1c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath// This file is part of Eigen, a lightweight C++ template library 2c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath// for linear algebra. 3c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath// 4c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath// Copyright (C) 2006-2008 Benoit Jacob <jacob.benoit.1@gmail.com> 5c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath// 6c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath// This Source Code Form is subject to the terms of the Mozilla 7c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath// Public License v. 2.0. If a copy of the MPL was not distributed 8c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath// with this file, You can obtain one at http://mozilla.org/MPL/2.0/. 9c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath 10c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath#ifndef EIGEN_SWAP_H 11c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath#define EIGEN_SWAP_H 12c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath 13c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamathnamespace Eigen { 14c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath 15c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath/** \class SwapWrapper 16c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath * \ingroup Core_Module 17c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath * 18c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath * \internal 19c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath * 20c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath * \brief Internal helper class for swapping two expressions 21c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath */ 22c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamathnamespace internal { 23c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamathtemplate<typename ExpressionType> 24c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamathstruct traits<SwapWrapper<ExpressionType> > : traits<ExpressionType> {}; 25c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath} 26c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath 27c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamathtemplate<typename ExpressionType> class SwapWrapper 28c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath : public internal::dense_xpr_base<SwapWrapper<ExpressionType> >::type 29c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath{ 30c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath public: 31c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath 32c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath typedef typename internal::dense_xpr_base<SwapWrapper>::type Base; 33c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath EIGEN_DENSE_PUBLIC_INTERFACE(SwapWrapper) 34c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath typedef typename internal::packet_traits<Scalar>::type Packet; 35c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath 36c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath inline SwapWrapper(ExpressionType& xpr) : m_expression(xpr) {} 37c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath 38c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath inline Index rows() const { return m_expression.rows(); } 39c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath inline Index cols() const { return m_expression.cols(); } 40c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath inline Index outerStride() const { return m_expression.outerStride(); } 41c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath inline Index innerStride() const { return m_expression.innerStride(); } 42c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath 43c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath typedef typename internal::conditional< 44c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath internal::is_lvalue<ExpressionType>::value, 45c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath Scalar, 46c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath const Scalar 47c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath >::type ScalarWithConstIfNotLvalue; 48c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath 49c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath inline ScalarWithConstIfNotLvalue* data() { return m_expression.data(); } 50c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath inline const Scalar* data() const { return m_expression.data(); } 51c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath 527faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez inline Scalar& coeffRef(Index rowId, Index colId) 53c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath { 547faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez return m_expression.const_cast_derived().coeffRef(rowId, colId); 55c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath } 56c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath 57c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath inline Scalar& coeffRef(Index index) 58c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath { 59c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath return m_expression.const_cast_derived().coeffRef(index); 60c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath } 61c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath 627faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez inline Scalar& coeffRef(Index rowId, Index colId) const 63c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath { 647faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez return m_expression.coeffRef(rowId, colId); 65c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath } 66c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath 67c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath inline Scalar& coeffRef(Index index) const 68c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath { 69c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath return m_expression.coeffRef(index); 70c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath } 71c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath 72c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath template<typename OtherDerived> 737faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez void copyCoeff(Index rowId, Index colId, const DenseBase<OtherDerived>& other) 74c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath { 75c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath OtherDerived& _other = other.const_cast_derived(); 767faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez eigen_internal_assert(rowId >= 0 && rowId < rows() 777faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez && colId >= 0 && colId < cols()); 787faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez Scalar tmp = m_expression.coeff(rowId, colId); 797faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez m_expression.coeffRef(rowId, colId) = _other.coeff(rowId, colId); 807faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez _other.coeffRef(rowId, colId) = tmp; 81c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath } 82c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath 83c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath template<typename OtherDerived> 84c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath void copyCoeff(Index index, const DenseBase<OtherDerived>& other) 85c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath { 86c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath OtherDerived& _other = other.const_cast_derived(); 87c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath eigen_internal_assert(index >= 0 && index < m_expression.size()); 88c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath Scalar tmp = m_expression.coeff(index); 89c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath m_expression.coeffRef(index) = _other.coeff(index); 90c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath _other.coeffRef(index) = tmp; 91c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath } 92c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath 93c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath template<typename OtherDerived, int StoreMode, int LoadMode> 947faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez void copyPacket(Index rowId, Index colId, const DenseBase<OtherDerived>& other) 95c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath { 96c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath OtherDerived& _other = other.const_cast_derived(); 977faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez eigen_internal_assert(rowId >= 0 && rowId < rows() 987faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez && colId >= 0 && colId < cols()); 997faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez Packet tmp = m_expression.template packet<StoreMode>(rowId, colId); 1007faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez m_expression.template writePacket<StoreMode>(rowId, colId, 1017faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez _other.template packet<LoadMode>(rowId, colId) 102c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath ); 1037faaa9f3f0df9d23790277834d426c3d992ac3baCarlos Hernandez _other.template writePacket<LoadMode>(rowId, colId, tmp); 104c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath } 105c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath 106c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath template<typename OtherDerived, int StoreMode, int LoadMode> 107c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath void copyPacket(Index index, const DenseBase<OtherDerived>& other) 108c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath { 109c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath OtherDerived& _other = other.const_cast_derived(); 110c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath eigen_internal_assert(index >= 0 && index < m_expression.size()); 111c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath Packet tmp = m_expression.template packet<StoreMode>(index); 112c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath m_expression.template writePacket<StoreMode>(index, 113c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath _other.template packet<LoadMode>(index) 114c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath ); 115c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath _other.template writePacket<LoadMode>(index, tmp); 116c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath } 117c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath 118c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath ExpressionType& expression() const { return m_expression; } 119c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath 120c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath protected: 121c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath ExpressionType& m_expression; 122c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath}; 123c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath 124c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath} // end namespace Eigen 125c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath 126c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath#endif // EIGEN_SWAP_H 127