103 lines
4.6 KiB
Ada
103 lines
4.6 KiB
Ada
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------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- I N T E R F A C E S . C . P O I N T E R S --
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-- --
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-- S p e c --
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-- --
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-- Copyright (C) 1993-2011, Free Software Foundation, Inc. --
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-- --
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-- This specification is derived from the Ada Reference Manual for use with --
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-- GNAT. The copyright notice above, and the license provisions that follow --
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-- apply solely to the contents of the part following the private keyword. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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with System.Parameters;
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generic
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type Index is (<>);
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type Element is private;
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type Element_Array is array (Index range <>) of aliased Element;
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Default_Terminator : Element;
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package Interfaces.C.Pointers is
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pragma Preelaborate;
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type Pointer is access all Element;
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for Pointer'Size use System.Parameters.ptr_bits;
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pragma No_Strict_Aliasing (Pointer);
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-- We turn off any strict aliasing assumptions for the pointer type,
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-- since it is possible to create "improperly" aliased values.
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function Value
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(Ref : Pointer;
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Terminator : Element := Default_Terminator) return Element_Array;
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function Value
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(Ref : Pointer;
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Length : ptrdiff_t) return Element_Array;
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Pointer_Error : exception;
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--------------------------------
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-- C-style Pointer Arithmetic --
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--------------------------------
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function "+" (Left : Pointer; Right : ptrdiff_t) return Pointer;
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function "+" (Left : ptrdiff_t; Right : Pointer) return Pointer;
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function "-" (Left : Pointer; Right : ptrdiff_t) return Pointer;
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function "-" (Left : Pointer; Right : Pointer) return ptrdiff_t;
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procedure Increment (Ref : in out Pointer);
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procedure Decrement (Ref : in out Pointer);
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pragma Convention (Intrinsic, "+");
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pragma Convention (Intrinsic, "-");
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pragma Convention (Intrinsic, Increment);
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pragma Convention (Intrinsic, Decrement);
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function Virtual_Length
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(Ref : Pointer;
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Terminator : Element := Default_Terminator) return ptrdiff_t;
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procedure Copy_Terminated_Array
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(Source : Pointer;
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Target : Pointer;
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Limit : ptrdiff_t := ptrdiff_t'Last;
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Terminator : Element := Default_Terminator);
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procedure Copy_Array
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(Source : Pointer;
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Target : Pointer;
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Length : ptrdiff_t);
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private
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pragma Inline ("+");
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pragma Inline ("-");
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pragma Inline (Decrement);
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pragma Inline (Increment);
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end Interfaces.C.Pointers;
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