cpp/openttd-patchpack/source Changeset - r5584:545d748cc681

Changeset - r5584:545d748cc681

Parent rev.

Child rev.

[Not reviewed]

master

! ! !

KUDr - 18 years ago 2007-01-10 18:12:09
kudr@openttd.org

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

6 files changed:

src/ai/ai.c

247

src/ai/ai.cpp

247

src/ai/default/default.c

3934

src/ai/default/default.cpp

3934

src/ai/trolly/build.c

324

src/ai/trolly/build.cpp

324

Changeset was too big and was cut off... Show full diff anyway

0 comments (0 inline, 0 general)

src/ai/ai.c

➞

Show inline comments

deleted file

src/ai/ai.cpp

➞

Show inline comments

@@ new file 100644 @@
 /* $Id$ */
 #include "../stdafx.h"
 #include "../openttd.h"
 #include "../variables.h"
 #include "../command.h"
 #include "../network/network.h"
 #include "ai.h"
 #include "default/default.h"
 /**
  * Dequeues commands put in the queue via AI_PutCommandInQueue.
  */
 static void AI_DequeueCommands(PlayerID player)
+{
 	AICommand *com, *entry_com;
 	entry_com = _ai_player[player].queue;
 	/* It happens that DoCommandP issues a new DoCommandAI which adds a new command
 	 *  to this very same queue (don't argue about this, if it currently doesn't
 	 *  happen I can tell you it will happen with AIScript -- TrueLight). If we
 	 *  do not make the queue NULL, that commands will be dequeued immediatly.
 	 *  Therefor we safe the entry-point to entry_com, and make the queue NULL, so
 	 *  the new queue can be safely built up. */
 	_ai_player[player].queue = NULL;
 	_ai_player[player].queue_tail = NULL;
 	/* Dequeue all commands */
 	while ((com = entry_com) != NULL) {
 		_current_player = player;
 		_cmd_text = com->text;
 		DoCommandP(com->tile, com->p1, com->p2, com->callback, com->procc);
 		/* Free item */
 		entry_com = com->next;
 		free(com->text);
 		free(com);
+	}
+}
 /**
  * Needed for SP; we need to delay DoCommand with 1 tick, because else events
  *  will make infinite loops (AIScript).
  */
 static void AI_PutCommandInQueue(PlayerID player, TileIndex tile, uint32 p1, uint32 p2, uint procc, CommandCallback* callback)
+{
 	AICommand *com;
 	if (_ai_player[player].queue_tail == NULL) {
 		/* There is no item in the queue yet, create the queue */
 		_ai_player[player].queue = malloc(sizeof(AICommand));
 		_ai_player[player].queue_tail = _ai_player[player].queue;
 	} else {
 		/* Add an item at the end */
 		_ai_player[player].queue_tail->next = malloc(sizeof(AICommand));
 		_ai_player[player].queue_tail = _ai_player[player].queue_tail->next;
+	}
 	/* This is our new item */
 	com = _ai_player[player].queue_tail;
 	/* Assign the info */
 	com->tile  = tile;
 	com->p1    = p1;
 	com->p2    = p2;
 	com->procc = procc;
 	com->callback = callback;
 	com->next  = NULL;
 	com->text  = NULL;
 	/* Copy the cmd_text, if needed */
 	if (_cmd_text != NULL) {
 		com->text = strdup(_cmd_text);
 		_cmd_text = NULL;
+	}
+}
 /**
  * Executes a raw DoCommand for the AI.
  */
 int32 AI_DoCommandCc(TileIndex tile, uint32 p1, uint32 p2, uint32 flags, uint procc, CommandCallback* callback)
+{
 	PlayerID old_lp;
 	int32 res = 0;
 	const char* tmp_cmdtext;
 	/* If you enable DC_EXEC with DC_QUERY_COST you are a really strange
 	 *   person.. should we check for those funny jokes?
 	 */
 	/* The test already resets _cmd_text, so backup the pointer */
 	tmp_cmdtext = _cmd_text;
 	/* First, do a test-run to see if we can do this */
 	res = DoCommand(tile, p1, p2, flags & ~DC_EXEC, procc);
 	/* The command failed, or you didn't want to execute, or you are quering, return */
 	if (CmdFailed(res) || !(flags & DC_EXEC) || (flags & DC_QUERY_COST)) {
 		return res;
+	}
 	/* Restore _cmd_text */
 	_cmd_text = tmp_cmdtext;
 	/* If we did a DC_EXEC, and the command did not return an error, execute it
 	 * over the network */
 	if (flags & DC_AUTO)     procc |= CMD_AUTO;
 	if (flags & DC_NO_WATER) procc |= CMD_NO_WATER;
 	/* NetworkSend_Command needs _local_player to be set correctly, so
 	 * adjust it, and put it back right after the function */
 	old_lp = _local_player;
 	_local_player = _current_player;
 #ifdef ENABLE_NETWORK
 	/* Send the command */
 	if (_networking) {
 		/* Network is easy, send it to his handler */
 		NetworkSend_Command(tile, p1, p2, procc, callback);
 	} else {
 #else
+	{
 #endif
 		/* If we execute BuildCommands directly in SP, we have a big problem with events
 		 *  so we need to delay is for 1 tick */
 		AI_PutCommandInQueue(_current_player, tile, p1, p2, procc, callback);
+	}
 	/* Set _local_player back */
 	_local_player = old_lp;
 	return res;
+}
 int32 AI_DoCommand(TileIndex tile, uint32 p1, uint32 p2, uint32 flags, uint procc)
+{
 	return AI_DoCommandCc(tile, p1, p2, flags, procc, NULL);
+}
 /**
  * Run 1 tick of the AI. Don't overdo it, keep it realistic.
  */
 static void AI_RunTick(PlayerID player)
+{
 	extern void AiNewDoGameLoop(Player *p);
 	Player *p = GetPlayer(player);
 	_current_player = player;
 	if (_patches.ainew_active) {
 		AiNewDoGameLoop(p);
 	} else {
 		/* Enable all kind of cheats the old AI needs in order to operate correctly... */
 		_is_old_ai_player = true;
 		AiDoGameLoop(p);
 		_is_old_ai_player = false;
+	}
+}
 /**
  * The gameloop for AIs.
  *  Handles one tick for all the AIs.
  */
 void AI_RunGameLoop(void)
+{
 	/* Don't do anything if ai is disabled */
 	if (!_ai.enabled) return;
 	/* Don't do anything if we are a network-client, or the AI has been disabled */
 	if (_networking && (!_network_server || !_patches.ai_in_multiplayer)) return;
 	/* New tick */
 	_ai.tick++;
 	/* Make sure the AI follows the difficulty rule.. */
 	assert(_opt.diff.competitor_speed <= 4);
 	if ((_ai.tick & ((1 << (4 - _opt.diff.competitor_speed)) - 1)) != 0) return;
 	/* Check for AI-client (so joining a network with an AI) */
 	if (!_networking || _network_server) {
 		/* Check if we want to run AIs (server or SP only) */
 		const Player* p;
 		FOR_ALL_PLAYERS(p) {
 			if (p->is_active && p->is_ai) {
 				/* This should always be true, else something went wrong... */
 				assert(_ai_player[p->index].active);
 				/* Run the script */
 				AI_DequeueCommands(p->index);
 				AI_RunTick(p->index);
+			}
+		}
+	}
 	_current_player = OWNER_NONE;
+}
 /**
  * A new AI sees the day of light. You can do here what ever you think is needed.
  */
 void AI_StartNewAI(PlayerID player)
+{
 	assert(IsValidPlayer(player));
 	/* Called if a new AI is booted */
 	_ai_player[player].active = true;
+}
 /**
  * This AI player died. Give it some chance to make a final puf.
  */
 void AI_PlayerDied(PlayerID player)
+{
 	/* Called if this AI died */
 	_ai_player[player].active = false;
+}
 /**
  * Initialize some AI-related stuff.
  */
 void AI_Initialize(void)
+{
 	/* First, make sure all AIs are DEAD! */
 	AI_Uninitialize();
 	memset(&_ai, 0, sizeof(_ai));
 	memset(&_ai_player, 0, sizeof(_ai_player));
 	_ai.enabled = true;
+}
 /**
  * Deinitializer for AI-related stuff.
  */
 void AI_Uninitialize(void)
+{
 	const Player* p;
 	FOR_ALL_PLAYERS(p) {
 		if (p->is_active && p->is_ai) AI_PlayerDied(p->index);
+	}
+}

src/ai/default/default.c

➞

Show inline comments

deleted file

src/ai/default/default.cpp

➞

Show inline comments

@@ new file 100644 @@
 /* $Id$ */
 #include "../../stdafx.h"
 #include "../../openttd.h"
 #include "../../aircraft.h"
 #include "../../bridge_map.h"
 #include "../../functions.h"
 #include "../../map.h"
 #include "../../rail_map.h"
 #include "../../road_map.h"
 #include "../../roadveh.h"
 #include "../../station_map.h"
 #include "../../tile.h"
 #include "../../player.h"
 #include "../../tunnel_map.h"
 #include "../../vehicle.h"
 #include "../../engine.h"
 #include "../../command.h"
 #include "../../town.h"
 #include "../../industry.h"
 #include "../../station.h"
 #include "../../pathfind.h"
 #include "../../economy.h"
 #include "../../airport.h"
 #include "../../depot.h"
 #include "../../variables.h"
 #include "../../bridge.h"
 #include "../../date.h"
 #include "default.h"
 // remove some day perhaps?
 static uint _ai_service_interval;
 typedef void AiStateAction(Player *p);
 enum {
 	AIS_0                            =  0,
 	AIS_1                            =  1,
 	AIS_VEH_LOOP                     =  2,
 	AIS_VEH_CHECK_REPLACE_VEHICLE    =  3,
 	AIS_VEH_DO_REPLACE_VEHICLE       =  4,
 	AIS_WANT_NEW_ROUTE               =  5,
 	AIS_BUILD_DEFAULT_RAIL_BLOCKS    =  6,
 	AIS_BUILD_RAIL                   =  7,
 	AIS_BUILD_RAIL_VEH               =  8,
 	AIS_DELETE_RAIL_BLOCKS           =  9,
 	AIS_BUILD_DEFAULT_ROAD_BLOCKS    = 10,
 	AIS_BUILD_ROAD                   = 11,
 	AIS_BUILD_ROAD_VEHICLES          = 12,
 	AIS_DELETE_ROAD_BLOCKS           = 13,
 	AIS_AIRPORT_STUFF                = 14,
 	AIS_BUILD_DEFAULT_AIRPORT_BLOCKS = 15,
 	AIS_BUILD_AIRCRAFT_VEHICLES      = 16,
 	AIS_CHECK_SHIP_STUFF             = 17,
 	AIS_BUILD_DEFAULT_SHIP_BLOCKS    = 18,
 	AIS_DO_SHIP_STUFF                = 19,
 	AIS_SELL_VEHICLE                 = 20,
 	AIS_REMOVE_STATION               = 21,
 	AIS_REMOVE_TRACK                 = 22,
 	AIS_REMOVE_SINGLE_RAIL_TILE      = 23
 };
 #include "../../table/ai_rail.h"
 static byte GetRailTrackStatus(TileIndex tile)
+{
 	uint32 r = GetTileTrackStatus(tile, TRANSPORT_RAIL);
 	return (byte) (r | r >> 8);
+}
 static void AiCase0(Player *p)
+{
 	p->ai.state = AIS_REMOVE_TRACK;
 	p->ai.state_counter = 0;
+}
 static void AiCase1(Player *p)
+{
 	p->ai.cur_veh = NULL;
 	p->ai.state = AIS_VEH_LOOP;
+}
 static void AiStateVehLoop(Player *p)
+{
 	Vehicle *v;
 	uint index;
 	index = (p->ai.cur_veh == NULL) ? 0 : p->ai.cur_veh->index + 1;
 	FOR_ALL_VEHICLES_FROM(v, index) {
 		if (v->owner != _current_player) continue;
 		if ((v->type == VEH_Train && v->subtype == 0) ||
 				v->type == VEH_Road ||
 				(v->type == VEH_Aircraft && v->subtype <= 2) ||
 				v->type == VEH_Ship) {
 			/* replace engine? */
 			if (v->type == VEH_Train && v->engine_type < 3 &&
 					(_price.build_railvehicle >> 3) < p->player_money) {
 				p->ai.state = AIS_VEH_CHECK_REPLACE_VEHICLE;
 				p->ai.cur_veh = v;
 				return;
+			}
 			/* not profitable? */
 			if (v->age >= 730 &&
 					v->profit_last_year < _price.station_value * 5 &&
 					v->profit_this_year < _price.station_value * 5) {
 				p->ai.state_counter = 0;
 				p->ai.state = AIS_SELL_VEHICLE;
 				p->ai.cur_veh = v;
 				return;
+			}
 			/* not reliable? */
 			if (v->age >= v->max_age || (
 						v->age != 0 &&
 						GetEngine(v->engine_type)->reliability < 35389
 					)) {
 				p->ai.state = AIS_VEH_CHECK_REPLACE_VEHICLE;
 				p->ai.cur_veh = v;
 				return;
+			}
+		}
+	}
 	p->ai.state = AIS_WANT_NEW_ROUTE;
 	p->ai.state_counter = 0;
+}
 static EngineID AiChooseTrainToBuild(RailType railtype, int32 money, byte flag, TileIndex tile)
+{
 	EngineID best_veh_index = INVALID_ENGINE;
 	byte best_veh_score = 0;
 	int32 ret;
 	EngineID i;
 	for (i = 0; i < NUM_TRAIN_ENGINES; i++) {
 		const RailVehicleInfo *rvi = RailVehInfo(i);
 		const Engine* e = GetEngine(i);
 		if (!IsCompatibleRail(e->railtype, railtype) ||
 				rvi->flags & RVI_WAGON ||
 				(rvi->flags & RVI_MULTIHEAD && flag & 1) ||
 				!HASBIT(e->player_avail, _current_player) ||
 				e->reliability < 0x8A3D) {
 			continue;
+		}
 		ret = DoCommand(tile, i, 0, 0, CMD_BUILD_RAIL_VEHICLE);
 		if (!CmdFailed(ret) && ret <= money && rvi->ai_rank >= best_veh_score) {
 			best_veh_score = rvi->ai_rank;
 			best_veh_index = i;
+		}
+	}
 	return best_veh_index;
+}
 static EngineID AiChooseRoadVehToBuild(CargoID cargo, int32 money, TileIndex tile)
+{
 	EngineID best_veh_index = INVALID_ENGINE;
 	int32 best_veh_rating = 0;
 	EngineID i = ROAD_ENGINES_INDEX;
 	EngineID end = i + NUM_ROAD_ENGINES;
 	for (; i != end; i++) {
 		const RoadVehicleInfo *rvi = RoadVehInfo(i);
 		const Engine* e = GetEngine(i);
 		int32 rating;
 		int32 ret;
 		if (!HASBIT(e->player_avail, _current_player) || e->reliability < 0x8A3D) {
 			continue;
+		}
 		/* Skip vehicles which can't take our cargo type */
 		if (rvi->cargo_type != cargo && !CanRefitTo(i, cargo)) continue;
 		/* Rate and compare the engine by speed & capacity */
 		rating = rvi->max_speed * rvi->capacity;
 		if (rating <= best_veh_rating) continue;
 		ret = DoCommand(tile, i, 0, 0, CMD_BUILD_ROAD_VEH);
 		if (CmdFailed(ret)) continue;
 		/* Add the cost of refitting */
 		if (rvi->cargo_type != cargo) ret += GetRefitCost(i);
 		if (ret > money) continue;
 		best_veh_rating = rating;
 		best_veh_index = i;
+	}
 	return best_veh_index;
+}
 static EngineID AiChooseAircraftToBuild(int32 money, byte flag)
+{
 	EngineID best_veh_index = INVALID_ENGINE;
 	int32 best_veh_cost = 0;
 	EngineID i;
 	for (i = AIRCRAFT_ENGINES_INDEX; i != AIRCRAFT_ENGINES_INDEX + NUM_AIRCRAFT_ENGINES; i++) {
 		const Engine* e = GetEngine(i);
 		int32 ret;
 		if (!HASBIT(e->player_avail, _current_player) || e->reliability < 0x8A3D) {
 			continue;
+		}
 		if ((AircraftVehInfo(i)->subtype & AIR_CTOL) != flag) continue;
 		ret = DoCommand(0, i, 0, DC_QUERY_COST, CMD_BUILD_AIRCRAFT);
 		if (!CmdFailed(ret) && ret <= money && ret >= best_veh_cost) {
 			best_veh_cost = ret;
 			best_veh_index = i;
+		}
+	}
 	return best_veh_index;
+}
 static int32 AiGetBasePrice(const Player* p)
+{
 	int32 base = _price.station_value;
 	// adjust base price when more expensive vehicles are available
 	switch (p->ai.railtype_to_use) {
 		default: NOT_REACHED();
 		case RAILTYPE_RAIL:     break;
 		case RAILTYPE_ELECTRIC: break;
 		case RAILTYPE_MONO:     base = (base * 3) >> 1; break;
 		case RAILTYPE_MAGLEV:   base *= 2; break;
+	}
 	return base;
+}
 #if 0
 static EngineID AiChooseShipToBuild(byte cargo, int32 money)
+{
 	// XXX: not done
 	return INVALID_ENGINE;
+}
 #endif
 static EngineID AiChooseRoadVehToReplaceWith(const Player* p, const Vehicle* v)
+{
 	int32 avail_money = p->player_money + v->value;
 	return AiChooseRoadVehToBuild(v->cargo_type, avail_money, v->tile);
+}
 static EngineID AiChooseAircraftToReplaceWith(const Player* p, const Vehicle* v)
+{
 	int32 avail_money = p->player_money + v->value;
 	return AiChooseAircraftToBuild(
 		avail_money, AircraftVehInfo(v->engine_type)->subtype & AIR_CTOL
 	);
+}
 static EngineID AiChooseTrainToReplaceWith(const Player* p, const Vehicle* v)
+{
 	int32 avail_money = p->player_money + v->value;
 	const Vehicle* u = v;
 	int num = 0;
 	while (++num, u->next != NULL) {
 		u = u->next;
+	}
 	// XXX: check if a wagon
 	return AiChooseTrainToBuild(v->u.rail.railtype, avail_money, 0, v->tile);
+}
 static EngineID AiChooseShipToReplaceWith(const Player* p, const Vehicle* v)
+{
 	error("!AiChooseShipToReplaceWith");
 	/* maybe useless, but avoids compiler warning this way */
 	return INVALID_ENGINE;
+}
 static void AiHandleGotoDepot(Player *p, int cmd)
+{
 	if (p->ai.cur_veh->current_order.type != OT_GOTO_DEPOT)
 		DoCommand(0, p->ai.cur_veh->index, 0, DC_EXEC, cmd);
 	if (++p->ai.state_counter <= 1387) {
 		p->ai.state = AIS_VEH_DO_REPLACE_VEHICLE;
 		return;
+	}
 	if (p->ai.cur_veh->current_order.type == OT_GOTO_DEPOT) {
 		p->ai.cur_veh->current_order.type = OT_DUMMY;
 		p->ai.cur_veh->current_order.flags = 0;
 		InvalidateWindow(WC_VEHICLE_VIEW, p->ai.cur_veh->index);
+	}
+}
 static void AiRestoreVehicleOrders(Vehicle *v, BackuppedOrders *bak)
+{
 	uint i;
 	for (i = 0; bak->order[i].type != OT_NOTHING; i++) {
 		if (!DoCommandP(0, v->index + (i << 16), PackOrder(&bak->order[i]), NULL, CMD_INSERT_ORDER | CMD_NO_TEST_IF_IN_NETWORK))
 			break;
+	}
+}
 static void AiHandleReplaceTrain(Player *p)
+{
 	const Vehicle* v = p->ai.cur_veh;
 	BackuppedOrders orderbak[1];
 	EngineID veh;
 	// wait until the vehicle reaches the depot.
 	if (!IsTileDepotType(v->tile, TRANSPORT_RAIL) || v->u.rail.track != 0x80 || !(v->vehstatus&VS_STOPPED)) {
 		AiHandleGotoDepot(p, CMD_SEND_TRAIN_TO_DEPOT);
 		return;
+	}
 	veh = AiChooseTrainToReplaceWith(p, v);
 	if (veh != INVALID_ENGINE) {
 		TileIndex tile;
 		BackupVehicleOrders(v, orderbak);
 		tile = v->tile;
 		if (!CmdFailed(DoCommand(0, v->index, 2, DC_EXEC, CMD_SELL_RAIL_WAGON)) &&
 				!CmdFailed(DoCommand(tile, veh, 0, DC_EXEC, CMD_BUILD_RAIL_VEHICLE))) {
 			VehicleID veh = _new_vehicle_id;
 			AiRestoreVehicleOrders(GetVehicle(veh), orderbak);
 			DoCommand(0, veh, 0, DC_EXEC, CMD_START_STOP_TRAIN);
 			DoCommand(0, veh, _ai_service_interval, DC_EXEC, CMD_CHANGE_SERVICE_INT);
+		}
+	}
+}
 static void AiHandleReplaceRoadVeh(Player *p)
+{
 	const Vehicle* v = p->ai.cur_veh;
 	BackuppedOrders orderbak[1];
 	EngineID veh;
 	if (!IsRoadVehInDepotStopped(v)) {
 		AiHandleGotoDepot(p, CMD_SEND_ROADVEH_TO_DEPOT);
 		return;
+	}
 	veh = AiChooseRoadVehToReplaceWith(p, v);
 	if (veh != INVALID_ENGINE) {
 		TileIndex tile;
 		BackupVehicleOrders(v, orderbak);
 		tile = v->tile;
 		if (!CmdFailed(DoCommand(0, v->index, 0, DC_EXEC, CMD_SELL_ROAD_VEH)) &&
 				!CmdFailed(DoCommand(tile, veh, 0, DC_EXEC, CMD_BUILD_ROAD_VEH))) {
 			VehicleID veh = _new_vehicle_id;
 			AiRestoreVehicleOrders(GetVehicle(veh), orderbak);
 			DoCommand(0, veh, 0, DC_EXEC, CMD_START_STOP_ROADVEH);
 			DoCommand(0, veh, _ai_service_interval, DC_EXEC, CMD_CHANGE_SERVICE_INT);
+		}
+	}
+}
 static void AiHandleReplaceAircraft(Player *p)
+{
 	const Vehicle* v = p->ai.cur_veh;
 	BackuppedOrders orderbak[1];
 	EngineID veh;
 	if (!IsAircraftInHangarStopped(v)) {
 		AiHandleGotoDepot(p, CMD_SEND_AIRCRAFT_TO_HANGAR);
 		return;
+	}
 	veh = AiChooseAircraftToReplaceWith(p, v);
 	if (veh != INVALID_ENGINE) {
 		TileIndex tile;
 		BackupVehicleOrders(v, orderbak);
 		tile = v->tile;
 		if (!CmdFailed(DoCommand(0, v->index, 0, DC_EXEC, CMD_SELL_AIRCRAFT)) &&
 				!CmdFailed(DoCommand(tile, veh, 0, DC_EXEC, CMD_BUILD_AIRCRAFT))) {
 			VehicleID veh = _new_vehicle_id;
 			AiRestoreVehicleOrders(GetVehicle(veh), orderbak);
 			DoCommand(0, veh, 0, DC_EXEC, CMD_START_STOP_AIRCRAFT);
 			DoCommand(0, veh, _ai_service_interval, DC_EXEC, CMD_CHANGE_SERVICE_INT);
+		}
+	}
+}
 static void AiHandleReplaceShip(Player *p)
+{
 	error("!AiHandleReplaceShip");
+}
 typedef EngineID CheckReplaceProc(const Player* p, const Vehicle* v);
 static CheckReplaceProc* const _veh_check_replace_proc[] = {
 	AiChooseTrainToReplaceWith,
 	AiChooseRoadVehToReplaceWith,
 	AiChooseShipToReplaceWith,
 	AiChooseAircraftToReplaceWith,
 };
 typedef void DoReplaceProc(Player *p);
 static DoReplaceProc* const _veh_do_replace_proc[] = {
 	AiHandleReplaceTrain,
 	AiHandleReplaceRoadVeh,
 	AiHandleReplaceShip,
 	AiHandleReplaceAircraft
 };
 static void AiStateCheckReplaceVehicle(Player *p)
+{
 	const Vehicle* v = p->ai.cur_veh;
 	if (!IsValidVehicle(v) ||
 			v->owner != _current_player ||
 			v->type > VEH_Ship ||
 			_veh_check_replace_proc[v->type - VEH_Train](p, v) == INVALID_ENGINE) {
 		p->ai.state = AIS_VEH_LOOP;
 	} else {
 		p->ai.state_counter = 0;
 		p->ai.state = AIS_VEH_DO_REPLACE_VEHICLE;
+	}
+}
 static void AiStateDoReplaceVehicle(Player *p)
+{
 	const Vehicle* v = p->ai.cur_veh;
 	p->ai.state = AIS_VEH_LOOP;
 	// vehicle is not owned by the player anymore, something went very wrong.
 	if (!IsValidVehicle(v) || v->owner != _current_player) return;
 	_veh_do_replace_proc[v->type - VEH_Train](p);
+}
 typedef struct FoundRoute {
 	int distance;
 	CargoID cargo;
 	void *from;
 	void *to;
 } FoundRoute;
 static Town *AiFindRandomTown(void)
+{
 	return GetRandomTown();
+}
 static Industry *AiFindRandomIndustry(void)
+{
 	return GetRandomIndustry();
+}
 static void AiFindSubsidyIndustryRoute(FoundRoute *fr)
+{
 	uint i;
 	CargoID cargo;
 	const Subsidy* s;
 	Industry* from;
 	TileIndex to_xy;
 	// initially error
 	fr->distance = -1;
 	// Randomize subsidy index..
 	i = RandomRange(lengthof(_subsidies) * 3);
 	if (i >= lengthof(_subsidies)) return;
 	s = &_subsidies[i];
 	// Don't want passengers or mail
 	cargo = s->cargo_type;
 	if (cargo == CT_INVALID ||
 			cargo == CT_PASSENGERS ||
 			cargo == CT_MAIL ||
 			s->age > 7) {
 		return;
+	}
 	fr->cargo = cargo;
 	fr->from = from = GetIndustry(s->from);
 	if (cargo == CT_GOODS || cargo == CT_FOOD) {
 		Town* to_tow = GetTown(s->to);
 		if (to_tow->population < (cargo == CT_FOOD ? 200U : 900U)) return; // error
 		fr->to = to_tow;
 		to_xy = to_tow->xy;
 	} else {
 		Industry* to_ind = GetIndustry(s->to);
 		fr->to = to_ind;
 		to_xy = to_ind->xy;
+	}
 	fr->distance = DistanceManhattan(from->xy, to_xy);
+}
 static void AiFindSubsidyPassengerRoute(FoundRoute *fr)
+{
 	uint i;
 	const Subsidy* s;
 	Town *from,*to;
 	// initially error
 	fr->distance = -1;
 	// Randomize subsidy index..
 	i = RandomRange(lengthof(_subsidies) * 3);
 	if (i >= lengthof(_subsidies)) return;
 	s = &_subsidies[i];
 	// Only want passengers
 	if (s->cargo_type != CT_PASSENGERS || s->age > 7) return;
 	fr->cargo = s->cargo_type;
 	fr->from = from = GetTown(s->from);
 	fr->to = to = GetTown(s->to);
 	// They must be big enough
 	if (from->population < 400 || to->population < 400) return;
 	fr->distance = DistanceManhattan(from->xy, to->xy);
+}
 static void AiFindRandomIndustryRoute(FoundRoute *fr)
+{
 	Industry* i;
 	uint32 r;
 	CargoID cargo;
 	// initially error
 	fr->distance = -1;
 	r = Random();
 	// pick a source
 	fr->from = i = AiFindRandomIndustry();
 	if (i == NULL) return;
 	// pick a random produced cargo
 	cargo = i->produced_cargo[0];
 	if (r & 1 && i->produced_cargo[1] != CT_INVALID) cargo = i->produced_cargo[1];
 	fr->cargo = cargo;
 	// don't allow passengers
 	if (cargo == CT_INVALID || cargo == CT_PASSENGERS) return;
 	if (cargo != CT_GOODS && cargo != CT_FOOD) {
 		// pick a dest, and see if it can receive
 		Industry* i2 = AiFindRandomIndustry();
 		if (i2 == NULL || i == i2 || (
 					i2->accepts_cargo[0] != cargo &&
 					i2->accepts_cargo[1] != cargo &&
 					i2->accepts_cargo[2] != cargo)
 				) {
 			return;
+		}
 		fr->to = i2;
 		fr->distance = DistanceManhattan(i->xy, i2->xy);
 	} else {
 		// pick a dest town, and see if it's big enough
 		Town* t = AiFindRandomTown();
 		if (t == NULL || t->population < (cargo == CT_FOOD ? 200U : 900U)) return;
 		fr->to = t;
 		fr->distance = DistanceManhattan(i->xy, t->xy);
+	}
+}
 static void AiFindRandomPassengerRoute(FoundRoute *fr)
+{
 	Town* source;
 	Town* dest;
 	// initially error
 	fr->distance = -1;
 	fr->from = source = AiFindRandomTown();
 	if (source == NULL || source->population < 400) return;
 	fr->to = dest = AiFindRandomTown();
 	if (dest == NULL || source == dest || dest->population < 400) return;
 	fr->distance = DistanceManhattan(source->xy, dest->xy);
+}
 // Warn: depends on 'xy' being the first element in both Town and Industry
 #define GET_TOWN_OR_INDUSTRY_TILE(p) (((Town*)(p))->xy)
 static bool AiCheckIfRouteIsGood(Player *p, FoundRoute *fr, byte bitmask)
+{
 	TileIndex from_tile, to_tile;
 	Station *st;
 	int dist;
 	uint same_station = 0;
 	// Make sure distance to closest station is < 37 pixels.
 	from_tile = GET_TOWN_OR_INDUSTRY_TILE(fr->from);
 	to_tile = GET_TOWN_OR_INDUSTRY_TILE(fr->to);
 	dist = 0xFFFF;
 	FOR_ALL_STATIONS(st) {
 		int cur;
 		if (st->owner != _current_player) continue;
 		cur = DistanceMax(from_tile, st->xy);
 		if (cur < dist) dist = cur;
 		cur = DistanceMax(to_tile, st->xy);
 		if (cur < dist) dist = cur;
 		if (to_tile == from_tile && st->xy == to_tile) same_station++;
+	}
 	// To prevent the AI from building ten busstations in the same town, do some calculations
 	//  For each road or airport station, we want 350 of population!
 	if ((bitmask == 2 || bitmask == 4) &&
 			same_station > 2 &&
 			((Town*)fr->from)->population < same_station * 350) {
 		return false;
+	}
 	if (dist != 0xFFFF && dist > 37) return false;
 	if (p->ai.route_type_mask != 0 &&
 			!(p->ai.route_type_mask & bitmask) &&
 			!CHANCE16(1, 5)) {
 		return false;
+	}
 	if (fr->cargo == CT_PASSENGERS || fr->cargo == CT_MAIL) {
 		const Town* from = fr->from;
 		const Town* to   = fr->to;
 		if (from->pct_pass_transported > 0x99 ||
 				to->pct_pass_transported > 0x99) {
 			return false;
+		}
 		// Make sure it has a reasonably good rating
 		if (from->ratings[_current_player] < -100 ||
 				to->ratings[_current_player] < -100) {
 			return false;
+		}
 	} else {
 		const Industry* i = (const Industry*)fr->from;
 		if (i->pct_transported[fr->cargo != i->produced_cargo[0]] > 0x99 ||
 				i->total_production[fr->cargo != i->produced_cargo[0]] == 0) {
 			return false;
+		}
+	}
 	p->ai.route_type_mask |= bitmask;
 	return true;
+}
 static byte AiGetDirectionBetweenTiles(TileIndex a, TileIndex b)
+{
 	byte i = (TileX(a) < TileX(b)) ? 1 : 0;
 	if (TileY(a) >= TileY(b)) i ^= 3;
 	return i;
+}
 static TileIndex AiGetPctTileBetween(TileIndex a, TileIndex b, byte pct)
+{
 	return TileXY(
 		TileX(a) + ((TileX(b) - TileX(a)) * pct >> 8),
 		TileY(a) + ((TileY(b) - TileY(a)) * pct >> 8)
 	);
+}
 static void AiWantLongIndustryRoute(Player *p)
+{
 	int i;
 	FoundRoute fr;
 	i = 60;
 	for (;;) {
 		// look for one from the subsidy list
 		AiFindSubsidyIndustryRoute(&fr);
 		if (IS_INT_INSIDE(fr.distance, 60, 90 + 1)) break;
 		// try a random one
 		AiFindRandomIndustryRoute(&fr);
 		if (IS_INT_INSIDE(fr.distance, 60, 90 + 1)) break;
 		// only test 60 times
 		if (--i == 0) return;
+	}
 	if (!AiCheckIfRouteIsGood(p, &fr, 1)) return;
 	// Fill the source field
 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
 	p->ai.src.use_tile = 0;
 	p->ai.src.rand_rng = 9;
 	p->ai.src.cur_building_rule = 0xFF;
 	p->ai.src.unk6 = 1;
 	p->ai.src.unk7 = 0;
 	p->ai.src.buildcmd_a = 0x24;
 	p->ai.src.buildcmd_b = 0xFF;
 	p->ai.src.direction = AiGetDirectionBetweenTiles(
 		p->ai.src.spec_tile,
 		p->ai.dst.spec_tile
 	);
 	p->ai.src.cargo = fr.cargo | 0x80;
 	// Fill the dest field
 	p->ai.dst.use_tile = 0;
 	p->ai.dst.rand_rng = 9;
 	p->ai.dst.cur_building_rule = 0xFF;
 	p->ai.dst.unk6 = 1;
 	p->ai.dst.unk7 = 0;
 	p->ai.dst.buildcmd_a = 0x34;
 	p->ai.dst.buildcmd_b = 0xFF;
 	p->ai.dst.direction = AiGetDirectionBetweenTiles(
 		p->ai.dst.spec_tile,
 		p->ai.src.spec_tile
 	);
 	p->ai.dst.cargo = fr.cargo;
 	// Fill middle field 1
 	p->ai.mid1.spec_tile = AiGetPctTileBetween(
 		p->ai.src.spec_tile,
 		p->ai.dst.spec_tile,
 x55
 	);
 	p->ai.mid1.use_tile = 0;
 	p->ai.mid1.rand_rng = 6;
 	p->ai.mid1.cur_building_rule = 0xFF;
 	p->ai.mid1.unk6 = 2;
 	p->ai.mid1.unk7 = 1;
 	p->ai.mid1.buildcmd_a = 0x30;
 	p->ai.mid1.buildcmd_b = 0xFF;
 	p->ai.mid1.direction = p->ai.src.direction;
 	p->ai.mid1.cargo = fr.cargo;
 	// Fill middle field 2
 	p->ai.mid2.spec_tile = AiGetPctTileBetween(
 		p->ai.src.spec_tile,
 		p->ai.dst.spec_tile,
 xAA
 	);
 	p->ai.mid2.use_tile = 0;
 	p->ai.mid2.rand_rng = 6;
 	p->ai.mid2.cur_building_rule = 0xFF;
 	p->ai.mid2.unk6 = 2;
 	p->ai.mid2.unk7 = 1;
 	p->ai.mid2.buildcmd_a = 0xFF;
 	p->ai.mid2.buildcmd_b = 0xFF;
 	p->ai.mid2.direction = p->ai.dst.direction;
 	p->ai.mid2.cargo = fr.cargo;
 	// Fill common fields
 	p->ai.cargo_type = fr.cargo;
 	p->ai.num_wagons = 3;
 	p->ai.build_kind = 2;
 	p->ai.num_build_rec = 4;
 	p->ai.num_loco_to_build = 2;
 	p->ai.num_want_fullload = 2;
 	p->ai.wagon_list[0] = INVALID_VEHICLE;
 	p->ai.order_list_blocks[0] = 0;
 	p->ai.order_list_blocks[1] = 1;
 	p->ai.order_list_blocks[2] = 255;
 	p->ai.state = AIS_BUILD_DEFAULT_RAIL_BLOCKS;
 	p->ai.state_mode = -1;
 	p->ai.state_counter = 0;
 	p->ai.timeout_counter = 0;
+}
 static void AiWantMediumIndustryRoute(Player *p)
+{
 	int i;
 	FoundRoute fr;
 	i = 60;
 	for (;;) {
 		// look for one from the subsidy list
 		AiFindSubsidyIndustryRoute(&fr);
 		if (IS_INT_INSIDE(fr.distance, 40, 60 + 1)) break;
 		// try a random one
 		AiFindRandomIndustryRoute(&fr);
 		if (IS_INT_INSIDE(fr.distance, 40, 60 + 1)) break;
 		// only test 60 times
 		if (--i == 0) return;
+	}
 	if (!AiCheckIfRouteIsGood(p, &fr, 1)) return;
 	// Fill the source field
 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
 	p->ai.src.use_tile = 0;
 	p->ai.src.rand_rng = 9;
 	p->ai.src.cur_building_rule = 0xFF;
 	p->ai.src.unk6 = 1;
 	p->ai.src.unk7 = 0;
 	p->ai.src.buildcmd_a = 0x10;
 	p->ai.src.buildcmd_b = 0xFF;
 	p->ai.src.direction = AiGetDirectionBetweenTiles(
 		GET_TOWN_OR_INDUSTRY_TILE(fr.from),
 		GET_TOWN_OR_INDUSTRY_TILE(fr.to)
 	);
 	p->ai.src.cargo = fr.cargo | 0x80;
 	// Fill the dest field
 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
 	p->ai.dst.use_tile = 0;
 	p->ai.dst.rand_rng = 9;
 	p->ai.dst.cur_building_rule = 0xFF;
 	p->ai.dst.unk6 = 1;
 	p->ai.dst.unk7 = 0;
 	p->ai.dst.buildcmd_a = 0xFF;
 	p->ai.dst.buildcmd_b = 0xFF;
 	p->ai.dst.direction = AiGetDirectionBetweenTiles(
 		GET_TOWN_OR_INDUSTRY_TILE(fr.to),
 		GET_TOWN_OR_INDUSTRY_TILE(fr.from)
 	);
 	p->ai.dst.cargo = fr.cargo;
 	// Fill common fields
 	p->ai.cargo_type = fr.cargo;
 	p->ai.num_wagons = 3;
 	p->ai.build_kind = 1;
 	p->ai.num_build_rec = 2;
 	p->ai.num_loco_to_build = 1;
 	p->ai.num_want_fullload = 1;
 	p->ai.wagon_list[0] = INVALID_VEHICLE;
 	p->ai.order_list_blocks[0] = 0;
 	p->ai.order_list_blocks[1] = 1;
 	p->ai.order_list_blocks[2] = 255;
 	p->ai.state = AIS_BUILD_DEFAULT_RAIL_BLOCKS;
 	p->ai.state_mode = -1;
 	p->ai.state_counter = 0;
 	p->ai.timeout_counter = 0;
+}
 static void AiWantShortIndustryRoute(Player *p)
+{
 	int i;
 	FoundRoute fr;
 	i = 60;
 	for (;;) {
 		// look for one from the subsidy list
 		AiFindSubsidyIndustryRoute(&fr);
 		if (IS_INT_INSIDE(fr.distance, 15, 40 + 1)) break;
 		// try a random one
 		AiFindRandomIndustryRoute(&fr);
 		if (IS_INT_INSIDE(fr.distance, 15, 40 + 1)) break;
 		// only test 60 times
 		if (--i == 0) return;
+	}
 	if (!AiCheckIfRouteIsGood(p, &fr, 1)) return;
 	// Fill the source field
 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
 	p->ai.src.use_tile = 0;
 	p->ai.src.rand_rng = 9;
 	p->ai.src.cur_building_rule = 0xFF;
 	p->ai.src.unk6 = 1;
 	p->ai.src.unk7 = 0;
 	p->ai.src.buildcmd_a = 0x10;
 	p->ai.src.buildcmd_b = 0xFF;
 	p->ai.src.direction = AiGetDirectionBetweenTiles(
 		GET_TOWN_OR_INDUSTRY_TILE(fr.from),
 		GET_TOWN_OR_INDUSTRY_TILE(fr.to)
 	);
 	p->ai.src.cargo = fr.cargo | 0x80;
 	// Fill the dest field
 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
 	p->ai.dst.use_tile = 0;
 	p->ai.dst.rand_rng = 9;
 	p->ai.dst.cur_building_rule = 0xFF;
 	p->ai.dst.unk6 = 1;
 	p->ai.dst.unk7 = 0;
 	p->ai.dst.buildcmd_a = 0xFF;
 	p->ai.dst.buildcmd_b = 0xFF;
 	p->ai.dst.direction = AiGetDirectionBetweenTiles(
 		GET_TOWN_OR_INDUSTRY_TILE(fr.to),
 		GET_TOWN_OR_INDUSTRY_TILE(fr.from)
 	);
 	p->ai.dst.cargo = fr.cargo;
 	// Fill common fields
 	p->ai.cargo_type = fr.cargo;
 	p->ai.num_wagons = 2;
 	p->ai.build_kind = 1;
 	p->ai.num_build_rec = 2;
 	p->ai.num_loco_to_build = 1;
 	p->ai.num_want_fullload = 1;
 	p->ai.wagon_list[0] = INVALID_VEHICLE;
 	p->ai.order_list_blocks[0] = 0;
 	p->ai.order_list_blocks[1] = 1;
 	p->ai.order_list_blocks[2] = 255;
 	p->ai.state = AIS_BUILD_DEFAULT_RAIL_BLOCKS;
 	p->ai.state_mode = -1;
 	p->ai.state_counter = 0;
 	p->ai.timeout_counter = 0;
+}
 static void AiWantMailRoute(Player *p)
+{
 	int i;
 	FoundRoute fr;
 	i = 60;
 	for (;;) {
 		// look for one from the subsidy list
 		AiFindSubsidyPassengerRoute(&fr);
 		if (IS_INT_INSIDE(fr.distance, 60, 110 + 1)) break;
 		// try a random one
 		AiFindRandomPassengerRoute(&fr);
 		if (IS_INT_INSIDE(fr.distance, 60, 110 + 1)) break;
 		// only test 60 times
 		if (--i == 0) return;
+	}
 	fr.cargo = CT_MAIL;
 	if (!AiCheckIfRouteIsGood(p, &fr, 1)) return;
 	// Fill the source field
 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
 	p->ai.src.use_tile = 0;
 	p->ai.src.rand_rng = 7;
 	p->ai.src.cur_building_rule = 0xFF;
 	p->ai.src.unk6 = 1;
 	p->ai.src.unk7 = 0;
 	p->ai.src.buildcmd_a = 0x24;
 	p->ai.src.buildcmd_b = 0xFF;
 	p->ai.src.direction = AiGetDirectionBetweenTiles(
 		GET_TOWN_OR_INDUSTRY_TILE(fr.from),
 		GET_TOWN_OR_INDUSTRY_TILE(fr.to)
 	);
 	p->ai.src.cargo = fr.cargo;
 	// Fill the dest field
 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
 	p->ai.dst.use_tile = 0;
 	p->ai.dst.rand_rng = 7;
 	p->ai.dst.cur_building_rule = 0xFF;
 	p->ai.dst.unk6 = 1;
 	p->ai.dst.unk7 = 0;
 	p->ai.dst.buildcmd_a = 0x34;
 	p->ai.dst.buildcmd_b = 0xFF;
 	p->ai.dst.direction = AiGetDirectionBetweenTiles(
 		GET_TOWN_OR_INDUSTRY_TILE(fr.to),
 		GET_TOWN_OR_INDUSTRY_TILE(fr.from)
 	);
 	p->ai.dst.cargo = fr.cargo;
 	// Fill middle field 1
 	p->ai.mid1.spec_tile = AiGetPctTileBetween(
 		GET_TOWN_OR_INDUSTRY_TILE(fr.from),
 		GET_TOWN_OR_INDUSTRY_TILE(fr.to),
 x55
 	);
 	p->ai.mid1.use_tile = 0;
 	p->ai.mid1.rand_rng = 6;
 	p->ai.mid1.cur_building_rule = 0xFF;
 	p->ai.mid1.unk6 = 2;
 	p->ai.mid1.unk7 = 1;
 	p->ai.mid1.buildcmd_a = 0x30;
 	p->ai.mid1.buildcmd_b = 0xFF;
 	p->ai.mid1.direction = p->ai.src.direction;
 	p->ai.mid1.cargo = fr.cargo;
 	// Fill middle field 2
 	p->ai.mid2.spec_tile = AiGetPctTileBetween(
 		GET_TOWN_OR_INDUSTRY_TILE(fr.from),
 		GET_TOWN_OR_INDUSTRY_TILE(fr.to),
 xAA
 	);
 	p->ai.mid2.use_tile = 0;
 	p->ai.mid2.rand_rng = 6;
 	p->ai.mid2.cur_building_rule = 0xFF;
 	p->ai.mid2.unk6 = 2;
 	p->ai.mid2.unk7 = 1;
 	p->ai.mid2.buildcmd_a = 0xFF;
 	p->ai.mid2.buildcmd_b = 0xFF;
 	p->ai.mid2.direction = p->ai.dst.direction;
 	p->ai.mid2.cargo = fr.cargo;
 	// Fill common fields
 	p->ai.cargo_type = fr.cargo;
 	p->ai.num_wagons = 3;
 	p->ai.build_kind = 2;
 	p->ai.num_build_rec = 4;
 	p->ai.num_loco_to_build = 2;
 	p->ai.num_want_fullload = 0;
 	p->ai.wagon_list[0] = INVALID_VEHICLE;
 	p->ai.order_list_blocks[0] = 0;
 	p->ai.order_list_blocks[1] = 1;
 	p->ai.order_list_blocks[2] = 255;
 	p->ai.state = AIS_BUILD_DEFAULT_RAIL_BLOCKS;
 	p->ai.state_mode = -1;
 	p->ai.state_counter = 0;
 	p->ai.timeout_counter = 0;
+}
 static void AiWantPassengerRoute(Player *p)
+{
 	int i;
 	FoundRoute fr;
 	i = 60;
 	for (;;) {
 		// look for one from the subsidy list
 		AiFindSubsidyPassengerRoute(&fr);
 		if (IS_INT_INSIDE(fr.distance, 0, 55 + 1)) break;
 		// try a random one
 		AiFindRandomPassengerRoute(&fr);
 		if (IS_INT_INSIDE(fr.distance, 0, 55 + 1)) break;
 		// only test 60 times
 		if (--i == 0) return;
+	}
 	fr.cargo = CT_PASSENGERS;
 	if (!AiCheckIfRouteIsGood(p, &fr, 1)) return;
 	// Fill the source field
 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
 	p->ai.src.use_tile = 0;
 	p->ai.src.rand_rng = 7;
 	p->ai.src.cur_building_rule = 0xFF;
 	p->ai.src.unk6 = 1;
 	p->ai.src.unk7 = 0;
 	p->ai.src.buildcmd_a = 0x10;
 	p->ai.src.buildcmd_b = 0xFF;
 	p->ai.src.direction = AiGetDirectionBetweenTiles(
 		GET_TOWN_OR_INDUSTRY_TILE(fr.from),
 		GET_TOWN_OR_INDUSTRY_TILE(fr.to)
 	);
 	p->ai.src.cargo = fr.cargo;
 	// Fill the dest field
 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
 	p->ai.dst.use_tile = 0;
 	p->ai.dst.rand_rng = 7;
 	p->ai.dst.cur_building_rule = 0xFF;
 	p->ai.dst.unk6 = 1;
 	p->ai.dst.unk7 = 0;
 	p->ai.dst.buildcmd_a = 0xFF;
 	p->ai.dst.buildcmd_b = 0xFF;
 	p->ai.dst.direction = AiGetDirectionBetweenTiles(
 		GET_TOWN_OR_INDUSTRY_TILE(fr.to),
 		GET_TOWN_OR_INDUSTRY_TILE(fr.from)
 	);
 	p->ai.dst.cargo = fr.cargo;
 	// Fill common fields
 	p->ai.cargo_type = fr.cargo;
 	p->ai.num_wagons = 2;
 	p->ai.build_kind = 1;
 	p->ai.num_build_rec = 2;
 	p->ai.num_loco_to_build = 1;
 	p->ai.num_want_fullload = 0;
 	p->ai.wagon_list[0] = INVALID_VEHICLE;
 	p->ai.order_list_blocks[0] = 0;
 	p->ai.order_list_blocks[1] = 1;
 	p->ai.order_list_blocks[2] = 255;
 	p->ai.state = AIS_BUILD_DEFAULT_RAIL_BLOCKS;
 	p->ai.state_mode = -1;
 	p->ai.state_counter = 0;
 	p->ai.timeout_counter = 0;
+}
 static void AiWantTrainRoute(Player *p)
+{
 	uint16 r = GB(Random(), 0, 16);
 	p->ai.railtype_to_use = GetBestRailtype(p);
 	if (r > 0xD000) {
 		AiWantLongIndustryRoute(p);
 	} else if (r > 0x6000) {
 		AiWantMediumIndustryRoute(p);
 	} else if (r > 0x1000) {
 		AiWantShortIndustryRoute(p);
 	} else if (r > 0x800) {
 		AiWantPassengerRoute(p);
 	} else {
 		AiWantMailRoute(p);
+	}
+}
 static void AiWantLongRoadIndustryRoute(Player *p)
+{
 	int i;
 	FoundRoute fr;
 	i = 60;
 	for (;;) {
 		// look for one from the subsidy list
 		AiFindSubsidyIndustryRoute(&fr);
 		if (IS_INT_INSIDE(fr.distance, 35, 55 + 1)) break;
 		// try a random one
 		AiFindRandomIndustryRoute(&fr);
 		if (IS_INT_INSIDE(fr.distance, 35, 55 + 1)) break;
 		// only test 60 times
 		if (--i == 0) return;
+	}
 	if (!AiCheckIfRouteIsGood(p, &fr, 2)) return;
 	// Fill the source field
 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
 	p->ai.src.use_tile = 0;
 	p->ai.src.rand_rng = 9;
 	p->ai.src.cur_building_rule = 0xFF;
 	p->ai.src.buildcmd_a = 1;
 	p->ai.src.direction = 0;
 	p->ai.src.cargo = fr.cargo | 0x80;
 	// Fill the dest field
 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
 	p->ai.dst.use_tile = 0;
 	p->ai.dst.rand_rng = 9;
 	p->ai.dst.cur_building_rule = 0xFF;
 	p->ai.dst.buildcmd_a = 0xFF;
 	p->ai.dst.direction = 0;
 	p->ai.dst.cargo = fr.cargo;
 	// Fill common fields
 	p->ai.cargo_type = fr.cargo;
 	p->ai.num_build_rec = 2;
 	p->ai.num_loco_to_build = 5;
 	p->ai.num_want_fullload = 5;
 //	p->ai.loco_id = INVALID_VEHICLE;
 	p->ai.order_list_blocks[0] = 0;
 	p->ai.order_list_blocks[1] = 1;
 	p->ai.order_list_blocks[2] = 255;
 	p->ai.state = AIS_BUILD_DEFAULT_ROAD_BLOCKS;
 	p->ai.state_mode = -1;
 	p->ai.state_counter = 0;
 	p->ai.timeout_counter = 0;
+}
 static void AiWantMediumRoadIndustryRoute(Player *p)
+{
 	int i;
 	FoundRoute fr;
 	i = 60;
 	for (;;) {
 		// look for one from the subsidy list
 		AiFindSubsidyIndustryRoute(&fr);
 		if (IS_INT_INSIDE(fr.distance, 15, 40 + 1)) break;
 		// try a random one
 		AiFindRandomIndustryRoute(&fr);
 		if (IS_INT_INSIDE(fr.distance, 15, 40 + 1)) break;
 		// only test 60 times
 		if (--i == 0) return;
+	}
 	if (!AiCheckIfRouteIsGood(p, &fr, 2)) return;
 	// Fill the source field
 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
 	p->ai.src.use_tile = 0;
 	p->ai.src.rand_rng = 9;
 	p->ai.src.cur_building_rule = 0xFF;
 	p->ai.src.buildcmd_a = 1;
 	p->ai.src.direction = 0;
 	p->ai.src.cargo = fr.cargo | 0x80;
 	// Fill the dest field
 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
 	p->ai.dst.use_tile = 0;
 	p->ai.dst.rand_rng = 9;
 	p->ai.dst.cur_building_rule = 0xFF;
 	p->ai.dst.buildcmd_a = 0xFF;
 	p->ai.dst.direction = 0;
 	p->ai.dst.cargo = fr.cargo;
 	// Fill common fields
 	p->ai.cargo_type = fr.cargo;
 	p->ai.num_build_rec = 2;
 	p->ai.num_loco_to_build = 3;
 	p->ai.num_want_fullload = 3;
 //	p->ai.loco_id = INVALID_VEHICLE;
 	p->ai.order_list_blocks[0] = 0;
 	p->ai.order_list_blocks[1] = 1;
 	p->ai.order_list_blocks[2] = 255;
 	p->ai.state = AIS_BUILD_DEFAULT_ROAD_BLOCKS;
 	p->ai.state_mode = -1;
 	p->ai.state_counter = 0;
 	p->ai.timeout_counter = 0;
+}
 static void AiWantLongRoadPassengerRoute(Player *p)
+{
 	int i;
 	FoundRoute fr;
 	i = 60;
 	for (;;) {
 		// look for one from the subsidy list
 		AiFindSubsidyPassengerRoute(&fr);
 		if (IS_INT_INSIDE(fr.distance, 55, 180 + 1)) break;
 		// try a random one
 		AiFindRandomPassengerRoute(&fr);
 		if (IS_INT_INSIDE(fr.distance, 55, 180 + 1)) break;
 		// only test 60 times
 		if (--i == 0) return;
+	}
 	fr.cargo = CT_PASSENGERS;
 	if (!AiCheckIfRouteIsGood(p, &fr, 2)) return;
 	// Fill the source field
 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
 	p->ai.src.use_tile = 0;
 	p->ai.src.rand_rng = 10;
 	p->ai.src.cur_building_rule = 0xFF;
 	p->ai.src.buildcmd_a = 1;
 	p->ai.src.direction = 0;
 	p->ai.src.cargo = CT_PASSENGERS;
 	// Fill the dest field
 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
 	p->ai.dst.use_tile = 0;
 	p->ai.dst.rand_rng = 10;
 	p->ai.dst.cur_building_rule = 0xFF;
 	p->ai.dst.buildcmd_a = 0xFF;
 	p->ai.dst.direction = 0;
 	p->ai.dst.cargo = CT_PASSENGERS;
 	// Fill common fields
 	p->ai.cargo_type = CT_PASSENGERS;
 	p->ai.num_build_rec = 2;
 	p->ai.num_loco_to_build = 4;
 	p->ai.num_want_fullload = 0;
 //	p->ai.loco_id = INVALID_VEHICLE;
 	p->ai.order_list_blocks[0] = 0;
 	p->ai.order_list_blocks[1] = 1;
 	p->ai.order_list_blocks[2] = 255;
 	p->ai.state = AIS_BUILD_DEFAULT_ROAD_BLOCKS;
 	p->ai.state_mode = -1;
 	p->ai.state_counter = 0;
 	p->ai.timeout_counter = 0;
+}
 static void AiWantPassengerRouteInsideTown(Player *p)
+{
 	int i;
 	FoundRoute fr;
 	Town *t;
 	i = 60;
 	for (;;) {
 		// Find a town big enough
 		t = AiFindRandomTown();
 		if (t != NULL && t->population >= 700) break;
 		// only test 60 times
 		if (--i == 0) return;
+	}
 	fr.cargo = CT_PASSENGERS;
 	fr.from = fr.to = t;
 	if (!AiCheckIfRouteIsGood(p, &fr, 2)) return;
 	// Fill the source field
 	p->ai.src.spec_tile = t->xy;
 	p->ai.src.use_tile = 0;
 	p->ai.src.rand_rng = 10;
 	p->ai.src.cur_building_rule = 0xFF;
 	p->ai.src.buildcmd_a = 1;
 	p->ai.src.direction = 0;
 	p->ai.src.cargo = CT_PASSENGERS;
 	// Fill the dest field
 	p->ai.dst.spec_tile = t->xy;
 	p->ai.dst.use_tile = 0;
 	p->ai.dst.rand_rng = 10;
 	p->ai.dst.cur_building_rule = 0xFF;
 	p->ai.dst.buildcmd_a = 0xFF;
 	p->ai.dst.direction = 0;
 	p->ai.dst.cargo = CT_PASSENGERS;
 	// Fill common fields
 	p->ai.cargo_type = CT_PASSENGERS;
 	p->ai.num_build_rec = 2;
 	p->ai.num_loco_to_build = 2;
 	p->ai.num_want_fullload = 0;
 //	p->ai.loco_id = INVALID_VEHICLE;
 	p->ai.order_list_blocks[0] = 0;
 	p->ai.order_list_blocks[1] = 1;
 	p->ai.order_list_blocks[2] = 255;
 	p->ai.state = AIS_BUILD_DEFAULT_ROAD_BLOCKS;
 	p->ai.state_mode = -1;
 	p->ai.state_counter = 0;
 	p->ai.timeout_counter = 0;
+}
 static void AiWantRoadRoute(Player *p)
+{
 	uint16 r = GB(Random(), 0, 16);
 	if (r > 0x4000) {
 		AiWantLongRoadIndustryRoute(p);
 	} else if (r > 0x2000) {
 		AiWantMediumRoadIndustryRoute(p);
 	} else if (r > 0x1000) {
 		AiWantLongRoadPassengerRoute(p);
 	} else {
 		AiWantPassengerRouteInsideTown(p);
+	}
+}
 static void AiWantPassengerAircraftRoute(Player *p)
+{
 	FoundRoute fr;
 	int i;
 	i = 60;
 	for (;;) {
 		// look for one from the subsidy list
 		AiFindSubsidyPassengerRoute(&fr);
 		if (IS_INT_INSIDE(fr.distance, 0, 95 + 1)) break;
 		// try a random one
 		AiFindRandomPassengerRoute(&fr);
 		if (IS_INT_INSIDE(fr.distance, 0, 95 + 1)) break;
 		// only test 60 times
 		if (--i == 0) return;
+	}
 	fr.cargo = CT_PASSENGERS;
 	if (!AiCheckIfRouteIsGood(p, &fr, 4)) return;
 	// Fill the source field
 	p->ai.src.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.to);
 	p->ai.src.use_tile = 0;
 	p->ai.src.rand_rng = 12;
 	p->ai.src.cur_building_rule = 0xFF;
 	p->ai.src.cargo = fr.cargo;
 	// Fill the dest field
 	p->ai.dst.spec_tile = GET_TOWN_OR_INDUSTRY_TILE(fr.from);
 	p->ai.dst.use_tile = 0;
 	p->ai.dst.rand_rng = 12;
 	p->ai.dst.cur_building_rule = 0xFF;
 	p->ai.dst.cargo = fr.cargo;
 	// Fill common fields
 	p->ai.cargo_type = fr.cargo;
 	p->ai.build_kind = 0;
 	p->ai.num_build_rec = 2;
 	p->ai.num_loco_to_build = 1;
 	p->ai.num_want_fullload = 1;
 //	p->ai.loco_id = INVALID_VEHICLE;
 	p->ai.order_list_blocks[0] = 0;
 	p->ai.order_list_blocks[1] = 1;
 	p->ai.order_list_blocks[2] = 255;
 	p->ai.state = AIS_AIRPORT_STUFF;
 	p->ai.timeout_counter = 0;
+}
 static void AiWantOilRigAircraftRoute(Player *p)
+{
 	int i;
 	FoundRoute fr;
 	Town *t;
 	Industry *in;
 	i = 60;
 	for (;;) {
 		// Find a town
 		t = AiFindRandomTown();
 		if (t != NULL) {
 			// Find a random oil rig industry
 			in = AiFindRandomIndustry();
 			if (in != NULL && in->type == IT_OIL_RIG) {
 				if (DistanceManhattan(t->xy, in->xy) < 60)
 					break;
+			}
+		}
 		// only test 60 times
 		if (--i == 0) return;
+	}
 	fr.cargo = CT_PASSENGERS;
 	fr.from = fr.to = t;
 	if (!AiCheckIfRouteIsGood(p, &fr, 4)) return;
 	// Fill the source field
 	p->ai.src.spec_tile = t->xy;
 	p->ai.src.use_tile = 0;
 	p->ai.src.rand_rng = 12;
 	p->ai.src.cur_building_rule = 0xFF;
 	p->ai.src.cargo = CT_PASSENGERS;
 	// Fill the dest field
 	p->ai.dst.spec_tile = in->xy;
 	p->ai.dst.use_tile = 0;
 	p->ai.dst.rand_rng = 5;
 	p->ai.dst.cur_building_rule = 0xFF;
 	p->ai.dst.cargo = CT_PASSENGERS;
 	// Fill common fields
 	p->ai.cargo_type = CT_PASSENGERS;
 	p->ai.build_kind = 1;
 	p->ai.num_build_rec = 2;
 	p->ai.num_loco_to_build = 1;
 	p->ai.num_want_fullload = 0;
 //	p->ai.loco_id = INVALID_VEHICLE;
 	p->ai.order_list_blocks[0] = 0;
 	p->ai.order_list_blocks[1] = 1;
 	p->ai.order_list_blocks[2] = 255;
 	p->ai.state = AIS_AIRPORT_STUFF;
 	p->ai.timeout_counter = 0;
+}
 static void AiWantAircraftRoute(Player *p)
+{
 	uint16 r = (uint16)Random();
 	if (r >= 0x2AAA || _date < 0x3912 + DAYS_TILL_ORIGINAL_BASE_YEAR) {
 		AiWantPassengerAircraftRoute(p);
 	} else {
 		AiWantOilRigAircraftRoute(p);
+	}
+}
 static void AiWantShipRoute(Player *p)
+{
 	// XXX
 //	error("AiWaitShipRoute");
+}
 static void AiStateWantNewRoute(Player *p)
+{
 	uint16 r;
 	int i;
 	if (p->player_money < AiGetBasePrice(p) * 500) {
 		p->ai.state = AIS_0;
 		return;
+	}
 	i = 200;
 	for (;;) {
 		r = (uint16)Random();
 		if (_patches.ai_disable_veh_train &&
 				_patches.ai_disable_veh_roadveh &&
 				_patches.ai_disable_veh_aircraft &&
 				_patches.ai_disable_veh_ship) {
 			return;
+		}
 		if (r < 0x7626) {
 			if (_patches.ai_disable_veh_train) continue;
 			AiWantTrainRoute(p);
 		} else if (r < 0xC4EA) {
 			if (_patches.ai_disable_veh_roadveh) continue;
 			AiWantRoadRoute(p);
 		} else if (r < 0xD89B) {
 			if (_patches.ai_disable_veh_aircraft) continue;
 			AiWantAircraftRoute(p);
 		} else {
 			if (_patches.ai_disable_veh_ship) continue;
 			AiWantShipRoute(p);
+		}
 		// got a route?
 		if (p->ai.state != AIS_WANT_NEW_ROUTE) break;
 		// time out?
 		if (--i == 0) {
 			if (++p->ai.state_counter == 556) p->ai.state = AIS_0;
 			break;
+		}
+	}
+}
 static bool AiCheckTrackResources(TileIndex tile, const AiDefaultBlockData *p, byte cargo)
+{
 	uint rad = (_patches.modified_catchment) ? CA_TRAIN : 4;
 	for (; p->mode != 4; p++) {
 		AcceptedCargo values;
 		TileIndex tile2;
 		uint w;
 		uint h;
 		if (p->mode != 1) continue;
 		tile2 = TILE_ADD(tile, ToTileIndexDiff(p->tileoffs));
 		w = GB(p->attr, 1, 3);
 		h = GB(p->attr, 4, 3);
 		if (p->attr & 1) uintswap(w, h);
 		if (cargo & 0x80) {
 			GetProductionAroundTiles(values, tile2, w, h, rad);
 			return values[cargo & 0x7F] != 0;
 		} else {
 			GetAcceptanceAroundTiles(values, tile2, w, h, rad);
 			if (!(values[cargo] & ~7))
 				return false;
 			if (cargo != CT_MAIL)
 				return true;
 			return !!((values[cargo]>>1) & ~7);
+		}
+	}
 	return true;
+}
 static int32 AiDoBuildDefaultRailTrack(TileIndex tile, const AiDefaultBlockData* p, RailType railtype, byte flag)
+{
 	int32 ret;
 	int32 total_cost = 0;
 	Town *t = NULL;
 	int rating = 0;
 	int i,j,k;
 	for (;;) {
 		// This will seldomly overflow for valid reasons. Mask it to be on the safe side.
 		uint c = TILE_MASK(tile + ToTileIndexDiff(p->tileoffs));
 		_cleared_town = NULL;
 		if (p->mode < 2) {
 			if (p->mode == 0) {
 				// Depot
 				ret = DoCommand(c, railtype, p->attr, flag | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, CMD_BUILD_TRAIN_DEPOT);
 			} else {
 				// Station
 				ret = DoCommand(c, (p->attr&1) | (p->attr>>4)<<8 | (p->attr>>1&7)<<16, railtype, flag | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, CMD_BUILD_RAILROAD_STATION);
+			}
 			if (CmdFailed(ret)) return CMD_ERROR;
 			total_cost += ret;
 clear_town_stuff:;
 			if (_cleared_town != NULL) {
 				if (t != NULL && t != _cleared_town)
 					return CMD_ERROR;
 				t = _cleared_town;
 				rating += _cleared_town_rating;
+			}
 		} else if (p->mode == 2) {
 			// Rail
 			if (IsTileType(c, MP_RAILWAY)) return CMD_ERROR;
 			j = p->attr;
 			k = 0;
 			// Build the rail
 			for (i = 0; i != 6; i++, j >>= 1) {
 				if (j&1) {
 					k = i;
 					ret = DoCommand(c, railtype, i, flag | DC_AUTO | DC_NO_WATER, CMD_BUILD_SINGLE_RAIL);
 					if (CmdFailed(ret)) return CMD_ERROR;
 					total_cost += ret;
+				}
+			}
 			/* signals too? */
 			if (j & 3) {
 				// Can't build signals on a road.
 				if (IsTileType(c, MP_STREET)) return CMD_ERROR;
 				if (flag & DC_EXEC) {
 					j = 4 - j;
 					do {
 						ret = DoCommand(c, k, 0, flag, CMD_BUILD_SIGNALS);
 					} while (--j);
 				} else {
 					ret = _price.build_signals;
+				}
 				if (CmdFailed(ret)) return CMD_ERROR;
 				total_cost += ret;
+			}
 		} else if (p->mode == 3) {
 			//Clear stuff and then build single rail.
 			if (GetTileSlope(c, NULL) != SLOPE_FLAT) return CMD_ERROR;
 			ret = DoCommand(c, 0, 0, flag | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, CMD_LANDSCAPE_CLEAR);
 			if (CmdFailed(ret)) return CMD_ERROR;
 			total_cost += ret + _price.build_rail;
 			if (flag & DC_EXEC) {
 				DoCommand(c, railtype, p->attr&1, flag | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, CMD_BUILD_SINGLE_RAIL);
+			}
 			goto clear_town_stuff;
 		} else {
 			// Unk
 			break;
+		}
 		p++;
+	}
 	if (!(flag & DC_EXEC)) {
 		if (t != NULL && rating > t->ratings[_current_player]) {
 			return CMD_ERROR;
+		}
+	}
 	return total_cost;
+}
 // Returns rule and cost
 static int AiBuildDefaultRailTrack(TileIndex tile, byte p0, byte p1, byte p2, byte p3, byte dir, byte cargo, RailType railtype, int32* cost)
+{
 	int i;
 	const AiDefaultRailBlock *p;
 	for (i = 0; (p = _default_rail_track_data[i]) != NULL; i++) {
 		if (p->p0 == p0 && p->p1 == p1 && p->p2 == p2 && p->p3 == p3 &&
 				(p->dir == 0xFF || p->dir == dir || ((p->dir - 1) & 3) == dir)) {
 			*cost = AiDoBuildDefaultRailTrack(tile, p->data, railtype, DC_NO_TOWN_RATING);
 			if (!CmdFailed(*cost) && AiCheckTrackResources(tile, p->data, cargo))
 				return i;
+		}
+	}
 	return -1;
+}
 static const byte _terraform_up_flags[] = {
 , 13, 12, 11,
 ,  9,  8,  7,
 ,  5,  4,  3,
 ,  1,  0,  1,
 ,  1,  4,  1,
 ,  1,  8,  1,
 ,  1,  4,  2,
 ,  1
 };
 static const byte _terraform_down_flags[] = {
 ,  2, 3,  4,
 ,  6, 1,  8,
 , 10, 8, 12,
 ,  2, 0,  0,
 ,  2, 3,  4,
 ,  6, 2,  8,
 , 10, 1, 12,
 ,  4
 };
 static void AiDoTerraformLand(TileIndex tile, int dir, int unk, int mode)
+{
 	PlayerID old_player;
 	uint32 r;
 	Slope slope;
 	uint h;
 	old_player = _current_player;
 	_current_player = OWNER_NONE;
 	r = Random();
 	unk &= (int)r;
 	do {
 		tile = TILE_MASK(tile + TileOffsByDiagDir(dir));
 		r >>= 2;
 		if (r & 2) {
 			dir++;
 			if (r & 1) dir -= 2;
+		}
 		dir &= 3;
 	} while (--unk >= 0);
 	slope = GetTileSlope(tile, &h);
 	if (slope != SLOPE_FLAT) {
 		if (mode > 0 || (mode == 0 && !(r & 0xC))) {
 			// Terraform up
 			DoCommand(tile, _terraform_up_flags[slope - 1], 1,
 				DC_EXEC | DC_AUTO | DC_NO_WATER, CMD_TERRAFORM_LAND);
 		} else if (h != 0) {
 			// Terraform down
 			DoCommand(tile, _terraform_down_flags[slope - 1], 0,
 				DC_EXEC | DC_AUTO | DC_NO_WATER, CMD_TERRAFORM_LAND);
+		}
+	}
 	_current_player = old_player;
+}
 static void AiStateBuildDefaultRailBlocks(Player *p)
+{
 	uint i;
 	int j;
 	AiBuildRec *aib;
 	int rule;
 	int32 cost;
 	// time out?
 	if (++p->ai.timeout_counter == 1388) {
 		p->ai.state = AIS_DELETE_RAIL_BLOCKS;
 		return;
+	}
 	// do the following 8 times
 	for (i = 0; i < 8; i++) {
 		// check if we can build the default track
 		aib = &p->ai.src;
 		j = p->ai.num_build_rec;
 		do {
 			// this item has already been built?
 			if (aib->cur_building_rule != 255) continue;
 			// adjust the coordinate randomly,
 			// to make sure that we find a position.
 			aib->use_tile = AdjustTileCoordRandomly(aib->spec_tile, aib->rand_rng);
 			// check if the track can be build there.
 			rule = AiBuildDefaultRailTrack(aib->use_tile,
 				p->ai.build_kind, p->ai.num_wagons,
 				aib->unk6, aib->unk7,
 				aib->direction, aib->cargo,
 				p->ai.railtype_to_use,
 				&cost
 			);
 			if (rule == -1) {
 				// cannot build, terraform after a while
 				if (p->ai.state_counter >= 600) {
 					AiDoTerraformLand(aib->use_tile, Random()&3, 3, (int8)p->ai.state_mode);
+				}
 				// also try the other terraform direction
 				if (++p->ai.state_counter >= 1000) {
 					p->ai.state_counter = 0;
 					p->ai.state_mode = -p->ai.state_mode;
+				}
 			} else if (CheckPlayerHasMoney(cost)) {
 				int32 r;
 				// player has money, build it.
 				aib->cur_building_rule = rule;
 				r = AiDoBuildDefaultRailTrack(
 					aib->use_tile,
 					_default_rail_track_data[rule]->data,
 					p->ai.railtype_to_use,
 					DC_EXEC | DC_NO_TOWN_RATING
 				);
 				assert(!CmdFailed(r));
+			}
 		} while (++aib,--j);
+	}
 	// check if we're done with all of them
 	aib = &p->ai.src;
 	j = p->ai.num_build_rec;
 	do {
 		if (aib->cur_building_rule == 255) return;
 	} while (++aib,--j);
 	// yep, all are done. switch state to the rail building state.
 	p->ai.state = AIS_BUILD_RAIL;
 	p->ai.state_mode = 255;
+}
 static TileIndex AiGetEdgeOfDefaultRailBlock(byte rule, TileIndex tile, byte cmd, int *dir)
+{
 	const AiDefaultBlockData *p = _default_rail_track_data[rule]->data;
 	while (p->mode != 3 || !((--cmd) & 0x80)) p++;
 	return tile + ToTileIndexDiff(p->tileoffs) - TileOffsByDiagDir(*dir = p->attr);
+}
 typedef struct AiRailPathFindData {
 	TileIndex tile;
 	TileIndex tile2;
 	int count;
 	bool flag;
 } AiRailPathFindData;
 static bool AiEnumFollowTrack(TileIndex tile, AiRailPathFindData *a, int track, uint length, byte *state)
+{
 	if (a->flag) return true;
 	if (length > 20 || tile == a->tile) {
 		a->flag = true;
 		return true;
+	}
 	if (DistanceMax(tile, a->tile2) < 4) a->count++;
 	return false;
+}
 static bool AiDoFollowTrack(const Player* p)
+{
 	AiRailPathFindData arpfd;
 	arpfd.tile = p->ai.start_tile_a;
 	arpfd.tile2 = p->ai.cur_tile_a;
 	arpfd.flag = false;
 	arpfd.count = 0;
 	FollowTrack(p->ai.cur_tile_a + TileOffsByDiagDir(p->ai.cur_dir_a), 0x2000 | TRANSPORT_RAIL, p->ai.cur_dir_a^2,
 		(TPFEnumProc*)AiEnumFollowTrack, NULL, &arpfd);
 	return arpfd.count > 8;
+}
 typedef struct AiRailFinder {
 	TileIndex final_tile;
 	byte final_dir;
 	byte depth;
 	byte recursive_mode;
 	byte cur_best_dir;
 	byte best_dir;
 	byte cur_best_depth;
 	byte best_depth;
 	uint cur_best_dist;
 	const byte *best_ptr;
 	uint best_dist;
 	TileIndex cur_best_tile, best_tile;
 	TileIndex bridge_end_tile;
 	Player *player;
 } AiRailFinder;
 static const byte _ai_table_15[4][8] = {
 	{0, 0, 4, 3, 3, 1, 128 + 0, 64},
 	{1, 1, 2, 0, 4, 2, 128 + 1, 65},
 	{0, 2, 2, 3, 5, 1, 128 + 2, 66},
 	{1, 3, 5, 0, 3, 2, 128 + 3, 67}
 };
 static const byte _dir_table_1[] = { 3, 9, 12, 6};
 static const byte _dir_table_2[] = {12, 6,  3, 9};
 static bool AiIsTileBanned(const Player* p, TileIndex tile, byte val)
+{
 	int i;
 	for (i = 0; i != p->ai.banned_tile_count; i++) {
 		if (p->ai.banned_tiles[i] == tile && p->ai.banned_val[i] == val) {
 			return true;
+		}
+	}
 	return false;
+}
 static void AiBanTile(Player* p, TileIndex tile, byte val)
+{
 	uint i;
 	for (i = lengthof(p->ai.banned_tiles) - 1; i != 0; i--) {
 		p->ai.banned_tiles[i] = p->ai.banned_tiles[i - 1];
 		p->ai.banned_val[i] = p->ai.banned_val[i - 1];
+	}
 	p->ai.banned_tiles[0] = tile;
 	p->ai.banned_val[0] = val;
 	if (p->ai.banned_tile_count != lengthof(p->ai.banned_tiles)) {
 		p->ai.banned_tile_count++;
+	}
+}
 static void AiBuildRailRecursive(AiRailFinder *arf, TileIndex tile, int dir);
 static bool AiCheckRailPathBetter(AiRailFinder *arf, const byte *p)
+{
 	bool better = false;
 	if (arf->recursive_mode < 1) {
 		// Mode is 0. This means destination has not been found yet.
 		// If the found path is shorter than the current one, remember it.
 		if (arf->cur_best_dist < arf->best_dist) {
 			arf->best_dir = arf->cur_best_dir;
 			arf->best_dist = arf->cur_best_dist;
 			arf->best_ptr = p;
 			arf->best_tile = arf->cur_best_tile;
 			better = true;
+		}
 	} else if (arf->recursive_mode > 1) {
 		// Mode is 2.
 		if (arf->best_dist != 0 || arf->cur_best_depth < arf->best_depth) {
 			arf->best_depth = arf->cur_best_depth;
 			arf->best_dist = 0;
 			arf->best_ptr = p;
 			arf->best_tile = 0;
 			better = true;
+		}
+	}
 	arf->recursive_mode = 0;
 	arf->cur_best_dist = (uint)-1;
 	arf->cur_best_depth = 0xff;
 	return better;
+}
 static inline void AiCheckBuildRailBridgeHere(AiRailFinder *arf, TileIndex tile, const byte *p)
+{
 	Slope tileh;
 	uint z;
 	bool flag;
 	int dir2 = p[0] & 3;
 	tileh = GetTileSlope(tile, &z);
 	if (tileh == _dir_table_1[dir2] || (tileh == SLOPE_FLAT && z != 0)) {
 		TileIndex tile_new = tile;
 		// Allow bridges directly over bottom tiles
 		flag = z == 0;
 		for (;;) {
 			TileType type;
 			if ((TileIndexDiff)tile_new < -TileOffsByDiagDir(dir2)) return; // Wraping around map, no bridge possible!
 			tile_new = TILE_MASK(tile_new + TileOffsByDiagDir(dir2));
 			type = GetTileType(tile_new);
 			if (type == MP_CLEAR || type == MP_TREES || GetTileSlope(tile_new, NULL) != SLOPE_FLAT) {
 				if (!flag) return;
 				break;
+			}
 			if (type != MP_WATER && type != MP_RAILWAY && type != MP_STREET) return;
 			flag = true;
+		}
 		// Is building a (rail)bridge possible at this place (type doesn't matter)?
 		if (CmdFailed(DoCommand(tile_new, tile, 0 | arf->player->ai.railtype_to_use << 8, DC_AUTO, CMD_BUILD_BRIDGE))) {
 			return;
+		}
 		AiBuildRailRecursive(arf, tile_new, dir2);
 		// At the bottom depth, check if the new path is better than the old one.
 		if (arf->depth == 1) {
 			if (AiCheckRailPathBetter(arf, p)) arf->bridge_end_tile = tile_new;
+		}
+	}
+}
 static inline void AiCheckBuildRailTunnelHere(AiRailFinder *arf, TileIndex tile, const byte *p)
+{
 	uint z;
 	if (GetTileSlope(tile, &z) == _dir_table_2[p[0] & 3] && z != 0) {
 		int32 cost = DoCommand(tile, arf->player->ai.railtype_to_use, 0, DC_AUTO, CMD_BUILD_TUNNEL);
 		if (!CmdFailed(cost) && cost <= (arf->player->player_money>>4)) {
 			AiBuildRailRecursive(arf, _build_tunnel_endtile, p[0]&3);
 			if (arf->depth == 1) AiCheckRailPathBetter(arf, p);
+		}
+	}
+}
 static void AiBuildRailRecursive(AiRailFinder *arf, TileIndex tile, int dir)
+{
 	const byte *p;
 	tile = TILE_MASK(tile + TileOffsByDiagDir(dir));
 	// Reached destination?
 	if (tile == arf->final_tile) {
 		if (arf->final_dir != (dir^2)) {
 			if (arf->recursive_mode != 2) arf->recursive_mode = 1;
 		} else if (arf->recursive_mode != 2) {
 			arf->recursive_mode = 2;
 			arf->cur_best_depth = arf->depth;
 		} else {
 			if (arf->depth < arf->cur_best_depth) arf->cur_best_depth = arf->depth;
+		}
 		return;
+	}
 	// Depth too deep?
 	if (arf->depth >= 4) {
 		uint dist = DistanceMaxPlusManhattan(tile, arf->final_tile);
 		if (dist < arf->cur_best_dist) {
 			// Store the tile that is closest to the final position.
 			arf->cur_best_depth = arf->depth;
 			arf->cur_best_dist = dist;
 			arf->cur_best_tile = tile;
 			arf->cur_best_dir = dir;
+		}
 		return;
+	}
 	// Increase recursion depth
 	arf->depth++;
 	// Grab pointer to list of stuff that is possible to build
 	p = _ai_table_15[dir];
 	// Try to build a single rail in all directions.
 	if (GetTileZ(tile) == 0) {
 		p += 6;
 	} else {
 		do {
 			// Make sure the tile is not in the list of banned tiles and that a rail can be built here.
 			if (!AiIsTileBanned(arf->player, tile, p[0]) &&
 					!CmdFailed(DoCommand(tile, arf->player->ai.railtype_to_use, p[0], DC_AUTO | DC_NO_WATER | DC_NO_RAIL_OVERLAP, CMD_BUILD_SINGLE_RAIL))) {
 				AiBuildRailRecursive(arf, tile, p[1]);
+			}
 			// At the bottom depth?
 			if (arf->depth == 1) AiCheckRailPathBetter(arf, p);
 			p += 2;
 		} while (!(p[0]&0x80));
+	}
 	AiCheckBuildRailBridgeHere(arf, tile, p);
 	AiCheckBuildRailTunnelHere(arf, tile, p+1);
 	arf->depth--;
+}
 static const byte _dir_table_3[]= {0x25, 0x2A, 0x19, 0x16};
 static void AiBuildRailConstruct(Player *p)
+{
 	AiRailFinder arf;
 	int i;
 	// Check too much lookahead?
 	if (AiDoFollowTrack(p)) {
 		p->ai.state_counter = (Random()&0xE)+6; // Destruct this amount of blocks
 		p->ai.state_mode = 1; // Start destruct
 		// Ban this tile and don't reach it for a while.
 		AiBanTile(p, p->ai.cur_tile_a, FindFirstBit(GetRailTrackStatus(p->ai.cur_tile_a)));
 		return;
+	}
 	// Setup recursive finder and call it.
 	arf.player = p;
 	arf.final_tile = p->ai.cur_tile_b;
 	arf.final_dir = p->ai.cur_dir_b;
 	arf.depth = 0;
 	arf.recursive_mode = 0;
 	arf.best_ptr = NULL;
 	arf.cur_best_dist = (uint)-1;
 	arf.cur_best_depth = 0xff;
 	arf.best_dist = (uint)-1;
 	arf.best_depth = 0xff;
 	arf.cur_best_tile = 0;
 	arf.best_tile = 0;
 	AiBuildRailRecursive(&arf, p->ai.cur_tile_a, p->ai.cur_dir_a);
 	// Reached destination?
 	if (arf.recursive_mode == 2 && arf.cur_best_depth == 0) {
 		p->ai.state_mode = 255;
 		return;
+	}
 	// Didn't find anything to build?
 	if (arf.best_ptr == NULL) {
 		// Terraform some
 		for (i = 0; i != 5; i++) {
 			AiDoTerraformLand(p->ai.cur_tile_a, p->ai.cur_dir_a, 3, 0);
+		}
 		if (++p->ai.state_counter == 21) {
 			p->ai.state_counter = 40;
 			p->ai.state_mode = 1;
 			// Ban this tile
 			AiBanTile(p, p->ai.cur_tile_a, FindFirstBit(GetRailTrackStatus(p->ai.cur_tile_a)));
+		}
 		return;
+	}
 	p->ai.cur_tile_a += TileOffsByDiagDir(p->ai.cur_dir_a);
 	if (arf.best_ptr[0] & 0x80) {
 		int i;
 		int32 bridge_len = GetBridgeLength(arf.bridge_end_tile, p->ai.cur_tile_a);
 		/* Figure out which (rail)bridge type to build
 		 * start with best bridge, then go down to worse and worse bridges
 		 * unnecessary to check for worst bridge (i=0), since AI will always build
 		 * that. AI is so fucked up that fixing this small thing will probably not
 		 * solve a thing
 		 */
 		for (i = MAX_BRIDGES - 1; i != 0; i--) {
 			if (CheckBridge_Stuff(i, bridge_len)) {
 				int32 cost = DoCommand(arf.bridge_end_tile, p->ai.cur_tile_a, i | (p->ai.railtype_to_use << 8), DC_AUTO, CMD_BUILD_BRIDGE);
 				if (!CmdFailed(cost) && cost < (p->player_money >> 5)) break;
+			}
+		}
 		// Build it
 		DoCommand(arf.bridge_end_tile, p->ai.cur_tile_a, i | (p->ai.railtype_to_use << 8), DC_AUTO | DC_EXEC, CMD_BUILD_BRIDGE);
 		p->ai.cur_tile_a = arf.bridge_end_tile;
 		p->ai.state_counter = 0;
 	} else if (arf.best_ptr[0] & 0x40) {
 		// tunnel
 		DoCommand(p->ai.cur_tile_a, p->ai.railtype_to_use, 0, DC_AUTO | DC_EXEC, CMD_BUILD_TUNNEL);
 		p->ai.cur_tile_a = _build_tunnel_endtile;
 		p->ai.state_counter = 0;
 	} else {
 		// rail
 		p->ai.cur_dir_a = arf.best_ptr[1];
 		DoCommand(p->ai.cur_tile_a, p->ai.railtype_to_use, arf.best_ptr[0],
 			DC_EXEC | DC_AUTO | DC_NO_WATER | DC_NO_RAIL_OVERLAP, CMD_BUILD_SINGLE_RAIL);
 		p->ai.state_counter = 0;
+	}
 	if (arf.best_tile != 0) {
 		for (i = 0; i != 2; i++) {
 			AiDoTerraformLand(arf.best_tile, arf.best_dir, 3, 0);
+		}
+	}
+}
 static bool AiRemoveTileAndGoForward(Player *p)
+{
 	byte b;
 	int bit;
 	const byte *ptr;
 	TileIndex tile = p->ai.cur_tile_a;
 	TileIndex tilenew;
 	if (IsTileType(tile, MP_TUNNELBRIDGE)) {
 		if (IsTunnel(tile)) {
 			// Clear the tunnel and continue at the other side of it.
 			if (CmdFailed(DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR)))
 				return false;
 			p->ai.cur_tile_a = TILE_MASK(_build_tunnel_endtile - TileOffsByDiagDir(p->ai.cur_dir_a));
 			return true;
 		} else {
 			// Check if the bridge points in the right direction.
 			// This is not really needed the first place AiRemoveTileAndGoForward is called.
 			if (DiagDirToAxis(GetBridgeRampDirection(tile)) != (p->ai.cur_dir_a & 1U)) return false;
 			tile = GetOtherBridgeEnd(tile);
 			tilenew = TILE_MASK(tile - TileOffsByDiagDir(p->ai.cur_dir_a));
 			// And clear the bridge.
 			if (CmdFailed(DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR)))
 				return false;
 			p->ai.cur_tile_a = tilenew;
 			return true;
+		}
+	}
 	// Find the railtype at the position. Quit if no rail there.
 	b = GetRailTrackStatus(tile) & _dir_table_3[p->ai.cur_dir_a];
 	if (b == 0) return false;
 	// Convert into a bit position that CMD_REMOVE_SINGLE_RAIL expects.
 	bit = FindFirstBit(b);
 	// Then remove and signals if there are any.
 	if (IsTileType(tile, MP_RAILWAY) &&
 			GetRailTileType(tile) == RAIL_TILE_SIGNALS) {
 		DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_SIGNALS);
+	}
 	// And also remove the rail.
 	if (CmdFailed(DoCommand(tile, 0, bit, DC_EXEC, CMD_REMOVE_SINGLE_RAIL)))
 		return false;
 	// Find the direction at the other edge of the rail.
 	ptr = _ai_table_15[p->ai.cur_dir_a ^ 2];
 	while (ptr[0] != bit) ptr += 2;
 	p->ai.cur_dir_a = ptr[1] ^ 2;
 	// And then also switch tile.
 	p->ai.cur_tile_a = TILE_MASK(p->ai.cur_tile_a - TileOffsByDiagDir(p->ai.cur_dir_a));
 	return true;
+}
 static void AiBuildRailDestruct(Player *p)
+{
 	// Decrease timeout.
 	if (!--p->ai.state_counter) {
 		p->ai.state_mode = 2;
 		p->ai.state_counter = 0;
+	}
 	// Don't do anything if the destination is already reached.
 	if (p->ai.cur_tile_a == p->ai.start_tile_a) return;
 	AiRemoveTileAndGoForward(p);
+}
 static void AiBuildRail(Player *p)
+{
 	switch (p->ai.state_mode) {
 		case 0: // Construct mode, build new rail.
 			AiBuildRailConstruct(p);
 			break;
 		case 1: // Destruct mode, destroy the rail currently built.
 			AiBuildRailDestruct(p);
 			break;
 		case 2: {
 			uint i;
 			// Terraform some and then try building again.
 			for (i = 0; i != 4; i++) {
 				AiDoTerraformLand(p->ai.cur_tile_a, p->ai.cur_dir_a, 3, 0);
+			}
 			if (++p->ai.state_counter == 4) {
 				p->ai.state_counter = 0;
 				p->ai.state_mode = 0;
+			}
+		}
 		default: break;
+	}
+}
 static void AiStateBuildRail(Player *p)
+{
 	int num;
 	AiBuildRec *aib;
 	byte cmd;
 	TileIndex tile;
 	int dir;
 	// time out?
 	if (++p->ai.timeout_counter == 1388) {
 		p->ai.state = AIS_DELETE_RAIL_BLOCKS;
 		return;
+	}
 	// Currently building a rail between two points?
 	if (p->ai.state_mode != 255) {
 		AiBuildRail(p);
 		// Alternate between edges
 		swap_tile(&p->ai.start_tile_a, &p->ai.start_tile_b);
 		swap_tile(&p->ai.cur_tile_a, &p->ai.cur_tile_b);
 		swap_byte(&p->ai.start_dir_a, &p->ai.start_dir_b);
 		swap_byte(&p->ai.cur_dir_a, &p->ai.cur_dir_b);
 		return;
+	}
 	// Now, find two new points to build between
 	num = p->ai.num_build_rec;
 	aib = &p->ai.src;
 	for (;;) {
 		cmd = aib->buildcmd_a;
 		aib->buildcmd_a = 255;
 		if (cmd != 255) break;
 		cmd = aib->buildcmd_b;
 		aib->buildcmd_b = 255;
 		if (cmd != 255) break;
 		aib++;
 		if (--num == 0) {
 			p->ai.state = AIS_BUILD_RAIL_VEH;
 			p->ai.state_counter = 0; // timeout
 			return;
+		}
+	}
 	// Find first edge to build from.
 	tile = AiGetEdgeOfDefaultRailBlock(aib->cur_building_rule, aib->use_tile, cmd&3, &dir);
 	p->ai.start_tile_a = tile;
 	p->ai.cur_tile_a = tile;
 	p->ai.start_dir_a = dir;
 	p->ai.cur_dir_a = dir;
 	DoCommand(TILE_MASK(tile + TileOffsByDiagDir(dir)), 0, (dir&1)?1:0, DC_EXEC, CMD_REMOVE_SINGLE_RAIL);
 	assert(TILE_MASK(tile) != 0xFF00);
 	// Find second edge to build to
 	aib = (&p->ai.src) + ((cmd >> 4)&0xF);
 	tile = AiGetEdgeOfDefaultRailBlock(aib->cur_building_rule, aib->use_tile, (cmd>>2)&3, &dir);
 	p->ai.start_tile_b = tile;
 	p->ai.cur_tile_b = tile;
 	p->ai.start_dir_b = dir;
 	p->ai.cur_dir_b = dir;
 	DoCommand(TILE_MASK(tile + TileOffsByDiagDir(dir)), 0, (dir&1)?1:0, DC_EXEC, CMD_REMOVE_SINGLE_RAIL);
 	assert(TILE_MASK(tile) != 0xFF00);
 	// And setup state.
 	p->ai.state_mode = 2;
 	p->ai.state_counter = 0;
 	p->ai.banned_tile_count = 0;
+}
 static StationID AiGetStationIdByDef(TileIndex tile, int id)
+{
 	const AiDefaultBlockData *p = _default_rail_track_data[id]->data;
 	while (p->mode != 1) p++;
 	return GetStationIndex(TILE_ADD(tile, ToTileIndexDiff(p->tileoffs)));
+}
 static EngineID AiFindBestWagon(CargoID cargo, RailType railtype)
+{
 	EngineID best_veh_index = INVALID_ENGINE;
 	EngineID i;
 	uint16 best_capacity = 0;
 	uint16 best_speed    = 0;
 	uint speed;
 	for (i = 0; i < NUM_TRAIN_ENGINES; i++) {
 		const RailVehicleInfo *rvi = RailVehInfo(i);
 		const Engine* e = GetEngine(i);
 		if (!IsCompatibleRail(e->railtype, railtype) ||
 				!(rvi->flags & RVI_WAGON) ||
 				!HASBIT(e->player_avail, _current_player)) {
 			continue;
+		}
 		if (rvi->cargo_type != cargo) continue;
 		/* max_speed of 0 indicates no speed limit */
 		speed = rvi->max_speed == 0 ? 0xFFFF : rvi->max_speed;
 		if (rvi->capacity >= best_capacity && speed >= best_speed) {
 			best_capacity = rvi->capacity;
 			best_speed    = best_speed;
 			best_veh_index = i;
+		}
+	}
 	return best_veh_index;
+}
 static void AiStateBuildRailVeh(Player *p)
+{
 	const AiDefaultBlockData *ptr;
 	TileIndex tile;
 	EngineID veh;
 	int i;
 	CargoID cargo;
 	int32 cost;
 	Vehicle *v;
 	VehicleID loco_id;
 	ptr = _default_rail_track_data[p->ai.src.cur_building_rule]->data;
 	while (ptr->mode != 0) ptr++;
 	tile = TILE_ADD(p->ai.src.use_tile, ToTileIndexDiff(ptr->tileoffs));
 	cargo = p->ai.cargo_type;
 	for (i = 0;;) {
 		if (p->ai.wagon_list[i] == INVALID_VEHICLE) {
 			veh = AiFindBestWagon(cargo, p->ai.railtype_to_use);
 			/* veh will return INVALID_ENGINE if no suitable wagon is available.
 			 * We shall treat this in the same way as having no money */
 			if (veh == INVALID_ENGINE) goto handle_nocash;
 			cost = DoCommand(tile, veh, 0, DC_EXEC, CMD_BUILD_RAIL_VEHICLE);
 			if (CmdFailed(cost)) goto handle_nocash;
 			p->ai.wagon_list[i] = _new_vehicle_id;
 			p->ai.wagon_list[i + 1] = INVALID_VEHICLE;
 			return;
+		}
 		if (cargo == CT_MAIL) cargo = CT_PASSENGERS;
 		if (++i == p->ai.num_wagons * 2 - 1) break;
+	}
 	// Which locomotive to build?
 	veh = AiChooseTrainToBuild(p->ai.railtype_to_use, p->player_money, cargo != CT_PASSENGERS ? 1 : 0, tile);
 	if (veh == INVALID_ENGINE) {
 handle_nocash:
 		// after a while, if AI still doesn't have cash, get out of this block by selling the wagons.
 		if (++p->ai.state_counter == 1000) {
 			for (i = 0; p->ai.wagon_list[i] != INVALID_VEHICLE; i++) {
 				cost = DoCommand(tile, p->ai.wagon_list[i], 0, DC_EXEC, CMD_SELL_RAIL_WAGON);
 				assert(!CmdFailed(cost));
+			}
 			p->ai.state = AIS_0;
+		}
 		return;
+	}
 	// Try to build the locomotive
 	cost = DoCommand(tile, veh, 0, DC_EXEC, CMD_BUILD_RAIL_VEHICLE);
 	assert(!CmdFailed(cost));
 	loco_id = _new_vehicle_id;
 	// Sell a vehicle if the train is double headed.
 	v = GetVehicle(loco_id);
 	if (v->next != NULL) {
 		i = p->ai.wagon_list[p->ai.num_wagons * 2 - 2];
 		p->ai.wagon_list[p->ai.num_wagons * 2 - 2] = INVALID_VEHICLE;
 		DoCommand(tile, i, 0, DC_EXEC, CMD_SELL_RAIL_WAGON);
+	}
 	// Move the wagons onto the train
 	for (i = 0; p->ai.wagon_list[i] != INVALID_VEHICLE; i++) {
 		DoCommand(tile, p->ai.wagon_list[i] | (loco_id << 16), 0, DC_EXEC, CMD_MOVE_RAIL_VEHICLE);
+	}
 	for (i = 0; p->ai.order_list_blocks[i] != 0xFF; i++) {
 		const AiBuildRec* aib = &p->ai.src + p->ai.order_list_blocks[i];
 		bool is_pass = (
 			p->ai.cargo_type == CT_PASSENGERS ||
 			p->ai.cargo_type == CT_MAIL ||
 			(_opt.landscape == LT_NORMAL && p->ai.cargo_type == CT_VALUABLES)
 		);
 		Order order;
 		order.type = OT_GOTO_STATION;
 		order.flags = 0;
 		order.dest = AiGetStationIdByDef(aib->use_tile, aib->cur_building_rule);
 		if (!is_pass && i == 1) order.flags |= OF_UNLOAD;
 		if (p->ai.num_want_fullload != 0 && (is_pass || i == 0))
 			order.flags |= OF_FULL_LOAD;
 		DoCommand(0, loco_id + (i << 16), PackOrder(&order), DC_EXEC, CMD_INSERT_ORDER);
+	}
 	DoCommand(0, loco_id, 0, DC_EXEC, CMD_START_STOP_TRAIN);
 	DoCommand(0, loco_id, _ai_service_interval, DC_EXEC, CMD_CHANGE_SERVICE_INT);
 	if (p->ai.num_want_fullload != 0) p->ai.num_want_fullload--;
 	if (--p->ai.num_loco_to_build != 0) {
 //		p->ai.loco_id = INVALID_VEHICLE;
 		p->ai.wagon_list[0] = INVALID_VEHICLE;
 	} else {
 		p->ai.state = AIS_0;
+	}
+}
 static void AiStateDeleteRailBlocks(Player *p)
+{
 	const AiBuildRec* aib = &p->ai.src;
 	uint num = p->ai.num_build_rec;
 	do {
 		const AiDefaultBlockData* b;
 		if (aib->cur_building_rule == 255) continue;
 		for (b = _default_rail_track_data[aib->cur_building_rule]->data; b->mode != 4; b++) {
 			DoCommand(TILE_ADD(aib->use_tile, ToTileIndexDiff(b->tileoffs)), 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
+		}
 	} while (++aib,--num);
 	p->ai.state = AIS_0;
+}
 static bool AiCheckRoadResources(TileIndex tile, const AiDefaultBlockData *p, byte cargo)
+{
 	uint values[NUM_CARGO];
 	int rad;
 	if (_patches.modified_catchment) {
 		rad = CA_TRUCK; // Same as CA_BUS at the moment?
 	} else { // change that at some point?
 		rad = 4;
+	}
 	for (;; p++) {
 		if (p->mode == 4) {
 			return true;
 		} else if (p->mode == 1) {
 			TileIndex tile2 = TILE_ADD(tile, ToTileIndexDiff(p->tileoffs));
 			if (cargo & 0x80) {
 				GetProductionAroundTiles(values, tile2, 1, 1, rad);
 				return values[cargo & 0x7F] != 0;
 			} else {
 				GetAcceptanceAroundTiles(values, tile2, 1, 1, rad);
 				return (values[cargo]&~7) != 0;
+			}
+		}
+	}
+}
 static bool _want_road_truck_station;
 static int32 AiDoBuildDefaultRoadBlock(TileIndex tile, const AiDefaultBlockData *p, byte flag);
 // Returns rule and cost
 static int AiFindBestDefaultRoadBlock(TileIndex tile, byte direction, byte cargo, int32 *cost)
+{
 	int i;
 	const AiDefaultRoadBlock *p;
 	_want_road_truck_station = (cargo & 0x7F) != CT_PASSENGERS;
 	for (i = 0; (p = _road_default_block_data[i]) != NULL; i++) {
 		if (p->dir == direction) {
 			*cost = AiDoBuildDefaultRoadBlock(tile, p->data, 0);
 			if (!CmdFailed(*cost) && AiCheckRoadResources(tile, p->data, cargo))
 				return i;
+		}
+	}
 	return -1;
+}
 static int32 AiDoBuildDefaultRoadBlock(TileIndex tile, const AiDefaultBlockData *p, byte flag)
+{
 	int32 ret;
 	int32 total_cost = 0;
 	Town *t = NULL;
 	int rating = 0;
 	int roadflag = 0;
 	for (;p->mode != 4;p++) {
 		TileIndex c = TILE_MASK(tile + ToTileIndexDiff(p->tileoffs));
 		_cleared_town = NULL;
 		if (p->mode == 2) {
 			if (IsTileType(c, MP_STREET) &&
 					GetRoadTileType(c) == ROAD_TILE_NORMAL &&
 					(GetRoadBits(c) & p->attr) != 0) {
 				roadflag |= 2;
 				// all bits are already built?
 				if ((GetRoadBits(c) & p->attr) == p->attr) continue;
+			}
 			ret = DoCommand(c, p->attr, 0, flag | DC_AUTO | DC_NO_WATER, CMD_BUILD_ROAD);
 			if (CmdFailed(ret)) return CMD_ERROR;
 			total_cost += ret;
 			continue;
+		}
 		if (p->mode == 0) {
 			// Depot
 			ret = DoCommand(c, p->attr, 0, flag | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, CMD_BUILD_ROAD_DEPOT);
 			goto clear_town_stuff;
 		} else if (p->mode == 1) {
 			if (_want_road_truck_station) {
 				// Truck station
 				ret = DoCommand(c, p->attr, RS_TRUCK, flag | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, CMD_BUILD_ROAD_STOP);
 			} else {
 				// Bus station
 				ret = DoCommand(c, p->attr, RS_BUS, flag | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, CMD_BUILD_ROAD_STOP);
+			}
 clear_town_stuff:;
 			if (CmdFailed(ret)) return CMD_ERROR;
 			total_cost += ret;
 			if (_cleared_town != NULL) {
 				if (t != NULL && t != _cleared_town) return CMD_ERROR;
 				t = _cleared_town;
 				rating += _cleared_town_rating;
+			}
 		} else if (p->mode == 3) {
 			if (flag & DC_EXEC) continue;
 			if (GetTileSlope(c, NULL) != SLOPE_FLAT) return CMD_ERROR;
 			if (!IsTileType(c, MP_STREET) || GetRoadTileType(c) != ROAD_TILE_NORMAL) {
 				ret = DoCommand(c, 0, 0, flag | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, CMD_LANDSCAPE_CLEAR);
 				if (CmdFailed(ret)) return CMD_ERROR;
+			}
+		}
+	}
 	if (!_want_road_truck_station && !(roadflag & 2)) return CMD_ERROR;
 	if (!(flag & DC_EXEC)) {
 		if (t != NULL && rating > t->ratings[_current_player]) return CMD_ERROR;
+	}
 	return total_cost;
+}
 // Make sure the blocks are not too close to each other
 static bool AiCheckBlockDistances(Player *p, TileIndex tile)
+{
 	const AiBuildRec* aib = &p->ai.src;
 	uint num = p->ai.num_build_rec;
 	do {
 		if (aib->cur_building_rule != 255) {
 			if (DistanceManhattan(aib->use_tile, tile) < 9) return false;
+		}
 	} while (++aib, --num);
 	return true;
+}
 static void AiStateBuildDefaultRoadBlocks(Player *p)
+{
 	uint i;
 	int j;
 	AiBuildRec *aib;
 	int rule;
 	int32 cost;
 	// time out?
 	if (++p->ai.timeout_counter == 1388) {
 		p->ai.state = AIS_DELETE_RAIL_BLOCKS;
 		return;
+	}
 	// do the following 8 times
 	for (i = 0; i != 8; i++) {
 		// check if we can build the default track
 		aib = &p->ai.src;
 		j = p->ai.num_build_rec;
 		do {
 			// this item has already been built?
 			if (aib->cur_building_rule != 255) continue;
 			// adjust the coordinate randomly,
 			// to make sure that we find a position.
 			aib->use_tile = AdjustTileCoordRandomly(aib->spec_tile, aib->rand_rng);
 			// check if the road can be built there.
 			rule = AiFindBestDefaultRoadBlock(
 				aib->use_tile, aib->direction, aib->cargo, &cost
 			);
 			if (rule == -1) {
 				// cannot build, terraform after a while
 				if (p->ai.state_counter >= 600) {
 					AiDoTerraformLand(aib->use_tile, Random()&3, 3, (int8)p->ai.state_mode);
+				}
 				// also try the other terraform direction
 				if (++p->ai.state_counter >= 1000) {
 					p->ai.state_counter = 0;
 					p->ai.state_mode = -p->ai.state_mode;
+				}
 			} else if (CheckPlayerHasMoney(cost) && AiCheckBlockDistances(p,aib->use_tile)) {
 				int32 r;
 				// player has money, build it.
 				aib->cur_building_rule = rule;
 				r = AiDoBuildDefaultRoadBlock(
 					aib->use_tile,
 					_road_default_block_data[rule]->data,
 					DC_EXEC | DC_NO_TOWN_RATING
 				);
 				assert(!CmdFailed(r));
+			}
 		} while (++aib,--j);
+	}
 	// check if we're done with all of them
 	aib = &p->ai.src;
 	j = p->ai.num_build_rec;
 	do {
 		if (aib->cur_building_rule == 255) return;
 	} while (++aib,--j);
 	// yep, all are done. switch state to the rail building state.
 	p->ai.state = AIS_BUILD_ROAD;
 	p->ai.state_mode = 255;
+}
 typedef struct {
 	TileIndex final_tile;
 	byte final_dir;
 	byte depth;
 	byte recursive_mode;
 	byte cur_best_dir;
 	byte best_dir;
 	byte cur_best_depth;
 	byte best_depth;
 	uint cur_best_dist;
 	const byte *best_ptr;
 	uint best_dist;
 	TileIndex cur_best_tile, best_tile;
 	TileIndex bridge_end_tile;
 	Player *player;
 } AiRoadFinder;
 typedef struct AiRoadEnum {
 	TileIndex dest;
 	TileIndex best_tile;
 	int best_track;
 	uint best_dist;
 } AiRoadEnum;
 static const byte _dir_by_track[] = {
 , 1, 0, 1, 2, 1,
 , 0,
 , 3, 3, 2, 3, 0,
 };
 static void AiBuildRoadRecursive(AiRoadFinder *arf, TileIndex tile, int dir);
 static bool AiCheckRoadPathBetter(AiRoadFinder *arf, const byte *p)
+{
 	bool better = false;
 	if (arf->recursive_mode < 1) {
 		// Mode is 0. This means destination has not been found yet.
 		// If the found path is shorter than the current one, remember it.
 		if (arf->cur_best_dist < arf->best_dist ||
 			(arf->cur_best_dist == arf->best_dist && arf->cur_best_depth < arf->best_depth)) {
 			arf->best_depth = arf->cur_best_depth;
 			arf->best_dist = arf->cur_best_dist;
 			arf->best_dir = arf->cur_best_dir;
 			arf->best_ptr = p;
 			arf->best_tile = arf->cur_best_tile;
 			better = true;
+		}
 	} else if (arf->recursive_mode > 1) {
 		// Mode is 2.
 		if (arf->best_dist != 0 || arf->cur_best_depth < arf->best_depth) {
 			arf->best_depth = arf->cur_best_depth;
 			arf->best_dist = 0;
 			arf->best_ptr = p;
 			arf->best_tile = 0;
 			better = true;
+		}
+	}
 	arf->recursive_mode = 0;
 	arf->cur_best_dist = (uint)-1;
 	arf->cur_best_depth = 0xff;
 	return better;
+}
 static bool AiEnumFollowRoad(TileIndex tile, AiRoadEnum *a, int track, uint length, byte *state)
+{
 	uint dist = DistanceManhattan(tile, a->dest);
 	if (dist <= a->best_dist) {
 		TileIndex tile2 = TILE_MASK(tile + TileOffsByDiagDir(_dir_by_track[track]));
 		if (IsTileType(tile2, MP_STREET) && GetRoadTileType(tile2) == ROAD_TILE_NORMAL) {
 			a->best_dist = dist;
 			a->best_tile = tile;
 			a->best_track = track;
+		}
+	}
 	return false;
+}
 static const uint16 _ai_road_table_and[4] = {
 x1009,
 x16,
 x520,
 x2A00,
 };
 static bool AiCheckRoadFinished(Player *p)
+{
 	AiRoadEnum are;
 	TileIndex tile;
 	int dir = p->ai.cur_dir_a;
 	uint32 bits;
 	int i;
 	are.dest = p->ai.cur_tile_b;
 	tile = TILE_MASK(p->ai.cur_tile_a + TileOffsByDiagDir(dir));
 	if (IsRoadStopTile(tile) || IsTileDepotType(tile, TRANSPORT_ROAD)) return false;
 	bits = GetTileTrackStatus(tile, TRANSPORT_ROAD) & _ai_road_table_and[dir];
 	if (bits == 0) return false;
 	are.best_dist = (uint)-1;
 	for_each_bit(i, bits) {
 		FollowTrack(tile, 0x3000 | TRANSPORT_ROAD, _dir_by_track[i], (TPFEnumProc*)AiEnumFollowRoad, NULL, &are);
+	}
 	if (DistanceManhattan(tile, are.dest) <= are.best_dist) return false;
 	if (are.best_dist == 0) return true;
 	p->ai.cur_tile_a = are.best_tile;
 	p->ai.cur_dir_a = _dir_by_track[are.best_track];
 	return false;
+}
 static bool AiBuildRoadHelper(TileIndex tile, int flags, int type)
+{
 	static const RoadBits _road_bits[] = {
 		ROAD_X,
 		ROAD_Y,
 		ROAD_NW | ROAD_NE,
 		ROAD_SW | ROAD_SE,
 		ROAD_NW | ROAD_SW,
 		ROAD_SE | ROAD_NE
 	};
 	return !CmdFailed(DoCommand(tile, _road_bits[type], 0, flags, CMD_BUILD_ROAD));
+}
 static inline void AiCheckBuildRoadBridgeHere(AiRoadFinder *arf, TileIndex tile, const byte *p)
+{
 	Slope tileh;
 	uint z;
 	bool flag;
 	int dir2 = p[0] & 3;
 	tileh = GetTileSlope(tile, &z);
 	if (tileh == _dir_table_1[dir2] || (tileh == SLOPE_FLAT && z != 0)) {
 		TileIndex tile_new = tile;
 		// Allow bridges directly over bottom tiles
 		flag = z == 0;
 		for (;;) {
 			TileType type;
 			if ((TileIndexDiff)tile_new < -TileOffsByDiagDir(dir2)) return; // Wraping around map, no bridge possible!
 			tile_new = TILE_MASK(tile_new + TileOffsByDiagDir(dir2));
 			type = GetTileType(tile_new);
 			if (type == MP_CLEAR || type == MP_TREES || GetTileSlope(tile, NULL) != SLOPE_FLAT) {
 				// Allow a bridge if either we have a tile that's water, rail or street,
 				// or if we found an up tile.
 				if (!flag) return;
 				break;
+			}
 			if (type != MP_WATER && type != MP_RAILWAY && type != MP_STREET) return;
 			flag = true;
+		}
 		// Is building a (rail)bridge possible at this place (type doesn't matter)?
 		if (CmdFailed(DoCommand(tile_new, tile, 0x8000, DC_AUTO, CMD_BUILD_BRIDGE)))
 			return;
 		AiBuildRoadRecursive(arf, tile_new, dir2);
 		// At the bottom depth, check if the new path is better than the old one.
 		if (arf->depth == 1) {
 			if (AiCheckRoadPathBetter(arf, p)) arf->bridge_end_tile = tile_new;
+		}
+	}
+}
 static inline void AiCheckBuildRoadTunnelHere(AiRoadFinder *arf, TileIndex tile, const byte *p)
+{
 	uint z;
 	if (GetTileSlope(tile, &z) == _dir_table_2[p[0] & 3] && z != 0) {
 		int32 cost = DoCommand(tile, 0x200, 0, DC_AUTO, CMD_BUILD_TUNNEL);
 		if (!CmdFailed(cost) && cost <= (arf->player->player_money>>4)) {
 			AiBuildRoadRecursive(arf, _build_tunnel_endtile, p[0]&3);
 			if (arf->depth == 1)  AiCheckRoadPathBetter(arf, p);
+		}
+	}
+}
 static void AiBuildRoadRecursive(AiRoadFinder *arf, TileIndex tile, int dir)
+{
 	const byte *p;
 	tile = TILE_MASK(tile + TileOffsByDiagDir(dir));
 	// Reached destination?
 	if (tile == arf->final_tile) {
 		if ((arf->final_dir^2) == dir) {
 			arf->recursive_mode = 2;
 			arf->cur_best_depth = arf->depth;
+		}
 		return;
+	}
 	// Depth too deep?
 	if (arf->depth >= 4) {
 		uint dist = DistanceMaxPlusManhattan(tile, arf->final_tile);
 		if (dist < arf->cur_best_dist) {
 			// Store the tile that is closest to the final position.
 			arf->cur_best_dist = dist;
 			arf->cur_best_tile = tile;
 			arf->cur_best_dir = dir;
 			arf->cur_best_depth = arf->depth;
+		}
 		return;
+	}
 	// Increase recursion depth
 	arf->depth++;
 	// Grab pointer to list of stuff that is possible to build
 	p = _ai_table_15[dir];
 	// Try to build a single rail in all directions.
 	if (GetTileZ(tile) == 0) {
 		p += 6;
 	} else {
 		do {
 			// Make sure that a road can be built here.
 			if (AiBuildRoadHelper(tile, DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, p[0])) {
 				AiBuildRoadRecursive(arf, tile, p[1]);
+			}
 			// At the bottom depth?
 			if (arf->depth == 1) AiCheckRoadPathBetter(arf, p);
 			p += 2;
 		} while (!(p[0] & 0x80));
+	}
 	AiCheckBuildRoadBridgeHere(arf, tile, p);
 	AiCheckBuildRoadTunnelHere(arf, tile, p+1);
 	arf->depth--;
+}
 static void AiBuildRoadConstruct(Player *p)
+{
 	AiRoadFinder arf;
 	int i;
 	TileIndex tile;
 	// Reached destination?
 	if (AiCheckRoadFinished(p)) {
 		p->ai.state_mode = 255;
 		return;
+	}
 	// Setup recursive finder and call it.
 	arf.player = p;
 	arf.final_tile = p->ai.cur_tile_b;
 	arf.final_dir = p->ai.cur_dir_b;
 	arf.depth = 0;
 	arf.recursive_mode = 0;
 	arf.best_ptr = NULL;
 	arf.cur_best_dist = (uint)-1;
 	arf.cur_best_depth = 0xff;
 	arf.best_dist = (uint)-1;
 	arf.best_depth =  0xff;
 	arf.cur_best_tile = 0;
 	arf.best_tile = 0;
 	AiBuildRoadRecursive(&arf, p->ai.cur_tile_a, p->ai.cur_dir_a);
 	// Reached destination?
 	if (arf.recursive_mode == 2 && arf.cur_best_depth == 0) {
 		p->ai.state_mode = 255;
 		return;
+	}
 	// Didn't find anything to build?
 	if (arf.best_ptr == NULL) {
 		// Terraform some
 do_some_terraform:
 		for (i = 0; i != 5; i++)
 			AiDoTerraformLand(p->ai.cur_tile_a, p->ai.cur_dir_a, 3, 0);
 		if (++p->ai.state_counter == 21) {
 			p->ai.state_mode = 1;
 			p->ai.cur_tile_a = TILE_MASK(p->ai.cur_tile_a + TileOffsByDiagDir(p->ai.cur_dir_a));
 			p->ai.cur_dir_a ^= 2;
 			p->ai.state_counter = 0;
+		}
 		return;
+	}
 	tile = TILE_MASK(p->ai.cur_tile_a + TileOffsByDiagDir(p->ai.cur_dir_a));
 	if (arf.best_ptr[0]&0x80) {
 		int i;
 		int32 bridge_len;
 		p->ai.cur_tile_a = arf.bridge_end_tile;
 		bridge_len = GetBridgeLength(tile, p->ai.cur_tile_a); // tile
 		/* Figure out what (road)bridge type to build
 		 * start with best bridge, then go down to worse and worse bridges
 		 * unnecessary to check for worse bridge (i=0), since AI will always build that.
 		 *AI is so fucked up that fixing this small thing will probably not solve a thing
 		 */
 		for (i = 10; i != 0; i--) {
 			if (CheckBridge_Stuff(i, bridge_len)) {
 				int32 cost = DoCommand(tile, p->ai.cur_tile_a, i + (0x80 << 8), DC_AUTO, CMD_BUILD_BRIDGE);
 				if (!CmdFailed(cost) && cost < (p->player_money >> 5)) break;
+			}
+		}
 		// Build it
 		DoCommand(tile, p->ai.cur_tile_a, i + (0x80 << 8), DC_AUTO | DC_EXEC, CMD_BUILD_BRIDGE);
 		p->ai.state_counter = 0;
 	} else if (arf.best_ptr[0]&0x40) {
 		// tunnel
 		DoCommand(tile, 0x200, 0, DC_AUTO | DC_EXEC, CMD_BUILD_TUNNEL);
 		p->ai.cur_tile_a = _build_tunnel_endtile;
 		p->ai.state_counter = 0;
 	} else {
 		// road
 		if (!AiBuildRoadHelper(tile, DC_EXEC | DC_AUTO | DC_NO_WATER | DC_AI_BUILDING, arf.best_ptr[0]))
 			goto do_some_terraform;
 		p->ai.cur_dir_a = arf.best_ptr[1];
 		p->ai.cur_tile_a = tile;
 		p->ai.state_counter = 0;
+	}
 	if (arf.best_tile != 0) {
 		for (i = 0; i != 2; i++)
 			AiDoTerraformLand(arf.best_tile, arf.best_dir, 3, 0);
+	}
+}
 static void AiBuildRoad(Player *p)
+{
 	if (p->ai.state_mode < 1) {
 		// Construct mode, build new road.
 		AiBuildRoadConstruct(p);
 	} else if (p->ai.state_mode == 1) {
 		// Destruct mode, not implemented for roads.
 		p->ai.state_mode = 2;
 		p->ai.state_counter = 0;
 	} else if (p->ai.state_mode == 2) {
 		uint i;
 		// Terraform some and then try building again.
 		for (i = 0; i != 4; i++) {
 			AiDoTerraformLand(p->ai.cur_tile_a, p->ai.cur_dir_a, 3, 0);
+		}
 		if (++p->ai.state_counter == 4) {
 			p->ai.state_counter = 0;
 			p->ai.state_mode = 0;
+		}
+	}
+}
 static TileIndex AiGetRoadBlockEdge(byte rule, TileIndex tile, int *dir)
+{
 	const AiDefaultBlockData *p = _road_default_block_data[rule]->data;
 	while (p->mode != 1) p++;
 	*dir = p->attr;
 	return TILE_ADD(tile, ToTileIndexDiff(p->tileoffs));
+}
 static void AiStateBuildRoad(Player *p)
+{
 	int num;
 	AiBuildRec *aib;
 	byte cmd;
 	TileIndex tile;
 	int dir;
 	// time out?
 	if (++p->ai.timeout_counter == 1388) {
 		p->ai.state = AIS_DELETE_ROAD_BLOCKS;
 		return;
+	}
 	// Currently building a road between two points?
 	if (p->ai.state_mode != 255) {
 		AiBuildRoad(p);
 		// Alternate between edges
 		swap_tile(&p->ai.start_tile_a, &p->ai.start_tile_b);
 		swap_tile(&p->ai.cur_tile_a, &p->ai.cur_tile_b);
 		swap_byte(&p->ai.start_dir_a, &p->ai.start_dir_b);
 		swap_byte(&p->ai.cur_dir_a, &p->ai.cur_dir_b);
 		return;
+	}
 	// Now, find two new points to build between
 	num = p->ai.num_build_rec;
 	aib = &p->ai.src;
 	for (;;) {
 		cmd = aib->buildcmd_a;
 		aib->buildcmd_a = 255;
 		if (cmd != 255) break;
 		aib++;
 		if (--num == 0) {
 			p->ai.state = AIS_BUILD_ROAD_VEHICLES;
 			return;
+		}
+	}
 	// Find first edge to build from.
 	tile = AiGetRoadBlockEdge(aib->cur_building_rule, aib->use_tile, &dir);
 	p->ai.start_tile_a = tile;
 	p->ai.cur_tile_a = tile;
 	p->ai.start_dir_a = dir;
 	p->ai.cur_dir_a = dir;
 	// Find second edge to build to
 	aib = (&p->ai.src) + (cmd&0xF);
 	tile = AiGetRoadBlockEdge(aib->cur_building_rule, aib->use_tile, &dir);
 	p->ai.start_tile_b = tile;
 	p->ai.cur_tile_b = tile;
 	p->ai.start_dir_b = dir;
 	p->ai.cur_dir_b = dir;
 	// And setup state.
 	p->ai.state_mode = 2;
 	p->ai.state_counter = 0;
 	p->ai.banned_tile_count = 0;
+}
 static StationID AiGetStationIdFromRoadBlock(TileIndex tile, int id)
+{
 	const AiDefaultBlockData *p = _road_default_block_data[id]->data;
 	while (p->mode != 1) p++;
 	return GetStationIndex(TILE_ADD(tile, ToTileIndexDiff(p->tileoffs)));
+}
 static void AiStateBuildRoadVehicles(Player *p)
+{
 	const AiDefaultBlockData *ptr;
 	TileIndex tile;
 	VehicleID loco_id;
 	EngineID veh;
 	uint i;
 	ptr = _road_default_block_data[p->ai.src.cur_building_rule]->data;
 	for (; ptr->mode != 0; ptr++) {}
 	tile = TILE_ADD(p->ai.src.use_tile, ToTileIndexDiff(ptr->tileoffs));
 	veh = AiChooseRoadVehToBuild(p->ai.cargo_type, p->player_money, tile);
 	if (veh == INVALID_ENGINE) {
 		p->ai.state = AIS_0;
 		return;
+	}
 	if (CmdFailed(DoCommand(tile, veh, 0, DC_EXEC, CMD_BUILD_ROAD_VEH))) return;
 	loco_id = _new_vehicle_id;
 	if (GetVehicle(loco_id)->cargo_type != p->ai.cargo_type) {
 		/* Cargo type doesn't match, so refit it */
 		if (CmdFailed(DoCommand(tile, loco_id, p->ai.cargo_type, DC_EXEC, CMD_REFIT_ROAD_VEH))) {
 			/* Refit failed... sell the vehicle */
 			DoCommand(tile, loco_id, 0, DC_EXEC, CMD_SELL_ROAD_VEH);
 			return;
+		}
+	}
 	for (i = 0; p->ai.order_list_blocks[i] != 0xFF; i++) {
 		const AiBuildRec* aib = &p->ai.src + p->ai.order_list_blocks[i];
 		bool is_pass = (
 			p->ai.cargo_type == CT_PASSENGERS ||
 			p->ai.cargo_type == CT_MAIL ||
 			(_opt.landscape == LT_NORMAL && p->ai.cargo_type == CT_VALUABLES)
 		);
 		Order order;
 		order.type = OT_GOTO_STATION;
 		order.flags = 0;
 		order.dest = AiGetStationIdFromRoadBlock(aib->use_tile, aib->cur_building_rule);
 		if (!is_pass && i == 1) order.flags |= OF_UNLOAD;
 		if (p->ai.num_want_fullload != 0 && (is_pass || i == 0))
 			order.flags |= OF_FULL_LOAD;
 		DoCommand(0, loco_id + (i << 16), PackOrder(&order), DC_EXEC, CMD_INSERT_ORDER);
+	}
 	DoCommand(0, loco_id, 0, DC_EXEC, CMD_START_STOP_ROADVEH);
 	DoCommand(0, loco_id, _ai_service_interval, DC_EXEC, CMD_CHANGE_SERVICE_INT);
 	if (p->ai.num_want_fullload != 0) p->ai.num_want_fullload--;
 	if (--p->ai.num_loco_to_build == 0) p->ai.state = AIS_0;
+}
 static void AiStateDeleteRoadBlocks(Player *p)
+{
 	const AiBuildRec* aib = &p->ai.src;
 	uint num = p->ai.num_build_rec;
 	do {
 		const AiDefaultBlockData* b;
 		if (aib->cur_building_rule == 255) continue;
 		for (b = _road_default_block_data[aib->cur_building_rule]->data; b->mode != 4; b++) {
 			if (b->mode > 1) continue;
 			DoCommand(TILE_ADD(aib->use_tile, ToTileIndexDiff(b->tileoffs)), 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
+		}
 	} while (++aib,--num);
 	p->ai.state = AIS_0;
+}
 static void AiStateAirportStuff(Player *p)
+{
 	const Station* st;
 	byte acc_planes;
 	int i;
 	AiBuildRec *aib;
 	byte rule;
 	// Here we look for an airport we could use instead of building a new
 	// one. If we find such an aiport for any waypoint,
 	// AiStateBuildDefaultAirportBlocks() will kindly skip that one when
 	// building the waypoints.
 	i = 0;
 	do {
 		// We do this all twice - once for the source (town in the case
 		// of oilrig route) and then for the destination (oilrig in the
 		// case of oilrig route).
 		aib = &p->ai.src + i;
 		FOR_ALL_STATIONS(st) {
 			// Is this an airport?
 			if (!(st->facilities & FACIL_AIRPORT)) continue;
 			// Do we own the airport? (Oilrigs aren't owned, though.)
 			if (st->owner != OWNER_NONE && st->owner != _current_player) continue;
 			acc_planes = GetAirport(st->airport_type)->acc_planes;
 			// Dismiss heliports, unless we are checking an oilrig.
 			if (acc_planes == HELICOPTERS_ONLY && (p->ai.build_kind != 1 || i != 1))
 				continue;
 			// Dismiss country airports if we are doing the other
 			// endpoint of an oilrig route.
 			if (acc_planes == AIRCRAFT_ONLY && (p->ai.build_kind == 1 && i == 0))
 				continue;
 			// Dismiss airports too far away.
 			if (DistanceMax(st->airport_tile, aib->spec_tile) > aib->rand_rng)
 				continue;
 			// It's ideal airport, let's take it!
 			/* XXX: This part is utterly broken - rule should
 			 * contain number of the rule appropriate for the
 			 * airport type (country, town, ...), see
 			 * _airport_default_block_data (rule is just an index
 			 * in this array). But the only difference between the
 			 * currently existing two rules (rule 0 - town and rule
 			 * 1 - country) is the attr field which is used only
 			 * when building new airports - and that's irrelevant
 			 * for us. So using just about any rule will suffice
 			 * here for now (some of the new airport types would be
 			 * broken because they will probably need different
 			 * tileoff values etc), no matter that
 			 * IsHangarTile() makes no sense. --pasky */
 			if (acc_planes == HELICOPTERS_ONLY) {
 				/* Heliports should have maybe own rulesets but
 				 * OTOH we don't want AI to pick them up when
 				 * looking for a suitable airport type to build.
 				 * So any of rules 0 or 1 would do for now. The
 				 * original rule number was 2 but that's a bug
 				 * because we have no such rule. */
 				rule = 1;
 			} else {
 				rule = IsHangarTile(st->airport_tile);
+			}
 			aib->cur_building_rule = rule;
 			aib->use_tile = st->airport_tile;
 			break;
+		}
 	} while (++i != p->ai.num_build_rec);
 	p->ai.state = AIS_BUILD_DEFAULT_AIRPORT_BLOCKS;
 	p->ai.state_mode = 255;
 	p->ai.state_counter = 0;
+}
 static int32 AiDoBuildDefaultAirportBlock(TileIndex tile, const AiDefaultBlockData *p, byte flag)
+{
 	int32 total_cost = 0, ret;
 	for (; p->mode == 0; p++) {
 		if (!HASBIT(_avail_aircraft, p->attr)) return CMD_ERROR;
 		ret = DoCommand(TILE_MASK(tile + ToTileIndexDiff(p->tileoffs)), p->attr,0,flag | DC_AUTO | DC_NO_WATER,CMD_BUILD_AIRPORT);
 		if (CmdFailed(ret)) return CMD_ERROR;
 		total_cost += ret;
+	}
 	return total_cost;
+}
 static bool AiCheckAirportResources(TileIndex tile, const AiDefaultBlockData *p, byte cargo)
+{
 	uint values[NUM_CARGO];
 	int rad;
 	if (_patches.modified_catchment) {
 		rad = CA_AIR_LARGE; // I Have NFI what airport the
 	} else { // AI is going to build here
 		rad = 4;
+	}
 	for (; p->mode == 0; p++) {
 		TileIndex tile2 = TILE_ADD(tile, ToTileIndexDiff(p->tileoffs));
 		const AirportFTAClass* airport = GetAirport(p->attr);
 		uint w = airport->size_x;
 		uint h = airport->size_y;
 		if (cargo & 0x80) {
 			GetProductionAroundTiles(values, tile2, w, h, rad);
 			return values[cargo & 0x7F] != 0;
 		} else {
 			GetAcceptanceAroundTiles(values, tile2, w, h, rad);
 			return values[cargo] >= 8;
+		}
+	}
 	return true;
+}
 static int AiFindBestDefaultAirportBlock(TileIndex tile, byte cargo, byte heli, int32 *cost)
+{
 	const AiDefaultBlockData *p;
 	uint i;
 	for (i = 0; (p = _airport_default_block_data[i]) != NULL; i++) {
 		// If we are doing a helicopter service, avoid building
 		// airports where they can't land.
 		if (heli && GetAirport(p->attr)->acc_planes == AIRCRAFT_ONLY) continue;
 		*cost = AiDoBuildDefaultAirportBlock(tile, p, 0);
 		if (!CmdFailed(*cost) && AiCheckAirportResources(tile, p, cargo))
 			return i;
+	}
 	return -1;
+}
 static void AiStateBuildDefaultAirportBlocks(Player *p)
+{
 	int i, j;
 	AiBuildRec *aib;
 	int rule;
 	int32 cost;
 	// time out?
 	if (++p->ai.timeout_counter == 1388) {
 		p->ai.state = AIS_0;
 		return;
+	}
 	// do the following 8 times
 	i = 8;
 	do {
 		// check if we can build the default
 		aib = &p->ai.src;
 		j = p->ai.num_build_rec;
 		do {
 			// this item has already been built?
 			if (aib->cur_building_rule != 255) continue;
 			// adjust the coordinate randomly,
 			// to make sure that we find a position.
 			aib->use_tile = AdjustTileCoordRandomly(aib->spec_tile, aib->rand_rng);
 			// check if the aircraft stuff can be built there.
 			rule = AiFindBestDefaultAirportBlock(aib->use_tile, aib->cargo, p->ai.build_kind, &cost);
 //			SetRedErrorSquare(aib->use_tile);
 			if (rule == -1) {
 				// cannot build, terraform after a while
 				if (p->ai.state_counter >= 600) {
 					AiDoTerraformLand(aib->use_tile, Random()&3, 3, (int8)p->ai.state_mode);
+				}
 				// also try the other terraform direction
 				if (++p->ai.state_counter >= 1000) {
 					p->ai.state_counter = 0;
 					p->ai.state_mode = -p->ai.state_mode;
+				}
 			} else if (CheckPlayerHasMoney(cost) && AiCheckBlockDistances(p,aib->use_tile)) {
 				// player has money, build it.
 				int32 r;
 				aib->cur_building_rule = rule;
 				r = AiDoBuildDefaultAirportBlock(
 					aib->use_tile,
 					_airport_default_block_data[rule],
 					DC_EXEC | DC_NO_TOWN_RATING
 				);
 				assert(!CmdFailed(r));
+			}
 		} while (++aib,--j);
 	} while (--i);
 	// check if we're done with all of them
 	aib = &p->ai.src;
 	j = p->ai.num_build_rec;
 	do {
 		if (aib->cur_building_rule == 255) return;
 	} while (++aib,--j);
 	// yep, all are done. switch state.
 	p->ai.state = AIS_BUILD_AIRCRAFT_VEHICLES;
+}
 static StationID AiGetStationIdFromAircraftBlock(TileIndex tile, int id)
+{
 	const AiDefaultBlockData *p = _airport_default_block_data[id];
 	while (p->mode != 1) p++;
 	return GetStationIndex(TILE_ADD(tile, ToTileIndexDiff(p->tileoffs)));
+}
 static void AiStateBuildAircraftVehicles(Player *p)
+{
 	const AiDefaultBlockData *ptr;
 	TileIndex tile;
 	EngineID veh;
 	int i;
 	VehicleID loco_id;
 	ptr = _airport_default_block_data[p->ai.src.cur_building_rule];
 	for (; ptr->mode != 0; ptr++) {}
 	tile = TILE_ADD(p->ai.src.use_tile, ToTileIndexDiff(ptr->tileoffs));
 	veh = AiChooseAircraftToBuild(p->player_money, p->ai.build_kind != 0 ? 0 : AIR_CTOL);
 	if (veh == INVALID_ENGINE) return;
 	/* XXX - Have the AI pick the hangar terminal in an airport. Eg get airport-type
 	 * and offset to the FIRST depot because the AI picks the st->xy tile */
 	tile += ToTileIndexDiff(GetAirport(GetStationByTile(tile)->airport_type)->airport_depots[0]);
 	if (CmdFailed(DoCommand(tile, veh, 0, DC_EXEC, CMD_BUILD_AIRCRAFT))) return;
 	loco_id = _new_vehicle_id;
 	for (i = 0; p->ai.order_list_blocks[i] != 0xFF; i++) {
 		AiBuildRec *aib = (&p->ai.src) + p->ai.order_list_blocks[i];
 		bool is_pass = (p->ai.cargo_type == CT_PASSENGERS || p->ai.cargo_type == CT_MAIL);
 		Order order;
 		order.type = OT_GOTO_STATION;
 		order.flags = 0;
 		order.dest = AiGetStationIdFromAircraftBlock(aib->use_tile, aib->cur_building_rule);
 		if (!is_pass && i == 1) order.flags |= OF_UNLOAD;
 		if (p->ai.num_want_fullload != 0 && (is_pass || i == 0))
 			order.flags |= OF_FULL_LOAD;
 		DoCommand(0, loco_id + (i << 16), PackOrder(&order), DC_EXEC, CMD_INSERT_ORDER);
+	}
 	DoCommand(0, loco_id, 0, DC_EXEC, CMD_START_STOP_AIRCRAFT);
 	DoCommand(0, loco_id, _ai_service_interval, DC_EXEC, CMD_CHANGE_SERVICE_INT);
 	if (p->ai.num_want_fullload != 0) p->ai.num_want_fullload--;
 	if (--p->ai.num_loco_to_build == 0) p->ai.state = AIS_0;
+}
 static void AiStateCheckShipStuff(Player *p)
+{
 	// XXX
 	error("!AiStateCheckShipStuff");
+}
 static void AiStateBuildDefaultShipBlocks(Player *p)
+{
 	// XXX
 	error("!AiStateBuildDefaultShipBlocks");
+}
 static void AiStateDoShipStuff(Player *p)
+{
 	// XXX
 	error("!AiStateDoShipStuff");
+}
 static void AiStateSellVeh(Player *p)
+{
 	Vehicle *v = p->ai.cur_veh;
 	if (v->owner == _current_player) {
 		if (v->type == VEH_Train) {
 			if (!IsTileDepotType(v->tile, TRANSPORT_RAIL) || v->u.rail.track != 0x80 || !(v->vehstatus&VS_STOPPED)) {
 				if (v->current_order.type != OT_GOTO_DEPOT)
 					DoCommand(0, v->index, 0, DC_EXEC, CMD_SEND_TRAIN_TO_DEPOT);
 				goto going_to_depot;
+			}
 			// Sell whole train
 			DoCommand(v->tile, v->index, 1, DC_EXEC, CMD_SELL_RAIL_WAGON);
 		} else if (v->type == VEH_Road) {
 			if (!IsRoadVehInDepotStopped(v)) {
 				if (v->current_order.type != OT_GOTO_DEPOT)
 					DoCommand(0, v->index, 0, DC_EXEC, CMD_SEND_ROADVEH_TO_DEPOT);
 				goto going_to_depot;
+			}
 			DoCommand(0, v->index, 0, DC_EXEC, CMD_SELL_ROAD_VEH);
 		} else if (v->type == VEH_Aircraft) {
 			if (!IsAircraftInHangarStopped(v)) {
 				if (v->current_order.type != OT_GOTO_DEPOT)
 					DoCommand(0, v->index, 0, DC_EXEC, CMD_SEND_AIRCRAFT_TO_HANGAR);
 				goto going_to_depot;
+			}
 			DoCommand(0, v->index, 0, DC_EXEC, CMD_SELL_AIRCRAFT);
 			} else if (v->type == VEH_Ship) {
 			// XXX: not implemented
 			error("!v->type == VEH_Ship");
+		}
+	}
 	goto return_to_loop;
 going_to_depot:;
 	if (++p->ai.state_counter <= 832) return;
 	if (v->current_order.type == OT_GOTO_DEPOT) {
 		v->current_order.type = OT_DUMMY;
 		v->current_order.flags = 0;
 		InvalidateWindow(WC_VEHICLE_VIEW, v->index);
+	}
 return_to_loop:;
 	p->ai.state = AIS_VEH_LOOP;
+}
 static void AiStateRemoveStation(Player *p)
+{
 	// Remove stations that aren't in use by any vehicle
 	byte *in_use;
 	const Order *ord;
 	const Station *st;
 	TileIndex tile;
 	// Go to this state when we're done.
 	p->ai.state = AIS_1;
 	// Get a list of all stations that are in use by a vehicle
 	in_use = malloc(GetMaxStationIndex() + 1);
 	memset(in_use, 0, GetMaxStationIndex() + 1);
 	FOR_ALL_ORDERS(ord) {
 		if (ord->type == OT_GOTO_STATION) in_use[ord->dest] = 1;
+	}
 	// Go through all stations and delete those that aren't in use
 	FOR_ALL_STATIONS(st) {
 		if (st->owner == _current_player && !in_use[st->index] &&
 				( (st->bus_stops != NULL && (tile = st->bus_stops->xy) != 0) ||
 					(st->truck_stops != NULL && (tile = st->truck_stops->xy)) != 0 ||
 					(tile = st->train_tile) != 0 ||
 					(tile = st->dock_tile) != 0 ||
 					(tile = st->airport_tile) != 0)) {
 			DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
+		}
+	}
 	free(in_use);
+}
 static void AiRemovePlayerRailOrRoad(Player *p, TileIndex tile)
+{
 	TrackBits rails;
 	if (IsTileType(tile, MP_RAILWAY)) {
 		if (!IsTileOwner(tile, _current_player)) return;
 		if (IsPlainRailTile(tile)) {
 is_rail_crossing:;
 			rails = GetRailTrackStatus(tile);
 			if (rails == TRACK_BIT_HORZ || rails == TRACK_BIT_VERT) return;
 			if (rails & TRACK_BIT_3WAY_NE) {
 pos_0:
 				if ((GetRailTrackStatus(TILE_MASK(tile - TileDiffXY(1, 0))) & TRACK_BIT_3WAY_SW) == 0) {
 					p->ai.cur_dir_a = 0;
 					p->ai.cur_tile_a = tile;
 					p->ai.state = AIS_REMOVE_SINGLE_RAIL_TILE;
 					return;
+				}
+			}
 			if (rails & TRACK_BIT_3WAY_SE) {
 pos_1:
 				if ((GetRailTrackStatus(TILE_MASK(tile + TileDiffXY(0, 1))) & TRACK_BIT_3WAY_NW) == 0) {
 					p->ai.cur_dir_a = 1;
 					p->ai.cur_tile_a = tile;
 					p->ai.state = AIS_REMOVE_SINGLE_RAIL_TILE;
 					return;
+				}
+			}
 			if (rails & TRACK_BIT_3WAY_SW) {
 pos_2:
 				if ((GetRailTrackStatus(TILE_MASK(tile + TileDiffXY(1, 0))) & TRACK_BIT_3WAY_NE) == 0) {
 					p->ai.cur_dir_a = 2;
 					p->ai.cur_tile_a = tile;
 					p->ai.state = AIS_REMOVE_SINGLE_RAIL_TILE;
 					return;
+				}
+			}
 			if (rails & TRACK_BIT_3WAY_NW) {
 pos_3:
 				if ((GetRailTrackStatus(TILE_MASK(tile - TileDiffXY(0, 1))) & TRACK_BIT_3WAY_SE) == 0) {
 					p->ai.cur_dir_a = 3;
 					p->ai.cur_tile_a = tile;
 					p->ai.state = AIS_REMOVE_SINGLE_RAIL_TILE;
 					return;
+				}
+			}
 		} else {
 			static const byte _depot_bits[] = {0x19,0x16,0x25,0x2A};
 			DiagDirection dir = GetRailDepotDirection(tile);
 			if (GetRailTrackStatus(tile + TileOffsByDiagDir(dir)) & _depot_bits[dir])
 				return;
 			DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
+		}
 	} else if (IsTileType(tile, MP_STREET)) {
 		if (!IsTileOwner(tile, _current_player)) return;
 		if (IsLevelCrossing(tile)) goto is_rail_crossing;
 		if (GetRoadTileType(tile) == ROAD_TILE_DEPOT) {
 			DiagDirection dir;
 			TileIndex t;
 			// Check if there are any stations around.
 			t = tile + TileDiffXY(-1, 0);
 			if (IsTileType(t, MP_STATION) && IsTileOwner(t, _current_player)) return;
 			t = tile + TileDiffXY(1, 0);
 			if (IsTileType(t, MP_STATION) && IsTileOwner(t, _current_player)) return;
 			t = tile + TileDiffXY(0, -1);
 			if (IsTileType(t, MP_STATION) && IsTileOwner(t, _current_player)) return;
 			t = tile + TileDiffXY(0, 1);
 			if (IsTileType(t, MP_STATION) && IsTileOwner(t, _current_player)) return;
 			dir = GetRoadDepotDirection(tile);
 			DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
 			DoCommand(
 				TILE_MASK(tile + TileOffsByDiagDir(dir)),
 				DiagDirToRoadBits(ReverseDiagDir(dir)),
 ,
 				DC_EXEC,
 				CMD_REMOVE_ROAD);
+		}
 	} else if (IsTileType(tile, MP_TUNNELBRIDGE)) {
 		if (!IsTileOwner(tile, _current_player) ||
 				!IsBridge(tile) ||
 				GetBridgeTransportType(tile) != TRANSPORT_RAIL) {
 			return;
+		}
 		rails = 0;
 		switch (GetBridgeRampDirection(tile)) {
 			default:
 			case DIAGDIR_NE: goto pos_2;
 			case DIAGDIR_SE: goto pos_3;
 			case DIAGDIR_SW: goto pos_0;
 			case DIAGDIR_NW: goto pos_1;
+		}
+	}
+}
 static void AiStateRemoveTrack(Player *p)
+{
 	/* Was 1000 for standard 8x8 maps. */
 	int num = MapSizeX() * 4;
 	do {
 		TileIndex tile = ++p->ai.state_counter;
 		// Iterated all tiles?
 		if (tile >= MapSize()) {
 			p->ai.state = AIS_REMOVE_STATION;
 			return;
+		}
 		// Remove player stuff in that tile
 		AiRemovePlayerRailOrRoad(p, tile);
 		if (p->ai.state != AIS_REMOVE_TRACK) return;
 	} while (--num);
+}
 static void AiStateRemoveSingleRailTile(Player *p)
+{
 	// Remove until we can't remove more.
 	if (!AiRemoveTileAndGoForward(p)) p->ai.state = AIS_REMOVE_TRACK;
+}
 static AiStateAction * const _ai_actions[] = {
 	AiCase0,
 	AiCase1,
 	AiStateVehLoop,
 	AiStateCheckReplaceVehicle,
 	AiStateDoReplaceVehicle,
 	AiStateWantNewRoute,
 	AiStateBuildDefaultRailBlocks,
 	AiStateBuildRail,
 	AiStateBuildRailVeh,
 	AiStateDeleteRailBlocks,
 	AiStateBuildDefaultRoadBlocks,
 	AiStateBuildRoad,
 	AiStateBuildRoadVehicles,
 	AiStateDeleteRoadBlocks,
 	AiStateAirportStuff,
 	AiStateBuildDefaultAirportBlocks,
 	AiStateBuildAircraftVehicles,
 	AiStateCheckShipStuff,
 	AiStateBuildDefaultShipBlocks,
 	AiStateDoShipStuff,
 	AiStateSellVeh,
 	AiStateRemoveStation,
 	AiStateRemoveTrack,
 	AiStateRemoveSingleRailTile
 };
 extern void ShowBuyCompanyDialog(uint player);
 static void AiHandleTakeover(Player *p)
+{
 	if (p->bankrupt_timeout != 0) {
 		p->bankrupt_timeout -= 8;
 		if (p->bankrupt_timeout > 0) return;
 		p->bankrupt_timeout = 0;
 		DeleteWindowById(WC_BUY_COMPANY, _current_player);
 		if (IsLocalPlayer()) {
 			AskExitToGameMenu();
 			return;
+		}
 		if (IsHumanPlayer(_current_player)) return;
+	}
 	if (p->bankrupt_asked == 255) return;
+	{
 		uint asked = p->bankrupt_asked;
 		Player *pp, *best_pl = NULL;
 		int32 best_val = -1;
 		uint old_p;
 		// Ask the guy with the highest performance hist.
 		FOR_ALL_PLAYERS(pp) {
 			if (pp->is_active &&
 					!(asked&1) &&
 					pp->bankrupt_asked == 0 &&
 					best_val < pp->old_economy[1].performance_history) {
 				best_val = pp->old_economy[1].performance_history;
 				best_pl = pp;
+			}
 			asked>>=1;
+		}
 		// Asked all players?
 		if (best_val == -1) {
 			p->bankrupt_asked = 255;
 			return;
+		}
 		SETBIT(p->bankrupt_asked, best_pl->index);
 		if (best_pl->index == _local_player) {
 			p->bankrupt_timeout = 4440;
 			ShowBuyCompanyDialog(_current_player);
 			return;
+		}
 		if (IsHumanPlayer(best_pl->index)) return;
 		// Too little money for computer to buy it?
 		if (best_pl->player_money >> 1 >= p->bankrupt_value) {
 			// Computer wants to buy it.
 			old_p = _current_player;
 			_current_player = p->index;
 			DoCommand(0, old_p, 0, DC_EXEC, CMD_BUY_COMPANY);
 			_current_player = old_p;
+		}
+	}
+}
 static void AiAdjustLoan(const Player* p)
+{
 	int32 base = AiGetBasePrice(p);
 	if (p->player_money > base * 1400) {
 		// Decrease loan
 		if (p->current_loan != 0) {
 			DoCommand(0, 0, 0, DC_EXEC, CMD_DECREASE_LOAN);
+		}
 	} else if (p->player_money < base * 500) {
 		// Increase loan
 		if (p->current_loan < _economy.max_loan &&
 				p->num_valid_stat_ent >= 2 &&
 				-(p->old_economy[0].expenses+p->old_economy[1].expenses) < base * 60) {
 			DoCommand(0, 0, 0, DC_EXEC, CMD_INCREASE_LOAN);
+		}
+	}
+}
 static void AiBuildCompanyHQ(Player *p)
+{
 	TileIndex tile;
 	if (p->location_of_house == 0 &&
 			p->last_build_coordinate != 0) {
 		tile = AdjustTileCoordRandomly(p->last_build_coordinate, 8);
 		DoCommand(tile, 0, 0, DC_EXEC | DC_AUTO | DC_NO_WATER, CMD_BUILD_COMPANY_HQ);
+	}
+}
 void AiDoGameLoop(Player *p)
+{
 	if (p->bankrupt_asked != 0) {
 		AiHandleTakeover(p);
 		return;
+	}
 	// Ugly hack to make sure the service interval of the AI is good, not looking
 	//  to the patch-setting
 	// Also, it takes into account the setting if the service-interval is in days
 	//  or in %
 	_ai_service_interval = _patches.servint_ispercent?80:180;
 	if (IsHumanPlayer(_current_player)) return;
 	AiAdjustLoan(p);
 	AiBuildCompanyHQ(p);
 #if 0
+	{
 		static byte old_state = 99;
 		static bool hasdots = false;
 		char *_ai_state_names[]={
 			"AiCase0",
 			"AiCase1",
 			"AiStateVehLoop",
 			"AiStateCheckReplaceVehicle",
 			"AiStateDoReplaceVehicle",
 			"AiStateWantNewRoute",
 			"AiStateBuildDefaultRailBlocks",
 			"AiStateBuildRail",
 			"AiStateBuildRailVeh",
 			"AiStateDeleteRailBlocks",
 			"AiStateBuildDefaultRoadBlocks",
 			"AiStateBuildRoad",
 			"AiStateBuildRoadVehicles",
 			"AiStateDeleteRoadBlocks",
 			"AiStateAirportStuff",
 			"AiStateBuildDefaultAirportBlocks",
 			"AiStateBuildAircraftVehicles",
 			"AiStateCheckShipStuff",
 			"AiStateBuildDefaultShipBlocks",
 			"AiStateDoShipStuff",
 			"AiStateSellVeh",
 			"AiStateRemoveStation",
 			"AiStateRemoveTrack",
 			"AiStateRemoveSingleRailTile"
 		};
 		if (p->ai.state != old_state) {
 			if (hasdots)
 				printf("\n");
 			hasdots=false;
 			printf("AiState: %s\n", _ai_state_names[old_state=p->ai.state]);
 		} else {
 			printf(".");
 			hasdots=true;
+		}
+	}
 #endif
 	_ai_actions[p->ai.state](p);
+}

src/ai/trolly/build.c

➞

Show inline comments

deleted file

src/ai/trolly/build.cpp

➞

Show inline comments

@@ new file 100644 @@
 /* $Id$ */
 #include "../../stdafx.h"
 #include "../../openttd.h"
 #include "../../debug.h"
 #include "../../functions.h"
 #include "../../map.h"
 #include "../../road_map.h"
 #include "../../tile.h"
 #include "../../vehicle.h"
 #include "../../command.h"
 #include "trolly.h"
 #include "../../engine.h"
 #include "../../station.h"
 #include "../../variables.h"
 #include "../../bridge.h"
 #include "../ai.h"
 // Build HQ
 //  Params:
 //    tile : tile where HQ is going to be build
 bool AiNew_Build_CompanyHQ(Player *p, TileIndex tile)
+{
 	if (CmdFailed(AI_DoCommand(tile, 0, 0, DC_AUTO | DC_NO_WATER, CMD_BUILD_COMPANY_HQ)))
 		return false;
 	AI_DoCommand(tile, 0, 0, DC_EXEC | DC_AUTO | DC_NO_WATER, CMD_BUILD_COMPANY_HQ);
 	return true;
+}
 // Build station
 //  Params:
 //    type : AI_TRAIN/AI_BUS/AI_TRUCK : indicates the type of station
 //    tile : tile where station is going to be build
 //    length : in case of AI_TRAIN: length of station
 //    numtracks : in case of AI_TRAIN: tracks of station
 //    direction : the direction of the station
 //    flag : flag passed to DoCommand (normally 0 to get the cost or DC_EXEC to build it)
 int AiNew_Build_Station(Player *p, byte type, TileIndex tile, byte length, byte numtracks, byte direction, byte flag)
+{
 	if (type == AI_TRAIN)
 		return AI_DoCommand(tile, direction + (numtracks << 8) + (length << 16), 0, flag | DC_AUTO | DC_NO_WATER, CMD_BUILD_RAILROAD_STATION);
 	if (type == AI_BUS)
 		return AI_DoCommand(tile, direction, RS_BUS, flag | DC_AUTO | DC_NO_WATER, CMD_BUILD_ROAD_STOP);
 	return AI_DoCommand(tile, direction, RS_TRUCK, flag | DC_AUTO | DC_NO_WATER, CMD_BUILD_ROAD_STOP);
+}
 // Builds a brdige. The second best out of the ones available for this player
 //  Params:
 //   tile_a : starting point
 //   tile_b : end point
 //   flag : flag passed to DoCommand
 int AiNew_Build_Bridge(Player *p, TileIndex tile_a, TileIndex tile_b, byte flag)
+{
 	int bridge_type, bridge_len, type, type2;
 	// Find a good bridgetype (the best money can buy)
 	bridge_len = GetBridgeLength(tile_a, tile_b);
 	type = type2 = 0;
 	for (bridge_type = MAX_BRIDGES-1; bridge_type >= 0; bridge_type--) {
 		if (CheckBridge_Stuff(bridge_type, bridge_len)) {
 			type2 = type;
 			type = bridge_type;
 			// We found two bridges, exit
 			if (type2 != 0) break;
+		}
+	}
 	// There is only one bridge that can be built
 	if (type2 == 0 && type != 0) type2 = type;
 	// Now, simply, build the bridge!
 	if (p->ainew.tbt == AI_TRAIN) {
 		return AI_DoCommand(tile_a, tile_b, (0x00 << 8) + type2, flag | DC_AUTO, CMD_BUILD_BRIDGE);
 	} else {
 		return AI_DoCommand(tile_a, tile_b, (0x80 << 8) + type2, flag | DC_AUTO, CMD_BUILD_BRIDGE);
+	}
+}
 // Build the route part by part
 // Basicly what this function do, is build that amount of parts of the route
 //  that go in the same direction. It sets 'part' to the last part of the route builded.
 //  The return value is the cost for the builded parts
 //
 //  Params:
 //   PathFinderInfo : Pointer to the PathFinderInfo used for AiPathFinder
 //   part : Which part we need to build
 //
 // TODO: skip already builded road-pieces (e.g.: cityroad)
 int AiNew_Build_RoutePart(Player *p, Ai_PathFinderInfo *PathFinderInfo, byte flag)
+{
 	int part = PathFinderInfo->position;
 	byte *route_extra = PathFinderInfo->route_extra;
 	TileIndex *route = PathFinderInfo->route;
 	int dir;
 	int old_dir = -1;
 	int cost = 0;
 	int res;
 	// We need to calculate the direction with the parent of the parent.. so we skip
 	//  the first pieces and the last piece
 	if (part < 1) part = 1;
 	// When we are done, stop it
 	if (part >= PathFinderInfo->route_length - 1) {
 		PathFinderInfo->position = -2;
 		return 0;
+	}
 	if (PathFinderInfo->rail_or_road) {
 		// Tunnel code
 		if ((AI_PATHFINDER_FLAG_TUNNEL & route_extra[part]) != 0) {
 			cost += AI_DoCommand(route[part], 0, 0, flag, CMD_BUILD_TUNNEL);
 			PathFinderInfo->position++;
 			// TODO: problems!
 			if (CmdFailed(cost)) {
 				DEBUG(ai, 0, "[BuildPath] tunnel could not be built (0x%X)", route[part]);
 				return 0;
+			}
 			return cost;
+		}
 		// Bridge code
 		if ((AI_PATHFINDER_FLAG_BRIDGE & route_extra[part]) != 0) {
 			cost += AiNew_Build_Bridge(p, route[part], route[part-1], flag);
 			PathFinderInfo->position++;
 			// TODO: problems!
 			if (CmdFailed(cost)) {
 				DEBUG(ai, 0, "[BuildPath] bridge could not be built (0x%X, 0x%X)", route[part], route[part - 1]);
 				return 0;
+			}
 			return cost;
+		}
 		// Build normal rail
 		// Keep it doing till we go an other way
 		if (route_extra[part - 1] == 0 && route_extra[part] == 0) {
 			while (route_extra[part] == 0) {
 				// Get the current direction
 				dir = AiNew_GetRailDirection(route[part-1], route[part], route[part+1]);
 				// Is it the same as the last one?
 				if (old_dir != -1 && old_dir != dir) break;
 				old_dir = dir;
 				// Build the tile
 				res = AI_DoCommand(route[part], 0, dir, flag, CMD_BUILD_SINGLE_RAIL);
 				if (CmdFailed(res)) {
 					// Problem.. let's just abort it all!
 					p->ainew.state = AI_STATE_NOTHING;
 					return 0;
+				}
 				cost += res;
 				// Go to the next tile
 				part++;
 				// Check if it is still in range..
 				if (part >= PathFinderInfo->route_length - 1) break;
+			}
 			part--;
+		}
 		// We want to return the last position, so we go back one
 		PathFinderInfo->position = part;
 	} else {
 		// Tunnel code
 		if ((AI_PATHFINDER_FLAG_TUNNEL & route_extra[part]) != 0) {
 			cost += AI_DoCommand(route[part], 0x200, 0, flag, CMD_BUILD_TUNNEL);
 			PathFinderInfo->position++;
 			// TODO: problems!
 			if (CmdFailed(cost)) {
 				DEBUG(ai, 0, "[BuildPath] tunnel could not be built (0x%X)", route[part]);
 				return 0;
+			}
 			return cost;
+		}
 		// Bridge code
 		if ((AI_PATHFINDER_FLAG_BRIDGE & route_extra[part]) != 0) {
 			cost += AiNew_Build_Bridge(p, route[part], route[part+1], flag);
 			PathFinderInfo->position++;
 			// TODO: problems!
 			if (CmdFailed(cost)) {
 				DEBUG(ai, 0, "[BuildPath] bridge could not be built (0x%X, 0x%X)", route[part], route[part + 1]);
 				return 0;
+			}
 			return cost;
+		}
 		// Build normal road
 		// Keep it doing till we go an other way
 		// EnsureNoVehicle makes sure we don't build on a tile where a vehicle is. This way
 		//  it will wait till the vehicle is gone..
 		if (route_extra[part-1] == 0 && route_extra[part] == 0 && (flag != DC_EXEC || EnsureNoVehicle(route[part]))) {
 			while (route_extra[part] == 0 && (flag != DC_EXEC || EnsureNoVehicle(route[part]))) {
 				// Get the current direction
 				dir = AiNew_GetRoadDirection(route[part-1], route[part], route[part+1]);
 				// Is it the same as the last one?
 				if (old_dir != -1 && old_dir != dir) break;
 				old_dir = dir;
 				// There is already some road, and it is a bridge.. don't build!!!
 				if (!IsTileType(route[part], MP_TUNNELBRIDGE)) {
 					// Build the tile
 					res = AI_DoCommand(route[part], dir, 0, flag | DC_NO_WATER, CMD_BUILD_ROAD);
 					// Currently, we ignore CMD_ERRORs!
 					if (CmdFailed(res) && flag == DC_EXEC && !IsTileType(route[part], MP_STREET) && !EnsureNoVehicle(route[part])) {
 						// Problem.. let's just abort it all!
 						DEBUG(ai, 0, "[BuidPath] route building failed at tile 0x%X, aborting", route[part]);
 						p->ainew.state = AI_STATE_NOTHING;
 						return 0;
+					}
 					if (!CmdFailed(res)) cost += res;
+				}
 				// Go to the next tile
 				part++;
 				// Check if it is still in range..
 				if (part >= PathFinderInfo->route_length - 1) break;
+			}
 			part--;
 			// We want to return the last position, so we go back one
+		}
 		if (!EnsureNoVehicle(route[part]) && flag == DC_EXEC) part--;
 		PathFinderInfo->position = part;
+	}
 	return cost;
+}
 // This functions tries to find the best vehicle for this type of cargo
 // It returns INVALID_ENGINE if not suitable engine is found
 EngineID AiNew_PickVehicle(Player *p)
+{
 	if (p->ainew.tbt == AI_TRAIN) {
 		// Not supported yet
 		return INVALID_ENGINE;
 	} else {
 		EngineID best_veh_index = INVALID_ENGINE;
 		int32 best_veh_rating = 0;
 		EngineID start = ROAD_ENGINES_INDEX;
 		EngineID end   = ROAD_ENGINES_INDEX + NUM_ROAD_ENGINES;
 		EngineID i;
 		/* Loop through all road vehicles */
 		for (i = start; i != end; i++) {
 			const RoadVehicleInfo *rvi = RoadVehInfo(i);
 			const Engine* e = GetEngine(i);
 			int32 rating;
 			int32 ret;
 			/* Skip vehicles which can't take our cargo type */
 			if (rvi->cargo_type != p->ainew.cargo && !CanRefitTo(i, p->ainew.cargo)) continue;
 			// Is it availiable?
 			// Also, check if the reliability of the vehicle is above the AI_VEHICLE_MIN_RELIABILTY
 			if (!HASBIT(e->player_avail, _current_player) || e->reliability * 100 < AI_VEHICLE_MIN_RELIABILTY << 16) continue;
 			/* Rate and compare the engine by speed & capacity */
 			rating = rvi->max_speed * rvi->capacity;
 			if (rating <= best_veh_rating) continue;
 			// Can we build it?
 			ret = AI_DoCommand(0, i, 0, DC_QUERY_COST, CMD_BUILD_ROAD_VEH);
 			if (CmdFailed(ret)) continue;
 			best_veh_rating = rating;
 			best_veh_index = i;
+		}
 		return best_veh_index;
+	}
+}
 void CcAI(bool success, TileIndex tile, uint32 p1, uint32 p2)
+{
 	Player* p = GetPlayer(_current_player);
 	if (success) {
 		p->ainew.state = AI_STATE_GIVE_ORDERS;
 		p->ainew.veh_id = _new_vehicle_id;
 		if (GetVehicle(p->ainew.veh_id)->cargo_type != p->ainew.cargo) {
 			/* Cargo type doesn't match, so refit it */
 			if (CmdFailed(DoCommand(tile, p->ainew.veh_id, p->ainew.cargo, DC_EXEC, CMD_REFIT_ROAD_VEH))) {
 				/* Refit failed, so sell the vehicle */
 				DoCommand(tile, p->ainew.veh_id, 0, DC_EXEC, CMD_SELL_ROAD_VEH);
 				p->ainew.state = AI_STATE_NOTHING;
+			}
+		}
 	} else {
 		/* XXX this should be handled more gracefully */
 		p->ainew.state = AI_STATE_NOTHING;
+	}
+}
 // Builds the best vehicle possible
 int AiNew_Build_Vehicle(Player *p, TileIndex tile, byte flag)
+{
 	EngineID i = AiNew_PickVehicle(p);
 	if (i == INVALID_ENGINE) return CMD_ERROR;
 	if (p->ainew.tbt == AI_TRAIN) return CMD_ERROR;
 	if (flag & DC_EXEC) {
 		return AI_DoCommandCc(tile, i, 0, flag, CMD_BUILD_ROAD_VEH, CcAI);
 	} else {
 		return AI_DoCommand(tile, i, 0, flag, CMD_BUILD_ROAD_VEH);
+	}
+}
 int AiNew_Build_Depot(Player* p, TileIndex tile, DiagDirection direction, byte flag)
+{
 	int ret, ret2;
 	if (p->ainew.tbt == AI_TRAIN) {
 		return AI_DoCommand(tile, 0, direction, flag | DC_AUTO | DC_NO_WATER, CMD_BUILD_TRAIN_DEPOT);
 	} else {
 		ret = AI_DoCommand(tile, direction, 0, flag | DC_AUTO | DC_NO_WATER, CMD_BUILD_ROAD_DEPOT);
 		if (CmdFailed(ret)) return ret;
 		// Try to build the road from the depot
 		ret2 = AI_DoCommand(tile + TileOffsByDiagDir(direction), DiagDirToRoadBits(ReverseDiagDir(direction)), 0, flag | DC_AUTO | DC_NO_WATER, CMD_BUILD_ROAD);
 		// If it fails, ignore it..
 		if (CmdFailed(ret2)) return ret;
 		return ret + ret2;
+	}
+}

Changeset was too big and was cut off... Show full diff anyway

0 comments (0 inline, 0 general)