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#include <thrust/adjacent_difference.h>
#include <thrust/device_free.h>
#include <thrust/device_malloc.h>
#include <thrust/execution_policy.h>
#include <unittest/unittest.h>
struct detect_wrong_difference
{
bool* flag;
_CCCL_HOST_DEVICE detect_wrong_difference operator++() const
{
return *this;
}
_CCCL_HOST_DEVICE detect_wrong_difference operator*() const
{
return *this;
}
template <typename Difference>
_CCCL_HOST_DEVICE detect_wrong_difference operator+(Difference) const
{
return *this;
}
template <typename Index>
_CCCL_HOST_DEVICE detect_wrong_difference operator[](Index) const
{
return *this;
}
_CCCL_DEVICE void operator=(long long difference) const
{
if (difference != 1)
{
*flag = false;
}
}
};
void TestAdjacentDifferenceWithBigIndexesHelper(int magnitude)
{
thrust::counting_iterator<long long> begin(1);
thrust::counting_iterator<long long> end = begin + (1ll << magnitude);
ASSERT_EQUAL(thrust::distance(begin, end), 1ll << magnitude);
thrust::device_ptr<bool> all_differences_correct = thrust::device_malloc<bool>(1);
*all_differences_correct = true;
detect_wrong_difference out = {thrust::raw_pointer_cast(all_differences_correct)};
thrust::adjacent_difference(thrust::device, begin, end, out);
bool all_differences_correct_h = *all_differences_correct;
thrust::device_free(all_differences_correct);
ASSERT_EQUAL(all_differences_correct_h, true);
}
void TestAdjacentDifferenceWithBigIndexes()
{
TestAdjacentDifferenceWithBigIndexesHelper(30);
TestAdjacentDifferenceWithBigIndexesHelper(31);
TestAdjacentDifferenceWithBigIndexesHelper(32);
TestAdjacentDifferenceWithBigIndexesHelper(33);
}
DECLARE_UNITTEST(TestAdjacentDifferenceWithBigIndexes);
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