413 lines
12 KiB
C++
413 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <tools/date.hxx>
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#include <sal/log.hxx>
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#include <com/sun/star/util/DateTime.hpp>
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#include <systemdatetime.hxx>
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#include <comphelper/date.hxx>
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namespace
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{
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const sal_Int16 kYearMax = SAL_MAX_INT16;
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const sal_Int16 kYearMin = SAL_MIN_INT16;
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}
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void Date::setDateFromDMY( sal_uInt16 nDay, sal_uInt16 nMonth, sal_Int16 nYear )
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{
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// don't warn about 0/0/0, commonly used as a default-value/no-value
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SAL_WARN_IF( nYear == 0 && !(nYear == 0 && nMonth == 0 && nDay == 0),
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"tools.datetime", "Date::setDateFromDMY - sure about 0 year? It's not in the calendar.");
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assert( nMonth < 100 && "nMonth % 100 not representable" );
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assert( nDay < 100 && "nDay % 100 not representable" );
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if (nYear < 0)
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mnDate =
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(static_cast<sal_Int32>( nYear ) * 10000) -
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(static_cast<sal_Int32>( nMonth % 100 ) * 100) -
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static_cast<sal_Int32>( nDay % 100 );
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else
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mnDate =
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(static_cast<sal_Int32>( nYear ) * 10000) +
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(static_cast<sal_Int32>( nMonth % 100 ) * 100) +
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static_cast<sal_Int32>( nDay % 100 );
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}
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void Date::SetDate( sal_Int32 nNewDate )
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{
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assert( ((nNewDate / 10000) != 0) && "you don't want to set a 0 year, do you?" );
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mnDate = nNewDate;
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}
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// static
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sal_uInt16 Date::GetDaysInMonth( sal_uInt16 nMonth, sal_Int16 nYear )
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{
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SAL_WARN_IF( nMonth < 1 || 12 < nMonth, "tools.datetime", "Date::GetDaysInMonth - nMonth out of bounds " << nMonth);
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if (nMonth < 1)
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nMonth = 1;
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else if (12 < nMonth)
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nMonth = 12;
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return comphelper::date::getDaysInMonth( nMonth, nYear);
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}
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sal_Int32 Date::GetAsNormalizedDays() const
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{
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// This is a very common datum we often calculate from.
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if (mnDate == 18991230) // 1899-12-30
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{
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#ifndef NDEBUG
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static sal_Int32 nDays = DateToDays( GetDay(), GetMonth(), GetYear());
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assert(nDays == 693594);
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#endif
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return 693594;
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}
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// Not calling comphelper::date::convertDateToDaysNormalizing() here just
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// avoids a second check on null-date handling like above.
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sal_uInt16 nDay = GetDay();
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sal_uInt16 nMonth = GetMonth();
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sal_Int16 nYear = GetYear();
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comphelper::date::normalize( nDay, nMonth, nYear);
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return comphelper::date::convertDateToDays( nDay, nMonth, nYear);
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}
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sal_Int32 Date::DateToDays( sal_uInt16 nDay, sal_uInt16 nMonth, sal_Int16 nYear )
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{
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return comphelper::date::convertDateToDaysNormalizing( nDay, nMonth, nYear);
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}
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static Date lcl_DaysToDate( sal_Int32 nDays )
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{
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sal_uInt16 nDay;
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sal_uInt16 nMonth;
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sal_Int16 nYear;
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comphelper::date::convertDaysToDate( nDays, nDay, nMonth, nYear);
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return Date( nDay, nMonth, nYear);
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}
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Date::Date( DateInitSystem )
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{
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if ( !GetSystemDateTime( &mnDate, nullptr ) )
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setDateFromDMY( 1, 1, 1900 );
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}
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Date::Date( const css::util::DateTime& rDateTime )
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{
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setDateFromDMY( rDateTime.Day, rDateTime.Month, rDateTime.Year );
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}
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void Date::SetDay( sal_uInt16 nNewDay )
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{
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setDateFromDMY( nNewDay, GetMonth(), GetYear() );
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}
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void Date::SetMonth( sal_uInt16 nNewMonth )
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{
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setDateFromDMY( GetDay(), nNewMonth, GetYear() );
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}
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void Date::SetYear( sal_Int16 nNewYear )
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{
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assert( nNewYear != 0 );
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setDateFromDMY( GetDay(), GetMonth(), nNewYear );
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}
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void Date::AddYears( sal_Int16 nAddYears )
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{
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sal_Int16 nYear = GetYear();
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if (nYear < 0)
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{
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if (nAddYears < 0)
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{
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if (nYear < kYearMin - nAddYears)
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nYear = kYearMin;
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else
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nYear += nAddYears;
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}
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else
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{
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nYear += nAddYears;
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if (nYear == 0)
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nYear = 1;
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}
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}
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else
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{
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if (nAddYears > 0)
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{
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if (kYearMax - nAddYears < nYear)
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nYear = kYearMax;
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else
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nYear += nAddYears;
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}
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else
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{
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nYear += nAddYears;
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if (nYear == 0)
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nYear = -1;
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}
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}
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SetYear( nYear );
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if (GetMonth() == 2 && GetDay() == 29 && !comphelper::date::isLeapYear( nYear))
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SetDay(28);
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}
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void Date::AddMonths( sal_Int32 nAddMonths )
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{
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sal_Int32 nMonths = GetMonth() + nAddMonths;
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sal_Int32 nNewMonth = nMonths % 12;
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sal_Int32 nYear = GetYear() + nMonths / 12;
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if( nMonths <= 0 || nNewMonth == 0 )
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--nYear;
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if( nNewMonth <= 0 )
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nNewMonth += 12;
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if (nYear == 0)
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nYear = (nAddMonths < 0 ? -1 : 1);
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else if (nYear < kYearMin)
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nYear = kYearMin;
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else if (nYear > kYearMax)
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nYear = kYearMax;
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SetMonth( static_cast<sal_uInt16>(nNewMonth) );
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SetYear( static_cast<sal_Int16>(nYear) );
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Normalize();
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}
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DayOfWeek Date::GetDayOfWeek() const
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{
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return static_cast<DayOfWeek>((GetAsNormalizedDays()-1) % 7);
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}
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sal_uInt16 Date::GetDayOfYear() const
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{
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sal_uInt16 nDay = GetDay();
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sal_uInt16 nMonth = GetMonth();
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sal_Int16 nYear = GetYear();
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Normalize( nDay, nMonth, nYear);
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for( sal_uInt16 i = 1; i < nMonth; i++ )
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nDay += comphelper::date::getDaysInMonth( i, nYear );
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return nDay;
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}
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sal_uInt16 Date::GetWeekOfYear( DayOfWeek eStartDay,
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sal_Int16 nMinimumNumberOfDaysInWeek ) const
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{
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// coverity[ tainted_data_return : FALSE ] version 2023.12.2
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short n1WDay = static_cast<short>(Date( 1, 1, GetYear() ).GetDayOfWeek());
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short nDayOfYear = static_cast<short>(GetDayOfYear());
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// weekdays start at 0, thus decrement one
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nDayOfYear--;
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// account for StartDay
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n1WDay = (n1WDay+(7-static_cast<short>(eStartDay))) % 7;
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if (nMinimumNumberOfDaysInWeek < 1 || 7 < nMinimumNumberOfDaysInWeek)
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{
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SAL_WARN( "tools.datetime", "Date::GetWeekOfYear: invalid nMinimumNumberOfDaysInWeek" );
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nMinimumNumberOfDaysInWeek = 4;
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}
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short nWeek;
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if ( nMinimumNumberOfDaysInWeek == 1 )
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{
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nWeek = ((n1WDay+nDayOfYear)/7) + 1;
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// Set to 53rd week only if we're not in the
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// first week of the new year
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if ( nWeek == 54 )
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nWeek = 1;
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else if ( nWeek == 53 )
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{
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short nDaysInYear = static_cast<short>(GetDaysInYear());
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short nDaysNextYear = static_cast<short>(Date( 1, 1, GetNextYear() ).GetDayOfWeek());
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nDaysNextYear = (nDaysNextYear+(7-static_cast<short>(eStartDay))) % 7;
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if ( nDayOfYear > (nDaysInYear-nDaysNextYear-1) )
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nWeek = 1;
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}
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}
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else if ( nMinimumNumberOfDaysInWeek == 7 )
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{
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nWeek = ((n1WDay+nDayOfYear)/7);
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// First week of a year is equal to the last week of the previous year
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if ( nWeek == 0 )
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{
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Date aLastDatePrevYear( 31, 12, GetPrevYear() );
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nWeek = aLastDatePrevYear.GetWeekOfYear( eStartDay, nMinimumNumberOfDaysInWeek );
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}
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}
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else // ( nMinimumNumberOfDaysInWeek == something_else, commentary examples for 4 )
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{
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// x_monday - thursday
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if ( n1WDay < nMinimumNumberOfDaysInWeek )
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nWeek = 1;
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// Friday
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else if ( n1WDay == nMinimumNumberOfDaysInWeek )
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nWeek = 53;
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// Saturday
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else if ( n1WDay == nMinimumNumberOfDaysInWeek + 1 )
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{
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// Year after leap year
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if ( Date( 1, 1, GetPrevYear() ).IsLeapYear() )
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nWeek = 53;
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else
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nWeek = 52;
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}
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// Sunday
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else
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nWeek = 52;
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if ( (nWeek == 1) || (nDayOfYear + n1WDay > 6) )
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{
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if ( nWeek == 1 )
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nWeek += (nDayOfYear + n1WDay) / 7;
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else
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nWeek = (nDayOfYear + n1WDay) / 7;
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if ( nWeek == 53 )
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{
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// next x_Sunday == first x_Sunday in the new year
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// == still the same week!
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sal_Int32 nTempDays = GetAsNormalizedDays();
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nTempDays += 6 - (GetDayOfWeek()+(7-static_cast<short>(eStartDay))) % 7;
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nWeek = lcl_DaysToDate( nTempDays ).GetWeekOfYear( eStartDay, nMinimumNumberOfDaysInWeek );
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}
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}
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}
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return static_cast<sal_uInt16>(nWeek);
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}
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sal_uInt16 Date::GetDaysInMonth() const
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{
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sal_uInt16 nDay = GetDay();
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sal_uInt16 nMonth = GetMonth();
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sal_Int16 nYear = GetYear();
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Normalize( nDay, nMonth, nYear);
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return comphelper::date::getDaysInMonth( nMonth, nYear );
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}
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bool Date::IsLeapYear() const
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{
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sal_Int16 nYear = GetYear();
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return comphelper::date::isLeapYear( nYear );
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}
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bool Date::IsValidAndGregorian() const
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{
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sal_uInt16 nDay = GetDay();
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sal_uInt16 nMonth = GetMonth();
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sal_Int16 nYear = GetYear();
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if ( !nMonth || (nMonth > 12) )
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return false;
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if ( !nDay || (nDay > comphelper::date::getDaysInMonth( nMonth, nYear )) )
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return false;
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else if ( nYear <= 1582 )
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{
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if ( nYear < 1582 )
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return false;
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else if ( nMonth < 10 )
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return false;
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else if ( (nMonth == 10) && (nDay < 15) )
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return false;
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}
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return true;
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}
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bool Date::IsValidDate() const
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{
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return comphelper::date::isValidDate( GetDay(), GetMonth(), GetYear());
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}
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//static
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bool Date::IsValidDate( sal_uInt16 nDay, sal_uInt16 nMonth, sal_Int16 nYear )
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{
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return comphelper::date::isValidDate( nDay, nMonth, nYear);
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}
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bool Date::IsEndOfMonth() const
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{
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return IsEndOfMonth(GetDay(), GetMonth(), GetYear());
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}
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//static
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bool Date::IsEndOfMonth(sal_uInt16 nDay, sal_uInt16 nMonth, sal_Int16 nYear)
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{
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return comphelper::date::isValidDate(nDay, nMonth, nYear)
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&& comphelper::date::getDaysInMonth(nMonth, nYear) == nDay;
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}
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void Date::Normalize()
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{
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sal_uInt16 nDay = GetDay();
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sal_uInt16 nMonth = GetMonth();
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sal_Int16 nYear = GetYear();
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if (!Normalize( nDay, nMonth, nYear))
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return;
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setDateFromDMY( nDay, nMonth, nYear );
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}
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//static
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bool Date::Normalize( sal_uInt16 & rDay, sal_uInt16 & rMonth, sal_Int16 & rYear )
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{
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return comphelper::date::normalize( rDay, rMonth, rYear);
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}
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void Date::AddDays( sal_Int32 nDays )
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{
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if (nDays != 0)
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*this = lcl_DaysToDate( GetAsNormalizedDays() + nDays );
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}
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Date& Date::operator ++()
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{
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*this = lcl_DaysToDate( GetAsNormalizedDays() + 1 );
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return *this;
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}
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Date& Date::operator --()
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{
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*this = lcl_DaysToDate( GetAsNormalizedDays() - 1 );
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return *this;
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}
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Date operator +( const Date& rDate, sal_Int32 nDays )
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{
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Date aDate( rDate );
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aDate.AddDays( nDays );
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return aDate;
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}
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Date operator -( const Date& rDate, sal_Int32 nDays )
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{
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Date aDate( rDate );
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aDate.AddDays( -nDays );
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return aDate;
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}
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sal_Int32 operator -( const Date& rDate1, const Date& rDate2 )
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{
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return rDate1.GetAsNormalizedDays() - rDate2.GetAsNormalizedDays();
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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