1 ------------------------------------------------------------------------------
3 -- GNAT LIBRARY COMPONENTS --
5 -- G N A T . C R C 3 2 --
9 -- Copyright (C) 2001-2002 Ada Core Technologies, Inc. --
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 2, 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. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
32 ------------------------------------------------------------------------------
34 with Unchecked_Conversion;
36 package body GNAT.CRC32 is
42 procedure Update (C : in out CRC32; Value : String) is
44 for K in Value'Range loop
45 Update (C, Value (K));
49 procedure Update (C : in out CRC32; Value : Ada.Streams.Stream_Element) is
50 function To_Char is new Unchecked_Conversion
51 (Ada.Streams.Stream_Element, Character);
53 V : constant Character := To_Char (Value);
61 Value : Ada.Streams.Stream_Element_Array)
64 for K in Value'Range loop
65 Update (C, Value (K));
73 procedure Wide_Update (C : in out CRC32; Value : Wide_Character) is
74 subtype S2 is String (1 .. 2);
75 function To_S2 is new Unchecked_Conversion (Wide_Character, S2);
77 VS : constant S2 := To_S2 (Value);
84 procedure Wide_Update (C : in out CRC32; Value : Wide_String) is
86 for K in Value'Range loop
87 Wide_Update (C, Value (K));