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lightning-sunbird  0.9+nobinonly
AdditiveExpr.cpp
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00001 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
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00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is TransforMiiX XSLT processor code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * The MITRE Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1999
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *   Keith Visco <kvisco@ziplink.net> (Original Author)
00024  *
00025  * Alternatively, the contents of this file may be used under the terms of
00026  * either the GNU General Public License Version 2 or later (the "GPL"), or
00027  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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00037  * ***** END LICENSE BLOCK ***** */
00038 
00046 #include "Expr.h"
00047 #include "ExprResult.h"
00048 #include "txIXPathContext.h"
00049 
00057 nsresult
00058 AdditiveExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult)
00059 {
00060     *aResult = nsnull;
00061 
00062     nsRefPtr<txAExprResult> exprRes;
00063     nsresult rv = rightExpr->evaluate(aContext, getter_AddRefs(exprRes));
00064     NS_ENSURE_SUCCESS(rv, rv);
00065 
00066     double rightDbl = exprRes->numberValue();
00067 
00068     rv = leftExpr->evaluate(aContext, getter_AddRefs(exprRes));
00069     NS_ENSURE_SUCCESS(rv, rv);
00070 
00071     double leftDbl = exprRes->numberValue();
00072 
00073     double result = 0;
00074     switch ( op ) {
00075         case SUBTRACTION:
00076             result = leftDbl - rightDbl;
00077             break;
00078         default:
00079             result = leftDbl + rightDbl;
00080             break;
00081     }
00082 
00083     return aContext->recycler()->getNumberResult(result, aResult);
00084 } //-- evaluate
00085 
00086 #ifdef TX_TO_STRING
00087 void
00088 AdditiveExpr::toString(nsAString& str)
00089 {
00090     if ( leftExpr ) leftExpr->toString(str);
00091     else str.AppendLiteral("null");
00092 
00093     switch ( op ) {
00094         case SUBTRACTION:
00095             str.AppendLiteral(" - ");
00096             break;
00097         default:
00098             str.AppendLiteral(" + ");
00099             break;
00100     }
00101     if ( rightExpr ) rightExpr->toString(str);
00102     else str.AppendLiteral("null");
00103 
00104 }
00105 #endif
00106