EpetraExt_BlockVector.cpp

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00001 //@HEADER
00002 // ************************************************************************
00003 // 
00004 //               EpetraExt: Extended Linear Algebra Services Package 
00005 //                 Copyright (2001) Sandia Corporation
00006 // 
00007 // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
00008 // license for use of this work by or on behalf of the U.S. Government.
00009 // 
00010 // This library is free software; you can redistribute it and/or modify
00011 // it under the terms of the GNU Lesser General Public License as
00012 // published by the Free Software Foundation; either version 2.1 of the
00013 // License, or (at your option) any later version.
00014 //  
00015 // This library is distributed in the hope that it will be useful, but
00016 // WITHOUT ANY WARRANTY; without even the implied warranty of
00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00018 // Lesser General Public License for more details.
00019 //  
00020 // You should have received a copy of the GNU Lesser General Public
00021 // License along with this library; if not, write to the Free Software
00022 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
00023 // USA
00024 // Questions? Contact Michael A. Heroux (maherou@sandia.gov) 
00025 // 
00026 // ************************************************************************
00027 //@HEADER
00028 
00029 #include "EpetraExt_BlockVector.h"
00030 #include "EpetraExt_BlockUtility.h"
00031 #include "Epetra_Map.h"
00032 #include "Epetra_Comm.h"
00033 
00034 namespace EpetraExt {
00035 
00036 //=============================================================================
00037 // EpetraExt::BlockVector Constructor
00038 BlockVector::BlockVector(
00039       const Epetra_BlockMap & BaseMap,
00040       const Epetra_BlockMap & GlobalMap)
00041   : Epetra_Vector( GlobalMap ),
00042     BaseMap_( BaseMap ),
00043     Offset_( BlockUtility::CalculateOffset( BaseMap ) )
00044 {
00045 }
00046 
00047 //=============================================================================
00048 // EpetraExt::BlockVector Constructor
00049 BlockVector::BlockVector(
00050       Epetra_DataAccess CV, 
00051       const Epetra_BlockMap & BaseMap, 
00052       const Epetra_Vector & BlockVec)
00053   : Epetra_Vector( CV, BlockVec, 0 ),
00054     BaseMap_( BaseMap ),
00055     Offset_( BlockUtility::CalculateOffset( BaseMap ) )
00056 {
00057 }
00058 
00059 //==========================================================================
00060 // Copy Constructor
00061 BlockVector::BlockVector(const BlockVector& Source)
00062   : Epetra_Vector( dynamic_cast<const Epetra_Vector &>(Source) ),
00063     BaseMap_( Source.BaseMap_ ),
00064     Offset_( Source.Offset_ )
00065 {
00066 }
00067 
00068 //=========================================================================
00069 BlockVector::~BlockVector()
00070 {
00071 }
00072 
00073 //=========================================================================
00074 int BlockVector::ExtractBlockValues(Epetra_Vector & BaseVector, int GlobalBlockRow) const
00075 {
00076    int IndexOffset = GlobalBlockRow * Offset_;
00077    int localIndex=0;
00078 
00079    // For each entry in the base vector, translate its global ID
00080    // by the IndexOffset and extract the value from this blockVector
00081    for (int i=0; i<BaseMap_.NumMyElements(); i++) {
00082       localIndex = this->Map().LID((IndexOffset + BaseMap_.GID(i)));
00083       if (localIndex==-1) { 
00084        cout << "Error in  BlockVector::GetBlock: " << i << " " 
00085       << IndexOffset << " " << BaseMap_.GID(i) << endl;
00086        return -1;
00087       }
00088       BaseVector[i] = Values_[localIndex]; 
00089    }
00090 
00091    return 0;
00092 }
00093 
00094 //=========================================================================
00095 int BlockVector::LoadBlockValues(const Epetra_Vector & BaseVector, int GlobalBlockRow) 
00096 {
00097    int IndexOffset = GlobalBlockRow * Offset_;
00098    int localIndex=0;
00099 
00100    // For each entry in the base vector, translate its global ID
00101    // by the IndexOffset and load into this blockVector
00102    for (int i=0; i<BaseMap_.NumMyElements(); i++) {
00103       localIndex = this->Map().LID((IndexOffset + BaseMap_.GID(i)));
00104       if (localIndex==-1) { 
00105        cout << "Error in  BlockVector::GetBlock: " << i << " " 
00106       << IndexOffset << " " << BaseMap_.GID(i) << endl;
00107        return -1;
00108       }
00109       (*this)[localIndex] = BaseVector[i];
00110    }
00111 
00112    return 0;
00113 }   
00114 //=========================================================================
00115 int BlockVector::BlockSumIntoGlobalValues(int NumIndices, double* Values,
00116                                           int* Indices, int GlobalBlockRow)
00117 {
00118    int IndexOffset = GlobalBlockRow * Offset_;
00119    int localIndex=0;
00120 
00121    // For each entry in the base vector, translate its global ID
00122    // by the IndexOffset and load into this blockVector
00123    for (int i=0; i<NumIndices; i++) {
00124       localIndex = this->Map().LID((IndexOffset + Indices[i]));
00125       if (localIndex==-1) { 
00126        cout << "Error in  BlockVector::BlockSumIntoGlobalValues: " << i
00127                   << " " << IndexOffset << " " << Indices[i] << endl;
00128        return -1;
00129       }
00130       (*this)[localIndex] += Values[i];
00131    }
00132 
00133    return 0;
00134 }   
00135 //=========================================================================
00136 int BlockVector::BlockReplaceGlobalValues(int NumIndices, double* Values,
00137                                           int* Indices, int GlobalBlockRow)
00138 {
00139    int IndexOffset = GlobalBlockRow * Offset_;
00140    int localIndex=0;
00141 
00142    // For each entry in the base vector, translate its global ID
00143    // by the IndexOffset and load into this blockVector
00144    for (int i=0; i<NumIndices; i++) {
00145       localIndex = this->Map().LID((IndexOffset + Indices[i]));
00146       if (localIndex==-1) { 
00147        cout << "Error in  BlockVector::BlockReplaceGlobalValues: " << i
00148                   << " " << IndexOffset << " " << Indices[i] << endl;
00149        return -1;
00150       }
00151       (*this)[localIndex] = Values[i];
00152    }
00153 
00154    return 0;
00155 }   
00156 
00157 //=========================================================================
00158 Teuchos::RCP<const Epetra_Vector>
00159 BlockVector::GetBlock(int GlobalBlockRow) const
00160 {
00161   int offset = GlobalBlockRow * BaseMap_.NumMyElements();
00162   return Teuchos::rcp(new Epetra_Vector(View, BaseMap_, Values_+offset));
00163 }
00164 
00165 //=========================================================================
00166 Teuchos::RCP<Epetra_Vector>
00167 BlockVector::GetBlock(int GlobalBlockRow)
00168 {
00169   int offset = GlobalBlockRow * BaseMap_.NumMyElements();
00170   return Teuchos::rcp(new Epetra_Vector(View, BaseMap_, Values_+offset));
00171 }
00172 
00173 //=========================================================================
00174 const Epetra_BlockMap&
00175 BlockVector::GetBaseMap() const
00176 {
00177   return BaseMap_;
00178 }
00179 
00180 
00181 } //namespace EpetraExt

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