98 lines
2.2 KiB
C++
98 lines
2.2 KiB
C++
// Copyright 2002 The Trustees of Indiana University.
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// Use, modification and distribution is subject to the Boost Software
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// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// Boost.MultiArray Library
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// Authors: Ronald Garcia
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// Jeremy Siek
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// Andrew Lumsdaine
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// See http://www.boost.org/libs/multi_array for documentation.
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//
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// reshape.cpp - testing reshaping functionality
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//
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#include <boost/multi_array.hpp>
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#include <boost/core/lightweight_test.hpp>
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#include <boost/array.hpp>
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#include <boost/type.hpp>
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int
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main()
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{
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const int ndims=3;
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typedef boost::multi_array<int,ndims> array;
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typedef boost::multi_array_ref<int,ndims> array_ref;
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typedef boost::const_multi_array_ref<int,ndims> const_array_ref;
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boost::array<array::size_type,ndims> dims = {{2,3,4}};
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boost::array<array::size_type,ndims> new_dims = {{4,3,2}};
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int data[] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,
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14,15,16,17,18,19,20,21,22,23};
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const int data_size=24;
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// Basic reshape test
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{
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array A(dims);
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A.assign(data,data+data_size);
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array_ref B(data,dims);
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const_array_ref C(data,dims);
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A.reshape(new_dims);
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B.reshape(new_dims);
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C.reshape(new_dims);
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int* ptr = data;
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for (array::index i = 0; i != 4; ++i)
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for (array::index j = 0; j != 3; ++j)
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for (array::index k = 0; k != 2; ++k) {
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BOOST_TEST(A[i][j][k] == *ptr);
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BOOST_TEST(B[i][j][k] == *ptr);
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BOOST_TEST(C[i][j][k] == *ptr++);
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}
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}
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// Ensure that index bases are preserved over reshape
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{
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boost::array<array::index,ndims> bases = {{0, 1, -1}};
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array A(dims);
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A.assign(data,data+data_size);
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array_ref B(data,dims);
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const_array_ref C(data,dims);
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A.reindex(bases);
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B.reindex(bases);
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C.reindex(bases);
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A.reshape(new_dims);
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B.reshape(new_dims);
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C.reshape(new_dims);
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int* ptr = data;
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for (array::index i = 0; i != 4; ++i)
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for (array::index j = 1; j != 4; ++j)
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for (array::index k = -1; k != 1; ++k) {
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BOOST_TEST(A[i][j][k] == *ptr);
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BOOST_TEST(B[i][j][k] == *ptr);
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BOOST_TEST(C[i][j][k] == *ptr++);
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}
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}
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return boost::report_errors();
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}
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