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
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
// -*- C++ -*-
/***************************************************************************
* blitz/veciter.h Iterator classes for Vector<P_numtype>
*
* $Id: veciter.h 1414 2005-11-01 22:04:59Z cookedm $
*
* Copyright (C) 1997-2001 Todd Veldhuizen <tveldhui@oonumerics.org>
*
* This code was relicensed under the modified BSD license for use in SciPy
* by Todd Veldhuizen (see LICENSE.txt in the weave directory).
*
*
* Suggestions: blitz-dev@oonumerics.org
* Bugs: blitz-bugs@oonumerics.org
*
* For more information, please see the Blitz++ Home Page:
* http://oonumerics.org/blitz/
*
***************************************************************************/
#ifndef BZ_VECITER_H
#define BZ_VECITER_H
#ifndef BZ_VECTOR_H
#error <blitz/veciter.h> should be included via <blitz/vector.h>
#endif
BZ_NAMESPACE(blitz)
// Declaration of class VectorIter
template<typename P_numtype>
class VectorIter {
public:
typedef P_numtype T_numtype;
explicit VectorIter(Vector<P_numtype>& x)
: data_(x.data())
{
stride_ = x.stride();
length_ = x.length();
}
VectorIter(P_numtype* restrict data, int stride, int length)
: data_(data), stride_(stride), length_(length)
{ }
#ifdef BZ_MANUAL_VECEXPR_COPY_CONSTRUCTOR
VectorIter(const VectorIter<P_numtype>& x)
{
data_ = x.data_;
stride_ = x.stride_;
length_ = x.length_;
}
#endif
P_numtype operator[](int i) const
{
BZPRECONDITION(i < length_);
return data_[i*stride_];
}
P_numtype& restrict operator[](int i)
{
BZPRECONDITION(i < length_);
return data_[i*stride_];
}
P_numtype operator()(int i) const
{
BZPRECONDITION(i < length_);
return data_[i*stride_];
}
P_numtype& restrict operator()(int i)
{
BZPRECONDITION(i < length_);
return data_[i*stride_];
}
P_numtype operator*() const
{ return *data_; }
P_numtype& operator*()
{ return *data_; }
VectorIter<P_numtype> operator+(int i)
{
// NEEDS_WORK -- precondition checking?
return VectorIter<P_numtype>(data_+i*stride_, stride_, length_-i);
}
int length(int) const
{ return length_; }
bool isUnitStride() const
{ return (stride_ == 1); }
/////////////////////////////////////////////
// Library-internal member functions
// These are undocumented and may change or
// disappear in future releases.
/////////////////////////////////////////////
static const int
_bz_staticLengthCount = 0,
_bz_dynamicLengthCount = 1,
_bz_staticLength = 0;
bool _bz_hasFastAccess() const
{ return isUnitStride(); }
P_numtype _bz_fastAccess(int i) const
{ return data_[i]; }
P_numtype& restrict _bz_fastAccess(int i)
{ return data_[i]; }
int _bz_suggestLength() const
{ return length_; }
private:
VectorIter() { }
P_numtype * restrict data_;
int stride_;
int length_;
};
template<typename P_numtype>
class VectorIterConst {
public:
typedef P_numtype T_numtype;
explicit VectorIterConst(const Vector<P_numtype>& x)
: data_(x.data())
{
stride_ = x.stride();
length_ = x.length();
}
#ifdef BZ_MANUAL_VECEXPR_COPY_CONSTRUCTOR
VectorIterConst(const VectorIterConst<P_numtype>& x)
{
data_ = x.data_;
stride_ = x.stride_;
length_ = x.length_;
}
#endif
P_numtype operator[](int i) const
{
BZPRECONDITION(i < length_);
return data_[i*stride_];
}
P_numtype operator()(int i) const
{
BZPRECONDITION(i < length_);
return data_[i*stride_];
}
int length(int) const
{ return length_; }
bool isUnitStride() const
{ return (stride_ == 1); }
/////////////////////////////////////////////
// Library-internal member functions
// These are undocumented and may change or
// disappear in future releases.
/////////////////////////////////////////////
static const int
_bz_staticLengthCount = 0,
_bz_dynamicLengthCount = 1,
_bz_staticLength = 0;
bool _bz_hasFastAccess() const
{ return isUnitStride(); }
P_numtype _bz_fastAccess(int i) const
{
return data_[i];
}
int _bz_suggestLength() const
{ return length_; }
private:
const P_numtype * restrict data_;
int stride_;
int length_;
};
BZ_NAMESPACE_END
#endif // BZ_VECITER_H
|
