mirror of
https://gitlab.com/libeigen/eigen.git
synced 2026-04-10 11:34:33 +08:00
Add a Ref<SparseMatrix> specialization.
This commit is contained in:
Gael Guennebaud
200
Eigen/src/SparseCore/SparseRef.h
Normal file
200
Eigen/src/SparseCore/SparseRef.h
Normal file
@@ -0,0 +1,200 @@
|
||||
// This file is part of Eigen, a lightweight C++ template library
|
||||
// for linear algebra.
|
||||
//
|
||||
// Copyright (C) 2015 Gael Guennebaud <gael.guennebaud@inria.fr>
|
||||
//
|
||||
// This Source Code Form is subject to the terms of the Mozilla
|
||||
// Public License v. 2.0. If a copy of the MPL was not distributed
|
||||
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
||||
|
||||
#ifndef EIGEN_SPARSE_REF_H
|
||||
#define EIGEN_SPARSE_REF_H
|
||||
|
||||
namespace Eigen {
|
||||
|
||||
namespace internal {
|
||||
|
||||
template<typename Derived> class SparseRefBase;
|
||||
|
||||
template<typename MatScalar, int MatOptions, typename MatIndex, int _Options, typename _StrideType>
|
||||
struct traits<Ref<SparseMatrix<MatScalar,MatOptions,MatIndex>, _Options, _StrideType> >
|
||||
: public traits<SparseMatrix<MatScalar,MatOptions,MatIndex> >
|
||||
{
|
||||
typedef SparseMatrix<MatScalar,MatOptions,MatIndex> PlainObjectType;
|
||||
enum {
|
||||
Options = _Options,
|
||||
Flags = traits<MappedSparseMatrix<MatScalar,MatOptions,MatIndex> >::Flags | CompressedAccessBit | NestByRefBit
|
||||
};
|
||||
|
||||
template<typename Derived> struct match {
|
||||
enum {
|
||||
StorageOrderMatch = PlainObjectType::IsVectorAtCompileTime || Derived::IsVectorAtCompileTime || ((PlainObjectType::Flags&RowMajorBit)==(Derived::Flags&RowMajorBit)),
|
||||
MatchAtCompileTime = (Derived::Flags&CompressedAccessBit) && StorageOrderMatch
|
||||
};
|
||||
typedef typename internal::conditional<MatchAtCompileTime,internal::true_type,internal::false_type>::type type;
|
||||
};
|
||||
|
||||
};
|
||||
|
||||
template<typename MatScalar, int MatOptions, typename MatIndex, int _Options, typename _StrideType>
|
||||
struct traits<Ref<const SparseMatrix<MatScalar,MatOptions,MatIndex>, _Options, _StrideType> >
|
||||
: public traits<Ref<SparseMatrix<MatScalar,MatOptions,MatIndex>, _Options, _StrideType> >
|
||||
{
|
||||
enum {
|
||||
Flags = (traits<MappedSparseMatrix<MatScalar,MatOptions,MatIndex> >::Flags | CompressedAccessBit | NestByRefBit) & ~LvalueBit
|
||||
};
|
||||
};
|
||||
|
||||
template<typename Derived>
|
||||
struct traits<SparseRefBase<Derived> > : public traits<Derived> {};
|
||||
|
||||
template<typename Derived> class SparseRefBase
|
||||
// : public MappedSparseMatrix<MatScalar,MatOptions,MatIndex>
|
||||
: public SparseMapBase<Derived>
|
||||
{
|
||||
// typedef typename internal::traits<Derived>::PlainObjectType PlainObjectType;
|
||||
|
||||
public:
|
||||
|
||||
typedef SparseMapBase<Derived> Base;
|
||||
_EIGEN_SPARSE_PUBLIC_INTERFACE(SparseRefBase)
|
||||
|
||||
SparseRefBase()
|
||||
: Base(RowsAtCompileTime==Dynamic?0:RowsAtCompileTime,ColsAtCompileTime==Dynamic?0:ColsAtCompileTime, 0, 0, 0, 0, 0)
|
||||
{}
|
||||
|
||||
EIGEN_INHERIT_ASSIGNMENT_OPERATORS(SparseRefBase)
|
||||
|
||||
protected:
|
||||
|
||||
|
||||
template<typename Expression>
|
||||
void construct(Expression& expr)
|
||||
{
|
||||
::new (static_cast<Base*>(this)) Base(expr.rows(), expr.cols(), expr.nonZeros(), expr.outerIndexPtr(), expr.innerIndexPtr(), expr.valuePtr(), expr.innerNonZeroPtr());
|
||||
}
|
||||
};
|
||||
|
||||
} // namespace internal
|
||||
|
||||
template<typename MatScalar, int MatOptions, typename MatIndex, int Options, typename StrideType>
|
||||
class Ref<SparseMatrix<MatScalar,MatOptions,MatIndex>, Options, StrideType >
|
||||
: public internal::SparseRefBase<Ref<SparseMatrix<MatScalar,MatOptions,MatIndex>, Options, StrideType > >
|
||||
{
|
||||
typedef SparseMatrix<MatScalar,MatOptions,MatIndex> PlainObjectType;
|
||||
typedef internal::traits<Ref> Traits;
|
||||
template<int OtherOptions>
|
||||
inline Ref(const SparseMatrix<MatScalar,OtherOptions,MatIndex>& expr);
|
||||
template<int OtherOptions>
|
||||
inline Ref(const MappedSparseMatrix<MatScalar,OtherOptions,MatIndex>& expr);
|
||||
public:
|
||||
|
||||
typedef internal::SparseRefBase<Ref> Base;
|
||||
_EIGEN_SPARSE_PUBLIC_INTERFACE(Ref)
|
||||
|
||||
|
||||
#ifndef EIGEN_PARSED_BY_DOXYGEN
|
||||
template<int OtherOptions>
|
||||
inline Ref(SparseMatrix<MatScalar,OtherOptions,MatIndex>& expr)
|
||||
{
|
||||
EIGEN_STATIC_ASSERT(bool(Traits::template match<SparseMatrix<MatScalar,OtherOptions,MatIndex> >::MatchAtCompileTime), STORAGE_LAYOUT_DOES_NOT_MATCH);
|
||||
Base::construct(expr.derived());
|
||||
}
|
||||
|
||||
template<int OtherOptions>
|
||||
inline Ref(MappedSparseMatrix<MatScalar,OtherOptions,MatIndex>& expr)
|
||||
{
|
||||
EIGEN_STATIC_ASSERT(bool(Traits::template match<SparseMatrix<MatScalar,OtherOptions,MatIndex> >::MatchAtCompileTime), STORAGE_LAYOUT_DOES_NOT_MATCH);
|
||||
Base::construct(expr.derived());
|
||||
}
|
||||
|
||||
template<typename Derived>
|
||||
inline Ref(const SparseCompressedBase<Derived>& expr)
|
||||
#else
|
||||
template<typename Derived>
|
||||
inline Ref(SparseCompressedBase<Derived>& expr)
|
||||
#endif
|
||||
{
|
||||
EIGEN_STATIC_ASSERT(bool(internal::is_lvalue<Derived>::value), THIS_EXPRESSION_IS_NOT_A_LVALUE__IT_IS_READ_ONLY);
|
||||
EIGEN_STATIC_ASSERT(bool(Traits::template match<Derived>::MatchAtCompileTime), STORAGE_LAYOUT_DOES_NOT_MATCH);
|
||||
Base::construct(expr.const_cast_derived());
|
||||
}
|
||||
|
||||
EIGEN_INHERIT_ASSIGNMENT_OPERATORS(Ref)
|
||||
|
||||
};
|
||||
|
||||
// this is the const ref version
|
||||
template<typename MatScalar, int MatOptions, typename MatIndex, int Options, typename StrideType>
|
||||
class Ref<const SparseMatrix<MatScalar,MatOptions,MatIndex>, Options, StrideType>
|
||||
: public internal::SparseRefBase<Ref<const SparseMatrix<MatScalar,MatOptions,MatIndex>, Options, StrideType> >
|
||||
{
|
||||
typedef SparseMatrix<MatScalar,MatOptions,MatIndex> TPlainObjectType;
|
||||
typedef internal::traits<Ref> Traits;
|
||||
public:
|
||||
|
||||
typedef internal::SparseRefBase<Ref> Base;
|
||||
_EIGEN_SPARSE_PUBLIC_INTERFACE(Ref)
|
||||
|
||||
template<typename Derived>
|
||||
inline Ref(const SparseMatrixBase<Derived>& expr)
|
||||
{
|
||||
construct(expr.derived(), typename Traits::template match<Derived>::type());
|
||||
}
|
||||
|
||||
inline Ref(const Ref& other) : Base(other) {
|
||||
// copy constructor shall not copy the m_object, to avoid unnecessary malloc and copy
|
||||
}
|
||||
|
||||
template<typename OtherRef>
|
||||
inline Ref(const RefBase<OtherRef>& other) {
|
||||
construct(other.derived(), typename Traits::template match<OtherRef>::type());
|
||||
}
|
||||
|
||||
protected:
|
||||
|
||||
template<typename Expression>
|
||||
void construct(const Expression& expr,internal::true_type)
|
||||
{
|
||||
Base::construct(expr);
|
||||
}
|
||||
|
||||
template<typename Expression>
|
||||
void construct(const Expression& expr, internal::false_type)
|
||||
{
|
||||
m_object = expr;
|
||||
Base::construct(m_object);
|
||||
}
|
||||
|
||||
protected:
|
||||
TPlainObjectType m_object;
|
||||
};
|
||||
|
||||
|
||||
namespace internal {
|
||||
|
||||
template<typename MatScalar, int MatOptions, typename MatIndex, int Options, typename StrideType>
|
||||
struct evaluator<Ref<SparseMatrix<MatScalar,MatOptions,MatIndex>, Options, StrideType> >
|
||||
: evaluator<SparseCompressedBase<Ref<SparseMatrix<MatScalar,MatOptions,MatIndex>, Options, StrideType> > >
|
||||
{
|
||||
typedef evaluator<SparseCompressedBase<Ref<SparseMatrix<MatScalar,MatOptions,MatIndex>, Options, StrideType> > > Base;
|
||||
typedef Ref<SparseMatrix<MatScalar,MatOptions,MatIndex>, Options, StrideType> XprType;
|
||||
evaluator() : Base() {}
|
||||
explicit evaluator(const XprType &mat) : Base(mat) {}
|
||||
};
|
||||
|
||||
template<typename MatScalar, int MatOptions, typename MatIndex, int Options, typename StrideType>
|
||||
struct evaluator<Ref<const SparseMatrix<MatScalar,MatOptions,MatIndex>, Options, StrideType> >
|
||||
: evaluator<SparseCompressedBase<Ref<const SparseMatrix<MatScalar,MatOptions,MatIndex>, Options, StrideType> > >
|
||||
{
|
||||
typedef evaluator<SparseCompressedBase<Ref<const SparseMatrix<MatScalar,MatOptions,MatIndex>, Options, StrideType> > > Base;
|
||||
typedef Ref<const SparseMatrix<MatScalar,MatOptions,MatIndex>, Options, StrideType> XprType;
|
||||
evaluator() : Base() {}
|
||||
explicit evaluator(const XprType &mat) : Base(mat) {}
|
||||
};
|
||||
|
||||
}
|
||||
|
||||
} // end namespace Eigen
|
||||
|
||||
#endif // EIGEN_SPARSE_REF_H
|
||||
Reference in New Issue
Block a user