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00001 // This file is part of Eigen, a lightweight C++ template library 00002 // for linear algebra. 00003 // 00004 // Copyright (C) 2012 Désiré Nuentsa-Wakam <desire.nuentsa_wakam@inria.fr> 00005 // 00006 // This Source Code Form is subject to the terms of the Mozilla 00007 // Public License v. 2.0. If a copy of the MPL was not distributed 00008 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/. 00009 #ifndef SPARSELU_IMPL_H 00010 #define SPARSELU_IMPL_H 00011 00012 namespace Eigen { 00013 namespace internal { 00014 00019 template <typename Scalar, typename Index> 00020 class SparseLUImpl 00021 { 00022 public: 00023 typedef Matrix<Scalar,Dynamic,1> ScalarVector; 00024 typedef Matrix<Index,Dynamic,1> IndexVector; 00025 typedef typename ScalarVector::RealScalar RealScalar; 00026 typedef Ref<Matrix<Scalar,Dynamic,1> > BlockScalarVector; 00027 typedef Ref<Matrix<Index,Dynamic,1> > BlockIndexVector; 00028 typedef LU_GlobalLU_t<IndexVector, ScalarVector> GlobalLU_t; 00029 typedef SparseMatrix<Scalar,ColMajor,Index> MatrixType; 00030 00031 protected: 00032 template <typename VectorType> 00033 Index expand(VectorType& vec, Index& length, Index nbElts, Index keep_prev, Index& num_expansions); 00034 Index memInit(Index m, Index n, Index annz, Index lwork, Index fillratio, Index panel_size, GlobalLU_t& glu); 00035 template <typename VectorType> 00036 Index memXpand(VectorType& vec, Index& maxlen, Index nbElts, MemType memtype, Index& num_expansions); 00037 void heap_relax_snode (const Index n, IndexVector& et, const Index relax_columns, IndexVector& descendants, IndexVector& relax_end); 00038 void relax_snode (const Index n, IndexVector& et, const Index relax_columns, IndexVector& descendants, IndexVector& relax_end); 00039 Index snode_dfs(const Index jcol, const Index kcol,const MatrixType& mat, IndexVector& xprune, IndexVector& marker, GlobalLU_t& glu); 00040 Index snode_bmod (const Index jcol, const Index fsupc, ScalarVector& dense, GlobalLU_t& glu); 00041 Index pivotL(const Index jcol, const RealScalar& diagpivotthresh, IndexVector& perm_r, IndexVector& iperm_c, Index& pivrow, GlobalLU_t& glu); 00042 template <typename Traits> 00043 void dfs_kernel(const Index jj, IndexVector& perm_r, 00044 Index& nseg, IndexVector& panel_lsub, IndexVector& segrep, 00045 Ref<IndexVector> repfnz_col, IndexVector& xprune, Ref<IndexVector> marker, IndexVector& parent, 00046 IndexVector& xplore, GlobalLU_t& glu, Index& nextl_col, Index krow, Traits& traits); 00047 void panel_dfs(const Index m, const Index w, const Index jcol, MatrixType& A, IndexVector& perm_r, Index& nseg, ScalarVector& dense, IndexVector& panel_lsub, IndexVector& segrep, IndexVector& repfnz, IndexVector& xprune, IndexVector& marker, IndexVector& parent, IndexVector& xplore, GlobalLU_t& glu); 00048 00049 void panel_bmod(const Index m, const Index w, const Index jcol, const Index nseg, ScalarVector& dense, ScalarVector& tempv, IndexVector& segrep, IndexVector& repfnz, GlobalLU_t& glu); 00050 Index column_dfs(const Index m, const Index jcol, IndexVector& perm_r, Index maxsuper, Index& nseg, BlockIndexVector lsub_col, IndexVector& segrep, BlockIndexVector repfnz, IndexVector& xprune, IndexVector& marker, IndexVector& parent, IndexVector& xplore, GlobalLU_t& glu); 00051 Index column_bmod(const Index jcol, const Index nseg, BlockScalarVector dense, ScalarVector& tempv, BlockIndexVector segrep, BlockIndexVector repfnz, Index fpanelc, GlobalLU_t& glu); 00052 Index copy_to_ucol(const Index jcol, const Index nseg, IndexVector& segrep, BlockIndexVector repfnz ,IndexVector& perm_r, BlockScalarVector dense, GlobalLU_t& glu); 00053 void pruneL(const Index jcol, const IndexVector& perm_r, const Index pivrow, const Index nseg, const IndexVector& segrep, BlockIndexVector repfnz, IndexVector& xprune, GlobalLU_t& glu); 00054 void countnz(const Index n, Index& nnzL, Index& nnzU, GlobalLU_t& glu); 00055 void fixupL(const Index n, const IndexVector& perm_r, GlobalLU_t& glu); 00056 00057 template<typename , typename > 00058 friend struct column_dfs_traits; 00059 }; 00060 00061 } // end namespace internal 00062 } // namespace Eigen 00063 00064 #endif