Make code compile with clang_use_chrome_plugin (part III)

This change contains files in xfa/fxbarcode directory.
This is part of the efforts to make PDFium code compilable
by Clang chromium style plugins.

The changes are mainly the following:
-- move inline constructor/destructor of complex class/struct out-of-line;
-- add constructor/destructor of complex class/struct if not
 explicitly defined;
-- add explicit out-of-line copy constructor when needed;
-- move inline virtual functions out-of-line;
-- Properly mark virtual functions with 'override';
-- some minor cleanups;

BUG=pdfium:469

Review-Url: https://codereview.chromium.org/2067903002

23 files changed, 108 insertions, 56 deletions

diff --git a/xfa/fxbarcode/datamatrix/BC_ASCIIEncoder.h b/xfa/fxbarcode/datamatrix/BC_ASCIIEncoder.h
index 11be5e046a..40559b532d 100644
--- a/xfa/fxbarcode/datamatrix/BC_ASCIIEncoder.h
+++ b/xfa/fxbarcode/datamatrix/BC_ASCIIEncoder.h
@@ -14,9 +14,11 @@ class CBC_EncoderContext;
 class CBC_ASCIIEncoder : public CBC_Encoder {
  public:
   CBC_ASCIIEncoder();
-  virtual ~CBC_ASCIIEncoder();
-  int32_t getEncodingMode();
-  void Encode(CBC_EncoderContext& context, int32_t& e);
+  ~CBC_ASCIIEncoder() override;
+
+  // CBC_Encoder
+  int32_t getEncodingMode() override;
+  void Encode(CBC_EncoderContext& context, int32_t& e) override;
 
  private:
   static FX_WCHAR encodeASCIIDigits(FX_WCHAR digit1,
diff --git a/xfa/fxbarcode/datamatrix/BC_Base256Encoder.h b/xfa/fxbarcode/datamatrix/BC_Base256Encoder.h
index 64dbdc7ba4..c41c79db08 100644
--- a/xfa/fxbarcode/datamatrix/BC_Base256Encoder.h
+++ b/xfa/fxbarcode/datamatrix/BC_Base256Encoder.h
@@ -12,9 +12,11 @@
 class CBC_Base256Encoder : public CBC_Encoder {
  public:
   CBC_Base256Encoder();
-  virtual ~CBC_Base256Encoder();
-  int32_t getEncodingMode();
-  void Encode(CBC_EncoderContext& context, int32_t& e);
+  ~CBC_Base256Encoder() override;
+
+  // CBC_Encoder
+  int32_t getEncodingMode() override;
+  void Encode(CBC_EncoderContext& context, int32_t& e) override;
 
  private:
   static FX_WCHAR randomize255State(FX_WCHAR ch, int32_t codewordPosition);
diff --git a/xfa/fxbarcode/datamatrix/BC_C40Encoder.h b/xfa/fxbarcode/datamatrix/BC_C40Encoder.h
index 9dcb1e5c5f..9737981f75 100644
--- a/xfa/fxbarcode/datamatrix/BC_C40Encoder.h
+++ b/xfa/fxbarcode/datamatrix/BC_C40Encoder.h
@@ -12,11 +12,15 @@
 class CBC_C40Encoder : public CBC_Encoder {
  public:
   CBC_C40Encoder();
-  virtual ~CBC_C40Encoder();
-  virtual int32_t getEncodingMode();
-  virtual void Encode(CBC_EncoderContext& context, int32_t& e);
+  ~CBC_C40Encoder() override;
+
+  // CBC_Encoder
+  int32_t getEncodingMode() override;
+  void Encode(CBC_EncoderContext& context, int32_t& e) override;
+
   static void writeNextTriplet(CBC_EncoderContext& context,
                                CFX_WideString& buffer);
+
   virtual void handleEOD(CBC_EncoderContext& context,
                          CFX_WideString& buffer,
                          int32_t& e);
diff --git a/xfa/fxbarcode/datamatrix/BC_DataMatrixBitMatrixParser.h b/xfa/fxbarcode/datamatrix/BC_DataMatrixBitMatrixParser.h
index c8fc3346f1..63540041e3 100644
--- a/xfa/fxbarcode/datamatrix/BC_DataMatrixBitMatrixParser.h
+++ b/xfa/fxbarcode/datamatrix/BC_DataMatrixBitMatrixParser.h
@@ -16,6 +16,7 @@ class CBC_DataMatrixBitMatrixParser {
  public:
   CBC_DataMatrixBitMatrixParser();
   virtual ~CBC_DataMatrixBitMatrixParser();
+
   CBC_DataMatrixVersion* GetVersion();
   CFX_ByteArray* ReadCodewords(int32_t& e);
   FX_BOOL ReadModule(int32_t row,
diff --git a/xfa/fxbarcode/datamatrix/BC_DataMatrixDecodedBitStreamParser.h b/xfa/fxbarcode/datamatrix/BC_DataMatrixDecodedBitStreamParser.h
index 415e27b166..4ff6776826 100644
--- a/xfa/fxbarcode/datamatrix/BC_DataMatrixDecodedBitStreamParser.h
+++ b/xfa/fxbarcode/datamatrix/BC_DataMatrixDecodedBitStreamParser.h
@@ -6,12 +6,15 @@
 
 #ifndef XFA_FXBARCODE_DATAMATRIX_BC_DATAMATRIXDECODEDBITSTREAMPARSER_H_
 #define XFA_FXBARCODE_DATAMATRIX_BC_DATAMATRIXDECODEDBITSTREAMPARSER_H_
+
 class CBC_CommonDecoderResult;
 class CBC_CommonBitSource;
+
 class CBC_DataMatrixDecodedBitStreamParser {
  public:
   CBC_DataMatrixDecodedBitStreamParser();
   virtual ~CBC_DataMatrixDecodedBitStreamParser();
+
   static CBC_CommonDecoderResult* Decode(CFX_ByteArray& bytes, int32_t& e);
 
  private:
diff --git a/xfa/fxbarcode/datamatrix/BC_DataMatrixDecoder.h b/xfa/fxbarcode/datamatrix/BC_DataMatrixDecoder.h
index c7af613f6d..38d3fe5bf7 100644
--- a/xfa/fxbarcode/datamatrix/BC_DataMatrixDecoder.h
+++ b/xfa/fxbarcode/datamatrix/BC_DataMatrixDecoder.h
@@ -17,7 +17,9 @@ class CBC_DataMatrixDecoder {
  public:
   CBC_DataMatrixDecoder();
   virtual ~CBC_DataMatrixDecoder();
+
   CBC_CommonDecoderResult* Decode(CBC_CommonBitMatrix* bits, int32_t& e);
+
   virtual void Init();
 
  private:
diff --git a/xfa/fxbarcode/datamatrix/BC_DataMatrixDetector.cpp b/xfa/fxbarcode/datamatrix/BC_DataMatrixDetector.cpp
index a4ca4e228c..d34515310e 100644
--- a/xfa/fxbarcode/datamatrix/BC_DataMatrixDetector.cpp
+++ b/xfa/fxbarcode/datamatrix/BC_DataMatrixDetector.cpp
@@ -405,3 +405,11 @@ void CBC_DataMatrixDetector::OrderBestPatterns(
   (*patterns)[1] = topLeft;
   (*patterns)[2] = topRight;
 }
+
+CBC_ResultPointsAndTransitions::CBC_ResultPointsAndTransitions(
+    CBC_ResultPoint* from,
+    CBC_ResultPoint* to,
+    int32_t transitions)
+    : m_from(from), m_to(to), m_transitions(transitions) {}
+
+CBC_ResultPointsAndTransitions::~CBC_ResultPointsAndTransitions() {}
diff --git a/xfa/fxbarcode/datamatrix/BC_DataMatrixDetector.h b/xfa/fxbarcode/datamatrix/BC_DataMatrixDetector.h
index 8ef053b334..d06b051554 100644
--- a/xfa/fxbarcode/datamatrix/BC_DataMatrixDetector.h
+++ b/xfa/fxbarcode/datamatrix/BC_DataMatrixDetector.h
@@ -19,12 +19,9 @@ class CBC_ResultPointsAndTransitions {
  public:
   CBC_ResultPointsAndTransitions(CBC_ResultPoint* from,
                                  CBC_ResultPoint* to,
-                                 int32_t transitions) {
-    m_from = from;
-    m_to = to;
-    m_transitions = transitions;
-  }
-  ~CBC_ResultPointsAndTransitions() {}
+                                 int32_t transitions);
+  ~CBC_ResultPointsAndTransitions();
+
   CBC_ResultPoint* GetFrom() const { return m_from; }
   CBC_ResultPoint* GetTo() const { return m_to; }
   int32_t GetTransitions() const { return m_transitions; }
@@ -39,6 +36,7 @@ class CBC_DataMatrixDetector {
  public:
   CBC_DataMatrixDetector(CBC_CommonBitMatrix* image);
   virtual ~CBC_DataMatrixDetector();
+
   CBC_QRDetectorResult* Detect(int32_t& e);
   CBC_ResultPoint* CorrectTopRightRectangular(CBC_ResultPoint* bottomLeft,
                                               CBC_ResultPoint* bottomRight,
@@ -67,6 +65,7 @@ class CBC_DataMatrixDetector {
                  CBC_ResultPoint* key);
   int32_t Round(FX_FLOAT d);
   void OrderBestPatterns(CFX_ArrayTemplate<CBC_ResultPoint*>* patterns);
+
   virtual void Init(int32_t& e);
 
  private:
diff --git a/xfa/fxbarcode/datamatrix/BC_DataMatrixReader.cpp b/xfa/fxbarcode/datamatrix/BC_DataMatrixReader.cpp
index 31d95b0cb7..7c1ba96a46 100644
--- a/xfa/fxbarcode/datamatrix/BC_DataMatrixReader.cpp
+++ b/xfa/fxbarcode/datamatrix/BC_DataMatrixReader.cpp
@@ -57,6 +57,7 @@ CFX_ByteString CBC_DataMatrixReader::Decode(CBC_BinaryBitmap* image,
   BC_EXCEPTION_CHECK_ReturnValue(e, "");
   return decodeResult->GetText();
 }
+
 CFX_ByteString CBC_DataMatrixReader::Decode(CBC_BinaryBitmap* image,
                                             int32_t& e) {
   CFX_ByteString bs = Decode(image, 0, e);
diff --git a/xfa/fxbarcode/datamatrix/BC_DataMatrixReader.h b/xfa/fxbarcode/datamatrix/BC_DataMatrixReader.h
index 21fc54eeb5..c7a0995dcb 100644
--- a/xfa/fxbarcode/datamatrix/BC_DataMatrixReader.h
+++ b/xfa/fxbarcode/datamatrix/BC_DataMatrixReader.h
@@ -15,9 +15,13 @@ class CBC_DataMatrixDecoder;
 class CBC_DataMatrixReader : public CBC_Reader {
  public:
   CBC_DataMatrixReader();
-  virtual ~CBC_DataMatrixReader();
-  CFX_ByteString Decode(CBC_BinaryBitmap* image, int32_t& e);
-  CFX_ByteString Decode(CBC_BinaryBitmap* image, int hints, int32_t& e);
+  ~CBC_DataMatrixReader() override;
+
+  // CBC_Reader
+  CFX_ByteString Decode(CBC_BinaryBitmap* image, int32_t& e) override;
+  CFX_ByteString Decode(CBC_BinaryBitmap* image,
+                        int hints,
+                        int32_t& e) override;
 
   virtual void Init();
 
diff --git a/xfa/fxbarcode/datamatrix/BC_DataMatrixSymbolInfo144.h b/xfa/fxbarcode/datamatrix/BC_DataMatrixSymbolInfo144.h
index 4d6cdc1291..2cd0cd0e6f 100644
--- a/xfa/fxbarcode/datamatrix/BC_DataMatrixSymbolInfo144.h
+++ b/xfa/fxbarcode/datamatrix/BC_DataMatrixSymbolInfo144.h
@@ -12,9 +12,9 @@
 class CBC_DataMatrixSymbolInfo144 : public CBC_SymbolInfo {
  public:
   CBC_DataMatrixSymbolInfo144();
-  virtual ~CBC_DataMatrixSymbolInfo144();
+  ~CBC_DataMatrixSymbolInfo144() override;
+
   int32_t getInterleavedBlockCount();
-  int32_t getDataLengthForInterleavedBlock(int32_t index);
 };
 
 #endif  // XFA_FXBARCODE_DATAMATRIX_BC_DATAMATRIXSYMBOLINFO144_H_
diff --git a/xfa/fxbarcode/datamatrix/BC_DataMatrixVersion.cpp b/xfa/fxbarcode/datamatrix/BC_DataMatrixVersion.cpp
index d1dcc23e7b..29fb792ced 100644
--- a/xfa/fxbarcode/datamatrix/BC_DataMatrixVersion.cpp
+++ b/xfa/fxbarcode/datamatrix/BC_DataMatrixVersion.cpp
@@ -170,3 +170,22 @@ CBC_DataMatrixVersion* CBC_DataMatrixVersion::GetVersionForDimensions(
   e = BCExceptionNotFound;
   return nullptr;
 }
+
+ECB::ECB(int32_t count, int32_t dataCodewords)
+    : m_count(count), m_dataCodewords(dataCodewords) {}
+
+ECBlocks::ECBlocks(int32_t ecCodewords, ECB* ecBlocks)
+    : m_ecCodewords(ecCodewords) {
+  m_ecBlocksArray.Add(ecBlocks);
+}
+
+ECBlocks::ECBlocks(int32_t ecCodewords, ECB* ecBlocks1, ECB* ecBlocks2)
+    : m_ecCodewords(ecCodewords) {
+  m_ecBlocksArray.Add(ecBlocks1);
+  m_ecBlocksArray.Add(ecBlocks2);
+}
+
+ECBlocks::~ECBlocks() {
+  for (int32_t i = 0; i < m_ecBlocksArray.GetSize(); i++)
+    delete m_ecBlocksArray[i];
+}
diff --git a/xfa/fxbarcode/datamatrix/BC_DataMatrixVersion.h b/xfa/fxbarcode/datamatrix/BC_DataMatrixVersion.h
index b4585d20bc..9bbf7f7b72 100644
--- a/xfa/fxbarcode/datamatrix/BC_DataMatrixVersion.h
+++ b/xfa/fxbarcode/datamatrix/BC_DataMatrixVersion.h
@@ -13,8 +13,7 @@ class CBC_DataMatrixVersion;
 
 class ECB {
  public:
-  ECB(int32_t count, int32_t dataCodewords)
-      : m_count(count), m_dataCodewords(dataCodewords) {}
+  ECB(int32_t count, int32_t dataCodewords);
 
   int32_t GetCount() const { return m_count; }
   int32_t GetDataCodewords() const { return m_dataCodewords; }
@@ -26,20 +25,9 @@ class ECB {
 
 class ECBlocks {
  public:
-  ECBlocks(int32_t ecCodewords, ECB* ecBlocks) : m_ecCodewords(ecCodewords) {
-    m_ecBlocksArray.Add(ecBlocks);
-  }
-
-  ECBlocks(int32_t ecCodewords, ECB* ecBlocks1, ECB* ecBlocks2)
-      : m_ecCodewords(ecCodewords) {
-    m_ecBlocksArray.Add(ecBlocks1);
-    m_ecBlocksArray.Add(ecBlocks2);
-  }
-
-  ~ECBlocks() {
-    for (int32_t i = 0; i < m_ecBlocksArray.GetSize(); i++)
-      delete m_ecBlocksArray[i];
-  }
+  ECBlocks(int32_t ecCodewords, ECB* ecBlocks);
+  ECBlocks(int32_t ecCodewords, ECB* ecBlocks1, ECB* ecBlocks2);
+  ~ECBlocks();
 
   int32_t GetECCodewords() { return m_ecCodewords; }
   const CFX_ArrayTemplate<ECB*>& GetECBlocks() { return m_ecBlocksArray; }
@@ -58,6 +46,7 @@ class CBC_DataMatrixVersion {
                         int32_t dataRegionSizeColumns,
                         ECBlocks* ecBlocks);
   virtual ~CBC_DataMatrixVersion();
+
   static void Initialize();
   static void Finalize();
   int32_t GetVersionNumber();
diff --git a/xfa/fxbarcode/datamatrix/BC_DataMatrixWriter.h b/xfa/fxbarcode/datamatrix/BC_DataMatrixWriter.h
index 7c19a07c19..1196e46352 100644
--- a/xfa/fxbarcode/datamatrix/BC_DataMatrixWriter.h
+++ b/xfa/fxbarcode/datamatrix/BC_DataMatrixWriter.h
@@ -16,12 +16,15 @@ class CBC_SymbolInfo;
 class CBC_DataMatrixWriter : public CBC_TwoDimWriter {
  public:
   CBC_DataMatrixWriter();
-  virtual ~CBC_DataMatrixWriter();
-  uint8_t* Encode(const CFX_WideString& contents,
-                  int32_t& outWidth,
-                  int32_t& outHeight,
-                  int32_t& e);
-  FX_BOOL SetErrorCorrectionLevel(int32_t level);
+  ~CBC_DataMatrixWriter() override;
+
+  virtual uint8_t* Encode(const CFX_WideString& contents,
+                          int32_t& outWidth,
+                          int32_t& outHeight,
+                          int32_t& e);
+
+  // CBC_TwoDimWriter
+  FX_BOOL SetErrorCorrectionLevel(int32_t level) override;
 
  private:
   static CBC_CommonByteMatrix* encodeLowLevel(CBC_DefaultPlacement* placement,
diff --git a/xfa/fxbarcode/datamatrix/BC_EdifactEncoder.h b/xfa/fxbarcode/datamatrix/BC_EdifactEncoder.h
index fd37ffb5b4..3eb762fe6d 100644
--- a/xfa/fxbarcode/datamatrix/BC_EdifactEncoder.h
+++ b/xfa/fxbarcode/datamatrix/BC_EdifactEncoder.h
@@ -12,9 +12,11 @@
 class CBC_EdifactEncoder : public CBC_Encoder {
  public:
   CBC_EdifactEncoder();
-  virtual ~CBC_EdifactEncoder();
-  int32_t getEncodingMode();
-  void Encode(CBC_EncoderContext& context, int32_t& e);
+  ~CBC_EdifactEncoder() override;
+
+  // CBC_Encoder
+  int32_t getEncodingMode() override;
+  void Encode(CBC_EncoderContext& context, int32_t& e) override;
 
  private:
   static void handleEOD(CBC_EncoderContext& context,
diff --git a/xfa/fxbarcode/datamatrix/BC_Encoder.h b/xfa/fxbarcode/datamatrix/BC_Encoder.h
index 78dc6ac447..68a223fee1 100644
--- a/xfa/fxbarcode/datamatrix/BC_Encoder.h
+++ b/xfa/fxbarcode/datamatrix/BC_Encoder.h
@@ -10,10 +10,12 @@
 #include "xfa/fxbarcode/utils.h"
 
 class CBC_EncoderContext;
+
 class CBC_Encoder {
  public:
   CBC_Encoder();
   virtual ~CBC_Encoder();
+
   virtual int32_t getEncodingMode() = 0;
   virtual void Encode(CBC_EncoderContext& context, int32_t& e) = 0;
 };
diff --git a/xfa/fxbarcode/datamatrix/BC_EncoderContext.h b/xfa/fxbarcode/datamatrix/BC_EncoderContext.h
index ddc6988dc3..0c1c8a6547 100644
--- a/xfa/fxbarcode/datamatrix/BC_EncoderContext.h
+++ b/xfa/fxbarcode/datamatrix/BC_EncoderContext.h
@@ -17,7 +17,8 @@ class CBC_EncoderContext : public CBC_SymbolShapeHint {
   CBC_EncoderContext(const CFX_WideString msg,
                      CFX_WideString ecLevel,
                      int32_t& e);
-  virtual ~CBC_EncoderContext();
+  ~CBC_EncoderContext() override;
+
   void setSymbolShape(SymbolShapeHint shape);
   void setSizeConstraints(CBC_Dimension* minSize, CBC_Dimension* maxSize);
   CFX_WideString getMessage();
diff --git a/xfa/fxbarcode/datamatrix/BC_ErrorCorrection.h b/xfa/fxbarcode/datamatrix/BC_ErrorCorrection.h
index 1ed8c34a23..d3b9da8056 100644
--- a/xfa/fxbarcode/datamatrix/BC_ErrorCorrection.h
+++ b/xfa/fxbarcode/datamatrix/BC_ErrorCorrection.h
@@ -8,10 +8,12 @@
 #define XFA_FXBARCODE_DATAMATRIX_BC_ERRORCORRECTION_H_
 
 class CBC_SymbolInfo;
+
 class CBC_ErrorCorrection {
  public:
   CBC_ErrorCorrection();
   virtual ~CBC_ErrorCorrection();
+
   static void Initialize();
   static void Finalize();
   static CFX_WideString encodeECC200(CFX_WideString codewords,
diff --git a/xfa/fxbarcode/datamatrix/BC_HighLevelEncoder.h b/xfa/fxbarcode/datamatrix/BC_HighLevelEncoder.h
index 0aad4d4da5..550b601e53 100644
--- a/xfa/fxbarcode/datamatrix/BC_HighLevelEncoder.h
+++ b/xfa/fxbarcode/datamatrix/BC_HighLevelEncoder.h
@@ -19,7 +19,8 @@
 class CBC_HighLevelEncoder : public CBC_SymbolShapeHint {
  public:
   CBC_HighLevelEncoder();
-  virtual ~CBC_HighLevelEncoder();
+  ~CBC_HighLevelEncoder() override;
+
   CFX_ByteArray& getBytesForMessage(CFX_WideString msg);
   static CFX_WideString encodeHighLevel(CFX_WideString msg,
                                         CFX_WideString ecLevel,
diff --git a/xfa/fxbarcode/datamatrix/BC_SymbolInfo.h b/xfa/fxbarcode/datamatrix/BC_SymbolInfo.h
index 64270dd9ac..96196da21c 100644
--- a/xfa/fxbarcode/datamatrix/BC_SymbolInfo.h
+++ b/xfa/fxbarcode/datamatrix/BC_SymbolInfo.h
@@ -21,7 +21,8 @@ class CBC_SymbolInfo : public CBC_SymbolShapeHint {
                  int32_t matrixWidth,
                  int32_t matrixHeight,
                  int32_t dataRegions);
-  virtual ~CBC_SymbolInfo();
+  ~CBC_SymbolInfo() override;
+
   static void Initialize();
   static void Finalize();
   static void overrideSymbolSet(CBC_SymbolInfo* override);
diff --git a/xfa/fxbarcode/datamatrix/BC_SymbolShapeHint.h b/xfa/fxbarcode/datamatrix/BC_SymbolShapeHint.h
index 5dfac0516f..7cd4c86931 100644
--- a/xfa/fxbarcode/datamatrix/BC_SymbolShapeHint.h
+++ b/xfa/fxbarcode/datamatrix/BC_SymbolShapeHint.h
@@ -11,6 +11,7 @@ class CBC_SymbolShapeHint {
  public:
   CBC_SymbolShapeHint();
   virtual ~CBC_SymbolShapeHint();
+
   enum SymbolShapeHint {
     FORCE_NONE,
     FORCE_SQUARE,
diff --git a/xfa/fxbarcode/datamatrix/BC_TextEncoder.h b/xfa/fxbarcode/datamatrix/BC_TextEncoder.h
index 1f97f3f8c6..e6013b9508 100644
--- a/xfa/fxbarcode/datamatrix/BC_TextEncoder.h
+++ b/xfa/fxbarcode/datamatrix/BC_TextEncoder.h
@@ -8,12 +8,15 @@
 #define XFA_FXBARCODE_DATAMATRIX_BC_TEXTENCODER_H_
 
 class CBC_TextEncoder;
+
 class CBC_TextEncoder : public CBC_C40Encoder {
  public:
   CBC_TextEncoder();
-  virtual ~CBC_TextEncoder();
-  int32_t getEncodingMode();
-  int32_t encodeChar(FX_WCHAR c, CFX_WideString& sb, int32_t& e);
+  ~CBC_TextEncoder() override;
+
+  // CBC_C40Encoder
+  int32_t getEncodingMode() override;
+  int32_t encodeChar(FX_WCHAR c, CFX_WideString& sb, int32_t& e) override;
 };
 
 #endif  // XFA_FXBARCODE_DATAMATRIX_BC_TEXTENCODER_H_
diff --git a/xfa/fxbarcode/datamatrix/BC_X12Encoder.h b/xfa/fxbarcode/datamatrix/BC_X12Encoder.h
index 5dccbb1d6f..52239ce529 100644
--- a/xfa/fxbarcode/datamatrix/BC_X12Encoder.h
+++ b/xfa/fxbarcode/datamatrix/BC_X12Encoder.h
@@ -12,13 +12,15 @@ class CBC_X12Encoder;
 class CBC_X12Encoder : public CBC_C40Encoder {
  public:
   CBC_X12Encoder();
-  virtual ~CBC_X12Encoder();
-  int32_t getEncodingMode();
-  void Encode(CBC_EncoderContext& context, int32_t& e);
+  ~CBC_X12Encoder() override;
+
+  // CBC_C40Encoder
+  int32_t getEncodingMode() override;
+  void Encode(CBC_EncoderContext& context, int32_t& e) override;
   void handleEOD(CBC_EncoderContext& context,
                  CFX_WideString& buffer,
-                 int32_t& e);
-  int32_t encodeChar(FX_WCHAR c, CFX_WideString& sb, int32_t& e);
+                 int32_t& e) override;
+  int32_t encodeChar(FX_WCHAR c, CFX_WideString& sb, int32_t& e) override;
 };
 
 #endif  // XFA_FXBARCODE_DATAMATRIX_BC_X12ENCODER_H_