current.c

circuit calculation program

#include <stdio.h>
#include <stdlib.h>
#include "component.h"
#include "graph.h"
#include "eq.h"


int current_eq (int node_id)
{
	int i;

	assert (!CHECK_NODEFLAG ((node_id),SOURCE));	
	EQ_start();

	for (i = 0; i < NODE_PINS (node_id); i ++ ) {
		EQ_item_t *p;
		VA_value_t constant;
		int pin_gid;
		
		p = EQ_item_alloc();
		if (!p) {
			error (__FILE__,__LINE__,"Memory insufficient");
			return ENO_MEM;
		}
		
		pin_gid = NODE_PIN (node_id) [i];
		assert (COMPCLASS (pin_gid)->I_eq);
		constant = COMPCLASS (pin_gid)->I_eq (
			COMP (pin_gid), pin_gid, p );
		
		EQ_add (constant, p);
	}
	EQ_end();
	return 0;
}