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/* $Id$ */

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#include "stdafx.h"

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#include "openttd.h"

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#include "functions.h"

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#include "road_map.h"

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#include "station.h"

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#include "tunnel_map.h"

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RoadBits GetAnyRoadBits(TileIndex tile)

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{

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	switch (GetTileType(tile)) {

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		case MP_STREET:

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			switch (GetRoadType(tile)) {

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				default:

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				case ROAD_NORMAL:   return GetRoadBits(tile);

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				case ROAD_CROSSING: return GetCrossingRoadBits(tile);

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			}

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		case MP_STATION:

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			if (!IsRoadStationTile(tile)) return 0;

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			return DiagDirToRoadBits(GetRoadStationDir(tile));

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		case MP_TUNNELBRIDGE:

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			if (_m[tile].m5 & 0x80) {

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				// bridge

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				if (_m[tile].m5 & 0x40) {

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					// middle part

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					if ((_m[tile].m5 & 0x38) != 0x28) return 0; // no road under bridge

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					return _m[tile].m5 & 1 ? ROAD_X : ROAD_Y;

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				} else {

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					// ending

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					if (GB(_m[tile].m5, 1, 2) != TRANSPORT_ROAD) return 0; // not a road bridge

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					return _m[tile].m5 & 1 ? ROAD_Y : ROAD_X;

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				}

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			} else {

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				// tunnel

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				if (GetTunnelTransportType(tile) != TRANSPORT_ROAD) return 0;

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				return DiagDirToRoadBits(ReverseDiagDir(GetTunnelDirection(tile)));

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			}

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		default: return 0;

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	}

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}

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TrackBits GetAnyRoadTrackBits(TileIndex tile)

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{

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	uint32 r = GetTileTrackStatus(tile, TRANSPORT_ROAD);

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	return (byte)(r | (r >> 8));

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}