SharedBufferCopy.cpp   [plain text]


/*
 * Copyright (C) 2018-2020 Apple Inc. All rights reserved.
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 *
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 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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#include "config.h"
#include "SharedBufferCopy.h"

#include "ArgumentCoders.h"
#include "DataReference.h"
#include "Decoder.h"
#include "Encoder.h"

namespace IPC {

using namespace WebCore;

void SharedBufferCopy::encode(Encoder& encoder) const
{
    uint64_t bufferSize = m_buffer ? m_buffer->size() : 0;
    encoder.reserve(sizeof(bufferSize) + bufferSize);
    encoder << bufferSize;
    if (!bufferSize)
        return;
    for (auto& segment : *m_buffer)
        encoder.encodeFixedLengthData(reinterpret_cast<const uint8_t*>(segment.segment->data()), segment.segment->size(), 1);
}

Optional<SharedBufferCopy> SharedBufferCopy::decode(Decoder& decoder)
{
    IPC::DataReference data;
    if (!decoder.decode(data))
        return WTF::nullopt;
    RefPtr<SharedBuffer> buffer;
    if (data.size())
        buffer = SharedBuffer::create(data.data(), data.size());
    return { WTFMove(buffer) };
}

} // namespace IPC