home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Geek Gadgets 1
/
ADE-1.bin
/
ade-dist
/
gnat-2.06-src.tgz
/
tar.out
/
fsf
/
gnat
/
ada
/
s-sequio.adb
< prev
next >
Wrap
Text File
|
1996-09-28
|
5KB
|
153 lines
------------------------------------------------------------------------------
-- --
-- GNAT RUNTIME COMPONENTS --
-- --
-- S Y S T E M . S E Q U E N T I A L _ I O --
-- --
-- B o d y --
-- --
-- $Revision: 1.4 $ --
-- --
-- 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. --
-- --
------------------------------------------------------------------------------
with Ada.IO_Exceptions; use Ada.IO_Exceptions;
with System; use System;
with System.File_IO;
with Unchecked_Deallocation;
package body System.Sequential_IO is
subtype AP is FCB.AFCB_Ptr;
package FIO renames System.File_IO;
-------------------
-- AFCB_Allocate --
-------------------
function AFCB_Allocate
(Control_Block : Sequential_AFCB)
return FCB.AFCB_Ptr
is
begin
return new Sequential_AFCB;
end AFCB_Allocate;
----------------
-- AFCB_Close --
----------------
-- No special processing required for Sequential_IO close
procedure AFCB_Close (File : access Sequential_AFCB) is
begin
null;
end AFCB_Close;
---------------
-- AFCB_Free --
---------------
procedure AFCB_Free (File : access Sequential_AFCB) is
type FCB_Ptr is access all Sequential_AFCB;
FT : FCB_Ptr := File;
procedure Free is new
Unchecked_Deallocation (Sequential_AFCB, FCB_Ptr);
begin
Free (FT);
end AFCB_Free;
------------
-- Create --
------------
procedure Create
(File : in out File_Type;
Mode : in FCB.File_Mode := FCB.Out_File;
Name : in String := "";
Form : in String := "")
is
File_Control_Block : Sequential_AFCB;
begin
FIO.Open (File_Ptr => AP (File),
Dummy_FCB => File_Control_Block,
Mode => Mode,
Name => Name,
Form => Form,
Amethod => 'Q',
Creat => True,
Text => False);
end Create;
----------
-- Open --
----------
procedure Open
(File : in out File_Type;
Mode : in FCB.File_Mode;
Name : in String;
Form : in String := "")
is
File_Control_Block : Sequential_AFCB;
begin
FIO.Open (File_Ptr => AP (File),
Dummy_FCB => File_Control_Block,
Mode => Mode,
Name => Name,
Form => Form,
Amethod => 'Q',
Creat => False,
Text => False);
end Open;
----------
-- Read --
----------
-- Not used, since Sequential_IO files are not used as streams
procedure Read
(File : in out Sequential_AFCB;
Item : out Ada.Streams.Stream_Element_Array;
Last : out Ada.Streams.Stream_Element_Offset)
is
begin
raise Program_Error;
end Read;
-----------
-- Write --
-----------
-- Not used, since Sequential_IO files are not used as streams
procedure Write
(File : in out Sequential_AFCB;
Item : in Ada.Streams.Stream_Element_Array)
is
begin
raise Program_Error;
end Write;
end System.Sequential_IO;