nsEscCharSetProber Class Reference

#include <nsEscCharsetProber.h>

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Public Member Functions

 nsEscCharSetProber (void)
virtual ~nsEscCharSetProber (void)
nsProbingState HandleData (const char *aBuf, PRUint32 aLen)
const char * GetCharSetName ()
nsProbingState GetState (void)
void Reset (void)
float GetConfidence (void)
void SetOpion ()

Protected Member Functions

void GetDistribution (PRUint32 aCharLen, const char *aStr)

Protected Attributes

nsCodingStateMachine * mCodingSM [NUM_OF_ESC_CHARSETS]
PRUint32 mActiveSM
nsProbingState mState
const char * mDetectedCharset

Detailed Description

Definition at line 46 of file nsEscCharsetProber.h.

Constructor & Destructor Documentation

nsEscCharSetProber::nsEscCharSetProber ( void   ) 

Definition at line 41 of file nsEscCharsetProber.cpp.

References eDetecting, HZSMModel, ISO2022CNSMModel, ISO2022JPSMModel, ISO2022KRSMModel, mActiveSM, mCodingSM, mDetectedCharset, mState, nsnull, and NUM_OF_ESC_CHARSETS.

00042 {
00043   mCodingSM[0] = new nsCodingStateMachine(&HZSMModel);
00044   mCodingSM[1] = new nsCodingStateMachine(&ISO2022CNSMModel);
00045   mCodingSM[2] = new nsCodingStateMachine(&ISO2022JPSMModel);
00046   mCodingSM[3] = new nsCodingStateMachine(&ISO2022KRSMModel);
00047   mActiveSM = NUM_OF_ESC_CHARSETS;
00048   mState = eDetecting;
00049   mDetectedCharset = nsnull;
00050 }

nsEscCharSetProber::~nsEscCharSetProber ( void   )  [virtual]

Definition at line 52 of file nsEscCharsetProber.cpp.

References mCodingSM, and NUM_OF_ESC_CHARSETS.

00053 {
00054   for (PRUint32 i = 0; i < NUM_OF_ESC_CHARSETS; i++)
00055     delete mCodingSM[i];
00056 }

Member Function Documentation

const char* nsEscCharSetProber::GetCharSetName (  )  [inline, virtual]

Implements nsCharSetProber.

Definition at line 51 of file nsEscCharsetProber.h.

References mDetectedCharset.

00051 {return mDetectedCharset;};

float nsEscCharSetProber::GetConfidence ( void   )  [inline, virtual]

Implements nsCharSetProber.

Definition at line 54 of file nsEscCharsetProber.h.

00054 {return (float)0.99;};

void nsEscCharSetProber::GetDistribution ( PRUint32  aCharLen,
const char *  aStr 
) [protected]
nsProbingState nsEscCharSetProber::GetState ( void   )  [inline, virtual]

Implements nsCharSetProber.

Definition at line 52 of file nsEscCharsetProber.h.

References mState.

00052 {return mState;};

nsProbingState nsEscCharSetProber::HandleData ( const char *  aBuf,
PRUint32  aLen 
) [virtual]

Implements nsCharSetProber.

Definition at line 67 of file nsEscCharsetProber.cpp.

References eDetecting, eError, eFoundIt, eItsMe, eNotMe, nsCodingStateMachine::GetCodingStateMachine(), mActiveSM, mCodingSM, mDetectedCharset, mState, and nsCodingStateMachine::NextState().

00068 {
00069   nsSMState codingState;
00070   PRInt32 j;
00071   PRUint32 i;
00072 
00073   for ( i = 0; i < aLen && mState == eDetecting; i++)
00074   {
00075     for (j = mActiveSM-1; j>= 0; j--)
00076     {
00077       //byte is feed to all active state machine 
00078       codingState = mCodingSM[j]->NextState(aBuf[i]);
00079       if (codingState == eError)
00080       {
00081         //got negative answer for this state machine, make it inactive
00082         mActiveSM--;
00083         if (mActiveSM == 0)
00084         {
00085           mState = eNotMe;
00086           return mState;
00087         }
00088         else if (j != (PRInt32)mActiveSM)
00089         {
00090           nsCodingStateMachine* t;
00091           t = mCodingSM[mActiveSM];
00092           mCodingSM[mActiveSM] = mCodingSM[j];
00093           mCodingSM[j] = t;
00094         }
00095       }
00096       else if (codingState == eItsMe)
00097       {
00098         mState = eFoundIt;
00099         mDetectedCharset = mCodingSM[j]->GetCodingStateMachine();
00100         return mState;
00101       }
00102     }
00103   }
00104 
00105   return mState;
00106 }

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void nsEscCharSetProber::Reset ( void   )  [virtual]

Implements nsCharSetProber.

Definition at line 58 of file nsEscCharsetProber.cpp.

References eDetecting, mActiveSM, mCodingSM, mDetectedCharset, mState, nsnull, and NUM_OF_ESC_CHARSETS.

00059 {
00060   mState = eDetecting;
00061   for (PRUint32 i = 0; i < NUM_OF_ESC_CHARSETS; i++)
00062     mCodingSM[i]->Reset();
00063   mActiveSM = NUM_OF_ESC_CHARSETS;
00064   mDetectedCharset = nsnull;
00065 }

void nsEscCharSetProber::SetOpion (  )  [inline, virtual]

Implements nsCharSetProber.

Definition at line 55 of file nsEscCharsetProber.h.

00055 {};

Field Documentation

PRUint32 nsEscCharSetProber::mActiveSM [protected]

Definition at line 61 of file nsEscCharsetProber.h.

Referenced by HandleData(), nsEscCharSetProber(), and Reset().

nsCodingStateMachine* nsEscCharSetProber::mCodingSM[NUM_OF_ESC_CHARSETS] [protected]

Definition at line 60 of file nsEscCharsetProber.h.

Referenced by HandleData(), nsEscCharSetProber(), Reset(), and ~nsEscCharSetProber().

const char* nsEscCharSetProber::mDetectedCharset [protected]

Definition at line 63 of file nsEscCharsetProber.h.

Referenced by GetCharSetName(), HandleData(), nsEscCharSetProber(), and Reset().

nsProbingState nsEscCharSetProber::mState [protected]

Definition at line 62 of file nsEscCharsetProber.h.

Referenced by GetState(), HandleData(), nsEscCharSetProber(), and Reset().

The documentation for this class was generated from the following files:
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