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54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
/*
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* Copyright (C) 2001 Sistina Software (UK) Limited.
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*
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* This file is released under the GPL.
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*
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*/
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#ifndef _LVM_XLATE_H
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#define _LVM_XLATE_H
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#include <stdlib.h>
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#include <stdint.h>
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#if __BYTE_ORDER == __BIG_ENDIAN
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static inline uint16_t swab16(uint16_t x)
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{
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return (x & 0x00ffU) << 8 |
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(x & 0xff00U) >> 8;
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}
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static inline uint32_t swab32(uint32_t x)
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{
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return (x & 0x000000ffU) << 24 |
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(x & 0x0000ff00U) << 8 |
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(x & 0x00ff0000U) >> 8 |
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(x & 0xff000000U) >> 24;
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}
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static inline uint64_t swab64(uint64_t x)
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{
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return (x & 0x00000000000000ffULL) << 56 |
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(x & 0x000000000000ff00ULL) << 40 |
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(x & 0x0000000000ff0000ULL) << 24 |
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(x & 0x00000000ff000000ULL) << 8 |
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(x & 0x000000ff00000000ULL) >> 8 |
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(x & 0x0000ff0000000000ULL) >> 24 |
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(x & 0x00ff000000000000ULL) >> 40 |
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(x & 0xff00000000000000ULL) >> 56;
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}
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# define xlate16(x) swab16((x))
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# define xlate32(x) swab32((x))
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# define xlate64(x) swab64((x))
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#elif __BYTE_ORDER == __LITTLE_ENDIAN
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# define xlate16(x) (x)
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# define xlate32(x) (x)
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# define xlate64(x) (x)
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#else
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# error "__BYTE_ORDER must be defined as __LITTLE_ENDIAN or __BIG_ENDIAN"
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#endif
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#endif
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