1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
5 -- I N T E R F A C E S . C . P O I N T E R S --
9 -- Copyright (C) 1993-2004 Free Software Foundation, Inc. --
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. --
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, 59 Temple Place - Suite 330, Boston, --
24 -- MA 02111-1307, USA. --
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. --
33 -- GNAT was originally developed by the GNAT team at New York University. --
34 -- Extensive contributions were provided by Ada Core Technologies Inc. --
36 ------------------------------------------------------------------------------
40 type Element
is private;
41 type Element_Array
is array (Index
range <>) of aliased Element
;
42 Default_Terminator
: Element
;
44 package Interfaces
.C
.Pointers
is
45 pragma Preelaborate
(Pointers
);
47 type Pointer
is access all Element
;
49 pragma No_Strict_Aliasing
(Pointer
);
50 -- We turn off any strict aliasing assumptions for the pointer type,
51 -- since it is possible to create "improperly" aliased values.
55 Terminator
: Element
:= Default_Terminator
) return Element_Array
;
59 Length
: ptrdiff_t
) return Element_Array
;
61 Pointer_Error
: exception;
63 --------------------------------
64 -- C-style Pointer Arithmetic --
65 --------------------------------
67 function "+" (Left
: Pointer
; Right
: ptrdiff_t
) return Pointer
;
68 function "+" (Left
: ptrdiff_t
; Right
: Pointer
) return Pointer
;
69 function "-" (Left
: Pointer
; Right
: ptrdiff_t
) return Pointer
;
70 function "-" (Left
: Pointer
; Right
: Pointer
) return ptrdiff_t
;
72 procedure Increment
(Ref
: in out Pointer
);
73 procedure Decrement
(Ref
: in out Pointer
);
75 pragma Convention
(Intrinsic
, "+");
76 pragma Convention
(Intrinsic
, "-");
77 pragma Convention
(Intrinsic
, Increment
);
78 pragma Convention
(Intrinsic
, Decrement
);
80 function Virtual_Length
82 Terminator
: Element
:= Default_Terminator
) return ptrdiff_t
;
84 procedure Copy_Terminated_Array
87 Limit
: ptrdiff_t
:= ptrdiff_t
'Last;
88 Terminator
: Element
:= Default_Terminator
);
98 pragma Inline
(Decrement
);
99 pragma Inline
(Increment
);
101 end Interfaces
.C
.Pointers
;