mirror of
https://gitlab.com/libeigen/eigen.git
synced 2026-04-10 11:34:33 +08:00
74 lines
2.7 KiB
C
74 lines
2.7 KiB
C
|
// This file is part of Eigen, a lightweight C++ template library
|
||
|
|
// for linear algebra.
|
||
|
|
//
|
||
|
|
// Copyright (C) 2012 Désiré Nuentsa-Wakam <desire.nuentsa_wakam@inria.fr>
|
||
|
|
// Copyright (C) 2012 Gael Guennebaud <gael.guennebaud@inria.fr>
|
||
|
|
//
|
||
|
|
// Eigen 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 3 of the License, or (at your option) any later version.
|
||
|
|
//
|
||
|
|
// Alternatively, 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 2 of
|
||
|
|
// the License, or (at your option) any later version.
|
||
|
|
//
|
||
|
|
// Eigen 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 or the
|
||
|
|
// GNU General Public License for more details.
|
||
|
|
//
|
||
|
|
// You should have received a copy of the GNU Lesser General Public
|
||
|
|
// License and a copy of the GNU General Public License along with
|
||
|
|
// Eigen. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
|
||
|
|
#ifndef EIGEN_SPARSELU_MATRIX_H
|
||
|
|
#define EIGEN_SPARSELU_MATRIX_H
|
||
|
|
|
||
|
|
/** \ingroup SparseLU_Module
|
||
|
|
* \brief a class to manipulate the supernodal matrices in the SparseLU factorization
|
||
|
|
*
|
||
|
|
* This class extends the class SparseMatrix and should contain the data to easily store
|
||
|
|
* and manipulate the supernodes during the factorization and solution phase of Sparse LU.
|
||
|
|
* Only the lower triangular matrix has supernodes.
|
||
|
|
*
|
||
|
|
* NOTE : This class corresponds to the SCformat structure in SuperLU
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
template <typename _Scalar, typename _Index>
|
||
|
|
class SuperNodalMatrix
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
SCMatrix()
|
||
|
|
{
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
~SCMatrix()
|
||
|
|
{
|
||
|
|
|
||
|
|
}
|
||
|
|
operator SparseMatrix();
|
||
|
|
|
||
|
|
protected:
|
||
|
|
Index nnz; // Number of nonzero values
|
||
|
|
Index nsupper; // Index of the last supernode
|
||
|
|
Scalar *nzval; //array of nonzero values packed by (supernode ??) column
|
||
|
|
Index *nzval_colptr; //nzval_colptr[j] Stores the location in nzval[] which starts column j
|
||
|
|
Index *rowind; // Array of compressed row indices of rectangular supernodes
|
||
|
|
Index rowind_colptr; //rowind_colptr[j] stores the location in rowind[] which starts column j
|
||
|
|
Index *col_to_sup; // col_to_sup[j] is the supernode number to which column j belongs
|
||
|
|
Index *sup_to_col; //sup_to_col[s] points to the starting column of the s-th supernode
|
||
|
|
// Index *nzval_colptr corresponds to m_outerIndex in SparseMatrix
|
||
|
|
|
||
|
|
private :
|
||
|
|
SuperNodalMatrix(SparseMatrix& ) {}
|
||
|
|
};
|
||
|
|
|
||
|
|
SuperNodalMatrix::operator SparseMatrix()
|
||
|
|
{
|
||
|
|
|
||
|
|
}
|
||
|
|
#endif
|