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-rw-r--r--java/javautils.cpp130
1 files changed, 71 insertions, 59 deletions
diff --git a/java/javautils.cpp b/java/javautils.cpp
index a07d1541..bf4b5cdf 100644
--- a/java/javautils.cpp
+++ b/java/javautils.cpp
@@ -1,69 +1,81 @@
+/* Copyright 2013 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 "multimc_pragma.h"
#include "classfile.h"
#include "javautils.h"
-//#include <wx/zipstrm.h>
-#include <memory>
-//#include <wx/wfstream.h>
-//#include "mcversionlist.h"
+
+#include <QFile>
+#include <quazipfile.h>
namespace javautils
{
-QString GetMinecraftJarVersion(QString jar)
+
+QString GetMinecraftJarVersion(QString jarName)
{
- return "Unknown";
- /*
- wxString fullpath = jar.GetFullPath();
- wxString version = MCVer_Unknown;
- if(!jar.FileExists())
- return version;
- std::auto_ptr<wxZipEntry> entry;
- // convert the local name we are looking for into the internal format
- wxString name = wxZipEntry::GetInternalName("net/minecraft/client/Minecraft.class",wxPATH_UNIX);
+ QString version = MCVer_Unknown;
+
+ // 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;
- // open the zip
- wxFFileInputStream inStream(jar.GetFullPath());
- wxZipInputStream zipIn(inStream);
+ // 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::j_string_data)
+ continue;
+ const std::string & str = constant.str_data;
+ if (str.compare(0, 20, "Minecraft Minecraft ") == 0)
+ {
+ version = str.substr(20).data();
+ break;
+ }
+ }
+ } catch(java::classfile_exception &) {}
+
+ // clean up
+ delete[] classfile;
+ Minecraft.close();
+ zip.close();
+ jar.close();
+
+ return version;
+}
- // call GetNextEntry() until the required internal name is found
- do
- {
- entry.reset(zipIn.GetNextEntry());
- }
- while (entry.get() != NULL && entry->GetInternalName() != name);
- auto myentry = entry.get();
- if (myentry == NULL)
- return version;
-
- // we got the entry, read the data
- std::size_t size = myentry->GetSize();
- char *classdata = new char[size];
- zipIn.Read(classdata,size);
- try
- {
- char * temp = classdata;
- java::classfile Minecraft_jar(temp,size);
- auto cnst = Minecraft_jar.constants;
- auto iter = cnst.begin();
- while (iter != cnst.end())
- {
- const java::constant & constant = *iter;
- if(constant.type != java::constant::j_string_data)
- {
- iter++;
- continue;
- }
- auto & str = constant.str_data;
- const char * lookfor = "Minecraft Minecraft "; // length = 20
- if(str.compare(0,20,lookfor) == 0)
- {
- version = str.substr(20).data();
- break;
- }
- iter++;
- }
- } catch(java::classfile_exception &){}
- delete[] classdata;
- return version;
- */
}
-} \ No newline at end of file