| /* |
| * Copyright (C) 2011 Google Inc. All rights reserved. |
| * Copyright (C) 2014 Apple 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 |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "CalculationValue.h" |
| |
| #include "CalcExpressionNode.h" |
| #include <limits> |
| #include <wtf/text/TextStream.h> |
| |
| namespace WebCore { |
| |
| Ref<CalculationValue> CalculationValue::create(std::unique_ptr<CalcExpressionNode> value, ValueRange range) |
| { |
| return adoptRef(*new CalculationValue(WTFMove(value), range)); |
| } |
| |
| CalculationValue::CalculationValue(std::unique_ptr<CalcExpressionNode> expression, ValueRange range) |
| : m_expression(WTFMove(expression)) |
| , m_shouldClampToNonNegative(range == ValueRange::NonNegative) |
| { |
| } |
| |
| CalculationValue::~CalculationValue() = default; |
| |
| float CalculationValue::evaluate(float maxValue) const |
| { |
| float result = m_expression->evaluate(maxValue); |
| // FIXME: This test was originally needed when we did not detect division by zero at parse time. |
| // It's possible that this is now unneeded code and can be removed. |
| if (std::isnan(result)) |
| return 0; |
| return m_shouldClampToNonNegative && result < 0 ? 0 : result; |
| } |
| |
| bool operator==(const CalculationValue& a, const CalculationValue& b) |
| { |
| return a.expression() == b.expression(); |
| } |
| |
| TextStream& operator<<(TextStream& ts, const CalculationValue& value) |
| { |
| return ts << "calc(" << value.expression() << ")"; |
| } |
| |
| } // namespace WebCore |