Boost C++ Libraries

boost/endian/detail/order.hpp

#ifndef BOOST_ENDIAN_DETAIL_ORDER_HPP_INCLUDED
#define BOOST_ENDIAN_DETAIL_ORDER_HPP_INCLUDED

// Copyright 2019 Peter Dimov
//
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt

#if defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__

# define BOOST_ENDIAN_NATIVE_ORDER_INITIALIZER little

#elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__

# define BOOST_ENDIAN_NATIVE_ORDER_INITIALIZER big

#elif defined(__BYTE_ORDER__) && defined(__ORDER_PDP_ENDIAN__) && __BYTE_ORDER__ == __ORDER_PDP_ENDIAN__

# error The Boost.Endian library does not support platforms with PDP endianness.

#elif defined(__LITTLE_ENDIAN__)

# define BOOST_ENDIAN_NATIVE_ORDER_INITIALIZER little

#elif defined(__BIG_ENDIAN__)

# define BOOST_ENDIAN_NATIVE_ORDER_INITIALIZER big

#elif defined(_MSC_VER) || defined(__i386__) || defined(__x86_64__)

# define BOOST_ENDIAN_NATIVE_ORDER_INITIALIZER little

#else

# error The Boost.Endian library could not determine the endianness of this platform.

#endif

namespace boost
{
namespace endian
{

enum class order
{
    big,
    little,
    native = BOOST_ENDIAN_NATIVE_ORDER_INITIALIZER
};

} // namespace endian
} // namespace boost

#undef BOOST_ENDIAN_NATIVE_ORDER_INITIALIZER

#endif  // BOOST_ENDIAN_DETAIL_ORDER_HPP_INCLUDED