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#include "nsEscCharsetProber.h"

#include "nsUniversalDetector.h"

nsEscCharSetProber::nsEscCharSetProber(PRUint32 aLanguageFilter)

{

  for (PRUint32 i = 0; i < NUM_OF_ESC_CHARSETS; i++)

    mCodingSM[i] = nsnull;

  if (aLanguageFilter & NS_FILTER_CHINESE_SIMPLIFIED) 

  {

    mCodingSM[0] = new nsCodingStateMachine(&HZSMModel);

    mCodingSM[1] = new nsCodingStateMachine(&ISO2022CNSMModel);

  }

  if (aLanguageFilter & NS_FILTER_JAPANESE)

    mCodingSM[2] = new nsCodingStateMachine(&ISO2022JPSMModel);

  if (aLanguageFilter & NS_FILTER_KOREAN)

    mCodingSM[3] = new nsCodingStateMachine(&ISO2022KRSMModel);

  mActiveSM = NUM_OF_ESC_CHARSETS;

  mState = eDetecting;

  mDetectedCharset = nsnull;

}

nsEscCharSetProber::~nsEscCharSetProber(void)

{

  for (PRUint32 i = 0; i < NUM_OF_ESC_CHARSETS; i++)

    delete mCodingSM[i];

}

void nsEscCharSetProber::Reset(void)

{

  mState = eDetecting;

  for (PRUint32 i = 0; i < NUM_OF_ESC_CHARSETS; i++)

    if (mCodingSM[i])

      mCodingSM[i]->Reset();

  mActiveSM = NUM_OF_ESC_CHARSETS;

  mDetectedCharset = nsnull;

}

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

{

  nsSMState codingState;

  PRInt32 j;

  PRUint32 i;

  for ( i = 0; i < aLen && mState == eDetecting; i++)

  {

    for (j = mActiveSM-1; j>= 0; j--)

    {

      if (mCodingSM[j])

      {

        codingState = mCodingSM[j]->NextState(aBuf[i]);

        if (codingState == eItsMe)

        {

          mState = eFoundIt;

          mDetectedCharset = mCodingSM[j]->GetCodingStateMachine();

          return mState;

        }

      }

    }

  }

  return mState;

}