1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/lemon/glpk.h Thu Dec 10 17:05:35 2009 +0100
1.3 @@ -0,0 +1,236 @@
1.4 +/* -*- mode: C++; indent-tabs-mode: nil; -*-
1.5 + *
1.6 + * This file is a part of LEMON, a generic C++ optimization library.
1.7 + *
1.8 + * Copyright (C) 2003-2008
1.9 + * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
1.10 + * (Egervary Research Group on Combinatorial Optimization, EGRES).
1.11 + *
1.12 + * Permission to use, modify and distribute this software is granted
1.13 + * provided that this copyright notice appears in all copies. For
1.14 + * precise terms see the accompanying LICENSE file.
1.15 + *
1.16 + * This software is provided "AS IS" with no warranty of any kind,
1.17 + * express or implied, and with no claim as to its suitability for any
1.18 + * purpose.
1.19 + *
1.20 + */
1.21 +
1.22 +#ifndef LEMON_GLPK_H
1.23 +#define LEMON_GLPK_H
1.24 +
1.25 +///\file
1.26 +///\brief Header of the LEMON-GLPK lp solver interface.
1.27 +///\ingroup lp_group
1.28 +
1.29 +#include <lemon/lp_base.h>
1.30 +
1.31 +// forward declaration
1.32 +#if !defined _GLP_PROB && !defined GLP_PROB
1.33 +#define _GLP_PROB
1.34 +#define GLP_PROB
1.35 +typedef struct { double _opaque_prob; } glp_prob;
1.36 +/* LP/MIP problem object */
1.37 +#endif
1.38 +
1.39 +namespace lemon {
1.40 +
1.41 +
1.42 + /// \brief Base interface for the GLPK LP and MIP solver
1.43 + ///
1.44 + /// This class implements the common interface of the GLPK LP and MIP solver.
1.45 + /// \ingroup lp_group
1.46 + class GlpkBase : virtual public LpBase {
1.47 + protected:
1.48 +
1.49 + typedef glp_prob LPX;
1.50 + glp_prob* lp;
1.51 +
1.52 + GlpkBase();
1.53 + GlpkBase(const GlpkBase&);
1.54 + virtual ~GlpkBase();
1.55 +
1.56 + protected:
1.57 +
1.58 + virtual int _addCol();
1.59 + virtual int _addRow();
1.60 +
1.61 + virtual void _eraseCol(int i);
1.62 + virtual void _eraseRow(int i);
1.63 +
1.64 + virtual void _eraseColId(int i);
1.65 + virtual void _eraseRowId(int i);
1.66 +
1.67 + virtual void _getColName(int col, std::string& name) const;
1.68 + virtual void _setColName(int col, const std::string& name);
1.69 + virtual int _colByName(const std::string& name) const;
1.70 +
1.71 + virtual void _getRowName(int row, std::string& name) const;
1.72 + virtual void _setRowName(int row, const std::string& name);
1.73 + virtual int _rowByName(const std::string& name) const;
1.74 +
1.75 + virtual void _setRowCoeffs(int i, ExprIterator b, ExprIterator e);
1.76 + virtual void _getRowCoeffs(int i, InsertIterator b) const;
1.77 +
1.78 + virtual void _setColCoeffs(int i, ExprIterator b, ExprIterator e);
1.79 + virtual void _getColCoeffs(int i, InsertIterator b) const;
1.80 +
1.81 + virtual void _setCoeff(int row, int col, Value value);
1.82 + virtual Value _getCoeff(int row, int col) const;
1.83 +
1.84 + virtual void _setColLowerBound(int i, Value value);
1.85 + virtual Value _getColLowerBound(int i) const;
1.86 +
1.87 + virtual void _setColUpperBound(int i, Value value);
1.88 + virtual Value _getColUpperBound(int i) const;
1.89 +
1.90 + virtual void _setRowLowerBound(int i, Value value);
1.91 + virtual Value _getRowLowerBound(int i) const;
1.92 +
1.93 + virtual void _setRowUpperBound(int i, Value value);
1.94 + virtual Value _getRowUpperBound(int i) const;
1.95 +
1.96 + virtual void _setObjCoeffs(ExprIterator b, ExprIterator e);
1.97 + virtual void _getObjCoeffs(InsertIterator b) const;
1.98 +
1.99 + virtual void _setObjCoeff(int i, Value obj_coef);
1.100 + virtual Value _getObjCoeff(int i) const;
1.101 +
1.102 + virtual void _setSense(Sense);
1.103 + virtual Sense _getSense() const;
1.104 +
1.105 + virtual void _clear();
1.106 +
1.107 + virtual void _messageLevel(MessageLevel level);
1.108 +
1.109 + private:
1.110 +
1.111 + static void freeEnv();
1.112 +
1.113 + struct FreeEnvHelper {
1.114 + ~FreeEnvHelper() {
1.115 + freeEnv();
1.116 + }
1.117 + };
1.118 +
1.119 + static FreeEnvHelper freeEnvHelper;
1.120 +
1.121 + protected:
1.122 +
1.123 + int _message_level;
1.124 +
1.125 + public:
1.126 +
1.127 + ///Pointer to the underlying GLPK data structure.
1.128 + LPX *lpx() {return lp;}
1.129 + ///Const pointer to the underlying GLPK data structure.
1.130 + const LPX *lpx() const {return lp;}
1.131 +
1.132 + ///Returns the constraint identifier understood by GLPK.
1.133 + int lpxRow(Row r) const { return rows(id(r)); }
1.134 +
1.135 + ///Returns the variable identifier understood by GLPK.
1.136 + int lpxCol(Col c) const { return cols(id(c)); }
1.137 +
1.138 + };
1.139 +
1.140 + /// \brief Interface for the GLPK LP solver
1.141 + ///
1.142 + /// This class implements an interface for the GLPK LP solver.
1.143 + ///\ingroup lp_group
1.144 + class GlpkLp : public LpSolver, public GlpkBase {
1.145 + public:
1.146 +
1.147 + ///\e
1.148 + GlpkLp();
1.149 + ///\e
1.150 + GlpkLp(const GlpkLp&);
1.151 +
1.152 + ///\e
1.153 + virtual GlpkLp* cloneSolver() const;
1.154 + ///\e
1.155 + virtual GlpkLp* newSolver() const;
1.156 +
1.157 + private:
1.158 +
1.159 + mutable std::vector<double> _primal_ray;
1.160 + mutable std::vector<double> _dual_ray;
1.161 +
1.162 + void _clear_temporals();
1.163 +
1.164 + protected:
1.165 +
1.166 + virtual const char* _solverName() const;
1.167 +
1.168 + virtual SolveExitStatus _solve();
1.169 + virtual Value _getPrimal(int i) const;
1.170 + virtual Value _getDual(int i) const;
1.171 +
1.172 + virtual Value _getPrimalValue() const;
1.173 +
1.174 + virtual VarStatus _getColStatus(int i) const;
1.175 + virtual VarStatus _getRowStatus(int i) const;
1.176 +
1.177 + virtual Value _getPrimalRay(int i) const;
1.178 + virtual Value _getDualRay(int i) const;
1.179 +
1.180 + virtual ProblemType _getPrimalType() const;
1.181 + virtual ProblemType _getDualType() const;
1.182 +
1.183 + public:
1.184 +
1.185 + ///Solve with primal simplex
1.186 + SolveExitStatus solvePrimal();
1.187 +
1.188 + ///Solve with dual simplex
1.189 + SolveExitStatus solveDual();
1.190 +
1.191 + private:
1.192 +
1.193 + bool _presolve;
1.194 +
1.195 + public:
1.196 +
1.197 + ///Turns on or off the presolver
1.198 +
1.199 + ///Turns on (\c b is \c true) or off (\c b is \c false) the presolver
1.200 + ///
1.201 + ///The presolver is off by default.
1.202 + void presolver(bool presolve);
1.203 +
1.204 + };
1.205 +
1.206 + /// \brief Interface for the GLPK MIP solver
1.207 + ///
1.208 + /// This class implements an interface for the GLPK MIP solver.
1.209 + ///\ingroup lp_group
1.210 + class GlpkMip : public MipSolver, public GlpkBase {
1.211 + public:
1.212 +
1.213 + ///\e
1.214 + GlpkMip();
1.215 + ///\e
1.216 + GlpkMip(const GlpkMip&);
1.217 +
1.218 + virtual GlpkMip* cloneSolver() const;
1.219 + virtual GlpkMip* newSolver() const;
1.220 +
1.221 + protected:
1.222 +
1.223 + virtual const char* _solverName() const;
1.224 +
1.225 + virtual ColTypes _getColType(int col) const;
1.226 + virtual void _setColType(int col, ColTypes col_type);
1.227 +
1.228 + virtual SolveExitStatus _solve();
1.229 + virtual ProblemType _getType() const;
1.230 + virtual Value _getSol(int i) const;
1.231 + virtual Value _getSolValue() const;
1.232 +
1.233 + };
1.234 +
1.235 +
1.236 +} //END OF NAMESPACE LEMON
1.237 +
1.238 +#endif //LEMON_GLPK_H
1.239 +