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// log10(const complex<T>& x);
14
15#include <complex>
16#include <cassert>
17
18#include "test_macros.h"
19#include "../cases.h"
20
21template <class T>
22void
23test(const std::complex<T>& c, std::complex<T> x)
24{
25 assert(log10(c) == x);
26}
27
28template <class T>
29void
30test()
31{
32 test(std::complex<T>(0, 0), std::complex<T>(-INFINITY, 0));
33}
34
35void 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 = log10(testcases[i]);
41 std::complex<double> z = log(testcases[i])/std::log(10);
42 if (std::isnan(x: real(z: r)))
43 assert(std::isnan(real(z)));
44 else
45 {
46 assert(real(r) == real(z));
47 assert(std::signbit(real(r)) == std::signbit(real(z)));
48 }
49 if (std::isnan(x: imag(z: r)))
50 assert(std::isnan(imag(z)));
51 else
52 {
53 assert(imag(r) == imag(z));
54 assert(std::signbit(imag(r)) == std::signbit(imag(z)));
55 }
56 }
57}
58
59int main(int, char**)
60{
61 test<float>();
62 test<double>();
63 test<long double>();
64 test_edges();
65
66 return 0;
67}
68

source code of libcxx/test/std/numerics/complex.number/complex.transcendentals/log10.pass.cpp