Get rid of NULLs in xfa/fxbarcode/

xfa/fxbarcode/qrcode/BC_QRCoderDecoder.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 2008 ZXing authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ skipping 17 matching lines @@
 #include "xfa/fxbarcode/common/BC_CommonDecoderResult.h"
 #include "xfa/fxbarcode/common/reedsolomon/BC_ReedSolomonDecoder.h"
 #include "xfa/fxbarcode/common/reedsolomon/BC_ReedSolomonGF256.h"
 #include "xfa/fxbarcode/qrcode/BC_QRBitMatrixParser.h"
 #include "xfa/fxbarcode/qrcode/BC_QRCoderFormatInformation.h"
 #include "xfa/fxbarcode/qrcode/BC_QRCoderVersion.h"
 #include "xfa/fxbarcode/qrcode/BC_QRDataBlock.h"
 #include "xfa/fxbarcode/qrcode/BC_QRDecodedBitStreamParser.h"
 
 CBC_QRCoderDecoder::CBC_QRCoderDecoder() {
-  m_rsDecoder = NULL;
+  m_rsDecoder = nullptr;
 }
 
 void CBC_QRCoderDecoder::Init() {
   m_rsDecoder = new CBC_ReedSolomonDecoder(CBC_ReedSolomonGF256::QRCodeFild);
 }
 CBC_QRCoderDecoder::~CBC_QRCoderDecoder() {
   delete m_rsDecoder;
 }
 CBC_CommonDecoderResult* CBC_QRCoderDecoder::Decode(FX_BOOL* image,
                                                     int32_t width,
                                                     int32_t height,
                                                     int32_t& e) {
   CBC_CommonBitMatrix bits;
   bits.Init(width);
   for (int32_t i = 0; i < width; i++) {
     for (int32_t j = 0; j < height; j++) {
       if (image[i * width + j]) {
         bits.Set(j, i);
       }
     }
   }
   CBC_CommonDecoderResult* cdr = Decode(&bits, height, e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   return cdr;
 }
 CBC_CommonDecoderResult* CBC_QRCoderDecoder::Decode(CBC_CommonBitMatrix* bits,
                                                     int32_t byteModeDecode,
                                                     int32_t& e) {
   CBC_QRBitMatrixParser parser;
   parser.Init(bits, e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   CBC_QRCoderVersion* version = parser.ReadVersion(e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   CBC_QRCoderFormatInformation* temp = parser.ReadFormatInformation(e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   CBC_QRCoderErrorCorrectionLevel* ecLevel = temp->GetErrorCorrectionLevel();
   std::unique_ptr<CFX_ByteArray> codewords(parser.ReadCodewords(e));
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   CFX_ArrayTemplate<CBC_QRDataBlock*>* dataBlocks =
       CBC_QRDataBlock::GetDataBlocks(codewords.get(), version, ecLevel, e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   int32_t totalBytes = 0;
   for (int32_t i = 0; i < dataBlocks->GetSize(); i++) {
     totalBytes += (*dataBlocks)[i]->GetNumDataCodewords();
   }
   CFX_ByteArray resultBytes;
   for (int32_t j = 0; j < dataBlocks->GetSize(); j++) {
     CBC_QRDataBlock* dataBlock = (*dataBlocks)[j];
     CFX_ByteArray* codewordBytes = dataBlock->GetCodewords();
     int32_t numDataCodewords = dataBlock->GetNumDataCodewords();
     CorrectErrors(codewordBytes, numDataCodewords, e);
     if (e != BCExceptionNO) {
       for (int32_t k = 0; k < dataBlocks->GetSize(); k++) {
         delete (*dataBlocks)[k];
       }
       delete dataBlocks;
-      return NULL;
+      return nullptr;
     }
     for (int32_t i = 0; i < numDataCodewords; i++) {
       resultBytes.Add((*codewordBytes)[i]);
     }
   }
   for (int32_t k = 0; k < dataBlocks->GetSize(); k++) {
     delete (*dataBlocks)[k];
   }
   delete dataBlocks;
   CBC_CommonDecoderResult* cdr = CBC_QRDecodedBitStreamParser::Decode(
       &resultBytes, version, ecLevel, byteModeDecode, e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   return cdr;
 }
 void CBC_QRCoderDecoder::CorrectErrors(CFX_ByteArray* codewordBytes,
                                        int32_t numDataCodewords,
                                        int32_t& e) {
   int32_t numCodewords = codewordBytes->GetSize();
   CFX_Int32Array codewordsInts;
   codewordsInts.SetSize(numCodewords);
   for (int32_t i = 0; i < numCodewords; i++) {
     codewordsInts[i] = (int32_t)((*codewordBytes)[i] & 0xff);
   }
   int32_t numECCodewords = codewordBytes->GetSize() - numDataCodewords;
   m_rsDecoder->Decode(&codewordsInts, numECCodewords, e);
   BC_EXCEPTION_CHECK_ReturnVoid(e);
   for (int32_t k = 0; k < numDataCodewords; k++) {
     (*codewordBytes)[k] = (uint8_t)codewordsInts[k];
   }
 }