1------------------------------------------------------------------------------ 2-- -- 3-- GNAT LIBRARY COMPONENTS -- 4-- -- 5-- G N A T . C R C 3 2 -- 6-- -- 7-- B o d y -- 8-- -- 9-- Copyright (C) 2001-2010, AdaCore -- 10-- -- 11-- GNAT is free software; you can redistribute it and/or modify it under -- 12-- terms of the GNU General Public License as published by the Free Soft- -- 13-- ware Foundation; either version 3, or (at your option) any later ver- -- 14-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 15-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 16-- or FITNESS FOR A PARTICULAR PURPOSE. -- 17-- -- 18-- As a special exception under Section 7 of GPL version 3, you are granted -- 19-- additional permissions described in the GCC Runtime Library Exception, -- 20-- version 3.1, as published by the Free Software Foundation. -- 21-- -- 22-- You should have received a copy of the GNU General Public License and -- 23-- a copy of the GCC Runtime Library Exception along with this program; -- 24-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- 25-- <http://www.gnu.org/licenses/>. -- 26-- -- 27-- GNAT was originally developed by the GNAT team at New York University. -- 28-- Extensive contributions were provided by Ada Core Technologies Inc. -- 29-- -- 30------------------------------------------------------------------------------ 31 32with Ada.Unchecked_Conversion; 33 34package body GNAT.CRC32 is 35 36 ------------ 37 -- Update -- 38 ------------ 39 40 procedure Update (C : in out CRC32; Value : String) is 41 begin 42 for K in Value'Range loop 43 Update (C, Value (K)); 44 end loop; 45 end Update; 46 47 procedure Update (C : in out CRC32; Value : Ada.Streams.Stream_Element) is 48 function To_Char is new Ada.Unchecked_Conversion 49 (Ada.Streams.Stream_Element, Character); 50 V : constant Character := To_Char (Value); 51 begin 52 Update (C, V); 53 end Update; 54 55 procedure Update 56 (C : in out CRC32; 57 Value : Ada.Streams.Stream_Element_Array) 58 is 59 begin 60 for K in Value'Range loop 61 Update (C, Value (K)); 62 end loop; 63 end Update; 64 65 ----------------- 66 -- Wide_Update -- 67 ----------------- 68 69 procedure Wide_Update (C : in out CRC32; Value : Wide_Character) is 70 subtype S2 is String (1 .. 2); 71 function To_S2 is new Ada.Unchecked_Conversion (Wide_Character, S2); 72 VS : constant S2 := To_S2 (Value); 73 begin 74 Update (C, VS (1)); 75 Update (C, VS (2)); 76 end Wide_Update; 77 78 procedure Wide_Update (C : in out CRC32; Value : Wide_String) is 79 begin 80 for K in Value'Range loop 81 Wide_Update (C, Value (K)); 82 end loop; 83 end Wide_Update; 84 85end GNAT.CRC32; 86