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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* 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.
*
* The Initial Developer of the Original Code is The MITRE Corporation.
* Portions created by MITRE are Copyright (C) 1999 The MITRE Corporation.
*
* Portions created by Keith Visco as a Non MITRE employee,
* (C) 1999 Keith Visco. All Rights Reserved.
*
* Contributor(s):
*
* Olivier Gerardin, ogerardin@vo.lu
* -- original author.
*
* Nisheeth Ranjan, nisheeth@netscape.com
* -- implemented rint function, which was not available on Windows.
*
*/
/*
* NumberFunctionCall
* A representation of the XPath Number funtions
*/
#include "FunctionLib.h"
#include <math.h>
#include "txNodeSet.h"
#include "txAtoms.h"
#include "txIXPathContext.h"
/*
* Creates a NumberFunctionCall of the given type
*/
NumberFunctionCall::NumberFunctionCall(NumberFunctions aType)
: mType(aType)
{
}
/*
* 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
NumberFunctionCall::evaluate(txIEvalContext* aContext, txAExprResult** aResult)
{
*aResult = nsnull;
txListIterator iter(¶ms);
if (mType == NUMBER) {
if (!requireParams(0, 1, aContext))
return NS_ERROR_XPATH_BAD_ARGUMENT_COUNT;
}
else {
if (!requireParams(1, 1, aContext))
return NS_ERROR_XPATH_BAD_ARGUMENT_COUNT;
}
switch (mType) {
case CEILING:
{
double dbl = evaluateToNumber((Expr*)iter.next(), aContext);
if (!Double::isNaN(dbl) && !Double::isInfinite(dbl)) {
if (Double::isNeg(dbl) && dbl > -1) {
dbl *= 0;
}
else {
dbl = ceil(dbl);
}
}
return aContext->recycler()->getNumberResult(dbl, aResult);
}
case FLOOR:
{
double dbl = evaluateToNumber((Expr*)iter.next(), aContext);
if (!Double::isNaN(dbl) &&
!Double::isInfinite(dbl) &&
!(dbl == 0 && Double::isNeg(dbl))) {
dbl = floor(dbl);
}
return aContext->recycler()->getNumberResult(dbl, aResult);
}
case ROUND:
{
double dbl = evaluateToNumber((Expr*)iter.next(), aContext);
if (!Double::isNaN(dbl) && !Double::isInfinite(dbl)) {
if (Double::isNeg(dbl) && dbl >= -0.5) {
dbl *= 0;
}
else {
dbl = floor(dbl + 0.5);
}
}
return aContext->recycler()->getNumberResult(dbl, aResult);
}
case SUM:
{
nsRefPtr<txNodeSet> nodes;
nsresult rv = evaluateToNodeSet((Expr*)iter.next(), aContext,
getter_AddRefs(nodes));
NS_ENSURE_SUCCESS(rv, rv);
double res = 0;
PRInt32 i;
for (i = 0; i < nodes->size(); ++i) {
nsAutoString resultStr;
txXPathNodeUtils::appendNodeValue(nodes->get(i), resultStr);
res += Double::toDouble(resultStr);
}
return aContext->recycler()->getNumberResult(res, aResult);
}
case NUMBER:
{
double res;
if (iter.hasNext()) {
res = evaluateToNumber((Expr*)iter.next(), aContext);
}
else {
nsAutoString resultStr;
txXPathNodeUtils::appendNodeValue(aContext->getContextNode(),
resultStr);
res = Double::toDouble(resultStr);
}
return aContext->recycler()->getNumberResult(res, aResult);
}
}
aContext->receiveError(NS_LITERAL_STRING("Internal error"),
NS_ERROR_UNEXPECTED);
return NS_ERROR_UNEXPECTED;
}
nsresult NumberFunctionCall::getNameAtom(nsIAtom** aAtom)
{
switch (mType) {
case NUMBER:
{
*aAtom = txXPathAtoms::number;
break;
}
case ROUND:
{
*aAtom = txXPathAtoms::round;
break;
}
case FLOOR:
{
*aAtom = txXPathAtoms::floor;
break;
}
case CEILING:
{
*aAtom = txXPathAtoms::ceiling;
break;
}
case SUM:
{
*aAtom = txXPathAtoms::sum;
break;
}
default:
{
*aAtom = 0;
return NS_ERROR_FAILURE;
}
}
NS_ADDREF(*aAtom);
return NS_OK;
}
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