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diff --git a/libapol/src/infoflow-analysis-internal.h b/libapol/src/infoflow-analysis-internal.h
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+/**
+ * @file
+ *
+ * Protected routines for information flow analysis.
+ *
+ * @author Jeremy A. Mowery jmowery@tresys.com
+ * @author Jason Tang  jtang@tresys.com
+ *
+ * Copyright (C) 2003-2007 Tresys Technology, LLC
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef APOL_INFOFLOW_ANALYSIS_INTERNAL_H
+#define APOL_INFOFLOW_ANALYSIS_INTERNAL_H
+
+/**
+ * Do a deep copy (i.e., a clone) of an apol_infoflow_result_t object.
+ * The caller is responsible for calling apol_infoflow_result_free()
+ * upon the returned value.
+ *
+ * @param result Pointer to an infoflow result structure to destroy.
+ *
+ * @return A clone of the passed in result node, or NULL upon error.
+ */
+extern apol_infoflow_result_t *infoflow_result_create_from_infoflow_result(const apol_infoflow_result_t * result);
+
+/**
+ * Free all memory associated with an information flow analysis
+ * result, including the pointer itself.  This function does nothing
+ * if the result is already NULL.
+ *
+ * @param result Pointer to an infoflow result structure to destroy.
+ */
+extern void infoflow_result_free(void *result);
+
+#endif