New Language: Ada

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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--                G N A T . C A L E N D A R . T I M E _ I O                 --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--                            $Revision: 1.5 $
+--                                                                          --
+--            Copyright (C) 1999-2001 Ada Core Technologies, 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). --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This package augments standard Ada.Text_IO with facilities for input
+--  and output of time values in standardized format.
+
+package GNAT.Calendar.Time_IO is
+
+   Picture_Error : exception;
+
+   type Picture_String is new String;
+
+   --  This is a string to describe date and time output format. The string is
+   --  a set of standard character and special tag that are replaced by the
+   --  corresponding values. It follows the GNU Date specification. Here are
+   --  the recognized directives :
+   --
+   --          %    a literal %
+   --          n    a newline
+   --          t    a horizontal tab
+   --
+   --          Time fields:
+   --
+   --          %H   hour (00..23)
+   --          %I   hour (01..12)
+   --          %k   hour ( 0..23)
+   --          %l   hour ( 1..12)
+   --          %M   minute (00..59)
+   --          %p   locale's AM or PM
+   --          %r   time, 12-hour (hh:mm:ss [AP]M)
+   --          %s   seconds  since 1970-01-01  00:00:00 UTC
+   --                (a nonstandard extension)
+   --          %S   second (00..59)
+   --          %T   time, 24-hour (hh:mm:ss)
+   --
+   --          Date fields:
+   --
+   --          %a   locale's abbreviated weekday name (Sun..Sat)
+   --          %A   locale's    full   weekday   name,    variable   length
+   --                  (Sunday..Saturday)
+   --          %b   locale's abbreviated month name (Jan..Dec)
+   --          %B   locale's    full    month    name,   variable    length
+   --                  (January..December)
+   --          %c   locale's date and time (Sat Nov 04 12:02:33 EST 1989)
+   --          %d   day of month (01..31)
+   --          %D   date (mm/dd/yy)
+   --          %h   same as %b
+   --          %j   day of year (001..366)
+   --          %m   month (01..12)
+   --          %U   week number  of year with  Sunday as first day  of week
+   --                  (00..53)
+   --          %w   day of week (0..6) with 0 corresponding to Sunday
+   --          %W   week number  of year with  Monday as first day  of week
+   --                  (00..53)
+   --          %x   locale's date representation (mm/dd/yy)
+   --          %y   last two digits of year (00..99)
+   --          %Y   year (1970...)
+   --
+   --          By default,  date pads numeric fields with zeroes.  GNU date
+   --          recognizes the following nonstandard numeric modifiers:
+   --
+   --          -    (hyphen) do not pad the field
+   --          _    (underscore) pad the field with spaces
+
+   ISO_Date      : constant Picture_String;
+   --  This format follow the ISO 8601 standard. The format is "YYYY-MM-DD",
+   --  four digits year, month and day number separated by minus.
+
+   US_Date       : constant Picture_String;
+   --  This format is the common US date format: "MM/DD/YY",
+   --  month and day number, two digits year separated by slashes.
+
+   European_Date : constant Picture_String;
+   --  This format is the common European date format: "DD/MM/YY",
+   --  day and month number, two digits year separated by slashes.
+
+   function Image
+     (Date    : Ada.Calendar.Time;
+      Picture : Picture_String)
+      return    String;
+   --  Return Date as a string with format Picture.
+   --  raise Picture_Error if picture string is wrong
+
+   procedure Put_Time
+     (Date    : Ada.Calendar.Time;
+      Picture : Picture_String);
+   --  Put Date with format Picture.
+   --  raise Picture_Error if picture string is wrong
+
+private
+   ISO_Date      : constant Picture_String := "%Y-%m-%d";
+   US_Date       : constant Picture_String := "%m/%d/%y";
+   European_Date : constant Picture_String := "%d/%m/%y";
+
+end GNAT.Calendar.Time_IO;