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nsSJISProber.h
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00037 
00038 // for S-JIS encoding, obeserve characteristic:
00039 // 1, kana character (or hankaku?) often have hight frequency of appereance
00040 // 2, kana character often exist in group
00041 // 3, certain combination of kana is never used in japanese language
00042 
00043 #ifndef nsSJISProber_h__
00044 #define nsSJISProber_h__
00045 
00046 #include "nsCharSetProber.h"
00047 #include "nsCodingStateMachine.h"
00048 #include "JpCntx.h"
00049 #include "CharDistribution.h"
00050 
00051 
00052 class nsSJISProber: public nsCharSetProber {
00053 public:
00054   nsSJISProber(void){mCodingSM = new nsCodingStateMachine(&SJISSMModel);
00055                       Reset();};
00056   virtual ~nsSJISProber(void){delete mCodingSM;};
00057   nsProbingState HandleData(const char* aBuf, PRUint32 aLen);
00058   const char* GetCharSetName() {return "Shift_JIS";};
00059   nsProbingState GetState(void) {return mState;};
00060   void      Reset(void);
00061   float     GetConfidence(void);
00062   void      SetOpion() {};
00063 
00064 protected:
00065   nsCodingStateMachine* mCodingSM;
00066   nsProbingState mState;
00067 
00068   SJISContextAnalysis mContextAnalyser;
00069   SJISDistributionAnalysis mDistributionAnalyser;
00070 
00071   char mLastChar[2];
00072 
00073 };
00074 
00075 
00076 #endif /* nsSJISProber_h__ */
00077