Clean up C-Style casts in CBC_CodeBase and subclasses

xfa/fxbarcode/cbc_qrcode.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_qrcode.h"
 
 #include "xfa/fxbarcode/BC_BinaryBitmap.h"
 #include "xfa/fxbarcode/BC_BufferedImageLuminanceSource.h"
 #include "xfa/fxbarcode/common/BC_GlobalHistogramBinarizer.h"
 #include "xfa/fxbarcode/qrcode/BC_QRCodeReader.h"
 #include "xfa/fxbarcode/qrcode/BC_QRCodeWriter.h"
 
-CBC_QRCode::CBC_QRCode() {
-  m_pBCReader = (CBC_Reader*)new (CBC_QRCodeReader);
-  ((CBC_QRCodeReader*)m_pBCReader)->Init();
-  m_pBCWriter = (CBC_Writer*)new (CBC_QRCodeWriter);
+CBC_QRCode::CBC_QRCode()
+    : CBC_CodeBase(new CBC_QRCodeReader, new CBC_QRCodeWriter) {
+  static_cast<CBC_QRCodeReader*>(m_pBCReader.get())->Init();
 }
 
-CBC_QRCode::~CBC_QRCode() {
-  delete (m_pBCReader);
-  delete (m_pBCWriter);
-}
+CBC_QRCode::~CBC_QRCode() {}
 
 FX_BOOL CBC_QRCode::SetVersion(int32_t version) {
   if (version < 0 || version > 40)
     return FALSE;
-  if (!m_pBCWriter)
-    return FALSE;
-  return ((CBC_QRCodeWriter*)m_pBCWriter)->SetVersion(version);
+  return m_pBCWriter &&
+         static_cast<CBC_QRCodeWriter*>(m_pBCWriter.get())->SetVersion(version);
 }
 
 FX_BOOL CBC_QRCode::SetErrorCorrectionLevel(int32_t level) {
   if (level < 0 || level > 3)
     return FALSE;
-  if (!m_pBCWriter)
-    return FALSE;
-  return ((CBC_TwoDimWriter*)m_pBCWriter)->SetErrorCorrectionLevel(level);
+
+  return m_pBCWriter &&
+         static_cast<CBC_TwoDimWriter*>(m_pBCWriter.get())
+             ->SetErrorCorrectionLevel(level);
 }
 
 FX_BOOL CBC_QRCode::Encode(const CFX_WideStringC& contents,
                            FX_BOOL isDevice,
                            int32_t& e) {
   int32_t outWidth = 0;
   int32_t outHeight = 0;
-  uint8_t* data =
-      ((CBC_QRCodeWriter*)m_pBCWriter)
-          ->Encode(CFX_WideString(contents),
-                   ((CBC_QRCodeWriter*)m_pBCWriter)->GetErrorCorrectionLevel(),
-                   outWidth, outHeight, e);
+  CBC_QRCodeWriter* pWriter = static_cast<CBC_QRCodeWriter*>(m_pBCWriter.get());
+  uint8_t* data = pWriter->Encode(CFX_WideString(contents),
+                                  pWriter->GetErrorCorrectionLevel(), outWidth,
+                                  outHeight, e);
   BC_EXCEPTION_CHECK_ReturnValue(e, FALSE);
-  ((CBC_TwoDimWriter*)m_pBCWriter)->RenderResult(data, outWidth, outHeight, e);
+  pWriter->RenderResult(data, outWidth, outHeight, e);
   FX_Free(data);
   BC_EXCEPTION_CHECK_ReturnValue(e, FALSE);
   return TRUE;
 }
 
 FX_BOOL CBC_QRCode::RenderDevice(CFX_RenderDevice* device,
                                  const CFX_Matrix* matrix,
                                  int32_t& e) {
-  ((CBC_TwoDimWriter*)m_pBCWriter)->RenderDeviceResult(device, matrix);
+  static_cast<CBC_TwoDimWriter*>(m_pBCWriter.get())
+      ->RenderDeviceResult(device, matrix);
   return TRUE;
 }
 
 FX_BOOL CBC_QRCode::RenderBitmap(CFX_DIBitmap*& pOutBitmap, int32_t& e) {
-  ((CBC_TwoDimWriter*)m_pBCWriter)->RenderBitmapResult(pOutBitmap, e);
+  static_cast<CBC_TwoDimWriter*>(m_pBCWriter.get())
+      ->RenderBitmapResult(pOutBitmap, e);
   BC_EXCEPTION_CHECK_ReturnValue(e, FALSE);
   return TRUE;
 }
 
 CFX_WideString CBC_QRCode::Decode(uint8_t* buf,
                                   int32_t width,
                                   int32_t height,
                                   int32_t& e) {
   CFX_WideString str;
   return str;
 }
 
 CFX_WideString CBC_QRCode::Decode(CFX_DIBitmap* pBitmap, int32_t& e) {
   CBC_BufferedImageLuminanceSource source(pBitmap);
   CBC_GlobalHistogramBinarizer binarizer(&source);
   CBC_BinaryBitmap bitmap(&binarizer);
   CFX_ByteString retStr = m_pBCReader->Decode(&bitmap, 0, e);
   BC_EXCEPTION_CHECK_ReturnValue(e, CFX_WideString());
   return CFX_WideString::FromUTF8(retStr.AsStringC());
 }