Add type cast definitions for CPDF_Number.

core/include/fpdfapi/fpdf_objects.h

 // 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
 
 #ifndef CORE_INCLUDE_FPDFAPI_FPDF_OBJECTS_H_
 #define CORE_INCLUDE_FPDFAPI_FPDF_OBJECTS_H_
 
 #include "../fxcrt/fx_coordinates.h"
@@ skipping 62 matching lines @@
   void SetString(const CFX_ByteString& str);
 
   void SetUnicodeText(const FX_WCHAR* pUnicodes, int len = -1);
 
   int GetDirectType() const;
 
   FX_BOOL IsModified() const { return FALSE; }
 
   bool IsBoolean() const { return m_Type == PDFOBJ_BOOLEAN; }
   bool IsDictionary() const { return m_Type == PDFOBJ_DICTIONARY; }
+  bool IsNumber() const { return m_Type == PDFOBJ_NUMBER; }

[Lei Zhang, 2015/10/21 14:45:50]

Do we want to do alphabetical order, or PDFOBJ_FOO value order? Darn thing isn't
an enum yet.

[dsinclair, 2015/10/21 15:00:11]

I'm doing alphabetical order as I think it makes the most sense, makes it easy
to see if your entry is in the list without looking at every one of them.

 
   CPDF_Boolean* AsBoolean();
   const CPDF_Boolean* AsBoolean() const;
 
   CPDF_Dictionary* AsDictionary();
   const CPDF_Dictionary* AsDictionary() const;
 
+  CPDF_Number* AsNumber();
+  const CPDF_Number* AsNumber() const;
+
  protected:
   CPDF_Object(FX_DWORD type) : m_Type(type), m_ObjNum(0), m_GenNum(0) {}
   ~CPDF_Object() {}
   void Destroy();
 
   static const int OBJECT_REF_MAX_DEPTH = 128;
   static int s_nCurRefDepth;
   FX_DWORD m_Type;
   FX_DWORD m_ObjNum;
   FX_DWORD m_GenNum;
@@ skipping 71 matching lines @@
  protected:
   FX_BOOL m_bInteger;
 
   union {
     int m_Integer;
 
     FX_FLOAT m_Float;
   };
   friend class CPDF_Object;
 };
+inline CPDF_Number* ToNumber(CPDF_Object* obj) {
+  return obj ? obj->AsNumber() : nullptr;
+}
+inline const CPDF_Number* ToNumber(const CPDF_Object* obj) {
+  return obj ? obj->AsNumber() : nullptr;
+}
+
 class CPDF_String : public CPDF_Object {
  public:
   static CPDF_String* Create(const CFX_ByteString& str, FX_BOOL bHex = FALSE) {
     return new CPDF_String(str, bHex);
   }
 
   static CPDF_String* Create(const CFX_WideString& str) {
     return new CPDF_String(str);
   }
 
@@ skipping 384 matching lines @@
 
  protected:
   CFX_MapPtrToPtr m_IndirectObjs;
 
   CPDF_Parser* m_pParser;
 
   FX_DWORD m_LastObjNum;
 };
 
 #endif  // CORE_INCLUDE_FPDFAPI_FPDF_OBJECTS_H_