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------------------------------------------------------------------------------
--                                                                          --
--                         GNAT RUN-TIME COMPONENTS                         --
--                                                                          --
--              A D A . C A L E N D A R . F O R M A T T I N G               --
--                                                                          --
--                                 S p e c                                  --
--                                                                          --
--        Copyright (C) 2005 - 2006, Free Software Foundation, Inc.         --
--                                                                          --
-- This specification is derived from the Ada Reference Manual for use with --
-- GNAT. The copyright notice above, and the license provisions that follow --
-- apply solely to the  contents of the part following the private keyword. --
--                                                                          --
-- GNAT is free software;  you can  redistribute it  and/or modify it under --
-- terms of the  GNU General Public License as published  by the Free Soft- --
-- ware  Foundation;  either version 2,  or (at your option) any later ver- --
-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
-- for  more details.  You should have  received  a copy of the GNU General --
-- Public License  distributed with GNAT;  see file COPYING.  If not, write --
-- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
-- MA 02111-1307, USA.                                                      --
--                                                                          --
-- As a special exception,  if other files  instantiate  generics from this --
-- unit, or you link  this unit with other files  to produce an executable, --
-- this  unit  does not  by itself cause  the resulting  executable  to  be --
-- covered  by the  GNU  General  Public  License.  This exception does not --
-- however invalidate  any other reasons why  the executable file  might be --
-- covered by the  GNU Public License.                                      --
--                                                                          --
-- GNAT was originally developed  by the GNAT team at  New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc.      --
--                                                                          --
------------------------------------------------------------------------------

with Ada.Calendar.Time_Zones;

package Ada.Calendar.Formatting is

   --  Day of the week

   type Day_Name is
     (Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday);

   function Day_Of_Week (Date : Time) return Day_Name;

   --  Hours:Minutes:Seconds access

   subtype Hour_Number     is Natural range 0 .. 23;
   subtype Minute_Number   is Natural range 0 .. 59;
   subtype Second_Number   is Natural range 0 .. 59;
   subtype Second_Duration is Day_Duration range 0.0 .. 1.0;

   function Year
     (Date      : Time;
      Time_Zone : Time_Zones.Time_Offset := 0) return Year_Number;

   function Month
     (Date      : Time;
      Time_Zone : Time_Zones.Time_Offset := 0) return Month_Number;

   function Day
     (Date      : Time;
      Time_Zone : Time_Zones.Time_Offset := 0) return Day_Number;

   function Hour
     (Date      : Time;
      Time_Zone : Time_Zones.Time_Offset := 0) return Hour_Number;

   function Minute
     (Date      : Time;
      Time_Zone : Time_Zones.Time_Offset := 0) return Minute_Number;

   function Second
     (Date : Time)                             return Second_Number;

   function Sub_Second
     (Date : Time)                             return Second_Duration;

   function Seconds_Of
     (Hour       : Hour_Number;
      Minute     : Minute_Number;
      Second     : Second_Number := 0;
      Sub_Second : Second_Duration := 0.0) return Day_Duration;

   procedure Split
     (Seconds    : Day_Duration;
      Hour       : out Hour_Number;
      Minute     : out Minute_Number;
      Second     : out Second_Number;
      Sub_Second : out Second_Duration);

   procedure Split
     (Date       : Time;
      Year       : out Year_Number;
      Month      : out Month_Number;
      Day        : out Day_Number;
      Hour       : out Hour_Number;
      Minute     : out Minute_Number;
      Second     : out Second_Number;
      Sub_Second : out Second_Duration;
      Time_Zone  : Time_Zones.Time_Offset := 0);

   function Time_Of
     (Year        : Year_Number;
      Month       : Month_Number;
      Day         : Day_Number;
      Hour        : Hour_Number;
      Minute      : Minute_Number;
      Second      : Second_Number;
      Sub_Second  : Second_Duration := 0.0;
      Leap_Second : Boolean := False;
      Time_Zone   : Time_Zones.Time_Offset := 0) return Time;

   function Time_Of
     (Year        : Year_Number;
      Month       : Month_Number;
      Day         : Day_Number;
      Seconds     : Day_Duration := 0.0;
      Leap_Second : Boolean := False;
      Time_Zone   : Time_Zones.Time_Offset := 0) return Time;

   procedure Split
     (Date        : Time;
      Year        : out Year_Number;
      Month       : out Month_Number;
      Day         : out Day_Number;
      Hour        : out Hour_Number;
      Minute      : out Minute_Number;
      Second      : out Second_Number;
      Sub_Second  : out Second_Duration;
      Leap_Second : out Boolean;
      Time_Zone   : Time_Zones.Time_Offset := 0);

   procedure Split
     (Date        : Time;
      Year        : out Year_Number;
      Month       : out Month_Number;
      Day         : out Day_Number;
      Seconds     : out Day_Duration;
      Leap_Second : out Boolean;
      Time_Zone   : Time_Zones.Time_Offset := 0);

   --  Simple image and value

   function Image
     (Date                  : Time;
      Include_Time_Fraction : Boolean := False;
      Time_Zone             : Time_Zones.Time_Offset := 0) return String;

   function Value
     (Date       : String;
      Time_Zone  : Time_Zones.Time_Offset := 0) return Time;

   function Image
     (Elapsed_Time          : Duration;
      Include_Time_Fraction : Boolean := False) return String;

   function Value (Elapsed_Time : String) return Duration;

end Ada.Calendar.Formatting;
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