const KstTimezones::ZoneMap KstTimezones::allZones()
{
// Have we already done all the hard work? If not, create the cache.
if (m_zones)
return *m_zones;
m_zones = new ZoneMap();
// Go read the database.
//
// On Windows, HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones
// is the place to look. The TZI binary value is the TIME_ZONE_INFORMATION structure.
//
// For Unix its all easy except knowing where to look. Try the LSB location first.
QFile f;
m_zoneinfoDir = "/usr/share/zoneinfo";
f.setName(m_zoneinfoDir + "/zone.tab");
if (!f.open(IO_ReadOnly))
{
m_zoneinfoDir = "/usr/lib/zoneinfo";
f.setName(m_zoneinfoDir + "/zone.tab");
if (!f.open(IO_ReadOnly))
{
m_zoneinfoDir = ::getenv("TZDIR");
f.setName(m_zoneinfoDir + "/zone.tab");
if (m_zoneinfoDir.isEmpty() || !f.open(IO_ReadOnly))
{
// Solaris support. Synthesise something that looks like a zone.tab.
//
// /bin/grep -h ^Zone /usr/share/lib/zoneinfo/src/* | /bin/awk '{print "??\t+9999+99999\t" $2}'
//
// where the country code is set to "??" and the lattitude/longitude
// values are dummies.
m_zoneinfoDir = "/usr/share/lib/zoneinfo";
KTempFile temp;
KShellProcess reader;
reader << "/bin/grep" << "-h" << "^Zone" << m_zoneinfoDir << "/src/*" << temp.name() << "|" <<
"/bin/awk" << "'{print \"??\\t+9999+99999\\t\" $2}'";
// Note the use of blocking here...it is a trivial amount of data!
temp.close();
reader.start(KProcess::Block);
f.setName(temp.name());
if (!temp.status() || !f.open(IO_ReadOnly))
{
return *m_zones;
}
}
}
}
// Parse the zone.tab.
QTextStream str(&f);
QRegExp lineSeparator("[ \t]");
QRegExp ordinateSeparator("[+-]");
KSharedPtr<KstTimezoneSource> db(new KstTimezoneSource(m_zoneinfoDir));
while (!str.atEnd())
{
QString line = str.readLine();
if (line.isEmpty() || '#' == line[0])
continue;
QStringList tokens = KStringHandler::perlSplit(lineSeparator, line, 4);
if (tokens.count() < 3)
{
continue;
}
// Got three tokens. Now check for two ordinates plus first one is "".
QStringList ordinates = KStringHandler::perlSplit(ordinateSeparator, tokens[1], 2);
if (ordinates.count() < 2)
{
continue;
}
float latitude = convertCoordinate(ordinates[1]);
float longitude = convertCoordinate(ordinates[2]);
// Add entry to list.
if (tokens[0] == "??")
tokens[0] = "";
KstTimezone *timezone = new KstTimezone(db, tokens[2], tokens[0], latitude, longitude, tokens[3]);
add(timezone);
}
f.close();
return *m_zones;
}
/*
* Find the location of the zoneinfo files and store in mZoneinfoDir.
* Parse zone.tab and for each time zone, create a KSystemTimeZone instance.
*/
void KSystemTimeZonesPrivate::readZoneTab(bool update)
{
kDebug(161) << "readZoneTab(" << m_zonetab<< ")";
QStringList newZones;
QFile f;
f.setFileName(m_zonetab);
if (!f.open(QIODevice::ReadOnly))
return;
QTextStream str(&f);
QRegExp lineSeparator("[ \t]");
QRegExp ordinateSeparator("[+-]");
if (!m_source)
m_source = new KSystemTimeZoneSource;
while (!str.atEnd())
{
QString line = str.readLine();
if (line.isEmpty() || line[0] == '#')
continue;
QStringList tokens = KStringHandler::perlSplit(lineSeparator, line, 4);
int n = tokens.count();
if (n < 3)
{
kError(161) << "readZoneTab(): invalid record: " << line << endl;
continue;
}
// Got three tokens. Now check for two ordinates plus first one is "".
int i = tokens[1].indexOf(ordinateSeparator, 1);
if (i < 0)
{
kError(161) << "readZoneTab() " << tokens[2] << ": invalid coordinates: " << tokens[1] << endl;
continue;
}
float latitude = convertCoordinate(tokens[1].left(i));
float longitude = convertCoordinate(tokens[1].mid(i));
// Add entry to list.
if (tokens[0] == "??")
tokens[0] = "";
// Solaris sets the empty Comments field to '-', making it not empty.
// Clean it up.
if (n > 3 && tokens[3] == "-")
tokens[3] = "";
KSystemTimeZone tz(m_source, tokens[2], tokens[0], latitude, longitude, (n > 3 ? tokens[3] : QString()));
if (update)
{
// Update the existing collection with the new zone definition
newZones += tz.name();
KTimeZone oldTz = zone(tz.name());
if (oldTz.isValid())
oldTz.updateBase(tz); // the zone previously existed, so update its definition
else
add(tz); // the zone didn't previously exist, so add it
}
else
add(tz);
}
f.close();
if (update)
{
// Remove any zones from the collection which no longer exist
const ZoneMap oldZones = zones();
for (ZoneMap::ConstIterator it = oldZones.constBegin(); it != oldZones.constEnd(); ++it)
{
if (newZones.indexOf(it.key()) < 0)
remove(it.value());
}
}
}