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127 lines (99 loc) · 2.73 KB
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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();
}