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-rw-r--r--dom/xslt/xpath/txNumberExpr.cpp116
1 files changed, 116 insertions, 0 deletions
diff --git a/dom/xslt/xpath/txNumberExpr.cpp b/dom/xslt/xpath/txNumberExpr.cpp
new file mode 100644
index 000000000..1defe905b
--- /dev/null
+++ b/dom/xslt/xpath/txNumberExpr.cpp
@@ -0,0 +1,116 @@
+/* -*- 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 "mozilla/FloatingPoint.h"
+
+#include "txExpr.h"
+#include <math.h>
+#include "txIXPathContext.h"
+
+nsresult
+txNumberExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult)
+{
+ *aResult = nullptr;
+
+ RefPtr<txAExprResult> exprRes;
+ nsresult rv = mRightExpr->evaluate(aContext, getter_AddRefs(exprRes));
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ double rightDbl = exprRes->numberValue();
+
+ rv = mLeftExpr->evaluate(aContext, getter_AddRefs(exprRes));
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ double leftDbl = exprRes->numberValue();
+ double result = 0;
+
+ switch (mOp) {
+ case ADD:
+ result = leftDbl + rightDbl;
+ break;
+
+ case SUBTRACT:
+ result = leftDbl - rightDbl;
+ break;
+
+ case DIVIDE:
+ if (rightDbl == 0) {
+#if defined(XP_WIN)
+ /* XXX MSVC miscompiles such that (NaN == 0) */
+ if (mozilla::IsNaN(rightDbl))
+ result = mozilla::UnspecifiedNaN<double>();
+ else
+#endif
+ if (leftDbl == 0 || mozilla::IsNaN(leftDbl))
+ result = mozilla::UnspecifiedNaN<double>();
+ else if (mozilla::IsNegative(leftDbl) != mozilla::IsNegative(rightDbl))
+ result = mozilla::NegativeInfinity<double>();
+ else
+ result = mozilla::PositiveInfinity<double>();
+ }
+ else
+ result = leftDbl / rightDbl;
+ break;
+
+ case MODULUS:
+ if (rightDbl == 0) {
+ result = mozilla::UnspecifiedNaN<double>();
+ }
+ else {
+#if defined(XP_WIN)
+ /* Workaround MS fmod bug where 42 % (1/0) => NaN, not 42. */
+ if (!mozilla::IsInfinite(leftDbl) && mozilla::IsInfinite(rightDbl))
+ result = leftDbl;
+ else
+#endif
+ result = fmod(leftDbl, rightDbl);
+ }
+ break;
+
+ case MULTIPLY:
+ result = leftDbl * rightDbl;
+ break;
+ }
+
+ return aContext->recycler()->getNumberResult(result, aResult);
+} //-- evaluate
+
+TX_IMPL_EXPR_STUBS_2(txNumberExpr, NUMBER_RESULT, mLeftExpr, mRightExpr)
+
+bool
+txNumberExpr::isSensitiveTo(ContextSensitivity aContext)
+{
+ return mLeftExpr->isSensitiveTo(aContext) ||
+ mRightExpr->isSensitiveTo(aContext);
+}
+
+#ifdef TX_TO_STRING
+void
+txNumberExpr::toString(nsAString& str)
+{
+ mLeftExpr->toString(str);
+
+ switch (mOp) {
+ case ADD:
+ str.AppendLiteral(" + ");
+ break;
+ case SUBTRACT:
+ str.AppendLiteral(" - ");
+ break;
+ case DIVIDE:
+ str.AppendLiteral(" div ");
+ break;
+ case MODULUS:
+ str.AppendLiteral(" mod ");
+ break;
+ case MULTIPLY:
+ str.AppendLiteral(" * ");
+ break;
+ }
+
+ mRightExpr->toString(str);
+
+}
+#endif