/usr/include/liblas/detail/endian.hpp is in liblas-dev 1.8.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* $Id$
*
* Project: libLAS - http://liblas.org - A BSD library for LAS format data.
* Purpose: Endian macros
* Author: Mateusz Loskot, mateusz@loskot.net
*
* This file has been stolen from <boost/endian.hpp> and
* modified for libLAS purposes.
*
* (C) Copyright Mateusz Loskot 2007, mateusz@loskot.net
* (C) Copyright Caleb Epstein 2005
* (C) Copyright John Maddock 2006
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE_1_0.txt or copy at
* http://www.boost.org/LICENSE_1_0.txt)
*
* Revision History
* 06 Feb 2006 - Initial Revision
* 09 Nov 2006 - fixed variant and version bits for v4 guids
* 13 Nov 2006 - added serialization
* 17 Nov 2006 - added name-based guid creation
* 20 Nov 2006 - add fixes for gcc (from Tim Blechmann)
* 07 Mar 2007 - converted to header only
* 20 Jan 2008 - removed dependency of Boost and modified for libLAS (by Mateusz Loskot)
******************************************************************************
*
* 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 <boost/detail/limits.hpp>, from
* which this code was originally taken.
*
* Modified by Caleb Epstein to use <endian.h> with GNU libc and to
* defined the BOOST_ENDIAN macro.
****************************************************************************/
#ifndef LIBLAS_DETAIL_ENDIAN_HPP_INCLUDED
#define LIBLAS_DETAIL_ENDIAN_HPP_INCLUDED
// GNU libc offers the helpful header <endian.h> which defines
// __BYTE_ORDER
#if defined (__GLIBC__)
# include <endian.h>
# if (__BYTE_ORDER == __LITTLE_ENDIAN)
# define LIBLAS_LITTLE_ENDIAN
# elif (__BYTE_ORDER == __BIG_ENDIAN)
# define LIBLAS_BIG_ENDIAN
# elif (__BYTE_ORDER == __PDP_ENDIAN)
# define LIBLAS_PDP_ENDIAN
# else
# error Unknown machine endianness detected.
# endif
# define LIBLAS_BYTE_ORDER __BYTE_ORDER
#elif defined(_BIG_ENDIAN)
# define LIBLAS_BIG_ENDIAN
# define LIBLAS_BYTE_ORDER 4321
#elif defined(_LITTLE_ENDIAN)
# define LIBLAS_LITTLE_ENDIAN
# define LIBLAS_BYTE_ORDER 1234
// If they're both defined, we're assuming little for now. See http://liblas.org/ticket/133
#elif defined(_LITTLE_ENDIAN) && defined(_BIG_ENDIAN)
# define LIBLAS_LITTLE_ENDIAN
# define LIBLAS_BYTE_ORDER 1234
#elif defined(__sparc) || defined(__sparc__) \
|| defined(_POWER) || defined(__powerpc__) \
|| defined(__ppc__) || defined(__hpux) \
|| defined(_MIPSEB) || defined(_POWER) \
|| defined(__s390__)
# define LIBLAS_BIG_ENDIAN
# define LIBLAS_BYTE_ORDER 4321
#elif defined(__i386__) || defined(__alpha__) \
|| defined(__ia64) || defined(__ia64__) \
|| defined(_M_IX86) || defined(_M_IA64) \
|| defined(_M_ALPHA) || defined(__amd64) \
|| defined(__amd64__) || defined(_M_AMD64) \
|| defined(__x86_64) || defined(__x86_64__) \
|| defined(_M_X64)
# define LIBLAS_LITTLE_ENDIAN
# define LIBLAS_BYTE_ORDER 1234
#else
# error The file liblas/detail/endian.hpp needs to be set up for your CPU type.
#endif
#if defined(LIBLAS_BIG_ENDIAN)
# define LIBLAS_SWAP_BYTES(p) \
do { \
char* first = static_cast<char*>(static_cast<void*>(&p)); \
char* last = first + sizeof(p) - 1; \
for(; first < last; ++first, --last) { \
char const x = *last; \
*last = *first; \
*first = x; \
}} while(false)
# define LIBLAS_SWAP_BYTES_N(p, n) \
do { \
char* first = static_cast<char*>(static_cast<void*>(&p)); \
char* last = first + n - 1; \
for(; first < last; ++first, --last) { \
char const x = *last; \
*last = *first; \
*first = x; \
}} while(false)
#else
# define LIBLAS_SWAP_BYTES(p) do {} while(false)
# define LIBLAS_SWAP_BYTES_N(p, n) do {} while(false)
#endif // LIBLAS_BIG_ENDIAN
#endif // LIBLAS_DETAIL_ENDIAN_HPP_INCLUDED
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