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//   exp(const complex<T>& x);
15
16#include <complex>
17#include <cassert>
18
19#include "../cases.h"
20
21template <class T>
22void
23test(const std::complex<T>& c, std::complex<T> x)
24{
25    assert(exp(c) == x);
26}
27
28template <class T>
29void
30test()
31{
32    test(std::complex<T>(0, 0), std::complex<T>(1, 0));
33}
34
35void test_edges()
36{
37    const unsigned N = sizeof(x) / sizeof(x[0]);
38    for (unsigned i = 0; i < N; ++i)
39    {
40        std::complex<double> r = exp(x[i]);
41        if (x[i].real() == 0 && x[i].imag() == 0)
42        {
43            assert(r.real() == 1.0);
44            assert(r.imag() == 0);
45            assert(std::signbit(x[i].imag()) == std::signbit(r.imag()));
46        }
47        else if (std::isfinite(x[i].real()) && std::isinf(x[i].imag()))
48        {
49            assert(std::isnan(r.real()));
50            assert(std::isnan(r.imag()));
51        }
52        else if (std::isfinite(x[i].real()) && std::isnan(x[i].imag()))
53        {
54            assert(std::isnan(r.real()));
55            assert(std::isnan(r.imag()));
56        }
57        else if (std::isinf(x[i].real()) && x[i].real() > 0 && x[i].imag() == 0)
58        {
59            assert(std::isinf(r.real()));
60            assert(r.real() > 0);
61            assert(r.imag() == 0);
62            assert(std::signbit(x[i].imag()) == std::signbit(r.imag()));
63        }
64        else if (std::isinf(x[i].real()) && x[i].real() < 0 && std::isinf(x[i].imag()))
65        {
66            assert(r.real() == 0);
67            assert(r.imag() == 0);
68        }
69        else if (std::isinf(x[i].real()) && x[i].real() > 0 && std::isinf(x[i].imag()))
70        {
71            assert(std::isinf(r.real()));
72            assert(std::isnan(r.imag()));
73        }
74        else if (std::isinf(x[i].real()) && x[i].real() < 0 && std::isnan(x[i].imag()))
75        {
76            assert(r.real() == 0);
77            assert(r.imag() == 0);
78        }
79        else if (std::isinf(x[i].real()) && x[i].real() > 0 && std::isnan(x[i].imag()))
80        {
81            assert(std::isinf(r.real()));
82            assert(std::isnan(r.imag()));
83        }
84        else if (std::isnan(x[i].real()) && x[i].imag() == 0)
85        {
86            assert(std::isnan(r.real()));
87            assert(r.imag() == 0);
88            assert(std::signbit(x[i].imag()) == std::signbit(r.imag()));
89        }
90        else if (std::isnan(x[i].real()) && x[i].imag() != 0)
91        {
92            assert(std::isnan(r.real()));
93            assert(std::isnan(r.imag()));
94        }
95        else if (std::isnan(x[i].real()) && std::isnan(x[i].imag()))
96        {
97            assert(std::isnan(r.real()));
98            assert(std::isnan(r.imag()));
99        }
100        else if (std::isfinite(x[i].imag()) && std::abs(x[i].imag()) <= 1)
101        {
102            assert(!std::signbit(r.real()));
103            assert(std::signbit(r.imag()) == std::signbit(x[i].imag()));
104        }
105    }
106}
107
108int main()
109{
110    test<float>();
111    test<double>();
112    test<long double>();
113    test_edges();
114}
115