10 #ifndef EIGEN_SPARSEASSIGN_H 11 #define EIGEN_SPARSEASSIGN_H 15 template<
typename Derived>
16 template<
typename OtherDerived>
17 Derived& SparseMatrixBase<Derived>::operator=(
const EigenBase<OtherDerived> &other)
19 internal::call_assignment_no_alias(derived(), other.derived());
23 template<
typename Derived>
24 template<
typename OtherDerived>
25 Derived& SparseMatrixBase<Derived>::operator=(
const ReturnByValue<OtherDerived>& other)
28 other.evalTo(derived());
32 template<
typename Derived>
33 template<
typename OtherDerived>
34 inline Derived& SparseMatrixBase<Derived>::operator=(
const SparseMatrixBase<OtherDerived>& other)
37 internal::Assignment<Derived,OtherDerived,internal::assign_op<Scalar> >
38 ::run(derived(), other.derived(), internal::assign_op<Scalar>());
42 template<
typename Derived>
43 inline Derived& SparseMatrixBase<Derived>::operator=(
const Derived& other)
45 internal::call_assignment_no_alias(derived(), other.derived());
52 struct storage_kind_to_evaluator_kind<Sparse> {
53 typedef IteratorBased Kind;
57 struct storage_kind_to_shape<Sparse> {
58 typedef SparseShape Shape;
61 struct Sparse2Sparse {};
62 struct Sparse2Dense {};
64 template<>
struct AssignmentKind<SparseShape, SparseShape> {
typedef Sparse2Sparse Kind; };
65 template<>
struct AssignmentKind<SparseShape, SparseTriangularShape> {
typedef Sparse2Sparse Kind; };
66 template<>
struct AssignmentKind<DenseShape, SparseShape> {
typedef Sparse2Dense Kind; };
67 template<>
struct AssignmentKind<DenseShape, SparseTriangularShape> {
typedef Sparse2Dense Kind; };
70 template<
typename DstXprType,
typename SrcXprType>
71 void assign_sparse_to_sparse(DstXprType &dst,
const SrcXprType &src)
73 typedef typename DstXprType::Scalar Scalar;
74 typedef internal::evaluator<DstXprType> DstEvaluatorType;
75 typedef internal::evaluator<SrcXprType> SrcEvaluatorType;
77 SrcEvaluatorType srcEvaluator(src);
80 const Index outerEvaluationSize = (SrcEvaluatorType::Flags&
RowMajorBit) ? src.rows() : src.cols();
81 if ((!transpose) && src.isRValue())
84 dst.resize(src.rows(), src.cols());
86 dst.reserve((std::max)(src.rows(),src.cols())*2);
87 for (Index j=0; j<outerEvaluationSize; ++j)
90 for (
typename SrcEvaluatorType::InnerIterator it(srcEvaluator, j); it; ++it)
92 Scalar v = it.value();
93 dst.insertBackByOuterInner(j,it.index()) = v;
101 eigen_assert(( ((internal::traits<DstXprType>::SupportedAccessPatterns & OuterRandomAccessPattern)==OuterRandomAccessPattern) ||
102 (!((DstEvaluatorType::Flags & RowMajorBit) != (SrcEvaluatorType::Flags & RowMajorBit)))) &&
103 "the transpose operation is supposed to be handled in SparseMatrix::operator=");
105 enum { Flip = (DstEvaluatorType::Flags &
RowMajorBit) != (SrcEvaluatorType::Flags & RowMajorBit) };
108 DstXprType temp(src.rows(), src.cols());
110 temp.reserve((std::max)(src.rows(),src.cols())*2);
111 for (Index j=0; j<outerEvaluationSize; ++j)
114 for (
typename SrcEvaluatorType::InnerIterator it(srcEvaluator, j); it; ++it)
116 Scalar v = it.value();
117 temp.insertBackByOuterInner(Flip?it.index():j,Flip?j:it.index()) = v;
122 dst = temp.markAsRValue();
127 template<
typename DstXprType,
typename SrcXprType,
typename Functor,
typename Scalar>
128 struct Assignment<DstXprType, SrcXprType, Functor, Sparse2Sparse, Scalar>
130 static void run(DstXprType &dst,
const SrcXprType &src,
const internal::assign_op<typename DstXprType::Scalar> &)
132 assign_sparse_to_sparse(dst.derived(), src.derived());
137 template<
typename DstXprType,
typename SrcXprType,
typename Functor,
typename Scalar>
138 struct Assignment<DstXprType, SrcXprType, Functor, Sparse2Dense, Scalar>
140 static void run(DstXprType &dst,
const SrcXprType &src,
const Functor &func)
142 eigen_assert(dst.rows() == src.rows() && dst.cols() == src.cols());
144 if(internal::is_same<Functor,internal::assign_op<Scalar> >::value)
147 internal::evaluator<SrcXprType> srcEval(src);
148 internal::evaluator<DstXprType> dstEval(dst);
149 const Index outerEvaluationSize = (internal::evaluator<SrcXprType>::Flags&
RowMajorBit) ? src.rows() : src.cols();
150 for (Index j=0; j<outerEvaluationSize; ++j)
151 for (
typename internal::evaluator<SrcXprType>::InnerIterator i(srcEval,j); i; ++i)
152 func.assignCoeff(dstEval.coeffRef(i.row(),i.col()), i.value());
158 template<
typename DstXprType,
typename DecType,
typename RhsType,
typename Scalar>
159 struct Assignment<DstXprType, Solve<DecType,RhsType>,
internal::assign_op<Scalar>, Sparse2Sparse, Scalar>
161 typedef Solve<DecType,RhsType> SrcXprType;
162 static void run(DstXprType &dst,
const SrcXprType &src,
const internal::assign_op<Scalar> &)
164 src.dec()._solve_impl(src.rhs(), dst);
168 struct Diagonal2Sparse {};
170 template<>
struct AssignmentKind<SparseShape,DiagonalShape> {
typedef Diagonal2Sparse Kind; };
172 template<
typename DstXprType,
typename SrcXprType,
typename Functor,
typename Scalar>
173 struct Assignment<DstXprType, SrcXprType, Functor, Diagonal2Sparse, Scalar>
175 typedef typename DstXprType::StorageIndex StorageIndex;
176 typedef Array<StorageIndex,Dynamic,1> ArrayXI;
177 typedef Array<Scalar,Dynamic,1> ArrayXS;
178 template<
int Options>
179 static void run(SparseMatrix<Scalar,Options,StorageIndex> &dst,
const SrcXprType &src,
const internal::assign_op<typename DstXprType::Scalar> &)
181 Index size = src.diagonal().size();
182 dst.makeCompressed();
183 dst.resizeNonZeros(size);
184 Map<ArrayXI>(dst.innerIndexPtr(), size).setLinSpaced(0,StorageIndex(size)-1);
185 Map<ArrayXI>(dst.outerIndexPtr(), size+1).setLinSpaced(0,StorageIndex(size));
186 Map<ArrayXS>(dst.valuePtr(), size) = src.diagonal();
189 template<
typename DstDerived>
190 static void run(SparseMatrixBase<DstDerived> &dst,
const SrcXprType &src,
const internal::assign_op<typename DstXprType::Scalar> &)
192 dst.diagonal() = src.diagonal();
195 static void run(DstXprType &dst,
const SrcXprType &src,
const internal::add_assign_op<typename DstXprType::Scalar> &)
196 { dst.diagonal() += src.diagonal(); }
198 static void run(DstXprType &dst,
const SrcXprType &src,
const internal::sub_assign_op<typename DstXprType::Scalar> &)
199 { dst.diagonal() -= src.diagonal(); }
205 #endif // EIGEN_SPARSEASSIGN_H
const unsigned int RowMajorBit
Definition: Constants.h:61
Definition: Eigen_Colamd.h:54