1/****************************************************************************
2**
3** Copyright (C) 2019 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the QtCore module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 3 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL3 included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24**
25** GNU General Public License Usage
26** Alternatively, this file may be used under the terms of the GNU
27** General Public License version 2.0 or (at your option) the GNU General
28** Public license version 3 or any later version approved by the KDE Free
29** Qt Foundation. The licenses are as published by the Free Software
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31** included in the packaging of this file. Please review the following
32** information to ensure the GNU General Public License requirements will
33** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34** https://www.gnu.org/licenses/gpl-3.0.html.
35**
36** $QT_END_LICENSE$
37**
38****************************************************************************/
39
40#ifndef QGREGORIAN_CALENDAR_P_H
41#define QGREGORIAN_CALENDAR_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists for the convenience
48// of calendar implementations. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include "qromancalendar_p.h"
55
56QT_BEGIN_NAMESPACE
57
58class Q_CORE_EXPORT QGregorianCalendar : public QRomanCalendar
59{
60 // TODO: provide static methods, called by the overrides, that can be called
61 // directly by QDate to optimize various parts.
62public:
63 QGregorianCalendar();
64 // CAlendar properties:
65 QString name() const override;
66 QCalendar::System calendarSystem() const override;
67 // Date queries:
68 bool isLeapYear(int year) const override;
69 // Julian Day conversions:
70 bool dateToJulianDay(int year, int month, int day, qint64 *jd) const override;
71 QCalendar::YearMonthDay julianDayToDate(qint64 jd) const override;
72
73 // Names of months (implemented in qlocale.cpp):
74 QString monthName(const QLocale &locale, int month, int year,
75 QLocale::FormatType format) const override;
76 QString standaloneMonthName(const QLocale &locale, int month, int year,
77 QLocale::FormatType format) const override;
78
79 // Static optimized versions for the benefit of QDate:
80 static int weekDayOfJulian(qint64 jd);
81 static bool leapTest(int year);
82 static int monthLength(int month, int year);
83 static bool validParts(int year, int month, int day);
84 static QCalendar::YearMonthDay partsFromJulian(qint64 jd);
85 static bool julianFromParts(int year, int month, int day, qint64 *jd);
86};
87
88QT_END_NAMESPACE
89
90#endif // QGREGORIAN_CALENDAR_P_H
91

source code of qtbase/src/corelib/time/qgregoriancalendar_p.h