-- --
-- S p e c --
-- --
--- Copyright (C) 1992-2005 Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2009, Free Software Foundation, Inc. --
-- --
-- This specification is derived from the Ada Reference Manual for use with --
-- GNAT. The copyright notice above, and the license provisions that follow --
-- --
-- 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- --
+-- ware Foundation; either version 3, 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, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
+-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
--- 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. --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception, --
+-- version 3.1, as published by the Free Software Foundation. --
+-- --
+-- You should have received a copy of the GNU General Public License and --
+-- a copy of the GCC Runtime Library Exception along with this program; --
+-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
+-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
package Ada.Wide_Text_IO is
- package WCh_Con renames System.WCh_Con;
-
type File_Type is limited private;
type File_Mode is (In_File, Out_File, Append_File);
-- Buffer control --
--------------------
- -- Note: The paramter file is in out in the RM, but as pointed out
+ -- Note: The parameter file is in out in the RM, but as pointed out
-- in <<95-5166.a Tucker Taft 95-6-23>> this is clearly an oversight.
procedure Flush (File : File_Type);
Layout_Error : exception renames IO_Exceptions.Layout_Error;
private
+
+ -- The following procedures have a File_Type formal of mode IN OUT because
+ -- they may close the original file. The Close operation may raise an
+ -- exception, but in that case we want any assignment to the formal to
+ -- be effective anyway, so it must be passed by reference (or the caller
+ -- will be left with a dangling pointer).
+
+ pragma Export_Procedure
+ (Internal => Close,
+ External => "",
+ Mechanism => Reference);
+ pragma Export_Procedure
+ (Internal => Delete,
+ External => "",
+ Mechanism => Reference);
+ pragma Export_Procedure
+ (Internal => Reset,
+ External => "",
+ Parameter_Types => (File_Type),
+ Mechanism => Reference);
+ pragma Export_Procedure
+ (Internal => Reset,
+ External => "",
+ Parameter_Types => (File_Type, File_Mode),
+ Mechanism => (File => Reference));
+
+ package WCh_Con renames System.WCh_Con;
+
-----------------------------------
-- Handling of Format Characters --
-----------------------------------
-- omitted on output unless an explicit New_Page call is made before
-- closing the file. No page mark is added when a file is appended to,
-- so, in accordance with the permission in (RM A.10.2(4)), there may
- -- or may not be a page mark separating preexising text in the file
+ -- or may not be a page mark separating preexisting text in the file
-- from the new text to be written.
-- A file mark is marked by the physical end of file. In DOS translation
Line_Length : Count := 0;
Page_Length : Count := 0;
+ Self : aliased File_Type;
+ -- Set to point to the containing Text_AFCB block. This is used to
+ -- implement the Current_{Error,Input,Output} functions which return
+ -- a File_Access, the file access value returned is a pointer to
+ -- the Self field of the corresponding file.
+
Before_LM : Boolean := False;
- -- This flag is used to deal with the anomolies introduced by the
+ -- This flag is used to deal with the anomalies introduced by the
-- peculiar definition of End_Of_File and End_Of_Page in Ada. These
-- functions require looking ahead more than one character. Since
-- there is no convenient way of backing up more than one character,
function AFCB_Allocate (Control_Block : Wide_Text_AFCB) return FCB.AFCB_Ptr;
- procedure AFCB_Close (File : access Wide_Text_AFCB);
- procedure AFCB_Free (File : access Wide_Text_AFCB);
+ procedure AFCB_Close (File : not null access Wide_Text_AFCB);
+ procedure AFCB_Free (File : not null access Wide_Text_AFCB);
procedure Read
(File : in out Wide_Text_AFCB;
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