Clean up circular references in QPDF_Stream

Jay Berkenbilt
1 parent c16aa1ac
Showing 3 changed files with 11 additions and 0 deletions
include/qpdf/QPDFObjectHandle.hh
libqpdf/QPDF_Stream.cc
libqpdf/qpdf/QPDF_Stream.hh
@@ -597,6 +597,7 @@ class QPDFObjectHandle
     {
 	friend class QPDF_Dictionary;
 	friend class QPDF_Array;
+        friend class QPDF_Stream;
       private:
 	static void releaseResolved(QPDFObjectHandle& o)
 	{
@@ -45,6 +45,13 @@ QPDF_Stream::~QPDF_Stream()
 }
 void
+QPDF_Stream::releaseResolved()
+{
+    this->stream_provider = 0;
+    QPDFObjectHandle::ReleaseResolver::releaseResolved(this->stream_dict);
+}
+
+void
 QPDF_Stream::setObjGen(int objid, int generation)
 {
     if (! ((this->objid == 0) && (this->generation == 0)))
@@ -43,6 +43,9 @@ class QPDF_Stream: public QPDFObject
     // when adding streams to files.
     void setObjGen(int objid, int generation);
+  protected:
+    virtual void releaseResolved();
+
   private:
     static std::map<std::string, std::string> filter_abbreviations;