128 lines
4.6 KiB
C++
128 lines
4.6 KiB
C++
/*
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* Copyright (C) 2021 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "CalcExpressionOperation.h"
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#include <wtf/text/TextStream.h>
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namespace WebCore {
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float CalcExpressionOperation::evaluate(float maxValue) const
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{
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switch (m_operator) {
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case CalcOperator::Add: {
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float sum = 0;
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for (auto& child : m_children)
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sum += child->evaluate(maxValue);
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return sum;
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}
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case CalcOperator::Subtract: {
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// FIXME
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ASSERT(m_children.size() == 2);
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float left = m_children[0]->evaluate(maxValue);
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float right = m_children[1]->evaluate(maxValue);
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return left - right;
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}
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case CalcOperator::Multiply: {
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float product = 1;
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for (auto& child : m_children)
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product *= child->evaluate(maxValue);
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return product;
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}
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case CalcOperator::Divide: {
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// FIXME
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ASSERT(m_children.size() == 1 || m_children.size() == 2);
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if (m_children.size() == 1)
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return std::numeric_limits<float>::quiet_NaN();
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float left = m_children[0]->evaluate(maxValue);
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float right = m_children[1]->evaluate(maxValue);
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return left / right;
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}
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case CalcOperator::Min: {
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if (m_children.isEmpty())
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return std::numeric_limits<float>::quiet_NaN();
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float minimum = m_children[0]->evaluate(maxValue);
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for (auto& child : m_children)
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minimum = std::min(minimum, child->evaluate(maxValue));
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return minimum;
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}
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case CalcOperator::Max: {
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if (m_children.isEmpty())
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return std::numeric_limits<float>::quiet_NaN();
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float maximum = m_children[0]->evaluate(maxValue);
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for (auto& child : m_children)
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maximum = std::max(maximum, child->evaluate(maxValue));
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return maximum;
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}
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case CalcOperator::Clamp: {
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if (m_children.size() != 3)
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return std::numeric_limits<float>::quiet_NaN();
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float min = m_children[0]->evaluate(maxValue);
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float value = m_children[1]->evaluate(maxValue);
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float max = m_children[2]->evaluate(maxValue);
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return std::max(min, std::min(value, max));
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}
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}
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ASSERT_NOT_REACHED();
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return std::numeric_limits<float>::quiet_NaN();
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}
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bool CalcExpressionOperation::operator==(const CalcExpressionNode& other) const
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{
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return is<CalcExpressionOperation>(other) && *this == downcast<CalcExpressionOperation>(other);
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}
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bool operator==(const CalcExpressionOperation& a, const CalcExpressionOperation& b)
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{
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if (a.getOperator() != b.getOperator() || a.destinationCategory() != b.destinationCategory())
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return false;
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if (a.children().size() != b.children().size())
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return false;
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for (unsigned i = 0; i < a.children().size(); ++i) {
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if (!(*a.children()[i] == *b.children()[i]))
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return false;
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}
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return true;
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}
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void CalcExpressionOperation::dump(TextStream& ts) const
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{
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if (m_operator == CalcOperator::Min || m_operator == CalcOperator::Max) {
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ts << m_operator << "(";
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size_t childrenCount = m_children.size();
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for (size_t i = 0; i < childrenCount; i++) {
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ts << m_children[i].get();
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if (i < childrenCount - 1)
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ts << ", ";
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}
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ts << ")";
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} else
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ts << m_children[0].get() << " " << m_operator << " " << m_children[1].get();
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}
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}
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