1 | /* -*- C++ -*- |
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2 | * lemon/lp_glpk.h - Part of LEMON, a generic C++ optimization library |
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3 | * |
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4 | * Copyright (C) 2005 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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5 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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6 | * |
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7 | * Permission to use, modify and distribute this software is granted |
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8 | * provided that this copyright notice appears in all copies. For |
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9 | * precise terms see the accompanying LICENSE file. |
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10 | * |
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11 | * This software is provided "AS IS" with no warranty of any kind, |
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12 | * express or implied, and with no claim as to its suitability for any |
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13 | * purpose. |
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14 | * |
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15 | */ |
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16 | |
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17 | #ifndef LEMON_LP_GLPK_H |
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18 | #define LEMON_LP_GLPK_H |
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19 | |
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20 | ///\file |
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21 | ///\brief Header of the LEMON-GLPK lp solver interface. |
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22 | ///\ingroup gen_opt_group |
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23 | |
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24 | #include <lemon/lp_base.h> |
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25 | extern "C" { |
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26 | #include <glpk.h> |
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27 | } |
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28 | |
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29 | namespace lemon { |
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30 | |
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31 | |
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32 | /// \brief Interface for the GLPK LP solver |
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33 | /// |
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34 | /// This class implements an interface for the GLPK LP solver. |
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35 | ///\ingroup gen_opt_group |
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36 | class LpGlpk : public LpSolverBase { |
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37 | protected: |
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38 | LPX* lp; |
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39 | |
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40 | public: |
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41 | |
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42 | typedef LpSolverBase Parent; |
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43 | |
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44 | LpGlpk(); |
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45 | ~LpGlpk(); |
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46 | |
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47 | protected: |
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48 | virtual LpSolverBase &_newLp(); |
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49 | virtual LpSolverBase &_copyLp(); |
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50 | |
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51 | virtual int _addCol(); |
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52 | virtual int _addRow(); |
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53 | virtual void _eraseCol(int i); |
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54 | virtual void _eraseRow(int i); |
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55 | |
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56 | virtual void _setRowCoeffs(int i, |
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57 | int length, |
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58 | const int * indices, |
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59 | const Value * values ); |
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60 | virtual void _setColCoeffs(int i, |
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61 | int length, |
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62 | const int * indices, |
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63 | const Value * values); |
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64 | virtual void _setCoeff(int row, int col, Value value); |
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65 | virtual void _setColLowerBound(int i, Value value); |
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66 | virtual void _setColUpperBound(int i, Value value); |
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67 | // virtual void _setRowLowerBound(int i, Value value); |
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68 | // virtual void _setRowUpperBound(int i, Value value); |
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69 | virtual void _setRowBounds(int i, Value lower, Value upper); |
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70 | virtual void _setObjCoeff(int i, Value obj_coef); |
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71 | virtual void _clearObj(); |
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72 | // virtual void _setObj(int length, |
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73 | // int const * indices, |
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74 | // Value const * values ) = 0; |
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75 | |
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76 | ///\e |
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77 | |
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78 | ///\todo It should be clarified |
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79 | /// |
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80 | virtual SolveExitStatus _solve(); |
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81 | virtual Value _getPrimal(int i); |
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82 | virtual Value _getDual(int i); |
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83 | virtual Value _getPrimalValue(); |
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84 | virtual bool _isBasicCol(int i); |
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85 | ///\e |
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86 | |
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87 | ///\todo It should be clarified |
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88 | /// |
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89 | virtual SolutionStatus _getPrimalStatus(); |
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90 | virtual SolutionStatus _getDualStatus(); |
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91 | virtual ProblemTypes _getProblemType(); |
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92 | |
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93 | virtual void _setMax(); |
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94 | virtual void _setMin(); |
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95 | |
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96 | public: |
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97 | ///Set the verbosity of the messages |
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98 | |
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99 | ///Set the verbosity of the messages |
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100 | /// |
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101 | ///\param m is the level of the messages output by the solver routines. |
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102 | ///The possible values are: |
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103 | ///- 0 --- no output (default value) |
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104 | ///- 1 --- error messages only |
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105 | ///- 2 --- normal output |
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106 | ///- 3 --- full output (includes informational messages) |
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107 | void messageLevel(int m); |
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108 | ///Turns on or off the presolver |
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109 | |
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110 | ///Turns on (\c b is \c true) or off (\c b is \c false) the presolver |
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111 | /// |
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112 | ///The presolver is off by default. |
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113 | void presolver(bool b); |
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114 | |
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115 | }; |
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116 | } //END OF NAMESPACE LEMON |
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117 | |
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118 | #endif //LEMON_LP_GLPK_H |
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119 | |
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