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 <stdlib.h> 10 11 #include <stdlib.h> 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 #ifdef abs 24 #error abs is defined 25 #endif 26 27 #ifdef labs 28 #error labs is defined 29 #endif 30 31 #ifdef llabs 32 #error llabs is defined 33 #endif 34 35 #ifdef div 36 #error div is defined 37 #endif 38 39 #ifdef ldiv 40 #error ldiv is defined 41 #endif 42 43 #ifdef lldiv 44 #error lldiv is defined 45 #endif 46 47 #ifndef EXIT_FAILURE 48 #error EXIT_FAILURE not defined 49 #endif 50 51 #ifndef EXIT_SUCCESS 52 #error EXIT_SUCCESS not defined 53 #endif 54 55 #ifndef MB_CUR_MAX 56 #error MB_CUR_MAX not defined 57 #endif 58 59 #ifndef NULL 60 #error NULL not defined 61 #endif 62 63 #ifndef RAND_MAX 64 #error RAND_MAX not defined 65 #endif 66 67 template <class T, class = decltype(::abs(std::declval<T>()))> 68 std::true_type has_abs_imp(int); 69 template <class T> 70 std::false_type has_abs_imp(...); 71 72 template <class T> 73 struct has_abs : decltype(has_abs_imp<T>(0)) {}; 74 75 void test_abs() { 76 #ifdef __clang__ 77 #pragma clang diagnostic push 78 #pragma clang diagnostic ignored "-Wabsolute-value" 79 #endif 80 static_assert((std::is_same<decltype(abs((float)0)), float>::value), ""); 81 static_assert((std::is_same<decltype(abs((double)0)), double>::value), ""); 82 static_assert( 83 (std::is_same<decltype(abs((long double)0)), long double>::value), ""); 84 static_assert((std::is_same<decltype(abs((int)0)), int>::value), ""); 85 static_assert((std::is_same<decltype(abs((long)0)), long>::value), ""); 86 static_assert((std::is_same<decltype(abs((long long)0)), long long>::value), 87 ""); 88 static_assert((std::is_same<decltype(abs((unsigned char)0)), int>::value), 89 ""); 90 static_assert((std::is_same<decltype(abs((unsigned short)0)), int>::value), 91 ""); 92 static_assert((std::is_same<decltype(abs((signed char)0)), int>::value), 93 ""); 94 static_assert((std::is_same<decltype(abs((short)0)), int>::value), 95 ""); 96 static_assert((std::is_same<decltype(abs((unsigned char)0)), int>::value), 97 ""); 98 static_assert((std::is_same<decltype(abs((char)0)), int>::value), 99 ""); 100 101 static_assert(!has_abs<unsigned>::value, ""); 102 static_assert(!has_abs<unsigned long>::value, ""); 103 static_assert(!has_abs<unsigned long long>::value, ""); 104 static_assert(!has_abs<size_t>::value, ""); 105 106 #ifdef __clang__ 107 #pragma clang diagnostic pop 108 #endif 109 110 assert(abs(-1.) == 1); 111 } 112 113 int main(int, char**) 114 { 115 size_t s = 0; ((void)s); 116 div_t d; ((void)d); 117 ldiv_t ld; ((void)ld); 118 lldiv_t lld; ((void)lld); 119 char** endptr = 0; 120 static_assert((std::is_same<decltype(atof("")), double>::value), ""); 121 static_assert((std::is_same<decltype(atoi("")), int>::value), ""); 122 static_assert((std::is_same<decltype(atol("")), long>::value), ""); 123 static_assert((std::is_same<decltype(atoll("")), long long>::value), ""); 124 static_assert((std::is_same<decltype(getenv("")), char*>::value), ""); 125 static_assert((std::is_same<decltype(strtod("", endptr)), double>::value), ""); 126 static_assert((std::is_same<decltype(strtof("", endptr)), float>::value), ""); 127 static_assert((std::is_same<decltype(strtold("", endptr)), long double>::value), ""); 128 static_assert((std::is_same<decltype(strtol("", endptr,0)), long>::value), ""); 129 static_assert((std::is_same<decltype(strtoll("", endptr,0)), long long>::value), ""); 130 static_assert((std::is_same<decltype(strtoul("", endptr,0)), unsigned long>::value), ""); 131 static_assert((std::is_same<decltype(strtoull("", endptr,0)), unsigned long long>::value), ""); 132 static_assert((std::is_same<decltype(rand()), int>::value), ""); 133 static_assert((std::is_same<decltype(srand(0)), void>::value), ""); 134 135 // aligned_alloc tested in stdlib_h.aligned_alloc.compile.pass.cpp 136 137 void* pv = 0; 138 void (*handler)() = 0; 139 int (*comp)(void const*, void const*) = 0; 140 static_assert((std::is_same<decltype(calloc(0,0)), void*>::value), ""); 141 static_assert((std::is_same<decltype(free(0)), void>::value), ""); 142 static_assert((std::is_same<decltype(malloc(0)), void*>::value), ""); 143 static_assert((std::is_same<decltype(realloc(0,0)), void*>::value), ""); 144 static_assert((std::is_same<decltype(abort()), void>::value), ""); 145 static_assert((std::is_same<decltype(atexit(handler)), int>::value), ""); 146 static_assert((std::is_same<decltype(exit(0)), void>::value), ""); 147 static_assert((std::is_same<decltype(_Exit(0)), void>::value), ""); 148 static_assert((std::is_same<decltype(getenv("")), char*>::value), ""); 149 static_assert((std::is_same<decltype(system("")), int>::value), ""); 150 static_assert((std::is_same<decltype(bsearch(pv,pv,0,0,comp)), void*>::value), ""); 151 static_assert((std::is_same<decltype(qsort(pv,0,0,comp)), void>::value), ""); 152 static_assert((std::is_same<decltype(abs(0)), int>::value), ""); 153 static_assert((std::is_same<decltype(labs((long)0)), long>::value), ""); 154 static_assert((std::is_same<decltype(llabs((long long)0)), long long>::value), ""); 155 static_assert((std::is_same<decltype(div(0,0)), div_t>::value), ""); 156 static_assert((std::is_same<decltype(ldiv(0L,0L)), ldiv_t>::value), ""); 157 static_assert((std::is_same<decltype(lldiv(0LL,0LL)), lldiv_t>::value), ""); 158 wchar_t* pw = 0; 159 const wchar_t* pwc = 0; 160 char* pc = 0; 161 static_assert((std::is_same<decltype(mblen("",0)), int>::value), ""); 162 static_assert((std::is_same<decltype(mbtowc(pw,"",0)), int>::value), ""); 163 static_assert((std::is_same<decltype(wctomb(pc,L' ')), int>::value), ""); 164 static_assert((std::is_same<decltype(mbstowcs(pw,"",0)), size_t>::value), ""); 165 static_assert((std::is_same<decltype(wcstombs(pc,pwc,0)), size_t>::value), ""); 166 167 test_abs(); 168 169 return 0; 170 } 171