/usr/share/ada/adainclude/opentoken/opentoken-text_feeder-text_io.ads is in libopentoken5-dev 6.0b-4.
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--
-- Copyright (C) 2012 - 2014 Stephen Leake
-- Copyright (C) 1999 Ted Dennison
--
-- This file is part of the OpenToken package.
--
-- The OpenToken package is free software; you can redistribute it and/or
-- modify it under the terms of the GNU General Public License as published
-- by the Free Software Foundation; either version 3, or (at your option)
-- any later version. The OpenToken package is distributed in the hope that
-- it will be useful, but WITHOUT 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 the OpenToken
-- package; see file GPL.txt. 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.
--
-------------------------------------------------------------------------------
with Ada.Text_IO;
-----------------------------------------------------------------------------
-- This package provides an implementation of a text feeder class
-- that relies on Ada.Text_IO for the underlying mechanism. Each text
-- line is terminated with an OpenToken.EOF_Character, no matter what
-- actual character (if any) the OS uses for that purpose. This makes
-- this package fairly portable. Unfortunately, it also inherits
-- Text_IO's problem of not being able to read text on the same line
-- as the end of the file. That means all text files used with this
-- feeder need to have a line termintor on the last line of text, or
-- it will be ignored.
-----------------------------------------------------------------------------
package OpenToken.Text_Feeder.Text_IO is
-- An instance of a Text_IO feeder. By default, it will read from
-- Text_IO's current input file.
type Instance is new OpenToken.Text_Feeder.Instance with private;
-- We don't declare Create (File_Name), because then we would need
-- to declare Close (Instance), and we can't close a File_Access,
-- since it is 'access constant'. In addition, it is not allowed
-- to close Ada.Text_IO.Current_Input, and we support reading from
-- Current_Input.
function Create (File_Ptr : in Ada.Text_IO.File_Access) return Instance;
function Create (File_Ptr : in Ada.Text_IO.File_Access) return Text_Feeder_Ptr;
-- File_Ptr must be open.
--------------------------------------------------------------------------
-- This procedure returns strings for the analyzer. If the end of
-- the file is reached, a Token.EOF_Character is retured. Each
-- text line is terminated with an OpenToken.EOF_Character, no
-- matter what actual character (if any) the OS uses for that
-- purpose.
--------------------------------------------------------------------------
overriding procedure Get
(Feeder : in out Instance;
New_Text : out String;
Text_End : out Integer);
--------------------------------------------------------------------------
-- Return True if there is no more text to process. For this
-- feeder, that happens when we are at the end of the file.
--------------------------------------------------------------------------
overriding function End_Of_Text (Feeder : in Instance) return Boolean;
private
type Instance is new OpenToken.Text_Feeder.Instance with record
File : Ada.Text_IO.File_Access := Ada.Text_IO.Current_Input;
Ended : Boolean := False;
end record;
end OpenToken.Text_Feeder.Text_IO;
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