Extract PeerAddress class into separate file

src/base/bittorrent/peeraddress.cpp

@@ -0,0 +1,58 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2019  Vladimir Golovnev <glassez@yandex.ru>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link this program with the OpenSSL project's "OpenSSL" library (or with
+ * modified versions of it that use the same license as the "OpenSSL" library),
+ * and distribute the linked executables. You must obey the GNU General Public
+ * License in all respects for all of the code used other than "OpenSSL".  If you
+ * modify file(s), you may extend this exception to your version of the file(s),
+ * but you are not obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ */
+
+#include "peeraddress.h"
+
+#include <QString>
+#include <QStringList>
+
+BitTorrent::PeerAddress BitTorrent::PeerAddress::parse(QString peerAddressStr)
+{
+    PeerAddress addr;
+    QStringList ipPort;
+
+    if ((peerAddressStr[0] == '[') && (peerAddressStr.indexOf("]:") != -1)) // IPv6
+        ipPort = peerAddressStr.remove(QChar('[')).split("]:");
+    else if (peerAddressStr.indexOf(':') != -1) // IPv4
+        ipPort = peerAddressStr.split(':');
+    else
+        return addr;
+
+    QHostAddress ip(ipPort[0]);
+    if (ip.isNull())
+        return addr;
+
+    bool ok;
+    int port = ipPort[1].toInt(&ok);
+    if (!ok || (port < 1) || (port > 65535))
+        return addr;
+
+    addr.ip = ip;
+    addr.port = port;
+    return addr;
+}