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   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --                        A D A . D I R E C T _ I O                         --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2004 Free Software Foundation, Inc.          --
  10 --                                                                          --
  11 -- This specification is derived from the Ada Reference Manual for use with --
  12 -- GNAT. The copyright notice above, and the license provisions that follow --
  13 -- apply solely to the  contents of the part following the private keyword. --
  14 --                                                                          --
  15 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  16 -- terms of the  GNU General Public License as published  by the Free Soft- --
  17 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  18 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  19 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  20 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  21 -- for  more details.  You should have  received  a copy of the GNU General --
  22 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  23 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  24 -- MA 02111-1307, USA.                                                      --
  25 --                                                                          --
  26 -- As a special exception,  if other files  instantiate  generics from this --
  27 -- unit, or you link  this unit with other files  to produce an executable, --
  28 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  29 -- covered  by the  GNU  General  Public  License.  This exception does not --
  30 -- however invalidate  any other reasons why  the executable file  might be --
  31 -- covered by the  GNU Public License.                                      --
  32 --                                                                          --
  33 -- GNAT was originally developed  by the GNAT team at  New York University. --
  34 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  35 --                                                                          --
  36 ------------------------------------------------------------------------------
  37
  38
  39 with Ada.IO_Exceptions;
  40 with System.Direct_IO;
  41 with Interfaces.C_Streams;
  42
  43 generic
  44    type Element_Type is private;
  45
  46 package Ada.Direct_IO is
  47
  48    pragma Compile_Time_Warning
  49      (Element_Type'Has_Access_Values,
  50       "?Element_Type for Direct_'I'O instance has access values");
  51
  52    type File_Type is limited private;
  53
  54    type File_Mode is (In_File, Inout_File, Out_File);
  55
  56    --  The following representation clause allows the use of unchecked
  57    --  conversion for rapid translation between the File_Mode type
  58    --  used in this package and System.File_IO.
  59
  60    for File_Mode use
  61      (In_File    => 0,   -- System.File_IO.File_Mode'Pos (In_File)
  62       Inout_File => 1,   -- System.File_IO.File_Mode'Pos (Inout_File);
  63       Out_File   => 2);  -- System.File_IO.File_Mode'Pos (Out_File)
  64
  65    type Count is range 0 .. System.Direct_IO.Count'Last;
  66
  67    subtype Positive_Count is Count range 1 .. Count'Last;
  68
  69    ---------------------
  70    -- File Management --
  71    ---------------------
  72
  73    procedure Create
  74      (File : in out File_Type;
  75       Mode : in File_Mode := Inout_File;
  76       Name : in String := "";
  77       Form : in String := "");
  78
  79    procedure Open
  80      (File : in out File_Type;
  81       Mode : in File_Mode;
  82       Name : in String;
  83       Form : in String := "");
  84
  85    procedure Close  (File : in out File_Type);
  86    procedure Delete (File : in out File_Type);
  87    procedure Reset  (File : in out File_Type; Mode : in File_Mode);
  88    procedure Reset  (File : in out File_Type);
  89
  90    function Mode (File : in File_Type) return File_Mode;
  91    function Name (File : in File_Type) return String;
  92    function Form (File : in File_Type) return String;
  93
  94    function Is_Open (File : in File_Type) return Boolean;
  95
  96    ---------------------------------
  97    -- Input and Output Operations --
  98    ---------------------------------
  99
 100    procedure Read
 101      (File : in File_Type;
 102       Item : out Element_Type;
 103       From : in Positive_Count);
 104
 105    procedure Read
 106      (File : in File_Type;
 107       Item : out Element_Type);
 108
 109    procedure Write
 110      (File : in File_Type;
 111       Item : in Element_Type;
 112       To   : in Positive_Count);
 113
 114    procedure Write
 115      (File : in File_Type;
 116       Item : in Element_Type);
 117
 118    procedure Set_Index (File : in File_Type; To : in Positive_Count);
 119
 120    function Index (File : in File_Type) return Positive_Count;
 121    function Size  (File : in File_Type) return Count;
 122
 123    function End_Of_File (File : in File_Type) return Boolean;
 124
 125    ----------------
 126    -- Exceptions --
 127    ----------------
 128
 129    Status_Error : exception renames IO_Exceptions.Status_Error;
 130    Mode_Error   : exception renames IO_Exceptions.Mode_Error;
 131    Name_Error   : exception renames IO_Exceptions.Name_Error;
 132    Use_Error    : exception renames IO_Exceptions.Use_Error;
 133    Device_Error : exception renames IO_Exceptions.Device_Error;
 134    End_Error    : exception renames IO_Exceptions.End_Error;
 135    Data_Error   : exception renames IO_Exceptions.Data_Error;
 136
 137 private
 138    type File_Type is new System.Direct_IO.File_Type;
 139
 140    Bytes : constant Interfaces.C_Streams.size_t :=
 141              Element_Type'Max_Size_In_Storage_Elements;
 142    --  Size of an element in storage units
 143
 144    pragma Inline (Close);
 145    pragma Inline (Create);
 146    pragma Inline (Delete);
 147    pragma Inline (End_Of_File);
 148    pragma Inline (Form);
 149    pragma Inline (Index);
 150    pragma Inline (Is_Open);
 151    pragma Inline (Mode);
 152    pragma Inline (Name);
 153    pragma Inline (Open);
 154    pragma Inline (Read);
 155    pragma Inline (Reset);
 156    pragma Inline (Set_Index);
 157    pragma Inline (Size);
 158    pragma Inline (Write);
 159
 160 end Ada.Direct_IO;