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lvm2/lib/mm/xlate.h

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2001-10-08 13:45:16 +04:00
/*
* Copyright (C) 2001 Sistina Software (UK) Limited.
*
* This file is released under the GPL.
*
*/
#ifndef _LVM_XLATE_H
#define _LVM_XLATE_H
/* FIXME: finish these as inlines */
uint16_t shuffle16(uint16_t n);
uint32_t shuffle32(uint32_t n);
uint64_t shuffle64(uint64_t n);
/* xlate functions move data between core and disk */
#if __BYTE_ORDER == __BIG_ENDIAN
# define xlate16(x) shuffle16(x)
# define xlate32(x) shuffle32(x)
# define xlate64(x) shuffle64(x)
#elif __BYTE_ORDER == __LITTLE_ENDIAN
# define xlate16(x) (x)
# define xlate32(x) (x)
# define xlate64(x) (x)
#else
# error "__BYTE_ORDER must be defined as __LITTLE_ENDIAN or __BIG_ENDIAN"
#endif
#endif