cl_byteswap_osd.h revision 329564 
1/*
2 * Copyright (c) 2004, 2005 Voltaire, Inc. All rights reserved.
3 * Copyright (c) 2002-2005 Mellanox Technologies LTD. All rights reserved.
4 * Copyright (c) 1996-2003 Intel Corporation. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses.  You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 *     Redistribution and use in source and binary forms, with or
13 *     without modification, are permitted provided that the following
14 *     conditions are met:
15 *
16 *      - Redistributions of source code must retain the above
17 *        copyright notice, this list of conditions and the following
18 *        disclaimer.
19 *
20 *      - Redistributions in binary form must reproduce the above
21 *        copyright notice, this list of conditions and the following
22 *        disclaimer in the documentation and/or other materials
23 *        provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 *
34 */
35
36/*
37 * Abstract:
38 *	Provides common macros for dealing with byte swapping issues.
39 */
40
41#ifndef _CL_BYTESWAP_OSD_H_
42#define _CL_BYTESWAP_OSD_H_
43
44/*
45 * This provides defines __LITTLE_ENDIAN, __BIG_ENDIAN and __BYTE_ORDER
46 */
47#include <infiniband/endian.h>
48#include <infiniband/byteswap.h>
49
50#ifdef __cplusplus
51#  define BEGIN_C_DECLS extern "C" {
52#  define END_C_DECLS   }
53#else				/* !__cplusplus */
54#  define BEGIN_C_DECLS
55#  define END_C_DECLS
56#endif				/* __cplusplus */
57
58BEGIN_C_DECLS
59#if __BYTE_ORDER == __LITTLE_ENDIAN
60#define cl_ntoh16(x)	bswap_16(x)
61#define cl_hton16(x)	bswap_16(x)
62#define cl_ntoh32(x)	bswap_32(x)
63#define cl_hton32(x)	bswap_32(x)
64#define cl_ntoh64(x)	(uint64_t)bswap_64(x)
65#define cl_hton64(x)	(uint64_t)bswap_64(x)
66#else				/* Big Endian */
67#define cl_ntoh16(x)	(x)
68#define cl_hton16(x)	(x)
69#define cl_ntoh32(x)	(x)
70#define cl_hton32(x)	(x)
71#define cl_ntoh64(x)	(x)
72#define cl_hton64(x)	(x)
73#endif
74END_C_DECLS
75#endif				/* _CL_BYTESWAP_OSD_H_ */
76