------------------------------------------------------------------------------
--                                                                          --
--                         GNAT RUN-TIME COMPONENTS                         --
--                                                                          --
--               A D A . T E X T _ I O . D E C I M A L _ I O                --
--                                                                          --
--                                 S p e c                                  --
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--          Copyright (C) 1992-2023, Free Software Foundation, Inc.         --
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-- 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. --
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-- GNAT is free software;  you can  redistribute it  and/or modify it under --
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-- <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.      --
--                                                                          --
------------------------------------------------------------------------------

--  In Ada 95, the package Ada.Text_IO.Decimal_IO is a subpackage of Text_IO.
--  This is for compatibility with Ada 83. In GNAT we make it a child package
--  to avoid loading the necessary code if Decimal_IO is not instantiated.
--  See routine Rtsfind.Check_Text_IO_Special_Unit for a description of how
--  we patch up the difference in semantics so that it is invisible to the
--  Ada programmer.

private generic
   type Num is delta <> digits <>;

package Ada.Text_IO.Decimal_IO with
  Always_Terminates
is

   Default_Fore : Field := Num'Fore;
   Default_Aft  : Field := Num'Aft;
   Default_Exp  : Field := 0;

   procedure Get
     (File  : File_Type;
      Item  : out Num;
      Width : Field := 0)
   with
     Pre               => Is_Open (File) and then Mode (File) = In_File,
     Global            => (In_Out => File_System),
     Exceptional_Cases => (Data_Error | End_Error => Standard.True);

   procedure Get
     (Item  : out Num;
      Width : Field := 0)
   with
     Post              =>
       Line_Length'Old = Line_Length
       and Page_Length'Old = Page_Length,
     Global            => (In_Out => File_System),
     Exceptional_Cases => (Data_Error | End_Error => Standard.True);

   procedure Put
     (File : File_Type;
      Item : Num;
      Fore : Field := Default_Fore;
      Aft  : Field := Default_Aft;
      Exp  : Field := Default_Exp)
   with
     Pre               => Is_Open (File) and then Mode (File) /= In_File,
     Post              =>
       Line_Length (File)'Old = Line_Length (File)
       and Page_Length (File)'Old = Page_Length (File),
     Global            => (In_Out => File_System),
     Exceptional_Cases => (Layout_Error => Line_Length (File) /= 0);

   procedure Put
     (Item : Num;
      Fore : Field := Default_Fore;
      Aft  : Field := Default_Aft;
      Exp  : Field := Default_Exp)
   with
     Post              =>
       Line_Length'Old = Line_Length
       and Page_Length'Old = Page_Length,
     Global            => (In_Out => File_System),
     Exceptional_Cases => (Layout_Error => Ada.Text_IO.Line_Length /= 0);

   procedure Get
     (From : String;
      Item : out Num;
      Last : out Positive)
   with
     Global   => null,
     Exceptional_Cases => (Data_Error => Standard.True);

   procedure Put
     (To   : out String;
      Item : Num;
      Aft  : Field := Default_Aft;
      Exp  : Field := Default_Exp)
   with
     Global            => null,
     Exceptional_Cases => (Layout_Error => Standard.True);

private
   pragma Inline (Get);
   pragma Inline (Put);

end Ada.Text_IO.Decimal_IO;