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 nsEUCJPProber_h__
12 #define nsEUCJPProber_h__
13 
14 #include "nsCharSetProber.h"
15 #include "nsCodingStateMachine.h"
16 #include "JpCntx.h"
17 #include "CharDistribution.h"
18 
19 class nsEUCJPProber: public nsCharSetProber {
20 public:
nsEUCJPProber(bool aIsPreferredLanguage)21   nsEUCJPProber(bool aIsPreferredLanguage)
22     :mIsPreferredLanguage(aIsPreferredLanguage)
23   {mCodingSM = new nsCodingStateMachine(&EUCJPSMModel);
24     Reset();}
~nsEUCJPProber(void)25   virtual ~nsEUCJPProber(void){delete mCodingSM;}
26   nsProbingState HandleData(const char* aBuf, uint32_t aLen);
GetCharSetName()27   const char* GetCharSetName() {return "EUC-JP";}
GetState(void)28   nsProbingState GetState(void) {return mState;}
29   void      Reset(void);
30   float     GetConfidence(void);
31 
32 protected:
33   nsCodingStateMachine* mCodingSM;
34   nsProbingState mState;
35 
36   EUCJPContextAnalysis mContextAnalyser;
37   EUCJPDistributionAnalysis mDistributionAnalyser;
38 
39   char mLastChar[2];
40   bool mIsPreferredLanguage;
41 };
42 
43 
44 #endif /* nsEUCJPProber_h__ */
45 
46