// LinConst.h                                                -*- C++ -*-
/*

Copyright (C) 1992, 1993, 1994, 1995 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_LinConst_h)
#define octave_LinConst_h 1

#if defined (__GNUG__)
#pragma interface
#endif

class ostream;

class ColumnVector;

#include <cfloat>

#include "dMatrix.h"
#include "Bounds.h"

class LinConst : public Bounds
{
public:

  LinConst (void) : Bounds () { }
  LinConst (int nc, int n) : Bounds (nc), A (nb, n) {}

  LinConst (int eq, int ineq, int n)
    : Bounds (eq+ineq), A (nb, n) {}

  LinConst (const ColumnVector& l, const Matrix& amat, const ColumnVector& u)
    : Bounds (l, u), A (amat)
      {
	if (nb != amat.rows ())
	  error ("inconsistent sizes for constraint matrix and bounds vectors");
      }

  LinConst (const Matrix& A_eq, const ColumnVector& b_eq,
	    const Matrix& A_ineq, const ColumnVector& b_ineq);

  LinConst (const LinConst& a)
    : Bounds (a.lb, a.ub), A (a.constraint_matrix ()) {}

  LinConst& operator = (const LinConst& a)
    {
      nb = a.nb;
      lb = a.lb;
      A  = a.A;
      ub = a.ub;

      return *this;
    }

  LinConst& resize (int nclin, int n);

  Matrix constraint_matrix (void) const { return A; }

  LinConst& set_constraint_matrix (const Matrix& amat)
    {
      if (lb.capacity () != amat.rows ())
	error ("inconsistent size for new linear constraint matrix");

      A = amat;

      return *this;
    }

  Matrix eq_constraint_matrix (void) const;
  Matrix ineq_constraint_matrix (void) const;

  ColumnVector eq_constraint_vector (void) const;
  ColumnVector ineq_constraint_vector (void) const;

  friend ostream& operator << (ostream& os, const LinConst& b);

protected:

  Matrix A;

private:

  void error (const char *msg);

};

#endif

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