source: lib/lt_bswap.h @ 756b8f9

4.0.1-hotfixescachetimestampsdevelopdpdk-ndagetsilivelibtrace4ndag_formatpfringrc-4.0.1rc-4.0.2rc-4.0.3rc-4.0.4ringdecrementfixringperformanceringtimestampfixes
Last change on this file since 756b8f9 was d8b05b7, checked in by Shane Alcock <salcock@…>, 6 years ago

Make sure our copyright covers recent years

Consistency across all of our source files is also nice.

  • Property mode set to 100644
File size: 3.3 KB
Line 
1/*
2 * This file is part of libtrace
3 *
4 * Copyright (c) 2007-2015 The University of Waikato, Hamilton,
5 * New Zealand.
6 *
7 * Authors: Daniel Lawson
8 *          Perry Lorier
9 *          Shane Alcock
10 *         
11 * All rights reserved.
12 *
13 * This code has been developed by the University of Waikato WAND
14 * research group. For further information please see http://www.wand.net.nz/
15 *
16 * libtrace is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
20 *
21 * libtrace is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
24 * GNU General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with libtrace; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
29 *
30 * $Id: libtrace_int.h 1848 2013-08-02 06:19:52Z rjs51 $
31 *
32 */
33
34#include <arpa/inet.h>
35#include <inttypes.h>
36/** @file
37 *
38 * @brief Header file containing definitions of functions and macros that deal
39 * with byteswapping within libtrace and libpacketdump.
40 *
41 * @author Perry Lorier
42 * @author Shane Alcock
43 *
44 * @version $Id$
45 */
46
47#ifndef LT_BYTESWAP_H_
48#define LT_BYTESWAP_H_
49#ifdef __cplusplus
50extern "C" {
51#endif
52
53/** Byteswaps a 64-bit value.
54 *
55 * @param num           The value to be byteswapped.
56 * @return The byteswapped 64-bit number
57 *
58 */
59uint64_t byteswap64(uint64_t num);
60
61/** Byteswaps a 32-bit value.
62 *
63 * @param num           The value to be byteswapped.
64 * @return The byteswapped 32-bit number
65 *
66 */
67uint32_t byteswap32(uint32_t num);
68
69/** Byteswaps a 16-bit value.
70 *
71 * @param num           The value to be byteswapped.
72 * @return The byteswapped 16-bit number
73 *
74 */
75uint16_t byteswap16(uint16_t num);
76
77
78#if __BYTE_ORDER == __BIG_ENDIAN
79#define bswap_host_to_be64(num) ((uint64_t)(num))
80#define bswap_host_to_le64(num) byteswap64(num)
81#define bswap_host_to_be32(num) ((uint32_t)(num))
82#define bswap_host_to_le32(num) byteswap32(num)
83#define bswap_host_to_be16(num) ((uint16_t)(num))
84#define bswap_host_to_le16(num) byteswap16(num)
85
86#define bswap_be_to_host64(num) ((uint64_t)(num))
87#define bswap_le_to_host64(num) byteswap64(num)
88#define bswap_be_to_host32(num) ((uint32_t)(num))
89#define bswap_le_to_host32(num) byteswap32(num)
90#define bswap_be_to_host16(num) ((uint16_t)(num))
91#define bswap_le_to_host16(num) byteswap16(num)
92
93/* We use ntoh*() here, because the compiler may
94 * attempt to optimise it
95 */
96#elif __BYTE_ORDER == __LITTLE_ENDIAN
97#define bswap_host_to_be64(num) (byteswap64(num))
98#define bswap_host_to_le64(num) ((uint64_t)(num))
99#define bswap_host_to_be32(num) (htonl(num))
100#define bswap_host_to_le32(num) ((uint32_t)(num))
101#define bswap_host_to_be16(num) (htons(num))
102#define bswap_host_to_le16(num) ((uint16_t)(num))
103
104#define bswap_be_to_host64(num) (byteswap64(num))
105#define bswap_le_to_host64(num) ((uint64_t)(num))
106#define bswap_be_to_host32(num) (ntohl(num))
107#define bswap_le_to_host32(num) ((uint32_t)(num))
108#define bswap_be_to_host16(num) (ntohs(num))
109#define bswap_le_to_host16(num) ((uint16_t)(num))
110
111#else
112#error "Unknown byte order"
113#endif
114
115#ifdef __cplusplus
116}
117#endif
118
119#endif
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