Tensor.h

/*
   CheMPS2: a spin-adapted implementation of DMRG for ab initio quantum chemistry
   Copyright (C) 2013-2016 Sebastian Wouters

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License along
   with this program; if not, write to the Free Software Foundation, Inc.,
   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#ifndef TENSOR_CHEMPS2_H
#define TENSOR_CHEMPS2_H

#include "SyBookkeeper.h"

namespace CheMPS2{
   class Tensor{

      public:


         virtual int gNKappa() const = 0;


         virtual double * gStorage() = 0;


         virtual int gKappa( const int N1, const int TwoS1, const int I1, const int N2, const int TwoS2, const int I2 ) const = 0;


         virtual int gKappa2index( const int kappa ) const = 0;


         virtual double * gStorage( const int N1, const int TwoS1, const int I1, const int N2, const int TwoS2, const int I2 ) = 0;


         virtual int gIndex() const = 0;

      protected:

         int index;

         double * storage;

         int nKappa;

         int * kappa2index;

   };
}

#endif