lib/sh/clock.c

   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
   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.
  11
  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.
  16
  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/>.
  19 */
  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
  35 #include <bashintl.h>
  36
  37 #ifndef locale_decpoint
  38 extern int locale_decpoint PARAMS((void));
  39 #endif
  40
  41 extern long get_clk_tck PARAMS((void));
  42
  43 void
  44 clock_t_to_secs (t, sp, sfp)
  45      clock_t t;
  46      time_t *sp;
  47      int *sfp;
  48 {
  49   static long clk_tck = -1;
  50
  51   if (clk_tck == -1)
  52     clk_tck = get_clk_tck ();
  53
  54   *sfp = t % clk_tck;
  55   *sfp = (*sfp * 1000) / clk_tck;
  56
  57   *sp = t / clk_tck;
  58
  59   /* Sanity check */
  60   if (*sfp >= 1000)
  61     {
  62       *sp += 1;
  63       *sfp -= 1000;
  64     }
  65 }
  66
  67 /* Print the time defined by a clock_t (returned by the `times' and `time'
  68    system calls) in a standard way to stdio stream FP.  This is scaled in
  69    terms of the value of CLK_TCK, which is what is returned by the
  70    `times' call. */
  71 void
  72 print_clock_t (fp, t)
  73      FILE *fp;
  74      clock_t t;
  75 {
  76   time_t timestamp;
  77   long minutes;
  78   int seconds, seconds_fraction;
  79
  80   clock_t_to_secs (t, &timestamp, &seconds_fraction);
  81
  82   minutes = timestamp / 60;
  83   seconds = timestamp % 60;
  84
  85   fprintf (fp, "%ldm%d%c%03ds",  minutes, seconds, locale_decpoint(), seconds_fraction);
  86 }
  87 #endif /* HAVE_TIMES */