Handle negative time and offset from Epoch
[babeltrace.git] / include / babeltrace / endian.h
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1#ifndef _BABELTRACE_ENDIAN_H
2#define _BABELTRACE_ENDIAN_H
3
4/*
5 * babeltrace/endian.h
6 *
7 * Copyright 2012 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
8 *
9 * endian.h compatibility layer.
10 *
11 * Permission is hereby granted, free of charge, to any person obtaining a copy
12 * of this software and associated documentation files (the "Software"), to deal
13 * in the Software without restriction, including without limitation the rights
14 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
15 * copies of the Software, and to permit persons to whom the Software is
16 * furnished to do so, subject to the following conditions:
17 *
18 * The above copyright notice and this permission notice shall be included in
19 * all copies or substantial portions of the Software.
20 *
21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
22 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
24 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
25 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
26 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
27 * SOFTWARE.
28 */
29
30#ifdef __FreeBSD__
31#include <machine/endian.h>
32
33#elif defined(__sun__)
34#include <sys/byteorder.h>
35
36#ifndef __BIG_ENDIAN
37#define __BIG_ENDIAN 4321
38#endif
39#ifndef __LITTLE_ENDIAN
40#define __LITTLE_ENDIAN 1234
41#endif
42
43#ifdef _LITTLE_ENDIAN
44#define __BYTE_ORDER __LITTLE_ENDIAN
45#endif
46
47#ifdef _BIG_ENDIAN
48#define __BYTE_ORDER __BIG_ENDIAN
49#endif
50
51#define LITTLE_ENDIAN __LITTLE_ENDIAN
52#define BIG_ENDIAN __BIG_ENDIAN
53#define BYTE_ORDER __BYTE_ORDER
54
55#define betoh16(x) BE_16(x)
56#define letoh16(x) LE_16(x)
57#define betoh32(x) BE_32(x)
58#define letoh32(x) LE_32(x)
59#define betoh64(x) BE_64(x)
60#define letoh64(x) LE_64(x)
61#define htobe16(x) BE_16(x)
62#define be16toh(x) BE_16(x)
63#define htobe32(x) BE_32(x)
64#define be32toh(x) BE_32(x)
65#define htobe64(x) BE_64(x)
66#define be64toh(x) BE_64(x)
67
68#elif defined(__MINGW32__)
69#ifndef __BIG_ENDIAN
70#define __BIG_ENDIAN 4321
71#endif
72#ifndef __LITTLE_ENDIAN
73#define __LITTLE_ENDIAN 1234
74#endif
75
76#ifndef __BYTE_ORDER
77#define __BYTE_ORDER __LITTLE_ENDIAN
78#endif
79
80#define LITTLE_ENDIAN __LITTLE_ENDIAN
81#define BIG_ENDIAN __BIG_ENDIAN
82#define PDP_ENDIAN __PDP_ENDIAN
83#define BYTE_ORDER __BYTE_ORDER
84
85#elif defined(__APPLE__)
86# include <machine/endian.h>
87# include <libkern/OSByteOrder.h>
88
89# if BYTE_ORDER == LITTLE_ENDIAN
90# define htobe16(x) OSSwapConstInt16(x)
91# define htole16(x) (x)
92# define be16toh(x) OSSwapConstInt16(x)
93# define le16toh(x) (x)
94
95# define htobe32(x) OSSwapConstInt32(x)
96# define htole32(x) (x)
97# define be32toh(x) OSSwapConstInt32(x)
98# define le32toh(x) (x)
99
100# define htobe64(x) OSSwapConstInt64(x)
101# define htole64(x) (x)
102# define be64toh(x) OSSwapConstInt64(x)
103# define le64toh(x) (x)
104
105# else /* BYTE_ORDER == LITTLE_ENDIAN */
106# define htobe16(x) (x)
107# define htole16(x) OSSwapConstInt16(x)
108# define be16toh(x) (x)
109# define le16toh(x) OSSwapConstInt16(x)
110
111# define htobe32(x) (x)
112# define htole32(x) OSSwapConstInt32(x)
113# define be32toh(x) (x)
114# define le32toh(x) OSSwapConstInt32(x)
115
116# define htobe64(x) (x)
117# define htole64(x) OSSwapConstInt64(x)
118# define be64toh(x) (x)
119# define le64toh(x) OSSwapConstInt64(x)
120# endif
121
122#else
123#include <endian.h>
124
125/*
126 * htobe/betoh are not defined for glibc < 2.9, so add them explicitly
127 * if they are missing.
128 */
129# ifdef __USE_BSD
130/* Conversion interfaces. */
131# include <byteswap.h>
132
133# if __BYTE_ORDER == __LITTLE_ENDIAN
134# ifndef htobe16
135# define htobe16(x) __bswap_16(x)
136# endif
137# ifndef htole16
138# define htole16(x) (x)
139# endif
140# ifndef be16toh
141# define be16toh(x) __bswap_16(x)
142# endif
143# ifndef le16toh
144# define le16toh(x) (x)
145# endif
146
147# ifndef htobe32
148# define htobe32(x) __bswap_32(x)
149# endif
150# ifndef htole32
151# define htole32(x) (x)
152# endif
153# ifndef be32toh
154# define be32toh(x) __bswap_32(x)
155# endif
156# ifndef le32toh
157# define le32toh(x) (x)
158# endif
159
160# ifndef htobe64
161# define htobe64(x) __bswap_64(x)
162# endif
163# ifndef htole64
164# define htole64(x) (x)
165# endif
166# ifndef be64toh
167# define be64toh(x) __bswap_64(x)
168# endif
169# ifndef le64toh
170# define le64toh(x) (x)
171# endif
172
173# else /* __BYTE_ORDER == __LITTLE_ENDIAN */
174# ifndef htobe16
175# define htobe16(x) (x)
176# endif
177# ifndef htole16
178# define htole16(x) __bswap_16(x)
179# endif
180# ifndef be16toh
181# define be16toh(x) (x)
182# endif
183# ifndef le16toh
184# define le16toh(x) __bswap_16(x)
185# endif
186
187# ifndef htobe32
188# define htobe32(x) (x)
189# endif
190# ifndef htole32
191# define htole32(x) __bswap_32(x)
192# endif
193# ifndef be32toh
194# define be32toh(x) (x)
195# endif
196# ifndef le32toh
197# define le32toh(x) __bswap_32(x)
198# endif
199
200# ifndef htobe64
201# define htobe64(x) (x)
202# endif
203# ifndef htole64
204# define htole64(x) __bswap_64(x)
205# endif
206# ifndef be64toh
207# define be64toh(x) (x)
208# endif
209# ifndef le64toh
210# define le64toh(x) __bswap_64(x)
211# endif
212
213# endif /* __BYTE_ORDER == __LITTLE_ENDIAN */
214# endif /* __USE_BSD */
215#endif /* else -- __FreeBSD__ */
216
217#ifndef FLOAT_WORD_ORDER
218#ifdef __FLOAT_WORD_ORDER
219#define FLOAT_WORD_ORDER __FLOAT_WORD_ORDER
220#else /* __FLOAT_WORD_ORDER */
221#define FLOAT_WORD_ORDER BYTE_ORDER
222#endif /* __FLOAT_WORD_ORDER */
223#endif /* FLOAT_WORD_ORDER */
224
225#endif /* _BABELTRACE_ENDIAN_H */
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