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+// $Id: CglZeroHalf.hpp 1122 2013-04-06 20:39:53Z stefan $
+// Copyright (C) 2010, International Business Machines
+// Corporation and others.  All Rights Reserved.
+// This code is licensed under the terms of the Eclipse Public License (EPL).
+#ifndef CglZeroHalf_H
+#define CglZeroHalf_H
+
+#include <string>
+
+#include "CglCutGenerator.hpp"
+#include "CoinPackedMatrix.hpp"
+#include "Cgl012cut.hpp" 
+
+/** Zero Half Cut Generator Class
+
+ This class generates zero half cuts via the following method:
+
+ See - 
+
+G. Andreello, A. Caprara, M. Fischetti,
+ “Embedding Cuts in a Branch and Cut Framework: a Computational Study 
+  with {0,1/2}-Cuts”, INFORMS Journal on Computing 19(2), 229-238, 2007.
+ 
+*/
+
+class CglZeroHalf : public CglCutGenerator {
+   friend void CglZeroHalfUnitTest(const OsiSolverInterface * siP,
+					 const std::string mpdDir );
+ 
+public:
+
+  /**@name Generate Cuts */
+  //@{
+  /** Generate zero half cuts for the model accessed through the solver interface. 
+  Insert generated cuts into the cut set cs.
+  */
+  virtual void generateCuts( const OsiSolverInterface & si, OsiCuts & cs,
+			     const CglTreeInfo info = CglTreeInfo());
+  //@}
+
+  /**@name Sets and Gets */
+  //@{
+  /// Get flags
+  inline int getFlags() const
+  { return flags_;}
+  /// Set flags
+  inline void setFlags(int value)
+  { flags_ = value;}
+  //@}
+
+  /**@name Constructors and destructors */
+  //@{
+  /// Default constructor 
+  CglZeroHalf ();
+ 
+  /// Copy constructor 
+  CglZeroHalf (
+    const CglZeroHalf &);
+
+  /// Clone
+  virtual CglCutGenerator * clone() const;
+
+  /// Assignment operator 
+  CglZeroHalf &
+    operator=(
+    const CglZeroHalf& rhs);
+  
+  /// Destructor 
+  virtual
+    ~CglZeroHalf ();
+  /// Create C++ lines to get to current state
+  virtual std::string generateCpp( FILE * fp);
+  /// This can be used to refresh any information
+  virtual void refreshSolver(OsiSolverInterface * solver);
+  //@}
+
+private:
+  
+  // Private member methods
+   
+  /**@name Private methods */
+  //@{
+  //@}
+  
+  
+  /**@name Private member data */
+  //@{
+  /// number of rows in the ILP matrix 
+  int mr_;
+  /// number of columns in the ILP matrix 
+  int mc_;
+  /// number of nonzero's in the ILP matrix 
+  int mnz_;
+  /// starting position of each row in arrays mtind and mtval 
+  int *mtbeg_;
+  /// number of entries of each row in arrays mtind and mtval 
+  int *mtcnt_;
+  /// column indices of the nonzero entries of the ILP matrix 
+  int *mtind_;
+  /// values of the nonzero entries of the ILP matrix 
+  int *mtval_;
+  /// lower bounds on the variables 
+  int *vlb_;
+  /// upper bounds on the variables 
+  int *vub_;
+  /// right hand sides of the constraints 
+  int *mrhs_;
+  /// senses of the constraints: 'L', 'G' or 'E' 
+  char *msense_;
+  /// Cgl012Cut object to make thread safe
+  Cgl012Cut cutInfo_;
+  /** Flags
+      1 bit - global cuts 
+  */
+  int flags_;
+  //@}
+};
+/// A simple Dijkstra shortest path - make better later
+#ifndef CGL_NEW_SHORT
+void cglShortestPath(cgl_graph * graph, int source, int maximumLength);
+#else
+void cglShortestPath(auxiliary_graph * graph, int source, int maximumLength);
+#endif
+//#############################################################################
+/** A function that tests the methods in the CglZeroHalf class. The
+    only reason for it not to be a member method is that this way it doesn't
+    have to be compiled into the library. And that's a gain, because the
+    library should be compiled with optimization on, but this method should be
+    compiled with debugging. */
+void CglZeroHalfUnitTest(const OsiSolverInterface * siP,
+			       const std::string mpdDir );
+  
+#endif