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nsGBKToUnicode.h
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00001 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
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00015  * The Original Code is mozilla.org code.
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00017  * The Initial Developer of the Original Code is
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00019  * Portions created by the Initial Developer are Copyright (C) 1998
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00024  * Alternatively, the contents of this file may be used under the terms of
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00037 #ifndef nsGBK2312ToUnicode_h___
00038 #define nsGBK2312ToUnicode_h___
00039 
00040 #include "nsCOMPtr.h"
00041 #include "nsIUnicodeDecoder.h"
00042 #include "nsUCSupport.h"
00043 #include "gbku.h"
00044 
00045 //----------------------------------------------------------------------
00046 // Class nsGBKToUnicode [declaration]
00047 
00055 class nsGBKToUnicode : public nsBufferDecoderSupport
00056 {
00057 public:
00058                 
00062   nsGBKToUnicode() : nsBufferDecoderSupport(1)
00063   {
00064     mExtensionDecoder = nsnull;
00065     m4BytesDecoder = nsnull;
00066   };
00067 
00068 protected:
00069 
00070   //--------------------------------------------------------------------
00071   // Subclassing of nsDecoderSupport class [declaration]
00072   NS_IMETHOD ConvertNoBuff(const char* aSrc, PRInt32 * aSrcLength, PRUnichar *aDest, PRInt32 * aDestLength);
00073 
00074 protected:
00075   nsGBKConvUtil mUtil;
00076   nsCOMPtr<nsIUnicodeDecoder> mExtensionDecoder;
00077   nsCOMPtr<nsIUnicodeDecoder> m4BytesDecoder;
00078 
00079   virtual void CreateExtensionDecoder();
00080   virtual void Create4BytesDecoder();
00081   PRBool TryExtensionDecoder(const char* aSrc, PRUnichar* aDest);
00082   PRBool Try4BytesDecoder(const char* aSrc, PRUnichar* aDest);
00083   virtual PRBool DecodeToSurrogate(const char* aSrc, PRUnichar* aDest);
00084 
00085 };
00086 
00087 
00088 class nsGB18030ToUnicode : public nsGBKToUnicode
00089 {
00090 public:
00091   nsGB18030ToUnicode() {};
00092   virtual ~nsGB18030ToUnicode() {};
00093 protected:
00094   virtual void CreateExtensionDecoder();
00095   virtual void Create4BytesDecoder();
00096   virtual PRBool DecodeToSurrogate(const char* aSrc, PRUnichar* aDest);
00097 };
00098 
00099 #endif /* nsGBK2312ToUnicode_h___ */
00100