| /* |
| * Copyright (C) 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. |
| */ |
| |
| #include "config.h" |
| #include "SerializedNFA.h" |
| |
| #include "NFA.h" |
| |
| #if ENABLE(CONTENT_EXTENSIONS) |
| |
| namespace WebCore { |
| namespace ContentExtensions { |
| |
| template<typename T> |
| bool writeAllToFile(FileSystem::PlatformFileHandle file, const T& container) |
| { |
| auto bytes = reinterpret_cast<const uint8_t*>(container.data()); |
| size_t bytesLength = container.size() * sizeof(container[0]); |
| auto end = bytes + bytesLength; |
| while (bytes < end) { |
| auto written = FileSystem::writeToFile(file, bytes, bytesLength); |
| if (written == -1) |
| return false; |
| bytes += written; |
| bytesLength -= written; |
| } |
| return true; |
| } |
| |
| std::optional<SerializedNFA> SerializedNFA::serialize(NFA&& nfa) |
| { |
| auto file = FileSystem::invalidPlatformFileHandle; |
| auto filename = FileSystem::openTemporaryFile("SerializedNFA", file); |
| if (!FileSystem::isHandleValid(file)) |
| return std::nullopt; |
| |
| bool wroteSuccessfully = writeAllToFile(file, nfa.nodes) |
| && writeAllToFile(file, nfa.transitions) |
| && writeAllToFile(file, nfa.targets) |
| && writeAllToFile(file, nfa.epsilonTransitionsTargets) |
| && writeAllToFile(file, nfa.actions); |
| if (!wroteSuccessfully) { |
| FileSystem::closeFile(file); |
| FileSystem::deleteFile(filename); |
| return std::nullopt; |
| } |
| |
| bool mappedSuccessfully = false; |
| FileSystem::MappedFileData mappedFile(file, FileSystem::MappedFileMode::Private, mappedSuccessfully); |
| FileSystem::closeFile(file); |
| FileSystem::deleteFile(filename); |
| if (!mappedSuccessfully) |
| return std::nullopt; |
| |
| Metadata metadata { |
| nfa.nodes.size(), |
| nfa.transitions.size(), |
| nfa.targets.size(), |
| nfa.epsilonTransitionsTargets.size(), |
| nfa.actions.size(), |
| 0, |
| nfa.nodes.size() * sizeof(nfa.nodes[0]), |
| nfa.nodes.size() * sizeof(nfa.nodes[0]) |
| + nfa.transitions.size() * sizeof(nfa.transitions[0]), |
| nfa.nodes.size() * sizeof(nfa.nodes[0]) |
| + nfa.transitions.size() * sizeof(nfa.transitions[0]) |
| + nfa.targets.size() * sizeof(nfa.targets[0]), |
| nfa.nodes.size() * sizeof(nfa.nodes[0]) |
| + nfa.transitions.size() * sizeof(nfa.transitions[0]) |
| + nfa.targets.size() * sizeof(nfa.targets[0]) |
| + nfa.epsilonTransitionsTargets.size() * sizeof(nfa.epsilonTransitionsTargets[0]) |
| }; |
| |
| nfa.clear(); |
| |
| return {{ WTFMove(mappedFile), WTFMove(metadata) }}; |
| } |
| |
| SerializedNFA::SerializedNFA(FileSystem::MappedFileData&& file, Metadata&& metadata) |
| : m_file(WTFMove(file)) |
| , m_metadata(WTFMove(metadata)) |
| { |
| } |
| |
| template<typename T> |
| const T* SerializedNFA::pointerAtOffsetInFile(size_t offset) const |
| { |
| return reinterpret_cast<const T*>(static_cast<const uint8_t*>(m_file.data()) + offset); |
| } |
| |
| auto SerializedNFA::nodes() const -> const Range<ImmutableNFANode> |
| { |
| return { pointerAtOffsetInFile<ImmutableNFANode>(m_metadata.nodesOffset), m_metadata.nodesSize }; |
| } |
| |
| auto SerializedNFA::transitions() const -> const Range<ImmutableRange<char>> |
| { |
| return { pointerAtOffsetInFile<ImmutableRange<char>>(m_metadata.transitionsOffset), m_metadata.transitionsSize }; |
| } |
| |
| auto SerializedNFA::targets() const -> const Range<uint32_t> |
| { |
| return { pointerAtOffsetInFile<uint32_t>(m_metadata.targetsOffset), m_metadata.targetsSize }; |
| } |
| |
| auto SerializedNFA::epsilonTransitionsTargets() const -> const Range<uint32_t> |
| { |
| return { pointerAtOffsetInFile<uint32_t>(m_metadata.epsilonTransitionsTargetsOffset), m_metadata.epsilonTransitionsTargetsSize }; |
| } |
| |
| auto SerializedNFA::actions() const -> const Range<uint64_t> |
| { |
| return { pointerAtOffsetInFile<uint64_t>(m_metadata.actionsOffset), m_metadata.actionsSize }; |
| } |
| |
| } // namespace ContentExtensions |
| } // namespace WebCore |
| |
| #endif // ENABLE(CONTENT_EXTENSIONS) |