subr.c revision 95649 
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
40#include <sys/cdefs.h>
41__FBSDID("$FreeBSD: head/usr.bin/ktrace/subr.c 95649 2002-04-28 13:00:16Z markm $");
42
43#include <sys/param.h>
44#include <sys/file.h>
45#include <sys/user.h>
46#include <sys/proc.h>
47#include <sys/time.h>
48#include <sys/ktrace.h>
49
50#include <stdio.h>
51
52#include "ktrace.h"
53
54void timevaladd(struct timeval *, struct timeval *);
55void timevalsub(struct timeval *, struct timeval *);
56void timevalfix(struct timeval *);
57
58int
59getpoints(char *s)
60{
61	int facs = 0;
62
63	while (*s) {
64		switch(*s) {
65		case 'c':
66			facs |= KTRFAC_SYSCALL | KTRFAC_SYSRET;
67			break;
68		case 'n':
69			facs |= KTRFAC_NAMEI;
70			break;
71		case 'i':
72			facs |= KTRFAC_GENIO;
73			break;
74		case 's':
75			facs |= KTRFAC_PSIG;
76			break;
77		case 'u':
78			facs |= KTRFAC_USER;
79			break;
80		case 'w':
81			facs |= KTRFAC_CSW;
82			break;
83		case '+':
84			facs |= DEF_POINTS;
85			break;
86		default:
87			return (-1);
88		}
89		s++;
90	}
91	return (facs);
92}
93
94void
95timevaladd(struct timeval *t1, struct timeval *t2)
96{
97	t1->tv_sec += t2->tv_sec;
98	t1->tv_usec += t2->tv_usec;
99	timevalfix(t1);
100}
101
102void
103timevalsub(struct timeval *t1, struct timeval *t2)
104{
105	t1->tv_sec -= t2->tv_sec;
106	t1->tv_usec -= t2->tv_usec;
107	timevalfix(t1);
108}
109
110void
111timevalfix(struct timeval *t1)
112{
113	if (t1->tv_usec < 0) {
114		t1->tv_sec--;
115		t1->tv_usec += 1000000;
116	}
117	if (t1->tv_usec >= 1000000) {
118		t1->tv_sec++;
119		t1->tv_usec -= 1000000;
120	}
121}
122