tools/source/datetime/datetime.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19 #include <tools/datetime.hxx>
  20 #include <rtl/math.hxx>
  21
  22 DateTime::DateTime( const css::util::DateTime& rDateTime )
  23   : Date( rDateTime.Day, rDateTime.Month, rDateTime.Year ),
  24     Time( rDateTime.Hours, rDateTime.Minutes, rDateTime.Seconds, rDateTime.NanoSeconds )
  25 {
  26 }
  27
  28 bool DateTime::IsBetween( const DateTime& rFrom, const DateTime& rTo ) const
  29 {
  30     if ( (*this >= rFrom) && (*this <= rTo) )
  31         return true;
  32     else
  33         return false;
  34 }
  35
  36 bool DateTime::operator >( const DateTime& rDateTime ) const
  37 {
  38     if ( (Date::operator>( rDateTime )) ||
  39          (Date::operator==( rDateTime ) && tools::Time::operator>( rDateTime )) )
  40         return true;
  41     else
  42         return false;
  43 }
  44
  45 bool DateTime::operator <( const DateTime& rDateTime ) const
  46 {
  47     if ( (Date::operator<( rDateTime )) ||
  48          (Date::operator==( rDateTime ) && tools::Time::operator<( rDateTime )) )
  49         return true;
  50     else
  51         return false;
  52 }
  53
  54 bool DateTime::operator >=( const DateTime& rDateTime ) const
  55 {
  56     if ( (Date::operator>( rDateTime )) ||
  57          (Date::operator==( rDateTime ) && tools::Time::operator>=( rDateTime )) )
  58         return true;
  59     else
  60         return false;
  61 }
  62
  63 bool DateTime::operator <=( const DateTime& rDateTime ) const
  64 {
  65     if ( (Date::operator<( rDateTime )) ||
  66          (Date::operator==( rDateTime ) && tools::Time::operator<=( rDateTime )) )
  67         return true;
  68     else
  69         return false;
  70 }
  71
  72 long DateTime::GetSecFromDateTime( const Date& rDate ) const
  73 {
  74     if ( Date::operator<( rDate ) )
  75         return 0;
  76     else
  77     {
  78         long nSec = Date( *this ) - rDate;
  79         nSec *= 24UL*60*60;
  80         long nHour = GetHour();
  81         long nMin  = GetMin();
  82         nSec += (nHour*3600)+(nMin*60)+GetSec();
  83         return nSec;
  84     }
  85 }
  86
  87 DateTime& DateTime::operator +=( const tools::Time& rTime )
  88 {
  89     tools::Time aTime = *this;
  90     aTime += rTime;
  91     sal_uInt16 nHours = aTime.GetHour();
  92     if ( aTime.GetTime() > 0 )
  93     {
  94         while ( nHours >= 24 )
  95         {
  96             Date::operator++();
  97             nHours -= 24;
  98         }
  99         aTime.SetHour( nHours );
 100     }
 101     else if ( aTime.GetTime() != 0 )
 102     {
 103         while ( nHours >= 24 )
 104         {
 105             Date::operator--();
 106             nHours -= 24;
 107         }
 108         Date::operator--();
 109         aTime = Time( 24, 0, 0 )+aTime;
 110     }
 111     tools::Time::operator=( aTime );
 112
 113     return *this;
 114 }
 115
 116 DateTime& DateTime::operator -=( const tools::Time& rTime )
 117 {
 118     tools::Time aTime = *this;
 119     aTime -= rTime;
 120     sal_uInt16 nHours = aTime.GetHour();
 121     if ( aTime.GetTime() > 0 )
 122     {
 123         while ( nHours >= 24 )
 124         {
 125             Date::operator++();
 126             nHours -= 24;
 127         }
 128         aTime.SetHour( nHours );
 129     }
 130     else if ( aTime.GetTime() != 0 )
 131     {
 132         while ( nHours >= 24 )
 133         {
 134             Date::operator--();
 135             nHours -= 24;
 136         }
 137         Date::operator--();
 138         aTime = Time( 24, 0, 0 )+aTime;
 139     }
 140     tools::Time::operator=( aTime );
 141
 142     return *this;
 143 }
 144
 145 DateTime operator +( const DateTime& rDateTime, long nDays )
 146 {
 147     DateTime aDateTime( rDateTime );
 148     aDateTime += nDays;
 149     return aDateTime;
 150 }
 151
 152 DateTime operator -( const DateTime& rDateTime, long nDays )
 153 {
 154     DateTime aDateTime( rDateTime );
 155     aDateTime -= nDays;
 156     return aDateTime;
 157 }
 158
 159 DateTime operator +( const DateTime& rDateTime, const tools::Time& rTime )
 160 {
 161     DateTime aDateTime( rDateTime );
 162     aDateTime += rTime;
 163     return aDateTime;
 164 }
 165
 166 DateTime operator -( const DateTime& rDateTime, const tools::Time& rTime )
 167 {
 168     DateTime aDateTime( rDateTime );
 169     aDateTime -= rTime;
 170     return aDateTime;
 171 }
 172
 173 DateTime& DateTime::operator +=( double fTimeInDays )
 174 {
 175     double fInt, fFrac;
 176     if ( fTimeInDays < 0.0 )
 177     {
 178         fInt = ::rtl::math::approxCeil( fTimeInDays );
 179         fFrac = fInt <= fTimeInDays ? 0.0 : fTimeInDays - fInt;
 180     }
 181     else
 182     {
 183         fInt = ::rtl::math::approxFloor( fTimeInDays );
 184         fFrac = fInt >= fTimeInDays ? 0.0 : fTimeInDays - fInt;
 185     }
 186     Date::operator+=( long(fInt) );     // full days
 187     if ( fFrac )
 188     {
 189         tools::Time aTime(0);  // default ctor calls system time, we don't need that
 190         fFrac *= ::tools::Time::nanoSecPerDay;   // time expressed in nanoseconds
 191         aTime.MakeTimeFromNS( static_cast<sal_Int64>(fFrac) );    // method handles negative ns
 192         operator+=( aTime );
 193     }
 194     return *this;
 195 }
 196
 197 DateTime operator +( const DateTime& rDateTime, double fTimeInDays )
 198 {
 199     DateTime aDateTime( rDateTime );
 200     aDateTime += fTimeInDays;
 201     return aDateTime;
 202 }
 203
 204 double operator -( const DateTime& rDateTime1, const DateTime& rDateTime2 )
 205 {
 206     long nDays = (const Date&) rDateTime1 - (const Date&) rDateTime2;
 207     sal_Int64 nTime = rDateTime1.GetNSFromTime() - rDateTime2.GetNSFromTime();
 208     if ( nTime )
 209     {
 210         double fTime = double(nTime);
 211         fTime /= ::tools::Time::nanoSecPerDay; // convert from nanoseconds to fraction
 212         if ( nDays < 0 && fTime > 0.0 )
 213             fTime = 1.0 - fTime;
 214         return double(nDays) + fTime;
 215     }
 216     return double(nDays);
 217 }
 218
 219 void DateTime::GetWin32FileDateTime( sal_uInt32 & rLower, sal_uInt32 & rUpper )
 220 {
 221     const sal_Int64 a100nPerSecond = SAL_CONST_INT64( 10000000 );
 222     const sal_Int64 a100nPerDay = a100nPerSecond * sal_Int64( 60 * 60 * 24 );
 223
 224     sal_Int64 nYears = GetYear() - 1601;
 225     sal_Int64 nDays =
 226         nYears * 365 +
 227         nYears / 4 - nYears / 100 + nYears / 400 +
 228         GetDayOfYear() - 1;
 229
 230     sal_Int64 aTime =
 231         a100nPerDay * nDays +
 232         GetNSFromTime()/100;
 233
 234     rLower = sal_uInt32( aTime % SAL_CONST_UINT64( 0x100000000 ) );
 235     rUpper = sal_uInt32( aTime / SAL_CONST_UINT64( 0x100000000 ) );
 236 }
 237
 238 DateTime DateTime::CreateFromWin32FileDateTime( const sal_uInt32 & rLower, const sal_uInt32 & rUpper )
 239 {
 240     const sal_Int64 a100nPerSecond = SAL_CONST_INT64( 10000000 );
 241     const sal_Int64 a100nPerDay = a100nPerSecond * sal_Int64( 60 * 60 * 24 );
 242
 243     sal_Int64 aTime = sal_Int64(
 244             sal_uInt64( rUpper ) * SAL_CONST_UINT64( 0x100000000 ) +
 245             sal_uInt64( rLower ) );
 246
 247     sal_Int64 nDays = aTime / a100nPerDay;
 248     sal_Int64 nYears =
 249         ( nDays -
 250           ( nDays / ( 4 * 365 ) ) +
 251           ( nDays / ( 100 * 365 ) ) -
 252           ( nDays / ( 400 * 365 ) ) ) / 365;
 253     nDays -= nYears * 365 + nYears / 4 - nYears / 100 + nYears / 400;
 254
 255     sal_uInt16 nMonths = 0;
 256     for( sal_Int64 nDaysCount = nDays; nDaysCount >= 0; )
 257     {
 258         nDays = nDaysCount;
 259         nMonths ++;
 260         nDaysCount -= Date(
 261             1, nMonths, sal::static_int_cast< sal_uInt16 >(1601 + nYears) ).
 262             GetDaysInMonth();
 263     }
 264
 265     Date _aDate(
 266         (sal_uInt16)( nDays + 1 ), nMonths,
 267         sal::static_int_cast< sal_uInt16 >(nYears + 1601) );
 268     tools::Time _aTime( sal_uIntPtr( ( aTime / ( a100nPerSecond * 60 * 60 ) ) % sal_Int64( 24 ) ),
 269                  sal_uIntPtr( ( aTime / ( a100nPerSecond * 60 ) )      % sal_Int64( 60 ) ),
 270                  sal_uIntPtr( ( aTime / ( a100nPerSecond ) )           % sal_Int64( 60 ) ),
 271                  (aTime % a100nPerSecond) * 100 );
 272
 273     return DateTime( _aDate, _aTime );
 274 }
 275
 276 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */