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diff --git a/ctrl/libhicnctrl/src/util/token.h b/ctrl/libhicnctrl/src/util/token.h
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+/*
+ * Copyright (c) 2017-2019 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* Token concatenation */
+
+/*
+ * Concatenate preprocessor tokens A and B without expanding macro definitions
+ * (however, if invoked from a macro, macro arguments are expanded).
+ */
+#define PPCAT_NX(A, B) A ## B
+
+/*
+ * Concatenate preprocessor tokens A and B after macro-expanding them.
+ */
+#define PPCAT(A, B) PPCAT_NX(A, B)
+
+/* Token stringification */
+
+/*
+ * Turn A into a string literal without expanding macro definitions
+ * (however, if invoked from a macro, macro arguments are expanded).
+ */
+#define STRINGIZE_NX(A) #A
+
+/*
+ * Turn A into a string literal after macro-expanding it.
+ */
+#define STRINGIZE(A) STRINGIZE_NX(A)