/*
* time.c - ESP8266-specific functions for SNTP
* Copyright (c) 2015 Peter Dobler. All rights reserved.
* This file is part of the esp8266 core for Arduino environment.
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library 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 Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <time.h>
#include "sntp.h"
#ifndef _TIMEVAL_DEFINED
#define _TIMEVAL_DEFINED
struct timeval {
time_t tv_sec;
suseconds_t tv_usec;
};
#endif
extern char* sntp_asctime(const struct tm *t);
extern struct tm* sntp_localtime(const time_t *clock);
// time gap in seconds from 01.01.1900 (NTP time) to 01.01.1970 (UNIX time)
#define DIFF1900TO1970 2208988800UL
static int s_daylightOffset_sec = 0;
static long s_timezone_sec = 0;
static time_t s_bootTime = 0;
// calculate offset used in gettimeofday
static void ensureBootTimeIsSet()
{
if (!s_bootTime)
{
time_t now = sntp_get_current_timestamp();
if (now)
{
s_bootTime = now - millis() / 1000;
}
}
}
static void setServer(int id, const char* name_or_ip)
{
if (name_or_ip)
{
//TODO: check whether server is given by name or IP
sntp_setservername(id, (char*) name_or_ip);
}
}
void configTime(int timezone, int daylightOffset_sec, const char* server1, const char* server2, const char* server3)
{
sntp_stop();
setServer(0, server1);
setServer(1, server2);
setServer(2, server3);
s_timezone_sec = timezone;
s_daylightOffset_sec = daylightOffset_sec;
sntp_set_timezone(timezone/3600);
sntp_init();
}
int clock_gettime(clockid_t unused, struct timespec *tp)
{
tp->tv_sec = millis() / 1000;
tp->tv_nsec = micros() * 1000;
return 0;
}
// seconds since 1970
time_t mktime(struct tm *t)
{
// system_mktime expects month in range 1..12
#define START_MONTH 1
return DIFF1900TO1970 + system_mktime(t->tm_year, t->tm_mon + START_MONTH, t->tm_mday, t->tm_hour, t->tm_min, t->tm_sec);
}
time_t time(time_t * t)
{
time_t seconds = sntp_get_current_timestamp();
if (t)
{
*t = seconds;
}
return seconds;
}
char* asctime(const struct tm *t)
{
return sntp_asctime(t);
}
struct tm* localtime(const time_t *clock)
{
return sntp_localtime(clock);
}
char* ctime(const time_t *t)
{
struct tm* p_tm = localtime(t);
char* result = asctime(p_tm);
return result;
}
int gettimeofday(struct timeval *tp, void *tzp)
{
if (tp)
{
ensureBootTimeIsSet();
tp->tv_sec = (s_bootTime + millis()) / 1000;
tp->tv_usec = micros() * 1000;
}
return 0;
}
