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nsEUCJPProber.h

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00001 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /*  -*- C++ -*-
00003 *  Copyright (C) 1998 <developer@mozilla.org>
00004 *
00005 *
00006 *  Permission is hereby granted, free of charge, to any person obtaining
00007 *  a copy of this software and associated documentation files (the
00008 *  "Software"), to deal in the Software without restriction, including
00009 *  without limitation the rights to use, copy, modify, merge, publish,
00010 *  distribute, sublicense, and/or sell copies of the Software, and to
00011 *  permit persons to whom the Software is furnished to do so, subject to
00012 *  the following conditions:
00013 *
00014 *  The above copyright notice and this permission notice shall be included 
00015 *  in all copies or substantial portions of the Software.
00016 *
00017 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00018 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00019 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00020 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00021 *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00022 *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00023 *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00024 */
00025 
00026 // for S-JIS encoding, obeserve characteristic:
00027 // 1, kana character (or hankaku?) often have hight frequency of appereance
00028 // 2, kana character often exist in group
00029 // 3, certain combination of kana is never used in japanese language
00030 
00031 #ifndef nsEUCJPProber_h__
00032 #define nsEUCJPProber_h__
00033 
00034 #include "nsCharSetProber.h"
00035 #include "nsCodingStateMachine.h"
00036 #include "JpCntx.h"
00037 #include "CharDistribution.h"
00038 namespace kencodingprober {
00039 class KDE_NO_EXPORT nsEUCJPProber: public nsCharSetProber {
00040 public:
00041   nsEUCJPProber(void){mCodingSM = new nsCodingStateMachine(&EUCJPSMModel);
00042                       Reset();};
00043   virtual ~nsEUCJPProber(void){delete mCodingSM;};
00044   nsProbingState HandleData(const char* aBuf, unsigned int aLen);
00045   const char* GetCharSetName() {return "EUC-JP";};
00046   nsProbingState GetState(void) {return mState;};
00047   void      Reset(void);
00048   float     GetConfidence(void);
00049   void      SetOpion() {};
00050 
00051 protected:
00052   nsCodingStateMachine* mCodingSM;
00053   nsProbingState mState;
00054 
00055   EUCJPContextAnalysis mContextAnalyser;
00056   EUCJPDistributionAnalysis mDistributionAnalyser;
00057 
00058   char mLastChar[2];
00059 };
00060 }
00061 
00062 #endif /* nsEUCJPProber_h__ */
00063 

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