François Revol
2522f69ee9
Change-Id: Ia7dd0046a2a527d9acbeb31b665d98f099642102 Reviewed-on: https://review.haiku-os.org/643 Reviewed-by: waddlesplash <[email protected]>
49 lines
1.8 KiB
C
49 lines
1.8 KiB
C
/*
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* Copyright 2003-2008, Axel Dörfler, [email protected].
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* Distributed under the terms of the MIT License.
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*/
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#ifndef BFS_ENDIAN_H
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#define BFS_ENDIAN_H
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#include "system_dependencies.h"
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#if !defined(BFS_LITTLE_ENDIAN_ONLY) && !defined(BFS_BIG_ENDIAN_ONLY)
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// default setting; BFS is now primarily a little endian file system
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# define BFS_LITTLE_ENDIAN_ONLY
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#endif
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#if defined(BFS_LITTLE_ENDIAN_ONLY) && defined(BFS_BIG_ENDIAN_ONLY)
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# error Building BFS with both big and little endian is not supported.
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#endif
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#if defined(BFS_LITTLE_ENDIAN_ONLY) && B_HOST_IS_LENDIAN \
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|| defined(BFS_BIG_ENDIAN_ONLY) && B_HOST_IS_BENDIAN
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/* host is BFS endian */
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# define BFS_NATIVE_ENDIAN
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# define BFS_ENDIAN_TO_HOST_INT16(value) value
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# define BFS_ENDIAN_TO_HOST_INT32(value) value
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# define BFS_ENDIAN_TO_HOST_INT64(value) value
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# define HOST_ENDIAN_TO_BFS_INT16(value) value
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# define HOST_ENDIAN_TO_BFS_INT32(value) value
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# define HOST_ENDIAN_TO_BFS_INT64(value) value
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#elif defined(BFS_LITTLE_ENDIAN_ONLY) && B_HOST_IS_BENDIAN \
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|| defined(BFS_BIG_ENDIAN_ONLY) && B_HOST_IS_LENDIAN
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/* host is big endian, BFS is little endian or vice versa */
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# define BFS_ENDIAN_TO_HOST_INT16(value) __swap_int16(value)
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# define BFS_ENDIAN_TO_HOST_INT32(value) __swap_int32(value)
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# define BFS_ENDIAN_TO_HOST_INT64(value) __swap_int64(value)
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# define HOST_ENDIAN_TO_BFS_INT16(value) __swap_int16(value)
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# define HOST_ENDIAN_TO_BFS_INT32(value) __swap_int32(value)
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# define HOST_ENDIAN_TO_BFS_INT64(value) __swap_int64(value)
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#else
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// TODO: maybe build a version that supports both, big & little endian?
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// But since that will need some kind of global data (to
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// know of what type this file system is), it's probably
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// something for the boot loader; anything else would be
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// a major pain.
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#endif
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#endif /* BFS_ENDIAN_H */
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