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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 // <complex>
     11 
     12 // template<class T>
     13 //   complex<T>
     14 //   cosh(const complex<T>& x);
     15 
     16 #include <complex>
     17 #include <cassert>
     18 
     19 #include "../cases.h"
     20 
     21 template <class T>
     22 void
     23 test(const std::complex<T>& c, std::complex<T> x)
     24 {
     25     assert(cosh(c) == x);
     26 }
     27 
     28 template <class T>
     29 void
     30 test()
     31 {
     32     test(std::complex<T>(0, 0), std::complex<T>(1, 0));
     33 }
     34 
     35 void test_edges()
     36 {
     37     const unsigned N = sizeof(testcases) / sizeof(testcases[0]);
     38     for (unsigned i = 0; i < N; ++i)
     39     {
     40         std::complex<double> r = cosh(testcases[i]);
     41         if (testcases[i].real() == 0 && testcases[i].imag() == 0)
     42         {
     43             assert(r.real() == 1);
     44             assert(r.imag() == 0);
     45             assert(std::signbit(r.imag()) == std::signbit(testcases[i].imag()));
     46         }
     47         else if (testcases[i].real() == 0 && std::isinf(testcases[i].imag()))
     48         {
     49             assert(std::isnan(r.real()));
     50             assert(r.imag() == 0);
     51         }
     52         else if (testcases[i].real() == 0 && std::isnan(testcases[i].imag()))
     53         {
     54             assert(std::isnan(r.real()));
     55             assert(r.imag() == 0);
     56         }
     57         else if (std::isfinite(testcases[i].real()) && std::isinf(testcases[i].imag()))
     58         {
     59             assert(std::isnan(r.real()));
     60             assert(std::isnan(r.imag()));
     61         }
     62         else if (std::isfinite(testcases[i].real()) && std::isnan(testcases[i].imag()))
     63         {
     64             assert(std::isnan(r.real()));
     65             assert(std::isnan(r.imag()));
     66         }
     67         else if (std::isinf(testcases[i].real()) && testcases[i].imag() == 0)
     68         {
     69             assert(std::isinf(r.real()));
     70             assert(!std::signbit(r.real()));
     71             assert(r.imag() == 0);
     72             assert(std::signbit(r.imag()) == std::signbit(testcases[i].imag()));
     73         }
     74         else if (std::isinf(testcases[i].real()) && std::isfinite(testcases[i].imag()))
     75         {
     76             assert(std::isinf(r.real()));
     77             assert(std::signbit(r.real()) == std::signbit(cos(testcases[i].imag())));
     78             assert(std::isinf(r.imag()));
     79             assert(std::signbit(r.imag()) == std::signbit(testcases[i].real() * sin(testcases[i].imag())));
     80         }
     81         else if (std::isinf(testcases[i].real()) && std::isinf(testcases[i].imag()))
     82         {
     83             assert(std::isinf(r.real()));
     84             assert(std::isnan(r.imag()));
     85         }
     86         else if (std::isinf(testcases[i].real()) && std::isnan(testcases[i].imag()))
     87         {
     88             assert(std::isinf(r.real()));
     89             assert(r.real() > 0);
     90             assert(std::isnan(r.imag()));
     91         }
     92         else if (std::isnan(testcases[i].real()) && testcases[i].imag() == 0)
     93         {
     94             assert(std::isnan(r.real()));
     95             assert(r.imag() == 0);
     96         }
     97         else if (std::isnan(testcases[i].real()) && std::isfinite(testcases[i].imag()))
     98         {
     99             assert(std::isnan(r.real()));
    100             assert(std::isnan(r.imag()));
    101         }
    102         else if (std::isnan(testcases[i].real()) && std::isnan(testcases[i].imag()))
    103         {
    104             assert(std::isnan(r.real()));
    105             assert(std::isnan(r.imag()));
    106         }
    107     }
    108 }
    109 
    110 int main()
    111 {
    112     test<float>();
    113     test<double>();
    114     test<long double>();
    115     test_edges();
    116 }
    117