| 1 | /*============================================================================= |
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| 2 | Copyright (c) 2010 Bryce Lelbach |
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| 3 | |
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| 4 | Distributed under the Boost Software License, Version 1.0. (See accompanying |
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| 5 | file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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| 6 | =============================================================================*/ |
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| 7 | |
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| 8 | #include <boost/config.hpp> |
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| 9 | |
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| 10 | #if defined(BOOST_NO_FENV_H) |
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| 11 | #error This platform does not have a floating point environment |
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| 12 | #endif |
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| 13 | |
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| 14 | #if !defined(BOOST_DETAIL_FENV_HPP) |
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| 15 | #define BOOST_DETAIL_FENV_HPP |
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| 16 | |
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| 17 | /* If we're using clang + glibc, we have to get hacky. |
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| 18 | * See http://llvm.org/bugs/show_bug.cgi?id=6907 */ |
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| 19 | #if defined(__clang__) && (__clang_major__ < 3) && \ |
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| 20 | defined(__GNU_LIBRARY__) && /* up to version 5 */ \ |
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| 21 | defined(__GLIBC__) && /* version 6 + */ \ |
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| 22 | !defined(_FENV_H) |
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| 23 | #define _FENV_H |
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| 24 | |
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| 25 | #include <features.h> |
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| 26 | #include <bits/fenv.h> |
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| 27 | |
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| 28 | extern "C" { |
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| 29 | extern int fegetexceptflag (fexcept_t*, int) __THROW; |
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| 30 | extern int fesetexceptflag (__const fexcept_t*, int) __THROW; |
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| 31 | extern int feclearexcept (int) __THROW; |
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| 32 | extern int feraiseexcept (int) __THROW; |
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| 33 | extern int fetestexcept (int) __THROW; |
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| 34 | extern int fegetround (void) __THROW; |
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| 35 | extern int fesetround (int) __THROW; |
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| 36 | extern int fegetenv (fenv_t*) __THROW; |
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| 37 | extern int fesetenv (__const fenv_t*) __THROW; |
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| 38 | extern int feupdateenv (__const fenv_t*) __THROW; |
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| 39 | extern int feholdexcept (fenv_t*) __THROW; |
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| 40 | |
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| 41 | #ifdef __USE_GNU |
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| 42 | extern int feenableexcept (int) __THROW; |
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| 43 | extern int fedisableexcept (int) __THROW; |
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| 44 | extern int fegetexcept (void) __THROW; |
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| 45 | #endif |
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| 46 | } |
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| 47 | |
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| 48 | namespace std { namespace tr1 { |
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| 49 | using ::fenv_t; |
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| 50 | using ::fexcept_t; |
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| 51 | using ::fegetexceptflag; |
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| 52 | using ::fesetexceptflag; |
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| 53 | using ::feclearexcept; |
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| 54 | using ::feraiseexcept; |
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| 55 | using ::fetestexcept; |
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| 56 | using ::fegetround; |
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| 57 | using ::fesetround; |
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| 58 | using ::fegetenv; |
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| 59 | using ::fesetenv; |
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| 60 | using ::feupdateenv; |
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| 61 | using ::feholdexcept; |
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| 62 | } } |
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| 63 | |
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| 64 | #elif defined(__MINGW32__) && defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) >= 408 |
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| 65 | |
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| 66 | // MinGW (32-bit) has a bug in mingw32/bits/c++config.h, it does not define _GLIBCXX_HAVE_FENV_H, |
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| 67 | // 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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| 68 | // 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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| 69 | // MinGW-w64. |
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| 70 | // To work around the bug we avoid including the C++ wrapper header and include the C header directly |
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| 71 | // and import all relevant symbols into std:: ourselves. |
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| 72 | |
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| 73 | #include <../include/fenv.h> |
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| 74 | |
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| 75 | namespace std { |
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| 76 | using ::fenv_t; |
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| 77 | using ::fexcept_t; |
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| 78 | using ::fegetexceptflag; |
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| 79 | using ::fesetexceptflag; |
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| 80 | using ::feclearexcept; |
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| 81 | using ::feraiseexcept; |
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| 82 | using ::fetestexcept; |
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| 83 | using ::fegetround; |
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| 84 | using ::fesetround; |
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| 85 | using ::fegetenv; |
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| 86 | using ::fesetenv; |
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| 87 | using ::feupdateenv; |
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| 88 | using ::feholdexcept; |
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| 89 | } |
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| 90 | |
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| 91 | #else /* if we're not using GNU's C stdlib, fenv.h should work with clang */ |
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| 92 | |
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| 93 | #if defined(__SUNPRO_CC) /* lol suncc */ |
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| 94 | #include <stdio.h> |
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| 95 | #endif |
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| 96 | |
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| 97 | #include <fenv.h> |
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| 98 | |
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| 99 | #endif |
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| 100 | |
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| 101 | #endif /* BOOST_DETAIL_FENV_HPP */ |
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| 102 | |
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