compiler/stdc/__stdc_gmtoffset.c

   1 /*
   2     Copyright © 1995-2018, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Internal arossstdc function to get current GMT offset
   6 */
   7 #include <proto/exec.h>
   8
   9 #define __NOBLIBBASE__
  10
  11 #include <proto/locale.h>
  12 #include <exec/execbase.h>
  13
  14 #include "__stdc_intbase.h"
  15 #include "__optionallibs.h"
  16
  17 /*****************************************************************************
  18
  19     NAME */
  20 #include <time.h>
  21
  22         int __stdc_gmtoffset (
  23
  24 /*  SYNOPSIS */
  25         void)
  26
  27 /*  FUNCTION
  28
  29     INPUTS
  30
  31     RESULT
  32         The offset to GMT in minutes
  33
  34     NOTES
  35         Will return 0 when locale.library is not loaded into memory yet.
  36
  37     EXAMPLE
  38
  39     BUGS
  40
  41     SEE ALSO
  42
  43     INTERNALS
  44         Will always query the current locale through locale.library to
  45         get the GMT offset.
  46
  47 ******************************************************************************/
  48 {
  49     struct StdCIntBase *StdCBase =
  50         (struct StdCIntBase *)__aros_getbase_StdCBase();
  51     struct LocaleBase *LocaleBase;
  52     int gmtoffset = 0;
  53
  54     if (__locale_available(StdCBase))
  55     {
  56         struct Locale *loc;
  57         LocaleBase = StdCBase->StdCLocaleBase;
  58         if ((loc = OpenLocale(NULL)))
  59         {
  60             gmtoffset = (int)loc->loc_GMTOffset;
  61             CloseLocale(loc);
  62         }
  63     }
  64
  65     return gmtoffset;
  66 }