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--                                                                          --

--                         GNAT RUN-TIME COMPONENTS                         --

--                                                                          --

--                              G N A T . I O                               --

--                                                                          --

--                                 S p e c                                  --

--                                                                          --

--                     Copyright (C) 1995-2005, AdaCore                     --

--                                                                          --

-- 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,  51  Franklin  Street,  Fifth  Floor, --

-- Boston, MA 02110-1301, 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.      --

--                                                                          --

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--  A simple preelaborable subset of Text_IO capabilities

--  A simple text I/O package that can be used for simple I/O functions in

--  user programs as required. This package is also preelaborated, unlike

--  Text_IO, and can thus be with'ed by preelaborated library units.

--  Note that Data_Error is not raised by these subprograms for bad data.

--  If such checks are needed then the regular Text_IO package must be used.

package GNAT.IO is

   pragma Preelaborate;

   type File_Type is limited private;

   --  Specifies file to be used (the only possibilities are Standard_Output

   --  and Standard_Error). There is no Create or Open facility that would

   --  allow more general use of file names.

   function Standard_Output return File_Type;

   function Standard_Error  return File_Type;

   --  These functions are the only way to get File_Type values

   procedure Get (X : out Integer);

   procedure Get (C : out Character);

   procedure Get_Line (Item : out String; Last : out Natural);

   --  These routines always read from Standard_Input

   procedure Put (File : File_Type; X : Integer);

   procedure Put (X : Integer);

   --  Output integer to specified file, or to current output file, same

   --  output as if Ada.Text_IO.Integer_IO had been instantiated for Integer.

   procedure Put (File : File_Type; C : Character);

   procedure Put (C : Character);

   --  Output character to specified file, or to current output file

   procedure Put (File : File_Type; S : String);

   procedure Put (S : String);

   --  Output string to specified file, or to current output file

   procedure Put_Line (File : File_Type; S : String);

   procedure Put_Line (S : String);

   --  Output string followed by new line to specified file, or to

   --  current output file.

   procedure New_Line (File : File_Type; Spacing : Positive := 1);

   procedure New_Line (Spacing : Positive := 1);

   --  Output new line character to specified file, or to current output file

   procedure Set_Output (File : File_Type);

   --  Set current output file, default is Standard_Output if no call to

   --  Set_Output is made.

private

   type File_Type is (Stdout, Stderr);

   --  Stdout = Standard_Output, Stderr = Standard_Error

   pragma Inline (Standard_Error);

   pragma Inline (Standard_Output);

end GNAT.IO;