93 lines
3.2 KiB
C++
93 lines
3.2 KiB
C++
/*
|
|
* Copyright (C) 2014-2018 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.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <CoreFoundation/CoreFoundation.h>
|
|
#include <wtf/Assertions.h>
|
|
|
|
#ifndef CF_BRIDGED_TYPE
|
|
#define CF_BRIDGED_TYPE(T)
|
|
#endif
|
|
|
|
namespace WTF {
|
|
|
|
template <typename> struct CFTypeTrait;
|
|
|
|
#define WTF_DECLARE_CF_TYPE_TRAIT(ClassName) \
|
|
template <> \
|
|
struct WTF::CFTypeTrait<ClassName##Ref> { \
|
|
static inline CFTypeID typeID(void) { return ClassName##GetTypeID(); } \
|
|
};
|
|
|
|
WTF_DECLARE_CF_TYPE_TRAIT(CFArray);
|
|
WTF_DECLARE_CF_TYPE_TRAIT(CFBoolean);
|
|
WTF_DECLARE_CF_TYPE_TRAIT(CFData);
|
|
WTF_DECLARE_CF_TYPE_TRAIT(CFDictionary);
|
|
WTF_DECLARE_CF_TYPE_TRAIT(CFNumber);
|
|
WTF_DECLARE_CF_TYPE_TRAIT(CFString);
|
|
|
|
#define WTF_DECLARE_CF_MUTABLE_TYPE_TRAIT(ClassName, MutableClassName) \
|
|
template <> \
|
|
struct WTF::CFTypeTrait<MutableClassName##Ref> { \
|
|
static inline CFTypeID typeID(void) { return ClassName##GetTypeID(); } \
|
|
};
|
|
|
|
WTF_DECLARE_CF_MUTABLE_TYPE_TRAIT(CFArray, CFMutableArray);
|
|
WTF_DECLARE_CF_MUTABLE_TYPE_TRAIT(CFData, CFMutableData);
|
|
WTF_DECLARE_CF_MUTABLE_TYPE_TRAIT(CFDictionary, CFMutableDictionary);
|
|
WTF_DECLARE_CF_MUTABLE_TYPE_TRAIT(CFString, CFMutableString);
|
|
|
|
#undef WTF_DECLARE_CF_MUTABLE_TYPE_TRAIT
|
|
|
|
// Use this instead of checked_cf_cast<> when actively checking CF types,
|
|
// similar to dynamic_cast<> in C++. Be sure to include a nullptr check.
|
|
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>(const_cast<CF_BRIDGED_TYPE(id) void*>(object));
|
|
}
|
|
|
|
// Use this instead of dynamic_cf_cast<> when a specifc CF type is required.
|
|
template<typename T> T checked_cf_cast(CFTypeRef object)
|
|
{
|
|
if (!object)
|
|
return nullptr;
|
|
|
|
RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(CFGetTypeID(object) == CFTypeTrait<T>::typeID());
|
|
|
|
return static_cast<T>(const_cast<CF_BRIDGED_TYPE(id) void*>(object));
|
|
}
|
|
|
|
} // namespace WTF
|
|
|
|
using WTF::checked_cf_cast;
|
|
using WTF::dynamic_cf_cast;
|