extensions/universalchardet/src/base/nsEscCharsetProber.cpp

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  37
  38
  39 #include "nsEscCharsetProber.h"
  40 #include "nsUniversalDetector.h"
  41
  42 nsEscCharSetProber::nsEscCharSetProber(PRUint32 aLanguageFilter)
  43 {
  44   for (PRUint32 i = 0; i < NUM_OF_ESC_CHARSETS; i++)
  45     mCodingSM[i] = nsnull;
  46   if (aLanguageFilter & NS_FILTER_CHINESE_SIMPLIFIED)
  47   {
  48     mCodingSM[0] = new nsCodingStateMachine(&HZSMModel);
  49     mCodingSM[1] = new nsCodingStateMachine(&ISO2022CNSMModel);
  50   }
  51   if (aLanguageFilter & NS_FILTER_JAPANESE)
  52     mCodingSM[2] = new nsCodingStateMachine(&ISO2022JPSMModel);
  53   if (aLanguageFilter & NS_FILTER_KOREAN)
  54     mCodingSM[3] = new nsCodingStateMachine(&ISO2022KRSMModel);
  55   mActiveSM = NUM_OF_ESC_CHARSETS;
  56   mState = eDetecting;
  57   mDetectedCharset = nsnull;
  58 }
  59
  60 nsEscCharSetProber::~nsEscCharSetProber(void)
  61 {
  62   for (PRUint32 i = 0; i < NUM_OF_ESC_CHARSETS; i++)
  63     delete mCodingSM[i];
  64 }
  65
  66 void nsEscCharSetProber::Reset(void)
  67 {
  68   mState = eDetecting;
  69   for (PRUint32 i = 0; i < NUM_OF_ESC_CHARSETS; i++)
  70     if (mCodingSM[i])
  71       mCodingSM[i]->Reset();
  72   mActiveSM = NUM_OF_ESC_CHARSETS;
  73   mDetectedCharset = nsnull;
  74 }
  75
  76 nsProbingState nsEscCharSetProber::HandleData(const char* aBuf, PRUint32 aLen)
  77 {
  78   nsSMState codingState;
  79   PRInt32 j;
  80   PRUint32 i;
  81
  82   for ( i = 0; i < aLen && mState == eDetecting; i++)
  83   {
  84     for (j = mActiveSM-1; j>= 0; j--)
  85     {
  86       if (mCodingSM[j])
  87       {
  88         codingState = mCodingSM[j]->NextState(aBuf[i]);
  89         if (codingState == eItsMe)
  90         {
  91           mState = eFoundIt;
  92           mDetectedCharset = mCodingSM[j]->GetCodingStateMachine();
  93           return mState;
  94         }
  95       }
  96     }
  97   }
  98
  99   return mState;
 100 }
 101