/usr/include/ebml/EbmlEndian.h is in libebml-dev 1.3.5-2.
This file is owned by root:root, with mode 0o644.
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** libebml : parse EBML files, see http://embl.sourceforge.net/
**
** <file/class description>
**
** Copyright (C) 2002-2010 Steve Lhomme. All rights reserved.
**
** This file is part of libebml.
**
** This library is free software; you can redistribute it and/or
** modify it under the terms of the GNU Lesser General Public
** License as published by the Free Software Foundation; either
** version 2.1 of the License, or (at your option) any later version.
**
** This library is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
** Lesser General Public License for more details.
**
** You should have received a copy of the GNU Lesser General Public
** License along with this library; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
**
** See http://www.gnu.org/licenses/lgpl-2.1.html for LGPL licensing information.
**
** Contact license@matroska.org if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/
/*!
\file
\version \$Id: EbmlEndian.h 1298 2008-02-21 22:14:18Z mosu $
\author Ingo Ralf Blum <ingoralfblum @ users.sf.net>
\author Lasse Kärkkäinen <tronic @ users.sf.net>
\author Steve Lhomme <robux4 @ users.sf.net>
*/
#ifndef LIBEBML_ENDIAN_H
#define LIBEBML_ENDIAN_H
#include <algorithm>
#include <cstring>
#include "EbmlConfig.h" // contains _ENDIANESS_
START_LIBEBML_NAMESPACE
enum endianess {
big_endian, ///< PowerPC, Alpha, 68000
little_endian ///< Intel x86 platforms
};
/*!
\class Endian
\brief general class to handle endian-specific buffers
\note don't forget to define/undefine _ENDIANESS_ to BIG_ENDIAN depending on your machine
*/
template<class TYPE, endianess ENDIAN> class Endian
{
public:
Endian() {}
Endian(const TYPE value)
{
memcpy(&platform_value, &value, sizeof(TYPE));
process_endian();
}
inline Endian & Eval(const binary *endian_buffer)
{
//endian_value = *(TYPE *)(endian_buffer);
memcpy(&endian_value, endian_buffer, sizeof(TYPE)); // Some (all?) RISC processors do not allow reading objects bigger than 1 byte from non-aligned addresses, and endian_buffer may point to a non-aligned address.
process_platform();
return *this;
}
inline void Fill(binary *endian_buffer) const
{
//*(TYPE*)endian_buffer = endian_value;
memcpy(endian_buffer, &endian_value, sizeof(TYPE)); // See above.
}
inline operator const TYPE&() const { return platform_value; }
// inline TYPE endian() const { return endian_value; }
inline const TYPE &endian() const { return endian_value; }
inline size_t size() const { return sizeof(TYPE); }
inline bool operator!=(const binary *buffer) const {return *((TYPE*)buffer) == platform_value;}
#if defined(EBML_STRICT_API)
private:
#else
protected:
#endif
TYPE platform_value;
TYPE endian_value;
inline void process_endian()
{
endian_value = platform_value;
#ifdef WORDS_BIGENDIAN
if (ENDIAN == little_endian)
#else // _ENDIANESS_
if (ENDIAN == big_endian)
#endif // _ENDIANESS_
std::reverse(reinterpret_cast<uint8*>(&endian_value),reinterpret_cast<uint8*>(&endian_value+1));
}
inline void process_platform()
{
platform_value = endian_value;
#ifdef WORDS_BIGENDIAN
if (ENDIAN == little_endian)
#else // _ENDIANESS_
if (ENDIAN == big_endian)
#endif // _ENDIANESS_
std::reverse(reinterpret_cast<uint8*>(&platform_value),reinterpret_cast<uint8*>(&platform_value+1));
}
};
END_LIBEBML_NAMESPACE
#endif // LIBEBML_ENDIAN_H
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