home *** CD-ROM | disk | FTP | other *** search
- head 1.2;
- branch ;
- access ;
- symbols ;
- locks ; strict;
- comment @ * @;
-
-
- 1.2
- date 88.11.17.20.52.54; author adam; state Exp;
- branches ;
- next ;
-
-
- desc
- @@
-
-
-
- 1.2
- log
- @checked in with -k by kupfer at 92.05.18.17.32.39.
- @
- text
- @/*-
- * lstIndex.c --
- * Function to return the index of a datum in a Lst.
- *
- * Copyright (c) 1988 by the Regents of the University of California
- *
- * 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. 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: lstIndex.c,v 1.2 88/11/17 20:52:54 adam Exp $ SPRITE (Berkeley)";
- #endif lint
-
- #include "lstInt.h"
-
- /*-
- *-----------------------------------------------------------------------
- * Lst_Index --
- * Return the index of a datum in a Lst. Indices start at 0.
- *
- * Results:
- * Returns -1 if the datum isn't in the Lst, or the index of
- * the datum if it is.
- *
- * Side Effects:
- * None.
- *
- *-----------------------------------------------------------------------
- */
- int
- Lst_Index(l, d)
- Lst l;
- ClientData d;
- {
- List list = (List)l;
- register ListNode lNode;
- register int index;
-
- lNode = list->firstPtr;
-
- if (lNode == NilListNode) {
- return(-1);
- }
-
- index = 0;
-
- do {
- if (lNode->datum == d) {
- return(index);
- } else {
- lNode = lNode->nextPtr;
- index += 1;
- }
- } while (lNode != NilListNode && lNode != list->firstPtr);
- return(-1);
- }
- @
-