Get rid of NULLs in xfa/fxbarcode/

xfa/fxbarcode/oned/BC_OnedCode128Reader.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 87 matching lines @@
               &counters, &CODE_PATTERNS[startCode][0], MAX_INDIVIDUAL_VARIANCE);
           if (variance < bestVariance) {
             bestVariance = variance;
             bestMatch = startCode;
           }
         }
         if (bestMatch >= 0) {
           FX_BOOL btemp2 =
               row->IsRange(std::max(0, patternStart - (i - patternStart) / 2),
                            patternStart, FALSE, e);
-          BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+          BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
           if (btemp2) {
             CFX_Int32Array* result = new CFX_Int32Array;
             result->SetSize(3);
             (*result)[0] = patternStart;
             (*result)[1] = i;
             (*result)[2] = bestMatch;
             return result;
           }
         }
         patternStart += counters[0] + counters[1];
         for (int32_t y = 2; y < patternLength; y++) {
           counters[y - 2] = counters[y];
         }
         counters[patternLength - 2] = 0;
         counters[patternLength - 1] = 0;
         counterPosition--;
       } else {
         counterPosition++;
       }
       counters[counterPosition] = 1;
       isWhite = !isWhite;
     }
   }
   e = BCExceptionNotFound;
-  return NULL;
+  return nullptr;
 }
 int32_t CBC_OnedCode128Reader::DecodeCode(CBC_CommonBitArray* row,
                                           CFX_Int32Array* counters,
                                           int32_t rowOffset,
                                           int32_t& e) {
   RecordPattern(row, rowOffset, counters, e);
   BC_EXCEPTION_CHECK_ReturnValue(e, 0);
   int32_t bestVariance = MAX_AVG_VARIANCE;
   int32_t bestMatch = -1;
   for (int32_t d = 0; d < 107; d++) {
@@ skipping 25 matching lines @@
     case 104:
       codeSet = CODE_CODE_B;
       break;
     case 105:
       codeSet = CODE_CODE_C;
       break;
     default:
       if (startPatternInfo) {
         startPatternInfo->RemoveAll();
         delete startPatternInfo;
-        startPatternInfo = NULL;
+        startPatternInfo = nullptr;
       }
       e = BCExceptionFormatException;
       return "";
   }
   FX_BOOL done = FALSE;
   FX_BOOL isNextShifted = FALSE;
   CFX_ByteString result;
   int32_t lastStart = (*startPatternInfo)[0];
   int32_t nextStart = (*startPatternInfo)[1];
   if (startPatternInfo) {
     startPatternInfo->RemoveAll();
     delete startPatternInfo;
-    startPatternInfo = NULL;
+    startPatternInfo = nullptr;
   }
   CFX_Int32Array counters;
   counters.SetSize(6);
   int32_t lastCode = 0;
   int32_t code = 0;
   int32_t checksumTotal = startCode;
   int32_t multiplier = 0;
   FX_BOOL lastCharacterWasPrintable = TRUE;
   while (!done) {
     FX_BOOL unshift = isNextShifted;
@@ skipping 137 matching lines @@
     } else {
       result = result.Mid(0, result.GetLength() - 1);
     }
   }
   if (result.GetLength() == 0) {
     e = BCExceptionFormatException;
     return "";
   }
   return result;
 }