Eigen  3.4.90 (git rev a4098ac676528a83cfb73d4d26ce1b42ec05f47c)
SparseCwiseUnaryOp.h
1// This file is part of Eigen, a lightweight C++ template library
2// for linear algebra.
3//
4// Copyright (C) 2008-2015 Gael Guennebaud <gael.guennebaud@inria.fr>
5//
6// This Source Code Form is subject to the terms of the Mozilla
7// Public License v. 2.0. If a copy of the MPL was not distributed
8// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
9
10#ifndef EIGEN_SPARSE_CWISE_UNARY_OP_H
11#define EIGEN_SPARSE_CWISE_UNARY_OP_H
12
13#include "./InternalHeaderCheck.h"
14
15namespace Eigen {
16
17namespace internal {
18
19template<typename UnaryOp, typename ArgType>
20struct unary_evaluator<CwiseUnaryOp<UnaryOp,ArgType>, IteratorBased>
21 : public evaluator_base<CwiseUnaryOp<UnaryOp,ArgType> >
22{
23 public:
24 typedef CwiseUnaryOp<UnaryOp, ArgType> XprType;
25
26 class InnerIterator;
27
28 enum {
29 CoeffReadCost = int(evaluator<ArgType>::CoeffReadCost) + int(functor_traits<UnaryOp>::Cost),
30 Flags = XprType::Flags
31 };
32
33 explicit unary_evaluator(const XprType& op) : m_functor(op.functor()), m_argImpl(op.nestedExpression())
34 {
35 EIGEN_INTERNAL_CHECK_COST_VALUE(functor_traits<UnaryOp>::Cost);
36 EIGEN_INTERNAL_CHECK_COST_VALUE(CoeffReadCost);
37 }
38
39 inline Index nonZerosEstimate() const {
40 return m_argImpl.nonZerosEstimate();
41 }
42
43 protected:
44 typedef typename evaluator<ArgType>::InnerIterator EvalIterator;
45
46 const UnaryOp m_functor;
47 evaluator<ArgType> m_argImpl;
48};
49
50template<typename UnaryOp, typename ArgType>
51class unary_evaluator<CwiseUnaryOp<UnaryOp,ArgType>, IteratorBased>::InnerIterator
52 : public unary_evaluator<CwiseUnaryOp<UnaryOp,ArgType>, IteratorBased>::EvalIterator
53{
54 protected:
55 typedef typename XprType::Scalar Scalar;
56 typedef typename unary_evaluator<CwiseUnaryOp<UnaryOp,ArgType>, IteratorBased>::EvalIterator Base;
57 public:
58
59 EIGEN_STRONG_INLINE InnerIterator(const unary_evaluator& unaryOp, Index outer)
60 : Base(unaryOp.m_argImpl,outer), m_functor(unaryOp.m_functor)
61 {}
62
63 EIGEN_STRONG_INLINE InnerIterator& operator++()
64 { Base::operator++(); return *this; }
65
66 EIGEN_STRONG_INLINE Scalar value() const { return m_functor(Base::value()); }
67
68 protected:
69 const UnaryOp m_functor;
70 private:
71 Scalar& valueRef();
72};
73
74template<typename ViewOp, typename ArgType>
75struct unary_evaluator<CwiseUnaryView<ViewOp,ArgType>, IteratorBased>
76 : public evaluator_base<CwiseUnaryView<ViewOp,ArgType> >
77{
78 public:
79 typedef CwiseUnaryView<ViewOp, ArgType> XprType;
80
81 class InnerIterator;
82
83 enum {
84 CoeffReadCost = int(evaluator<ArgType>::CoeffReadCost) + int(functor_traits<ViewOp>::Cost),
85 Flags = XprType::Flags
86 };
87
88 explicit unary_evaluator(const XprType& op) : m_functor(op.functor()), m_argImpl(op.nestedExpression())
89 {
90 EIGEN_INTERNAL_CHECK_COST_VALUE(functor_traits<ViewOp>::Cost);
91 EIGEN_INTERNAL_CHECK_COST_VALUE(CoeffReadCost);
92 }
93
94 protected:
95 typedef typename evaluator<ArgType>::InnerIterator EvalIterator;
96
97 const ViewOp m_functor;
98 evaluator<ArgType> m_argImpl;
99};
100
101template<typename ViewOp, typename ArgType>
102class unary_evaluator<CwiseUnaryView<ViewOp,ArgType>, IteratorBased>::InnerIterator
103 : public unary_evaluator<CwiseUnaryView<ViewOp,ArgType>, IteratorBased>::EvalIterator
104{
105 protected:
106 typedef typename XprType::Scalar Scalar;
107 typedef typename unary_evaluator<CwiseUnaryView<ViewOp,ArgType>, IteratorBased>::EvalIterator Base;
108 public:
109
110 EIGEN_STRONG_INLINE InnerIterator(const unary_evaluator& unaryOp, Index outer)
111 : Base(unaryOp.m_argImpl,outer), m_functor(unaryOp.m_functor)
112 {}
113
114 EIGEN_STRONG_INLINE InnerIterator& operator++()
115 { Base::operator++(); return *this; }
116
117 EIGEN_STRONG_INLINE Scalar value() const { return m_functor(Base::value()); }
118 EIGEN_STRONG_INLINE Scalar& valueRef() { return m_functor(Base::valueRef()); }
119
120 protected:
121 const ViewOp m_functor;
122};
123
124} // end namespace internal
125
126template<typename Derived>
127EIGEN_STRONG_INLINE Derived&
128SparseMatrixBase<Derived>::operator*=(const Scalar& other)
129{
130 typedef typename internal::evaluator<Derived>::InnerIterator EvalIterator;
131 internal::evaluator<Derived> thisEval(derived());
132 for (Index j=0; j<outerSize(); ++j)
133 for (EvalIterator i(thisEval,j); i; ++i)
134 i.valueRef() *= other;
135 return derived();
136}
137
138template<typename Derived>
139EIGEN_STRONG_INLINE Derived&
140SparseMatrixBase<Derived>::operator/=(const Scalar& other)
141{
142 typedef typename internal::evaluator<Derived>::InnerIterator EvalIterator;
143 internal::evaluator<Derived> thisEval(derived());
144 for (Index j=0; j<outerSize(); ++j)
145 for (EvalIterator i(thisEval,j); i; ++i)
146 i.valueRef() /= other;
147 return derived();
148}
149
150} // end namespace Eigen
151
152#endif // EIGEN_SPARSE_CWISE_UNARY_OP_H
Namespace containing all symbols from the Eigen library.
Definition: B01_Experimental.dox:1
EIGEN_DEFAULT_DENSE_INDEX_TYPE Index
The Index type as used for the API.
Definition: Meta.h:59