/* * Copyright (C) 2014 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 TypeCastsCF_h #define TypeCastsCF_h #include <CoreFoundation/CoreFoundation.h> #include <wtf/Assertions.h> namespace WTF { template <typename> struct CFTypeTrait; #define DECLARE_CF_TYPE_TRAIT(ClassName) \ template <> \ struct CFTypeTrait<ClassName##Ref> { \ static inline CFTypeID typeID() { return ClassName##GetTypeID(); } \ }; DECLARE_CF_TYPE_TRAIT(CFArray); DECLARE_CF_TYPE_TRAIT(CFBoolean); DECLARE_CF_TYPE_TRAIT(CFData); DECLARE_CF_TYPE_TRAIT(CFDictionary); DECLARE_CF_TYPE_TRAIT(CFNumber); DECLARE_CF_TYPE_TRAIT(CFString); #undef DECLARE_CF_TYPE_TRAIT template<typename T> T dynamic_cf_cast(CFTypeRef object) { if (!object) return nullptr; if (CFGetTypeID(object) != CFTypeTrait<T>::typeID()) return nullptr; return static_cast<T>(object); } template<typename T> T checked_cf_cast(CFTypeRef object) { auto result = dynamic_cf_cast<T>(object); ASSERT_WITH_SECURITY_IMPLICATION(result); return result; } } // namespace WTF using WTF::checked_cf_cast; using WTF::dynamic_cf_cast; #endif // TypeCastsCF_h