00001 // This file is part of Eigen, a lightweight C++ template library 00002 // for linear algebra. 00003 // 00004 // Copyright (C) 2008-2010 Gael Guennebaud <gael.guennebaud@inria.fr> 00005 // 00006 // Eigen is free software; you can redistribute it and/or 00007 // modify it under the terms of the GNU Lesser General Public 00008 // License as published by the Free Software Foundation; either 00009 // version 3 of the License, or (at your option) any later version. 00010 // 00011 // Alternatively, you can redistribute it and/or 00012 // modify it under the terms of the GNU General Public License as 00013 // published by the Free Software Foundation; either version 2 of 00014 // the License, or (at your option) any later version. 00015 // 00016 // Eigen is distributed in the hope that it will be useful, but WITHOUT ANY 00017 // WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 00018 // FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License or the 00019 // GNU General Public License for more details. 00020 // 00021 // You should have received a copy of the GNU Lesser General Public 00022 // License and a copy of the GNU General Public License along with 00023 // Eigen. If not, see <http://www.gnu.org/licenses/>. 00024 00025 #ifndef EIGEN_COREITERATORS_H 00026 #define EIGEN_COREITERATORS_H 00027 00028 /* This file contains the respective InnerIterator definition of the expressions defined in Eigen/Core 00029 */ 00030 00037 // generic version for dense matrix and expressions 00038 template<typename Derived> class DenseBase<Derived>::InnerIterator 00039 { 00040 protected: 00041 typedef typename Derived::Scalar Scalar; 00042 typedef typename Derived::Index Index; 00043 00044 enum { IsRowMajor = (Derived::Flags&RowMajorBit)==RowMajorBit }; 00045 public: 00046 EIGEN_STRONG_INLINE InnerIterator(const Derived& expr, Index outer) 00047 : m_expression(expr), m_inner(0), m_outer(outer), m_end(expr.innerSize()) 00048 {} 00049 00050 EIGEN_STRONG_INLINE Scalar value() const 00051 { 00052 return (IsRowMajor) ? m_expression.coeff(m_outer, m_inner) 00053 : m_expression.coeff(m_inner, m_outer); 00054 } 00055 00056 EIGEN_STRONG_INLINE InnerIterator& operator++() { m_inner++; return *this; } 00057 00058 EIGEN_STRONG_INLINE Index index() const { return m_inner; } 00059 inline Index row() const { return IsRowMajor ? m_outer : index(); } 00060 inline Index col() const { return IsRowMajor ? index() : m_outer; } 00061 00062 EIGEN_STRONG_INLINE operator bool() const { return m_inner < m_end && m_inner>=0; } 00063 00064 protected: 00065 const Derived& m_expression; 00066 Index m_inner; 00067 const Index m_outer; 00068 const Index m_end; 00069 }; 00070 00071 #endif // EIGEN_COREITERATORS_H
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