1 files changed, 143 insertions, 0 deletions
diff --git a/src/engine/Updates.cpp b/src/engine/Updates.cpp
new file mode 100644
index 0000000..3d1c0f3
--- /dev/null
+++ b/src/engine/Updates.cpp
@@ -0,0 +1,143 @@
+/* This file is part of Machina.
+ * Copyright (C) 2010 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
+ * (at your option) 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 "raul/Atom.hpp"
+#include "raul/SharedPtr.hpp"
+
+#include "machina/types.hpp"
+#include "machina/Updates.hpp"
+
+namespace Machina {
+
+static inline void
+write_atom(SharedPtr<UpdateBuffer> buf,
+           const Raul::Atom&       value)
+{
+	const Raul::Atom::Type type = value.type();
+	buf->write(sizeof(type), &type);
+	int32_t ival;
+	float   fval;
+	size_t  szval;
+	switch (value.type()) {
+	case Raul::Atom::INT:
+		ival = value.get_int32();
+		buf->write(sizeof(ival), &ival);
+		break;
+	case Raul::Atom::FLOAT:
+		ival = value.get_float();
+		buf->write(sizeof(fval), &fval);
+		break;
+	case Raul::Atom::BOOL:
+		ival = value.get_bool() ? 1 : 0;
+		buf->write(sizeof(ival), &ival);
+		break;
+	case Raul::Atom::STRING:
+		szval = value.data_size();
+		buf->write(sizeof(size_t), &szval);
+		buf->write(value.data_size(), value.get_string());
+		break;
+	case Raul::Atom::URI:
+		szval = value.data_size();
+		buf->write(sizeof(size_t), &szval);
+		buf->write(value.data_size(), value.get_uri());
+		break;
+	default:
+		assert(false);
+	}
+}
+
+uint32_t
+read_atom(SharedPtr<UpdateBuffer> buf,
+          Raul::Atom*             value)
+{
+	Raul::Atom::Type type;
+	buf->read(sizeof(type), &type);
+
+	int32_t ival;
+	float   fval;
+	char*   sval;
+	size_t  val_size;
+	switch (type) {
+	case Raul::Atom::INT:
+		val_size = sizeof(ival);
+		buf->read(val_size, &ival);
+		*value = Raul::Atom(ival);
+		break;
+	case Raul::Atom::FLOAT:
+		val_size = sizeof(fval);
+		buf->read(val_size, &fval);
+		*value = Raul::Atom(fval);
+		break;
+	case Raul::Atom::BOOL:
+		val_size = sizeof(ival);
+		buf->read(val_size, &ival);
+		assert(ival == 0 || ival == 1);
+		*value = Raul::Atom(bool(ival));
+		break;
+	case Raul::Atom::STRING:
+		buf->read(sizeof(val_size), &val_size);
+		sval = (char*)malloc(val_size);
+		buf->read(val_size, sval);
+		val_size += sizeof(val_size);
+		*value = Raul::Atom(sval);
+		free(sval);
+		break;
+	case Raul::Atom::URI:
+		buf->read(sizeof(val_size), &val_size);
+		sval = (char*)malloc(val_size);
+		buf->read(val_size, sval);
+		val_size += sizeof(val_size);
+		*value = Raul::Atom(Raul::Atom::URI, sval);
+		free(sval);
+		break;
+	default:
+		assert(false);
+	}
+
+	return sizeof(type) + val_size;
+}
+
+void
+write_set(SharedPtr<UpdateBuffer> buf,
+          uint64_t                subject,
+          URIInt                  key,
+          const Raul::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);
+	write_atom(buf, value);
+}
+
+uint32_t
+read_set(SharedPtr<UpdateBuffer> buf,
+         uint64_t*               subject,
+         URIInt*                 key,
+         Raul::Atom*             value)
+{
+	uint32_t update_type;
+	buf->read(sizeof(update_type), &update_type);
+	assert(update_type == UPDATE_SET);
+	buf->read(sizeof(*subject), subject);
+	buf->read(sizeof(*key), key);
+
+	const uint32_t value_size = read_atom(buf, value);
+	return sizeof(update_type) + sizeof(*subject) + sizeof(*key) + value_size;
+}
+
+}