libcxx/test/std/numerics/complex.number/complex.transcendentals/tanh.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 //   tanh(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(tanh(c) == x);
  26 }
  27
  28 template <class T>
  29 void
  30 test()
  31 {
  32     test(std::complex<T>(0, 0), std::complex<T>(0, 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 = tanh(testcases[i]);
  41         if (testcases[i].real() == 0 && testcases[i].imag() == 0)
  42         {
  43             assert(r.real() == 0);
  44             assert(std::signbit(r.real()) == std::signbit(testcases[i].real()));
  45             assert(r.imag() == 0);
  46             assert(std::signbit(r.imag()) == std::signbit(testcases[i].imag()));
  47         }
  48         else if (std::isfinite(testcases[i].real()) && std::isinf(testcases[i].imag()))
  49         {
  50             assert(std::isnan(r.real()));
  51             assert(std::isnan(r.imag()));
  52         }
  53         else if (std::isfinite(testcases[i].real()) && std::isnan(testcases[i].imag()))
  54         {
  55             assert(std::isnan(r.real()));
  56             assert(std::isnan(r.imag()));
  57         }
  58         else if (std::isinf(testcases[i].real()) && std::isfinite(testcases[i].imag()))
  59         {
  60             assert(r.real() == (testcases[i].real() > 0 ? 1 : -1));
  61             assert(r.imag() == 0);
  62             assert(std::signbit(r.imag()) == std::signbit(sin(2 * testcases[i].imag())));
  63         }
  64         else if (std::isinf(testcases[i].real()) && std::isinf(testcases[i].imag()))
  65         {
  66             assert(r.real() == (testcases[i].real() > 0 ? 1 : -1));
  67             assert(r.imag() == 0);
  68         }
  69         else if (std::isinf(testcases[i].real()) && std::isnan(testcases[i].imag()))
  70         {
  71             assert(r.real() == (testcases[i].real() > 0 ? 1 : -1));
  72             assert(r.imag() == 0);
  73         }
  74         else if (std::isnan(testcases[i].real()) && testcases[i].imag() == 0)
  75         {
  76             assert(std::isnan(r.real()));
  77             assert(r.imag() == 0);
  78             assert(std::signbit(r.imag()) == std::signbit(testcases[i].imag()));
  79         }
  80         else if (std::isnan(testcases[i].real()) && std::isfinite(testcases[i].imag()))
  81         {
  82             assert(std::isnan(r.real()));
  83             assert(std::isnan(r.imag()));
  84         }
  85         else if (std::isnan(testcases[i].real()) && std::isnan(testcases[i].imag()))
  86         {
  87             assert(std::isnan(r.real()));
  88             assert(std::isnan(r.imag()));
  89         }
  90     }
  91 }
  92
  93 int main(int, char**)
  94 {
  95     test<float>();
  96     test<double>();
  97     test<long double>();
  98     test_edges();
  99
 100   return 0;
 101 }