external/gpl2/lvm2/dist/include/xlate.h

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
   5  * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
   6  *
   7  * This file is part of LVM2.
   8  *
   9  * This copyrighted material is made available to anyone wishing to use,
  10  * modify, copy, or redistribute it subject to the terms and conditions
  11  * of the GNU Lesser General Public License v.2.1.
  12  *
  13  * You should have received a copy of the GNU Lesser General Public License
  14  * along with this program; if not, write to the Free Software Foundation,
  15  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  16  */
  17
  18 #ifndef _LVM_XLATE_H
  19 #define _LVM_XLATE_H
  20
  21 #ifdef linux
  22 #  include <endian.h>
  23 #  include <byteswap.h>
  24 #else
  25 #  include <machine/endian.h>
  26 #  define bswap_16(x) (((x) & 0x00ffU) << 8 | \
  27                        ((x) & 0xff00U) >> 8)
  28 #  define bswap_32(x) (((x) & 0x000000ffU) << 24 | \
  29                        ((x) & 0xff000000U) >> 24 | \
  30                        ((x) & 0x0000ff00U) << 8  | \
  31                        ((x) & 0x00ff0000U) >> 8)
  32 #  define bswap_64(x) (((x) & 0x00000000000000ffULL) << 56 | \
  33                        ((x) & 0xff00000000000000ULL) >> 56 | \
  34                        ((x) & 0x000000000000ff00ULL) << 40 | \
  35                        ((x) & 0x00ff000000000000ULL) >> 40 | \
  36                        ((x) & 0x0000000000ff0000ULL) << 24 | \
  37                        ((x) & 0x0000ff0000000000ULL) >> 24 | \
  38                        ((x) & 0x00000000ff000000ULL) << 8 | \
  39                        ((x) & 0x000000ff00000000ULL) >> 8)
  40 #endif
  41
  42 #if BYTE_ORDER == LITTLE_ENDIAN
  43 #  define xlate16(x) (x)
  44 #  define xlate32(x) (x)
  45 #  define xlate64(x) (x)
  46 #  define xlate16_be(x) bswap_16(x)
  47 #  define xlate32_be(x) bswap_32(x)
  48 #  define xlate64_be(x) bswap_64(x)
  49 #elif BYTE_ORDER == BIG_ENDIAN
  50 #  define xlate16(x) bswap_16(x)
  51 #  define xlate32(x) bswap_32(x)
  52 #  define xlate64(x) bswap_64(x)
  53 #  define xlate16_be(x) (x)
  54 #  define xlate32_be(x) (x)
  55 #  define xlate64_be(x) (x)
  56 #else
  57 #  include <asm/byteorder.h>
  58 #  define xlate16(x) __cpu_to_le16((x))
  59 #  define xlate32(x) __cpu_to_le32((x))
  60 #  define xlate64(x) __cpu_to_le64((x))
  61 #  define xlate16_be(x) __cpu_to_be16((x))
  62 #  define xlate32_be(x) __cpu_to_be32((x))
  63 #  define xlate64_be(x) __cpu_to_be64((x))
  64 #endif
  65
  66 #endif