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/* $Id$ */

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enum {

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	HQ_NUM_TILE = 4,

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	HQ_NUM_SIZE = 5

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};

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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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	UNMOVABLE_HQ_NORTH    = 0x80,

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	UNMOVABLE_HQ_WEST     = 0x81,

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	UNMOVABLE_HQ_EAST     = 0x82,

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	UNMOVABLE_HQ_SOUTH    = 0x83,

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	UNMOVABLE_HQ_END      = UNMOVABLE_HQ_NORTH + HQ_NUM_SIZE * HQ_NUM_TILE

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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 bool IsCompanyHQ(TileIndex t)

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{

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	return IS_INT_INSIDE(GetUnmovableType(t), UNMOVABLE_HQ_NORTH, UNMOVABLE_HQ_END);

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}

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static inline byte GetCompanyHQSize(TileIndex t)

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{

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	assert(IsTileType(t, MP_UNMOVABLE) && IsCompanyHQ(t));

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	return GB(_m[t].m5, 2, 3);

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}

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static inline byte GetCompanyHQSection(TileIndex t)

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{

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	assert(IsTileType(t, MP_UNMOVABLE) && IsCompanyHQ(t));

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	return GB(_m[t].m5, 0, 5);

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}

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static inline void EnlargeCompanyHQ(TileIndex t, byte size)

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{

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	size *= 4;

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	if (size <= _m[t].m5 - UNMOVABLE_HQ_NORTH) return;

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	_m[t + TileDiffXY(0, 0)].m5 = UNMOVABLE_HQ_NORTH + size;

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	_m[t + TileDiffXY(0, 1)].m5 = UNMOVABLE_HQ_WEST  + size;

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	_m[t + TileDiffXY(1, 0)].m5 = UNMOVABLE_HQ_EAST  + size;

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	_m[t + TileDiffXY(1, 1)].m5 = UNMOVABLE_HQ_SOUTH + size;

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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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}

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static inline void MakeCompanyHQ(TileIndex t, Owner o)

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{

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	MakeUnmovable(t + TileDiffXY(0, 0), UNMOVABLE_HQ_NORTH, o);

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	MakeUnmovable(t + TileDiffXY(0, 1), UNMOVABLE_HQ_WEST, o);

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	MakeUnmovable(t + TileDiffXY(1, 0), UNMOVABLE_HQ_EAST, o);

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	MakeUnmovable(t + TileDiffXY(1, 1), UNMOVABLE_HQ_SOUTH, o);

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}