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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>
#include <algorithm>
namespace Test {
namespace stdalgos {
namespace RemoveCopyIf {
namespace KE = Kokkos::Experimental;
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(-100, 100) { m_gen.seed(1034343); }
int operator()() { return m_dist(m_gen); }
};
template <class ViewType>
void 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);
if (name == "empty") {
// no op
}
else if (name == "one-element-a") {
v_h(0) = static_cast<value_type>(1);
}
else if (name == "one-element-b") {
v_h(0) = static_cast<value_type>(2);
}
else if (name == "two-elements-a") {
v_h(0) = static_cast<value_type>(1);
v_h(1) = static_cast<value_type>(2);
}
else if (name == "two-elements-b") {
v_h(0) = static_cast<value_type>(2);
v_h(1) = static_cast<value_type>(-1);
}
else if (name == "small-a") {
for (std::size_t i = 0; i < ext; ++i) {
v_h(i) = static_cast<value_type>(i + 1);
}
}
else if (name == "small-b") {
for (std::size_t i = 0; i < ext; ++i) {
if (i % 2 == 0) {
v_h(i) = static_cast<value_type>(22);
} else {
v_h(i) = static_cast<value_type>(-12);
}
}
}
else if (name == "medium" || name == "large") {
UnifDist<value_type> randObj;
for (std::size_t i = 0; i < ext; ++i) {
v_h(i) = randObj();
}
}
else {
FAIL() << "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);
}
template <class ViewTypeFrom, class ViewTypeDest, class MyItResult,
class PredicateType>
void verify_data(ViewTypeFrom view_from, ViewTypeDest view_dest,
MyItResult my_result, PredicateType pred) {
// make a host copy of the view_from
auto view_from_h = create_host_space_copy(view_from);
const std::size_t ext = view_from_h.extent(0);
using value_type = typename ViewTypeFrom::value_type;
// run std::remove_copy_if
std::vector<value_type> gold_dest_std(ext);
auto std_result =
std::remove_copy_if(KE::cbegin(view_from_h), KE::cend(view_from_h),
gold_dest_std.begin(), pred);
// check that returned iterators are correct
const std::size_t std_diff = std_result - gold_dest_std.begin();
const std::size_t my_diff = my_result - KE::begin(view_dest);
ASSERT_EQ(std_diff, my_diff);
// check the actual data after algo has been applied
auto view_dest_h = create_host_space_copy(view_dest);
for (std::size_t i = 0; i < my_diff; ++i) {
ASSERT_EQ(view_dest_h(i), gold_dest_std[i]);
// std::cout << "i= " << i << " "
// << "mine: " << view_dest_h(i) << " "
// << "std: " << gold_dest_std[i]
// << '\n';
}
}
std::string value_type_to_string(int) { return "int"; }
std::string value_type_to_string(double) { return "double"; }
template <class Tag, class ValueType, class InfoType>
void run_single_scenario(const InfoType& scenario_info) {
const auto name = std::get<0>(scenario_info);
const std::size_t view_ext = std::get<1>(scenario_info);
// std::cout << "remove_copy_if: " << name << ", " <<
// view_tag_to_string(Tag{})
// << ", " << value_type_to_string(ValueType()) << std::endl;
using pred_type = IsEvenFunctor<ValueType>;
pred_type remove_if_even;
{
auto view_from =
create_view<ValueType>(Tag{}, view_ext, "remove_copy_if_view_from");
auto view_dest =
create_view<ValueType>(Tag{}, view_ext, "remove_copy_if_view_dest");
fill_view(view_from, name);
auto rit = KE::remove_copy_if(exespace(), KE::cbegin(view_from),
KE::cend(view_from), KE::begin(view_dest),
remove_if_even);
verify_data(view_from, view_dest, rit, remove_if_even);
}
{
auto view_from =
create_view<ValueType>(Tag{}, view_ext, "remove_copy_if_view_from");
auto view_dest =
create_view<ValueType>(Tag{}, view_ext, "remove_copy_if_view_dest");
fill_view(view_from, name);
auto rit = KE::remove_copy_if("label", exespace(), KE::cbegin(view_from),
KE::cend(view_from), KE::begin(view_dest),
remove_if_even);
verify_data(view_from, view_dest, rit, remove_if_even);
}
{
auto view_from =
create_view<ValueType>(Tag{}, view_ext, "remove_copy_if_view_from");
auto view_dest =
create_view<ValueType>(Tag{}, view_ext, "remove_copy_if_view_dest");
fill_view(view_from, name);
auto rit =
KE::remove_copy_if(exespace(), view_from, view_dest, remove_if_even);
verify_data(view_from, view_dest, rit, remove_if_even);
}
{
auto view_from =
create_view<ValueType>(Tag{}, view_ext, "remove_copy_if_view_from");
auto view_dest =
create_view<ValueType>(Tag{}, view_ext, "remove_copy_if_view_dest");
fill_view(view_from, name);
auto rit = KE::remove_copy_if("label", exespace(), view_from, view_dest,
remove_if_even);
verify_data(view_from, view_dest, rit, remove_if_even);
}
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", 9},
{"small-b", 13}, {"medium", 23103}, {"large", 101513}};
for (const auto& it : scenarios) {
run_single_scenario<Tag, ValueType>(it);
}
}
TEST(std_algorithms_mod_seq_ops, remove_copy_if) {
run_all_scenarios<DynamicTag, int>();
run_all_scenarios<StridedThreeTag, int>();
}
} // namespace RemoveCopyIf
} // namespace stdalgos
} // namespace Test
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