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