#include "defs.h"



/* routine to compute the 'connectedness' of chip c */

fio(c) 
	CHP c;
{
	INT v;
	REG j, k;
	PIN p;
	REG PIN n;

	v = 1000;
	for (p = c->pins; p < &c->pins[c->siz]; p++)
	{
		k = 1;
		for (n = CHAIN(p); n != p; n = CHAIN(n))
		{
			j = n->x & UNPLAC;
			if (j == k) goto mix;
			k = j - UNPLAC;
		}
		if (k & UNPLAC) v++;
		else if (k == 0) v--;
mix:	
		;
	}
	return(v);
}