arch/all-unix/battclock/readbattclock.c

   1 /*
   2     Copyright © 1995-2001, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: ReadBattClock() function.
   6     Lang: english
   7 */
   8
   9 #include "battclock_intern.h"
  10 #include <proto/battclock.h>
  11 #include <proto/utility.h>
  12 #include <utility/date.h>
  13 #if 0
  14 #include <aros/host-conf.h>
  15 #endif
  16
  17 #include <time.h>
  18
  19
  20 AROS_LH0(ULONG, ReadBattClock, struct BattClockBase *, BattClockBase, 2, Battclock)
  21 {
  22     AROS_LIBFUNC_INIT
  23
  24     /*
  25         This is mostly an example.
  26         It is quite possible that this time value is not for the local
  27         timezone, so it has to be converted.
  28     */
  29     time_t t;
  30     struct tm *tm;
  31
  32     time(&t);
  33     tm = localtime(&t);
  34
  35 #if 1
  36     {
  37         struct ClockData date;
  38
  39         date.year  = tm->tm_year + 1900;
  40         date.month = tm->tm_mon + 1;
  41         date.mday  = tm->tm_mday;
  42         date.hour  = tm->tm_hour;
  43         date.min   = tm->tm_min;
  44         date.sec   = tm->tm_sec;
  45
  46         return Date2Amiga(&date);
  47     }
  48
  49 #else
  50     /*
  51         This time is however relative to 1.1.1970, so we have to subtract a
  52         large number of seconds so that things actually work correctly.
  53
  54         There is a problem here that 8 years before the Amiga clock dies,
  55         the Unix system clock will have problems as it will wrap around.
  56         Still, I'll be dead, and by then they won't be using 32-bit clocks
  57         I expect...
  58     */
  59 #ifdef HAVE_STRUCT_TM_TM_GMTOFF
  60     return (t - 252460800 + tm->tm_gmtoff);
  61 #else
  62     return (t - 252460800);
  63 #endif
  64 #endif
  65
  66     AROS_LIBFUNC_EXIT
  67 } /* ReadBattClock */