Add type cast definitions for CPDF_Number.

core/src/fpdfdoc/doc_basic.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 "../../include/fpdfdoc/fpdf_doc.h"
 const int nMaxRecursion = 32;
 int CPDF_Dest::GetPageIndex(CPDF_Document* pDoc) {
   if (m_pObj == NULL || m_pObj->GetType() != PDFOBJ_ARRAY) {
     return 0;
   }
   CPDF_Object* pPage = ((CPDF_Array*)m_pObj)->GetElementValue(0);
-  if (pPage == NULL) {
+  if (!pPage)
     return 0;
-  }
-  if (pPage->GetType() == PDFOBJ_NUMBER) {
+  if (pPage->IsNumber())
     return pPage->GetInteger();
-  }
-  if (!pPage->IsDictionary()) {
+  if (!pPage->IsDictionary())
     return 0;
-  }
   return pDoc->GetPageIndex(pPage->GetObjNum());
 }
 FX_DWORD CPDF_Dest::GetPageObjNum() {
   if (m_pObj == NULL || m_pObj->GetType() != PDFOBJ_ARRAY) {
     return 0;
   }
   CPDF_Object* pPage = ((CPDF_Array*)m_pObj)->GetElementValue(0);
-  if (pPage == NULL) {
+  if (!pPage)
     return 0;
-  }
-  if (pPage->GetType() == PDFOBJ_NUMBER) {
+  if (pPage->IsNumber())
     return pPage->GetInteger();
-  }
-  if (pPage->IsDictionary()) {
+  if (pPage->IsDictionary())
     return pPage->GetObjNum();
-  }
   return 0;
 }
 const FX_CHAR* g_sZoomModes[] = {"XYZ",  "Fit",   "FitH",  "FitV", "FitR",
                                  "FitB", "FitBH", "FitBV", ""};
 int CPDF_Dest::GetZoomMode() {
   if (m_pObj == NULL || m_pObj->GetType() != PDFOBJ_ARRAY) {
     return 0;
   }
   CFX_ByteString mode;
   CPDF_Object* pObj = ((CPDF_Array*)m_pObj)->GetElementValue(1);
@@ skipping 494 matching lines @@
   int nPage = FXSYS_atoi(bsLbl);
   if (nPage > 0 && nPage <= nPages) {
     return nPage;
   }
   return -1;
 }
 int32_t CPDF_PageLabel::GetPageByLabel(const CFX_WideStringC& wsLabel) const {
   CFX_ByteString bsLabel = PDF_EncodeText(wsLabel.GetPtr());
   return GetPageByLabel(bsLabel);
 }