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// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2009 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_PRODUCTBASE_H
#define EIGEN_PRODUCTBASE_H
/** \class ProductBase
*
*/
template<typename Derived, typename _Lhs, typename _Rhs>
struct ei_traits<ProductBase<Derived,_Lhs,_Rhs> >
{
typedef typename ei_cleantype<_Lhs>::type Lhs;
typedef typename ei_cleantype<_Rhs>::type Rhs;
typedef typename ei_traits<Lhs>::Scalar Scalar;
enum {
RowsAtCompileTime = ei_traits<Lhs>::RowsAtCompileTime,
ColsAtCompileTime = ei_traits<Rhs>::ColsAtCompileTime,
MaxRowsAtCompileTime = ei_traits<Lhs>::MaxRowsAtCompileTime,
MaxColsAtCompileTime = ei_traits<Rhs>::MaxColsAtCompileTime,
Flags = EvalBeforeNestingBit,
CoeffReadCost = 0 // FIXME why is it needed ?
};
};
*
// enforce evaluation before nesting
template<typename Derived, typename Lhs, typename Rhs,int N,typename EvalType>
struct ei_nested<ProductBase<Derived,Lhs,Rhs>, N, EvalType>
{
typedef EvalType type;
};
#define EIGEN_PRODUCT_PUBLIC_INTERFACE(Derived) \
typedef ProductBase<Derived, Lhs, Rhs > ProductBaseType; \
_EIGEN_GENERIC_PUBLIC_INTERFACE(Derived, ProductBaseType) \
typedef typename Base::LhsNested LhsNested; \
typedef typename Base::_LhsNested _LhsNested; \
typedef typename Base::LhsBlasTraits LhsBlasTraits; \
typedef typename Base::ActualLhsType ActualLhsType; \
typedef typename Base::_ActualLhsType _ActualLhsType; \
typedef typename Base::RhsNested RhsNested; \
typedef typename Base::_RhsNested _RhsNested; \
typedef typename Base::RhsBlasTraits RhsBlasTraits; \
typedef typename Base::ActualRhsType ActualRhsType; \
typedef typename Base::_ActualRhsType _ActualRhsType; \
using Base::m_lhs; \
using Base::m_rhs;
template<typename Derived, typename Lhs, typename Rhs>
class ProductBase : public MatrixBase<Derived>
{
public:
_EIGEN_GENERIC_PUBLIC_INTERFACE(ProductBase,MatrixBase<Derived>)
typedef typename Lhs::Nested LhsNested;
typedef typename ei_cleantype<LhsNested>::type _LhsNested;
typedef ei_blas_traits<_LhsNested> LhsBlasTraits;
typedef typename LhsBlasTraits::DirectLinearAccessType ActualLhsType;
typedef typename ei_cleantype<ActualLhsType>::type _ActualLhsType;
typedef typename Rhs::Nested RhsNested;
typedef typename ei_cleantype<RhsNested>::type _RhsNested;
typedef ei_blas_traits<_RhsNested> RhsBlasTraits;
typedef typename RhsBlasTraits::DirectLinearAccessType ActualRhsType;
typedef typename ei_cleantype<ActualRhsType>::type _ActualRhsType;
using Base::derived;
typedef typename Base::PlainMatrixType PlainMatrixType;
ProductBase(const Lhs& lhs, const Rhs& rhs)
: m_lhs(lhs), m_rhs(rhs)
{}
inline int rows() const { return m_lhs.rows(); }
inline int cols() const { return m_rhs.cols(); }
template<typename Dest>
inline void evalTo(Dest& dst) const { dst.setZero(); addTo(dst,1); }
template<typename Dest>
inline void addTo(Dest& dst) const { addTo(dst,1); }
template<typename Dest>
inline void subTo(Dest& dst) const { addTo(dst,-1); }
template<typename Dest>
inline void addTo(Dest& dst,Scalar alpha) const { derived().addTo(dst,alpha); }
PlainMatrixType eval() const
{
PlainMatrixType res(rows(), cols());
res.setZero();
evalTo(res);
return res;
}
protected:
const LhsNested m_lhs;
const RhsNested m_rhs;
private:
// discard coeff methods
void coeff(int,int) const;
void coeffRef(int,int);
void coeff(int) const;
void coeffRef(int);
};
template<typename Derived>
template<typename ProductDerived, typename Lhs, typename Rhs>
Derived& MatrixBase<Derived>::operator=(const ProductBase<ProductDerived,Lhs,Rhs>& other)
{
other.evalTo(derived()); return derived();
}
template<typename Derived>
template<typename ProductDerived, typename Lhs, typename Rhs>
Derived& MatrixBase<Derived>::operator+=(const ProductBase<ProductDerived,Lhs,Rhs>& other)
{
other.addTo(derived()); return derived();
}
template<typename Derived>
template<typename ProductDerived, typename Lhs, typename Rhs>
Derived& MatrixBase<Derived>::operator-=(const ProductBase<ProductDerived,Lhs,Rhs>& other)
{
other.subTo(derived()); return derived();
}
#endif // EIGEN_PRODUCTBASE_H
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