amroc/hds/sfcIndex.h

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// -*- C++ -*-

#ifndef _included_sfcIndex_h
#define _included_sfcIndex_h

#include "BitVec.h"
#include "DAGHDefaults.h"

#include <iosfwd>
#include <cmath>

#ifndef sfcBase
#define sfcBase (2)
#endif

class sfcIndex : public BitVec
  {
   friend std::ostream& operator<<(std::ostream&, sfcIndex const &);

   short int sfcbasew;
   short int sfcdigitw;

protected:
   short int sfcbase;
   short int sfcdim;
   short int sfclevs;

public:
   inline sfcIndex()
        : BitVec(),
          sfcbasew(0), sfcdigitw(0), 
          sfcbase(0), sfcdim(0), sfclevs(0) 
          {} 

   inline sfcIndex(const int dim, const int levs, 
                   const int base = sfcBase)
        : BitVec(levs*dim*static_cast<int>(std::ceil(
              std::log(static_cast<double>(base))/std::log(2.0)))),
          sfcbase(base), sfcdim(dim), sfclevs(levs)
     { 
         sfcbasew = static_cast<int>(std::ceil(
             std::log(static_cast<double>(base))/std::log(2.0)));
         sfcdigitw = sfcdim*sfcbasew; 
     }

   inline sfcIndex(sfcIndex const &other)
        : BitVec((BitVec const &)other),
          sfcbasew(other.sfcbasew), sfcdigitw(other.sfcdigitw),
          sfcbase(other.sfcbase), sfcdim(other.sfcdim), 
          sfclevs(other.sfclevs) 
          {}

   sfcIndex const &operator= (sfcIndex const &other);

   int operator== (sfcIndex const &other) const;
   int operator!= (sfcIndex const &other) const;
   int operator> (sfcIndex const &other) const;
   int operator< (sfcIndex const &other) const;
   int operator>= (sfcIndex const &other) const;
   int operator<= (sfcIndex const &other) const;

   /* Operations on digits; i.e. (sfcdim*sfcbasew) bits */
   int sfcGetDigit(const int level) const;
   void sfcSetDigit(const int level, const int digit);
   void sfcUnsetDigit(const int level);
   void sfcMaxDigit(const int level);

   /* Operations on base sfcbase words (sfcbasew bits) within a digit */
   void sfcSwapDigitWd(const int level, const int pos1, const int pos2);
   void sfcToggleDigitWd(const int level, const int pos);

   /* Operations on the sfcIndex */
   int sfcGetIndex() const;
   int sfcGetIndex(const int lev) const;
   int sfcGetIndex(const int lev, const int nlev) const;

   void sfcSetIndex(const int index);
   void sfcSetIndex(const int index, const int lev);
   void sfcSetIndex(const int index, const int lev, const int nlev);
   void sfcMaxIndex(const int lev);

   /* Mapping, inverse mapping routines */
   void sfcCreateLocNum(const int *coords);
   void sfcGetCoords(int *coords) const;
   void sfcGetDigitArray(int *digits) const;

   inline int sfcGetBaseW(void) const
        {return sfcbasew;}
   inline int sfcGetDigitW(void) const
        {return sfcdigitw;}

private:
   inline void sfcSetDigitBit(const int level, const int pos)
        { SetBit((level-1)*sfcdigitw + pos); }
   inline void sfcUnsetDigitBit(const int level, const int pos)
        { UnsetBit((level-1)*sfcdigitw + pos); }
   inline void sfcToggleDigitBit(const int level, const int pos)
        { ToggleBit((level-1)*sfcdigitw + pos); }

  };
 
std::ostream& operator<<(std::ostream& os, sfcIndex const &si);

#endif

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