1 /* 2 * Copyright (C) 2011 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include "config.h" 32 #include "platform/CalculationValue.h" 33 34 #include <limits> 35 36 namespace WebCore { 37 38 float CalcExpressionBinaryOperation::evaluate(float maxValue) const 39 { 40 float left = m_leftSide->evaluate(maxValue); 41 float right = m_rightSide->evaluate(maxValue); 42 switch (m_operator) { 43 case CalcAdd: 44 return left + right; 45 case CalcSubtract: 46 return left - right; 47 case CalcMultiply: 48 return left * right; 49 case CalcDivide: 50 if (!right) 51 return std::numeric_limits<float>::quiet_NaN(); 52 return left / right; 53 } 54 ASSERT_NOT_REACHED(); 55 return std::numeric_limits<float>::quiet_NaN(); 56 } 57 58 PassRefPtr<CalculationValue> CalculationValue::create(PassOwnPtr<CalcExpressionNode> value, ValueRange range) 59 { 60 return adoptRef(new CalculationValue(value, range)); 61 } 62 63 float CalculationValue::evaluate(float maxValue) const 64 { 65 float result = m_value->evaluate(maxValue); 66 // FIXME calc https://webkit.org/b/80411 : result is NaN when there is a division 67 // by zero which isn't found at parse time. 68 if (std::isnan(result)) 69 return 0; 70 return m_isNonNegative && result < 0 ? 0 : result; 71 } 72 73 } // namespace WebCore 74
