110 lines
3.3 KiB
C
110 lines
3.3 KiB
C
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/*
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* Software License Agreement (BSD License)
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*
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* Point Cloud Library (PCL) - www.pointclouds.org
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* Copyright (c) 2007-2012, Ares Lagae
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* Copyright (c) 2012, Willow Garage, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of the copyright holder(s) nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id$
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*
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*/
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#pragma once
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#include <boost/predef/other/endian.h>
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#include <cstddef>
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#include <utility> // for swap
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namespace pcl
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{
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namespace io
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{
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namespace ply
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{
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/** \file byte_order.h
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* defines byte shift operations and endianness.
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* \author Ares Lagae as part of libply, Nizar Sallem
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* \ingroup io
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*/
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enum byte_order
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{
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little_endian_byte_order,
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big_endian_byte_order,
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#if BOOST_ENDIAN_BIG_BYTE
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host_byte_order = big_endian_byte_order,
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#elif BOOST_ENDIAN_LITTLE_BYTE
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host_byte_order = little_endian_byte_order,
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#else
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#error "unable to determine system endianness"
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#endif
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network_byte_order = big_endian_byte_order
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};
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template <std::size_t N>
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void swap_byte_order (char* bytes);
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template <>
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inline void swap_byte_order<1> (char*) {}
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template <>
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inline void swap_byte_order<2> (char* bytes)
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{
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std::swap (bytes[0], bytes[1]);
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}
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template <>
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inline void swap_byte_order<4> (char* bytes)
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{
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std::swap (bytes[0], bytes[3]);
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std::swap (bytes[1], bytes[2]);
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}
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template <>
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inline void swap_byte_order<8> (char* bytes)
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{
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std::swap (bytes[0], bytes[7]);
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std::swap (bytes[1], bytes[6]);
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std::swap (bytes[2], bytes[5]);
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std::swap (bytes[3], bytes[4]);
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}
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template <typename T>
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void swap_byte_order (T& value)
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{
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swap_byte_order<sizeof (T)> (reinterpret_cast<char*> (&value));
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}
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} // namespace ply
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} // namespace io
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} // namespace pcl
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