// SPDX-License-Identifier: GPL-3.0-only
/*
 *  PolyMC - Minecraft Launcher
 *  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
 *
 *      Authors: Orochimarufan <orochimarufan.x3@gmail.com>
 *
 *      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 "Commandline.h"

/**
 * @file libutil/src/cmdutils.cpp
 */

namespace Commandline
{

// commandline splitter
QStringList splitArgs(QString args)
{
    QStringList argv;
    QString current;
    bool escape = false;
    QChar inquotes;
    for (int i = 0; i < args.length(); i++)
    {
        QChar cchar = args.at(i);

        // \ escaped
        if (escape)
        {
            current += cchar;
            escape = false;
            // in "quotes"
        }
        else if (!inquotes.isNull())
        {
            if (cchar == '\\')
                escape = true;
            else if (cchar == inquotes)
                inquotes = QChar::Null;
            else
                current += cchar;
            // otherwise
        }
        else
        {
            if (cchar == ' ')
            {
                if (!current.isEmpty())
                {
                    argv << current;
                    current.clear();
                }
            }
            else if (cchar == '"' || cchar == '\'')
                inquotes = cchar;
            else
                current += cchar;
        }
    }
    if (!current.isEmpty())
        argv << current;
    return argv;
}
}