Be a bit more picky on config files

1 files changed, 3 insertions, 1 deletions

diff --git a/library/config.cpp b/library/config.cpp
index 8b60f60..0bfb476 100644
--- a/library/config.cpp
+++ b/library/config.cpp
@@ -143,436 +143,438 @@ bool Config::hasKey( const QString &key ) const
 */
 void Config::setGroup( const QString &gname )
 {
     QMap< QString, ConfigGroup>::Iterator it = groups.find( gname );
     if ( it == groups.end() ) {
 	git = groups.insert( gname, ConfigGroup() );
 	changed = TRUE;
 	return;
     }
     git = it;
 }
 
 /*!
   Writes a (\a key, \a value) entry to the current group.
 
   \sa readEntry()
 */
 void Config::writeEntry( const QString &key, const char* value )
 {
     writeEntry(key,QString(value));
 }
 
 /*!
   Writes a (\a key, \a value) entry to the current group.
 
   \sa readEntry()
 */
 void Config::writeEntry( const QString &key, const QString &value )
 {
     if ( git == groups.end() ) {
 	qWarning( "no group set" );
 	return;
     }
     if ( (*git)[key] != value ) {
 	( *git ).insert( key, value );
 	changed = TRUE;
     }
 }
 
 /*
   Note that the degree of protection offered by the encryption here is
   only sufficient to avoid the most casual observation of the configuration
   files. People with access to the files can write down the contents and
   decrypt it using this source code.
 
   Conceivably, and at some burden to the user, this encryption could
   be improved.
 */
 static QString encipher(const QString& plain)
 {
     // mainly, we make it long
     QString cipher;
     int mix=28730492;
     for (int i=0; i<(int)plain.length(); i++) {
 	int u = plain[i].unicode();
 	int c = u ^ mix;
 	QString x = QString::number(c,36);
 	cipher.append(QChar('a'+x.length()));
 	cipher.append(x);
 	mix *= u;
     }
     return cipher;
 }
 
 static QString decipher(const QString& cipher)
 {
     QString plain;
     int mix=28730492;
     for (int i=0; i<(int)cipher.length();) {
 	int l = cipher[i].unicode()-'a';
 	QString x = cipher.mid(i+1,l); i+=l+1;
 	int u = x.toInt(0,36) ^ mix;
 	plain.append(QChar(u));
 	mix *= u;
     }
     return plain;
 }
 
 /*!
   Writes an encrypted (\a key, \a value) entry to the current group.
 
   Note that the degree of protection offered by the encryption is
   only sufficient to avoid the most casual observation of the configuration
   files.
 
   \sa readEntry()
 */
 void Config::writeEntryCrypt( const QString &key, const QString &value )
 {
     if ( git == groups.end() ) {
 	qWarning( "no group set" );
 	return;
     }
     QString evalue = encipher(value);
     if ( (*git)[key] != evalue ) {
 	( *git ).insert( key, evalue );
 	changed = TRUE;
     }
 }
 
 /*!
   Writes a (\a key, \a num) entry to the current group.
 
   \sa readNumEntry()
 */
 void Config::writeEntry( const QString &key, int num )
 {
     QString s;
     s.setNum( num );
     writeEntry( key, s );
 }
 
 #ifdef Q_HAS_BOOL_TYPE
 /*!
   Writes a (\a key, \a b) entry to the current group. This is equivalent
   to writing a 0 or 1 as an integer entry.
 
   \sa readBoolEntry()
 */
 void Config::writeEntry( const QString &key, bool b )
 {
     QString s;
     s.setNum( ( int )b );
     writeEntry( key, s );
 }
 #endif
 
 /*!
   Writes a (\a key, \a lst) entry to the current group. The list
   is separated by \a sep, so the strings must not contain that character.
 
   \sa readListEntry()
 */
 void Config::writeEntry( const QString &key, const QStringList &lst, const QChar &sep )
 {
     QString s;
     QStringList::ConstIterator it = lst.begin();
     for ( ; it != lst.end(); ++it )
 	s += *it + sep;
     writeEntry( key, s );
 }
 
 /*!
   Removes the \a key entry from the current group. Does nothing if
   there is no such entry.
 */
 
 void Config::removeEntry( const QString &key )
 {
     if ( git == groups.end() ) {
 	qWarning( "no group set" );
 	return;
     }
     ( *git ).remove( key );
     changed = TRUE;
 }
 
 /*!
   \fn bool Config::operator == ( const Config & other ) const
 
   Tests for equality with \a other. Config objects are equal if they refer to the same filename.
 */
 
 /*!
   \fn bool Config::operator != ( const Config & other ) const
 
   Tests for inequality with \a other. Config objects are equal if they refer to the same filename.
 */
 
 /*!
   \fn QString Config::readEntry( const QString &key, const QString &deflt ) const
 
   Reads a string entry stored with \a key, defaulting to \a deflt if there is no entry.
 */
 
 /*!
   \internal
   For compatibility, non-const version.
 */
 QString Config::readEntry( const QString &key, const QString &deflt )
 {
     QString res = readEntryDirect( key+"["+lang+"]" );
     if ( !res.isNull() )
 	return res;
     if ( !glang.isEmpty() ) {
 	res = readEntryDirect( key+"["+glang+"]" );
 	if ( !res.isNull() )
 	    return res;
     }
     return readEntryDirect( key, deflt );
 }
 
 /*!
   \fn QString Config::readEntryCrypt( const QString &key, const QString &deflt ) const
 
   Reads an encrypted string entry stored with \a key, defaulting to \a deflt if there is no entry.
 */
 
 /*!
   \internal
   For compatibility, non-const version.
 */
 QString Config::readEntryCrypt( const QString &key, const QString &deflt )
 {
     QString res = readEntryDirect( key+"["+lang+"]" );
     if ( res.isNull() && glang.isEmpty() )
 	res = readEntryDirect( key+"["+glang+"]" );
     if ( res.isNull() )
 	res = readEntryDirect( key, QString::null );
     if ( res.isNull() )
 	return deflt;
     return decipher(res);
 }
 
 /*!
   \fn QString Config::readEntryDirect( const QString &key, const QString &deflt ) const
   \internal
 */
 
 /*!
   \internal
   For compatibility, non-const version.
 */
 QString Config::readEntryDirect( const QString &key, const QString &deflt )
 {
     if ( git == groups.end() ) {
 	//qWarning( "no group set" );
 	return deflt;
     }
     ConfigGroup::ConstIterator it = ( *git ).find( key );
     if ( it != ( *git ).end() )
 	return *it;
     else
 	return deflt;
 }
 
 /*!
   \fn int Config::readNumEntry( const QString &key, int deflt ) const
   Reads a numeric entry stored with \a key, defaulting to \a deflt if there is no entry.
 */
 
 /*!
   \internal
   For compatibility, non-const version.
 */
 int Config::readNumEntry( const QString &key, int deflt )
 {
     QString s = readEntry( key );
     if ( s.isEmpty() )
 	return deflt;
     else
 	return s.toInt();
 }
 
 /*!
   \fn bool Config::readBoolEntry( const QString &key, bool deflt ) const
   Reads a bool entry stored with \a key, defaulting to \a deflt if there is no entry.
 */
 
 /*!
   \internal
   For compatibility, non-const version.
 */
 bool Config::readBoolEntry( const QString &key, bool deflt )
 {
     QString s = readEntry( key );
     if ( s.isEmpty() )
 	return deflt;
     else
 	return (bool)s.toInt();
 }
 
 /*!
   \fn QStringList Config::readListEntry( const QString &key, const QChar &sep ) const
   Reads a string list entry stored with \a key, and with \a sep as the separator.
 */
 
 /*!
   \internal
   For compatibility, non-const version.
 */
 QStringList Config::readListEntry( const QString &key, const QChar &sep )
 {
     QString s = readEntry( key );
     if ( s.isEmpty() )
 	return QStringList();
     else
 	return QStringList::split( sep, s );
 }
 
 /*!
   Removes all entries from the current group.
 */
 void Config::clearGroup()
 {
     if ( git == groups.end() ) {
 	qWarning( "no group set" );
 	return;
     }
     if ( !(*git).isEmpty() ) {
 	( *git ).clear();
 	changed = TRUE;
     }
 }
 
 /*!
   \internal
 */
 void Config::write( const QString &fn )
 {
     QString strNewFile;
     if ( !fn.isEmpty() )
 	filename = fn;
     strNewFile = filename + ".new";
 
     QFile f( strNewFile );
     if ( !f.open( IO_WriteOnly|IO_Raw ) ) {
 	qWarning( "could not open for writing `%s'", strNewFile.latin1() );
 	git = groups.end();
 	return;
     }
 
     QString str;
     QCString cstr;
     QMap< QString, ConfigGroup >::Iterator g_it = groups.begin();
 
     for ( ; g_it != groups.end(); ++g_it ) {
  	str += "[" + g_it.key() + "]\n";
  	ConfigGroup::Iterator e_it = ( *g_it ).begin();
  	for ( ; e_it != ( *g_it ).end(); ++e_it )
  	    str += e_it.key() + " = " + *e_it + "\n";
     }
     cstr = str.utf8();
 
     int total_length;
     total_length = f.writeBlock( cstr.data(), cstr.length() );
     if ( total_length != int(cstr.length()) ) {
 	QMessageBox::critical( 0, QObject::tr("Out of Space"),
 			       QObject::tr("There was a problem creating\nConfiguration Information \nfor this program.\n\nPlease free up some space and\ntry again.") );
 	f.close();
 	QFile::remove( strNewFile );
 	return;
     }
 
     f.close();
     // now rename the file...
     if ( rename( strNewFile, filename ) < 0 ) {
 	qWarning( "problem renaming the file %s to %s", strNewFile.latin1(),
 		  filename.latin1() );
 	QFile::remove( strNewFile );
     }
 }
 
 /*!
   Returns whether the Config is in a valid state.
 */
 bool Config::isValid() const
 {
     return groups.end() != git;
 }
 
 /*!
   \internal
 */
 void Config::read()
 {
     changed = FALSE;
 
     if ( !QFileInfo( filename ).exists() ) {
 	git = groups.end();
 	return;
     }
 
     QFile f( filename );
     if ( !f.open( IO_ReadOnly ) ) {
 	git = groups.end();
 	return;
     }
 
 
     // hack to avoid problems if big files are passed to test
     // if they are valid configs ( like passing a mp3 ... )
     // I just hope that there are no conf files > 100000 byte
     // not the best solution, find something else later
-    if ( f.size() > 100000 )  {
+    if ( f.getch()!='[' ||f.size() > 100000 )  {
+        git = groups.end();
         return;
     }
+    f.ungetch('[');
 
 
     QTextStream s( &f );
 #if QT_VERSION <= 230 && defined(QT_NO_CODECS)
     // The below should work, but doesn't in Qt 2.3.0
     s.setCodec( QTextCodec::codecForMib( 106 ) );
 #else
     s.setEncoding( QTextStream::UnicodeUTF8 );
 #endif
 
     QStringList list = QStringList::split('\n', s.read() );
     f.close();
 
     for ( QStringList::Iterator it = list.begin(); it != list.end(); ++it ) {
         if ( !parse( *it ) ) {
             git = groups.end();
             return;
         }
     }
 }
 
 /*!
   \internal
 */
 bool Config::parse( const QString &l )
 {
     QString line = l.stripWhiteSpace();
 
     if ( line [0] == QChar ( '#' ))
     	return true; // ignore comments
 
     if ( line[ 0 ] == QChar( '[' ) ) {
 	QString gname = line;
 	gname = gname.remove( 0, 1 );
 	if ( gname[ (int)gname.length() - 1 ] == QChar( ']' ) )
 	    gname = gname.remove( gname.length() - 1, 1 );
 	git = groups.insert( gname, ConfigGroup() );
     } else if ( !line.isEmpty() ) {
 	if ( git == groups.end() )
 	    return FALSE;
 	int eq = line.find( '=' );
 	if ( eq == -1 )
 	    return FALSE;
 	QString key = line.left(eq).stripWhiteSpace();
 	QString value = line.mid(eq+1).stripWhiteSpace();
 	( *git ).insert( key, value );
     }
     return TRUE;
 }