------------------------------------------------------------------------------ -- -- -- GNAT RUN-TIME COMPONENTS -- -- -- -- S Y S T E M . M E M O R Y _ M O V E -- -- -- -- S p e c -- -- -- -- Copyright (C) 2006-2014, Free Software Foundation, Inc. -- -- -- -- 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. -- -- -- -- -- -- -- -- -- -- -- -- 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 -- -- . -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ -- This package provides a general block copy mechanism analogous to that -- provided by the C routine memmove allowing for copies with overlap. pragma Restrictions (No_Elaboration_Code); with Interfaces.C; package System.Memory_Move is pragma Preelaborate; function memmove (Dest : Address; Src : Address; N : Interfaces.C.size_t) return Address; pragma Export (C, memmove, "memmove"); -- Copies N storage units from area starting at Src to area starting -- at Dest without any check for buffer overflow. The difference between -- this memmove and memcpy is that with memmove, the storage areas may -- overlap (forwards or backwards) and the result is correct (i.e. it -- is as if Src is first moved to a temporary area, and then this area -- is copied to Dst in a separate step). end System.Memory_Move;