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/* $Id$ */

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#include "stdafx.h"

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#include "openttd.h"

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#include "road_map.h"

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#include "roadveh.h"

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#include "ship.h"

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#include "spritecache.h"

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#include "table/sprites.h"

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#include "table/strings.h"

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#include "functions.h"

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#include "map.h"

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#include "tile.h"

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#include "vehicle.h"

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#include "gfx.h"

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#include "viewport.h"

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#include "news.h"

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#include "command.h"

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#include "saveload.h"

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#include "player.h"

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#include "engine.h"

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#include "sound.h"

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#include "debug.h"

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#include "vehicle_gui.h"

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#include "depot.h"

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#include "station.h"

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#include "rail.h"

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#include "train.h"

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#include "aircraft.h"

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#include "industry_map.h"

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#include "station_map.h"

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#include "water_map.h"

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#include "network/network.h"

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#include "yapf/yapf.h"

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#include "date.h"

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#include "newgrf_callbacks.h"

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#include "newgrf_engine.h"

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#include "newgrf_sound.h"

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#include "helpers.hpp"

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    46

#define INVALID_COORD (-0x8000)

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#define GEN_HASH(x, y) ((GB((y), 6, 6) << 6) + GB((x), 7, 6))

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    49

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/* Tables used in vehicle.h to find the right command for a certain vehicle type */

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const uint32 _veh_build_proc_table[] = {

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	CMD_BUILD_RAIL_VEHICLE,

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	CMD_BUILD_ROAD_VEH,

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	CMD_BUILD_SHIP,

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	CMD_BUILD_AIRCRAFT,

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};

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const uint32 _veh_sell_proc_table[] = {

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	CMD_SELL_RAIL_WAGON,

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	CMD_SELL_ROAD_VEH,

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	CMD_SELL_SHIP,

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	CMD_SELL_AIRCRAFT,

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};

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const uint32 _veh_refit_proc_table[] = {

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	CMD_REFIT_RAIL_VEHICLE,

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	CMD_REFIT_ROAD_VEH,

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	CMD_REFIT_SHIP,

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	CMD_REFIT_AIRCRAFT,

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};

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const uint32 _send_to_depot_proc_table[] = {

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	CMD_SEND_TRAIN_TO_DEPOT,

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	CMD_SEND_ROADVEH_TO_DEPOT,

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	CMD_SEND_SHIP_TO_DEPOT,

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	CMD_SEND_AIRCRAFT_TO_HANGAR,

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};

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enum {

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	BLOCKS_FOR_SPECIAL_VEHICLES   = 2, ///< Blocks needed for special vehicles

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};

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    83

/**

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 * Called if a new block is added to the vehicle-pool

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 */

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static void VehiclePoolNewBlock(uint start_item)

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{

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	Vehicle *v;

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    90

	/* We don't use FOR_ALL here, because FOR_ALL skips invalid items.

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	 * TODO - This is just a temporary stage, this will be removed. */

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	for (v = GetVehicle(start_item); v != NULL; v = (v->index + 1U < GetVehiclePoolSize()) ? GetVehicle(v->index + 1) : NULL) {

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		v->index = start_item++;

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	}

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}

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    98

/* Initialize the vehicle-pool */

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DEFINE_OLD_POOL(Vehicle, Vehicle, VehiclePoolNewBlock, NULL)

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   101

void VehicleServiceInDepot(Vehicle *v)

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{

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	v->date_of_last_service = _date;

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	v->breakdowns_since_last_service = 0;

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	v->reliability = GetEngine(v->engine_type)->reliability;

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	InvalidateWindow(WC_VEHICLE_DETAILS, v->index); // ensure that last service date and reliability are updated

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}

   108

   109

bool VehicleNeedsService(const Vehicle *v)

   110

{

   111

	if (v->vehstatus & VS_CRASHED)

   113

   114

	if (_patches.no_servicing_if_no_breakdowns && _opt.diff.vehicle_breakdowns == 0) {

   116

	}

   117

   118

	return _patches.servint_ispercent ?

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		(v->reliability < GetEngine(v->engine_type)->reliability * (100 - v->service_interval) / 100) :

   120

		(v->date_of_last_service + v->service_interval < _date);

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}

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   123

StringID VehicleInTheWayErrMsg(const Vehicle* v)

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{

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	switch (v->type) {

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		case VEH_TRAIN:    return STR_8803_TRAIN_IN_THE_WAY;

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		case VEH_ROAD:     return STR_9000_ROAD_VEHICLE_IN_THE_WAY;

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		case VEH_AIRCRAFT: return STR_A015_AIRCRAFT_IN_THE_WAY;

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		default:           return STR_980E_SHIP_IN_THE_WAY;

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	}

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}

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   133

static void *EnsureNoVehicleProc(Vehicle *v, void *data)

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{

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	if (v->tile != *(const TileIndex*)data || v->type == VEH_DISASTER)

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		return NULL;

   137

   138

	_error_message = VehicleInTheWayErrMsg(v);

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	return v;

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}

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   142

bool EnsureNoVehicle(TileIndex tile)

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{

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	return VehicleFromPos(tile, &tile, EnsureNoVehicleProc) == NULL;

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}

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   147

static void *EnsureNoVehicleProcZ(Vehicle *v, void *data)

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{

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	const TileInfo *ti = (const TileInfo*)data;

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   151

	if (v->tile != ti->tile || v->type == VEH_DISASTER) return NULL;

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	if (v->z_pos > ti->z) return NULL;

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   154

	_error_message = VehicleInTheWayErrMsg(v);

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	return v;

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}

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   158

   159

bool EnsureNoVehicleOnGround(TileIndex tile)

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{

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	TileInfo ti;

   162

   163

	ti.tile = tile;

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	ti.z = GetTileMaxZ(tile);

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	return VehicleFromPos(tile, &ti, EnsureNoVehicleProcZ) == NULL;

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}

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   168

Vehicle *FindVehicleOnTileZ(TileIndex tile, byte z)

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{

   170

	TileInfo ti;

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   172

	ti.tile = tile;

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	ti.z = z;

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   175

	return (Vehicle*)VehicleFromPos(tile, &ti, EnsureNoVehicleProcZ);

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}

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   178

Vehicle *FindVehicleBetween(TileIndex from, TileIndex to, byte z, bool without_crashed)

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{

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	int x1 = TileX(from);

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	int y1 = TileY(from);

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	int x2 = TileX(to);

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	int y2 = TileY(to);

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	Vehicle *veh;

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   186

	/* Make sure x1 < x2 or y1 < y2 */

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	if (x1 > x2 || y1 > y2) {

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		Swap(x1, x2);

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		Swap(y1, y2);

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	}

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	FOR_ALL_VEHICLES(veh) {

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		if (without_crashed && (veh->vehstatus & VS_CRASHED) != 0) continue;

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				return veh;

   197

			}

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		}

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	}

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	return NULL;

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}

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   204

static void UpdateVehiclePosHash(Vehicle* v, int x, int y);

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   206

void VehiclePositionChanged(Vehicle *v)

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{

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	int img = v->cur_image;

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	Point pt = RemapCoords(v->x_pos + v->x_offs, v->y_pos + v->y_offs, v->z_pos);

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	const Sprite* spr = GetSprite(img);

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   212

	pt.x += spr->x_offs;

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	pt.y += spr->y_offs;

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   215

	UpdateVehiclePosHash(v, pt.x, pt.y);

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	v->left_coord = pt.x;

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	v->top_coord = pt.y;

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	v->right_coord = pt.x + spr->width + 2;

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	v->bottom_coord = pt.y + spr->height + 2;

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}

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   224

void AfterLoadVehicles()

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{

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	Vehicle *v;

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   228

	FOR_ALL_VEHICLES(v) {

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		v->first = NULL;

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		if (v->type == VEH_TRAIN) v->u.rail.first_engine = INVALID_ENGINE;

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	}

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   235

	FOR_ALL_VEHICLES(v) {

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		if (v->type == VEH_TRAIN && (IsFrontEngine(v) || IsFreeWagon(v)))

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			TrainConsistChanged(v);

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	}

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   240

	FOR_ALL_VEHICLES(v) {

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		switch (v->type) {

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			case VEH_TRAIN: v->cur_image = GetTrainImage(v, v->direction); break;

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			case VEH_SHIP: v->cur_image = GetShipImage(v, v->direction); break;

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			case VEH_AIRCRAFT:

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				if (IsNormalAircraft(v)) {

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					v->cur_image = GetAircraftImage(v, v->direction);

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					/* The plane's shadow will have the same image as the plane */

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					Vehicle *shadow = v->next;

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					shadow->cur_image = v->cur_image;

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					/* In the case of a helicopter we will update the rotor sprites */

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					if (v->subtype == AIR_HELICOPTER) {

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						Vehicle *rotor = shadow->next;

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						rotor->cur_image = GetRotorImage(v);

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					}

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				}

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				break;

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			default: break;

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		}

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		v->left_coord = INVALID_COORD;

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		VehiclePositionChanged(v);

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	}

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}

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static Vehicle *InitializeVehicle(Vehicle *v)

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{

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	VehicleID index = v->index;

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	memset(v, 0, sizeof(Vehicle));

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	v->index = index;

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	assert(v->orders == NULL);

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	v->left_coord = INVALID_COORD;

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	v->first = NULL;

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	v->next = NULL;

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	v->next_hash = NULL;

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	v->string_id = 0;

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	v->next_shared = NULL;

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	v->prev_shared = NULL;

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	v->depot_list  = NULL;

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	v->random_bits = 0;

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	return v;

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}

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/**

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 * Get a value for a vehicle's random_bits.

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 * @return A random value from 0 to 255.

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 */

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byte VehicleRandomBits()

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{

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	return GB(Random(), 0, 8);

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}

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Vehicle *ForceAllocateSpecialVehicle()

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{

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	/* This stays a strange story.. there should always be room for special

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	 * vehicles (special effects all over the map), but with 65k of vehicles

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	 * is this realistic to double-check for that? For now we just reserve

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	 * BLOCKS_FOR_SPECIAL_VEHICLES times block_size vehicles that may only

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	 * be used for special vehicles.. should work nicely :) */

   314

   315

	Vehicle *v;

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	/* We don't use FOR_ALL here, because FOR_ALL skips invalid items.

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	 * TODO - This is just a temporary stage, this will be removed. */

   319

	for (v = GetVehicle(0); v != NULL; v = (v->index + 1U < GetVehiclePoolSize()) ? GetVehicle(v->index + 1) : NULL) {

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		/* No more room for the special vehicles, return NULL */

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		if (v->index >= (1 << Vehicle_POOL_BLOCK_SIZE_BITS) * BLOCKS_FOR_SPECIAL_VEHICLES)

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			return NULL;

   323

   324

		if (!IsValidVehicle(v)) return InitializeVehicle(v);

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	}

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	return NULL;

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}

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 * finds a free vehicle in the memory or allocates a new one

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 * returns a pointer to the first free vehicle or NULL if all vehicles are in use

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 * *skip_vehicles is an offset to where in the array we should begin looking

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 * this is to avoid looping though the same vehicles more than once after we learned that they are not free

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 * this feature is used by AllocateVehicles() since it need to allocate more than one and when

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 * another block is added to _Vehicle_pool, since we only do that when we know it's already full

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 */

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static Vehicle *AllocateSingleVehicle(VehicleID *skip_vehicles)

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{

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	/* See note by ForceAllocateSpecialVehicle() why we skip the

   341

	 * first blocks */

   342

	Vehicle *v;

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	const int offset = (1 << Vehicle_POOL_BLOCK_SIZE_BITS) * BLOCKS_FOR_SPECIAL_VEHICLES;

   344

   345

	/* We don't use FOR_ALL here, because FOR_ALL skips invalid items.

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	if (*skip_vehicles < (_Vehicle_pool.total_items - offset)) { // make sure the offset in the array is not larger than the array itself

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		for (v = GetVehicle(offset + *skip_vehicles); v != NULL; v = (v->index + 1U < GetVehiclePoolSize()) ? GetVehicle(v->index + 1) : NULL) {

   349

			(*skip_vehicles)++;

   350

			if (!IsValidVehicle(v)) return InitializeVehicle(v);

   351

		}

   352

	}

   353

   354

	/* Check if we can add a block to the pool */

   355

	if (AddBlockToPool(&_Vehicle_pool))

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		return AllocateSingleVehicle(skip_vehicles);

   357

   358

	return NULL;

   359

}

   360

   361

   362

Vehicle *AllocateVehicle()

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{

   364

	VehicleID counter = 0;

   365

	return AllocateSingleVehicle(&counter);

   366

}

   367

   368

   369

/** Allocates a lot of vehicles and frees them again

   370

 * @param vl pointer to an array of vehicles to get allocated. Can be NULL if the vehicles aren't needed (makes it test only)

   371

 * @param num number of vehicles to allocate room for

   372

 * @return true if there is room to allocate all the vehicles

   373

 */

   374

bool AllocateVehicles(Vehicle **vl, int num)

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{

   376

	int i;

   377

	Vehicle *v;

   378

	VehicleID counter = 0;

   379

   380

	for (i = 0; i != num; i++) {

   381

		v = AllocateSingleVehicle(&counter);

   382

		if (v == NULL) {

   383

			return false;

   384

		}

   385

		if (vl != NULL) {

   386

			vl[i] = v;

   387

		}

   388

	}

   389

   390

	return true;

   391

}

   392

   393

   394

static Vehicle *_vehicle_position_hash[0x1000];

   395

   396

void *VehicleFromPos(TileIndex tile, void *data, VehicleFromPosProc *proc)

   397

{

   398

	Point pt = RemapCoords(TileX(tile) * TILE_SIZE, TileY(tile) * TILE_SIZE, 0);

   399

   401

	const int xl = GB(pt.x - 174, 7, 6);

   402

	const int xu = GB(pt.x + 104, 7, 6);

   403

	const int yl = GB(pt.y - 294, 6, 6) << 6;

   404

	const int yu = GB(pt.y +  56, 6, 6) << 6;

   405

   406

	int x;

   407

	int y;

   408

   409

	for (y = yl;; y = (y + (1 << 6)) & (0x3F << 6)) {

   410

		for (x = xl;; x = (x + 1) & 0x3F) {

   411

			Vehicle *v = _vehicle_position_hash[(x + y) & 0xFFFF];

   412

   413

			while (v != NULL) {

   414

				void* a = proc(v, data);

   415

   416

				if (a != NULL) return a;

   417

				v = v->next_hash;

   418

			}

   419

   420

			if (x == xu) break;

   421

		}

   422

   423

		if (y == yu) break;

   424

	}

   425

	return NULL;

   426

}

   427

   428

   429

static void UpdateVehiclePosHash(Vehicle* v, int x, int y)

   430

{

   431

	Vehicle **old_hash, **new_hash;

   432

	int old_x = v->left_coord;

   433

	int old_y = v->top_coord;

   434

   436

	old_hash = (old_x == INVALID_COORD) ? NULL : &_vehicle_position_hash[GEN_HASH(old_x, old_y)];

   437

   438

	if (old_hash == new_hash) return;

   439

   440

	/* remove from hash table? */

   441

	if (old_hash != NULL) {

   442

		Vehicle *last = NULL;

   443

		Vehicle *u = *old_hash;

   444

		while (u != v) {

   445

			last = u;

   446

			u = u->next_hash;

   447

			assert(u != NULL);

   448

		}

   449

   450

		if (last == NULL) {

   451

			*old_hash = v->next_hash;

   452

		} else {

   453

			last->next_hash = v->next_hash;

   454

		}

   455

	}

   456

   457

	/* insert into hash table? */

   458

	if (new_hash != NULL) {

   459

		v->next_hash = *new_hash;

   460

		*new_hash = v;

   461

	}

   462

}

   463

   464

void ResetVehiclePosHash()

   465

{

   466

	memset(_vehicle_position_hash, 0, sizeof(_vehicle_position_hash));

   467

}

   468

   469

void InitializeVehicles()

   470

{

   471

	uint i;

   472

   473

	/* Clean the vehicle pool, and reserve enough blocks

   474

	 *  for the special vehicles, plus one for all the other

   475

	 *  vehicles (which is increased on-the-fly) */

   476

	CleanPool(&_Vehicle_pool);

   477

	AddBlockToPool(&_Vehicle_pool);

   478

	for (i = 0; i < BLOCKS_FOR_SPECIAL_VEHICLES; i++) {

   479

		AddBlockToPool(&_Vehicle_pool);

   480

	}

   481

   482

	ResetVehiclePosHash();

   483

}

   484

   485

Vehicle *GetLastVehicleInChain(Vehicle *v)

   486

{

   487

	while (v->next != NULL) v = v->next;

   488

	return v;