-- --
-- S p e c --
-- --
--- Copyright (C) 1992-2007, 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, 51 Franklin Street, Fifth Floor, --
--- Boston, MA 02110-1301, 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. --
with Ada.IO_Exceptions;
with Ada.Streams;
+
+with Interfaces.C_Streams;
+
with System;
with System.File_Control_Block;
with System.WCh_Con;
-- 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;
-----------------------------------
-- 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,
-- The Standard Files --
------------------------
- Null_Str : aliased constant String := "";
- -- Used as name and form of standard files
-
Standard_Err_AFCB : aliased Wide_Text_AFCB;
Standard_In_AFCB : aliased Wide_Text_AFCB;
Standard_Out_AFCB : aliased Wide_Text_AFCB;
Current_Err : aliased File_Type := Standard_Err;
-- Current files
+ procedure Initialize_Standard_Files;
+ -- Initializes the file control blocks for the standard files. Called from
+ -- the elaboration routine for this package, and from Reset_Standard_Files
+ -- in package Ada.Wide_Text_IO.Reset_Standard_Files.
+
-----------------------
-- Local Subprograms --
-----------------------
-- These subprograms are in the private part of the spec so that they can
- -- be shared by the routines in the body of Ada.Text_IO.Wide_Text_IO.
+ -- be shared by the children of Ada.Wide_Text_IO.
- -- Note: we use Integer in these declarations instead of the more accurate
- -- Interfaces.C_Streams.int, because we do not want to drag in the spec of
- -- this interfaces package with the spec of Ada.Text_IO, and we know that
- -- in fact these types are identical
+ function Getc (File : File_Type) return Interfaces.C_Streams.int;
+ -- Gets next character from file, which has already been checked for being
+ -- in read status, and returns the character read if no error occurs. The
+ -- result is EOF if the end of file was read.
- function Getc (File : File_Type) return Integer;
- -- Gets next character from file, which has already been checked for
- -- being in read status, and returns the character read if no error
- -- occurs. The result is EOF if the end of file was read.
-
- procedure Get_Character
- (File : File_Type;
- Item : out Character);
+ procedure Get_Character (File : File_Type; Item : out Character);
-- This is essentially a copy of the normal Get routine from Text_IO. It
-- obtains a single character from the input file File, and places it in
-- Item. This character may be the leading character of a Wide_Character
-- read and is passed in C. The wide character value is returned as the
-- result, and the file pointer is bumped past the character.
- function Nextc (File : File_Type) return Integer;
- -- Returns next character from file without skipping past it (i.e. it
- -- is a combination of Getc followed by an Ungetc).
-
- procedure Putc (ch : Integer; File : File_Type);
- -- Outputs the given character to the file, which has already been
- -- checked for being in output status. Device_Error is raised if the
- -- character cannot be written.
-
- procedure Terminate_Line (File : File_Type);
- -- If the file is in Write_File or Append_File mode, and the current
- -- line is not terminated, then a line terminator is written using
- -- New_Line. Note that there is no Terminate_Page routine, because
- -- the page mark at the end of the file is implied if necessary.
-
- procedure Ungetc (ch : Integer; File : File_Type);
- -- Pushes back character into stream, using ungetc. The caller has
- -- checked that the file is in read status. Device_Error is raised
- -- if the character cannot be pushed back. An attempt to push back
- -- and end of file character (EOF) is ignored.
+ function Nextc (File : File_Type) return Interfaces.C_Streams.int;
+ -- Returns next character from file without skipping past it (i.e. it is a
+ -- combination of Getc followed by an Ungetc).
end Ada.Wide_Text_IO;
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