From 0ddbe8c3a7292f1ed8dc2ecfdf4c0c38d78582d4 Mon Sep 17 00:00:00 2001 From: Caleb Epstein Date: Tue, 14 Jun 2005 22:19:20 +0000 Subject: [PATCH] Machine endianness detection taken from [SVN r29573] --- include/boost/detail/endian.hpp | 56 +++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 include/boost/detail/endian.hpp diff --git a/include/boost/detail/endian.hpp b/include/boost/detail/endian.hpp new file mode 100644 index 0000000..9017e76 --- /dev/null +++ b/include/boost/detail/endian.hpp @@ -0,0 +1,56 @@ +/* + * Copyright (c) 1997 + * Silicon Graphics Computer Systems, Inc. + * + * Permission to use, copy, modify, distribute and sell this software + * and its documentation for any purpose is hereby granted without fee, + * provided that the above copyright notice appear in all copies and + * that both that copyright notice and this permission notice appear + * in supporting documentation. Silicon Graphics makes no + * representations about the suitability of this software for any + * purpose. It is provided "as is" without express or implied warranty. + */ + +/* + * Copyright notice reproduced from , from + * which this code was originally taken. + * + * Modified by Caleb Epstein to use with GNU libc and to + * defined the BOOST_ENDIAN macro. + */ + +#ifndef BOOST_DETAIL_ENDIAN_HPP +#define BOOST_DETAIL_ENDIAN_HPP + +// GNU libc offers the helpful header which defines +// __BYTE_ORDER + +#if defined (__GLIBC__) +# include +# if (__BYTE_ORDER == __LITTLE_ENDIAN) +# define BOOST_LITTLE_ENDIAN +# elif (__BYTE_ORDER == __BIG_ENDIAN) +# define BOOST_BIG_ENDIAN +# elif (__BYTE_ORDER == __PDP_ENDIAN) +# define BOOST_PDP_ENDIAN +# else +# error Unknown machine endianness detected. +# endif +# define BOOST_BYTE_ORDER __BYTE_ORDER +#elif defined(__sparc) || defined(__sparc__) \ + || defined(_POWER) || defined(__powerpc__) \ + || defined(__ppc__) || defined(__hppa) \ + || defined(_MIPSEB) || defined(_POWER) \ + || defined(__s390__) +# define BOOST_BIG_ENDIAN +# define BOOST_BYTE_ORDER 4321 +#elif defined(__i386__) || defined(__alpha__) \ + || defined(__ia64) || defined(__ia64__) +# define BOOST_LITTLE_ENDIAN +# define BOOST_BYTE_ORDER 1234 +#else +# error The file boost/detail/endian.hpp needs to be set up for your CPU type. +#endif + + +#endif