1 /*

     2  *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)

     3  *  Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.

     4  *

     5  *  This library is free software; you can redistribute it and/or

     6  *  modify it under the terms of the GNU Lesser General Public

     7  *  License as published by the Free Software Foundation; either

     8  *  version 2 of the License, or (at your option) any later version.

     9  *

    10  *  This library is distributed in the hope that it will be useful,

    11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of

    12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    13  *  Lesser General Public License for more details.

    14  *

    15  *  You should have received a copy of the GNU Lesser General Public

    16  *  License along with this library; if not, write to the Free Software

    17  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301

    18  *  USA

    19  *

    20  */

    21 

    22 #include "config.h"

    23 #include "DateInstance.h"

    24 

    25 #include "JSGlobalObject.h"

    26 

    27 #include <math.h>

    28 #include <wtf/DateMath.h>

    29 #include <wtf/MathExtras.h>

    30 

    31 using namespace WTF;

    32 

    33 namespace JSC {

    34 

    35 const ClassInfo DateInstance::info = {"Date", 0, 0, 0};

    36 

    37 DateInstance::DateInstance(ExecState* exec, NonNullPassRefPtr<Structure> structure)

    38     : JSWrapperObject(structure)

    39 {

    40     setInternalValue(jsNaN(exec));

    41 }

    42 

    43 DateInstance::DateInstance(ExecState* exec, NonNullPassRefPtr<Structure> structure, double time)

    44     : JSWrapperObject(structure)

    45 {

    46     setInternalValue(jsNumber(exec, timeClip(time)));

    47 }

    48 

    49 DateInstance::DateInstance(ExecState* exec, double time)

    50     : JSWrapperObject(exec->lexicalGlobalObject()->dateStructure())

    51 {

    52     setInternalValue(jsNumber(exec, timeClip(time)));

    53 }

    54 

    55 const GregorianDateTime* DateInstance::calculateGregorianDateTime(ExecState* exec) const

    56 {

    57     double milli = internalNumber();

    58     if (isnan(milli))

    59         return 0;

    60 

    61     if (!m_data)

    62         m_data = exec->globalData().dateInstanceCache.add(milli);

    63 

    64     if (m_data->m_gregorianDateTimeCachedForMS != milli) {

    65         msToGregorianDateTime(exec, milli, false, m_data->m_cachedGregorianDateTime);

    66         m_data->m_gregorianDateTimeCachedForMS = milli;

    67     }

    68     return &m_data->m_cachedGregorianDateTime;

    69 }

    70 

    71 const GregorianDateTime* DateInstance::calculateGregorianDateTimeUTC(ExecState* exec) const

    72 {

    73     double milli = internalNumber();

    74     if (isnan(milli))

    75         return 0;

    76 

    77     if (!m_data)

    78         m_data = exec->globalData().dateInstanceCache.add(milli);

    79 

    80     if (m_data->m_gregorianDateTimeUTCCachedForMS != milli) {

    81         msToGregorianDateTime(exec, milli, true, m_data->m_cachedGregorianDateTimeUTC);

    82         m_data->m_gregorianDateTimeUTCCachedForMS = milli;

    83     }

    84     return &m_data->m_cachedGregorianDateTimeUTC;

    85 }

    86 

    87 } // namespace JSC