/*

 * m_estimator.c	Parse/print estimator module options.

 *

 *		This program is free software; you can u32istribute it and/or

 *		modify it under the terms of the GNU General Public License

 *		as published by the Free Software Foundation; either version

 *		2 of the License, or (at your option) any later version.

 *

 * Authors:	Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>

 *

 */

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <fcntl.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <arpa/inet.h>

#include <string.h>

#include "utils.h"

#include "tc_util.h"

#include "tc_common.h"

static void est_help(void);

static void est_help(void)

{

	fprintf(stderr,

		"Usage: ... estimator INTERVAL TIME-CONST\n"

		"  INTERVAL is interval between measurements\n"

		"  TIME-CONST is averaging time constant\n"

		"Example: ... est 1sec 8sec\n");

}

int parse_estimator(int *p_argc, char ***p_argv, struct tc_estimator *est)

{

	int argc = *p_argc;

	char **argv = *p_argv;

	unsigned int A, time_const;

	NEXT_ARG();

	if (est->ewma_log)

		duparg("estimator", *argv);

	if (matches(*argv, "help") == 0)

		est_help();

	if (get_time(&A, *argv))

		invarg("estimator", "invalid estimator interval");

	NEXT_ARG();

	if (matches(*argv, "help") == 0)

		est_help();

	if (get_time(&time_const, *argv))

		invarg("estimator", "invalid estimator time constant");

	if (tc_setup_estimator(A, time_const, est) < 0) {

		fprintf(stderr, "Error: estimator parameters are out of range.\n");

		return -1;

	}

	if (show_raw)

		fprintf(stderr, "[estimator i=%u e=%u]\n", est->interval, est->ewma_log);

	*p_argc = argc;

	*p_argv = argv;

	return 0;

}