ceph/src/boost/boost/integer_traits.hpp

   1 /* boost integer_traits.hpp header file
   2  *
   3  * Copyright Jens Maurer 2000
   4  * Distributed under the Boost Software License, Version 1.0. (See
   5  * accompanying file LICENSE_1_0.txt or copy at
   6  * http://www.boost.org/LICENSE_1_0.txt)
   7  *
   8  * $Id$
   9  *
  10  * Idea by Beman Dawes, Ed Brey, Steve Cleary, and Nathan Myers
  11  */
  12
  13 //  See http://www.boost.org/libs/integer for documentation.
  14
  15
  16 #ifndef BOOST_INTEGER_TRAITS_HPP
  17 #define BOOST_INTEGER_TRAITS_HPP
  18
  19 #include <boost/config.hpp>
  20 #include <boost/limits.hpp>
  21
  22 // These are an implementation detail and not part of the interface
  23 #include <limits.h>
  24 // we need wchar.h for WCHAR_MAX/MIN but not all platforms provide it,
  25 // and some may have <wchar.h> but not <cwchar> ...
  26 #if !defined(BOOST_NO_INTRINSIC_WCHAR_T) && (!defined(BOOST_NO_CWCHAR) || defined(sun) || defined(__sun) || defined(__QNX__))
  27 #include <wchar.h>
  28 #endif
  29
  30 //
  31 // We simply cannot include this header on gcc without getting copious warnings of the kind:
  32 //
  33 // ../../../boost/integer_traits.hpp:164:66: warning: use of C99 long long integer constant
  34 //
  35 // And yet there is no other reasonable implementation, so we declare this a system header
  36 // to suppress these warnings.
  37 //
  38 #if defined(__GNUC__) && (__GNUC__ >= 4)
  39 #pragma GCC system_header
  40 #endif
  41
  42 namespace boost {
  43 template<class T>
  44 class integer_traits : public std::numeric_limits<T>
  45 {
  46 public:
  47   BOOST_STATIC_CONSTANT(bool, is_integral = false);
  48 };
  49
  50 namespace detail {
  51 template<class T, T min_val, T max_val>
  52 class integer_traits_base
  53 {
  54 public:
  55   BOOST_STATIC_CONSTANT(bool, is_integral = true);
  56   BOOST_STATIC_CONSTANT(T, const_min = min_val);
  57   BOOST_STATIC_CONSTANT(T, const_max = max_val);
  58 };
  59
  60 #ifndef BOOST_NO_INCLASS_MEMBER_INITIALIZATION
  61 //  A definition is required even for integral static constants
  62 template<class T, T min_val, T max_val>
  63 const bool integer_traits_base<T, min_val, max_val>::is_integral;
  64
  65 template<class T, T min_val, T max_val>
  66 const T integer_traits_base<T, min_val, max_val>::const_min;
  67
  68 template<class T, T min_val, T max_val>
  69 const T integer_traits_base<T, min_val, max_val>::const_max;
  70 #endif
  71
  72 } // namespace detail
  73
  74 template<>
  75 class integer_traits<bool>
  76   : public std::numeric_limits<bool>,
  77     public detail::integer_traits_base<bool, false, true>
  78 { };
  79
  80 template<>
  81 class integer_traits<char>
  82   : public std::numeric_limits<char>,
  83     public detail::integer_traits_base<char, CHAR_MIN, CHAR_MAX>
  84 { };
  85
  86 template<>
  87 class integer_traits<signed char>
  88   : public std::numeric_limits<signed char>,
  89     public detail::integer_traits_base<signed char, SCHAR_MIN, SCHAR_MAX>
  90 { };
  91
  92 template<>
  93 class integer_traits<unsigned char>
  94   : public std::numeric_limits<unsigned char>,
  95     public detail::integer_traits_base<unsigned char, 0, UCHAR_MAX>
  96 { };
  97
  98 #ifndef BOOST_NO_INTRINSIC_WCHAR_T
  99 template<>
 100 class integer_traits<wchar_t>
 101   : public std::numeric_limits<wchar_t>,
 102     // Don't trust WCHAR_MIN and WCHAR_MAX with Mac OS X's native
 103     // library: they are wrong!
 104 #if defined(WCHAR_MIN) && defined(WCHAR_MAX) && !defined(__APPLE__)
 105     public detail::integer_traits_base<wchar_t, WCHAR_MIN, WCHAR_MAX>
 106 #elif defined(BOOST_BORLANDC) || defined(__CYGWIN__) || defined(__MINGW32__) || (defined(__BEOS__) && defined(__GNUC__))
 107     // No WCHAR_MIN and WCHAR_MAX, whar_t is short and unsigned:
 108     public detail::integer_traits_base<wchar_t, 0, 0xffff>
 109 #elif (defined(__sgi) && (!defined(__SGI_STL_PORT) || __SGI_STL_PORT < 0x400))\
 110     || (defined __APPLE__)\
 111     || (defined(__OpenBSD__) && defined(__GNUC__))\
 112     || (defined(__NetBSD__) && defined(__GNUC__))\
 113     || (defined(__FreeBSD__) && defined(__GNUC__))\
 114     || (defined(__DragonFly__) && defined(__GNUC__))\
 115     || (defined(__hpux) && defined(__GNUC__) && (__GNUC__ == 3) && !defined(__SGI_STL_PORT))
 116     // No WCHAR_MIN and WCHAR_MAX, wchar_t has the same range as int.
 117     //  - SGI MIPSpro with native library
 118     //  - gcc 3.x on HP-UX
 119     //  - Mac OS X with native library
 120     //  - gcc on FreeBSD, OpenBSD and NetBSD
 121     public detail::integer_traits_base<wchar_t, INT_MIN, INT_MAX>
 122 #else
 123 #error No WCHAR_MIN and WCHAR_MAX present, please adjust integer_traits<> for your compiler.
 124 #endif
 125 { };
 126 #endif // BOOST_NO_INTRINSIC_WCHAR_T
 127
 128 template<>
 129 class integer_traits<short>
 130   : public std::numeric_limits<short>,
 131     public detail::integer_traits_base<short, SHRT_MIN, SHRT_MAX>
 132 { };
 133
 134 template<>
 135 class integer_traits<unsigned short>
 136   : public std::numeric_limits<unsigned short>,
 137     public detail::integer_traits_base<unsigned short, 0, USHRT_MAX>
 138 { };
 139
 140 template<>
 141 class integer_traits<int>
 142   : public std::numeric_limits<int>,
 143     public detail::integer_traits_base<int, INT_MIN, INT_MAX>
 144 { };
 145
 146 template<>
 147 class integer_traits<unsigned int>
 148   : public std::numeric_limits<unsigned int>,
 149     public detail::integer_traits_base<unsigned int, 0, UINT_MAX>
 150 { };
 151
 152 template<>
 153 class integer_traits<long>
 154   : public std::numeric_limits<long>,
 155     public detail::integer_traits_base<long, LONG_MIN, LONG_MAX>
 156 { };
 157
 158 template<>
 159 class integer_traits<unsigned long>
 160   : public std::numeric_limits<unsigned long>,
 161     public detail::integer_traits_base<unsigned long, 0, ULONG_MAX>
 162 { };
 163
 164 #if !defined(BOOST_NO_INTEGRAL_INT64_T) && !defined(BOOST_NO_INT64_T)
 165 #if defined(ULLONG_MAX) && defined(BOOST_HAS_LONG_LONG)
 166
 167 template<>
 168 class integer_traits< ::boost::long_long_type>
 169   : public std::numeric_limits< ::boost::long_long_type>,
 170     public detail::integer_traits_base< ::boost::long_long_type, LLONG_MIN, LLONG_MAX>
 171 { };
 172
 173 template<>
 174 class integer_traits< ::boost::ulong_long_type>
 175   : public std::numeric_limits< ::boost::ulong_long_type>,
 176     public detail::integer_traits_base< ::boost::ulong_long_type, 0, ULLONG_MAX>
 177 { };
 178
 179 #elif defined(ULONG_LONG_MAX) && defined(BOOST_HAS_LONG_LONG)
 180
 181 template<>
 182 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>{ };
 183 template<>
 184 class integer_traits< ::boost::ulong_long_type>
 185   : public std::numeric_limits< ::boost::ulong_long_type>,
 186     public detail::integer_traits_base< ::boost::ulong_long_type, 0, ULONG_LONG_MAX>
 187 { };
 188
 189 #elif defined(ULONGLONG_MAX) && defined(BOOST_HAS_LONG_LONG)
 190
 191 template<>
 192 class integer_traits< ::boost::long_long_type>
 193   : public std::numeric_limits< ::boost::long_long_type>,
 194     public detail::integer_traits_base< ::boost::long_long_type, LONGLONG_MIN, LONGLONG_MAX>
 195 { };
 196
 197 template<>
 198 class integer_traits< ::boost::ulong_long_type>
 199   : public std::numeric_limits< ::boost::ulong_long_type>,
 200     public detail::integer_traits_base< ::boost::ulong_long_type, 0, ULONGLONG_MAX>
 201 { };
 202
 203 #elif defined(_LLONG_MAX) && defined(_C2) && defined(BOOST_HAS_LONG_LONG)
 204
 205 template<>
 206 class integer_traits< ::boost::long_long_type>
 207   : public std::numeric_limits< ::boost::long_long_type>,
 208     public detail::integer_traits_base< ::boost::long_long_type, -_LLONG_MAX - _C2, _LLONG_MAX>
 209 { };
 210
 211 template<>
 212 class integer_traits< ::boost::ulong_long_type>
 213   : public std::numeric_limits< ::boost::ulong_long_type>,
 214     public detail::integer_traits_base< ::boost::ulong_long_type, 0, _ULLONG_MAX>
 215 { };
 216
 217 #elif defined(BOOST_HAS_LONG_LONG)
 218 //
 219 // we have long long but no constants, this happens for example with gcc in -ansi mode,
 220 // we'll just have to work out the values for ourselves (assumes 2's compliment representation):
 221 //
 222 template<>
 223 class integer_traits< ::boost::long_long_type>
 224   : public std::numeric_limits< ::boost::long_long_type>,
 225     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))>
 226 { };
 227
 228 template<>
 229 class integer_traits< ::boost::ulong_long_type>
 230   : public std::numeric_limits< ::boost::ulong_long_type>,
 231     public detail::integer_traits_base< ::boost::ulong_long_type, 0, ~0uLL>
 232 { };
 233
 234 #elif defined(BOOST_HAS_MS_INT64)
 235
 236 template<>
 237 class integer_traits< __int64>
 238   : public std::numeric_limits< __int64>,
 239     public detail::integer_traits_base< __int64, _I64_MIN, _I64_MAX>
 240 { };
 241
 242 template<>
 243 class integer_traits< unsigned __int64>
 244   : public std::numeric_limits< unsigned __int64>,
 245     public detail::integer_traits_base< unsigned __int64, 0, _UI64_MAX>
 246 { };
 247
 248 #endif
 249 #endif
 250
 251 } // namespace boost
 252
 253 #endif /* BOOST_INTEGER_TRAITS_HPP */
 254
 255
 256