f5256e16df
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@103516 91177308-0d34-0410-b5e6-96231b3b80d8
141 lines
4.4 KiB
C++
141 lines
4.4 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <complex>
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// template<class T>
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// complex<T>
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// acos(const complex<T>& x);
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#include <complex>
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#include <cassert>
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#include "../cases.h"
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template <class T>
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void
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test(const std::complex<T>& c, std::complex<T> x)
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{
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assert(acos(c) == x);
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}
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template <class T>
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void
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test()
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{
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test(std::complex<T>(INFINITY, 1), std::complex<T>(0, -INFINITY));
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}
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void test_edges()
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{
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typedef std::complex<double> C;
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const double pi = std::atan2(+0., -0.);
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const unsigned N = sizeof(x) / sizeof(x[0]);
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for (unsigned i = 0; i < N; ++i)
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{
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std::complex<double> r = acos(x[i]);
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if (x[i].real() == 0 && x[i].imag() == 0)
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{
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is_about(r.real(), pi/2);
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assert(r.imag() == 0);
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assert(std::signbit(x[i].imag()) != std::signbit(r.imag()));
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}
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else if (x[i].real() == 0 && std::isnan(x[i].imag()))
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{
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is_about(r.real(), pi/2);
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assert(std::isnan(r.imag()));
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}
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else if (std::isfinite(x[i].real()) && std::isinf(x[i].imag()))
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{
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is_about(r.real(), pi/2);
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assert(std::isinf(r.imag()));
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assert(std::signbit(x[i].imag()) != std::signbit(r.imag()));
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}
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else if (std::isfinite(x[i].real()) && x[i].real() != 0 && std::isnan(x[i].imag()))
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{
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assert(std::isnan(r.real()));
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assert(std::isnan(r.imag()));
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}
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else if (std::isinf(x[i].real()) && x[i].real() < 0 && std::isfinite(x[i].imag()))
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{
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is_about(r.real(), pi);
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assert(std::isinf(r.imag()));
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assert(std::signbit(x[i].imag()) != std::signbit(r.imag()));
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}
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else if (std::isinf(x[i].real()) && x[i].real() > 0 && std::isfinite(x[i].imag()))
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{
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assert(r.real() == 0);
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assert(!std::signbit(r.real()));
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assert(std::isinf(r.imag()));
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assert(std::signbit(x[i].imag()) != std::signbit(r.imag()));
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}
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else if (std::isinf(x[i].real()) && x[i].real() < 0 && std::isinf(x[i].imag()))
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{
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is_about(r.real(), 0.75 * pi);
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assert(std::isinf(r.imag()));
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assert(std::signbit(x[i].imag()) != std::signbit(r.imag()));
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}
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else if (std::isinf(x[i].real()) && x[i].real() > 0 && std::isinf(x[i].imag()))
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{
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is_about(r.real(), 0.25 * pi);
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assert(std::isinf(r.imag()));
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assert(std::signbit(x[i].imag()) != std::signbit(r.imag()));
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}
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else if (std::isinf(x[i].real()) && std::isnan(x[i].imag()))
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{
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assert(std::isnan(r.real()));
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assert(std::isinf(r.imag()));
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}
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else if (std::isnan(x[i].real()) && std::isfinite(x[i].imag()))
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{
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assert(std::isnan(r.real()));
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assert(std::isnan(r.imag()));
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}
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else if (std::isnan(x[i].real()) && std::isinf(x[i].imag()))
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{
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assert(std::isnan(r.real()));
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assert(std::isinf(r.imag()));
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assert(std::signbit(x[i].imag()) != std::signbit(r.imag()));
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}
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else if (std::isnan(x[i].real()) && std::isnan(x[i].imag()))
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{
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assert(std::isnan(r.real()));
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assert(std::isnan(r.imag()));
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}
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else if (!std::signbit(x[i].real()) && !std::signbit(x[i].imag()))
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{
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assert(!std::signbit(r.real()));
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assert( std::signbit(r.imag()));
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}
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else if (std::signbit(x[i].real()) && !std::signbit(x[i].imag()))
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{
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assert(!std::signbit(r.real()));
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assert( std::signbit(r.imag()));
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}
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else if (std::signbit(x[i].real()) && std::signbit(x[i].imag()))
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{
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assert(!std::signbit(r.real()));
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assert(!std::signbit(r.imag()));
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}
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else if (!std::signbit(x[i].real()) && std::signbit(x[i].imag()))
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{
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assert(!std::signbit(r.real()));
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assert(!std::signbit(r.imag()));
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}
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}
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}
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int main()
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{
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test<float>();
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test<double>();
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test<long double>();
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test_edges();
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}
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