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nsUTF32ToUnicode.h
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* vim:expandtab:shiftwidth=2:tabstop=2:
00003  */
00004 /* ***** BEGIN LICENSE BLOCK *****
00005  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00006  *
00007  * The contents of this file are subject to the Mozilla Public License Version
00008  * 1.1 (the "License"); you may not use this file except in compliance with
00009  * the License. You may obtain a copy of the License at
00010  * http://www.mozilla.org/MPL/
00011  *
00012  * Software distributed under the License is distributed on an "AS IS" basis,
00013  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00014  * for the specific language governing rights and limitations under the
00015  * License.
00016  *
00017  * The Original Code is Mozilla Communicator client code.
00018  *
00019  * The Initial Developer of the Original Code is
00020  * Netscape Communications Corporation.
00021  * Portions created by the Initial Developer are Copyright (C) 1998
00022  * the Initial Developer. All Rights Reserved.
00023  *
00024  * Contributor(s):
00025  *   Jungshik Shin <jshin@mailaps.org>
00026  *
00027  * Alternatively, the contents of this file may be used under the terms of
00028  * either of the GNU General Public License Version 2 or later (the "GPL"),
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00030  * in which case the provisions of the GPL or the LGPL are applicable instead
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00038  *
00039  * ***** END LICENSE BLOCK ***** */
00040 
00041 #ifndef nsUTF32ToUnicode_h___
00042 #define nsUTF32ToUnicode_h___
00043 
00044 //----------------------------------------------------------------------
00045 // Class nsUTF32ToUnicode [declaration]  
00046 
00054 class nsUTF32ToUnicode : public nsBasicDecoderSupport
00055 {
00056 
00057 public:
00058 
00062   nsUTF32ToUnicode();
00063 
00064 protected:
00065 
00066   // the number of additional bytes to read to complete an incomplete UTF-32 4byte seq.
00067   PRUint16 mState;  
00068   // buffer for an incomplete UTF-32 sequence. 
00069   PRUint8  mBufferInc[4];
00070 
00071   //--------------------------------------------------------------------
00072   // Subclassing of nsBasicDecoderSupport class [declaration]
00073 
00074   NS_IMETHOD GetMaxLength(const char * aSrc, PRInt32 aSrcLength, 
00075                           PRInt32 * aDestLength);
00076 
00077   NS_IMETHOD Reset();
00078 
00079 };
00080 
00081 //----------------------------------------------------------------------
00082 // Class nsUTF32BEToUnicode [declaration]  
00083 
00091 class nsUTF32BEToUnicode : public nsUTF32ToUnicode
00092 {
00093 public:
00094 
00095 
00096   //--------------------------------------------------------------------
00097   // Subclassing of nsBasicDecoderSupport class [declaration]
00098 
00099   NS_IMETHOD Convert(const char * aSrc, PRInt32 * aSrcLength, 
00100                      PRUnichar * aDest, PRInt32 * aDestLength);
00101 
00102 
00103 };
00104 
00105 //----------------------------------------------------------------------
00106 // Class nsUTF32LEToUnicode [declaration]  
00107 
00115 class nsUTF32LEToUnicode : public nsUTF32ToUnicode
00116 {
00117 public:
00118 
00119 
00120   //--------------------------------------------------------------------
00121   // Subclassing of nsBasicDecoderSupport class [declaration]
00122 
00123   NS_IMETHOD Convert(const char * aSrc, PRInt32 * aSrcLength, 
00124                      PRUnichar * aDest, PRInt32 * aDestLength);
00125 
00126 };
00127 
00128 #endif /* nsUTF32ToUnicode_h___ */
00129