1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
5 -- S Y S T E M . S T O R A G E _ E L E M E N T S --
9 -- Copyright (C) 1992-2007, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 2, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
32 ------------------------------------------------------------------------------
34 pragma Warnings
(Off
);
38 with Ada
.Unchecked_Conversion
;
40 package body System
.Storage_Elements
is
42 pragma Suppress
(All_Checks
);
44 function To_Address
is
45 new Ada
.Unchecked_Conversion
(Storage_Offset
, Address
);
47 new Ada
.Unchecked_Conversion
(Address
, Storage_Offset
);
49 -- Conversion to/from integers
50 -- Those functions must be place first because they are inlined_always
51 -- and are used in other subprograms defined in this unit.
53 function To_Integer
(Value
: Address
) return Integer_Address
is
55 return Integer_Address
(Value
);
58 function To_Address
(Value
: Integer_Address
) return Address
is
60 return Address
(Value
);
65 function "+" (Left
: Address
; Right
: Storage_Offset
) return Address
is
67 return To_Address
(To_Integer
(Left
) + To_Integer
(To_Address
(Right
)));
70 function "+" (Left
: Storage_Offset
; Right
: Address
) return Address
is
72 return To_Address
(To_Integer
(To_Address
(Left
)) + To_Integer
(Right
));
75 function "-" (Left
: Address
; Right
: Storage_Offset
) return Address
is
77 return To_Address
(To_Integer
(Left
) - To_Integer
(To_Address
(Right
)));
80 function "-" (Left
, Right
: Address
) return Storage_Offset
is
82 return To_Offset
(To_Address
(To_Integer
(Left
) - To_Integer
(Right
)));
87 Right
: Storage_Offset
) return Storage_Offset
92 (To_Integer
(Left
) mod Integer_Address
(Right
));
94 return -Storage_Offset
95 ((-To_Integer
(Left
)) mod Integer_Address
(-Right
));
98 end System
.Storage_Elements
;