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/* $Id$ */

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typedef enum UnmovableType {

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	UNMOVABLE_TRANSMITTER = 0,

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	UNMOVABLE_LIGHTHOUSE  = 1,

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	UNMOVABLE_STATUE      = 2,

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	UNMOVABLE_OWNED_LAND  = 3

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} UnmovableType;

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static inline UnmovableType GetUnmovableType(TileIndex t)

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{

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	assert(IsTileType(t, MP_UNMOVABLE));

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	return _m[t].m5;

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}

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static inline bool IsTransmitterTile(TileIndex t)

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{

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	return

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		IsTileType(t, MP_UNMOVABLE) &&

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		GetUnmovableType(t) == UNMOVABLE_TRANSMITTER;

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}

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static inline bool IsOwnedLand(TileIndex t)

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{

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	assert(IsTileType(t, MP_UNMOVABLE));

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	return GetUnmovableType(t) == UNMOVABLE_OWNED_LAND;

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}

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static inline bool IsOwnedLandTile(TileIndex t)

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{

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	return IsTileType(t, MP_UNMOVABLE) && IsOwnedLand(t);

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}

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static inline void MakeUnmovable(TileIndex t, UnmovableType u, Owner o)

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{

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	SetTileType(t, MP_UNMOVABLE);

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	SetTileOwner(t, o);

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	_m[t].m2 = 0;

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	_m[t].m3 = 0;

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	_m[t].m4 = 0;

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	_m[t].m5 = u;

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}

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static inline void MakeTransmitter(TileIndex t)

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{

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	MakeUnmovable(t, UNMOVABLE_TRANSMITTER, OWNER_NONE);

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}

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static inline void MakeLighthouse(TileIndex t)

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{

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	MakeUnmovable(t, UNMOVABLE_LIGHTHOUSE, OWNER_NONE);

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}

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static inline void MakeStatue(TileIndex t, Owner o)

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{

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	MakeUnmovable(t, UNMOVABLE_STATUE, o);

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}

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static inline void MakeOwnedLand(TileIndex t, Owner o)

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{

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	MakeUnmovable(t, UNMOVABLE_OWNED_LAND, o);

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}