1 files changed, 66 insertions, 0 deletions
diff --git a/src/engine/Updates.cpp b/src/engine/Updates.cpp
new file mode 100644
index 0000000..ce655e4
--- /dev/null
+++ b/src/engine/Updates.cpp
@@ -0,0 +1,66 @@
+/*
+  This file is part of Machina.
+  Copyright 2007-2014 David Robillard <http://drobilla.net>
+
+  Machina 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 3 of the License, or any later version.
+
+  Machina 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 Machina.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "lv2/lv2plug.in/ns/ext/atom/atom.h"
+
+#include "machina/Atom.hpp"
+#include "machina/Updates.hpp"
+#include "machina/types.hpp"
+#include "raul/RingBuffer.hpp"
+
+namespace machina {
+
+void
+write_set(SPtr<Raul::RingBuffer> buf,
+          uint64_t               subject,
+          URIInt                 key,
+          const Atom&            value)
+{
+	const uint32_t update_type = UPDATE_SET;
+	buf->write(sizeof(update_type), &update_type);
+	buf->write(sizeof(subject), &subject);
+	buf->write(sizeof(key), &key);
+
+	const LV2_Atom atom = { value.size(), value.type() };
+	buf->write(sizeof(LV2_Atom), &atom);
+	buf->write(value.size(), value.get_body());
+}
+
+uint32_t
+read_set(SPtr<Raul::RingBuffer> buf,
+         uint64_t*              subject,
+         URIInt*                key,
+         Atom*                  value)
+{
+	uint32_t update_type = 0;
+	buf->read(sizeof(update_type), &update_type);
+	if (update_type != UPDATE_SET) {
+		return 0;
+	}
+
+	buf->read(sizeof(*subject), subject);
+	buf->read(sizeof(*key), key);
+
+	LV2_Atom atom = { 0, 0 };
+	buf->read(sizeof(LV2_Atom), &atom);
+	*value = Atom(atom.size, atom.type, NULL);
+	buf->read(atom.size, value->get_body());
+
+	return sizeof(update_type) + sizeof(*subject) + sizeof(*key)
+	       + sizeof(LV2_Atom) + atom.size;
+}
+
+}