#include <stdio.h>
#include <string.h>
#include <time.h>

#include <ieee1284.h>

static int get_bit (struct parport *p)
{
	int bit = ieee1284_read_status (p);
	return bit & 0x20 ? 1 : 0;
}

static void do_comm (struct parport *p)
{
	// First, sync up.  This could take several seconds..
	int last_bit = get_bit (p);
	printf ("Please wait...\n");
	while (get_bit (p) == last_bit) {
		struct timespec tv;
		tv.tv_sec = 0;
		tv.tv_nsec = 1000000;
		nanosleep (&tv, NULL);
	}
	printf ("Synchronised.  Let's go.\n");
}

static int timecomm (const char *port)
{
	struct parport_list pl;
	int listing = 0;
	int i;
	if (!strcmp (port, "-l")) {
		listing = 1;
		printf ("Available ports:\n");
	}
	ieee1284_find_ports (&pl, 0);
	for (i = 0; i < pl.portc; i++) {
		if (listing)
			printf ("%s\n", pl.portv[i]->name);
		else if (!strcmp (port, pl.portv[i]->name))
			break;
	}
	if (listing)
		return 0;
	if (i == pl.portc)
		return 1;
	ieee1284_claim (pl.portv[i]);
	do_comm (pl.portv[i]);
	ieee1284_release (pl.portv[i]);
	ieee1284_free_ports (&pl);
	return 0;
}

int main (int argc, char **argv)
{
	if (argc != 2) {
		printf ("Syntax: timecomm -l\n"
			"        timecomm <portname>\n");
		return 1;
	}
	return timecomm (argv[1]);
}