Get rid of NULLs in xfa/fxbarcode/

xfa/fxbarcode/qrcode/BC_QRDetector.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 23 matching lines @@
 #include "xfa/fxbarcode/qrcode/BC_QRDetectorResult.h"
 #include "xfa/fxbarcode/qrcode/BC_QRFinderPattern.h"
 #include "xfa/fxbarcode/qrcode/BC_QRFinderPatternFinder.h"
 #include "xfa/fxbarcode/qrcode/BC_QRGridSampler.h"
 
 CBC_QRDetector::CBC_QRDetector(CBC_CommonBitMatrix* image) : m_image(image) {}
 CBC_QRDetector::~CBC_QRDetector() {}
 CBC_QRDetectorResult* CBC_QRDetector::Detect(int32_t hints, int32_t& e) {
   CBC_QRFinderPatternFinder finder(m_image);
   std::unique_ptr<CBC_QRFinderPatternInfo> info(finder.Find(hints, e));
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   CBC_QRDetectorResult* qdr = ProcessFinderPatternInfo(info.get(), e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   return qdr;
 }
 CBC_QRDetectorResult* CBC_QRDetector::ProcessFinderPatternInfo(
     CBC_QRFinderPatternInfo* info,
     int32_t& e) {
   std::unique_ptr<CBC_QRFinderPattern> topLeft(info->GetTopLeft());
   std::unique_ptr<CBC_QRFinderPattern> topRight(info->GetTopRight());
   std::unique_ptr<CBC_QRFinderPattern> bottomLeft(info->GetBottomLeft());
   FX_FLOAT moduleSize =
       CalculateModuleSize(topLeft.get(), topRight.get(), bottomLeft.get());
@@ skipping 28 matching lines @@
           moduleSize, estAlignmentX, estAlignmentY, (FX_FLOAT)i, e);
       if (temp) {
         alignmentPattern = temp;
         break;
       }
     }
   }
   CBC_CommonBitMatrix* bits =
       SampleGrid(m_image, topLeft.get(), topRight.get(), bottomLeft.get(),
                  (CBC_ResultPoint*)(alignmentPattern), dimension, e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
 
   CFX_ArrayTemplate<CBC_ResultPoint*>* points =
       new CFX_ArrayTemplate<CBC_ResultPoint*>();
   points->Add(bottomLeft.release());
   points->Add(topLeft.release());
   points->Add(topRight.release());
   if (alignmentPattern)
     points->Add(alignmentPattern);
   return new CBC_QRDetectorResult(bits, points);
 }
@@ skipping 18 matching lines @@
     bottomRightX = (topRight->GetX() - topLeft->GetX()) + bottomLeft->GetX();
     bottomRightY = (topRight->GetY() - topLeft->GetY()) + bottomLeft->GetY();
     sourceBottomRightX = sourceBottomRightY = dimMinusThree;
   }
   CBC_QRGridSampler& sampler = CBC_QRGridSampler::GetInstance();
   CBC_CommonBitMatrix* cbm = sampler.SampleGrid(
       image, dimension, dimension, 3.5f, 3.5f, dimMinusThree, 3.5f,
       sourceBottomRightX, sourceBottomRightY, 3.5f, dimMinusThree,
       topLeft->GetX(), topLeft->GetY(), topRight->GetX(), topRight->GetY(),
       bottomRightX, bottomRightY, bottomLeft->GetX(), bottomLeft->GetY(), e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   return cbm;
 }
 int32_t CBC_QRDetector::ComputeDimension(CBC_ResultPoint* topLeft,
                                          CBC_ResultPoint* topRight,
                                          CBC_ResultPoint* bottomLeft,
                                          FX_FLOAT moduleSize,
                                          int32_t& e) {
   int32_t tltrCentersDimension = Round(
       CBC_QRFinderPatternFinder::Distance(topLeft, topRight) / moduleSize);
   int32_t tlblCentersDimension = Round(
@@ skipping 111 matching lines @@
     int32_t estAlignmentX,
     int32_t estAlignmentY,
     FX_FLOAT allowanceFactor,
     int32_t& e) {
   int32_t allowance = (int32_t)(allowanceFactor * overallEstModuleSize);
   int32_t alignmentAreaLeftX = std::max(0, estAlignmentX - allowance);
   int32_t alignmentAreaRightX =
       std::min(m_image->GetWidth() - 1, estAlignmentX + allowance);
   if (alignmentAreaRightX - alignmentAreaLeftX < overallEstModuleSize * 3) {
     e = BCExceptionRead;
-    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+    BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   }
   int32_t alignmentAreaTopY = std::max(0, estAlignmentY - allowance);
   int32_t alignmentAreaBottomY =
       std::min(m_image->GetHeight() - 1, estAlignmentY + allowance);
   CBC_QRAlignmentPatternFinder alignmentFinder(
       m_image, alignmentAreaLeftX, alignmentAreaTopY,
       alignmentAreaRightX - alignmentAreaLeftX,
       alignmentAreaBottomY - alignmentAreaTopY, overallEstModuleSize);
   CBC_QRAlignmentPattern* qap = alignmentFinder.Find(e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   return qap;
 }