/* $Id$ */
// Copyright (C) 2009, International Business Machines
// Corporation and others.  All Rights Reserved.
// This code is licensed under the terms of the Eclipse Public License (EPL).

#ifndef ClpCholeskyMumps_H
#define ClpCholeskyMumps_H
#include "ClpCholeskyBase.hpp"
class ClpMatrixBase;
class ClpCholeskyDense;

// unfortunately, DMUMPS_STRUC_C is an anonymous struct in MUMPS, so we define it to void for everyone outside ClpCholeskyMumps
// if this file is included by ClpCholeskyMumps.cpp, then after dmumps_c.h has been included, which defines MUMPS_VERSION
#ifndef MUMPS_VERSION
typedef void DMUMPS_STRUC_C;
#endif

/** Mumps class for Clp Cholesky factorization

*/
class ClpCholeskyMumps : public ClpCholeskyBase {

public:
  /**@name Virtual methods that the derived classes provides  */
  //@{
  /** Orders rows and saves pointer to matrix.and model.
      Returns non-zero if not enough memory */
  virtual int order(ClpInterior *model);
  /** Does Symbolic factorization given permutation.
         This is called immediately after order.  If user provides this then
         user must provide factorize and solve.  Otherwise the default factorization is used
         returns non-zero if not enough memory */
  virtual int symbolic();
  /** Factorize - filling in rowsDropped and returning number dropped.
         If return code negative then out of memory */
  virtual int factorize(const double *diagonal, int *rowsDropped);
  /** Uses factorization to solve. */
  virtual void solve(double *region);
  //@}

  /**@name Constructors, destructor */
  //@{
  /** Constructor which has dense columns activated.
         Default is off. */
  ClpCholeskyMumps(int denseThreshold = -1, int logLevel = 0);
  /** Destructor  */
  virtual ~ClpCholeskyMumps();
  /// Clone
  virtual ClpCholeskyBase *clone() const;
  //@}

private:
  // Mumps structure
  DMUMPS_STRUC_C *mumps_;

  // Copy
  ClpCholeskyMumps(const ClpCholeskyMumps &);
  // Assignment
  ClpCholeskyMumps &operator=(const ClpCholeskyMumps &);
};

#endif

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