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 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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  * The Original Code is Mozilla Communicator client code.
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 #pragma GCC visibility push(hidden)
 
 #include "CharDistribution.h"
 
 #include "JISFreq.tab"
 #include "Big5Freq.tab"
 #include "EUCKRFreq.tab"
 #include "EUCTWFreq.tab"
 #include "GB2312Freq.tab"
 
 #define SURE_YES 0.99f
 #define SURE_NO  0.01f
 
 //return confidence base on received data
 float CharDistributionAnalysis::GetConfidence()
 { 
   //if we didn't receive any character in our consideration range, return negative answer
   if (mTotalChars <= 0)
     return SURE_NO;
 
   if (mTotalChars != mFreqChars) {
     float r = mFreqChars / ((mTotalChars - mFreqChars) * mTypicalDistributionRatio);
 
     if (r < SURE_YES)
       return r;
   }
   //normalize confidence, (we don't want to be 100% sure)
   return SURE_YES;
 }
 
 EUCTWDistributionAnalysis::EUCTWDistributionAnalysis()
 {
   mCharToFreqOrder = EUCTWCharToFreqOrder;
   mTableSize = EUCTW_TABLE_SIZE;
   mTypicalDistributionRatio = EUCTW_TYPICAL_DISTRIBUTION_RATIO;
 }
 
 EUCKRDistributionAnalysis::EUCKRDistributionAnalysis()
 {
   mCharToFreqOrder = EUCKRCharToFreqOrder;
   mTableSize = EUCKR_TABLE_SIZE;
   mTypicalDistributionRatio = EUCKR_TYPICAL_DISTRIBUTION_RATIO;
 }
 
 GB2312DistributionAnalysis::GB2312DistributionAnalysis()
 {
   mCharToFreqOrder = GB2312CharToFreqOrder;
   mTableSize = GB2312_TABLE_SIZE;
   mTypicalDistributionRatio = GB2312_TYPICAL_DISTRIBUTION_RATIO;
 }
 
 Big5DistributionAnalysis::Big5DistributionAnalysis()
 {
   mCharToFreqOrder = Big5CharToFreqOrder;
   mTableSize = BIG5_TABLE_SIZE;
   mTypicalDistributionRatio = BIG5_TYPICAL_DISTRIBUTION_RATIO;
 }
 
 SJISDistributionAnalysis::SJISDistributionAnalysis()
 {
   mCharToFreqOrder = JISCharToFreqOrder;
   mTableSize = JIS_TABLE_SIZE;
   mTypicalDistributionRatio = JIS_TYPICAL_DISTRIBUTION_RATIO;
 }
 
 EUCJPDistributionAnalysis::EUCJPDistributionAnalysis()
 {
   mCharToFreqOrder = JISCharToFreqOrder;
   mTableSize = JIS_TABLE_SIZE;
   mTypicalDistributionRatio = JIS_TYPICAL_DISTRIBUTION_RATIO;
 }
 
 #pragma GCC visibility pop