lemon/soplex.h
author Peter Kovacs <kpeter@inf.elte.hu>
Thu, 12 Nov 2009 23:29:42 +0100
changeset 808 9c428bb2b105
parent 576 745e182d0139
child 877 141f9c0db4a3
permissions -rw-r--r--
Port CostScaling from SVN -r3524 (#180)
     1 /* -*- mode: C++; indent-tabs-mode: nil; -*-
     2  *
     3  * This file is a part of LEMON, a generic C++ optimization library.
     4  *
     5  * Copyright (C) 2003-2008
     6  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
     7  * (Egervary Research Group on Combinatorial Optimization, EGRES).
     8  *
     9  * Permission to use, modify and distribute this software is granted
    10  * provided that this copyright notice appears in all copies. For
    11  * precise terms see the accompanying LICENSE file.
    12  *
    13  * This software is provided "AS IS" with no warranty of any kind,
    14  * express or implied, and with no claim as to its suitability for any
    15  * purpose.
    16  *
    17  */
    18 
    19 #ifndef LEMON_SOPLEX_H
    20 #define LEMON_SOPLEX_H
    21 
    22 ///\file
    23 ///\brief Header of the LEMON-SOPLEX lp solver interface.
    24 
    25 #include <vector>
    26 #include <string>
    27 
    28 #include <lemon/lp_base.h>
    29 
    30 // Forward declaration
    31 namespace soplex {
    32   class SoPlex;
    33 }
    34 
    35 namespace lemon {
    36 
    37   /// \ingroup lp_group
    38   ///
    39   /// \brief Interface for the SOPLEX solver
    40   ///
    41   /// This class implements an interface for the SoPlex LP solver.
    42   /// The SoPlex library is an object oriented lp solver library
    43   /// developed at the Konrad-Zuse-Zentrum für Informationstechnik
    44   /// Berlin (ZIB). You can find detailed information about it at the
    45   /// <tt>http://soplex.zib.de</tt> address.
    46   class SoplexLp : public LpSolver {
    47   private:
    48 
    49     soplex::SoPlex* soplex;
    50 
    51     std::vector<std::string> _col_names;
    52     std::map<std::string, int> _col_names_ref;
    53 
    54     std::vector<std::string> _row_names;
    55     std::map<std::string, int> _row_names_ref;
    56 
    57   private:
    58 
    59     // these values cannot be retrieved element by element
    60     mutable std::vector<Value> _primal_values;
    61     mutable std::vector<Value> _dual_values;
    62 
    63     mutable std::vector<Value> _primal_ray;
    64     mutable std::vector<Value> _dual_ray;
    65 
    66     void _clear_temporals();
    67 
    68   public:
    69 
    70     /// \e
    71     SoplexLp();
    72     /// \e
    73     SoplexLp(const SoplexLp&);
    74     /// \e
    75     ~SoplexLp();
    76     /// \e
    77     virtual SoplexLp* newSolver() const;
    78     /// \e
    79     virtual SoplexLp* cloneSolver() const;
    80 
    81   protected:
    82 
    83     virtual const char* _solverName() const;
    84 
    85     virtual int _addCol();
    86     virtual int _addRow();
    87     virtual int _addRow(Value l, ExprIterator b, ExprIterator e, Value u);
    88 
    89     virtual void _eraseCol(int i);
    90     virtual void _eraseRow(int i);
    91 
    92     virtual void _eraseColId(int i);
    93     virtual void _eraseRowId(int i);
    94 
    95     virtual void _getColName(int col, std::string& name) const;
    96     virtual void _setColName(int col, const std::string& name);
    97     virtual int _colByName(const std::string& name) const;
    98 
    99     virtual void _getRowName(int row, std::string& name) const;
   100     virtual void _setRowName(int row, const std::string& name);
   101     virtual int _rowByName(const std::string& name) const;
   102 
   103     virtual void _setRowCoeffs(int i, ExprIterator b, ExprIterator e);
   104     virtual void _getRowCoeffs(int i, InsertIterator b) const;
   105 
   106     virtual void _setColCoeffs(int i, ExprIterator b, ExprIterator e);
   107     virtual void _getColCoeffs(int i, InsertIterator b) const;
   108 
   109     virtual void _setCoeff(int row, int col, Value value);
   110     virtual Value _getCoeff(int row, int col) const;
   111 
   112     virtual void _setColLowerBound(int i, Value value);
   113     virtual Value _getColLowerBound(int i) const;
   114     virtual void _setColUpperBound(int i, Value value);
   115     virtual Value _getColUpperBound(int i) const;
   116 
   117     virtual void _setRowLowerBound(int i, Value value);
   118     virtual Value _getRowLowerBound(int i) const;
   119     virtual void _setRowUpperBound(int i, Value value);
   120     virtual Value _getRowUpperBound(int i) const;
   121 
   122     virtual void _setObjCoeffs(ExprIterator b, ExprIterator e);
   123     virtual void _getObjCoeffs(InsertIterator b) const;
   124 
   125     virtual void _setObjCoeff(int i, Value obj_coef);
   126     virtual Value _getObjCoeff(int i) const;
   127 
   128     virtual void _setSense(Sense sense);
   129     virtual Sense _getSense() const;
   130 
   131     virtual SolveExitStatus _solve();
   132     virtual Value _getPrimal(int i) const;
   133     virtual Value _getDual(int i) const;
   134 
   135     virtual Value _getPrimalValue() const;
   136 
   137     virtual Value _getPrimalRay(int i) const;
   138     virtual Value _getDualRay(int i) const;
   139 
   140     virtual VarStatus _getColStatus(int i) const;
   141     virtual VarStatus _getRowStatus(int i) const;
   142 
   143     virtual ProblemType _getPrimalType() const;
   144     virtual ProblemType _getDualType() const;
   145 
   146     virtual void _clear();
   147 
   148     void _messageLevel(MessageLevel m);
   149     void _applyMessageLevel();
   150 
   151     int _message_level;
   152 
   153   };
   154 
   155 } //END OF NAMESPACE LEMON
   156 
   157 #endif //LEMON_SOPLEX_H
   158