include/sys/byteorder.h

   1 /*
   2  *  Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
   3  *  Copyright (C) 2007 The Regents of the University of California.
   4  *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
   5  *  Written by Brian Behlendorf <behlendorf1@llnl.gov>.
   6  *  UCRL-CODE-235197
   7  *
   8  *  This file is part of the SPL, Solaris Porting Layer.
   9  *  For details, see <http://zfsonlinux.org/>.
  10  *
  11  *  The SPL is free software; you can redistribute it and/or modify it
  12  *  under the terms of the GNU General Public License as published by the
  13  *  Free Software Foundation; either version 2 of the License, or (at your
  14  *  option) any later version.
  15  *
  16  *  The SPL is distributed in the hope that it will be useful, but WITHOUT
  17  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  18  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  19  *  for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License along
  22  *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
  23  */
  24
  25 #ifndef _SPL_BYTEORDER_H
  26 #define _SPL_BYTEORDER_H
  27
  28 #include <asm/byteorder.h>
  29 #include <sys/isa_defs.h>
  30
  31 #define LE_16(x)        cpu_to_le16(x)
  32 #define LE_32(x)        cpu_to_le32(x)
  33 #define LE_64(x)        cpu_to_le64(x)
  34 #define BE_16(x)        cpu_to_be16(x)
  35 #define BE_32(x)        cpu_to_be32(x)
  36 #define BE_64(x)        cpu_to_be64(x)
  37
  38 #define BE_IN8(xa) \
  39         *((uint8_t *)(xa))
  40
  41 #define BE_IN16(xa) \
  42         (((uint16_t)BE_IN8(xa) << 8) | BE_IN8((uint8_t *)(xa)+1))
  43
  44 #define BE_IN32(xa) \
  45         (((uint32_t)BE_IN16(xa) << 16) | BE_IN16((uint8_t *)(xa)+2))
  46
  47 #ifdef _BIG_ENDIAN
  48 static __inline__ uint64_t
  49 htonll(uint64_t n)
  50 {
  51         return (n);
  52 }
  53
  54 static __inline__ uint64_t
  55 ntohll(uint64_t n)
  56 {
  57         return (n);
  58 }
  59 #else
  60 static __inline__ uint64_t
  61 htonll(uint64_t n)
  62 {
  63         return ((((uint64_t)htonl(n)) << 32) + htonl(n >> 32));
  64 }
  65
  66 static __inline__ uint64_t
  67 ntohll(uint64_t n)
  68 {
  69         return ((((uint64_t)ntohl(n)) << 32) + ntohl(n >> 32));
  70 }
  71 #endif
  72
  73 #endif /* SPL_BYTEORDER_H */