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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Linus Nielsen Feltzing
*
* 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 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdio.h> /* get NULL */
#include "config.h"
#include "kernel.h"
#include "rtc.h"
#include "timefuncs.h"
#include "debug.h"
static struct tm tm;
#if !CONFIG_RTC
static void fill_default_tm(struct tm *tm)
{
tm->tm_sec = 0;
tm->tm_min = 0;
tm->tm_hour = 0;
tm->tm_mday = 1;
tm->tm_mon = 0;
tm->tm_year = 70;
tm->tm_wday = 1;
tm->tm_yday = 0; /* Not implemented for now */
tm->tm_isdst = -1; /* Not implemented for now */
}
#endif /* !CONFIG_RTC */
bool valid_time(const struct tm *tm)
{
if (tm->tm_hour < 0 || tm->tm_hour > 23 ||
tm->tm_sec < 0 || tm->tm_sec > 59 ||
tm->tm_min < 0 || tm->tm_min > 59 ||
tm->tm_year < 100 || tm->tm_year > 199 ||
tm->tm_mon < 0 || tm->tm_mon > 11 ||
tm->tm_wday < 0 || tm->tm_wday > 6 ||
tm->tm_mday < 1 || tm->tm_mday > 31)
return false;
else
return true;
}
struct tm *get_time(void)
{
#if CONFIG_RTC
static long timeout = 0;
/* Don't read the RTC more than once per second */
if (TIME_AFTER(current_tick, timeout))
{
/* Once per second, 1/10th of a second off */
timeout = HZ * (current_tick / HZ + 1) + HZ / 5;
rtc_read_datetime(&tm);
tm.tm_yday = 0; /* Not implemented for now */
tm.tm_isdst = -1; /* Not implemented for now */
}
#else /* No RTC */
fill_default_tm(&tm);
#endif /* RTC */
return &tm;
}
int set_time(const struct tm *tm)
{
#if CONFIG_RTC
int rc;
if (valid_time(tm))
{
rc = rtc_write_datetime(tm);
if (rc < 0)
return -1;
else
return 0;
}
else
{
return -2;
}
#else /* No RTC */
(void)tm;
return 0;
#endif /* RTC */
}
#if CONFIG_RTC
/* mktime() code taken from lynx-2.8.5 source, written
by Philippe De Muyter <phdm@macqel.be> */
time_t mktime(struct tm *t)
{
short month, year;
time_t result;
static int m_to_d[12] =
{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};
month = t->tm_mon;
year = t->tm_year + month / 12 + 1900;
month %= 12;
if (month < 0)
{
year -= 1;
month += 12;
}
result = (year - 1970) * 365 + (year - 1969) / 4 + m_to_d[month];
result = (year - 1970) * 365 + m_to_d[month];
if (month <= 1)
year -= 1;
result += (year - 1968) / 4;
result -= (year - 1900) / 100;
result += (year - 1600) / 400;
result += t->tm_mday;
result -= 1;
result *= 24;
result += t->tm_hour;
result *= 60;
result += t->tm_min;
result *= 60;
result += t->tm_sec;
return(result);
}
#endif
void set_day_of_week(struct tm *tm)
{
int y=tm->tm_year+1900;
int d=tm->tm_mday;
int m=tm->tm_mon;
static const char mo[] = { 0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4 };
if(m == 0 || m == 1) y--;
tm->tm_wday = (d + mo[m] + y + y/4 - y/100 + y/400) % 7;
}
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