summaryrefslogtreecommitdiffstats
path: root/lib/sh/timeval.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/sh/timeval.c')
-rw-r--r--lib/sh/timeval.c179
1 files changed, 179 insertions, 0 deletions
diff --git a/lib/sh/timeval.c b/lib/sh/timeval.c
new file mode 100644
index 0000000..f2ca762
--- /dev/null
+++ b/lib/sh/timeval.c
@@ -0,0 +1,179 @@
+/* timeval.c - functions to perform operations on struct timevals */
+
+/* Copyright (C) 1999 Free Software Foundation, Inc.
+
+ This file is part of GNU Bash, the Bourne Again SHell.
+
+ Bash is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Bash is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Bash. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <config.h>
+
+#if defined (HAVE_TIMEVAL)
+
+#include <sys/types.h>
+#include <posixtime.h>
+
+#include <bashintl.h>
+#include <stdc.h>
+
+#ifndef locale_decpoint
+extern int locale_decpoint PARAMS((void));
+#endif
+
+#include <stdio.h>
+
+struct timeval *
+difftimeval (d, t1, t2)
+ struct timeval *d, *t1, *t2;
+{
+ d->tv_sec = t2->tv_sec - t1->tv_sec;
+ d->tv_usec = t2->tv_usec - t1->tv_usec;
+ if (d->tv_usec < 0)
+ {
+ d->tv_usec += 1000000;
+ d->tv_sec -= 1;
+ if (d->tv_sec < 0) /* ??? -- BSD/OS does this */
+ {
+ d->tv_sec = 0;
+ d->tv_usec = 0;
+ }
+ }
+ return d;
+}
+
+struct timeval *
+addtimeval (d, t1, t2)
+ struct timeval *d, *t1, *t2;
+{
+ d->tv_sec = t1->tv_sec + t2->tv_sec;
+ d->tv_usec = t1->tv_usec + t2->tv_usec;
+ if (d->tv_usec >= 1000000)
+ {
+ d->tv_usec -= 1000000;
+ d->tv_sec += 1;
+ }
+ return d;
+}
+
+struct timeval *
+multimeval (d, m)
+ struct timeval *d;
+ int m;
+{
+ time_t t;
+
+ t = d->tv_usec * m;
+ d->tv_sec = d->tv_sec * m + t / 1000000;
+ d->tv_usec = t % 1000000;
+ return d;
+}
+
+struct timeval *
+divtimeval (d, m)
+ struct timeval *d;
+ int m;
+{
+ time_t t;
+
+ t = d->tv_sec;
+ d->tv_sec = t / m;
+ d->tv_usec = (d->tv_usec + 1000000 * (t % m)) / m;
+ return d;
+}
+
+/* Do "cpu = ((user + sys) * 10000) / real;" with timevals.
+ Barely-tested code from Deven T. Corzine <deven@ties.org>. */
+int
+timeval_to_cpu (rt, ut, st)
+ struct timeval *rt, *ut, *st; /* real, user, sys */
+{
+ struct timeval t1, t2;
+ register int i;
+
+ addtimeval (&t1, ut, st);
+ t2.tv_sec = rt->tv_sec;
+ t2.tv_usec = rt->tv_usec;
+
+ for (i = 0; i < 6; i++)
+ {
+ if ((t1.tv_sec > 99999999) || (t2.tv_sec > 99999999))
+ break;
+ t1.tv_sec *= 10;
+ t1.tv_sec += t1.tv_usec / 100000;
+ t1.tv_usec *= 10;
+ t1.tv_usec %= 1000000;
+ t2.tv_sec *= 10;
+ t2.tv_sec += t2.tv_usec / 100000;
+ t2.tv_usec *= 10;
+ t2.tv_usec %= 1000000;
+ }
+ for (i = 0; i < 4; i++)
+ {
+ if (t1.tv_sec < 100000000)
+ t1.tv_sec *= 10;
+ else
+ t2.tv_sec /= 10;
+ }
+
+ return ((t2.tv_sec == 0) ? 0 : t1.tv_sec / t2.tv_sec);
+}
+
+/* Convert a pointer to a struct timeval to seconds and thousandths of a
+ second, returning the values in *SP and *SFP, respectively. This does
+ rounding on the fractional part, not just truncation to three places. */
+void
+timeval_to_secs (tvp, sp, sfp)
+ struct timeval *tvp;
+ time_t *sp;
+ int *sfp;
+{
+ int rest;
+
+ *sp = tvp->tv_sec;
+
+ *sfp = tvp->tv_usec % 1000000; /* pretty much a no-op */
+ rest = *sfp % 1000;
+ *sfp = (*sfp * 1000) / 1000000;
+ if (rest >= 500)
+ *sfp += 1;
+
+ /* Sanity check */
+ if (*sfp >= 1000)
+ {
+ *sp += 1;
+ *sfp -= 1000;
+ }
+}
+
+/* Print the contents of a struct timeval * in a standard way to stdio
+ stream FP. */
+void
+print_timeval (fp, tvp)
+ FILE *fp;
+ struct timeval *tvp;
+{
+ time_t timestamp;
+ long minutes;
+ int seconds, seconds_fraction;
+
+ timeval_to_secs (tvp, &timestamp, &seconds_fraction);
+
+ minutes = timestamp / 60;
+ seconds = timestamp % 60;
+
+ fprintf (fp, "%ldm%d%c%03ds", minutes, seconds, locale_decpoint (), seconds_fraction);
+}
+
+#endif /* HAVE_TIMEVAL */