/*

Copyright (C) 1994-2015 John W. Eaton

This file is part of Octave.

Octave 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 3 of the License, or (at your
option) any later version.

Octave 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 Octave; see the file COPYING.  If not, see
<http://www.gnu.org/licenses/>.

*/

#if ! defined (octave_dbleQRP_h)
#define octave_dbleQRP_h 1

#include "octave-config.h"

#include <iosfwd>

#include "PermMatrix.h"
#include "dColVector.h"
#include "dMatrix.h"
#include "dRowVector.h"
#include "qr.h"

class
OCTAVE_API
QRP : public qr<Matrix>
{
public:

  typedef qr<Matrix>::type type;

  QRP (void) : qr<Matrix> (), p () { }

  QRP (const Matrix&, type = qr<Matrix>::std);

  QRP (const QRP& a) : qr<Matrix> (a), p (a.p) { }

  QRP& operator = (const QRP& a)
  {
    if (this != &a)
      {
        qr<Matrix>::operator = (a);
        p = a.p;
      }

    return *this;
  }

  ~QRP (void) { }

  void init (const Matrix&, type = qr<Matrix>::std);

  PermMatrix P (void) const { return p; }

  RowVector Pvec (void) const;

  friend std::ostream&  operator << (std::ostream&, const QRP&);

protected:

  PermMatrix p;
};

#endif