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/* -*- Mode: C++; tab-width: 2; 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.
*/
#include "CharDistribution.h"
#include "tables/JISFreq.tab"
#include "tables/Big5Freq.tab"
#include "tables/EUCKRFreq.tab"
#include "tables/EUCTWFreq.tab"
#include "tables/GB2312Freq.tab"
#define SURE_YES 0.99f
#define SURE_NO 0.01f
namespace qencodingprober {
//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;
}
}
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