blob: fa56634c5bf8c97df0fea6dcc692bac73015c4d0 [file] [log] [blame]
/* Copyright 2017 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* RTC cross-platform functions */
#ifndef __CROS_EC_RTC_H
#define __CROS_EC_RTC_H
#include "common.h"
#define SECS_PER_DAY (60 * 60 * 24)
#define SECS_PER_YEAR (365 * SECS_PER_DAY)
/* The seconds elapsed from 01-01-1970 to 01-01-2000 */
#define SECS_TILL_YEAR_2K (946684800)
#define IS_LEAP_YEAR(x) \
(((x) % 4 == 0) && (((x) % 100 != 0) || ((x) % 400 == 0)))
struct calendar_date {
/* The number of years since A.D. 2000, i.e. year = 17 for y2017 */
uint8_t year;
/* 1-based indexing, i.e. sane values range from 1 to 12 */
uint8_t month;
/* 1-based indexing, i.e. sane values range from 1 to 31 */
uint8_t day;
};
/**
* Convert calendar date to seconds elapsed since epoch time.
*
* @param time The calendar date (years, months, and days).
* @return the seconds elapsed since epoch time (01-01-1970 00:00:00).
*/
uint32_t date_to_sec(struct calendar_date time);
/**
* Convert seconds elapsed since epoch time to calendar date
*
* @param sec The seconds elapsed since epoch time (01-01-1970 00:00:00).
* @return the calendar date (years, months, and days).
*/
struct calendar_date sec_to_date(uint32_t sec);
#endif /* __CROS_EC_RTC_H */