Add 'meshmc/' from commit 'fad6a1066616b69d7f5fef01178efdf014c59537'

git-subtree-dir: meshmc
git-subtree-mainline: 934382c8a1ce738589dee9ee0f14e1cec812770e
git-subtree-split: fad6a1066616b69d7f5fef01178efdf014c59537

1 files changed, 172 insertions, 0 deletions

diff --git a/meshmc/launcher/settings/INIFile.cpp b/meshmc/launcher/settings/INIFile.cpp
new file mode 100644
index 0000000000..08a9538fea
--- /dev/null
+++ b/meshmc/launcher/settings/INIFile.cpp
@@ -0,0 +1,172 @@
+/* SPDX-FileCopyrightText: 2026 Project Tick
+ * SPDX-FileContributor: Project Tick
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ *   MeshMC - A Custom Launcher for Minecraft
+ *   Copyright (C) 2026 Project Tick
+ *
+ *   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 3 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, 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.
+ */
+
+#include "settings/INIFile.h"
+#include <FileSystem.h>
+
+#include <QFile>
+#include <QTextStream>
+#include <QStringList>
+#include <QSaveFile>
+#include <QDebug>
+
+INIFile::INIFile() {}
+
+QString INIFile::unescape(QString orig)
+{
+	QString out;
+	QChar prev = QChar();
+	for (auto c : orig) {
+		if (prev == QLatin1Char('\\')) {
+			if (c == 'n')
+				out += '\n';
+			else if (c == 't')
+				out += '\t';
+			else if (c == '#')
+				out += '#';
+			else
+				out += c;
+			prev = QChar();
+		} else {
+			if (c == '\\') {
+				prev = c;
+				continue;
+			}
+			out += c;
+			prev = QChar();
+		}
+	}
+	return out;
+}
+
+QString INIFile::escape(QString orig)
+{
+	QString out;
+	for (auto c : orig) {
+		if (c == '\n')
+			out += "\\n";
+		else if (c == '\t')
+			out += "\\t";
+		else if (c == '\\')
+			out += "\\\\";
+		else if (c == '#')
+			out += "\\#";
+		else
+			out += c;
+	}
+	return out;
+}
+
+bool INIFile::saveFile(QString fileName)
+{
+	QByteArray outArray;
+	for (Iterator iter = begin(); iter != end(); iter++) {
+		QString value = iter.value().toString();
+		value = escape(value);
+		outArray.append(iter.key().toUtf8());
+		outArray.append('=');
+		outArray.append(value.toUtf8());
+		outArray.append('\n');
+	}
+
+	try {
+		FS::write(fileName, outArray);
+	} catch (const Exception& e) {
+		qCritical() << e.what();
+		return false;
+	}
+
+	return true;
+}
+
+bool INIFile::loadFile(QString fileName)
+{
+	QFile file(fileName);
+	if (!file.open(QIODevice::ReadOnly))
+		return false;
+	bool success = loadFile(file.readAll());
+	file.close();
+	return success;
+}
+
+bool INIFile::loadFile(QByteArray file)
+{
+	QTextStream in(file);
+	// Qt6 uses UTF-8 by default
+
+	QStringList lines = in.readAll().split('\n');
+	for (int i = 0; i < lines.count(); i++) {
+		QString& lineRaw = lines[i];
+		// Ignore comments.
+		int commentIndex = 0;
+		QString line = lineRaw;
+		// Search for comments until no more escaped # are available
+		while ((commentIndex = line.indexOf('#', commentIndex + 1)) != -1) {
+			if (commentIndex > 0 && line.at(commentIndex - 1) == '\\') {
+				continue;
+			}
+			line = line.left(lineRaw.indexOf('#')).trimmed();
+		}
+
+		int eqPos = line.indexOf('=');
+		if (eqPos == -1)
+			continue;
+		QString key = line.left(eqPos).trimmed();
+		QString valueStr = line.right(line.length() - eqPos - 1).trimmed();
+
+		valueStr = unescape(valueStr);
+
+		QVariant value(valueStr);
+		this->operator[](key) = value;
+	}
+
+	return true;
+}
+
+QVariant INIFile::get(QString key, QVariant def) const
+{
+	if (!this->contains(key))
+		return def;
+	else
+		return this->operator[](key);
+}
+
+void INIFile::set(QString key, QVariant val)
+{
+	this->operator[](key) = val;
+}