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      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 */
     73