subr.c revision 200420 
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#if 0
35#ifndef lint
36static char sccsid[] = "@(#)subr.c	8.1 (Berkeley) 6/6/93";
37#endif /* not lint */
38#endif
39
40#include <sys/cdefs.h>
41__FBSDID("$FreeBSD: head/usr.bin/ktrace/subr.c 200420 2009-12-11 23:35:38Z delphij $");
42
43#include <sys/param.h>
44#include <sys/file.h>
45#include <sys/proc.h>
46#include <sys/time.h>
47#include <sys/uio.h>
48#include <sys/ktrace.h>
49
50#include "ktrace.h"
51
52void timevaladd(struct timeval *, struct timeval *);
53void timevalsub(struct timeval *, struct timeval *);
54void timevalfix(struct timeval *);
55
56int
57getpoints(char *s)
58{
59	int facs = 0;
60
61	while (*s) {
62		switch(*s) {
63		case 'c':
64			facs |= KTRFAC_SYSCALL | KTRFAC_SYSRET;
65			break;
66		case 'n':
67			facs |= KTRFAC_NAMEI;
68			break;
69		case 'i':
70			facs |= KTRFAC_GENIO;
71			break;
72		case 's':
73			facs |= KTRFAC_PSIG;
74			break;
75		case 't':
76			facs |= KTRFAC_STRUCT;
77			break;
78		case 'u':
79			facs |= KTRFAC_USER;
80			break;
81		case 'w':
82			facs |= KTRFAC_CSW;
83			break;
84		case 'y':
85			facs |= KTRFAC_SYSCTL;
86			break;
87		case '+':
88			facs |= DEF_POINTS;
89			break;
90		default:
91			return (-1);
92		}
93		s++;
94	}
95	return (facs);
96}
97
98void
99timevaladd(struct timeval *t1, struct timeval *t2)
100{
101	t1->tv_sec += t2->tv_sec;
102	t1->tv_usec += t2->tv_usec;
103	timevalfix(t1);
104}
105
106void
107timevalsub(struct timeval *t1, struct timeval *t2)
108{
109	t1->tv_sec -= t2->tv_sec;
110	t1->tv_usec -= t2->tv_usec;
111	timevalfix(t1);
112}
113
114void
115timevalfix(struct timeval *t1)
116{
117	if (t1->tv_usec < 0) {
118		t1->tv_sec--;
119		t1->tv_usec += 1000000;
120	}
121	if (t1->tv_usec >= 1000000) {
122		t1->tv_sec++;
123		t1->tv_usec -= 1000000;
124	}
125}
126