check in for Xu, Yueheng <yueheng.xu@intel.com>

intl/uconv/ucvcn/nsUnicodeToHZ.cpp

@@ -15,3 +15,191 @@
  * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
  * Reserved.
  */
+ /**
+ * A character set converter from Unicode to HZ.
+ * 
+ *
+ * @created         08/Sept/1999
+ * @author  Yueheng Xu, Yueheng.Xu@intel.com
+ */
+
+#include "nsUnicodeToHZ.h"
+#include "nsUCvCnDll.h"
+
+
+#define _GBKU_TABLE_		// to use a shared GBKU table
+#include "gbku.h"
+
+//----------------------------------------------------------------------
+// Global functions and data [declaration]
+
+//----------------------------------------------------------------------
+// Class nsUnicodeToGBK [implementation]
+
+
+#define TRUE 1
+#define FALSE 0
+
+void nsUnicodeToHZ::UnicodeToHZ(PRUnichar SrcUnicode, DByte *pGBCode)
+{
+	short int iRet = FALSE;
+	short int i = 0;
+	short int iGBKToUnicodeIndex = 0;
+
+
+	for ( i=0; i<MAX_GBK_LENGTH; i++)
+	{
+		if ( SrcUnicode == GBKToUnicodeTable[i] )
+		{
+			iGBKToUnicodeIndex = i;
+			iRet = TRUE;
+			break;
+		}
+	}
+
+	if ( iRet )
+	{
+		//convert from one dimensional index to (left, right) pair
+		if(pGBCode)
+		{
+		pGBCode->leftbyte =  (char) ( iGBKToUnicodeIndex / 0x00BF + 0x0081);
+		pGBCode->rightbyte = (char) ( iGBKToUnicodeIndex % 0x00BF+ 0x0040);
+		}
+	}
+
+
+}
+
+
+NS_IMETHODIMP nsUnicodeToHZ::ConvertNoBuff(const PRUnichar * aSrc, 
+										PRInt32 * aSrcLength, 
+										char * aDest, 
+										PRInt32 * aDestLength)
+{
+#define HZ_STATE_GB		1
+#define HZ_STATE_ASCII	2
+#define HZ_STATE_TILD	3
+#define HZLEAD1 '~'
+#define HZLEAD2 '{'
+#define HZLEAD3 '}'
+#define UNICODE_TILD	0x007E
+
+	static	int hz_state = HZ_STATE_ASCII;	// per HZ spec, default to HZ mode
+	PRInt32 i=0;
+	PRInt32 iSrcLength = *aSrcLength;
+    DByte *pDestDBCode;
+    //    DByte *pSrcDBCode; 
+	PRInt32 iDestLength = 0;
+
+	PRUnichar *pSrc = (PRUnichar *)aSrc;
+
+	pDestDBCode = (DByte *)aDest;
+
+    for (i=0;i< iSrcLength;i++)
+	{
+		pDestDBCode = (DByte *)aDest;
+
+		if( (*pSrc) & 0xff00 )
+		{
+		// hi byte has something, it is not ASCII, must be a GB
+
+			if ( hz_state != HZ_STATE_GB )
+			{
+				// we are adding a '~{' ESC sequence to star a HZ string
+				hz_state = HZ_STATE_GB;
+				pDestDBCode->leftbyte  = '~';
+				pDestDBCode->rightbyte = '{';
+				aDest += 2;	// increment 2 bytes
+				pDestDBCode = (DByte *)aDest;
+				iDestLength +=2;
+			}
+
+			UnicodeToHZ( *pSrc, pDestDBCode);
+			aDest += 2;	// increment 2 bytes
+			pDestDBCode = (DByte *)aDest;
+			iDestLength +=2;
+		}
+		else
+		{
+		// this is an ASCII
+
+			// if we are in HZ mode, end it by adding a '~}' ESC sequence
+			if ( hz_state == HZ_STATE_GB )
+			{
+				hz_state = HZ_STATE_ASCII;
+				pDestDBCode->leftbyte  = '~';
+				pDestDBCode->rightbyte = '}';
+				aDest += 2;	// increment 2 bytes
+				pDestDBCode = (DByte *)aDest;
+				iDestLength +=2;
+			}
+
+			// if this is a regular char '~' , convert it to two '~'
+			if ( *pSrc == UNICODE_TILD )
+			{
+				pDestDBCode->leftbyte  = '~';
+				pDestDBCode->rightbyte = '~';
+				aDest += 2;	// increment 2 bytes
+				pDestDBCode = (DByte *)aDest;
+				iDestLength +=2;
+			}
+			else 
+			{
+			// other regular ASCII chars convert by normal ways
+			
+				// Is this works for both little endian and big endian machines ?
+				*aDest = (char) ( (PRUnichar)(*pSrc) );
+
+				aDest++; // increment 1 byte
+				iDestLength +=1;
+			}
+		}
+		pSrc++;	 // increment 2 bytes
+
+		if ( iDestLength >= (*aDestLength) )
+		{
+			break;
+		}
+	}
+
+	*aDestLength = iDestLength;
+	*aSrcLength = i;
+
+    return NS_OK;
+}
+
+
+NS_IMETHODIMP nsUnicodeToHZ::FillInfo(PRUint32 *aInfo)
+{
+   return NS_OK;
+}
+
+nsresult nsUnicodeToHZ::CreateInstance(nsISupports ** aResult) 
+{
+  nsIUnicodeEncoder *p = new nsUnicodeToHZ();
+  if(p) {
+   *aResult = p;
+   return NS_OK;
+  }
+  return NS_ERROR_OUT_OF_MEMORY;
+}
+
+//----------------------------------------------------------------------
+// Subclassing of nsTableEncoderSupport class [implementation]
+
+NS_IMETHODIMP nsUnicodeToHZ::GetMaxLength(const PRUnichar * aSrc, 
+                                              PRInt32 aSrcLength,
+                                              PRInt32 * aDestLength)
+{
+  *aDestLength = 6 * aSrcLength;
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsUnicodeToHZ::ConvertNoBuffNoErr(
+                                     const PRUnichar * aSrc, 
+                                     PRInt32 * aSrcLength, 
+                                     char * aDest, 
+                                     PRInt32 * aDestLength)
+{
+  return NS_OK;
+}

intl/uconv/ucvcn/nsUnicodeToHZ.h

@@ -15,3 +15,68 @@
  * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
  * Reserved.
  */
+
+ /**
+ * A character set converter from Unicode to GBK.
+ * 
+ *
+ * @created         08/Sept/1999
+ * @author  Yueheng Xu, Yueheng.Xu@intel.com
+ */
+
+#ifndef nsUnicodeToHZ_h___
+#define nsUnicodeToHZ_h___
+
+#include "nsUCvCnSupport.h"
+
+//----------------------------------------------------------------------
+// Class nsUnicodeToHZ [declaration]
+
+class nsUnicodeToHZ: public nsEncoderSupport
+{
+public:
+
+  /**
+   * Class constructor.
+   */
+  nsUnicodeToHZ(){};
+  virtual ~nsUnicodeToHZ(){};
+
+  /**
+   * Static class constructor.
+   */
+  static nsresult CreateInstance(nsISupports **aResult);
+
+
+protected:
+
+  //--------------------------------------------------------------------
+  // Subclassing of nsEncoderSupport class [declaration]
+  NS_IMETHOD ConvertNoBuff(const PRUnichar * aSrc, 
+                            PRInt32 * aSrcLength, 
+                            char * aDest, 
+                            PRInt32 * aDestLength);
+
+  NS_IMETHOD ConvertNoBuffNoErr( const PRUnichar * aSrc, 
+                                 PRInt32 * aSrcLength, 
+                                 char * aDest, 
+                                 PRInt32 * aDestLength);
+
+  NS_IMETHOD FillInfo(PRUint32 *aInfo);
+
+  NS_IMETHOD GetMaxLength(const PRUnichar * aSrc, PRInt32 aSrcLength, 
+      PRInt32 * aDestLength);
+
+private:
+
+typedef struct
+{
+    char leftbyte;
+    char rightbyte;
+
+} DByte;
+  void UnicodeToHZ(PRUnichar SrcUnicode, DByte *pGBCode);
+
+};
+
+#endif /* nsUnicodeToHZ_h___ */