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Change code to check individually for the INT#_C macros before defining them - this correctly handles cases where they are partially defined by other other headers (for example ICU).

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Also declare this a gcc system header - seems to be the only way to really suppress the warnings - fixes #3889.

[SVN r59430]
This commit is contained in:
John Maddock
2010-02-02 18:35:33 +00:00
parent 6293af825a
commit 2f13159023
1 changed files with 37 additions and 8 deletions
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45
include/boost/cstdint.hpp
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@ -366,62 +366,91 @@ INT#_C macros if they're not already defined (John Maddock).
******************************************************/
#if !defined(BOOST__STDC_CONSTANT_MACROS_DEFINED) && !defined(INT8_C)
#if !defined(BOOST__STDC_CONSTANT_MACROS_DEFINED) && \
(!defined(INT8_C) || !defined(INT16_C) || !defined(INT32_C) || !defined(INT64_C))
//
// For the following code we get several warnings along the lines of:
//
// boost/cstdint.hpp:428:35: error: use of C99 long long integer constant
//
// So we declare this a system header to suppress these warnings.
//
#if defined(__GNUC__) && (__GNUC__ >= 4)
#pragma GCC system_header
#endif
#include <limits.h>
# define BOOST__STDC_CONSTANT_MACROS_DEFINED
# if defined(BOOST_HAS_MS_INT64)
//
// Borland/Intel/Microsoft compilers have width specific suffixes:
//
#ifndef INT8_C
# define INT8_C(value) value##i8
#endif
#ifndef INT16_C
# define INT16_C(value) value##i16
#endif
#ifndef INT32_C
# define INT32_C(value) value##i32
#endif
#ifndef INT64_C
# define INT64_C(value) value##i64
#endif
# ifdef __BORLANDC__
// Borland bug: appending ui8 makes the type a signed char
# define UINT8_C(value) static_cast<unsigned char>(value##u)
# else
# define UINT8_C(value) value##ui8
# endif
#ifndef UINT16_C
# define UINT16_C(value) value##ui16
#endif
#ifndef UINT32_C
# define UINT32_C(value) value##ui32
#endif
#ifndef UINT64_C
# define UINT64_C(value) value##ui64
#endif
#ifndef INTMAX_C
# define INTMAX_C(value) value##i64
# define UINTMAX_C(value) value##ui64
#endif
# else
// do it the old fashioned way:
// 8-bit types ------------------------------------------------------------//
# if UCHAR_MAX == 0xff
# if (UCHAR_MAX == 0xff) && !defined(INT8_C)
# define INT8_C(value) static_cast<boost::int8_t>(value)
# define UINT8_C(value) static_cast<boost::uint8_t>(value##u)
# endif
// 16-bit types -----------------------------------------------------------//
# if USHRT_MAX == 0xffff
# if (USHRT_MAX == 0xffff) && !defined(INT16_C)
# define INT16_C(value) static_cast<boost::int16_t>(value)
# define UINT16_C(value) static_cast<boost::uint16_t>(value##u)
# endif
// 32-bit types -----------------------------------------------------------//
# if UINT_MAX == 0xffffffff
#ifndef INT32_C
# if (UINT_MAX == 0xffffffff)
# define INT32_C(value) value
# define UINT32_C(value) value##u
# elif ULONG_MAX == 0xffffffff
# define INT32_C(value) value##L
# define UINT32_C(value) value##uL
# endif
#endif
// 64-bit types + intmax_t and uintmax_t ----------------------------------//
#ifndef INT64_C
# if defined(BOOST_HAS_LONG_LONG) && \
(defined(ULLONG_MAX) || defined(ULONG_LONG_MAX) || defined(ULONGLONG_MAX) || defined(_LLONG_MAX))
# if defined(__hpux) || defined(__APPLE__)
# if defined(__hpux)
// HP-UX's value of ULONG_LONG_MAX is unusable in preprocessor expressions
# define INT64_C(value) value##LL
# define UINT64_C(value) value##uLL
@ -462,7 +491,7 @@ INT#_C macros if they're not already defined (John Maddock).
# define INTMAX_C(value) INT64_C(value)
# define UINTMAX_C(value) UINT64_C(value)
# endif
#endif
# endif // Borland/Microsoft specific width suffixes
#endif // INT#_C macros.