1 files changed, 55 insertions, 0 deletions
diff --git a/dom/xslt/xpath/txUnaryExpr.cpp b/dom/xslt/xpath/txUnaryExpr.cpp
new file mode 100644
index 000000000..95682b5b2
--- /dev/null
+++ b/dom/xslt/xpath/txUnaryExpr.cpp
@@ -0,0 +1,55 @@
+/* -*- 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 "txExpr.h"
+#include "txIXPathContext.h"
+
+/*
+ * Evaluates this Expr based on the given context node and processor state
+ * @param context the context node for evaluation of this Expr
+ * @param ps the ContextState containing the stack information needed
+ * for evaluation.
+ * @return the result of the evaluation.
+ */
+nsresult
+UnaryExpr::evaluate(txIEvalContext* aContext, txAExprResult** aResult)
+{
+    *aResult = nullptr;
+
+    RefPtr<txAExprResult> exprRes;
+    nsresult rv = expr->evaluate(aContext, getter_AddRefs(exprRes));
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    double value = exprRes->numberValue();
+#ifdef HPUX
+    /*
+     * Negation of a zero doesn't produce a negative
+     * zero on HPUX. Perform the operation by multiplying with
+     * -1.
+     */
+    return aContext->recycler()->getNumberResult(-1 * value, aResult);
+#else
+    return aContext->recycler()->getNumberResult(-value, aResult);
+#endif
+}
+
+TX_IMPL_EXPR_STUBS_1(UnaryExpr, NODESET_RESULT, expr)
+
+bool
+UnaryExpr::isSensitiveTo(ContextSensitivity aContext)
+{
+    return expr->isSensitiveTo(aContext);
+}
+
+#ifdef TX_TO_STRING
+void
+UnaryExpr::toString(nsAString& str)
+{
+    if (!expr)
+        return;
+    str.Append(char16_t('-'));
+    expr->toString(str);
+}
+#endif