Remove implicit conversions and some cleanup

fpdfsdk/src/fpdfdoc.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
 
 #include "public/fpdf_doc.h"
 
 #include "fpdfsdk/include/fsdk_define.h"
 
 namespace {
 
 int THISMODULE = 0;
 
 CPDF_Bookmark FindBookmark(const CPDF_BookmarkTree& tree,
                            CPDF_Bookmark bookmark,
                            const CFX_WideString& title) {
-  if (bookmark && bookmark.GetTitle().CompareNoCase(title.c_str()) == 0) {
+  if (bookmark.GetDict() &&
+      bookmark.GetTitle().CompareNoCase(title.c_str()) == 0) {
     // First check this item
     return bookmark;
   }
   // go into children items
   CPDF_Bookmark child = tree.GetFirstChild(bookmark);
-  while (child) {
+  while (child.GetDict()) {
     // check if this item
     CPDF_Bookmark found = FindBookmark(tree, child, title);
-    if (found)
+    if (found.GetDict())
       return found;
     child = tree.GetNextSibling(child);
   }
   return CPDF_Bookmark();
 }
 
 void ReleaseLinkList(void* data) {
   delete (CPDF_LinkList*)data;
 }
 
@@ skipping 67 matching lines @@
 
 DLLEXPORT FPDF_DEST STDCALL FPDFBookmark_GetDest(FPDF_DOCUMENT document,
                                                  FPDF_BOOKMARK pDict) {
   if (!pDict)
     return nullptr;
   CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
   if (!pDoc)
     return nullptr;
   CPDF_Bookmark bookmark(ToDictionary(static_cast<CPDF_Object*>(pDict)));
   CPDF_Dest dest = bookmark.GetDest(pDoc);
-  if (dest)
+  if (dest.GetObject())
     return dest.GetObject();
   // If this bookmark is not directly associated with a dest, we try to get
   // action
   CPDF_Action action = bookmark.GetAction();
   if (!action)
     return nullptr;
   return action.GetDest(pDoc).GetObject();
 }
 
 DLLEXPORT FPDF_ACTION STDCALL FPDFBookmark_GetAction(FPDF_BOOKMARK pDict) {
@@ skipping 220 matching lines @@
     return 0;
   CFX_WideString text = pInfo->GetUnicodeTextBy(tag);
   // Use UTF-16LE encoding
   CFX_ByteString encodedText = text.UTF16LE_Encode();
   unsigned long len = encodedText.GetLength();
   if (buffer && buflen >= len) {
     FXSYS_memcpy(buffer, encodedText.c_str(), len);
   }
   return len;
 }