Various tweaks for a real-life DCP.

[libdcp.git] / src / xml.cc

diff --git a/src/xml.cc b/src/xml.cc
index 4ab6a2e7bcd5460009447ff83b5b31ed76b2422a..72dfe1bbcf0472acb3687730708965be89767e2a 100644 (file)
--- a/src/xml.cc
+++ b/src/xml.cc
@@ -107,6 +107,27 @@ XMLNode::int64_node (string name)
        return lexical_cast<int64_t> (string_node (name));
 }
 
+int64_t
+XMLNode::optional_int64_node (string name)
+{
+       list<xmlpp::Node*> nodes = xml_nodes (name);
+       if (nodes.size() > 2) {
+               throw XMLError ("duplicate XML tag " + name);
+       }
+
+       if (nodes.empty ()) {
+               return 0;
+       }
+
+       return int64_node (name);
+}
+
+float
+XMLNode::float_node (string name)
+{
+       return lexical_cast<float> (string_node (name));
+}
+
 void
 XMLNode::ignore_node (string name)
 {