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106 lines
3.4 KiB
C++
106 lines
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; 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 Communicator client 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) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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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 of the GNU General Public License Version 2 or later (the "GPL"),
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* or 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 nsUCS2BEToUnicode_h___
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#define nsUCS2BEToUnicode_h___
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#include "nsISupports.h"
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#include "nsUCSupport.h"
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// internal base class
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class nsUTF16ToUnicodeBase : public nsBasicDecoderSupport
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{
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protected:
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// ctor accessible only by child classes
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nsUTF16ToUnicodeBase() { Reset();}
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public:
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//--------------------------------------------------------------------
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// Subclassing of nsDecoderSupport class [declaration]
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NS_IMETHOD GetMaxLength(const char * aSrc, PRInt32 aSrcLength,
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PRInt32 * aDestLength);
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NS_IMETHOD Reset();
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protected:
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PRUint8 mState;
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// to store an odd byte left over between runs
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PRUint8 mOddByte;
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// to store an odd high surrogate left over between runs
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PRUnichar mOddHighSurrogate;
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// to store an odd low surrogate left over between runs
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PRUnichar mOddLowSurrogate;
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};
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// UTF-16 big endian
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class nsUTF16BEToUnicode : public nsUTF16ToUnicodeBase
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{
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public:
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NS_IMETHOD Convert(const char * aSrc, PRInt32 * aSrcLength,
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PRUnichar * aDest, PRInt32 * aDestLength);
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};
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// UTF-16 little endian
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class nsUTF16LEToUnicode : public nsUTF16ToUnicodeBase
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{
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public:
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NS_IMETHOD Convert(const char * aSrc, PRInt32 * aSrcLength,
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PRUnichar * aDest, PRInt32 * aDestLength);
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};
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// UTF-16 with BOM
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class nsUTF16ToUnicode : public nsUTF16ToUnicodeBase
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{
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public:
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nsUTF16ToUnicode() { Reset();}
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NS_IMETHOD Convert(const char * aSrc, PRInt32 * aSrcLength,
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PRUnichar * aDest, PRInt32 * aDestLength);
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NS_IMETHOD Reset();
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private:
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enum Endian {kUnknown, kBigEndian, kLittleEndian};
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Endian mEndian;
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PRBool mFoundBOM;
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};
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#endif /* nsUCS2BEToUnicode_h___ */
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