/*
 * Bittorrent Client using Qt and libtorrent.
 * Copyright (C) 2015  Vladimir Golovnev <glassez@yandex.ru>
 * Copyright (C) 2006  Christophe Dumez <chris@qbittorrent.org>
 *
 * 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.
 */

#ifndef UTILS_STRING_H
#define UTILS_STRING_H

#include <string>
#include <QtGlobal>
#if (QT_VERSION >= QT_VERSION_CHECK(5, 2, 0))
#include <QCollator>
#endif

class QString;
class QByteArray;

namespace Utils
{
    namespace String
    {
        QString fromStdString(const std::string &str);
        std::string toStdString(const QString &str);
        QString fromDouble(double n, int precision);

        // Implements constant-time comparison to protect against timing attacks
        // Taken from https://crackstation.net/hashing-security.htm
        bool slowEquals(const QByteArray &a, const QByteArray &b);

        bool naturalSort(const QString &left, const QString &right, bool &result);

        class NaturalCompare
        {
        public:
            NaturalCompare();
            bool operator()(const QString &l, const QString &r);
            bool lessThan(const QString &left, const QString &right);
#if (QT_VERSION >= QT_VERSION_CHECK(5, 2, 0))
        private:
            QCollator m_collator;
#endif
        };
    }
}

#endif // UTILS_STRING_H
