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/*
* Copyright (c) Christoph Hellwig, 2002
*
* This program 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _H_JFS_BYTEORDER
#define _H_JFS_BYTEORDER
#if HAVE_SYS_BYTEORDER_H
# include <sys/byteorder.h>
#elif HAVE_MACHINE_ENDIAN_H
# include <machine/endian.h>
#elif HAVE_ENDIAN_H
# include <endian.h>
#endif
#define __swab16(x) \
({ \
uint16_t __x = (x); \
((uint16_t)( \
(((uint16_t)(__x) & (uint16_t)0x00ffU) << 8) | \
(((uint16_t)(__x) & (uint16_t)0xff00U) >> 8) )); \
})
#define __swab24(x) \
({ \
uint32_t __x = (x); \
((uint32_t)( \
((__x & (uint32_t)0x000000ffUL) << 16) | \
(__x & (uint32_t)0x0000ff00UL) | \
((__x & (uint32_t)0x00ff0000UL) >> 16) )); \
})
#define __swab32(x) \
({ \
uint32_t __x = (x); \
((uint32_t)( \
(((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \
(((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \
(((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \
(((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) )); \
})
#define __swab64(x) \
({ \
uint64_t __x = (x); \
((uint64_t)( \
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000000000ffULL) << 56) | \
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000000000ff00ULL) << 40) | \
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000000000ff0000ULL) << 24) | \
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000ff000000ULL) << 8) | \
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000ff00000000ULL) >> 8) | \
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000ff0000000000ULL) >> 24) | \
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x00ff000000000000ULL) >> 40) | \
(uint64_t)(((uint64_t)(__x) & (uint64_t)0xff00000000000000ULL) >> 56) )); \
})
#if (BYTE_ORDER == LITTLE_ENDIAN)
#define __cpu_to_le16(x) ((uint16_t)(x))
#define __cpu_to_le24(x) ((uint32_t)(x))
#define __cpu_to_le32(x) ((uint32_t)(x))
#define __cpu_to_le64(x) ((uint64_t)(x))
#define __le16_to_cpu(x) ((uint16_t)(x))
#define __le24_to_cpu(x) ((uint32_t)(x))
#define __le32_to_cpu(x) ((uint32_t)(x))
#define __le64_to_cpu(x) ((uint64_t)(x))
#elif (BYTE_ORDER == BIG_ENDIAN)
#define __cpu_to_le16(x) __swab16(x)
#define __cpu_to_le24(x) __swab24(x)
#define __cpu_to_le32(x) __swab32(x)
#define __cpu_to_le64(x) __swab64(x)
#define __le16_to_cpu(x) __swab16(x)
#define __le24_to_cpu(x) __swab24(x)
#define __le32_to_cpu(x) __swab32(x)
#define __le64_to_cpu(x) __swab64(x)
#else
# error "JFS works only on big- or littleendian machines"
#endif
#endif /* !_H_JFS_BYTEORDER */
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