Chris@16: /*=============================================================================
Chris@16:     Copyright (c) 2010      Bryce Lelbach
Chris@16: 
Chris@16:     Distributed under the Boost Software License, Version 1.0. (See accompanying
Chris@16:     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: =============================================================================*/
Chris@16: 
Chris@16: #include <boost/config.hpp>
Chris@16: 
Chris@16: #if defined(BOOST_NO_FENV_H)
Chris@16:   #error This platform does not have a floating point environment
Chris@16: #endif
Chris@16: 
Chris@16: #if !defined(BOOST_DETAIL_FENV_HPP)
Chris@16: #define BOOST_DETAIL_FENV_HPP
Chris@16: 
Chris@101: /* If we're using clang + glibc, we have to get hacky.
Chris@16:  * See http://llvm.org/bugs/show_bug.cgi?id=6907 */
Chris@16: #if defined(__clang__)       &&  (__clang_major__ < 3) &&    \
Chris@16:     defined(__GNU_LIBRARY__) && /* up to version 5 */ \
Chris@16:     defined(__GLIBC__) &&         /* version 6 + */ \
Chris@16:     !defined(_FENV_H)
Chris@16:   #define _FENV_H
Chris@16: 
Chris@16:   #include <features.h>
Chris@16:   #include <bits/fenv.h>
Chris@16: 
Chris@16:   extern "C" {
Chris@16:     extern int fegetexceptflag (fexcept_t*, int) __THROW;
Chris@16:     extern int fesetexceptflag (__const fexcept_t*, int) __THROW;
Chris@16:     extern int feclearexcept (int) __THROW;
Chris@16:     extern int feraiseexcept (int) __THROW;
Chris@16:     extern int fetestexcept (int) __THROW;
Chris@16:     extern int fegetround (void) __THROW;
Chris@16:     extern int fesetround (int) __THROW;
Chris@16:     extern int fegetenv (fenv_t*) __THROW;
Chris@16:     extern int fesetenv (__const fenv_t*) __THROW;
Chris@16:     extern int feupdateenv (__const fenv_t*) __THROW;
Chris@16:     extern int feholdexcept (fenv_t*) __THROW;
Chris@16: 
Chris@16:     #ifdef __USE_GNU
Chris@16:       extern int feenableexcept (int) __THROW;
Chris@16:       extern int fedisableexcept (int) __THROW;
Chris@16:       extern int fegetexcept (void) __THROW;
Chris@16:     #endif
Chris@16:   }
Chris@16: 
Chris@16:   namespace std { namespace tr1 {
Chris@16:     using ::fenv_t;
Chris@16:     using ::fexcept_t;
Chris@16:     using ::fegetexceptflag;
Chris@16:     using ::fesetexceptflag;
Chris@16:     using ::feclearexcept;
Chris@16:     using ::feraiseexcept;
Chris@16:     using ::fetestexcept;
Chris@16:     using ::fegetround;
Chris@16:     using ::fesetround;
Chris@16:     using ::fegetenv;
Chris@16:     using ::fesetenv;
Chris@16:     using ::feupdateenv;
Chris@16:     using ::feholdexcept;
Chris@16:   } }
Chris@16: 
Chris@101: #elif defined(__MINGW32__) && defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) >= 408
Chris@101: 
Chris@101:   // MinGW (32-bit) has a bug in mingw32/bits/c++config.h, it does not define _GLIBCXX_HAVE_FENV_H,
Chris@101:   // which prevents the C fenv.h header contents to be included in the C++ wrapper header fenv.h. This is at least
Chris@101:   // the case with gcc 4.8.1 packages tested so far, up to 4.8.1-4. Note that there is no issue with
Chris@101:   // MinGW-w64.
Chris@101:   // To work around the bug we avoid including the C++ wrapper header and include the C header directly
Chris@101:   // and import all relevant symbols into std:: ourselves.
Chris@101: 
Chris@101:   #include <../include/fenv.h>
Chris@101: 
Chris@101:   namespace std {
Chris@101:     using ::fenv_t;
Chris@101:     using ::fexcept_t;
Chris@101:     using ::fegetexceptflag;
Chris@101:     using ::fesetexceptflag;
Chris@101:     using ::feclearexcept;
Chris@101:     using ::feraiseexcept;
Chris@101:     using ::fetestexcept;
Chris@101:     using ::fegetround;
Chris@101:     using ::fesetround;
Chris@101:     using ::fegetenv;
Chris@101:     using ::fesetenv;
Chris@101:     using ::feupdateenv;
Chris@101:     using ::feholdexcept;
Chris@101:   }
Chris@101: 
Chris@16: #else /* if we're not using GNU's C stdlib, fenv.h should work with clang */
Chris@101: 
Chris@16:   #if defined(__SUNPRO_CC) /* lol suncc */
Chris@16:     #include <stdio.h>
Chris@16:   #endif
Chris@101: 
Chris@16:   #include <fenv.h>
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16: #endif /* BOOST_DETAIL_FENV_HPP */