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/*
* Copyright (C) 2024 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 THE COPYRIGHT HOLDER "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 THE COPYRIGHT HOLDER 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
#if !LOG_DISABLED
#include <wtf/PointerComparison.h>
#include <wtf/text/TextStream.h>
namespace WebCore {
#define LOG_IF_DIFFERENT(name) \
do { logIfDifferent(ts, ASCIILiteral::fromLiteralUnsafe(#name), name, other.name); } while (0)
#define LOG_IF_DIFFERENT_WITH_CAST(type, name) \
do { logIfDifferent(ts, ASCIILiteral::fromLiteralUnsafe(#name), static_cast<type>(name), static_cast<type>(other.name)); } while (0)
#define LOG_RAW_OPTIONSET_IF_DIFFERENT(type, name) \
do { logIfDifferent(ts, ASCIILiteral::fromLiteralUnsafe(#name), OptionSet<type>::fromRaw(name), OptionSet<type>::fromRaw(other.name)); } while (0)
template<class T>
struct is_pointer_wrapper : std::false_type { };
template<class T>
struct is_pointer_wrapper<RefPtr<T>> : std::true_type { };
template<class T>
struct is_pointer_wrapper<Ref<T>> : std::true_type { };
template<class T>
struct is_pointer_wrapper<std::unique_ptr<T>> : std::true_type { };
template<typename T>
struct ValueOrUnstreamableMessage {
explicit ValueOrUnstreamableMessage(const T& value)
: value(value)
{ }
const T& value;
};
template<typename T>
TextStream& operator<<(TextStream& ts, ValueOrUnstreamableMessage<T> item)
{
if constexpr (WTF::supports_text_stream_insertion<T>::value) {
if constexpr (is_pointer_wrapper<T>::value)
ts << ValueOrNull(item.value.get());
else
ts << item.value;
} else
ts << "(unstreamable)";
return ts;
}
template<typename T>
void logIfDifferent(TextStream& ts, ASCIILiteral name, const T& item1, const T& item2)
{
bool differ = false;
if constexpr (is_pointer_wrapper<T>::value)
differ = !arePointingToEqualData(item1, item2);
else
differ = item1 != item2;
if (differ)
ts << name << " differs: " << ValueOrUnstreamableMessage(item1) << ", " << ValueOrUnstreamableMessage(item2) << '\n';
}
} // namespace WebCore
#endif // !LOG_DISABLED
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