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/* -*- 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"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/**
* Represents a AdditiveExpr, an binary expression that
* performs an additive operation between it's lvalue and rvalue:
* + : addition
* - : subtraction
**/
#include "Expr.h"
#include "ExprResult.h"
#include "txIXPathContext.h"
/**
* Evaluates this Expr based on the given context node and processor state
* @param context the context node for evaluation of this Expr
* @param ps the ContextState containing the stack information needed
* for evaluation
* @return the result of the evaluation
**/
nsresult
AdditiveExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult)
{
*aResult = nsnull;
nsRefPtr<txAExprResult> exprRes;
nsresult rv = rightExpr->evaluate(aContext, getter_AddRefs(exprRes));
NS_ENSURE_SUCCESS(rv, rv);
double rightDbl = exprRes->numberValue();
rv = leftExpr->evaluate(aContext, getter_AddRefs(exprRes));
NS_ENSURE_SUCCESS(rv, rv);
double leftDbl = exprRes->numberValue();
double result = 0;
switch ( op ) {
case SUBTRACTION:
result = leftDbl - rightDbl;
break;
default:
result = leftDbl + rightDbl;
break;
}
return aContext->recycler()->getNumberResult(result, aResult);
} //-- evaluate
#ifdef TX_TO_STRING
void
AdditiveExpr::toString(nsAString& str)
{
if ( leftExpr ) leftExpr->toString(str);
else str.AppendLiteral("null");
switch ( op ) {
case SUBTRACTION:
str.AppendLiteral(" - ");
break;
default:
str.AppendLiteral(" + ");
break;
}
if ( rightExpr ) rightExpr->toString(str);
else str.AppendLiteral("null");
}
#endif
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