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1996-09-28
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3KB
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73 lines
------------------------------------------------------------------------------
-- --
-- GNAT RUNTIME COMPONENTS --
-- --
-- S Y S T E M . S E Q U E N T I A L _ I O --
-- --
-- S p e c --
-- --
-- $Revision: 1.3 $ --
-- --
-- Copyright (c) 1992,1993,1994 NYU, All Rights Reserved --
-- --
-- The GNAT library is free software; you can redistribute it and/or modify --
-- it under terms of the GNU Library General Public License as published by --
-- the Free Software Foundation; either version 2, or (at your option) any --
-- later version. The GNAT library 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 --
-- Library General Public License for more details. You should have --
-- received a copy of the GNU Library General Public License along with --
-- the GNAT library; see the file COPYING.LIB. If not, write to the Free --
-- Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. --
-- --
------------------------------------------------------------------------------
-- 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;
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;