| // This file is part of Eigen, a lightweight C++ template library |
| // for linear algebra. |
| // |
| // Copyright (C) 2008-2009 Gael Guennebaud <gael.guennebaud@inria.fr> |
| // |
| // This Source Code Form is subject to the terms of the Mozilla |
| // Public License v. 2.0. If a copy of the MPL was not distributed |
| // with this file, You can obtain one at http://mozilla.org/MPL/2.0/. |
| |
| #ifndef EIGEN_SPARSE_BLOCK_H |
| #define EIGEN_SPARSE_BLOCK_H |
| |
| namespace Eigen { |
| |
| template<typename XprType, int BlockRows, int BlockCols> |
| class BlockImpl<XprType,BlockRows,BlockCols,true,Sparse> |
| : public SparseMatrixBase<Block<XprType,BlockRows,BlockCols,true> > |
| { |
| typedef typename internal::remove_all<typename XprType::Nested>::type _MatrixTypeNested; |
| typedef Block<XprType, BlockRows, BlockCols, true> BlockType; |
| public: |
| enum { IsRowMajor = internal::traits<BlockType>::IsRowMajor }; |
| protected: |
| enum { OuterSize = IsRowMajor ? BlockRows : BlockCols }; |
| public: |
| EIGEN_SPARSE_PUBLIC_INTERFACE(BlockType) |
| |
| class InnerIterator: public XprType::InnerIterator |
| { |
| typedef typename BlockImpl::Index Index; |
| public: |
| inline InnerIterator(const BlockType& xpr, Index outer) |
| : XprType::InnerIterator(xpr.m_matrix, xpr.m_outerStart + outer), m_outer(outer) |
| {} |
| inline Index row() const { return IsRowMajor ? m_outer : this->index(); } |
| inline Index col() const { return IsRowMajor ? this->index() : m_outer; } |
| protected: |
| Index m_outer; |
| }; |
| class ReverseInnerIterator: public XprType::ReverseInnerIterator |
| { |
| typedef typename BlockImpl::Index Index; |
| public: |
| inline ReverseInnerIterator(const BlockType& xpr, Index outer) |
| : XprType::ReverseInnerIterator(xpr.m_matrix, xpr.m_outerStart + outer), m_outer(outer) |
| {} |
| inline Index row() const { return IsRowMajor ? m_outer : this->index(); } |
| inline Index col() const { return IsRowMajor ? this->index() : m_outer; } |
| protected: |
| Index m_outer; |
| }; |
| |
| inline BlockImpl(const XprType& xpr, int i) |
| : m_matrix(xpr), m_outerStart(i), m_outerSize(OuterSize) |
| {} |
| |
| inline BlockImpl(const XprType& xpr, int startRow, int startCol, int blockRows, int blockCols) |
| : m_matrix(xpr), m_outerStart(IsRowMajor ? startRow : startCol), m_outerSize(IsRowMajor ? blockRows : blockCols) |
| {} |
| |
| EIGEN_STRONG_INLINE Index rows() const { return IsRowMajor ? m_outerSize.value() : m_matrix.rows(); } |
| EIGEN_STRONG_INLINE Index cols() const { return IsRowMajor ? m_matrix.cols() : m_outerSize.value(); } |
| |
| Index nonZeros() const |
| { |
| Index nnz = 0; |
| Index end = m_outerStart + m_outerSize.value(); |
| for(int j=m_outerStart; j<end; ++j) |
| for(typename XprType::InnerIterator it(m_matrix, j); it; ++it) |
| ++nnz; |
| return nnz; |
| } |
| |
| protected: |
| |
| typename XprType::Nested m_matrix; |
| Index m_outerStart; |
| const internal::variable_if_dynamic<Index, OuterSize> m_outerSize; |
| |
| public: |
| EIGEN_INHERIT_ASSIGNMENT_OPERATORS(BlockImpl) |
| }; |
| |
| |
| /*************************************************************************** |
| * specialization for SparseMatrix |
| ***************************************************************************/ |
| |
| namespace internal { |
| |
| template<typename SparseMatrixType, int BlockRows, int BlockCols> |
| class sparse_matrix_block_impl |
| : public SparseMatrixBase<Block<SparseMatrixType,BlockRows,BlockCols,true> > |
| { |
| typedef typename internal::remove_all<typename SparseMatrixType::Nested>::type _MatrixTypeNested; |
| typedef Block<SparseMatrixType, BlockRows, BlockCols, true> BlockType; |
| public: |
| enum { IsRowMajor = internal::traits<BlockType>::IsRowMajor }; |
| EIGEN_SPARSE_PUBLIC_INTERFACE(BlockType) |
| protected: |
| enum { OuterSize = IsRowMajor ? BlockRows : BlockCols }; |
| public: |
| |
| class InnerIterator: public SparseMatrixType::InnerIterator |
| { |
| public: |
| inline InnerIterator(const BlockType& xpr, Index outer) |
| : SparseMatrixType::InnerIterator(xpr.m_matrix, xpr.m_outerStart + outer), m_outer(outer) |
| {} |
| inline Index row() const { return IsRowMajor ? m_outer : this->index(); } |
| inline Index col() const { return IsRowMajor ? this->index() : m_outer; } |
| protected: |
| Index m_outer; |
| }; |
| class ReverseInnerIterator: public SparseMatrixType::ReverseInnerIterator |
| { |
| public: |
| inline ReverseInnerIterator(const BlockType& xpr, Index outer) |
| : SparseMatrixType::ReverseInnerIterator(xpr.m_matrix, xpr.m_outerStart + outer), m_outer(outer) |
| {} |
| inline Index row() const { return IsRowMajor ? m_outer : this->index(); } |
| inline Index col() const { return IsRowMajor ? this->index() : m_outer; } |
| protected: |
| Index m_outer; |
| }; |
| |
| inline sparse_matrix_block_impl(const SparseMatrixType& xpr, int i) |
| : m_matrix(xpr), m_outerStart(i), m_outerSize(OuterSize) |
| {} |
| |
| inline sparse_matrix_block_impl(const SparseMatrixType& xpr, int startRow, int startCol, int blockRows, int blockCols) |
| : m_matrix(xpr), m_outerStart(IsRowMajor ? startRow : startCol), m_outerSize(IsRowMajor ? blockRows : blockCols) |
| {} |
| |
| template<typename OtherDerived> |
| inline BlockType& operator=(const SparseMatrixBase<OtherDerived>& other) |
| { |
| typedef typename internal::remove_all<typename SparseMatrixType::Nested>::type _NestedMatrixType; |
| _NestedMatrixType& matrix = const_cast<_NestedMatrixType&>(m_matrix);; |
| // This assignment is slow if this vector set is not empty |
| // and/or it is not at the end of the nonzeros of the underlying matrix. |
| |
| // 1 - eval to a temporary to avoid transposition and/or aliasing issues |
| SparseMatrix<Scalar, IsRowMajor ? RowMajor : ColMajor, Index> tmp(other); |
| |
| // 2 - let's check whether there is enough allocated memory |
| Index nnz = tmp.nonZeros(); |
| Index start = m_outerStart==0 ? 0 : matrix.outerIndexPtr()[m_outerStart]; // starting position of the current block |
| Index end = m_matrix.outerIndexPtr()[m_outerStart+m_outerSize.value()]; // ending position of the current block |
| Index block_size = end - start; // available room in the current block |
| Index tail_size = m_matrix.outerIndexPtr()[m_matrix.outerSize()] - end; |
| |
| Index free_size = m_matrix.isCompressed() |
| ? Index(matrix.data().allocatedSize()) + block_size |
| : block_size; |
| |
| if(nnz>free_size) |
| { |
| // realloc manually to reduce copies |
| typename SparseMatrixType::Storage newdata(m_matrix.data().allocatedSize() - block_size + nnz); |
| |
| internal::smart_copy(&m_matrix.data().value(0), &m_matrix.data().value(0) + start, &newdata.value(0)); |
| internal::smart_copy(&m_matrix.data().index(0), &m_matrix.data().index(0) + start, &newdata.index(0)); |
| |
| internal::smart_copy(&tmp.data().value(0), &tmp.data().value(0) + nnz, &newdata.value(start)); |
| internal::smart_copy(&tmp.data().index(0), &tmp.data().index(0) + nnz, &newdata.index(start)); |
| |
| internal::smart_copy(&matrix.data().value(end), &matrix.data().value(end) + tail_size, &newdata.value(start+nnz)); |
| internal::smart_copy(&matrix.data().index(end), &matrix.data().index(end) + tail_size, &newdata.index(start+nnz)); |
| |
| newdata.resize(m_matrix.outerIndexPtr()[m_matrix.outerSize()] - block_size + nnz); |
| |
| matrix.data().swap(newdata); |
| } |
| else |
| { |
| // no need to realloc, simply copy the tail at its respective position and insert tmp |
| matrix.data().resize(start + nnz + tail_size); |
| |
| internal::smart_memmove(&matrix.data().value(end), &matrix.data().value(end) + tail_size, &matrix.data().value(start + nnz)); |
| internal::smart_memmove(&matrix.data().index(end), &matrix.data().index(end) + tail_size, &matrix.data().index(start + nnz)); |
| |
| internal::smart_copy(&tmp.data().value(0), &tmp.data().value(0) + nnz, &matrix.data().value(start)); |
| internal::smart_copy(&tmp.data().index(0), &tmp.data().index(0) + nnz, &matrix.data().index(start)); |
| } |
| |
| // update innerNonZeros |
| if(!m_matrix.isCompressed()) |
| for(Index j=0; j<m_outerSize.value(); ++j) |
| matrix.innerNonZeroPtr()[m_outerStart+j] = tmp.innerVector(j).nonZeros(); |
| |
| // update outer index pointers |
| Index p = start; |
| for(Index k=0; k<m_outerSize.value(); ++k) |
| { |
| matrix.outerIndexPtr()[m_outerStart+k] = p; |
| p += tmp.innerVector(k).nonZeros(); |
| } |
| std::ptrdiff_t offset = nnz - block_size; |
| for(Index k = m_outerStart + m_outerSize.value(); k<=matrix.outerSize(); ++k) |
| { |
| matrix.outerIndexPtr()[k] += offset; |
| } |
| |
| return derived(); |
| } |
| |
| inline BlockType& operator=(const BlockType& other) |
| { |
| return operator=<BlockType>(other); |
| } |
| |
| inline const Scalar* valuePtr() const |
| { return m_matrix.valuePtr() + m_matrix.outerIndexPtr()[m_outerStart]; } |
| inline Scalar* valuePtr() |
| { return m_matrix.const_cast_derived().valuePtr() + m_matrix.outerIndexPtr()[m_outerStart]; } |
| |
| inline const Index* innerIndexPtr() const |
| { return m_matrix.innerIndexPtr() + m_matrix.outerIndexPtr()[m_outerStart]; } |
| inline Index* innerIndexPtr() |
| { return m_matrix.const_cast_derived().innerIndexPtr() + m_matrix.outerIndexPtr()[m_outerStart]; } |
| |
| inline const Index* outerIndexPtr() const |
| { return m_matrix.outerIndexPtr() + m_outerStart; } |
| inline Index* outerIndexPtr() |
| { return m_matrix.const_cast_derived().outerIndexPtr() + m_outerStart; } |
| |
| Index nonZeros() const |
| { |
| if(m_matrix.isCompressed()) |
| return std::size_t(m_matrix.outerIndexPtr()[m_outerStart+m_outerSize.value()]) |
| - std::size_t(m_matrix.outerIndexPtr()[m_outerStart]); |
| else if(m_outerSize.value()==0) |
| return 0; |
| else |
| return Map<const Matrix<Index,OuterSize,1> >(m_matrix.innerNonZeroPtr()+m_outerStart, m_outerSize.value()).sum(); |
| } |
| |
| const Scalar& lastCoeff() const |
| { |
| EIGEN_STATIC_ASSERT_VECTOR_ONLY(sparse_matrix_block_impl); |
| eigen_assert(nonZeros()>0); |
| if(m_matrix.isCompressed()) |
| return m_matrix.valuePtr()[m_matrix.outerIndexPtr()[m_outerStart+1]-1]; |
| else |
| return m_matrix.valuePtr()[m_matrix.outerIndexPtr()[m_outerStart]+m_matrix.innerNonZeroPtr()[m_outerStart]-1]; |
| } |
| |
| EIGEN_STRONG_INLINE Index rows() const { return IsRowMajor ? m_outerSize.value() : m_matrix.rows(); } |
| EIGEN_STRONG_INLINE Index cols() const { return IsRowMajor ? m_matrix.cols() : m_outerSize.value(); } |
| |
| protected: |
| |
| typename SparseMatrixType::Nested m_matrix; |
| Index m_outerStart; |
| const internal::variable_if_dynamic<Index, OuterSize> m_outerSize; |
| |
| }; |
| |
| } // namespace internal |
| |
| template<typename _Scalar, int _Options, typename _Index, int BlockRows, int BlockCols> |
| class BlockImpl<SparseMatrix<_Scalar, _Options, _Index>,BlockRows,BlockCols,true,Sparse> |
| : public internal::sparse_matrix_block_impl<SparseMatrix<_Scalar, _Options, _Index>,BlockRows,BlockCols> |
| { |
| public: |
| typedef SparseMatrix<_Scalar, _Options, _Index> SparseMatrixType; |
| typedef internal::sparse_matrix_block_impl<SparseMatrixType,BlockRows,BlockCols> Base; |
| inline BlockImpl(SparseMatrixType& xpr, int i) |
| : Base(xpr, i) |
| {} |
| |
| inline BlockImpl(SparseMatrixType& xpr, int startRow, int startCol, int blockRows, int blockCols) |
| : Base(xpr, startRow, startCol, blockRows, blockCols) |
| {} |
| |
| using Base::operator=; |
| }; |
| |
| template<typename _Scalar, int _Options, typename _Index, int BlockRows, int BlockCols> |
| class BlockImpl<const SparseMatrix<_Scalar, _Options, _Index>,BlockRows,BlockCols,true,Sparse> |
| : public internal::sparse_matrix_block_impl<const SparseMatrix<_Scalar, _Options, _Index>,BlockRows,BlockCols> |
| { |
| public: |
| typedef const SparseMatrix<_Scalar, _Options, _Index> SparseMatrixType; |
| typedef internal::sparse_matrix_block_impl<SparseMatrixType,BlockRows,BlockCols> Base; |
| inline BlockImpl(SparseMatrixType& xpr, int i) |
| : Base(xpr, i) |
| {} |
| |
| inline BlockImpl(SparseMatrixType& xpr, int startRow, int startCol, int blockRows, int blockCols) |
| : Base(xpr, startRow, startCol, blockRows, blockCols) |
| {} |
| |
| using Base::operator=; |
| }; |
| |
| //---------- |
| |
| /** \returns the \a outer -th column (resp. row) of the matrix \c *this if \c *this |
| * is col-major (resp. row-major). |
| */ |
| template<typename Derived> |
| typename SparseMatrixBase<Derived>::InnerVectorReturnType SparseMatrixBase<Derived>::innerVector(Index outer) |
| { return InnerVectorReturnType(derived(), outer); } |
| |
| /** \returns the \a outer -th column (resp. row) of the matrix \c *this if \c *this |
| * is col-major (resp. row-major). Read-only. |
| */ |
| template<typename Derived> |
| const typename SparseMatrixBase<Derived>::ConstInnerVectorReturnType SparseMatrixBase<Derived>::innerVector(Index outer) const |
| { return ConstInnerVectorReturnType(derived(), outer); } |
| |
| /** \returns the \a outer -th column (resp. row) of the matrix \c *this if \c *this |
| * is col-major (resp. row-major). |
| */ |
| template<typename Derived> |
| Block<Derived,Dynamic,Dynamic,true> SparseMatrixBase<Derived>::innerVectors(Index outerStart, Index outerSize) |
| { |
| return Block<Derived,Dynamic,Dynamic,true>(derived(), |
| IsRowMajor ? outerStart : 0, IsRowMajor ? 0 : outerStart, |
| IsRowMajor ? outerSize : rows(), IsRowMajor ? cols() : outerSize); |
| |
| } |
| |
| /** \returns the \a outer -th column (resp. row) of the matrix \c *this if \c *this |
| * is col-major (resp. row-major). Read-only. |
| */ |
| template<typename Derived> |
| const Block<const Derived,Dynamic,Dynamic,true> SparseMatrixBase<Derived>::innerVectors(Index outerStart, Index outerSize) const |
| { |
| return Block<const Derived,Dynamic,Dynamic,true>(derived(), |
| IsRowMajor ? outerStart : 0, IsRowMajor ? 0 : outerStart, |
| IsRowMajor ? outerSize : rows(), IsRowMajor ? cols() : outerSize); |
| |
| } |
| |
| namespace internal { |
| |
| template< typename XprType, int BlockRows, int BlockCols, bool InnerPanel, |
| bool OuterVector = (BlockCols==1 && XprType::IsRowMajor) |
| | // FIXME | instead of || to please GCC 4.4.0 stupid warning "suggest parentheses around &&". |
| // revert to || as soon as not needed anymore. |
| (BlockRows==1 && !XprType::IsRowMajor)> |
| class GenericSparseBlockInnerIteratorImpl; |
| |
| } |
| |
| /** Generic implementation of sparse Block expression. |
| * Real-only. |
| */ |
| template<typename XprType, int BlockRows, int BlockCols, bool InnerPanel> |
| class BlockImpl<XprType,BlockRows,BlockCols,InnerPanel,Sparse> |
| : public SparseMatrixBase<Block<XprType,BlockRows,BlockCols,InnerPanel> >, internal::no_assignment_operator |
| { |
| typedef Block<XprType, BlockRows, BlockCols, InnerPanel> BlockType; |
| public: |
| enum { IsRowMajor = internal::traits<BlockType>::IsRowMajor }; |
| EIGEN_SPARSE_PUBLIC_INTERFACE(BlockType) |
| |
| typedef typename internal::remove_all<typename XprType::Nested>::type _MatrixTypeNested; |
| |
| /** Column or Row constructor |
| */ |
| inline BlockImpl(const XprType& xpr, int i) |
| : m_matrix(xpr), |
| m_startRow( (BlockRows==1) && (BlockCols==XprType::ColsAtCompileTime) ? i : 0), |
| m_startCol( (BlockRows==XprType::RowsAtCompileTime) && (BlockCols==1) ? i : 0), |
| m_blockRows(BlockRows==1 ? 1 : xpr.rows()), |
| m_blockCols(BlockCols==1 ? 1 : xpr.cols()) |
| {} |
| |
| /** Dynamic-size constructor |
| */ |
| inline BlockImpl(const XprType& xpr, int startRow, int startCol, int blockRows, int blockCols) |
| : m_matrix(xpr), m_startRow(startRow), m_startCol(startCol), m_blockRows(blockRows), m_blockCols(blockCols) |
| {} |
| |
| inline int rows() const { return m_blockRows.value(); } |
| inline int cols() const { return m_blockCols.value(); } |
| |
| inline Scalar& coeffRef(int row, int col) |
| { |
| return m_matrix.const_cast_derived() |
| .coeffRef(row + m_startRow.value(), col + m_startCol.value()); |
| } |
| |
| inline const Scalar coeff(int row, int col) const |
| { |
| return m_matrix.coeff(row + m_startRow.value(), col + m_startCol.value()); |
| } |
| |
| inline Scalar& coeffRef(int index) |
| { |
| return m_matrix.const_cast_derived() |
| .coeffRef(m_startRow.value() + (RowsAtCompileTime == 1 ? 0 : index), |
| m_startCol.value() + (RowsAtCompileTime == 1 ? index : 0)); |
| } |
| |
| inline const Scalar coeff(int index) const |
| { |
| return m_matrix |
| .coeff(m_startRow.value() + (RowsAtCompileTime == 1 ? 0 : index), |
| m_startCol.value() + (RowsAtCompileTime == 1 ? index : 0)); |
| } |
| |
| inline const _MatrixTypeNested& nestedExpression() const { return m_matrix; } |
| |
| typedef internal::GenericSparseBlockInnerIteratorImpl<XprType,BlockRows,BlockCols,InnerPanel> InnerIterator; |
| |
| class ReverseInnerIterator : public _MatrixTypeNested::ReverseInnerIterator |
| { |
| typedef typename _MatrixTypeNested::ReverseInnerIterator Base; |
| const BlockType& m_block; |
| Index m_begin; |
| public: |
| |
| EIGEN_STRONG_INLINE ReverseInnerIterator(const BlockType& block, Index outer) |
| : Base(block.derived().nestedExpression(), outer + (IsRowMajor ? block.m_startRow.value() : block.m_startCol.value())), |
| m_block(block), |
| m_begin(IsRowMajor ? block.m_startCol.value() : block.m_startRow.value()) |
| { |
| while( (Base::operator bool()) && (Base::index() >= (IsRowMajor ? m_block.m_startCol.value()+block.m_blockCols.value() : m_block.m_startRow.value()+block.m_blockRows.value())) ) |
| Base::operator--(); |
| } |
| |
| inline Index index() const { return Base::index() - (IsRowMajor ? m_block.m_startCol.value() : m_block.m_startRow.value()); } |
| inline Index outer() const { return Base::outer() - (IsRowMajor ? m_block.m_startRow.value() : m_block.m_startCol.value()); } |
| inline Index row() const { return Base::row() - m_block.m_startRow.value(); } |
| inline Index col() const { return Base::col() - m_block.m_startCol.value(); } |
| |
| inline operator bool() const { return Base::operator bool() && Base::index() >= m_begin; } |
| }; |
| protected: |
| friend class internal::GenericSparseBlockInnerIteratorImpl<XprType,BlockRows,BlockCols,InnerPanel>; |
| friend class ReverseInnerIterator; |
| |
| EIGEN_INHERIT_ASSIGNMENT_OPERATORS(BlockImpl) |
| |
| typename XprType::Nested m_matrix; |
| const internal::variable_if_dynamic<Index, XprType::RowsAtCompileTime == 1 ? 0 : Dynamic> m_startRow; |
| const internal::variable_if_dynamic<Index, XprType::ColsAtCompileTime == 1 ? 0 : Dynamic> m_startCol; |
| const internal::variable_if_dynamic<Index, RowsAtCompileTime> m_blockRows; |
| const internal::variable_if_dynamic<Index, ColsAtCompileTime> m_blockCols; |
| |
| }; |
| |
| namespace internal { |
| template<typename XprType, int BlockRows, int BlockCols, bool InnerPanel> |
| class GenericSparseBlockInnerIteratorImpl<XprType,BlockRows,BlockCols,InnerPanel,false> : public Block<XprType, BlockRows, BlockCols, InnerPanel>::_MatrixTypeNested::InnerIterator |
| { |
| typedef Block<XprType, BlockRows, BlockCols, InnerPanel> BlockType; |
| enum { |
| IsRowMajor = BlockType::IsRowMajor |
| }; |
| typedef typename BlockType::_MatrixTypeNested _MatrixTypeNested; |
| typedef typename BlockType::Index Index; |
| typedef typename _MatrixTypeNested::InnerIterator Base; |
| const BlockType& m_block; |
| Index m_end; |
| public: |
| |
| EIGEN_STRONG_INLINE GenericSparseBlockInnerIteratorImpl(const BlockType& block, Index outer) |
| : Base(block.derived().nestedExpression(), outer + (IsRowMajor ? block.m_startRow.value() : block.m_startCol.value())), |
| m_block(block), |
| m_end(IsRowMajor ? block.m_startCol.value()+block.m_blockCols.value() : block.m_startRow.value()+block.m_blockRows.value()) |
| { |
| while( (Base::operator bool()) && (Base::index() < (IsRowMajor ? m_block.m_startCol.value() : m_block.m_startRow.value())) ) |
| Base::operator++(); |
| } |
| |
| inline Index index() const { return Base::index() - (IsRowMajor ? m_block.m_startCol.value() : m_block.m_startRow.value()); } |
| inline Index outer() const { return Base::outer() - (IsRowMajor ? m_block.m_startRow.value() : m_block.m_startCol.value()); } |
| inline Index row() const { return Base::row() - m_block.m_startRow.value(); } |
| inline Index col() const { return Base::col() - m_block.m_startCol.value(); } |
| |
| inline operator bool() const { return Base::operator bool() && Base::index() < m_end; } |
| }; |
| |
| // Row vector of a column-major sparse matrix or column of a row-major one. |
| template<typename XprType, int BlockRows, int BlockCols, bool InnerPanel> |
| class GenericSparseBlockInnerIteratorImpl<XprType,BlockRows,BlockCols,InnerPanel,true> |
| { |
| typedef Block<XprType, BlockRows, BlockCols, InnerPanel> BlockType; |
| enum { |
| IsRowMajor = BlockType::IsRowMajor |
| }; |
| typedef typename BlockType::_MatrixTypeNested _MatrixTypeNested; |
| typedef typename BlockType::Index Index; |
| typedef typename BlockType::Scalar Scalar; |
| const BlockType& m_block; |
| Index m_outerPos; |
| Index m_innerIndex; |
| Scalar m_value; |
| Index m_end; |
| public: |
| |
| EIGEN_STRONG_INLINE GenericSparseBlockInnerIteratorImpl(const BlockType& block, Index outer = 0) |
| : |
| m_block(block), |
| m_outerPos( (IsRowMajor ? block.m_startCol.value() : block.m_startRow.value()) - 1), // -1 so that operator++ finds the first non-zero entry |
| m_innerIndex(IsRowMajor ? block.m_startRow.value() : block.m_startCol.value()), |
| m_end(IsRowMajor ? block.m_startCol.value()+block.m_blockCols.value() : block.m_startRow.value()+block.m_blockRows.value()) |
| { |
| EIGEN_UNUSED_VARIABLE(outer); |
| eigen_assert(outer==0); |
| |
| ++(*this); |
| } |
| |
| inline Index index() const { return m_outerPos - (IsRowMajor ? m_block.m_startCol.value() : m_block.m_startRow.value()); } |
| inline Index outer() const { return 0; } |
| inline Index row() const { return IsRowMajor ? 0 : index(); } |
| inline Index col() const { return IsRowMajor ? index() : 0; } |
| |
| inline Scalar value() const { return m_value; } |
| |
| inline GenericSparseBlockInnerIteratorImpl& operator++() |
| { |
| // At end already? |
| if (m_outerPos >= m_end) |
| return *this; |
| |
| // search next non-zero entry. |
| while(++m_outerPos<m_end) |
| { |
| typename XprType::InnerIterator it(m_block.m_matrix, m_outerPos); |
| // search for the key m_innerIndex in the current outer-vector |
| while(it && it.index() < m_innerIndex) ++it; |
| if(it && it.index()==m_innerIndex) |
| { |
| m_value = it.value(); |
| break; |
| } |
| } |
| return *this; |
| } |
| |
| inline operator bool() const { return m_outerPos < m_end; } |
| }; |
| |
| } // end namespace internal |
| |
| |
| } // end namespace Eigen |
| |
| #endif // EIGEN_SPARSE_BLOCK_H |
