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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- S Y S T E M . S E Q U E N T I A L _ I O --
-- --
-- S p e c --
-- --
-- Copyright (C) 1992-2005 Free Software Foundation, Inc. --
-- --
-- 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. --
-- --
------------------------------------------------------------------------------
-- This package contains the declaration of the control block used for
-- Seqential_IO. This must be declared at the outer library level. It also
-- contains code that is shared between instances of Sequential_IO.
with System.File_Control_Block;
with Ada.Streams;
package System.Sequential_IO is
package FCB renames System.File_Control_Block;
type Sequential_AFCB is new FCB.AFCB with null record;
-- No additional fields required for Sequential_IO
function AFCB_Allocate
(Control_Block : Sequential_AFCB)
return FCB.AFCB_Ptr;
procedure AFCB_Close (File : access Sequential_AFCB);
procedure AFCB_Free (File : access Sequential_AFCB);
procedure Read
(File : in out Sequential_AFCB;
Item : out Ada.Streams.Stream_Element_Array;
Last : out Ada.Streams.Stream_Element_Offset);
-- Required overriding of Read, not actually used for Sequential_IO
procedure Write
(File : in out Sequential_AFCB;
Item : in Ada.Streams.Stream_Element_Array);
-- Required overriding of Write, not actually used for Sequential_IO
type File_Type is access all Sequential_AFCB;
-- File_Type in individual instantiations is derived from this type
procedure Create
(File : in out File_Type;
Mode : in FCB.File_Mode := FCB.Out_File;
Name : in String := "";
Form : in String := "");
procedure Open
(File : in out File_Type;
Mode : in FCB.File_Mode;
Name : in String;
Form : in String := "");
end System.Sequential_IO;
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