1 files changed, 113 insertions, 0 deletions
diff --git a/lib/qt-tar-xz/QTarDecode.cpp b/lib/qt-tar-xz/QTarDecode.cpp
new file mode 100644
index 0000000..fe15359
--- /dev/null
+++ b/lib/qt-tar-xz/QTarDecode.cpp
@@ -0,0 +1,113 @@
+/** \file QTarDecode.cpp
+\brief To read a tar data block
+\author alpha_one_x86
+\version 0.3
+\date 2010
+\licence GPL3, see the file COPYING */
+
+#include "QTarDecode.h"
+#include <QDebug>
+
+QTarDecode::QTarDecode()
+{
+	error="Unknow error";
+}
+
+QString QTarDecode::errorString()
+{
+	return error;
+}
+
+void QTarDecode::setErrorString(QString error)
+{
+	this->error=error;
+	fileList.clear();
+	dataList.clear();
+}
+
+bool QTarDecode::decodeData(QByteArray data)
+{
+	setErrorString("Unknow error");
+	if(data.size()<1024)
+		return false;
+	int offset=0;
+	while(offset<data.size())
+	{
+		//load the file name from ascii, from 0+offset with size of 100
+		QString fileName=data.mid(0+offset,100);
+		//load the file type
+		QString fileType=data.mid(156+offset,1);
+		//load the ustar string
+		QString ustar=data.mid(257+offset,5);
+		//load the ustar version
+		QString ustarVersion=data.mid(263+offset,2);
+		bool ok;
+		//load the file size from ascii, from 124+offset with size of 12
+		int finalSize=QString(data.mid(124+offset,12)).toUInt(&ok,8);
+		//if the size conversion to qulonglong have failed, then qui with error
+		if(ok==false)
+		{
+			//if((offset+1024)==data.size())
+			//it's the end of the archive, no more verification
+			break;
+			/*else
+			{
+				setErrorString("Unable to convert ascii size at "+QString::number(124+offset)+" to usigned long long: \""+QString(data.mid(124+offset,12))+"\"");
+				return false;
+			}*/
+		}
+		//if check if the ustar not found
+		if(ustar!="ustar")
+		{
+			setErrorString("\"ustar\" string not found at "+QString::number(257+offset)+", content: \""+ustar+"\"");
+			return false;
+		}
+		if(ustarVersion!="00")
+		{
+			setErrorString("ustar version string is wrong, content:\""+ustarVersion+"\"");
+			return false;
+		}
+		//check if the file have the good size for load the data
+		if((offset+512+finalSize)>data.size())
+		{
+			setErrorString("The tar file seem be too short");
+			return false;
+		}
+		if(fileType=="0") //this code manage only the file, then only the file is returned
+		{
+			QByteArray fileData=data.mid(512+offset,finalSize);
+			fileList << fileName;
+			dataList << fileData;
+		}
+		//calculate the offset for the next header
+		bool retenu=((finalSize%512)!=0);
+		//go to the next header
+		offset+=512+(finalSize/512+retenu)*512;
+	}
+	if(fileList.size()>0)
+	{
+		QString baseDirToTest=fileList.at(0);
+		baseDirToTest.remove(QRegExp("/.*$"));
+		baseDirToTest+='/';
+		bool isFoundForAllEntries=true;
+		for (int i = 0; i < fileList.size(); ++i)
+			if(!fileList.at(i).startsWith(baseDirToTest))
+				isFoundForAllEntries=false;
+		if(isFoundForAllEntries)
+			for (int i = 0; i < fileList.size(); ++i)
+				fileList[i].remove(0,baseDirToTest.size());
+	}
+	return true;
+}
+
+QStringList QTarDecode::getFileList()
+{
+	return fileList;
+}
+
+QList<QByteArray> QTarDecode::getDataList()
+{
+	return dataList;
+}
+
+