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-rw-r--r--java/constants.h12
-rw-r--r--java/javautils.cpp130
-rw-r--r--java/javautils.h25
3 files changed, 101 insertions, 66 deletions
diff --git a/java/constants.h b/java/constants.h
index 2f968d2e..80697ebe 100644
--- a/java/constants.h
+++ b/java/constants.h
@@ -7,7 +7,7 @@ namespace java
class constant
{
public:
- enum type_t:uint8_t
+ enum type_t : uint8_t
{
j_hole = 0, // HACK: this is a hole in the array, because java is crazy
j_string_data = 1,
@@ -22,6 +22,7 @@ namespace java
j_interface_methodref = 11,
j_nameandtype = 12
} type;
+
constant(util::membuffer & buf )
{
buf.read(type);
@@ -66,10 +67,12 @@ namespace java
break;
}
}
+
constant(int fake)
{
type = j_hole;
}
+
std::string toString()
{
std::ostringstream ss;
@@ -142,7 +145,8 @@ namespace java
uint16_t descriptor_index;
} name_and_type;
};
- };
+ };
+
/**
* A helper class that represents the custom container used in Java class file for storage of constants
*/
@@ -181,7 +185,7 @@ namespace java
index++;
}
}
- };
+ }
typedef std::vector<java::constant> container_type;
/**
* Access constants based on jar file index numbers (index of the first element is 1)
@@ -204,5 +208,5 @@ namespace java
}
private:
container_type constants;
- };
+ };
}
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
diff --git a/java/javautils.h b/java/javautils.h
index c8b5a793..7f9b6d89 100644
--- a/java/javautils.h
+++ b/java/javautils.h
@@ -1,9 +1,28 @@
+/* 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.
+ */
#pragma once
#include <QString>
+
+#define MCVer_Unknown "Unknown"
+
namespace javautils
{
- /*
- * Get the version from a minecraft.jar by parsing its class files. Expensive!
+ /**
+ * @brief Get the version from a minecraft.jar by parsing its class files. Expensive!
*/
QString GetMinecraftJarVersion(QString jar);
-} \ No newline at end of file
+}
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