104 lines
3.3 KiB
C++
104 lines
3.3 KiB
C++
/*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is TransforMiiX XSLT processor.
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*
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* The Initial Developer of the Original Code is The MITRE Corporation.
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* Portions created by MITRE are Copyright (C) 1999 The MITRE Corporation.
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*
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* Portions created by Keith Visco as a Non MITRE employee,
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* (C) 1999 Keith Visco. All Rights Reserved.
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*
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* Contributor(s):
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* Keith Visco, kvisco@ziplink.net
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* -- original author.
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*
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* $Id: BooleanFunctionCall.cpp,v 1.3 2000-04-14 04:24:28 kvisco%ziplink.net Exp $
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*/
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#include "FunctionLib.h"
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/**
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* Creates a default BooleanFunctionCall, which always evaluates to False
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* @author <A HREF="mailto:kvisco@ziplink.net">Keith Visco</A>
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* @version $Revision: 1.3 $ $Date: 2000-04-14 04:24:28 $
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**/
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BooleanFunctionCall::BooleanFunctionCall() : FunctionCall(XPathNames::FALSE_FN) {
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this->type = TX_FALSE;
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} //-- BooleanFunctionCall
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/**
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* Creates a BooleanFunctionCall of the given type
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**/
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BooleanFunctionCall::BooleanFunctionCall(short type) : FunctionCall()
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{
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switch ( type ) {
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case TX_BOOLEAN :
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FunctionCall::setName(XPathNames::BOOLEAN_FN);
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break;
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case TX_NOT :
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FunctionCall::setName(XPathNames::NOT_FN);
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break;
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case TX_TRUE :
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FunctionCall::setName(XPathNames::TRUE_FN);
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break;
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default:
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FunctionCall::setName(XPathNames::FALSE_FN);
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break;
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}
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this->type = type;
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} //-- BooleanFunctionCall
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/**
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* Evaluates this Expr based on the given context node and processor state
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* @param context the context node for evaluation of this Expr
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* @param ps the ContextState containing the stack information needed
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* for evaluation
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* @return the result of the evaluation
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**/
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ExprResult* BooleanFunctionCall::evaluate(Node* context, ContextState* cs) {
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BooleanResult* result = new BooleanResult();
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ListIterator* iter = params.iterator();
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int argc = params.getLength();
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Expr* param = 0;
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String err;
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switch ( type ) {
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case TX_BOOLEAN :
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if ( requireParams(1,1,cs) ) {
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param = (Expr*)iter->next();
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ExprResult* exprResult = param->evaluate(context, cs);
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result->setValue(exprResult->booleanValue());
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delete exprResult;
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}
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break;
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case TX_NOT :
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if ( requireParams(1,1,cs) ) {
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param = (Expr*)iter->next();
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ExprResult* exprResult = param->evaluate(context, cs);
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result->setValue(!exprResult->booleanValue());
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delete exprResult;
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}
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break;
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case TX_TRUE :
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result->setValue(MB_TRUE);
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break;
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default:
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result->setValue(MB_FALSE);
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break;
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}
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delete iter;
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return result;
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} //-- evaluate
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