/** Time related functions.
 *
 * @file
 * @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
 * @copyright 2014-2020, Institute for Automation of Complex Power Systems, EONERC
 * @license GNU General Public License (version 3)
 *
 * VILLAScommon
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *********************************************************************************/

#pragma once

#include <cstdio>
#include <cstdint>

#include <ctime>

/** Compare two timestamps. Return zero if they are equal */
ssize_t time_cmp(const struct timespec *a, const struct timespec *b);

/** Get delta between two timespec structs */
struct timespec time_diff(const struct timespec *start, const struct timespec *end);

/** Get sum of two timespec structs */
struct timespec time_add(const struct timespec *start, const struct timespec *end);

/** Return current time as a struct timespec. */
struct timespec time_now();

/** Return the diffrence off two timestamps as double value in seconds. */
double time_delta(const struct timespec *start, const struct timespec *end);

/** Convert timespec to double value representing seconds */
double time_to_double(const struct timespec *ts);

/** Convert double containing seconds after 1970 to timespec. */
struct timespec time_from_double(double secs);