gcc/ada/a-stream.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --                          A D A . S T R E A M S                           --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --                            $Revision: 1.9 $                              --
  10 --                                                                          --
  11 --          Copyright (C) 1992-1997 Free Software Foundation, Inc.          --
  12 --                                                                          --
  13 -- This specification is derived from the Ada Reference Manual for use with --
  14 -- GNAT. The copyright notice above, and the license provisions that follow --
  15 -- apply solely to the  contents of the part following the private keyword. --
  16 --                                                                          --
  17 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  18 -- terms of the  GNU General Public License as published  by the Free Soft- --
  19 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  20 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  21 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  22 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  23 -- for  more details.  You should have  received  a copy of the GNU General --
  24 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  25 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  26 -- MA 02111-1307, USA.                                                      --
  27 --                                                                          --
  28 -- As a special exception,  if other files  instantiate  generics from this --
  29 -- unit, or you link  this unit with other files  to produce an executable, --
  30 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  31 -- covered  by the  GNU  General  Public  License.  This exception does not --
  32 -- however invalidate  any other reasons why  the executable file  might be --
  33 -- covered by the  GNU Public License.                                      --
  34 --                                                                          --
  35 -- GNAT was originally developed  by the GNAT team at  New York University. --
  36 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
  37 --                                                                          --
  38 ------------------------------------------------------------------------------
  39
  40
  41 package Ada.Streams is
  42 pragma Pure (Streams);
  43
  44    type Root_Stream_Type is abstract tagged limited private;
  45
  46    type Stream_Element is mod 2 ** Standard'Storage_Unit;
  47
  48    type Stream_Element_Offset is range
  49      -(2 ** (Standard'Address_Size - 1)) ..
  50      +(2 ** (Standard'Address_Size - 1)) - 1;
  51
  52    subtype Stream_Element_Count is
  53       Stream_Element_Offset range 0 .. Stream_Element_Offset'Last;
  54
  55    type Stream_Element_Array is
  56       array (Stream_Element_Offset range <>) of Stream_Element;
  57
  58    procedure Read
  59      (Stream : in out Root_Stream_Type;
  60       Item   : out Stream_Element_Array;
  61       Last   : out Stream_Element_Offset)
  62    is abstract;
  63
  64    procedure Write
  65      (Stream : in out Root_Stream_Type;
  66       Item   : in Stream_Element_Array)
  67    is abstract;
  68
  69 private
  70
  71    type Root_Stream_Type is abstract tagged limited null record;
  72
  73 end Ada.Streams;