diff -r 000000000000 -r 6474c204b198 intl/uconv/ucvcn/nsUnicodeToHZ.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/intl/uconv/ucvcn/nsUnicodeToHZ.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,116 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+ /**
+ * A character set converter from Unicode to HZ.
+ * 
+ *
+ * @created         08/Sept/1999
+ * @author  Yueheng Xu, Yueheng.Xu@intel.com
+ * Revision History
+ * 04/Oct/1999. Yueheng Xu: Fixed line continuation problem when line 
+ *                          ended by '~';
+ *              Used table UnicodeToGBK[] to speed up the mapping.
+ */
+#include "nsUnicodeToHZ.h"
+#include "gbku.h"
+//----------------------------------------------------------------------
+// Class nsUnicodeToGBK [implementation]
+#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
+nsUnicodeToHZ::nsUnicodeToHZ() : nsEncoderSupport(6)
+{
+  mHZState = HZ_STATE_ASCII;	// per HZ spec, default to HZ mode
+}
+NS_IMETHODIMP nsUnicodeToHZ::ConvertNoBuff(
+  const char16_t * aSrc, 
+  int32_t * aSrcLength, 
+  char * aDest, 
+  int32_t * aDestLength)
+{
+  int32_t i=0;
+  int32_t iSrcLength = *aSrcLength;
+  int32_t iDestLength = 0;
+
+  for (i=0;i< iSrcLength;i++)
+  {
+    if(! IS_ASCII(*aSrc))
+    {
+      // hi byte has something, it is not ASCII, process as a GB
+      if ( mHZState != HZ_STATE_GB )
+      {
+        // we are adding a '~{' ESC sequence to star a HZ string
+        mHZState = HZ_STATE_GB;
+        aDest[0] = '~';
+        aDest[1] = '{';
+        aDest += 2;	// increment 2 bytes
+        iDestLength +=2;
+      }
+      if(mUtil.UnicodeToGBKChar(*aSrc, true, &aDest[0], &aDest[1])) {
+        aDest += 2;	// increment 2 bytes
+        iDestLength +=2;
+      } else {
+        // some thing that we cannot convert
+        // xxx fix me ftang
+        // error handling here
+      }
+    } else {
+      // this is an ASCII
+
+      // if we are in HZ mode, end it by adding a '~}' ESC sequence
+      if ( mHZState == HZ_STATE_GB )
+      {
+        mHZState = HZ_STATE_ASCII;
+        aDest[0] = '~';
+        aDest[1] = '}';
+        aDest += 2; // increment 2 bytes
+        iDestLength +=2;
+      }
+          
+      // if this is a regular char '~' , convert it to two '~'
+      if ( *aSrc == UNICODE_TILD )
+      {
+        aDest[0] = '~';
+        aDest[1] = '~';
+        aDest += 2; // increment 2 bytes
+        iDestLength +=2;
+      } else {
+        // other regular ASCII chars convert by normal ways
+	
+        // Is this works for both little endian and big endian machines ?
+        *aDest = (char) ( (char16_t)(*aSrc) );
+        aDest++; // increment 1 byte
+        iDestLength +=1;
+      }
+    }
+    aSrc++;	 // increment 2 bytes
+    if ( iDestLength >= (*aDestLength) )
+    {
+      break;
+    }
+  }
+  *aDestLength = iDestLength;
+  *aSrcLength = i;
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsUnicodeToHZ::FinishNoBuff(char * aDest, int32_t * aDestLength)
+{
+  if ( mHZState == HZ_STATE_GB )
+  {
+    // if we are in HZ mode, end it by adding a '~}' ESC sequence
+    mHZState = HZ_STATE_ASCII;
+    aDest[0] = '~';
+    aDest[1] = '}';
+    *aDestLength = 2;
+  } else {
+    *aDestLength = 0;
+  }
+  return NS_OK;
+}