libcxx/test/std/numerics/complex.number/complex.transcendentals/cosh.pass.cpp

   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 // <complex>
  10
  11 // template<class T>
  12 //   complex<T>
  13 //   cosh(const complex<T>& x);
  14
  15 #include <complex>
  16 #include <cassert>
  17
  18 #include "test_macros.h"
  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(int, char**)
 111 {
 112     test<float>();
 113     test<double>();
 114     test<long double>();
 115     test_edges();
 116
 117   return 0;
 118 }