1/* clock.c - operations on struct tms and clock_t's */
2
3/* Copyright (C) 1999 Free Software Foundation, Inc.
4
5   This file is part of GNU Bash, the Bourne Again SHell.
6
7   Bash is free software; you can redistribute it and/or modify it under
8   the terms of the GNU General Public License as published by the Free
9   Software Foundation; either version 2, or (at your option) any later
10   version.
11
12   Bash is distributed in the hope that it will be useful, but WITHOUT ANY
13   WARRANTY; without even the implied warranty of MERCHANTABILITY or
14   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
15   for more details.
16
17   You should have received a copy of the GNU General Public License along
18   with Bash; see the file COPYING.  If not, write to the Free Software
19   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA */
20
21#include <config.h>
22
23#if defined (HAVE_TIMES)
24
25#include <sys/types.h>
26#include <posixtime.h>
27
28#if defined (HAVE_SYS_TIMES_H)
29#  include <sys/times.h>
30#endif
31
32#include <stdio.h>
33#include <stdc.h>
34
35extern long get_clk_tck __P((void));
36
37void
38clock_t_to_secs (t, sp, sfp)
39     clock_t t;
40     time_t *sp;
41     int *sfp;
42{
43  static long clk_tck = -1;
44
45  if (clk_tck == -1)
46    clk_tck = get_clk_tck ();
47
48  *sfp = t % clk_tck;
49  *sfp = (*sfp * 1000) / clk_tck;
50
51  *sp = t / clk_tck;
52
53  /* Sanity check */
54  if (*sfp >= 1000)
55    {
56      *sp += 1;
57      *sfp -= 1000;
58    }
59}
60
61/* Print the time defined by a clock_t (returned by the `times' and `time'
62   system calls) in a standard way to stdio stream FP.  This is scaled in
63   terms of the value of CLK_TCK, which is what is returned by the
64   `times' call. */
65void
66print_clock_t (fp, t)
67     FILE *fp;
68     clock_t t;
69{
70  time_t timestamp;
71  long minutes;
72  int seconds, seconds_fraction;
73
74  clock_t_to_secs (t, &timestamp, &seconds_fraction);
75
76  minutes = timestamp / 60;
77  seconds = timestamp % 60;
78
79  fprintf (fp, "%ldm%d.%03ds",  minutes, seconds, seconds_fraction);
80}
81#endif /* HAVE_TIMES */
82