/src/unbound/util/timeval_func.c

Source (jump to first uncovered line)
/*
 * util/timeval_func.c - helpers to work with struct timeval values.
 *
 * Copyright (c) 2023, NLnet Labs. All rights reserved.
 *
 * This software is open source.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of the NLNET LABS nor the names of its contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/**
 * \file
 *
 * This file contains helpers to manipulate struct timeval values.
 */

#include "config.h"
#include "timeval_func.h"

/** subtract timers and the values do not overflow or become negative */
void
timeval_subtract(struct timeval* d, const struct timeval* end, const struct timeval* start)
{
#ifndef S_SPLINT_S
  time_t end_usec = end->tv_usec;
  d->tv_sec = end->tv_sec - start->tv_sec;
  if(end_usec < start->tv_usec) {
    end_usec += 1000000;
    d->tv_sec--;
  }
  d->tv_usec = end_usec - start->tv_usec;
#endif
}

/** add timers and the values do not overflow or become negative */
void
timeval_add(struct timeval* d, const struct timeval* add)
{
#ifndef S_SPLINT_S
  d->tv_sec += add->tv_sec;
  d->tv_usec += add->tv_usec;
  if(d->tv_usec >= 1000000 ) {
    d->tv_usec -= 1000000;
    d->tv_sec++;
  }
#endif
}

/** divide sum of timers to get average */
void
timeval_divide(struct timeval* avg, const struct timeval* sum, long long d)
{
#ifndef S_SPLINT_S
  long long leftover;
  if(d <= 0) {
    avg->tv_sec = 0;
    avg->tv_usec = 0;
    return;
  }
  avg->tv_sec = sum->tv_sec / d;
  avg->tv_usec = sum->tv_usec / d;
  /* handle fraction from seconds divide */
  leftover = sum->tv_sec - avg->tv_sec*d;
  if(leftover <= 0)
    leftover = 0;
  avg->tv_usec += (((long long)leftover)*((long long)1000000))/d;
  if(avg->tv_sec < 0)
    avg->tv_sec = 0;
  if(avg->tv_usec < 0)
    avg->tv_usec = 0;
#endif
}

/** histogram compare of time values */
int
timeval_smaller(const struct timeval* x, const struct timeval* y)
{
#ifndef S_SPLINT_S
  if(x->tv_sec < y->tv_sec)
    return 1;
  else if(x->tv_sec == y->tv_sec) {
    if(x->tv_usec <= y->tv_usec)
      return 1;
    else  return 0;
  }
  else  return 0;
#endif
}

Line	Count	Source (jump to first uncovered line)
1		/*
2		* util/timeval_func.c - helpers to work with struct timeval values.
3		*
4		* Copyright (c) 2023, NLnet Labs. All rights reserved.
5		*
6		* This software is open source.
7		*
8		* Redistribution and use in source and binary forms, with or without
9		* modification, are permitted provided that the following conditions
10		* are met:
11		*
12		* Redistributions of source code must retain the above copyright notice,
13		* this list of conditions and the following disclaimer.
14		*
15		* Redistributions in binary form must reproduce the above copyright notice,
16		* this list of conditions and the following disclaimer in the documentation
17		* and/or other materials provided with the distribution.
18		*
19		* Neither the name of the NLNET LABS nor the names of its contributors may
20		* be used to endorse or promote products derived from this software without
21		* specific prior written permission.
22		*
23		* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
24		* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
25		* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
26		* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
27		* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
28		* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
29		* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
30		* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31		* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32		* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33		* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34		*/
35
36		/**
37		* \file
38		*
39		* This file contains helpers to manipulate struct timeval values.
40		*/
41
42		#include "config.h"
43		#include "timeval_func.h"
44
45		/** subtract timers and the values do not overflow or become negative */
46		void
47		timeval_subtract(struct timeval* d, const struct timeval* end, const struct timeval* start)
48	0	{
49	0	#ifndef S_SPLINT_S
50	0	time_t end_usec = end->tv_usec;
51	0	d->tv_sec = end->tv_sec - start->tv_sec;
52	0	if(end_usec < start->tv_usec) {
53	0	end_usec += 1000000;
54	0	d->tv_sec--;
55	0	}
56	0	d->tv_usec = end_usec - start->tv_usec;
57	0	#endif
58	0	}
59
60		/** add timers and the values do not overflow or become negative */
61		void
62		timeval_add(struct timeval* d, const struct timeval* add)
63	0	{
64	0	#ifndef S_SPLINT_S
65	0	d->tv_sec += add->tv_sec;
66	0	d->tv_usec += add->tv_usec;
67	0	if(d->tv_usec >= 1000000 ) {
68	0	d->tv_usec -= 1000000;
69	0	d->tv_sec++;
70	0	}
71	0	#endif
72	0	}
73
74		/** divide sum of timers to get average */
75		void
76		timeval_divide(struct timeval* avg, const struct timeval* sum, long long d)
77	0	{
78	0	#ifndef S_SPLINT_S
79	0	long long leftover;
80	0	if(d <= 0) {
81	0	avg->tv_sec = 0;
82	0	avg->tv_usec = 0;
83	0	return;
84	0	}
85	0	avg->tv_sec = sum->tv_sec / d;
86	0	avg->tv_usec = sum->tv_usec / d;
87		/* handle fraction from seconds divide */
88	0	leftover = sum->tv_sec - avg->tv_sec*d;
89	0	if(leftover <= 0)
90	0	leftover = 0;
91	0	avg->tv_usec += (((long long)leftover)*((long long)1000000))/d;
92	0	if(avg->tv_sec < 0)
93	0	avg->tv_sec = 0;
94	0	if(avg->tv_usec < 0)
95	0	avg->tv_usec = 0;
96	0	#endif
97	0	}
98
99		/** histogram compare of time values */
100		int
101		timeval_smaller(const struct timeval* x, const struct timeval* y)
102	0	{
103	0	#ifndef S_SPLINT_S
104	0	if(x->tv_sec < y->tv_sec)
105	0	return 1;
106	0	else if(x->tv_sec == y->tv_sec) {
107	0	if(x->tv_usec <= y->tv_usec)
108	0	return 1;
109	0	else return 0;
110	0	}
111	0	else return 0;
112	0	#endif
113	0	}

Coverage Report

Created: 2025-07-12 06:29