diff options
Diffstat (limited to 'lib/sh/timeval.c')
| -rw-r--r-- | lib/sh/timeval.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/lib/sh/timeval.c b/lib/sh/timeval.c new file mode 100644 index 0000000..f7f624e --- /dev/null +++ b/lib/sh/timeval.c @@ -0,0 +1,145 @@ +/* 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 2, 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; see the file COPYING. If not, write to the Free Software + Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ + +#include <config.h> + +#if defined (HAVE_TIMEVAL) + +#include <sys/types.h> +#include <posixtime.h> + +#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; +} + +/* 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, ×tamp, &seconds_fraction); + + minutes = timestamp / 60; + seconds = timestamp % 60; + + fprintf (fp, "%ldm%d.%03ds", minutes, seconds, seconds_fraction); +} +#endif /* HAVE_TIMEVAL */ |