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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+#ifndef INCLUDED_TOOLS_DATE_HXX
+#define INCLUDED_TOOLS_DATE_HXX
+
+#include <tools/toolsdllapi.h>
+
+#include <ostream>
+
+#include <com/sun/star/util/Date.hpp>
+
+namespace com::sun::star::util { struct DateTime; }
+
+enum DayOfWeek { MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY,
+ SATURDAY, SUNDAY };
+
+/** Represents a date in the proleptic Gregorian calendar.
+
+ Largest representable date is 32767-12-31 = 327671231
+
+ Smallest representable date is -32768-01-01 = -327680101
+
+ Due to possible conversions to css::util::Date, which has a short
+ Year member variable, these limits are fix.
+
+ Year value 0 is unused. The year before year 1 CE is year 1 BCE, which is
+ the traditional proleptic Gregorian calendar.
+
+ This is not how ISO 8601:2000 defines things (but ISO 8601:1998 Draft
+ Revision did), but it enables class Date to be used for writing XML files
+ as XML Schema Part 2 in D.3.2 No Year Zero says
+ "The year "0000" is an illegal year value.", see
+ https://www.w3.org/TR/2004/REC-xmlschema-2-20041028/#noYearZero
+ and furthermore the note for 3.2.7 dateTime
+ https://www.w3.org/TR/2004/REC-xmlschema-2-20041028/#dateTime
+
+ */
+class SAL_WARN_UNUSED TOOLS_DLLPUBLIC Date
+{
+private:
+ sal_Int32 mnDate;
+ void setDateFromDMY( sal_uInt16 nDay, sal_uInt16 nMonth, sal_Int16 nYear );
+
+public:
+ enum DateInitSystem
+ {
+ SYSTEM
+ };
+
+ enum DateInitEmpty
+ {
+ EMPTY
+ };
+
+ explicit Date( DateInitEmpty ) : mnDate(0) {}
+ explicit Date( DateInitSystem );
+ explicit Date( sal_Int32 nDate ) : mnDate(nDate) {}
+ Date( const Date& rDate ) : mnDate(rDate.mnDate) {}
+
+ /** nDay and nMonth both must be <100, nYear must be != 0 */
+ Date( sal_uInt16 nDay, sal_uInt16 nMonth, sal_Int16 nYear )
+ { setDateFromDMY(nDay, nMonth, nYear); }
+
+ Date( const css::util::Date& rUDate )
+ {
+ setDateFromDMY(rUDate.Day, rUDate.Month, rUDate.Year);
+ }
+ Date( const css::util::DateTime& _rDateTime );
+
+ bool IsEmpty() const { return mnDate == 0; }
+
+ void SetDate( sal_Int32 nNewDate );
+ sal_Int32 GetDate() const { return mnDate; }
+ /** Type safe access for values that are guaranteed to be unsigned, like Date::SYSTEM. */
+ sal_uInt32 GetDateUnsigned() const { return static_cast<sal_uInt32>(mnDate < 0 ? -mnDate : mnDate); }
+ css::util::Date GetUNODate() const { return css::util::Date(GetDay(), GetMonth(), GetYear()); }
+
+ /** nNewDay must be <100 */
+ void SetDay( sal_uInt16 nNewDay );
+ /** nNewMonth must be <100 */
+ void SetMonth( sal_uInt16 nNewMonth );
+ /** nNewYear must be != 0 */
+ void SetYear( sal_Int16 nNewYear );
+
+ sal_uInt16 GetDay() const
+ {
+ return mnDate < 0 ?
+ static_cast<sal_uInt16>(-mnDate % 100) :
+ static_cast<sal_uInt16>( mnDate % 100);
+ }
+ sal_uInt16 GetMonth() const
+ {
+ return mnDate < 0 ?
+ static_cast<sal_uInt16>((-mnDate / 100) % 100) :
+ static_cast<sal_uInt16>(( mnDate / 100) % 100);
+ }
+ sal_Int16 GetYear() const { return static_cast<sal_Int16>(mnDate / 10000); }
+ /** Type safe access for values that are guaranteed to be unsigned, like Date::SYSTEM. */
+ sal_uInt16 GetYearUnsigned() const { return static_cast<sal_uInt16>((mnDate < 0 ? -mnDate : mnDate) / 10000); }
+ sal_Int16 GetNextYear() const { sal_Int16 nY = GetYear(); return nY == -1 ? 1 : nY + 1; }
+ sal_Int16 GetPrevYear() const { sal_Int16 nY = GetYear(); return nY == 1 ? -1 : nY - 1; }
+
+ /** Add years skipping year 0 and truncating at limits. If the original
+ date was on Feb-29 and the resulting date is not a leap year, the
+ result is adjusted to Feb-28.
+ */
+ void AddYears( sal_Int16 nAddYears );
+
+ /** Add months skipping year 0 and truncating at limits. If the original
+ date was on Feb-29 or day 31 and the resulting date is not a leap year
+ or a month with fewer days, the result is adjusted to Feb-28 or day 30.
+ */
+ void AddMonths( sal_Int32 nAddMonths );
+
+ /** Add days skipping year 0 and truncating at limits.
+ */
+ void AddDays( sal_Int32 nAddDays );
+
+ /** Obtain the day of the week for the date.
+
+ Internally normalizes a copy of values.
+ The result may be unexpected for a non-normalized invalid date like
+ Date(31,11,2000) or a sequence of aDate.SetDay(31); aDate.SetMonth(11);
+ */
+ DayOfWeek GetDayOfWeek() const;
+
+ /** Obtain the day of the year for the date.
+
+ Internally normalizes a copy of values.
+ The result may be unexpected for a non-normalized invalid date like
+ Date(31,11,2000) or a sequence of aDate.SetDay(31); aDate.SetMonth(11);
+ */
+ sal_uInt16 GetDayOfYear() const;
+
+ /** Obtain the week of the year for a date.
+
+ @param nMinimumNumberOfDaysInWeek
+ How many days of a week must reside in the first week of a year.
+
+ Internally normalizes a copy of values.
+ The result may be unexpected for a non-normalized invalid date like
+ Date(31,11,2000) or a sequence of aDate.SetDay(31); aDate.SetMonth(11);
+ */
+ sal_uInt16 GetWeekOfYear( DayOfWeek eStartDay = MONDAY,
+ sal_Int16 nMinimumNumberOfDaysInWeek = 4 ) const;
+
+ /** Obtain the number of days in the month of the year of the date.
+
+ Internally normalizes a copy of values.
+
+ The result may be unexpected for a non-normalized invalid date like
+ Date(31,11,2000) or a sequence of aDate.SetDay(31); aDate.SetMonth(11);
+
+ These would result in 31 as --11-31 rolls over to --12-01 and the
+ number of days in December is returned.
+
+ Instead, to obtain the value for the actual set use the static method
+ Date::GetDaysInMonth( aDate.GetMonth(), aDate.GetYear()) in such cases.
+ */
+ sal_uInt16 GetDaysInMonth() const;
+
+ sal_uInt16 GetDaysInYear() const { return (IsLeapYear()) ? 366 : 365; }
+ bool IsLeapYear() const;
+
+ /** If the represented date is valid (1<=month<=12, 1<=day<=(28,29,30,31)
+ depending on month/year) AND is of the Gregorian calendar (1582-10-15
+ <= date)
+ */
+ bool IsValidAndGregorian() const;
+
+ /** If the represented date is valid (1<=month<=12, 1<=day<=(28,29,30,31)
+ depending on month/year) */
+ bool IsValidDate() const;
+
+ /** Normalize date, invalid day or month values are adapted such that they
+ carry over to the next month or/and year, for example 1999-02-32
+ becomes 1999-03-04, 1999-13-01 becomes 2000-01-01, 1999-13-42 becomes
+ 2000-02-11. Truncates at -32768-01-01 or 32767-12-31, 0001-00-x will
+ yield the normalized value of -0001-12-x
+
+ This may be necessary after Date ctors or if the SetDate(), SetDay(),
+ SetMonth(), SetYear() methods set individual non-matching values.
+ Adding/subtracting to/from dates never produces invalid dates.
+ */
+ void Normalize();
+
+ bool IsBetween( const Date& rFrom, const Date& rTo ) const
+ { return ((mnDate >= rFrom.mnDate) &&
+ (mnDate <= rTo.mnDate)); }
+
+ bool operator ==( const Date& rDate ) const
+ { return (mnDate == rDate.mnDate); }
+ bool operator !=( const Date& rDate ) const
+ { return (mnDate != rDate.mnDate); }
+ bool operator >( const Date& rDate ) const
+ { return (mnDate > rDate.mnDate); }
+ bool operator <( const Date& rDate ) const
+ { return (mnDate < rDate.mnDate); }
+ bool operator >=( const Date& rDate ) const
+ { return (mnDate >= rDate.mnDate); }
+ bool operator <=( const Date& rDate ) const
+ { return (mnDate <= rDate.mnDate); }
+
+ Date& operator =( const Date& rDate )
+ { mnDate = rDate.mnDate; return *this; }
+ Date& operator =( const css::util::Date& rUDate )
+ { setDateFromDMY( rUDate.Day, rUDate.Month, rUDate.Year); return *this; }
+ Date& operator ++();
+ Date& operator --();
+
+ TOOLS_DLLPUBLIC friend Date operator +( const Date& rDate, sal_Int32 nDays );
+ TOOLS_DLLPUBLIC friend Date operator -( const Date& rDate, sal_Int32 nDays );
+ TOOLS_DLLPUBLIC friend sal_Int32 operator -( const Date& rDate1, const Date& rDate2 );
+
+ /** Obtain number of days in a month of a year.
+
+ Internally sanitizes nMonth to values 1 <= nMonth <= 12, does not
+ normalize values.
+ */
+ static sal_uInt16 GetDaysInMonth( sal_uInt16 nMonth, sal_Int16 nYear );
+
+ /// Internally normalizes values.
+ static sal_Int32 DateToDays( sal_uInt16 nDay, sal_uInt16 nMonth, sal_Int16 nYear );
+ /// Semantically identical to IsValidDate() member method.
+ static bool IsValidDate( sal_uInt16 nDay, sal_uInt16 nMonth, sal_Int16 nYear );
+ /// Semantically identical to Normalize() member method.
+ static bool Normalize( sal_uInt16 & rDay, sal_uInt16 & rMonth, sal_Int16 & rYear );
+
+ private:
+ /// An accelerated form of DateToDays on this date
+ sal_Int32 GetAsNormalizedDays() const;
+};
+
+TOOLS_DLLPUBLIC std::ostream& operator<<(std::ostream& os, const Date& rDate);
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */