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5a949265d5
This doesn't work for all probers yet, in particular not for the most generic probers (such as UTF-8) or WINDOWS-1252. These will return NULL. It's still a good first step. Right now, it returns the 2-character language code from ISO 639-1. A using project could easily get the English language name from the XML/json files provided by the iso-codes project. This project will also allow to easily localize the language name in other languages through gettext (this is what we do in GIMP for instance). I don't add any dependency though and leave it to downstream projects to implement this. I was also wondering if we want to support region information for cases when it would make sense. I especially wondered about it for Chinese encodings as some of them seem quite specific to a region (according to Wikipedia at least). For the time being though, these just return "zh". We'll see later if it makes sense to be more accurate (maybe depending on reports?).
78 lines
3.1 KiB
C++
78 lines
3.1 KiB
C++
/* -*- 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 const char* GetLanguage() = 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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