Structure updated and intqpipopt files added

1 files changed, 226 insertions, 0 deletions

diff --git a/newstructure/thirdparty/linux/include/coin/CoinPresolveDupcol.hpp b/newstructure/thirdparty/linux/include/coin/CoinPresolveDupcol.hpp
new file mode 100644
index 0000000..16d3c91
--- /dev/null
+++ b/newstructure/thirdparty/linux/include/coin/CoinPresolveDupcol.hpp
@@ -0,0 +1,226 @@
+/* $Id: CoinPresolveDupcol.hpp 1817 2015-03-22 16:43:28Z forrest $ */
+// Copyright (C) 2002, International Business Machines
+// Corporation and others.  All Rights Reserved.
+// This code is licensed under the terms of the Eclipse Public License (EPL).
+
+#ifndef CoinPresolveDupcol_H
+#define CoinPresolveDupcol_H
+
+#include "CoinPresolveMatrix.hpp"
+
+/*!
+  \file
+*/
+
+#define	DUPCOL	10
+
+/*! \class dupcol_action
+    \brief Detect and remove duplicate columns
+
+    The general technique is to sum the coefficients a_(*,j) of each column.
+    Columns with identical sums are duplicates. The obvious problem is that,
+    <i>e.g.</i>, [1 0 1 0] and [0 1 0 1] both add to 2. To minimize the
+    chances of false positives, the coefficients of each row are multipled by
+    a random number r_i, so that we sum r_i*a_ij.
+
+   Candidate columns are checked to confirm they are identical. Where the
+   columns have the same objective coefficient, the two are combined. If the
+   columns have different objective coefficients, complications ensue. In order
+   to remove the duplicate, it must be possible to fix the variable at a bound.
+*/
+
+class dupcol_action : public CoinPresolveAction {
+  dupcol_action();
+  dupcol_action(const dupcol_action& rhs);
+  dupcol_action& operator=(const dupcol_action& rhs);
+
+  struct action {
+    double thislo;
+    double thisup;
+    double lastlo;
+    double lastup;
+    int ithis;
+    int ilast;
+
+    double *colels;
+    int nincol;
+  };
+
+  const int nactions_;
+  // actions_ is owned by the class and must be deleted at destruction
+  const action *const actions_;
+
+  dupcol_action(int nactions, const action *actions,
+		const CoinPresolveAction *next) :
+      CoinPresolveAction(next),
+      nactions_(nactions),
+      actions_(actions) {}
+
+ public:
+  const char *name() const;
+
+  static const CoinPresolveAction *presolve(CoinPresolveMatrix *prob,
+					 const CoinPresolveAction *next);
+
+  void postsolve(CoinPostsolveMatrix *prob) const;
+
+  virtual ~dupcol_action();
+
+};
+
+
+/*! \class duprow_action
+    \brief Detect and remove duplicate rows
+
+    The algorithm to detect duplicate rows is as outlined for dupcol_action.
+
+    If the feasible interval for one constraint is strictly contained in the
+    other, the tighter (contained) constraint is kept. If the feasible
+    intervals are disjoint, the problem is infeasible. If the feasible
+    intervals overlap, both constraints are kept.
+
+    duprow_action is definitely a work in progress; #postsolve is
+    unimplemented.
+    This doesn't matter as it uses useless_constraint.
+*/
+
+class duprow_action : public CoinPresolveAction {
+  struct action {
+    int row;
+    double lbound;
+    double ubound;
+  };
+
+  const int nactions_;
+  const action *const actions_;
+
+  duprow_action():CoinPresolveAction(NULL),nactions_(0),actions_(NULL) {}
+  duprow_action(int nactions,
+		      const action *actions,
+		      const CoinPresolveAction *next) :
+    CoinPresolveAction(next),
+    nactions_(nactions), actions_(actions) {}
+
+ public:
+  const char *name() const;
+
+  static const CoinPresolveAction *presolve(CoinPresolveMatrix *prob,
+					 const CoinPresolveAction *next);
+
+  void postsolve(CoinPostsolveMatrix *prob) const;
+
+  //~duprow_action() { delete[]actions_; }
+};
+
+class duprow3_action : public CoinPresolveAction {
+  struct action {
+    int row;
+    double lbound;
+    double ubound;
+  };
+
+  const int nactions_;
+  const action *const actions_;
+
+  duprow3_action():CoinPresolveAction(NULL),nactions_(0),actions_(NULL) {}
+  duprow3_action(int nactions,
+		      const action *actions,
+		      const CoinPresolveAction *next) :
+    CoinPresolveAction(next),
+    nactions_(nactions), actions_(actions) {}
+
+ public:
+  const char *name() const;
+
+  static const CoinPresolveAction *presolve(CoinPresolveMatrix *prob,
+					 const CoinPresolveAction *next);
+
+  void postsolve(CoinPostsolveMatrix *prob) const;
+
+  //~duprow_action() { delete[]actions_; }
+};
+
+/*! \class gubrow_action
+    \brief Detect and remove entries whose sum is known
+
+    If we have an equality row where all entries same then
+    For other rows where all entries for that equality row are same
+    then we can delete entries and modify rhs
+    gubrow_action is definitely a work in progress; #postsolve is
+    unimplemented.
+*/
+
+class gubrow_action : public CoinPresolveAction {
+  struct action {
+    int row;
+    double lbound;
+    double ubound;
+  };
+
+  const int nactions_;
+  const action *const actions_;
+
+  gubrow_action():CoinPresolveAction(NULL),nactions_(0),actions_(NULL) {}
+  gubrow_action(int nactions,
+		      const action *actions,
+		      const CoinPresolveAction *next) :
+    CoinPresolveAction(next),
+    nactions_(nactions), actions_(actions) {}
+
+ public:
+  const char *name() const;
+
+  static const CoinPresolveAction *presolve(CoinPresolveMatrix *prob,
+					 const CoinPresolveAction *next);
+
+  void postsolve(CoinPostsolveMatrix *prob) const;
+
+  //~gubrow_action() { delete[]actions_; }
+};
+
+/*! \class twoxtwo_action
+    \brief Detect interesting 2 by 2 blocks
+
+    If a variable has two entries and for each row there are only
+    two entries with same other variable then we can get rid of 
+    one constraint and modify costs.
+
+    This is a work in progress - I need more examples
+*/
+
+class twoxtwo_action : public CoinPresolveAction {
+  struct action {
+    double lbound_row;
+    double ubound_row;
+    double lbound_col;
+    double ubound_col;
+    double cost_col;
+    double cost_othercol;
+    int row;
+    int col;
+    int othercol;
+  };
+
+  const int nactions_;
+  const action *const actions_;
+
+  twoxtwo_action():CoinPresolveAction(NULL),nactions_(0),actions_(NULL) {}
+  twoxtwo_action(int nactions,
+		      const action *actions,
+		      const CoinPresolveAction *next) :
+    CoinPresolveAction(next),
+    nactions_(nactions), actions_(actions) {}
+
+ public:
+  const char *name() const;
+
+  static const CoinPresolveAction *presolve(CoinPresolveMatrix *prob,
+					 const CoinPresolveAction *next);
+
+  void postsolve(CoinPostsolveMatrix *prob) const;
+
+  ~twoxtwo_action() { delete [] actions_; }
+};
+
+#endif
+