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BoxLayout.H

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/* _______              __
  / ___/ /  ___  __ _  / /  ___
 / /__/ _ \/ _ \/  ' \/ _ \/ _ \
 \___/_//_/\___/_/_/_/_.__/\___/ 
*/
//
// This software is copyright (C) by the Lawrence Berkeley
// National Laboratory.  Permission is granted to reproduce
// this software for non-commercial purposes provided that
// this notice is left intact.
// 
// It is acknowledged that the U.S. Government has rights to
// this software under Contract DE-AC03-765F00098 between
// the U.S.  Department of Energy and the University of
// California.
//
// This software is provided as a professional and academic
// contribution for joint exchange. Thus it is experimental,
// is provided ``as is'', with no warranties of any kind
// whatsoever, no support, no promise of updates, or printed
// documentation. By using this software, you acknowledge
// that the Lawrence Berkeley National Laboratory and
// Regents of the University of California shall have no
// liability with respect to the infringement of other
// copyrights by any part of this software.
//

#ifndef BOXLAYOUT_H
#define BOXLAYOUT_H

#ifndef WRAPPER
#include "Box.H"
#include "Vector.H"
class DataIterator;
class LayoutIterator;
#include "RefCountedPtr.H"
#include "DataIndex.H"
#include "SPMD.H"
#endif /*WRAPPER*/

// This header file defines the BoxLayout oject.


class BoxLayout
{
public:
  BoxLayout();


  BoxLayout(const Vector<Box>& a_boxes,
            const Vector<int>& a_procIDs);


  virtual
  ~BoxLayout();


  BoxLayout& operator=(const BoxLayout& a_rhs);


  virtual void
  define(const Vector<Box>& a_boxes,
         const Vector<int>& a_procIDs);



  const Box&
  operator[](const LayoutIndex& it) const;

  Box&
  operator[](const LayoutIndex& it);


  inline bool
  operator==(const BoxLayout& rhs) const ;
  bool eq(const BoxLayout& rhs) const { return *this == rhs;}


  // not a user function
  bool check(const LayoutIndex& index) const
    { return index.m_layoutIntPtr == m_layout;}



  DataIndex
  addBox(const Box& box, int procID);


  virtual void
  close();


  virtual void
  deepCopy(const BoxLayout& a_source);


  Box get(const LayoutIndex& it) const;


  bool
  isClosed() const;



  bool
  isSorted() const {return isClosed();}

  /* parallel iterator.  Returns DataIndex objects that that only correspond to boxes
     on the local processor */
  DataIterator
  dataIterator() const;


  LayoutIterator
  layoutIterator() const;

#ifndef WRAPPER
  void
  print() const;
#endif
  void p() const { print();}


  unsigned int
  procID(const LayoutIndex& a_index) const ;

  /* returns the number of boxes assigned to a given procID
   */
  int numBoxes(const int procID) const;


  void
  setProcID(const LayoutIndex& a_index, unsigned int a_procID);

  inline unsigned int
  size() const ;


  //const or non-const operation ?.....I can think of usages either way...bvs

  void
  sort();


  friend void coarsen(BoxLayout& output, const BoxLayout& input, int refinement);


  friend void refine(BoxLayout& output, const BoxLayout& input, int refinement);

  struct Entry
  {
    Entry(): m_procID(::procID()){;}
    Entry(const Box& a_box)
      :box(a_box), m_procID(::procID()){}
    Entry(const Box& a_box, const unsigned int a_index)
      :box(a_box), index(a_index), m_procID(::procID()){}
    bool operator < (const Entry& rhs) const
      { return box < rhs.box;}

    Box box;
    unsigned int index;
    unsigned int m_procID;// not used in serial code.
  };

  // not a user function.  used in IO routine.
  unsigned int index(const LayoutIndex& index) const;

protected:

  void setIndexVector();
  friend class LayoutIterator;
  friend class DataIterator;

  RefCountedPtr<Vector<Entry> >        m_boxes;
  RefCountedPtr<Vector<unsigned int> > m_index;
  RefCountedPtr<int>                   m_layout;
  RefCountedPtr<bool>                  m_closed;
  RefCountedPtr<DataIterator>          m_dataIterator;

private:

};

void coarsen_bl(BoxLayout& output, const BoxLayout& input, int refinement);

void refine_bl(BoxLayout& output, const BoxLayout& input, int refinement);

#ifndef WRAPPER

inline
void coarsen_bl(BoxLayout& output, const BoxLayout& input, int refinement)
{ coarsen(output, input, refinement);}

inline
void refine_bl(BoxLayout& output, const BoxLayout& input, int refinement)
{ refine(output, input, refinement);}

//========================================================


// inlined functions
// =================


// constructors
// ============



/*
inline
BoxLayout::BoxLayout(int a_boxes)
  :m_boxes(new std::vector<Entry>(a_boxes)),
   m_index(new std::vector<unsigned int>(a_boxes)),
   m_layout(new int),
   m_closed(new bool(false))
{
  std::vector<Entry>& boxes = *m_boxes;
  std::vector<unsigned int>& index = *m_index;
  for(unsigned int i=0; i<boxes.size(); ++i)
    {
      boxes[i].index = i;
      index[i] = i;
    }
}
*/

// operators
// =========

inline const Box&
BoxLayout::operator[](const LayoutIndex& index) const
{
  assert(check(index));// make sure this LayoutIndex came from my own iterator
  return m_boxes->operator[](m_index->operator[](index.m_index)).box;
}

inline Box&
BoxLayout::operator[](const LayoutIndex& index)
{
  if(*m_closed)
    {
      MayDay::Error("attempt to modify closed BoxLayout");
    }
  assert(check(index)); // make sure this LayoutIndex came from my own iterator
  return m_boxes->operator[](m_index->operator[](index.m_index)).box;
}

inline bool
BoxLayout::operator==(const BoxLayout& rhs) const
{
  return m_boxes == rhs.m_boxes;
}


// member functions
// ================


inline  Box
BoxLayout::get(const LayoutIndex& index) const
{
  assert(check(index)); // make sure this LayoutIndex came from my own iterator
  return m_boxes->operator[](m_index->operator[](index.m_index)).box;
}

inline unsigned int
BoxLayout::index(const LayoutIndex& a_index) const
{
  return m_index->operator[](a_index.m_index);
}

inline bool
BoxLayout::isClosed() const
{
  return *m_closed;
}

inline unsigned int
BoxLayout::procID(const LayoutIndex& a_index) const
{
  assert(check(a_index));
  return m_boxes->operator[](m_index->operator[](a_index.m_index)).m_procID;
}

inline void
BoxLayout::setProcID(const LayoutIndex& a_index, unsigned int a_procID)
{
  assert(check(a_index));
  m_boxes->operator[](m_index->operator[](a_index.m_index)).m_procID = a_procID;
}

inline unsigned int
BoxLayout::size() const 
{
  return m_boxes->size();
}


// global functions
// ================

std::ostream& operator<<(std::ostream& os, const BoxLayout& a_layout);

#endif /*WRAPPER*/


#endif // DATAPLAN_H

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