PrismLauncher/launcher/Version.h
flow 445f9e5f71
feat+fix(Version): make comparsion FlexVer-compatible
... and fixes a minor issue in the parsing.

This changes the expected behavior of Versions in one significant way:
Now, Versions like 1.2 or 1.5 evaluate to LESS THAN 1.2.0 and 1.5.0
respectively. This makes sense for sorting versions, since one expects
the versions without patch release to 'contain' the ones with, so the
ones without should be evaluated uniformily with the ones with the
patch.

Signed-off-by: flow <flowlnlnln@gmail.com>
2023-01-21 18:47:47 -03:00

171 lines
5.3 KiB
C++

// SPDX-License-Identifier: GPL-3.0-only
/*
* PolyMC - Minecraft Launcher
* Copyright (C) 2023 flowln <flowlnlnln@gmail.com>
* Copyright (C) 2022 Sefa Eyeoglu <contact@scrumplex.net>
*
* 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, version 3.
*
* 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, see <https://www.gnu.org/licenses/>.
*
* This file incorporates work covered by the following copyright and
* permission notice:
*
* Copyright 2013-2021 MultiMC Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <QDebug>
#include <QList>
#include <QString>
#include <QStringView>
class QUrl;
class Version {
public:
Version(QString str);
Version() = default;
bool operator<(const Version &other) const;
bool operator<=(const Version &other) const;
bool operator>(const Version &other) const;
bool operator>=(const Version &other) const;
bool operator==(const Version &other) const;
bool operator!=(const Version &other) const;
QString toString() const { return m_string; }
friend QDebug operator<<(QDebug debug, const Version& v);
private:
struct Section {
explicit Section(QString fullString) : m_fullString(std::move(fullString))
{
int cutoff = m_fullString.size();
for (int i = 0; i < m_fullString.size(); i++) {
if (!m_fullString[i].isDigit()) {
cutoff = i;
break;
}
}
#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
auto numPart = QStringView{m_fullString}.left(cutoff);
#else
auto numPart = m_fullString.leftRef(cutoff);
#endif
if (!numPart.isEmpty()) {
m_isNull = false;
m_numPart = numPart.toInt();
}
#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
auto stringPart = QStringView{m_fullString}.mid(cutoff);
#else
auto stringPart = m_fullString.midRef(cutoff);
#endif
if (!stringPart.isEmpty()) {
m_isNull = false;
m_stringPart = stringPart.toString();
}
}
explicit Section() = default;
bool m_isNull = true;
int m_numPart = 0;
QString m_stringPart;
QString m_fullString;
[[nodiscard]] inline bool isAppendix() const { return m_stringPart.startsWith('+'); }
[[nodiscard]] inline bool isPreRelease() const { return m_stringPart.startsWith('-') && m_stringPart.length() > 1; }
inline bool operator==(const Section& other) const
{
if (m_isNull && !other.m_isNull)
return false;
if (!m_isNull && other.m_isNull)
return false;
if (!m_isNull && !other.m_isNull) {
return (m_numPart == other.m_numPart) && (m_stringPart == other.m_stringPart);
}
return true;
}
inline bool operator<(const Section& other) const
{
static auto unequal_is_less = [](Section const& non_null) -> bool {
if (non_null.m_stringPart.isEmpty())
return non_null.m_numPart == 0;
return (non_null.m_stringPart != QLatin1Char('.')) && non_null.isPreRelease();
};
if (!m_isNull && other.m_isNull)
return unequal_is_less(*this);
if (m_isNull && !other.m_isNull)
return !unequal_is_less(other);
if (!m_isNull && !other.m_isNull) {
if (m_numPart < other.m_numPart)
return true;
if (m_numPart == other.m_numPart && m_stringPart < other.m_stringPart)
return true;
if (!m_stringPart.isEmpty() && other.m_stringPart.isEmpty())
return false;
if (m_stringPart.isEmpty() && !other.m_stringPart.isEmpty())
return true;
return false;
}
return m_fullString < other.m_fullString;
}
inline bool operator!=(const Section& other) const
{
return !(*this == other);
}
inline bool operator>(const Section &other) const
{
return !(*this < other || *this == other);
}
};
private:
QString m_string;
QList<Section> m_sections;
void parse();
};