QTextStream capture stdout from xsltParseStylesheetFile

[patrik08]

a external lib funktion write to stdout i see on debug mode this...
cur = xsltParseStylesheetFile( (const xmlChar*)gocharxslt.data() );

How i can capture this important error to say user error line xx tag ...

wenn i start a QTextStream out(stdout); is only write to stdout
i grab only ###start#### & #### end ##### and not stdout from xsltParseStylesheetFile on php i use http://php.net/ob-start and grab all or partial...

qDebug() << "### SHORTFILE  "  << SHORTFILE;
    qDebug() << "### DATA_FILE_XML  "  << DATA_FILE_XML;
    qDebug() << "### DATA_CONVERTER  "  << DATA_CONVERTER;
    QString actualxslt = xsl_area->document()->toPlainText();
    fxslt = db->file_put_contents(DATA_CONVERTER,actualxslt);
    QString actualxml = xml_area->document()->toPlainText();
    fxml = db->file_put_contents(DATA_FILE_XML,actualxslt);
 
         /* ######################################### */
         xsltStylesheetPtr cur = NULL;
         xmlDocPtr doc, outputDoc;
         xmlSubstituteEntitiesDefault(1);
        /* ######################################### */
        QTextStream out(stdout);
        out << "######################start############################\n";
        QByteArray gocharxslt = DATA_CONVERTER.toAscii();
        cur = xsltParseStylesheetFile( (const xmlChar*)gocharxslt.data() );
        if (!cur) {
            xslt_error = "XSLT! [7] XsltParseStylesheetFile Failture files =>"+DATA_CONVERTER; 
         } 
         out << "\n#######################stop###########################\n" << endl;
         capturesdout = out.readAll();
         out.flush();
         qDebug() << "### CUR error   "  << cur;
         qDebug() << "### capturesdout error   "  << capturesdout;
          xsltFreeStylesheet(cur);

qDebug() << "### SHORTFILE  "  << SHORTFILE;
    qDebug() << "### DATA_FILE_XML  "  << DATA_FILE_XML;
    qDebug() << "### DATA_CONVERTER  "  << DATA_CONVERTER;
    QString actualxslt = xsl_area->document()->toPlainText();
    fxslt = db->file_put_contents(DATA_CONVERTER,actualxslt);
    QString actualxml = xml_area->document()->toPlainText();
    fxml = db->file_put_contents(DATA_FILE_XML,actualxslt);
    
         /* ######################################### */
         xsltStylesheetPtr cur = NULL;
         xmlDocPtr doc, outputDoc;
         xmlSubstituteEntitiesDefault(1);
        /* ######################################### */
        QTextStream out(stdout);
        out << "######################start############################\n";
        QByteArray gocharxslt = DATA_CONVERTER.toAscii();
        cur = xsltParseStylesheetFile( (const xmlChar*)gocharxslt.data() );
        if (!cur) {
            xslt_error = "XSLT! [7] XsltParseStylesheetFile Failture files =>"+DATA_CONVERTER; 
         } 
         out << "\n#######################stop###########################\n" << endl;
         capturesdout = out.readAll();
         out.flush();
         qDebug() << "### CUR error   "  << cur;
         qDebug() << "### capturesdout error   "  << capturesdout;
          xsltFreeStylesheet(cur);

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