Redefine `Array::size()` to return 0 if the object is not an array

m-holger
1 parent 1f3f872d
Showing 2 changed files with 5 additions and 2 deletions
libqpdf/QPDF_Array.cc
libqpdf/qpdf/QPDFObjectHandle_private.hh
@@ -174,8 +174,10 @@ Array::null() const
 size_t
 Array::size() const
 {
-    auto a = array();
-    return a->sp ? a->sp->size : a->elements.size();
+    if (auto a = as<QPDF_Array>()) {
+        return a->sp ? a->sp->size : a->elements.size();
+    }
+    return 0;
 }
 std::pair<bool, QPDFObjectHandle>
@@ -86,6 +86,7 @@ namespace qpdf
         const_reverse_iterator crend();
+        // Return the number of elements in the array. Return 0 if the object is not an array.
         size_t size() const;
         std::pair<bool, QPDFObjectHandle> at(int n) const;
         bool setAt(int at, QPDFObjectHandle const& oh);