Work on RDF serialization (only (partial) saving so far).

git-svn-id: http://svn.drobilla.net/lad/ingen@146 a436a847-0d15-0410-975c-d299462d15a1

1 files changed, 77 insertions, 0 deletions

diff --git a/src/common/util/RedlandAtom.h b/src/common/util/RedlandAtom.h
new file mode 100644
index 00000000..6b5658cf
--- /dev/null
+++ b/src/common/util/RedlandAtom.h
@@ -0,0 +1,77 @@
+/* This file is part of Ingen.  Copyright (C) 2006 Dave Robillard.
+ * 
+ * Ingen 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.
+ * 
+ * Ingen 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 details.
+ * 
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef REDLAND_ATOM_H
+#define REDLAND_ATOM_H
+
+#include <redland.h>
+#include "util/Atom.h"
+
+#define U(x) ((const unsigned char*)(x))
+
+/** Support for serializing an Atom to/from RDF (via redland aka librdf).
+ *
+ * (Here to prevent a unnecessary redland dependency for Atom).
+ */
+class RedlandAtom {
+public:
+	static librdf_node* atom_to_node(librdf_world* world, const Atom& atom) {
+		char tmp_buf[32];
+
+		switch (atom.type()) {
+		//case NIL:
+			// (see below)
+			//break;
+		case Atom::INT:
+			snprintf(tmp_buf, 32, "%d", atom.get_int32());
+			return librdf_new_node_from_typed_literal(world, U(tmp_buf), NULL, librdf_new_uri(world, U("http://www.w3.org/2001/XMLSchema#integer")));
+				break;
+		case Atom::FLOAT:
+			snprintf(tmp_buf, 32, "%f", atom.get_float());
+			return librdf_new_node_from_typed_literal(world, U(tmp_buf), NULL, librdf_new_uri(world, U("http://www.w3.org/2001/XMLSchema#float")));
+			break;
+		case Atom::STRING:
+			return librdf_new_node_from_literal(world, U(atom.get_string()), NULL, 0);
+		case Atom::BLOB:
+			cerr << "WARNING: Unserializable atom!" << endl;
+			return NULL;
+		default: // This catches Atom::Type::NIL too
+			return librdf_new_node(world); // blank node
+		}
+	}
+
+	static Atom node_to_atom(librdf_node* node) {
+		/*switch (type) {
+		case 'i':
+			return Atom(arg->i);
+		case 'f':
+			return Atom(arg->f);
+		case 's':
+			return Atom(&arg->s);
+		//case 'b'
+			// FIXME: How to get a blob from a lo_arg?
+			//return Atom(arg->b);
+		default:
+			return Atom();
+		}*/
+		cerr << "FIXME: node_to_atom\n";
+		return Atom();
+	}
+
+};
+
+
+#endif // REDLAND_ATOM_H