/*
 * Accord Software, Inc.
 *
 * Tutorial 06
 *
 * Add numbers in a circular list
 */

#include "circular.h"

/*
 * build a singly linked circular list
 */

static struct list1 c1[] = {
        {1, &c1[1]},    /* 0 */
        {2, &c1[2]},    /* 1 */
        {3, &c1[3]},    /* 2 */
        {4, &c1[4]},    /* 3 */
        {5, &c1[5]},    /* 4 */
        {6, &c1[6]},    /* 5 */
        {7, &c1[7]},    /* 6 */
        {8, &c1[0]},    /* 7 */
};

/*
 * build a doubly linked circular list
 */

static struct list2 c2[] = {
        {1, &c2[1], &c2[7]},    /* 0 */
        {2, &c2[2], &c2[0]},    /* 1 */
        {3, &c2[3], &c2[1]},    /* 2 */
        {4, &c2[4], &c2[2]},    /* 3 */
        {5, &c2[5], &c2[3]},    /* 4 */
        {6, &c2[6], &c2[4]},    /* 5 */
        {7, &c2[7], &c2[5]},    /* 6 */
        {8, &c2[0], &c2[6]},    /* 7 */
};

main(argc, argv)
	int argc;
	char *argv[];
{
	char *progname = argv[0];
	struct list1 *list1 = c1;
	struct list2 *list2 = c2;
	int j;
	int loop = 2;

	/*
	 * call ipf to add loop twice
	 */

	j = addcirc1(loop, list1);
	printf("%s loops = %d, sum = %d\n", 
		progname, loop, j);

	j = addcirc2(loop, FORWARD, list2);
	printf("%s loops = %d, forward sum = %d\n", 
		progname, loop, j);

	j = addcirc2(loop, BACKWARD, list2);
	printf("%s loops = %d, backward sum = %d\n", 
		progname, loop, j);

	exit(0);
}