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- /*-
- * LstFindFrom.c --
- * Find a node on a list from a given starting point. Used by Lst_Find.
- *
- * 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: lstFindFrom.c,v 1.6 88/11/17 20:52:37 adam Exp $ SPRITE (Berkeley)";
- #endif lint
-
- #include "lstInt.h"
-
- /*-
- *-----------------------------------------------------------------------
- * Lst_FindFrom --
- * Search for a node starting and ending with the given one on the
- * given list using the passed datum and comparison function to
- * determine when it has been found.
- *
- * Results:
- * The found node or NILLNODE
- *
- * Side Effects:
- * None.
- *
- *-----------------------------------------------------------------------
- */
- LstNode
- Lst_FindFrom (l, ln, d, cProc)
- Lst l;
- register LstNode ln;
- register ClientData d;
- register int (*cProc)();
- {
- register ListNode tln;
- Boolean found = FALSE;
-
- if (!LstValid (l) || LstIsEmpty (l) || !LstNodeValid (ln, l)) {
- return (NILLNODE);
- }
-
- tln = (ListNode)ln;
-
- do {
- if ((*cProc) (tln->datum, d) == 0) {
- found = TRUE;
- break;
- } else {
- tln = tln->nextPtr;
- }
- } while (tln != (ListNode)ln && tln != NilListNode);
-
- if (found) {
- return ((LstNode)tln);
- } else {
- return (NILLNODE);
- }
- }
-
-