gecko/intl/uconv/ucvlatin/nsUCS2BEToUnicode.h

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