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- // Copyright 2002 The Trustees of Indiana University.
- // Use, modification and distribution is subject to the Boost Software
- // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt)
- // Boost.MultiArray Library
- // Authors: Ronald Garcia
- // Jeremy Siek
- // Andrew Lumsdaine
- // See http://www.boost.org/libs/multi_array for documentation.
- //
- // resize.cpp - Test of resizing multi_arrays
- //
- #include <boost/core/lightweight_test.hpp>
- #include <boost/multi_array.hpp>
- #include <iostream>
- using namespace std;
- int main() {
- typedef boost::multi_array<int,3> marray;
- int A_data[] = {
- 0,1,2,3,
- 4,5,6,7,
- 8,9,10,11,
- 12,13,14,15,
- 16,17,18,19,
- 20,21,22,23
- };
- int A_resize[] = {
- 0,1,
- 4,5,
- 8,9,
- 12,13,
- 16,17,
- 20,21,
- 0,0,
- 0,0,
- 0,0,
- 0,0,
- 0,0,
- 0,0
- };
- // resize through the extent_gen interface
- {
- marray A(boost::extents[2][3][4]);
- A.assign(A_data,A_data+(2*3*4));
- A.resize(boost::extents[4][3][2]);
- BOOST_TEST(std::equal(A_resize,A_resize+(4*3*2),A.data()));
- }
- // resize through the Collection
- {
- marray A(boost::extents[2][3][4]);
- A.assign(A_data,A_data+(2*3*4));
- boost::array<int,3> new_extents = {{4,3,2}};
- A.resize(new_extents);
- BOOST_TEST(std::equal(A_resize,A_resize+(4*3*2),A.data()));
- }
- // default construct all the new elements (in this case, all elements)
- {
- marray defaultA;
- defaultA.resize(boost::extents[2][3][4]);
- BOOST_TEST(std::accumulate(defaultA.data(),
- defaultA.data()+(2*3*4),0) == 0);
- }
- // verify the preservation of storage order
- {
- int tiling_graph_storage_order[] = {2, 0, 1};
- bool tiling_graph_index_order[] = {true, true, true};
-
- marray A(boost::extents[3][4][2],
- boost::general_storage_order<3>(tiling_graph_storage_order,
- tiling_graph_index_order));
- int value = 0;
- for (int i = 0; i < 3; i++) {
- for (int j = 0; j < 4; j++) {
- for (int k = 0; k < 2; k++) {
- *(A.data() + value) = value;
- ++value;
- }
- }
- }
- // "Resize" to the same size
- A.resize(boost::extents[3][4][2]);
- int check = 0;
- for (int x = 0; x < 3; x++) {
- for (int y = 0; y < 4; y++) {
- for (int z = 0; z < 2; z++) {
- BOOST_TEST(*(A.data() + check) == check);
- ++check;
- }
- }
- }
- }
- // Resizing that changes index bases too (impl bug caused an assert)
- {
- typedef boost::multi_array<int, 1> ar_t;
- typedef ar_t::extent_range range;
- ar_t ar;
- ar.resize(boost::extents[range(-3, 3)]);
- }
- return boost::report_errors();
- }
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