NumVec.hpp

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/*
   Copyright (c) 2012 The Regents of the University of California,
   through Lawrence Berkeley National Laboratory.  

Authors: Lexing Ying, Mathias Jacquelin and Lin Lin

This file is part of PEXSI. All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

(1) Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
(2) Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
(3) Neither the name of the University of California, Lawrence Berkeley
National Laboratory, U.S. Dept. of Energy nor the names of its contributors may
be used to endorse or promote products derived from this software without
specific prior written permission.

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 */
#ifndef _PEXSI_NUMVEC_HPP_
#define _PEXSI_NUMVEC_HPP_

#include "environment.hpp"

namespace  PEXSI{
  template <class F> class NumVec
  {
    protected:

      inline void allocate(F* data=NULL);

      inline void deallocate();

      Int  m_;                                
      bool owndata_;                          

      F* data_;

      Int bufsize_;
    public:
      NumVec(Int m = 0);
      NumVec(Int m, bool owndata, F* data);
      NumVec(const NumVec& C);
      ~NumVec();

      NumVec& operator=(const NumVec& C);

      void Resize ( Int m );

      const F& operator()(Int i) const;  
      F& operator()(Int i);  
      const F& operator[](Int i) const;
      F& operator[](Int i);

      bool IsOwnData() const { return owndata_; }
      F*   Data() const { return data_; }
      Int  m () const { return m_; }
      Int ByteSize() const { return m_*sizeof(F);}
  };

  // Commonly used
  typedef NumVec<bool>       BolNumVec;
  typedef NumVec<Int>        IntNumVec;
  typedef NumVec<Real>       DblNumVec;
  typedef NumVec<Complex>    CpxNumVec;


  // *********************************************************************
  // Utility functions
  // *********************************************************************
  template <class F> inline void SetValue( NumVec<F>& vec, F val );

  template <class F> inline Real Energy( const NumVec<F>& vec );


} // namespace PEXSI

#include "NumVec_impl.hpp"

#endif // _PEXSI_NUMVEC_HPP_