equal
deleted
inserted
replaced
23 ///\brief Header of the LEMON-GLPK lp solver interface. |
23 ///\brief Header of the LEMON-GLPK lp solver interface. |
24 ///\ingroup lp_group |
24 ///\ingroup lp_group |
25 |
25 |
26 #include <lemon/lp_base.h> |
26 #include <lemon/lp_base.h> |
27 |
27 |
28 // forward declaration |
|
29 #if !defined _GLP_PROB && !defined GLP_PROB |
|
30 #define _GLP_PROB |
|
31 #define GLP_PROB |
|
32 typedef struct { double _opaque_prob; } glp_prob; |
|
33 /* LP/MIP problem object */ |
|
34 #endif |
|
35 |
|
36 namespace lemon { |
28 namespace lemon { |
37 |
29 |
|
30 namespace _solver_bits { |
|
31 class VoidPtr { |
|
32 private: |
|
33 void *_ptr; |
|
34 public: |
|
35 VoidPtr() : _ptr(0) {} |
|
36 |
|
37 template <typename T> |
|
38 VoidPtr(T* ptr) : _ptr(reinterpret_cast<void*>(ptr)) {} |
|
39 |
|
40 template <typename T> |
|
41 VoidPtr& operator=(T* ptr) { |
|
42 _ptr = reinterpret_cast<void*>(ptr); |
|
43 return *this; |
|
44 } |
|
45 |
|
46 template <typename T> |
|
47 operator T*() const { return reinterpret_cast<T*>(_ptr); } |
|
48 }; |
|
49 } |
38 |
50 |
39 /// \brief Base interface for the GLPK LP and MIP solver |
51 /// \brief Base interface for the GLPK LP and MIP solver |
40 /// |
52 /// |
41 /// This class implements the common interface of the GLPK LP and MIP solver. |
53 /// This class implements the common interface of the GLPK LP and MIP solver. |
42 /// \ingroup lp_group |
54 /// \ingroup lp_group |
43 class GlpkBase : virtual public LpBase { |
55 class GlpkBase : virtual public LpBase { |
44 protected: |
56 protected: |
45 |
57 |
46 typedef glp_prob LPX; |
58 _solver_bits::VoidPtr lp; |
47 glp_prob* lp; |
|
48 |
59 |
49 GlpkBase(); |
60 GlpkBase(); |
50 GlpkBase(const GlpkBase&); |
61 GlpkBase(const GlpkBase&); |
51 virtual ~GlpkBase(); |
62 virtual ~GlpkBase(); |
52 |
63 |
121 int _message_level; |
132 int _message_level; |
122 |
133 |
123 public: |
134 public: |
124 |
135 |
125 ///Pointer to the underlying GLPK data structure. |
136 ///Pointer to the underlying GLPK data structure. |
126 LPX *lpx() {return lp;} |
137 _solver_bits::VoidPtr lpx() {return lp;} |
127 ///Const pointer to the underlying GLPK data structure. |
138 ///Const pointer to the underlying GLPK data structure. |
128 const LPX *lpx() const {return lp;} |
139 _solver_bits::VoidPtr lpx() const {return lp;} |
129 |
140 |
130 ///Returns the constraint identifier understood by GLPK. |
141 ///Returns the constraint identifier understood by GLPK. |
131 int lpxRow(Row r) const { return rows(id(r)); } |
142 int lpxRow(Row r) const { return rows(id(r)); } |
132 |
143 |
133 ///Returns the variable identifier understood by GLPK. |
144 ///Returns the variable identifier understood by GLPK. |