nsSJISProber.h

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// for S-JIS encoding, obeserve characteristic:
// 1, kana character (or hankaku?) often have hight frequency of appereance
// 2, kana character often exist in group
// 3, certain combination of kana is never used in japanese language
 
#ifndef nsSJISProber_h__
#define nsSJISProber_h__
 
#include "nsCharSetProber.h"
#include "nsCodingStateMachine.h"
#include "JpCntx.h"
#include "CharDistribution.h"
 
namespace kencodingprober {
class KDE_NO_EXPORT nsSJISProber: public nsCharSetProber {
public:
  nsSJISProber(void){mCodingSM = new nsCodingStateMachine(&SJISSMModel);
                      Reset();};
  virtual ~nsSJISProber(void){delete mCodingSM;};
  nsProbingState HandleData(const char* aBuf, unsigned int aLen);
  const char* GetCharSetName() {return "Shift_JIS";};
  nsProbingState GetState(void) {return mState;};
  void      Reset(void);
  float     GetConfidence(void);
  void      SetOpion() {};
 
protected:
  nsCodingStateMachine* mCodingSM;
  nsProbingState mState;
 
  SJISContextAnalysis mContextAnalyser;
  SJISDistributionAnalysis mDistributionAnalyser;
 
  char mLastChar[2];
 
};
}
 
#endif /* nsSJISProber_h__ */