Esempio n. 1
0
KTimeZone KTimeZones::remove(const QString &name)
{
    if (!name.isEmpty())
    {
        ZoneMap::Iterator it = d->zones.find(name);
        if (it != d->zones.end())
        {
            KTimeZone zone = it.value();
            d->zones.erase(it);
            return zone;
        }
    }
    return KTimeZone();
}
Esempio n. 2
0
KTimeZone KTimeZones::remove(const KTimeZone &zone)
{
    if (zone.isValid())
    {
        for (ZoneMap::Iterator it = d->zones.begin(), end = d->zones.end();  it != end;  ++it)
        {
            if (it.value() == zone)
            {
                d->zones.erase(it);
                return zone;
            }
        }
    }
    return KTimeZone();
}
const KstTimezone *KstTimezones::local()
{
    const KstTimezone *local = 0;

    // First try the simplest solution of checking for well-formed TZ setting.
    char *envZone = ::getenv("TZ");
    if (envZone)
    {
        if (envZone[0] == '\0')
        {
            return m_UTC;
        }
        else
        if (envZone[0] == ':')
        {
            envZone++;
        }
        local = zone(envZone);
    }
    if (local)
        return local;

    // Try to match /etc/localtime against the list of zoneinfo files.
    QFile f;
    f.setName("/etc/localtime");
    if (f.open(IO_ReadOnly))
    {
        // Compute the MD5 sum of /etc/localtime.
        KMD5 context("");
        context.reset();
        context.update(f);
        QIODevice::Offset referenceSize = f.size();
        QString referenceMd5Sum = context.hexDigest();
        f.close();
        if (!m_zoneinfoDir.isEmpty())
        {
            // Compare it with each zoneinfo file.
            for (ZoneMap::Iterator it = m_zones->begin(); it != m_zones->end(); ++it)
            {
                KstTimezone *zone = it.data();
                f.setName(m_zoneinfoDir + '/' + zone->name());
                if (f.open(IO_ReadOnly))
                {
                    QIODevice::Offset candidateSize = f.size();
                    QString candidateMd5Sum;
                    if (candidateSize == referenceSize)
                    {
                        // Only do the heavy lifting for file sizes which match.
                        context.reset();
                        context.update(f);
                        candidateMd5Sum = context.hexDigest();
                    }
                    f.close();
                    if (candidateMd5Sum == referenceMd5Sum)
                    {
                        local = zone;
                        break;
                    }
                }
            }
        }
    }
    if (local)
        return local;

    // BSD support.
    QString fileZone;
    f.setName("/etc/timezone");
    if (!f.open(IO_ReadOnly))
    {
        // Solaris support using /etc/default/init.
        f.setName("/etc/default/init");
        if (f.open(IO_ReadOnly))
        {
            QTextStream ts(&f);
            ts.setEncoding(QTextStream::Latin1);

            // Read the last line starting "TZ=".
            while (!ts.atEnd())
            {
                fileZone = ts.readLine();
                if (fileZone.startsWith("TZ="))
                {
                    fileZone = fileZone.mid(3);

                    local = zone(fileZone);
                }
            }
            f.close();
        }
    }
    else
    {
        QTextStream ts(&f);
        ts.setEncoding(QTextStream::Latin1);

        // Read the first line.
        if (!ts.atEnd())
        {
            fileZone = ts.readLine();

            local = zone(fileZone);
        }
        f.close();
    }
    if (local)
        return local;

    // None of the deterministic stuff above has worked: try a heuristic. We
    // try to find a pair of matching timezone abbreviations...that way, we'll
    // likely return a value in the user's own country.
    if (!m_zoneinfoDir.isEmpty())
    {
        tzset();
        AbbreviationsMatch matcher(tzname[0], tzname[1]);
        int bestOffset = INT_MAX;
        for (ZoneMap::Iterator it = m_zones->begin(); it != m_zones->end(); ++it)
        {
            KstTimezone *zone = it.data();
            int candidateOffset = QABS(zone->offset(Qt::LocalTime));
            if (zone->parse(matcher) && matcher.test() && (candidateOffset < bestOffset))
            {
                bestOffset = candidateOffset;
                local = zone;
            }
        }
    }
    if (local)
        return local;
    return m_UTC;
}