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Diffstat (limited to 'src/ext/libcharsetdetect/mozilla/extensions/universalchardet/src/base/nsSBCharSetProber.h')
| -rw-r--r-- | src/ext/libcharsetdetect/mozilla/extensions/universalchardet/src/base/nsSBCharSetProber.h | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/src/ext/libcharsetdetect/mozilla/extensions/universalchardet/src/base/nsSBCharSetProber.h b/src/ext/libcharsetdetect/mozilla/extensions/universalchardet/src/base/nsSBCharSetProber.h new file mode 100644 index 0000000..da943d2 --- /dev/null +++ b/src/ext/libcharsetdetect/mozilla/extensions/universalchardet/src/base/nsSBCharSetProber.h @@ -0,0 +1,129 @@ +/* -*- 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 + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * http://www.mozilla.org/MPL/ + * + * 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 Universal charset detector code. + * + * The Initial Developer of the Original Code is + * Netscape Communications Corporation. + * Portions created by the Initial Developer are Copyright (C) 2001 + * the Initial Developer. All Rights Reserved. + * + * Contributor(s): + * Shy Shalom <shooshX@gmail.com> + * + * 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 + * of those above. If you wish to allow use of your version of this file only + * under the terms of either the GPL or the LGPL, and not to allow others to + * use your version of this file under the terms of the MPL, indicate your + * decision by deleting the provisions above and replace them with the notice + * and other provisions required by the GPL or the LGPL. If you do not delete + * the provisions above, a recipient may use your version of this file under + * the terms of any one of the MPL, the GPL or the LGPL. + * + * ***** END LICENSE BLOCK ***** */ +#ifndef nsSingleByteCharSetProber_h__ +#define nsSingleByteCharSetProber_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 + +typedef struct +{ + const unsigned char* const charToOrderMap; // [256] table use to find a char's order + const PRUint8* const precedenceMatrix; // [SAMPLE_SIZE][SAMPLE_SIZE]; table to find a 2-char sequence's frequency + float mTypicalPositiveRatio; // = freqSeqs / totalSeqs + PRBool keepEnglishLetter; // says if this script contains English characters (not implemented) + const char* const charsetName; + const char* const langName; +} SequenceModel; + + +class nsSingleByteCharSetProber : public nsCharSetProber{ +public: + nsSingleByteCharSetProber(const SequenceModel *model) + :mModel(model), mReversed(PR_FALSE), mNameProber(0) { Reset(); } + nsSingleByteCharSetProber(const SequenceModel *model, PRBool reversed, nsCharSetProber* nameProber) + :mModel(model), mReversed(reversed), mNameProber(nameProber) { Reset(); } + + virtual const char* GetCharSetName(); + virtual const char* GetLangName() {return mModel?mModel->langName:"";} + virtual nsProbingState HandleData(const char* aBuf, PRUint32 aLen); + virtual nsProbingState GetState(void) {return mState;} + virtual void Reset(void); + virtual float GetConfidence(void); + virtual void SetOpion() {} + + virtual PRBool KeepEnglishLetters() {return mModel->keepEnglishLetter;} + +#ifdef DEBUG_chardet + virtual void DumpStatus(); +#endif + +protected: + nsProbingState mState; + const SequenceModel* const mModel; + const PRBool mReversed; // PR_TRUE if we need to reverse every pair in the model lookup + + //char order of last character + unsigned char mLastOrder; + + PRUint32 mTotalSeqs; + PRUint32 mSeqCounters[NUMBER_OF_SEQ_CAT]; + + PRUint32 mTotalChar; + //characters that fall in our sampling range + PRUint32 mFreqChar; + + // Optional auxiliary prober for name decision. created and destroyed by the GroupProber + nsCharSetProber* mNameProber; + +}; + + +extern const SequenceModel Koi8rModel; +extern const SequenceModel Win1251Model; +extern const SequenceModel Latin5Model; +extern const SequenceModel MacCyrillicModel; +extern const SequenceModel Ibm866Model; +extern const SequenceModel Ibm855Model; +extern const SequenceModel ISO_8859_7greekModel; +extern const SequenceModel WINDOWS_1253greekModel; +extern const SequenceModel Latin5BulgarianModel; +extern const SequenceModel Win1251BulgarianModel; +extern const SequenceModel Latin2HungarianModel; +extern const SequenceModel Win1250HungarianModel; +extern const SequenceModel Win1255Model; +extern const SequenceModel TIS620ThaiModel; +extern const SequenceModel WINDOWS_1252frenchModel; +extern const SequenceModel WINDOWS_1252germanModel; +extern const SequenceModel WINDOWS_1252swedishModel; +extern const SequenceModel ISO_8859_9turkishModel; +extern const SequenceModel WINDOWS_1252finnishModel; +extern const SequenceModel windows_1252spanishModel; +extern const SequenceModel iso_8859_2czechModel; +extern const SequenceModel iso_8859_2polishModel; + +#endif /* nsSingleByteCharSetProber_h__ */ + |