toolchain/gcc/gcc/ada/a-sequio.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUNTIME COMPONENTS                          --
   4 --                                                                          --
   5 --                    A D A . S E Q U E N T I A L _ I O                     --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-1997 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.Sequential_IO;
  41
  42 generic
  43    type Element_Type (<>) is private;
  44
  45 package Ada.Sequential_IO is
  46
  47    type File_Type is limited private;
  48
  49    type File_Mode is (In_File, Out_File, Append_File);
  50
  51    --  The following representation clause allows the use of unchecked
  52    --  conversion for rapid translation between the File_Mode type
  53    --  used in this package and System.File_IO.
  54
  55    for File_Mode use
  56      (In_File     => 0,  -- System.FIle_IO.File_Mode'Pos (In_File)
  57       Out_File    => 2,  -- System.File_IO.File_Mode'Pos (Out_File)
  58       Append_File => 3); -- System.File_IO.File_Mode'Pos (Append_File)
  59
  60    ---------------------
  61    -- File management --
  62    ---------------------
  63
  64    procedure Create
  65      (File : in out File_Type;
  66       Mode : in File_Mode := Out_File;
  67       Name : in String := "";
  68       Form : in String := "");
  69
  70    procedure Open
  71      (File : in out File_Type;
  72       Mode : in File_Mode;
  73       Name : in String;
  74       Form : in String := "");
  75
  76    procedure Close  (File : in out File_Type);
  77    procedure Delete (File : in out File_Type);
  78    procedure Reset  (File : in out File_Type; Mode : in File_Mode);
  79    procedure Reset  (File : in out File_Type);
  80
  81    function Mode    (File : in File_Type) return File_Mode;
  82    function Name    (File : in File_Type) return String;
  83    function Form    (File : in File_Type) return String;
  84
  85    function Is_Open (File : in File_Type) return Boolean;
  86
  87    ---------------------------------
  88    -- Input and output operations --
  89    ---------------------------------
  90
  91    procedure Read  (File : in File_Type; Item : out Element_Type);
  92    procedure Write (File : in File_Type; Item : in Element_Type);
  93
  94    function End_Of_File (File : in File_Type) return Boolean;
  95
  96    ----------------
  97    -- Exceptions --
  98    ----------------
  99
 100    Status_Error : exception renames IO_Exceptions.Status_Error;
 101    Mode_Error   : exception renames IO_Exceptions.Mode_Error;
 102    Name_Error   : exception renames IO_Exceptions.Name_Error;
 103    Use_Error    : exception renames IO_Exceptions.Use_Error;
 104    Device_Error : exception renames IO_Exceptions.Device_Error;
 105    End_Error    : exception renames IO_Exceptions.End_Error;
 106    Data_Error   : exception renames IO_Exceptions.Data_Error;
 107
 108 private
 109    type File_Type is new System.Sequential_IO.File_Type;
 110
 111    --  All subprograms are inlined
 112
 113    pragma Inline (Close);
 114    pragma Inline (Create);
 115    pragma Inline (Delete);
 116    pragma Inline (End_Of_File);
 117    pragma Inline (Form);
 118    pragma Inline (Is_Open);
 119    pragma Inline (Mode);
 120    pragma Inline (Name);
 121    pragma Inline (Open);
 122    pragma Inline (Read);
 123    pragma Inline (Reset);
 124    pragma Inline (Write);
 125
 126 end Ada.Sequential_IO;