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 // resize.cpp - Test of resizing multi_arrays
15 //
16
17 #include <boost/core/lightweight_test.hpp>
18 #include <boost/multi_array.hpp>
19 #include <iostream>
20 using namespace std;
21
22
main()23 int main() {
24
25 typedef boost::multi_array<int,3> marray;
26
27
28 int A_data[] = {
29 0,1,2,3,
30 4,5,6,7,
31 8,9,10,11,
32
33 12,13,14,15,
34 16,17,18,19,
35 20,21,22,23
36 };
37
38 int A_resize[] = {
39 0,1,
40 4,5,
41 8,9,
42
43 12,13,
44 16,17,
45 20,21,
46
47 0,0,
48 0,0,
49 0,0,
50
51 0,0,
52 0,0,
53 0,0
54 };
55
56 // resize through the extent_gen interface
57 {
58 marray A(boost::extents[2][3][4]);
59 A.assign(A_data,A_data+(2*3*4));
60 A.resize(boost::extents[4][3][2]);
61 BOOST_TEST(std::equal(A_resize,A_resize+(4*3*2),A.data()));
62 }
63
64 // resize through the Collection
65 {
66 marray A(boost::extents[2][3][4]);
67 A.assign(A_data,A_data+(2*3*4));
68 boost::array<int,3> new_extents = {{4,3,2}};
69 A.resize(new_extents);
70 BOOST_TEST(std::equal(A_resize,A_resize+(4*3*2),A.data()));
71 }
72
73 // default construct all the new elements (in this case, all elements)
74 {
75 marray defaultA;
76 defaultA.resize(boost::extents[2][3][4]);
77 BOOST_TEST(std::accumulate(defaultA.data(),
78 defaultA.data()+(2*3*4),0) == 0);
79 }
80
81
82
83 // verify the preservation of storage order
84 {
85 int tiling_graph_storage_order[] = {2, 0, 1};
86 bool tiling_graph_index_order[] = {true, true, true};
87
88 marray A(boost::extents[3][4][2],
89 boost::general_storage_order<3>(tiling_graph_storage_order,
90 tiling_graph_index_order));
91
92
93 int value = 0;
94 for (int i = 0; i < 3; i++) {
95 for (int j = 0; j < 4; j++) {
96 for (int k = 0; k < 2; k++) {
97 *(A.data() + value) = value;
98 ++value;
99 }
100 }
101 }
102
103 // "Resize" to the same size
104 A.resize(boost::extents[3][4][2]);
105
106 int check = 0;
107 for (int x = 0; x < 3; x++) {
108 for (int y = 0; y < 4; y++) {
109 for (int z = 0; z < 2; z++) {
110 BOOST_TEST(*(A.data() + check) == check);
111 ++check;
112 }
113 }
114 }
115 }
116
117 // Resizing that changes index bases too (impl bug caused an assert)
118 {
119 typedef boost::multi_array<int, 1> ar_t;
120 typedef ar_t::extent_range range;
121 ar_t ar;
122 ar.resize(boost::extents[range(-3, 3)]);
123 }
124
125
126 return boost::report_errors();
127 }
128