From 4b64cf486f5c999fd8167758cae27839f3b50848 Mon Sep 17 00:00:00 2001
From: Harpreet
Date: Sat, 3 Sep 2016 00:34:27 +0530
Subject: Structure updated and intqpipopt files added

---
 .../linux/include/coin/CoinPresolveImpliedFree.hpp | 60 ++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 newstructure/thirdparty/linux/include/coin/CoinPresolveImpliedFree.hpp

(limited to 'newstructure/thirdparty/linux/include/coin/CoinPresolveImpliedFree.hpp')

diff --git a/newstructure/thirdparty/linux/include/coin/CoinPresolveImpliedFree.hpp b/newstructure/thirdparty/linux/include/coin/CoinPresolveImpliedFree.hpp
new file mode 100644
index 0000000..8215b98
--- /dev/null
+++ b/newstructure/thirdparty/linux/include/coin/CoinPresolveImpliedFree.hpp
@@ -0,0 +1,60 @@
+/* $Id: CoinPresolveImpliedFree.hpp 1694 2014-04-29 02:08:35Z tkr $ */
+// 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 CoinPresolveImpliedFree_H
+#define CoinPresolveImpliedFree_H
+
+/*!
+  \file
+*/
+
+#define	IMPLIED_FREE	9
+
+/*! \class implied_free_action
+    \brief Detect and process implied free variables
+
+  Consider a singleton variable x (<i>i.e.</i>, a variable involved in only
+  one constraint).  Suppose that the bounds on that constraint, combined with
+  the bounds on the other variables involved in the constraint, are such that
+  even the worst case values of the other variables still imply bounds for x
+  which are tighter than the variable's original bounds. Since x can never
+  reach its upper or lower bounds, it is an implied free variable. Both x and
+  the constraint can be deleted from the problem.
+
+  A similar transform for the case where the variable is not a natural column
+  singleton is handled by #subst_constraint_action.
+*/
+class implied_free_action : public CoinPresolveAction {
+  struct action {
+    int row, col;
+    double clo, cup;
+    double rlo, rup;
+    const double *rowels;
+    const double *costs;
+    int ninrow;
+  };
+
+  const int nactions_;
+  const action *const actions_;
+
+  implied_free_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,
+					int & fillLevel);
+
+  void postsolve(CoinPostsolveMatrix *prob) const;
+
+  virtual ~implied_free_action();
+};
+
+#endif
-- 
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