diff options
Diffstat (limited to 'contrib/llvm/tools/clang/lib/Headers/stdint.h')
| -rw-r--r-- | contrib/llvm/tools/clang/lib/Headers/stdint.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/contrib/llvm/tools/clang/lib/Headers/stdint.h b/contrib/llvm/tools/clang/lib/Headers/stdint.h index 6f1a876..11529c0 100644 --- a/contrib/llvm/tools/clang/lib/Headers/stdint.h +++ b/contrib/llvm/tools/clang/lib/Headers/stdint.h @@ -30,7 +30,48 @@ */ #if __STDC_HOSTED__ && \ defined(__has_include_next) && __has_include_next(<stdint.h>) + +// C99 7.18.3 Limits of other integer types +// +// Footnote 219, 220: C++ implementations should define these macros only when +// __STDC_LIMIT_MACROS is defined before <stdint.h> is included. +// +// Footnote 222: C++ implementations should define these macros only when +// __STDC_CONSTANT_MACROS is defined before <stdint.h> is included. +// +// C++11 [cstdint.syn]p2: +// +// The macros defined by <cstdint> are provided unconditionally. In particular, +// the symbols __STDC_LIMIT_MACROS and __STDC_CONSTANT_MACROS (mentioned in +// footnotes 219, 220, and 222 in the C standard) play no role in C++. +// +// C11 removed the problematic footnotes. +// +// Work around this inconsistency by always defining those macros in C++ mode, +// so that a C library implementation which follows the C99 standard can be +// used in C++. +# ifdef __cplusplus +# if !defined(__STDC_LIMIT_MACROS) +# define __STDC_LIMIT_MACROS +# define __STDC_LIMIT_MACROS_DEFINED_BY_CLANG +# endif +# if !defined(__STDC_CONSTANT_MACROS) +# define __STDC_CONSTANT_MACROS +# define __STDC_CONSTANT_MACROS_DEFINED_BY_CLANG +# endif +# endif + # include_next <stdint.h> + +# ifdef __STDC_LIMIT_MACROS_DEFINED_BY_CLANG +# undef __STDC_LIMIT_MACROS +# undef __STDC_LIMIT_MACROS_DEFINED_BY_CLANG +# endif +# ifdef __STDC_CONSTANT_MACROS_DEFINED_BY_CLANG +# undef __STDC_CONSTANT_MACROS +# undef __STDC_CONSTANT_MACROS_DEFINED_BY_CLANG +# endif + #else /* C99 7.18.1.1 Exact-width integer types. @@ -626,6 +667,12 @@ typedef __UINTMAX_TYPE__ uintmax_t; #define PTRDIFF_MAX __INTN_MAX(__PTRDIFF_WIDTH__) #define SIZE_MAX __UINTN_MAX(__SIZE_WIDTH__) +/* ISO9899:2011 7.20 (C11 Annex K): Define RSIZE_MAX if __STDC_WANT_LIB_EXT1__ + * is enabled. */ +#if defined(__STDC_WANT_LIB_EXT1__) && __STDC_WANT_LIB_EXT1__ >= 1 +#define RSIZE_MAX (SIZE_MAX >> 1) +#endif + /* C99 7.18.2.5 Limits of greatest-width integer types. */ #define INTMAX_MIN __INTN_MIN(__INTMAX_WIDTH__) #define INTMAX_MAX __INTN_MAX(__INTMAX_WIDTH__) |
