1 /* timeval.c - functions to perform operations on struct timevals */
3 /* Copyright (C) 1999 Free Software Foundation, Inc.
5 This file is part of GNU Bash, the Bourne Again SHell.
7 Bash is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 Bash is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with Bash. If not, see <http://www.gnu.org/licenses/>.
23 #if defined (HAVE_TIMEVAL)
25 #include <sys/types.h>
26 #include <posixtime.h>
31 difftimeval (d, t1, t2)
32 struct timeval *d, *t1, *t2;
34 d->tv_sec = t2->tv_sec - t1->tv_sec;
35 d->tv_usec = t2->tv_usec - t1->tv_usec;
38 d->tv_usec += 1000000;
40 if (d->tv_sec < 0) /* ??? -- BSD/OS does this */
50 addtimeval (d, t1, t2)
51 struct timeval *d, *t1, *t2;
53 d->tv_sec = t1->tv_sec + t2->tv_sec;
54 d->tv_usec = t1->tv_usec + t2->tv_usec;
55 if (d->tv_usec >= 1000000)
57 d->tv_usec -= 1000000;
63 /* Do "cpu = ((user + sys) * 10000) / real;" with timevals.
64 Barely-tested code from Deven T. Corzine <deven@ties.org>. */
66 timeval_to_cpu (rt, ut, st)
67 struct timeval *rt, *ut, *st; /* real, user, sys */
69 struct timeval t1, t2;
72 addtimeval (&t1, ut, st);
73 t2.tv_sec = rt->tv_sec;
74 t2.tv_usec = rt->tv_usec;
76 for (i = 0; i < 6; i++)
78 if ((t1.tv_sec > 99999999) || (t2.tv_sec > 99999999))
81 t1.tv_sec += t1.tv_usec / 100000;
83 t1.tv_usec %= 1000000;
85 t2.tv_sec += t2.tv_usec / 100000;
87 t2.tv_usec %= 1000000;
89 for (i = 0; i < 4; i++)
91 if (t1.tv_sec < 100000000)
97 return ((t2.tv_sec == 0) ? 0 : t1.tv_sec / t2.tv_sec);
100 /* Convert a pointer to a struct timeval to seconds and thousandths of a
101 second, returning the values in *SP and *SFP, respectively. This does
102 rounding on the fractional part, not just truncation to three places. */
104 timeval_to_secs (tvp, sp, sfp)
113 *sfp = tvp->tv_usec % 1000000; /* pretty much a no-op */
115 *sfp = (*sfp * 1000) / 1000000;
127 /* Print the contents of a struct timeval * in a standard way to stdio
130 print_timeval (fp, tvp)
136 int seconds, seconds_fraction;
138 timeval_to_secs (tvp, ×tamp, &seconds_fraction);
140 minutes = timestamp / 60;
141 seconds = timestamp % 60;
143 fprintf (fp, "%ldm%d.%03ds", minutes, seconds, seconds_fraction);
145 #endif /* HAVE_TIMEVAL */