1 files changed, 66 insertions, 0 deletions
diff --git a/thirdparty/linux/include/coin/CoinPresolveTripleton.hpp b/thirdparty/linux/include/coin/CoinPresolveTripleton.hpp
new file mode 100644
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+++ b/thirdparty/linux/include/coin/CoinPresolveTripleton.hpp
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+/* $Id: CoinPresolveTripleton.hpp 1498 2011-11-02 15:25:35Z mjs $ */
+// Copyright (C) 2003, International Business Machines
+// Corporation and others.  All Rights Reserved.
+// This code is licensed under the terms of the Eclipse Public License (EPL).
+
+#ifndef CoinPresolveTripleton_H
+#define CoinPresolveTripleton_H
+#define TRIPLETON 11
+/** We are only going to do this if it does not increase number of elements?.
+    It could be generalized to more than three but it seems unlikely it would
+    help.
+
+    As it is adapted from doubleton icoly is one dropped.
+ */
+class tripleton_action : public CoinPresolveAction {
+ public:
+  struct action {
+    int icolx;
+    int icolz;
+    int row;
+
+    int icoly;
+    double cloy;
+    double cupy;
+    double costy;
+    double clox;
+    double cupx;
+    double costx;
+
+    double rlo;
+    double rup;
+
+    double coeffx;
+    double coeffy;
+    double coeffz;
+
+    double *colel;
+
+    int ncolx;
+    int ncoly;
+  };
+
+  const int nactions_;
+  const action *const actions_;
+
+ private:
+  tripleton_action(int nactions,
+		      const action *actions,
+		      const CoinPresolveAction *next) :
+    CoinPresolveAction(next),
+    nactions_(nactions), actions_(actions)
+{}
+
+ public:
+  const char *name() const { return ("tripleton_action"); }
+
+  static const CoinPresolveAction *presolve(CoinPresolveMatrix *,
+					 const CoinPresolveAction *next);
+  
+  void postsolve(CoinPostsolveMatrix *prob) const;
+
+  virtual ~tripleton_action();
+};
+#endif
+
+