BitTorrent::TorrentInfo Class Reference

#include <torrentinfo.h>

Public Types
using	PieceRange = IndexRange< int >

Public Member Functions
	TorrentInfo ()=default
	TorrentInfo (const TorrentInfo &other)
	TorrentInfo (const lt::torrent_info &nativeInfo)
nonstd::expected< void, QString >	saveToFile (const QString &path) const
TorrentInfo &	operator= (const TorrentInfo &other)
bool	isValid () const
InfoHash	infoHash () const
QString	name () const
QDateTime	creationDate () const
QString	creator () const
QString	comment () const
bool	isPrivate () const
qlonglong	totalSize () const
int	filesCount () const
int	pieceLength () const
int	pieceLength (int index) const
int	piecesCount () const
QString	filePath (int index) const
QStringList	filePaths () const
qlonglong	fileSize (int index) const
qlonglong	fileOffset (int index) const
QVector< TrackerEntry >	trackers () const
QVector< QUrl >	urlSeeds () const
QByteArray	metadata () const
QStringList	filesForPiece (int pieceIndex) const
QVector< int >	fileIndicesForPiece (int pieceIndex) const
QVector< QByteArray >	pieceHashes () const
PieceRange	filePieces (const QString &file) const
PieceRange	filePieces (int fileIndex) const
QString	rootFolder () const
bool	hasRootFolder () const
std::shared_ptr< lt::torrent_info >	nativeInfo () const
QVector< lt::file_index_t >	nativeIndexes () const

Static Public Member Functions
static nonstd::expected< TorrentInfo, QString >	load (const QByteArray &data) noexcept
static nonstd::expected< TorrentInfo, QString >	loadFromFile (const QString &path) noexcept

Private Member Functions
int	fileIndex (const QString &fileName) const
TorrentContentLayout	contentLayout () const

Private Attributes
std::shared_ptr< const lt::torrent_info >	m_nativeInfo
QVector< lt::file_index_t >	m_nativeIndexes

Detailed Description

Definition at line 50 of file torrentinfo.h.

Member Typedef Documentation

PieceRange

using BitTorrent::TorrentInfo::PieceRange = IndexRange<int>

Definition at line 89 of file torrentinfo.h.

Constructor & Destructor Documentation

TorrentInfo() [1/3]

BitTorrent::TorrentInfo::TorrentInfo ( )

default

TorrentInfo() [2/3]

TorrentInfo::TorrentInfo

(

const TorrentInfo &

other

)

Definition at line 68 of file torrentinfo.cpp.

    : m_nativeInfo {other.m_nativeInfo}
    , m_nativeIndexes {other.m_nativeIndexes}
{
}

TorrentInfo() [3/3]

TorrentInfo::TorrentInfo ( const lt::torrent_info &  nativeInfo )

explicit

Definition at line 54 of file torrentinfo.cpp.

    : m_nativeInfo {std::make_shared<const lt::torrent_info>(nativeInfo)}
{
    Q_ASSERT(m_nativeInfo->is_valid() && (m_nativeInfo->num_files() > 0));
 
    const lt::file_storage &fileStorage = m_nativeInfo->orig_files();
    m_nativeIndexes.reserve(fileStorage.num_files());
    for (const lt::file_index_t nativeIndex : fileStorage.file_range())
    {
        if (!fileStorage.pad_file_at(nativeIndex))
            m_nativeIndexes.append(nativeIndex);
    }
}

References m_nativeIndexes, and m_nativeInfo.

Member Function Documentation

comment()

QString TorrentInfo::comment

(

)

const

Definition at line 190 of file torrentinfo.cpp.

{
    if (!isValid()) return {};
 
    return QString::fromStdString(m_nativeInfo->comment());
}

References isValid(), and m_nativeInfo.

Referenced by BitTorrent::TorrentImpl::comment(), and AddNewTorrentDialog::setupTreeview().

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contentLayout()

TorrentContentLayout TorrentInfo::contentLayout ( ) const

private

Definition at line 425 of file torrentinfo.cpp.

{
    if (!isValid())
        return TorrentContentLayout::Original;
 
    return detectContentLayout(filePaths());
}

References BitTorrent::detectContentLayout(), filePaths(), and isValid().

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creationDate()

QDateTime TorrentInfo::creationDate

(

)

const

Definition at line 175 of file torrentinfo.cpp.

{
    if (!isValid()) return {};
 
    const std::time_t date = m_nativeInfo->creation_date();
    return ((date != 0) ? QDateTime::fromSecsSinceEpoch(date) : QDateTime());
}

References isValid(), and m_nativeInfo.

Referenced by BitTorrent::TorrentImpl::creationDate(), and AddNewTorrentDialog::setupTreeview().

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creator()

QString TorrentInfo::creator

(

)

const

Definition at line 183 of file torrentinfo.cpp.

{
    if (!isValid()) return {};
 
    return QString::fromStdString(m_nativeInfo->creator());
}

References isValid(), and m_nativeInfo.

Referenced by BitTorrent::TorrentImpl::creator().

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fileIndex()

int TorrentInfo::fileIndex ( const QString &  fileName ) const

private

Definition at line 399 of file torrentinfo.cpp.

{
    // the check whether the object is valid is not needed here
    // because if filesCount() returns -1 the loop exits immediately
    for (int i = 0; i < filesCount(); ++i)
    {
        if (fileName == filePath(i))
            return i;
    }
 
    return -1;
}

References Utils::Fs::fileName(), filePath(), and filesCount().

Referenced by filePieces().

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fileIndicesForPiece()

QVector< int > TorrentInfo::fileIndicesForPiece

(

int

pieceIndex

)

const

Definition at line 328 of file torrentinfo.cpp.

{
    if (!isValid() || (pieceIndex < 0) || (pieceIndex >= piecesCount()))
        return {};
 
    const std::vector<lt::file_slice> files = m_nativeInfo->map_block(
                lt::piece_index_t {pieceIndex}, 0, m_nativeInfo->piece_size(lt::piece_index_t {pieceIndex}));
    QVector<int> res;
    res.reserve(static_cast<decltype(res)::size_type>(files.size()));
    for (const lt::file_slice &fileSlice : files)
    {
        const int index = m_nativeIndexes.indexOf(fileSlice.file_index);
        if (index >= 0)
            res.append(index);
    }
 
    return res;
}

References files(), isValid(), m_nativeIndexes, m_nativeInfo, and piecesCount().

Referenced by filesForPiece(), PiecesBar::highlightFile(), and PiecesBar::showToolTip().

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fileOffset()

qlonglong TorrentInfo::fileOffset

(

int

index

)

const

Definition at line 264 of file torrentinfo.cpp.

{
    if (!isValid()) return -1;
 
    return m_nativeInfo->orig_files().file_offset(m_nativeIndexes[index]);
}

References isValid(), m_nativeIndexes, and m_nativeInfo.

Referenced by filePieces().

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filePath()

QString TorrentInfo::filePath

(

int

index

)

const

Definition at line 239 of file torrentinfo.cpp.

{
    if (!isValid()) return {};
 
    return Utils::Fs::toUniformPath(
                QString::fromStdString(m_nativeInfo->orig_files().file_path(m_nativeIndexes[index])));
}

References isValid(), m_nativeIndexes, m_nativeInfo, and Utils::Fs::toUniformPath().

Referenced by BitTorrent::Session::addTorrent_impl(), fileIndex(), filePaths(), and PiecesBar::showToolTip().

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filePaths()

QStringList TorrentInfo::filePaths

(

)

const

Definition at line 247 of file torrentinfo.cpp.

{
    QStringList list;
    list.reserve(filesCount());
    for (int i = 0; i < filesCount(); ++i)
        list << filePath(i);
 
    return list;
}

References filePath(), and filesCount().

Referenced by BitTorrent::Session::addTorrent_impl(), contentLayout(), AddNewTorrentDialog::contentLayoutChanged(), BitTorrent::Session::findIncompleteFiles(), BitTorrent::TorrentImpl::handleSaveResumeDataAlert(), rootFolder(), and AddNewTorrentDialog::setupTreeview().

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filePieces() [1/2]

TorrentInfo::PieceRange TorrentInfo::filePieces

(

const QString &

file

)

const

Definition at line 362 of file torrentinfo.cpp.

{
    if (!isValid()) // if we do not check here the debug message will be printed, which would be not correct
        return {};
 
    const int index = fileIndex(file);
    if (index == -1)
    {
        qDebug() << "Filename" << file << "was not found in torrent" << name();
        return {};
    }
    return filePieces(index);
}

References file(), fileIndex(), isValid(), and name().

Referenced by BitTorrent::TorrentImpl::applyFirstLastPiecePriority(), BitTorrent::TorrentImpl::availableFileFractions(), TorrentsController::filesAction(), and PiecesBar::highlightFile().

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filePieces() [2/2]

TorrentInfo::PieceRange TorrentInfo::filePieces

(

int

fileIndex

)

const

Definition at line 376 of file torrentinfo.cpp.

{
    if (!isValid())
        return {};
 
    if ((fileIndex < 0) || (fileIndex >= filesCount()))
    {
        qDebug() << "File index (" << fileIndex << ") is out of range for torrent" << name();
        return {};
    }
 
    const lt::file_storage &files = m_nativeInfo->orig_files();
    const auto fileSize = files.file_size(m_nativeIndexes[fileIndex]);
    const auto fileOffset = files.file_offset(m_nativeIndexes[fileIndex]);
 
    const int beginIdx = (fileOffset / pieceLength());
    const int endIdx = ((fileOffset + fileSize - 1) / pieceLength());
 
    if (fileSize <= 0)
        return {beginIdx, 0};
    return makeInterval(beginIdx, endIdx);
}

References fileIndex(), fileOffset(), files(), filesCount(), fileSize(), isValid(), m_nativeIndexes, m_nativeInfo, makeInterval(), name(), and pieceLength().

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filesCount()

int TorrentInfo::filesCount

(

)

const

Definition at line 211 of file torrentinfo.cpp.

{
    if (!isValid()) return -1;
 
    return m_nativeIndexes.size();
}

References isValid(), and m_nativeIndexes.

Referenced by BitTorrent::Session::addTorrent_impl(), fileIndex(), filePaths(), filePieces(), BitTorrent::TorrentImpl::filesCount(), anonymous_namespace{addnewtorrentdialog.cpp}::FileStorageAdaptor::FileStorageAdaptor(), BitTorrent::Session::findIncompleteFiles(), BitTorrent::TorrentImpl::TorrentImpl(), and AddNewTorrentDialog::updateDiskSpaceLabel().

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filesForPiece()

QStringList TorrentInfo::filesForPiece

(

int

pieceIndex

)

const

Definition at line 315 of file torrentinfo.cpp.

{
    // no checks here because fileIndicesForPiece() will return an empty list
    const QVector<int> fileIndices = fileIndicesForPiece(pieceIndex);
 
    QStringList res;
    res.reserve(fileIndices.size());
    std::transform(fileIndices.begin(), fileIndices.end(), std::back_inserter(res),
        [this](int i) { return filePath(i); });
 
    return res;
}

References fileIndicesForPiece().

Referenced by SyncController::torrentPeersAction(), and PeerListWidget::updatePeer().

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fileSize()

qlonglong TorrentInfo::fileSize

(

int

index

)

const

Definition at line 257 of file torrentinfo.cpp.

{
    if (!isValid()) return -1;
 
    return m_nativeInfo->orig_files().file_size(m_nativeIndexes[index]);
}

References isValid(), m_nativeIndexes, and m_nativeInfo.

Referenced by filePieces(), BitTorrent::TorrentImpl::fileSize(), PiecesBar::showToolTip(), and AddNewTorrentDialog::updateDiskSpaceLabel().

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hasRootFolder()

bool TorrentInfo::hasRootFolder

(

)

const

Definition at line 420 of file torrentinfo.cpp.

{
    return !rootFolder().isEmpty();
}

References rootFolder().

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infoHash()

InfoHash TorrentInfo::infoHash

(

)

const

Definition at line 157 of file torrentinfo.cpp.

{
    if (!isValid()) return {};
 
#ifdef QBT_USES_LIBTORRENT2
    return m_nativeInfo->info_hashes();
#else
    return m_nativeInfo->info_hash();
#endif
}

References isValid(), and m_nativeInfo.

Referenced by BitTorrent::Session::findIncompleteFiles(), AddNewTorrentDialog::loadTorrentImpl(), and AddNewTorrentDialog::updateMetadata().

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isPrivate()

bool TorrentInfo::isPrivate

(

)

const

Definition at line 197 of file torrentinfo.cpp.

{
    if (!isValid()) return false;
 
    return m_nativeInfo->priv();
}

References isValid(), and m_nativeInfo.

Referenced by BitTorrent::Session::addTorrent_impl(), BitTorrent::TorrentImpl::isPrivate(), and AddNewTorrentDialog::loadTorrentImpl().

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isValid()

bool TorrentInfo::isValid

(

)

const

Definition at line 84 of file torrentinfo.cpp.

{
    return (m_nativeInfo != nullptr);
}

References m_nativeInfo.

Referenced by comment(), contentLayout(), creationDate(), creator(), fileIndicesForPiece(), fileOffset(), filePath(), filePieces(), filesCount(), fileSize(), AddNewTorrentDialog::hasMetadata(), BitTorrent::TorrentImpl::hasMetadata(), infoHash(), isPrivate(), metadata(), name(), nativeInfo(), pieceHashes(), pieceLength(), piecesCount(), rootFolder(), saveToFile(), totalSize(), trackers(), AddNewTorrentDialog::updateMetadata(), and urlSeeds().

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load()

nonstd::expected< TorrentInfo, QString > TorrentInfo::load ( const QByteArray &  data )

staticnoexcept

Definition at line 89 of file torrentinfo.cpp.

{
    // 2-step construction to overcome default limits of `depth_limit` & `token_limit` which are
    // used in `torrent_info()` constructor
    const int depthLimit = 100;
    const int tokenLimit = 10000000;
 
    lt::error_code ec;
    const lt::bdecode_node node = lt::bdecode(data, ec
        , nullptr, depthLimit, tokenLimit);
    if (ec)
        return nonstd::make_unexpected(QString::fromStdString(ec.message()));
 
    lt::torrent_info nativeInfo {node, ec};
    if (ec)
        return nonstd::make_unexpected(QString::fromStdString(ec.message()));
 
    return TorrentInfo(nativeInfo);
}

Referenced by TorrentsController::addAction(), AddNewTorrentDialog::handleDownloadFinished(), and BitTorrent::Session::handleDownloadFinished().

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loadFromFile()

nonstd::expected< TorrentInfo, QString > TorrentInfo::loadFromFile ( const QString &  path )

staticnoexcept

Definition at line 109 of file torrentinfo.cpp.

{
    QFile file {path};
    if (!file.open(QIODevice::ReadOnly))
        return nonstd::make_unexpected(file.errorString());
 
    if (file.size() > MAX_TORRENT_SIZE)
        return nonstd::make_unexpected(tr("File size exceeds max limit %1").arg(Utils::Misc::friendlyUnit(MAX_TORRENT_SIZE)));
 
    QByteArray data;
    try
    {
        data = file.readAll();
    }
    catch (const std::bad_alloc &e)
    {
        return nonstd::make_unexpected(tr("Torrent file read error: %1").arg(e.what()));
    }
 
    if (data.size() != file.size())
        return nonstd::make_unexpected(tr("Torrent file read error: size mismatch"));
 
    file.close();
 
    return load(data);
}

References nova3.nova2dl::e, file(), Utils::Misc::friendlyUnit(), and MAX_TORRENT_SIZE.

Referenced by BitTorrent::Session::addTorrent(), TorrentCreatorDialog::handleCreationSuccess(), BitTorrent::Session::handleTorrentFinished(), AddNewTorrentDialog::loadTorrentFile(), TorrentFilesWatcher::Worker::processFailedTorrents(), TorrentFilesWatcher::Worker::processFolder(), and BitTorrent::Session::recursiveTorrentDownload().

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metadata()

QByteArray TorrentInfo::metadata

(

)

const

Definition at line 304 of file torrentinfo.cpp.

{
    if (!isValid()) return {};
#ifdef QBT_USES_LIBTORRENT2
    const lt::span<const char> infoSection {m_nativeInfo->info_section()};
    return {infoSection.data(), static_cast<int>(infoSection.size())};
#else
    return {m_nativeInfo->metadata().get(), m_nativeInfo->metadata_size()};
#endif
}

References isValid(), and m_nativeInfo.

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name()

QString TorrentInfo::name

(

)

const

Definition at line 168 of file torrentinfo.cpp.

{
    if (!isValid()) return {};
 
    return QString::fromStdString(m_nativeInfo->orig_files().name());
}

References isValid(), and m_nativeInfo.

Referenced by BitTorrent::Session::addTorrent_impl(), filePieces(), BitTorrent::TorrentImpl::name(), AddNewTorrentDialog::saveTorrentFile(), and AddNewTorrentDialog::setupTreeview().

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nativeIndexes()

QVector< lt::file_index_t > TorrentInfo::nativeIndexes

(

)

const

Definition at line 441 of file torrentinfo.cpp.

{
    return m_nativeIndexes;
}

References m_nativeIndexes.

Referenced by BitTorrent::TorrentImpl::actualFilePath(), BitTorrent::Session::addTorrent_impl(), BitTorrent::TorrentImpl::endReceivedMetadataHandling(), BitTorrent::TorrentImpl::filePriorities(), BitTorrent::Session::fileSearchFinished(), BitTorrent::TorrentImpl::filesProgress(), BitTorrent::TorrentImpl::handleFileCompletedAlert(), BitTorrent::TorrentImpl::handleFileRenamedAlert(), BitTorrent::TorrentImpl::handleFileRenameFailedAlert(), BitTorrent::TorrentImpl::prioritizeFiles(), BitTorrent::TorrentImpl::renameFile(), and BitTorrent::TorrentImpl::TorrentImpl().

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nativeInfo()

std::shared_ptr< lt::torrent_info > TorrentInfo::nativeInfo

(

)

const

Definition at line 433 of file torrentinfo.cpp.

{
    if (!isValid())
        return nullptr;
 
    return std::make_shared<lt::torrent_info>(*m_nativeInfo);
}

References isValid(), and m_nativeInfo.

Referenced by BitTorrent::Session::addTorrent_impl(), BitTorrent::TorrentImpl::prioritizeFiles(), and saveToFile().

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operator=()

TorrentInfo & TorrentInfo::operator=

(

const TorrentInfo &

other

)

Definition at line 74 of file torrentinfo.cpp.

{
    if (this != &other)
    {
        m_nativeInfo = other.m_nativeInfo;
        m_nativeIndexes = other.m_nativeIndexes;
    }
    return *this;
}

References m_nativeIndexes, and m_nativeInfo.

pieceHashes()

QVector< QByteArray > TorrentInfo::pieceHashes

(

)

const

Definition at line 347 of file torrentinfo.cpp.

{
    if (!isValid())
        return {};
 
    const int count = piecesCount();
    QVector<QByteArray> hashes;
    hashes.reserve(count);
 
    for (int i = 0; i < count; ++i)
        hashes += {m_nativeInfo->hash_for_piece_ptr(lt::piece_index_t {i}), SHA1Hash::length()};
 
    return hashes;
}

References isValid(), Digest32< 160 >::length(), m_nativeInfo, and piecesCount().

Referenced by TorrentsController::pieceHashesAction().

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pieceLength() [1/2]

int TorrentInfo::pieceLength

(

)

const

Definition at line 218 of file torrentinfo.cpp.

{
    if (!isValid()) return -1;
 
    return m_nativeInfo->piece_length();
}

References isValid(), and m_nativeInfo.

Referenced by filePieces(), BitTorrent::TorrentImpl::pieceLength(), and PiecesBar::showToolTip().

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pieceLength() [2/2]

int TorrentInfo::pieceLength

(

int

index

)

const

Definition at line 225 of file torrentinfo.cpp.

{
    if (!isValid()) return -1;
 
    return m_nativeInfo->piece_size(lt::piece_index_t {index});
}

References isValid(), and m_nativeInfo.

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piecesCount()

int TorrentInfo::piecesCount

(

)

const

Definition at line 232 of file torrentinfo.cpp.

{
    if (!isValid()) return -1;
 
    return m_nativeInfo->num_pieces();
}

References isValid(), and m_nativeInfo.

Referenced by fileIndicesForPiece(), pieceHashes(), and BitTorrent::TorrentImpl::piecesCount().

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rootFolder()

QString TorrentInfo::rootFolder

(

)

const

Definition at line 412 of file torrentinfo.cpp.

{
    if (!isValid())
        return {};
 
    return Utils::Fs::findRootFolder(filePaths());
}

References filePaths(), Utils::Fs::findRootFolder(), and isValid().

Referenced by BitTorrent::Session::addTorrent_impl(), hasRootFolder(), and BitTorrent::TorrentImpl::rootPath().

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saveToFile()

nonstd::expected< void, QString > TorrentInfo::saveToFile

(

const QString &

path

)

const

Definition at line 136 of file torrentinfo.cpp.

{
    if (!isValid())
        return nonstd::make_unexpected(tr("Invalid metadata"));
 
    try
    {
        const auto torrentCreator = lt::create_torrent(*nativeInfo());
        const lt::entry torrentEntry = torrentCreator.generate();
        const nonstd::expected<void, QString> result = Utils::IO::saveToFile(path, torrentEntry);
        if (!result)
            return result.get_unexpected();
    }
    catch (const lt::system_error &err)
    {
        return nonstd::make_unexpected(QString::fromLocal8Bit(err.what()));
    }
 
    return {};
}

References isValid(), nativeInfo(), and Utils::IO::saveToFile().

Referenced by BitTorrent::Session::exportTorrentFile(), and AddNewTorrentDialog::saveTorrentFile().

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totalSize()

qlonglong TorrentInfo::totalSize

(

)

const

Definition at line 204 of file torrentinfo.cpp.

{
    if (!isValid()) return -1;
 
    return m_nativeInfo->total_size();
}

References isValid(), and m_nativeInfo.

Referenced by anonymous_namespace{piecesbar.cpp}::PieceIndexToImagePos::PieceIndexToImagePos(), BitTorrent::TorrentImpl::totalSize(), and AddNewTorrentDialog::updateDiskSpaceLabel().

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trackers()

QVector< TrackerEntry > TorrentInfo::trackers

(

)

const

Definition at line 271 of file torrentinfo.cpp.

{
    if (!isValid()) return {};
 
    const std::vector<lt::announce_entry> trackers = m_nativeInfo->trackers();
 
    QVector<TrackerEntry> ret;
    ret.reserve(static_cast<decltype(ret)::size_type>(trackers.size()));
 
    for (const lt::announce_entry &tracker : trackers)
        ret.append({QString::fromStdString(tracker.url)});
 
    return ret;
}

References isValid(), and m_nativeInfo.

Referenced by BitTorrent::Session::addTorrent_impl(), and AddNewTorrentDialog::loadTorrentImpl().

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urlSeeds()

QVector< QUrl > TorrentInfo::urlSeeds

(

)

const

Definition at line 286 of file torrentinfo.cpp.

{
    if (!isValid()) return {};
 
    const std::vector<lt::web_seed_entry> &nativeWebSeeds = m_nativeInfo->web_seeds();
 
    QVector<QUrl> urlSeeds;
    urlSeeds.reserve(static_cast<decltype(urlSeeds)::size_type>(nativeWebSeeds.size()));
 
    for (const lt::web_seed_entry &webSeed : nativeWebSeeds)
    {
        if (webSeed.type == lt::web_seed_entry::url_seed)
            urlSeeds.append(QUrl(webSeed.url.c_str()));
    }
 
    return urlSeeds;
}

References isValid(), and m_nativeInfo.

Referenced by BitTorrent::Session::addTorrent_impl(), and AddNewTorrentDialog::loadTorrentImpl().

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Member Data Documentation

m_nativeIndexes

QVector<lt::file_index_t> BitTorrent::TorrentInfo::m_nativeIndexes

private

Definition at line 110 of file torrentinfo.h.

Referenced by fileIndicesForPiece(), fileOffset(), filePath(), filePieces(), filesCount(), fileSize(), nativeIndexes(), operator=(), and TorrentInfo().

m_nativeInfo

std::shared_ptr<const lt::torrent_info> BitTorrent::TorrentInfo::m_nativeInfo

private

Definition at line 106 of file torrentinfo.h.

Referenced by comment(), creationDate(), creator(), fileIndicesForPiece(), fileOffset(), filePath(), filePieces(), fileSize(), infoHash(), isPrivate(), isValid(), metadata(), name(), nativeInfo(), operator=(), pieceHashes(), pieceLength(), piecesCount(), TorrentInfo(), totalSize(), trackers(), and urlSeeds().

---

The documentation for this class was generated from the following files:

• src/base/bittorrent/torrentinfo.h
• src/base/bittorrent/torrentinfo.cpp