77 lines
3.1 KiB
C
77 lines
3.1 KiB
C
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/* -*- 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 nsCharSetProber_h__
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#define nsCharSetProber_h__
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#include "nscore.h"
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//#define DEBUG_chardet // Uncomment this for debug dump.
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typedef enum {
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eDetecting = 0, //We are still detecting, no sure answer yet, but caller can ask for confidence.
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eFoundIt = 1, //That's a positive answer
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eNotMe = 2 //Negative answer
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} nsProbingState;
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#define SHORTCUT_THRESHOLD (float)0.95
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class nsCharSetProber {
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public:
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virtual ~nsCharSetProber() {};
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virtual const char* GetCharSetName() = 0;
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virtual nsProbingState HandleData(const char* aBuf, PRUint32 aLen) = 0;
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virtual nsProbingState GetState(void) = 0;
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virtual void Reset(void) = 0;
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virtual float GetConfidence(void) = 0;
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virtual void SetOpion() = 0;
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#ifdef DEBUG_chardet
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virtual void DumpStatus() {};
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#endif
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// Helper functions used in the Latin1 and Group probers.
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// both functions Allocate a new buffer for newBuf. This buffer should be
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// freed by the caller using PR_FREEIF.
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// Both functions return PR_FALSE in case of memory allocation failure.
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static PRBool FilterWithoutEnglishLetters(const char* aBuf, PRUint32 aLen, char** newBuf, PRUint32& newLen);
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static PRBool FilterWithEnglishLetters(const char* aBuf, PRUint32 aLen, char** newBuf, PRUint32& newLen);
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};
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#endif /* nsCharSetProber_h__ */
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