Get rid of NULLs in xfa/fxbarcode/

xfa/fxbarcode/oned/BC_OnedCode39Writer.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 2010 ZXing authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ skipping 196 matching lines @@
   }
   m_iWideNarrRatio = ratio;
   return TRUE;
 }
 uint8_t* CBC_OnedCode39Writer::Encode(const CFX_ByteString& contents,
                                       BCFORMAT format,
                                       int32_t& outWidth,
                                       int32_t& outHeight,
                                       int32_t& e) {
   uint8_t* ret = Encode(contents, format, outWidth, outHeight, 0, e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   return ret;
 }
 uint8_t* CBC_OnedCode39Writer::Encode(const CFX_ByteString& contents,
                                       BCFORMAT format,
                                       int32_t& outWidth,
                                       int32_t& outHeight,
                                       int32_t hints,
                                       int32_t& e) {
   if (format != BCFORMAT_CODE_39) {
     e = BCExceptionOnlyEncodeCODE_39;
-    return NULL;
+    return nullptr;
   }
   uint8_t* ret =
       CBC_OneDimWriter::Encode(contents, format, outWidth, outHeight, hints, e);
-  BC_EXCEPTION_CHECK_ReturnValue(e, NULL);
+  BC_EXCEPTION_CHECK_ReturnValue(e, nullptr);
   return ret;
 }
 void CBC_OnedCode39Writer::ToIntArray(int32_t a, int32_t* toReturn) {
   for (int32_t i = 0; i < 9; i++) {
     toReturn[i] = (a & (1 << i)) == 0 ? 1 : m_iWideNarrRatio;
   }
 }
 FX_CHAR CBC_OnedCode39Writer::CalcCheckSum(const CFX_ByteString& contents,
                                            int32_t& e) {
   int32_t length = contents.GetLength();
@@ skipping 21 matching lines @@
     }
   }
   checksum = checksum % 43;
   return CBC_OnedCode39Reader::CHECKSUM_STRING[checksum];
 }
 uint8_t* CBC_OnedCode39Writer::Encode(const CFX_ByteString& contents,
                                       int32_t& outlength,
                                       int32_t& e) {
   FX_CHAR checksum = CalcCheckSum(contents, e);
   if (checksum == '*') {
-    return NULL;
+    return nullptr;
   }
   int32_t widths[9] = {0};
   int32_t wideStrideNum = 3;
   int32_t narrStrideNum = 9 - wideStrideNum;
   CFX_ByteString encodedContents = contents;
   if (m_bCalcChecksum) {
     encodedContents += checksum;
   }
   m_iContentLen = encodedContents.GetLength();
   int32_t codeWidth = (wideStrideNum * m_iWideNarrRatio + narrStrideNum) * 2 +
                       1 + m_iContentLen;
   int32_t len = (int32_t)strlen(CBC_OnedCode39Reader::ALPHABET_STRING);
   for (int32_t j = 0; j < m_iContentLen; j++) {
     for (int32_t i = 0; i < len; i++) {
       if (CBC_OnedCode39Reader::ALPHABET_STRING[i] == encodedContents[j]) {
         ToIntArray(CBC_OnedCode39Reader::CHARACTER_ENCODINGS[i], widths);
         for (int32_t k = 0; k < 9; k++) {
           codeWidth += widths[k];
         }
       }
     }
   }
   outlength = codeWidth;
   uint8_t* result = FX_Alloc(uint8_t, codeWidth);
   ToIntArray(CBC_OnedCode39Reader::CHARACTER_ENCODINGS[39], widths);
   int32_t pos = AppendPattern(result, 0, widths, 9, 1, e);
   if (e != BCExceptionNO) {
     FX_Free(result);
-    return NULL;
+    return nullptr;
   }
   int32_t narrowWhite[] = {1};
   pos += AppendPattern(result, pos, narrowWhite, 1, 0, e);
   if (e != BCExceptionNO) {
     FX_Free(result);
-    return NULL;
+    return nullptr;
   }
   for (int32_t l = m_iContentLen - 1; l >= 0; l--) {
     for (int32_t i = 0; i < len; i++) {
       if (CBC_OnedCode39Reader::ALPHABET_STRING[i] == encodedContents[l]) {
         ToIntArray(CBC_OnedCode39Reader::CHARACTER_ENCODINGS[i], widths);
         pos += AppendPattern(result, pos, widths, 9, 1, e);
         if (e != BCExceptionNO) {
           FX_Free(result);
-          return NULL;
+          return nullptr;
         }
       }
     }
     pos += AppendPattern(result, pos, narrowWhite, 1, 0, e);
     if (e != BCExceptionNO) {
       FX_Free(result);
-      return NULL;
+      return nullptr;
     }
   }
   ToIntArray(CBC_OnedCode39Reader::CHARACTER_ENCODINGS[39], widths);
   pos += AppendPattern(result, pos, widths, 9, 1, e);
   if (e != BCExceptionNO) {
     FX_Free(result);
-    return NULL;
+    return nullptr;
   }
   for (int32_t i = 0; i < codeWidth / 2; i++) {
     result[i] ^= result[codeWidth - 1 - i];
     result[codeWidth - 1 - i] ^= result[i];
     result[i] ^= result[codeWidth - 1 - i];
   }
   return result;
 }
 CFX_WideString CBC_OnedCode39Writer::encodedContents(
     const CFX_WideStringC& contents,
@@ skipping 13 matching lines @@
 void CBC_OnedCode39Writer::RenderResult(const CFX_WideStringC& contents,
                                         uint8_t* code,
                                         int32_t codeLength,
                                         FX_BOOL isDevice,
                                         int32_t& e) {
   CFX_WideString encodedCon = encodedContents(contents, e);
   BC_EXCEPTION_CHECK_ReturnVoid(e);
   CBC_OneDimWriter::RenderResult(encodedCon.AsStringC(), code, codeLength,
                                  isDevice, e);
 }