Messages in this thread | | | From | Kumar Gala <> | Subject | Re: [PATCH 01/18] RTC Subsystem, library functions | Date | Mon, 20 Mar 2006 13:18:32 -0600 |
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On Mar 18, 2006, at 11:19 AM, Alessandro Zummo wrote:
> RTC and date/time related functions. > > Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> > --- > drivers/Kconfig | 2 > drivers/Makefile | 1 > drivers/rtc/Kconfig | 6 ++ > drivers/rtc/Makefile | 5 ++ > drivers/rtc/rtc-lib.c | 101 ++++++++++++++++++++++++++++++++++++++ > ++++++++++++ > include/linux/rtc.h | 5 ++ > 6 files changed, 120 insertions(+) > > --- /dev/null 1970-01-01 00:00:00.000000000 +0000 > +++ linux-rtc/drivers/rtc/rtc-lib.c 2006-03-13 03:26:29.000000000 > +0100 > @@ -0,0 +1,101 @@ > +/* > + * rtc and date/time utility functions > + * > + * Copyright (C) 2005-06 Tower Technologies > + * Author: Alessandro Zummo <a.zummo@towertech.it> > + * > + * based on arch/arm/common/rtctime.c and other bits > + * > + * This program is free software; you can redistribute it and/or > modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > +*/ > + > +#include <linux/module.h> > +#include <linux/rtc.h> > + > +static const unsigned char rtc_days_in_month[] = { > + 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 > +}; > + > +#define LEAPS_THRU_END_OF(y) ((y)/4 - (y)/100 + (y)/400) > +#define LEAP_YEAR(year) ((!(year % 4) && (year % 100)) || !(year % > 400)) > + > +int rtc_month_days(unsigned int month, unsigned int year) > +{ > + return rtc_days_in_month[month] + (LEAP_YEAR(year) && month == 1); > +} > +EXPORT_SYMBOL(rtc_month_days); > + > +/* > + * Convert seconds since 01-01-1970 00:00:00 to Gregorian date. > + */ > +void rtc_time_to_tm(unsigned long time, struct rtc_time *tm) > +{ > + register int days, month, year; > + > + days = time / 86400; > + time -= days * 86400; > + > + /* day of the week, 1970-01-01 was a Thursday */ > + tm->tm_wday = (days + 4) % 7; > + > + year = 1970 + days / 365; > + days -= (year - 1970) * 365 > + + LEAPS_THRU_END_OF(year - 1) > + - LEAPS_THRU_END_OF(1970 - 1); > + if (days < 0) { > + year -= 1; > + days += 365 + LEAP_YEAR(year); > + } > + tm->tm_year = year - 1900; > + tm->tm_yday = days + 1; > + > + for (month = 0; month < 11; month++) { > + int newdays; > + > + newdays = days - rtc_month_days(month, year); > + if (newdays < 0) > + break; > + days = newdays; > + } > + tm->tm_mon = month; > + tm->tm_mday = days + 1; > + > + tm->tm_hour = time / 3600; > + time -= tm->tm_hour * 3600; > + tm->tm_min = time / 60; > + tm->tm_sec = time - tm->tm_min * 60; > +} > +EXPORT_SYMBOL(rtc_time_to_tm); > + > +/* > + * Does the rtc_time represent a valid date/time? > + */ > +int rtc_valid_tm(struct rtc_time *tm) > +{ > + if (tm->tm_year < 70 > + || tm->tm_mon >= 12 > + || tm->tm_mday < 1 > + || tm->tm_mday > rtc_month_days(tm->tm_mon, tm->tm_year + 1900) > + || tm->tm_hour >= 24 > + || tm->tm_min >= 60 > + || tm->tm_sec >= 60) > + return -EINVAL; > + > + return 0; > +} > +EXPORT_SYMBOL(rtc_valid_tm); > + > +/* > + * Convert Gregorian date to seconds since 01-01-1970 00:00:00. > + */ > +int rtc_tm_to_time(struct rtc_time *tm, unsigned long *time) > +{ > + *time = mktime(tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, > + tm->tm_hour, tm->tm_min, tm->tm_sec); > + return 0; > +} > +EXPORT_SYMBOL(rtc_tm_to_time); > + > +MODULE_LICENSE("GPL")
you are missing a ';' for MODULE_LICENSE.
[snip]
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