RetroZilla/extensions/transformiix/source/xpath/FunctionCall.cpp

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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 ***** */
#include "FunctionLib.h"
#include "ExprResult.h"
#include "nsIAtom.h"
#include "txIXPathContext.h"
#include "txNodeSet.h"
/**
* This class represents a FunctionCall as defined by the XSL Working Draft
**/
FunctionCall::FunctionCall()
{
}
/**
* Destructor
**/
FunctionCall::~FunctionCall()
{
txListIterator iter(&params);
while (iter.hasNext()) {
delete (Expr*)iter.next();
}
} //-- ~FunctionCall
//------------------/
//- Public Methods -/
//------------------/
/**
* Adds the given parameter to this FunctionCall's parameter list
* @param expr the Expr to add to this FunctionCall's parameter list
*/
nsresult
FunctionCall::addParam(Expr* aExpr)
{
NS_ASSERTION(aExpr, "missing expression");
nsresult rv = params.add(aExpr);
if (NS_FAILED(rv)) {
delete aExpr;
}
return rv;
} //-- addParam
/*
* Evaluates the given Expression and converts its result to a String.
* The value is appended to the given destination String
*/
void FunctionCall::evaluateToString(Expr* aExpr, txIEvalContext* aContext,
nsAString& aDest)
{
NS_ASSERTION(aExpr, "missing expression");
nsRefPtr<txAExprResult> exprResult;
nsresult rv = aExpr->evaluate(aContext, getter_AddRefs(exprResult));
if (NS_FAILED(rv))
return;
exprResult->stringValue(aDest);
}
/*
* Evaluates the given Expression and converts its result to a number.
*/
// static
nsresult
FunctionCall::evaluateToNumber(Expr* aExpr, txIEvalContext* aContext,
double* aResult)
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{
NS_ASSERTION(aExpr, "missing expression");
nsRefPtr<txAExprResult> exprResult;
nsresult rv = aExpr->evaluate(aContext, getter_AddRefs(exprResult));
NS_ENSURE_SUCCESS(rv, rv);
*aResult = exprResult->numberValue();
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return NS_OK;
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}
/*
* Evaluates the given Expression and converts its result to a boolean.
*/
MBool FunctionCall::evaluateToBoolean(Expr* aExpr, txIEvalContext* aContext)
{
NS_ASSERTION(aExpr, "missing expression");
nsRefPtr<txAExprResult> exprResult;
nsresult rv = aExpr->evaluate(aContext, getter_AddRefs(exprResult));
if (NS_FAILED(rv))
return PR_FALSE;
return exprResult->booleanValue();
}
/*
* Evaluates the given Expression and converts its result to a NodeSet.
* If the result is not a NodeSet NULL is returned.
*/
nsresult
FunctionCall::evaluateToNodeSet(Expr* aExpr, txIEvalContext* aContext,
txNodeSet** aResult)
{
NS_ASSERTION(aExpr, "Missing expression to evaluate");
*aResult = nsnull;
nsRefPtr<txAExprResult> exprRes;
nsresult rv = aExpr->evaluate(aContext, getter_AddRefs(exprRes));
NS_ENSURE_SUCCESS(rv, rv);
if (exprRes->getResultType() != txAExprResult::NODESET) {
aContext->receiveError(NS_LITERAL_STRING("NodeSet expected as argument"), NS_ERROR_XSLT_NODESET_EXPECTED);
return NS_ERROR_XSLT_NODESET_EXPECTED;
}
*aResult =
NS_STATIC_CAST(txNodeSet*, NS_STATIC_CAST(txAExprResult*, exprRes));
NS_ADDREF(*aResult);
return NS_OK;
}
PRBool FunctionCall::requireParams(PRInt32 aParamCountMin,
PRInt32 aParamCountMax,
txIEvalContext* aContext)
{
PRInt32 argc = params.getLength();
if (argc < aParamCountMin ||
(aParamCountMax > -1 && argc > aParamCountMax)) {
nsAutoString err(NS_LITERAL_STRING("invalid number of parameters for function"));
#ifdef TX_TO_STRING
err.AppendLiteral(": ");
toString(err);
#endif
aContext->receiveError(err, NS_ERROR_XPATH_INVALID_ARG);
return PR_FALSE;
}
return PR_TRUE;
}
#ifdef TX_TO_STRING
void
FunctionCall::toString(nsAString& aDest)
{
nsCOMPtr<nsIAtom> functionNameAtom;
nsAutoString functionName;
if (NS_FAILED(getNameAtom(getter_AddRefs(functionNameAtom))) ||
NS_FAILED(functionNameAtom->ToString(functionName))) {
NS_ASSERTION(0, "Can't get function name.");
return;
}
aDest.Append(functionName);
aDest.Append(PRUnichar('('));
txListIterator iter(&params);
MBool addComma = MB_FALSE;
while (iter.hasNext()) {
if (addComma) {
aDest.Append(PRUnichar(','));
}
addComma = MB_TRUE;
Expr* expr = (Expr*)iter.next();
expr->toString(aDest);
}
aDest.Append(PRUnichar(')'));
}
#endif