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//---------------------------------------------------------------------------//
// Copyright (c) 2014 Roshan <thisisroshansmail@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
//
// See http://boostorg.github.com/compute for more information.
//---------------------------------------------------------------------------//
#define BOOST_TEST_MODULE TestUnique
#include <boost/test/unit_test.hpp>
#include <boost/compute/function.hpp>
#include <boost/compute/algorithm/iota.hpp>
#include <boost/compute/algorithm/none_of.hpp>
#include <boost/compute/algorithm/transform.hpp>
#include <boost/compute/algorithm/unique.hpp>
#include <boost/compute/container/vector.hpp>
#include "check_macros.hpp"
#include "context_setup.hpp"
namespace compute = boost::compute;
BOOST_AUTO_TEST_CASE(unique_int)
{
int data[] = {1, 6, 6, 4, 2, 2, 4};
compute::vector<int> input(data, data + 7, queue);
compute::vector<int>::iterator iter =
compute::unique(input.begin(), input.end(), queue);
BOOST_VERIFY(iter == input.begin() + 5);
CHECK_RANGE_EQUAL(int, 7, input, (1, 6, 4, 2, 4, 2, 4));
}
BOOST_AUTO_TEST_CASE(all_same_float)
{
compute::vector<float> vec(1024, context);
compute::fill(vec.begin(), vec.end(), 3.14f, queue);
compute::vector<float>::iterator iter =
compute::unique(vec.begin(), vec.end(), queue);
BOOST_VERIFY(iter == vec.begin() + 1);
float first;
compute::copy_n(vec.begin(), 1, &first, queue);
BOOST_CHECK_EQUAL(first, 3.14f);
}
BOOST_AUTO_TEST_CASE(unique_even_uints)
{
using compute::uint_;
// create vector filled with [0, 1, 2, ...]
compute::vector<uint_> vec(1024, context);
compute::iota(vec.begin(), vec.end(), 0, queue);
// all should be unique
compute::vector<uint_>::iterator iter = compute::unique(
vec.begin(), vec.end(), queue
);
BOOST_VERIFY(iter == vec.end());
// if odd, return the prior even number, else return the number
BOOST_COMPUTE_FUNCTION(uint_, odd_to_even, (uint_ x),
{
if(x & 1){
return x - 1;
}
else {
return x;
}
});
// set all odd numbers the previous even number
compute::transform(
vec.begin(), vec.end(), vec.begin(), odd_to_even, queue
);
// now the vector should contain [0, 0, 2, 2, 4, 4, ...]
iter = compute::unique(vec.begin(), vec.end(), queue);
BOOST_VERIFY(iter == vec.begin() + (vec.size() / 2));
// ensure all of the values are even
BOOST_COMPUTE_FUNCTION(bool, is_odd, (uint_ x),
{
return x & 1;
});
BOOST_VERIFY(compute::none_of(vec.begin(), vec.end(), is_odd, queue));
}
BOOST_AUTO_TEST_SUITE_END()
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