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/* $Id$ */

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#include "macros.h"

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typedef enum TreeType {

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	TR_INVALID      = -1,

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	TR_TEMPERATE    = 0,

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	TR_SUB_ARCTIC   = 12,

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	TR_RAINFOREST   = 20,

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	TR_CACTUS       = 27,

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	TR_SUB_TROPICAL = 28,

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	TR_TOYLAND      = 32

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} TreeType;

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enum {

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	TR_COUNT_TEMPERATE    = TR_SUB_ARCTIC   - TR_TEMPERATE,

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	TR_COUNT_SUB_ARCTIC   = TR_RAINFOREST   - TR_SUB_ARCTIC,

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	TR_COUNT_RAINFOREST   = TR_CACTUS       - TR_RAINFOREST,

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	TR_COUNT_SUB_TROPICAL = TR_SUB_TROPICAL - TR_CACTUS,

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	TR_COUNT_TOYLAND      = 9

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};

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/* ground type, m2 bits 4...5

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 * valid densities (bits 6...7) in comments after the enum */

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typedef enum TreeGround {

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	TR_GRASS       = 0, // 0

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	TR_ROUGH       = 1, // 0

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	TR_SNOW_DESERT = 2  // 0-3 for snow, 3 for desert

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} TreeGround;

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static inline TreeType GetTreeType(TileIndex t) { return _m[t].m3; }

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static inline void SetTreeType(TileIndex t, TreeType r) { _m[t].m3 = r; }

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static inline TreeGround GetTreeGround(TileIndex t) { return GB(_m[t].m2, 4, 2); }

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static inline uint GetTreeDensity(TileIndex t) { return GB(_m[t].m2, 6, 2); }

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static inline void SetTreeGroundDensity(TileIndex t, TreeGround g, uint d)

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{

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	SB(_m[t].m2, 4, 2, g);

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	SB(_m[t].m2, 6, 2, d);

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}

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static inline void AddTreeCount(TileIndex t, int c) { _m[t].m5 += c << 6; }

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static inline uint GetTreeCount(TileIndex t) { return GB(_m[t].m5, 6, 2); }

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static inline void SetTreeCount(TileIndex t, uint c) { SB(_m[t].m5, 6, 2, c); }

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static inline void AddTreeGrowth(TileIndex t, int a) { _m[t].m5 += a; }

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static inline uint GetTreeGrowth(TileIndex t) { return GB(_m[t].m5, 0, 3); }

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static inline void SetTreeGrowth(TileIndex t, uint g) { SB(_m[t].m5, 0, 3, g); }

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static inline void AddTreeCounter(TileIndex t, int a) { _m[t].m2 += a; }

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static inline uint GetTreeCounter(TileIndex t) { return GB(_m[t].m2, 0, 4); }

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static inline void SetTreeCounter(TileIndex t, uint c) { SB(_m[t].m2, 0, 4, c); }

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static inline void MakeTree(TileIndex t, TreeType type, uint count, uint growth, TreeGround ground, uint density)

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{

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	SetTileType(t, MP_TREES);

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	SetTileOwner(t, OWNER_NONE);

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	_m[t].m2 = density << 6 | ground << 4 | 0;

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	_m[t].m3 = type;

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	_m[t].m4 = 0 << 5 | 0 << 2;

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	_m[t].m5 = count << 6 | growth;

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}

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#endif