QTimeZone - Add TZ File Backend

Add a backend for TZ Files.

If available uses ICU for the display names and  translations, otherwise
the abbreviation is used.

Change-Id: I58c777462810b1a76ea7bd95886836b70b8a3db5
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This commit is contained in:
John Layt 2013-02-19 11:33:16 +00:00 committed by The Qt Project
parent 9c2cbee2b1
commit 8dfaf91038
5 changed files with 1144 additions and 3 deletions

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@ -52,21 +52,41 @@ QT_BEGIN_NAMESPACE
// Create default time zone using appropriate backend
static QTimeZonePrivate *newBackendTimeZone()
{
#if defined QT_USE_ICU
#ifdef QT_NO_SYSTEMLOCALE
#ifdef QT_USE_ICU
return new QIcuTimeZonePrivate();
#else
return new QUtcTimeZonePrivate();
#endif // QT_USE_ICU
#else
#if defined Q_OS_UNIX && !defined Q_OS_MAC
return new QTzTimeZonePrivate();
#elif defined QT_USE_ICU
return new QIcuTimeZonePrivate();
#else
return new QUtcTimeZonePrivate();
#endif // System Locales
#endif // QT_NO_SYSTEMLOCALE
}
// Create named time zone using appropriate backend
static QTimeZonePrivate *newBackendTimeZone(const QByteArray &olsenId)
{
#if defined QT_USE_ICU
#ifdef QT_NO_SYSTEMLOCALE
#ifdef QT_USE_ICU
return new QIcuTimeZonePrivate(olsenId);
#else
return new QUtcTimeZonePrivate(olsenId);
#endif // QT_USE_ICU
#else
#if defined Q_OS_UNIX && !defined Q_OS_MAC
return new QTzTimeZonePrivate(olsenId);
#elif defined QT_USE_ICU
return new QIcuTimeZonePrivate(olsenId);
#else
return new QUtcTimeZonePrivate(olsenId);
#endif // System Locales
#endif // QT_NO_SYSTEMLOCALE
}
class QTimeZoneSingleton

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@ -240,6 +240,72 @@ private:
};
#endif // QT_USE_ICU
#if defined Q_OS_UNIX && !defined Q_OS_MAC
class Q_AUTOTEST_EXPORT QTzTimeZonePrivate Q_DECL_FINAL : public QTimeZonePrivate
{
public:
// Create default time zone
QTzTimeZonePrivate();
// Create named time zone
QTzTimeZonePrivate(const QByteArray &olsenId);
QTzTimeZonePrivate(const QTzTimeZonePrivate &other);
~QTzTimeZonePrivate();
QTimeZonePrivate *clone();
QLocale::Country country() const Q_DECL_OVERRIDE;
QString comment() const Q_DECL_OVERRIDE;
QString displayName(qint64 atMSecsSinceEpoch,
QTimeZone::NameType nameType,
const QLocale &locale) const Q_DECL_OVERRIDE;
QString displayName(QTimeZone::TimeType timeType,
QTimeZone::NameType nameType,
const QLocale &locale) const Q_DECL_OVERRIDE;
QString abbreviation(qint64 atMSecsSinceEpoch) const Q_DECL_OVERRIDE;
int offsetFromUtc(qint64 atMSecsSinceEpoch) const Q_DECL_OVERRIDE;
int standardTimeOffset(qint64 atMSecsSinceEpoch) const Q_DECL_OVERRIDE;
int daylightTimeOffset(qint64 atMSecsSinceEpoch) const Q_DECL_OVERRIDE;
bool hasDaylightTime() const Q_DECL_OVERRIDE;
bool isDaylightTime(qint64 atMSecsSinceEpoch) const Q_DECL_OVERRIDE;
Data data(qint64 forMSecsSinceEpoch) const Q_DECL_OVERRIDE;
bool hasTransitions() const Q_DECL_OVERRIDE;
Data nextTransition(qint64 afterMSecsSinceEpoch) const Q_DECL_OVERRIDE;
Data previousTransition(qint64 beforeMSecsSinceEpoch) const Q_DECL_OVERRIDE;
QByteArray systemTimeZoneId() const Q_DECL_OVERRIDE;
QSet<QByteArray> availableTimeZoneIds() const Q_DECL_OVERRIDE;
QSet<QByteArray> availableTimeZoneIds(QLocale::Country country) const Q_DECL_OVERRIDE;
private:
void init(const QByteArray &olsenId);
struct QTzTransitionTime {
qint64 atMSecsSinceEpoch;
quint8 ruleIndex;
};
struct QTzTransitionRule {
int stdOffset;
int dstOffset;
quint8 abbreviationIndex;
bool operator==(const QTzTransitionRule &other) { return (stdOffset == other.stdOffset
&& dstOffset == other.dstOffset && abbreviationIndex == other.abbreviationIndex); }
};
QList<QTzTransitionTime> m_tranTimes;
QList<QTzTransitionRule> m_tranRules;
QList<QByteArray> m_abbreviations;
#ifdef QT_USE_ICU
mutable QSharedDataPointer<QTimeZonePrivate> m_icu;
#endif // QT_USE_ICU
QByteArray m_posixRule;
};
#endif // Q_OS_UNIX
QT_END_NAMESPACE
#endif // QTIMEZONEPRIVATE_P_H

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@ -0,0 +1,917 @@
/****************************************************************************
**
** Copyright (C) 2013 John Layt <jlayt@kde.org>
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qtimezone.h"
#include "qtimezoneprivate_p.h"
#include <QtCore/QFile>
#include <QtCore/QHash>
#include <QtCore/QDateTime>
#include <qdebug.h>
QT_BEGIN_NAMESPACE
/*
Private
tz file implementation
*/
struct QTzTimeZone {
QLocale::Country country;
QByteArray comment;
};
// Define as a type as Q_GLOBAL_STATIC doesn't like it
typedef QHash<QByteArray, QTzTimeZone> QTzTimeZoneHash;
// Parse zone.tab table, assume lists all installed zones, if not will need to read directories
static QTzTimeZoneHash loadTzTimeZones()
{
QString path = QStringLiteral("/usr/share/zoneinfo/zone.tab");
if (!QFile::exists(path))
path = QStringLiteral("/usr/lib/zoneinfo/zone.tab");
QFile tzif(path);
if (!tzif.open(QIODevice::ReadOnly))
return QTzTimeZoneHash();
QTzTimeZoneHash zonesHash;
// TODO QTextStream inefficient, replace later
QTextStream ts(&tzif);
while (!ts.atEnd()) {
const QString line = ts.readLine();
// Comment lines are prefixed with a #
if (!line.isEmpty() && line.at(0) != '#') {
// Data rows are tab-separated columns Region, Coordinates, ID, Optional Comments
const QStringList parts = line.split('\t');
QTzTimeZone zone;
zone.country = QLocalePrivate::codeToCountry(parts.at(0));
if (parts.size() > 3)
zone.comment = parts.at(3).toUtf8();
zonesHash.insert(parts.at(2).toUtf8(), zone);
}
}
return zonesHash;
}
// Hash of available system tz files as loaded by loadTzTimeZones()
Q_GLOBAL_STATIC_WITH_ARGS(const QTzTimeZoneHash, tzZones, (loadTzTimeZones()));
/*
The following is copied and modified from tzfile.h which is in the public domain.
Copied as no compatibility guarantee and is never system installed.
See https://github.com/eggert/tz/blob/master/tzfile.h
*/
#define TZ_MAGIC "TZif"
#define TZ_MAX_TIMES 1200
#define TZ_MAX_TYPES 256 // Limited by what (unsigned char)'s can hold
#define TZ_MAX_CHARS 50 // Maximum number of abbreviation characters
#define TZ_MAX_LEAPS 50 // Maximum number of leap second corrections
struct QTzHeader {
char tzh_magic[4]; // TZ_MAGIC
char tzh_version; // '\0' or '2' as of 2005
char tzh_reserved[15]; // reserved--must be zero
quint32 tzh_ttisgmtcnt; // number of trans. time flags
quint32 tzh_ttisstdcnt; // number of trans. time flags
quint32 tzh_leapcnt; // number of leap seconds
quint32 tzh_timecnt; // number of transition times
quint32 tzh_typecnt; // number of local time types
quint32 tzh_charcnt; // number of abbr. chars
};
struct QTzTransition {
qint64 tz_time; // Transition time
quint8 tz_typeind; // Type Index
};
struct QTzType {
int tz_gmtoff; // UTC offset in seconds
bool tz_isdst; // Is DST
quint8 tz_abbrind; // abbreviation list index
bool tz_ttisgmt; // Is in UTC time
bool tz_ttisstd; // Is in Standard time
};
// TZ File parsing
static QTzHeader parseTzHeader(QDataStream &ds, bool *ok)
{
QTzHeader hdr;
quint8 ch;
*ok = false;
// Parse Magic, 4 bytes
ds.readRawData(hdr.tzh_magic, 4);
if (memcmp(hdr.tzh_magic, TZ_MAGIC, 4) != 0 || ds.status() != QDataStream::Ok)
return hdr;
// Parse Version, 1 byte, before 2005 was '\0', since 2005 a '2'
ds >> ch;
hdr.tzh_version = ch;
if (ds.status() != QDataStream::Ok || (hdr.tzh_version != '2' && hdr.tzh_version != '\0'))
return hdr;
// Parse reserved space, 15 bytes
ds.readRawData(hdr.tzh_reserved, 15);
if (ds.status() != QDataStream::Ok)
return hdr;
// Parse rest of header, 6 x 4-byte transition counts
ds >> hdr.tzh_ttisgmtcnt >> hdr.tzh_ttisstdcnt >> hdr.tzh_leapcnt >> hdr.tzh_timecnt
>> hdr.tzh_typecnt >> hdr.tzh_charcnt;
// Check defined maximums
if (ds.status() != QDataStream::Ok
|| hdr.tzh_timecnt > TZ_MAX_TIMES
|| hdr.tzh_typecnt > TZ_MAX_TYPES
|| hdr.tzh_charcnt > TZ_MAX_CHARS
|| hdr.tzh_leapcnt > TZ_MAX_LEAPS
|| hdr.tzh_ttisgmtcnt > hdr.tzh_typecnt
|| hdr.tzh_ttisstdcnt > hdr.tzh_typecnt) {
return hdr;
}
*ok = true;
return hdr;
}
static QList<QTzTransition> parseTzTransitions(QDataStream &ds, int tzh_timecnt, bool longTran)
{
QList<QTzTransition> tranList;
if (longTran) {
// Parse tzh_timecnt x 8-byte transition times
for (int i = 0; i < tzh_timecnt && ds.status() == QDataStream::Ok; ++i) {
QTzTransition tran;
ds >> tran.tz_time;
if (ds.status() == QDataStream::Ok)
tranList.append(tran);
}
} else {
// Parse tzh_timecnt x 4-byte transition times
int val;
for (int i = 0; i < tzh_timecnt && ds.status() == QDataStream::Ok; ++i) {
QTzTransition tran;
ds >> val;
tran.tz_time = val;
if (ds.status() == QDataStream::Ok)
tranList.append(tran);
}
}
// Parse tzh_timecnt x 1-byte transition type index
for (int i = 0; i < tzh_timecnt && ds.status() == QDataStream::Ok; ++i) {
quint8 typeind;
ds >> typeind;
if (ds.status() == QDataStream::Ok)
tranList[i].tz_typeind = typeind;
}
return tranList;
}
static QList<QTzType> parseTzTypes(QDataStream &ds, int tzh_typecnt)
{
QList<QTzType> typeList;
// Parse tzh_typecnt x transition types
for (int i = 0; i < tzh_typecnt && ds.status() == QDataStream::Ok; ++i) {
QTzType type;
// Parse UTC Offset, 4 bytes
ds >> type.tz_gmtoff;
// Parse Is DST flag, 1 byte
if (ds.status() == QDataStream::Ok)
ds >> type.tz_isdst;
// Parse Abbreviation Array Index, 1 byte
if (ds.status() == QDataStream::Ok)
ds >> type.tz_abbrind;
// Set defaults in case not populated later
type.tz_ttisgmt = false;
type.tz_ttisstd = false;
if (ds.status() == QDataStream::Ok)
typeList.append(type);
}
return typeList;
}
static QMap<int, QByteArray> parseTzAbbreviations(QDataStream &ds, int tzh_charcnt)
{
// Parse the abbreviation list which is tzh_charcnt long with '\0' separated strings. The
// tz_abbrind index points to the first char of the abbreviation in the array, not the
// occurrence in the list. By parsing char at a time we can track the char index and convert
// to an occurrence index. By using a map with tz_abbrind as ordered key we get both index
// methods in one data structure and can convert the types afterwards.
QMap<int, QByteArray> map;
quint8 ch;
QByteArray abbrev;
// Track the start position of each abbreviation
int tz_abbrind = 0;
for (int i = 0; i < tzh_charcnt && ds.status() == QDataStream::Ok; ++i) {
ds >> ch;
if (ds.status() == QDataStream::Ok) {
if (ch == '\0') {
// Have reached end of an abbreviation, so add to map
map[tz_abbrind] = abbrev;
tz_abbrind = i + 1;
abbrev.clear();
} else {
abbrev.append((char)ch);
}
}
}
return map;
}
static void parseTzLeapSeconds(QDataStream &ds, int tzh_leapcnt, bool longTran)
{
// Parse tzh_leapcnt x pairs of leap seconds
// We don't use leap seconds, so only read and don't store
qint64 val;
if (longTran) {
qint64 time;
for (int i = 0; i < tzh_leapcnt && ds.status() == QDataStream::Ok; ++i) {
// Parse Leap Occurrence Time, 8 bytes
ds >> time;
// Parse Leap Seconds To Apply, 4 bytes
if (ds.status() == QDataStream::Ok)
ds >> val;
}
} else {
for (int i = 0; i < tzh_leapcnt && ds.status() == QDataStream::Ok; ++i) {
// Parse Leap Occurrence Time, 4 bytes
ds >> val;
// Parse Leap Seconds To Apply, 4 bytes
if (ds.status() == QDataStream::Ok)
ds >> val;
}
}
}
static QList<QTzType> parseTzIndicators(QDataStream &ds, const QList<QTzType> &typeList, int tzh_ttisstdcnt, int tzh_ttisgmtcnt)
{
QList<QTzType> list = typeList;
bool temp;
// Parse tzh_ttisstdcnt x 1-byte standard/wall indicators
for (int i = 0; i < tzh_ttisstdcnt && ds.status() == QDataStream::Ok; ++i) {
ds >> temp;
if (ds.status() == QDataStream::Ok)
list[i].tz_ttisstd = temp;
}
// Parse tzh_ttisgmtcnt x 1-byte UTC/local indicators
for (int i = 0; i < tzh_ttisgmtcnt && ds.status() == QDataStream::Ok; ++i) {
ds >> temp;
if (ds.status() == QDataStream::Ok)
list[i].tz_ttisgmt = temp;
}
return list;
}
static QByteArray parseTzPosixRule(QDataStream &ds)
{
// Parse POSIX rule, variable length '\n' enclosed
QByteArray rule;
quint8 ch;
ds >> ch;
if (ch != '\n' || ds.status() != QDataStream::Ok)
return rule;
ds >> ch;
while (ch != '\n' && ds.status() == QDataStream::Ok) {
rule.append((char)ch);
ds >> ch;
}
return rule;
}
static QDate calculateDowDate(int year, int month, int dayOfWeek, int week)
{
QDate date(year, month, 1);
int startDow = date.dayOfWeek();
if (startDow <= dayOfWeek)
date = date.addDays(dayOfWeek - startDow - 7);
else
date = date.addDays(dayOfWeek - startDow);
date = date.addDays(week * 7);
while (date.month() != month)
date = date.addDays(-7);
return date;
}
static QDate calculatePosixDate(const QByteArray dateRule, int year)
{
// Can start with M, J, or a digit
if (dateRule.at(0) == 'M') {
// nth week in month format "Mmonth.week.dow"
QList<QByteArray> dateParts = dateRule.split('.');
int month = dateParts.at(0).mid(1).toInt();
int week = dateParts.at(1).toInt();
int dow = dateParts.at(2).toInt();
if (dow == 0)
++dow;
return calculateDowDate(year, month, dow, week);
} else if (dateRule.at(0) == 'J') {
// Day of Year ignores Feb 29
int doy = dateRule.mid(1).toInt();
QDate date = QDate(year, 1, 1).addDays(doy - 1);
if (QDate::isLeapYear(date.year()))
date = date.addDays(-1);
return date;
} else {
// Day of Year includes Feb 29
int doy = dateRule.toInt();
return QDate(year, 1, 1).addDays(doy - 1);
}
}
static QTime parsePosixTime(const QByteArray timeRule)
{
// Format "HH:mm:ss", put check parts count just in case
QList<QByteArray> parts = timeRule.split(':');
int count = parts.count();
if (count == 3)
return QTime(parts.at(0).toInt(), parts.at(1).toInt(), parts.at(2).toInt());
else if (count == 2)
return QTime(parts.at(0).toInt(), parts.at(1).toInt(), 0);
else if (count == 1)
return QTime(parts.at(0).toInt(), 0, 0);
return QTime(2, 0, 0);
}
static int parsePosixOffset(const QByteArray timeRule)
{
// Format "[+|-]hh[:mm[:ss]]"
QList<QByteArray> parts = timeRule.split(':');
int count = parts.count();
if (count == 3)
return (parts.at(0).toInt() * -60 * 60) + (parts.at(1).toInt() * 60) + parts.at(2).toInt();
else if (count == 2)
return (parts.at(0).toInt() * -60 * 60) + (parts.at(1).toInt() * 60);
else if (count == 1)
return (parts.at(0).toInt() * -60 * 60);
return 0;
}
static QList<QTimeZonePrivate::Data> calculatePosixTransitions(const QByteArray &posixRule, int startYear, int endYear)
{
QList<QTimeZonePrivate::Data> list;
// Limit year by qint64 max size for msecs
if (startYear > 292278994)
startYear = 292278994;
if (endYear > 292278994)
endYear = 292278994;
// POSIX Format is like "TZ=CST6CDT,M3.2.0/2:00:00,M11.1.0/2:00:00"
// i.e. "std offset dst [offset],start[/time],end[/time]"
// See http://www.gnu.org/software/libc/manual/html_node/TZ-Variable.html
QList<QByteArray> parts = posixRule.split(',');
QString name = QString::fromUtf8(parts.at(0));
QString stdName;
QString stdOffsetString;
QString dstName;
QString dstOffsetString;
bool parsedStdName = false;
bool parsedStdOffset = false;
for (int i = 0; i < name.size(); ++i) {
if (name.at(i).isLetter()) {
if (parsedStdName) {
parsedStdOffset = true;
dstName.append(name.at(i));
} else {
stdName.append(name.at(i));
}
} else {
parsedStdName = true;
if (parsedStdOffset)
dstOffsetString.append(name.at(i));
else
stdOffsetString.append(name.at(i));
}
}
int utcOffset = parsePosixOffset(stdOffsetString.toUtf8());
// If only the name part then no transitions
if (parts.count() == 1) {
QTimeZonePrivate::Data data;
data.atMSecsSinceEpoch = 0;
data.offsetFromUtc = utcOffset;
data.standardTimeOffset = utcOffset;
data.daylightTimeOffset = 0;
data.abbreviation = stdName;
}
// If not populated the total dst offset is 1 hour
int dstOffset = utcOffset + (60 * 60);
if (!dstOffsetString.isEmpty())
dstOffset = parsePosixOffset(dstOffsetString.toUtf8());
// Get the std to dst transtion details
QList<QByteArray> dstParts = parts.at(1).split('/');
QByteArray dstDateRule = dstParts.at(0);
QTime dstTime;
if (dstParts.count() > 1)
dstTime = parsePosixTime(dstParts.at(1));
else
dstTime = QTime(2, 0, 0);
// Get the dst to std transtion details
QList<QByteArray> stdParts = parts.at(2).split('/');
QByteArray stdDateRule = stdParts.at(0);
QTime stdTime;
if (stdParts.count() > 1)
stdTime = parsePosixTime(stdParts.at(1));
else
stdTime = QTime(2, 0, 0);
for (int year = startYear; year <= endYear; ++year) {
QTimeZonePrivate::Data dstData;
QDateTime dst(calculatePosixDate(dstDateRule, year), dstTime, Qt::UTC);
dstData.atMSecsSinceEpoch = dst.toMSecsSinceEpoch() - (utcOffset * 1000);
dstData.offsetFromUtc = dstOffset;
dstData.standardTimeOffset = utcOffset;
dstData.daylightTimeOffset = dstOffset - utcOffset;
dstData.abbreviation = dstName;
QTimeZonePrivate::Data stdData;
QDateTime std(calculatePosixDate(stdDateRule, year), stdTime, Qt::UTC);
stdData.atMSecsSinceEpoch = std.toMSecsSinceEpoch() - (dstOffset * 1000);
stdData.offsetFromUtc = utcOffset;
stdData.standardTimeOffset = utcOffset;
stdData.daylightTimeOffset = 0;
stdData.abbreviation = stdName;
// Part of the high year will overflow
if (year == 292278994 && (dstData.atMSecsSinceEpoch < 0 || stdData.atMSecsSinceEpoch < 0)) {
if (dstData.atMSecsSinceEpoch > 0) {
list << dstData;
} else if (stdData.atMSecsSinceEpoch > 0) {
list << stdData;
}
} else if (dst < std) {
list << dstData << stdData;
} else {
list << stdData << dstData;
}
}
return list;
}
// Create the system default time zone
QTzTimeZonePrivate::QTzTimeZonePrivate()
#ifdef QT_USE_ICU
: m_icu(0)
#endif // QT_USE_ICU
{
init(systemTimeZoneId());
}
// Create a named time zone
QTzTimeZonePrivate::QTzTimeZonePrivate(const QByteArray &olsenId)
#ifdef QT_USE_ICU
: m_icu(0)
#endif // QT_USE_ICU
{
init(olsenId);
}
QTzTimeZonePrivate::QTzTimeZonePrivate(const QTzTimeZonePrivate &other)
: QTimeZonePrivate(other), m_tranTimes(other.m_tranTimes),
m_tranRules(other.m_tranRules), m_abbreviations(other.m_abbreviations),
#ifdef QT_USE_ICU
m_icu(other.m_icu),
#endif // QT_USE_ICU
m_posixRule(other.m_posixRule)
{
}
QTzTimeZonePrivate::~QTzTimeZonePrivate()
{
}
QTimeZonePrivate *QTzTimeZonePrivate::clone()
{
return new QTzTimeZonePrivate(*this);
}
void QTzTimeZonePrivate::init(const QByteArray &olsenId)
{
QFile tzif;
if (olsenId.isEmpty()) {
// Open system tz
tzif.setFileName(QStringLiteral("/etc/localtime"));
if (!tzif.open(QIODevice::ReadOnly))
return;
} else {
// Open named tz, try modern path first, if fails try legacy path
tzif.setFileName(QLatin1String("/usr/share/zoneinfo/") + QString::fromLocal8Bit(olsenId));
if (!tzif.open(QIODevice::ReadOnly)) {
tzif.setFileName(QLatin1String("/usr/lib/zoneinfo/") + QString::fromLocal8Bit(olsenId));
if (!tzif.open(QIODevice::ReadOnly))
return;
}
}
QDataStream ds(&tzif);
// Parse the old version block of data
bool ok = false;
QTzHeader hdr = parseTzHeader(ds, &ok);
if (!ok || ds.status() != QDataStream::Ok)
return;
QList<QTzTransition> tranList = parseTzTransitions(ds, hdr.tzh_timecnt, false);
if (ds.status() != QDataStream::Ok)
return;
QList<QTzType> typeList = parseTzTypes(ds, hdr.tzh_typecnt);
if (ds.status() != QDataStream::Ok)
return;
QMap<int, QByteArray> abbrevMap = parseTzAbbreviations(ds, hdr.tzh_charcnt);
if (ds.status() != QDataStream::Ok)
return;
parseTzLeapSeconds(ds, hdr.tzh_leapcnt, false);
if (ds.status() != QDataStream::Ok)
return;
typeList = parseTzIndicators(ds, typeList, hdr.tzh_ttisstdcnt, hdr.tzh_ttisgmtcnt);
if (ds.status() != QDataStream::Ok)
return;
// If version 2 then parse the second block of data
if (hdr.tzh_version == '2') {
ok = false;
QTzHeader hdr2 = parseTzHeader(ds, &ok);
if (!ok || ds.status() != QDataStream::Ok)
return;
tranList = parseTzTransitions(ds, hdr2.tzh_timecnt, true);
if (ds.status() != QDataStream::Ok)
return;
typeList = parseTzTypes(ds, hdr2.tzh_typecnt);
if (ds.status() != QDataStream::Ok)
return;
abbrevMap = parseTzAbbreviations(ds, hdr2.tzh_charcnt);
if (ds.status() != QDataStream::Ok)
return;
parseTzLeapSeconds(ds, hdr2.tzh_leapcnt, true);
if (ds.status() != QDataStream::Ok)
return;
typeList = parseTzIndicators(ds, typeList, hdr2.tzh_ttisstdcnt, hdr2.tzh_ttisgmtcnt);
if (ds.status() != QDataStream::Ok)
return;
m_posixRule = parseTzPosixRule(ds);
if (ds.status() != QDataStream::Ok)
return;
}
// Translate the TZ file into internal format
// Translate the array index based tz_abbrind into list index
m_abbreviations = abbrevMap.values();
QList<int> abbrindList = abbrevMap.keys();
for (int i = 0; i < typeList.size(); ++i)
typeList[i].tz_abbrind = abbrindList.indexOf(typeList.at(i).tz_abbrind);
// Offsets are stored as total offset, want to know separate UTC and DST offsets
// so find the first non-dst transition to use as base UTC Offset
int utcOffset;
foreach (const QTzTransition &tran, tranList) {
if (!typeList.at(tran.tz_typeind).tz_isdst) {
utcOffset = typeList.at(tran.tz_typeind).tz_gmtoff;
break;
}
}
// Now for each transition time calculate our rule and save them
foreach (const QTzTransition &tz_tran, tranList) {
QTzTransitionTime tran;
QTzTransitionRule rule;
const QTzType tz_type = typeList.at(tz_tran.tz_typeind);
// Calculate the associated Rule
if (!tz_type.tz_isdst)
utcOffset = tz_type.tz_gmtoff;
rule.stdOffset = utcOffset;
rule.dstOffset = tz_type.tz_gmtoff - utcOffset;
rule.abbreviationIndex = tz_type.tz_abbrind;
// If the rule already exist then use that, otherwise add it
int ruleIndex = m_tranRules.indexOf(rule);
if (ruleIndex == -1) {
m_tranRules.append(rule);
tran.ruleIndex = m_tranRules.size() - 1;
} else {
tran.ruleIndex = ruleIndex;
}
// TODO convert to UTC if not in UTC
if (tz_type.tz_ttisgmt)
tran.atMSecsSinceEpoch = tz_tran.tz_time * 1000;
else if (tz_type.tz_ttisstd)
tran.atMSecsSinceEpoch = tz_tran.tz_time * 1000;
else
tran.atMSecsSinceEpoch = tz_tran.tz_time * 1000;
m_tranTimes.append(tran);
}
if (olsenId.isEmpty())
m_id = systemTimeZoneId();
else
m_id = olsenId;
}
QLocale::Country QTzTimeZonePrivate::country() const
{
return tzZones->value(m_id).country;
}
QString QTzTimeZonePrivate::comment() const
{
return QString::fromUtf8(tzZones->value(m_id).comment);
}
QString QTzTimeZonePrivate::displayName(qint64 atMSecsSinceEpoch,
QTimeZone::NameType nameType,
const QLocale &locale) const
{
#ifdef QT_USE_ICU
if (!m_icu)
m_icu = new QIcuTimeZonePrivate(m_id);
// TODO small risk may not match if tran times differ due to outdated files
return m_icu->displayName(atMSecsSinceEpoch, nameType, locale);
#else
Q_UNUSED(nameType)
Q_UNUSED(locale)
return abbreviation(atMSecsSinceEpoch);
#endif // QT_USE_ICU
}
QString QTzTimeZonePrivate::displayName(QTimeZone::TimeType timeType,
QTimeZone::NameType nameType,
const QLocale &locale) const
{
#ifdef QT_USE_ICU
if (!m_icu)
m_icu = new QIcuTimeZonePrivate(m_id);
// TODO small risk may not match if tran times differ due to outdated files
return m_icu->displayName(timeType, nameType, locale);
#else
Q_UNUSED(timeType)
Q_UNUSED(nameType)
Q_UNUSED(locale)
const int atMSecsSinceEpoch = QDateTime::currentMSecsSinceEpoch();
QTimeZonePrivate::Data tran = data(atMSecsSinceEpoch);
while ((timeType == QTimeZone::StandardTime && tran.daylightTimeOffset != 0)
|| (timeType == QTimeZone::DaylightTime && tran.daylightTimeOffset == 0)) {
tran = nextTransition(tran.atMSecsSinceEpoch);
}
return tran.abbreviation;
#endif // QT_USE_ICU
}
QString QTzTimeZonePrivate::abbreviation(qint64 atMSecsSinceEpoch) const
{
return data(atMSecsSinceEpoch).abbreviation;
}
int QTzTimeZonePrivate::offsetFromUtc(qint64 atMSecsSinceEpoch) const
{
const QTimeZonePrivate::Data tran = data(atMSecsSinceEpoch);
return tran.standardTimeOffset + tran.daylightTimeOffset;
}
int QTzTimeZonePrivate::standardTimeOffset(qint64 atMSecsSinceEpoch) const
{
return data(atMSecsSinceEpoch).standardTimeOffset;
}
int QTzTimeZonePrivate::daylightTimeOffset(qint64 atMSecsSinceEpoch) const
{
return data(atMSecsSinceEpoch).daylightTimeOffset;
}
bool QTzTimeZonePrivate::hasDaylightTime() const
{
// TODO Perhaps cache as frequently accessed?
foreach (const QTzTransitionRule &rule, m_tranRules) {
if (rule.dstOffset != 0)
return true;
}
return false;
}
bool QTzTimeZonePrivate::isDaylightTime(qint64 atMSecsSinceEpoch) const
{
return (daylightTimeOffset(atMSecsSinceEpoch) != 0);
}
QTimeZonePrivate::Data QTzTimeZonePrivate::data(qint64 forMSecsSinceEpoch) const
{
QTimeZonePrivate::Data data = invalidData();
int lastTran = m_tranTimes.size() - 1;
int tran;
for (tran = lastTran; tran > 0; --tran) {
if (m_tranTimes.at(tran).atMSecsSinceEpoch <= forMSecsSinceEpoch)
break;
}
// If after the last transition time then we need to use the posix rule if available
if (tran >= lastTran && !m_posixRule.isEmpty()) {
QDateTime dt = QDateTime::fromMSecsSinceEpoch(forMSecsSinceEpoch);
int year = dt.date().year();
QList<QTimeZonePrivate::Data> posixTrans = calculatePosixTransitions(m_posixRule, year - 1, year + 1);
for (int i = posixTrans.size() - 1; i > 0; --i) {
if (posixTrans.at(i).atMSecsSinceEpoch <= forMSecsSinceEpoch) {
data = posixTrans.at(i);
data.atMSecsSinceEpoch = forMSecsSinceEpoch;
return data;
}
}
}
data.atMSecsSinceEpoch = forMSecsSinceEpoch;
QTzTransitionRule rule = m_tranRules.at(m_tranTimes.at(tran).ruleIndex);
data.standardTimeOffset = rule.stdOffset;
data.daylightTimeOffset = rule.dstOffset;
data.offsetFromUtc = rule.stdOffset + rule.dstOffset;
data.abbreviation = QString::fromUtf8(m_abbreviations.at(rule.abbreviationIndex));
return data;
}
bool QTzTimeZonePrivate::hasTransitions() const
{
return true;
}
QTimeZonePrivate::Data QTzTimeZonePrivate::nextTransition(qint64 afterMSecsSinceEpoch) const
{
int lastTran = m_tranTimes.size() - 1;
int tran;
for (tran = 0; tran < lastTran; ++tran) {
if (m_tranTimes.at(tran).atMSecsSinceEpoch > afterMSecsSinceEpoch)
break;
}
// If after the last transition time then we need to use the posix rule if available
if (tran >= lastTran && !m_posixRule.isEmpty()) {
QDateTime dt = QDateTime::fromMSecsSinceEpoch(afterMSecsSinceEpoch);
int year = dt.date().year();
QList<QTimeZonePrivate::Data> posixTrans = calculatePosixTransitions(m_posixRule, year - 1, year + 1);
for (int i = 0; i < posixTrans.size() - 1; ++i) {
if (posixTrans.at(i).atMSecsSinceEpoch > afterMSecsSinceEpoch)
return posixTrans.at(i);
}
}
// Otherwise use the transition we found
QTimeZonePrivate::Data data;
data.atMSecsSinceEpoch = m_tranTimes.at(tran).atMSecsSinceEpoch;
QTzTransitionRule rule = m_tranRules.at(m_tranTimes.at(tran).ruleIndex);
data.standardTimeOffset = rule.stdOffset;
data.daylightTimeOffset = rule.dstOffset;
data.offsetFromUtc = rule.stdOffset + rule.dstOffset;
data.abbreviation = QString::fromUtf8(m_abbreviations.at(rule.abbreviationIndex));
return data;
}
QTimeZonePrivate::Data QTzTimeZonePrivate::previousTransition(qint64 beforeMSecsSinceEpoch) const
{
int lastTran = m_tranTimes.size() - 1;
int tran;
for (tran = lastTran; tran > 0; --tran) {
if (m_tranTimes.at(tran).atMSecsSinceEpoch < beforeMSecsSinceEpoch)
break;
}
// If after the last transition time then we need to use the posix rule if available
if (tran >= lastTran && !m_posixRule.isEmpty()) {
QDateTime dt = QDateTime::fromMSecsSinceEpoch(beforeMSecsSinceEpoch);
int year = dt.date().year();
QList<QTimeZonePrivate::Data> posixTrans = calculatePosixTransitions(m_posixRule, year - 1, year + 1);
for (int i = posixTrans.size() - 1; i > 0; --i) {
if (posixTrans.at(i).atMSecsSinceEpoch < beforeMSecsSinceEpoch)
return posixTrans.at(i);
}
}
// Otherwise use the transition we found
QTimeZonePrivate::Data data;
data.atMSecsSinceEpoch = m_tranTimes.at(tran).atMSecsSinceEpoch;
QTzTransitionRule rule = m_tranRules.at(m_tranTimes.at(tran).ruleIndex);
data.standardTimeOffset = rule.stdOffset;
data.daylightTimeOffset = rule.dstOffset;
data.offsetFromUtc = rule.stdOffset + rule.dstOffset;
data.abbreviation = QString::fromUtf8(m_abbreviations.at(rule.abbreviationIndex));
return data;
}
// TODO Could cache the value and monitor the required files for any changes
QByteArray QTzTimeZonePrivate::systemTimeZoneId() const
{
// Check TZ env var first, if not populated try find it
QByteArray olsenId = qgetenv("TZ");
if (!olsenId.isEmpty() && olsenId.at(0) == ':')
olsenId = olsenId.mid(1);
// On Debian Etch and later /etc/localtime is real file with name held in /etc/timezone
if (olsenId.isEmpty()) {
QFile tzif(QStringLiteral("/etc/timezone"));
if (tzif.open(QIODevice::ReadOnly)) {
// TODO QTextStream inefficient, replace later
QTextStream ts(&tzif);
if (!ts.atEnd())
olsenId = ts.readLine().toUtf8();
}
}
// On other distros /etc/localtime is symlink to real file so can extract name from the path
if (olsenId.isEmpty()) {
const QString path = QFile::symLinkTarget(QStringLiteral("/etc/localtime"));
if (!path.isEmpty()) {
// /etc/localtime is a symlink to the current TZ file, so extract from path
int index = path.indexOf(QLatin1String("/zoneinfo/")) + 10;
olsenId = path.mid(index).toUtf8();
}
}
// On some Red Hat distros /etc/localtime is real file with name held in /etc/sysconfig/clock
// in a line like ZONE="Europe/Oslo" or TIMEZONE="Europe/Oslo"
if (olsenId.isEmpty()) {
QFile tzif(QStringLiteral("/etc/sysconfig/clock"));
if (tzif.open(QIODevice::ReadOnly)) {
// TODO QTextStream inefficient, replace later
QTextStream ts(&tzif);
QString line;
while (olsenId.isEmpty() && !ts.atEnd() && ts.status() == QTextStream::Ok) {
line = ts.readLine();
if (line.left(5) == QStringLiteral("ZONE=")) {
olsenId = line.mid(6, line.size() - 2).toUtf8();
} else if (line.left(9) == QStringLiteral("TIMEZONE=")) {
olsenId = line.mid(6, line.size() - 2).toUtf8();
}
}
}
}
// Give up for now and return UTC
if (olsenId.isEmpty())
olsenId = QByteArrayLiteral("UTC");
return olsenId;
}
QSet<QByteArray> QTzTimeZonePrivate::availableTimeZoneIds() const
{
return tzZones->keys().toSet();
}
QSet<QByteArray> QTzTimeZonePrivate::availableTimeZoneIds(QLocale::Country country) const
{
// TODO AnyCountry
QSet<QByteArray> set;
foreach (const QByteArray &key, tzZones->keys()) {
if (tzZones->value(key).country == country)
set << key;
}
return set;
}
QT_END_NAMESPACE

View File

@ -122,7 +122,7 @@ else:blackberry {
SOURCES += tools/qelapsedtimer_unix.cpp tools/qlocale_blackberry.cpp
HEADERS += tools/qlocale_blackberry.h
}
else:unix:SOURCES += tools/qelapsedtimer_unix.cpp tools/qlocale_unix.cpp
else:unix:SOURCES += tools/qelapsedtimer_unix.cpp tools/qlocale_unix.cpp tools/qtimezoneprivate_tz.cpp
else:win32:SOURCES += tools/qelapsedtimer_win.cpp tools/qlocale_win.cpp
else:integrity:SOURCES += tools/qelapsedtimer_unix.cpp tools/qlocale_unix.cpp
else:SOURCES += tools/qelapsedtimer_generic.cpp

View File

@ -61,6 +61,7 @@ private slots:
// Backend tests
void utcTest();
void icuTest();
void tzTest();
private:
void printTimeZone(const QTimeZone tz);
@ -552,6 +553,143 @@ void tst_QTimeZone::icuTest()
#endif // QT_USE_ICU
}
void tst_QTimeZone::tzTest()
{
#if defined QT_BUILD_INTERNAL && defined Q_OS_UNIX && !defined Q_OS_MAC
// Known datetimes
qint64 std = QDateTime(QDate(2012, 1, 1), QTime(0, 0, 0), Qt::UTC).toMSecsSinceEpoch();
qint64 dst = QDateTime(QDate(2012, 6, 1), QTime(0, 0, 0), Qt::UTC).toMSecsSinceEpoch();
// Test default constructor
QTzTimeZonePrivate tzpd;
QVERIFY(tzpd.isValid());
// Test invalid constructor
QTzTimeZonePrivate tzpi("Gondwana/Erewhon");
QCOMPARE(tzpi.isValid(), false);
// Test named constructor
QTzTimeZonePrivate tzp("Europe/Berlin");
QVERIFY(tzp.isValid());
// Test display names by type, either ICU or abbreviation only
QLocale enUS("en_US");
#ifdef QT_USE_ICU
// Only test names in debug mode, names used can vary by ICU version installed
if (debug) {
QCOMPARE(tzp.displayName(QTimeZone::StandardTime, QTimeZone::LongName, enUS),
QString("Central European Standard Time"));
QCOMPARE(tzp.displayName(QTimeZone::StandardTime, QTimeZone::ShortName, enUS),
QString("GMT+01:00"));
QCOMPARE(tzp.displayName(QTimeZone::StandardTime, QTimeZone::OffsetName, enUS),
QString("UTC+01:00"));
QCOMPARE(tzp.displayName(QTimeZone::DaylightTime, QTimeZone::LongName, enUS),
QString("Central European Summer Time"));
QCOMPARE(tzp.displayName(QTimeZone::DaylightTime, QTimeZone::ShortName, enUS),
QString("GMT+02:00"));
QCOMPARE(tzp.displayName(QTimeZone::DaylightTime, QTimeZone::OffsetName, enUS),
QString("UTC+02:00"));
// ICU C api does not support Generic Time yet, C++ api does
QCOMPARE(tzp.displayName(QTimeZone::GenericTime, QTimeZone::LongName, enUS),
QString("Central European Standard Time"));
QCOMPARE(tzp.displayName(QTimeZone::GenericTime, QTimeZone::ShortName, enUS),
QString("GMT+01:00"));
QCOMPARE(tzp.displayName(QTimeZone::GenericTime, QTimeZone::OffsetName, enUS),
QString("UTC+01:00"));
}
#else
if (debug) {
QCOMPARE(tzp.displayName(QTimeZone::StandardTime, QTimeZone::LongName, enUS),
QString("CET"));
QCOMPARE(tzp.displayName(QTimeZone::StandardTime, QTimeZone::ShortName, enUS),
QString("CET"));
QCOMPARE(tzp.displayName(QTimeZone::StandardTime, QTimeZone::OffsetName, enUS),
QString("CET"));
QCOMPARE(tzp.displayName(QTimeZone::DaylightTime, QTimeZone::LongName, enUS),
QString("CEST"));
QCOMPARE(tzp.displayName(QTimeZone::DaylightTime, QTimeZone::ShortName, enUS),
QString("CEST"));
QCOMPARE(tzp.displayName(QTimeZone::DaylightTime, QTimeZone::OffsetName, enUS),
QString("CEST"));
QCOMPARE(tzp.displayName(QTimeZone::GenericTime, QTimeZone::LongName, enUS),
QString("CET"));
QCOMPARE(tzp.displayName(QTimeZone::GenericTime, QTimeZone::ShortName, enUS),
QString("CET"));
QCOMPARE(tzp.displayName(QTimeZone::GenericTime, QTimeZone::OffsetName, enUS),
QString("CET"));
}
#endif // QT_USE_ICU
if (debug) {
// Test Abbreviations
QCOMPARE(tzp.abbreviation(std), QString("CET"));
QCOMPARE(tzp.abbreviation(dst), QString("CEST"));
}
testCetPrivate(tzp);
// Test first and last transition rule
// Warning: This could vary depending on age of TZ file!
// Test low date uses first rule found
QTimeZonePrivate::Data dat = tzp.data(-9999999999999);
QCOMPARE(dat.atMSecsSinceEpoch, (qint64)-9999999999999);
QCOMPARE(dat.standardTimeOffset, 3600);
QCOMPARE(dat.daylightTimeOffset, 0);
dat = tzp.previousTransition(-9999999999999);
QCOMPARE(dat.atMSecsSinceEpoch, (qint64)-2422054408000);
QCOMPARE(dat.standardTimeOffset, 3600);
QCOMPARE(dat.daylightTimeOffset, 0);
dat = tzp.nextTransition(-9999999999999);
QCOMPARE(dat.atMSecsSinceEpoch, (qint64)-2422054408000);
QCOMPARE(dat.standardTimeOffset, 3600);
QCOMPARE(dat.daylightTimeOffset, 0);
// Known high datetimes
qint64 stdHi = QDateTime(QDate(2100, 1, 1), QTime(0, 0, 0), Qt::UTC).toMSecsSinceEpoch();
qint64 dstHi = QDateTime(QDate(2100, 6, 1), QTime(0, 0, 0), Qt::UTC).toMSecsSinceEpoch();
// Tets high dates use the POSIX rule
dat = tzp.data(stdHi);
QCOMPARE(dat.atMSecsSinceEpoch, (qint64)stdHi);
QCOMPARE(dat.offsetFromUtc, 3600);
QCOMPARE(dat.standardTimeOffset, 3600);
QCOMPARE(dat.daylightTimeOffset, 0);
dat = tzp.data(dstHi);
QCOMPARE(dat.atMSecsSinceEpoch, (qint64)dstHi);
QCOMPARE(dat.offsetFromUtc, 7200);
QCOMPARE(dat.standardTimeOffset, 3600);
QCOMPARE(dat.daylightTimeOffset, 3600);
dat = tzp.previousTransition(stdHi);
QCOMPARE(dat.atMSecsSinceEpoch, (qint64)4096659600000);
QCOMPARE(dat.offsetFromUtc, 3600);
QCOMPARE(dat.standardTimeOffset, 3600);
QCOMPARE(dat.daylightTimeOffset, 0);
dat = tzp.previousTransition(dstHi);
QCOMPARE(dat.atMSecsSinceEpoch, (qint64)4109965200000);
QCOMPARE(dat.offsetFromUtc, 7200);
QCOMPARE(dat.standardTimeOffset, 3600);
QCOMPARE(dat.daylightTimeOffset, 3600);
dat = tzp.nextTransition(stdHi);
QCOMPARE(dat.atMSecsSinceEpoch, (qint64)4109965200000);
QCOMPARE(dat.offsetFromUtc, 7200);
QCOMPARE(dat.standardTimeOffset, 3600);
QCOMPARE(dat.daylightTimeOffset, 3600);
dat = tzp.nextTransition(dstHi);
QCOMPARE(dat.atMSecsSinceEpoch, (qint64)4128109200000);
QCOMPARE(dat.offsetFromUtc, 3600);
QCOMPARE(dat.standardTimeOffset, 3600);
QCOMPARE(dat.daylightTimeOffset, 0);
#endif // Q_OS_UNIX
}
#ifdef QT_BUILD_INTERNAL
// Test each private produces the same basic results for CET
void tst_QTimeZone::testCetPrivate(const QTimeZonePrivate &tzp)