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      1 //===----------------------------------------------------------------------===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is dual licensed under the MIT and the University of Illinois Open
      6 // Source Licenses. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 
     10 // test <cstdlib>
     11 
     12 #include <cstdlib>
     13 #include <type_traits>
     14 #include <cassert>
     15 
     16 // As of 1/10/2015 clang emits a -Wnonnull warnings even if the warning occurs
     17 // in an unevaluated context. For this reason we manually suppress the warning.
     18 #if defined(__clang__)
     19 #pragma clang diagnostic ignored "-Wnonnull"
     20 #endif
     21 
     22 #ifndef EXIT_FAILURE
     23 #error EXIT_FAILURE not defined
     24 #endif
     25 
     26 #ifndef EXIT_SUCCESS
     27 #error EXIT_SUCCESS not defined
     28 #endif
     29 
     30 #ifndef MB_CUR_MAX
     31 #error MB_CUR_MAX not defined
     32 #endif
     33 
     34 #ifndef NULL
     35 #error NULL not defined
     36 #endif
     37 
     38 #ifndef RAND_MAX
     39 #error RAND_MAX not defined
     40 #endif
     41 
     42 template <class TestType, class IntType>
     43 void test_div_struct() {
     44     TestType obj;
     45     static_assert(sizeof(obj) >= sizeof(IntType) * 2, ""); // >= to account for alignment.
     46     static_assert((std::is_same<decltype(obj.quot), IntType>::value), "");
     47     static_assert((std::is_same<decltype(obj.rem), IntType>::value), "");
     48     ((void) obj);
     49 };
     50 
     51 int main()
     52 {
     53     std::size_t s = 0;
     54     ((void)s);
     55     static_assert((std::is_same<std::size_t, decltype(sizeof(int))>::value), "");
     56     test_div_struct<std::div_t, int>();
     57     test_div_struct<std::ldiv_t, long>();
     58     test_div_struct<std::lldiv_t, long long>();
     59     char** endptr = 0;
     60     static_assert((std::is_same<decltype(std::atof("")), double>::value), "");
     61     static_assert((std::is_same<decltype(std::atoi("")), int>::value), "");
     62     static_assert((std::is_same<decltype(std::atol("")), long>::value), "");
     63     static_assert((std::is_same<decltype(std::atoll("")), long long>::value), "");
     64     static_assert((std::is_same<decltype(std::getenv("")), char*>::value), "");
     65     static_assert((std::is_same<decltype(std::strtod("", endptr)), double>::value), "");
     66     static_assert((std::is_same<decltype(std::strtof("", endptr)), float>::value), "");
     67     static_assert((std::is_same<decltype(std::strtold("", endptr)), long double>::value), "");
     68     static_assert((std::is_same<decltype(std::strtol("", endptr,0)), long>::value), "");
     69     static_assert((std::is_same<decltype(std::strtoll("", endptr,0)), long long>::value), "");
     70     static_assert((std::is_same<decltype(std::strtoul("", endptr,0)), unsigned long>::value), "");
     71     static_assert((std::is_same<decltype(std::strtoull("", endptr,0)), unsigned long long>::value), "");
     72     static_assert((std::is_same<decltype(std::rand()), int>::value), "");
     73     static_assert((std::is_same<decltype(std::srand(0)), void>::value), "");
     74     static_assert((std::is_same<decltype(std::calloc(0,0)), void*>::value), "");
     75     static_assert((std::is_same<decltype(std::free(0)), void>::value), "");
     76     static_assert((std::is_same<decltype(std::malloc(0)), void*>::value), "");
     77     static_assert((std::is_same<decltype(std::realloc(0,0)), void*>::value), "");
     78     static_assert((std::is_same<decltype(std::abort()), void>::value), "");
     79     static_assert((std::is_same<decltype(std::atexit(0)), int>::value), "");
     80     static_assert((std::is_same<decltype(std::exit(0)), void>::value), "");
     81     static_assert((std::is_same<decltype(std::_Exit(0)), void>::value), "");
     82     static_assert((std::is_same<decltype(std::getenv("")), char*>::value), "");
     83     static_assert((std::is_same<decltype(std::system("")), int>::value), "");
     84     static_assert((std::is_same<decltype(std::bsearch(0,0,0,0,0)), void*>::value), "");
     85     static_assert((std::is_same<decltype(std::qsort(0,0,0,0)), void>::value), "");
     86     static_assert((std::is_same<decltype(std::abs(0)), int>::value), "");
     87     static_assert((std::is_same<decltype(std::abs((long)0)), long>::value), "");
     88     static_assert((std::is_same<decltype(std::abs((long long)0)), long long>::value), "");
     89     static_assert((std::is_same<decltype(std::labs((long)0)), long>::value), "");
     90     static_assert((std::is_same<decltype(std::llabs((long long)0)), long long>::value), "");
     91     static_assert((std::is_same<decltype(std::div(0,0)), std::div_t>::value), "");
     92     static_assert((std::is_same<decltype(std::div(0L,0L)), std::ldiv_t>::value), "");
     93     static_assert((std::is_same<decltype(std::div(0LL,0LL)), std::lldiv_t>::value), "");
     94     static_assert((std::is_same<decltype(std::ldiv(0L,0L)), std::ldiv_t>::value), "");
     95     static_assert((std::is_same<decltype(std::lldiv(0LL,0LL)), std::lldiv_t>::value), "");
     96     wchar_t* pw = 0;
     97     const wchar_t* pwc = 0;
     98     char* pc = 0;
     99     static_assert((std::is_same<decltype(std::mblen("",0)), int>::value), "");
    100     static_assert((std::is_same<decltype(std::mbtowc(pw,"",0)), int>::value), "");
    101     static_assert((std::is_same<decltype(std::wctomb(pc,L' ')), int>::value), "");
    102     static_assert((std::is_same<decltype(std::mbstowcs(pw,"",0)), std::size_t>::value), "");
    103     static_assert((std::is_same<decltype(std::wcstombs(pc,pwc,0)), std::size_t>::value), "");
    104 }
    105