/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */

/** @file endian_type.hpp Definition of various endian-dependant macros. */

#ifndef ENDIAN_TYPE_HPP
#define ENDIAN_TYPE_HPP

#if defined(ARM) || defined(__arm__) || defined(__alpha__)
	/** The architecture requires aligned access. */
	#define OTTD_ALIGNMENT 1
#else
	/** The architecture does not require aligned access. */
	#define OTTD_ALIGNMENT 0
#endif

/** Little endian builds use this for TTD_ENDIAN. */
#define TTD_LITTLE_ENDIAN 0
/** Big endian builds use this for TTD_ENDIAN. */
#define TTD_BIG_ENDIAN 1

/* Windows has always LITTLE_ENDIAN */
#if defined(_WIN32) || defined(__OS2__) || defined(__HAIKU__)
#	define TTD_ENDIAN TTD_LITTLE_ENDIAN
#elif defined(OSX)
#	include <sys/types.h>
#	if __DARWIN_BYTE_ORDER == __DARWIN_LITTLE_ENDIAN
#		define TTD_ENDIAN TTD_LITTLE_ENDIAN
#	else
#		define TTD_ENDIAN TTD_BIG_ENDIAN
#	endif
#elif defined(__OpenBSD__)
#	include <endian.h>
#	if BYTE_ORDER == LITTLE_ENDIAN
#		define TTD_ENDIAN TTD_LITTLE_ENDIAN
#	else
#		define TTD_ENDIAN TTD_BIG_ENDIAN
#	endif
#elif !defined(TESTING)
#	include <sys/param.h>
#	if __BYTE_ORDER == __LITTLE_ENDIAN
#		define TTD_ENDIAN TTD_LITTLE_ENDIAN
#	else
#		define TTD_ENDIAN TTD_BIG_ENDIAN
#	endif
#endif /* _WIN32 || __OS2__ */

#endif /* ENDIAN_TYPE_HPP */