* check direction compared to town */
00319   static const int8 _direction_and_table[] = {
00320     ~( (1 << M(STR_SV_STNAME_WEST))  | (1 << M(STR_SV_STNAME_EAST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
00321     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_WEST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
00322     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_EAST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
00323     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_WEST)) | (1 << M(STR_SV_STNAME_EAST)) ),
00324   };
00325 
00326   free_names &= _direction_and_table[
00327     (TileX(tile) < TileX(t->xy)) +
00328     (TileY(tile) < TileY(t->xy)) * 2];
00329 
00330   tmp = free_names & ((1 << 1) | (1 << 2) | (1 << 3) | (1 << 4) | (1 << 6) | (1 << 7) | (1 << 12) | (1 << 26) | (1 << 27) | (1 << 28) | (1 << 29) | (1 << 30));
00331   return (tmp == 0) ? STR_SV_STNAME_FALLBACK : (STR_SV_STNAME + FindFirstBit(tmp));
00332 }
00333 #undef M
00334 
00340 static Station *GetClosestDeletedStation(TileIndex tile)
00341 {
00342   uint threshold = 8;
00343   Station *best_station = NULL;
00344   Station *st;
00345 
00346   FOR_ALL_STATIONS(st) {
00347     if (!st->IsInUse() && st->owner == _current_company) {
00348       uint cur_dist = DistanceManhattan(tile, st->xy);
00349 
00350       if (cur_dist < threshold) {
00351         threshold = cur_dist;
00352         best_station = st;
00353       }
00354     }
00355   }
00356 
00357   return best_station;
00358 }
00359 
00360 
00361 void Station::GetTileArea(TileArea *ta, StationType type) const
00362 {
00363   switch (type) {
00364     case STATION_RAIL:
00365       *ta = this->train_station;
00366       return;
00367 
00368     case STATION_AIRPORT:
00369       *ta = this->airport;
00370       return;
00371 
00372     case STATION_TRUCK:
00373       *ta = this->truck_station;
00374       return;
00375 
00376     case STATION_BUS:
00377       *ta = this->bus_station;
00378       return;
00379 
00380     case STATION_DOCK:
00381     case STATION_OILRIG:
00382       ta->tile = this->dock_tile;
00383       break;
00384 
00385     default: NOT_REACHED();
00386   }
00387 
00388   ta->w = 1;
00389   ta->h = 1;
00390 }
00391 
00395 void Station::UpdateVirtCoord()
00396 {
00397   Point pt = RemapCoords2(TileX(this->xy) * TILE_SIZE, TileY(this->xy) * TILE_SIZE);
00398 
00399   pt.y -= 32 * ZOOM_LVL_BASE;
00400   if ((this->facilities & FACIL_AIRPORT) && this->airport.type == AT_OILRIG) pt.y -= 16 * ZOOM_LVL_BASE;
00401 
00402   SetDParam(0, this->index);
00403   SetDParam(1, this->facilities);
00404   this->sign.UpdatePosition(pt.x, pt.y, STR_VIEWPORT_STATION);
00405 
00406   SetWindowDirty(WC_STATION_VIEW, this->index);
00407 }
00408 
00410 void UpdateAllStationVirtCoords()
00411 {
00412   BaseStation *st;
00413 
00414   FOR_ALL_BASE_STATIONS(st) {
00415     st->UpdateVirtCoord();
00416   }
00417 }
00418 
00424 static uint GetAcceptanceMask(const Station *st)
00425 {
00426   uint mask = 0;
00427 
00428   for (CargoID i = 0; i < NUM_CARGO; i++) {
00429     if (HasBit(st->goods[i].acceptance_pickup, GoodsEntry::GES_ACCEPTANCE)) mask |= 1 << i;
00430   }
00431   return mask;
00432 }
00433 
00438 static void ShowRejectOrAcceptNews(const Station *st, uint num_items, CargoID *cargo, StringID msg)
00439 {
00440   for (uint i = 0; i < num_items; i++) {
00441     SetDParam(i + 1, CargoSpec::Get(cargo[i])->name);
00442   }
00443 
00444   SetDParam(0, st->index);
00445   AddNewsItem(msg, NT_ACCEPTANCE, NF_INCOLOUR | NF_SMALL, NR_STATION, st->index);
00446 }
00447 
00455 CargoArray GetProductionAroundTiles(TileIndex tile, int w, int h, int rad)
00456 {
00457   CargoArray produced;
00458 
00459   int x = TileX(tile);
00460   int y = TileY(tile);
00461 
00462   /* expand the region by rad tiles on each side
00463    * while making sure that we remain inside the board. */
00464   int x2 = min(x + w + rad, MapSizeX());
00465   int x1 = max(x - rad, 0);
00466 
00467   int y2 = min(y + h + rad, MapSizeY());
00468   int y1 = max(y - rad, 0);
00469 
00470   assert(x1 < x2);
00471   assert(y1 < y2);
00472   assert(w > 0);
00473   assert(h > 0);
00474 
00475   TileArea ta(TileXY(x1, y1), TileXY(x2 - 1, y2 - 1));
00476 
00477   /* Loop over all tiles to get the produced cargo of
00478    * everything except industries */
00479   TILE_AREA_LOOP(tile, ta) AddProducedCargo(tile, produced);
00480 
00481   /* Loop over the industries. They produce cargo for
00482    * anything that is within 'rad' from their bounding
00483    * box. As such if you have e.g. a oil well the tile
00484    * area loop might not hit an industry tile while
00485    * the industry would produce cargo for the station.
00486    */
00487   const Industry *i;
00488   FOR_ALL_INDUSTRIES(i) {
00489     if (!ta.Intersects(i->location)) continue;
00490 
00491     for (uint j = 0; j < lengthof(i->produced_cargo); j++) {
00492       CargoID cargo = i->produced_cargo[j];
00493       if (cargo != CT_INVALID) produced[cargo]++;
00494     }
00495   }
00496 
00497   return produced;
00498 }
00499 
00508 CargoArray GetAcceptanceAroundTiles(TileIndex tile, int w, int h, int rad, uint32 *always_accepted)
00509 {
00510   CargoArray acceptance;
00511   if (always_accepted != NULL) *always_accepted = 0;
00512 
00513   int x = TileX(tile);
00514   int y = TileY(tile);
00515 
00516   /* expand the region by rad tiles on each side
00517    * while making sure that we remain inside the board. */
00518   int x2 = min(x + w + rad, MapSizeX());
00519   int y2 = min(y + h + rad, MapSizeY());
00520   int x1 = max(x - rad, 0);
00521   int y1 = max(y - rad, 0);
00522 
00523   assert(x1 < x2);
00524   assert(y1 < y2);
00525   assert(w > 0);
00526   assert(h > 0);
00527 
00528   for (int yc = y1; yc != y2; yc++) {
00529     for (int xc = x1; xc != x2; xc++) {
00530       TileIndex tile = TileXY(xc, yc);
00531       AddAcceptedCargo(tile, acceptance, always_accepted);
00532     }
00533   }
00534 
00535   return acceptance;
00536 }
00537 
00543 void UpdateStationAcceptance(Station *st, bool show_msg)
00544 {
00545   /* old accepted goods types */
00546   uint old_acc = GetAcceptanceMask(st);
00547 
00548   /* And retrieve the acceptance. */
00549   CargoArray acceptance;
00550   if (!st->rect.IsEmpty()) {
00551     acceptance = GetAcceptanceAroundTiles(
00552       TileXY(st->rect.left, st->rect.top),
00553       st->rect.right  - st->rect.left + 1,
00554       st->rect.bottom - st->rect.top  + 1,
00555       st->GetCatchmentRadius(),
00556       &st->always_accepted
00557     );
00558   }
00559 
00560   /* Adjust in case our station only accepts fewer kinds of goods */
00561   for (CargoID i = 0; i < NUM_CARGO; i++) {
00562     uint amt = min(acceptance[i], 15);
00563 
00564     /* Make sure the station can accept the goods type. */
00565     bool is_passengers = IsCargoInClass(i, CC_PASSENGERS);
00566     if ((!is_passengers && !(st->facilities & ~FACIL_BUS_STOP)) ||
00567         (is_passengers && !(st->facilities & ~FACIL_TRUCK_STOP))) {
00568       amt = 0;
00569     }
00570 
00571     SB(st->goods[i].acceptance_pickup, GoodsEntry::GES_ACCEPTANCE, 1, amt >= 8);
00572   }
00573 
00574   /* Only show a message in case the acceptance was actually changed. */
00575   uint new_acc = GetAcceptanceMask(st);
00576   if (old_acc == new_acc) return;
00577 
00578   /* show a message to report that the acceptance was changed? */
00579   if (show_msg && st->owner == _local_company && st->IsInUse()) {
00580     /* List of accept and reject strings for different number of
00581      * cargo types */
00582     static const StringID accept_msg[] = {
00583       STR_NEWS_STATION_NOW_ACCEPTS_CARGO,
00584       STR_NEWS_STATION_NOW_ACCEPTS_CARGO_AND_CARGO,
00585     };
00586     static const StringID reject_msg[] = {
00587       STR_NEWS_STATION_NO_LONGER_ACCEPTS_CARGO,
00588       STR_NEWS_STATION_NO_LONGER_ACCEPTS_CARGO_OR_CARGO,
00589     };
00590 
00591     /* Array of accepted and rejected cargo types */
00592     CargoID accepts[2] = { CT_INVALID, CT_INVALID };
00593     CargoID rejects[2] = { CT_INVALID, CT_INVALID };
00594     uint num_acc = 0;
00595     uint num_rej = 0;
00596 
00597     /* Test each cargo type to see if its acceptance has changed */
00598     for (CargoID i = 0; i < NUM_CARGO; i++) {
00599       if (HasBit(new_acc, i)) {
00600         if (!HasBit(old_acc, i) && num_acc < lengthof(accepts)) {
00601           /* New cargo is accepted */
00602           accepts[num_acc++] = i;
00603         }
00604       } else {
00605         if (HasBit(old_acc, i) && num_rej < lengthof(rejects)) {
00606           /* Old cargo is no longer accepted */
00607           rejects[num_rej++] = i;
00608         }
00609       }
00610     }
00611 
00612     /* Show news message if there are any changes */
00613     if (num_acc > 0) ShowRejectOrAcceptNews(st, num_acc, accepts, accept_msg[num_acc - 1]);
00614     if (num_rej > 0) ShowRejectOrAcceptNews(st, num_rej, rejects, reject_msg[num_rej - 1]);
00615   }
00616 
00617   /* redraw the station view since acceptance changed */
00618   SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_ACCEPT_RATING_LIST);
00619 }
00620 
00621 static void UpdateStationSignCoord(BaseStation *st)
00622 {
00623   const StationRect *r = &st->rect;
00624 
00625   if (r->IsEmpty()) return; // no tiles belong to this station
00626 
00627   /* clamp sign coord to be inside the station rect */
00628   st->xy = TileXY(ClampU(TileX(st->xy), r->left, r->right), ClampU(TileY(st->xy), r->top, r->bottom));
00629   st->UpdateVirtCoord();
00630 }
00631 
00641 static CommandCost BuildStationPart(Station **st, DoCommandFlag flags, bool reuse, TileArea area, StationNaming name_class)
00642 {
00643   /* Find a deleted station close to us */
00644   if (*st == NULL && reuse) *st = GetClosestDeletedStation(area.tile);
00645 
00646   if (*st != NULL) {
00647     if ((*st)->owner != _current_company) {
00648       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
00649     }
00650 
00651     CommandCost ret = (*st)->rect.BeforeAddRect(area.tile, area.w, area.h, StationRect::ADD_TEST);
00652     if (ret.Failed()) return ret;
00653   } else {
00654     /* allocate and initialize new station */
00655     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
00656 
00657     if (flags & DC_EXEC) {
00658       *st = new Station(area.tile);
00659 
00660       (*st)->town = ClosestTownFromTile(area.tile, UINT_MAX);
00661       (*st)->string_id = GenerateStationName(*st, area.tile, name_class);
00662 
00663       if (Company::IsValidID(_current_company)) {
00664         SetBit((*st)->town->have_ratings, _current_company);
00665       }
00666     }
00667   }
00668   return CommandCost();
00669 }
00670 
00677 static void DeleteStationIfEmpty(BaseStation *st)
00678 {
00679   if (!st->IsInUse()) {
00680     st->delete_ctr = 0;
00681     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
00682   }
00683   /* station remains but it probably lost some parts - station sign should stay in the station boundaries */
00684   UpdateStationSignCoord(st);
00685 }
00686 
00687 CommandCost ClearTile_Station(TileIndex tile, DoCommandFlag flags);
00688 
00698 CommandCost CheckBuildableTile(TileIndex tile, uint invalid_dirs, int &allowed_z, bool allow_steep, bool check_bridge = true)
00699 {
00700   if (check_bridge && MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) {
00701     return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
00702   }
00703 
00704   CommandCost ret = EnsureNoVehicleOnGround(tile);
00705   if (ret.Failed()) return ret;
00706 
00707   int z;
00708   Slope tileh = GetTileSlope(tile, &z);
00709 
00710   /* Prohibit building if
00711    *   1) The tile is "steep" (i.e. stretches two height levels).
00712    *   2) The tile is non-flat and the build_on_slopes switch is disabled.
00713    */
00714   if ((!allow_steep && IsSteepSlope(tileh)) ||
00715       ((!_settings_game.construction.build_on_slopes) && tileh != SLOPE_FLAT)) {
00716     return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00717   }
00718 
00719   CommandCost cost(EXPENSES_CONSTRUCTION);
00720   int flat_z = z + GetSlopeMaxZ(tileh);
00721   if (tileh != SLOPE_FLAT) {
00722     /* Forbid building if the tile faces a slope in a invalid direction. */
00723     for (DiagDirection dir = DIAGDIR_BEGIN; dir != DIAGDIR_END; dir++) {
00724       if (HasBit(invalid_dirs, dir) && !CanBuildDepotByTileh(dir, tileh)) {
00725         return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00726       }
00727     }
00728     cost.AddCost(_price[PR_BUILD_FOUNDATION]);
00729   }
00730 
00731   /* The level of this tile must be equal to allowed_z. */
00732   if (allowed_z < 0) {
00733     /* First tile. */
00734     allowed_z = flat_z;
00735   } else if (allowed_z != flat_z) {
00736     return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00737   }
00738 
00739   return cost;
00740 }
00741 
00748 CommandCost CheckFlatLand(TileArea tile_area, DoCommandFlag flags)
00749 {
00750   CommandCost cost(EXPENSES_CONSTRUCTION);
00751   int allowed_z = -1;
00752 
00753   TILE_AREA_LOOP(tile_cur, tile_area) {
00754     CommandCost ret = CheckBuildableTile(tile_cur, 0, allowed_z, true);
00755     if (ret.Failed()) return ret;
00756     cost.AddCost(ret);
00757 
00758     ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00759     if (ret.Failed()) return ret;
00760     cost.AddCost(ret);
00761   }
00762 
00763   return cost;
00764 }
00765 
00780 static CommandCost CheckFlatLandRailStation(TileArea tile_area, DoCommandFlag flags, Axis axis, StationID *station, RailType rt, SmallVector<Train *, 4> &affected_vehicles, StationClassID spec_class, byte spec_index, byte plat_len, byte numtracks)
00781 {
00782   CommandCost cost(EXPENSES_CONSTRUCTION);
00783   int allowed_z = -1;
00784   uint invalid_dirs = 5 << axis;
00785 
00786   const StationSpec *statspec = StationClass::Get(spec_class)->GetSpec(spec_index);
00787   bool slope_cb = statspec != NULL && HasBit(statspec->callback_mask, CBM_STATION_SLOPE_CHECK);
00788 
00789   TILE_AREA_LOOP(tile_cur, tile_area) {
00790     CommandCost ret = CheckBuildableTile(tile_cur, invalid_dirs, allowed_z, false);
00791     if (ret.Failed()) return ret;
00792     cost.AddCost(ret);
00793 
00794     if (slope_cb) {
00795       /* Do slope check if requested. */
00796       ret = PerformStationTileSlopeCheck(tile_area.tile, tile_cur, statspec, axis, plat_len, numtracks);
00797       if (ret.Failed()) return ret;
00798     }
00799 
00800     /* if station is set, then we have special handling to allow building on top of already existing stations.
00801      * so station points to INVALID_STATION if we can build on any station.
00802      * Or it points to a station if we're only allowed to build on exactly that station. */
00803     if (station != NULL && IsTileType(tile_cur, MP_STATION)) {
00804       if (!IsRailStation(tile_cur)) {
00805         return ClearTile_Station(tile_cur, DC_AUTO); // get error message
00806       } else {
00807         StationID st = GetStationIndex(tile_cur);
00808         if (*station == INVALID_STATION) {
00809           *station = st;
00810         } else if (*station != st) {
00811           return_cmd_error(STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING);
00812         }
00813       }
00814     } else {
00815       /* Rail type is only valid when building a railway station; if station to
00816        * build isn't a rail station it's INVALID_RAILTYPE. */
00817       if (rt != INVALID_RAILTYPE &&
00818           IsPlainRailTile(tile_cur) && !HasSignals(tile_cur) &&
00819           HasPowerOnRail(GetRailType(tile_cur), rt)) {
00820         /* Allow overbuilding if the tile:
00821          *  - has rail, but no signals
00822          *  - it has exactly one track
00823          *  - the track is in line with the station
00824          *  - the current rail type has power on the to-be-built type (e.g. convert normal rail to el rail)
00825          */
00826         TrackBits tracks = GetTrackBits(tile_cur);
00827         Track track = RemoveFirstTrack(&tracks);
00828         Track expected_track = HasBit(invalid_dirs, DIAGDIR_NE) ? TRACK_X : TRACK_Y;
00829 
00830         if (tracks == TRACK_BIT_NONE && track == expected_track) {
00831           /* Check for trains having a reservation for this tile. */
00832           if (HasBit(GetRailReservationTrackBits(tile_cur), track)) {
00833             Train *v = GetTrainForReservation(tile_cur, track);
00834             if (v != NULL) {
00835               *affected_vehicles.Append() = v;
00836             }
00837           }
00838           CommandCost ret = DoCommand(tile_cur, 0, track, flags, CMD_REMOVE_SINGLE_RAIL);
00839           if (ret.Failed()) return ret;
00840           cost.AddCost(ret);
00841           /* With flags & ~DC_EXEC CmdLandscapeClear would fail since the rail still exists */
00842           continue;
00843         }
00844       }
00845       ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00846       if (ret.Failed()) return ret;
00847       cost.AddCost(ret);
00848     }
00849   }
00850 
00851   return cost;
00852 }
00853 
00866 static CommandCost CheckFlatLandRoadStop(TileArea tile_area, DoCommandFlag flags, uint invalid_dirs, bool is_drive_through, bool is_truck_stop, Axis axis, StationID *station, RoadTypes rts)
00867 {
00868   CommandCost cost(EXPENSES_CONSTRUCTION);
00869   int allowed_z = -1;
00870 
00871   TILE_AREA_LOOP(cur_tile, tile_area) {
00872     CommandCost ret = CheckBuildableTile(cur_tile, invalid_dirs, allowed_z, !is_drive_through);
00873     if (ret.Failed()) return ret;
00874     cost.AddCost(ret);
00875 
00876     /* If station is set, then we have special handling to allow building on top of already existing stations.
00877      * Station points to INVALID_STATION if we can build on any station.
00878      * Or it points to a station if we're only allowed to build on exactly that station. */
00879     if (station != NULL && IsTileType(cur_tile, MP_STATION)) {
00880       if (!IsRoadStop(cur_tile)) {
00881         return ClearTile_Station(cur_tile, DC_AUTO); // Get error message.
00882       } else {
00883         if (is_truck_stop != IsTruckStop(cur_tile) ||
00884             is_drive_through != IsDriveThroughStopTile(cur_tile)) {
00885           return ClearTile_Station(cur_tile, DC_AUTO); // Get error message.
00886         }
00887         /* Drive-through station in the wrong direction. */
00888         if (is_drive_through && IsDriveThroughStopTile(cur_tile) && DiagDirToAxis(GetRoadStopDir(cur_tile)) != axis){
00889           return_cmd_error(STR_ERROR_DRIVE_THROUGH_DIRECTION);
00890         }
00891         StationID st = GetStationIndex(cur_tile);
00892         if (*station == INVALID_STATION) {
00893           *station = st;
00894         } else if (*station != st) {
00895           return_cmd_error(STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING);
00896         }
00897       }
00898     } else {
00899       bool build_over_road = is_drive_through && IsNormalRoadTile(cur_tile);
00900       /* Road bits in the wrong direction. */
00901       RoadBits rb = IsNormalRoadTile(cur_tile) ? GetAllRoadBits(cur_tile) : ROAD_NONE;
00902       if (build_over_road && (rb & (axis == AXIS_X ? ROAD_Y : ROAD_X)) != 0) {
00903         /* Someone was pedantic and *NEEDED* three fracking different error messages. */
00904         switch (CountBits(rb)) {
00905           case 1:
00906             return_cmd_error(STR_ERROR_DRIVE_THROUGH_DIRECTION);
00907 
00908           case 2:
00909             if (rb == ROAD_X || rb == ROAD_Y) return_cmd_error(STR_ERROR_DRIVE_THROUGH_DIRECTION);
00910             return_cmd_error(STR_ERROR_DRIVE_THROUGH_CORNER);
00911 
00912           default: // 3 or 4
00913             return_cmd_error(STR_ERROR_DRIVE_THROUGH_JUNCTION);
00914         }
00915       }
00916 
00917       RoadTypes cur_rts = IsNormalRoadTile(cur_tile) ? GetRoadTypes(cur_tile) : ROADTYPES_NONE;
00918       uint num_roadbits = 0;
00919       if (build_over_road) {
00920         /* There is a road, check if we can build road+tram stop over it. */
00921         if (HasBit(cur_rts, ROADTYPE_ROAD)) {
00922           Owner road_owner = GetRoadOwner(cur_tile, ROADTYPE_ROAD);
00923           if (road_owner == OWNER_TOWN) {
00924             if (!_settings_game.construction.road_stop_on_town_road) return_cmd_error(STR_ERROR_DRIVE_THROUGH_ON_TOWN_ROAD);
00925           } else if (!_settings_game.construction.road_stop_on_competitor_road && road_owner != OWNER_NONE) {
00926             CommandCost ret = CheckOwnership(road_owner);
00927             if (ret.Failed()) return ret;
00928           }
00929           num_roadbits += CountBits(GetRoadBits(cur_tile, ROADTYPE_ROAD));
00930         }
00931 
00932         /* There is a tram, check if we can build road+tram stop over it. */
00933         if (HasBit(cur_rts, ROADTYPE_TRAM)) {
00934           Owner tram_owner = GetRoadOwner(cur_tile, ROADTYPE_TRAM);
00935           if (!_settings_game.construction.road_stop_on_competitor_road && tram_owner != OWNER_NONE) {
00936             CommandCost ret = CheckOwnership(tram_owner);
00937             if (ret.Failed()) return ret;
00938           }
00939           num_roadbits += CountBits(GetRoadBits(cur_tile, ROADTYPE_TRAM));
00940         }
00941 
00942         /* Take into account existing roadbits. */
00943         rts |= cur_rts;
00944       } else {
00945         ret = DoCommand(cur_tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00946         if (ret.Failed()) return ret;
00947         cost.AddCost(ret);
00948       }
00949 
00950       uint roadbits_to_build = CountBits(rts) * 2 - num_roadbits;
00951       cost.AddCost(_price[PR_BUILD_ROAD] * roadbits_to_build);
00952     }
00953   }
00954 
00955   return cost;
00956 }
00957 
00965 CommandCost CanExpandRailStation(const BaseStation *st, TileArea &new_ta, Axis axis)
00966 {
00967   TileArea cur_ta = st->train_station;
00968 
00969   /* determine new size of train station region.. */
00970   int x = min(TileX(cur_ta.tile), TileX(new_ta.tile));
00971   int y = min(TileY(cur_ta.tile), TileY(new_ta.tile));
00972   new_ta.w = max(TileX(cur_ta.tile) + cur_ta.w, TileX(new_ta.tile) + new_ta.w) - x;
00973   new_ta.h = max(TileY(cur_ta.tile) + cur_ta.h, TileY(new_ta.tile) + new_ta.h) - y;
00974   new_ta.tile = TileXY(x, y);
00975 
00976   /* make sure the final size is not too big. */
00977   if (new_ta.w > _settings_game.station.station_spread || new_ta.h > _settings_game.station.station_spread) {
00978     return_cmd_error(STR_ERROR_STATION_TOO_SPREAD_OUT);
00979   }
00980 
00981   return CommandCost();
00982 }
00983 
00984 static inline byte *CreateSingle(byte *layout, int n)
00985 {
00986   int i = n;
00987   do *layout++ = 0; while (--i);
00988   layout[((n - 1) >> 1) - n] = 2;
00989   return layout;
00990 }
00991 
00992 static inline byte *CreateMulti(byte *layout, int n, byte b)
00993 {
00994   int i = n;
00995   do *layout++ = b; while (--i);
00996   if (n > 4) {
00997     layout[0 - n] = 0;
00998     layout[n - 1 - n] = 0;
00999   }
01000   return layout;
01001 }
01002 
01010 void GetStationLayout(byte *layout, int numtracks, int plat_len, const StationSpec *statspec)
01011 {
01012   if (statspec != NULL && statspec->lengths >= plat_len &&
01013       statspec->platforms[plat_len - 1] >= numtracks &&
01014       statspec->layouts[plat_len - 1][numtracks - 1]) {
01015     /* Custom layout defined, follow it. */
01016     memcpy(layout, statspec->layouts[plat_len - 1][numtracks - 1],
01017       plat_len * numtracks);
01018     return;
01019   }
01020 
01021   if (plat_len == 1) {
01022     CreateSingle(layout, numtracks);
01023   } else {
01024     if (numtracks & 1) layout = CreateSingle(layout, plat_len);
01025     numtracks >>= 1;
01026 
01027     while (--numtracks >= 0) {
01028       layout = CreateMulti(layout, plat_len, 4);
01029       layout = CreateMulti(layout, plat_len, 6);
01030     }
01031   }
01032 }
01033 
01045 template <class T, StringID error_message>
01046 CommandCost FindJoiningBaseStation(StationID existing_station, StationID station_to_join, bool adjacent, TileArea ta, T **st)
01047 {
01048   assert(*st == NULL);
01049   bool check_surrounding = true;
01050 
01051   if (_settings_game.station.adjacent_stations) {
01052     if (existing_station != INVALID_STATION) {
01053       if (adjacent && existing_station != station_to_join) {
01054         /* You can't build an adjacent station over the top of one that
01055          * already exists. */
01056         return_cmd_error(error_message);
01057       } else {
01058         /* Extend the current station, and don't check whether it will
01059          * be near any other stations. */
01060         *st = T::GetIfValid(existing_station);
01061         check_surrounding = (*st == NULL);
01062       }
01063     } else {
01064       /* There's no station here. Don't check the tiles surrounding this
01065        * one if the company wanted to build an adjacent station. */
01066       if (adjacent) check_surrounding = false;
01067     }
01068   }
01069 
01070   if (check_surrounding) {
01071     /* Make sure there are no similar stations around us. */
01072     CommandCost ret = GetStationAround(ta, existing_station, st);
01073     if (ret.Failed()) return ret;
01074   }
01075 
01076   /* Distant join */
01077   if (*st == NULL && station_to_join != INVALID_STATION) *st = T::GetIfValid(station_to_join);
01078 
01079   return CommandCost();
01080 }
01081 
01091 static CommandCost FindJoiningStation(StationID existing_station, StationID station_to_join, bool adjacent, TileArea ta, Station **st)
01092 {
01093   return FindJoiningBaseStation<Station, STR_ERROR_MUST_REMOVE_RAILWAY_STATION_FIRST>(existing_station, station_to_join, adjacent, ta, st);
01094 }
01095 
01105 CommandCost FindJoiningWaypoint(StationID existing_waypoint, StationID waypoint_to_join, bool adjacent, TileArea ta, Waypoint **wp)
01106 {
01107   return FindJoiningBaseStation<Waypoint, STR_ERROR_MUST_REMOVE_RAILWAYPOINT_FIRST>(existing_waypoint, waypoint_to_join, adjacent, ta, wp);
01108 }
01109 
01127 CommandCost CmdBuildRailStation(TileIndex tile_org, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01128 {
01129   /* Unpack parameters */
01130   RailType rt    = Extract<RailType, 0, 4>(p1);
01131   Axis axis      = Extract<Axis, 4, 1>(p1);
01132   byte numtracks = GB(p1,  8, 8);
01133   byte plat_len  = GB(p1, 16, 8);
01134   bool adjacent  = HasBit(p1, 24);
01135 
01136   StationClassID spec_class = Extract<StationClassID, 0, 8>(p2);
01137   byte spec_index           = GB(p2, 8, 8);
01138   StationID station_to_join = GB(p2, 16, 16);
01139 
01140   /* Does the authority allow this? */
01141   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile_org, flags);
01142   if (ret.Failed()) return ret;
01143 
01144   if (!ValParamRailtype(rt)) return CMD_ERROR;
01145 
01146   /* Check if the given station class is valid */
01147   if ((uint)spec_class >= StationClass::GetClassCount() || spec_class == STAT_CLASS_WAYP) return CMD_ERROR;
01148   if (spec_index >= StationClass::Get(spec_class)->GetSpecCount()) return CMD_ERROR;
01149   if (plat_len == 0 || numtracks == 0) return CMD_ERROR;
01150 
01151   int w_org, h_org;
01152   if (axis == AXIS_X) {
01153     w_org = plat_len;
01154     h_org = numtracks;
01155   } else {
01156     h_org = plat_len;
01157     w_org = numtracks;
01158   }
01159 
01160   bool reuse = (station_to_join != NEW_STATION);
01161   if (!reuse) station_to_join = INVALID_STATION;
01162   bool distant_join = (station_to_join != INVALID_STATION);
01163 
01164   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
01165 
01166   if (h_org > _settings_game.station.station_spread || w_org > _settings_game.station.station_spread) return CMD_ERROR;
01167 
01168   /* these values are those that will be stored in train_tile and station_platforms */
01169   TileArea new_location(tile_org, w_org, h_org);
01170 
01171   /* Make sure the area below consists of clear tiles. (OR tiles belonging to a certain rail station) */
01172   StationID est = INVALID_STATION;
01173   SmallVector<Train *, 4> affected_vehicles;
01174   /* Clear the land below the station. */
01175   CommandCost cost = CheckFlatLandRailStation(new_location, flags, axis, &est, rt, affected_vehicles, spec_class, spec_index, plat_len, numtracks);
01176   if (cost.Failed()) return cost;
01177   /* Add construction expenses. */
01178   cost.AddCost((numtracks * _price[PR_BUILD_STATION_RAIL] + _price[PR_BUILD_STATION_RAIL_LENGTH]) * plat_len);
01179   cost.AddCost(numtracks * plat_len * RailBuildCost(rt));
01180 
01181   Station *st = NULL;
01182   ret = FindJoiningStation(est, station_to_join, adjacent, new_location, &st);
01183   if (ret.Failed()) return ret;
01184 
01185   ret = BuildStationPart(&st, flags, reuse, new_location, STATIONNAMING_RAIL);
01186   if (ret.Failed()) return ret;
01187 
01188   if (st != NULL && st->train_station.tile != INVALID_TILE) {
01189     CommandCost ret = CanExpandRailStation(st, new_location, axis);
01190     if (ret.Failed()) return ret;
01191   }
01192 
01193   /* Check if we can allocate a custom stationspec to this station */
01194   const StationSpec *statspec = StationClass::Get(spec_class)->GetSpec(spec_index);
01195   int specindex = AllocateSpecToStation(statspec, st, (flags & DC_EXEC) != 0);
01196   if (specindex == -1) return_cmd_error(STR_ERROR_TOO_MANY_STATION_SPECS);
01197 
01198   if (statspec != NULL) {
01199     /* Perform NewStation checks */
01200 
01201     /* Check if the station size is permitted */
01202     if (HasBit(statspec->disallowed_platforms, numtracks - 1) || HasBit(statspec->disallowed_lengths, plat_len - 1)) {
01203       return CMD_ERROR;
01204     }
01205 
01206     /* Check if the station is buildable */
01207     if (HasBit(statspec->callback_mask, CBM_STATION_AVAIL)) {
01208       uint16 cb_res = GetStationCallback(CBID_STATION_AVAILABILITY, 0, 0, statspec, NULL, INVALID_TILE);
01209       if (cb_res != CALLBACK_FAILED && !Convert8bitBooleanCallback(statspec->grf_prop.grffile, CBID_STATION_AVAILABILITY, cb_res)) return CMD_ERROR;
01210     }
01211   }
01212 
01213   if (flags & DC_EXEC) {
01214     TileIndexDiff tile_delta;
01215     byte *layout_ptr;
01216     byte numtracks_orig;
01217     Track track;
01218 
01219     st->train_station = new_location;
01220     st->AddFacility(FACIL_TRAIN, new_location.tile);
01221 
01222     st->rect.BeforeAddRect(tile_org, w_org, h_org, StationRect::ADD_TRY);
01223 
01224     if (statspec != NULL) {
01225       /* Include this station spec's animation trigger bitmask
01226        * in the station's cached copy. */
01227       st->cached_anim_triggers |= statspec->animation.triggers;
01228     }
01229 
01230     tile_delta = (axis == AXIS_X ? TileDiffXY(1, 0) : TileDiffXY(0, 1));
01231     track = AxisToTrack(axis);
01232 
01233     layout_ptr = AllocaM(byte, numtracks * plat_len);
01234     GetStationLayout(layout_ptr, numtracks, plat_len, statspec);
01235 
01236     numtracks_orig = numtracks;
01237 
01238     Company *c = Company::Get(st->owner);
01239     TileIndex tile_track = tile_org;
01240     do {
01241       TileIndex tile = tile_track;
01242       int w = plat_len;
01243       do {
01244         byte layout = *layout_ptr++;
01245         if (IsRailStationTile(tile) && HasStationReservation(tile)) {
01246           /* Check for trains having a reservation for this tile. */
01247           Train *v = GetTrainForReservation(tile, AxisToTrack(GetRailStationAxis(tile)));
01248           if (v != NULL) {
01249             FreeTrainTrackReservation(v);
01250             *affected_vehicles.Append() = v;
01251             if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), false);
01252             for (; v->Next() != NULL; v = v->Next()) { }
01253             if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), false);
01254           }
01255         }
01256 
01257         /* Railtype can change when overbuilding. */
01258         if (IsRailStationTile(tile)) {
01259           if (!IsStationTileBlocked(tile)) c->infrastructure.rail[GetRailType(tile)]--;
01260           c->infrastructure.station--;
01261         }
01262 
01263         /* Remove animation if overbuilding */
01264         DeleteAnimatedTile(tile);
01265         byte old_specindex = HasStationTileRail(tile) ? GetCustomStationSpecIndex(tile) : 0;
01266         MakeRailStation(tile, st->owner, st->index, axis, layout & ~1, rt);
01267         /* Free the spec if we overbuild something */
01268         DeallocateSpecFromStation(st, old_specindex);
01269 
01270         SetCustomStationSpecIndex(tile, specindex);
01271         SetStationTileRandomBits(tile, GB(Random(), 0, 4));
01272         SetAnimationFrame(tile, 0);
01273 
01274         if (!IsStationTileBlocked(tile)) c->infrastructure.rail[rt]++;
01275         c->infrastructure.station++;
01276 
01277         if (statspec != NULL) {
01278           /* Use a fixed axis for GetPlatformInfo as our platforms / numtracks are always the right way around */
01279           uint32 platinfo = GetPlatformInfo(AXIS_X, GetStationGfx(tile), plat_len, numtracks_orig, plat_len - w, numtracks_orig - numtracks, false);
01280 
01281           /* As the station is not yet completely finished, the station does not yet exist. */
01282           uint16 callback = GetStationCallback(CBID_STATION_TILE_LAYOUT, platinfo, 0, statspec, NULL, tile);
01283           if (callback != CALLBACK_FAILED) {
01284             if (callback < 8) {
01285               SetStationGfx(tile, (callback & ~1) + axis);
01286             } else {
01287               ErrorUnknownCallbackResult(statspec->grf_prop.grffile->grfid, CBID_STATION_TILE_LAYOUT, callback);
01288             }
01289           }
01290 
01291           /* Trigger station animation -- after building? */
01292           TriggerStationAnimation(st, tile, SAT_BUILT);
01293         }
01294 
01295         tile += tile_delta;
01296       } while (--w);
01297       AddTrackToSignalBuffer(tile_track, track, _current_company);
01298       YapfNotifyTrackLayoutChange(tile_track, track);
01299       tile_track += tile_delta ^ TileDiffXY(1, 1); // perpendicular to tile_delta
01300     } while (--numtracks);
01301 
01302     for (uint i = 0; i < affected_vehicles.Length(); ++i) {
01303       /* Restore reservations of trains. */
01304       Train *v = affected_vehicles[i];
01305       if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), true);
01306       TryPathReserve(v, true, true);
01307       for (; v->Next() != NULL; v = v->Next()) { }
01308       if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), true);
01309     }
01310 
01311     /* Check whether we need to expand the reservation of trains already on the station. */
01312     TileArea update_reservation_area;
01313     if (axis == AXIS_X) {
01314       update_reservation_area = TileArea(tile_org, 1, numtracks_orig);
01315     } else {
01316       update_reservation_area = TileArea(tile_org, numtracks_orig, 1);
01317     }
01318 
01319     TILE_AREA_LOOP(tile, update_reservation_area) {
01320       DiagDirection dir = AxisToDiagDir(axis);
01321       TileIndexDiff tile_offset = TileOffsByDiagDir(dir);
01322       TileIndex platform_begin = tile;
01323       TileIndex platform_end = tile;
01324 
01325       /* We can only account for tiles that are reachable from this tile, so ignore primarily blocked tiles while finding the platform begin and end. */
01326       for (TileIndex next_tile = platform_begin - tile_offset; IsCompatibleTrainStationTile(next_tile, platform_begin); next_tile -= tile_offset) {
01327         platform_begin = next_tile;
01328       }
01329       for (TileIndex next_tile = platform_end + tile_offset; IsCompatibleTrainStationTile(next_tile, platform_end); next_tile += tile_offset) {
01330         platform_end = next_tile;
01331       }
01332 
01333       /* If there is at least on reservation on the platform, we reserve the whole platform. */
01334       bool reservation = false;
01335       for (TileIndex t = platform_begin; !reservation && t <= platform_end; t += tile_offset) {
01336         reservation = HasStationReservation(t);
01337       }
01338 
01339       if (reservation) {
01340         SetRailStationPlatformReservation(platform_begin, dir, true);
01341       }
01342     }
01343 
01344     st->MarkTilesDirty(false);
01345     st->UpdateVirtCoord();
01346     UpdateStationAcceptance(st, false);
01347     st->RecomputeIndustriesNear();
01348     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
01349     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
01350     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_TRAINS);
01351     DirtyCompanyInfrastructureWindows(st->owner);
01352   }
01353 
01354   return cost;
01355 }
01356 
01357 static void MakeRailStationAreaSmaller(BaseStation *st)
01358 {
01359   TileArea ta = st->train_station;
01360 
01361 restart:
01362 
01363   /* too small? */
01364   if (ta.w != 0 && ta.h != 0) {
01365     /* check the left side, x = constant, y changes */
01366     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(0, i));) {
01367       /* the left side is unused? */
01368       if (++i == ta.h) {
01369         ta.tile += TileDiffXY(1, 0);
01370         ta.w--;
01371         goto restart;
01372       }
01373     }
01374 
01375     /* check the right side, x = constant, y changes */
01376     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(ta.w - 1, i));) {
01377       /* the right side is unused? */
01378       if (++i == ta.h) {
01379         ta.w--;
01380         goto restart;
01381       }
01382     }
01383 
01384     /* check the upper side, y = constant, x changes */
01385     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(i, 0));) {
01386       /* the left side is unused? */
01387       if (++i == ta.w) {
01388         ta.tile += TileDiffXY(0, 1);
01389         ta.h--;
01390         goto restart;
01391       }
01392     }
01393 
01394     /* check the lower side, y = constant, x changes */
01395     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(i, ta.h - 1));) {
01396       /* the left side is unused? */
01397       if (++i == ta.w) {
01398         ta.h--;
01399         goto restart;
01400       }
01401     }
01402   } else {
01403     ta.Clear();
01404   }
01405 
01406   st->train_station = ta;
01407 }
01408 
01419 template <class T>
01420 CommandCost RemoveFromRailBaseStation(TileArea ta, SmallVector<T *, 4> &affected_stations, DoCommandFlag flags, Money removal_cost, bool keep_rail)
01421 {
01422   /* Count of the number of tiles removed */
01423   int quantity = 0;
01424   CommandCost total_cost(EXPENSES_CONSTRUCTION);
01425   /* Accumulator for the errors seen during clearing. If no errors happen,
01426    * and the quantity is 0 there is no station. Otherwise it will be one
01427    * of the other error that got accumulated. */
01428   CommandCost error;
01429 
01430   /* Do the action for every tile into the area */
01431   TILE_AREA_LOOP(tile, ta) {
01432     /* Make sure the specified tile is a rail station */
01433     if (!HasStationTileRail(tile)) continue;
01434 
01435     /* If there is a vehicle on ground, do not allow to remove (flood) the tile */
01436     CommandCost ret = EnsureNoVehicleOnGround(tile);
01437     error.AddCost(ret);
01438     if (ret.Failed()) continue;
01439 
01440     /* Check ownership of station */
01441     T *st = T::GetByTile(tile);
01442     if (st == NULL) continue;
01443 
01444     if (_current_company != OWNER_WATER) {
01445       CommandCost ret = CheckOwnership(st->owner);
01446       error.AddCost(ret);
01447       if (ret.Failed()) continue;
01448     }
01449 
01450     /* If we reached here, the tile is valid so increase the quantity of tiles we will remove */
01451     quantity++;
01452 
01453     if (keep_rail || IsStationTileBlocked(tile)) {
01454       /* Don't refund the 'steel' of the track when we keep the
01455        *  rail, or when the tile didn't have any rail at all. */
01456       total_cost.AddCost(-_price[PR_CLEAR_RAIL]);
01457     }
01458 
01459     if (flags & DC_EXEC) {
01460       /* read variables before the station tile is removed */
01461       uint specindex = GetCustomStationSpecIndex(tile);
01462       Track track = GetRailStationTrack(tile);
01463       Owner owner = GetTileOwner(tile);
01464       RailType rt = GetRailType(tile);
01465       Train *v = NULL;
01466 
01467       if (HasStationReservation(tile)) {
01468         v = GetTrainForReservation(tile, track);
01469         if (v != NULL) {
01470           /* Free train reservation. */
01471           FreeTrainTrackReservation(v);
01472           if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), false);
01473           Vehicle *temp = v;
01474           for (; temp->Next() != NULL; temp = temp->Next()) { }
01475           if (IsRailStationTile(temp->tile)) SetRailStationPlatformReservation(temp->tile, TrackdirToExitdir(ReverseTrackdir(temp->GetVehicleTrackdir())), false);
01476         }
01477       }
01478 
01479       bool build_rail = keep_rail && !IsStationTileBlocked(tile);
01480       if (!build_rail && !IsStationTileBlocked(tile)) Company::Get(owner)->infrastructure.rail[rt]--;
01481 
01482       DoClearSquare(tile);
01483       DeleteNewGRFInspectWindow(GSF_STATIONS, tile);
01484       if (build_rail) MakeRailNormal(tile, owner, TrackToTrackBits(track), rt);
01485       Company::Get(owner)->infrastructure.station--;
01486       DirtyCompanyInfrastructureWindows(owner);
01487 
01488       st->rect.AfterRemoveTile(st, tile);
01489       AddTrackToSignalBuffer(tile, track, owner);
01490       YapfNotifyTrackLayoutChange(tile, track);
01491 
01492       DeallocateSpecFromStation(st, specindex);
01493 
01494       affected_stations.Include(st);
01495 
01496       if (v != NULL) {
01497         /* Restore station reservation. */
01498         if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), true);
01499         TryPathReserve(v, true, true);
01500         for (; v->Next() != NULL; v = v->Next()) { }
01501         if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), true);
01502       }
01503     }
01504   }
01505 
01506   if (quantity == 0) return error.Failed() ? error : CommandCost(STR_ERROR_THERE_IS_NO_STATION);
01507 
01508   for (T **stp = affected_stations.Begin(); stp != affected_stations.End(); stp++) {
01509     T *st = *stp;
01510 
01511     /* now we need to make the "spanned" area of the railway station smaller
01512      * if we deleted something at the edges.
01513      * we also need to adjust train_tile. */
01514     MakeRailStationAreaSmaller(st);
01515     UpdateStationSignCoord(st);
01516 
01517     /* if we deleted the whole station, delete the train facility. */
01518     if (st->train_station.tile == INVALID_TILE) {
01519       st->facilities &= ~FACIL_TRAIN;
01520       SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_TRAINS);
01521       st->UpdateVirtCoord();
01522       DeleteStationIfEmpty(st);
01523     }
01524   }
01525 
01526   total_cost.AddCost(quantity * removal_cost);
01527   return total_cost;
01528 }
01529 
01541 CommandCost CmdRemoveFromRailStation(TileIndex start, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01542 {
01543   TileIndex end = p1 == 0 ? start : p1;
01544   if (start >= MapSize() || end >= MapSize()) return CMD_ERROR;
01545 
01546   TileArea ta(start, end);
01547   SmallVector<Station *, 4> affected_stations;
01548 
01549   CommandCost ret = RemoveFromRailBaseStation(ta, affected_stations, flags, _price[PR_CLEAR_STATION_RAIL], HasBit(p2, 0));
01550   if (ret.Failed()) return ret;
01551 
01552   /* Do all station specific functions here. */
01553   for (Station **stp = affected_stations.Begin(); stp != affected_stations.End(); stp++) {
01554     Station *st = *stp;
01555 
01556     if (st->train_station.tile == INVALID_TILE) SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_TRAINS);
01557     st->MarkTilesDirty(false);
01558     st->RecomputeIndustriesNear();
01559   }
01560 
01561   /* Now apply the rail cost to the number that we deleted */
01562   return ret;
01563 }
01564 
01576 CommandCost CmdRemoveFromRailWaypoint(TileIndex start, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01577 {
01578   TileIndex end = p1 == 0 ? start : p1;
01579   if (start >= MapSize() || end >= MapSize()) return CMD_ERROR;
01580 
01581   TileArea ta(start, end);
01582   SmallVector<Waypoint *, 4> affected_stations;
01583 
01584   return RemoveFromRailBaseStation(ta, affected_stations, flags, _price[PR_CLEAR_WAYPOINT_RAIL], HasBit(p2, 0));
01585 }
01586 
01587 
01595 template <class T>
01596 CommandCost RemoveRailStation(T *st, DoCommandFlag flags)
01597 {
01598   /* Current company owns the station? */
01599   if (_current_company != OWNER_WATER) {
01600     CommandCost ret = CheckOwnership(st->owner);
01601     if (ret.Failed()) return ret;
01602   }
01603 
01604   /* determine width and height of platforms */
01605   TileArea ta = st->train_station;
01606 
01607   assert(ta.w != 0 && ta.h != 0);
01608 
01609   CommandCost cost(EXPENSES_CONSTRUCTION);
01610   /* clear all areas of the station */
01611   TILE_AREA_LOOP(tile, ta) {
01612     /* only remove tiles that are actually train station tiles */
01613     if (!st->TileBelongsToRailStation(tile)) continue;
01614 
01615     CommandCost ret = EnsureNoVehicleOnGround(tile);
01616     if (ret.Failed()) return ret;
01617 
01618     cost.AddCost(_price[PR_CLEAR_STATION_RAIL]);
01619     if (flags & DC_EXEC) {
01620       /* read variables before the station tile is removed */
01621       Track track = GetRailStationTrack(tile);
01622       Owner owner = GetTileOwner(tile); // _current_company can be OWNER_WATER
01623       Train *v = NULL;
01624       if (HasStationReservation(tile)) {
01625         v = GetTrainForReservation(tile, track);
01626         if (v != NULL) FreeTrainTrackReservation(v);
01627       }
01628       if (!IsStationTileBlocked(tile)) Company::Get(owner)->infrastructure.rail[GetRailType(tile)]--;
01629       Company::Get(owner)->infrastructure.station--;
01630       DoClearSquare(tile);
01631       DeleteNewGRFInspectWindow(GSF_STATIONS, tile);
01632       AddTrackToSignalBuffer(tile, track, owner);
01633       YapfNotifyTrackLayoutChange(tile, track);
01634       if (v != NULL) TryPathReserve(v, true);
01635     }
01636   }
01637 
01638   if (flags & DC_EXEC) {
01639     st->rect.AfterRemoveRect(st, st->train_station);
01640 
01641     st->train_station.Clear();
01642 
01643     st->facilities &= ~FACIL_TRAIN;
01644 
01645     free(st->speclist);
01646     st->num_specs = 0;
01647     st->speclist  = NULL;
01648     st->cached_anim_triggers = 0;
01649 
01650     DirtyCompanyInfrastructureWindows(st->owner);
01651     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_TRAINS);
01652     st->UpdateVirtCoord();
01653     DeleteStationIfEmpty(st);
01654   }
01655 
01656   return cost;
01657 }
01658 
01665 static CommandCost RemoveRailStation(TileIndex tile, DoCommandFlag flags)
01666 {
01667   /* if there is flooding, remove platforms tile by tile */
01668   if (_current_company == OWNER_WATER) {
01669     return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAIL_STATION);
01670   }
01671 
01672   Station *st = Station::GetByTile(tile);
01673   CommandCost cost = RemoveRailStation(st, flags);
01674 
01675   if (flags & DC_EXEC) st->RecomputeIndustriesNear();
01676 
01677   return cost;
01678 }
01679 
01686 static CommandCost RemoveRailWaypoint(TileIndex tile, DoCommandFlag flags)
01687 {
01688   /* if there is flooding, remove waypoints tile by tile */
01689   if (_current_company == OWNER_WATER) {
01690     return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAIL_WAYPOINT);
01691   }
01692 
01693   return RemoveRailStation(Waypoint::GetByTile(tile), flags);
01694 }
01695 
01696 
01702 static RoadStop **FindRoadStopSpot(bool truck_station, Station *st)
01703 {
01704   RoadStop **primary_stop = (truck_station) ? &st->truck_stops : &st->bus_stops;
01705 
01706   if (*primary_stop == NULL) {
01707     /* we have no roadstop of the type yet, so write a "primary stop" */
01708     return primary_stop;
01709   } else {
01710     /* there are stops already, so append to the end of the list */
01711     RoadStop *stop = *primary_stop;
01712     while (stop->next != NULL) stop = stop->next;
01713     return &stop->next;
01714   }
01715 }
01716 
01717 static CommandCost RemoveRoadStop(TileIndex tile, DoCommandFlag flags);
01718 
01728 static CommandCost FindJoiningRoadStop(StationID existing_stop, StationID station_to_join, bool adjacent, TileArea ta, Station **st)
01729 {
01730   return FindJoiningBaseStation<Station, STR_ERROR_MUST_REMOVE_ROAD_STOP_FIRST>(existing_stop, station_to_join, adjacent, ta, st);
01731 }
01732 
01748 CommandCost CmdBuildRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01749 {
01750   bool type = HasBit(p2, 0);
01751   bool is_drive_through = HasBit(p2, 1);
01752   RoadTypes rts = Extract<RoadTypes, 2, 2>(p2);
01753   StationID station_to_join = GB(p2, 16, 16);
01754   bool reuse = (station_to_join != NEW_STATION);
01755   if (!reuse) station_to_join = INVALID_STATION;
01756   bool distant_join = (station_to_join != INVALID_STATION);
01757 
01758   uint8 width = (uint8)GB(p1, 0, 8);
01759   uint8 lenght = (uint8)GB(p1, 8, 8);
01760 
01761   /* Check if the requested road stop is too big */
01762   if (width > _settings_game.station.station_spread || lenght > _settings_game.station.station_spread) return_cmd_error(STR_ERROR_STATION_TOO_SPREAD_OUT);
01763   /* Check for incorrect width / length. */
01764   if (width == 0 || lenght == 0) return CMD_ERROR;
01765   /* Check if the first tile and the last tile are valid */
01766   if (!IsValidTile(tile) || TileAddWrap(tile, width - 1, lenght - 1) == INVALID_TILE) return CMD_ERROR;
01767 
01768   TileArea roadstop_area(tile, width, lenght);
01769 
01770   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
01771 
01772   if (!HasExactlyOneBit(rts) || !HasRoadTypesAvail(_current_company, rts)) return CMD_ERROR;
01773 
01774   /* Trams only have drive through stops */
01775   if (!is_drive_through && HasBit(rts, ROADTYPE_TRAM)) return CMD_ERROR;
01776 
01777   DiagDirection ddir = Extract<DiagDirection, 6, 2>(p2);
01778 
01779   /* Safeguard the parameters. */
01780   if (!IsValidDiagDirection(ddir)) return CMD_ERROR;
01781   /* If it is a drive-through stop, check for valid axis. */
01782   if (is_drive_through && !IsValidAxis((Axis)ddir)) return CMD_ERROR;
01783 
01784   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile, flags);
01785   if (ret.Failed()) return ret;
01786 
01787   /* Total road stop cost. */
01788   CommandCost cost(EXPENSES_CONSTRUCTION, roadstop_area.w * roadstop_area.h * _price[type ? PR_BUILD_STATION_TRUCK : PR_BUILD_STATION_BUS]);
01789   StationID est = INVALID_STATION;
01790   ret = CheckFlatLandRoadStop(roadstop_area, flags, is_drive_through ? 5 << ddir : 1 << ddir, is_drive_through, type, DiagDirToAxis(ddir), &est, rts);
01791   if (ret.Failed()) return ret;
01792   cost.AddCost(ret);
01793 
01794   Station *st = NULL;
01795   ret = FindJoiningRoadStop(est, station_to_join, HasBit(p2, 5), roadstop_area, &st);
01796   if (ret.Failed()) return ret;
01797 
01798   /* Check if this number of road stops can be allocated. */
01799   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);
01800 
01801   ret = BuildStationPart(&st, flags, reuse, roadstop_area, STATIONNAMING_ROAD);
01802   if (ret.Failed()) return ret;
01803 
01804   if (flags & DC_EXEC) {
01805     /* Check every tile in the area. */
01806     TILE_AREA_LOOP(cur_tile, roadstop_area) {
01807       RoadTypes cur_rts = GetRoadTypes(cur_tile);
01808       Owner road_owner = HasBit(cur_rts, ROADTYPE_ROAD) ? GetRoadOwner(cur_tile, ROADTYPE_ROAD) : _current_company;
01809       Owner tram_owner = HasBit(cur_rts, ROADTYPE_TRAM) ? GetRoadOwner(cur_tile, ROADTYPE_TRAM) : _current_company;
01810 
01811       if (IsTileType(cur_tile, MP_STATION) && IsRoadStop(cur_tile)) {
01812         RemoveRoadStop(cur_tile, flags);
01813       }
01814 
01815       RoadStop *road_stop = new RoadStop(cur_tile);
01816       /* Insert into linked list of RoadStops. */
01817       RoadStop **currstop = FindRoadStopSpot(type, st);
01818       *currstop = road_stop;
01819 
01820       if (type) {
01821         st->truck_station.Add(cur_tile);
01822       } else {
01823         st->bus_station.Add(cur_tile);
01824       }
01825 
01826       /* Initialize an empty station. */
01827       st->AddFacility((type) ? FACIL_TRUCK_STOP : FACIL_BUS_STOP, cur_tile);
01828 
01829       st->rect.BeforeAddTile(cur_tile, StationRect::ADD_TRY);
01830 
01831       RoadStopType rs_type = type ? ROADSTOP_TRUCK : ROADSTOP_BUS;
01832       if (is_drive_through) {
01833         /* Update company infrastructure counts. If the current tile is a normal
01834          * road tile, count only the new road bits needed to get a full diagonal road. */
01835         RoadType rt;
01836         FOR_EACH_SET_ROADTYPE(rt, cur_rts | rts) {
01837           Company *c = Company::GetIfValid(rt == ROADTYPE_ROAD ? road_owner : tram_owner);
01838           if (c != NULL) {
01839             c->infrastructure.road[rt] += 2 - (IsNormalRoadTile(cur_tile) && HasBit(cur_rts, rt) ? CountBits(GetRoadBits(cur_tile, rt)) : 0);
01840             DirtyCompanyInfrastructureWindows(c->index);
01841           }
01842         }
01843 
01844         MakeDriveThroughRoadStop(cur_tile, st->owner, road_owner, tram_owner, st->index, rs_type, rts | cur_rts, DiagDirToAxis(ddir));
01845         road_stop->MakeDriveThrough();
01846       } else {
01847         /* Non-drive-through stop never overbuild and always count as two road bits. */
01848         Company::Get(st->owner)->infrastructure.road[FIND_FIRST_BIT(rts)] += 2;
01849         MakeRoadStop(cur_tile, st->owner, st->index, rs_type, rts, ddir);
01850       }
01851       Company::Get(st->owner)->infrastructure.station++;
01852       DirtyCompanyInfrastructureWindows(st->owner);
01853 
01854       MarkTileDirtyByTile(cur_tile);
01855     }
01856   }
01857 
01858   if (st != NULL) {
01859     st->UpdateVirtCoord();
01860     UpdateStationAcceptance(st, false);
01861     st->RecomputeIndustriesNear();
01862     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
01863     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
01864     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_ROADVEHS);
01865   }
01866   return cost;
01867 }
01868 
01869 
01870 static Vehicle *ClearRoadStopStatusEnum(Vehicle *v, void *)
01871 {
01872   if (v->type == VEH_ROAD) {
01873     /* Okay... we are a road vehicle on a drive through road stop.
01874      * But that road stop has just been removed, so we need to make
01875      * sure we are in a valid state... however, vehicles can also
01876      * turn on road stop tiles, so only clear the 'road stop' state
01877      * bits and only when the state was 'in road stop', otherwise
01878      * we'll end up clearing the turn around bits. */
01879     RoadVehicle *rv = RoadVehicle::From(v);
01880     if (HasBit(rv->state, RVS_IN_DT_ROAD_STOP)) rv->state &= RVSB_ROAD_STOP_TRACKDIR_MASK;
01881   }
01882 
01883   return NULL;
01884 }
01885 
01886 
01893 static CommandCost RemoveRoadStop(TileIndex tile, DoCommandFlag flags)
01894 {
01895   Station *st = Station::GetByTile(tile);
01896 
01897   if (_current_company != OWNER_WATER) {
01898     CommandCost ret = CheckOwnership(st->owner);
01899     if (ret.Failed()) return ret;
01900   }
01901 
01902   bool is_truck = IsTruckStop(tile);
01903 
01904   RoadStop **primary_stop;
01905   RoadStop *cur_stop;
01906   if (is_truck) { // truck stop
01907     primary_stop = &st->truck_stops;
01908     cur_stop = RoadStop::GetByTile(tile, ROADSTOP_TRUCK);
01909   } else {
01910     primary_stop = &st->bus_stops;
01911     cur_stop = RoadStop::GetByTile(tile, ROADSTOP_BUS);
01912   }
01913 
01914   assert(cur_stop != NULL);
01915 
01916   /* don't do the check for drive-through road stops when company bankrupts */
01917   if (IsDriveThroughStopTile(tile) && (flags & DC_BANKRUPT)) {
01918     /* remove the 'going through road stop' status from all vehicles on that tile */
01919     if (flags & DC_EXEC) FindVehicleOnPos(tile, NULL, &ClearRoadStopStatusEnum);
01920   } else {
01921     CommandCost ret = EnsureNoVehicleOnGround(tile);
01922     if (ret.Failed()) return ret;
01923   }
01924 
01925   if (flags & DC_EXEC) {
01926     if (*primary_stop == cur_stop) {
01927       /* removed the first stop in the list */
01928       *primary_stop = cur_stop->next;
01929       /* removed the only stop? */
01930       if (*primary_stop == NULL) {
01931         st->facilities &= (is_truck ? ~FACIL_TRUCK_STOP : ~FACIL_BUS_STOP);
01932       }
01933     } else {
01934       /* tell the predecessor in the list to skip this stop */
01935       RoadStop *pred = *primary_stop;
01936       while (pred->next != cur_stop) pred = pred->next;
01937       pred->next = cur_stop->next;
01938     }
01939 
01940     /* Update company infrastructure counts. */
01941     RoadType rt;
01942     FOR_EACH_SET_ROADTYPE(rt, GetRoadTypes(tile)) {
01943       Company *c = Company::GetIfValid(GetRoadOwner(tile, rt));
01944       if (c != NULL) {
01945         c->infrastructure.road[rt] -= 2;
01946         DirtyCompanyInfrastructureWindows(c->index);
01947       }
01948     }
01949     Company::Get(st->owner)->infrastructure.station--;
01950 
01951     if (IsDriveThroughStopTile(tile)) {
01952       /* Clears the tile for us */
01953       cur_stop->ClearDriveThrough();
01954     } else {
01955       DoClearSquare(tile);
01956     }
01957 
01958     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_ROADVEHS);
01959     delete cur_stop;
01960 
01961     /* Make sure no vehicle is going to the old roadstop */
01962     RoadVehicle *v;
01963     FOR_ALL_ROADVEHICLES(v) {
01964       if (v->First() == v && v->current_order.IsType(OT_GOTO_STATION) &&
01965           v->dest_tile == tile) {
01966         v->dest_tile = v->GetOrderStationLocation(st->index);
01967       }
01968     }
01969 
01970     st->rect.AfterRemoveTile(st, tile);
01971 
01972     st->UpdateVirtCoord();
01973     st->RecomputeIndustriesNear();
01974     DeleteStationIfEmpty(st);
01975 
01976     /* Update the tile area of the truck/bus stop */
01977     if (is_truck) {
01978       st->truck_station.Clear();
01979       for (const RoadStop *rs = st->truck_stops; rs != NULL; rs = rs->next) st->truck_station.Add(rs->xy);
01980     } else {
01981       st->bus_station.Clear();
01982       for (const RoadStop *rs = st->bus_stops; rs != NULL; rs = rs->next) st->bus_station.Add(rs->xy);
01983     }
01984   }
01985 
01986   return CommandCost(EXPENSES_CONSTRUCTION, _price[is_truck ? PR_CLEAR_STATION_TRUCK : PR_CLEAR_STATION_BUS]);
01987 }
01988 
01999 CommandCost CmdRemoveRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
02000 {
02001   uint8 width = (uint8)GB(p1, 0, 8);
02002   uint8 height = (uint8)GB(p1, 8, 8);
02003 
02004   /* Check for incorrect width / height. */
02005   if (width == 0 || height == 0) return CMD_ERROR;
02006   /* Check if the first tile and the last tile are valid */
02007   if (!IsValidTile(tile) || TileAddWrap(tile, width - 1, height - 1) == INVALID_TILE) return CMD_ERROR;
02008 
02009   TileArea roadstop_area(tile, width, height);
02010 
02011   int quantity = 0;
02012   CommandCost cost(EXPENSES_CONSTRUCTION);
02013   TILE_AREA_LOOP(cur_tile, roadstop_area) {
02014     /* Make sure the specified tile is a road stop of the correct type */
02015     if (!IsTileType(cur_tile, MP_STATION) || !IsRoadStop(cur_tile) || (uint32)GetRoadStopType(cur_tile) != GB(p2, 0, 1)) continue;
02016 
02017     /* Save the stop info before it is removed */
02018     bool is_drive_through = IsDriveThroughStopTile(cur_tile);
02019     RoadTypes rts = GetRoadTypes(cur_tile);
02020     RoadBits road_bits = IsDriveThroughStopTile(cur_tile) ?
02021         ((GetRoadStopDir(cur_tile) == DIAGDIR_NE) ? ROAD_X : ROAD_Y) :
02022         DiagDirToRoadBits(GetRoadStopDir(cur_tile));
02023 
02024     Owner road_owner = GetRoadOwner(cur_tile, ROADTYPE_ROAD);
02025     Owner tram_owner = GetRoadOwner(cur_tile, ROADTYPE_TRAM);
02026     CommandCost ret = RemoveRoadStop(cur_tile, flags);
02027     if (ret.Failed()) return ret;
02028     cost.AddCost(ret);
02029 
02030     quantity++;
02031     /* If the stop was a drive-through stop replace the road */
02032     if ((flags & DC_EXEC) && is_drive_through) {
02033       MakeRoadNormal(cur_tile, road_bits, rts, ClosestTownFromTile(cur_tile, UINT_MAX)->index,
02034           road_owner, tram_owner);
02035 
02036       /* Update company infrastructure counts. */
02037       RoadType rt;
02038       FOR_EACH_SET_ROADTYPE(rt, rts) {
02039         Company *c = Company::GetIfValid(GetRoadOwner(cur_tile, rt));
02040         if (c != NULL) {
02041           c->infrastructure.road[rt] += CountBits(road_bits);
02042           DirtyCompanyInfrastructureWindows(c->index);
02043         }
02044       }
02045     }
02046   }
02047 
02048   if (quantity == 0) return_cmd_error(STR_ERROR_THERE_IS_NO_STATION);
02049 
02050   return cost;
02051 }
02052 
02059 static uint GetMinimalAirportDistanceToTile(TileIterator &it, TileIndex town_tile)
02060 {
02061   uint mindist = UINT_MAX;
02062 
02063   for (TileIndex cur_tile = it; cur_tile != INVALID_TILE; cur_tile = ++it) {
02064     mindist = min(mindist, DistanceManhattan(town_tile, cur_tile));
02065   }
02066 
02067   return mindist;
02068 }
02069 
02079 uint8 GetAirportNoiseLevelForTown(const AirportSpec *as, TileIterator &it, TileIndex town_tile)
02080 {
02081   /* 0 cannot be accounted, and 1 is the lowest that can be reduced from town.
02082    * So no need to go any further*/
02083   if (as->noise_level < 2) return as->noise_level;
02084 
02085   uint distance = GetMinimalAirportDistanceToTile(it, town_tile);
02086 
02087   /* The steps for measuring noise reduction are based on the "magical" (and arbitrary) 8 base distance
02088    * adding the town_council_tolerance 4 times, as a way to graduate, depending of the tolerance.
02089    * Basically, it says that the less tolerant a town is, the bigger the distance before
02090    * an actual decrease can be granted */
02091   uint8 town_tolerance_distance = 8 + (_settings_game.difficulty.town_council_tolerance * 4);
02092 
02093   /* now, we want to have the distance segmented using the distance judged bareable by town
02094    * This will give us the coefficient of reduction the distance provides. */
02095   uint noise_reduction = distance / town_tolerance_distance;
02096 
02097   /* If the noise reduction equals the airport noise itself, don't give it for free.
02098    * Otherwise, simply reduce the airport's level. */
02099   return noise_reduction >= as->noise_level ? 1 : as->noise_level - noise_reduction;
02100 }
02101 
02109 Town *AirportGetNearestTown(const AirportSpec *as, const TileIterator &it)
02110 {
02111   Town *t, *nearest = NULL;
02112   uint add = as->size_x + as->size_y - 2; // GetMinimalAirportDistanceToTile can differ from DistanceManhattan by this much
02113   uint mindist = UINT_MAX - add; // prevent overflow
02114   FOR_ALL_TOWNS(t) {
02115     if (DistanceManhattan(t->xy, it) < mindist + add) { // avoid calling GetMinimalAirportDistanceToTile too often
02116       TileIterator *copy = it.Clone();
02117       uint dist = GetMinimalAirportDistanceToTile(*copy, t->xy);
02118       delete copy;
02119       if (dist < mindist) {
02120         nearest = t;
02121         mindist = dist;
02122       }
02123     }
02124   }
02125 
02126   return nearest;
02127 }
02128 
02129 
02131 void UpdateAirportsNoise()
02132 {
02133   Town *t;
02134   const Station *st;
02135 
02136   FOR_ALL_TOWNS(t) t->noise_reached = 0;
02137 
02138   FOR_ALL_STATIONS(st) {
02139     if (st->airport.tile != INVALID_TILE && st->airport.type != AT_OILRIG) {
02140       const AirportSpec *as = st->airport.GetSpec();
02141       AirportTileIterator it(st);
02142       Town *nearest = AirportGetNearestTown(as, it);
02143       nearest->noise_reached += GetAirportNoiseLevelForTown(as, it, nearest->xy);
02144     }
02145   }
02146 }
02147 
02161 CommandCost CmdBuildAirport(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
02162 {
02163   StationID station_to_join = GB(p2, 16, 16);
02164   bool reuse = (station_to_join != NEW_STATION);
02165   if (!reuse) station_to_join = INVALID_STATION;
02166   bool distant_join = (station_to_join != INVALID_STATION);
02167   byte airport_type = GB(p1, 0, 8);
02168   byte layout = GB(p1, 8, 8);
02169 
02170   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
02171 
02172   if (airport_type >= NUM_AIRPORTS) return CMD_ERROR;
02173 
02174   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile, flags);
02175   if (ret.Failed()) return ret;
02176 
02177   /* Check if a valid, buildable airport was chosen for construction */
02178   const AirportSpec *as = AirportSpec::Get(airport_type);
02179   if (!as->IsAvailable() || layout >= as->num_table) return CMD_ERROR;
02180 
02181   Direction rotation = as->rotation[layout];
02182   int w = as->size_x;
02183   int h = as->size_y;
02184   if (rotation == DIR_E || rotation == DIR_W) Swap(w, h);
02185   TileArea airport_area = TileArea(tile, w, h);
02186 
02187   if (w > _settings_game.station.station_spread || h > _settings_game.station.station_spread) {
02188     return_cmd_error(STR_ERROR_STATION_TOO_SPREAD_OUT);
02189   }
02190 
02191   CommandCost cost = CheckFlatLand(airport_area, flags);
02192   if (cost.Failed()) return cost;
02193 
02194   /* The noise level is the noise from the airport and reduce it to account for the distance to the town center. */
02195   AirportTileTableIterator iter(as->table[layout], tile);
02196   Town *nearest = AirportGetNearestTown(as, iter);
02197   uint newnoise_level = GetAirportNoiseLevelForTown(as, iter, nearest->xy);
02198 
02199   /* Check if local auth would allow a new airport */
02200   StringID authority_refuse_message = STR_NULL;
02201   Town *authority_refuse_town = NULL;
02202 
02203   if (_settings_game.economy.station_noise_level) {
02204     /* do not allow to build a new airport if this raise the town noise over the maximum allowed by town */
02205     if ((nearest->noise_reached + newnoise_level) > nearest->MaxTownNoise()) {
02206       authority_refuse_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_NOISE;
02207       authority_refuse_town = nearest;
02208     }
02209   } else {
02210     Town *t = ClosestTownFromTile(tile, UINT_MAX);
02211     uint num = 0;
02212     const Station *st;
02213     FOR_ALL_STATIONS(st) {
02214       if (st->town == t && (st->facilities & FACIL_AIRPORT) && st->airport.type != AT_OILRIG) num++;
02215     }
02216     if (num >= 2) {
02217       authority_refuse_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_AIRPORT;
02218       authority_refuse_town = t;
02219     }
02220   }
02221 
02222   if (authority_refuse_message != STR_NULL) {
02223     SetDParam(0, authority_refuse_town->index);
02224     return_cmd_error(authority_refuse_message);
02225   }
02226 
02227   Station *st = NULL;
02228   ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p2, 0), airport_area, &st);
02229   if (ret.Failed()) return ret;
02230 
02231   /* Distant join */
02232   if (st == NULL && distant_join) st = Station::GetIfValid(station_to_join);
02233 
02234   ret = BuildStationPart(&st, flags, reuse, airport_area, (GetAirport(airport_type)->flags & AirportFTAClass::AIRPLANES) ? STATIONNAMING_AIRPORT : STATIONNAMING_HELIPORT);
02235   if (ret.Failed()) return ret;
02236 
02237   if (st != NULL && st->airport.tile != INVALID_TILE) {
02238     return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_AIRPORT);
02239   }
02240 
02241   for (AirportTileTableIterator iter(as->table[layout], tile); iter != INVALID_TILE; ++iter) {
02242     cost.AddCost(_price[PR_BUILD_STATION_AIRPORT]);
02243   }
02244 
02245   if (flags & DC_EXEC) {
02246     /* Always add the noise, so there will be no need to recalculate when option toggles */
02247     nearest->noise_reached += newnoise_level;
02248 
02249     st->AddFacility(FACIL_AIRPORT, tile);
02250     st->airport.type = airport_type;
02251     st->airport.layout = layout;
02252     st->airport.flags = 0;
02253     st->airport.rotation = rotation;
02254 
02255     st->rect.BeforeAddRect(tile, w, h, StationRect::ADD_TRY);
02256 
02257     for (AirportTileTableIterator iter(as->table[layout], tile); iter != INVALID_TILE; ++iter) {
02258       MakeAirport(iter, st->owner, st->index, iter.GetStationGfx(), WATER_CLASS_INVALID);
02259       SetStationTileRandomBits(iter, GB(Random(), 0, 4));
02260       st->airport.Add(iter);
02261 
02262       if (AirportTileSpec::Get(GetTranslatedAirportTileID(iter.GetStationGfx()))->animation.status != ANIM_STATUS_NO_ANIMATION) AddAnimatedTile(iter);
02263     }
02264 
02265     /* Only call the animation trigger after all tiles have been built */
02266     for (AirportTileTableIterator iter(as->table[layout], tile); iter != INVALID_TILE; ++iter) {
02267       AirportTileAnimationTrigger(st, iter, AAT_BUILT);
02268     }
02269 
02270     UpdateAirplanesOnNewStation(st);
02271 
02272     Company::Get(st->owner)->infrastructure.airport++;
02273     DirtyCompanyInfrastructureWindows(st->owner);
02274 
02275     st->UpdateVirtCoord();
02276     UpdateStationAcceptance(st, false);
02277     st->RecomputeIndustriesNear();
02278     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
02279     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
02280     InvalidateWindowData(WC_STATION_VIEW, st->index);
02281 
02282     if (_settings_game.economy.station_noise_level) {
02283       SetWindowDirty(WC_TOWN_VIEW, st->town->index);
02284     }
02285   }
02286 
02287   return cost;
02288 }
02289 
02296 static CommandCost RemoveAirport(TileIndex tile, DoCommandFlag flags)
02297 {
02298   Station *st = Station::GetByTile(tile);
02299 
02300   if (_current_company != OWNER_WATER) {
02301     CommandCost ret = CheckOwnership(st->owner);
02302     if (ret.Failed()) return ret;
02303   }
02304 
02305   tile = st->airport.tile;
02306 
02307   CommandCost cost(EXPENSES_CONSTRUCTION);
02308 
02309   const Aircraft *a;
02310   FOR_ALL_AIRCRAFT(a) {
02311     if (!a->IsNormalAircraft()) continue;
02312     if (a->targetairport == st->index && a->state != FLYING) return CMD_ERROR;
02313   }
02314 
02315   if (flags & DC_EXEC) {
02316     const AirportSpec *as = st->airport.GetSpec();
02317     /* The noise level is the noise from the airport and reduce it to account for the distance to the town center.
02318      * And as for construction, always remove it, even if the setting is not set, in order to avoid the
02319      * need of recalculation */
02320     AirportTileIterator it(st);
02321     Town *nearest = AirportGetNearestTown(as, it);
02322     nearest->noise_reached -= GetAirportNoiseLevelForTown(as, it, nearest->xy);
02323   }
02324 
02325   TILE_AREA_LOOP(tile_cur, st->airport) {
02326     if (!st->TileBelongsToAirport(tile_cur)) continue;
02327 
02328     CommandCost ret = EnsureNoVehicleOnGround(tile_cur);
02329     if (ret.Failed()) return ret;
02330 
02331     cost.AddCost(_price[PR_CLEAR_STATION_AIRPORT]);
02332 
02333     if (flags & DC_EXEC) {
02334       if (IsHangarTile(tile_cur)) OrderBackup::Reset(tile_cur, false);
02335       DeleteAnimatedTile(tile_cur);
02336       DoClearSquare(tile_cur);
02337       DeleteNewGRFInspectWindow(GSF_AIRPORTTILES, tile_cur);
02338     }
02339   }
02340 
02341   if (flags & DC_EXEC) {
02342     /* Clear the persistent storage. */
02343     delete st->airport.psa;
02344 
02345     for (uint i = 0; i < st->airport.GetNumHangars(); ++i) {
02346       DeleteWindowById(
02347         WC_VEHICLE_DEPOT, st->airport.GetHangarTile(i)
02348       );
02349     }
02350 
02351     st->rect.AfterRemoveRect(st, st->airport);
02352 
02353     st->airport.Clear();
02354     st->facilities &= ~FACIL_AIRPORT;
02355 
02356     InvalidateWindowData(WC_STATION_VIEW, st->index);
02357 
02358     if (_settings_game.economy.station_noise_level) {
02359       SetWindowDirty(WC_TOWN_VIEW, st->town->index);
02360     }
02361 
02362     Company::Get(st->owner)->infrastructure.airport--;
02363     DirtyCompanyInfrastructureWindows(st->owner);
02364 
02365     st->UpdateVirtCoord();
02366     st->RecomputeIndustriesNear();
02367     DeleteStationIfEmpty(st);
02368     DeleteNewGRFInspectWindow(GSF_AIRPORTS, st->index);
02369   }
02370 
02371   return cost;
02372 }
02373 
02383 CommandCost CmdOpenCloseAirport(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
02384 {
02385   if (!Station::IsValidID(p1)) return CMD_ERROR;
02386   Station *st = Station::Get(p1);
02387 
02388   if (!(st->facilities & FACIL_AIRPORT) || st->owner == OWNER_NONE) return CMD_ERROR;
02389 
02390   CommandCost ret = CheckOwnership(st->owner);
02391   if (ret.Failed()) return ret;
02392 
02393   if (flags & DC_EXEC) {
02394     st->airport.flags ^= AIRPORT_CLOSED_block;
02395     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_CLOSE_AIRPORT);
02396   }
02397   return CommandCost();
02398 }
02399 
02406 bool HasStationInUse(StationID station, bool include_company, CompanyID company)
02407 {
02408   const Vehicle *v;
02409   FOR_ALL_VEHICLES(v) {
02410     if ((v->owner == company) == include_company) {
02411       const Order *order;
02412       FOR_VEHICLE_ORDERS(v, order) {
02413         if ((order->IsType(OT_GOTO_STATION) || order->IsType(OT_GOTO_WAYPOINT)) && order->GetDestination() == station) {
02414           return true;
02415         }
02416       }
02417     }
02418   }
02419   return false;
02420 }
02421 
02422 static const TileIndexDiffC _dock_tileoffs_chkaround[] = {
02423   {-1,  0},
02424   { 0,  0},
02425   { 0,  0},
02426   { 0, -1}
02427 };
02428 static const byte _dock_w_chk[4] = { 2, 1, 2, 1 };
02429 static const byte _dock_h_chk[4] = { 1, 2, 1, 2 };
02430 
02440 CommandCost CmdBuildDock(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
02441 {
02442   StationID station_to_join = GB(p2, 16, 16);
02443   bool reuse = (station_to_join != NEW_STATION);
02444   if (!reuse) station_to_join = INVALID_STATION;
02445   bool distant_join = (station_to_join != INVALID_STATION);
02446 
02447   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
02448 
02449   DiagDirection direction = GetInclinedSlopeDirection(GetTileSlope(tile));
02450   if (direction == INVALID_DIAGDIR) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02451   direction = ReverseDiagDir(direction);
02452 
02453   /* Docks cannot be placed on rapids */
02454   if (HasTileWaterGround(tile)) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02455 
02456   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile, flags);
02457   if (ret.Failed()) return ret;
02458 
02459   if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
02460 
02461   ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
02462   if (ret.Failed()) return ret;
02463 
02464   TileIndex tile_cur = tile + TileOffsByDiagDir(direction);
02465 
02466   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur) != SLOPE_FLAT) {
02467     return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02468   }
02469 
02470   if (MayHaveBridgeAbove(tile_cur) && IsBridgeAbove(tile_cur)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
02471 
02472   /* Get the water class of the water tile before it is cleared.*/
02473   WaterClass wc = GetWaterClass(tile_cur);
02474 
02475   ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
02476   if (ret.Failed()) return ret;
02477 
02478   tile_cur += TileOffsByDiagDir(direction);
02479   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur) != SLOPE_FLAT) {
02480     return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02481   }
02482 
02483   TileArea dock_area = TileArea(tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
02484       _dock_w_chk[direction], _dock_h_chk[direction]);
02485 
02486   /* middle */
02487   Station *st = NULL;
02488   ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p1, 0), dock_area, &st);
02489   if (ret.Failed()) return ret;
02490 
02491   /* Distant join */
02492   if (st == NULL && distant_join) st = Station::GetIfValid(station_to_join);
02493 
02494   ret = BuildStationPart(&st, flags, reuse, dock_area, STATIONNAMING_DOCK);
02495   if (ret.Failed()) return ret;
02496 
02497   if (st != NULL && st->dock_tile != INVALID_TILE) return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_DOCK);
02498 
02499   if (flags & DC_EXEC) {
02500     st->dock_tile = tile;
02501     st->AddFacility(FACIL_DOCK, tile);
02502 
02503     st->rect.BeforeAddRect(dock_area.tile, dock_area.w, dock_area.h, StationRect::ADD_TRY);
02504 
02505     /* If the water part of the dock is on a canal, update infrastructure counts.
02506      * This is needed as we've unconditionally cleared that tile before. */
02507     if (wc == WATER_CLASS_CANAL) {
02508       Company::Get(st->owner)->infrastructure.water++;
02509     }
02510     Company::Get(st->owner)->infrastructure.station += 2;
02511     DirtyCompanyInfrastructureWindows(st->owner);
02512 
02513     MakeDock(tile, st->owner, st->index, direction, wc);
02514 
02515     st->UpdateVirtCoord();
02516     UpdateStationAcceptance(st, false);
02517     st->RecomputeIndustriesNear();
02518     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
02519     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
02520     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_SHIPS);
02521   }
02522 
02523   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_STATION_DOCK]);
02524 }
02525 
02532 static CommandCost RemoveDock(TileIndex tile, DoCommandFlag flags)
02533 {
02534   Station *st = Station::GetByTile(tile);
02535   CommandCost ret = CheckOwnership(st->owner);
02536   if (ret.Failed()) return ret;
02537 
02538   TileIndex docking_location = TILE_ADD(st->dock_tile, ToTileIndexDiff(GetDockOffset(st->dock_tile)));
02539 
02540   TileIndex tile1 = st->dock_tile;
02541   TileIndex tile2 = tile1 + TileOffsByDiagDir(GetDockDirection(tile1));
02542 
02543   ret = EnsureNoVehicleOnGround(tile1);
02544   if (ret.Succeeded()) ret = EnsureNoVehicleOnGround(tile2);
02545   if (ret.Failed()) return ret;
02546 
02547   if (flags & DC_EXEC) {
02548     DoClearSquare(tile1);
02549     MarkTileDirtyByTile(tile1);
02550     MakeWaterKeepingClass(tile2, st->owner);
02551 
02552     st->rect.AfterRemoveTile(st, tile1);
02553     st->rect.AfterRemoveTile(st, tile2);
02554 
02555     st->dock_tile = INVALID_TILE;
02556     st->facilities &= ~FACIL_DOCK;
02557 
02558     Company::Get(st->owner)->infrastructure.station -= 2;
02559     DirtyCompanyInfrastructureWindows(st->owner);
02560 
02561     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_SHIPS);
02562     st->UpdateVirtCoord();
02563     st->RecomputeIndustriesNear();
02564     DeleteStationIfEmpty(st);
02565 
02566     /* All ships that were going to our station, can't go to it anymore.
02567      * Just clear the order, then automatically the next appropriate order
02568      * will be selected and in case of no appropriate order it will just
02569      * wander around the world. */
02570     Ship *s;
02571     FOR_ALL_SHIPS(s) {
02572       if (s->current_order.IsType(OT_LOADING) && s->tile == docking_location) {
02573         s->LeaveStation();
02574       }
02575 
02576       if (s->dest_tile == docking_location) {
02577         s->dest_tile = 0;
02578         s->current_order.Free();
02579       }
02580     }
02581   }
02582 
02583   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_STATION_DOCK]);
02584 }
02585 
02586 #include "table/station_land.h"
02587 
02588 const DrawTileSprites *GetStationTileLayout(StationType st, byte gfx)
02589 {
02590   return &_station_display_datas[st][gfx];
02591 }
02592 
02602 bool SplitGroundSpriteForOverlay(const TileInfo *ti, SpriteID *ground, RailTrackOffset *overlay_offset)
02603 {
02604   bool snow_desert;
02605   switch (*ground) {
02606     case SPR_RAIL_TRACK_X:
02607       snow_desert = false;
02608       *overlay_offset = RTO_X;
02609       break;
02610 
02611     case SPR_RAIL_TRACK_Y:
02612       snow_desert = false;
02613       *overlay_offset = RTO_Y;
02614       break;
02615 
02616     case SPR_RAIL_TRACK_X_SNOW:
02617       snow_desert = true;
02618       *overlay_offset = RTO_X;
02619       break;
02620 
02621     case SPR_RAIL_TRACK_Y_SNOW:
02622       snow_desert = true;
02623       *overlay_offset = RTO_Y;
02624       break;
02625 
02626     default:
02627       return false;
02628   }
02629 
02630   if (ti != NULL) {
02631     /* Decide snow/desert from tile */
02632     switch (_settings_game.game_creation.landscape) {
02633       case LT_ARCTIC:
02634         snow_desert = (uint)ti->z > GetSnowLine() * TILE_HEIGHT;
02635         break;
02636 
02637       case LT_TROPIC:
02638         snow_desert = GetTropicZone(ti->tile) == TROPICZONE_DESERT;
02639         break;
02640 
02641       default:
02642         break;
02643     }
02644   }
02645 
02646   *ground = snow_desert ? SPR_FLAT_SNOW_DESERT_TILE : SPR_FLAT_GRASS_TILE;
02647   return true;
02648 }
02649 
02650 static void DrawTile_Station(TileInfo *ti)
02651 {
02652   const NewGRFSpriteLayout *layout = NULL;
02653   DrawTileSprites tmp_rail_layout;
02654   const DrawTileSprites *t = NULL;
02655   RoadTypes roadtypes;
02656   int32 total_offset;
02657   const RailtypeInfo *rti = NULL;
02658   uint32 relocation = 0;
02659   uint32 ground_relocation = 0;
02660   BaseStation *st = NULL;
02661   const StationSpec *statspec = NULL;
02662   uint tile_layout = 0;
02663 
02664   if (HasStationRail(ti->tile)) {
02665     rti = GetRailTypeInfo(GetRailType(ti->tile));
02666     roadtypes = ROADTYPES_NONE;
02667     total_offset = rti->GetRailtypeSpriteOffset();
02668 
02669     if (IsCustomStationSpecIndex(ti->tile)) {
02670       /* look for customization */
02671       st = BaseStation::GetByTile(ti->tile);
02672       statspec = st->speclist[GetCustomStationSpecIndex(ti->tile)].spec;
02673 
02674       if (statspec != NULL) {
02675         tile_layout = GetStationGfx(ti->tile);
02676 
02677         if (HasBit(statspec->callback_mask, CBM_STATION_SPRITE_LAYOUT)) {
02678           uint16 callback = GetStationCallback(CBID_STATION_SPRITE_LAYOUT, 0, 0, statspec, st, ti->tile);
02679           if (callback != CALLBACK_FAILED) tile_layout = (callback & ~1) + GetRailStationAxis(ti->tile);
02680         }
02681 
02682         /* Ensure the chosen tile layout is valid for this custom station */
02683         if (statspec->renderdata != NULL) {
02684           layout = &statspec->renderdata[tile_layout < statspec->tiles ? tile_layout : (uint)GetRailStationAxis(ti->tile)];
02685           if (!layout->NeedsPreprocessing()) {
02686             t = layout;
02687             layout = NULL;
02688           }
02689         }
02690       }
02691     }
02692   } else {
02693     roadtypes = IsRoadStop(ti->tile) ? GetRoadTypes(ti->tile) : ROADTYPES_NONE;
02694     total_offset = 0;
02695   }
02696 
02697   StationGfx gfx = GetStationGfx(ti->tile);
02698   if (IsAirport(ti->tile)) {
02699     gfx = GetAirportGfx(ti->tile);
02700     if (gfx >= NEW_AIRPORTTILE_OFFSET) {
02701       const AirportTileSpec *ats = AirportTileSpec::Get(gfx);
02702       if (ats->grf_prop.spritegroup[0] != NULL && DrawNewAirportTile(ti, Station::GetByTile(ti->tile), gfx, ats)) {
02703         return;
02704       }
02705       /* No sprite group (or no valid one) found, meaning no graphics associated.
02706        * Use the substitute one instead */
02707       assert(ats->grf_prop.subst_id != INVALID_AIRPORTTILE);
02708       gfx = ats->grf_prop.subst_id;
02709     }
02710     switch (gfx) {
02711       case APT_RADAR_GRASS_FENCE_SW:
02712         t = &_station_display_datas_airport_radar_grass_fence_sw[GetAnimationFrame(ti->tile)];
02713         break;
02714       case APT_GRASS_FENCE_NE_FLAG:
02715         t = &_station_display_datas_airport_flag_grass_fence_ne[GetAnimationFrame(ti->tile)];
02716         break;
02717       case APT_RADAR_FENCE_SW:
02718         t = &_station_display_datas_airport_radar_fence_sw[GetAnimationFrame(ti->tile)];
02719         break;
02720       case APT_RADAR_FENCE_NE:
02721         t = &_station_display_datas_airport_radar_fence_ne[GetAnimationFrame(ti->tile)];
02722         break;
02723       case APT_GRASS_FENCE_NE_FLAG_2:
02724         t = &_station_display_datas_airport_flag_grass_fence_ne_2[GetAnimationFrame(ti->tile)];
02725         break;
02726     }
02727   }
02728 
02729   Owner owner = GetTileOwner(ti->tile);
02730 
02731   PaletteID palette;
02732   if (Company::IsValidID(owner)) {
02733     palette = COMPANY_SPRITE_COLOUR(owner);
02734   } else {
02735     /* Some stations are not owner by a company, namely oil rigs */
02736     palette = PALETTE_TO_GREY;
02737   }
02738 
02739   if (layout == NULL && (t == NULL || t->seq == NULL)) t = GetStationTileLayout(GetStationType(ti->tile), gfx);
02740 
02741   /* don't show foundation for docks */
02742   if (ti->tileh != SLOPE_FLAT && !IsDock(ti->tile)) {
02743     if (statspec != NULL && HasBit(statspec->flags, SSF_CUSTOM_FOUNDATIONS)) {
02744       /* Station has custom foundations.
02745        * Check whether the foundation continues beyond the tile's upper sides. */
02746       uint edge_info = 0;
02747       int z;
02748       Slope slope = GetFoundationPixelSlope(ti->tile, &z);
02749       if (!HasFoundationNW(ti->tile, slope, z)) SetBit(edge_info, 0);
02750       if (!HasFoundationNE(ti->tile, slope, z)) SetBit(edge_info, 1);
02751       SpriteID image = GetCustomStationFoundationRelocation(statspec, st, ti->tile, tile_layout, edge_info);
02752       if (image == 0) goto draw_default_foundation;
02753 
02754       if (HasBit(statspec->flags, SSF_EXTENDED_FOUNDATIONS)) {
02755         /* Station provides extended foundations. */
02756 
02757         static const uint8 foundation_parts[] = {
02758           0, 0, 0, 0, // Invalid,  Invalid,   Invalid,   SLOPE_SW
02759           0, 1, 2, 3, // Invalid,  SLOPE_EW,  SLOPE_SE,  SLOPE_WSE
02760           0, 4, 5, 6, // Invalid,  SLOPE_NW,  SLOPE_NS,  SLOPE_NWS
02761           7, 8, 9     // SLOPE_NE, SLOPE_ENW, SLOPE_SEN
02762         };
02763 
02764         AddSortableSpriteToDraw(image + foundation_parts[ti->tileh], PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
02765       } else {
02766         /* Draw simple foundations, built up from 8 possible foundation sprites. */
02767 
02768         /* Each set bit represents one of the eight composite sprites to be drawn.
02769          * 'Invalid' entries will not drawn but are included for completeness. */
02770         static const uint8 composite_foundation_parts[] = {
02771           /* Invalid  (00000000), Invalid   (11010001), Invalid   (11100100), SLOPE_SW  (11100000) */
02772              0x00,                0xD1,                 0xE4,                 0xE0,
02773           /* Invalid  (11001010), SLOPE_EW  (11001001), SLOPE_SE  (11000100), SLOPE_WSE (11000000) */
02774              0xCA,                0xC9,                 0xC4,                 0xC0,
02775           /* Invalid  (11010010), SLOPE_NW  (10010001), SLOPE_NS  (11100100), SLOPE_NWS (10100000) */
02776              0xD2,                0x91,                 0xE4,                 0xA0,
02777           /* SLOPE_NE (01001010), SLOPE_ENW (00001001), SLOPE_SEN (01000100) */
02778              0x4A,                0x09,                 0x44
02779         };
02780 
02781         uint8 parts = composite_foundation_parts[ti->tileh];
02782 
02783         /* If foundations continue beyond the tile's upper sides then
02784          * mask out the last two pieces. */
02785         if (HasBit(edge_info, 0)) ClrBit(parts, 6);
02786         if (HasBit(edge_info, 1)) ClrBit(parts, 7);
02787 
02788         if (parts == 0) {
02789           /* We always have to draw at least one sprite to make sure there is a boundingbox and a sprite with the
02790            * correct offset for the childsprites.
02791            * So, draw the (completely empty) sprite of the default foundations. */
02792           goto draw_default_foundation;
02793         }
02794 
02795         StartSpriteCombine();
02796         for (int i = 0; i < 8; i++) {
02797           if (HasBit(parts, i)) {
02798             AddSortableSpriteToDraw(image + i, PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
02799           }
02800         }
02801         EndSpriteCombine();
02802       }
02803 
02804       OffsetGroundSprite(31, 1);
02805       ti->z += ApplyPixelFoundationToSlope(FOUNDATION_LEVELED, &ti->tileh);
02806     } else {
02807 draw_default_foundation:
02808       DrawFoundation(ti, FOUNDATION_LEVELED);
02809     }
02810   }
02811 
02812   if (IsBuoy(ti->tile)) {
02813     DrawWaterClassGround(ti);
02814     SpriteID sprite = GetCanalSprite(CF_BUOY, ti->tile);
02815     if (sprite != 0) total_offset = sprite - SPR_IMG_BUOY;
02816   } else if (IsDock(ti->tile) || (IsOilRig(ti->tile) && IsTileOnWater(ti->tile))) {
02817     if (ti->tileh == SLOPE_FLAT) {
02818       DrawWaterClassGround(ti);
02819     } else {
02820       assert(IsDock(ti->tile));
02821       TileIndex water_tile = ti->tile + TileOffsByDiagDir(GetDockDirection(ti->tile));
02822       WaterClass wc = GetWaterClass(water_tile);
02823       if (wc == WATER_CLASS_SEA) {
02824         DrawShoreTile(ti->tileh);
02825       } else {
02826         DrawClearLandTile(ti, 3);
02827       }
02828     }
02829   } else {
02830     if (layout != NULL) {
02831       /* Sprite layout which needs preprocessing */
02832       bool separate_ground = HasBit(statspec->flags, SSF_SEPARATE_GROUND);
02833       uint32 var10_values = layout->PrepareLayout(total_offset, rti->fallback_railtype, 0, 0, separate_ground);
02834       uint8 var10;
02835       FOR_EACH_SET_BIT(var10, var10_values) {
02836         uint32 var10_relocation = GetCustomStationRelocation(statspec, st, ti->tile, var10);
02837         layout->ProcessRegisters(var10, var10_relocation, separate_ground);
02838       }
02839       tmp_rail_layout.seq = layout->GetLayout(&tmp_rail_layout.ground);
02840       t = &tmp_rail_layout;
02841       total_offset = 0;
02842     } else if (statspec != NULL) {
02843       /* Simple sprite layout */
02844       ground_relocation = relocation = GetCustomStationRelocation(statspec, st, ti->tile, 0);
02845       if (HasBit(statspec->flags, SSF_SEPARATE_GROUND)) {
02846         ground_relocation = GetCustomStationRelocation(statspec, st, ti->tile, 1);
02847       }
02848       ground_relocation += rti->fallback_railtype;
02849     }
02850 
02851     SpriteID image = t->ground.sprite;
02852     PaletteID pal  = t->ground.pal;
02853     RailTrackOffset overlay_offset;
02854     if (rti != NULL && rti->UsesOverlay() && SplitGroundSpriteForOverlay(ti, &image, &overlay_offset)) {
02855       SpriteID ground = GetCustomRailSprite(rti, ti->tile, RTSG_GROUND);
02856       DrawGroundSprite(image, PAL_NONE);
02857       DrawGroundSprite(ground + overlay_offset, PAL_NONE);
02858 
02859       if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasStationReservation(ti->tile)) {
02860         SpriteID overlay = GetCustomRailSprite(rti, ti->tile, RTSG_OVERLAY);
02861         DrawGroundSprite(overlay + overlay_offset, PALETTE_CRASH);
02862       }
02863     } else {
02864       image += HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE) ? ground_relocation : total_offset;
02865       if (HasBit(pal, SPRITE_MODIFIER_CUSTOM_SPRITE)) pal += ground_relocation;
02866       DrawGroundSprite(image, GroundSpritePaletteTransform(image, pal, palette));
02867 
02868       /* PBS debugging, draw reserved tracks darker */
02869       if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasStationRail(ti->tile) && HasStationReservation(ti->tile)) {
02870         const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
02871         DrawGroundSprite(GetRailStationAxis(ti->tile) == AXIS_X ? rti->base_sprites.single_x : rti->base_sprites.single_y, PALETTE_CRASH);
02872       }
02873     }
02874   }
02875 
02876   if (HasStationRail(ti->tile) && HasCatenaryDrawn(GetRailType(ti->tile))) DrawCatenary(ti);
02877 
02878   if (HasBit(roadtypes, ROADTYPE_TRAM)) {
02879     Axis axis = GetRoadStopDir(ti->tile) == DIAGDIR_NE ? AXIS_X : AXIS_Y;
02880     DrawGroundSprite((HasBit(roadtypes, ROADTYPE_ROAD) ? SPR_TRAMWAY_OVERLAY : SPR_TRAMWAY_TRAM) + (axis ^ 1), PAL_NONE);
02881     DrawTramCatenary(ti, axis == AXIS_X ? ROAD_X : ROAD_Y);
02882   }
02883 
02884   if (IsRailWaypoint(ti->tile)) {
02885     /* Don't offset the waypoint graphics; they're always the same. */
02886     total_offset = 0;
02887   }
02888 
02889   DrawRailTileSeq(ti, t, TO_BUILDINGS, total_offset, relocation, palette);
02890 }
02891 
02892 void StationPickerDrawSprite(int x, int y, StationType st, RailType railtype, RoadType roadtype, int image)
02893 {
02894   int32 total_offset = 0;
02895   PaletteID pal = COMPANY_SPRITE_COLOUR(_local_company);
02896   const DrawTileSprites *t = GetStationTileLayout(st, image);
02897   const RailtypeInfo *rti = NULL;
02898 
02899   if (railtype != INVALID_RAILTYPE) {
02900     rti = GetRailTypeInfo(railtype);
02901     total_offset = rti->GetRailtypeSpriteOffset();
02902   }
02903 
02904   SpriteID img = t->ground.sprite;
02905   RailTrackOffset overlay_offset;
02906   if (rti != NULL && rti->UsesOverlay() && SplitGroundSpriteForOverlay(NULL, &img, &overlay_offset)) {
02907     SpriteID ground = GetCustomRailSprite(rti, INVALID_TILE, RTSG_GROUND);
02908     DrawSprite(img, PAL_NONE, x, y);
02909     DrawSprite(ground + overlay_offset, PAL_NONE, x, y);
02910   } else {
02911     DrawSprite(img + total_offset, HasBit(img, PALETTE_MODIFIER_COLOUR) ? pal : PAL_NONE, x, y);
02912   }
02913 
02914   if (roadtype == ROADTYPE_TRAM) {
02915     DrawSprite(SPR_TRAMWAY_TRAM + (t->ground.sprite == SPR_ROAD_PAVED_STRAIGHT_X ? 1 : 0), PAL_NONE, x, y);
02916   }
02917 
02918   /* Default waypoint has no railtype specific sprites */
02919   DrawRailTileSeqInGUI(x, y, t, st == STATION_WAYPOINT ? 0 : total_offset, 0, pal);
02920 }
02921 
02922 static int GetSlopePixelZ_Station(TileIndex tile, uint x, uint y)
02923 {
02924   return GetTileMaxPixelZ(tile);
02925 }
02926 
02927 static Foundation GetFoundation_Station(TileIndex tile, Slope tileh)
02928 {
02929   return FlatteningFoundation(tileh);
02930 }
02931 
02932 static void GetTileDesc_Station(TileIndex tile, TileDesc *td)
02933 {
02934   td->owner[0] = GetTileOwner(tile);
02935   if (IsDriveThroughStopTile(tile)) {
02936     Owner road_owner = INVALID_OWNER;
02937     Owner tram_owner = INVALID_OWNER;
02938     RoadTypes rts = GetRoadTypes(tile);
02939     if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
02940     if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
02941 
02942     /* Is there a mix of owners? */
02943     if ((tram_owner != INVALID_OWNER && tram_owner != td->owner[0]) ||
02944         (road_owner != INVALID_OWNER && road_owner != td->owner[0])) {
02945       uint i = 1;
02946       if (road_owner != INVALID_OWNER) {
02947         td->owner_type[i] = STR_LAND_AREA_INFORMATION_ROAD_OWNER;
02948         td->owner[i] = road_owner;
02949         i++;
02950       }
02951       if (tram_owner != INVALID_OWNER) {
02952         td->owner_type[i] = STR_LAND_AREA_INFORMATION_TRAM_OWNER;
02953         td->owner[i] = tram_owner;
02954       }
02955     }
02956   }
02957   td->build_date = BaseStation::GetByTile(tile)->build_date;
02958 
02959   if (HasStationTileRail(tile)) {
02960     const StationSpec *spec = GetStationSpec(tile);
02961 
02962     if (spec != NULL) {
02963       td->station_class = StationClass::Get(spec->cls_id)->name;
02964       td->station_name  = spec->name;
02965 
02966       if (spec->grf_prop.grffile != NULL) {
02967         const GRFConfig *gc = GetGRFConfig(spec->grf_prop.grffile->grfid);
02968         td->grf = gc->GetName();
02969       }
02970     }
02971 
02972     const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(tile));
02973     td->rail_speed = rti->max_speed;
02974   }
02975 
02976   if (IsAirport(tile)) {
02977     const AirportSpec *as = Station::GetByTile(tile)->airport.GetSpec();
02978     td->airport_class = AirportClass::Get(as->cls_id)->name;
02979     td->airport_name = as->name;
02980 
02981     const AirportTileSpec *ats = AirportTileSpec::GetByTile(tile);
02982     td->airport_tile_name = ats->name;
02983 
02984     if (as->grf_prop.grffile != NULL) {
02985       const GRFConfig *gc = GetGRFConfig(as->grf_prop.grffile->grfid);
02986       td->grf = gc->GetName();
02987     } else if (ats->grf_prop.grffile != NULL) {
02988       const GRFConfig *gc = GetGRFConfig(ats->grf_prop.grffile->grfid);
02989       td->grf = gc->GetName();
02990     }
02991   }
02992 
02993   StringID str;
02994   switch (GetStationType(tile)) {
02995     default: NOT_REACHED();
02996     case STATION_RAIL:     str = STR_LAI_STATION_DESCRIPTION_RAILROAD_STATION; break;
02997     case STATION_AIRPORT:
02998       str = (IsHangar(tile) ? STR_LAI_STATION_DESCRIPTION_AIRCRAFT_HANGAR : STR_LAI_STATION_DESCRIPTION_AIRPORT);
02999       break;
03000     case STATION_TRUCK:    str = STR_LAI_STATION_DESCRIPTION_TRUCK_LOADING_AREA; break;
03001     case STATION_BUS:      str = STR_LAI_STATION_DESCRIPTION_BUS_STATION; break;
03002     case STATION_OILRIG:   str = STR_INDUSTRY_NAME_OIL_RIG; break;
03003     case STATION_DOCK:     str = STR_LAI_STATION_DESCRIPTION_SHIP_DOCK; break;
03004     case STATION_BUOY:     str = STR_LAI_STATION_DESCRIPTION_BUOY; break;
03005     case STATION_WAYPOINT: str = STR_LAI_STATION_DESCRIPTION_WAYPOINT; break;
03006   }
03007   td->str = str;
03008 }
03009 
03010 
03011 static TrackStatus GetTileTrackStatus_Station(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
03012 {
03013   TrackBits trackbits = TRACK_BIT_NONE;
03014 
03015   switch (mode) {
03016     case TRANSPORT_RAIL:
03017       if (HasStationRail(tile) && !IsStationTileBlocked(tile)) {
03018         trackbits = TrackToTrackBits(GetRailStationTrack(tile));
03019       }
03020       break;
03021 
03022     case TRANSPORT_WATER:
03023       /* buoy is coded as a station, it is always on open water */
03024       if (IsBuoy(tile)) {
03025         trackbits = TRACK_BIT_ALL;
03026         /* remove tracks that connect NE map edge */
03027         if (TileX(tile) == 0) trackbits &= ~(TRACK_BIT_X | TRACK_BIT_UPPER | TRACK_BIT_RIGHT);
03028         /* remove tracks that connect NW map edge */
03029         if (TileY(tile) == 0) trackbits &= ~(TRACK_BIT_Y | TRACK_BIT_LEFT | TRACK_BIT_UPPER);
03030       }
03031       break;
03032 
03033     case TRANSPORT_ROAD:
03034       if ((GetRoadTypes(tile) & sub_mode) != 0 && IsRoadStop(tile)) {
03035         DiagDirection dir = GetRoadStopDir(tile);
03036         Axis axis = DiagDirToAxis(dir);
03037 
03038         if (side != INVALID_DIAGDIR) {
03039           if (axis != DiagDirToAxis(side) || (IsStandardRoadStopTile(tile) && dir != side)) break;
03040         }
03041 
03042         trackbits = AxisToTrackBits(axis);
03043       }
03044       break;
03045 
03046     default:
03047       break;
03048   }
03049 
03050   return CombineTrackStatus(TrackBitsToTrackdirBits(trackbits), TRACKDIR_BIT_NONE);
03051 }
03052 
03053 
03054 static void TileLoop_Station(TileIndex tile)
03055 {
03056   /* FIXME -- GetTileTrackStatus_Station -> animated stationtiles
03057    * hardcoded.....not good */
03058   switch (GetStationType(tile)) {
03059     case STATION_AIRPORT:
03060       AirportTileAnimationTrigger(Station::GetByTile(tile), tile, AAT_TILELOOP);
03061       break;
03062 
03063     case STATION_DOCK:
03064       if (GetTileSlope(tile) != SLOPE_FLAT) break; // only handle water part
03065       /* FALL THROUGH */
03066     case STATION_OILRIG: //(station part)
03067     case STATION_BUOY:
03068       TileLoop_Water(tile);
03069       break;
03070 
03071     default: break;
03072   }
03073 }
03074 
03075 
03076 static void AnimateTile_Station(TileIndex tile)
03077 {
03078   if (HasStationRail(tile)) {
03079     AnimateStationTile(tile);
03080     return;
03081   }
03082 
03083   if (IsAirport(tile)) {
03084     AnimateAirportTile(tile);
03085   }
03086 }
03087 
03088 
03089 static bool ClickTile_Station(TileIndex tile)
03090 {
03091   const BaseStation *bst = BaseStation::GetByTile(tile);
03092 
03093   if (bst->facilities & FACIL_WAYPOINT) {
03094     ShowWaypointWindow(Waypoint::From(bst));
03095   } else if (IsHangar(tile)) {
03096     const Station *st = Station::From(bst);
03097     ShowDepotWindow(st->airport.GetHangarTile(st->airport.GetHangarNum(tile)), VEH_AIRCRAFT);
03098   } else {
03099     ShowStationViewWindow(bst->index);
03100   }
03101   return true;
03102 }
03103 
03104 static VehicleEnterTileStatus VehicleEnter_Station(Vehicle *v, TileIndex tile, int x, int y)
03105 {
03106   if (v->type == VEH_TRAIN) {
03107     StationID station_id = GetStationIndex(tile);
03108     if (!v->current_order.ShouldStopAtStation(v, station_id)) return VETSB_CONTINUE;
03109     if (!IsRailStation(tile) || !v->IsFrontEngine()) return VETSB_CONTINUE;
03110 
03111     int station_ahead;
03112     int station_length;
03113     int stop = GetTrainStopLocation(station_id, tile, Train::From(v), &station_ahead, &station_length);
03114 
03115     /* Stop whenever that amount of station ahead + the distance from the
03116      * begin of the platform to the stop location is longer than the length
03117      * of the platform. Station ahead 'includes' the current tile where the
03118      * vehicle is on, so we need to subtract that. */
03119     if (!IsInsideBS(stop + station_ahead, station_length, TILE_SIZE)) return VETSB_CONTINUE;
03120 
03121     DiagDirection dir = DirToDiagDir(v->direction);
03122 
03123     x &= 0xF;
03124     y &= 0xF;
03125 
03126     if (DiagDirToAxis(dir) != AXIS_X) Swap(x, y);
03127     if (y == TILE_SIZE / 2) {
03128       if (dir != DIAGDIR_SE && dir != DIAGDIR_SW) x = TILE_SIZE - 1 - x;
03129       stop &= TILE_SIZE - 1;
03130 
03131       if (x == stop) return VETSB_ENTERED_STATION | (VehicleEnterTileStatus)(station_id << VETS_STATION_ID_OFFSET); // enter station
03132       if (x < stop) {
03133         uint16 spd;
03134 
03135         v->vehstatus |= VS_TRAIN_SLOWING;
03136         spd = max(0, (stop - x) * 20 - 15);
03137         if (spd < v->cur_speed) v->cur_speed = spd;
03138       }
03139     }
03140   } else if (v->type == VEH_ROAD) {
03141     RoadVehicle *rv = RoadVehicle::From(v);
03142     if (rv->state < RVSB_IN_ROAD_STOP && !IsReversingRoadTrackdir((Trackdir)rv->state) && rv->frame == 0) {
03143       if (IsRoadStop(tile) && rv->IsFrontEngine()) {
03144         /* Attempt to allocate a parking bay in a road stop */
03145         return RoadStop::GetByTile(tile, GetRoadStopType(tile))->Enter(rv) ? VETSB_CONTINUE : VETSB_CANNOT_ENTER;
03146       }
03147     }
03148   }
03149 
03150   return VETSB_CONTINUE;
03151 }
03152 
03157 void TriggerWatchedCargoCallbacks(Station *st)
03158 {
03159   /* Collect cargoes accepted since the last big tick. */
03160   uint cargoes = 0;
03161   for (CargoID cid = 0; cid < NUM_CARGO; cid++) {
03162     if (HasBit(st->goods[cid].acceptance_pickup, GoodsEntry::GES_ACCEPTED_BIGTICK)) SetBit(cargoes, cid);
03163   }
03164 
03165   /* Anything to do? */
03166   if (cargoes == 0) return;
03167 
03168   /* Loop over all houses in the catchment. */
03169   Rect r = st->GetCatchmentRect();
03170   TileArea ta(TileXY(r.left, r.top), TileXY(r.right, r.bottom));
03171   TILE_AREA_LOOP(tile, ta) {
03172     if (IsTileType(tile, MP_HOUSE)) {
03173       WatchedCargoCallback(tile, cargoes);
03174     }
03175   }
03176 }
03177 
03184 static bool StationHandleBigTick(BaseStation *st)
03185 {
03186   if (!st->IsInUse()) {
03187     if (++st->delete_ctr >= 8) delete st;
03188     return false;
03189   }
03190 
03191   if (Station::IsExpected(st)) {
03192     TriggerWatchedCargoCallbacks(Station::From(st));
03193 
03194     for (CargoID i = 0; i < NUM_CARGO; i++) {
03195       ClrBit(Station::From(st)->goods[i].acceptance_pickup, GoodsEntry::GES_ACCEPTED_BIGTICK);
03196     }
03197   }
03198 
03199 
03200   if ((st->facilities & FACIL_WAYPOINT) == 0) UpdateStationAcceptance(Station::From(st), true);
03201 
03202   return true;
03203 }
03204 
03205 static inline void byte_inc_sat(byte *p)
03206 {
03207   byte b = *p + 1;
03208   if (b != 0) *p = b;
03209 }
03210 
03211 static void UpdateStationRating(Station *st)
03212 {
03213   bool waiting_changed = false;
03214 
03215   byte_inc_sat(&st->time_since_load);
03216   byte_inc_sat(&st->time_since_unload);
03217 
03218   const CargoSpec *cs;
03219   FOR_ALL_CARGOSPECS(cs) {
03220     GoodsEntry *ge = &st->goods[cs->Index()];
03221     /* Slowly increase the rating back to his original level in the case we
03222      *  didn't deliver cargo yet to this station. This happens when a bribe
03223      *  failed while you didn't moved that cargo yet to a station. */
03224     if (!HasBit(ge->acceptance_pickup, GoodsEntry::GES_PICKUP) && ge->rating < INITIAL_STATION_RATING) {
03225       ge->rating++;
03226     }
03227 
03228     /* Only change the rating if we are moving this cargo */
03229     if (HasBit(ge->acceptance_pickup, GoodsEntry::GES_PICKUP)) {
03230       byte_inc_sat(&ge->time_since_pickup);
03231 
03232       bool skip = false;
03233       int rating = 0;
03234       uint waiting = ge->cargo.Count();
03235 
03236       if (HasBit(cs->callback_mask, CBM_CARGO_STATION_RATING_CALC)) {
03237         /* Perform custom station rating. If it succeeds the speed, days in transit and
03238          * waiting cargo ratings must not be executed. */
03239 
03240         /* NewGRFs expect last speed to be 0xFF when no vehicle has arrived yet. */
03241         uint last_speed = ge->HasVehicleEverTriedLoading() ? ge->last_speed : 0xFF;
03242 
03243         uint32 var18 = min(ge->time_since_pickup, 0xFF) | (min(waiting, 0xFFFF) << 8) | (min(last_speed, 0xFF) << 24);
03244         /* Convert to the 'old' vehicle types */
03245         uint32 var10 = (st->last_vehicle_type == VEH_INVALID) ? 0x0 : (st->last_vehicle_type + 0x10);
03246         uint16 callback = GetCargoCallback(CBID_CARGO_STATION_RATING_CALC, var10, var18, cs);
03247         if (callback != CALLBACK_FAILED) {
03248           skip = true;
03249           rating = GB(callback, 0, 14);
03250 
03251           /* Simulate a 15 bit signed value */
03252           if (HasBit(callback, 14)) rating -= 0x4000;
03253         }
03254       }
03255 
03256       if (!skip) {
03257         int b = ge->last_speed - 85;
03258         if (b >= 0) rating += b >> 2;
03259 
03260         byte waittime = ge->time_since_pickup;
03261         if (st->last_vehicle_type == VEH_SHIP) waittime >>= 2;
03262         (waittime > 21) ||
03263         (rating += 25, waittime > 12) ||
03264         (rating += 25, waittime > 6) ||
03265         (rating += 45, waittime > 3) ||
03266         (rating += 35, true);
03267 
03268         (rating -= 90, waiting > 1500) ||
03269         (rating += 55, waiting > 1000) ||
03270         (rating += 35, waiting > 600) ||
03271         (rating += 10, waiting > 300) ||
03272         (rating += 20, waiting > 100) ||
03273         (rating += 10, true);
03274       }
03275 
03276       if (Company::IsValidID(st->owner) && HasBit(st->town->statues, st->owner)) rating += 26;
03277 
03278       byte age = ge->last_age;
03279       (age >= 3) ||
03280       (rating += 10, age >= 2) ||
03281       (rating += 10, age >= 1) ||
03282       (rating += 13, true);
03283 
03284       {
03285         int or_ = ge->rating; // old rating
03286 
03287         /* only modify rating in steps of -2, -1, 0, 1 or 2 */
03288         ge->rating = rating = or_ + Clamp(Clamp(rating, 0, 255) - or_, -2, 2);
03289 
03290         /* if rating is <= 64 and more than 200 items waiting,
03291          * remove some random amount of goods from the station */
03292         if (rating <= 64 && waiting >= 200) {
03293           int dec = Random() & 0x1F;
03294           if (waiting < 400) dec &= 7;
03295           waiting -= dec + 1;
03296           waiting_changed = true;
03297         }
03298 
03299         /* if rating is <= 127 and there are any items waiting, maybe remove some goods. */
03300         if (rating <= 127 && waiting != 0) {
03301           uint32 r = Random();
03302           if (rating <= (int)GB(r, 0, 7)) {
03303             /* Need to have int, otherwise it will just overflow etc. */
03304             waiting = max((int)waiting - (int)GB(r, 8, 2) - 1, 0);
03305             waiting_changed = true;
03306           }
03307         }
03308 
03309         /* At some point we really must cap the cargo. Previously this
03310          * was a strict 4095, but now we'll have a less strict, but
03311          * increasingly aggressive truncation of the amount of cargo. */
03312         static const uint WAITING_CARGO_THRESHOLD  = 1 << 12;
03313         static const uint WAITING_CARGO_CUT_FACTOR = 1 <<  6;
03314         static const uint MAX_WAITING_CARGO        = 1 << 15;
03315 
03316         if (waiting > WAITING_CARGO_THRESHOLD) {
03317           uint difference = waiting - WAITING_CARGO_THRESHOLD;
03318           waiting -= (difference / WAITING_CARGO_CUT_FACTOR);
03319 
03320           waiting = min(waiting, MAX_WAITING_CARGO);
03321           waiting_changed = true;
03322         }
03323 
03324         if (waiting_changed) ge->cargo.Truncate(waiting);
03325       }
03326     }
03327   }
03328 
03329   StationID index = st->index;
03330   if (waiting_changed) {
03331     SetWindowDirty(WC_STATION_VIEW, index); // update whole window
03332   } else {
03333     SetWindowWidgetDirty(WC_STATION_VIEW, index, WID_SV_ACCEPT_RATING_LIST); // update only ratings list
03334   }
03335 }
03336 
03337 /* called for every station each tick */
03338 static void StationHandleSmallTick(BaseStation *st)
03339 {
03340   if ((st->facilities & FACIL_WAYPOINT) != 0 || !st->IsInUse()) return;
03341 
03342   byte b = st->delete_ctr + 1;
03343   if (b >= STATION_RATING_TICKS) b = 0;
03344   st->delete_ctr = b;
03345 
03346   if (b == 0) UpdateStationRating(Station::From(st));
03347 }
03348 
03349 void OnTick_Station()
03350 {
03351   if (_game_mode == GM_EDITOR) return;
03352 
03353   BaseStation *st;
03354   FOR_ALL_BASE_STATIONS(st) {
03355     StationHandleSmallTick(st);
03356 
03357     /* Run STATION_ACCEPTANCE_TICKS = 250 tick interval trigger for station animation.
03358      * Station index is included so that triggers are not all done
03359      * at the same time. */
03360     if ((_tick_counter + st->index) % STATION_ACCEPTANCE_TICKS == 0) {
03361       /* Stop processing this station if it was deleted */
03362       if (!StationHandleBigTick(st)) continue;
03363       TriggerStationAnimation(st, st->xy, SAT_250_TICKS);
03364       if (Station::IsExpected(st)) AirportAnimationTrigger(Station::From(st), AAT_STATION_250_TICKS);
03365     }
03366   }
03367 }
03368 
03370 void StationMonthlyLoop()
03371 {
03372   Station *st;
03373 
03374   FOR_ALL_STATIONS(st) {
03375     for (CargoID i = 0; i < NUM_CARGO; i++) {
03376       GoodsEntry *ge = &st->goods[i];
03377       SB(ge->acceptance_pickup, GoodsEntry::GES_LAST_MONTH, 1, GB(ge->acceptance_pickup, GoodsEntry::GES_CURRENT_MONTH, 1));
03378       ClrBit(ge->acceptance_pickup, GoodsEntry::GES_CURRENT_MONTH);
03379     }
03380   }
03381 }
03382 
03383 
03384 void ModifyStationRatingAround(TileIndex tile, Owner owner, int amount, uint radius)
03385 {
03386   Station *st;
03387 
03388   FOR_ALL_STATIONS(st) {
03389     if (st->owner == owner &&
03390         DistanceManhattan(tile, st->xy) <= radius) {
03391       for (CargoID i = 0; i < NUM_CARGO; i++) {
03392         GoodsEntry *ge = &st->goods[i];
03393 
03394         if (ge->acceptance_pickup != 0) {
03395           ge->rating = Clamp(ge->rating + amount, 0, 255);
03396         }
03397       }
03398     }
03399   }
03400 }
03401 
03402 static uint UpdateStationWaiting(Station *st, CargoID type, uint amount, SourceType source_type, SourceID source_id)
03403 {
03404   /* We can't allocate a CargoPacket? Then don't do anything
03405    * at all; i.e. just discard the incoming cargo. */
03406   if (!CargoPacket::CanAllocateItem()) return 0;
03407 
03408   GoodsEntry &ge = st->goods[type];
03409   amount += ge.amount_fract;
03410   ge.amount_fract = GB(amount, 0, 8);
03411 
03412   amount >>= 8;
03413   /* No new "real" cargo item yet. */
03414   if (amount == 0) return 0;
03415 
03416   ge.cargo.Append(new CargoPacket(st->index, st->xy, amount, source_type, source_id));
03417 
03418   if (!HasBit(ge.acceptance_pickup, GoodsEntry::GES_PICKUP)) {
03419     InvalidateWindowData(WC_STATION_LIST, st->index);
03420     SetBit(ge.acceptance_pickup, GoodsEntry::GES_PICKUP);
03421   }
03422 
03423   TriggerStationRandomisation(st, st->xy, SRT_NEW_CARGO, type);
03424   TriggerStationAnimation(st, st->xy, SAT_NEW_CARGO, type);
03425   AirportAnimationTrigger(st, AAT_STATION_NEW_CARGO, type);
03426 
03427   SetWindowDirty(WC_STATION_VIEW, st->index);
03428   st->MarkTilesDirty(true);
03429   return amount;
03430 }
03431 
03432 static bool IsUniqueStationName(const char *name)
03433 {
03434   const Station *st;
03435 
03436   FOR_ALL_STATIONS(st) {
03437     if (st->name != NULL && strcmp(st->name, name) == 0) return false;
03438   }
03439 
03440   return true;
03441 }
03442 
03452 CommandCost CmdRenameStation(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
03453 {
03454   Station *st = Station::GetIfValid(p1);
03455   if (st == NULL) return CMD_ERROR;
03456 
03457   CommandCost ret = CheckOwnership(st->owner);
03458   if (ret.Failed()) return ret;
03459 
03460   bool reset = StrEmpty(text);
03461 
03462   if (!reset) {
03463     if (Utf8StringLength(text) >= MAX_LENGTH_STATION_NAME_CHARS) return CMD_ERROR;
03464     if (!IsUniqueStationName(text)) return_cmd_error(STR_ERROR_NAME_MUST_BE_UNIQUE);
03465   }
03466 
03467   if (flags & DC_EXEC) {
03468     free(st->name);
03469     st->name = reset ? NULL : strdup(text);
03470 
03471     st->UpdateVirtCoord();
03472     InvalidateWindowData(WC_STATION_LIST, st->owner, 1);
03473   }
03474 
03475   return CommandCost();
03476 }
03477 
03484 void FindStationsAroundTiles(const TileArea &location, StationList *stations)
03485 {
03486   /* area to search = producer plus station catchment radius */
03487   uint max_rad = (_settings_game.station.modified_catchment ? MAX_CATCHMENT : CA_UNMODIFIED);
03488 
03489   uint x = TileX(location.tile);
03490   uint y = TileY(location.tile);
03491 
03492   uint min_x = (x > max_rad) ? x - max_rad : 0;
03493   uint max_x = x + location.w + max_rad;
03494   uint min_y = (y > max_rad) ? y - max_rad : 0;
03495   uint max_y = y + location.h + max_rad;
03496 
03497   if (min_x == 0 && _settings_game.construction.freeform_edges) min_x = 1;
03498   if (min_y == 0 && _settings_game.construction.freeform_edges) min_y = 1;
03499   if (max_x >= MapSizeX()) max_x = MapSizeX() - 1;
03500   if (max_y >= MapSizeY()) max_y = MapSizeY() - 1;
03501 
03502   for (uint cy = min_y; cy < max_y; cy++) {
03503     for (uint cx = min_x; cx < max_x; cx++) {
03504       TileIndex cur_tile = TileXY(cx, cy);
03505       if (!IsTileType(cur_tile, MP_STATION)) continue;
03506 
03507       Station *st = Station::GetByTile(cur_tile);
03508       /* st can be NULL in case of waypoints */
03509       if (st == NULL) continue;
03510 
03511       if (_settings_game.station.modified_catchment) {
03512         int rad = st->GetCatchmentRadius();
03513         int rad_x = cx - x;
03514         int rad_y = cy - y;
03515 
03516         if (rad_x < -rad || rad_x >= rad + location.w) continue;
03517         if (rad_y < -rad || rad_y >= rad + location.h) continue;
03518       }
03519 
03520       /* Insert the station in the set. This will fail if it has
03521        * already been added.
03522        */
03523       stations->Include(st);
03524     }
03525   }
03526 }
03527 
03532 const StationList *StationFinder::GetStations()
03533 {
03534   if (this->tile != INVALID_TILE) {
03535     FindStationsAroundTiles(*this, &this->stations);
03536     this->tile = INVALID_TILE;
03537   }
03538   return &this->stations;
03539 }
03540 
03541 uint MoveGoodsToStation(CargoID type, uint amount, SourceType source_type, SourceID source_id, const StationList *all_stations)
03542 {
03543   /* Return if nothing to do. Also the rounding below fails for 0. */
03544   if (amount == 0) return 0;
03545 
03546   Station *st1 = NULL;   // Station with best rating
03547   Station *st2 = NULL;   // Second best station
03548   uint best_rating1 = 0; // rating of st1
03549   uint best_rating2 = 0; // rating of st2
03550 
03551   for (Station * const *st_iter = all_stations->Begin(); st_iter != all_stations->End(); ++st_iter) {
03552     Station *st = *st_iter;
03553 
03554     /* Is the station reserved exclusively for somebody else? */
03555     if (st->town->exclusive_counter > 0 && st->town->exclusivity != st->owner) continue;
03556 
03557     if (st->goods[type].rating == 0) continue; // Lowest possible rating, better not to give cargo anymore
03558 
03559     if (_settings_game.order.selectgoods && !st->goods[type].HasVehicleEverTriedLoading()) continue; // Selectively servicing stations, and not this one
03560 
03561     if (IsCargoInClass(type, CC_PASSENGERS)) {
03562       if (st->facilities == FACIL_TRUCK_STOP) continue; // passengers are never served by just a truck stop
03563     } else {
03564       if (st->facilities == FACIL_BUS_STOP) continue; // non-passengers are never served by just a bus stop
03565     }
03566 
03567     /* This station can be used, add it to st1/st2 */
03568     if (st1 == NULL || st->goods[type].rating >= best_rating1) {
03569       st2 = st1; best_rating2 = best_rating1; st1 = st; best_rating1 = st->goods[type].rating;
03570     } else if (st2 == NULL || st->goods[type].rating >= best_rating2) {
03571       st2 = st; best_rating2 = st->goods[type].rating;
03572     }
03573   }
03574 
03575   /* no stations around at all? */
03576   if (st1 == NULL) return 0;
03577 
03578   /* From now we'll calculate with fractal cargo amounts.
03579    * First determine how much cargo we really have. */
03580   amount *= best_rating1 + 1;
03581 
03582   if (st2 == NULL) {
03583     /* only one station around */
03584     return UpdateStationWaiting(st1, type, amount, source_type, source_id);
03585   }
03586 
03587   /* several stations around, the best two (highest rating) are in st1 and st2 */
03588   assert(st1 != NULL);
03589   assert(st2 != NULL);
03590   assert(best_rating1 != 0 || best_rating2 != 0);
03591 
03592   /* Then determine the amount the worst station gets. We do it this way as the
03593    * best should get a bonus, which in this case is the rounding difference from
03594    * this calculation. In reality that will mean the bonus will be pretty low.
03595    * Nevertheless, the best station should always get the most cargo regardless
03596    * of rounding issues. */
03597   uint worst_cargo = amount * best_rating2 / (best_rating1 + best_rating2);
03598   assert(worst_cargo <= (amount - worst_cargo));
03599 
03600   /* And then send the cargo to the stations! */
03601   uint moved = UpdateStationWaiting(st1, type, amount - worst_cargo, source_type, source_id);
03602   /* These two UpdateStationWaiting's can't be in the statement as then the order
03603    * of execution would be undefined and that could cause desyncs with callbacks. */
03604   return moved + UpdateStationWaiting(st2, type, worst_cargo, source_type, source_id);
03605 }
03606 
03607 void BuildOilRig(TileIndex tile)
03608 {
03609   if (!Station::CanAllocateItem()) {
03610     DEBUG(misc, 0, "Can't allocate station for oilrig at 0x%X, reverting to oilrig only", tile);
03611     return;
03612   }
03613 
03614   Station *st = new Station(tile);
03615   st->town = ClosestTownFromTile(tile, UINT_MAX);
03616 
03617   st->string_id = GenerateStationName(st, tile, STATIONNAMING_OILRIG);
03618 
03619   assert(IsTileType(tile, MP_INDUSTRY));
03620   DeleteAnimatedTile(tile);
03621   MakeOilrig(tile, st->index, GetWaterClass(tile));
03622 
03623   st->owner = OWNER_NONE;
03624   st->airport.type = AT_OILRIG;
03625   st->airport.Add(tile);
03626   st->dock_tile = tile;
03627   st->facilities = FACIL_AIRPORT | FACIL_DOCK;
03628   st->build_date = _date;
03629 
03630   st->rect.BeforeAddTile(tile, StationRect::ADD_FORCE);
03631 
03632   st->UpdateVirtCoord();
03633   UpdateStationAcceptance(st, false);
03634   st->RecomputeIndustriesNear();
03635 }
03636 
03637 void DeleteOilRig(TileIndex tile)
03638 {
03639   Station *st = Station::GetByTile(tile);
03640 
03641   MakeWaterKeepingClass(tile, OWNER_NONE);
03642 
03643   st->dock_tile = INVALID_TILE;
03644   st->airport.Clear();
03645   st->facilities &= ~(FACIL_AIRPORT | FACIL_DOCK);
03646   st->airport.flags = 0;
03647 
03648   st->rect.AfterRemoveTile(st, tile);
03649 
03650   st->UpdateVirtCoord();
03651   st->RecomputeIndustriesNear();
03652   if (!st->IsInUse()) delete st;
03653 }
03654 
03655 static void ChangeTileOwner_Station(TileIndex tile, Owner old_owner, Owner new_owner)
03656 {
03657   if (IsRoadStopTile(tile)) {
03658     for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
03659       /* Update all roadtypes, no matter if they are present */
03660       if (GetRoadOwner(tile, rt) == old_owner) {
03661         if (HasTileRoadType(tile, rt)) {
03662           /* A drive-through road-stop has always two road bits. No need to dirty windows here, we'll redraw the whole screen anyway. */
03663           Company::Get(old_owner)->infrastructure.road[rt] -= 2;
03664           if (new_owner != INVALID_OWNER) Company::Get(new_owner)->infrastructure.road[rt] += 2;
03665         }
03666         SetRoadOwner(tile, rt, new_owner == INVALID_OWNER ? OWNER_NONE : new_owner);
03667       }
03668     }
03669   }
03670 
03671   if (!IsTileOwner(tile, old_owner)) return;
03672 
03673   if (new_owner != INVALID_OWNER) {
03674     /* Update company infrastructure counts. Only do it here
03675      * if the new owner is valid as otherwise the clear
03676      * command will do it for us. No need to dirty windows
03677      * here, we'll redraw the whole screen anyway.*/
03678     Company *old_company = Company::Get(old_owner);
03679     Company *new_company = Company::Get(new_owner);
03680 
03681     /* Update counts for underlying infrastructure. */
03682     switch (GetStationType(tile)) {
03683       case STATION_RAIL:
03684       case STATION_WAYPOINT:
03685         if (!IsStationTileBlocked(tile)) {
03686           old_company->infrastructure.rail[GetRailType(tile)]--;
03687           new_company->infrastructure.rail[GetRailType(tile)]++;
03688         }
03689         break;
03690 
03691       case STATION_BUS:
03692       case STATION_TRUCK:
03693         /* Road stops were already handled above. */
03694         break;
03695 
03696       case STATION_BUOY:
03697       case STATION_DOCK:
03698         if (GetWaterClass(tile) == WATER_CLASS_CANAL) {
03699           old_company->infrastructure.water--;
03700           new_company->infrastructure.water++;
03701         }
03702         break;
03703 
03704       default:
03705         break;
03706     }
03707 
03708     /* Update station tile count. */
03709     if (!IsBuoy(tile) && !IsAirport(tile)) {
03710       old_company->infrastructure.station--;
03711       new_company->infrastructure.station++;
03712     }
03713 
03714     /* for buoys, owner of tile is owner of water, st->owner == OWNER_NONE */
03715     SetTileOwner(tile, new_owner);
03716     InvalidateWindowClassesData(WC_STATION_LIST, 0);
03717   } else {
03718     if (IsDriveThroughStopTile(tile)) {
03719       /* Remove the drive-through road stop */
03720       DoCommand(tile, 1 | 1 << 8, (GetStationType(tile) == STATION_TRUCK) ? ROADSTOP_TRUCK : ROADSTOP_BUS, DC_EXEC | DC_BANKRUPT, CMD_REMOVE_ROAD_STOP);
03721       assert(IsTileType(tile, MP_ROAD));
03722       /* Change owner of tile and all roadtypes */
03723       ChangeTileOwner(tile, old_owner, new_owner);
03724     } else {
03725       DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR);
03726       /* Set tile owner of water under (now removed) buoy and dock to OWNER_NONE.
03727        * Update owner of buoy if it was not removed (was in orders).
03728        * Do not update when owned by OWNER_WATER (sea and rivers). */
03729       if ((IsTileType(tile, MP_WATER) || IsBuoyTile(tile)) && IsTileOwner(tile, old_owner)) SetTileOwner(tile, OWNER_NONE);
03730     }
03731   }
03732 }
03733 
03742 static bool CanRemoveRoadWithStop(TileIndex tile, DoCommandFlag flags)
03743 {
03744   /* Yeah... water can always remove stops, right? */
03745   if (_current_company == OWNER_WATER) return true;
03746 
03747   RoadTypes rts = GetRoadTypes(tile);
03748   if (HasBit(rts, ROADTYPE_TRAM)) {
03749     Owner tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
03750     if (tram_owner != OWNER_NONE && CheckOwnership(tram_owner).Failed()) return false;
03751   }
03752   if (HasBit(rts, ROADTYPE_ROAD)) {
03753     Owner road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
03754     if (road_owner != OWNER_TOWN) {
03755       if (road_owner != OWNER_NONE && CheckOwnership(road_owner).Failed()) return false;
03756     } else {
03757       if (CheckAllowRemoveRoad(tile, GetAnyRoadBits(tile, ROADTYPE_ROAD), OWNER_TOWN, ROADTYPE_ROAD, flags).Failed()) return false;
03758     }
03759   }
03760 
03761   return true;
03762 }
03763 
03770 CommandCost ClearTile_Station(TileIndex tile, DoCommandFlag flags)
03771 {
03772   if (flags & DC_AUTO) {
03773     switch (GetStationType(tile)) {
03774       default: break;
03775       case STATION_RAIL:     return_cmd_error(STR_ERROR_MUST_DEMOLISH_RAILROAD);
03776       case STATION_WAYPOINT: return_cmd_error(STR_ERROR_BUILDING_MUST_BE_DEMOLISHED);
03777       case STATION_AIRPORT:  return_cmd_error(STR_ERROR_MUST_DEMOLISH_AIRPORT_FIRST);
03778       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);
03779       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);
03780       case STATION_BUOY:     return_cmd_error(STR_ERROR_BUOY_IN_THE_WAY);
03781       case STATION_DOCK:     return_cmd_error(STR_ERROR_MUST_DEMOLISH_DOCK_FIRST);
03782       case STATION_OILRIG:
03783         SetDParam(1, STR_INDUSTRY_NAME_OIL_RIG);
03784         return_cmd_error(STR_ERROR_GENERIC_OBJECT_IN_THE_WAY);
03785     }
03786   }
03787 
03788   switch (GetStationType(tile)) {
03789     case STATION_RAIL:     return RemoveRailStation(tile, flags);
03790     case STATION_WAYPOINT: return RemoveRailWaypoint(tile, flags);
03791     case STATION_AIRPORT:  return RemoveAirport(tile, flags);
03792     case STATION_TRUCK:
03793       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags)) {
03794         return_cmd_error(STR_ERROR_MUST_DEMOLISH_TRUCK_STATION_FIRST);
03795       }
03796       return RemoveRoadStop(tile, flags);
03797     case STATION_BUS:
03798       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags)) {
03799         return_cmd_error(STR_ERROR_MUST_DEMOLISH_BUS_STATION_FIRST);
03800       }
03801       return RemoveRoadStop(tile, flags);
03802     case STATION_BUOY:     return RemoveBuoy(tile, flags);
03803     case STATION_DOCK:     return RemoveDock(tile, flags);
03804     default: break;
03805   }
03806 
03807   return CMD_ERROR;
03808 }
03809 
03810 static CommandCost TerraformTile_Station(TileIndex tile, DoCommandFlag flags, int z_new, Slope tileh_new)
03811 {
03812   if (_settings_game.construction.build_on_slopes && AutoslopeEnabled()) {
03813     /* TODO: If you implement newgrf callback 149 'land slope check', you have to decide what to do with it here.
03814      *       TTDP does not call it.
03815      */
03816     if (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new)) {
03817       switch (GetStationType(tile)) {
03818         case STATION_WAYPOINT:
03819         case STATION_RAIL: {
03820           DiagDirection direction = AxisToDiagDir(GetRailStationAxis(tile));
03821           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
03822           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
03823           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03824         }
03825 
03826         case STATION_AIRPORT:
03827           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03828 
03829         case STATION_TRUCK:
03830         case STATION_BUS: {
03831           DiagDirection direction = GetRoadStopDir(tile);
03832           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
03833           if (IsDriveThroughStopTile(tile)) {
03834             if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
03835           }
03836           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03837         }
03838 
03839         default: break;
03840       }
03841     }
03842   }
03843   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
03844 }
03845 
03846 
03847 extern const TileTypeProcs _tile_type_station_procs = {
03848   DrawTile_Station,           // draw_tile_proc
03849   GetSlopePixelZ_Station,     // get_slope_z_proc
03850   ClearTile_Station,          // clear_tile_proc
03851   NULL,                       // add_accepted_cargo_proc
03852   GetTileDesc_Station,        // get_tile_desc_proc
03853   GetTileTrackStatus_Station, // get_tile_track_status_proc
03854   ClickTile_Station,          // click_tile_proc
03855   AnimateTile_Station,        // animate_tile_proc
03856   TileLoop_Station,           // tile_loop_proc
03857   ChangeTileOwner_Station,    // change_tile_owner_proc
03858   NULL,                       // add_produced_cargo_proc
03859   VehicleEnter_Station,       // vehicle_enter_tile_proc
03860   GetFoundation_Station,      // get_foundation_proc
03861   TerraformTile_Station,      // terraform_tile_proc
03862 };