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ReverseInnerIterator for SparseBlock

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Desire NUENTSA 2012-11-16 20:00:34 +01:00
parent 4acc18f100
commit 9162a8492e
1 changed files with 23 additions and 0 deletions
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23
Eigen/src/SparseCore/SparseBlock.h
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@ -366,9 +366,32 @@ public:
inline operator bool() const { return Base::operator bool() && Base::index() < m_end; } inline operator bool() const { return Base::operator bool() && Base::index() < m_end; }
}; };
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::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: protected:
friend class InnerIterator; friend class InnerIterator;
friend class ReverseInnerIterator;
const typename XprType::Nested m_matrix; const 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::RowsAtCompileTime == 1 ? 0 : Dynamic> m_startRow;