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CoinPresolveSingleton.hpp
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1 /* $Id: CoinPresolveSingleton.hpp 1498 2011-11-02 15:25:35Z mjs $ */
2 // Copyright (C) 2002, International Business Machines
3 // Corporation and others. All Rights Reserved.
4 // This code is licensed under the terms of the Eclipse Public License (EPL).
5 
6 #ifndef CoinPresolveSingleton_H
7 #define CoinPresolveSingleton_H
8 #define SLACK_DOUBLETON 2
9 #define SLACK_SINGLETON 8
10 
15 //const int MAX_SLACK_DOUBLETONS = 1000;
16 
25  struct action {
26  double clo;
27  double cup;
28 
29  double rlo;
30  double rup;
31 
32  double coeff;
33 
34  int col;
35  int row;
36  };
37 
38  const int nactions_;
39  const action *const actions_;
40 
41  slack_doubleton_action(int nactions,
42  const action *actions,
43  const CoinPresolveAction *next) :
44  CoinPresolveAction(next),
45  nactions_(nactions),
46  actions_(actions)
47 {}
48 
49  public:
50  const char *name() const { return ("slack_doubleton_action"); }
51 
59  const CoinPresolveAction *next,
60  bool &notFinished);
61 
62  void postsolve(CoinPostsolveMatrix *prob) const;
63 
64 
66 };
76  struct action {
77  double clo;
78  double cup;
79 
80  double rlo;
81  double rup;
82 
83  double coeff;
84 
85  int col;
86  int row;
87  };
88 
89  const int nactions_;
90  const action *const actions_;
91 
92  slack_singleton_action(int nactions,
93  const action *actions,
94  const CoinPresolveAction *next) :
95  CoinPresolveAction(next),
96  nactions_(nactions),
97  actions_(actions)
98 {}
99 
100  public:
101  const char *name() const { return ("slack_singleton_action"); }
102 
103  static const CoinPresolveAction *presolve(CoinPresolveMatrix *prob,
104  const CoinPresolveAction *next,
105  double * rowObjective);
106 
107  void postsolve(CoinPostsolveMatrix *prob) const;
108 
109 
111 };
112 #endif
static const CoinPresolveAction * presolve(CoinPresolveMatrix *prob, const CoinPresolveAction *next, bool &notFinished)
Convert explicit bound constraints to column bounds.
For variables with one entry.
Abstract base class of all presolve routines.
slack_doubleton_action(int nactions, const action *actions, const CoinPresolveAction *next)
#define deleteAction(array, type)
const action *const actions_
const CoinPresolveAction * next
The next presolve transformation.
Augments CoinPrePostsolveMatrix with information about the problem that is only needed during postsol...
void postsolve(CoinPostsolveMatrix *prob) const
Apply the postsolve transformation for this particular presolve action.
Augments CoinPrePostsolveMatrix with information about the problem that is only needed during presolv...
Convert an explicit bound constraint to a column bound.
const char * name() const
A name for debug printing.
const action *const actions_
void postsolve(CoinPostsolveMatrix *prob) const
Apply the postsolve transformation for this particular presolve action.
const char * name() const
A name for debug printing.
slack_singleton_action(int nactions, const action *actions, const CoinPresolveAction *next)
static const CoinPresolveAction * presolve(CoinPresolveMatrix *prob, const CoinPresolveAction *next, double *rowObjective)