480 lines
13 KiB
C++
480 lines
13 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2000, 2010 Oracle and/or its affiliates.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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// MARKER(update_precomp.py): autogen include statement, do not remove
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#include "precompiled_tools.hxx"
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#if defined( WNT )
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#include <windows.h>
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#else
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#include <time.h>
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#endif
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#include <tools/debug.hxx>
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#include <tools/date.hxx>
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#ifdef MACOSX
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extern "C" {
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struct tm *localtime_r(const time_t *timep, struct tm *buffer);
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}
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#endif
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// =======================================================================
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static sal_uInt16 aDaysInMonth[12] = { 31, 28, 31, 30, 31, 30,
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31, 31, 30, 31, 30, 31 };
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#define MAX_DAYS 3636532
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// =======================================================================
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inline sal_Bool ImpIsLeapYear( sal_uInt16 nYear )
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{
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return (
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( ((nYear % 4) == 0) && ((nYear % 100) != 0) ) ||
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( (nYear % 400) == 0 )
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);
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}
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// -----------------------------------------------------------------------
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inline sal_uInt16 DaysInMonth( sal_uInt16 nMonth, sal_uInt16 nYear )
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{
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if ( nMonth != 2 )
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return aDaysInMonth[nMonth-1];
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else
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{
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if (ImpIsLeapYear(nYear))
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return aDaysInMonth[nMonth-1] + 1;
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else
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return aDaysInMonth[nMonth-1];
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}
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}
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// -----------------------------------------------------------------------
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long Date::DateToDays( sal_uInt16 nDay, sal_uInt16 nMonth, sal_uInt16 nYear )
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{
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long nDays;
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nDays = ((sal_uIntPtr)nYear-1) * 365;
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nDays += ((nYear-1) / 4) - ((nYear-1) / 100) + ((nYear-1) / 400);
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for( sal_uInt16 i = 1; i < nMonth; i++ )
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nDays += DaysInMonth(i,nYear);
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nDays += nDay;
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return nDays;
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}
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// -----------------------------------------------------------------------
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static void DaysToDate( long nDays,
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sal_uInt16& rDay, sal_uInt16& rMonth, sal_uInt16& rYear )
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{
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long nTempDays;
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long i = 0;
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sal_Bool bCalc;
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do
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{
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nTempDays = (long)nDays;
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rYear = (sal_uInt16)((nTempDays / 365) - i);
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nTempDays -= ((sal_uIntPtr)rYear-1) * 365;
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nTempDays -= ((rYear-1) / 4) - ((rYear-1) / 100) + ((rYear-1) / 400);
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bCalc = sal_False;
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if ( nTempDays < 1 )
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{
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i++;
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bCalc = sal_True;
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}
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else
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{
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if ( nTempDays > 365 )
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{
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if ( (nTempDays != 366) || !ImpIsLeapYear( rYear ) )
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{
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i--;
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bCalc = sal_True;
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}
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}
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}
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}
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while ( bCalc );
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rMonth = 1;
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while ( (sal_uIntPtr)nTempDays > DaysInMonth( rMonth, rYear ) )
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{
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nTempDays -= DaysInMonth( rMonth, rYear );
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rMonth++;
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}
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rDay = (sal_uInt16)nTempDays;
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}
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// =======================================================================
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Date::Date()
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{
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#if defined WNT
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SYSTEMTIME aDateTime;
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GetLocalTime( &aDateTime );
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// Datum zusammenbauen
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nDate = ((sal_uIntPtr)aDateTime.wDay) +
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(((sal_uIntPtr)aDateTime.wMonth)*100) +
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(((sal_uIntPtr)aDateTime.wYear)*10000);
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#else
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time_t nTmpTime;
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struct tm aTime;
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// Zeit ermitteln
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nTmpTime = time( 0 );
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// Datum zusammenbauen
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if ( localtime_r( &nTmpTime, &aTime ) )
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{
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nDate = ((sal_uIntPtr)aTime.tm_mday) +
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(((sal_uIntPtr)(aTime.tm_mon+1))*100) +
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(((sal_uIntPtr)(aTime.tm_year+1900))*10000);
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}
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else
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nDate = 1 + 100 + (((sal_uIntPtr)1900)*10000);
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#endif
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}
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// -----------------------------------------------------------------------
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void Date::SetDay( sal_uInt16 nNewDay )
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{
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sal_uIntPtr nMonth = GetMonth();
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sal_uIntPtr nYear = GetYear();
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nDate = ((sal_uIntPtr)(nNewDay%100)) + (nMonth*100) + (nYear*10000);
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}
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// -----------------------------------------------------------------------
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void Date::SetMonth( sal_uInt16 nNewMonth )
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{
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sal_uIntPtr nDay = GetDay();
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sal_uIntPtr nYear = GetYear();
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nDate = nDay + (((sal_uIntPtr)(nNewMonth%100))*100) + (nYear*10000);
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}
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// -----------------------------------------------------------------------
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void Date::SetYear( sal_uInt16 nNewYear )
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{
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sal_uIntPtr nDay = GetDay();
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sal_uIntPtr nMonth = GetMonth();
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nDate = nDay + (nMonth*100) + (((sal_uIntPtr)(nNewYear%10000))*10000);
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}
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// -----------------------------------------------------------------------
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DayOfWeek Date::GetDayOfWeek() const
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{
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return (DayOfWeek)((sal_uIntPtr)(DateToDays( GetDay(), GetMonth(), GetYear() )-1) % 7);
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}
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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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for( sal_uInt16 i = 1; i < GetMonth(); i++ )
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nDay = nDay + ::DaysInMonth( i, GetYear() ); // += yields a warning on MSVC, so don't use it
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return nDay;
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}
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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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short nWeek;
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short n1WDay = (short)Date( 1, 1, GetYear() ).GetDayOfWeek();
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short nDayOfYear = (short)GetDayOfYear();
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// Wochentage beginnen bei 0, deshalb einen abziehen
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nDayOfYear--;
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// StartDay beruecksichtigen
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n1WDay = (n1WDay+(7-(short)eStartDay)) % 7;
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if (nMinimumNumberOfDaysInWeek < 1 || 7 < nMinimumNumberOfDaysInWeek)
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{
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DBG_ERRORFILE("Date::GetWeekOfYear: invalid nMinimumNumberOfDaysInWeek");
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nMinimumNumberOfDaysInWeek = 4;
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}
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if ( nMinimumNumberOfDaysInWeek == 1 )
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{
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nWeek = ((n1WDay+nDayOfYear)/7) + 1;
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// 53te-Woche nur dann, wenn wir nicht schon in der ersten
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// Woche des neuen Jahres liegen
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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 = (short)GetDaysInYear();
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short nDaysNextYear = (short)Date( 1, 1, GetYear()+1 ).GetDayOfWeek();
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nDaysNextYear = (nDaysNextYear+(7-(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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// Erste Woche eines Jahres entspricht der letzen Woche des
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// vorherigen Jahres
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if ( nWeek == 0 )
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{
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Date aLastDatePrevYear( 31, 12, GetYear()-1 );
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nWeek = aLastDatePrevYear.GetWeekOfYear( eStartDay, nMinimumNumberOfDaysInWeek );
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}
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}
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else // ( nMinimumNumberOfDaysInWeek == somehing_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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// Jahr nach Schaltjahr
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if ( Date( 1, 1, GetYear()-1 ).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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// naechster x_Sonntag == erster x_Sonntag im neuen Jahr
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// == noch gleiche Woche
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long nTempDays = DateToDays( GetDay(), GetMonth(), GetYear() );
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nTempDays += 6 - (GetDayOfWeek()+(7-(short)eStartDay)) % 7;
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sal_uInt16 nDay;
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sal_uInt16 nMonth;
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sal_uInt16 nYear;
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DaysToDate( nTempDays, nDay, nMonth, nYear );
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nWeek = Date( nDay, nMonth, nYear ).GetWeekOfYear( eStartDay, nMinimumNumberOfDaysInWeek );
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}
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}
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}
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return (sal_uInt16)nWeek;
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}
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// -----------------------------------------------------------------------
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sal_uInt16 Date::GetDaysInMonth() const
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{
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return DaysInMonth( GetMonth(), GetYear() );
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}
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// -----------------------------------------------------------------------
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sal_Bool Date::IsLeapYear() const
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{
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sal_uInt16 nYear = GetYear();
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return ImpIsLeapYear( nYear );
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}
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// -----------------------------------------------------------------------
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sal_Bool Date::IsValid() 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_uInt16 nYear = GetYear();
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if ( !nMonth || (nMonth > 12) )
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return sal_False;
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if ( !nDay || (nDay > DaysInMonth( nMonth, nYear )) )
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return sal_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 sal_False;
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else if ( nMonth < 10 )
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return sal_False;
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else if ( (nMonth == 10) && (nDay < 15) )
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return sal_False;
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}
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return sal_True;
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}
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// -----------------------------------------------------------------------
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Date& Date::operator +=( long nDays )
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{
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sal_uInt16 nDay;
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sal_uInt16 nMonth;
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sal_uInt16 nYear;
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long nTempDays = DateToDays( GetDay(), GetMonth(), GetYear() );
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nTempDays += nDays;
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if ( nTempDays > MAX_DAYS )
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nDate = 31 + (12*100) + (((sal_uIntPtr)9999)*10000);
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else if ( nTempDays <= 0 )
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nDate = 1 + 100;
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else
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{
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DaysToDate( nTempDays, nDay, nMonth, nYear );
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nDate = ((sal_uIntPtr)nDay) + (((sal_uIntPtr)nMonth)*100) + (((sal_uIntPtr)nYear)*10000);
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}
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return *this;
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}
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// -----------------------------------------------------------------------
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Date& Date::operator -=( long nDays )
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{
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sal_uInt16 nDay;
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sal_uInt16 nMonth;
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sal_uInt16 nYear;
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long nTempDays = DateToDays( GetDay(), GetMonth(), GetYear() );
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nTempDays -= nDays;
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if ( nTempDays > MAX_DAYS )
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nDate = 31 + (12*100) + (((sal_uIntPtr)9999)*10000);
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else if ( nTempDays <= 0 )
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nDate = 1 + 100;
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else
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{
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DaysToDate( nTempDays, nDay, nMonth, nYear );
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nDate = ((sal_uIntPtr)nDay) + (((sal_uIntPtr)nMonth)*100) + (((sal_uIntPtr)nYear)*10000);
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}
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return *this;
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}
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// -----------------------------------------------------------------------
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Date& Date::operator ++()
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{
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sal_uInt16 nDay;
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sal_uInt16 nMonth;
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sal_uInt16 nYear;
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long nTempDays = DateToDays( GetDay(), GetMonth(), GetYear() );
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if ( nTempDays < MAX_DAYS )
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{
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nTempDays++;
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DaysToDate( nTempDays, nDay, nMonth, nYear );
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nDate = ((sal_uIntPtr)nDay) + (((sal_uIntPtr)nMonth)*100) + (((sal_uIntPtr)nYear)*10000);
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}
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return *this;
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}
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// -----------------------------------------------------------------------
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Date& Date::operator --()
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{
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sal_uInt16 nDay;
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sal_uInt16 nMonth;
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sal_uInt16 nYear;
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long nTempDays = DateToDays( GetDay(), GetMonth(), GetYear() );
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if ( nTempDays > 1 )
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{
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nTempDays--;
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DaysToDate( nTempDays, nDay, nMonth, nYear );
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nDate = ((sal_uIntPtr)nDay) + (((sal_uIntPtr)nMonth)*100) + (((sal_uIntPtr)nYear)*10000);
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}
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return *this;
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}
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#ifndef MPW33
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// -----------------------------------------------------------------------
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Date Date::operator ++( int )
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{
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Date aOldDate = *this;
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Date::operator++();
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return aOldDate;
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}
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// -----------------------------------------------------------------------
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Date Date::operator --( int )
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{
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Date aOldDate = *this;
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Date::operator--();
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return aOldDate;
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}
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#endif
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// -----------------------------------------------------------------------
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Date operator +( const Date& rDate, long nDays )
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{
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Date aDate( rDate );
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aDate += nDays;
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return aDate;
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}
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// -----------------------------------------------------------------------
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Date operator -( const Date& rDate, long nDays )
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{
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Date aDate( rDate );
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aDate -= nDays;
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return aDate;
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}
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// -----------------------------------------------------------------------
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long operator -( const Date& rDate1, const Date& rDate2 )
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{
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sal_uIntPtr nTempDays1 = Date::DateToDays( rDate1.GetDay(), rDate1.GetMonth(),
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rDate1.GetYear() );
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sal_uIntPtr nTempDays2 = Date::DateToDays( rDate2.GetDay(), rDate2.GetMonth(),
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rDate2.GetYear() );
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return nTempDays1 - nTempDays2;
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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