1 // This file is part of Eigen, a lightweight C++ template library 2 // for linear algebra. 3 // 4 // Copyright (C) 2008-2009 Gael Guennebaud <gael.guennebaud@inria.fr> 5 // 6 // This Source Code Form is subject to the terms of the Mozilla 7 // Public License v. 2.0. If a copy of the MPL was not distributed 8 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/. 9 10 #ifndef EIGEN_SPARSE_BLOCKFORDYNAMICMATRIX_H 11 #define EIGEN_SPARSE_BLOCKFORDYNAMICMATRIX_H 12 13 namespace Eigen { 14 15 #if 0 16 17 // NOTE Have to be reimplemented as a specialization of BlockImpl< DynamicSparseMatrix<_Scalar, _Options, _Index>, ... > 18 // See SparseBlock.h for an example 19 20 21 /*************************************************************************** 22 * specialisation for DynamicSparseMatrix 23 ***************************************************************************/ 24 25 template<typename _Scalar, int _Options, typename _Index, int Size> 26 class SparseInnerVectorSet<DynamicSparseMatrix<_Scalar, _Options, _Index>, Size> 27 : public SparseMatrixBase<SparseInnerVectorSet<DynamicSparseMatrix<_Scalar, _Options, _Index>, Size> > 28 { 29 typedef DynamicSparseMatrix<_Scalar, _Options, _Index> MatrixType; 30 public: 31 32 enum { IsRowMajor = internal::traits<SparseInnerVectorSet>::IsRowMajor }; 33 34 EIGEN_SPARSE_PUBLIC_INTERFACE(SparseInnerVectorSet) 35 class InnerIterator: public MatrixType::InnerIterator 36 { 37 public: 38 inline InnerIterator(const SparseInnerVectorSet& xpr, Index outer) 39 : MatrixType::InnerIterator(xpr.m_matrix, xpr.m_outerStart + outer), m_outer(outer) 40 {} 41 inline Index row() const { return IsRowMajor ? m_outer : this->index(); } 42 inline Index col() const { return IsRowMajor ? this->index() : m_outer; } 43 protected: 44 Index m_outer; 45 }; 46 47 inline SparseInnerVectorSet(const MatrixType& matrix, Index outerStart, Index outerSize) 48 : m_matrix(matrix), m_outerStart(outerStart), m_outerSize(outerSize) 49 { 50 eigen_assert( (outerStart>=0) && ((outerStart+outerSize)<=matrix.outerSize()) ); 51 } 52 53 inline SparseInnerVectorSet(const MatrixType& matrix, Index outer) 54 : m_matrix(matrix), m_outerStart(outer), m_outerSize(Size) 55 { 56 eigen_assert(Size!=Dynamic); 57 eigen_assert( (outer>=0) && (outer<matrix.outerSize()) ); 58 } 59 60 template<typename OtherDerived> 61 inline SparseInnerVectorSet& operator=(const SparseMatrixBase<OtherDerived>& other) 62 { 63 if (IsRowMajor != ((OtherDerived::Flags&RowMajorBit)==RowMajorBit)) 64 { 65 // need to transpose => perform a block evaluation followed by a big swap 66 DynamicSparseMatrix<Scalar,IsRowMajor?RowMajorBit:0> aux(other); 67 *this = aux.markAsRValue(); 68 } 69 else 70 { 71 // evaluate/copy vector per vector 72 for (Index j=0; j<m_outerSize.value(); ++j) 73 { 74 SparseVector<Scalar,IsRowMajor ? RowMajorBit : 0> aux(other.innerVector(j)); 75 m_matrix.const_cast_derived()._data()[m_outerStart+j].swap(aux._data()); 76 } 77 } 78 return *this; 79 } 80 81 inline SparseInnerVectorSet& operator=(const SparseInnerVectorSet& other) 82 { 83 return operator=<SparseInnerVectorSet>(other); 84 } 85 86 Index nonZeros() const 87 { 88 Index count = 0; 89 for (Index j=0; j<m_outerSize.value(); ++j) 90 count += m_matrix._data()[m_outerStart+j].size(); 91 return count; 92 } 93 94 const Scalar& lastCoeff() const 95 { 96 EIGEN_STATIC_ASSERT_VECTOR_ONLY(SparseInnerVectorSet); 97 eigen_assert(m_matrix.data()[m_outerStart].size()>0); 98 return m_matrix.data()[m_outerStart].vale(m_matrix.data()[m_outerStart].size()-1); 99 } 100 101 // template<typename Sparse> 102 // inline SparseInnerVectorSet& operator=(const SparseMatrixBase<OtherDerived>& other) 103 // { 104 // return *this; 105 // } 106 107 EIGEN_STRONG_INLINE Index rows() const { return IsRowMajor ? m_outerSize.value() : m_matrix.rows(); } 108 EIGEN_STRONG_INLINE Index cols() const { return IsRowMajor ? m_matrix.cols() : m_outerSize.value(); } 109 110 protected: 111 112 const typename MatrixType::Nested m_matrix; 113 Index m_outerStart; 114 const internal::variable_if_dynamic<Index, Size> m_outerSize; 115 116 }; 117 118 #endif 119 120 } // end namespace Eigen 121 122 #endif // EIGEN_SPARSE_BLOCKFORDYNAMICMATRIX_H 123