Add type cast definitions for CPDF_Boolean.

core/src/fpdfapi/fpdf_parser/fpdf_parser_objects.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_parser.h"
 #include "../../../include/fxcrt/fx_string.h"
 
 // static
@@ skipping 22 matching lines @@
     case PDFOBJ_STREAM:
       delete (CPDF_Stream*)this;
       break;
     default:
       delete this;
   }
 }
 CFX_ByteString CPDF_Object::GetString() const {
   switch (m_Type) {
     case PDFOBJ_BOOLEAN:
-      return ((CPDF_Boolean*)this)->m_bValue ? "true" : "false";
+      return AsBoolean()->m_bValue ? "true" : "false";
     case PDFOBJ_NUMBER:
       return ((CPDF_Number*)this)->GetString();
     case PDFOBJ_STRING:
       return ((CPDF_String*)this)->m_String;
     case PDFOBJ_NAME:
       return ((CPDF_Name*)this)->m_Name;
     case PDFOBJ_REFERENCE: {
       CPDF_Reference* pRef = (CPDF_Reference*)(void*)this;
       if (pRef->m_pObjList == NULL) {
         break;
@@ skipping 53 matching lines @@
 FX_FLOAT CPDF_Object::GetNumber16() const {
   return GetNumber();
 }
 int CPDF_Object::GetInteger() const {
   CFX_AutoRestorer<int> restorer(&s_nCurRefDepth);
   if (++s_nCurRefDepth > OBJECT_REF_MAX_DEPTH) {
     return 0;
   }
   switch (m_Type) {
     case PDFOBJ_BOOLEAN:
-      return ((CPDF_Boolean*)this)->m_bValue;
+      return this->AsBoolean()->m_bValue;
     case PDFOBJ_NUMBER:
       return ((CPDF_Number*)this)->GetInteger();
     case PDFOBJ_REFERENCE: {
       CPDF_Reference* pRef = (CPDF_Reference*)(void*)this;
       PARSE_CONTEXT context;
       FXSYS_memset(&context, 0, sizeof(PARSE_CONTEXT));
       if (pRef->m_pObjList == NULL) {
         return 0;
       }
       CPDF_Object* pObj =
@@ skipping 33 matching lines @@
 CPDF_Array* CPDF_Object::GetArray() const {
   if (m_Type == PDFOBJ_ARRAY)
     return (CPDF_Array*)this;
 
   return NULL;
 }
 void CPDF_Object::SetString(const CFX_ByteString& str) {
   ASSERT(this != NULL);
   switch (m_Type) {
     case PDFOBJ_BOOLEAN:
-      ((CPDF_Boolean*)this)->m_bValue = str == FX_BSTRC("true") ? 1 : 0;
+      AsBoolean()->m_bValue = (str == FX_BSTRC("true"));
       return;
     case PDFOBJ_NUMBER:
       ((CPDF_Number*)this)->SetString(str);
       return;
     case PDFOBJ_STRING:
       ((CPDF_String*)this)->m_String = str;
       return;
     case PDFOBJ_NAME:
       ((CPDF_Name*)this)->m_Name = str;
       return;
@@ skipping 18 matching lines @@
     if (m_Type == PDFOBJ_REFERENCE && GetDirect()) {
       return GetDirect()->IsIdentical(pOther);
     }
     if (pOther->m_Type == PDFOBJ_REFERENCE) {
       return IsIdentical(pOther->GetDirect());
     }
     return FALSE;
   }
   switch (m_Type) {
     case PDFOBJ_BOOLEAN:
-      return (((CPDF_Boolean*)this)->Identical((CPDF_Boolean*)pOther));
+      return this->AsBoolean()->Identical(pOther->AsBoolean());
     case PDFOBJ_NUMBER:
       return (((CPDF_Number*)this)->Identical((CPDF_Number*)pOther));
     case PDFOBJ_STRING:
       return (((CPDF_String*)this)->Identical((CPDF_String*)pOther));
     case PDFOBJ_NAME:
       return (((CPDF_Name*)this)->Identical((CPDF_Name*)pOther));
     case PDFOBJ_ARRAY:
       return (((CPDF_Array*)this)->Identical((CPDF_Array*)pOther));
     case PDFOBJ_DICTIONARY:
       return this->AsDictionary()->Identical(pOther->AsDictionary());
@@ skipping 17 matching lines @@
   return pRef->m_pObjList->GetIndirectObject(pRef->GetRefObjNum());
 }
 CPDF_Object* CPDF_Object::Clone(FX_BOOL bDirect) const {
   CFX_MapPtrToPtr visited;
   return CloneInternal(bDirect, &visited);
 }
 CPDF_Object* CPDF_Object::CloneInternal(FX_BOOL bDirect,
                                         CFX_MapPtrToPtr* visited) const {
   switch (m_Type) {
     case PDFOBJ_BOOLEAN:
-      return new CPDF_Boolean(((CPDF_Boolean*)this)->m_bValue);
+      return new CPDF_Boolean(this->AsBoolean()->m_bValue);
     case PDFOBJ_NUMBER:
       return new CPDF_Number(((CPDF_Number*)this)->m_bInteger,
                              &((CPDF_Number*)this)->m_Integer);
     case PDFOBJ_STRING:
       return new CPDF_String(((CPDF_String*)this)->m_String,
                              ((CPDF_String*)this)->IsHex());
     case PDFOBJ_NAME:
       return new CPDF_Name(((CPDF_Name*)this)->m_Name);
     case PDFOBJ_ARRAY: {
       CPDF_Array* pCopy = new CPDF_Array();
@@ skipping 71 matching lines @@
 void CPDF_Object::SetUnicodeText(const FX_WCHAR* pUnicodes, int len) {
   if (m_Type == PDFOBJ_STRING) {
     ((CPDF_String*)this)->m_String = PDF_EncodeText(pUnicodes, len);
   } else if (m_Type == PDFOBJ_STREAM) {
     CFX_ByteString result = PDF_EncodeText(pUnicodes, len);
     ((CPDF_Stream*)this)
         ->SetData((uint8_t*)result.c_str(), result.GetLength(), FALSE, FALSE);
   }
 }
 
+CPDF_Boolean* CPDF_Object::AsBoolean() {
+  return IsBoolean() ? static_cast<CPDF_Boolean*>(this) : nullptr;
+}
+
+const CPDF_Boolean* CPDF_Object::AsBoolean() const {
+  return IsBoolean() ? static_cast<const CPDF_Boolean*>(this) : nullptr;
+}
+
 CPDF_Dictionary* CPDF_Object::AsDictionary() {
   return IsDictionary() ? static_cast<CPDF_Dictionary*>(this) : nullptr;
 }
 
 const CPDF_Dictionary* CPDF_Object::AsDictionary() const {
   return IsDictionary() ? static_cast<const CPDF_Dictionary*>(this) : nullptr;
 }
 
 CPDF_Number::CPDF_Number(int value)
     : CPDF_Object(PDFOBJ_NUMBER), m_bInteger(TRUE), m_Integer(value) {}
@@ skipping 306 matching lines @@
   m_Map.Lookup(key, (void*&)p);
   if (p) {
     return p->GetNumber();
   }
   return 0;
 }
 FX_BOOL CPDF_Dictionary::GetBoolean(const CFX_ByteStringC& key,
                                     FX_BOOL bDefault) const {
   CPDF_Object* p = NULL;
   m_Map.Lookup(key, (void*&)p);
-  if (p && p->GetType() == PDFOBJ_BOOLEAN) {
+  if (ToBoolean(p))
     return p->GetInteger();
-  }
   return bDefault;
 }
 CPDF_Dictionary* CPDF_Dictionary::GetDict(const CFX_ByteStringC& key) const {
   CPDF_Object* p = GetElementValue(key);
   if (!p) {
     return nullptr;
   }
   if (CPDF_Dictionary* pDict = p->AsDictionary()) {
     return pDict;
   }
@@ skipping 529 matching lines @@
   }
   pObj->m_ObjNum = objnum;
   m_IndirectObjs.SetAt((void*)(uintptr_t)objnum, pObj);
   if (m_LastObjNum < objnum) {
     m_LastObjNum = objnum;
   }
 }
 FX_DWORD CPDF_IndirectObjects::GetLastObjNum() const {
   return m_LastObjNum;
 }