/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is TransforMiiX XSLT processor code.
 *
 * The Initial Developer of the Original Code is
 * The MITRE Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1999
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Keith Visco <kvisco@ziplink.net> (Original Author)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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/**
 * NumberResult
 * Represents the a number as the result of evaluating an Expr
**/

#include "txExprResult.h"

/**
 * Default Constructor
**/

/**
 * Creates a new NumberResult with the value of the given double parameter
 * @param dbl the double to use for initialization of this NumberResult's value
**/
NumberResult::NumberResult(double aValue, txResultRecycler* aRecycler)
    : txAExprResult(aRecycler), value(aValue)
{
} //-- NumberResult

/*
 * Virtual Methods from ExprResult
*/

short NumberResult::getResultType() {
    return txAExprResult::NUMBER;
} //-- getResultType

void
NumberResult::stringValue(nsString& aResult)
{
    Double::toString(value, aResult);
}

const nsString*
NumberResult::stringValuePointer()
{
    return nsnull;
}

MBool NumberResult::booleanValue() {
  // OG+
  // As per the XPath spec, the boolean value of a number is true if and only if
  // it is neither positive 0 nor negative 0 nor NaN
  return (MBool)(value != 0.0 && !Double::isNaN(value));
  // OG-
} //-- booleanValue

double NumberResult::numberValue() {
    return this->value;
} //-- numberValue