uchardet-enhanced / libcharsetdetect / mozilla / extensions / universalchardet / src / base / nsEUCJPProber.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 nsEUCJPProber_h__
#define nsEUCJPProber_h__

#include "nsCharSetProber.h"
#include "nsCodingStateMachine.h"
#include "JpCntx.h"
#include "CharDistribution.h"

class nsEUCJPProber: public nsCharSetProber {
  nsEUCJPProber(PRBool aIsPreferredLanguage)
  {mCodingSM = new nsCodingStateMachine(&EUCJPSMModel);
  virtual ~nsEUCJPProber(void){delete mCodingSM;}
  nsProbingState HandleData(const char* aBuf, PRUint32 aLen);
  const char* GetCharSetName() {return "EUC-JP";}
  nsProbingState GetState(void) {return mState;}
  void      Reset(void);
  float     GetConfidence(void);
  void      SetOpion() {}

  nsCodingStateMachine* mCodingSM;
  nsProbingState mState;

  EUCJPContextAnalysis mContextAnalyser;
  EUCJPDistributionAnalysis mDistributionAnalyser;

  char mLastChar[2];
  PRBool mIsPreferredLanguage;

#endif /* nsEUCJPProber_h__ */