/home/vivien/public_html/.src_seldon/computation/solver/SparseCholeskyFactorisation.hxx

// Copyright (C) 2010 Marc Duruflé
//
// This file is part of the linear-algebra library Seldon,
// http://seldon.sourceforge.net/.
//
// Seldon 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.
//
// Seldon 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 Seldon. If not, see http://www.gnu.org/licenses/.


#ifndef SELDON_FILE_SPARSE_CHOLESKY_FACTORISATION_HXX


namespace Seldon
{

  template<class T>
  class SparseCholeskySolver
  {
  protected :
    int print_level;
    int type_ordering;
    IVect permutation;
    int type_solver;
    int n;
    Matrix<T, Symmetric, ArrayRowSymSparse> mat_sym;
    Vector<T> xtmp;

#ifdef SELDON_WITH_CHOLMOD
    MatrixCholmod mat_chol;
#endif

  public :
    // Available solvers.
    enum {SELDON_SOLVER, CHOLMOD};

    SparseCholeskySolver();

    void HideMessages();
    void ShowMessages();
    void ShowFullHistory();

    void Clear();

    int GetM() const;
    int GetN() const;

    int GetTypeOrdering() const;
    void SetOrdering(const IVect&);
    void SelectOrdering(int);

    void SelectDirectSolver(int);
    int GetDirectSolver();

    template<class MatrixSparse>
    void Factorize(MatrixSparse& A, bool keep_matrix = false);

    template<class TransStatus, class Vector1>
    void Solve(const TransStatus& TransA, Vector1& x);

    template<class TransStatus, class Vector1>
    void Mlt(const TransStatus& TransA, Vector1& x);

  };

} // namespace Seldon.


#define SELDON_FILE_SPARSE_CHOLESKY_FACTORISATION_HXX
#endif