IFPACK  Development
 All Classes Namespaces Files Functions Variables Enumerations Friends Pages
Ifpack_CrsIlut.cpp
1 /*@HEADER
2 // ***********************************************************************
3 //
4 // Ifpack: Object-Oriented Algebraic Preconditioner Package
5 // Copyright (2002) Sandia Corporation
6 //
7 // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
8 // license for use of this work by or on behalf of the U.S. Government.
9 //
10 // Redistribution and use in source and binary forms, with or without
11 // modification, are permitted provided that the following conditions are
12 // met:
13 //
14 // 1. Redistributions of source code must retain the above copyright
15 // notice, this list of conditions and the following disclaimer.
16 //
17 // 2. Redistributions in binary form must reproduce the above copyright
18 // notice, this list of conditions and the following disclaimer in the
19 // documentation and/or other materials provided with the distribution.
20 //
21 // 3. Neither the name of the Corporation nor the names of the
22 // contributors may be used to endorse or promote products derived from
23 // this software without specific prior written permission.
24 //
25 // THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
26 // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
29 // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
30 // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
31 // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
32 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 //
37 // Questions? Contact Michael A. Heroux (maherou@sandia.gov)
38 //
39 // ***********************************************************************
40 //@HEADER
41 */
42 
43 #include "Ifpack_CrsIlut.h"
44 #include "Epetra_Comm.h"
45 #include "Epetra_Map.h"
46 #include "Epetra_CrsGraph.h"
47 #include "Epetra_CrsMatrix.h"
48 #include "Epetra_VbrMatrix.h"
49 #include "Epetra_RowMatrix.h"
50 #include "Epetra_Vector.h"
51 #include "Epetra_MultiVector.h"
52 
53 #include <Teuchos_ParameterList.hpp>
54 #include <ifp_parameters.h>
55 
56 //==============================================================================
57 Ifpack_CrsIlut::Ifpack_CrsIlut(const Ifpack_OverlapGraph * OverlapGraph, double DropTol,
58  double FillTol)
59  : Epetra_Object("Ifpack::CrsIlut"),
61  Ifpack_OverlapFactorObject(OverlapGraph),
62  Ifpack_OverlapSolveObject(Epetra_Object::Label(), OverlapGraph->OverlapGraph().Comm()),
63  DropTol_(DropTol),
64  FillTol_(FillTol)
65 {
66 }
67 //==============================================================================
68 Ifpack_CrsIlut::Ifpack_CrsIlut(const Epetra_RowMatrix * UserMatrix, double DropTol,
69  double FillTol)
70  : Epetra_Object("Ifpack::CrsIlut"),
72  Ifpack_OverlapFactorObject(UserMatrix),
73  Ifpack_OverlapSolveObject(Epetra_Object::Label(), UserMatrix->Comm()),
74  DropTol_(DropTol),
75  FillTol_(FillTol)
76 {
77 }
78 //==============================================================================
80  : Epetra_Object(Source),
81  Epetra_CompObject(Source),
84  DropTol_(Source.DropTol_),
85  FillTol_(Source.FillTol_)
86 {
87 }
88 
89 //==========================================================================
90 int Ifpack_CrsIlut::SetParameters(const Teuchos::ParameterList& parameterlist,
91  bool cerr_warning_if_unused)
92 {
93  Ifpack::param_struct params;
94  params.double_params[Ifpack::fill_tolerance] = FillTol_;
95  params.double_params[Ifpack::drop_tolerance] = DropTol_;
96 
97  Ifpack::set_parameters(parameterlist, params, cerr_warning_if_unused);
98 
99  FillTol_ = params.double_params[Ifpack::fill_tolerance];
100  Droptol_ = params.double_params[Ifpack::drop_tolerance];
101 
102  return(0);
103 }
104 
105 //==============================================================================
107 {
108 
109  return(0);
110 }
111 //==============================================================================
113 {
114 
115  return(0);
116 }
Ifpack_OverlapGraph: Constructs a graph for use with Ifpack preconditioners.
Ifpack_CrsIlut(const Ifpack_OverlapGraph *OverlapGraph, double DropTol=1.0E-4, double FillTol=1.0)
Constructor using Ifpack_OverlapGraph.
Ifpack_OverlapSolveObject: Provides Overlapped Forward/back solve services for Ifpack.
int DerivedFactor()
Compute ILUT factors L and U: WARNING: THIS ROUTINE IS NOT USER CALLABLE, CALL Factor().
int ProcessOverlapMatrix(const Epetra_RowMatrix &A)
Processes the overlapped user matrix for computing the ILUT preconditioner.
Ifpack_CrsIlut: ILUT preconditioner of a given Epetra_RowMatrix.
int SetParameters(const Teuchos::ParameterList &parameterlist, bool cerr_warning_if_unused=false)
Set parameters using a Teuchos::ParameterList object.
Ifpack_OverlapFactorObject: Supports functionality common to Ifpack overlap factorization classes...