/* -*- C++ -*-

  * src/lemon/maps.h - Part of LEMON, a generic C++ optimization library

  *

  * Copyright (C) 2005 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

  * (Egervary Combinatorial Optimization Research Group, EGRES).

  *

  * Permission to use, modify and distribute this software is granted

  * provided that this copyright notice appears in all copies. For

  * precise terms see the accompanying LICENSE file.

  *

  * This software is provided "AS IS" with no warranty of any kind,

  * express or implied, and with no claim as to its suitability for any

  * purpose.

  *

  */

 #ifndef LEMON_LP_BASE_H

 #define LEMON_LP_BASE_H

 ///\file

 ///\brief The interface of the LP solver interface.

 namespace lemon {

   class LpSolverBase {

   public:

     //UNCATEGORIZED

     /// \e

     typedef double Value;

     /// \e 

     static const Value INF;

    protected:

     //MATRIX MANIPULATING FUNCTIONS

     /// \e

     virtual int _addCol() = 0;

     /// \e

     virtual int _addRow() = 0;

     /// \e

     /// \warning Arrays are indexed from 1 (datum at index 0 is ignored)

     virtual void _setRowCoeffs(int i, 

 			       int length,

                                int  const * indices, 

                                Value  const * values ) = 0;

     /// \e

     /// \warning Arrays are indexed from 1 (datum at index 0 is ignored)

     virtual void _setColCoeffs(int i, 

 			       int length,

                                int  const * indices, 

                                Value  const * values ) = 0;

     /// \e

     /// The lower bound of a variable (column) have to be given by an 

     /// extended number of type Value, i.e. a finite number of type 

     /// Value or -INF.

     virtual void _setColLowerBound(int i, Value value) = 0;

     /// \e

     /// The upper bound of a variable (column) have to be given by an 

     /// extended number of type Value, i.e. a finite number of type 

     /// Value or INF.

     virtual void _setColUpperBound(int i, Value value) = 0;

     /// \e

     /// The lower bound of a linear expression (row) have to be given by an 

     /// extended number of type Value, i.e. a finite number of type 

     /// Value or -INF.

     virtual void _setRowLowerBound(int i, Value value) = 0;

     /// \e

     /// The upper bound of a linear expression (row) have to be given by an 

     /// extended number of type Value, i.e. a finite number of type 

     /// Value or INF.

     virtual void _setRowUpperBound(int i, Value value) = 0;

     /// \e

     virtual void _setObjCoeff(int i, Value obj_coef) = 0;

   };  

 } //namespace lemon

 #endif //LEMON_LP_BASE_H