84 lines
2.3 KiB
C++
84 lines
2.3 KiB
C++
/* 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 "classfile.h"
|
|
#include "classparser.h"
|
|
|
|
#include <QFile>
|
|
#include <quazipfile.h>
|
|
#include <QDebug>
|
|
|
|
namespace classparser
|
|
{
|
|
|
|
QString GetMinecraftJarVersion(QString jarName)
|
|
{
|
|
QString version;
|
|
|
|
// check if minecraft.jar exists
|
|
QFile jar(jarName);
|
|
if (!jar.exists())
|
|
return version;
|
|
|
|
// open minecraft.jar
|
|
QuaZip zip(&jar);
|
|
if (!zip.open(QuaZip::mdUnzip))
|
|
return version;
|
|
|
|
// open Minecraft.class
|
|
zip.setCurrentFile("net/minecraft/client/Minecraft.class", QuaZip::csSensitive);
|
|
QuaZipFile Minecraft(&zip);
|
|
if (!Minecraft.open(QuaZipFile::ReadOnly))
|
|
return version;
|
|
|
|
// read Minecraft.class
|
|
qint64 size = Minecraft.size();
|
|
char *classfile = new char[size];
|
|
Minecraft.read(classfile, size);
|
|
|
|
// parse Minecraft.class
|
|
try
|
|
{
|
|
char *temp = classfile;
|
|
java::classfile MinecraftClass(temp, size);
|
|
java::constant_pool constants = MinecraftClass.constants;
|
|
for (java::constant_pool::container_type::const_iterator iter = constants.begin();
|
|
iter != constants.end(); iter++)
|
|
{
|
|
const java::constant &constant = *iter;
|
|
if (constant.type != java::constant_type_t::j_string_data)
|
|
continue;
|
|
const std::string &str = constant.str_data;
|
|
qDebug() << QString::fromStdString(str);
|
|
if (str.compare(0, 20, "Minecraft Minecraft ") == 0)
|
|
{
|
|
version = str.substr(20).data();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
catch (const java::classfile_exception &) { }
|
|
|
|
// clean up
|
|
delete[] classfile;
|
|
Minecraft.close();
|
|
zip.close();
|
|
jar.close();
|
|
|
|
return version;
|
|
}
|
|
}
|