CoinUtils 2.10.15

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CoinPresolveSingleton.hpp
Go to the documentation of this file.
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
24 class slack_doubleton_action : public CoinPresolveAction {
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
58 static const CoinPresolveAction *presolve(CoinPresolveMatrix *prob,
59 const CoinPresolveAction *next,
60 bool &notFinished);
61
62 void postsolve(CoinPostsolveMatrix *prob) const;
63
64
65 virtual ~slack_doubleton_action() { deleteAction(actions_,action*); }
66 };
75 class slack_singleton_action : public CoinPresolveAction {
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
110 virtual ~slack_singleton_action() { deleteAction(actions_,action*); }
111 };
112 #endif
slack_doubleton_action::action::coeff
double coeff
Definition: CoinPresolveSingleton.hpp:32
slack_doubleton_action::presolve
static const CoinPresolveAction * presolve(CoinPresolveMatrix *prob, const CoinPresolveAction *next, bool &notFinished)
Convert explicit bound constraints to column bounds.
slack_singleton_action
For variables with one entry.
Definition: CoinPresolveSingleton.hpp:75
slack_doubleton_action::action::col
int col
Definition: CoinPresolveSingleton.hpp:34
slack_doubleton_action::action::rup
double rup
Definition: CoinPresolveSingleton.hpp:30
slack_doubleton_action::nactions_
const int nactions_
Definition: CoinPresolveSingleton.hpp:38
slack_doubleton_action::action::clo
double clo
Definition: CoinPresolveSingleton.hpp:26
CoinPresolveAction
Abstract base class of all presolve routines.
Definition: CoinPresolveMatrix.hpp:155
slack_singleton_action::action::rlo
double rlo
Definition: CoinPresolveSingleton.hpp:80
slack_doubleton_action::slack_doubleton_action
slack_doubleton_action(int nactions, const action *actions, const CoinPresolveAction *next)
Definition: CoinPresolveSingleton.hpp:41
deleteAction
#define deleteAction(array, type)
Definition: CoinPresolveMatrix.hpp:38
slack_singleton_action::nactions_
const int nactions_
Definition: CoinPresolveSingleton.hpp:89
slack_doubleton_action::action::row
int row
Definition: CoinPresolveSingleton.hpp:35
slack_singleton_action::action::clo
double clo
Definition: CoinPresolveSingleton.hpp:77
slack_singleton_action::actions_
const action *const actions_
Definition: CoinPresolveSingleton.hpp:90
CoinPresolveAction::next
const CoinPresolveAction * next
The next presolve transformation.
Definition: CoinPresolveMatrix.hpp:171
CoinPostsolveMatrix
Augments CoinPrePostsolveMatrix with information about the problem that is only needed during postsol...
Definition: CoinPresolveMatrix.hpp:1421
slack_doubleton_action::action
Definition: CoinPresolveSingleton.hpp:25
slack_singleton_action::action::cup
double cup
Definition: CoinPresolveSingleton.hpp:78
slack_doubleton_action::action::cup
double cup
Definition: CoinPresolveSingleton.hpp:27
slack_singleton_action::postsolve
void postsolve(CoinPostsolveMatrix *prob) const
Apply the postsolve transformation for this particular presolve action.
slack_singleton_action::action::rup
double rup
Definition: CoinPresolveSingleton.hpp:81
slack_doubleton_action::action::rlo
double rlo
Definition: CoinPresolveSingleton.hpp:29
slack_singleton_action::action
Definition: CoinPresolveSingleton.hpp:76
CoinPresolveMatrix
Augments CoinPrePostsolveMatrix with information about the problem that is only needed during presolv...
Definition: CoinPresolveMatrix.hpp:835
slack_doubleton_action::~slack_doubleton_action
virtual ~slack_doubleton_action()
Definition: CoinPresolveSingleton.hpp:65
slack_doubleton_action
Convert an explicit bound constraint to a column bound.
Definition: CoinPresolveSingleton.hpp:24
slack_singleton_action::action::col
int col
Definition: CoinPresolveSingleton.hpp:85
slack_singleton_action::action::coeff
double coeff
Definition: CoinPresolveSingleton.hpp:83
slack_singleton_action::action::row
int row
Definition: CoinPresolveSingleton.hpp:86
slack_doubleton_action::name
const char * name() const
A name for debug printing.
Definition: CoinPresolveSingleton.hpp:50
slack_doubleton_action::actions_
const action *const actions_
Definition: CoinPresolveSingleton.hpp:39
slack_doubleton_action::postsolve
void postsolve(CoinPostsolveMatrix *prob) const
Apply the postsolve transformation for this particular presolve action.
slack_singleton_action::~slack_singleton_action
virtual ~slack_singleton_action()
Definition: CoinPresolveSingleton.hpp:110
slack_singleton_action::name
const char * name() const
A name for debug printing.
Definition: CoinPresolveSingleton.hpp:101
slack_singleton_action::slack_singleton_action
slack_singleton_action(int nactions, const action *actions, const CoinPresolveAction *next)
Definition: CoinPresolveSingleton.hpp:92
slack_singleton_action::presolve
static const CoinPresolveAction * presolve(CoinPresolveMatrix *prob, const CoinPresolveAction *next, double *rowObjective)