1#ifndef BOOST_ENDIAN_DETAIL_ORDER_HPP_INCLUDED
2#define BOOST_ENDIAN_DETAIL_ORDER_HPP_INCLUDED
3
4// Copyright 2019 Peter Dimov
5//
6// Distributed under the Boost Software License, Version 1.0.
7// http://www.boost.org/LICENSE_1_0.txt
8
9#if defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
10
11# define BOOST_ENDIAN_NATIVE_ORDER_INITIALIZER little
12
13#elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
14
15# define BOOST_ENDIAN_NATIVE_ORDER_INITIALIZER big
16
17#elif defined(__BYTE_ORDER__) && defined(__ORDER_PDP_ENDIAN__) && __BYTE_ORDER__ == __ORDER_PDP_ENDIAN__
18
19# error The Boost.Endian library does not support platforms with PDP endianness.
20
21#elif defined(__LITTLE_ENDIAN__)
22
23# define BOOST_ENDIAN_NATIVE_ORDER_INITIALIZER little
24
25#elif defined(__BIG_ENDIAN__)
26
27# define BOOST_ENDIAN_NATIVE_ORDER_INITIALIZER big
28
29#elif defined(_MSC_VER) || defined(__i386__) || defined(__x86_64__)
30
31# define BOOST_ENDIAN_NATIVE_ORDER_INITIALIZER little
32
33#else
34
35# error The Boost.Endian library could not determine the endianness of this platform.
36
37#endif
38
39namespace boost
40{
41namespace endian
42{
43
44enum class order
45{
46 big,
47 little,
48 native = BOOST_ENDIAN_NATIVE_ORDER_INITIALIZER
49};
50
51} // namespace endian
52} // namespace boost
53
54#undef BOOST_ENDIAN_NATIVE_ORDER_INITIALIZER
55
56#endif // BOOST_ENDIAN_DETAIL_ORDER_HPP_INCLUDED
57

source code of boost/libs/endian/include/boost/endian/detail/order.hpp