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 /* -*- 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.org code.
  *
  * The Initial Developer of the Original Code is
  * Netscape Communications Corporation.
  * Portions created by the Initial Developer are Copyright (C) 1998
  * the Initial Developer. All Rights Reserved.
  *
  * Contributor(s):
  *
  * 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
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  * the provisions above, a recipient may use your version of this file under
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  * ***** END LICENSE BLOCK ***** */
 
 #pragma GCC visibility push(hidden)
 
 #include "nsUTF8Prober.h"
 
 void  nsUTF8Prober::Reset(void)
 {
   mCodingSM->Reset(); 
   mNumOfMBChar = 0;
   mState = eDetecting;
 }
 
 nsProbingState nsUTF8Prober::HandleData(const char* aBuf, PRUint32 aLen)
 {
   nsSMState codingState;
 
   for (PRUint32 i = 0; i < aLen; i++)
   {
     codingState = mCodingSM->NextState(aBuf[i]);
     if (codingState == eError)
     {
       mState = eNotMe;
       break;
     }
     if (codingState == eItsMe)
     {
       mState = eFoundIt;
       break;
     }
     if (codingState == eStart)
     {
       if (mCodingSM->GetCurrentCharLen() >= 2)
         mNumOfMBChar++;
     }
   }
 
   if (mState == eDetecting)
     if (GetConfidence() > SHORTCUT_THRESHOLD)
       mState = eFoundIt;
   return mState;
 }
 
 #define ONE_CHAR_PROB   (float)0.50
 
 float nsUTF8Prober::GetConfidence(void)
 {
   float unlike = (float)0.99;
 
   if (mNumOfMBChar < 6)
   {
     for (PRUint32 i = 0; i < mNumOfMBChar; i++)
       unlike *= ONE_CHAR_PROB;
     return (float)1.0 - unlike;
   }
   else
     return (float)0.99;
 }
 
 #pragma GCC visibility pop