The Tor Browser / file comparison
comparison: dom/xslt/xpath/txNumberExpr.cpp
dom/xslt/xpath/txNumberExpr.cpp
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
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| -1:000000000000 | 0:19152bff5a8a |
|---|---|
| 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 #include "mozilla/FloatingPoint.h" | |
| 7 | |
| 8 #include "txExpr.h" | |
| 9 #include <math.h> | |
| 10 #include "txIXPathContext.h" | |
| 11 | |
| 12 nsresult | |
| 13 txNumberExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult) | |
| 14 { | |
| 15 *aResult = nullptr; | |
| 16 | |
| 17 nsRefPtr<txAExprResult> exprRes; | |
| 18 nsresult rv = mRightExpr->evaluate(aContext, getter_AddRefs(exprRes)); | |
| 19 NS_ENSURE_SUCCESS(rv, rv); | |
| 20 | |
| 21 double rightDbl = exprRes->numberValue(); | |
| 22 | |
| 23 rv = mLeftExpr->evaluate(aContext, getter_AddRefs(exprRes)); | |
| 24 NS_ENSURE_SUCCESS(rv, rv); | |
| 25 | |
| 26 double leftDbl = exprRes->numberValue(); | |
| 27 double result = 0; | |
| 28 | |
| 29 switch (mOp) { | |
| 30 case ADD: | |
| 31 result = leftDbl + rightDbl; | |
| 32 break; | |
| 33 | |
| 34 case SUBTRACT: | |
| 35 result = leftDbl - rightDbl; | |
| 36 break; | |
| 37 | |
| 38 case DIVIDE: | |
| 39 if (rightDbl == 0) { | |
| 40 #if defined(XP_WIN) | |
| 41 /* XXX MSVC miscompiles such that (NaN == 0) */ | |
| 42 if (mozilla::IsNaN(rightDbl)) | |
| 43 result = mozilla::UnspecifiedNaN<double>(); | |
| 44 else | |
| 45 #endif | |
| 46 if (leftDbl == 0 || mozilla::IsNaN(leftDbl)) | |
| 47 result = mozilla::UnspecifiedNaN<double>(); | |
| 48 else if (mozilla::IsNegative(leftDbl) != mozilla::IsNegative(rightDbl)) | |
| 49 result = mozilla::NegativeInfinity<double>(); | |
| 50 else | |
| 51 result = mozilla::PositiveInfinity<double>(); | |
| 52 } | |
| 53 else | |
| 54 result = leftDbl / rightDbl; | |
| 55 break; | |
| 56 | |
| 57 case MODULUS: | |
| 58 if (rightDbl == 0) { | |
| 59 result = mozilla::UnspecifiedNaN<double>(); | |
| 60 } | |
| 61 else { | |
| 62 #if defined(XP_WIN) | |
| 63 /* Workaround MS fmod bug where 42 % (1/0) => NaN, not 42. */ | |
| 64 if (!mozilla::IsInfinite(leftDbl) && mozilla::IsInfinite(rightDbl)) | |
| 65 result = leftDbl; | |
| 66 else | |
| 67 #endif | |
| 68 result = fmod(leftDbl, rightDbl); | |
| 69 } | |
| 70 break; | |
| 71 | |
| 72 case MULTIPLY: | |
| 73 result = leftDbl * rightDbl; | |
| 74 break; | |
| 75 } | |
| 76 | |
| 77 return aContext->recycler()->getNumberResult(result, aResult); | |
| 78 } //-- evaluate | |
| 79 | |
| 80 TX_IMPL_EXPR_STUBS_2(txNumberExpr, NUMBER_RESULT, mLeftExpr, mRightExpr) | |
| 81 | |
| 82 bool | |
| 83 txNumberExpr::isSensitiveTo(ContextSensitivity aContext) | |
| 84 { | |
| 85 return mLeftExpr->isSensitiveTo(aContext) || | |
| 86 mRightExpr->isSensitiveTo(aContext); | |
| 87 } | |
| 88 | |
| 89 #ifdef TX_TO_STRING | |
| 90 void | |
| 91 txNumberExpr::toString(nsAString& str) | |
| 92 { | |
| 93 mLeftExpr->toString(str); | |
| 94 | |
| 95 switch (mOp) { | |
| 96 case ADD: | |
| 97 str.AppendLiteral(" + "); | |
| 98 break; | |
| 99 case SUBTRACT: | |
| 100 str.AppendLiteral(" - "); | |
| 101 break; | |
| 102 case DIVIDE: | |
| 103 str.AppendLiteral(" div "); | |
| 104 break; | |
| 105 case MODULUS: | |
| 106 str.AppendLiteral(" mod "); | |
| 107 break; | |
| 108 case MULTIPLY: | |
| 109 str.AppendLiteral(" * "); | |
| 110 break; | |
| 111 } | |
| 112 | |
| 113 mRightExpr->toString(str); | |
| 114 | |
| 115 } | |
| 116 #endif |
