mirror of
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65 lines
2.1 KiB
C
65 lines
2.1 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _LVM_XLATE_H
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#define _LVM_XLATE_H
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#ifdef __linux__
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# include <endian.h>
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# include <byteswap.h>
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#else
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# include <machine/endian.h>
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# define bswap_16(x) (((x) & 0x00ffU) << 8 | \
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((x) & 0xff00U) >> 8)
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# define bswap_32(x) (((x) & 0x000000ffU) << 24 | \
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((x) & 0xff000000U) >> 24 | \
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((x) & 0x0000ff00U) << 8 | \
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((x) & 0x00ff0000U) >> 8)
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# define bswap_64(x) (((x) & 0x00000000000000ffULL) << 56 | \
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((x) & 0xff00000000000000ULL) >> 56 | \
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((x) & 0x000000000000ff00ULL) << 40 | \
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((x) & 0x00ff000000000000ULL) >> 40 | \
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((x) & 0x0000000000ff0000ULL) << 24 | \
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((x) & 0x0000ff0000000000ULL) >> 24 | \
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((x) & 0x00000000ff000000ULL) << 8 | \
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((x) & 0x000000ff00000000ULL) >> 8)
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#endif
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#if 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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# define xlate16_be(x) bswap_16(x)
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# define xlate32_be(x) bswap_32(x)
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# define xlate64_be(x) bswap_64(x)
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#elif BYTE_ORDER == BIG_ENDIAN
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# define xlate16(x) bswap_16(x)
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# define xlate32(x) bswap_32(x)
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# define xlate64(x) bswap_64(x)
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# define xlate16_be(x) (x)
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# define xlate32_be(x) (x)
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# define xlate64_be(x) (x)
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#else
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# include <asm/byteorder.h>
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# define xlate16(x) __cpu_to_le16((x))
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# define xlate32(x) __cpu_to_le32((x))
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# define xlate64(x) __cpu_to_le64((x))
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# define xlate16_be(x) __cpu_to_be16((x))
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# define xlate32_be(x) __cpu_to_be32((x))
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# define xlate64_be(x) __cpu_to_be64((x))
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#endif
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#endif
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