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| | #ifndef EIGEN_SPARSEVIEW_H |
| | #define EIGEN_SPARSEVIEW_H |
| |
|
| | namespace Eigen { |
| |
|
| | namespace internal { |
| |
|
| | template<typename MatrixType> |
| | struct traits<SparseView<MatrixType> > : traits<MatrixType> |
| | { |
| | typedef typename MatrixType::StorageIndex StorageIndex; |
| | typedef Sparse StorageKind; |
| | enum { |
| | Flags = int(traits<MatrixType>::Flags) & (RowMajorBit) |
| | }; |
| | }; |
| |
|
| | } |
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| | template<typename MatrixType> |
| | class SparseView : public SparseMatrixBase<SparseView<MatrixType> > |
| | { |
| | typedef typename MatrixType::Nested MatrixTypeNested; |
| | typedef typename internal::remove_all<MatrixTypeNested>::type _MatrixTypeNested; |
| | typedef SparseMatrixBase<SparseView > Base; |
| | public: |
| | EIGEN_SPARSE_PUBLIC_INTERFACE(SparseView) |
| | typedef typename internal::remove_all<MatrixType>::type NestedExpression; |
| |
|
| | explicit SparseView(const MatrixType& mat, const Scalar& reference = Scalar(0), |
| | const RealScalar &epsilon = NumTraits<Scalar>::dummy_precision()) |
| | : m_matrix(mat), m_reference(reference), m_epsilon(epsilon) {} |
| |
|
| | inline Index rows() const { return m_matrix.rows(); } |
| | inline Index cols() const { return m_matrix.cols(); } |
| |
|
| | inline Index innerSize() const { return m_matrix.innerSize(); } |
| | inline Index outerSize() const { return m_matrix.outerSize(); } |
| | |
| | |
| | const typename internal::remove_all<MatrixTypeNested>::type& |
| | nestedExpression() const { return m_matrix; } |
| | |
| | Scalar reference() const { return m_reference; } |
| | RealScalar epsilon() const { return m_epsilon; } |
| | |
| | protected: |
| | MatrixTypeNested m_matrix; |
| | Scalar m_reference; |
| | RealScalar m_epsilon; |
| | }; |
| |
|
| | namespace internal { |
| |
|
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| | |
| | |
| | template<typename ArgType> |
| | struct unary_evaluator<SparseView<ArgType>, IteratorBased> |
| | : public evaluator_base<SparseView<ArgType> > |
| | { |
| | typedef typename evaluator<ArgType>::InnerIterator EvalIterator; |
| | public: |
| | typedef SparseView<ArgType> XprType; |
| | |
| | class InnerIterator : public EvalIterator |
| | { |
| | protected: |
| | typedef typename XprType::Scalar Scalar; |
| | public: |
| |
|
| | EIGEN_STRONG_INLINE InnerIterator(const unary_evaluator& sve, Index outer) |
| | : EvalIterator(sve.m_argImpl,outer), m_view(sve.m_view) |
| | { |
| | incrementToNonZero(); |
| | } |
| |
|
| | EIGEN_STRONG_INLINE InnerIterator& operator++() |
| | { |
| | EvalIterator::operator++(); |
| | incrementToNonZero(); |
| | return *this; |
| | } |
| |
|
| | using EvalIterator::value; |
| |
|
| | protected: |
| | const XprType &m_view; |
| |
|
| | private: |
| | void incrementToNonZero() |
| | { |
| | while((bool(*this)) && internal::isMuchSmallerThan(value(), m_view.reference(), m_view.epsilon())) |
| | { |
| | EvalIterator::operator++(); |
| | } |
| | } |
| | }; |
| | |
| | enum { |
| | CoeffReadCost = evaluator<ArgType>::CoeffReadCost, |
| | Flags = XprType::Flags |
| | }; |
| | |
| | explicit unary_evaluator(const XprType& xpr) : m_argImpl(xpr.nestedExpression()), m_view(xpr) {} |
| |
|
| | protected: |
| | evaluator<ArgType> m_argImpl; |
| | const XprType &m_view; |
| | }; |
| |
|
| | template<typename ArgType> |
| | struct unary_evaluator<SparseView<ArgType>, IndexBased> |
| | : public evaluator_base<SparseView<ArgType> > |
| | { |
| | public: |
| | typedef SparseView<ArgType> XprType; |
| | protected: |
| | enum { IsRowMajor = (XprType::Flags&RowMajorBit)==RowMajorBit }; |
| | typedef typename XprType::Scalar Scalar; |
| | typedef typename XprType::StorageIndex StorageIndex; |
| | public: |
| | |
| | class InnerIterator |
| | { |
| | public: |
| |
|
| | EIGEN_STRONG_INLINE InnerIterator(const unary_evaluator& sve, Index outer) |
| | : m_sve(sve), m_inner(0), m_outer(outer), m_end(sve.m_view.innerSize()) |
| | { |
| | incrementToNonZero(); |
| | } |
| |
|
| | EIGEN_STRONG_INLINE InnerIterator& operator++() |
| | { |
| | m_inner++; |
| | incrementToNonZero(); |
| | return *this; |
| | } |
| |
|
| | EIGEN_STRONG_INLINE Scalar value() const |
| | { |
| | return (IsRowMajor) ? m_sve.m_argImpl.coeff(m_outer, m_inner) |
| | : m_sve.m_argImpl.coeff(m_inner, m_outer); |
| | } |
| |
|
| | EIGEN_STRONG_INLINE StorageIndex index() const { return m_inner; } |
| | inline Index row() const { return IsRowMajor ? m_outer : index(); } |
| | inline Index col() const { return IsRowMajor ? index() : m_outer; } |
| |
|
| | EIGEN_STRONG_INLINE operator bool() const { return m_inner < m_end && m_inner>=0; } |
| |
|
| | protected: |
| | const unary_evaluator &m_sve; |
| | Index m_inner; |
| | const Index m_outer; |
| | const Index m_end; |
| |
|
| | private: |
| | void incrementToNonZero() |
| | { |
| | while((bool(*this)) && internal::isMuchSmallerThan(value(), m_sve.m_view.reference(), m_sve.m_view.epsilon())) |
| | { |
| | m_inner++; |
| | } |
| | } |
| | }; |
| | |
| | enum { |
| | CoeffReadCost = evaluator<ArgType>::CoeffReadCost, |
| | Flags = XprType::Flags |
| | }; |
| | |
| | explicit unary_evaluator(const XprType& xpr) : m_argImpl(xpr.nestedExpression()), m_view(xpr) {} |
| |
|
| | protected: |
| | evaluator<ArgType> m_argImpl; |
| | const XprType &m_view; |
| | }; |
| |
|
| | } |
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| | template<typename Derived> |
| | const SparseView<Derived> MatrixBase<Derived>::sparseView(const Scalar& reference, |
| | const typename NumTraits<Scalar>::Real& epsilon) const |
| | { |
| | return SparseView<Derived>(derived(), reference, epsilon); |
| | } |
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| | template<typename Derived> |
| | const SparseView<Derived> |
| | SparseMatrixBase<Derived>::pruned(const Scalar& reference, |
| | const RealScalar& epsilon) const |
| | { |
| | return SparseView<Derived>(derived(), reference, epsilon); |
| | } |
| |
|
| | } |
| |
|
| | #endif |
| |
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