1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
------------------------------------------------------------------------------
-- --
-- GNAT LIBRARY COMPONENTS --
-- --
-- G N A T . C R C 3 2 --
-- --
-- B o d y --
-- --
-- Copyright (C) 2001-2010, 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 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. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- 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 --
-- <http://www.gnu.org/licenses/>. --
-- --
-- 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;
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 Ada.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 Ada.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;
|
