Fix infinite recursion in CPDF_Parser::ParseIndirectObjectAt().
[pdfium.git] / core / include / fpdfapi / fpdf_parser.h
index d2fdad4..e1a0f5c 100644 (file)
@@ -261,10 +261,10 @@ public:
         m_Pos = pos;
     }
 
-    CPDF_Object*               GetObject(CPDF_IndirectObjects* pObjList, FX_DWORD objnum, FX_DWORD gennum, int level, struct PARSE_CONTEXT* pContext = NULL, FX_BOOL bDecrypt = TRUE);
+    CPDF_Object*               GetObject(CPDF_IndirectObjects* pObjList, FX_DWORD objnum, FX_DWORD gennum, struct PARSE_CONTEXT* pContext = NULL, FX_BOOL bDecrypt = TRUE);
 
 
-    CPDF_Object*               GetObjectByStrict(CPDF_IndirectObjects* pObjList, FX_DWORD objnum, FX_DWORD gennum, int level, struct PARSE_CONTEXT* pContext = NULL);
+    CPDF_Object*               GetObjectByStrict(CPDF_IndirectObjects* pObjList, FX_DWORD objnum, FX_DWORD gennum, struct PARSE_CONTEXT* pContext = NULL);
 
     int                                        GetDirectNum();
 
@@ -302,6 +302,8 @@ public:
 
     CFX_ByteString             GetNextWord(FX_BOOL& bIsNumber);
 protected:
+    static const int kParserMaxRecursionDepth = 64;
+    static int s_CurrentRecursionDepth;
 
     virtual FX_BOOL                            GetNextChar(FX_BYTE& ch);
 
@@ -520,7 +522,6 @@ public:
         return m_dwFirstPageNo;
     }
 protected:
-
     CPDF_Document*             m_pDocument;
 
     CPDF_SyntaxParser  m_Syntax;
@@ -869,21 +870,25 @@ public:
 class IPDF_DataAvail
 {
 public:
+    static IPDF_DataAvail* Create(IFX_FileAvail* pFileAvail, IFX_FileRead* pFileRead);
     virtual ~IPDF_DataAvail() { }
 
-    virtual FX_BOOL                    IsDocAvail(IFX_DownloadHints* pHints) = 0;
+    IFX_FileAvail* GetFileAvail() const { return m_pFileAvail; }
+    IFX_FileRead* GetFileRead() const { return m_pFileRead; }
 
+    virtual FX_BOOL                    IsDocAvail(IFX_DownloadHints* pHints) = 0;
     virtual void                       SetDocument(CPDF_Document* pDoc) = 0;
-
     virtual FX_BOOL                    IsPageAvail(int iPage, IFX_DownloadHints* pHints) = 0;
-
     virtual FX_BOOL                    IsLinearized() = 0;
-
     virtual FX_INT32           IsFormAvail(IFX_DownloadHints *pHints) = 0;
-
     virtual FX_INT32           IsLinearizedPDF() = 0;
-
     virtual void                               GetLinearizedMainXRefInfo(FX_FILESIZE *pPos, FX_DWORD *pSize) = 0;
+
+protected:
+    IPDF_DataAvail(IFX_FileAvail* pFileAvail, IFX_FileRead* pFileRead);
+
+    IFX_FileAvail* m_pFileAvail;
+    IFX_FileRead* m_pFileRead;
 };
 class CPDF_SortObjNumArray : public CFX_Object
 {
@@ -942,203 +947,4 @@ enum PDF_DATAAVAIL_STATUS {
     PDF_DATAAVAIL_LOADALLFILE,
     PDF_DATAAVAIL_TRAILER_APPEND
 };
-class CPDF_DataAvail FX_FINAL : public CFX_Object, public IPDF_DataAvail
-{
-public:
-
-    CPDF_DataAvail(IFX_FileAvail* pFileAvail, IFX_FileRead* pFileRead);
-    ~CPDF_DataAvail();
-
-    virtual FX_BOOL                     IsDocAvail(IFX_DownloadHints* pHints)  FX_OVERRIDE;
-
-    virtual void                        SetDocument(CPDF_Document* pDoc)  FX_OVERRIDE;
-
-    virtual FX_BOOL                     IsPageAvail(int iPage, IFX_DownloadHints* pHints)  FX_OVERRIDE;
-
-    virtual FX_INT32                    IsFormAvail(IFX_DownloadHints *pHints)  FX_OVERRIDE;
-
-    virtual FX_INT32                    IsLinearizedPDF()  FX_OVERRIDE;
-
-    virtual FX_BOOL                     IsLinearized()  FX_OVERRIDE
-    {
-        return m_bLinearized;
-    }
-
-    virtual void                        GetLinearizedMainXRefInfo(FX_FILESIZE *pPos, FX_DWORD *pSize)  FX_OVERRIDE;
-    IFX_FileRead*                       GetFileRead() const
-    {
-        return m_pFileRead;
-    }
-    IFX_FileAvail*                      GetFileAvail() const
-    {
-        return m_pFileAvail;
-    }
-protected:
-    FX_DWORD                            GetObjectSize(FX_DWORD objnum, FX_FILESIZE& offset);
-    FX_BOOL                             IsObjectsAvail(CFX_PtrArray& obj_array, FX_BOOL bParsePage, IFX_DownloadHints* pHints, CFX_PtrArray &ret_array);
-    FX_BOOL                             CheckDocStatus(IFX_DownloadHints *pHints);
-    FX_BOOL                             CheckHeader(IFX_DownloadHints* pHints);
-    FX_BOOL                             CheckFirstPage(IFX_DownloadHints *pHints);
-    FX_BOOL                             CheckEnd(IFX_DownloadHints *pHints);
-    FX_BOOL                             CheckCrossRef(IFX_DownloadHints* pHints);
-    FX_BOOL                             CheckCrossRefItem(IFX_DownloadHints *pHints);
-    FX_BOOL                             CheckTrailer(IFX_DownloadHints* pHints);
-    FX_BOOL                             CheckRoot(IFX_DownloadHints* pHints);
-    FX_BOOL                             CheckInfo(IFX_DownloadHints* pHints);
-    FX_BOOL                             CheckPages(IFX_DownloadHints* pHints);
-    FX_BOOL                             CheckPage(IFX_DownloadHints* pHints);
-    FX_BOOL                             CheckResources(IFX_DownloadHints* pHints);
-    FX_BOOL                             CheckAnnots(IFX_DownloadHints* pHints);
-    FX_BOOL                             CheckAcroForm(IFX_DownloadHints* pHints);
-    FX_BOOL                             CheckAcroFormSubObject(IFX_DownloadHints* pHints);
-    FX_BOOL                             CheckTrailerAppend(IFX_DownloadHints* pHints);
-    FX_BOOL                             CheckPageStatus(IFX_DownloadHints* pHints);
-    FX_BOOL                             CheckAllCrossRefStream(IFX_DownloadHints *pHints);
-
-    FX_DWORD                            CheckCrossRefStream(IFX_DownloadHints *pHints, FX_FILESIZE &xref_offset);
-    FX_BOOL                             IsLinearizedFile(FX_LPBYTE pData, FX_DWORD dwLen);
-    void                                SetStartOffset(FX_FILESIZE dwOffset);
-    FX_BOOL                             GetNextToken(CFX_ByteString &token);
-    FX_BOOL                             GetNextChar(FX_BYTE &ch);
-    CPDF_Object        *                       ParseIndirectObjectAt(FX_FILESIZE pos, FX_DWORD objnum);
-    CPDF_Object        *                       GetObject(FX_DWORD objnum, IFX_DownloadHints* pHints, FX_BOOL *pExistInFile);
-    FX_BOOL                             GetPageKids(CPDF_Parser *pParser, CPDF_Object *pPages);
-    FX_BOOL                             PreparePageItem();
-    FX_BOOL                             LoadPages(IFX_DownloadHints* pHints);
-    FX_BOOL                             LoadAllXref(IFX_DownloadHints* pHints);
-    FX_BOOL                             LoadAllFile(IFX_DownloadHints* pHints);
-    FX_BOOL                             CheckLinearizedData(IFX_DownloadHints* pHints);
-    FX_BOOL                             CheckFileResources(IFX_DownloadHints* pHints);
-    FX_BOOL                             CheckPageAnnots(int iPage, IFX_DownloadHints* pHints);
-
-    FX_BOOL                             CheckLinearizedFirstPage(int iPage, IFX_DownloadHints* pHints);
-    FX_BOOL                             HaveResourceAncestor(CPDF_Dictionary *pDict);
-    FX_BOOL                             CheckPage(FX_INT32 iPage, IFX_DownloadHints* pHints);
-    FX_BOOL                             LoadDocPages(IFX_DownloadHints* pHints);
-    FX_BOOL                             LoadDocPage(FX_INT32 iPage, IFX_DownloadHints* pHints);
-    FX_BOOL                             CheckPageNode(CPDF_PageNode &pageNodes, FX_INT32 iPage, FX_INT32 &iCount, IFX_DownloadHints* pHints);
-    FX_BOOL                             CheckUnkownPageNode(FX_DWORD dwPageNo, CPDF_PageNode *pPageNode, IFX_DownloadHints* pHints);
-    FX_BOOL                             CheckArrayPageNode(FX_DWORD dwPageNo, CPDF_PageNode *pPageNode, IFX_DownloadHints* pHints);
-    FX_BOOL                             CheckPageCount(IFX_DownloadHints* pHints);
-    FX_BOOL                             IsFirstCheck(int iPage);
-    void                                ResetFirstCheck(int iPage);
-
-    CPDF_Parser                         m_parser;
-
-    CPDF_SyntaxParser                   m_syntaxParser;
-
-    CPDF_Object                         *m_pRoot;
-
-    FX_DWORD                            m_dwRootObjNum;
-
-    FX_DWORD                            m_dwInfoObjNum;
-
-    CPDF_Object                         *m_pLinearized;
-
-    CPDF_Object                         *m_pTrailer;
-
-    FX_BOOL                             m_bDocAvail;
-
-    FX_FILESIZE                         m_dwHeaderOffset;
-
-    FX_FILESIZE                         m_dwLastXRefOffset;
-
-    FX_FILESIZE                         m_dwXRefOffset;
-
-    FX_FILESIZE                         m_dwTrailerOffset;
-
-    FX_FILESIZE                         m_dwCurrentOffset;
-
-    PDF_DATAAVAIL_STATUS                m_docStatus;
-
-    IFX_FileAvail*                      m_pFileAvail;
-
-    IFX_FileRead*                       m_pFileRead;
-
-    FX_FILESIZE                                m_dwFileLen;
-
-    CPDF_Document*                      m_pDocument;
-
-    CPDF_SortObjNumArray                m_objnum_array;
-
-    CFX_PtrArray                        m_objs_array;
-
-    FX_FILESIZE                                m_Pos;
-
-    FX_FILESIZE                         m_bufferOffset;
-
-    FX_DWORD                            m_bufferSize;
-
-    CFX_ByteString                      m_WordBuf;
-
-    FX_BYTE                             m_WordBuffer[257];
-
-    FX_DWORD                            m_WordSize;
-
-    FX_BYTE                             m_bufferData[512];
-
-    CFX_FileSizeArray                   m_CrossOffset;
-
-    CFX_DWordArray                      m_XRefStreamList;
-
-    CFX_DWordArray                      m_PageObjList;
-
-    FX_DWORD                            m_PagesObjNum;
-
-    FX_BOOL                             m_bLinearized;
-
-    FX_DWORD                            m_dwFirstPageNo;
-
-    FX_BOOL                             m_bLinearedDataOK;
-
-    FX_BOOL                             m_bMainXRefLoadTried;
-
-    FX_BOOL                             m_bMainXRefLoadedOK;
-
-    FX_BOOL                             m_bPagesTreeLoad;
-
-    FX_BOOL                             m_bPagesLoad;
-
-    CPDF_Parser *                       m_pCurrentParser;
-
-    FX_FILESIZE                         m_dwCurrentXRefSteam;
-
-    FX_BOOL                             m_bAnnotsLoad;
-
-    FX_BOOL                             m_bHaveAcroForm;
-
-    FX_DWORD                            m_dwAcroFormObjNum;
-
-    FX_BOOL                             m_bAcroFormLoad;
-
-    CPDF_Object        *                       m_pAcroForm;
-
-    CFX_PtrArray                        m_arrayAcroforms;
-
-    CPDF_Dictionary *                   m_pPageDict;
-
-    CPDF_Object *                       m_pPageResource;
-
-    FX_BOOL                             m_bNeedDownLoadResource;
-
-    FX_BOOL                             m_bPageLoadedOK;
-
-    FX_BOOL                             m_bLinearizedFormParamLoad;
-
-    CFX_PtrArray                        m_PagesArray;
-
-    FX_DWORD                            m_dwEncryptObjNum;
-
-    FX_FILESIZE                         m_dwPrevXRefOffset;
-
-    FX_BOOL                             m_bTotalLoadPageTree;
-
-    FX_BOOL                             m_bCurPageDictLoadOK;
-
-    CPDF_PageNode                       m_pageNodes;
-
-    CFX_CMapDWordToDWord *              m_pageMapCheckState;
-
-    CFX_CMapDWordToDWord *              m_pagesLoadState;
-};
 #endif