85 	 *	prepend this parent to the parents of this child  in addarc()
87     arcp -> arc_parentlist = childp -> parents;  in addarc()
88     childp -> parents = arcp;  in addarc()
224 	 *	propagate children times up to parents.  in doarcs()
402 	cyclenlp -> parents = 0;	/* list of caller arcs */  in cyclelink()
423 	    for ( arcp=memberp->parents ; arcp ; arcp=arcp->arc_parentlist ) {  in cyclelink()
458 	 *	some of their parents  in cycleanalyze()
466 	    for ( arcp = nlp -> parents; arcp; arcp = arcp -> arc_parentlist ) {  in cycleanalyze()
779      *		printflag as the union of parents' printflags
780      *		propfraction as the sum of fractional parents' propfractions
825 		 *	this function has printing parents:  in doflags()
836 		 *	no parents to pass time to.  in doflags()
847 		 *	it has parents to pass time to,  in doflags()
873      *	(or outside parents of this cycle)
876      *	similarly, deal with propagation fractions from parents.
889 	     *	just a regular child, check its parents  in inheritflags()
893 	for (arcp = childp -> parents ; arcp ; arcp = arcp -> arc_parentlist) {  in inheritflags()
915 	     *	its a member of a cycle, look at all parents from  in inheritflags()
921 	    for (arcp = memp->parents ; arcp ; arcp = arcp->arc_parentlist) {  in inheritflags()