46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
/*-
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* lstLength.c --
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* Find the length of a lst
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*
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* Copyright (c) 1988 by the Regents of the University of California
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* Copyright (c) 1988 by Adam de Boor
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*
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* Permission to use, copy, modify, and distribute this
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* software and its documentation for any purpose and without
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* fee is hereby granted, provided that the above copyright
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* notice appears in all copies. The University of California nor
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* Adam de Boor makes any representations about the suitability of this
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* software for any purpose. It is provided "as is" without
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* express or implied warranty.
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*
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*
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*/
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#if !defined(lint) && defined(keep_rcsid)
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static char *rcsid =
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"Id: lstLength.c,v 1.2 88/11/17 20:53:27 adam Exp $ SPRITE (Berkeley)";
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#endif lint
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#include "lstInt.h"
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int
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Lst_Length(l)
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Lst l; /* List whose length is desired */
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{
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register ListNode node;
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register List list = (List)l;
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register int len;
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if (!LstValid(l)) {
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return -1;
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}
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for (len = 0, node = list->firstPtr;
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node != NilListNode;
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len++, node = node->nextPtr) {
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if (node == list->firstPtr && len != 0) {
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break;
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}
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}
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return len;
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}
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