intl/uconv/ucvcn/nsGBKToUnicode.h
author ffxbld
Wed, 03 Nov 2010 11:16:45 -0700
branchGECKO20b7pre_20101029_RELBRANCH
changeset 56846 4665267772dbe78eafe6039e2cc2847f8cd0601c
parent 731 bf26dee46a0a67175575b2ff6897dae6123ebf8d
child 79146 e7854b4d29ba905ae3994f821b160c989bac4260
permissions -rw-r--r--
Added tag FENNEC_4_0b2_RELEASE for changeset ec7521865660. CLOSED TREE

/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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#ifndef nsGBK2312ToUnicode_h___
#define nsGBK2312ToUnicode_h___

#include "nsCOMPtr.h"
#include "nsIUnicodeDecoder.h"
#include "nsUCSupport.h"
#include "gbku.h"

//----------------------------------------------------------------------
// Class nsGBKToUnicode [declaration]

/**
 * A character set converter from GBK to Unicode.
 * 
 *
 * @created         07/Sept/1999
 * @author  Yueheng Xu, Yueheng.Xu@intel.com
 */
class nsGBKToUnicode : public nsBufferDecoderSupport
{
public:
		  
  /**
   * Class constructor.
   */
  nsGBKToUnicode() : nsBufferDecoderSupport(1)
  {
    mExtensionDecoder = nsnull;
    m4BytesDecoder = nsnull;
  }

protected:

  //--------------------------------------------------------------------
  // Subclassing of nsDecoderSupport class [declaration]
  NS_IMETHOD ConvertNoBuff(const char* aSrc, PRInt32 * aSrcLength, PRUnichar *aDest, PRInt32 * aDestLength);

protected:
  nsGBKConvUtil mUtil;
  nsCOMPtr<nsIUnicodeDecoder> mExtensionDecoder;
  nsCOMPtr<nsIUnicodeDecoder> m4BytesDecoder;

  virtual void CreateExtensionDecoder();
  virtual void Create4BytesDecoder();
  PRBool TryExtensionDecoder(const char* aSrc, PRUnichar* aDest);
  PRBool Try4BytesDecoder(const char* aSrc, PRUnichar* aDest);
  virtual PRBool DecodeToSurrogate(const char* aSrc, PRUnichar* aDest);

};


class nsGB18030ToUnicode : public nsGBKToUnicode
{
public:
  nsGB18030ToUnicode() {}
  virtual ~nsGB18030ToUnicode() {}
protected:
  virtual void CreateExtensionDecoder();
  virtual void Create4BytesDecoder();
  virtual PRBool DecodeToSurrogate(const char* aSrc, PRUnichar* aDest);
};

#endif /* nsGBK2312ToUnicode_h___ */