Use smart pointers for class owned pointers in xfa/fxbarcode

xfa/fxbarcode/oned/BC_OnedUPCAWriter.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");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 
 #include "core/fxge/include/cfx_gemodule.h"
 #include "xfa/fxbarcode/BC_Writer.h"
 #include "xfa/fxbarcode/oned/BC_OneDimWriter.h"
 #include "xfa/fxbarcode/oned/BC_OnedEAN13Writer.h"
 #include "xfa/fxbarcode/oned/BC_OnedUPCAWriter.h"
 
 CBC_OnedUPCAWriter::CBC_OnedUPCAWriter() {
-  m_subWriter = nullptr;
   m_bLeftPadding = TRUE;
   m_bRightPadding = TRUE;
 }
+
 void CBC_OnedUPCAWriter::Init() {
-  m_subWriter = new CBC_OnedEAN13Writer;
+  m_subWriter.reset(new CBC_OnedEAN13Writer);
 }
-CBC_OnedUPCAWriter::~CBC_OnedUPCAWriter() {
-  delete m_subWriter;
-}
+
+CBC_OnedUPCAWriter::~CBC_OnedUPCAWriter() {}
 
 FX_BOOL CBC_OnedUPCAWriter::CheckContentValidity(
     const CFX_WideStringC& contents) {
   for (FX_STRSIZE i = 0; i < contents.GetLength(); ++i) {
     if (contents.GetAt(i) < '0' || contents.GetAt(i) > '9')
       return FALSE;
   }
   return TRUE;
 }
 
 CFX_WideString CBC_OnedUPCAWriter::FilterContents(
     const CFX_WideStringC& contents) {
   CFX_WideString filtercontents;
   FX_WCHAR ch;
   for (int32_t i = 0; i < contents.GetLength(); i++) {
     ch = contents.GetAt(i);
     if (ch > 175) {
       i++;
       continue;
     }
     if (ch >= '0' && ch <= '9') {
       filtercontents += ch;
     }
   }
   return filtercontents;
 }
+
 int32_t CBC_OnedUPCAWriter::CalcChecksum(const CFX_ByteString& contents) {
   int32_t odd = 0;
   int32_t even = 0;
   int32_t j = 1;
   for (int32_t i = contents.GetLength() - 1; i >= 0; i--) {
     if (j % 2) {
       odd += FXSYS_atoi(contents.Mid(i, 1).c_str());
     } else {
       even += FXSYS_atoi(contents.Mid(i, 1).c_str());
     }
     j++;
   }
   int32_t checksum = (odd * 3 + even) % 10;
   checksum = (10 - checksum) % 10;
   return (checksum);
 }
+
 uint8_t* CBC_OnedUPCAWriter::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, nullptr);
   return ret;
 }
+
 uint8_t* CBC_OnedUPCAWriter::Encode(const CFX_ByteString& contents,
                                     BCFORMAT format,
                                     int32_t& outWidth,
                                     int32_t& outHeight,
                                     int32_t hints,
                                     int32_t& e) {
   if (format != BCFORMAT_UPC_A) {
     e = BCExceptionOnlyEncodeUPC_A;
     return nullptr;
   }
@@ skipping 176 matching lines @@
   FX_Free(pCharPos);
 }
 
 void CBC_OnedUPCAWriter::RenderResult(const CFX_WideStringC& contents,
                                       uint8_t* code,
                                       int32_t codeLength,
                                       FX_BOOL isDevice,
                                       int32_t& e) {
   CBC_OneDimWriter::RenderResult(contents, code, codeLength, isDevice, e);
 }