1 files changed, 42 insertions, 0 deletions
diff --git a/src/lib/eval/evaluate.cc b/src/lib/eval/evaluate.cc
new file mode 100644
index 0000000..f2cadce
--- /dev/null
+++ b/src/lib/eval/evaluate.cc
@@ -0,0 +1,42 @@
+// Copyright (C) 2015-2017 Internet Systems Consortium, Inc. ("ISC")
+//
+// 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 <config.h>
+
+#include <eval/evaluate.h>
+
+namespace isc {
+namespace dhcp {
+
+bool evaluateBool(const Expression& expr, Pkt& pkt) {
+    ValueStack values;
+    for (Expression::const_iterator it = expr.begin();
+         it != expr.end(); ++it) {
+        (*it)->evaluate(pkt, values);
+    }
+    if (values.size() != 1) {
+        isc_throw(EvalBadStack, "Incorrect stack order. Expected exactly "
+                  "1 value at the end of evaluation, got " << values.size());
+    }
+    return (Token::toBool(values.top()));
+}
+
+std::string
+evaluateString(const Expression& expr, Pkt& pkt) {
+    ValueStack values;
+    for (auto it = expr.begin(); it != expr.end(); ++it) {
+        (*it)->evaluate(pkt, values);
+    }
+    if (values.size() != 1) {
+        isc_throw(EvalBadStack, "Incorrect stack order. Expected exactly "
+                  "1 value at the end of evaluation, got " << values.size());
+    }
+    return (values.top());
+}
+
+
+}; // end of isc::dhcp namespace
+}; // end of isc namespace