subr.c revision 99112 
1/*-
2 * Copyright (c) 1988, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35#if 0
36static char sccsid[] = "@(#)subr.c	8.1 (Berkeley) 6/6/93";
37#endif
38#endif /* not lint */
39#include <sys/cdefs.h>
40__FBSDID("$FreeBSD: head/usr.bin/ktrace/subr.c 99112 2002-06-30 05:25:07Z obrien $");
41
42#include <sys/cdefs.h>
43__FBSDID("$FreeBSD: head/usr.bin/ktrace/subr.c 99112 2002-06-30 05:25:07Z obrien $");
44
45#include <sys/param.h>
46#include <sys/file.h>
47#include <sys/user.h>
48#include <sys/proc.h>
49#include <sys/time.h>
50#include <sys/ktrace.h>
51
52#include <stdio.h>
53
54#include "ktrace.h"
55
56void timevaladd(struct timeval *, struct timeval *);
57void timevalsub(struct timeval *, struct timeval *);
58void timevalfix(struct timeval *);
59
60int
61getpoints(char *s)
62{
63	int facs = 0;
64
65	while (*s) {
66		switch(*s) {
67		case 'c':
68			facs |= KTRFAC_SYSCALL | KTRFAC_SYSRET;
69			break;
70		case 'n':
71			facs |= KTRFAC_NAMEI;
72			break;
73		case 'i':
74			facs |= KTRFAC_GENIO;
75			break;
76		case 's':
77			facs |= KTRFAC_PSIG;
78			break;
79		case 'u':
80			facs |= KTRFAC_USER;
81			break;
82		case 'w':
83			facs |= KTRFAC_CSW;
84			break;
85		case '+':
86			facs |= DEF_POINTS;
87			break;
88		default:
89			return (-1);
90		}
91		s++;
92	}
93	return (facs);
94}
95
96void
97timevaladd(struct timeval *t1, struct timeval *t2)
98{
99	t1->tv_sec += t2->tv_sec;
100	t1->tv_usec += t2->tv_usec;
101	timevalfix(t1);
102}
103
104void
105timevalsub(struct timeval *t1, struct timeval *t2)
106{
107	t1->tv_sec -= t2->tv_sec;
108	t1->tv_usec -= t2->tv_usec;
109	timevalfix(t1);
110}
111
112void
113timevalfix(struct timeval *t1)
114{
115	if (t1->tv_usec < 0) {
116		t1->tv_sec--;
117		t1->tv_usec += 1000000;
118	}
119	if (t1->tv_usec >= 1000000) {
120		t1->tv_sec++;
121		t1->tv_usec -= 1000000;
122	}
123}
124