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//@HEADER
// ************************************************************************
//
// Kokkos v. 4.0
// Copyright (2022) National Technology & Engineering
// Solutions of Sandia, LLC (NTESS).
//
// Under the terms of Contract DE-NA0003525 with NTESS,
// the U.S. Government retains certain rights in this software.
//
// Part of Kokkos, under the Apache License v2.0 with LLVM Exceptions.
// See https://kokkos.org/LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//@HEADER
#include <TestStdAlgorithmsCommon.hpp>
#include <utility>
namespace Test {
namespace stdalgos {
namespace UniqueCopy {
namespace KE = Kokkos::Experimental;
// impl is here for std because it is only avail from c++>=17
template <class InputIterator, class OutputIterator, class BinaryPredicate>
auto my_unique_copy(InputIterator first, InputIterator last,
OutputIterator result, BinaryPredicate pred) {
if (first != last) {
typename OutputIterator::value_type t(*first);
*result = t;
++result;
while (++first != last) {
if (!pred(t, *first)) {
t = *first;
*result = t;
++result;
}
}
}
return result;
}
template <class InputIterator, class OutputIterator>
auto my_unique_copy(InputIterator first, InputIterator last,
OutputIterator result) {
using value_type = typename OutputIterator::value_type;
using func_t = IsEqualFunctor<value_type>;
return my_unique_copy(first, last, result, func_t());
}
template <class ValueType>
struct UnifDist;
template <>
struct UnifDist<int> {
using dist_type = std::uniform_int_distribution<int>;
std::mt19937 m_gen;
dist_type m_dist;
UnifDist() : m_dist(2, 7) { m_gen.seed(1034343); }
int operator()() { return m_dist(m_gen); }
};
template <class ViewType>
std::size_t fill_view(ViewType dest_view, const std::string& name) {
using value_type = typename ViewType::value_type;
using exe_space = typename ViewType::execution_space;
const std::size_t ext = dest_view.extent(0);
using aux_view_t = Kokkos::View<value_type*, exe_space>;
aux_view_t aux_view("aux_view", ext);
auto v_h = create_mirror_view(Kokkos::HostSpace(), aux_view);
std::size_t count = 0;
if (name == "empty") {
// no op
}
else if (name == "one-element-a") {
v_h(0) = static_cast<value_type>(1);
count = 1;
}
else if (name == "one-element-b") {
v_h(0) = static_cast<value_type>(2);
count = 1;
}
else if (name == "two-elements-a") {
v_h(0) = static_cast<value_type>(1);
v_h(1) = static_cast<value_type>(2);
count = 2;
}
else if (name == "two-elements-b") {
v_h(0) = static_cast<value_type>(2);
v_h(1) = static_cast<value_type>(-1);
count = 2;
}
else if (name == "small-a") {
v_h(0) = static_cast<value_type>(0);
v_h(1) = static_cast<value_type>(1);
v_h(2) = static_cast<value_type>(1);
v_h(3) = static_cast<value_type>(2);
v_h(4) = static_cast<value_type>(3);
v_h(5) = static_cast<value_type>(4);
v_h(6) = static_cast<value_type>(4);
v_h(7) = static_cast<value_type>(4);
v_h(8) = static_cast<value_type>(5);
v_h(9) = static_cast<value_type>(6);
v_h(10) = static_cast<value_type>(6);
count = 7;
}
else if (name == "small-b") {
v_h(0) = static_cast<value_type>(1);
v_h(1) = static_cast<value_type>(1);
v_h(2) = static_cast<value_type>(1);
v_h(3) = static_cast<value_type>(2);
v_h(4) = static_cast<value_type>(3);
v_h(5) = static_cast<value_type>(4);
v_h(6) = static_cast<value_type>(4);
v_h(7) = static_cast<value_type>(4);
v_h(8) = static_cast<value_type>(5);
v_h(9) = static_cast<value_type>(6);
v_h(10) = static_cast<value_type>(8);
v_h(11) = static_cast<value_type>(9);
v_h(12) = static_cast<value_type>(8);
count = 9;
}
else if (name == "medium" || name == "large") {
UnifDist<value_type> randObj;
for (std::size_t i = 0; i < ext; ++i) {
v_h(i) = randObj();
}
std::vector<value_type> tmp(v_h.extent(0));
std::fill(tmp.begin(), tmp.end(), static_cast<value_type>(0));
using func_t = IsEqualFunctor<value_type>;
auto std_r =
my_unique_copy(KE::cbegin(v_h), KE::cend(v_h), tmp.begin(), func_t());
count = (std::size_t)(std_r - tmp.begin());
}
else {
Kokkos::abort("invalid choice");
}
Kokkos::deep_copy(aux_view, v_h);
CopyFunctor<aux_view_t, ViewType> F1(aux_view, dest_view);
Kokkos::parallel_for("copy", dest_view.extent(0), F1);
return count;
}
template <class ViewTypeFrom, class ViewTypeTest, class... Args>
void verify_data(const std::string& name, ViewTypeFrom view_from,
ViewTypeTest view_test, Args... args) {
using value_type = typename ViewTypeTest::value_type;
//! always careful because views might not be deep copyable
auto view_test_dc = create_deep_copyable_compatible_clone(view_test);
auto view_test_h =
create_mirror_view_and_copy(Kokkos::HostSpace(), view_test_dc);
auto view_from_dc = create_deep_copyable_compatible_clone(view_from);
auto view_from_h =
create_mirror_view_and_copy(Kokkos::HostSpace(), view_from_dc);
if (name == "empty") {
// no op
}
else if (name == "one-element-a") {
ASSERT_EQ(view_test_h(0), static_cast<value_type>(1));
}
else if (name == "one-element-b") {
ASSERT_EQ(view_test_h(0), static_cast<value_type>(2));
}
else if (name == "two-elements-a") {
ASSERT_EQ(view_test_h(0), static_cast<value_type>(1));
ASSERT_EQ(view_test_h(1), static_cast<value_type>(2));
}
else if (name == "two-elements-b") {
ASSERT_EQ(view_test_h(0), static_cast<value_type>(2));
ASSERT_EQ(view_test_h(1), static_cast<value_type>(-1));
}
else if (name == "small-a") {
ASSERT_EQ(view_test_h(0), static_cast<value_type>(0));
ASSERT_EQ(view_test_h(1), static_cast<value_type>(1));
ASSERT_EQ(view_test_h(2), static_cast<value_type>(2));
ASSERT_EQ(view_test_h(3), static_cast<value_type>(3));
ASSERT_EQ(view_test_h(4), static_cast<value_type>(4));
ASSERT_EQ(view_test_h(5), static_cast<value_type>(5));
ASSERT_EQ(view_test_h(6), static_cast<value_type>(6));
ASSERT_EQ(view_test_h(7), static_cast<value_type>(0));
ASSERT_EQ(view_test_h(8), static_cast<value_type>(0));
ASSERT_EQ(view_test_h(9), static_cast<value_type>(0));
ASSERT_EQ(view_test_h(10), static_cast<value_type>(0));
}
else if (name == "small-b") {
ASSERT_EQ(view_test_h(0), static_cast<value_type>(1));
ASSERT_EQ(view_test_h(1), static_cast<value_type>(2));
ASSERT_EQ(view_test_h(2), static_cast<value_type>(3));
ASSERT_EQ(view_test_h(3), static_cast<value_type>(4));
ASSERT_EQ(view_test_h(4), static_cast<value_type>(5));
ASSERT_EQ(view_test_h(5), static_cast<value_type>(6));
ASSERT_EQ(view_test_h(6), static_cast<value_type>(8));
ASSERT_EQ(view_test_h(7), static_cast<value_type>(9));
ASSERT_EQ(view_test_h(8), static_cast<value_type>(8));
ASSERT_EQ(view_test_h(9), static_cast<value_type>(0));
ASSERT_EQ(view_test_h(10), static_cast<value_type>(0));
ASSERT_EQ(view_test_h(11), static_cast<value_type>(0));
ASSERT_EQ(view_test_h(12), static_cast<value_type>(0));
}
else if (name == "medium" || name == "large") {
std::vector<value_type> tmp(view_test_h.extent(0));
std::fill(tmp.begin(), tmp.end(), static_cast<value_type>(0));
auto std_r = my_unique_copy(KE::cbegin(view_from_h), KE::cend(view_from_h),
tmp.begin(), args...);
(void)std_r;
for (std::size_t i = 0; i < view_from_h.extent(0); ++i) {
ASSERT_EQ(view_test_h(i), tmp[i]);
}
}
else {
FAIL() << "invalid choice";
}
}
std::string value_type_to_string(int) { return "int"; }
std::string value_type_to_string(double) { return "double"; }
template <class Tag, class ValueType>
void print_scenario_details(const std::string& name) {
std::cout << "unique_copy: default predicate: " << name << ", "
<< view_tag_to_string(Tag{}) << " "
<< value_type_to_string(ValueType()) << '\n';
}
template <class Tag, class ValueType, class Predicate>
void print_scenario_details(const std::string& name, Predicate pred) {
(void)pred;
std::cout << "unique_copy: custom predicate: " << name << ", "
<< view_tag_to_string(Tag{}) << " "
<< value_type_to_string(ValueType()) << '\n';
}
template <class Tag, class ValueType, class InfoType, class... Args>
void run_single_scenario(const InfoType& scenario_info, Args... args) {
const auto name = std::get<0>(scenario_info);
const std::size_t view_ext = std::get<1>(scenario_info);
// print_scenario_details<Tag, ValueType>(name, args...);
auto view_from = create_view<ValueType>(Tag{}, view_ext, "unique_copy_from");
auto n = fill_view(view_from, name);
{
auto view_dest =
create_view<ValueType>(Tag{}, view_ext, "unique_copy_dest");
auto rit =
KE::unique_copy(exespace(), KE::cbegin(view_from), KE::cend(view_from),
KE::begin(view_dest), args...);
verify_data(name, view_from, view_dest, args...);
ASSERT_EQ(rit, (KE::begin(view_dest) + n));
}
{
auto view_dest =
create_view<ValueType>(Tag{}, view_ext, "unique_copy_dest");
auto rit =
KE::unique_copy("label", exespace(), KE::cbegin(view_from),
KE::cend(view_from), KE::begin(view_dest), args...);
verify_data(name, view_from, view_dest, args...);
ASSERT_EQ(rit, (KE::begin(view_dest) + n));
}
{
auto view_dest =
create_view<ValueType>(Tag{}, view_ext, "unique_copy_dest");
auto rit = KE::unique_copy(exespace(), view_from, view_dest, args...);
verify_data(name, view_from, view_dest, args...);
ASSERT_EQ(rit, (KE::begin(view_dest) + n));
}
{
auto view_dest =
create_view<ValueType>(Tag{}, view_ext, "unique_copy_dest");
auto rit =
KE::unique_copy("label", exespace(), view_from, view_dest, args...);
verify_data(name, view_from, view_dest, args...);
ASSERT_EQ(rit, (KE::begin(view_dest) + n));
}
Kokkos::fence();
}
template <class Tag, class ValueType>
void run_all_scenarios() {
const std::map<std::string, std::size_t> scenarios = {
{"empty", 0}, {"one-element-a", 1}, {"one-element-b", 1},
{"two-elements-a", 2}, {"two-elements-b", 2}, {"small-a", 11},
{"small-b", 13}, {"medium", 21103}, {"large", 101513}};
for (const auto& it : scenarios) {
run_single_scenario<Tag, ValueType>(it);
using func_t = IsEqualFunctor<ValueType>;
run_single_scenario<Tag, ValueType>(it, func_t());
}
}
TEST(std_algorithms_mod_seq_ops, unique_copy) {
run_all_scenarios<DynamicTag, int>();
run_all_scenarios<StridedThreeTag, int>();
}
} // namespace UniqueCopy
} // namespace stdalgos
} // namespace Test
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