------------------------------------------------------------------------------ -- -- -- GNAT LIBRARY COMPONENTS -- -- -- -- G N A T . C R C 3 2 -- -- -- -- B o d y -- -- -- -- Copyright (C) 2001-2002 Ada Core Technologies, 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 2, 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. See the GNU General Public License -- -- for more details. You should have received a copy of the GNU General -- -- Public License distributed with GNAT; see file COPYING. If not, write -- -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- -- MA 02111-1307, USA. -- -- -- -- As a special exception, if other files instantiate generics from this -- -- unit, or you link this unit with other files to produce an executable, -- -- this unit does not by itself cause the resulting executable to be -- -- covered by the GNU General Public License. This exception does not -- -- however invalidate any other reasons why the executable file might be -- -- covered by the GNU Public License. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ with Unchecked_Conversion; package body GNAT.CRC32 is ------------ -- Update -- ------------ procedure Update (C : in out CRC32; Value : String) is begin for K in Value'Range loop Update (C, Value (K)); end loop; end Update; procedure Update (C : in out CRC32; Value : Ada.Streams.Stream_Element) is function To_Char is new Unchecked_Conversion (Ada.Streams.Stream_Element, Character); V : constant Character := To_Char (Value); begin Update (C, V); end Update; procedure Update (C : in out CRC32; Value : Ada.Streams.Stream_Element_Array) is begin for K in Value'Range loop Update (C, Value (K)); end loop; end Update; ----------------- -- Wide_Update -- ----------------- procedure Wide_Update (C : in out CRC32; Value : Wide_Character) is subtype S2 is String (1 .. 2); function To_S2 is new Unchecked_Conversion (Wide_Character, S2); VS : constant S2 := To_S2 (Value); begin Update (C, VS (1)); Update (C, VS (2)); end Wide_Update; procedure Wide_Update (C : in out CRC32; Value : Wide_String) is begin for K in Value'Range loop Wide_Update (C, Value (K)); end loop; end Wide_Update; end GNAT.CRC32;