+ m_data.insert(std::make_pair(p, d));
+}
+
+void NodeMetadataList::clear()
+{
+ std::map<v3s16, NodeMetadata*>::iterator it;
+ for (it = m_data.begin(); it != m_data.end(); ++it) {
+ delete it->second;
+ }
+ m_data.clear();
+}
+
+std::string NodeMetadata::getString(const std::string &name,
+ unsigned short recursion) const
+{
+ StringMap::const_iterator it = m_stringvars.find(name);
+ if (it == m_stringvars.end())
+ return "";
+
+ return resolveString(it->second, recursion);
+}
+
+void NodeMetadata::setString(const std::string &name, const std::string &var)
+{
+ if (var.empty()) {
+ m_stringvars.erase(name);
+ } else {
+ m_stringvars[name] = var;
+ }
+}
+
+std::string NodeMetadata::resolveString(const std::string &str,
+ unsigned short recursion) const
+{
+ if (recursion > 1) {
+ return str;
+ }
+ if (str.substr(0, 2) == "${" && str[str.length() - 1] == '}') {
+ return getString(str.substr(2, str.length() - 3), recursion + 1);
+ }
+ return str;