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49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
/*
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* Copyright (C) International Business Machines Corp., 2001
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _H_ENDIAN24
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#define _H_ENDIAN24
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/*
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* endian24.h:
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*
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* Endian conversion for 24-byte data
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*
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*/
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#define __swab24(x) \
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({ \
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__u32 __x = (x); \
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((__u32)( \
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((__x & (__u32)0x000000ffUL) << 16) | \
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(__x & (__u32)0x0000ff00UL) | \
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((__x & (__u32)0x00ff0000UL) >> 16) )); \
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})
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#if (defined(__KERNEL__) && defined(__LITTLE_ENDIAN)) || (defined(__BYTE_ORDER) && (__BYTE_ORDER == __LITTLE_ENDIAN))
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#define __cpu_to_le24(x) ((__u32)(x))
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#define __le24_to_cpu(x) ((__u32)(x))
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#else
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#define __cpu_to_le24(x) __swab24(x)
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#define __le24_to_cpu(x) __swab24(x)
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#endif
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#ifdef __KERNEL__
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#define cpu_to_le24 __cpu_to_le24
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#define le24_to_cpu __le24_to_cpu
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#endif
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#endif /* !_H_ENDIAN24 */
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