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Diffstat (limited to 'extern/Eigen2/Eigen/src/Sparse/CoreIterators.h')
-rw-r--r-- | extern/Eigen2/Eigen/src/Sparse/CoreIterators.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/extern/Eigen2/Eigen/src/Sparse/CoreIterators.h b/extern/Eigen2/Eigen/src/Sparse/CoreIterators.h new file mode 100644 index 00000000000..f1520a585ca --- /dev/null +++ b/extern/Eigen2/Eigen/src/Sparse/CoreIterators.h @@ -0,0 +1,68 @@ +// This file is part of Eigen, a lightweight C++ template library +// for linear algebra. Eigen itself is part of the KDE project. +// +// Copyright (C) 2008 Gael Guennebaud <g.gael@free.fr> +// +// Eigen is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 3 of the License, or (at your option) any later version. +// +// Alternatively, you can redistribute it and/or +// modify it under the terms of the GNU General Public License as +// published by the Free Software Foundation; either version 2 of +// the License, or (at your option) any later version. +// +// Eigen is distributed in the hope that it will be useful, but WITHOUT ANY +// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License or the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License and a copy of the GNU General Public License along with +// Eigen. If not, see <http://www.gnu.org/licenses/>. + +#ifndef EIGEN_COREITERATORS_H +#define EIGEN_COREITERATORS_H + +/* This file contains the respective InnerIterator definition of the expressions defined in Eigen/Core + */ + +/** \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 MatrixBase<Derived>::InnerIterator +{ + typedef typename Derived::Scalar Scalar; + enum { IsRowMajor = (Derived::Flags&RowMajorBit)==RowMajorBit }; + public: + EIGEN_STRONG_INLINE InnerIterator(const Derived& expr, int outer) + : m_expression(expr), m_inner(0), m_outer(outer), m_end(expr.rows()) + {} + + 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 int index() const { return m_inner; } + inline int row() const { return IsRowMajor ? m_outer : index(); } + inline int 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; + int m_inner; + const int m_outer; + const int m_end; +}; + +#endif // EIGEN_COREITERATORS_H |