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Added a BFS special endian header.

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git-svn-id: file:///srv/svn/repos/haiku/trunk/current@4615 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler
2003-09-11 01:34:38 +00:00
parent bd75d5b8cf
commit eb03840af1
1 changed files with 46 additions and 0 deletions
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src/add-ons/kernel/file_systems/bfs/bfs_endian.h
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/*
** Copyright 2003, Axel Dörfler, [email protected]. All rights reserved.
** Distributed under the terms of the OpenBeOS License.
*/
#ifndef BFS_ENDIAN_H
#define BFS_ENDIAN_H
#include <ByteOrder.h>
#if !defined(BFS_LITTLE_ENDIAN_ONLY) && !defined(BFS_BIG_ENDIAN_ONLY)
// default setting; BFS is now primarily a little endian file system
# define BFS_LITTLE_ENDIAN_ONLY
#endif
#ifdef BFS_LITTLE_ENDIAN_ONLY
# if B_HOST_IS_LENDIAN
# define BFS_ENDIAN_TO_HOST_INT16(value) value
# define BFS_ENDIAN_TO_HOST_INT32(value) value
# define BFS_ENDIAN_TO_HOST_INT64(value) value
# else
# define BFS_ENDIAN_TO_HOST_INT16(value) __swap_int16(value)
# define BFS_ENDIAN_TO_HOST_INT16(value) __swap_int32(value)
# define BFS_ENDIAN_TO_HOST_INT16(value) __swap_int64(value)
# endif
#elif BFS_BIG_ENDIAN_ONLY
# if B_HOST_IS_BENDIAN
# define BFS_ENDIAN_TO_HOST_INT16(value) value
# define BFS_ENDIAN_TO_HOST_INT32(value) value
# define BFS_ENDIAN_TO_HOST_INT64(value) value
# else
# define BFS_ENDIAN_TO_HOST_INT16(value) __swap_int16(value)
# define BFS_ENDIAN_TO_HOST_INT16(value) __swap_int32(value)
# define BFS_ENDIAN_TO_HOST_INT16(value) __swap_int64(value)
# endif
#else
// ToDo: maybe build a version that supports both, big & little endian?
// But since that will need some kind of global data (to
// know of what type this file system is), it's probably
// something for the boot loader; anything else would be
// a major pain.
#endif
#endif /* BFS_ENDIAN_H */