* \param codec The text codec we use if the input is not utf8
* \return The decoded string.
*/
-COMMON_EXPORT QString decodeString(const QByteArray &input, QTextCodec *codec = 0);
+COMMON_EXPORT QString decodeString(const QByteArray &input, QTextCodec *codec = nullptr);
COMMON_EXPORT uint editingDistance(const QString &s1, const QString &s2);