Clean up C-Style casts in CBC_CodeBase and subclasses

xfa/fxbarcode/cbc_ean13.cpp

 // Copyright 2016 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
 /*
  * Copyright 2011 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 "xfa/fxbarcode/cbc_ean13.h"
 
 #include "xfa/fxbarcode/BC_BinaryBitmap.h"
 #include "xfa/fxbarcode/BC_BufferedImageLuminanceSource.h"
 #include "xfa/fxbarcode/common/BC_GlobalHistogramBinarizer.h"
 #include "xfa/fxbarcode/oned/BC_OnedEAN13Reader.h"
 #include "xfa/fxbarcode/oned/BC_OnedEAN13Writer.h"
 
-CBC_EAN13::CBC_EAN13() {
-  m_pBCReader = (CBC_Reader*)new (CBC_OnedEAN13Reader);
-  m_pBCWriter = (CBC_Writer*)new (CBC_OnedEAN13Writer);
-}
+CBC_EAN13::CBC_EAN13()
+    : CBC_OneCode(new CBC_OnedEAN13Reader, new CBC_OnedEAN13Writer) {}
 
-CBC_EAN13::~CBC_EAN13() {
-  delete (m_pBCReader);
-  delete (m_pBCWriter);
-}
+CBC_EAN13::~CBC_EAN13() {}
 
 CFX_WideString CBC_EAN13::Preprocess(const CFX_WideStringC& contents) {
   CFX_WideString encodeContents =
-      ((CBC_OnedEAN13Writer*)m_pBCWriter)->FilterContents(contents);
+      static_cast<CBC_OnedEAN13Writer*>(m_pBCWriter.get())
+          ->FilterContents(contents);
   int32_t length = encodeContents.GetLength();
   if (length <= 12) {
     for (int32_t i = 0; i < 12 - length; i++)
       encodeContents = FX_WCHAR('0') + encodeContents;
 
     CFX_ByteString byteString = encodeContents.UTF8Encode();
-    int32_t checksum =
-        ((CBC_OnedEAN13Writer*)m_pBCWriter)->CalcChecksum(byteString);
+    int32_t checksum = static_cast<CBC_OnedEAN13Writer*>(m_pBCWriter.get())
+                           ->CalcChecksum(byteString);
     byteString += checksum - 0 + '0';
     encodeContents = byteString.UTF8Decode();
   }
   if (length > 13)
     encodeContents = encodeContents.Mid(0, 13);
 
   return encodeContents;
 }
 
 FX_BOOL CBC_EAN13::Encode(const CFX_WideStringC& contents,
                           FX_BOOL isDevice,
                           int32_t& e) {
   if (contents.IsEmpty()) {
     e = BCExceptionNoContents;
     return FALSE;
   }
   BCFORMAT format = BCFORMAT_EAN_13;
   int32_t outWidth = 0;
   int32_t outHeight = 0;
   CFX_WideString encodeContents = Preprocess(contents);
   CFX_ByteString byteString = encodeContents.UTF8Encode();
   m_renderContents = encodeContents;
-  uint8_t* data = static_cast<CBC_OnedEAN13Writer*>(m_pBCWriter)
+  uint8_t* data = static_cast<CBC_OnedEAN13Writer*>(m_pBCWriter.get())
                       ->Encode(byteString, format, outWidth, outHeight, e);
   BC_EXCEPTION_CHECK_ReturnValue(e, FALSE);
-  ((CBC_OneDimWriter*)m_pBCWriter)
+  static_cast<CBC_OneDimWriter*>(m_pBCWriter.get())
       ->RenderResult(encodeContents.AsStringC(), data, outWidth, isDevice, e);
   FX_Free(data);
   BC_EXCEPTION_CHECK_ReturnValue(e, FALSE);
   return TRUE;
 }
 
 FX_BOOL CBC_EAN13::RenderDevice(CFX_RenderDevice* device,
                                 const CFX_Matrix* matrix,
                                 int32_t& e) {
-  ((CBC_OneDimWriter*)m_pBCWriter)
+  static_cast<CBC_OneDimWriter*>(m_pBCWriter.get())
       ->RenderDeviceResult(device, matrix, m_renderContents.AsStringC(), e);
   BC_EXCEPTION_CHECK_ReturnValue(e, FALSE);
   return TRUE;
 }
 
 FX_BOOL CBC_EAN13::RenderBitmap(CFX_DIBitmap*& pOutBitmap, int32_t& e) {
-  ((CBC_OneDimWriter*)m_pBCWriter)
+  static_cast<CBC_OneDimWriter*>(m_pBCWriter.get())
       ->RenderBitmapResult(pOutBitmap, m_renderContents.AsStringC(), e);
   BC_EXCEPTION_CHECK_ReturnValue(e, FALSE);
   return TRUE;
 }
 
 CFX_WideString CBC_EAN13::Decode(uint8_t* buf,
                                  int32_t width,
                                  int32_t height,
                                  int32_t& e) {
   CFX_WideString str;
   return str;
 }
 
 CFX_WideString CBC_EAN13::Decode(CFX_DIBitmap* pBitmap, int32_t& e) {
   CBC_BufferedImageLuminanceSource source(pBitmap);
   CBC_GlobalHistogramBinarizer binarizer(&source);
   CBC_BinaryBitmap bitmap(&binarizer);
   CFX_ByteString str = m_pBCReader->Decode(&bitmap, 0, e);
   BC_EXCEPTION_CHECK_ReturnValue(e, CFX_WideString());
   return CFX_WideString::FromUTF8(str.AsStringC());
 }