Get rid of NULLs in xfa/fxbarcode/

xfa/fxbarcode/oned/BC_OneDimReader.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 27 matching lines @@
     {3, 2, 1, 1}, {2, 2, 2, 1}, {2, 1, 2, 2}, {1, 4, 1, 1}, {1, 1, 3, 2},
     {1, 2, 3, 1}, {1, 1, 1, 4}, {1, 3, 1, 2}, {1, 2, 1, 3}, {3, 1, 1, 2},
     {1, 1, 2, 3}, {1, 2, 2, 2}, {2, 2, 1, 2}, {1, 1, 4, 1}, {2, 3, 1, 1},
     {1, 3, 2, 1}, {4, 1, 1, 1}, {2, 1, 3, 1}, {3, 1, 2, 1}, {2, 1, 1, 3}};
 
 CBC_OneDimReader::CBC_OneDimReader() {}
 CBC_OneDimReader::~CBC_OneDimReader() {}
 CFX_Int32Array* CBC_OneDimReader::FindStartGuardPattern(CBC_CommonBitArray* row,
                                                         int32_t& e) {
   FX_BOOL foundStart = FALSE;
-  CFX_Int32Array* startRange = NULL;
+  CFX_Int32Array* startRange = nullptr;
   CFX_Int32Array startEndPattern;
   startEndPattern.SetSize(3);
   startEndPattern[0] = START_END_PATTERN[0];
   startEndPattern[1] = START_END_PATTERN[1];
   startEndPattern[2] = START_END_PATTERN[2];
   int32_t nextStart = 0;
   while (!foundStart) {
     delete startRange;
     startRange = FindGuardPattern(row, nextStart, FALSE, &startEndPattern, e);
-    BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+    BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
     int32_t start = (*startRange)[0];
     nextStart = (*startRange)[1];
     if (start <= 1) {
       break;
     }
     int32_t quietStart = start - (nextStart - start);
     if (quietStart >= 0) {
       FX_BOOL booT = row->IsRange(quietStart, start, FALSE, e);
-      BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+      BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
       foundStart = booT;
     }
   }
   return startRange;
 }
 CFX_ByteString CBC_OneDimReader::DecodeRow(int32_t rowNumber,
                                            CBC_CommonBitArray* row,
                                            int32_t hints,
                                            int32_t& e) {
   std::unique_ptr<CFX_Int32Array> result(FindStartGuardPattern(row, e));
@@ skipping 51 matching lines @@
 }
 CFX_Int32Array* CBC_OneDimReader::DecodeEnd(CBC_CommonBitArray* row,
                                             int32_t endStart,
                                             int32_t& e) {
   CFX_Int32Array startEndPattern;
   startEndPattern.Add(START_END_PATTERN[0]);
   startEndPattern.Add(START_END_PATTERN[1]);
   startEndPattern.Add(START_END_PATTERN[2]);
   CFX_Int32Array* FindGuard =
       FindGuardPattern(row, endStart, FALSE, &startEndPattern, e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   return FindGuard;
 }
 CFX_Int32Array* CBC_OneDimReader::FindGuardPattern(CBC_CommonBitArray* row,
                                                    int32_t rowOffset,
                                                    FX_BOOL whiteFirst,
                                                    CFX_Int32Array* pattern,
                                                    int32_t& e) {
   int32_t patternLength = pattern->GetSize();
   CFX_Int32Array counters;
   counters.SetSize(patternLength);
@@ skipping 30 matching lines @@
         counters[patternLength - 1] = 0;
         counterPosition--;
       } else {
         counterPosition++;
       }
       counters[counterPosition] = 1;
       isWhite = !isWhite;
     }
   }
   e = BCExceptionNotFound;
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
-  return NULL;
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
+  return nullptr;
 }
 int32_t CBC_OneDimReader::DecodeDigit(CBC_CommonBitArray* row,
                                       CFX_Int32Array* counters,
                                       int32_t rowOffset,
                                       const int32_t* patterns,
                                       int32_t patternLength,
                                       int32_t& e) {
   RecordPattern(row, rowOffset, counters, e);
   BC_EXCEPTION_CHECK_ReturnValue(e, 0);
   int32_t bestVariance = MAX_AVG_VARIANCE;
   int32_t bestMatch = -1;
   int32_t max = patternLength;
   for (int32_t i = 0; i < max; i++) {
     int32_t variance = PatternMatchVariance(counters, &patterns[i * 4],
                                             MAX_INDIVIDUAL_VARIANCE);
     if (variance < bestVariance) {
       bestVariance = variance;
       bestMatch = i;
     }
   }
   if (bestMatch >= 0) {
     return bestMatch;
   }
   e = BCExceptionNotFound;
   return 0;
 }