diff -r 6482875b0d97 -r 171da01bd04d QTfrontend/util/FileEngine.cpp
--- a/QTfrontend/util/FileEngine.cpp	Fri Nov 30 18:19:52 2012 +0400
+++ b/QTfrontend/util/FileEngine.cpp	Tue Dec 04 09:15:55 2012 +0400
@@ -10,8 +10,10 @@
 
 FileEngine::FileEngine(const QString& filename)
     : m_handle(NULL)
+    , m_size(0)
     , m_flags(0)
     , m_bufferSet(false)
+    , m_readWrite(false)
 {
     setFileName(filename);
 }
@@ -25,7 +27,16 @@
 {
     close();
 
-    if (openMode & QIODevice::WriteOnly) {
+    if ((openMode & QIODevice::ReadWrite) == QIODevice::ReadWrite) {
+        m_handle = PHYSFS_openAppend(m_fileName.toUtf8().constData());
+        if(m_handle)
+        {
+            m_readWrite = true;
+            seek(0);
+        }
+    }
+
+    else if (openMode & QIODevice::WriteOnly) {
         m_handle = PHYSFS_openWrite(m_fileName.toUtf8().constData());
         m_flags = QAbstractFileEngine::WriteOwnerPerm | QAbstractFileEngine::WriteUserPerm | QAbstractFileEngine::FileType;
     }
@@ -76,9 +87,22 @@
     return PHYSFS_tell(m_handle);
 }
 
+bool FileEngine::setSize(qint64 size)
+{
+    if(size == 0)
+    {
+        m_size = 0;
+        return open(QIODevice::WriteOnly);
+    }
+    else
+        return false;
+}
+
 bool FileEngine::seek(qint64 pos)
 {
-    return PHYSFS_seek(m_handle, pos) != 0;
+    bool ok = PHYSFS_seek(m_handle, pos) != 0;
+
+    return ok;
 }
 
 bool FileEngine::isSequential() const
@@ -94,12 +118,14 @@
 bool FileEngine::mkdir(const QString &dirName, bool createParentDirectories) const
 {
     Q_UNUSED(createParentDirectories);
+
     return PHYSFS_mkdir(dirName.toUtf8().constData()) != 0;
 }
 
 bool FileEngine::rmdir(const QString &dirName, bool recurseParentDirectories) const
 {
     Q_UNUSED(recurseParentDirectories);
+
     return PHYSFS_delete(dirName.toUtf8().constData()) != 0;
 }
 
@@ -110,7 +136,7 @@
 
 bool FileEngine::isRelativePath() const
 {
-    return true;
+    return false;
 }
 
 QAbstractFileEngineIterator * FileEngine::beginEntryList(QDir::Filters filters, const QStringList &filterNames)
@@ -171,7 +197,6 @@
 
 QDateTime FileEngine::fileTime(FileTime time) const
 {
-
     switch (time)
     {
         case QAbstractFileEngine::ModificationTime:
@@ -187,21 +212,21 @@
         m_fileName = file.mid(FileEngineHandler::scheme.size());
     else
         m_fileName = file;
-
     PHYSFS_Stat stat;
-    if (PHYSFS_stat(m_fileName.toUtf8().constData(), &stat) != 0) {
+    if (PHYSFS_stat(m_fileName.toUtf8().constData(), &stat) != 0) {        
         m_size = stat.filesize;
         m_date = QDateTime::fromTime_t(stat.modtime);
-//        _flags |= QAbstractFileEngine::WriteUserPerm;
+//        m_flags |= QAbstractFileEngine::WriteOwnerPerm;
+        m_flags |= QAbstractFileEngine::ReadOwnerPerm;
         m_flags |= QAbstractFileEngine::ReadUserPerm;
         m_flags |= QAbstractFileEngine::ExistsFlag;
+        m_flags |= QAbstractFileEngine::LocalDiskFlag;
 
         switch (stat.filetype)
         {
             case PHYSFS_FILETYPE_REGULAR:
                 m_flags |= QAbstractFileEngine::FileType;
                 break;
-
             case PHYSFS_FILETYPE_DIRECTORY:
                 m_flags |= QAbstractFileEngine::DirectoryType;
                 break;
@@ -220,7 +245,16 @@
 
 qint64 FileEngine::read(char *data, qint64 maxlen)
 {
-    return PHYSFS_readBytes(m_handle, data, maxlen);
+    if(m_readWrite)
+    {
+        if(pos() == 0)
+            open(QIODevice::ReadOnly);
+        else
+            return -1;
+    }
+
+    qint64 len = PHYSFS_readBytes(m_handle, data, maxlen);
+    return len;
 }
 
 qint64 FileEngine::readLine(char *data, qint64 maxlen)
@@ -286,7 +320,7 @@
 QAbstractFileEngine* FileEngineHandler::create(const QString &filename) const
 {
     if (filename.startsWith(scheme))
-        return new FileEngine(filename.mid(scheme.size()));
+        return new FileEngine(filename);
     else
         return NULL;
 }