/*
* Copyright (C) 2011 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "platform/CalculationValue.h"
#include <limits>
namespace WebCore {
float CalcExpressionBinaryOperation::evaluate(float maxValue) const
{
float left = m_leftSide->evaluate(maxValue);
float right = m_rightSide->evaluate(maxValue);
switch (m_operator) {
case CalcAdd:
return left + right;
case CalcSubtract:
return left - right;
case CalcMultiply:
return left * right;
case CalcDivide:
if (!right)
return std::numeric_limits<float>::quiet_NaN();
return left / right;
}
ASSERT_NOT_REACHED();
return std::numeric_limits<float>::quiet_NaN();
}
PassRefPtr<CalculationValue> CalculationValue::create(PassOwnPtr<CalcExpressionNode> value, ValueRange range)
{
return adoptRef(new CalculationValue(value, range));
}
float CalculationValue::evaluate(float maxValue) const
{
float result = m_value->evaluate(maxValue);
// FIXME calc https://webkit.org/b/80411 : result is NaN when there is a division
// by zero which isn't found at parse time.
if (std::isnan(result))
return 0;
return m_isNonNegative && result < 0 ? 0 : result;
}
} // namespace WebCore