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// ***********************************************************************
//
// EpetraExt: Epetra Extended - Linear Algebra Services Package
// Copyright (2001) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
//
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA
// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
//
// ***********************************************************************
//@HEADER
#ifndef EPETRAEXT_READ_EPETRA_LINEAR_SYSTEM_H
#define EPETRAEXT_READ_EPETRA_LINEAR_SYSTEM_H
#include "Epetra_Map.h"
#include "Epetra_CrsMatrix.h"
#include "Epetra_Vector.h"
#include "Teuchos_RefCountPtr.hpp"
namespace EpetraExt {
/** \brief Read in an Epetra linear system from a file.
*
* \param fileName [in] Name of the file to read in the linear system (see file formats below).
* \param comm [in] The communicator
* \param map [out] The createe map. <tt>map==NULL</tt> is allowed on input in
* which case this will not be returned.
* \param A [out] The created matrix. <tt>A==NULL</tt> is allowed on input in
* which case this will not be returned.
* \param x [out] The created LHS vector. <tt>x==NULL</tt> is allowed on input in
* which case this will not be returned.
* \param b [out] The created RHS vector. <tt>b==NULL</tt> is allowed on input in
* which case this will not be returned.
* \param xExact [out] The created exact LHS vector (if known). <tt>xExact==NULL</tt> is allowed on input in
* which case this will not be returned.
*
* This function reads from a number file formats (*.triU, *.triS, *.mtx,
* *.hb)
*
* ToDo: Finish documentation!
*
* ToDo: Put this in EpetraExt after the release is finished.
*/
void readEpetraLinearSystem(
const std::string &fileName
,const Epetra_Comm &comm
,Teuchos::RefCountPtr<Epetra_CrsMatrix> *A = NULL
,Teuchos::RefCountPtr<Epetra_Map> *map = NULL
,Teuchos::RefCountPtr<Epetra_Vector> *x = NULL
,Teuchos::RefCountPtr<Epetra_Vector> *b = NULL
,Teuchos::RefCountPtr<Epetra_Vector> *xExact = NULL
);
} // namespace EpetraExt
#endif // EPETRAEXT_READ_EPETRA_LINEAR_SYSTEM_H
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