1 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* This Source Code Form is subject to the terms of the Mozilla Public
3  * License, v. 2.0. If a copy of the MPL was not distributed with this
4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5 
6 // for S-JIS encoding, obeserve characteristic:
7 // 1, kana character (or hankaku?) often have hight frequency of appereance
8 // 2, kana character often exist in group
9 // 3, certain combination of kana is never used in japanese language
10 
11 #ifndef nsSJISProber_h__
12 #define nsSJISProber_h__
13 
14 #include "nsCharSetProber.h"
15 #include "nsCodingStateMachine.h"
16 #include "JpCntx.h"
17 #include "CharDistribution.h"
18 
19 
20 class nsSJISProber: public nsCharSetProber {
21 public:
nsSJISProber(bool aIsPreferredLanguage)22   nsSJISProber(bool aIsPreferredLanguage)
23     :mIsPreferredLanguage(aIsPreferredLanguage)
24   {mCodingSM = new nsCodingStateMachine(&SJISSMModel);
25     Reset();}
~nsSJISProber(void)26   virtual ~nsSJISProber(void){delete mCodingSM;}
27   nsProbingState HandleData(const char* aBuf, uint32_t aLen);
GetCharSetName()28   const char* GetCharSetName() {return "Shift_JIS";}
GetState(void)29   nsProbingState GetState(void) {return mState;}
30   void      Reset(void);
31   float     GetConfidence(void);
32 
33 protected:
34   nsCodingStateMachine* mCodingSM;
35   nsProbingState mState;
36 
37   SJISContextAnalysis mContextAnalyser;
38   SJISDistributionAnalysis mDistributionAnalyser;
39 
40   char mLastChar[2];
41   bool mIsPreferredLanguage;
42 
43 };
44 
45 
46 #endif /* nsSJISProber_h__ */
47 
48