rom/dos/datestamp.c

   1 /*
   2     Copyright © 1995-2007, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: DateStamp() - Get the current date.
   6     Lang: english
   7 */
   8 #include <devices/timer.h>
   9 #include <proto/timer.h>
  10 #include "dos_intern.h"
  11
  12 #define SECONDS_PER_DAY     (60UL * 60 * 24)
  13 #define SECONDS_PER_MINUTE  (60UL)
  14 #define uSEC_PER_SEC        (1000000UL)
  15 #define TICKS_PER_SEC       (50UL)
  16 #define uSEC_PER_TICK       (uSEC_PER_SEC / TICKS_PER_SEC)
  17
  18 /*****************************************************************************
  19
  20     NAME */
  21 #include <proto/dos.h>
  22
  23         AROS_LH1(struct DateStamp *, DateStamp,
  24
  25 /*  SYNOPSIS */
  26         AROS_LHA(struct DateStamp *, date, D1),
  27
  28 /*  LOCATION */
  29         struct DosLibrary *, DOSBase, 32, Dos)
  30
  31 /*  FUNCTION
  32         Fills the structure with the current time. Time is measured from
  33         Jan 1, 1978.
  34
  35     INPUTS
  36         date - The structure to fill.
  37
  38     RESULT
  39         date->ds_Days is filled with the days from Jan 1, 1978.
  40         date->ds_Minute is filled with the number of minutes elapsed in the
  41         day. date->ds_Tick is the number of ticks elapsed in the current
  42         minute. A tick happens 50 times a second. DateStamp() ensures that
  43         the day and minute are consistent. All three elements are zero if
  44         the date is unset.
  45
  46     NOTES
  47         The original function could only return even multiples of 50 ticks.
  48
  49     EXAMPLE
  50
  51     BUGS
  52
  53     SEE ALSO
  54
  55     INTERNALS
  56
  57 *****************************************************************************/
  58 {
  59     AROS_LIBFUNC_INIT
  60
  61     /* We get the date from the timer.device before splitting it up */
  62     struct timeval tv;
  63     GetSysTime(&tv);
  64
  65     date->ds_Days = tv.tv_secs / SECONDS_PER_DAY;
  66     tv.tv_secs %= SECONDS_PER_DAY;
  67     date->ds_Minute = tv.tv_secs / SECONDS_PER_MINUTE;
  68     tv.tv_secs %= SECONDS_PER_MINUTE;
  69     date->ds_Tick = (tv.tv_micro + tv.tv_secs * uSEC_PER_SEC) /
  70             uSEC_PER_TICK;
  71
  72     return date;
  73     AROS_LIBFUNC_EXIT
  74 } /* DateStamp */