/* * Copyright (C) 2010 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef APIClient_h #define APIClient_h #include "APIClientTraits.h" namespace WebKit { template<typename ClientInterface, int currentVersion> class APIClient { public: APIClient() { initialize(0); } void initialize(const ClientInterface* client) { COMPILE_ASSERT(sizeof(APIClientTraits<ClientInterface>::interfaceSizesByVersion) / sizeof(size_t) == currentVersion + 1, size_of_some_interfaces_are_unknown); if (client && client->version == currentVersion) { m_client = *client; return; } memset(&m_client, 0, sizeof(m_client)); if (client && client->version < currentVersion) memcpy(&m_client, client, APIClientTraits<ClientInterface>::interfaceSizesByVersion[client->version]); } protected: ClientInterface m_client; }; } // namespace WebKit #endif // APIClient_h