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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 "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.h"

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#include "yapf/yapf.h"

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#include "date.h"

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    36

#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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    39

/*

    40

 *	These command macros are used to call vehicle type specific commands with non type specific commands

    41

 *	it should be used like: DoCommandP(x, y, p1, p2, flags, CMD_STARTSTOP_VEH(v->type))

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 *	that line will start/stop a vehicle nomatter what type it is

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 *	VEH_Train is used as an offset because the vehicle type values doesn't start with 0

    44

 */

    45

    46

#define CMD_BUILD_VEH(x)		   _veh_build_proc_table[ x - VEH_Train]

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#define CMD_SELL_VEH(x)				_veh_sell_proc_table[ x - VEH_Train]

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#define CMD_REFIT_VEH(x)		   _veh_refit_proc_table[ x - VEH_Train]

    49

    50

static 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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static 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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    63

static 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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    70

    71

enum {

    72

	/* Max vehicles: 64000 (512 * 125) */

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	VEHICLES_POOL_BLOCK_SIZE_BITS = 9,       /* In bits, so (1 << 9) == 512 */

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	VEHICLES_POOL_MAX_BLOCKS      = 125,

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    76

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

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};

    78

    79

/**

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

    81

 */

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static void VehiclePoolNewBlock(uint start_item)

    83

{

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	Vehicle *v;

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    86

	/* 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. */

    88

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

    89

}

    90

    91

/* Initialize the vehicle-pool */

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MemoryPool _vehicle_pool = { "Vehicle", VEHICLES_POOL_MAX_BLOCKS, VEHICLES_POOL_BLOCK_SIZE_BITS, sizeof(Vehicle), &VehiclePoolNewBlock, NULL, 0, 0, NULL };

    93

    94

void VehicleServiceInDepot(Vehicle *v)

    95

{

    96

	v->date_of_last_service = _date;

    97

	v->breakdowns_since_last_service = 0;

    98

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

    99

}

   100

   101

bool VehicleNeedsService(const Vehicle *v)

   102

{

   103

	if (v->vehstatus & VS_CRASHED)

   104

		return false; /* Crashed vehicles don't need service anymore */

   105

   106

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

   107

		return EngineHasReplacementForPlayer(GetPlayer(v->owner), v->engine_type);  /* Vehicles set for autoreplacing needs to go to a depot even if breakdowns are turned off */

   108

	}

   109

   110

	return _patches.servint_ispercent ?

   111

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

   112

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

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}

   114

   115

StringID VehicleInTheWayErrMsg(const Vehicle* v)

   116

{

   117

	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;

   122

	}

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}

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   125

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

   126

{

   127

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

   128

		return NULL;

   129

   130

	_error_message = VehicleInTheWayErrMsg(v);

   131

	return v;

   132

}

   133

   134

bool EnsureNoVehicle(TileIndex tile)

   135

{

   136

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

   137

}

   138

   139

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

   140

{

   141

	const TileInfo *ti = data;

   142

   143

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

   144

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

   145

   146

	_error_message = VehicleInTheWayErrMsg(v);

   147

	return v;

   148

}

   149

   150

   151

bool EnsureNoVehicleOnGround(TileIndex tile)

   152

{

   153

	TileInfo ti;

   154

   155

	ti.tile = tile;

   156

	ti.z = GetTileMaxZ(tile);

   157

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

   158

}

   159

   160

Vehicle *FindVehicleOnTileZ(TileIndex tile, byte z)

   161

{

   162

	TileInfo ti;

   163

   164

	ti.tile = tile;

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	ti.z = z;

   166

   167

	return VehicleFromPos(tile, &ti, EnsureNoVehicleProcZ);

   168

}

   169

   170

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

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{

   172

	int x1 = TileX(from);

   173

	int y1 = TileY(from);

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	int x2 = TileX(to);

   175

	int y2 = TileY(to);

   176

	Vehicle *veh;

   177

   178

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

   179

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

   180

		intswap(x1,x2);

   181

		intswap(y1,y2);

   182

	}

   183

	FOR_ALL_VEHICLES(veh) {

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		if ((veh->type == VEH_Train || veh->type == VEH_Road) && (z==0xFF || veh->z_pos == z)) {

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			if ((veh->x_pos>>4) >= x1 && (veh->x_pos>>4) <= x2 &&

   186

					(veh->y_pos>>4) >= y1 && (veh->y_pos>>4) <= y2) {

   187

				return veh;

   188

			}

   189

		}

   190

	}

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	return NULL;

   192

}

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   194

   195

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

   196

   197

void VehiclePositionChanged(Vehicle *v)

   198

{

   199

	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);

   202

   203

	pt.x += spr->x_offs;

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	pt.y += spr->y_offs;

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   206

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

   207

   208

	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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   214

// Called after load to update coordinates

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void AfterLoadVehicles(void)

   216

{

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	Vehicle *v;

   218

   219

	FOR_ALL_VEHICLES(v) {

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		v->first = NULL;

   221

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

   222

	}

   223

   224

	FOR_ALL_VEHICLES(v) {

   225

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

   226

			TrainConsistChanged(v);

   227

	}

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   229

	FOR_ALL_VEHICLES(v) {

   230

		switch (v->type) {

   231

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

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			case VEH_Road: v->cur_image = GetRoadVehImage(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:

   235

				if (v->subtype == 0 || v->subtype == 2) {

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

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					if (v->next != NULL) v->next->cur_image = v->cur_image;

   238

				}

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				break;

   240

			default: break;

   241

		}

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   243

		v->left_coord = INVALID_COORD;

   244

		VehiclePositionChanged(v);

   245

	}

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}

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   248

static Vehicle *InitializeVehicle(Vehicle *v)

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{

   250

	VehicleID index = v->index;

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

   252

	v->index = index;

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   254

	assert(v->orders == NULL);

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   256

	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 = INVALID_VEHICLE;

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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;

   264

	v->random_bits = 0;

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	return v;

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}

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   268

/**

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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.

   271

 */

   272

byte VehicleRandomBits(void)

   273

{

   274

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

   275

}

   276

   277

Vehicle *ForceAllocateSpecialVehicle(void)

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{

   279

	/* 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

   282

	 * BLOCKS_FOR_SPECIAL_VEHICLES times block_size vehicles that may only

   283

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

   284

   285

	Vehicle *v;

   286

   287

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

   288

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

   289

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

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

   291

		if (v->index >= (1 << _vehicle_pool.block_size_bits) * BLOCKS_FOR_SPECIAL_VEHICLES)

   292

			return NULL;

   293

   294

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

   295

	}

   296

   297

	return NULL;

   298

}

   299

   300

/*

   301

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

   302

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

   303

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

   304

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

   305

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

   306

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

   307

 */

   308

static Vehicle *AllocateSingleVehicle(VehicleID *skip_vehicles)

   309

{

   310

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

   311

	 * first blocks */

   312

	Vehicle *v;

   313

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

   314

   315

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

   316

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

   317

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

   318

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

   319

			(*skip_vehicles)++;

   320

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

   321

		}

   322

	}

   323

   324

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

   325

	if (AddBlockToPool(&_vehicle_pool))

   326

		return AllocateSingleVehicle(skip_vehicles);

   327

   328

	return NULL;

   329

}

   330

   331

   332

Vehicle *AllocateVehicle(void)

   333

{

   334

	VehicleID counter = 0;

   335

	return AllocateSingleVehicle(&counter);

   336

}

   337

   338

   339

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

   340

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

   341

* @param num number of vehicles to allocate room for

   342

*	returns true if there is room to allocate all the vehicles

   343

*/

   344

bool AllocateVehicles(Vehicle **vl, int num)

   345

{

   346

	int i;

   347

	Vehicle *v;

   348

	VehicleID counter = 0;

   349

   350

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

   351

		v = AllocateSingleVehicle(&counter);

   352

		if (v == NULL) {

   353

			return false;

   354

		}

   355

		if (vl != NULL) {

   356

			vl[i] = v;

   357

		}

   358

	}

   359

   360

	return true;

   361

}

   362

   363

   364

static VehicleID _vehicle_position_hash[0x1000];

   365

   366

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

   367

{

   368

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

   369

   370

	// The hash area to scan

   371

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

   372

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

   373

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

   374

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

   375

   376

	int x;

   377

	int y;

   378

   379

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

   380

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

   381

			VehicleID veh = _vehicle_position_hash[(x + y) & 0xFFFF];

   382

   383

			while (veh != INVALID_VEHICLE) {

   384

				Vehicle *v = GetVehicle(veh);

   385

				void* a = proc(v, data);

   386

   387

				if (a != NULL) return a;

   388

				veh = v->next_hash;

   389

			}

   390

   391

			if (x == xu) break;

   392

		}

   393

   394

		if (y == yu) break;

   395

	}

   396

	return NULL;

   397

}

   398

   399

   400

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

   401

{

   402

	VehicleID *old_hash, *new_hash;

   403

	int old_x = v->left_coord;

   404

	int old_y = v->top_coord;

   405

	Vehicle *u;

   406

   407

	new_hash = (x == INVALID_COORD) ? NULL : &_vehicle_position_hash[GEN_HASH(x,y)];

   408

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

   409

   410

	if (old_hash == new_hash) return;

   411

   412

	/* remove from hash table? */

   413

	if (old_hash != NULL) {

   414

		Vehicle *last = NULL;

   415

		VehicleID idx = *old_hash;

   416

		while ((u = GetVehicle(idx)) != v) {

   417

			idx = u->next_hash;

   418

			assert(idx != INVALID_VEHICLE);

   419

			last = u;

   420

		}

   421

   422

		if (last == NULL) {

   423

			*old_hash = v->next_hash;

   424

		} else {

   425

			last->next_hash = v->next_hash;

   426

		}

   427

	}

   428

   429

	/* insert into hash table? */

   430

	if (new_hash != NULL) {

   431

		v->next_hash = *new_hash;

   432

		*new_hash = v->index;

   433

	}

   434

}

   435

   436

void InitializeVehicles(void)

   437

{

   438

	uint i;

   439

   440

	/* Clean the vehicle pool, and reserve enough blocks

   441

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

   442

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

   443

	CleanPool(&_vehicle_pool);

   444

	AddBlockToPool(&_vehicle_pool);

   445

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

   446

		AddBlockToPool(&_vehicle_pool);

   447

   448

	for (i = 0; i < lengthof(_vehicle_position_hash); i++) {

   449

		_vehicle_position_hash[i] = INVALID_VEHICLE;

   450

	}

   451

}

   452

   453

Vehicle *GetLastVehicleInChain(Vehicle *v)

   454

{

   455

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

   456

	return v;

   457

}

   458

   459

/** Finds the previous vehicle in a chain, by a brute force search.

   460

 * This old function is REALLY slow because it searches through all vehicles to

   461

 * find the previous vehicle, but if v->first has not been set, then this function

   462

 * will need to be used to find the previous one. This function should never be

   463

 * called by anything but GetFirstVehicleInChain

   464

 */

   465

static Vehicle *GetPrevVehicleInChain_bruteforce(const Vehicle *v)

   466

{

   467

	Vehicle *u;

   468

   469

	FOR_ALL_VEHICLES(u) if (u->type == VEH_Train && u->next == v) return u;

   470

   471

	return NULL;

   472

}

   473

   474

/** Find the previous vehicle in a chain, by using the v->first cache.

   475

 * While this function is fast, it cannot be used in the GetFirstVehicleInChain

   476

 * function, otherwise you'll end up in an infinite loop call

   477

 */

   478

Vehicle *GetPrevVehicleInChain(const Vehicle *v)

   479

{

   480

	Vehicle *u;

   481

	assert(v != NULL);

   482

   483

	u = GetFirstVehicleInChain(v);

   484

   485

	// Check to see if this is the first

   486

	if (v == u) return NULL;

   487

   488

	for (; u->next != v; u = u->next) assert(u->next != NULL);

   489

   490

	return u;

   491

}

   492