/home/coin/SVN-release/CoinAll-1.1.0/Ipopt/src/Algorithm/LinearSolvers/IpMa27TSolverInterface.hpp

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// Copyright (C) 2004, 2006 International Business Machines and others.
// All Rights Reserved.
// This code is published under the Common Public License.
//
// $Id: IpMa27TSolverInterface.hpp 832 2007-01-30 21:41:35Z andreasw $
//
// Authors:  Carl Laird, Andreas Waechter     IBM    2005-03-17

#ifndef __IPMA27TSOLVERINTERFACE_HPP__
#define __IPMA27TSOLVERINTERFACE_HPP__

#include "IpSparseSymLinearSolverInterface.hpp"

namespace Ipopt
{
  class Ma27TSolverInterface: public SparseSymLinearSolverInterface
  {
  public:
    Ma27TSolverInterface();

    virtual ~Ma27TSolverInterface();

    bool InitializeImpl(const OptionsList& options,
                        const std::string& prefix);


    virtual ESymSolverStatus InitializeStructure(Index dim, Index nonzeros,
        const Index *airn,
        const Index *ajcn);

    virtual double* GetValuesArrayPtr();

    virtual ESymSolverStatus MultiSolve(bool new_matrix,
                                        const Index* airn,
                                        const Index* ajcn,
                                        Index nrhs,
                                        double* rhs_vals,
                                        bool check_NegEVals,
                                        Index numberOfNegEVals);

    virtual Index NumberOfNegEVals() const;

    //* @name Options of Linear solver */

    virtual bool IncreaseQuality();

    virtual bool ProvidesInertia() const
    {
      return true;
    }
    EMatrixFormat MatrixFormat() const
    {
      return Triplet_Format;
    }

    static void RegisterOptions(SmartPtr<RegisteredOptions> roptions);

  private:
    Ma27TSolverInterface(const Ma27TSolverInterface&);

    void operator=(const Ma27TSolverInterface&);

    Index dim_;

    Index nonzeros_;

    Index negevals_;

    bool initialized_;
    bool pivtol_changed_;
    bool refactorize_;

    Number pivtol_;

    Number pivtolmax_;

    Number liw_init_factor_;
    Number la_init_factor_;
    Number meminc_factor_;
    bool warm_start_same_structure_;
    bool skip_inertia_check_;
    bool ignore_singularity_;

    ipfint icntl_[30];
    double cntl_[5];

    ipfint liw_;
    ipfint* iw_;

    ipfint* ikeep_;
    ipfint nsteps_;
    ipfint maxfrt_;

    ipfint la_;
    double* a_;

    bool la_increase_;
    bool liw_increase_;

    ESymSolverStatus SymbolicFactorization(const Index* airn,
                                           const Index* ajcn);

    ESymSolverStatus Factorization(const Index* airn,
                                   const Index* ajcn,
                                   bool check_NegEVals,
                                   Index numberOfNegEVals);

    ESymSolverStatus Backsolve(Index nrhs,
                               double *rhs_vals);
  };

} // namespace Ipopt
#endif

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