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------------------------------------------------------------------------------

--                                                                          --

--                         GNAT RUN-TIME COMPONENTS                         --

--                                                                          --

--        A D A . W I D E _ W I D E _ T E X T _ I O . E D I T I N G         --

--                                                                          --

--                                 S p e c                                  --

--                                                                          --

--          Copyright (C) 1992-2009, 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 3,  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.                                     --

--                                                                          --

-- As a special exception under Section 7 of GPL version 3, you are granted --

-- additional permissions described in the GCC Runtime Library Exception,   --

-- version 3.1, as published by the Free Software Foundation.               --

--                                                                          --

-- You should have received a copy of the GNU General Public License and    --

-- a copy of the GCC Runtime Library Exception along with this program;     --

-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --

-- <http://www.gnu.org/licenses/>.                                          --

--                                                                          --

-- GNAT was originally developed  by the GNAT team at  New York University. --

-- Extensive contributions were provided by Ada Core Technologies Inc.      --

--                                                                          --

------------------------------------------------------------------------------

package Ada.Wide_Wide_Text_IO.Editing is

   type Picture is private;

   function Valid

     (Pic_String      : String;

      Blank_When_Zero : Boolean := False) return Boolean;

   function To_Picture

     (Pic_String      : String;

      Blank_When_Zero : Boolean := False) return Picture;

   function Pic_String      (Pic : Picture) return String;

   function Blank_When_Zero (Pic : Picture) return Boolean;

   Max_Picture_Length : constant := 64;

   Picture_Error : exception;

   Default_Currency   : constant Wide_Wide_String    := "$";

   Default_Fill       : constant Wide_Wide_Character := ' ';

   Default_Separator  : constant Wide_Wide_Character := ',';

   Default_Radix_Mark : constant Wide_Wide_Character := '.';

   generic

      type Num is delta <> digits <>;

      Default_Currency   : Wide_Wide_String :=

                                Wide_Wide_Text_IO.Editing.Default_Currency;

      Default_Fill       : Wide_Wide_Character :=

                                Wide_Wide_Text_IO.Editing.Default_Fill;

      Default_Separator  : Wide_Wide_Character :=

                                Wide_Wide_Text_IO.Editing.Default_Separator;

      Default_Radix_Mark : Wide_Wide_Character :=

                                Wide_Wide_Text_IO.Editing.Default_Radix_Mark;

   package Decimal_Output is

      function Length

        (Pic      : Picture;

         Currency : Wide_Wide_String := Default_Currency) return Natural;

      function Valid

        (Item     : Num;

         Pic      : Picture;

         Currency : Wide_Wide_String := Default_Currency) return Boolean;

      function Image

        (Item       : Num;

         Pic        : Picture;

         Currency   : Wide_Wide_String    := Default_Currency;

         Fill       : Wide_Wide_Character := Default_Fill;

         Separator  : Wide_Wide_Character := Default_Separator;

         Radix_Mark : Wide_Wide_Character := Default_Radix_Mark)

         return Wide_Wide_String;

      procedure Put

        (File       : File_Type;

         Item       : Num;

         Pic        : Picture;

         Currency   : Wide_Wide_String    := Default_Currency;

         Fill       : Wide_Wide_Character := Default_Fill;

         Separator  : Wide_Wide_Character := Default_Separator;

         Radix_Mark : Wide_Wide_Character := Default_Radix_Mark);

      procedure Put

        (Item       : Num;

         Pic        : Picture;

         Currency   : Wide_Wide_String    := Default_Currency;

         Fill       : Wide_Wide_Character := Default_Fill;

         Separator  : Wide_Wide_Character := Default_Separator;

         Radix_Mark : Wide_Wide_Character := Default_Radix_Mark);

      procedure Put

        (To         : out Wide_Wide_String;

         Item       : Num;

         Pic        : Picture;

         Currency   : Wide_Wide_String    := Default_Currency;

         Fill       : Wide_Wide_Character := Default_Fill;

         Separator  : Wide_Wide_Character := Default_Separator;

         Radix_Mark : Wide_Wide_Character := Default_Radix_Mark);

   end Decimal_Output;

private

   MAX_PICSIZE      : constant := 50;

   MAX_MONEYSIZE    : constant := 10;

   Invalid_Position : constant := -1;

   subtype Pic_Index is Natural range 0 .. MAX_PICSIZE;

   type Picture_Record (Length : Pic_Index := 0) is record

      Expanded : String (1 .. Length);

   end record;

   type Format_Record is record

      Picture              : Picture_Record;

      --  Read only

      Blank_When_Zero      : Boolean;

      --  Read/write

      Original_BWZ         : Boolean;

      --  The following components get written

      Star_Fill            : Boolean := False;

      Radix_Position       : Integer := Invalid_Position;

      Sign_Position,

      Second_Sign          : Integer := Invalid_Position;

      Start_Float,

      End_Float            : Integer := Invalid_Position;

      Start_Currency,

      End_Currency         : Integer := Invalid_Position;

      Max_Leading_Digits   : Integer := 0;

      Max_Trailing_Digits  : Integer := 0;

      Max_Currency_Digits  : Integer := 0;

      Floater              : Wide_Wide_Character := '!';

      --  Initialized to illegal value

   end record;

   type Picture is record

      Contents : Format_Record;

   end record;

   type Number_Attributes is record

      Negative     : Boolean := False;

      Has_Fraction : Boolean := False;

      Start_Of_Int,

      End_Of_Int,

      Start_Of_Fraction,

      End_Of_Fraction : Integer := Invalid_Position;    -- invalid value

   end record;

   function Parse_Number_String (Str : String) return Number_Attributes;

   --  Assumed format is 'IMAGE or Fixed_IO.Put format (depends on no

   --  trailing blanks...)

   procedure Precalculate (Pic : in out Format_Record);

   --  Precalculates fields from the user supplied data

   function Format_Number

     (Pic                 : Format_Record;

      Number              : String;

      Currency_Symbol     : Wide_Wide_String;

      Fill_Character      : Wide_Wide_Character;

      Separator_Character : Wide_Wide_Character;

      Radix_Point         : Wide_Wide_Character) return Wide_Wide_String;

   --  Formats number according to Pic

   function Expand (Picture : String) return String;

end Ada.Wide_Wide_Text_IO.Editing;