Add type cast definitions for CPDF_Name.

core/src/fpdfapi/fpdf_page/fpdf_page_doc.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/fpdfapi/fpdf_page.h"
 #include "../../../include/fpdfapi/fpdf_module.h"
 #include "../../../include/fdrm/fx_crypt.h"
 #include "../fpdf_font/font_int.h"
@@ skipping 290 matching lines @@
   if (fontData->get()) {
     fontData->RemoveRef();
     if (fontData->use_count() == 0) {
       fontData->clear();
     }
   }
 }
 
 CPDF_ColorSpace* CPDF_DocPageData::GetColorSpace(CPDF_Object* pCSObj,
                                                  CPDF_Dictionary* pResources) {
-  if (!pCSObj) {
-    return NULL;
-  }
-  if (pCSObj->GetType() == PDFOBJ_NAME) {
+  if (!pCSObj)
+    return nullptr;
+
+  if (pCSObj->IsName()) {
     CFX_ByteString name = pCSObj->GetConstString();
     CPDF_ColorSpace* pCS = _CSFromName(name);
     if (!pCS && pResources) {
       CPDF_Dictionary* pList = pResources->GetDict(FX_BSTRC("ColorSpace"));
       if (pList) {
         pCSObj = pList->GetElementValue(name);
-        return GetColorSpace(pCSObj, NULL);
+        return GetColorSpace(pCSObj, nullptr);
       }
     }
-    if (pCS == NULL || pResources == NULL) {
+    if (!pCS || !pResources)
       return pCS;
-    }
+
     CPDF_Dictionary* pColorSpaces = pResources->GetDict(FX_BSTRC("ColorSpace"));
-    if (pColorSpaces == NULL) {
+    if (!pColorSpaces)
       return pCS;
-    }
-    CPDF_Object* pDefaultCS = NULL;
+
+    CPDF_Object* pDefaultCS = nullptr;
     switch (pCS->GetFamily()) {
       case PDFCS_DEVICERGB:
         pDefaultCS = pColorSpaces->GetElementValue(FX_BSTRC("DefaultRGB"));
         break;
       case PDFCS_DEVICEGRAY:
         pDefaultCS = pColorSpaces->GetElementValue(FX_BSTRC("DefaultGray"));
         break;
       case PDFCS_DEVICECMYK:
         pDefaultCS = pColorSpaces->GetElementValue(FX_BSTRC("DefaultCMYK"));
         break;
     }
-    if (pDefaultCS == NULL) {
-      return pCS;
-    }
-    return GetColorSpace(pDefaultCS, NULL);
+    return pDefaultCS ? GetColorSpace(pDefaultCS, nullptr) : pCS;
   }
 
   if (pCSObj->GetType() != PDFOBJ_ARRAY)
     return nullptr;
   CPDF_Array* pArray = (CPDF_Array*)pCSObj;
   if (pArray->GetCount() == 0)
     return nullptr;
   if (pArray->GetCount() == 1)
     return GetColorSpace(pArray->GetElementValue(0), pResources);
 
@@ skipping 244 matching lines @@
 }
 
 CPDF_CountedPattern* CPDF_DocPageData::FindPatternPtr(
     CPDF_Object* pPatternObj) const {
   if (!pPatternObj)
     return nullptr;
 
   auto it = m_PatternMap.find(pPatternObj);
   return it != m_PatternMap.end() ? it->second : nullptr;
 }