mirror of
https://gitlab.freedesktop.org/uchardet/uchardet.git
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119fed7e8d
Encodings: ISO-8859-1, ISO-8859-4, ISO-8859-9, ISO-8859-15 and WINDOWS-1252. Test text from https://sv.wikipedia.org/wiki/Mölle
257 lines
9.7 KiB
C++
257 lines
9.7 KiB
C++
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Universal charset detector code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2001
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Shy Shalom <shooshX@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsSingleByteCharSetProber_h__
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#define nsSingleByteCharSetProber_h__
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#include "nsCharSetProber.h"
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/** Codepoints **/
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/* Illegal codepoints.*/
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#define ILL 255
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/* Control character. */
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#define CTR 254
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/* Symbols and punctuation that does not belong to words. */
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#define SYM 253
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/* Return/Line feeds. */
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#define RET 252
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/* Numbers 0-9. */
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#define NUM 251
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#define SB_ENOUGH_REL_THRESHOLD 1024
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#define POSITIVE_SHORTCUT_THRESHOLD (float)0.95
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#define NEGATIVE_SHORTCUT_THRESHOLD (float)0.05
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#define SYMBOL_CAT_ORDER 250
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#define NUMBER_OF_SEQ_CAT 4
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#define POSITIVE_CAT (NUMBER_OF_SEQ_CAT-1)
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#define PROBABLE_CAT (NUMBER_OF_SEQ_CAT-2)
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#define NEUTRAL_CAT (NUMBER_OF_SEQ_CAT-3)
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#define NEGATIVE_CAT 0
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typedef struct
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{
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/* [256] table mapping codepoints to chararacter orders. */
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const unsigned char* const charToOrderMap;
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/* freqCharCount x freqCharCount table of 2-char sequence's frequencies. */
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const PRUint8* const precedenceMatrix;
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/* The count of frequent characters. */
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int freqCharCount;
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float mTypicalPositiveRatio; // = freqSeqs / totalSeqs
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PRBool keepEnglishLetter; // says if this script contains English characters (not implemented)
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const char* const charsetName;
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} SequenceModel;
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class nsSingleByteCharSetProber : public nsCharSetProber{
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public:
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nsSingleByteCharSetProber(const SequenceModel *model)
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:mModel(model), mReversed(PR_FALSE), mNameProber(0) { Reset(); }
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nsSingleByteCharSetProber(const SequenceModel *model, PRBool reversed, nsCharSetProber* nameProber)
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:mModel(model), mReversed(reversed), mNameProber(nameProber) { Reset(); }
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virtual const char* GetCharSetName();
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virtual nsProbingState HandleData(const char* aBuf, PRUint32 aLen);
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virtual nsProbingState GetState(void) {return mState;}
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virtual void Reset(void);
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virtual float GetConfidence(void);
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virtual void SetOpion() {}
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// This feature is not implemented yet. any current language model
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// contain this parameter as PR_FALSE. No one is looking at this
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// parameter or calling this method.
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// Moreover, the nsSBCSGroupProber which calls the HandleData of this
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// prober has a hard-coded call to FilterWithoutEnglishLetters which gets rid
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// of the English letters.
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PRBool KeepEnglishLetters() {return mModel->keepEnglishLetter;} // (not implemented)
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#ifdef DEBUG_chardet
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virtual void DumpStatus();
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#endif
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protected:
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nsProbingState mState;
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const SequenceModel* const mModel;
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const PRBool mReversed; // PR_TRUE if we need to reverse every pair in the model lookup
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//char order of last character
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unsigned char mLastOrder;
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PRUint32 mTotalSeqs;
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PRUint32 mSeqCounters[NUMBER_OF_SEQ_CAT];
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PRUint32 mTotalChar;
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PRUint32 mCtrlChar;
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//characters that fall in our sampling range
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PRUint32 mFreqChar;
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// Optional auxiliary prober for name decision. created and destroyed by the GroupProber
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nsCharSetProber* mNameProber;
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};
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extern const SequenceModel Windows_1256ArabicModel;
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extern const SequenceModel Iso_8859_6ArabicModel;
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extern const SequenceModel Koi8rRussianModel;
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extern const SequenceModel Win1251RussianModel;
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extern const SequenceModel Latin5RussianModel;
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extern const SequenceModel MacCyrillicRussianModel;
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extern const SequenceModel Ibm866RussianModel;
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extern const SequenceModel Ibm855RussianModel;
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extern const SequenceModel Iso_8859_7GreekModel;
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extern const SequenceModel Windows_1253GreekModel;
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extern const SequenceModel Latin5BulgarianModel;
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extern const SequenceModel Win1251BulgarianModel;
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extern const SequenceModel Iso_8859_2HungarianModel;
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extern const SequenceModel Windows_1250HungarianModel;
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extern const SequenceModel Win1255Model;
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extern const SequenceModel Tis_620ThaiModel;
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extern const SequenceModel Iso_8859_11ThaiModel;
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extern const SequenceModel Iso_8859_15FrenchModel;
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extern const SequenceModel Iso_8859_1FrenchModel;
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extern const SequenceModel Windows_1252FrenchModel;
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extern const SequenceModel Iso_8859_15SpanishModel;
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extern const SequenceModel Iso_8859_1SpanishModel;
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extern const SequenceModel Windows_1252SpanishModel;
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extern const SequenceModel Iso_8859_1GermanModel;
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extern const SequenceModel Windows_1252GermanModel;
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extern const SequenceModel Iso_8859_3EsperantoModel;
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extern const SequenceModel Iso_8859_3TurkishModel;
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extern const SequenceModel Iso_8859_9TurkishModel;
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extern const SequenceModel VisciiVietnameseModel;
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extern const SequenceModel Windows_1258VietnameseModel;
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extern const SequenceModel Iso_8859_15DanishModel;
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extern const SequenceModel Iso_8859_1DanishModel;
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extern const SequenceModel Windows_1252DanishModel;
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extern const SequenceModel Iso_8859_13LithuanianModel;
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extern const SequenceModel Iso_8859_10LithuanianModel;
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extern const SequenceModel Iso_8859_4LithuanianModel;
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extern const SequenceModel Iso_8859_13LatvianModel;
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extern const SequenceModel Iso_8859_10LatvianModel;
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extern const SequenceModel Iso_8859_4LatvianModel;
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extern const SequenceModel Iso_8859_1PortugueseModel;
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extern const SequenceModel Iso_8859_9PortugueseModel;
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extern const SequenceModel Iso_8859_15PortugueseModel;
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extern const SequenceModel Windows_1252PortugueseModel;
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extern const SequenceModel Iso_8859_3MalteseModel;
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extern const SequenceModel Windows_1250CzechModel;
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extern const SequenceModel Iso_8859_2CzechModel;
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extern const SequenceModel Ibm852CzechModel;
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extern const SequenceModel Mac_CentraleuropeCzechModel;
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extern const SequenceModel Windows_1250SlovakModel;
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extern const SequenceModel Iso_8859_2SlovakModel;
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extern const SequenceModel Ibm852SlovakModel;
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extern const SequenceModel Mac_CentraleuropeSlovakModel;
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extern const SequenceModel Windows_1250PolishModel;
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extern const SequenceModel Iso_8859_2PolishModel;
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extern const SequenceModel Iso_8859_13PolishModel;
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extern const SequenceModel Iso_8859_16PolishModel;
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extern const SequenceModel Ibm852PolishModel;
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extern const SequenceModel Mac_CentraleuropePolishModel;
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extern const SequenceModel Iso_8859_1FinnishModel;
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extern const SequenceModel Iso_8859_4FinnishModel;
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extern const SequenceModel Iso_8859_9FinnishModel;
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extern const SequenceModel Iso_8859_13FinnishModel;
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extern const SequenceModel Iso_8859_15FinnishModel;
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extern const SequenceModel Windows_1252FinnishModel;
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extern const SequenceModel Iso_8859_1ItalianModel;
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extern const SequenceModel Iso_8859_3ItalianModel;
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extern const SequenceModel Iso_8859_9ItalianModel;
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extern const SequenceModel Iso_8859_15ItalianModel;
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extern const SequenceModel Windows_1252ItalianModel;
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extern const SequenceModel Windows_1250CroatianModel;
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extern const SequenceModel Iso_8859_2CroatianModel;
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extern const SequenceModel Iso_8859_13CroatianModel;
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extern const SequenceModel Iso_8859_16CroatianModel;
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extern const SequenceModel Ibm852CroatianModel;
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extern const SequenceModel Mac_CentraleuropeCroatianModel;
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extern const SequenceModel Windows_1252EstonianModel;
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extern const SequenceModel Windows_1257EstonianModel;
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extern const SequenceModel Iso_8859_4EstonianModel;
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extern const SequenceModel Iso_8859_13EstonianModel;
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extern const SequenceModel Iso_8859_15EstonianModel;
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extern const SequenceModel Iso_8859_15IrishModel;
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extern const SequenceModel Iso_8859_9IrishModel;
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extern const SequenceModel Iso_8859_1IrishModel;
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extern const SequenceModel Windows_1252IrishModel;
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extern const SequenceModel Windows_1250RomanianModel;
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extern const SequenceModel Iso_8859_2RomanianModel;
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extern const SequenceModel Iso_8859_16RomanianModel;
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extern const SequenceModel Ibm852RomanianModel;
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extern const SequenceModel Windows_1250SloveneModel;
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extern const SequenceModel Iso_8859_2SloveneModel;
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extern const SequenceModel Iso_8859_16SloveneModel;
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extern const SequenceModel Ibm852SloveneModel;
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extern const SequenceModel Mac_CentraleuropeSloveneModel;
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extern const SequenceModel Iso_8859_1SwedishModel;
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extern const SequenceModel Iso_8859_4SwedishModel;
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extern const SequenceModel Iso_8859_9SwedishModel;
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extern const SequenceModel Iso_8859_15SwedishModel;
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extern const SequenceModel Windows_1252SwedishModel;
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#endif /* nsSingleByteCharSetProber_h__ */
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