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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 .
+ */
+#include <tools/datetime.hxx>
+#include <rtl/math.hxx>
+#include <sal/log.hxx>
+
+#include <systemdatetime.hxx>
+
+DateTime::DateTime(DateTimeInitSystem)
+ : Date( Date::EMPTY )
+ , Time( Time::EMPTY )
+{
+ sal_Int32 nD = 0;
+ sal_Int64 nT = 0;
+ if ( GetSystemDateTime( &nD, &nT ) )
+ {
+ Date::operator=( Date( nD ) );
+ SetTime( nT );
+ }
+ else
+ Date::operator=( Date( 1, 1, 1900 ) ); // Time::nTime is already 0
+}
+
+DateTime::DateTime( const css::util::DateTime& rDateTime )
+ : Date( rDateTime.Day, rDateTime.Month, rDateTime.Year ),
+ Time( rDateTime.Hours, rDateTime.Minutes, rDateTime.Seconds, rDateTime.NanoSeconds )
+{
+}
+
+DateTime& DateTime::operator =( const css::util::DateTime& rUDateTime )
+{
+ Date::operator=( Date( rUDateTime.Day, rUDateTime.Month, rUDateTime.Year));
+ Time::operator=( Time( rUDateTime));
+ return *this;
+}
+
+bool DateTime::IsBetween( const DateTime& rFrom, const DateTime& rTo ) const
+{
+ return (*this >= rFrom) && (*this <= rTo);
+}
+
+bool DateTime::operator >( const DateTime& rDateTime ) const
+{
+ return (Date::operator>( rDateTime )) ||
+ (Date::operator==( rDateTime ) && tools::Time::operator>( rDateTime ));
+}
+
+bool DateTime::operator <( const DateTime& rDateTime ) const
+{
+ return (Date::operator<( rDateTime )) ||
+ (Date::operator==( rDateTime ) && tools::Time::operator<( rDateTime ));
+}
+
+bool DateTime::operator >=( const DateTime& rDateTime ) const
+{
+ return (Date::operator>( rDateTime )) ||
+ (Date::operator==( rDateTime ) && tools::Time::operator>=( rDateTime ));
+}
+
+bool DateTime::operator <=( const DateTime& rDateTime ) const
+{
+ return (Date::operator<( rDateTime )) ||
+ (Date::operator==( rDateTime ) && tools::Time::operator<=( rDateTime ));
+}
+
+sal_Int64 DateTime::GetSecFromDateTime( const Date& rDate ) const
+{
+ if ( Date::operator<( rDate ) )
+ return 0;
+ else
+ {
+ sal_Int64 nSec = Date( *this ) - rDate;
+ nSec *= 24UL*60*60;
+ sal_Int64 nHour = GetHour();
+ sal_Int64 nMin = GetMin();
+ nSec += (nHour*3600)+(nMin*60)+GetSec();
+ return nSec;
+ }
+}
+
+DateTime& DateTime::operator +=( const tools::Time& rTime )
+{
+ tools::Time aTime = *this;
+ aTime += rTime;
+ sal_uInt16 nHours = aTime.GetHour();
+ if ( aTime.GetTime() > 0 )
+ {
+ while ( nHours >= 24 )
+ {
+ Date::operator++();
+ nHours -= 24;
+ }
+ aTime.SetHour( nHours );
+ }
+ else if ( aTime.GetTime() != 0 )
+ {
+ while ( nHours >= 24 )
+ {
+ Date::operator--();
+ nHours -= 24;
+ }
+ Date::operator--();
+ aTime = Time( 24, 0, 0 )+aTime;
+ }
+ tools::Time::operator=( aTime );
+
+ return *this;
+}
+
+DateTime& DateTime::operator -=( const tools::Time& rTime )
+{
+ tools::Time aTime = *this;
+ aTime -= rTime;
+ sal_uInt16 nHours = aTime.GetHour();
+ if ( aTime.GetTime() > 0 )
+ {
+ while ( nHours >= 24 )
+ {
+ Date::operator++();
+ nHours -= 24;
+ }
+ aTime.SetHour( nHours );
+ }
+ else if ( aTime.GetTime() != 0 )
+ {
+ while ( nHours >= 24 )
+ {
+ Date::operator--();
+ nHours -= 24;
+ }
+ Date::operator--();
+ aTime = Time( 24, 0, 0 )+aTime;
+ }
+ tools::Time::operator=( aTime );
+
+ return *this;
+}
+
+DateTime operator +( const DateTime& rDateTime, sal_Int32 nDays )
+{
+ DateTime aDateTime( rDateTime );
+ aDateTime.AddDays( nDays );
+ return aDateTime;
+}
+
+DateTime operator -( const DateTime& rDateTime, sal_Int32 nDays )
+{
+ DateTime aDateTime( rDateTime );
+ aDateTime.AddDays( -nDays );
+ return aDateTime;
+}
+
+DateTime operator +( const DateTime& rDateTime, const tools::Time& rTime )
+{
+ DateTime aDateTime( rDateTime );
+ aDateTime += rTime;
+ return aDateTime;
+}
+
+DateTime operator -( const DateTime& rDateTime, const tools::Time& rTime )
+{
+ DateTime aDateTime( rDateTime );
+ aDateTime -= rTime;
+ return aDateTime;
+}
+
+void DateTime::AddTime( double fTimeInDays )
+{
+ double fInt, fFrac;
+ if ( fTimeInDays < 0.0 )
+ {
+ fInt = ::rtl::math::approxCeil( fTimeInDays );
+ fFrac = fInt <= fTimeInDays ? 0.0 : fTimeInDays - fInt;
+ }
+ else
+ {
+ fInt = ::rtl::math::approxFloor( fTimeInDays );
+ fFrac = fInt >= fTimeInDays ? 0.0 : fTimeInDays - fInt;
+ }
+ AddDays( sal_Int32(fInt) ); // full days
+ if ( fFrac )
+ {
+ tools::Time aTime(0); // default ctor calls system time, we don't need that
+ fFrac *= ::tools::Time::nanoSecPerDay; // time expressed in nanoseconds
+ aTime.MakeTimeFromNS( static_cast<sal_Int64>(fFrac) ); // method handles negative ns
+ operator+=( aTime );
+ }
+}
+
+DateTime operator +( const DateTime& rDateTime, double fTimeInDays )
+{
+ DateTime aDateTime( rDateTime );
+ aDateTime.AddTime( fTimeInDays );
+ return aDateTime;
+}
+
+double operator -( const DateTime& rDateTime1, const DateTime& rDateTime2 )
+{
+ sal_Int32 nDays = static_cast<const Date&>(rDateTime1)
+ - static_cast<const Date&>(rDateTime2);
+ sal_Int64 nTime = rDateTime1.GetNSFromTime() - rDateTime2.GetNSFromTime();
+ if ( nTime )
+ {
+ double fTime = double(nTime);
+ fTime /= ::tools::Time::nanoSecPerDay; // convert from nanoseconds to fraction
+ if ( nDays < 0 && fTime > 0.0 )
+ fTime = 1.0 - fTime;
+ return double(nDays) + fTime;
+ }
+ return double(nDays);
+}
+
+void DateTime::GetWin32FileDateTime( sal_uInt32 & rLower, sal_uInt32 & rUpper ) const
+{
+ const sal_Int64 a100nPerSecond = SAL_CONST_INT64( 10000000 );
+ const sal_Int64 a100nPerDay = a100nPerSecond * sal_Int64( 60 * 60 * 24 );
+
+ // FILETIME is indirectly documented as uint64, see
+ // https://msdn.microsoft.com/en-us/library/windows/desktop/ms724284.aspx
+ // mentioning the ULARGE_INTEGER structure.
+ // https://msdn.microsoft.com/en-us/library/windows/desktop/ms724280.aspx
+ // mentions that if FILETIME is not less than 0x8000000000000000 then the
+ // FileTimeToSystemTime function fails, which is another indicator.
+ // Unless there's evidence that FILETIME can represent a signed offset from
+ // 1601-01-01 truncate at 0. (reading part below in
+ // CreateFromWin32FileDateTime() would had to be adapted to signed as
+ // well).
+ sal_Int16 nYear = GetYear();
+ SAL_WARN_IF( nYear < 1601, "tools.datetime", "DateTime::GetWin32FileDateTime - year < 1601: " << nYear);
+
+ sal_Int64 aTime = (nYear < 1601 ? 0 : (
+ a100nPerDay * (*this - Date(1,1,1601)) +
+ GetNSFromTime()/100));
+
+ rLower = sal_uInt32( aTime % SAL_CONST_UINT64( 0x100000000 ) );
+ rUpper = sal_uInt32( aTime / SAL_CONST_UINT64( 0x100000000 ) );
+}
+
+DateTime DateTime::CreateFromWin32FileDateTime( sal_uInt32 rLower, sal_uInt32 rUpper )
+{
+ // (rUpper|rLower) = 100-nanosecond intervals since 1601-01-01 00:00
+ const sal_uInt64 a100nPerSecond = SAL_CONST_UINT64( 10000000 );
+ const sal_uInt64 a100nPerDay = a100nPerSecond * sal_uInt64( 60 * 60 * 24 );
+
+ sal_uInt64 aTime =
+ sal_uInt64( rUpper ) * SAL_CONST_UINT64( 0x100000000 ) +
+ sal_uInt64( rLower );
+
+ SAL_WARN_IF( static_cast<sal_Int64>(aTime) < 0, "tools.datetime",
+ "DateTime::CreateFromWin32FileDateTime - absurdly high value expected?");
+
+ sal_uInt64 nDays = aTime / a100nPerDay;
+
+ Date aDate(1,1,1601);
+ // (0xffffffffffffffff / a100nPerDay = 21350398) fits into sal_Int32
+ // (0x7fffffff = 2147483647)
+ aDate.AddDays(nDays);
+
+ SAL_WARN_IF( aDate - Date(1,1,1601) != static_cast<sal_Int32>(nDays), "tools.datetime",
+ "DateTime::CreateFromWin32FileDateTime - date truncated to max");
+
+ sal_uInt64 nNanos = (aTime - (nDays * a100nPerDay)) * 100;
+ return DateTime( aDate, tools::Time(
+ static_cast<sal_uInt32>((nNanos / tools::Time::nanoSecPerHour) % sal_uInt64( 24 )),
+ static_cast<sal_uInt32>((nNanos / tools::Time::nanoSecPerMinute) % sal_uInt64( 60 )),
+ static_cast<sal_uInt32>((nNanos / tools::Time::nanoSecPerSec) % sal_uInt64( 60 )),
+ static_cast<sal_uInt64>( nNanos % tools::Time::nanoSecPerSec)));
+}
+
+DateTime DateTime::CreateFromUnixTime(const double fSecondsSinceEpoch)
+{
+ double fValue = fSecondsSinceEpoch / Time::secondPerDay;
+ const sal_Int32 nDays = static_cast <sal_Int32>(::rtl::math::approxFloor(fValue));
+
+ Date aDate (1, 1, 1970);
+ aDate.AddDays(nDays);
+ SAL_WARN_IF(aDate - Date(1, 1, 1970) != nDays, "tools.datetime",
+ "DateTime::CreateFromUnixTime - date truncated to max");
+
+ fValue -= nDays;
+
+ const sal_uInt64 nNanos = fValue * tools::Time::nanoSecPerDay;
+ return DateTime( aDate, tools::Time(
+ static_cast<sal_uInt32>((nNanos / tools::Time::nanoSecPerHour) % sal_uInt64( 24 )),
+ static_cast<sal_uInt32>((nNanos / tools::Time::nanoSecPerMinute) % sal_uInt64( 60 )),
+ static_cast<sal_uInt32>((nNanos / tools::Time::nanoSecPerSec) % sal_uInt64( 60 )),
+ static_cast<sal_uInt64>( nNanos % tools::Time::nanoSecPerSec)));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */