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// Copyright 2019 Glen Joseph Fernandes
// (glenjofe@gmail.com)
//
// Distributed under 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)
#include <boost/core/lightweight_test.hpp>
#include <boost/multi_array.hpp>
#include <algorithm>
template<class T>
class creator {
public:
typedef T value_type;
typedef T* pointer;
typedef std::size_t size_type;
typedef std::ptrdiff_t difference_type;
template<class U>
struct rebind {
typedef creator<U> other;
};
creator(int state)
: state_(state) { }
template<class U>
creator(const creator<U>& other)
: state_(other.state()) { }
T* allocate(std::size_t size) {
return static_cast<T*>(::operator new(sizeof(T) * size));
}
void deallocate(T* ptr, std::size_t) {
::operator delete(ptr);
}
int state() const {
return state_;
}
private:
int state_;
};
template<class T, class U>
inline bool
operator==(const creator<T>& a, const creator<U>& b)
{
return a.state() == b.state();
}
template<class T, class U>
inline bool
operator!=(const creator<T>& a, const creator<U>& b)
{
return !(a == b);
}
void test(const double&, std::size_t*, int*, unsigned)
{
}
template<class Array>
void test(const Array& array, std::size_t* sizes, int* strides,
unsigned elements)
{
BOOST_TEST(array.num_elements() == elements);
BOOST_TEST(array.size() == *sizes);
BOOST_TEST(std::equal(sizes, sizes + array.num_dimensions(), array.shape()));
BOOST_TEST(std::equal(strides, strides + array.num_dimensions(),
array.strides()));
test(array[0], ++sizes, ++strides, elements / array.size());
}
bool test(const double& a, const double& b)
{
return a == b;
}
template<class A1, class A2>
bool test(const A1& a1, const A2& a2)
{
typename A1::const_iterator i1 = a1.begin();
typename A2::const_iterator i2 = a2.begin();
for (; i1 != a1.end(); ++i1, ++i2) {
if (!test(*i1, *i2)) {
return false;
}
}
return true;
}
int main()
{
typedef boost::multi_array<double, 3, creator<double> > type;
creator<double> state(1);
{
type array(state);
}
boost::array<type::size_type, 3> sizes = { { 3, 3, 3 } };
type::size_type elements = 27;
{
int strides[] = { 9, 3, 1 };
type array(sizes, state);
test(array, &sizes[0], strides, elements);
}
{
int strides[] = { 1, 3, 9 };
type array(sizes, boost::fortran_storage_order(), state);
test(array, &sizes[0], strides, elements);
}
{
int strides[] = { 9, 3, 1 };
type::extent_gen extents;
type array(extents[3][3][3], state);
test(array, &sizes[0], strides, elements);
}
{
type array1(sizes, state);
std::vector<double> values(elements, 4.5);
array1.assign(values.begin(), values.end());
type array2(array1);
int strides[] = { 9, 3, 1 };
test(array2, &sizes[0], strides, elements);
BOOST_TEST(test(array1, array2));
}
{
type array1(sizes, state);
type array2(sizes, state);
std::vector<double> values(elements, 4.5);
array1.assign(values.begin(), values.end());
array2 = array1;
int strides[] = { 9, 3, 1 };
test(array2, &sizes[0], strides, elements);
BOOST_TEST(test(array1, array2));
}
{
type array1(sizes, state);
std::vector<double> values(elements, 4.5);
array1.assign(values.begin(), values.end());
typedef type::subarray<2>::type other;
other array2 = array1[1];
other::value_type value = array2[0];
BOOST_TEST(test(array1[1][0], value));
BOOST_TEST(test(array2[0], value));
}
return boost::report_errors();
}
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