15c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)/* 25c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Copyright (C) 2011 Google Inc. All rights reserved. 35c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 45c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Redistribution and use in source and binary forms, with or without 55c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * modification, are permitted provided that the following conditions are 65c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * met: 75c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 85c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * * Redistributions of source code must retain the above copyright 95c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * notice, this list of conditions and the following disclaimer. 105c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * * Redistributions in binary form must reproduce the above 115c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * copyright notice, this list of conditions and the following disclaimer 125c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * in the documentation and/or other materials provided with the 135c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * distribution. 145c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * * Neither the name of Google Inc. nor the names of its 155c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * contributors may be used to endorse or promote products derived from 165c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * this software without specific prior written permission. 175c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 185c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 195c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 205c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 215c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 225c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 235c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 245c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 255c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 265c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 275c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 285c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 295c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) */ 305c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 315c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "config.h" 32bfe3590b1806e3ff18f46ee3af5d4b83078f305aTorne (Richard Coles)#include "platform/CalculationValue.h" 335c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 345c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include <limits> 355c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 365c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)namespace WebCore { 375c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 385c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)float CalcExpressionBinaryOperation::evaluate(float maxValue) const 395c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 405c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) float left = m_leftSide->evaluate(maxValue); 415c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) float right = m_rightSide->evaluate(maxValue); 425c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) switch (m_operator) { 435c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) case CalcAdd: 445c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return left + right; 455c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) case CalcSubtract: 465c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return left - right; 475c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) case CalcMultiply: 485c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return left * right; 495c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) case CalcDivide: 505c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (!right) 515c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return std::numeric_limits<float>::quiet_NaN(); 525c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return left / right; 535c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 545c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ASSERT_NOT_REACHED(); 555c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return std::numeric_limits<float>::quiet_NaN(); 565c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 575c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 581e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)PassRefPtr<CalculationValue> CalculationValue::create(PassOwnPtr<CalcExpressionNode> value, ValueRange range) 595c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 605c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return adoptRef(new CalculationValue(value, range)); 615c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 625c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 635c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)float CalculationValue::evaluate(float maxValue) const 645c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 655c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) float result = m_value->evaluate(maxValue); 6602772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch // FIXME calc https://webkit.org/b/80411 : result is NaN when there is a division 6702772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch // by zero which isn't found at parse time. 68926b001d589ce2f10facb93dd4b87578ea35a855Torne (Richard Coles) if (std::isnan(result)) 695c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return 0; 705c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return m_isNonNegative && result < 0 ? 0 : result; 715c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 725c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 735c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} // namespace WebCore 74