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- 1.4
- date 88.11.17.20.52.03; author adam; state Exp;
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- @checked in with -k by kupfer at 92.05.18.17.32.34.
- @
- text
- @/*-
- * LstCur.c --
- * Return the current node in the list.
- * The sequential functions access the list in a slightly different way.
- * CurPtr points to their idea of the current node in the list and they
- * access the list based on it. Because the list is circular, Lst_Next
- * and Lst_Prev will go around the list forever. Lst_IsAtEnd must be
- * used to determine when to stop.
- *
- * 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: lstCur.c,v 1.4 88/11/17 20:52:03 adam Exp $ SPRITE (Berkeley)";
- #endif lint
-
- #include "lstInt.h"
-
- /*-
- *-----------------------------------------------------------------------
- * Lst_Cur --
- * Return the current node if the list is open for sequential
- * access.
- *
- * Results:
- * The current node or NILLNODE if the list isn't open..
- *
- * Side Effects:
- * None.
- *
- *-----------------------------------------------------------------------
- */
- LstNode
- Lst_Cur (l)
- Lst l;
- {
- register List list = (List)l;
-
- if ((LstValid(l) == FALSE) ||
- (list->isOpen == FALSE)) {
- return (NILLNODE);
- } else {
- return ((LstNode)list->curPtr);
- }
- }
-
- @
-