672 lines
24 KiB
C++
672 lines
24 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2013 John Layt <jlayt@kde.org>
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of the QtCore module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia. For licensing terms and
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** conditions see http://qt.digia.com/licensing. For further information
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** use the contact form at http://qt.digia.com/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Digia gives you certain additional
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** rights. These rights are described in the Digia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qtimezone.h"
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#include "qtimezoneprivate_p.h"
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#include "qdatetime.h"
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#include "qdebug.h"
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QT_BEGIN_NAMESPACE
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/*
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Private
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Windows system implementation
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*/
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#define MAX_KEY_LENGTH 255
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#define FILETIME_UNIX_EPOCH Q_UINT64_C(116444736000000000)
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// MSDN home page for Time support
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// http://msdn.microsoft.com/en-us/library/windows/desktop/ms724962%28v=vs.85%29.aspx
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// For Windows XP and later refer to MSDN docs on TIME_ZONE_INFORMATION structure
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// http://msdn.microsoft.com/en-gb/library/windows/desktop/ms725481%28v=vs.85%29.aspx
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// Vista introduced support for historic data, see MSDN docs on DYNAMIC_TIME_ZONE_INFORMATION
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// http://msdn.microsoft.com/en-gb/library/windows/desktop/ms724253%28v=vs.85%29.aspx
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static const char tzRegPath[] = "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Time Zones";
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static const char currTzRegPath[] = "SYSTEM\\CurrentControlSet\\Control\\TimeZoneInformation";
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enum {
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MIN_YEAR = -292275056,
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MAX_YEAR = 292278994,
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MSECS_PER_DAY = 86400000,
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TIME_T_MAX = 2145916799, // int maximum 2037-12-31T23:59:59 UTC
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JULIAN_DAY_FOR_EPOCH = 2440588 // result of julianDayFromDate(1970, 1, 1)
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};
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// Copied from MSDN, see above for link
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typedef struct _REG_TZI_FORMAT
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{
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LONG Bias;
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LONG StandardBias;
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LONG DaylightBias;
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SYSTEMTIME StandardDate;
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SYSTEMTIME DaylightDate;
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} REG_TZI_FORMAT;
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// Fast and reliable conversion from msecs to date for all values
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// Adapted from QDateTime msecsToDate
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static QDate msecsToDate(qint64 msecs)
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{
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qint64 jd = JULIAN_DAY_FOR_EPOCH;
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if (qAbs(msecs) >= MSECS_PER_DAY) {
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jd += (msecs / MSECS_PER_DAY);
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msecs %= MSECS_PER_DAY;
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}
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if (msecs < 0) {
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qint64 ds = MSECS_PER_DAY - msecs - 1;
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jd -= ds / MSECS_PER_DAY;
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}
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return QDate::fromJulianDay(jd);
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}
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static bool equalSystemtime(const SYSTEMTIME &t1, const SYSTEMTIME &t2)
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{
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return (t1.wYear == t2.wYear
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&& t1.wMonth == t2.wMonth
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&& t1.wDay == t2.wDay
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&& t1.wDayOfWeek == t2.wDayOfWeek
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&& t1.wHour == t2.wHour
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&& t1.wMinute == t2.wMinute
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&& t1.wSecond == t2.wSecond
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&& t1.wMilliseconds == t2.wMilliseconds);
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}
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static bool equalTzi(const TIME_ZONE_INFORMATION &tzi1, const TIME_ZONE_INFORMATION &tzi2)
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{
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return(tzi1.Bias == tzi2.Bias
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&& tzi1.StandardBias == tzi2.StandardBias
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&& equalSystemtime(tzi1.StandardDate, tzi2.StandardDate)
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&& wcscmp(tzi1.StandardName, tzi2.StandardName) == 0
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&& tzi1.DaylightBias == tzi2.DaylightBias
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&& equalSystemtime(tzi1.DaylightDate, tzi2.DaylightDate)
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&& wcscmp(tzi1.DaylightName, tzi2.DaylightName) == 0);
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}
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static bool openRegistryKey(const QString &keyPath, HKEY *key)
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{
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return (RegOpenKeyEx(HKEY_LOCAL_MACHINE, (const wchar_t*)keyPath.utf16(), 0, KEY_READ, key)
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== ERROR_SUCCESS);
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}
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static QString readRegistryString(const HKEY &key, const wchar_t *value)
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{
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wchar_t buffer[MAX_PATH] = {0};
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DWORD size = sizeof(wchar_t) * MAX_PATH;
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RegQueryValueEx(key, (LPCWSTR)value, NULL, NULL, (LPBYTE)buffer, &size);
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return QString::fromWCharArray(buffer);
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}
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static int readRegistryValue(const HKEY &key, const wchar_t *value)
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{
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DWORD buffer;
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DWORD size = sizeof(buffer);
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RegQueryValueEx(key, (LPCWSTR)value, NULL, NULL, (LPBYTE)&buffer, &size);
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return buffer;
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}
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static QWinTimeZonePrivate::QWinTransitionRule readRegistryRule(const HKEY &key,
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const wchar_t *value, bool *ok)
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{
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*ok = false;
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QWinTimeZonePrivate::QWinTransitionRule rule;
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REG_TZI_FORMAT tzi;
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DWORD tziSize = sizeof(tzi);
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if (RegQueryValueEx(key, (LPCWSTR)value, NULL, NULL, (BYTE *)&tzi, &tziSize)
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== ERROR_SUCCESS) {
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rule.startYear = 0;
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rule.standardTimeBias = tzi.Bias + tzi.StandardBias;
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rule.daylightTimeBias = tzi.Bias + tzi.DaylightBias - rule.standardTimeBias;
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rule.standardTimeRule = tzi.StandardDate;
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rule.daylightTimeRule = tzi.DaylightDate;
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*ok = true;
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}
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return rule;
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}
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static TIME_ZONE_INFORMATION getRegistryTzi(const QByteArray &windowsId, bool *ok)
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{
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*ok = false;
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TIME_ZONE_INFORMATION tzi;
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REG_TZI_FORMAT regTzi;
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DWORD regTziSize = sizeof(regTzi);
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HKEY key = NULL;
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const QString tziKeyPath = QString::fromUtf8(tzRegPath) + QLatin1Char('\\')
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+ QString::fromUtf8(windowsId);
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if (openRegistryKey(tziKeyPath, &key)) {
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DWORD size = sizeof(tzi.DaylightName);
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RegQueryValueEx(key, L"Dlt", NULL, NULL, (LPBYTE)tzi.DaylightName, &size);
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size = sizeof(tzi.StandardName);
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RegQueryValueEx(key, L"Std", NULL, NULL, (LPBYTE)tzi.StandardName, &size);
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if (RegQueryValueEx(key, L"TZI", NULL, NULL, (BYTE *) ®Tzi, ®TziSize)
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== ERROR_SUCCESS) {
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tzi.Bias = regTzi.Bias;
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tzi.StandardBias = regTzi.StandardBias;
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tzi.DaylightBias = regTzi.DaylightBias;
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tzi.StandardDate = regTzi.StandardDate;
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tzi.DaylightDate = regTzi.DaylightDate;
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*ok = true;
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}
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RegCloseKey(key);
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}
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return tzi;
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}
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static QList<QByteArray> availableWindowsIds()
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{
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// TODO Consider caching results in a global static, very unlikely to change.
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QList<QByteArray> list;
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HKEY key = NULL;
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if (openRegistryKey(QString::fromUtf8(tzRegPath), &key)) {
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DWORD idCount = 0;
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if (RegQueryInfoKey(key, 0, 0, 0, &idCount, 0, 0, 0, 0, 0, 0, 0) == ERROR_SUCCESS
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&& idCount > 0) {
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for (DWORD i = 0; i < idCount; ++i) {
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DWORD maxLen = MAX_KEY_LENGTH;
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TCHAR buffer[MAX_KEY_LENGTH];
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if (RegEnumKeyEx(key, i, buffer, &maxLen, 0, 0, 0, 0) == ERROR_SUCCESS)
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list.append(QString::fromWCharArray(buffer).toUtf8());
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}
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}
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RegCloseKey(key);
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}
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return list;
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}
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static QByteArray windowsSystemZoneId()
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{
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// On Vista and later is held in the value TimeZoneKeyName in key currTzRegPath
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QString id;
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HKEY key = NULL;
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QString tziKeyPath = QString::fromUtf8(currTzRegPath);
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if (openRegistryKey(tziKeyPath, &key)) {
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id = readRegistryString(key, L"TimeZoneKeyName");
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RegCloseKey(key);
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if (!id.isEmpty())
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return id.toUtf8();
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}
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// On XP we have to iterate over the zones until we find a match on
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// names/offsets with the current data
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TIME_ZONE_INFORMATION sysTzi;
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GetTimeZoneInformation(&sysTzi);
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bool ok = false;
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foreach (const QByteArray &winId, availableWindowsIds()) {
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if (equalTzi(getRegistryTzi(winId, &ok), sysTzi))
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return winId;
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}
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// If we can't determine the current ID use UTC
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return QByteArrayLiteral("UTC");
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}
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static QDate calculateTransitionLocalDate(const SYSTEMTIME &rule, int year)
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{
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// If month is 0 then there is no date
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if (rule.wMonth == 0)
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return QDate();
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SYSTEMTIME time = rule;
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// If the year isn't set, then the rule date is relative
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if (time.wYear == 0) {
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if (time.wDayOfWeek == 0)
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time.wDayOfWeek = 7;
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QDate date(year, time.wMonth, 1);
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int startDow = date.dayOfWeek();
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if (startDow <= time.wDayOfWeek)
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date = date.addDays(time.wDayOfWeek - startDow - 7);
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else
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date = date.addDays(time.wDayOfWeek - startDow);
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date = date.addDays(time.wDay * 7);
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while (date.month() != time.wMonth)
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date = date.addDays(-7);
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return date;
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}
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// If the year is set then is an absolute date
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return QDate(time.wYear, time.wMonth, time.wDay);
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}
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// Converts a date/time value into msecs
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static inline qint64 timeToMSecs(const QDate &date, const QTime &time)
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{
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return ((date.toJulianDay() - JULIAN_DAY_FOR_EPOCH) * MSECS_PER_DAY)
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+ time.msecsSinceStartOfDay();
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}
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static void calculateTransitionsForYear(const QWinTimeZonePrivate::QWinTransitionRule &rule, int year,
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qint64 *stdMSecs, qint64 *dstMSecs)
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{
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// TODO Consider caching the calculated values
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// The local time in Daylight Time when switches to Standard Time
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QDate standardDate = calculateTransitionLocalDate(rule.standardTimeRule, year);
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QTime standardTime = QTime(rule.standardTimeRule.wHour, rule.standardTimeRule.wMinute,
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rule.standardTimeRule.wSecond);
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if (standardDate.isValid() && standardTime.isValid()) {
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*stdMSecs = timeToMSecs(standardDate, standardTime)
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+ ((rule.standardTimeBias + rule.daylightTimeBias) * 60000);
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} else {
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*stdMSecs = QTimeZonePrivate::invalidMSecs();
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}
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// The local time in Standard Time when switches to Daylight Time
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QDate daylightDate = calculateTransitionLocalDate(rule.daylightTimeRule, year);
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QTime daylightTime = QTime(rule.daylightTimeRule.wHour, rule.daylightTimeRule.wMinute,
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rule.daylightTimeRule.wSecond);
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if (standardDate.isValid() && standardTime.isValid())
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*dstMSecs = timeToMSecs(daylightDate, daylightTime) + (rule.standardTimeBias * 60000);
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else
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*dstMSecs = QTimeZonePrivate::invalidMSecs();
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}
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static QLocale::Country userCountry()
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{
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#if defined(Q_OS_WINCE)
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// Guess that the syslem locale country is the right one to use
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// TODO Find if WinCE has equivalent api
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return QLocale::system().country();
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#else
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const GEOID id = GetUserGeoID(GEOCLASS_NATION);
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wchar_t code[3];
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const int size = GetGeoInfo(id, GEO_ISO2, code, 3, 0);
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return (size == 3) ? QLocalePrivate::codeToCountry(QString::fromWCharArray(code))
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: QLocale::AnyCountry;
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#endif // Q_OS_WINCE
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}
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// Create the system default time zone
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QWinTimeZonePrivate::QWinTimeZonePrivate()
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: QTimeZonePrivate()
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{
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init(QByteArray());
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}
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// Create a named time zone
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QWinTimeZonePrivate::QWinTimeZonePrivate(const QByteArray &olsenId)
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: QTimeZonePrivate()
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{
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init(olsenId);
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}
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QWinTimeZonePrivate::QWinTimeZonePrivate(const QWinTimeZonePrivate &other)
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: QTimeZonePrivate(other), m_windowsId(other.m_windowsId),
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m_displayName(other.m_displayName), m_standardName(other.m_standardName),
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m_daylightName(other.m_daylightName), m_tranRules(other.m_tranRules)
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{
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}
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QWinTimeZonePrivate::~QWinTimeZonePrivate()
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{
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}
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QTimeZonePrivate *QWinTimeZonePrivate::clone()
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{
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return new QWinTimeZonePrivate(*this);
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}
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void QWinTimeZonePrivate::init(const QByteArray &olsenId)
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{
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if (olsenId.isEmpty()) {
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m_windowsId = windowsSystemZoneId();
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m_id = systemTimeZoneId();
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} else {
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m_windowsId = olsenIdToWindowsId(olsenId);
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m_id = olsenId;
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}
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if (!m_windowsId.isEmpty()) {
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// Open the base TZI for the time zone
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HKEY baseKey = NULL;
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const QString baseKeyPath = QString::fromUtf8(tzRegPath) + QLatin1Char('\\')
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+ QString::fromUtf8(m_windowsId);
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if (openRegistryKey(baseKeyPath, &baseKey)) {
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// Load the localized names
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m_displayName = readRegistryString(baseKey, L"Display");
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m_standardName = readRegistryString(baseKey, L"Std");
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m_daylightName = readRegistryString(baseKey, L"Dlt");
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// On Vista and later the optional dynamic key holds historic data
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const QString dynamicKeyPath = baseKeyPath + QStringLiteral("\\Dynamic DST");
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HKEY dynamicKey = NULL;
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if (openRegistryKey(dynamicKeyPath, &dynamicKey)) {
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// Find out the start and end years stored, then iterate over them
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int startYear = readRegistryValue(dynamicKey, L"FirstEntry");
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int endYear = readRegistryValue(dynamicKey, L"LastEntry");
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for (int year = startYear; year <= endYear; ++year) {
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bool ruleOk;
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QWinTransitionRule rule = readRegistryRule(dynamicKey,
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(LPCWSTR)QString::number(year).utf16(),
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&ruleOk);
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rule.startYear = year;
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if (ruleOk)
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m_tranRules.append(rule);
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}
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RegCloseKey(dynamicKey);
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} else {
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// No dynamic data so use the base data
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bool ruleOk;
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QWinTransitionRule rule = readRegistryRule(baseKey, L"TZI", &ruleOk);
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rule.startYear = 1970;
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if (ruleOk)
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m_tranRules.append(rule);
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}
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RegCloseKey(baseKey);
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}
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}
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// If there are no rules then we failed to find a windowsId or any tzi info
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if (m_tranRules.size() == 0) {
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m_id.clear();
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m_windowsId.clear();
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m_displayName.clear();
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}
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}
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QString QWinTimeZonePrivate::comment() const
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{
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return m_displayName;
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}
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QString QWinTimeZonePrivate::displayName(QTimeZone::TimeType timeType,
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QTimeZone::NameType nameType,
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const QLocale &locale) const
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{
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// TODO Registry holds MUI keys, should be able to look up translations?
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Q_UNUSED(locale);
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if (nameType == QTimeZone::OffsetName) {
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QWinTransitionRule rule = ruleForYear(QDate::currentDate().year());
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if (timeType == QTimeZone::DaylightTime)
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return isoOffsetFormat((rule.standardTimeBias + rule.daylightTimeBias) * -60);
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else
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return isoOffsetFormat((rule.standardTimeBias) * -60);
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}
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switch (timeType) {
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case QTimeZone::DaylightTime :
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return m_daylightName;
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case QTimeZone::GenericTime :
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return m_displayName;
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case QTimeZone::StandardTime :
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return m_standardName;
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}
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return m_standardName;
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}
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QString QWinTimeZonePrivate::abbreviation(qint64 atMSecsSinceEpoch) const
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{
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return data(atMSecsSinceEpoch).abbreviation;
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}
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int QWinTimeZonePrivate::offsetFromUtc(qint64 atMSecsSinceEpoch) const
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{
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return data(atMSecsSinceEpoch).offsetFromUtc;
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}
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int QWinTimeZonePrivate::standardTimeOffset(qint64 atMSecsSinceEpoch) const
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{
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return data(atMSecsSinceEpoch).standardTimeOffset;
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}
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int QWinTimeZonePrivate::daylightTimeOffset(qint64 atMSecsSinceEpoch) const
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{
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return data(atMSecsSinceEpoch).daylightTimeOffset;
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}
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bool QWinTimeZonePrivate::hasDaylightTime() const
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{
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return hasTransitions();
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}
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bool QWinTimeZonePrivate::isDaylightTime(qint64 atMSecsSinceEpoch) const
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{
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return (data(atMSecsSinceEpoch).daylightTimeOffset != 0);
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}
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QTimeZonePrivate::Data QWinTimeZonePrivate::data(qint64 forMSecsSinceEpoch) const
|
|
{
|
|
// Convert MSecs to year to get transitions for, assumes no transitions around 31 Dec/1 Jan
|
|
int year = msecsToDate(forMSecsSinceEpoch).year();
|
|
|
|
qint64 first;
|
|
qint64 second;
|
|
qint64 next = maxMSecs();
|
|
qint64 stdMSecs;
|
|
qint64 dstMSecs;
|
|
QWinTransitionRule rule;
|
|
do {
|
|
// Convert the transition rules into msecs for the year we want to try
|
|
rule = ruleForYear(year);
|
|
calculateTransitionsForYear(rule, year, &stdMSecs, &dstMSecs);
|
|
if (stdMSecs < dstMSecs) {
|
|
first = stdMSecs;
|
|
second = dstMSecs;
|
|
} else {
|
|
first = dstMSecs;
|
|
second = stdMSecs;
|
|
}
|
|
if (forMSecsSinceEpoch >= second && second != invalidMSecs())
|
|
next = second;
|
|
else if (forMSecsSinceEpoch >= first && first != invalidMSecs())
|
|
next = first;
|
|
// If didn't fall in this year, try the previous
|
|
--year;
|
|
} while (next == maxMSecs() && year >= MIN_YEAR);
|
|
|
|
return ruleToData(rule, forMSecsSinceEpoch, (next == dstMSecs) ? QTimeZone::DaylightTime : QTimeZone::StandardTime);
|
|
}
|
|
|
|
bool QWinTimeZonePrivate::hasTransitions() const
|
|
{
|
|
foreach (const QWinTransitionRule &rule, m_tranRules) {
|
|
if (rule.standardTimeRule.wMonth > 0 && rule.daylightTimeRule.wMonth > 0)
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
QTimeZonePrivate::Data QWinTimeZonePrivate::nextTransition(qint64 afterMSecsSinceEpoch) const
|
|
{
|
|
// Convert MSecs to year to get transitions for, assumes no transitions around 31 Dec/1 Jan
|
|
int year = msecsToDate(afterMSecsSinceEpoch).year();
|
|
|
|
QWinTransitionRule rule;
|
|
// If the required year falls after the last rule start year and the last rule has no
|
|
// valid future transition calculations then there is no next transition
|
|
if (year > m_tranRules.last().startYear) {
|
|
rule = ruleForYear(year);
|
|
// If the rules have either a fixed year, or no month, then no future trans
|
|
if (rule.standardTimeRule.wYear != 0 || rule.daylightTimeRule.wYear != 0
|
|
|| rule.standardTimeRule.wMonth == 0 || rule.daylightTimeRule.wMonth == 0) {
|
|
return invalidData();
|
|
}
|
|
}
|
|
|
|
// Otherwise we have a valid rule for the required year that can be used
|
|
// to calculate this year or next
|
|
qint64 first;
|
|
qint64 second;
|
|
qint64 next = minMSecs();
|
|
qint64 stdMSecs;
|
|
qint64 dstMSecs;
|
|
do {
|
|
// Convert the transition rules into msecs for the year we want to try
|
|
rule = ruleForYear(year);
|
|
calculateTransitionsForYear(rule, year, &stdMSecs, &dstMSecs);
|
|
// Find the first and second transition for the year
|
|
if (stdMSecs < dstMSecs) {
|
|
first = stdMSecs;
|
|
second = dstMSecs;
|
|
} else {
|
|
first = dstMSecs;
|
|
second = stdMSecs;
|
|
}
|
|
if (afterMSecsSinceEpoch < first)
|
|
next = first;
|
|
else if (afterMSecsSinceEpoch < second)
|
|
next = second;
|
|
// If didn't fall in this year, try the next
|
|
++year;
|
|
} while (next == minMSecs() && year <= MAX_YEAR);
|
|
|
|
if (next == minMSecs() || next == invalidMSecs())
|
|
return invalidData();
|
|
|
|
return ruleToData(rule, next, (next == dstMSecs) ? QTimeZone::DaylightTime : QTimeZone::StandardTime);
|
|
}
|
|
|
|
QTimeZonePrivate::Data QWinTimeZonePrivate::previousTransition(qint64 beforeMSecsSinceEpoch) const
|
|
{
|
|
// Convert MSecs to year to get transitions for, assumes no transitions around 31 Dec/1 Jan
|
|
int year = msecsToDate(beforeMSecsSinceEpoch).year();
|
|
|
|
QWinTransitionRule rule;
|
|
// If the required year falls before the first rule start year and the first rule has no
|
|
// valid transition calculations then there is no previous transition
|
|
if (year < m_tranRules.first().startYear) {
|
|
rule = ruleForYear(year);
|
|
// If the rules have either a fixed year, or no month, then no previous trans
|
|
if (rule.standardTimeRule.wYear != 0 || rule.daylightTimeRule.wYear != 0
|
|
|| rule.standardTimeRule.wMonth == 0 || rule.daylightTimeRule.wMonth == 0) {
|
|
return invalidData();
|
|
}
|
|
}
|
|
|
|
qint64 first;
|
|
qint64 second;
|
|
qint64 next = maxMSecs();
|
|
qint64 stdMSecs;
|
|
qint64 dstMSecs;
|
|
do {
|
|
// Convert the transition rules into msecs for the year we want to try
|
|
rule = ruleForYear(year);
|
|
calculateTransitionsForYear(rule, year, &stdMSecs, &dstMSecs);
|
|
if (stdMSecs < dstMSecs) {
|
|
first = stdMSecs;
|
|
second = dstMSecs;
|
|
} else {
|
|
first = dstMSecs;
|
|
second = stdMSecs;
|
|
}
|
|
if (beforeMSecsSinceEpoch > second && second != invalidMSecs())
|
|
next = second;
|
|
else if (beforeMSecsSinceEpoch > first && first != invalidMSecs())
|
|
next = first;
|
|
// If didn't fall in this year, try the previous
|
|
--year;
|
|
} while (next == maxMSecs() && year >= MIN_YEAR);
|
|
|
|
if (next == maxMSecs())
|
|
return invalidData();
|
|
|
|
return ruleToData(rule, next, (next == dstMSecs) ? QTimeZone::DaylightTime : QTimeZone::StandardTime);
|
|
}
|
|
|
|
QByteArray QWinTimeZonePrivate::systemTimeZoneId() const
|
|
{
|
|
const QLocale::Country country = userCountry();
|
|
const QByteArray windowsId = windowsSystemZoneId();
|
|
QByteArray olsenId;
|
|
// If we have a real country, then try get a specific match for that country
|
|
if (country != QLocale::AnyCountry)
|
|
olsenId = windowsIdToDefaultOlsenId(windowsId, country);
|
|
// If we don't have a real country, or there wasn't a specific match, try the global default
|
|
if (olsenId.isEmpty()) {
|
|
olsenId = windowsIdToDefaultOlsenId(windowsId);
|
|
// If no global default then probably an unknown Windows ID so return UTC
|
|
if (olsenId.isEmpty())
|
|
return QByteArrayLiteral("UTC");
|
|
}
|
|
return olsenId;
|
|
}
|
|
|
|
QSet<QByteArray> QWinTimeZonePrivate::availableTimeZoneIds() const
|
|
{
|
|
QSet<QByteArray> set;
|
|
foreach (const QByteArray &winId, availableWindowsIds()) {
|
|
foreach (const QByteArray &olsenId, windowsIdToOlsenIds(winId))
|
|
set << olsenId;
|
|
}
|
|
return set;
|
|
}
|
|
|
|
QWinTimeZonePrivate::QWinTransitionRule QWinTimeZonePrivate::ruleForYear(int year) const
|
|
{
|
|
for (int i = m_tranRules.size() - 1; i >= 0; --i) {
|
|
if (m_tranRules.at(i).startYear <= year)
|
|
return m_tranRules.at(i);
|
|
}
|
|
return m_tranRules.at(0);
|
|
}
|
|
|
|
QTimeZonePrivate::Data QWinTimeZonePrivate::ruleToData(const QWinTransitionRule &rule,
|
|
qint64 atMSecsSinceEpoch,
|
|
QTimeZone::TimeType type) const
|
|
{
|
|
QTimeZonePrivate::Data tran = QTimeZonePrivate::invalidData();
|
|
tran.atMSecsSinceEpoch = atMSecsSinceEpoch;
|
|
tran.standardTimeOffset = rule.standardTimeBias * -60;
|
|
if (type == QTimeZone::DaylightTime) {
|
|
tran.daylightTimeOffset = rule.daylightTimeBias * -60;
|
|
tran.abbreviation = m_daylightName;
|
|
} else {
|
|
tran.daylightTimeOffset = 0;
|
|
tran.abbreviation = m_standardName;
|
|
}
|
|
tran.offsetFromUtc = tran.standardTimeOffset + tran.daylightTimeOffset;
|
|
return tran;
|
|
}
|
|
|
|
QT_END_NAMESPACE
|