diff -r 000000000000 -r 6474c204b198 intl/uconv/ucvcn/nsUnicodeToGBK.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/intl/uconv/ucvcn/nsUnicodeToGBK.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,74 @@
+/* -*- 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 GBK.
+ * 
+ *
+ * @created         08/Sept/1999
+ * @author  Yueheng Xu, Yueheng.Xu@intel.com
+ */
+
+#ifndef nsUnicodeToGBK_h___
+#define nsUnicodeToGBK_h___
+
+#include "nsUCSupport.h"
+#include "nsCOMPtr.h"
+#include "nsIUnicodeEncoder.h"
+#include "nsGBKConvUtil.h"
+//----------------------------------------------------------------------
+// Class nsUnicodeToGBK [declaration]
+
+class nsUnicodeToGBK: public nsEncoderSupport
+{
+public:
+
+  /**
+   * Class constructor.
+   */
+  nsUnicodeToGBK(uint32_t aMaxLengthFactor = 2);
+  virtual ~nsUnicodeToGBK() {}
+
+protected:
+
+  //--------------------------------------------------------------------
+  // Subclassing of nsEncoderSupport class [declaration]
+  NS_IMETHOD ConvertNoBuff(const char16_t * aSrc, 
+                            int32_t * aSrcLength, 
+                            char * aDest, 
+                            int32_t * aDestLength);
+
+  NS_IMETHOD ConvertNoBuffNoErr(const char16_t * aSrc, int32_t * aSrcLength, 
+                                char * aDest, int32_t * aDestLength)
+  {
+    return NS_OK;
+  }  // just make it not abstract;
+
+  virtual void CreateExtensionEncoder();
+  virtual void Create4BytesEncoder();
+
+  nsCOMPtr<nsIUnicodeEncoder> mExtensionEncoder;
+  nsCOMPtr<nsIUnicodeEncoder> m4BytesEncoder;
+protected:
+  char16_t mSurrogateHigh;
+  nsGBKConvUtil mUtil;
+  bool TryExtensionEncoder(char16_t aChar, char* aDest, int32_t* aOutLen);
+  bool Try4BytesEncoder(char16_t aChar, char* aDest, int32_t* aOutLen);
+  virtual bool EncodeSurrogate(char16_t aSurrogateHigh, char16_t aSurrogateLow, char* aDest);
+};
+
+class nsUnicodeToGB18030: public nsUnicodeToGBK
+{
+public:
+  nsUnicodeToGB18030() : nsUnicodeToGBK(4) {}
+  virtual ~nsUnicodeToGB18030() {}
+protected:
+  virtual void CreateExtensionEncoder();
+  virtual void Create4BytesEncoder();
+  virtual bool EncodeSurrogate(char16_t aSurrogateHigh, char16_t aSurrogateLow, char* aDest);
+};
+
+#endif /* nsUnicodeToGBK_h___ */
+