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/*
* Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
* Copyright (C) 2001 Peter Kelly (pmk@post.com)
* Copyright (C) 2003, 2007, 2008 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "config.h"
#include "JSValue.h"
#include "JSFunction.h"
#include <wtf/MathExtras.h>
namespace JSC {
static const double D32 = 4294967296.0;
// ECMA 9.4
double JSValue::toInteger(ExecState* exec) const
{
if (isInt32Fast())
return getInt32Fast();
double d = toNumber(exec);
return isnan(d) ? 0.0 : trunc(d);
}
double JSValue::toIntegerPreserveNaN(ExecState* exec) const
{
if (isInt32Fast())
return getInt32Fast();
return trunc(toNumber(exec));
}
int32_t toInt32SlowCase(double d, bool& ok)
{
ok = true;
if (d >= -D32 / 2 && d < D32 / 2)
return static_cast<int32_t>(d);
if (isnan(d) || isinf(d)) {
ok = false;
return 0;
}
double d32 = fmod(trunc(d), D32);
if (d32 >= D32 / 2)
d32 -= D32;
else if (d32 < -D32 / 2)
d32 += D32;
return static_cast<int32_t>(d32);
}
uint32_t toUInt32SlowCase(double d, bool& ok)
{
ok = true;
if (d >= 0.0 && d < D32)
return static_cast<uint32_t>(d);
if (isnan(d) || isinf(d)) {
ok = false;
return 0;
}
double d32 = fmod(trunc(d), D32);
if (d32 < 0)
d32 += D32;
return static_cast<uint32_t>(d32);
}
} // namespace JSC
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