nsUTF8Prober Class Reference

#include <nsUTF8Prober.h>

Inheritance diagram for nsUTF8Prober:

[legend]

Collaboration diagram for nsUTF8Prober:

[legend]

Public Member Functions
	nsUTF8Prober ()
virtual	~nsUTF8Prober ()
nsProbingState	HandleData (const char *aBuf, PRUint32 aLen)
const char *	GetCharSetName ()
nsProbingState	GetState (void)
void	Reset (void)
float	GetConfidence (void)
void	SetOpion ()
Protected Attributes
nsCodingStateMachine *	mCodingSM
nsProbingState	mState
PRUint32	mNumOfMBChar

---

Detailed Description

Definition at line 44 of file nsUTF8Prober.h.

---

Constructor & Destructor Documentation

nsUTF8Prober::nsUTF8Prober

(

)

[inline]

Definition at line 46 of file nsUTF8Prober.h.

References mCodingSM, mNumOfMBChar, Reset(), and UTF8SMModel.

                {mNumOfMBChar = 0; 
                mCodingSM = new nsCodingStateMachine(&UTF8SMModel);
                Reset(); };

Here is the call graph for this function:

virtual nsUTF8Prober::~nsUTF8Prober

(

)

[inline, virtual]

Definition at line 49 of file nsUTF8Prober.h.

References mCodingSM.

{delete mCodingSM;};

---

Member Function Documentation

const char* nsUTF8Prober::GetCharSetName

(

)

[inline, virtual]

Implements nsCharSetProber.

Definition at line 51 of file nsUTF8Prober.h.

{return "UTF-8";};

float nsUTF8Prober::GetConfidence

(

void

)

[virtual]

Implements nsCharSetProber.

Definition at line 79 of file nsUTF8Prober.cpp.

References mNumOfMBChar, and ONE_CHAR_PROB.

Referenced by HandleData().

{
  float unlike = (float)0.99;

  if (mNumOfMBChar < 6)
  {
    for (PRUint32 i = 0; i < mNumOfMBChar; i++)
      unlike *= ONE_CHAR_PROB;
    return (float)1.0 - unlike;
  }
  else
    return (float)0.99;
}

Here is the caller graph for this function:

nsProbingState nsUTF8Prober::GetState

(

void

)

[inline, virtual]

Implements nsCharSetProber.

Definition at line 52 of file nsUTF8Prober.h.

References mState.

{return mState;};

nsProbingState nsUTF8Prober::HandleData	(	const char *	aBuf,
		PRUint32	aLen
	)			[virtual]

Implements nsCharSetProber.

Definition at line 47 of file nsUTF8Prober.cpp.

References eDetecting, eError, eFoundIt, eItsMe, eNotMe, eStart, GetConfidence(), nsCodingStateMachine::GetCurrentCharLen(), mCodingSM, mNumOfMBChar, mState, nsCodingStateMachine::NextState(), and SHORTCUT_THRESHOLD.

{
  nsSMState codingState;

  for (PRUint32 i = 0; i < aLen; i++)
  {
    codingState = mCodingSM->NextState(aBuf[i]);
    if (codingState == eError)
    {
      mState = eNotMe;
      break;
    }
    if (codingState == eItsMe)
    {
      mState = eFoundIt;
      break;
    }
    if (codingState == eStart)
    {
      if (mCodingSM->GetCurrentCharLen() >= 2)
        mNumOfMBChar++;
    }
  }

  if (mState == eDetecting)
    if (GetConfidence() > SHORTCUT_THRESHOLD)
      mState = eFoundIt;
  return mState;
}

Here is the call graph for this function:

void nsUTF8Prober::Reset

(

void

)

[virtual]

Implements nsCharSetProber.

Definition at line 40 of file nsUTF8Prober.cpp.

References eDetecting, mCodingSM, mNumOfMBChar, mState, and nsCodingStateMachine::Reset().

Referenced by nsUTF8Prober().

{
  mCodingSM->Reset(); 
  mNumOfMBChar = 0;
  mState = eDetecting;
}

Here is the call graph for this function:

Here is the caller graph for this function:

void nsUTF8Prober::SetOpion

(

)

[inline, virtual]

Implements nsCharSetProber.

Definition at line 55 of file nsUTF8Prober.h.

{};

---

Field Documentation

nsCodingStateMachine* nsUTF8Prober::mCodingSM [protected]

Definition at line 55 of file nsUTF8Prober.h.

Referenced by HandleData(), nsUTF8Prober(), Reset(), and ~nsUTF8Prober().

PRUint32 nsUTF8Prober::mNumOfMBChar [protected]

Definition at line 60 of file nsUTF8Prober.h.

Referenced by GetConfidence(), HandleData(), nsUTF8Prober(), and Reset().

nsProbingState nsUTF8Prober::mState [protected]

Definition at line 59 of file nsUTF8Prober.h.

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

---

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

• nsUTF8Prober.h
• nsUTF8Prober.cpp