------------------------------------------------------------------------------ -- -- -- GNAT RUN-TIME COMPONENTS -- -- -- -- S Y S T E M . M E M O R Y _ C O M P A R E -- -- -- -- B o d y -- -- -- -- 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. -- -- -- ------------------------------------------------------------------------------ with Ada.Unchecked_Conversion; with Interfaces.C; use Interfaces.C; package body System.Memory_Compare is subtype mem is char_array (size_t); type memptr is access mem; function to_memptr is new Ada.Unchecked_Conversion (Address, memptr); ------------ -- memcmp -- ------------ function memcmp (S1 : Address; S2 : Address; N : size_t) return int is s1_p : constant memptr := to_memptr (S1); s2_p : constant memptr := to_memptr (S2); begin if N = 0 then return 0; end if; for J in 0 .. N - 1 loop if s1_p (J) < s2_p (J) then return -1; elsif s1_p (J) > s2_p (J) then return 1; end if; end loop; return 0; end memcmp; end System.Memory_Compare;