102 lines
3.1 KiB
C++
102 lines
3.1 KiB
C++
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/*=============================================================================
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Copyright (c) 2010 Bryce Lelbach
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#include <boost/config.hpp>
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#if defined(BOOST_NO_FENV_H)
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#error This platform does not have a floating point environment
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#endif
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#if !defined(BOOST_DETAIL_FENV_HPP)
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#define BOOST_DETAIL_FENV_HPP
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/* If we're using clang + glibc, we have to get hacky.
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* See http://llvm.org/bugs/show_bug.cgi?id=6907 */
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#if defined(__clang__) && (__clang_major__ < 3) && \
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defined(__GNU_LIBRARY__) && /* up to version 5 */ \
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defined(__GLIBC__) && /* version 6 + */ \
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!defined(_FENV_H)
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#define _FENV_H
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#include <features.h>
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#include <bits/fenv.h>
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extern "C" {
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extern int fegetexceptflag (fexcept_t*, int) __THROW;
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extern int fesetexceptflag (__const fexcept_t*, int) __THROW;
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extern int feclearexcept (int) __THROW;
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extern int feraiseexcept (int) __THROW;
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extern int fetestexcept (int) __THROW;
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extern int fegetround (void) __THROW;
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extern int fesetround (int) __THROW;
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extern int fegetenv (fenv_t*) __THROW;
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extern int fesetenv (__const fenv_t*) __THROW;
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extern int feupdateenv (__const fenv_t*) __THROW;
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extern int feholdexcept (fenv_t*) __THROW;
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#ifdef __USE_GNU
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extern int feenableexcept (int) __THROW;
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extern int fedisableexcept (int) __THROW;
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extern int fegetexcept (void) __THROW;
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#endif
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}
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namespace std { namespace tr1 {
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using ::fenv_t;
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using ::fexcept_t;
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using ::fegetexceptflag;
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using ::fesetexceptflag;
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using ::feclearexcept;
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using ::feraiseexcept;
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using ::fetestexcept;
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using ::fegetround;
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using ::fesetround;
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using ::fegetenv;
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using ::fesetenv;
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using ::feupdateenv;
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using ::feholdexcept;
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} }
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#elif defined(__MINGW32__) && defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) >= 408
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// MinGW (32-bit) has a bug in mingw32/bits/c++config.h, it does not define _GLIBCXX_HAVE_FENV_H,
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// which prevents the C fenv.h header contents to be included in the C++ wrapper header fenv.h. This is at least
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// the case with gcc 4.8.1 packages tested so far, up to 4.8.1-4. Note that there is no issue with
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// MinGW-w64.
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// To work around the bug we avoid including the C++ wrapper header and include the C header directly
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// and import all relevant symbols into std:: ourselves.
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#include <../include/fenv.h>
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namespace std {
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using ::fenv_t;
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using ::fexcept_t;
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using ::fegetexceptflag;
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using ::fesetexceptflag;
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using ::feclearexcept;
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using ::feraiseexcept;
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using ::fetestexcept;
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using ::fegetround;
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using ::fesetround;
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using ::fegetenv;
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using ::fesetenv;
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using ::feupdateenv;
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using ::feholdexcept;
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}
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#else /* if we're not using GNU's C stdlib, fenv.h should work with clang */
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#if defined(__SUNPRO_CC) /* lol suncc */
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#include <stdio.h>
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#endif
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#include <fenv.h>
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#endif
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#endif /* BOOST_DETAIL_FENV_HPP */
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