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
|
//# TSMShape.cc: A vector of integers, used to index into arrays.
//# Copyright (C) 1994,1995,1996,1997
//# Associated Universities, Inc. Washington DC, USA.
//#
//# This library is free software; you can redistribute it and/or modify it
//# under the terms of the GNU Library General Public License as published by
//# the Free Software Foundation; either version 2 of the License, or (at your
//# option) any later version.
//#
//# This library 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 Library General Public
//# License for more details.
//#
//# You should have received a copy of the GNU Library General Public License
//# along with this library; if not, write to the Free Software Foundation,
//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//#
//# Correspondence concerning AIPS++ should be addressed as follows:
//# Internet email: casa-feedback@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
#include <casacore/tables/DataMan/TSMShape.h>
#include <casacore/casa/Arrays/ArrayError.h>
namespace casacore { //# NAMESPACE CASACORE - BEGIN
TSMShape::TSMShape()
: data_p (),
size_p (0)
{}
TSMShape::TSMShape (const IPosition& shape)
: data_p (shape.nelements()),
size_p (shape.nelements())
{
if (size_p > 0) {
data_p(0) = 1;
for (uInt i=1; i<size_p; i++) {
data_p(i) = data_p(i-1) * shape(i-1);
}
}
}
TSMShape::TSMShape (const TSMShape& other)
: data_p (other.data_p),
size_p (other.size_p)
{}
TSMShape& TSMShape::operator= (const TSMShape& other)
{
data_p = other.data_p;
size_p = other.size_p;
return *this;
}
TSMShape::~TSMShape()
{}
// Calculate the offset for a given position.
size_t TSMShape::offset (const IPosition& position) const
{
if (size_p != position.nelements()) {
throw (ArrayConformanceError(
"TSMShape::offset - shapes do not conform"));
}
size_t off = 0;
for (uInt i=0; i<size_p; i++) {
off += position(i) * data_p(i);
}
return off;
}
size_t TSMShape::offset (const IPosition& position,
const IPosition& origin) const
{
if (size_p != position.nelements() || size_p != origin.nelements()) {
throw (ArrayConformanceError(
"TSMShape::offset - shapes do not conform"));
}
size_t off = 0;
for (uInt i=0; i<size_p; i++) {
off += (position(i) - origin(i)) * data_p(i);
}
return off;
}
// Calculate the position for a given offset.
IPosition TSMShape::position (size_t offset) const
{
IPosition pos(size_p);
if (size_p > 0) {
for (uInt i=size_p-1; i>0; i--) {
pos(i) = offset / data_p(i);
offset -= pos(i) * data_p(i);
}
pos(0) = offset;
}
return pos;
}
IPosition TSMShape::position (size_t offset, const IPosition& origin) const
{
if (size_p != origin.nelements()) {
throw (ArrayConformanceError(
"TSMShape::position - shapes do not conform"));
}
IPosition pos(size_p);
if (size_p > 0) {
for (uInt i=size_p-1; i>0; i--) {
pos(i) = offset / data_p(i);
offset -= pos(i) * data_p(i);
pos(i) += origin(i);
}
pos(0) = offset + origin(0);
}
return pos;
}
IPosition TSMShape::offsetIncrement (const IPosition& subShape) const
{
if (size_p != subShape.nelements()) {
throw (ArrayConformanceError(
"TSMShape::offsetIncrement - shapes do not conform"));
}
IPosition incr(size_p,1);
for (uInt i=1; i<size_p; i++) {
incr(i) = data_p(i) - subShape(i-1) * data_p(i-1);
}
return incr;
}
IPosition TSMShape::offsetIncrement (const IPosition& subShape,
const IPosition& stride) const
{
if (size_p != subShape.nelements() || size_p != stride.nelements()) {
throw (ArrayConformanceError(
"TSMShape::offsetIncrement - shapes do not conform"));
}
IPosition incr(size_p,1);
for (uInt i=1; i<size_p; i++) {
incr(i) = stride(i) * data_p(i) -
subShape(i-1) * stride(i-1) * data_p(i-1);
}
return incr;
}
} //# NAMESPACE CASACORE - END
|
