usr/src/cmd/cdrw/byteorder.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2001 by Sun Microsystems, Inc.
  24  * All rights reserved.
  25  */
  26
  27 #ifndef _BYTEORDER_H
  28 #define _BYTEORDER_H
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #ifdef  __cplusplus
  33 extern "C" {
  34 #endif
  35
  36 #include <sys/types.h>
  37
  38 #define swap32(x) \
  39 ((uint32_t)((((uint32_t)(x) & 0x000000ff) << 24) | \
  40 (((uint32_t)(x) & 0x0000ff00) << 8) | \
  41 (((uint32_t)(x) & 0x00ff0000) >> 8) | \
  42 (((uint32_t)(x) & 0xff000000) >> 24)))
  43
  44 #define swap16(x) \
  45 ((uint16_t)((((uint16_t)(x) & 0x00ff) << 8) | \
  46 (((uint16_t)(x) & 0xff00) >> 8)))
  47
  48 /*
  49  * endianess issues
  50  */
  51 #if defined(_BIG_ENDIAN)
  52 #define CPU_TO_LE32(x)  swap32(x)
  53 #define CPU_TO_LE16(x)  swap16(x)
  54 #define CPU_TO_BE32(x)  (x)
  55 #define CPU_TO_BE16(x)  (x)
  56 #else
  57 #define CPU_TO_LE32(x)  (x)
  58 #define CPU_TO_LE16(x)  (x)
  59 #define CPU_TO_BE32(x)  swap32(x)
  60 #define CPU_TO_BE16(x)  swap16(x)
  61 #endif
  62
  63 #define LE32_TO_CPU(x)  CPU_TO_LE32(x)
  64 #define LE16_TO_CPU(x)  CPU_TO_LE16(x)
  65 #define BE32_TO_CPU(x)  CPU_TO_BE32(x)
  66 #define BE16_TO_CPU(x)  CPU_TO_BE16(x)
  67
  68 #ifdef  __cplusplus
  69 }
  70 #endif
  71
  72 #endif /* _BYTEORDER_H */