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// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2008-2010 Gael Guennebaud <gael.guennebaud@inria.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_SPARSE_CWISE_UNARY_OP_H
#define EIGEN_SPARSE_CWISE_UNARY_OP_H
// template<typename UnaryOp, typename MatrixType>
// struct ei_traits<SparseCwiseUnaryOp<UnaryOp, MatrixType> > : ei_traits<MatrixType>
// {
// typedef typename ei_result_of<
// UnaryOp(typename MatrixType::Scalar)
// >::type Scalar;
// typedef typename MatrixType::Nested MatrixTypeNested;
// typedef typename ei_unref<MatrixTypeNested>::type _MatrixTypeNested;
// enum {
// CoeffReadCost = _MatrixTypeNested::CoeffReadCost + ei_functor_traits<UnaryOp>::Cost
// };
// };
template<typename UnaryOp, typename MatrixType>
class CwiseUnaryOpImpl<UnaryOp,MatrixType,Sparse>
: public SparseMatrixBase<CwiseUnaryOp<UnaryOp, MatrixType> >
{
public:
class InnerIterator;
// typedef typename ei_unref<LhsNested>::type _LhsNested;
typedef CwiseUnaryOp<UnaryOp, MatrixType> Derived;
EIGEN_SPARSE_PUBLIC_INTERFACE(Derived)
};
template<typename UnaryOp, typename MatrixType>
class CwiseUnaryOpImpl<UnaryOp,MatrixType,Sparse>::InnerIterator
{
typedef typename CwiseUnaryOpImpl::Scalar Scalar;
typedef typename ei_traits<Derived>::_XprTypeNested _MatrixTypeNested;
typedef typename _MatrixTypeNested::InnerIterator MatrixTypeIterator;
typedef typename MatrixType::Index Index;
public:
EIGEN_STRONG_INLINE InnerIterator(const CwiseUnaryOpImpl& unaryOp, Index outer)
: m_iter(unaryOp.derived().nestedExpression(),outer), m_functor(unaryOp.derived().functor())
{}
EIGEN_STRONG_INLINE InnerIterator& operator++()
{ ++m_iter; return *this; }
EIGEN_STRONG_INLINE Scalar value() const { return m_functor(m_iter.value()); }
EIGEN_STRONG_INLINE Index index() const { return m_iter.index(); }
EIGEN_STRONG_INLINE Index row() const { return m_iter.row(); }
EIGEN_STRONG_INLINE Index col() const { return m_iter.col(); }
EIGEN_STRONG_INLINE operator bool() const { return m_iter; }
protected:
MatrixTypeIterator m_iter;
const UnaryOp m_functor;
};
template<typename ViewOp, typename MatrixType>
class CwiseUnaryViewImpl<ViewOp,MatrixType,Sparse>
: public SparseMatrixBase<CwiseUnaryView<ViewOp, MatrixType> >
{
public:
class InnerIterator;
// typedef typename ei_unref<LhsNested>::type _LhsNested;
typedef CwiseUnaryView<ViewOp, MatrixType> Derived;
EIGEN_SPARSE_PUBLIC_INTERFACE(Derived)
};
template<typename ViewOp, typename MatrixType>
class CwiseUnaryViewImpl<ViewOp,MatrixType,Sparse>::InnerIterator
{
typedef typename CwiseUnaryViewImpl::Scalar Scalar;
typedef typename ei_traits<Derived>::_MatrixTypeNested _MatrixTypeNested;
typedef typename _MatrixTypeNested::InnerIterator MatrixTypeIterator;
typedef typename MatrixType::Index Index;
public:
EIGEN_STRONG_INLINE InnerIterator(const CwiseUnaryViewImpl& unaryView, Index outer)
: m_iter(unaryView.derived().nestedExpression(),outer), m_functor(unaryView.derived().functor())
{}
EIGEN_STRONG_INLINE InnerIterator& operator++()
{ ++m_iter; return *this; }
EIGEN_STRONG_INLINE Scalar value() const { return m_functor(m_iter.value()); }
EIGEN_STRONG_INLINE Scalar& valueRef() { return m_functor(m_iter.valueRef()); }
EIGEN_STRONG_INLINE Index index() const { return m_iter.index(); }
EIGEN_STRONG_INLINE Index row() const { return m_iter.row(); }
EIGEN_STRONG_INLINE Index col() const { return m_iter.col(); }
EIGEN_STRONG_INLINE operator bool() const { return m_iter; }
protected:
MatrixTypeIterator m_iter;
const ViewOp m_functor;
};
template<typename Derived>
EIGEN_STRONG_INLINE Derived&
SparseMatrixBase<Derived>::operator*=(const Scalar& other)
{
for (Index j=0; j<outerSize(); ++j)
for (typename Derived::InnerIterator i(derived(),j); i; ++i)
i.valueRef() *= other;
return derived();
}
template<typename Derived>
EIGEN_STRONG_INLINE Derived&
SparseMatrixBase<Derived>::operator/=(const Scalar& other)
{
for (Index j=0; j<outerSize(); ++j)
for (typename Derived::InnerIterator i(derived(),j); i; ++i)
i.valueRef() /= other;
return derived();
}
#endif // EIGEN_SPARSE_CWISE_UNARY_OP_H
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