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37 :
38 : /**
39 : * A character set converter from Unicode to GBK.
40 : *
41 : *
42 : * @created 08/Sept/1999
43 : * @author Yueheng Xu, Yueheng.Xu@intel.com
44 : */
45 :
46 : #ifndef nsUnicodeToGBK_h___
47 : #define nsUnicodeToGBK_h___
48 :
49 : #include "nsUCSupport.h"
50 : #include "nsCOMPtr.h"
51 : #include "nsIUnicodeEncoder.h"
52 : #include "gbku.h"
53 : //----------------------------------------------------------------------
54 : // Class nsUnicodeToGBK [declaration]
55 :
56 : class nsUnicodeToGBK: public nsEncoderSupport
57 : {
58 : public:
59 :
60 : /**
61 : * Class constructor.
62 : */
63 : nsUnicodeToGBK(PRUint32 aMaxLengthFactor = 2);
64 30 : virtual ~nsUnicodeToGBK() {}
65 :
66 : protected:
67 :
68 : //--------------------------------------------------------------------
69 : // Subclassing of nsEncoderSupport class [declaration]
70 : NS_IMETHOD ConvertNoBuff(const PRUnichar * aSrc,
71 : PRInt32 * aSrcLength,
72 : char * aDest,
73 : PRInt32 * aDestLength);
74 :
75 0 : NS_IMETHOD ConvertNoBuffNoErr(const PRUnichar * aSrc, PRInt32 * aSrcLength,
76 : char * aDest, PRInt32 * aDestLength)
77 : {
78 0 : return NS_OK;
79 : } // just make it not abstract;
80 :
81 : virtual void CreateExtensionEncoder();
82 : virtual void Create4BytesEncoder();
83 :
84 : nsCOMPtr<nsIUnicodeEncoder> mExtensionEncoder;
85 : nsCOMPtr<nsIUnicodeEncoder> m4BytesEncoder;
86 : protected:
87 : PRUnichar mSurrogateHigh;
88 : nsGBKConvUtil mUtil;
89 : bool TryExtensionEncoder(PRUnichar aChar, char* aDest, PRInt32* aOutLen);
90 : bool Try4BytesEncoder(PRUnichar aChar, char* aDest, PRInt32* aOutLen);
91 : virtual bool EncodeSurrogate(PRUnichar aSurrogateHigh, PRUnichar aSurrogateLow, char* aDest);
92 : };
93 :
94 : class nsUnicodeToGB18030: public nsUnicodeToGBK
95 : {
96 : public:
97 3 : nsUnicodeToGB18030() : nsUnicodeToGBK(4) {}
98 12 : virtual ~nsUnicodeToGB18030() {}
99 : protected:
100 : virtual void CreateExtensionEncoder();
101 : virtual void Create4BytesEncoder();
102 : virtual bool EncodeSurrogate(PRUnichar aSurrogateHigh, PRUnichar aSurrogateLow, char* aDest);
103 : };
104 :
105 : #endif /* nsUnicodeToGBK_h___ */
106 :
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