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Diffstat (limited to 'extern/Eigen3/Eigen/src/Core/Swap.h')
| -rw-r--r-- | extern/Eigen3/Eigen/src/Core/Swap.h | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/extern/Eigen3/Eigen/src/Core/Swap.h b/extern/Eigen3/Eigen/src/Core/Swap.h new file mode 100644 index 00000000000..5fb03286675 --- /dev/null +++ b/extern/Eigen3/Eigen/src/Core/Swap.h @@ -0,0 +1,126 @@ +// This file is part of Eigen, a lightweight C++ template library +// for linear algebra. +// +// Copyright (C) 2006-2008 Benoit Jacob <jacob.benoit.1@gmail.com> +// +// 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_SWAP_H +#define EIGEN_SWAP_H + +/** \class SwapWrapper + * \ingroup Core_Module + * + * \internal + * + * \brief Internal helper class for swapping two expressions + */ +namespace internal { +template<typename ExpressionType> +struct traits<SwapWrapper<ExpressionType> > : traits<ExpressionType> {}; +} + +template<typename ExpressionType> class SwapWrapper + : public internal::dense_xpr_base<SwapWrapper<ExpressionType> >::type +{ + public: + + typedef typename internal::dense_xpr_base<SwapWrapper>::type Base; + EIGEN_DENSE_PUBLIC_INTERFACE(SwapWrapper) + typedef typename internal::packet_traits<Scalar>::type Packet; + + inline SwapWrapper(ExpressionType& xpr) : m_expression(xpr) {} + + inline Index rows() const { return m_expression.rows(); } + inline Index cols() const { return m_expression.cols(); } + inline Index outerStride() const { return m_expression.outerStride(); } + inline Index innerStride() const { return m_expression.innerStride(); } + + inline Scalar& coeffRef(Index row, Index col) + { + return m_expression.const_cast_derived().coeffRef(row, col); + } + + inline Scalar& coeffRef(Index index) + { + return m_expression.const_cast_derived().coeffRef(index); + } + + inline Scalar& coeffRef(Index row, Index col) const + { + return m_expression.coeffRef(row, col); + } + + inline Scalar& coeffRef(Index index) const + { + return m_expression.coeffRef(index); + } + + template<typename OtherDerived> + void copyCoeff(Index row, Index col, const DenseBase<OtherDerived>& other) + { + OtherDerived& _other = other.const_cast_derived(); + eigen_internal_assert(row >= 0 && row < rows() + && col >= 0 && col < cols()); + Scalar tmp = m_expression.coeff(row, col); + m_expression.coeffRef(row, col) = _other.coeff(row, col); + _other.coeffRef(row, col) = tmp; + } + + template<typename OtherDerived> + void copyCoeff(Index index, const DenseBase<OtherDerived>& other) + { + OtherDerived& _other = other.const_cast_derived(); + eigen_internal_assert(index >= 0 && index < m_expression.size()); + Scalar tmp = m_expression.coeff(index); + m_expression.coeffRef(index) = _other.coeff(index); + _other.coeffRef(index) = tmp; + } + + template<typename OtherDerived, int StoreMode, int LoadMode> + void copyPacket(Index row, Index col, const DenseBase<OtherDerived>& other) + { + OtherDerived& _other = other.const_cast_derived(); + eigen_internal_assert(row >= 0 && row < rows() + && col >= 0 && col < cols()); + Packet tmp = m_expression.template packet<StoreMode>(row, col); + m_expression.template writePacket<StoreMode>(row, col, + _other.template packet<LoadMode>(row, col) + ); + _other.template writePacket<LoadMode>(row, col, tmp); + } + + template<typename OtherDerived, int StoreMode, int LoadMode> + void copyPacket(Index index, const DenseBase<OtherDerived>& other) + { + OtherDerived& _other = other.const_cast_derived(); + eigen_internal_assert(index >= 0 && index < m_expression.size()); + Packet tmp = m_expression.template packet<StoreMode>(index); + m_expression.template writePacket<StoreMode>(index, + _other.template packet<LoadMode>(index) + ); + _other.template writePacket<LoadMode>(index, tmp); + } + + protected: + ExpressionType& m_expression; +}; + +#endif // EIGEN_SWAP_H |