Treat null Parent as no Parent for dictionary objects
To be complient with PDF reference chapter 7.3.7
BUG=402437
R=vitalybuka@chromium.org
Review URL: https://codereview.chromium.org/469573002
diff --git a/fpdfsdk/src/fpdfppo.cpp b/fpdfsdk/src/fpdfppo.cpp
index 032c3db..b8d2125 100644
--- a/fpdfsdk/src/fpdfppo.cpp
+++ b/fpdfsdk/src/fpdfppo.cpp
@@ -215,8 +215,11 @@
{
if(pp->KeyExist((const char*)nSrctag))
return pp->GetElement((const char*)nSrctag);
- else if(pp->KeyExist("Parent"))
+ else if (pp->KeyExist("Parent"))
+ {
pp = (CPDF_Dictionary*)pp->GetElement("Parent")->GetDirect();
+ if (pp->GetType() == PDFOBJ_NULL) break;
+ }
else break;
}
