Fix build on old GCC.

[libdcp.git] / src / xml.h

diff --git a/src/xml.h b/src/xml.h
index 5cfa49477c1ab6c78b3f9cd1690b5b0a884819ab..6fec7f1bc9613515f8ee9cda2ddd4d8667506c1a 100644 (file)
--- a/src/xml.h
+++ b/src/xml.h
@@ -1,6 +1,119 @@
+/*
+    Copyright (C) 2013-2021 Carl Hetherington <cth@carlh.net>
 
-class XMLFile
+    This file is part of libdcp.
+
+    libdcp is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    libdcp is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with libdcp.  If not, see <http://www.gnu.org/licenses/>.
+
+    In addition, as a special exception, the copyright holders give
+    permission to link the code of portions of this program with the
+    OpenSSL library under certain conditions as described in each
+    individual source file, and distribute linked combinations
+    including the two.
+
+    You must obey the GNU General Public License in all respects
+    for all of the code used other than OpenSSL.  If you modify
+    file(s) with this exception, you may extend this exception to your
+    version of the file(s), but you are not obligated to do so.  If you
+    do not wish to do so, delete this exception statement from your
+    version.  If you delete this exception statement from all source
+    files in the program, then also delete it here.
+*/
+
+
+/** @file  src/xml.h
+ *  @brief Helpers for XML reading with libcxml
+ */
+
+
+#ifndef LIBDCP_XML_H
+#define LIBDCP_XML_H
+
+
+#include "exceptions.h"
+#include <libcxml/cxml.h>
+
+
+namespace dcp
 {
-public:
-       XMLFile (std::string file);
-};
+
+
+template <class T>
+std::shared_ptr<T>
+optional_type_child (cxml::Node const & node, std::string name)
+{
+       auto n = node.node_children (name);
+       if (n.size() > 1) {
+               throw XMLError ("duplicate XML tag");
+       } else if (n.empty ()) {
+               return {};
+       }
+
+       return std::make_shared<T>(n.front());
+}
+
+
+template <class T>
+std::shared_ptr<T> type_child (std::shared_ptr<const cxml::Node> node, std::string name) {
+       return std::make_shared<T>(node->node_child(name));
+}
+
+
+template <class T>
+std::shared_ptr<T>
+optional_type_child (std::shared_ptr<const cxml::Node> node, std::string name)
+{
+       return optional_type_child<T> (*node.get(), name);
+}
+
+
+template <class T>
+std::vector<std::shared_ptr<T>>
+type_children (cxml::Node const & node, std::string name)
+{
+        std::vector<std::shared_ptr<T>> r;
+       for (auto i: node.node_children(name)) {
+               r.push_back (std::make_shared<T>(i));
+       }
+       return r;
+}
+
+
+template <class T>
+std::vector<std::shared_ptr<T>>
+type_children (std::shared_ptr<const cxml::Node> node, std::string name)
+{
+       return type_children<T> (*node.get(), name);
+}
+
+
+template <class T>
+std::vector<std::shared_ptr<T>>
+type_grand_children (cxml::Node const & node, std::string name, std::string sub)
+{
+       return type_children<T> (node.node_child(name), sub);
+}
+
+
+template <class T>
+std::vector<std::shared_ptr<T>>
+type_grand_children (std::shared_ptr<const cxml::Node> node, std::string name, std::string sub)
+{
+       return type_grand_children<T> (*node.get(), name, sub);
+}
+
+}
+
+
+#endif