Convenience functions to_hex(memory_cptr), find_and_clone_binary<>()

src/common/ebml.h

@@ -203,6 +203,21 @@ GetFirstOrNextChild(EbmlMaster *master,
   return nullptr == previous_child ? GetChild<A>(*master) : GetNextChild<A>(*master, *previous_child);
 }
 
+template<typename T>
+memory_cptr
+find_and_clone_binary(EbmlElement &parent) {
+  auto child = FindChild<T>(static_cast<EbmlMaster &>(parent));
+  if (child)
+    return memory_c::clone(child->GetBuffer(), child->GetSize());
+  return memory_cptr{};
+}
+
+template<typename T>
+memory_cptr
+find_and_clone_binary(EbmlElement *parent) {
+  return find_and_clone_binary<T>(*parent);
+}
+
 EbmlElement *empty_ebml_master(EbmlElement *e);
 EbmlElement *create_ebml_element(const EbmlCallbacks &callbacks, const EbmlId &id);
 EbmlMaster *sort_ebml_master(EbmlMaster *e);

src/common/strings/formatting.h

@@ -64,6 +64,11 @@ to_hex(const std::string &buf,
        bool compact = false) {
   return to_hex(reinterpret_cast<const unsigned char *>(buf.c_str()), buf.length(), compact);
 }
+inline std::string
+to_hex(memory_cptr const &buf,
+       bool compact = false) {
+  return to_hex(buf->get_buffer(), buf->get_size(), compact);
+}
 
 std::string create_minutes_seconds_time_string(unsigned int seconds, bool omit_minutes_if_zero = false);