Get rid of NULLs in xfa/fxbarcode/

xfa/fxbarcode/datamatrix/BC_DataMatrixBitMatrixParser.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 // Original code is licensed as follows:
 /*
  * Copyright 2007 ZXing authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ skipping 11 matching lines @@
 
 #include "xfa/fxbarcode/datamatrix/BC_DataMatrixBitMatrixParser.h"
 
 #include <memory>
 
 #include "xfa/fxbarcode/common/BC_CommonBitMatrix.h"
 #include "xfa/fxbarcode/datamatrix/BC_DataMatrixVersion.h"
 #include "xfa/fxbarcode/utils.h"
 
 CBC_DataMatrixBitMatrixParser::CBC_DataMatrixBitMatrixParser() {
-  m_mappingBitMatrix = NULL;
-  m_version = NULL;
-  m_readMappingMatrix = NULL;
+  m_mappingBitMatrix = nullptr;
+  m_version = nullptr;
+  m_readMappingMatrix = nullptr;
 }
 void CBC_DataMatrixBitMatrixParser::Init(CBC_CommonBitMatrix* bitMatrix,
                                          int32_t& e) {
   int32_t dimension = bitMatrix->GetHeight();
   if (dimension < 8 || dimension > 144 || (dimension & 0x01) != 0) {
     e = BCExceptionFormatException;
     return;
   }
   m_version = ReadVersion(bitMatrix, e);
   BC_EXCEPTION_CHECK_ReturnVoid(e);
@@ skipping 10 matching lines @@
 CBC_DataMatrixVersion* CBC_DataMatrixBitMatrixParser::GetVersion() {
   return m_version;
 }
 CBC_DataMatrixVersion* CBC_DataMatrixBitMatrixParser::ReadVersion(
     CBC_CommonBitMatrix* bitMatrix,
     int32_t& e) {
   int32_t rows = bitMatrix->GetHeight();
   int32_t columns = bitMatrix->GetWidth();
   CBC_DataMatrixVersion* temp =
       CBC_DataMatrixVersion::GetVersionForDimensions(rows, columns, e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   return temp;
 }
 CFX_ByteArray* CBC_DataMatrixBitMatrixParser::ReadCodewords(int32_t& e) {
   std::unique_ptr<CFX_ByteArray> result(new CFX_ByteArray());
   result->SetSize(m_version->GetTotalCodewords());
   int32_t resultOffset = 0;
   int32_t row = 4;
   int32_t column = 0;
   int32_t numRows = m_mappingBitMatrix->GetHeight();
   int32_t numColumns = m_mappingBitMatrix->GetWidth();
@@ skipping 49 matching lines @@
         }
         row += 2;
         column -= 2;
       } while ((row < numRows) && (column >= 0));
       row += 3;
       column += 1;
     }
   } while ((row < numRows) || (column < numColumns));
   if (resultOffset != m_version->GetTotalCodewords()) {
     e = BCExceptionFormatException;
-    return NULL;
+    return nullptr;
   }
   return result.release();
 }
 FX_BOOL CBC_DataMatrixBitMatrixParser::ReadModule(int32_t row,
                                                   int32_t column,
                                                   int32_t numRows,
                                                   int32_t numColumns) {
   if (row < 0) {
     row += numRows;
     column += 4 - ((numRows + 4) & 0x07);
@@ skipping 187 matching lines @@
   }
   return currentByte;
 }
 CBC_CommonBitMatrix* CBC_DataMatrixBitMatrixParser::ExtractDataRegion(
     CBC_CommonBitMatrix* bitMatrix,
     int32_t& e) {
   int32_t symbolSizeRows = m_version->GetSymbolSizeRows();
   int32_t symbolSizeColumns = m_version->GetSymbolSizeColumns();
   if (bitMatrix->GetHeight() != symbolSizeRows) {
     e = BCExceptionCanNotCallGetDimensionOnNonSquareMatrix;
-    return NULL;
+    return nullptr;
   }
   int32_t dataRegionSizeRows = m_version->GetDataRegionSizeRows();
   int32_t dataRegionSizeColumns = m_version->GetDataRegionSizeColumns();
   int32_t numDataRegionsRow = symbolSizeRows / dataRegionSizeRows;
   int32_t numDataRegionsColumn = symbolSizeColumns / dataRegionSizeColumns;
   int32_t sizeDataRegionRow = numDataRegionsRow * dataRegionSizeRows;
   int32_t sizeDataRegionColumn = numDataRegionsColumn * dataRegionSizeColumns;
   CBC_CommonBitMatrix* bitMatrixWithoutAlignment = new CBC_CommonBitMatrix();
   bitMatrixWithoutAlignment->Init(sizeDataRegionColumn, sizeDataRegionRow);
   int32_t dataRegionRow;
@@ skipping 15 matching lines @@
           if (bitMatrix->Get(readColumnOffset, readRowOffset)) {
             int32_t writeColumnOffset = dataRegionColumnOffset + j;
             bitMatrixWithoutAlignment->Set(writeColumnOffset, writeRowOffset);
           }
         }
       }
     }
   }
   return bitMatrixWithoutAlignment;
 }