------------------------------------------------------------------------------
-- --
--- GNAT RUNTIME COMPONENTS --
+-- GNAT RUN-TIME COMPONENTS --
-- --
-- S Y S T E M . D I R E C T _ I O --
-- --
-- B o d y --
-- --
--- Copyright (C) 1992-2003 Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2009, 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- --
+-- 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. --
-- --
------------------------------------------------------------------------------
-with Ada.IO_Exceptions; use Ada.IO_Exceptions;
-with Interfaces.C_Streams; use Interfaces.C_Streams;
-with System; use System;
+with Ada.IO_Exceptions; use Ada.IO_Exceptions;
+with Interfaces.C_Streams; use Interfaces.C_Streams;
+with System; use System;
with System.CRTL;
with System.File_IO;
with System.Soft_Links;
-with Unchecked_Deallocation;
+with Ada.Unchecked_Deallocation;
package body System.Direct_IO is
-- Local Subprograms --
-----------------------
- procedure Set_Position (File : in File_Type);
+ procedure Set_Position (File : File_Type);
-- Sets file position pointer according to value of current index
-------------------
function AFCB_Allocate (Control_Block : Direct_AFCB) return FCB.AFCB_Ptr is
pragma Unreferenced (Control_Block);
-
begin
return new Direct_AFCB;
end AFCB_Allocate;
-- No special processing required for Direct_IO close
- procedure AFCB_Close (File : access Direct_AFCB) is
+ procedure AFCB_Close (File : not null access Direct_AFCB) is
pragma Unreferenced (File);
-
begin
null;
end AFCB_Close;
-- AFCB_Free --
---------------
- procedure AFCB_Free (File : access Direct_AFCB) is
+ procedure AFCB_Free (File : not null access Direct_AFCB) is
type FCB_Ptr is access all Direct_AFCB;
FT : FCB_Ptr := FCB_Ptr (File);
procedure Free is new
- Unchecked_Deallocation (Direct_AFCB, FCB_Ptr);
+ Ada.Unchecked_Deallocation (Direct_AFCB, FCB_Ptr);
begin
Free (FT);
procedure Create
(File : in out File_Type;
- Mode : in FCB.File_Mode := FCB.Inout_File;
- Name : in String := "";
- Form : in String := "")
+ Mode : FCB.File_Mode := FCB.Inout_File;
+ Name : String := "";
+ Form : String := "")
is
Dummy_File_Control_Block : Direct_AFCB;
pragma Warnings (Off, Dummy_File_Control_Block);
- -- Yes, we know this is never assigned a value, only the tag
- -- is used for dispatching purposes, so that's expected.
+ -- Yes, we know this is never assigned a value, only the tag is used for
+ -- dispatching purposes, so that's expected.
begin
FIO.Open (File_Ptr => AP (File),
-- End_Of_File --
-----------------
- function End_Of_File (File : in File_Type) return Boolean is
+ function End_Of_File (File : File_Type) return Boolean is
begin
FIO.Check_Read_Status (AP (File));
return Count (File.Index) > Size (File);
-- Index --
-----------
- function Index (File : in File_Type) return Positive_Count is
+ function Index (File : File_Type) return Positive_Count is
begin
FIO.Check_File_Open (AP (File));
return Count (File.Index);
procedure Open
(File : in out File_Type;
- Mode : in FCB.File_Mode;
- Name : in String;
- Form : in String := "")
+ Mode : FCB.File_Mode;
+ Name : String;
+ Form : String := "")
is
Dummy_File_Control_Block : Direct_AFCB;
pragma Warnings (Off, Dummy_File_Control_Block);
- -- Yes, we know this is never assigned a value, only the tag
- -- is used for dispatching purposes, so that's expected.
+ -- Yes, we know this is never assigned a value, only the tag is used for
+ -- dispatching purposes, so that's expected.
begin
FIO.Open (File_Ptr => AP (File),
----------
procedure Read
- (File : in File_Type;
+ (File : File_Type;
Item : Address;
- Size : in Interfaces.C_Streams.size_t;
- From : in Positive_Count)
+ Size : Interfaces.C_Streams.size_t;
+ From : Positive_Count)
is
begin
Set_Index (File, From);
end Read;
procedure Read
- (File : in File_Type;
+ (File : File_Type;
Item : Address;
- Size : in Interfaces.C_Streams.size_t)
+ Size : Interfaces.C_Streams.size_t)
is
begin
FIO.Check_Read_Status (AP (File));
-- last operation as other, to force the file position to be reset
-- on the next read.
- if File.Bytes = Size then
- File.Last_Op := Op_Read;
- else
- File.Last_Op := Op_Other;
- end if;
+ File.Last_Op := (if File.Bytes = Size then Op_Read else Op_Other);
end Read;
-- The following is the required overriding for Stream.Read, which is
-- Reset --
-----------
- procedure Reset (File : in out File_Type; Mode : in FCB.File_Mode) is
+ procedure Reset (File : in out File_Type; Mode : FCB.File_Mode) is
+ pragma Warnings (Off, File);
+ -- File is actually modified via Unrestricted_Access below, but
+ -- GNAT will generate a warning anyway.
+ --
+ -- Note that we do not use pragma Unmodified here, since in -gnatc mode,
+ -- GNAT will complain that File is modified for "File.Index := 1;"
begin
- FIO.Reset (AP (File), Mode);
+ FIO.Reset (AP (File)'Unrestricted_Access, Mode);
File.Index := 1;
File.Last_Op := Op_Read;
end Reset;
procedure Reset (File : in out File_Type) is
+ pragma Warnings (Off, File);
+ -- See above (other Reset procedure) for explanations on this pragma
begin
- FIO.Reset (AP (File));
+ FIO.Reset (AP (File)'Unrestricted_Access);
File.Index := 1;
File.Last_Op := Op_Read;
end Reset;
-- Set_Index --
---------------
- procedure Set_Index (File : in File_Type; To : in Positive_Count) is
+ procedure Set_Index (File : File_Type; To : Positive_Count) is
begin
FIO.Check_File_Open (AP (File));
File.Index := Count (To);
-- Set_Position --
------------------
- procedure Set_Position (File : in File_Type) is
+ procedure Set_Position (File : File_Type) is
begin
if fseek
(File.Stream, long (File.Bytes) *
-- Size --
----------
- function Size (File : in File_Type) return Count is
+ function Size (File : File_Type) return Count is
begin
FIO.Check_File_Open (AP (File));
File.Last_Op := Op_Other;
procedure Write
(File : File_Type;
Item : Address;
- Size : in Interfaces.C_Streams.size_t;
+ Size : Interfaces.C_Streams.size_t;
Zeroes : System.Storage_Elements.Storage_Array)
is
procedure Do_Write;
-- Do the actual write
+ --------------
+ -- Do_Write --
+ --------------
+
procedure Do_Write is
begin
FIO.Write_Buf (AP (File), Item, Size);
-- last operation as other, to force the file position to be reset
-- on the next write.
- if File.Bytes = Size then
- File.Last_Op := Op_Write;
- else
- File.Last_Op := Op_Other;
- end if;
+ File.Last_Op := (if File.Bytes = Size then Op_Write else Op_Other);
end Write;
-- The following is the required overriding for Stream.Write, which is
procedure Write
(File : in out Direct_AFCB;
- Item : in Ada.Streams.Stream_Element_Array)
+ Item : Ada.Streams.Stream_Element_Array)
is
begin
raise Program_Error;
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