dom/xslt/xpath/txNumberResult.cpp

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 /**
   7  * NumberResult
   8  * Represents the a number as the result of evaluating an Expr
   9  **/
  10
  11 #include "mozilla/FloatingPoint.h"
  12
  13 #include "txExprResult.h"
  14
  15 /**
  16  * Default Constructor
  17  **/
  18
  19 /**
  20  * Creates a new NumberResult with the value of the given double parameter
  21  * @param dbl the double to use for initialization of this NumberResult's value
  22  **/
  23 NumberResult::NumberResult(double aValue, txResultRecycler* aRecycler)
  24     : txAExprResult(aRecycler), value(aValue) {}  //-- NumberResult
  25
  26 /*
  27  * Virtual Methods from ExprResult
  28  */
  29
  30 short NumberResult::getResultType() {
  31   return txAExprResult::NUMBER;
  32 }  //-- getResultType
  33
  34 void NumberResult::stringValue(nsString& aResult) {
  35   txDouble::toString(value, aResult);
  36 }
  37
  38 const nsString* NumberResult::stringValuePointer() { return nullptr; }
  39
  40 bool NumberResult::booleanValue() {
  41   // OG+
  42   // As per the XPath spec, the boolean value of a number is true if and only if
  43   // it is neither positive 0 nor negative 0 nor NaN
  44   return (bool)(value != 0.0 && !std::isnan(value));
  45   // OG-
  46 }  //-- booleanValue
  47
  48 double NumberResult::numberValue() { return this->value; }  //-- numberValue