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