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 --          Copyright (C) 1992-2009, 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 3,  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.                                     --
  21 --                                                                          --
  22 -- As a special exception under Section 7 of GPL version 3, you are granted --
  23 -- additional permissions described in the GCC Runtime Library Exception,   --
  24 -- version 3.1, as published by the Free Software Foundation.               --
  25 --                                                                          --
  26 -- You should have received a copy of the GNU General Public License and    --
  27 -- a copy of the GCC Runtime Library Exception along with this program;     --
  28 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  29 -- <http://www.gnu.org/licenses/>.                                          --
  30 --                                                                          --
  31 -- GNAT was originally developed  by the GNAT team at  New York University. --
  32 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  33 --                                                                          --
  34 ------------------------------------------------------------------------------
  35
  36 package Ada.Streams is
  37    pragma Pure;
  38
  39    type Root_Stream_Type is abstract tagged limited private;
  40    pragma Preelaborable_Initialization (Root_Stream_Type);
  41
  42    type Stream_Element is mod 2 ** Standard'Storage_Unit;
  43
  44    type Stream_Element_Offset is range
  45      -(2 ** (Standard'Address_Size - 1)) ..
  46      +(2 ** (Standard'Address_Size - 1)) - 1;
  47
  48    subtype Stream_Element_Count is
  49       Stream_Element_Offset range 0 .. Stream_Element_Offset'Last;
  50
  51    type Stream_Element_Array is
  52       array (Stream_Element_Offset range <>) of aliased Stream_Element;
  53
  54    procedure Read
  55      (Stream : in out Root_Stream_Type;
  56       Item   : out Stream_Element_Array;
  57       Last   : out Stream_Element_Offset)
  58    is abstract;
  59
  60    procedure Write
  61      (Stream : in out Root_Stream_Type;
  62       Item   : Stream_Element_Array)
  63    is abstract;
  64
  65 private
  66
  67    type Root_Stream_Type is abstract tagged limited null record;
  68
  69 end Ada.Streams;