The Tor Browser / file comparison
comparison: dom/xslt/xpath/txBooleanExpr.cpp
dom/xslt/xpath/txBooleanExpr.cpp
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
equal
deleted
inserted
replaced
| -1:000000000000 | 0:05bdc77238ee |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 | |
| 7 /** | |
| 8 * Represents a BooleanExpr, a binary expression that | |
| 9 * performs a boolean operation between its lvalue and rvalue. | |
| 10 **/ | |
| 11 | |
| 12 #include "txExpr.h" | |
| 13 #include "txIXPathContext.h" | |
| 14 | |
| 15 /** | |
| 16 * Evaluates this Expr based on the given context node and processor state | |
| 17 * @param context the context node for evaluation of this Expr | |
| 18 * @param ps the ContextState containing the stack information needed | |
| 19 * for evaluation | |
| 20 * @return the result of the evaluation | |
| 21 **/ | |
| 22 nsresult | |
| 23 BooleanExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult) | |
| 24 { | |
| 25 *aResult = nullptr; | |
| 26 | |
| 27 bool lval; | |
| 28 nsresult rv = leftExpr->evaluateToBool(aContext, lval); | |
| 29 NS_ENSURE_SUCCESS(rv, rv); | |
| 30 | |
| 31 // check for early decision | |
| 32 if (op == OR && lval) { | |
| 33 aContext->recycler()->getBoolResult(true, aResult); | |
| 34 | |
| 35 return NS_OK; | |
| 36 } | |
| 37 if (op == AND && !lval) { | |
| 38 aContext->recycler()->getBoolResult(false, aResult); | |
| 39 | |
| 40 return NS_OK; | |
| 41 } | |
| 42 | |
| 43 bool rval; | |
| 44 rv = rightExpr->evaluateToBool(aContext, rval); | |
| 45 NS_ENSURE_SUCCESS(rv, rv); | |
| 46 | |
| 47 // just use rval, since we already checked lval | |
| 48 aContext->recycler()->getBoolResult(rval, aResult); | |
| 49 | |
| 50 return NS_OK; | |
| 51 } //-- evaluate | |
| 52 | |
| 53 TX_IMPL_EXPR_STUBS_2(BooleanExpr, BOOLEAN_RESULT, leftExpr, rightExpr) | |
| 54 | |
| 55 bool | |
| 56 BooleanExpr::isSensitiveTo(ContextSensitivity aContext) | |
| 57 { | |
| 58 return leftExpr->isSensitiveTo(aContext) || | |
| 59 rightExpr->isSensitiveTo(aContext); | |
| 60 } | |
| 61 | |
| 62 #ifdef TX_TO_STRING | |
| 63 void | |
| 64 BooleanExpr::toString(nsAString& str) | |
| 65 { | |
| 66 if ( leftExpr ) leftExpr->toString(str); | |
| 67 else str.AppendLiteral("null"); | |
| 68 | |
| 69 switch ( op ) { | |
| 70 case OR: | |
| 71 str.AppendLiteral(" or "); | |
| 72 break; | |
| 73 default: | |
| 74 str.AppendLiteral(" and "); | |
| 75 break; | |
| 76 } | |
| 77 if ( rightExpr ) rightExpr->toString(str); | |
| 78 else str.AppendLiteral("null"); | |
| 79 | |
| 80 } | |
| 81 #endif |
