Function getRelFilePath

src/3rdparty/QXlsx/source/xlsxutility.cpp:41–57

* Return the .rel file path based on filePath */

 * Return the .rel file path based on filePath
 */
QString getRelFilePath(const QString &filePath)
{
    QString ret;

    int idx = filePath.lastIndexOf(QLatin1Char('/'));
    if (idx == -1) // not found
    {
        // return QString();

        // dev34
        ret = QLatin1String("_rels/") + QStringLiteral("%0.rels").arg(filePath);
        return ret;
    }

    ret = QString( filePath.left(idx) + QLatin1String("/_rels/") +  filePath.mid(idx+1) + QLatin1String(".rels"));
    return ret;
}

double datetimeToNumber(const QDateTime &dt, bool is1904)
{