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0001 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
0002 /* ***** BEGIN LICENSE BLOCK *****
0003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
0004  *
0005  * The contents of this file are subject to the Mozilla Public License Version
0006  * 1.1 (the "License"); you may not use this file except in compliance with
0007  * the License. You may obtain a copy of the License at
0008  * http://www.mozilla.org/MPL/
0009  *
0010  * Software distributed under the License is distributed on an "AS IS" basis,
0011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
0012  * for the specific language governing rights and limitations under the
0013  * License.
0014  *
0015  * The Original Code is mozilla.org code.
0016  *
0017  * The Initial Developer of the Original Code is
0018  * Netscape Communications Corporation.
0019  * Portions created by the Initial Developer are Copyright (C) 1998
0020  * the Initial Developer. All Rights Reserved.
0021  *
0022  * Contributor(s):
0023  *
0024  * Alternatively, the contents of this file may be used under the terms of
0025  * either the GNU General Public License Version 2 or later (the "GPL"), or
0026  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
0027  * in which case the provisions of the GPL or the LGPL are applicable instead
0028  * of those above. If you wish to allow use of your version of this file only
0029  * under the terms of either the GPL or the LGPL, and not to allow others to
0030  * use your version of this file under the terms of the MPL, indicate your
0031  * decision by deleting the provisions above and replace them with the notice
0032  * and other provisions required by the GPL or the LGPL. If you do not delete
0033  * the provisions above, a recipient may use your version of this file under
0034  * the terms of any one of the MPL, the GPL or the LGPL.
0035  *
0036  * ***** END LICENSE BLOCK ***** */
0037 
0038 #pragma GCC visibility push(hidden)
0039 
0040 #include "nsEUCTWProber.h"
0041 
0042 void  nsEUCTWProber::Reset(void)
0043 {
0044   mCodingSM->Reset(); 
0045   mState = eDetecting;
0046   mDistributionAnalyser.Reset();
0047   //mContextAnalyser.Reset();
0048 }
0049 
0050 nsProbingState nsEUCTWProber::HandleData(const char* aBuf, PRUint32 aLen)
0051 {
0052   nsSMState codingState;
0053 
0054   for (PRUint32 i = 0; i < aLen; i++)
0055   {
0056     codingState = mCodingSM->NextState(aBuf[i]);
0057     if (codingState == eError)
0058     {
0059       mState = eNotMe;
0060       break;
0061     }
0062     if (codingState == eItsMe)
0063     {
0064       mState = eFoundIt;
0065       break;
0066     }
0067     if (codingState == eStart)
0068     {
0069       PRUint32 charLen = mCodingSM->GetCurrentCharLen();
0070 
0071       if (i == 0)
0072       {
0073         mLastChar[1] = aBuf[0];
0074         mDistributionAnalyser.HandleOneChar(mLastChar, charLen);
0075       }
0076       else
0077         mDistributionAnalyser.HandleOneChar(aBuf+i-1, charLen);
0078     }
0079   }
0080 
0081   mLastChar[0] = aBuf[aLen-1];
0082 
0083   if (mState == eDetecting)
0084     if (mDistributionAnalyser.GotEnoughData() && GetConfidence() > SHORTCUT_THRESHOLD)
0085       mState = eFoundIt;
0086 //    else
0087 //      mDistributionAnalyser.HandleData(aBuf, aLen);
0088 
0089   return mState;
0090 }
0091 
0092 float nsEUCTWProber::GetConfidence(void)
0093 {
0094   float distribCf = mDistributionAnalyser.GetConfidence();
0095 
0096   return (float)distribCf;
0097 }
0098 
0099 #pragma GCC visibility pop
0100