1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2008 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_HASHMATRIX_H
#define EIGEN_HASHMATRIX_H
template<typename _Scalar, int _Flags>
struct ei_traits<HashMatrix<_Scalar, _Flags> >
{
typedef _Scalar Scalar;
enum {
RowsAtCompileTime = Dynamic,
ColsAtCompileTime = Dynamic,
MaxRowsAtCompileTime = Dynamic,
MaxColsAtCompileTime = Dynamic,
Flags = SparseBit | _Flags,
CoeffReadCost = NumTraits<Scalar>::ReadCost,
SupportedAccessPatterns = RandomAccessPattern
};
};
// TODO reimplement this class using custom linked lists
template<typename _Scalar, int _Flags>
class HashMatrix
: public SparseMatrixBase<HashMatrix<_Scalar, _Flags> >
{
public:
EIGEN_GENERIC_PUBLIC_INTERFACE(HashMatrix)
class InnerIterator;
protected:
typedef typename std::map<int, Scalar>::iterator MapIterator;
typedef typename std::map<int, Scalar>::const_iterator ConstMapIterator;
public:
inline int rows() const { return m_innerSize; }
inline int cols() const { return m_data.size(); }
inline const Scalar& coeff(int row, int col) const
{
const MapIterator it = m_data[col].find(row);
if (it!=m_data[col].end())
return Scalar(0);
return it->second;
}
inline Scalar& coeffRef(int row, int col)
{
return m_data[col][row];
}
public:
inline void startFill(int /*reserveSize = 1000 --- currently unused, don't generate a warning*/) {}
inline Scalar& fill(int row, int col) { return coeffRef(row, col); }
inline void endFill() {}
~HashMatrix()
{}
inline void shallowCopy(const HashMatrix& other)
{
EIGEN_DBG_SPARSE(std::cout << "HashMatrix:: shallowCopy\n");
// FIXME implement a true shallow copy !!
resize(other.rows(), other.cols());
for (int j=0; j<this->outerSize(); ++j)
m_data[j] = other.m_data[j];
}
void resize(int _rows, int _cols)
{
if (cols() != _cols)
{
m_data.resize(_cols);
}
m_innerSize = _rows;
}
inline HashMatrix(int rows, int cols)
: m_innerSize(0)
{
resize(rows, cols);
}
template<typename OtherDerived>
inline HashMatrix(const MatrixBase<OtherDerived>& other)
: m_innerSize(0)
{
*this = other.derived();
}
inline HashMatrix& operator=(const HashMatrix& other)
{
if (other.isRValue())
{
shallowCopy(other);
}
else
{
resize(other.rows(), other.cols());
for (int col=0; col<cols(); ++col)
m_data[col] = other.m_data[col];
}
return *this;
}
template<typename OtherDerived>
inline HashMatrix& operator=(const MatrixBase<OtherDerived>& other)
{
return SparseMatrixBase<HashMatrix>::operator=(other);
}
protected:
std::vector<std::map<int, Scalar> > m_data;
int m_innerSize;
};
template<typename Scalar, int _Flags>
class HashMatrix<Scalar,_Flags>::InnerIterator
{
public:
InnerIterator(const HashMatrix& mat, int col)
: m_matrix(mat), m_it(mat.m_data[col].begin()), m_end(mat.m_data[col].end())
{}
InnerIterator& operator++() { m_it++; return *this; }
Scalar value() { return m_it->second; }
int index() const { return m_it->first; }
operator bool() const { return m_it!=m_end; }
protected:
const HashMatrix& m_matrix;
typename HashMatrix::ConstMapIterator m_it;
typename HashMatrix::ConstMapIterator m_end;
};
#endif // EIGEN_HASHMATRIX_H
|
