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/*
* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
* Copyright (C) 2008-2021 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#pragma once
#include "InternalFunction.h"
namespace JSC {
class DatePrototype;
class GetterSetter;
class DateConstructor final : public InternalFunction {
public:
typedef InternalFunction Base;
static constexpr unsigned StructureFlags = Base::StructureFlags | HasStaticPropertyTable;
static DateConstructor* create(VM& vm, Structure* structure, DatePrototype* datePrototype)
{
DateConstructor* constructor = new (NotNull, allocateCell<DateConstructor>(vm)) DateConstructor(vm, structure);
constructor->finishCreation(vm, datePrototype);
return constructor;
}
DECLARE_INFO;
inline static Structure* createStructure(VM&, JSGlobalObject*, JSValue);
private:
DateConstructor(VM&, Structure*);
void finishCreation(VM&, DatePrototype*);
};
STATIC_ASSERT_ISO_SUBSPACE_SHARABLE(DateConstructor, InternalFunction);
JSObject* constructDate(JSGlobalObject*, JSValue newTarget, const ArgList&);
JSValue dateNowImpl();
// https://tc39.es/ecma262/#sec-makeday
constexpr static inline double makeDay(double year, double month, double date)
{
double additionalYears = std::floor(month / 12);
double ym = year + additionalYears;
if (!std::isfinite(ym))
return PNaN;
double mm = month - additionalYears * 12;
int32_t yearInt32 = toInt32(ym);
int32_t monthInt32 = toInt32(mm);
if (yearInt32 != ym || monthInt32 != mm)
return PNaN;
double days = dateToDaysFrom1970(yearInt32, monthInt32, 1);
return days + date - 1;
}
// https://tc39.es/ecma262/#sec-makedate
constexpr static inline double makeDate(double day, double time)
{
#if COMPILER(CLANG)
#pragma STDC FP_CONTRACT OFF
#endif
return (day * msPerDay) + time;
}
// https://tc39.es/ecma262/#sec-maketime
constexpr static inline double makeTime(double hour, double min, double sec, double ms)
{
#if COMPILER(CLANG)
#pragma STDC FP_CONTRACT OFF
#endif
return (((hour * msPerHour) + min * msPerMinute) + sec * msPerSecond) + ms;
}
} // namespace JSC
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