rom/dos/comparedates.c

   1 /*
   2     Copyright © 1995-2007, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc:
   6     Lang: English
   7 */
   8 #include "dos_intern.h"
   9
  10 /*****************************************************************************
  11
  12     NAME */
  13 #include <proto/dos.h>
  14
  15         AROS_LH2(LONG, CompareDates,
  16
  17 /*  SYNOPSIS */
  18         AROS_LHA(const struct DateStamp *, date1, D1),
  19         AROS_LHA(const struct DateStamp *, date2, D2),
  20
  21 /*  LOCATION */
  22         struct DosLibrary *, DOSBase, 123, Dos)
  23
  24 /*  FUNCTION
  25         Compares two dates.
  26
  27     INPUTS
  28         date1, date2 - The two dates to compare.
  29
  30     RESULT
  31         < 0 if date1 is later than date2, == 0 if they are equal or > 0
  32         if date2 is later than date1.
  33
  34     NOTES
  35         This is NOT the same ordering as strcmp() !
  36
  37     EXAMPLE
  38
  39     BUGS
  40
  41     SEE ALSO
  42
  43     INTERNALS
  44
  45 *****************************************************************************/
  46 {
  47     AROS_LIBFUNC_INIT
  48     LONG diff;
  49
  50     diff = date2->ds_Days - date1->ds_Days;
  51
  52     if (diff == 0)
  53     {
  54         diff = date2->ds_Minute - date1->ds_Minute;
  55
  56         if (diff == 0)
  57             diff = date2->ds_Tick - date1->ds_Tick;
  58     }
  59
  60     return diff;
  61
  62     AROS_LIBFUNC_EXIT
  63 } /* CompareDates */