1 // -*- C++ -*- 2 //===-- rotate_copy.pass.cpp ----------------------------------------------===// 3 // 4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5 // See https://llvm.org/LICENSE.txt for license information. 6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7 // 8 //===----------------------------------------------------------------------===// 9 10 // UNSUPPORTED: c++98, c++03, c++11, c++14 11 12 #include "support/pstl_test_config.h" 13 14 #include <iterator> 15 #include <execution> 16 #include <algorithm> 17 18 #include "support/utils.h" 19 20 using namespace TestUtils; 21 22 template <typename T> 23 struct wrapper; 24 25 template <typename T> 26 bool 27 compare(const wrapper<T>& a, const wrapper<T>& b) 28 { 29 return a.t == b.t; 30 } 31 32 template <typename T> 33 bool 34 compare(const T& a, const T& b) 35 { 36 return a == b; 37 } 38 39 template <typename T> 40 struct wrapper 41 { 42 explicit wrapper(T t_) : t(t_) {} 43 wrapper& 44 operator=(const T& t_) 45 { 46 t = t_; 47 return *this; 48 } 49 friend bool 50 compare<T>(const wrapper<T>& a, const wrapper<T>& b); 51 52 private: 53 T t; 54 }; 55 56 template <typename T, typename It1, typename It2> 57 struct comparator 58 { 59 using T1 = typename std::iterator_traits<It1>::value_type; 60 using T2 = typename std::iterator_traits<It2>::value_type; 61 bool 62 operator()(T1 a, T2 b) 63 { 64 T temp = a; 65 return compare(temp, b); 66 } 67 }; 68 69 struct test_one_policy 70 { 71 72 #if _PSTL_ICC_17_VC141_TEST_SIMD_LAMBDA_DEBUG_32_BROKEN || \ 73 _PSTL_ICC_16_VC14_TEST_SIMD_LAMBDA_DEBUG_32_BROKEN // dummy specialization by policy type, in case of broken configuration 74 template <typename Iterator1, typename Iterator2> 75 typename std::enable_if<is_same_iterator_category<Iterator1, std::random_access_iterator_tag>::value, void>::type 76 operator()(pstl::execution::unsequenced_policy, Iterator1 data_b, Iterator1 data_e, Iterator2 actual_b, 77 Iterator2 actual_e, std::size_t shift) 78 { 79 } 80 template <typename Iterator1, typename Iterator2> 81 typename std::enable_if<is_same_iterator_category<Iterator1, std::random_access_iterator_tag>::value, void>::type 82 operator()(pstl::execution::parallel_unsequenced_policy, Iterator1 data_b, Iterator1 data_e, Iterator2 actual_b, 83 Iterator2 actual_e, std::size_t shift) 84 { 85 } 86 #endif 87 88 template <typename ExecutionPolicy, typename Iterator1, typename Iterator2> 89 void 90 operator()(ExecutionPolicy&& exec, Iterator1 data_b, Iterator1 data_e, Iterator2 actual_b, Iterator2 actual_e, 91 std::size_t shift) 92 { 93 using namespace std; 94 using T = typename iterator_traits<Iterator2>::value_type; 95 Iterator1 data_m = std::next(data_b, shift); 96 97 fill(actual_b, actual_e, T(-123)); 98 Iterator2 actual_return = rotate_copy(exec, data_b, data_m, data_e, actual_b); 99 100 EXPECT_TRUE(actual_return == actual_e, "wrong result of rotate_copy"); 101 auto comparer = comparator<T, Iterator1, Iterator2>(); 102 bool check = std::equal(data_m, data_e, actual_b, comparer); 103 check = check && std::equal(data_b, data_m, std::next(actual_b, std::distance(data_m, data_e)), comparer); 104 105 EXPECT_TRUE(check, "wrong effect of rotate_copy"); 106 } 107 }; 108 109 template <typename T1, typename T2> 110 void 111 test() 112 { 113 114 const std::size_t max_len = 100000; 115 116 Sequence<T2> actual(max_len, [](std::size_t i) { return T1(i); }); 117 118 Sequence<T1> data(max_len, [](std::size_t i) { return T1(i); }); 119 120 for (std::size_t len = 0; len < max_len; len = len <= 16 ? len + 1 : std::size_t(3.1415 * len)) 121 { 122 std::size_t shifts[] = {0, 1, 2, len / 3, (2 * len) / 3, len - 1}; 123 for (std::size_t shift : shifts) 124 { 125 if (shift > 0 && shift < len) 126 { 127 invoke_on_all_policies(test_one_policy(), data.begin(), data.begin() + len, actual.begin(), 128 actual.begin() + len, shift); 129 invoke_on_all_policies(test_one_policy(), data.cbegin(), data.cbegin() + len, actual.begin(), 130 actual.begin() + len, shift); 131 } 132 } 133 } 134 } 135 136 int 137 main() 138 { 139 test<int32_t, int8_t>(); 140 test<uint16_t, float32_t>(); 141 test<float64_t, int64_t>(); 142 test<wrapper<float64_t>, wrapper<float64_t>>(); 143 144 std::cout << done() << std::endl; 145 return 0; 146 } 147