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/*
* This file has been modified for the cdrkit suite.
*
* The behaviour and appearence of the program code below can differ to a major
* extent from the version distributed by the original author(s).
*
* For details, see Changelog file distributed with the cdrkit package. If you
* received this file from another source then ask the distributing person for
* a log of modifications.
*
*/
/* @(#)bswap.h 1.2 03/03/25 Copyright 2002 J. Schilling */
#ifndef _BSWAP_H
#define _BSWAP_H
/*
* Allow to use B2N_* macros found in libdvdread in a portable way.
* These macros should better be avoided as in place conversion in
* general only works on processors like Motorola 68000 and Intel x86.
* Modern processors usually have alignement restrictions that may
* cause problems. The stripped down libdvdread for genisoimage is known
* not to have these alignement problems, so we may use the macros
* as they have been introduced by the authors of libdvdread.
*
* Copyright (c) 2002 J. Schilling
*/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; see the file COPYING. If not, write to the Free Software
* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <mconfig.h>
#include <btorder.h>
#include <intcvt.h>
#if defined(WORDS_BIGENDIAN)
/* All bigendian systems are fine, just ignore the swaps. */
#define B2N_16(x) (void)(x)
#define B2N_32(x) (void)(x)
#define B2N_64(x) (void)(x)
#else
/*
* It is a bad idea to convert numbers in place.
* In protocols, there is usually the additional problem that the
* data is not properly aligned.
*/
#define B2N_16(x) (x) = a_to_u_2_byte(&(x))
#define B2N_32(x) (x) = a_to_u_4_byte(&(x))
#define B2N_64(x) (x) = a_to_u_8_byte(&(x))
#endif
#endif /* _BSWAP_H */
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