blob: f837dd966837b2c53ae1f4f608e9f52b3eb0e709 (
plain)
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
86
87
88
89
90
|
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Shy Shalom <shooshX@gmail.com>
* Kohei TAKETA <k-tak@void.in> (Java port)
* Rudi Pettazzi <rudi.pettazzi@gmail.com> (C# port)
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
namespace UniversalDetector.Core
{
/// <summary>
/// Parallel state machine for the Coding Scheme Method
/// </summary>
public class CodingStateMachine
{
private int currentState;
private SMModel model;
private int currentCharLen;
private int currentBytePos;
public CodingStateMachine(SMModel model)
{
this.currentState = SMModel.START;
this.model = model;
}
public int NextState(byte b)
{
// for each byte we get its class, if it is first byte,
// we also get byte length
int byteCls = model.GetClass(b);
if (currentState == SMModel.START) {
currentBytePos = 0;
currentCharLen = model.charLenTable[byteCls];
}
// from byte's class and stateTable, we get its next state
currentState = model.stateTable.Unpack(
currentState * model.ClassFactor + byteCls);
currentBytePos++;
return currentState;
}
public void Reset()
{
currentState = SMModel.START;
}
public int CurrentCharLen
{
get { return currentCharLen; }
}
public string ModelName
{
get { return model.Name; }
}
}
}
|
