michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "txExpr.h"
michael@0: #include "txIXPathContext.h"
michael@0: 
michael@0: /*
michael@0:  * Evaluates this Expr based on the given context node and processor state
michael@0:  * @param context the context node for evaluation of this Expr
michael@0:  * @param ps the ContextState containing the stack information needed
michael@0:  * for evaluation.
michael@0:  * @return the result of the evaluation.
michael@0:  */
michael@0: nsresult
michael@0: UnaryExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult)
michael@0: {
michael@0:     *aResult = nullptr;
michael@0: 
michael@0:     nsRefPtr<txAExprResult> exprRes;
michael@0:     nsresult rv = expr->evaluate(aContext, getter_AddRefs(exprRes));
michael@0:     NS_ENSURE_SUCCESS(rv, rv);
michael@0: 
michael@0:     double value = exprRes->numberValue();
michael@0: #ifdef HPUX
michael@0:     /*
michael@0:      * Negation of a zero doesn't produce a negative
michael@0:      * zero on HPUX. Perform the operation by multiplying with
michael@0:      * -1.
michael@0:      */
michael@0:     return aContext->recycler()->getNumberResult(-1 * value, aResult);
michael@0: #else
michael@0:     return aContext->recycler()->getNumberResult(-value, aResult);
michael@0: #endif
michael@0: }
michael@0: 
michael@0: TX_IMPL_EXPR_STUBS_1(UnaryExpr, NODESET_RESULT, expr)
michael@0: 
michael@0: bool
michael@0: UnaryExpr::isSensitiveTo(ContextSensitivity aContext)
michael@0: {
michael@0:     return expr->isSensitiveTo(aContext);
michael@0: }
michael@0: 
michael@0: #ifdef TX_TO_STRING
michael@0: void
michael@0: UnaryExpr::toString(nsAString& str)
michael@0: {
michael@0:     if (!expr)
michael@0:         return;
michael@0:     str.Append(char16_t('-'));
michael@0:     expr->toString(str);
michael@0: }
michael@0: #endif