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