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- /*-
- * LstDestroy.c --
- * Nuke a list and all its resources
- *
- * 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: lstDestroy.c,v 1.5 88/11/17 20:52:15 adam Exp $ SPRITE (Berkeley)";
- #endif lint
-
- #include "lstInt.h"
-
- /*-
- *-----------------------------------------------------------------------
- * Lst_Destroy --
- * Destroy a list and free all its resources. If the freeProc is
- * given, it is called with the datum from each node in turn before
- * the node is freed.
- *
- * Results:
- * None.
- *
- * Side Effects:
- * The given list is freed in its entirety.
- *
- *-----------------------------------------------------------------------
- */
- void
- Lst_Destroy (l, freeProc)
- Lst l;
- register void (*freeProc)();
- {
- register ListNode ln;
- register ListNode tln = NilListNode;
- register List list = (List)l;
-
- if (l == NILLST || ! l) {
- /*
- * Note the check for l == (Lst)0 to catch uninitialized static Lst's.
- * Gross, but useful.
- */
- return;
- }
-
- if (freeProc) {
- for (ln = list->firstPtr;
- ln != NilListNode && tln != list->firstPtr;
- ln = tln) {
- tln = ln->nextPtr;
- (*freeProc) (ln->datum);
- free ((Address)ln);
- }
- } else {
- for (ln = list->firstPtr;
- ln != NilListNode && tln != list->firstPtr;
- ln = tln) {
- tln = ln->nextPtr;
- free ((Address)ln);
- }
- }
-
- free ((Address)l);
- }
-