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59 lines
1.5 KiB
C++
59 lines
1.5 KiB
C++
// (C) Copyright John Maddock 2001.
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// (C) Copyright Bryce Lelbach 2010.
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// Use, modification and distribution are subject to the
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// Boost Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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// See http://www.boost.org/libs/config for most recent version.
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// MACRO: BOOST_NO_FENV_H
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// TITLE: fenv.h
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// DESCRIPTION: There is no standard <fenv.h> available. If <fenv.h> is
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// available, <boost/detail/fenv.hpp> should be included
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// instead of directly including <fenv.h>.
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#include <fenv.h>
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namespace boost_no_fenv_h {
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int test()
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{
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/// C++0x required typedefs
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typedef ::fenv_t has_fenv_t;
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typedef ::fexcept_t has_fexcept_t;
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/// C++0x required macros
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#if !defined(FE_DIVBYZERO)
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#error platform does not define FE_DIVBYZERO
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#endif
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#if !defined(FE_INEXACT)
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#error platform does not define FE_INEXACT
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#endif
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#if !defined(FE_ALL_EXCEPT)
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#error platform does not define FE_ALL_EXCEPT
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#endif
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int i;
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has_fexcept_t fe;
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has_fenv_t env;
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i = feclearexcept(FE_ALL_EXCEPT);
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i += fetestexcept(FE_ALL_EXCEPT); // All flags should be zero
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i += fegetexceptflag(&fe, FE_ALL_EXCEPT);
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i += fesetexceptflag(&fe, FE_ALL_EXCEPT);
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i += feraiseexcept(0);
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i += fesetround(fegetround());
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i += fegetenv(&env);
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i += fesetenv(&env);
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i += feholdexcept(&env);
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if(i)
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i += feupdateenv(&env);
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return i;
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}
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}
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