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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.
*/
#ifndef NSSBCHARSETPROBER_H
#define NSSBCHARSETPROBER_H
#include "nsCharSetProber.h"
#define SAMPLE_SIZE 64
#define SB_ENOUGH_REL_THRESHOLD 1024
#define POSITIVE_SHORTCUT_THRESHOLD (float)0.95
#define NEGATIVE_SHORTCUT_THRESHOLD (float)0.05
#define SYMBOL_CAT_ORDER 250
#define NUMBER_OF_SEQ_CAT 4
#define POSITIVE_CAT (NUMBER_OF_SEQ_CAT-1)
#define NEGATIVE_CAT 0
namespace qencodingprober {
typedef struct
{
const unsigned char *charToOrderMap; // [256] table use to find a char's order
const char *precedenceMatrix; // [SAMPLE_SIZE][SAMPLE_SIZE]; table to find a 2-char sequence's frequency
float mTypicalPositiveRatio; // = freqSeqs / totalSeqs
bool keepEnglishLetter; // says if this script contains English characters (not implemented)
const char* charsetName;
} SequenceModel;
class nsSingleByteCharSetProber : public nsCharSetProber{
public:
nsSingleByteCharSetProber(SequenceModel *model)
:mModel(model), mReversed(false), mNameProber(0) { Reset(); }
nsSingleByteCharSetProber(SequenceModel *model, bool reversed, nsCharSetProber* nameProber)
:mModel(model), mReversed(reversed), mNameProber(nameProber) { Reset(); }
virtual const char* GetCharSetName();
virtual nsProbingState HandleData(const char* aBuf, unsigned int aLen);
virtual nsProbingState GetState(void) {return mState;};
virtual void Reset(void);
virtual float GetConfidence(void);
virtual void SetOpion() {};
// This feature is not implemented yet. any current language model
// contain this parameter as false. No one is looking at this
// parameter or calling this method.
// Moreover, the nsSBCSGroupProber which calls the HandleData of this
// prober has a hard-coded call to FilterWithoutEnglishLetters which gets rid
// of the English letters.
bool KeepEnglishLetters() {return mModel->keepEnglishLetter;}; // (not implemented)
#ifdef DEBUG_PROBE
virtual void DumpStatus();
#endif
protected:
nsProbingState mState;
const SequenceModel *mModel;
const bool mReversed; // true if we need to reverse every pair in the model lookup
//char order of last character
unsigned char mLastOrder;
unsigned int mTotalSeqs;
unsigned int mSeqCounters[NUMBER_OF_SEQ_CAT];
unsigned int mTotalChar;
//characters that fall in our sampling range
unsigned int mFreqChar;
// Optional auxiliary prober for name decision. created and destroyed by the GroupProber
nsCharSetProber* mNameProber;
};
extern SequenceModel Koi8rModel;
extern SequenceModel Win1251Model;
extern SequenceModel Latin5Model;
extern SequenceModel MacCyrillicModel;
extern SequenceModel Ibm866Model;
extern SequenceModel Ibm855Model;
extern SequenceModel Latin7Model;
extern SequenceModel Win1253Model;
extern SequenceModel Latin5BulgarianModel;
extern SequenceModel Win1251BulgarianModel;
extern SequenceModel Latin2HungarianModel;
extern SequenceModel Win1250HungarianModel;
extern SequenceModel Win1255Model;
}
#endif /* NSSBCHARSETPROBER_H */
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