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+// Copyright (C) 2005, 2009 International Business Machines and others.
+// All Rights Reserved.
+// This code is published under the Eclipse Public License.
+//
+// $Id: IpSolveStatistics.hpp 1861 2010-12-21 21:34:47Z andreasw $
+//
+// Authors:  Carl Laird, Andreas Waechter          IBM    2005-08-15
+
+#ifndef __IPSOLVESTATISTICS_HPP__
+#define __IPSOLVESTATISTICS_HPP__
+
+#include "IpReferenced.hpp"
+#include "IpSmartPtr.hpp"
+
+namespace Ipopt
+{
+  // forward declaration (to avoid inclusion of too many header files)
+  class IpoptNLP;
+  class IpoptData;
+  class IpoptCalculatedQuantities;
+
+  /** This class collects statistics about an optimziation run, such
+   *  as iteration count, final infeasibilities etc.  It is meant to
+   *  provide such information to a user of Ipopt during the
+   *  finalize_solution call.
+   */
+  class SolveStatistics : public ReferencedObject
+  {
+  public:
+    /**@name Constructors/Destructors */
+    //@{
+    /** Default constructor.  It takes in those collecting Ipopt
+     *  objects that can provide the statistics information.  Those
+     *  statistics are retrieved at the time of the constructor
+     *  call. */
+    SolveStatistics(const SmartPtr<IpoptNLP>& ip_nlp,
+                    const SmartPtr<IpoptData>& ip_data,
+                    const SmartPtr<IpoptCalculatedQuantities>& ip_cq);
+
+    /** Default destructor */
+    virtual ~SolveStatistics()
+    {}
+    //@}
+
+    /** @name Accessor methods for retrieving different kind of solver
+     *  statistics information */
+    //@{
+    /** Iteration counts. */
+    virtual Index IterationCount() const;
+    /** Total CPU time, including function evaluations. */
+    virtual Number TotalCpuTime() const;
+    /** Total CPU time, including function evaluations. Included for
+     *  backward compatibility. */
+    Number TotalCPUTime() const
+    {
+      return TotalCpuTime();
+    }
+    /** Total System time, including function evaluations. */
+    virtual Number TotalSysTime() const;
+    /** Total wall clock time, including function evaluations. */
+    virtual Number TotalWallclockTime() const;
+    /** Number of NLP function evaluations. */
+    virtual void NumberOfEvaluations(Index& num_obj_evals,
+                                     Index& num_constr_evals,
+                                     Index& num_obj_grad_evals,
+                                     Index& num_constr_jac_evals,
+                                     Index& num_hess_evals) const;
+    /** Unscaled solution infeasibilities */
+    virtual void Infeasibilities(Number& dual_inf,
+                                 Number& constr_viol,
+                                 Number& complementarity,
+                                 Number& kkt_error) const;
+    /** Scaled solution infeasibilities */
+    virtual void ScaledInfeasibilities(Number& scaled_dual_inf,
+                                       Number& scaled_constr_viol,
+                                       Number& scaled_complementarity,
+                                       Number& scaled_kkt_error) const;
+    /** Final value of objective function */
+    virtual Number FinalObjective() const;
+    /** Final scaled value of objective function */
+    virtual Number FinalScaledObjective() const;
+    //@}
+
+  private:
+    /**@name Default Compiler Generated Methods
+     * (Hidden to avoid implicit creation/calling).
+     * These methods are not implemented and 
+     * we do not want the compiler to implement
+     * them for us, so we declare them private
+     * and do not define them. This ensures that
+     * they will not be implicitly created/called. */
+    //@{
+    /** Default Constructor */
+    SolveStatistics();
+
+    /** Copy Constructor */
+    SolveStatistics(const SolveStatistics&);
+
+    /** Overloaded Equals Operator */
+    void operator=(const SolveStatistics&);
+    //@}
+
+    /** @name Fields for storing the statistics data */
+    //@{
+    /** Number of iterations. */
+    Index num_iters_;
+    /* Total CPU time */
+    Number total_cpu_time_;
+    /* Total system time */
+    Number total_sys_time_;
+    /* Total wall clock time */
+    Number total_wallclock_time_;
+    /** Number of objective function evaluations. */
+    Index num_obj_evals_;
+    /** Number of constraints evaluations (max of equality and
+     *  inequality) */
+    Index num_constr_evals_;
+    /** Number of objective gradient evaluations. */
+    Index num_obj_grad_evals_;
+    /** Number of constraint Jacobian evaluations. */
+    Index num_constr_jac_evals_;
+    /** Number of Lagrangian Hessian evaluations. */
+    Index num_hess_evals_;
+
+    /** Final scaled value of objective function */
+    Number scaled_obj_val_;
+    /** Final unscaled value of objective function */
+    Number obj_val_;
+    /** Final scaled dual infeasibility (max-norm) */
+    Number scaled_dual_inf_;
+    /** Final unscaled dual infeasibility (max-norm) */
+    Number dual_inf_;
+    /** Final scaled constraint violation (max-norm) */
+    Number scaled_constr_viol_;
+    /** Final unscaled constraint violation (max-norm) */
+    Number constr_viol_;
+    /** Final scaled complementarity error (max-norm) */
+    Number scaled_compl_;
+    /** Final unscaled complementarity error (max-norm) */
+    Number compl_;
+    /** Final overall scaled KKT error (max-norm) */
+    Number scaled_kkt_error_;
+    /** Final overall unscaled KKT error (max-norm) */
+    Number kkt_error_;
+    //@}
+  };
+
+} // namespace Ipopt
+
+#endif