| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT LIBRARY COMPONENTS -- |
| -- -- |
| -- G N A T . C R C 3 2 -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 2001-2005, AdaCore -- |
| -- -- |
| -- 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, 51 Franklin Street, Fifth Floor, -- |
| -- Boston, MA 02110-1301, 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; |
