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# src/LinAlg/IpDiagMatrix.hpp

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    00001 // Copyright (C) 2004, 2008 International Business Machines and others.
    00002 // All Rights Reserved.
    00003 // This code is published under the Eclipse Public License.
    00004 //
    00005 // $Id: IpDiagMatrix.hpp 1861 2010-12-21 21:34:47Z andreasw $
    00006 //
    00007 // Authors:  Carl Laird, Andreas Waechter     IBM    2004-08-13
    00008
    00009 #ifndef __IPDIAGMATRIX_HPP__
    00010 #define __IPDIAGMATRIX_HPP__
    00011
    00012 #include "IpUtils.hpp"
    00013 #include "IpSymMatrix.hpp"
    00014
    00015 namespace Ipopt
    00016 {
    00017
    00020   class DiagMatrix : public SymMatrix
    00021   {
    00022   public:
    00023
    00026
    00028     DiagMatrix(const SymMatrixSpace* owner_space);
    00029
    00031     ~DiagMatrix();
    00033
    00035     void SetDiag(const Vector& diag)
    00036     {
    00037       diag_ = &diag;
    00038     }
    00039
    00041     SmartPtr<const Vector> GetDiag() const
    00042     {
    00043       return diag_;
    00044     }
    00045
    00046   protected:
    00049     virtual void MultVectorImpl(Number alpha, const Vector& x,
    00050                                 Number beta, Vector& y) const;
    00051
    00054     virtual bool HasValidNumbersImpl() const;
    00055
    00056     virtual void ComputeRowAMaxImpl(Vector& rows_norms, bool init) const;
    00057
    00058     virtual void PrintImpl(const Journalist& jnlst,
    00059                            EJournalLevel level,
    00060                            EJournalCategory category,
    00061                            const std::string& name,
    00062                            Index indent,
    00063                            const std::string& prefix) const;
    00065
    00066   private:
    00076     DiagMatrix();
    00077
    00079     DiagMatrix(const DiagMatrix&);
    00080
    00082     void operator=(const DiagMatrix&);
    00084
    00086     SmartPtr<const Vector> diag_;
    00087   };
    00088
    00090   class DiagMatrixSpace : public SymMatrixSpace
    00091   {
    00092   public:
    00096     DiagMatrixSpace(Index dim)
    00097         :
    00098         SymMatrixSpace(dim)
    00099     {}
    00100
    00102     virtual ~DiagMatrixSpace()
    00103     {}
    00105
    00108     virtual SymMatrix* MakeNewSymMatrix() const
    00109     {
    00110       return MakeNewDiagMatrix();
    00111     }
    00112
    00114     DiagMatrix* MakeNewDiagMatrix() const
    00115     {
    00116       return new DiagMatrix(this);
    00117     }
    00118
    00119   private:
    00129     DiagMatrixSpace();
    00130
    00132     DiagMatrixSpace(const DiagMatrixSpace&);
    00133
    00135     void operator=(const DiagMatrixSpace&);
    00137
    00138   };
    00139
    00140 } // namespace Ipopt
    00141 #endif

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