/* * Copyright (C) 2018-2020 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. */ // Encodes a SharedBuffer that is received as a copy of the decoded data in a new SharedBuffer. // To avoid copying from the Decoder, use SharedBufferDataReference to receive a DataReference instead. #pragma once #include <WebCore/SharedBuffer.h> namespace IPC { class Decoder; class Encoder; class SharedBufferCopy { public: SharedBufferCopy() = default; SharedBufferCopy(RefPtr<WebCore::SharedBuffer>&& buffer) : m_buffer(WTFMove(buffer)) { } SharedBufferCopy(Ref<WebCore::SharedBuffer>&& buffer) : m_buffer(WTFMove(buffer)) { } SharedBufferCopy(const WebCore::SharedBuffer& buffer) : m_buffer(WebCore::SharedBuffer::create()) { m_buffer->append(buffer); } RefPtr<WebCore::SharedBuffer>& buffer() { return m_buffer; } const RefPtr<WebCore::SharedBuffer>& buffer() const { return m_buffer; } const char* data() const { return m_buffer ? m_buffer->data() : nullptr; } size_t size() const { return m_buffer ? m_buffer->size() : 0; } bool isEmpty() const { return m_buffer ? m_buffer->isEmpty() : true; } void encode(Encoder&) const; static WARN_UNUSED_RETURN Optional<SharedBufferCopy> decode(Decoder&); private: RefPtr<WebCore::SharedBuffer> m_buffer; }; } // namespace IPC