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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* -*- C++ -*-
* Copyright (C) 1998 <developer@mozilla.org>
*
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
// for S-JIS encoding, obeserve characteristic:
// 1, kana character (or hankaku?) often have hight frequency of appereance
// 2, kana character often exist in group
// 3, certain combination of kana is never used in japanese language
#include "nsGB2312Prober.h"
namespace qencodingprober {
void nsGB18030Prober::Reset(void)
{
mCodingSM->Reset();
mState = eDetecting;
mDistributionAnalyser.Reset();
//mContextAnalyser.Reset();
}
nsProbingState nsGB18030Prober::HandleData(const char* aBuf, unsigned int aLen)
{
nsSMState codingState;
for (unsigned int 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)
{
unsigned int 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 nsGB18030Prober::GetConfidence(void)
{
float distribCf = mDistributionAnalyser.GetConfidence();
return (float)distribCf;
}
}
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