sys/fs/udf/udf_bswap.h

   1 /* $NetBSD: udf_bswap.h,v 1.7 2009/05/18 21:09:54 reinoud Exp $ */
   2
   3 /*
   4  * Copyright (c) 1998 Manuel Bouyer.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  *
  26  * adapted for UDF by Reinoud Zandijk <reinoud@netbsd.org>
  27  *
  28  */
  29
  30 #ifndef _FS_UDF_UDF_BSWAP_H_
  31 #define _FS_UDF_UDF_BSWAP_H_
  32
  33 #include <sys/endian.h>
  34 #include <machine/bswap.h>
  35 #include <sys/bswap.h>
  36
  37 /* rest only relevant for big endian machines */
  38 #if (BYTE_ORDER == BIG_ENDIAN)
  39
  40 /* inlines for access to swapped data */
  41 static __inline uint16_t udf_rw16(uint16_t);
  42 static __inline uint32_t udf_rw32(uint32_t);
  43 static __inline uint64_t udf_rw64(uint64_t);
  44
  45
  46 static __inline uint16_t
  47 udf_rw16(uint16_t a)
  48 {
  49         return bswap16(a);
  50 }
  51
  52
  53 static __inline uint32_t
  54 udf_rw32(uint32_t a)
  55 {
  56         return bswap32(a);
  57 }
  58
  59
  60 static __inline uint64_t
  61 udf_rw64(uint64_t a)
  62 {
  63         return bswap64(a);
  64 }
  65
  66 #else
  67
  68 #define udf_rw16(a) ((uint16_t)(a))
  69 #define udf_rw32(a) ((uint32_t)(a))
  70 #define udf_rw64(a) ((uint64_t)(a))
  71
  72 #endif
  73
  74
  75 #endif /* !_FS_UDF_UDF_BSWAP_H_ */
  76