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Added support for exact width integer type to int_t and uint_t

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Updated docs to match.
Fixes #1225.

[SVN r57941]
This commit is contained in:
John Maddock
2009-11-26 11:08:27 +00:00
parent ca84baa55d
commit ac155d3843
9 changed files with 338 additions and 338 deletions
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45
include/boost/integer.hpp
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@ -21,6 +21,18 @@
#include <boost/limits.hpp> // for ::std::numeric_limits
#include <boost/cstdint.hpp> // for boost::int64_t and BOOST_NO_INTEGRAL_INT64_T
//
// 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
{
@ -54,13 +66,42 @@ namespace boost
template<> struct int_least_helper<9> { typedef unsigned short least; };
template<> struct int_least_helper<10> { 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
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(long long)* CHAR_BIT> { typedef long long exact; };
template <> struct exact_unsigned_base_helper<sizeof(unsigned long long)* CHAR_BIT> { typedef unsigned long long exact; };
#endif
} // namespace detail
// integer templates specifying number of bits ---------------------------//
// signed
template< int Bits > // bits (including sign) required
struct int_t
struct int_t : public detail::exact_signed_base_helper<Bits>
{
typedef typename detail::int_least_helper
<
@ -79,7 +120,7 @@ namespace boost
// unsigned
template< int Bits > // bits required
struct uint_t
struct uint_t : public detail::exact_unsigned_base_helper<Bits>
{
typedef typename detail::int_least_helper
<