1 files changed, 63 insertions, 0 deletions
diff --git a/mojo/public/cpp/bindings/lib/message_builder.h b/mojo/public/cpp/bindings/lib/message_builder.h
new file mode 100644
index 0000000..b4988ff9
--- /dev/null
+++ b/mojo/public/cpp/bindings/lib/message_builder.h
@@ -0,0 +1,63 @@
+// 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.
+
+#ifndef MOJO_PUBLIC_CPP_BINDINGS_LIB_MESSAGE_BUILDER_H_
+#define MOJO_PUBLIC_CPP_BINDINGS_LIB_MESSAGE_BUILDER_H_
+
+#include <stdint.h>
+
+#include "mojo/public/cpp/bindings/lib/fixed_buffer.h"
+#include "mojo/public/cpp/bindings/lib/message_internal.h"
+
+namespace mojo {
+class Message;
+
+namespace internal {
+
+class MessageBuilder {
+ public:
+  MessageBuilder(uint32_t name, size_t payload_size);
+  ~MessageBuilder();
+
+  Buffer* buffer() { return &buf_; }
+
+  // Call Finish when done making allocations in |buffer()|. Upon return,
+  // |message| will contain the message data, and |buffer()| will no longer be
+  // valid to reference.
+  void Finish(Message* message);
+
+ protected:
+  explicit MessageBuilder(size_t size);
+  FixedBuffer buf_;
+
+  MOJO_DISALLOW_COPY_AND_ASSIGN(MessageBuilder);
+};
+
+class MessageWithRequestIDBuilder : public MessageBuilder {
+ public:
+  MessageWithRequestIDBuilder(uint32_t name, size_t payload_size,
+                              uint32_t flags, uint64_t request_id);
+};
+
+class RequestMessageBuilder : public MessageWithRequestIDBuilder {
+ public:
+  RequestMessageBuilder(uint32_t name, size_t payload_size)
+      : MessageWithRequestIDBuilder(name, payload_size, kMessageExpectsResponse,
+                                    0) {
+  }
+};
+
+class ResponseMessageBuilder : public MessageWithRequestIDBuilder {
+ public:
+  ResponseMessageBuilder(uint32_t name, size_t payload_size,
+                         uint64_t request_id)
+      : MessageWithRequestIDBuilder(name, payload_size, kMessageIsResponse,
+                                    request_id) {
+  }
+};
+
+}  // namespace internal
+}  // namespace mojo
+
+#endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_MESSAGE_BUILDER_H_