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Diffstat (limited to 'extern/Eigen3/Eigen/src/Core/CoreIterators.h')
-rw-r--r-- | extern/Eigen3/Eigen/src/Core/CoreIterators.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/extern/Eigen3/Eigen/src/Core/CoreIterators.h b/extern/Eigen3/Eigen/src/Core/CoreIterators.h new file mode 100644 index 00000000000..6da4683d2c2 --- /dev/null +++ b/extern/Eigen3/Eigen/src/Core/CoreIterators.h @@ -0,0 +1,61 @@ +// This file is part of Eigen, a lightweight C++ template library +// for linear algebra. +// +// Copyright (C) 2008-2010 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_COREITERATORS_H +#define EIGEN_COREITERATORS_H + +namespace Eigen { + +/* This file contains the respective InnerIterator definition of the expressions defined in Eigen/Core + */ + +/** \ingroup SparseCore_Module + * \class InnerIterator + * \brief An InnerIterator allows to loop over the element of a sparse (or dense) matrix or expression + * + * todo + */ + +// generic version for dense matrix and expressions +template<typename Derived> class DenseBase<Derived>::InnerIterator +{ + protected: + typedef typename Derived::Scalar Scalar; + typedef typename Derived::Index Index; + + enum { IsRowMajor = (Derived::Flags&RowMajorBit)==RowMajorBit }; + public: + EIGEN_STRONG_INLINE InnerIterator(const Derived& expr, Index outer) + : m_expression(expr), m_inner(0), m_outer(outer), m_end(expr.innerSize()) + {} + + EIGEN_STRONG_INLINE Scalar value() const + { + return (IsRowMajor) ? m_expression.coeff(m_outer, m_inner) + : m_expression.coeff(m_inner, m_outer); + } + + EIGEN_STRONG_INLINE InnerIterator& operator++() { m_inner++; return *this; } + + EIGEN_STRONG_INLINE Index 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 Derived& m_expression; + Index m_inner; + const Index m_outer; + const Index m_end; +}; + +} // end namespace Eigen + +#endif // EIGEN_COREITERATORS_H |