New Language: Ada

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@45953 138bc75d-0d04-0410-961f-82ee72b054a4

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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--                         A D A . C A L E N D A R                          --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--                            $Revision: 1.11 $                              --
+--                                                                          --
+--          Copyright (C) 1992-1997 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. --
+-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
+--                                                                          --
+------------------------------------------------------------------------------
+
+package Ada.Calendar is
+
+   type Time is private;
+
+   --  Declarations representing limits of allowed local time values. Note that
+   --  these do NOT constrain the possible stored values of time which may well
+   --  permit a larger range of times (this is explicitly allowed in Ada 95).
+
+   subtype Year_Number  is Integer range 1901 .. 2099;
+   subtype Month_Number is Integer range 1 .. 12;
+   subtype Day_Number   is Integer range 1 .. 31;
+
+   subtype Day_Duration is Duration range 0.0 .. 86_400.0;
+
+   function Clock return Time;
+
+   function Year    (Date : Time) return Year_Number;
+   function Month   (Date : Time) return Month_Number;
+   function Day     (Date : Time) return Day_Number;
+   function Seconds (Date : Time) return Day_Duration;
+
+   procedure Split
+     (Date    : Time;
+      Year    : out Year_Number;
+      Month   : out Month_Number;
+      Day     : out Day_Number;
+      Seconds : out Day_Duration);
+
+   function Time_Of
+     (Year    : Year_Number;
+      Month   : Month_Number;
+      Day     : Day_Number;
+      Seconds : Day_Duration := 0.0)
+      return    Time;
+
+   function "+" (Left : Time;     Right : Duration) return Time;
+   function "+" (Left : Duration; Right : Time)     return Time;
+   function "-" (Left : Time;     Right : Duration) return Time;
+   function "-" (Left : Time;     Right : Time)     return Duration;
+
+   function "<"  (Left, Right : Time) return Boolean;
+   function "<=" (Left, Right : Time) return Boolean;
+   function ">"  (Left, Right : Time) return Boolean;
+   function ">=" (Left, Right : Time) return Boolean;
+
+   Time_Error : exception;
+
+private
+   pragma Inline (Clock);
+
+   pragma Inline (Year);
+   pragma Inline (Month);
+   pragma Inline (Day);
+
+   pragma Inline ("+");
+   pragma Inline ("-");
+
+   pragma Inline ("<");
+   pragma Inline ("<=");
+   pragma Inline (">");
+   pragma Inline (">=");
+
+   --  Time is represented as a signed duration from the base point which is
+   --  what Unix calls the EPOCH (i.e. 12 midnight (24:00:00), Dec 31st, 1969,
+   --  or if you prefer 0:00:00 on Jan 1st, 1970). Since Ada allows dates
+   --  before this EPOCH value, the stored duration value may be negative.
+
+   --  The time value stored is typically a GMT value, as provided in standard
+   --  Unix environments. If this is the case then Split and Time_Of perform
+   --  required conversions to and from local times. The range of times that
+   --  can be stored in Time values depends on the declaration of the type
+   --  Duration, which must at least cover the required Ada range represented
+   --  by the declaration of Year_Number, but may be larger (we take full
+   --  advantage of the new permission in Ada 95 to store time values outside
+   --  the range that would be acceptable to Split). The Duration type is a
+   --  real value representing a time interval in seconds.
+
+   type Time is new Duration;
+
+end Ada.Calendar;