Moved generic utility stuff to new library "raul".

git-svn-id: http://svn.drobilla.net/lad/raul@156 a436a847-0d15-0410-975c-d299462d15a1

1 files changed, 93 insertions, 0 deletions

diff --git a/raul/AtomRaptor.h b/raul/AtomRaptor.h
new file mode 100644
index 0000000..b06286d
--- /dev/null
+++ b/raul/AtomRaptor.h
@@ -0,0 +1,93 @@
+/* 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 RAUL_ATOM_RAPTOR_H
+#define RAUL_ATOM_RAPTOR_H
+
+#include <sstream>
+#include <cstring>
+#include <raptor.h>
+#include "raul/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 AtomRaptor {
+public:
+	/** Set this atom's value to the object (value) portion of an RDF triple.
+	 *
+	 * Caller is responsible for calling free(triple->object).
+	 */
+	static void atom_to_triple_object(raptor_statement* triple, const Atom& atom) {
+		std::ostringstream os;
+
+		triple->object_literal_language = NULL;
+
+		switch (atom.type()) {
+		case Atom::INT:
+			os << atom.get_int32();
+			triple->object = (unsigned char*)strdup(os.str().c_str());
+			triple->object_type = RAPTOR_IDENTIFIER_TYPE_LITERAL;
+			triple->object_literal_datatype = raptor_new_uri(
+				U("http://www.w3.org/2001/XMLSchema#integer"));
+			break;
+		case Atom::FLOAT:
+			os << atom.get_float();
+			triple->object = (unsigned char*)strdup(os.str().c_str());
+			triple->object_type = RAPTOR_IDENTIFIER_TYPE_LITERAL;
+			triple->object_literal_datatype = raptor_new_uri(
+				U("http://www.w3.org/2001/XMLSchema#float"));
+			break;
+		case Atom::STRING:
+			triple->object = strdup(atom.get_string());
+			triple->object_type = RAPTOR_IDENTIFIER_TYPE_LITERAL;
+			break;
+		case Atom::BLOB:
+		case Atom::NIL:
+		default:
+			cerr << "WARNING: Unserializable Atom!" << endl;
+			triple->object = NULL;
+			triple->object_type = RAPTOR_IDENTIFIER_TYPE_UNKNOWN;
+		}
+	}
+
+#if 0
+	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
+
+};
+
+
+#endif // RAUL_ATOM_RAPTOR_H