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/*
* Copyright (C) 2018 Sony Interactive Entertainment Inc.
*
* 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.
*/
#include "config.h"
#include "NetworkCacheData.h"
#include "SharedMemory.h"
namespace WebKit {
namespace NetworkCache {
Data::Data(const uint8_t* data, size_t size)
: m_buffer(Box<std::variant<Vector<uint8_t>, FileSystem::MappedFileData>>::create(Vector<uint8_t>(size)))
, m_size(size)
{
memcpy(std::get<Vector<uint8_t>>(*m_buffer).data(), data, size);
}
Data::Data(std::variant<Vector<uint8_t>, FileSystem::MappedFileData>&& data)
: m_buffer(Box<std::variant<Vector<uint8_t>, FileSystem::MappedFileData>>::create(WTFMove(data)))
, m_isMap(std::holds_alternative<FileSystem::MappedFileData>(*m_buffer))
{
m_size = WTF::switchOn(*m_buffer,
[](const Vector<uint8_t>& buffer) -> size_t { return buffer.size(); },
[](const FileSystem::MappedFileData& mappedFile) -> size_t { return mappedFile.size(); }
);
}
Data Data::empty()
{
Vector<uint8_t> buffer;
return { WTFMove(buffer) };
}
const uint8_t* Data::data() const
{
if (!m_buffer)
return nullptr;
return WTF::switchOn(*m_buffer,
[](const Vector<uint8_t>& buffer) -> const uint8_t* { return buffer.data(); },
[](const FileSystem::MappedFileData& mappedFile) -> const uint8_t* { return static_cast<const uint8_t*>(mappedFile.data()); }
);
}
bool Data::isNull() const
{
return !m_buffer;
}
bool Data::apply(const Function<bool(std::span<const uint8_t>)>& applier) const
{
if (isEmpty())
return false;
return applier({ data(), size() });
}
Data Data::subrange(size_t offset, size_t size) const
{
if (!m_buffer)
return { };
return { data() + offset, size };
}
Data concatenate(const Data& a, const Data& b)
{
if (a.isNull())
return b;
if (b.isNull())
return a;
Vector<uint8_t> buffer(a.size() + b.size());
memcpy(buffer.data(), a.data(), a.size());
memcpy(buffer.data() + a.size(), b.data(), b.size());
return Data(WTFMove(buffer));
}
Data Data::adoptMap(FileSystem::MappedFileData&& mappedFile, FileSystem::PlatformFileHandle fd)
{
ASSERT(mappedFile.data());
FileSystem::closeFile(fd);
return { WTFMove(mappedFile) };
}
#if ENABLE(SHAREABLE_RESOURCE) && OS(WINDOWS)
RefPtr<SharedMemory> Data::tryCreateSharedMemory() const
{
if (isNull() || !isMap())
return nullptr;
auto newHandle = Win32Handle { std::get<FileSystem::MappedFileData>(*m_buffer).fileMapping() };
if (!newHandle)
return nullptr;
return SharedMemory::map({ WTFMove(newHandle), m_size }, SharedMemory::Protection::ReadOnly);
}
#endif
} // namespace NetworkCache
} // namespace WebKit
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