ifp_BlockVec.h

/*@HEADER
// ***********************************************************************
// 
//       Ifpack: Object-Oriented Algebraic Preconditioner Package
//                 Copyright (2002) Sandia Corporation
// 
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
// 
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//  
// This library 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
// Lesser General Public License for more details.
//  
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA
// Questions? Contact Michael A. Heroux (maherou@sandia.gov) 
// 
// ***********************************************************************
//@HEADER
*/

#ifndef _IFP_BLOCKVEC_H_
#define _IFP_BLOCKVEC_H_

#include <stdlib.h>
#ifndef NULL
#define NULL 0
#endif
#ifdef DEBUG
#include <assert.h>
#endif

class ifp_BlockVec
{
private:
    double *base;
    const int *partit;
    int owndata;

public:
    double *v;
    int     dim0;
    int     dim1;
    int     ld;
    int     size0;

    ifp_BlockVec& operator()(int i)
    {
#ifdef DEBUG
            assert(partit != NULL);
            assert(partit[i] < partit[i+1]);
            assert(partit[i+1] <= dim0);
#endif
        v = base + partit[i];
        size0 = partit[i+1] - partit[i];
        return *this;
    }

    ifp_BlockVec(int nr, int nc, const double *a, int lda, 
                 const int *partitioning)
    {
        dim0 = nr;
        dim1 = nc;
        ld = lda;
    size0 = nr;
        base = (double *)a;
        v = (double *)a;
        partit = partitioning;
    owndata = 0;
    }

    ifp_BlockVec(const ifp_BlockVec& A);
    ifp_BlockVec(const ifp_BlockVec& A, int i);

   ~ifp_BlockVec()
    {
    if (owndata)
        delete [] base;
    base = NULL;
    }

    void VecCopy(const ifp_BlockVec& A);
    void VecSetToZero();

    void BlockCopy(const ifp_BlockVec& A);
    void BlockSetToZero();
};

#endif // _IFP_BLOCKVEC_H_

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