+/* 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 32576 2006-02-05 10:19:42Z 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

+

+

+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>

+{ };

+

+#endif

+#endif

+

+} // namespace boost

+

+#endif /* BOOST_INTEGER_TRAITS_HPP */

+

+

+