diff -r 000000000000 -r 6474c204b198 intl/uconv/ucvcn/nsISO2022CNToUnicode.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/intl/uconv/ucvcn/nsISO2022CNToUnicode.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,107 @@
+/* -*- 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/. */
+#ifndef nsISO2022CNToUnicode_h__
+#define nsISO2022CNToUnicode_h__
+#include "nsCOMPtr.h"
+#include "nsUCSupport.h"
+#include "mozilla/Telemetry.h"
+
+#define MBYTE       0x8e
+#undef PMASK
+#define PMASK       0xa0
+
+#define SI          0x0f 
+#define SO          0x0e
+#define ESC         0x1b
+#define SS2         0x4e
+#define SS3         0x4f
+
+class nsISO2022CNToUnicode : public nsBasicDecoderSupport
+{
+public:
+  nsISO2022CNToUnicode() : 
+        mState(eState_ASCII), 
+        mPlaneID(0),
+        mRunLength(0)
+  {
+    mozilla::Telemetry::Accumulate(
+      mozilla::Telemetry::DECODER_INSTANTIATED_ISO2022CN, true);
+  }
+
+  virtual ~nsISO2022CNToUnicode() {}
+
+  NS_IMETHOD Convert(const char *aSrc, int32_t * aSrcLength,
+     char16_t * aDest, int32_t * aDestLength) ;
+
+  NS_IMETHOD GetMaxLength(const char * aSrc, int32_t aSrcLength,
+     int32_t * aDestLength)
+  {
+    *aDestLength = aSrcLength;
+    return NS_OK;
+  }
+
+  NS_IMETHOD Reset()
+  {
+    mState = eState_ASCII;
+    mPlaneID = 0;
+    mRunLength = 0;
+
+    return NS_OK;
+  }
+
+private:
+  // State Machine ID
+  enum {
+    eState_ASCII,
+    eState_ESC,                           // ESC
+    eState_ESC_24,                        // ESC $
+
+    eState_ESC_24_29,                     // ESC $ )
+    eState_ESC_24_29_A,                   // ESC $ ) A
+    eState_GB2312_1980,                   // ESC $ ) A SO
+    eState_GB2312_1980_2ndbyte,           // ESC $ ) A SO
+    eState_ESC_24_29_A_SO_SI,             // ESC $ ) A SO SI
+    eState_ESC_24_29_G,                   // ESC $ ) G or H
+    eState_CNS11643_1,                    // ESC $ ) G SO
+    eState_CNS11643_1_2ndbyte,            // ESC $ ) G SO
+    eState_ESC_24_29_G_SO_SI,             // ESC $ ) G SO SI
+
+    eState_ESC_24_2A,                     // ESC $ *
+    eState_ESC_24_2A_H,                   // ESC $ * H
+    eState_ESC_24_2A_H_ESC,               // ESC $ * H ESC
+    eState_CNS11643_2,                    // ESC $ * H ESC SS2
+    eState_CNS11643_2_2ndbyte,            // ESC $ * H ESC SS2
+    eState_ESC_24_2A_H_ESC_SS2_SI,        // ESC $ * H ESC SS2 SI
+    eState_ESC_24_2A_H_ESC_SS2_SI_ESC,    // ESC $ * H ESC SS2 SI ESC
+
+    eState_ESC_24_2B,                     // ESC $ +
+    eState_ESC_24_2B_I,                   // ESC $ + I
+    eState_ESC_24_2B_I_ESC,               // ESC $ + I ESC
+    eState_CNS11643_3,                    // ESC $ + I ESC SS3
+    eState_CNS11643_3_2ndbyte,            // ESC $ + I ESC SS3
+    eState_ESC_24_2B_I_ESC_SS3_SI,        // ESC $ + I ESC SI
+    eState_ESC_24_2B_I_ESC_SS3_SI_ESC,    // ESC $ + I ESC SI ESC
+    eState_ERROR
+  } mState;
+
+  char mData;
+
+  // Plane number for CNS11643 code
+  int mPlaneID;
+
+  // Length of non-ASCII run
+  uint32_t mRunLength;
+
+  // Decoder handler
+  nsCOMPtr<nsIUnicodeDecoder> mGB2312_Decoder;
+  nsCOMPtr<nsIUnicodeDecoder> mEUCTW_Decoder;
+
+  NS_IMETHOD GB2312_To_Unicode(unsigned char *aSrc, int32_t aSrcLength,
+     char16_t * aDest, int32_t * aDestLength) ;
+
+  NS_IMETHOD EUCTW_To_Unicode(unsigned char *aSrc, int32_t aSrcLength,
+     char16_t * aDest, int32_t * aDestLength) ;
+};
+#endif // nsISO2022CNToUnicode_h__