Aegisub/aegisub/universalchardet/nsBig5Prober.cpp

89 lines
2.8 KiB
C++

/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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* The Original Code is mozilla.org code.
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#include "nsBig5Prober.h"
void nsBig5Prober::Reset(void)
{
mCodingSM->Reset();
mState = eDetecting;
mDistributionAnalyser.Reset();
}
nsProbingState nsBig5Prober::HandleData(const char* aBuf, PRUint32 aLen)
{
nsSMState codingState;
for (PRUint32 i = 0; i < aLen; i++)
{
codingState = mCodingSM->NextState(aBuf[i]);
if (codingState == eItsMe)
{
mState = eFoundIt;
break;
}
if (codingState == eStart)
{
PRUint32 charLen = mCodingSM->GetCurrentCharLen();
if (i == 0)
{
mLastChar[1] = aBuf[0];
mDistributionAnalyser.HandleOneChar(mLastChar, charLen);
}
else
mDistributionAnalyser.HandleOneChar(aBuf+i-1, charLen);
}
}
mLastChar[0] = aBuf[aLen-1];
if (mState == eDetecting)
if (mDistributionAnalyser.GotEnoughData() && GetConfidence() > SHORTCUT_THRESHOLD)
mState = eFoundIt;
return mState;
}
float nsBig5Prober::GetConfidence(void)
{
float distribCf = mDistributionAnalyser.GetConfidence(mIsPreferredLanguage);
return (float)distribCf;
}