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extern int RTreeSearch(struct Node *, struct Rect *, SearchHitCallback,
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extern int RTreeInsertRect(struct Rect *, int, struct Node **, int depth);
82
extern int RTreeInsertRect1(struct Rect *, struct Node *, struct Node **, int depth);
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extern int RTreeDeleteRect(struct Rect *, int, struct Node **);
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extern struct Node *RTreeNewIndex(void);
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extern struct Node *RTreeNewNode(void);
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extern void RTreeInitNode(struct Node *);