xref: /dflybsd-src/contrib/tcpdump/timeval-operations.h (revision 59c07fbdf8168fa08c76c515186d561b5a92690c)
1411677aeSAaron LI /*
2411677aeSAaron LI  * Copyright (c) 2015 The TCPDUMP project
3411677aeSAaron LI  * All rights reserved.
4411677aeSAaron LI  *
5411677aeSAaron LI  * Redistribution and use in source and binary forms, with or without
6411677aeSAaron LI  * modification, are permitted provided that the following conditions
7411677aeSAaron LI  * are met:
8411677aeSAaron LI  * 1. Redistributions of source code must retain the above copyright
9411677aeSAaron LI  *    notice, this list of conditions and the following disclaimer.
10411677aeSAaron LI  * 2. Redistributions in binary form must reproduce the above copyright
11411677aeSAaron LI  *    notice, this list of conditions and the following disclaimer in the
12411677aeSAaron LI  *    documentation and/or other materials provided with the distribution.
13411677aeSAaron LI  *
14411677aeSAaron LI  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
15411677aeSAaron LI  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
16411677aeSAaron LI  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
17411677aeSAaron LI  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
18411677aeSAaron LI  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
19411677aeSAaron LI  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
20411677aeSAaron LI  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21411677aeSAaron LI  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22411677aeSAaron LI  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23411677aeSAaron LI  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
24411677aeSAaron LI  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
25411677aeSAaron LI  * POSSIBILITY OF SUCH DAMAGE.
26411677aeSAaron LI  */
27411677aeSAaron LI 
28411677aeSAaron LI #ifndef netdissect_timeval_operations_h
29411677aeSAaron LI #define netdissect_timeval_operations_h
30411677aeSAaron LI 
31411677aeSAaron LI /* Operations on timevals. */
32411677aeSAaron LI 
33*ed775ee7SAntonio Huete Jimenez #define ND_MICRO_PER_SEC 1000000
34*ed775ee7SAntonio Huete Jimenez #define ND_NANO_PER_SEC 1000000000
35411677aeSAaron LI 
36411677aeSAaron LI #define netdissect_timevalclear(tvp) ((tvp)->tv_sec = (tvp)->tv_usec = 0)
37411677aeSAaron LI 
38411677aeSAaron LI #define netdissect_timevalisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec)
39411677aeSAaron LI 
40411677aeSAaron LI #define netdissect_timevalcmp(tvp, uvp, cmp)   \
41411677aeSAaron LI 	(((tvp)->tv_sec == (uvp)->tv_sec) ?    \
42411677aeSAaron LI 	 ((tvp)->tv_usec cmp (uvp)->tv_usec) : \
43411677aeSAaron LI 	 ((tvp)->tv_sec cmp (uvp)->tv_sec))
44411677aeSAaron LI 
45411677aeSAaron LI #define netdissect_timevaladd(tvp, uvp, vvp, nano_prec)           \
46411677aeSAaron LI 	do {                                                      \
47411677aeSAaron LI 		(vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec;    \
48411677aeSAaron LI 		(vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \
49411677aeSAaron LI 		if (nano_prec) {                                  \
50*ed775ee7SAntonio Huete Jimenez 			if ((vvp)->tv_usec >= ND_NANO_PER_SEC) {  \
51411677aeSAaron LI 				(vvp)->tv_sec++;                  \
52*ed775ee7SAntonio Huete Jimenez 				(vvp)->tv_usec -= ND_NANO_PER_SEC; \
53411677aeSAaron LI 			}                                         \
54411677aeSAaron LI 		} else {                                          \
55*ed775ee7SAntonio Huete Jimenez 			if ((vvp)->tv_usec >= ND_MICRO_PER_SEC) { \
56411677aeSAaron LI 				(vvp)->tv_sec++;                  \
57*ed775ee7SAntonio Huete Jimenez 				(vvp)->tv_usec -= ND_MICRO_PER_SEC; \
58411677aeSAaron LI 			}                                         \
59411677aeSAaron LI 		}                                                 \
60411677aeSAaron LI 	} while (0)
61411677aeSAaron LI 
62411677aeSAaron LI #define netdissect_timevalsub(tvp, uvp, vvp, nano_prec)            \
63411677aeSAaron LI 	do {                                                       \
64411677aeSAaron LI 		(vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec;     \
65411677aeSAaron LI 		(vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec;  \
66411677aeSAaron LI 		if ((vvp)->tv_usec < 0) {                          \
67411677aeSAaron LI 		    (vvp)->tv_sec--;                               \
68*ed775ee7SAntonio Huete Jimenez 		    (vvp)->tv_usec += (nano_prec ? ND_NANO_PER_SEC : \
69*ed775ee7SAntonio Huete Jimenez 				       ND_MICRO_PER_SEC);          \
70411677aeSAaron LI 		}                                                  \
71411677aeSAaron LI 	} while (0)
72411677aeSAaron LI 
73411677aeSAaron LI #endif /* netdissect_timeval_operations_h */
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