/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "txExpr.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

UnaryExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult)

{

    *aResult = nullptr;

    RefPtr<txAExprResult> exprRes;

    nsresult rv = expr->evaluate(aContext, getter_AddRefs(exprRes));

    NS_ENSURE_SUCCESS(rv, rv);

    double value = exprRes->numberValue();

#ifdef HPUX

    /*

     * Negation of a zero doesn't produce a negative

     * zero on HPUX. Perform the operation by multiplying with

     * -1.

     */

    return aContext->recycler()->getNumberResult(-1 * value, aResult);

#else

    return aContext->recycler()->getNumberResult(-value, aResult);

#endif

}

TX_IMPL_EXPR_STUBS_1(UnaryExpr, NODESET_RESULT, expr)

bool

UnaryExpr::isSensitiveTo(ContextSensitivity aContext)

{

    return expr->isSensitiveTo(aContext);

}

#ifdef TX_TO_STRING

void

UnaryExpr::toString(nsAString& str)

{

    if (!expr)

        return;

    str.Append(char16_t('-'));

    expr->toString(str);

}

#endif