gcc/ada/s-pack40.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUNTIME COMPONENTS                          --
   4 --                                                                          --
   5 --                       S Y S T E M . P A C K _ 4 0                        --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --                                                                          --
  10 --          Copyright (C) 1992-1999 Free Software Foundation, Inc.          --
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  12 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
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  21 -- MA 02111-1307, USA.                                                      --
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  23 -- As a special exception,  if other files  instantiate  generics from this --
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  30 -- GNAT was originally developed  by the GNAT team at  New York University. --
  31 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
  32 --                                                                          --
  33 ------------------------------------------------------------------------------
  34
  35 --  Handling of packed arrays with Component_Size = 40
  36
  37 package System.Pack_40 is
  38 pragma Preelaborate (Pack_40);
  39
  40    Bits : constant := 40;
  41
  42    type Bits_40 is mod 2 ** Bits;
  43    for Bits_40'Size use Bits;
  44
  45    function Get_40 (Arr : System.Address; N : Natural) return Bits_40;
  46    --  Arr is the address of the packed array, N is the zero-based
  47    --  subscript. This element is extracted and returned.
  48
  49    procedure Set_40 (Arr : System.Address; N : Natural; E : Bits_40);
  50    --  Arr is the address of the packed array, N is the zero-based
  51    --  subscript. This element is set to the given value.
  52
  53    function GetU_40 (Arr : System.Address; N : Natural) return Bits_40;
  54    --  Arr is the address of the packed array, N is the zero-based
  55    --  subscript. This element is extracted and returned. This version
  56    --  is used when Arr may represent an unaligned address.
  57
  58    procedure SetU_40 (Arr : System.Address; N : Natural; E : Bits_40);
  59    --  Arr is the address of the packed array, N is the zero-based
  60    --  subscript. This element is set to the given value. This version
  61    --  is used when Arr may represent an unaligned address
  62
  63 end System.Pack_40;