mojo: MessageBuilder

mojo/public/libs/message/message_builder.h

Index: mojo/public/libs/message/message_builder.h
diff --git a/mojo/public/libs/message/message_builder.h b/mojo/public/libs/message/message_builder.h
new file mode 100644
index 0000000000000000000000000000000000000000..671499b747a59b49dd07a971778b331e370c15ba
--- /dev/null
+++ b/mojo/public/libs/message/message_builder.h
@@ -0,0 +1,70 @@
+// 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_LIBS_MESSAGE_MESSAGE_BUIDER_H_
+#define MOJO_PUBLIC_LIBS_MESSAGE_MESSAGE_BUIDER_H_
+
+#include <stdint.h>
+
+#include <string>
+#include <vector>
+
+#include "mojo/public/libs/message/message.h"
+
+namespace mojo {
+
+class MessageBuilder {
+ public:
+  MessageBuilder();
+  ~MessageBuilder();
+
+  bool Initialize(uint32_t message_name);
+
+  bool Append(uint16_t name, bool value);
+
+  bool Append(uint16_t name, int8_t value);
+  bool Append(uint16_t name, int16_t value);
+  bool Append(uint16_t name, int32_t value);
+  bool Append(uint16_t name, int64_t value);
+
+  bool Append(uint16_t name, uint8_t value);
+  bool Append(uint16_t name, uint16_t value);
+  bool Append(uint16_t name, uint32_t value);
+  bool Append(uint16_t name, uint64_t value);
+
+  bool Append(uint16_t name, float value);
+  bool Append(uint16_t name, double value);
+
+  bool Append(uint16_t name, const std::string& value);
+  bool Append(uint16_t name, const void* bytes, size_t num_bytes);
+
+  template <typename C>
+  bool Append(uint16_t name, const C& container) {
+    return Append(name, container.data(), container.size());
+  }
+
+  // TODO(darin): Add support for arrays of other types.
+
+  bool Append(uint16_t name, Handle handle);
+  bool Append(uint16_t name, const Message& message);
+
+  bool Finish(Message* message);
+
+ private:
+  bool AppendU32(uint16_t name, MessageFieldType field_type, uint32_t value);
+  bool AppendU64(uint16_t name, MessageFieldType field_type, uint64_t value);
+  bool AppendArray(uint16_t name, MessageFieldType field_type,
+                   const void* bytes, size_t num_bytes);
+
+  bool AppendHeader(uint16_t name, MessageFieldType field_type);
+  bool AppendPadding(size_t num_bytes);
+  bool AppendRawBytes(const void* bytes, size_t num_bytes);
+
+  std::vector<uint8_t> data_;
+  std::vector<Handle> handles_;
+};
+
+}  // namespace mojo
+
+#endif  // MOJO_PUBLIC_LIBS_MESSAGE_BUILDER_H_