//                                  -*- C++ -*-
/*

Copyright (C) 1996 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 2, 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, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

#if !defined (octave_LU_h)
#define octave_LU_h 1

#if defined (__GNUG__)
#pragma interface
#endif

class ostream;

#include "dMatrix.h"

class LU
{
public:

  LU (void) : l (), u (), p () { }

  LU (const Matrix& a);

  LU (const LU& a) : l (a.l), u (a.u), p (a.p) { }

  LU& operator = (const LU& a)
    {
      if (this != &a)
	{
	  l = a.l;
	  u = a.u;
	  p = a.p;
	}
      return *this;
    }

  ~LU (void) { }

  Matrix L (void) const { return l; }

  Matrix U (void) const { return u; }

  Matrix P (void) const { return p; }

  friend ostream&  operator << (ostream& os, const LU& a);

private:

  Matrix l;
  Matrix u;
  Matrix p;
};

#endif

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