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) 1992-2006, 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,  51  Franklin  Street,  Fifth  Floor, --
  24 -- Boston, MA 02110-1301, 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 package Ada.Streams is
  39    pragma Pure;
  40
  41    type Root_Stream_Type is abstract tagged limited private;
  42    pragma Preelaborable_Initialization (Root_Stream_Type);
  43
  44    type Stream_Element is mod 2 ** Standard'Storage_Unit;
  45
  46    type Stream_Element_Offset is range
  47      -(2 ** (Standard'Address_Size - 1)) ..
  48      +(2 ** (Standard'Address_Size - 1)) - 1;
  49
  50    subtype Stream_Element_Count is
  51       Stream_Element_Offset range 0 .. Stream_Element_Offset'Last;
  52
  53    type Stream_Element_Array is
  54       array (Stream_Element_Offset range <>) of aliased Stream_Element;
  55
  56    procedure Read
  57      (Stream : in out Root_Stream_Type;
  58       Item   : out Stream_Element_Array;
  59       Last   : out Stream_Element_Offset)
  60    is abstract;
  61
  62    procedure Write
  63      (Stream : in out Root_Stream_Type;
  64       Item   : Stream_Element_Array)
  65    is abstract;
  66
  67 private
  68
  69    type Root_Stream_Type is abstract tagged limited null record;
  70
  71 end Ada.Streams;