Add class QPDF_Unresolved

Allow QPDFObjectHandle::obj to be set prior resolving object.

ot_unresolved has been appended to the list object types in order to
preserve the output of existing test cases.

3 files changed, 63 insertions, 0 deletions

diff --git a/libqpdf/CMakeLists.txt b/libqpdf/CMakeLists.txt
index 51f7476d..7a4ef333 100644
--- a/libqpdf/CMakeLists.txt
+++ b/libqpdf/CMakeLists.txt
@@ -99,6 +99,7 @@ set(libqpdf_SOURCES
   QPDF_Reserved.cc
   QPDF_Stream.cc
   QPDF_String.cc
+  QPDF_Unresolved.cc
   QPDF_encryption.cc
   QPDF_json.cc
   QPDF_linearization.cc
diff --git a/libqpdf/QPDF_Unresolved.cc b/libqpdf/QPDF_Unresolved.cc
new file mode 100644
index 00000000..f348ec36
--- /dev/null
+++ b/libqpdf/QPDF_Unresolved.cc
@@ -0,0 +1,41 @@
+#include <qpdf/QPDF_Unresolved.hh>
+
+#include <stdexcept>
+
+std::shared_ptr<QPDFObject>
+QPDF_Unresolved::create()
+{
+    return do_create(new QPDF_Unresolved());
+}
+
+std::shared_ptr<QPDFObject>
+QPDF_Unresolved::shallowCopy()
+{
+    return create();
+}
+
+std::string
+QPDF_Unresolved::unparse()
+{
+    throw std::logic_error(
+        "attempted to unparse an unresolveded QPDFObjectHandle");
+    return "";
+}
+
+JSON
+QPDF_Unresolved::getJSON(int json_version)
+{
+    return JSON::makeNull();
+}
+
+QPDFObject::object_type_e
+QPDF_Unresolved::getTypeCode() const
+{
+    return QPDFObject::ot_unresolved;
+}
+
+char const*
+QPDF_Unresolved::getTypeName() const
+{
+    return "unresolved";
+}
diff --git a/libqpdf/qpdf/QPDF_Unresolved.hh b/libqpdf/qpdf/QPDF_Unresolved.hh
new file mode 100644
index 00000000..4f1c5238
--- /dev/null
+++ b/libqpdf/qpdf/QPDF_Unresolved.hh
@@ -0,0 +1,21 @@
+#ifndef QPDF_UNRESOLVED_HH
+#define QPDF_UNRESOLVED_HH
+
+#include <qpdf/QPDFObject.hh>
+
+class QPDF_Unresolved: public QPDFObject
+{
+  public:
+    virtual ~QPDF_Unresolved() = default;
+    static std::shared_ptr<QPDFObject> create();
+    virtual std::shared_ptr<QPDFObject> shallowCopy();
+    virtual std::string unparse();
+    virtual JSON getJSON(int json_version);
+    virtual QPDFObject::object_type_e getTypeCode() const;
+    virtual char const* getTypeName() const;
+
+  private:
+    QPDF_Unresolved() = default;
+};
+
+#endif // QPDF_UNRESOLVED_HH