1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/dom/xslt/xpath/txNumberExpr.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,116 @@
1.4 +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "mozilla/FloatingPoint.h"
1.10 +
1.11 +#include "txExpr.h"
1.12 +#include <math.h>
1.13 +#include "txIXPathContext.h"
1.14 +
1.15 +nsresult
1.16 +txNumberExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult)
1.17 +{
1.18 + *aResult = nullptr;
1.19 +
1.20 + nsRefPtr<txAExprResult> exprRes;
1.21 + nsresult rv = mRightExpr->evaluate(aContext, getter_AddRefs(exprRes));
1.22 + NS_ENSURE_SUCCESS(rv, rv);
1.23 +
1.24 + double rightDbl = exprRes->numberValue();
1.25 +
1.26 + rv = mLeftExpr->evaluate(aContext, getter_AddRefs(exprRes));
1.27 + NS_ENSURE_SUCCESS(rv, rv);
1.28 +
1.29 + double leftDbl = exprRes->numberValue();
1.30 + double result = 0;
1.31 +
1.32 + switch (mOp) {
1.33 + case ADD:
1.34 + result = leftDbl + rightDbl;
1.35 + break;
1.36 +
1.37 + case SUBTRACT:
1.38 + result = leftDbl - rightDbl;
1.39 + break;
1.40 +
1.41 + case DIVIDE:
1.42 + if (rightDbl == 0) {
1.43 +#if defined(XP_WIN)
1.44 + /* XXX MSVC miscompiles such that (NaN == 0) */
1.45 + if (mozilla::IsNaN(rightDbl))
1.46 + result = mozilla::UnspecifiedNaN<double>();
1.47 + else
1.48 +#endif
1.49 + if (leftDbl == 0 || mozilla::IsNaN(leftDbl))
1.50 + result = mozilla::UnspecifiedNaN<double>();
1.51 + else if (mozilla::IsNegative(leftDbl) != mozilla::IsNegative(rightDbl))
1.52 + result = mozilla::NegativeInfinity<double>();
1.53 + else
1.54 + result = mozilla::PositiveInfinity<double>();
1.55 + }
1.56 + else
1.57 + result = leftDbl / rightDbl;
1.58 + break;
1.59 +
1.60 + case MODULUS:
1.61 + if (rightDbl == 0) {
1.62 + result = mozilla::UnspecifiedNaN<double>();
1.63 + }
1.64 + else {
1.65 +#if defined(XP_WIN)
1.66 + /* Workaround MS fmod bug where 42 % (1/0) => NaN, not 42. */
1.67 + if (!mozilla::IsInfinite(leftDbl) && mozilla::IsInfinite(rightDbl))
1.68 + result = leftDbl;
1.69 + else
1.70 +#endif
1.71 + result = fmod(leftDbl, rightDbl);
1.72 + }
1.73 + break;
1.74 +
1.75 + case MULTIPLY:
1.76 + result = leftDbl * rightDbl;
1.77 + break;
1.78 + }
1.79 +
1.80 + return aContext->recycler()->getNumberResult(result, aResult);
1.81 +} //-- evaluate
1.82 +
1.83 +TX_IMPL_EXPR_STUBS_2(txNumberExpr, NUMBER_RESULT, mLeftExpr, mRightExpr)
1.84 +
1.85 +bool
1.86 +txNumberExpr::isSensitiveTo(ContextSensitivity aContext)
1.87 +{
1.88 + return mLeftExpr->isSensitiveTo(aContext) ||
1.89 + mRightExpr->isSensitiveTo(aContext);
1.90 +}
1.91 +
1.92 +#ifdef TX_TO_STRING
1.93 +void
1.94 +txNumberExpr::toString(nsAString& str)
1.95 +{
1.96 + mLeftExpr->toString(str);
1.97 +
1.98 + switch (mOp) {
1.99 + case ADD:
1.100 + str.AppendLiteral(" + ");
1.101 + break;
1.102 + case SUBTRACT:
1.103 + str.AppendLiteral(" - ");
1.104 + break;
1.105 + case DIVIDE:
1.106 + str.AppendLiteral(" div ");
1.107 + break;
1.108 + case MODULUS:
1.109 + str.AppendLiteral(" mod ");
1.110 + break;
1.111 + case MULTIPLY:
1.112 + str.AppendLiteral(" * ");
1.113 + break;
1.114 + }
1.115 +
1.116 + mRightExpr->toString(str);
1.117 +
1.118 +}
1.119 +#endif
