michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /**
michael@0:  * NumberResult
michael@0:  * Represents the a number as the result of evaluating an Expr
michael@0: **/
michael@0: 
michael@0: #include "mozilla/FloatingPoint.h"
michael@0: 
michael@0: #include "txExprResult.h"
michael@0: 
michael@0: /**
michael@0:  * Default Constructor
michael@0: **/
michael@0: 
michael@0: /**
michael@0:  * Creates a new NumberResult with the value of the given double parameter
michael@0:  * @param dbl the double to use for initialization of this NumberResult's value
michael@0: **/
michael@0: NumberResult::NumberResult(double aValue, txResultRecycler* aRecycler)
michael@0:     : txAExprResult(aRecycler), value(aValue)
michael@0: {
michael@0: } //-- NumberResult
michael@0: 
michael@0: /*
michael@0:  * Virtual Methods from ExprResult
michael@0: */
michael@0: 
michael@0: short NumberResult::getResultType() {
michael@0:     return txAExprResult::NUMBER;
michael@0: } //-- getResultType
michael@0: 
michael@0: void
michael@0: NumberResult::stringValue(nsString& aResult)
michael@0: {
michael@0:     txDouble::toString(value, aResult);
michael@0: }
michael@0: 
michael@0: const nsString*
michael@0: NumberResult::stringValuePointer()
michael@0: {
michael@0:     return nullptr;
michael@0: }
michael@0: 
michael@0: bool NumberResult::booleanValue() {
michael@0:   // OG+
michael@0:   // As per the XPath spec, the boolean value of a number is true if and only if
michael@0:   // it is neither positive 0 nor negative 0 nor NaN
michael@0:   return (bool)(value != 0.0 && !mozilla::IsNaN(value));
michael@0:   // OG-
michael@0: } //-- booleanValue
michael@0: 
michael@0: double NumberResult::numberValue() {
michael@0:     return this->value;
michael@0: } //-- numberValue
michael@0: