1// Copyright 2002 The Trustees of Indiana University.
2
3// Use, modification and distribution is subject to the Boost Software
4// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
5// http://www.boost.org/LICENSE_1_0.txt)
6
7// Boost.MultiArray Library
8// Authors: Ronald Garcia
9// Jeremy Siek
10// Andrew Lumsdaine
11// See http://www.boost.org/libs/multi_array for documentation.
12
13//
14// index_bases - test of the index_base modifying facilities.
15//
16
17#include <boost/multi_array.hpp>
18
19#include <boost/core/lightweight_test.hpp>
20
21#include <boost/array.hpp>
22#include <vector>
23#include <iostream>
24int
25main()
26{
27 typedef boost::multi_array<double, 3> array;
28 typedef boost::multi_array_ref<double, 3> array_ref;
29 typedef boost::const_multi_array_ref<double, 3> const_array_ref;
30 typedef array::array_view<3>::type array_view;
31
32 typedef array::size_type size_type;
33 typedef array::extent_range range;
34 typedef array::index_range irange;
35
36 array::extent_gen extents;
37 array::index_gen indices;
38
39 // Construct with nonzero bases
40 {
41
42 array A(extents[range(1,4)][range(2,5)][range(3,6)]);
43 array B(extents[3][3][3]);
44
45 double ptr[27];
46 array_ref
47 C(ptr,extents[range(1,4)][range(2,5)][range(3,6)]);
48
49 const_array_ref
50 D(ptr,extents[range(1,4)][range(2,5)][range(3,6)]);
51
52 array_view E = A[indices[irange()][irange()][irange()]];
53
54 std::vector<double> vals;
55 for (int i = 0; i < 27; ++i)
56 vals.push_back(x: i);
57
58 A.assign(begin: vals.begin(),end: vals.end());
59 B.assign(begin: vals.begin(),end: vals.end());
60 C.assign(begin: vals.begin(),end: vals.end());
61
62 boost::array<int,3> bases = { .elems: { 1, 2, 3 } };
63 for (size_type a = 0; a < A.shape()[0]; ++a)
64 for (size_type b = 0; b < A.shape()[1]; ++b)
65 for (size_type c = 0; c < A.shape()[2]; ++c) {
66 BOOST_TEST(A[a+bases[0]][b+bases[1]][c+bases[2]] == B[a][b][c]);
67 BOOST_TEST(C[a+bases[0]][b+bases[1]][c+bases[2]] == B[a][b][c]);
68 BOOST_TEST(D[a+bases[0]][b+bases[1]][c+bases[2]] == B[a][b][c]);
69 // Test that E does not inherit A's index_base
70 BOOST_TEST(E[a][b][c] == B[a][b][c]);
71 }
72 }
73
74 // Reindex
75 {
76 typedef array::size_type size_type;
77 array A(extents[3][3][3]), B(extents[3][3][3]);
78
79 double ptr[27];
80 array_ref C(ptr,extents[3][3][3]);
81 const_array_ref D(ptr,extents[3][3][3]);
82
83 array_view E = B[indices[irange()][irange()][irange()]];
84
85 std::vector<double> vals;
86 for (int i = 0; i < 27; ++i)
87 vals.push_back(x: i);
88
89 A.assign(begin: vals.begin(),end: vals.end());
90 B.assign(begin: vals.begin(),end: vals.end());
91 C.assign(begin: vals.begin(),end: vals.end());
92
93 boost::array<int,3> bases = { .elems: { 1, 2, 3 } };
94
95 A.reindex(values: bases);
96 C.reindex(values: bases);
97 D.reindex(values: bases);
98 E.reindex(values: bases);
99
100 for (size_type a = 0; a < A.shape()[0]; ++a)
101 for (size_type b = 0; b < A.shape()[1]; ++b)
102 for (size_type c = 0; c < A.shape()[2]; ++c) {
103 BOOST_TEST(A[a+bases[0]][b+bases[1]][c+bases[2]] == B[a][b][c]);
104 BOOST_TEST(C[a+bases[0]][b+bases[1]][c+bases[2]] == B[a][b][c]);
105 BOOST_TEST(D[a+bases[0]][b+bases[1]][c+bases[2]] == B[a][b][c]);
106 BOOST_TEST(E[a+bases[0]][b+bases[1]][c+bases[2]] == B[a][b][c]);
107 }
108 }
109
110 // Set Index Base
111 {
112 typedef array::size_type size_type;
113 array A(extents[3][3][3]), B(extents[3][3][3]);
114
115 double ptr[27];
116 array_ref C(ptr,extents[3][3][3]);
117 const_array_ref D(ptr,extents[3][3][3]);
118
119 array_view E = B[indices[irange()][irange()][irange()]];
120
121 std::vector<double> vals;
122 for (int i = 0; i < 27; ++i)
123 vals.push_back(x: i);
124
125 A.assign(begin: vals.begin(),end: vals.end());
126 B.assign(begin: vals.begin(),end: vals.end());
127 C.assign(begin: vals.begin(),end: vals.end());
128
129#ifdef BOOST_NO_SFINAE
130 typedef boost::multi_array_types::index index;
131 A.reindex(index(1));
132 C.reindex(index(1));
133 D.reindex(index(1));
134 E.reindex(index(1));
135#else
136 A.reindex(value: 1);
137 C.reindex(value: 1);
138 D.reindex(value: 1);
139 E.reindex(value: 1);
140#endif
141
142 for (size_type a = 0; a < A.shape()[0]; ++a)
143 for (size_type b = 0; b < A.shape()[1]; ++b)
144 for (size_type c = 0; c < A.shape()[2]; ++c) {
145 BOOST_TEST(A[a+1][b+1][c+1] == B[a][b][c]);
146 BOOST_TEST(C[a+1][b+1][c+1] == B[a][b][c]);
147 BOOST_TEST(D[a+1][b+1][c+1] == B[a][b][c]);
148 BOOST_TEST(E[a+1][b+1][c+1] == B[a][b][c]);
149 }
150 }
151
152 return boost::report_errors();
153}
154

source code of boost/libs/multi_array/test/index_bases.cpp