source: lib/lt_bswap.h @ 0af3a4e

4.0.1-hotfixescachetimestampsdevelopdpdk-ndagetsilivendag_formatrc-4.0.1rc-4.0.2rc-4.0.3rc-4.0.4ringdecrementfixringperformanceringtimestampfixes
Last change on this file since 0af3a4e was ee6e802, checked in by Shane Alcock <salcock@…>, 5 years ago

Updated copyright blurb on all source files

In some cases, this meant adding copyright blurbs to files that
had never had them before.

  • Property mode set to 100644
File size: 3.2 KB
Line 
1/*
2 *
3 * Copyright (c) 2007-2016 The University of Waikato, Hamilton, New Zealand.
4 * All rights reserved.
5 *
6 * This file is part of libtrace.
7 *
8 * This code has been developed by the University of Waikato WAND
9 * research group. For further information please see http://www.wand.net.nz/
10 *
11 * libtrace is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU Lesser General Public License as published by
13 * the Free Software Foundation; either version 3 of the License, or
14 * (at your option) any later version.
15 *
16 * libtrace is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19 * GNU Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
23 *
24 *
25 */
26#include <arpa/inet.h>
27#include <inttypes.h>
28/** @file
29 *
30 * @brief Header file containing definitions of functions and macros that deal
31 * with byteswapping within libtrace and libpacketdump.
32 *
33 * @author Perry Lorier
34 * @author Shane Alcock
35 *
36 * @version $Id$
37 */
38
39#ifndef LT_BYTESWAP_H_
40#define LT_BYTESWAP_H_
41#ifdef __cplusplus
42extern "C" {
43#endif
44
45/** Byteswaps a 64-bit value.
46 *
47 * @param num           The value to be byteswapped.
48 * @return The byteswapped 64-bit number
49 *
50 */
51uint64_t byteswap64(uint64_t num);
52
53/** Byteswaps a 32-bit value.
54 *
55 * @param num           The value to be byteswapped.
56 * @return The byteswapped 32-bit number
57 *
58 */
59uint32_t byteswap32(uint32_t num);
60
61/** Byteswaps a 16-bit value.
62 *
63 * @param num           The value to be byteswapped.
64 * @return The byteswapped 16-bit number
65 *
66 */
67uint16_t byteswap16(uint16_t num);
68
69
70#if __BYTE_ORDER == __BIG_ENDIAN
71#define bswap_host_to_be64(num) ((uint64_t)(num))
72#define bswap_host_to_le64(num) byteswap64(num)
73#define bswap_host_to_be32(num) ((uint32_t)(num))
74#define bswap_host_to_le32(num) byteswap32(num)
75#define bswap_host_to_be16(num) ((uint16_t)(num))
76#define bswap_host_to_le16(num) byteswap16(num)
77
78#define bswap_be_to_host64(num) ((uint64_t)(num))
79#define bswap_le_to_host64(num) byteswap64(num)
80#define bswap_be_to_host32(num) ((uint32_t)(num))
81#define bswap_le_to_host32(num) byteswap32(num)
82#define bswap_be_to_host16(num) ((uint16_t)(num))
83#define bswap_le_to_host16(num) byteswap16(num)
84
85/* We use ntoh*() here, because the compiler may
86 * attempt to optimise it
87 */
88#elif __BYTE_ORDER == __LITTLE_ENDIAN
89#define bswap_host_to_be64(num) (byteswap64(num))
90#define bswap_host_to_le64(num) ((uint64_t)(num))
91#define bswap_host_to_be32(num) (htonl(num))
92#define bswap_host_to_le32(num) ((uint32_t)(num))
93#define bswap_host_to_be16(num) (htons(num))
94#define bswap_host_to_le16(num) ((uint16_t)(num))
95
96#define bswap_be_to_host64(num) (byteswap64(num))
97#define bswap_le_to_host64(num) ((uint64_t)(num))
98#define bswap_be_to_host32(num) (ntohl(num))
99#define bswap_le_to_host32(num) ((uint32_t)(num))
100#define bswap_be_to_host16(num) (ntohs(num))
101#define bswap_le_to_host16(num) ((uint16_t)(num))
102
103#else
104#error "Unknown byte order"
105#endif
106
107#ifdef __cplusplus
108}
109#endif
110
111#endif
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