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Use new create_torrent constructor were available.

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sledgehammer999 2017-02-20 23:55:44 +02:00
parent ad4b691fa5
commit b5f81a34cb
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1 changed files with 28 additions and 1 deletions
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29
src/base/bittorrent/torrenthandle.cpp
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@ -27,6 +27,8 @@
* exception statement from your version.
*/
#include <type_traits>
#include <QDebug>
#include <QStringList>
#include <QFile>
@ -192,6 +194,31 @@ const qreal TorrentHandle::NO_RATIO_LIMIT = -1.;
const qreal TorrentHandle::MAX_RATIO = 9999.;
// The new libtorrent::create_torrent constructor appeared after 1.0.11 in RC_1_0
// and after 1.1.1 in RC_1_1. Since it fixed an ABI incompatibility with previous versions
// distros might choose to backport it onto 1.0.11 and 1.1.1 respectively.
// So we need a way to detect its presence without relying solely on the LIBTORRENT_VERSION_NUM.
// Relevant links:
// 1. https://github.com/arvidn/libtorrent/issues/1696
// 2. https://github.com/qbittorrent/qBittorrent/issues/6406
// The following can be removed after one or two libtorrent releases on each branch.
namespace
{
// new constructor is available
template<typename T, typename std::enable_if<std::is_constructible<T, libt::torrent_info, bool>::value, int>::type = 0>
T makeTorrentCreator(const libtorrent::torrent_info & ti)
{
return T(ti, true);
}
// new constructor isn't available
template<typename T, typename std::enable_if<!std::is_constructible<T, libt::torrent_info, bool>::value, int>::type = 0>
T makeTorrentCreator(const libtorrent::torrent_info & ti)
{
return T(ti);
}
}
TorrentHandle::TorrentHandle(Session *session, const libtorrent::torrent_handle &nativeHandle,
const AddTorrentData &data)
: QObject(session)
@ -1318,7 +1345,7 @@ bool TorrentHandle::saveTorrentFile(const QString &path)
{
if (!m_torrentInfo.isValid()) return false;
libt::create_torrent torrentCreator(*(m_torrentInfo.nativeInfo()));
libt::create_torrent torrentCreator = makeTorrentCreator<libt::create_torrent>(*(m_torrentInfo.nativeInfo()));
libt::entry torrentEntry = torrentCreator.generate();
QVector<char> out;