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#include <thrust/iterator/retag.h>
#include <thrust/sort.h>
#include <unittest/unittest.h>
template <class Vector>
void TestIsSortedSimple()
{
typedef typename Vector::value_type T;
Vector v(4);
v[0] = 0;
v[1] = 5;
v[2] = 8;
v[3] = 0;
ASSERT_EQUAL(thrust::is_sorted(v.begin(), v.begin() + 0), true);
ASSERT_EQUAL(thrust::is_sorted(v.begin(), v.begin() + 1), true);
// the following line crashes gcc 4.3
#if (__GNUC__ == 4) && (__GNUC_MINOR__ == 3)
// do nothing
#else
// compile this line on other compilers
ASSERT_EQUAL(thrust::is_sorted(v.begin(), v.begin() + 2), true);
#endif // GCC
ASSERT_EQUAL(thrust::is_sorted(v.begin(), v.begin() + 3), true);
ASSERT_EQUAL(thrust::is_sorted(v.begin(), v.begin() + 4), false);
ASSERT_EQUAL(thrust::is_sorted(v.begin(), v.begin() + 3, thrust::less<T>()), true);
ASSERT_EQUAL(thrust::is_sorted(v.begin(), v.begin() + 1, thrust::greater<T>()), true);
ASSERT_EQUAL(thrust::is_sorted(v.begin(), v.begin() + 4, thrust::greater<T>()), false);
ASSERT_EQUAL(thrust::is_sorted(v.begin(), v.end()), false);
}
DECLARE_VECTOR_UNITTEST(TestIsSortedSimple);
template <class Vector>
void TestIsSortedRepeatedElements()
{
Vector v(10);
v[0] = 0;
v[1] = 1;
v[2] = 1;
v[3] = 2;
v[4] = 3;
v[5] = 4;
v[6] = 5;
v[7] = 5;
v[8] = 5;
v[9] = 6;
ASSERT_EQUAL(true, thrust::is_sorted(v.begin(), v.end()));
}
DECLARE_VECTOR_UNITTEST(TestIsSortedRepeatedElements);
template <class Vector>
void TestIsSorted()
{
typedef typename Vector::value_type T;
const size_t n = (1 << 16) + 13;
Vector v = unittest::random_integers<T>(n);
v[0] = 1;
v[1] = 0;
ASSERT_EQUAL(thrust::is_sorted(v.begin(), v.end()), false);
thrust::sort(v.begin(), v.end());
ASSERT_EQUAL(thrust::is_sorted(v.begin(), v.end()), true);
}
DECLARE_INTEGRAL_VECTOR_UNITTEST(TestIsSorted);
template <typename InputIterator>
bool is_sorted(my_system& system, InputIterator /*first*/, InputIterator)
{
system.validate_dispatch();
return false;
}
void TestIsSortedDispatchExplicit()
{
thrust::device_vector<int> vec(1);
my_system sys(0);
thrust::is_sorted(sys, vec.begin(), vec.end());
ASSERT_EQUAL(true, sys.is_valid());
}
DECLARE_UNITTEST(TestIsSortedDispatchExplicit);
template <typename InputIterator>
bool is_sorted(my_tag, InputIterator first, InputIterator)
{
*first = 13;
return false;
}
void TestIsSortedDispatchImplicit()
{
thrust::device_vector<int> vec(1);
thrust::is_sorted(thrust::retag<my_tag>(vec.begin()), thrust::retag<my_tag>(vec.end()));
ASSERT_EQUAL(13, vec.front());
}
DECLARE_UNITTEST(TestIsSortedDispatchImplicit);
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