corosync  2.3.5-dirty
swab.h
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1 /*
2  * Copyright (c) 2005 MontaVista Software, Inc.
3  * Copyright (c) 2006-2008 Red Hat, Inc.
4  *
5  * All rights reserved.
6  *
7  * This software licensed under BSD license, the text of which follows:
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions are met:
11  *
12  * - Redistributions of source code must retain the above copyright notice,
13  * this list of conditions and the following disclaimer.
14  * - Redistributions in binary form must reproduce the above copyright notice,
15  * this list of conditions and the following disclaimer in the documentation
16  * and/or other materials provided with the distribution.
17  * - Neither the name of the MontaVista Software, Inc. nor the names of its
18  * contributors may be used to endorse or promote products derived from this
19  * software without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
25  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
31  * THE POSSIBILITY OF SUCH DAMAGE.
32  */
33 #include <sys/types.h>
34 
35 #define swab16(x) \
36 ({ \
37  uint16_t __x = (x); \
38  ((uint16_t)( \
39  (((uint16_t)(__x) & (uint16_t)0x00ffU) << 8) | \
40  (((uint16_t)(__x) & (uint16_t)0xff00U) >> 8) )); \
41 })
42 
43 #define swab32(x) \
44 ({ \
45  uint32_t __x = (x); \
46  ((uint32_t)( \
47  (((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \
48  (((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \
49  (((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \
50  (((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) )); \
51 })
52 #define swab64(x) \
53 ({ \
54  uint64_t __x = (x); \
55  ((uint64_t)( \
56  (uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000000000ffULL) << 56) | \
57  (uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000000000ff00ULL) << 40) | \
58  (uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000000000ff0000ULL) << 24) | \
59  (uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000ff000000ULL) << 8) | \
60  (uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000ff00000000ULL) >> 8) | \
61  (uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000ff0000000000ULL) >> 24) | \
62  (uint64_t)(((uint64_t)(__x) & (uint64_t)0x00ff000000000000ULL) >> 40) | \
63  (uint64_t)(((uint64_t)(__x) & (uint64_t)0xff00000000000000ULL) >> 56) )); \
64 })