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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- I N T E R F A C E S . C . P O I N T E R S --
-- --
-- S p e c --
-- --
-- Copyright (C) 1993-2018, Free Software Foundation, Inc. --
-- --
-- This specification is derived from the Ada Reference Manual for use with --
-- GNAT. The copyright notice above, and the license provisions that follow --
-- apply solely to the contents of the part following the private keyword. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
with System.Parameters;
generic
type Index is (<>);
type Element is private;
type Element_Array is array (Index range <>) of aliased Element;
Default_Terminator : Element;
package Interfaces.C.Pointers is
pragma Preelaborate;
type Pointer is access all Element;
for Pointer'Size use System.Parameters.ptr_bits;
pragma No_Strict_Aliasing (Pointer);
-- We turn off any strict aliasing assumptions for the pointer type,
-- since it is possible to create "improperly" aliased values.
function Value
(Ref : Pointer;
Terminator : Element := Default_Terminator) return Element_Array;
function Value
(Ref : Pointer;
Length : ptrdiff_t) return Element_Array;
Pointer_Error : exception;
--------------------------------
-- C-style Pointer Arithmetic --
--------------------------------
function "+" (Left : Pointer; Right : ptrdiff_t) return Pointer;
function "+" (Left : ptrdiff_t; Right : Pointer) return Pointer;
function "-" (Left : Pointer; Right : ptrdiff_t) return Pointer;
function "-" (Left : Pointer; Right : Pointer) return ptrdiff_t;
procedure Increment (Ref : in out Pointer);
procedure Decrement (Ref : in out Pointer);
pragma Convention (Intrinsic, "+");
pragma Convention (Intrinsic, "-");
pragma Convention (Intrinsic, Increment);
pragma Convention (Intrinsic, Decrement);
function Virtual_Length
(Ref : Pointer;
Terminator : Element := Default_Terminator) return ptrdiff_t;
procedure Copy_Terminated_Array
(Source : Pointer;
Target : Pointer;
Limit : ptrdiff_t := ptrdiff_t'Last;
Terminator : Element := Default_Terminator);
procedure Copy_Array
(Source : Pointer;
Target : Pointer;
Length : ptrdiff_t);
private
pragma Inline ("+");
pragma Inline ("-");
pragma Inline (Decrement);
pragma Inline (Increment);
end Interfaces.C.Pointers;
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