C++ bindings

mojo/public/bindings/lib/message_builder.cc

Index: mojo/public/bindings/lib/message_builder.cc
diff --git a/mojo/public/bindings/lib/message_builder.cc b/mojo/public/bindings/lib/message_builder.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5d4c23fa867d56a96258bad489b9e8523b663eda
--- /dev/null
+++ b/mojo/public/bindings/lib/message_builder.cc
@@ -0,0 +1,27 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "mojo/public/bindings/lib/message_builder.h"
+
+#include "mojo/public/bindings/lib/message.h"
+
+namespace mojo {
+
+MessageBuilder::MessageBuilder() {
+  // Reserve space for the message header.
+  buf_.Allocate(sizeof(MessageHeader));
+}
+
+MessageBuilder::~MessageBuilder() {
+}
+
+MessageData* MessageBuilder::Finish(uint32_t message_name) {
+  size_t num_bytes = buf_.size();
+  MessageData* data = static_cast<MessageData*>(buf_.Leak());
+  data->header.num_bytes = static_cast<uint32_t>(num_bytes);
+  data->header.name = message_name;
+  return data;
+}
+
+}  // namespace mojo