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Implement boost::core::endian

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This commit is contained in:
Peter Dimov
2020-12-29 02:41:15 +02:00
parent 919b98d425
commit 16e9536146
3 changed files with 73 additions and 4 deletions
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40
include/boost/core/bit.hpp
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@@ -506,13 +506,43 @@ BOOST_CXX14_CONSTEXPR T bit_ceil( T x ) BOOST_NOEXCEPT
// endian
#if defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
# define BOOST_CORE_BIT_NATIVE_INITIALIZER =little
#elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
# define BOOST_CORE_BIT_NATIVE_INITIALIZER =big
#elif defined(__BYTE_ORDER__) && defined(__ORDER_PDP_ENDIAN__) && __BYTE_ORDER__ == __ORDER_PDP_ENDIAN__
# define BOOST_CORE_BIT_NATIVE_INITIALIZER
#elif defined(__LITTLE_ENDIAN__)
# define BOOST_CORE_BIT_NATIVE_INITIALIZER =little
#elif defined(__BIG_ENDIAN__)
# define BOOST_CORE_BIT_NATIVE_INITIALIZER =big
#elif defined(_MSC_VER) || defined(__i386__) || defined(__x86_64__)
# define BOOST_CORE_BIT_NATIVE_INITIALIZER =little
#else
# define BOOST_CORE_BIT_NATIVE_INITIALIZER
#endif
#if !defined(BOOST_NO_CXX11_SCOPED_ENUMS)
enum class endian
{
little,
big,
// native = /* see description */
little,
native BOOST_CORE_BIT_NATIVE_INITIALIZER
};
typedef endian endian_type;
@@ -524,9 +554,9 @@ namespace endian
enum type
{
little,
big,
// native = /* see description */
little,
native BOOST_CORE_BIT_NATIVE_INITIALIZER
};
} // namespace endian
@@ -535,6 +565,8 @@ typedef endian::type endian_type;
#endif
#undef BOOST_CORE_BIT_NATIVE_INITIALIZER
} // namespace core
} // namespace boost