1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // test <cstdlib> 10 11 #include <cstdlib> 12 #include <type_traits> 13 #include <cassert> 14 15 #include "test_macros.h" 16 17 // As of 1/10/2015 clang emits a -Wnonnull warnings even if the warning occurs 18 // in an unevaluated context. For this reason we manually suppress the warning. 19 #if defined(__clang__) 20 #pragma clang diagnostic ignored "-Wnonnull" 21 #endif 22 23 #ifndef EXIT_FAILURE 24 #error EXIT_FAILURE not defined 25 #endif 26 27 #ifndef EXIT_SUCCESS 28 #error EXIT_SUCCESS not defined 29 #endif 30 31 #ifndef MB_CUR_MAX 32 #error MB_CUR_MAX not defined 33 #endif 34 35 #ifndef NULL 36 #error NULL not defined 37 #endif 38 39 #ifndef RAND_MAX 40 #error RAND_MAX not defined 41 #endif 42 43 template <class TestType, class IntType> 44 void test_div_struct() { 45 TestType obj; 46 static_assert(sizeof(obj) >= sizeof(IntType) * 2, ""); // >= to account for alignment. 47 static_assert((std::is_same<decltype(obj.quot), IntType>::value), ""); 48 static_assert((std::is_same<decltype(obj.rem), IntType>::value), ""); 49 ((void) obj); 50 }; 51 52 template <class T, class = decltype(std::abs(std::declval<T>()))> 53 std::true_type has_abs_imp(int); 54 template <class T> 55 std::false_type has_abs_imp(...); 56 57 template <class T> 58 struct has_abs : decltype(has_abs_imp<T>(0)) {}; 59 60 void test_abs() { 61 #ifdef __clang__ 62 #pragma clang diagnostic push 63 #pragma clang diagnostic ignored "-Wabsolute-value" 64 #endif 65 static_assert((std::is_same<decltype(std::abs((float)0)), float>::value), ""); 66 static_assert((std::is_same<decltype(std::abs((double)0)), double>::value), ""); 67 static_assert( 68 (std::is_same<decltype(std::abs((long double)0)), long double>::value), ""); 69 static_assert((std::is_same<decltype(std::abs((int)0)), int>::value), ""); 70 static_assert((std::is_same<decltype(std::abs((long)0)), long>::value), ""); 71 static_assert((std::is_same<decltype(std::abs((long long)0)), long long>::value), 72 ""); 73 static_assert((std::is_same<decltype(std::abs((unsigned char)0)), int>::value), 74 ""); 75 static_assert((std::is_same<decltype(std::abs((unsigned short)0)), int>::value), 76 ""); 77 static_assert((std::is_same<decltype(std::abs((signed char)0)), int>::value), 78 ""); 79 static_assert((std::is_same<decltype(std::abs((short)0)), int>::value), 80 ""); 81 static_assert((std::is_same<decltype(std::abs((unsigned char)0)), int>::value), 82 ""); 83 static_assert((std::is_same<decltype(std::abs((char)0)), int>::value), 84 ""); 85 86 static_assert(!has_abs<unsigned>::value, ""); 87 static_assert(!has_abs<unsigned long>::value, ""); 88 static_assert(!has_abs<unsigned long long>::value, ""); 89 static_assert(!has_abs<size_t>::value, ""); 90 91 #ifdef __clang__ 92 #pragma clang diagnostic pop 93 #endif 94 95 assert(std::abs(-1.) == 1); 96 } 97 98 int main(int, char**) 99 { 100 std::size_t s = 0; 101 ((void)s); 102 static_assert((std::is_same<std::size_t, decltype(sizeof(int))>::value), ""); 103 test_div_struct<std::div_t, int>(); 104 test_div_struct<std::ldiv_t, long>(); 105 test_div_struct<std::lldiv_t, long long>(); 106 char** endptr = 0; 107 static_assert((std::is_same<decltype(std::atof("")), double>::value), ""); 108 static_assert((std::is_same<decltype(std::atoi("")), int>::value), ""); 109 static_assert((std::is_same<decltype(std::atol("")), long>::value), ""); 110 static_assert((std::is_same<decltype(std::atoll("")), long long>::value), ""); 111 static_assert((std::is_same<decltype(std::getenv("")), char*>::value), ""); 112 static_assert((std::is_same<decltype(std::strtod("", endptr)), double>::value), ""); 113 static_assert((std::is_same<decltype(std::strtof("", endptr)), float>::value), ""); 114 static_assert((std::is_same<decltype(std::strtold("", endptr)), long double>::value), ""); 115 static_assert((std::is_same<decltype(std::strtol("", endptr,0)), long>::value), ""); 116 static_assert((std::is_same<decltype(std::strtoll("", endptr,0)), long long>::value), ""); 117 static_assert((std::is_same<decltype(std::strtoul("", endptr,0)), unsigned long>::value), ""); 118 static_assert((std::is_same<decltype(std::strtoull("", endptr,0)), unsigned long long>::value), ""); 119 static_assert((std::is_same<decltype(std::rand()), int>::value), ""); 120 static_assert((std::is_same<decltype(std::srand(0)), void>::value), ""); 121 122 #if TEST_STD_VER > 14 && defined(TEST_HAS_ALIGNED_ALLOC) 123 static_assert( 124 (std::is_same<decltype(std::aligned_alloc(1, 0)), void*>::value), ""); 125 #endif 126 127 static_assert((std::is_same<decltype(std::calloc(0,0)), void*>::value), ""); 128 static_assert((std::is_same<decltype(std::free(0)), void>::value), ""); 129 static_assert((std::is_same<decltype(std::malloc(0)), void*>::value), ""); 130 static_assert((std::is_same<decltype(std::realloc(0,0)), void*>::value), ""); 131 static_assert((std::is_same<decltype(std::abort()), void>::value), ""); 132 static_assert((std::is_same<decltype(std::atexit(0)), int>::value), ""); 133 static_assert((std::is_same<decltype(std::exit(0)), void>::value), ""); 134 static_assert((std::is_same<decltype(std::_Exit(0)), void>::value), ""); 135 static_assert((std::is_same<decltype(std::getenv("")), char*>::value), ""); 136 static_assert((std::is_same<decltype(std::system("")), int>::value), ""); 137 static_assert((std::is_same<decltype(std::bsearch(0,0,0,0,0)), void*>::value), ""); 138 static_assert((std::is_same<decltype(std::qsort(0,0,0,0)), void>::value), ""); 139 static_assert((std::is_same<decltype(std::abs(0)), int>::value), ""); 140 static_assert((std::is_same<decltype(std::abs((long)0)), long>::value), ""); 141 static_assert((std::is_same<decltype(std::abs((long long)0)), long long>::value), ""); 142 static_assert((std::is_same<decltype(std::labs((long)0)), long>::value), ""); 143 static_assert((std::is_same<decltype(std::llabs((long long)0)), long long>::value), ""); 144 static_assert((std::is_same<decltype(std::div(0,0)), std::div_t>::value), ""); 145 static_assert((std::is_same<decltype(std::div(0L,0L)), std::ldiv_t>::value), ""); 146 static_assert((std::is_same<decltype(std::div(0LL,0LL)), std::lldiv_t>::value), ""); 147 static_assert((std::is_same<decltype(std::ldiv(0L,0L)), std::ldiv_t>::value), ""); 148 static_assert((std::is_same<decltype(std::lldiv(0LL,0LL)), std::lldiv_t>::value), ""); 149 wchar_t* pw = 0; 150 const wchar_t* pwc = 0; 151 char* pc = 0; 152 static_assert((std::is_same<decltype(std::mblen("",0)), int>::value), ""); 153 static_assert((std::is_same<decltype(std::mbtowc(pw,"",0)), int>::value), ""); 154 static_assert((std::is_same<decltype(std::wctomb(pc,L' ')), int>::value), ""); 155 static_assert((std::is_same<decltype(std::mbstowcs(pw,"",0)), std::size_t>::value), ""); 156 static_assert((std::is_same<decltype(std::wcstombs(pc,pwc,0)), std::size_t>::value), ""); 157 158 test_abs(); 159 160 return 0; 161 } 162