Chris@16: /* boost integer_traits.hpp header file
Chris@16:  *
Chris@16:  * Copyright Jens Maurer 2000
Chris@16:  * Distributed under the Boost Software License, Version 1.0. (See
Chris@16:  * accompanying file LICENSE_1_0.txt or copy at
Chris@16:  * http://www.boost.org/LICENSE_1_0.txt)
Chris@16:  *
Chris@101:  * $Id$
Chris@16:  *
Chris@16:  * Idea by Beman Dawes, Ed Brey, Steve Cleary, and Nathan Myers
Chris@16:  */
Chris@16: 
Chris@16: //  See http://www.boost.org/libs/integer for documentation.
Chris@16: 
Chris@16: 
Chris@16: #ifndef BOOST_INTEGER_TRAITS_HPP
Chris@16: #define BOOST_INTEGER_TRAITS_HPP
Chris@16: 
Chris@16: #include <boost/config.hpp>
Chris@16: #include <boost/limits.hpp>
Chris@16: 
Chris@16: // These are an implementation detail and not part of the interface
Chris@16: #include <limits.h>
Chris@16: // we need wchar.h for WCHAR_MAX/MIN but not all platforms provide it,
Chris@16: // and some may have <wchar.h> but not <cwchar> ...
Chris@16: #if !defined(BOOST_NO_INTRINSIC_WCHAR_T) && (!defined(BOOST_NO_CWCHAR) || defined(sun) || defined(__sun) || defined(__QNX__))
Chris@16: #include <wchar.h>
Chris@16: #endif
Chris@16: 
Chris@16: //
Chris@16: // We simply cannot include this header on gcc without getting copious warnings of the kind:
Chris@16: //
Chris@16: // ../../../boost/integer_traits.hpp:164:66: warning: use of C99 long long integer constant
Chris@16: //
Chris@16: // And yet there is no other reasonable implementation, so we declare this a system header
Chris@16: // to suppress these warnings.
Chris@16: //
Chris@16: #if defined(__GNUC__) && (__GNUC__ >= 4)
Chris@16: #pragma GCC system_header
Chris@16: #endif
Chris@16: 
Chris@16: namespace boost {
Chris@16: template<class T>
Chris@16: class integer_traits : public std::numeric_limits<T>
Chris@16: {
Chris@16: public:
Chris@16:   BOOST_STATIC_CONSTANT(bool, is_integral = false);
Chris@16: };
Chris@16: 
Chris@16: namespace detail {
Chris@16: template<class T, T min_val, T max_val>
Chris@16: class integer_traits_base
Chris@16: {
Chris@16: public:
Chris@16:   BOOST_STATIC_CONSTANT(bool, is_integral = true);
Chris@16:   BOOST_STATIC_CONSTANT(T, const_min = min_val);
Chris@16:   BOOST_STATIC_CONSTANT(T, const_max = max_val);
Chris@16: };
Chris@16: 
Chris@16: #ifndef BOOST_NO_INCLASS_MEMBER_INITIALIZATION
Chris@16: //  A definition is required even for integral static constants
Chris@16: template<class T, T min_val, T max_val>
Chris@16: const bool integer_traits_base<T, min_val, max_val>::is_integral;
Chris@16: 
Chris@16: template<class T, T min_val, T max_val>
Chris@16: const T integer_traits_base<T, min_val, max_val>::const_min;
Chris@16: 
Chris@16: template<class T, T min_val, T max_val>
Chris@16: const T integer_traits_base<T, min_val, max_val>::const_max;
Chris@16: #endif
Chris@16: 
Chris@16: } // namespace detail
Chris@16: 
Chris@16: template<>
Chris@16: class integer_traits<bool>
Chris@16:   : public std::numeric_limits<bool>,
Chris@16:     public detail::integer_traits_base<bool, false, true>
Chris@16: { };
Chris@16: 
Chris@16: template<>
Chris@16: class integer_traits<char>
Chris@16:   : public std::numeric_limits<char>,
Chris@16:     public detail::integer_traits_base<char, CHAR_MIN, CHAR_MAX>
Chris@16: { };
Chris@16: 
Chris@16: template<>
Chris@16: class integer_traits<signed char>
Chris@16:   : public std::numeric_limits<signed char>,
Chris@16:     public detail::integer_traits_base<signed char, SCHAR_MIN, SCHAR_MAX>
Chris@16: { };
Chris@16: 
Chris@16: template<>
Chris@16: class integer_traits<unsigned char>
Chris@16:   : public std::numeric_limits<unsigned char>,
Chris@16:     public detail::integer_traits_base<unsigned char, 0, UCHAR_MAX>
Chris@16: { };
Chris@16: 
Chris@16: #ifndef BOOST_NO_INTRINSIC_WCHAR_T
Chris@16: template<>
Chris@16: class integer_traits<wchar_t>
Chris@16:   : public std::numeric_limits<wchar_t>,
Chris@16:     // Don't trust WCHAR_MIN and WCHAR_MAX with Mac OS X's native
Chris@16:     // library: they are wrong!
Chris@16: #if defined(WCHAR_MIN) && defined(WCHAR_MAX) && !defined(__APPLE__)
Chris@16:     public detail::integer_traits_base<wchar_t, WCHAR_MIN, WCHAR_MAX>
Chris@16: #elif defined(__BORLANDC__) || defined(__CYGWIN__) || defined(__MINGW32__) || (defined(__BEOS__) && defined(__GNUC__))
Chris@16:     // No WCHAR_MIN and WCHAR_MAX, whar_t is short and unsigned:
Chris@16:     public detail::integer_traits_base<wchar_t, 0, 0xffff>
Chris@16: #elif (defined(__sgi) && (!defined(__SGI_STL_PORT) || __SGI_STL_PORT < 0x400))\
Chris@16:     || (defined __APPLE__)\
Chris@16:     || (defined(__OpenBSD__) && defined(__GNUC__))\
Chris@16:     || (defined(__NetBSD__) && defined(__GNUC__))\
Chris@16:     || (defined(__FreeBSD__) && defined(__GNUC__))\
Chris@16:     || (defined(__DragonFly__) && defined(__GNUC__))\
Chris@16:     || (defined(__hpux) && defined(__GNUC__) && (__GNUC__ == 3) && !defined(__SGI_STL_PORT))
Chris@16:     // No WCHAR_MIN and WCHAR_MAX, wchar_t has the same range as int.
Chris@16:     //  - SGI MIPSpro with native library
Chris@16:     //  - gcc 3.x on HP-UX
Chris@16:     //  - Mac OS X with native library
Chris@16:     //  - gcc on FreeBSD, OpenBSD and NetBSD
Chris@16:     public detail::integer_traits_base<wchar_t, INT_MIN, INT_MAX>
Chris@16: #else
Chris@16: #error No WCHAR_MIN and WCHAR_MAX present, please adjust integer_traits<> for your compiler.
Chris@16: #endif
Chris@16: { };
Chris@16: #endif // BOOST_NO_INTRINSIC_WCHAR_T
Chris@16: 
Chris@16: template<>
Chris@16: class integer_traits<short>
Chris@16:   : public std::numeric_limits<short>,
Chris@16:     public detail::integer_traits_base<short, SHRT_MIN, SHRT_MAX>
Chris@16: { };
Chris@16: 
Chris@16: template<>
Chris@16: class integer_traits<unsigned short>
Chris@16:   : public std::numeric_limits<unsigned short>,
Chris@16:     public detail::integer_traits_base<unsigned short, 0, USHRT_MAX>
Chris@16: { };
Chris@16: 
Chris@16: template<>
Chris@16: class integer_traits<int>
Chris@16:   : public std::numeric_limits<int>,
Chris@16:     public detail::integer_traits_base<int, INT_MIN, INT_MAX>
Chris@16: { };
Chris@16: 
Chris@16: template<>
Chris@16: class integer_traits<unsigned int>
Chris@16:   : public std::numeric_limits<unsigned int>,
Chris@16:     public detail::integer_traits_base<unsigned int, 0, UINT_MAX>
Chris@16: { };
Chris@16: 
Chris@16: template<>
Chris@16: class integer_traits<long>
Chris@16:   : public std::numeric_limits<long>,
Chris@16:     public detail::integer_traits_base<long, LONG_MIN, LONG_MAX>
Chris@16: { };
Chris@16: 
Chris@16: template<>
Chris@16: class integer_traits<unsigned long>
Chris@16:   : public std::numeric_limits<unsigned long>,
Chris@16:     public detail::integer_traits_base<unsigned long, 0, ULONG_MAX>
Chris@16: { };
Chris@16: 
Chris@16: #if !defined(BOOST_NO_INTEGRAL_INT64_T) && !defined(BOOST_NO_INT64_T)
Chris@16: #if defined(ULLONG_MAX) && defined(BOOST_HAS_LONG_LONG)
Chris@16: 
Chris@16: template<>
Chris@16: class integer_traits< ::boost::long_long_type>
Chris@16:   : public std::numeric_limits< ::boost::long_long_type>,
Chris@16:     public detail::integer_traits_base< ::boost::long_long_type, LLONG_MIN, LLONG_MAX>
Chris@16: { };
Chris@16: 
Chris@16: template<>
Chris@16: class integer_traits< ::boost::ulong_long_type>
Chris@16:   : public std::numeric_limits< ::boost::ulong_long_type>,
Chris@16:     public detail::integer_traits_base< ::boost::ulong_long_type, 0, ULLONG_MAX>
Chris@16: { };
Chris@16: 
Chris@16: #elif defined(ULONG_LONG_MAX) && defined(BOOST_HAS_LONG_LONG)
Chris@16: 
Chris@16: template<>
Chris@16: 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>{ };
Chris@16: template<>
Chris@16: class integer_traits< ::boost::ulong_long_type>
Chris@16:   : public std::numeric_limits< ::boost::ulong_long_type>,
Chris@16:     public detail::integer_traits_base< ::boost::ulong_long_type, 0, ULONG_LONG_MAX>
Chris@16: { };
Chris@16: 
Chris@16: #elif defined(ULONGLONG_MAX) && defined(BOOST_HAS_LONG_LONG)
Chris@16: 
Chris@16: template<>
Chris@16: class integer_traits< ::boost::long_long_type>
Chris@16:   : public std::numeric_limits< ::boost::long_long_type>,
Chris@16:     public detail::integer_traits_base< ::boost::long_long_type, LONGLONG_MIN, LONGLONG_MAX>
Chris@16: { };
Chris@16: 
Chris@16: template<>
Chris@16: class integer_traits< ::boost::ulong_long_type>
Chris@16:   : public std::numeric_limits< ::boost::ulong_long_type>,
Chris@16:     public detail::integer_traits_base< ::boost::ulong_long_type, 0, ULONGLONG_MAX>
Chris@16: { };
Chris@16: 
Chris@16: #elif defined(_LLONG_MAX) && defined(_C2) && defined(BOOST_HAS_LONG_LONG)
Chris@16: 
Chris@16: template<>
Chris@16: class integer_traits< ::boost::long_long_type>
Chris@16:   : public std::numeric_limits< ::boost::long_long_type>,
Chris@16:     public detail::integer_traits_base< ::boost::long_long_type, -_LLONG_MAX - _C2, _LLONG_MAX>
Chris@16: { };
Chris@16: 
Chris@16: template<>
Chris@16: class integer_traits< ::boost::ulong_long_type>
Chris@16:   : public std::numeric_limits< ::boost::ulong_long_type>,
Chris@16:     public detail::integer_traits_base< ::boost::ulong_long_type, 0, _ULLONG_MAX>
Chris@16: { };
Chris@16: 
Chris@16: #elif defined(BOOST_HAS_LONG_LONG)
Chris@16: //
Chris@16: // we have long long but no constants, this happens for example with gcc in -ansi mode,
Chris@16: // we'll just have to work out the values for ourselves (assumes 2's compliment representation):
Chris@16: //
Chris@16: template<>
Chris@16: class integer_traits< ::boost::long_long_type>
Chris@16:   : public std::numeric_limits< ::boost::long_long_type>,
Chris@16:     public detail::integer_traits_base< ::boost::long_long_type, (1LL << (sizeof(::boost::long_long_type) * CHAR_BIT - 1)), ~(1LL << (sizeof(::boost::long_long_type) * CHAR_BIT - 1))>
Chris@16: { };
Chris@16: 
Chris@16: template<>
Chris@16: class integer_traits< ::boost::ulong_long_type>
Chris@16:   : public std::numeric_limits< ::boost::ulong_long_type>,
Chris@16:     public detail::integer_traits_base< ::boost::ulong_long_type, 0, ~0uLL>
Chris@16: { };
Chris@16: 
Chris@16: #elif defined(BOOST_HAS_MS_INT64)
Chris@16: 
Chris@16: template<>
Chris@16: class integer_traits< __int64>
Chris@16:   : public std::numeric_limits< __int64>,
Chris@16:     public detail::integer_traits_base< __int64, _I64_MIN, _I64_MAX>
Chris@16: { };
Chris@16: 
Chris@16: template<>
Chris@16: class integer_traits< unsigned __int64>
Chris@16:   : public std::numeric_limits< unsigned __int64>,
Chris@16:     public detail::integer_traits_base< unsigned __int64, 0, _UI64_MAX>
Chris@16: { };
Chris@16: 
Chris@16: #endif
Chris@16: #endif
Chris@16: 
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #endif /* BOOST_INTEGER_TRAITS_HPP */
Chris@16: 
Chris@16: 
Chris@16: