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Diffstat (limited to 'kdecore/ktimezones.cpp')
| -rw-r--r-- | kdecore/ktimezones.cpp | 790 |
1 files changed, 0 insertions, 790 deletions
diff --git a/kdecore/ktimezones.cpp b/kdecore/ktimezones.cpp deleted file mode 100644 index dbd589d85..000000000 --- a/kdecore/ktimezones.cpp +++ /dev/null @@ -1,790 +0,0 @@ -/* - This file is part of the KDE libraries - Copyright (c) 2005 S.R.Haque <srhaque@iee.org>. - - This library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public - License version 2 as published by the Free Software Foundation. - - This library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public License - along with this library; see the file COPYING.LIB. If not, write to - the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, - Boston, MA 02110-1301, USA. -*/ - -#include <config.h> - -#include <ktimezones.h> -#include <kdebug.h> -#include <kmdcodec.h> -#include <kprocess.h> -#include <kstringhandler.h> -#include <ktempfile.h> - -#include <tqdatetime.h> -#include <tqfile.h> -#include <tqregexp.h> -#include <tqstringlist.h> -#include <tqtextstream.h> - -#include <cerrno> -#include <climits> -#include <cstdlib> -#include <cstring> -#include <ctime> - -#define UTC_ZONE "UTC" - -/** - * Find out if the given standard (e.g. "GMT") and daylight savings time - * (e.g. "BST", but which may be empty) abbreviated timezone names match - * this timezone. - * - * Thus, this class can be used as a heuristic when trying to lookup the - * real timezone from the abbreviated zone names. - */ -class AbbreviationsMatch : - public KTimezoneDetails -{ -public: - AbbreviationsMatch(const TQString &stdZone, const TQString &dstZone = "") - { - m_stdZone = stdZone; - m_dstZone = dstZone; - } - - void parseStarted() - { - m_foundStd = false; - m_foundDst = m_dstZone.isEmpty(); - } - - bool test() - { - return (m_foundStd && m_foundDst); - } - -private: - bool m_foundStd; - bool m_foundDst; - TQString m_stdZone; - TQString m_dstZone; - - virtual void gotAbbreviation(int /*index*/, const TQString &value) - { - if (m_stdZone == value) - { - m_foundStd = true; - } - if (m_dstZone == value) - { - m_foundDst = true; - } - } -}; - -/** - * Internal dummy source for UTC timezone. - */ -class DummySource : - public KTimezoneSource -{ -public: - DummySource() : - KTimezoneSource("") - { - } - - virtual bool parse(const TQString &/*zone*/, KTimezoneDetails &/*dataReceiver*/) const - { - return true; - } -}; - -/** - * Find offset at a particular point in time. - */ -class OffsetFind : - public KTimezoneDetails -{ -public: - OffsetFind(unsigned dateTime) - { - m_dateTime = dateTime; - } - - void parseStarted() - { - m_transitionTimeIndex = 0; - m_localTimeIndex = -1; - m_abbrIndex = -1; - m_offset = 0; - m_isDst = false; - m_abbr = UTC_ZONE; - } - - int offset() - { - return m_offset; - } - - bool isDst() - { - return m_isDst; - } - - TQString abbreviation() - { - return m_abbr; - } - -private: - unsigned m_dateTime; - int m_transitionTimeIndex; - int m_localTimeIndex; - int m_abbrIndex; - int m_offset; - bool m_isDst; - TQString m_abbr; - - virtual void gotTransitionTime(int index, unsigned transitionTime) - { - if (transitionTime <= m_dateTime) - { - // Remember the index of the transition time that relates to dateTime. - m_transitionTimeIndex = index; - } - } - - virtual void gotLocalTimeIndex(int index, unsigned localTimeIndex) - { - if (index == m_transitionTimeIndex) - { - // Remember the index of the local time that relates to dateTime. - m_localTimeIndex = localTimeIndex; - } - } - - virtual void gotLocalTime(int index, int gmtOff, bool isDst, unsigned abbrInd) - { - if (index == m_localTimeIndex) - { - // Remember the results that relate to gmtOffset. - m_offset = gmtOff; - m_isDst = isDst; - m_abbrIndex = abbrInd; - } - } - - virtual void gotAbbreviation(int index, const TQString &value) - { - if (index == m_abbrIndex) - { - m_abbr = value; - } - } -}; - -const float KTimezone::UNKNOWN = 1000.0; - -bool KTimezone::isValidLatitude(float latitude) -{ - return (latitude >= -90.0) && (latitude <= 90.0); -} - -bool KTimezone::isValidLongitude(float longitude) -{ - return (longitude >= -180.0) && (longitude <= 180.0); -} - -KTimezone::KTimezone( - KSharedPtr<KTimezoneSource> db, const TQString& name, - const TQString &countryCode, float latitude, float longitude, - const TQString &comment) : - m_db(db), - m_name(name), - m_countryCode(countryCode), - m_latitude(latitude), - m_longitude(longitude), - m_comment(comment), - d(0) -{ - // Detect duff values. - if (m_latitude * m_latitude > 90 * 90) - m_latitude = UNKNOWN; - if (m_longitude * m_longitude > 180 * 180) - m_longitude = UNKNOWN; -} - -KTimezone::~KTimezone() -{ - // FIXME when needed: - // delete d; -} - -TQString KTimezone::comment() const -{ - return m_comment; -} - -TQDateTime KTimezone::convert(const KTimezone *newZone, const TQDateTime &dateTime) const -{ - char *originalZone = ::getenv("TZ"); - - // Convert the given localtime to UTC. - ::setenv("TZ", m_name.utf8(), 1); - tzset(); - unsigned utc = dateTime.toTime_t(); - - // Set the timezone and convert UTC to localtime. - ::setenv("TZ", newZone->name().utf8(), 1); - tzset(); - TQDateTime remoteTime; - remoteTime.setTime_t(utc, Qt::LocalTime); - - // Now restore things - if (!originalZone) - { - ::unsetenv("TZ"); - } - else - { - ::setenv("TZ", originalZone, 1); - } - tzset(); - return remoteTime; -} - -TQString KTimezone::countryCode() const -{ - return m_countryCode; -} - -float KTimezone::latitude() const -{ - return m_latitude; -} - -float KTimezone::longitude() const -{ - return m_longitude; -} - -TQString KTimezone::name() const -{ - return m_name; -} - -int KTimezone::offset(Qt::TimeSpec basisSpec) const -{ - char *originalZone = ::getenv("TZ"); - - // Get the time in the current timezone. - TQDateTime basisTime = TQDateTime::tqcurrentDateTime(basisSpec); - - // Set the timezone and find out what time it is there compared to the basis. - ::setenv("TZ", m_name.utf8(), 1); - tzset(); - TQDateTime remoteTime = TQDateTime::tqcurrentDateTime(Qt::LocalTime); - int offset = remoteTime.secsTo(basisTime); - - // Now restore things - if (!originalZone) - { - ::unsetenv("TZ"); - } - else - { - ::setenv("TZ", originalZone, 1); - } - tzset(); - return offset; -} - -int KTimezone::offset(const TQDateTime &dateTime) const -{ - OffsetFind finder(dateTime.toTime_t()); - int result = 0; - if (parse(finder)) - { - result = finder.offset(); - } - return result; -} - -bool KTimezone::parse(KTimezoneDetails &dataReceiver) const -{ - dataReceiver.parseStarted(); - bool result = m_db->parse(m_name, dataReceiver); - dataReceiver.parseEnded(); - return result; -} - -KTimezones::KTimezones() : - m_zoneinfoDir(), - m_zones(0), - d(0) -{ - // Create the database (and resolve m_zoneinfoDir!). - allZones(); - m_UTC = new KTimezone(new DummySource(), UTC_ZONE); - add(m_UTC); -} - -KTimezones::~KTimezones() -{ - // FIXME when needed: - // delete d; - - // Autodelete behavior. - if (m_zones) - { - for (ZoneMap::ConstIterator it = m_zones->begin(); it != m_zones->end(); ++it) - { - delete it.data(); - } - } - delete m_zones; -} - -void KTimezones::add(KTimezone *zone) -{ - m_zones->insert(zone->name(), zone); -} - -const KTimezones::ZoneMap KTimezones::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. - TQFile f; - m_zoneinfoDir = "/usr/share/zoneinfo"; - f.setName(m_zoneinfoDir + "/zone.tab"); - if (!f.open(IO_ReadOnly)) - { - kdDebug() << "Can't open " << f.name() << endl; - m_zoneinfoDir = "/usr/lib/zoneinfo"; - f.setName(m_zoneinfoDir + "/zone.tab"); - if (!f.open(IO_ReadOnly)) - { - kdDebug() << "Can't open " << f.name() << endl; - m_zoneinfoDir = ::getenv("TZDIR"); - f.setName(m_zoneinfoDir + "/zone.tab"); - if (m_zoneinfoDir.isEmpty() || !f.open(IO_ReadOnly)) - { - kdDebug() << "Can't open " << f.name() << endl; - - // 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)) - { - kdDebug() << "Can't open " << f.name() << endl; - return *m_zones; - } - } - } - } - - // Parse the zone.tab. - TQTextStream str(&f); - TQRegExp lineSeparator("[ \t]"); - TQRegExp ordinateSeparator("[+-]"); - KSharedPtr<KTimezoneSource> db(new KTimezoneSource(m_zoneinfoDir)); - while (!str.atEnd()) - { - TQString line = str.readLine(); - if (line.isEmpty() || '#' == line[0]) - continue; - TQStringList tokens = KStringHandler::perlSplit(lineSeparator, line, 4); - if (tokens.count() < 3) - { - kdError() << "invalid record: " << line << endl; - continue; - } - - // Got three tokens. Now check for two ordinates plus first one is "". - TQStringList ordinates = KStringHandler::perlSplit(ordinateSeparator, tokens[1], 2); - if (ordinates.count() < 2) - { - kdError() << "invalid coordinates: " << tokens[1] << endl; - continue; - } - - float latitude = convertCoordinate(ordinates[1]); - float longitude = convertCoordinate(ordinates[2]); - - // Add entry to list. - if (tokens[0] == "??") - tokens[0] = ""; - KTimezone *timezone = new KTimezone(db, tokens[2], tokens[0], latitude, longitude, tokens[3]); - add(timezone); - } - f.close(); - return *m_zones; -} - -/** - * Convert sHHMM or sHHMMSS to a floating point number of degrees. - */ -float KTimezones::convertCoordinate(const TQString &coordinate) -{ - int value = coordinate.toInt(); - int degrees = 0; - int minutes = 0; - int seconds = 0; - - if (coordinate.length() > 11) - { - degrees = value / 10000; - value -= degrees * 10000; - minutes = value / 100; - value -= minutes * 100; - seconds = value; - } - else - { - degrees = value / 100; - value -= degrees * 100; - minutes = value; - } - value = degrees * 3600 + minutes * 60 + seconds; - return value / 3600.0; -} - -const KTimezone *KTimezones::local() -{ - const KTimezone *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. - TQFile f; - f.setName("/etc/localtime"); - if (f.open(IO_ReadOnly)) - { - // Compute the MD5 sum of /etc/localtime. - KMD5 context(""); - context.reset(); - context.update(TQT_TQIODEVICE_OBJECT(f)); - TQIODevice::Offset referenceSize = f.size(); - TQString 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) - { - KTimezone *zone = it.data(); - f.setName(m_zoneinfoDir + '/' + zone->name()); - if (f.open(IO_ReadOnly)) - { - TQIODevice::Offset candidateSize = f.size(); - TQString candidateMd5Sum; - if (candidateSize == referenceSize) - { - // Only do the heavy lifting for file sizes which match. - context.reset(); - context.update(TQT_TQIODEVICE_OBJECT(f)); - candidateMd5Sum = context.hexDigest(); - } - f.close(); - if (candidateMd5Sum == referenceMd5Sum) - { - // kdError() << "local=" << zone->name() << endl; - local = zone; - break; - } - } - } - } - } - if (local) - return local; - - // BSD support. - TQString fileZone; - f.setName("/etc/timezone"); - if (!f.open(IO_ReadOnly)) - { - kdDebug() << "Can't open " << f.name() << endl; - - // Solaris support using /etc/default/init. - f.setName("/etc/default/init"); - if (!f.open(IO_ReadOnly)) - { - kdDebug() << "Can't open " << f.name() << endl; - } - else - { - TQTextStream ts(&f); - ts.setEncoding(TQTextStream::Latin1); - - // Read the last line starting "TZ=". - while (!ts.atEnd()) - { - fileZone = ts.readLine(); - if (fileZone.startsWith("TZ=")) - { - fileZone = fileZone.mid(3); - - // kdError() << "local=" << fileZone << endl; - local = zone(fileZone); - } - } - f.close(); - } - } - else - { - TQTextStream ts(&f); - ts.setEncoding(TQTextStream::Latin1); - - // Read the first line. - if (!ts.atEnd()) - { - fileZone = ts.readLine(); - - // kdError() << "local=" << fileZone << endl; - 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) - { - KTimezone *zone = it.data(); - int candidateOffset = QABS(zone->offset(Qt::LocalTime)); - if (zone->parse(matcher) && matcher.test() && (candidateOffset < bestOffset)) - { - // kdError() << "local=" << zone->name() << endl; - bestOffset = candidateOffset; - local = zone; - } - } - } - if (local) - return local; - return m_UTC; -} - -const KTimezone *KTimezones::zone(const TQString &name) -{ - if (name.isEmpty()) - return m_UTC; - ZoneMap::ConstIterator it = m_zones->find(name); - if (it != m_zones->end()) - return it.data(); - - // Error. - return 0; -} - -KTimezoneDetails::KTimezoneDetails() -{ -} - -KTimezoneDetails::~KTimezoneDetails() -{ -} - -void KTimezoneDetails::gotAbbreviation(int /*index*/, const TQString &) -{} - -void KTimezoneDetails::gotHeader( - unsigned, unsigned, unsigned, - unsigned, unsigned, unsigned) -{} - -void KTimezoneDetails::gotLeapAdjustment(int /*index*/, unsigned, unsigned) -{} - -void KTimezoneDetails::gotLocalTime(int /*index*/, int, bool, unsigned) -{} - -void KTimezoneDetails::gotLocalTimeIndex(int /*index*/, unsigned) -{} - -void KTimezoneDetails::gotIsStandard(int /*index*/, bool) -{} - -void KTimezoneDetails::gotTransitionTime(int /*index*/, unsigned) -{} - -void KTimezoneDetails::gotIsUTC(int /*index*/, bool) -{} - -void KTimezoneDetails::parseEnded() -{} - -void KTimezoneDetails::parseStarted() -{} - -KTimezoneSource::KTimezoneSource(const TQString &db) : - m_db(db) -{ -} - -KTimezoneSource::~KTimezoneSource() -{ -} - -TQString KTimezoneSource::db() -{ - return m_db; -} - -bool KTimezoneSource::parse(const TQString &zone, KTimezoneDetails &dataReceiver) const -{ - TQFile f(m_db + '/' + zone); - if (!f.open(IO_ReadOnly)) - { - kdError() << "Cannot open " << f.name() << endl; - return false; - } - - // Structures that represent the zoneinfo file. - TQ_UINT8 T, z, i_, f_; - struct - { - TQ_UINT32 ttisgmtcnt; - TQ_UINT32 ttisstdcnt; - TQ_UINT32 leapcnt; - TQ_UINT32 timecnt; - TQ_UINT32 typecnt; - TQ_UINT32 charcnt; - } tzh; - TQ_UINT32 transitionTime; - TQ_UINT8 localTimeIndex; - struct - { - TQ_INT32 gmtoff; - TQ_INT8 isdst; - TQ_UINT8 abbrind; - } tt; - TQ_UINT32 leapTime; - TQ_UINT32 leapSeconds; - TQ_UINT8 isStandard; - TQ_UINT8 isUTC; - - TQDataStream str(&f); - str >> T >> z >> i_ >> f_; - // kdError() << "signature: " << TQChar(T) << TQChar(z) << TQChar(i_) << TQChar(f_) << endl; - unsigned i; - for (i = 0; i < 4; i++) - str >> tzh.ttisgmtcnt; - str >> tzh.ttisgmtcnt >> tzh.ttisstdcnt >> tzh.leapcnt >> tzh.timecnt >> tzh.typecnt >> tzh.charcnt; - // kdError() << "header: " << tzh.ttisgmtcnt << ", " << tzh.ttisstdcnt << ", " << tzh.leapcnt << ", " << - // tzh.timecnt << ", " << tzh.typecnt << ", " << tzh.charcnt << endl; - dataReceiver.gotHeader(tzh.ttisgmtcnt, tzh.ttisstdcnt, tzh.leapcnt, tzh.timecnt, tzh.typecnt, tzh.charcnt); - for (i = 0; i < tzh.timecnt; i++) - { - str >> transitionTime; - dataReceiver.gotTransitionTime(i, transitionTime); - } - for (i = 0; i < tzh.timecnt; i++) - { - // NB: these appear to be 1-based, not zero-based! - str >> localTimeIndex; - dataReceiver.gotLocalTimeIndex(i, localTimeIndex); - } - for (i = 0; i < tzh.typecnt; i++) - { - str >> tt.gmtoff >> tt.isdst >> tt.abbrind; - // kdError() << "local type: " << tt.gmtoff << ", " << tt.isdst << ", " << tt.abbrind << endl; - dataReceiver.gotLocalTime(i, tt.gmtoff, (tt.isdst != 0), tt.abbrind); - } - - // Make sure we don't run foul of maliciously coded timezone abbreviations. - if (tzh.charcnt > 64) - { - kdError() << "excessive length for timezone abbreviations: " << tzh.charcnt << endl; - return false; - } - TQByteArray array(tzh.charcnt); - str.readRawBytes(array.data(), array.size()); - char *abbrs = array.data(); - if (abbrs[tzh.charcnt - 1] != 0) - { - // These abbrevations are corrupt! - kdError() << "timezone abbreviations not terminated: " << abbrs[tzh.charcnt - 1] << endl; - return false; - } - char *abbr = abbrs; - while (abbr < abbrs + tzh.charcnt) - { - // kdError() << "abbr: " << abbr << endl; - dataReceiver.gotAbbreviation((abbr - abbrs), abbr); - abbr += strlen(abbr) + 1; - } - for (i = 0; i < tzh.leapcnt; i++) - { - str >> leapTime >> leapSeconds; - // kdError() << "leap entry: " << leapTime << ", " << leapSeconds << endl; - dataReceiver.gotLeapAdjustment(i, leapTime, leapSeconds); - } - for (i = 0; i < tzh.ttisstdcnt; i++) - { - str >> isStandard; - // kdError() << "standard: " << isStandard << endl; - dataReceiver.gotIsStandard(i, (isStandard != 0)); - } - for (i = 0; i < tzh.ttisgmtcnt; i++) - { - str >> isUTC; - // kdError() << "UTC: " << isUTC << endl; - dataReceiver.gotIsUTC(i, (isUTC != 0)); - } - return true; -} |