refactor: use tr_torrent_metainfo in transmission-qt (#2342)

qt/AddData.cc

@@ -12,7 +12,9 @@
 #include <libtransmission/transmission.h>
 
 #include <libtransmission/crypto-utils.h> // tr_base64_encode()
+#include <libtransmission/torrent-metainfo.h>
 #include <libtransmission/utils.h>
+#include <libtransmission/error.h>
 
 #include "AddData.h"
 #include "Utils.h"
@@ -20,22 +22,16 @@
 namespace
 {
 
-QString getNameFromMetainfo(QByteArray const& metainfo)
+QString getNameFromMetainfo(QByteArray const& benc)
 {
-    QString name;
+    auto metainfo = tr_torrent_metainfo{};
-
+    if (metainfo.parseBenc({ benc.constData(), size_t(benc.size()) }))
-    tr_ctor* ctor = tr_ctorNew(nullptr);
-    tr_ctorSetMetainfo(ctor, metainfo.constData(), metainfo.size());
-
-    auto inf = tr_info{};
-    if (tr_torrentParse(ctor, &inf) == TR_PARSE_OK)
     {
-        name = QString::fromUtf8(inf.name); // metainfo is required to be UTF-8
+        auto const& mname = metainfo.name();
-        tr_metainfoFree(&inf);
+        return QString::fromUtf8(std::data(mname), std::size(mname));
     }
 
-    tr_ctorFree(ctor);
+    return {};
-    return name;
 }
 
 } // namespace

qt/OptionsDialog.cc

@@ -14,6 +14,7 @@
 #include <libtransmission/transmission.h>
 #include <libtransmission/utils.h> /* mime64 */
 #include <libtransmission/variant.h>
+#include <libtransmission/torrent-metainfo.h>
 
 #include "AddData.h"
 #include "FileTreeModel.h"
@@ -131,12 +132,7 @@ OptionsDialog::~OptionsDialog()
 
 void OptionsDialog::clearInfo()
 {
-    if (have_info_)
+    metainfo_.reset();
-    {
-        tr_metainfoFree(&info_);
-    }
-
-    have_info_ = false;
     files_.clear();
 }
 
@@ -144,55 +140,68 @@ void OptionsDialog::reload()
 {
     clearInfo();
 
-    tr_ctor* ctor = tr_ctorNew(nullptr);
+    auto metainfo = tr_torrent_metainfo{};
+    auto ok = bool{};
 
     switch (add_.type)
     {
     case AddData::MAGNET:
-        tr_ctorSetMetainfoFromMagnetLink(ctor, add_.magnet.toUtf8().constData());
+        {
-        break;
+            auto magnet = add_.magnet.toUtf8();
+            ok = metainfo.parseMagnet({ std::data(magnet), size_t(std::size(magnet)) });
+            break;
+        }
 
     case AddData::FILENAME:
-        tr_ctorSetMetainfoFromFile(ctor, add_.filename.toUtf8().constData());
+        {
-        break;
+            auto filename = add_.filename.toUtf8();
+            ok = metainfo.parseTorrentFile({ std::data(filename), size_t(std::size(filename)) });
+            break;
+        }
 
     case AddData::METAINFO:
-        tr_ctorSetMetainfo(ctor, add_.metainfo.constData(), add_.metainfo.size());
+        ok = metainfo.parseBenc({ std::data(add_.metainfo), size_t(std::size(add_.metainfo)) });
         break;
 
     default:
         break;
     }
 
-    int const err = tr_torrentParse(ctor, &info_);
+    metainfo_.reset();
-    have_info_ = err == 0;
-    tr_ctorFree(ctor);
-
     ui_.filesView->clear();
     files_.clear();
     priorities_.clear();
     wanted_.clear();
 
-    bool const have_files_to_show = have_info_ && info_.fileCount > 0;
+    if (ok)
+    {
+        metainfo_ = metainfo;
+    }
+
+    bool const have_files_to_show = metainfo_ && !std::empty(metainfo_->files());
 
     ui_.filesView->setVisible(have_files_to_show);
     layout()->setSizeConstraint(have_files_to_show ? QLayout::SetDefaultConstraint : QLayout::SetFixedSize);
 
-    if (have_info_)
+    if (metainfo_)
     {
-        priorities_.assign(info_.fileCount, TR_PRI_NORMAL);
+        size_t i = 0;
-        wanted_.assign(info_.fileCount, true);
+        auto const n_files = std::size(metainfo_->files());
+        priorities_.assign(n_files, TR_PRI_NORMAL);
+        wanted_.assign(n_files, true);
 
-        for (tr_file_index_t i = 0; i < info_.fileCount; ++i)
+        for (auto const& file : metainfo_->files())
         {
-            TorrentFile file;
+            auto f = TorrentFile{};
-            file.index = i;
+            f.index = i;
-            file.priority = priorities_[i];
+            f.priority = priorities_[i];
-            file.wanted = wanted_[i];
+            f.wanted = wanted_[i];
-            file.size = info_.files[i].length;
+            f.size = file.length();
-            file.have = 0;
+            f.have = 0;
-            file.filename = QString::fromUtf8(info_.files[i].name);
+            f.filename = QString::fromUtf8(std::data(file.path()), std::size(file.path()));
-            files_.push_back(file);
+            files_.push_back(f);
+
+            ++i;
         }
     }
 

qt/OptionsDialog.h

@@ -8,6 +8,7 @@
 
 #pragma once
 
+#include <optional>
 #include <vector>
 
 #include <QDir>
@@ -23,6 +24,10 @@
 #include "Torrent.h" // FileList
 #include "ui_OptionsDialog.h"
 
+#include <libtransmission/transmission.h>
+
+#include <libtransmission/torrent-metainfo.h>
+
 class Prefs;
 class Session;
 
@@ -66,7 +71,6 @@ private:
     std::vector<int> priorities_;
     Session& session_;
     Ui::OptionsDialog ui_ = {};
-    tr_info info_ = {};
+    std::optional<tr_torrent_metainfo> metainfo_;
-    bool have_info_ = {};
     bool is_local_ = {};
 };

qt/Torrent.h

@@ -117,6 +117,11 @@ public:
     {
     }
 
+    explicit TorrentHash(tr_sha1_digest_t const& data)
+        : data_{ data }
+    {
+    }
+
     explicit TorrentHash(char const* str)
     {
         data_ = tr_sha1_from_string(str != nullptr ? str : "");

qt/WatchDir.cc

@@ -12,6 +12,8 @@
 
 #include <libtransmission/transmission.h>
 
+#include <libtransmission/torrent-metainfo.h>
+
 #include "Prefs.h"
 #include "TorrentModel.h"
 #include "WatchDir.h"
@@ -31,35 +33,18 @@ WatchDir::WatchDir(TorrentModel const& model)
 
 int WatchDir::metainfoTest(QString const& filename) const
 {
-    int ret;
+    auto metainfo = tr_torrent_metainfo();
-    auto inf = tr_info{};
+    if (!metainfo.parseTorrentFile(filename.toUtf8().constData()))
-    tr_ctor* ctor = tr_ctorNew(nullptr);
-
-    // parse
-    tr_ctorSetMetainfoFromFile(ctor, filename.toUtf8().constData());
-    int const err = tr_torrentParse(ctor, &inf);
-
-    if (err != 0)
     {
-        ret = ERROR;
+        return ERROR;
-    }
-    else if (model_.hasTorrent(TorrentHash(inf.hashString)))
-    {
-        ret = DUPLICATE;
-    }
-    else
-    {
-        ret = OK;
     }
 
-    // cleanup
+    if (model_.hasTorrent(TorrentHash{ metainfo.infoHash() }))
-    if (err == 0)
     {
-        tr_metainfoFree(&inf);
+        return DUPLICATE;
     }
 
-    tr_ctorFree(ctor);
+    return OK;
-    return ret;
 }
 
 void WatchDir::onTimeout()