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diff --git a/src/lib/libast/vec/vecfree.c b/src/lib/libast/vec/vecfree.c
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+/***********************************************************************
+* *
+* This software is part of the ast package *
+* Copyright (c) 1985-2011 AT&T Intellectual Property *
+* and is licensed under the *
+* Eclipse Public License, Version 1.0 *
+* by AT&T Intellectual Property *
+* *
+* A copy of the License is available at *
+* http://www.eclipse.org/org/documents/epl-v10.html *
+* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
+* *
+* Information and Software Systems Research *
+* AT&T Research *
+* Florham Park NJ *
+* *
+* Glenn Fowler <gsf@research.att.com> *
+* David Korn <dgk@research.att.com> *
+* Phong Vo <kpv@research.att.com> *
+* *
+***********************************************************************/
+#pragma prototyped
+/*
+ * Glenn Fowler
+ * AT&T Bell Laboratories
+ *
+ * file to string vector support
+ */
+
+#include <ast.h>
+#include <vecargs.h>
+
+/*
+ * free a string vector generated by vecload()
+ *
+ * retain!=0 frees the string pointers but retains the string data
+ * in this case the data is permanently allocated
+ */
+
+void
+vecfree(register char** vec, int retain)
+{
+ if (vec)
+ {
+ if (*(vec -= 2) && !retain) free(*vec);
+ free(vec);
+ }
+}