/* boost integer_traits.hpp header file * * Copyright Jens Maurer 2000 * Distributed under the Boost Software License, Version 1.0. (See * accompanying file LICENSE_1_0.txt or copy at * http://www.boost.org/LICENSE_1_0.txt) * * $Id: integer_traits.hpp 58381 2009-12-14 18:14:48Z johnmaddock $ * * Idea by Beman Dawes, Ed Brey, Steve Cleary, and Nathan Myers */ // See http://www.boost.org/libs/integer for documentation. #ifndef BOOST_INTEGER_TRAITS_HPP #define BOOST_INTEGER_TRAITS_HPP #include <boost/config.hpp> #include <boost/limits.hpp> // These are an implementation detail and not part of the interface #include <limits.h> // we need wchar.h for WCHAR_MAX/MIN but not all platforms provide it, // and some may have <wchar.h> but not <cwchar> ... #if !defined(BOOST_NO_INTRINSIC_WCHAR_T) && (!defined(BOOST_NO_CWCHAR) || defined(sun) || defined(__sun) || defined(__QNX__)) #include <wchar.h> #endif // // We simply cannot include this header on gcc without getting copious warnings of the kind: // // ../../../boost/integer_traits.hpp:164:66: warning: use of C99 long long integer constant // // And yet there is no other reasonable implementation, so we declare this a system header // to suppress these warnings. // #if defined(__GNUC__) && (__GNUC__ >= 4) #pragma GCC system_header #endif namespace boost { template<class T> class integer_traits : public std::numeric_limits<T> { public: BOOST_STATIC_CONSTANT(bool, is_integral = false); }; namespace detail { template<class T, T min_val, T max_val> class integer_traits_base { public: BOOST_STATIC_CONSTANT(bool, is_integral = true); BOOST_STATIC_CONSTANT(T, const_min = min_val); BOOST_STATIC_CONSTANT(T, const_max = max_val); }; #ifndef BOOST_NO_INCLASS_MEMBER_INITIALIZATION // A definition is required even for integral static constants template<class T, T min_val, T max_val> const bool integer_traits_base<T, min_val, max_val>::is_integral; template<class T, T min_val, T max_val> const T integer_traits_base<T, min_val, max_val>::const_min; template<class T, T min_val, T max_val> const T integer_traits_base<T, min_val, max_val>::const_max; #endif } // namespace detail template<> class integer_traits<bool> : public std::numeric_limits<bool>, public detail::integer_traits_base<bool, false, true> { }; template<> class integer_traits<char> : public std::numeric_limits<char>, public detail::integer_traits_base<char, CHAR_MIN, CHAR_MAX> { }; template<> class integer_traits<signed char> : public std::numeric_limits<signed char>, public detail::integer_traits_base<signed char, SCHAR_MIN, SCHAR_MAX> { }; template<> class integer_traits<unsigned char> : public std::numeric_limits<unsigned char>, public detail::integer_traits_base<unsigned char, 0, UCHAR_MAX> { }; #ifndef BOOST_NO_INTRINSIC_WCHAR_T template<> class integer_traits<wchar_t> : public std::numeric_limits<wchar_t>, // Don't trust WCHAR_MIN and WCHAR_MAX with Mac OS X's native // library: they are wrong! #if defined(WCHAR_MIN) && defined(WCHAR_MAX) && !defined(__APPLE__) public detail::integer_traits_base<wchar_t, WCHAR_MIN, WCHAR_MAX> #elif defined(__BORLANDC__) || defined(__CYGWIN__) || defined(__MINGW32__) || (defined(__BEOS__) && defined(__GNUC__)) // No WCHAR_MIN and WCHAR_MAX, whar_t is short and unsigned: public detail::integer_traits_base<wchar_t, 0, 0xffff> #elif (defined(__sgi) && (!defined(__SGI_STL_PORT) || __SGI_STL_PORT < 0x400))\ || (defined __APPLE__)\ || (defined(__OpenBSD__) && defined(__GNUC__))\ || (defined(__NetBSD__) && defined(__GNUC__))\ || (defined(__FreeBSD__) && defined(__GNUC__))\ || (defined(__DragonFly__) && defined(__GNUC__))\ || (defined(__hpux) && defined(__GNUC__) && (__GNUC__ == 3) && !defined(__SGI_STL_PORT)) // No WCHAR_MIN and WCHAR_MAX, wchar_t has the same range as int. // - SGI MIPSpro with native library // - gcc 3.x on HP-UX // - Mac OS X with native library // - gcc on FreeBSD, OpenBSD and NetBSD public detail::integer_traits_base<wchar_t, INT_MIN, INT_MAX> #elif defined(__hpux) && defined(__GNUC__) && (__GNUC__ == 2) && !defined(__SGI_STL_PORT) // No WCHAR_MIN and WCHAR_MAX, wchar_t has the same range as unsigned int. // - gcc 2.95.x on HP-UX // (also, std::numeric_limits<wchar_t> appears to return the wrong values). public detail::integer_traits_base<wchar_t, 0, UINT_MAX> #else #error No WCHAR_MIN and WCHAR_MAX present, please adjust integer_traits<> for your compiler. #endif { }; #endif // BOOST_NO_INTRINSIC_WCHAR_T template<> class integer_traits<short> : public std::numeric_limits<short>, public detail::integer_traits_base<short, SHRT_MIN, SHRT_MAX> { }; template<> class integer_traits<unsigned short> : public std::numeric_limits<unsigned short>, public detail::integer_traits_base<unsigned short, 0, USHRT_MAX> { }; template<> class integer_traits<int> : public std::numeric_limits<int>, public detail::integer_traits_base<int, INT_MIN, INT_MAX> { }; template<> class integer_traits<unsigned int> : public std::numeric_limits<unsigned int>, public detail::integer_traits_base<unsigned int, 0, UINT_MAX> { }; template<> class integer_traits<long> : public std::numeric_limits<long>, public detail::integer_traits_base<long, LONG_MIN, LONG_MAX> { }; template<> class integer_traits<unsigned long> : public std::numeric_limits<unsigned long>, public detail::integer_traits_base<unsigned long, 0, ULONG_MAX> { }; #if !defined(BOOST_NO_INTEGRAL_INT64_T) && !defined(BOOST_NO_INT64_T) #if defined(ULLONG_MAX) && defined(BOOST_HAS_LONG_LONG) template<> class integer_traits< ::boost::long_long_type> : public std::numeric_limits< ::boost::long_long_type>, public detail::integer_traits_base< ::boost::long_long_type, LLONG_MIN, LLONG_MAX> { }; template<> class integer_traits< ::boost::ulong_long_type> : public std::numeric_limits< ::boost::ulong_long_type>, public detail::integer_traits_base< ::boost::ulong_long_type, 0, ULLONG_MAX> { }; #elif defined(ULONG_LONG_MAX) && defined(BOOST_HAS_LONG_LONG) template<> class integer_traits< ::boost::long_long_type> : public std::numeric_limits< ::boost::long_long_type>, public detail::integer_traits_base< ::boost::long_long_type, LONG_LONG_MIN, LONG_LONG_MAX>{ }; template<> class integer_traits< ::boost::ulong_long_type> : public std::numeric_limits< ::boost::ulong_long_type>, public detail::integer_traits_base< ::boost::ulong_long_type, 0, ULONG_LONG_MAX> { }; #elif defined(ULONGLONG_MAX) && defined(BOOST_HAS_LONG_LONG) template<> class integer_traits< ::boost::long_long_type> : public std::numeric_limits< ::boost::long_long_type>, public detail::integer_traits_base< ::boost::long_long_type, LONGLONG_MIN, LONGLONG_MAX> { }; template<> class integer_traits< ::boost::ulong_long_type> : public std::numeric_limits< ::boost::ulong_long_type>, public detail::integer_traits_base< ::boost::ulong_long_type, 0, ULONGLONG_MAX> { }; #elif defined(_LLONG_MAX) && defined(_C2) && defined(BOOST_HAS_LONG_LONG) template<> class integer_traits< ::boost::long_long_type> : public std::numeric_limits< ::boost::long_long_type>, public detail::integer_traits_base< ::boost::long_long_type, -_LLONG_MAX - _C2, _LLONG_MAX> { }; template<> class integer_traits< ::boost::ulong_long_type> : public std::numeric_limits< ::boost::ulong_long_type>, public detail::integer_traits_base< ::boost::ulong_long_type, 0, _ULLONG_MAX> { }; #elif defined(BOOST_HAS_LONG_LONG) // // we have long long but no constants, this happens for example with gcc in -ansi mode, // we'll just have to work out the values for ourselves (assumes 2's compliment representation): // template<> class integer_traits< ::boost::long_long_type> : public std::numeric_limits< ::boost::long_long_type>, public detail::integer_traits_base< ::boost::long_long_type, (1LL << (sizeof(::boost::long_long_type) - 1)), ~(1LL << (sizeof(::boost::long_long_type) - 1))> { }; template<> class integer_traits< ::boost::ulong_long_type> : public std::numeric_limits< ::boost::ulong_long_type>, public detail::integer_traits_base< ::boost::ulong_long_type, 0, ~0uLL> { }; #elif defined(BOOST_HAS_MS_INT64) template<> class integer_traits< __int64> : public std::numeric_limits< __int64>, public detail::integer_traits_base< __int64, _I64_MIN, _I64_MAX> { }; template<> class integer_traits< unsigned __int64> : public std::numeric_limits< unsigned __int64>, public detail::integer_traits_base< unsigned __int64, 0, _UI64_MAX> { }; #endif #endif } // namespace boost #endif /* BOOST_INTEGER_TRAITS_HPP */