Aegisub/aegisub/universalchardet/nsEUCTWProber.cpp

97 lines
2.9 KiB
C++

/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
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* the License. You may obtain a copy of the License at
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*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
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* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
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* ***** END LICENSE BLOCK ***** */
#include "nsEUCTWProber.h"
void nsEUCTWProber::Reset(void)
{
mCodingSM->Reset();
mState = eDetecting;
mDistributionAnalyser.Reset();
//mContextAnalyser.Reset();
}
nsProbingState nsEUCTWProber::HandleData(const char* aBuf, PRUint32 aLen)
{
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)
{
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;
// else
// mDistributionAnalyser.HandleData(aBuf, aLen);
return mState;
}
float nsEUCTWProber::GetConfidence(void)
{
float distribCf = mDistributionAnalyser.GetConfidence();
return (float)distribCf;
}