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- /*-
- * LstPred.c --
- * Return the predecessor of a given list node
- *
- * 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: lstPred.c,v 1.4 88/11/17 20:53:50 adam Exp $ SPRITE (Berkeley)";
- #endif lint
-
- #include "lstInt.h"
-
- /*-
- *-----------------------------------------------------------------------
- * Lst_Pred --
- * Return the predecessor of the given node.
- *
- * Results:
- * The node's predecessor, if any, or NILLNODE if it has none.
- *
- * Side Effects:
- * None.
- *
- *-----------------------------------------------------------------------
- */
- LstNode
- Lst_Pred (ln)
- LstNode ln;
- {
- if (ln == NILLNODE) {
- return (NILLNODE);
- } else {
- return ((LstNode)((ListNode) ln)->prevPtr);
- }
- }
-
-