Fix parsing of object numbers > 16,777,216.

core/include/fpdfapi/fpdf_parser.h

Index: core/include/fpdfapi/fpdf_parser.h
diff --git a/core/include/fpdfapi/fpdf_parser.h b/core/include/fpdfapi/fpdf_parser.h
index c57d9f20b9da8f83966b5572714373c22878763a..5903e82a1687f20976566f9cabc0e6e9ea8997fe 100644
--- a/core/include/fpdfapi/fpdf_parser.h
+++ b/core/include/fpdfapi/fpdf_parser.h
@@ -239,43 +239,33 @@ class CPDF_SyntaxParser {
   void InitParser(IFX_FileRead* pFileAccess, FX_DWORD HeaderOffset);
 
   FX_FILESIZE SavePos() const { return m_Pos; }
-
   void RestorePos(FX_FILESIZE pos) { m_Pos = pos; }
 
   CPDF_Object* GetObject(CPDF_IndirectObjectHolder* pObjList,
                          FX_DWORD objnum,
                          FX_DWORD gennum,
                          FX_BOOL bDecrypt);
-
   CPDF_Object* GetObjectByStrict(CPDF_IndirectObjectHolder* pObjList,
                                  FX_DWORD objnum,
                                  FX_DWORD gennum);
-
-  int GetDirectNum();
-
   CFX_ByteString GetKeyword();
 
   void ToNextLine();
-
   void ToNextWord();
 
   FX_BOOL SearchWord(const CFX_ByteStringC& word,
                      FX_BOOL bWholeWord,
                      FX_BOOL bForward,
                      FX_FILESIZE limit);
-
   int SearchMultiWord(const CFX_ByteStringC& words,
                       FX_BOOL bWholeWord,
                       FX_FILESIZE limit);
-
   FX_FILESIZE FindTag(const CFX_ByteStringC& tag, FX_FILESIZE limit);
 
   void SetEncrypt(std::unique_ptr<CPDF_CryptoHandler> pCryptoHandler);
 
-  FX_BOOL GetCharAt(FX_FILESIZE pos, uint8_t& ch);
-
   FX_BOOL ReadBlock(uint8_t* pBuf, FX_DWORD size);
-
+  FX_BOOL GetCharAt(FX_FILESIZE pos, uint8_t& ch);
   CFX_ByteString GetNextWord(bool* bIsNumber);
 
  protected:
@@ -318,6 +308,9 @@ class CPDF_SyntaxParser {
   std::unique_ptr<CPDF_CryptoHandler> m_pCryptoHandler;
   uint8_t m_WordBuffer[257];
   FX_DWORD m_WordSize;
+
+ private:
+  uint32_t GetDirectNum();
 };
 
 class CPDF_Parser {