rtbulksort.h

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// -*- Mode: C++ -*-
//--------------------------------------------------------------------
//      RTbulksort.h
//      ------------
//      Declares the interface of the array that can be sorted 
//      as required by STR bulk loading algorithms 
//
//      Declared class:
//      RTsortArray
//
//      TPR-tree - Index for continuously moving objects
//      July 2001 release, Aalborg University
//

#ifndef RTBULKSORT_H
#define RTBULKSORT_H

#include <fstream.h>

//------------------------------------------------
//  Comparison functions - controls how data in 
//  the array is interpreted  
//

extern "C" int ComparePid           (const void *i, const void *j);
extern "C" int CompareCoord         (const void *i, const void *j);
extern "C" int CompareCoordParam    (const void *i, const void *j);
extern "C" int CompareHilbert       (const void *i, const void *j);

extern RTperiod RTparam;   // Time parameter accessible to Compare* functions 
extern int      RToffset;  // Offset added to the beginning of coords in Compare* 
                           // functions. Used to enable sorting of rectangles 
                           // augmented with their center points   

//------------------------------------------------
//    RTsortArray
//

class RTsortArray
{
public:
   RTsortArray() : data(NULL), len(0), num(0) {}
   RTsortArray(int ln, int rc_size);
   ~RTsortArray(); 

   int   GetNum () const { return  num; }
   void* operator[]   (int n) const;
   void* NewRec       ();   // Give address of a new record at the end
   void  Sort         (int (*cmpf)(const void *, const void *));
   void  HilbertSort  ();
   void  SortNTimes   (int from, int numRecs, int maxRecs, double alpha,
                       int (*cmpf)(const void *, const void *));
   //void  OrderData    (char* dataptr, int numRecs, int maxRecs, RTcoord* uexts, int j,
     //                  int (*cmpf)(const void *, const void *));
   void  ReadPoints   (ifstream& is);     // reads points from the binary stream
   void  AdjustPoints (RTperiod deltaT);  
    
private:
   int    rec_size;
   int    len;
   int    num;
   char*  data; 
};

#endif