simpleMatrix.H

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Copyright (C) 2011-2020 OpenFOAM Foundation
     \\/     M anipulation  |
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
Class
    Foam::simpleMatrix
 
Description
    A simple square matrix solver with scalar coefficients.
 
SourceFiles
    simpleMatrix.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef simpleMatrix_H
#define simpleMatrix_H
 
#include "scalarMatrices.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward declaration of friend functions and operators
 
template<class Type>
class simpleMatrix;
 
template<class Type>
Ostream& operator<<
(
    Ostream&,
    const simpleMatrix<Type>&
);
 
 
/*---------------------------------------------------------------------------*\
                        Class simpleMatrix Declaration
\*---------------------------------------------------------------------------*/
 
template<class Type>
class simpleMatrix
:
    public scalarSquareMatrix
{
    // Private Data
 
        Field<Type> source_;
 
 
public:
 
    // Constructors
 
        //- Construct given size
        //  Note: this does not initialise the coefficients or the source.
        simpleMatrix(const label);
 
        //- Construct given size and initial values for coefficients and source
        simpleMatrix(const label, const scalar, const Type&);
 
        //- Construct from components
        simpleMatrix(const scalarSquareMatrix&, const Field<Type>&);
 
        //- Construct from Istream
        simpleMatrix(Istream&);
 
        //- Copy constructor
        simpleMatrix(const simpleMatrix<Type>&);
 
 
    // Member Functions
 
        // Access
 
            //- Return access to the source
            Field<Type>& source()
            {
                return source_;
            }
 
            //- Return const-access to the source
            const Field<Type>& source() const
            {
                return source_;
            }
 
 
        //- Solve the matrix using Gaussian elimination with pivoting
        //  and return the solution
        Field<Type> solve() const;
 
        //- Solve the matrix using LU decomposition with pivoting
        //  and return the solution
        Field<Type> LUsolve() const;
 
 
    // Member Operators
 
        void operator=(const simpleMatrix<Type>&);
 
 
    // Ostream Operator
 
        friend Ostream& operator<< <Type>
        (
            Ostream&,
            const simpleMatrix<Type>&
        );
};
 
 
// Global operators
 
template<class Type>
simpleMatrix<Type> operator+
(
    const simpleMatrix<Type>&,
    const simpleMatrix<Type>&
);
 
template<class Type>
simpleMatrix<Type> operator-
(
    const simpleMatrix<Type>&,
    const simpleMatrix<Type>&
);
 
template<class Type>
simpleMatrix<Type> operator*
(
    const scalar,
    const simpleMatrix<Type>&
);
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "simpleMatrix.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //