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- /*-
- * LstIsEmpty.c --
- * A single function to decide if a list is empty
- *
- * Copyright (c) 1988 by University of California Regents
- *
- * Permission to use, copy, modify, and distribute this
- * software and its documentation for any purpose and without
- * fee is hereby granted, provided that the above copyright
- * notice appears in all copies. Neither the University of California nor
- * Adam de Boor makes any representations about the suitability of this
- * software for any purpose. It is provided "as is" without
- * express or implied warranty.
- */
- #ifndef lint
- static char *rcsid =
- "$Id: lstIsEmpty.c,v 1.5 88/11/17 20:53:19 adam Exp $ SPRITE (Berkeley)";
- #endif lint
-
- #include "lstInt.h"
-
- /*-
- *-----------------------------------------------------------------------
- * Lst_IsEmpty --
- * Return TRUE if the given list is empty.
- *
- * Results:
- * TRUE if the list is empty, FALSE otherwise.
- *
- * Side Effects:
- * None.
- *
- * A list is considered empty if its firstPtr == NilListNode (or if
- * the list itself is NILLIST).
- *-----------------------------------------------------------------------
- */
- Boolean
- Lst_IsEmpty (l)
- Lst l;
- {
- return ( ! LstValid (l) || LstIsEmpty(l));
- }
-
-