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/* $Id$ */

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#include "stdafx.h"

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#include "openttd.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 "gui.h"

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#include "rail.h"

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    27

#define INVALID_COORD (-0x8000)

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#define GEN_HASH(x,y) (((x & 0x1F80)>>7) + ((y & 0xFC0)))

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    30

/*

    31

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

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 *	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

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 */

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    37

#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_STARTSTOP_VEH(x)  _veh_start_stop_proc_table[ x - VEH_Train]

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

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static uint32 const _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 uint32 const _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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static uint32 const _veh_start_stop_proc_table[] = {

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	CMD_START_STOP_TRAIN,

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	CMD_START_STOP_ROADVEH,

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	CMD_START_STOP_SHIP,

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	CMD_START_STOP_AIRCRAFT,

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};

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static uint32 const _veh_refit_proc_table[] = {

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	CMD_REFIT_RAIL_VEHICLE,

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	0,	// road vehicles can't be refitted

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	CMD_REFIT_SHIP,

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	CMD_REFIT_AIRCRAFT,

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};

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    67

    68

enum {

    69

	/* 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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    73

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

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};

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    76

/**

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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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{

    81

	Vehicle *v;

    82

    83

	FOR_ALL_VEHICLES_FROM(v, start_item)

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		v->index = start_item++;

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}

    86

    87

/* Initialize the vehicle-pool */

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

    89

    90

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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}

    96

    97

bool VehicleNeedsService(const Vehicle *v)

    98

{

    99

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

   100

		return false;

   101

   102

	if (v->vehstatus & VS_CRASHED)

   103

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

   104

   105

	return _patches.servint_ispercent ?

   106

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

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

   108

}

   109

   110

void VehicleInTheWayErrMsg(Vehicle *v)

   111

{

   112

	StringID id;

   113

   114

	(id = STR_8803_TRAIN_IN_THE_WAY,v->type == VEH_Train) ||

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	(id = STR_9000_ROAD_VEHICLE_IN_THE_WAY,v->type == VEH_Road) ||

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	(id = STR_A015_AIRCRAFT_IN_THE_WAY,v->type == VEH_Aircraft) ||

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		(id = STR_980E_SHIP_IN_THE_WAY, true);

   118

   119

	_error_message = id;

   120

}

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   122

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

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{

   124

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

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		return NULL;

   126

   127

	VehicleInTheWayErrMsg(v);

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	return v;

   129

}

   130

   131

bool EnsureNoVehicle(TileIndex tile)

   132

{

   133

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

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}

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   136

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

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{

   138

	const TileInfo *ti = data;

   139

   140

	if (v->tile != ti->tile || v->z_pos != ti->z || v->type == VEH_Disaster)

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		return NULL;

   142

   143

	VehicleInTheWayErrMsg(v);

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	return v;

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}

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   147

static inline uint Correct_Z(uint tileh)

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{

   149

	// needs z correction for slope-type graphics that have the NORTHERN tile lowered

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	// 1, 2, 3, 4, 5, 6 and 7

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	return CorrectZ(tileh) ? 8 : 0;

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}

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   154

uint GetCorrectTileHeight(TileIndex tile)

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{

   156

	return Correct_Z(GetTileSlope(tile, NULL));

   157

}

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   159

bool EnsureNoVehicleZ(TileIndex tile, byte z)

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{

   161

	TileInfo ti;

   162

   163

	FindLandscapeHeightByTile(&ti, tile);

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	ti.z = z + Correct_Z(ti.tileh);

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   166

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

   167

}

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   169

Vehicle *FindVehicleOnTileZ(TileIndex tile, byte z)

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{

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	TileInfo ti;

   172

   173

	ti.tile = tile;

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	ti.z = z;

   175

   176

	return VehicleFromPos(tile, &ti, EnsureNoVehicleProcZ);

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}

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   179

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

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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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   187

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

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

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		intswap(x1,x2);

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		intswap(y1,y2);

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	}

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	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 &&

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

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				return veh;

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			}

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		}

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	}

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	return NULL;

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}

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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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   209

	pt.x += spr->x_offs;

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	pt.y += spr->y_offs;

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   212

	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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// Called after load to update coordinates

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void AfterLoadVehicles(void)

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{

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	Vehicle *v;

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   225

	FOR_ALL_VEHICLES(v) {

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		v->first = NULL;

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		if (v->type != 0) {

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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_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:

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					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) {

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							v->next->cur_image = v->cur_image;

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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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   246

			if (v->type == VEH_Train && (v->subtype == TS_Front_Engine || v->subtype == TS_Free_Car))

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				TrainConsistChanged(v);

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		}

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	}

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}

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   252

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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   258

	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 = 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;

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	/* random_bits is used to pick out a random sprite for vehicles

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	    which are technical the same (newgrf stuff).

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	   Because RandomRange() results in desyncs, and because it does

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	    not really matter that one client has other visual vehicles than

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	    the other, it can be InteractiveRandomRange() without any problem

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	*/

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	v->random_bits = InteractiveRandomRange(256);

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	return v;

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}

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Vehicle *ForceAllocateSpecialVehicle(void)

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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 :) */

   285

   286

	Vehicle *v;

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   288

	FOR_ALL_VEHICLES(v) {

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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;

   292

   293

		if (v->type == 0)

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			return InitializeVehicle(v);

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	}

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   297

	return NULL;

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}

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   309

{

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

   311

	 * first blocks */

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	Vehicle *v;

   314

   321

	}

   322

   323

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

   324

	if (AddBlockToPool(&_vehicle_pool))

   326

   327

	return NULL;

   328

}

   329

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

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

   340

*/

   341

bool AllocateVehicles(Vehicle **vl, int num)

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{

   343

	int i;

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	Vehicle *v;

   346

   347

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

   349

		if (v == NULL) {

   351

		}

   355

	}

   356

   358

}

   359

   360

   361

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

   362

{

   363

	int x,y,x2,y2;

   364

	VehicleID veh;

   365

	Point pt = RemapCoords(TileX(tile) * 16, TileY(tile) * 16, 0);

   366

   367

	x2 = ((pt.x + 104) & 0x1F80) >> 7;

   368

	x  = ((pt.x - 174) & 0x1F80) >> 7;

   369

   370

	y2 = ((pt.y + 56) & 0xFC0);

   371

	y  = ((pt.y - 294) & 0xFC0);

   372

   373

	for(;;) {

   374

		int xb = x;

   375

		for(;;) {

   376

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

   377

			while (veh != INVALID_VEHICLE) {

   378

				Vehicle *v = GetVehicle(veh);

   379

				void *a;

   380

   381

				if ((a = proc(v, data)) != NULL)

   382

					return a;

   383

				veh = v->next_hash;

   384

			}

   385

   386

			if (x == x2)

   387

				break;

   388

   389

			x = (x + 1) & 0x3F;

   390

		}

   391

		x = xb;

   392

   393

		if (y == y2)

   394

			break;

   395

   396

		y = (y + 0x40) & ((0x3F) << 6);

   397

	}

   398

	return NULL;

   399

}

   400

   401

   402

   403

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

   404

{

   405

	VehicleID *old_hash, *new_hash;

   406

	int old_x = v->left_coord;

   407

	int old_y = v->top_coord;

   408

	Vehicle *u;

   409

   410

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

   411

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

   412

   413

	if (old_hash == new_hash)

   414

		return;

   415

   416

	/* remove from hash table? */

   417

	if (old_hash != NULL) {

   418

		Vehicle *last = NULL;

   419

		VehicleID idx = *old_hash;

   420

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

   421

			idx = u->next_hash;

   422

			assert(idx != INVALID_VEHICLE);

   423

			last = u;

   424

		}

   425

   426

		if (last == NULL)

   427

			*old_hash = v->next_hash;

   428

		else

   429

			last->next_hash = v->next_hash;

   430

	}

   431

   432

	/* insert into hash table? */

   433

	if (new_hash != NULL) {

   434

		v->next_hash = *new_hash;

   435

		*new_hash = v->index;

   436

	}

   437

}

   438

   439

void InitializeVehicles(void)

   440

{

   441

	int i;

   442

   443

	/* Clean the vehicle pool, and reserve enough blocks

   444

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

   445

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

   446

	CleanPool(&_vehicle_pool);

   447

	AddBlockToPool(&_vehicle_pool);

   448

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

   449

		AddBlockToPool(&_vehicle_pool);

   450

   451

	// clear it...

   452

	memset(_vehicle_position_hash, -1, sizeof(_vehicle_position_hash));

   453

}

   454

   455

Vehicle *GetLastVehicleInChain(Vehicle *v)

   456

{

   457

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

   458

	return v;

   459

}

   460

   461

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

   462

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

   463

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

   464

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

   465

 * called by anything but GetFirstVehicleInChain

   466

 */

   467

static Vehicle *GetPrevVehicleInChain_bruteforce(const Vehicle *v)

   468

{

   469

	Vehicle *u;

   470

   471

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

   472

   473

	return NULL;

   474

}

   475

   476

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

   477

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

   478

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

   479

 */

   480

Vehicle *GetPrevVehicleInChain(const Vehicle *v)

   481

{

   482

	Vehicle *u;

   483

	assert(v != NULL);

   484

   485

	u = GetFirstVehicleInChain(v);

   486

   487

 	// Check to see if this is the first

   488

	if (v == u) return NULL;

   489

   490

	do {

   491

		if (u->next == v) return u;

   492

	} while ( ( u = u->next) != NULL);

   493

   494

	return NULL;

   495

}

   496

   497

/** Finds the first vehicle in a chain.

   498

 * This function reads out the v->first cache. Should the cache be dirty,

   499

 * it determines the first vehicle in a chain, and updates the cache.