compiler/posixc/gettimeofday.c

   1 /*
   2     Copyright © 1995-2018, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Query the current time and/or timezone.
   6 */
   7
   8 #include <proto/exec.h>
   9 #include <proto/timer.h>
  10 #include <exec/types.h>
  11 #include <aros/symbolsets.h>
  12 #include <aros/debug.h>
  13
  14 #include <time.h>
  15 #include <errno.h>
  16
  17 #include "__posixc_time.h"
  18
  19 /*****************************************************************************
  20
  21     NAME */
  22 #include <sys/time.h>
  23
  24         int gettimeofday (
  25
  26 /*  SYNOPSIS */
  27         struct timeval  * tv,
  28         struct timezone * tz)
  29
  30 /*  FUNCTION
  31         Return the current time and/or timezone.
  32
  33     INPUTS
  34         tv - If this pointer is non-NULL, the current time will be
  35                 stored here. The structure looks like this:
  36
  37                 struct timeval
  38                 {
  39                     long tv_sec;        // seconds
  40                     long tv_usec;       // microseconds
  41                 };
  42
  43         tz - If this pointer is non-NULL, the current timezone will be
  44                 stored here. The structure looks like this:
  45
  46                 struct timezone
  47                 {
  48                     int  tz_minuteswest; // minutes west of Greenwich
  49                     int  tz_dsttime;     // type of dst correction
  50                 };
  51
  52                 With daylight savings times defined as follows :
  53
  54                 DST_NONE        // not on dst
  55                 DST_USA         // USA style dst
  56                 DST_AUST        // Australian style dst
  57                 DST_WET         // Western European dst
  58                 DST_MET         // Middle European dst
  59                 DST_EET         // Eastern European dst
  60                 DST_CAN         // Canada
  61                 DST_GB          // Great Britain and Eire
  62                 DST_RUM         // Rumania
  63                 DST_TUR         // Turkey
  64                 DST_AUSTALT     // Australian style with shift in 1986
  65
  66                 And the following macros are defined to operate on this :
  67
  68                 timerisset(tv) - TRUE if tv contains a time
  69
  70                 timercmp(tv1, tv2, cmp) - Return the result of the
  71                         comparison "tv1 cmp tv2"
  72
  73                 timerclear(tv) - Clear the timeval struct
  74
  75     RESULT
  76         The number of seconds.
  77
  78     NOTES
  79         This function must not be used in a shared library or
  80         in a threaded application.
  81
  82     EXAMPLE
  83         struct timeval tv;
  84
  85         // Get the current time and print it
  86         gettimeofday (&tv, NULL);
  87
  88         printf ("Seconds = %ld, uSec = %ld\n", tv->tv_sec, tv->tv_usec);
  89
  90     BUGS
  91
  92     SEE ALSO
  93         stdc.library/ctime(), stdc.library/asctime(), stdc.library/localtime(),
  94         stdc.library/time()
  95
  96     INTERNALS
  97
  98 ******************************************************************************/
  99 {
 100     struct PosixCIntBase *PosixCBase = (struct PosixCIntBase *)__aros_getbase_PosixCBase();
 101
 102     if (!TimerBase)
 103         __init_timerbase(PosixCBase);
 104
 105     if (tv)
 106     {
 107         if (TimerBase)
 108         {
 109             GetSysTime(tv);
 110
 111             /* Adjust with the current timezone, stored in minutes west of GMT */
 112             tv->tv_sec += (2922 * 1440 + __stdc_gmtoffset()) * 60;
 113         }
 114         else
 115         {
 116             errno = EACCES;
 117             return -1;
 118         }
 119     }
 120
 121     if (tz)
 122     {
 123         tz->tz_minuteswest = __stdc_gmtoffset();
 124         /* FIXME: set tz->tz_dsttime */
 125         tz->tz_dsttime     = DST_NONE;
 126     }
 127
 128     return 0;
 129 } /* gettimeofday */