qBittorrent/src/base/utils/compare.h
Chocobo1 a64bb1a990
Simplify natural sort classes interface
Now the comparison function/class should be constructed before usage.
This change also make it easier to plug in into various containers which
will require a compare function type (such as std::set).
2021-04-10 14:18:18 +08:00

88 lines
2.7 KiB
C++

/*
* Bittorrent Client using Qt and libtorrent.
* Copyright (C) 2021 Mike Tzou (Chocobo1)
*
* 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.
*/
#pragma once
#include <Qt>
#include <QtGlobal>
#ifndef Q_OS_WIN
#define QBT_USE_QCOLLATOR
#include <QCollator>
#endif
class QString;
namespace Utils::Compare
{
#ifdef QBT_USE_QCOLLATOR
template <Qt::CaseSensitivity caseSensitivity>
class NaturalCompare
{
public:
NaturalCompare()
{
m_collator.setNumericMode(true);
m_collator.setCaseSensitivity(caseSensitivity);
}
int operator()(const QString &left, const QString &right) const
{
return m_collator.compare(left, right);
}
private:
QCollator m_collator;
};
#else
int naturalCompare(const QString &left, const QString &right, Qt::CaseSensitivity caseSensitivity);
template <Qt::CaseSensitivity caseSensitivity>
class NaturalCompare
{
public:
int operator()(const QString &left, const QString &right) const
{
return naturalCompare(left, right, caseSensitivity);
}
};
#endif
template <Qt::CaseSensitivity caseSensitivity>
class NaturalLessThan
{
public:
bool operator()(const QString &left, const QString &right) const
{
return (m_comparator(left, right) < 0);
}
private:
NaturalCompare<caseSensitivity> m_comparator;
};
}