[EasyUnlock] Port Connection class to native code.

components/proximity_auth/permit_message.h

+// Copyright 2014 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 COMPONENTS_PROXIMITY_AUTH_PERMIT_MESSAGE_H
+#define COMPONENTS_PROXIMITY_AUTH_PERMIT_MESSAGE_H
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+
+namespace proximity_auth {
+
+class PermitMessage {

[Tim Song, 2014/09/05 00:30:34]

WireMessage would be a better name for this class.

[Ilya Sherman, 2014/09/05 01:02:12]

Done.

+ public:
+  virtual ~PermitMessage();
+
+  // Returns |true| iff the |size| is at least equal to the message length
+  // encoded in the header of |bytes|.
+  static bool IsCompleteMessage(const char* bytes, int size);

[Tim Song, 2014/09/05 00:30:34]

Let's use a vector<uint8_t> as the shared data type for byte buffers, so we can
avoid memory and addressing issues.

[Ilya Sherman, 2014/09/05 01:02:12]

It looks like I was mistaken about how strings handle null terminators -- they
do not treat them as a special character -- so I'll use strings instead if
you're happy with that.

[Tim Song, 2014/09/05 03:10:33]

Strings are good.

+
+  // Returns the deserialized message from the first |size| bytes of |bytes|, or
+  // NULL if the message is malformed.
+  static scoped_ptr<PermitMessage> FromBytes(const char* bytes, int size);
+
+ protected:
+  // Visible for tests.
+  PermitMessage();
+
+ private:
+  // Returns the deserialized message from the first |size| bytes of |bytes|, or
+  // NULL if the message is malformed.
+  static scoped_ptr<PermitMessage> FromBytesImpl(const char* bytes, int size);
+
+  DISALLOW_COPY_AND_ASSIGN(PermitMessage);
+};
+
+}  // namespace proximity_auth
+
+#endif  // COMPONENTS_PROXIMITY_AUTH_PERMIT_MESSAGE_H