Get rid of NULLs in xfa/fxbarcode/

xfa/fxbarcode/pdf417/BC_PDF417DecodedBitStreamParser.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 2009 ZXing authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ skipping 61 matching lines @@
   while (codeIndex < codewords[0]) {
     switch (code) {
       case TEXT_COMPACTION_MODE_LATCH:
         codeIndex = textCompaction(codewords, codeIndex, result);
         break;
       case BYTE_COMPACTION_MODE_LATCH:
         codeIndex = byteCompaction(code, codewords, codeIndex, result);
         break;
       case NUMERIC_COMPACTION_MODE_LATCH:
         codeIndex = numericCompaction(codewords, codeIndex, result, e);
-        BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+        BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
         break;
       case MODE_SHIFT_TO_BYTE_COMPACTION_MODE:
         codeIndex = byteCompaction(code, codewords, codeIndex, result);
         break;
       case BYTE_COMPACTION_MODE_LATCH_6:
         codeIndex = byteCompaction(code, codewords, codeIndex, result);
         break;
       case BEGIN_MACRO_PDF417_CONTROL_BLOCK:
         codeIndex = decodeMacroBlock(codewords, codeIndex, resultMetadata, e);
         if (e != BCExceptionNO) {
           delete resultMetadata;
-          return NULL;
+          return nullptr;
         }
         break;
       default:
         codeIndex--;
         codeIndex = textCompaction(codewords, codeIndex, result);
         break;
     }
     if (codeIndex < codewords.GetSize()) {
       code = codewords[codeIndex++];
     } else {
       e = BCExceptionFormatInstance;
       delete resultMetadata;
-      return NULL;
+      return nullptr;
     }
   }
   if (result.GetLength() == 0) {
     e = BCExceptionFormatInstance;
     delete resultMetadata;
-    return NULL;
+    return nullptr;
   }
   CFX_ByteArray rawBytes;
   CBC_CommonDecoderResult* tempCd = new CBC_CommonDecoderResult();
   tempCd->Init(rawBytes, result, ecLevel, e);
   if (e != BCExceptionNO) {
     delete resultMetadata;
-    return NULL;
+    return nullptr;
   }
   tempCd->setOther(resultMetadata);
   return tempCd;
 }
 int32_t CBC_DecodedBitStreamPaser::decodeMacroBlock(
     CFX_Int32Array& codewords,
     int32_t codeIndex,
     CBC_PDF417ResultMetadata* resultMetadata,
     int32_t& e) {
   if (codeIndex + NUMBER_OF_SEQUENCE_CODEWORDS > codewords[0]) {
@@ skipping 352 matching lines @@
   for (int32_t i = 0; i < count; i++) {
     result = result * nineHundred + BigInteger(codewords[i]);
   }
   CFX_ByteString resultString(bigIntegerToString(result).c_str());
   if (resultString.GetAt(0) != '1') {
     e = BCExceptionFormatInstance;
     return ' ';
   }
   return resultString.Mid(1, resultString.GetLength() - 1);
 }