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 // This Source Code Form is subject to the terms of the Mozilla 00007 // Public License v. 2.0. If a copy of the MPL was not distributed 00008 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/. 00009 00010 #ifndef EIGEN_COREITERATORS_H 00011 #define EIGEN_COREITERATORS_H 00012 00013 namespace Eigen { 00014 00015 /* This file contains the respective InnerIterator definition of the expressions defined in Eigen/Core 00016 */ 00017 00025 // generic version for dense matrix and expressions 00026 template<typename Derived> class DenseBase<Derived>::InnerIterator 00027 { 00028 protected: 00029 typedef typename Derived::Scalar Scalar; 00030 typedef typename Derived::Index Index; 00031 00032 enum { IsRowMajor = (Derived::Flags&RowMajorBit)==RowMajorBit }; 00033 public: 00034 EIGEN_STRONG_INLINE InnerIterator(const Derived& expr, Index outer) 00035 : m_expression(expr), m_inner(0), m_outer(outer), m_end(expr.innerSize()) 00036 {} 00037 00038 EIGEN_STRONG_INLINE Scalar value() const 00039 { 00040 return (IsRowMajor) ? m_expression.coeff(m_outer, m_inner) 00041 : m_expression.coeff(m_inner, m_outer); 00042 } 00043 00044 EIGEN_STRONG_INLINE InnerIterator& operator++() { m_inner++; return *this; } 00045 00046 EIGEN_STRONG_INLINE Index index() const { return m_inner; } 00047 inline Index row() const { return IsRowMajor ? m_outer : index(); } 00048 inline Index col() const { return IsRowMajor ? index() : m_outer; } 00049 00050 EIGEN_STRONG_INLINE operator bool() const { return m_inner < m_end && m_inner>=0; } 00051 00052 protected: 00053 const Derived& m_expression; 00054 Index m_inner; 00055 const Index m_outer; 00056 const Index m_end; 00057 }; 00058 00059 } // end namespace Eigen 00060 00061 #endif // EIGEN_COREITERATORS_H