gcc/ada/s-sequio.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUNTIME COMPONENTS                          --
   4 --                                                                          --
   5 --                 S Y S T E M . S E Q U E N T I A L _ I O                  --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --                                                                          --
  10 --        Copyright (C) 1992,1993,1994 Free Software Foundation, Inc.       --
  11 --                                                                          --
  12 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  13 -- terms of the  GNU General Public License as published  by the Free Soft- --
  14 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  15 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  16 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  17 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  18 -- for  more details.  You should have  received  a copy of the GNU General --
  19 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  20 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  21 -- MA 02111-1307, USA.                                                      --
  22 --                                                                          --
  23 -- As a special exception,  if other files  instantiate  generics from this --
  24 -- unit, or you link  this unit with other files  to produce an executable, --
  25 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  26 -- covered  by the  GNU  General  Public  License.  This exception does not --
  27 -- however invalidate  any other reasons why  the executable file  might be --
  28 -- covered by the  GNU Public License.                                      --
  29 --                                                                          --
  30 -- GNAT was originally developed  by the GNAT team at  New York University. --
  31 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  32 --                                                                          --
  33 ------------------------------------------------------------------------------
  34
  35 --  This package contains the declaration of the control block used for
  36 --  Seqential_IO. This must be declared at the outer library level. It also
  37 --  contains code that is shared between instances of Sequential_IO.
  38
  39 with System.File_Control_Block;
  40 with Ada.Streams;
  41
  42 package System.Sequential_IO is
  43
  44    package FCB renames System.File_Control_Block;
  45
  46    type Sequential_AFCB is new FCB.AFCB with null record;
  47    --  No additional fields required for Sequential_IO
  48
  49    function AFCB_Allocate
  50      (Control_Block : Sequential_AFCB)
  51       return          FCB.AFCB_Ptr;
  52
  53    procedure AFCB_Close (File : access Sequential_AFCB);
  54    procedure AFCB_Free  (File : access Sequential_AFCB);
  55
  56    procedure Read
  57      (File : in out Sequential_AFCB;
  58       Item : out Ada.Streams.Stream_Element_Array;
  59       Last : out Ada.Streams.Stream_Element_Offset);
  60    --  Required overriding of Read, not actually used for Sequential_IO
  61
  62    procedure Write
  63      (File : in out Sequential_AFCB;
  64       Item : in Ada.Streams.Stream_Element_Array);
  65    --  Required overriding of Write, not actually used for Sequential_IO
  66
  67    type File_Type is access all Sequential_AFCB;
  68    --  File_Type in individual instantiations is derived from this type
  69
  70    procedure Create
  71      (File : in out File_Type;
  72       Mode : in FCB.File_Mode := FCB.Out_File;
  73       Name : in String := "";
  74       Form : in String := "");
  75
  76    procedure Open
  77      (File : in out File_Type;
  78       Mode : in FCB.File_Mode;
  79       Name : in String;
  80       Form : in String := "");
  81
  82 end System.Sequential_IO;