mirror of
https://github.com/yuzu-emu/ext-boost.git
synced 2024-12-22 18:15:38 +00:00
263 lines
11 KiB
C++
263 lines
11 KiB
C++
// boost integer.hpp header file -------------------------------------------//
|
|
|
|
// Copyright Beman Dawes and Daryle Walker 1999. 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)
|
|
|
|
// See http://www.boost.org/libs/integer for documentation.
|
|
|
|
// Revision History
|
|
// 22 Sep 01 Added value-based integer templates. (Daryle Walker)
|
|
// 01 Apr 01 Modified to use new <boost/limits.hpp> header. (John Maddock)
|
|
// 30 Jul 00 Add typename syntax fix (Jens Maurer)
|
|
// 28 Aug 99 Initial version
|
|
|
|
#ifndef BOOST_INTEGER_HPP
|
|
#define BOOST_INTEGER_HPP
|
|
|
|
#include <boost/integer_fwd.hpp> // self include
|
|
|
|
#include <boost/integer_traits.hpp> // for boost::::boost::integer_traits
|
|
#include <boost/limits.hpp> // for ::std::numeric_limits
|
|
#include <boost/cstdint.hpp> // for boost::int64_t and BOOST_NO_INTEGRAL_INT64_T
|
|
#include <boost/static_assert.hpp>
|
|
|
|
//
|
|
// We simply cannot include this header on gcc without getting copious warnings of the kind:
|
|
//
|
|
// boost/integer.hpp:77:30: 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
|
|
{
|
|
|
|
// Helper templates ------------------------------------------------------//
|
|
|
|
// fast integers from least integers
|
|
// int_fast_t<> works correctly for unsigned too, in spite of the name.
|
|
template< typename LeastInt >
|
|
struct int_fast_t
|
|
{
|
|
typedef LeastInt fast;
|
|
typedef fast type;
|
|
}; // imps may specialize
|
|
|
|
namespace detail{
|
|
|
|
// convert category to type
|
|
template< int Category > struct int_least_helper {}; // default is empty
|
|
template< int Category > struct uint_least_helper {}; // default is empty
|
|
|
|
// specializatons: 1=long, 2=int, 3=short, 4=signed char,
|
|
// 6=unsigned long, 7=unsigned int, 8=unsigned short, 9=unsigned char
|
|
// no specializations for 0 and 5: requests for a type > long are in error
|
|
#ifdef BOOST_HAS_LONG_LONG
|
|
template<> struct int_least_helper<1> { typedef boost::long_long_type least; };
|
|
#elif defined(BOOST_HAS_MS_INT64)
|
|
template<> struct int_least_helper<1> { typedef __int64 least; };
|
|
#endif
|
|
template<> struct int_least_helper<2> { typedef long least; };
|
|
template<> struct int_least_helper<3> { typedef int least; };
|
|
template<> struct int_least_helper<4> { typedef short least; };
|
|
template<> struct int_least_helper<5> { typedef signed char least; };
|
|
#ifdef BOOST_HAS_LONG_LONG
|
|
template<> struct uint_least_helper<1> { typedef boost::ulong_long_type least; };
|
|
#elif defined(BOOST_HAS_MS_INT64)
|
|
template<> struct uint_least_helper<1> { typedef unsigned __int64 least; };
|
|
#endif
|
|
template<> struct uint_least_helper<2> { typedef unsigned long least; };
|
|
template<> struct uint_least_helper<3> { typedef unsigned int least; };
|
|
template<> struct uint_least_helper<4> { typedef unsigned short least; };
|
|
template<> struct uint_least_helper<5> { typedef unsigned char least; };
|
|
|
|
template <int Bits>
|
|
struct exact_signed_base_helper{};
|
|
template <int Bits>
|
|
struct exact_unsigned_base_helper{};
|
|
|
|
template <> struct exact_signed_base_helper<sizeof(signed char)* CHAR_BIT> { typedef signed char exact; };
|
|
template <> struct exact_unsigned_base_helper<sizeof(unsigned char)* CHAR_BIT> { typedef unsigned char exact; };
|
|
#if USHRT_MAX != UCHAR_MAX
|
|
template <> struct exact_signed_base_helper<sizeof(short)* CHAR_BIT> { typedef short exact; };
|
|
template <> struct exact_unsigned_base_helper<sizeof(unsigned short)* CHAR_BIT> { typedef unsigned short exact; };
|
|
#endif
|
|
#if UINT_MAX != USHRT_MAX
|
|
template <> struct exact_signed_base_helper<sizeof(int)* CHAR_BIT> { typedef int exact; };
|
|
template <> struct exact_unsigned_base_helper<sizeof(unsigned int)* CHAR_BIT> { typedef unsigned int exact; };
|
|
#endif
|
|
#if ULONG_MAX != UINT_MAX && ( !defined __TI_COMPILER_VERSION__ || \
|
|
( __TI_COMPILER_VERSION__ >= 7000000 && !defined __TI_40BIT_LONG__ ) )
|
|
template <> struct exact_signed_base_helper<sizeof(long)* CHAR_BIT> { typedef long exact; };
|
|
template <> struct exact_unsigned_base_helper<sizeof(unsigned long)* CHAR_BIT> { typedef unsigned long exact; };
|
|
#endif
|
|
#if defined(BOOST_HAS_LONG_LONG) &&\
|
|
((defined(ULLONG_MAX) && (ULLONG_MAX != ULONG_MAX)) ||\
|
|
(defined(ULONG_LONG_MAX) && (ULONG_LONG_MAX != ULONG_MAX)) ||\
|
|
(defined(ULONGLONG_MAX) && (ULONGLONG_MAX != ULONG_MAX)) ||\
|
|
(defined(_ULLONG_MAX) && (_ULLONG_MAX != ULONG_MAX)))
|
|
template <> struct exact_signed_base_helper<sizeof(boost::long_long_type)* CHAR_BIT> { typedef boost::long_long_type exact; };
|
|
template <> struct exact_unsigned_base_helper<sizeof(boost::ulong_long_type)* CHAR_BIT> { typedef boost::ulong_long_type exact; };
|
|
#endif
|
|
|
|
|
|
} // namespace detail
|
|
|
|
// integer templates specifying number of bits ---------------------------//
|
|
|
|
// signed
|
|
template< int Bits > // bits (including sign) required
|
|
struct int_t : public boost::detail::exact_signed_base_helper<Bits>
|
|
{
|
|
BOOST_STATIC_ASSERT_MSG(Bits <= (int)(sizeof(boost::intmax_t) * CHAR_BIT),
|
|
"No suitable signed integer type with the requested number of bits is available.");
|
|
typedef typename boost::detail::int_least_helper
|
|
<
|
|
#ifdef BOOST_HAS_LONG_LONG
|
|
(Bits <= (int)(sizeof(boost::long_long_type) * CHAR_BIT)) +
|
|
#else
|
|
1 +
|
|
#endif
|
|
(Bits-1 <= ::std::numeric_limits<long>::digits) +
|
|
(Bits-1 <= ::std::numeric_limits<int>::digits) +
|
|
(Bits-1 <= ::std::numeric_limits<short>::digits) +
|
|
(Bits-1 <= ::std::numeric_limits<signed char>::digits)
|
|
>::least least;
|
|
typedef typename int_fast_t<least>::type fast;
|
|
};
|
|
|
|
// unsigned
|
|
template< int Bits > // bits required
|
|
struct uint_t : public boost::detail::exact_unsigned_base_helper<Bits>
|
|
{
|
|
BOOST_STATIC_ASSERT_MSG(Bits <= (int)(sizeof(boost::uintmax_t) * CHAR_BIT),
|
|
"No suitable unsigned integer type with the requested number of bits is available.");
|
|
#if (defined(__BORLANDC__) || defined(__CODEGEAR__)) && defined(BOOST_NO_INTEGRAL_INT64_T)
|
|
// It's really not clear why this workaround should be needed... shrug I guess! JM
|
|
BOOST_STATIC_CONSTANT(int, s =
|
|
6 +
|
|
(Bits <= ::std::numeric_limits<unsigned long>::digits) +
|
|
(Bits <= ::std::numeric_limits<unsigned int>::digits) +
|
|
(Bits <= ::std::numeric_limits<unsigned short>::digits) +
|
|
(Bits <= ::std::numeric_limits<unsigned char>::digits));
|
|
typedef typename detail::int_least_helper< ::boost::uint_t<Bits>::s>::least least;
|
|
#else
|
|
typedef typename boost::detail::uint_least_helper
|
|
<
|
|
#ifdef BOOST_HAS_LONG_LONG
|
|
(Bits <= (int)(sizeof(boost::long_long_type) * CHAR_BIT)) +
|
|
#else
|
|
1 +
|
|
#endif
|
|
(Bits <= ::std::numeric_limits<unsigned long>::digits) +
|
|
(Bits <= ::std::numeric_limits<unsigned int>::digits) +
|
|
(Bits <= ::std::numeric_limits<unsigned short>::digits) +
|
|
(Bits <= ::std::numeric_limits<unsigned char>::digits)
|
|
>::least least;
|
|
#endif
|
|
typedef typename int_fast_t<least>::type fast;
|
|
// int_fast_t<> works correctly for unsigned too, in spite of the name.
|
|
};
|
|
|
|
// integer templates specifying extreme value ----------------------------//
|
|
|
|
// signed
|
|
#if !defined(BOOST_NO_INTEGRAL_INT64_T) && !defined(BOOST_NO_INT64_T) && defined(BOOST_HAS_LONG_LONG)
|
|
template< boost::long_long_type MaxValue > // maximum value to require support
|
|
#else
|
|
template< long MaxValue > // maximum value to require support
|
|
#endif
|
|
struct int_max_value_t
|
|
{
|
|
typedef typename boost::detail::int_least_helper
|
|
<
|
|
#if !defined(BOOST_NO_INTEGRAL_INT64_T) && !defined(BOOST_NO_INT64_T) && defined(BOOST_HAS_LONG_LONG)
|
|
(MaxValue <= ::boost::integer_traits<boost::long_long_type>::const_max) +
|
|
#else
|
|
1 +
|
|
#endif
|
|
(MaxValue <= ::boost::integer_traits<long>::const_max) +
|
|
(MaxValue <= ::boost::integer_traits<int>::const_max) +
|
|
(MaxValue <= ::boost::integer_traits<short>::const_max) +
|
|
(MaxValue <= ::boost::integer_traits<signed char>::const_max)
|
|
>::least least;
|
|
typedef typename int_fast_t<least>::type fast;
|
|
};
|
|
|
|
#if !defined(BOOST_NO_INTEGRAL_INT64_T) && !defined(BOOST_NO_INT64_T) && defined(BOOST_HAS_LONG_LONG)
|
|
template< boost::long_long_type MinValue > // minimum value to require support
|
|
#else
|
|
template< long MinValue > // minimum value to require support
|
|
#endif
|
|
struct int_min_value_t
|
|
{
|
|
typedef typename boost::detail::int_least_helper
|
|
<
|
|
#if !defined(BOOST_NO_INTEGRAL_INT64_T) && !defined(BOOST_NO_INT64_T) && defined(BOOST_HAS_LONG_LONG)
|
|
(MinValue >= ::boost::integer_traits<boost::long_long_type>::const_min) +
|
|
#else
|
|
1 +
|
|
#endif
|
|
(MinValue >= ::boost::integer_traits<long>::const_min) +
|
|
(MinValue >= ::boost::integer_traits<int>::const_min) +
|
|
(MinValue >= ::boost::integer_traits<short>::const_min) +
|
|
(MinValue >= ::boost::integer_traits<signed char>::const_min)
|
|
>::least least;
|
|
typedef typename int_fast_t<least>::type fast;
|
|
};
|
|
|
|
// unsigned
|
|
#if !defined(BOOST_NO_INTEGRAL_INT64_T) && defined(BOOST_HAS_LONG_LONG)
|
|
template< boost::ulong_long_type MaxValue > // minimum value to require support
|
|
#else
|
|
template< unsigned long MaxValue > // minimum value to require support
|
|
#endif
|
|
struct uint_value_t
|
|
{
|
|
#if (defined(__BORLANDC__) || defined(__CODEGEAR__))
|
|
// It's really not clear why this workaround should be needed... shrug I guess! JM
|
|
#if defined(BOOST_NO_INTEGRAL_INT64_T)
|
|
BOOST_STATIC_CONSTANT(unsigned, which =
|
|
1 +
|
|
(MaxValue <= ::boost::integer_traits<unsigned long>::const_max) +
|
|
(MaxValue <= ::boost::integer_traits<unsigned int>::const_max) +
|
|
(MaxValue <= ::boost::integer_traits<unsigned short>::const_max) +
|
|
(MaxValue <= ::boost::integer_traits<unsigned char>::const_max));
|
|
typedef typename detail::int_least_helper< ::boost::uint_value_t<MaxValue>::which>::least least;
|
|
#else // BOOST_NO_INTEGRAL_INT64_T
|
|
BOOST_STATIC_CONSTANT(unsigned, which =
|
|
1 +
|
|
(MaxValue <= ::boost::integer_traits<boost::ulong_long_type>::const_max) +
|
|
(MaxValue <= ::boost::integer_traits<unsigned long>::const_max) +
|
|
(MaxValue <= ::boost::integer_traits<unsigned int>::const_max) +
|
|
(MaxValue <= ::boost::integer_traits<unsigned short>::const_max) +
|
|
(MaxValue <= ::boost::integer_traits<unsigned char>::const_max));
|
|
typedef typename detail::uint_least_helper< ::boost::uint_value_t<MaxValue>::which>::least least;
|
|
#endif // BOOST_NO_INTEGRAL_INT64_T
|
|
#else
|
|
typedef typename boost::detail::uint_least_helper
|
|
<
|
|
#if !defined(BOOST_NO_INTEGRAL_INT64_T) && defined(BOOST_HAS_LONG_LONG)
|
|
(MaxValue <= ::boost::integer_traits<boost::ulong_long_type>::const_max) +
|
|
#else
|
|
1 +
|
|
#endif
|
|
(MaxValue <= ::boost::integer_traits<unsigned long>::const_max) +
|
|
(MaxValue <= ::boost::integer_traits<unsigned int>::const_max) +
|
|
(MaxValue <= ::boost::integer_traits<unsigned short>::const_max) +
|
|
(MaxValue <= ::boost::integer_traits<unsigned char>::const_max)
|
|
>::least least;
|
|
#endif
|
|
typedef typename int_fast_t<least>::type fast;
|
|
};
|
|
|
|
|
|
} // namespace boost
|
|
|
|
#endif // BOOST_INTEGER_HPP
|