time.h File Reference

Date and time. More...

#include <sys/time.h>
#include <ipxe/time.h>

Go to the source code of this file.

Data Structures
struct	tm
	Broken-down time. More...

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
	FILE_SECBOOT (PERMITTED)
static	__attribute__ ((always_inline)) time_t time(time_t *t)
	Get current time in seconds since the Epoch.
time_t	mktime (struct tm *tm)
	Calculate seconds since the Epoch.

Detailed Description

Date and time.

Definition in file time.h.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

FILE_SECBOOT()

FILE_SECBOOT

(

PERMITTED

)

__attribute__()

__attribute__ ( (always_inline) )

inlinestatic

Get current time in seconds since the Epoch.

Parameters

t	Time to fill in, or NULL

Return values

time	Current time

Definition at line 43 of file time.h.

                                                                          {
        time_t now;
 
        now = ( time_now() + time_offset );
        if ( t )
                *t = now;
        return now;
}

References time_now(), and time_offset.

mktime()

time_t mktime ( struct tm * tm )

extern

Calculate seconds since the Epoch.

Parameters

tm	Broken-down time

Return values

time	Seconds since the Epoch

Definition at line 119 of file time.c.

                                {
        int tm_year = tm->tm_year;
        int tm_mon = tm->tm_mon;
        int tm_mday = tm->tm_mday;
        int tm_hour = tm->tm_hour;
        int tm_min = tm->tm_min;
        int tm_sec = tm->tm_sec;
        int tm_yday;
        int tm_wday;
        int days_since_epoch;
        int seconds_since_day;
        time_t seconds;
 
        /* Normalize month for use as an array index */
        tm_year += ( tm_mon / 12 );
        tm_mon = ( tm_mon % 12 );
        if ( tm_mon < 0 ) {
                tm_year--;
                tm_mon += 12;
        }
        assert ( tm_mon >= 0 );
        assert ( tm_mon < 12 );
 
        /* Calculate day of year */
        tm_yday = ( ( tm_mday - 1 ) + days_to_month_start[tm_mon] );
        if ( ( tm_mon >= 2 ) && is_leap_year ( tm_year ) )
                tm_yday++;
        tm->tm_yday = tm_yday;
 
        /* Calculate day of week */
        tm_wday = day_of_week ( tm_year, tm_mon, tm_mday );
        tm->tm_wday = tm_wday;
 
        /* Calculate seconds since the Epoch */
        days_since_epoch = ( tm_yday + ( 365 * tm_year ) - 25567 +
                             leap_years_to_end ( tm_year - 1 ) );
        seconds_since_day =
                ( ( ( ( tm_hour * 60 ) + tm_min ) * 60 ) + tm_sec );
        seconds = ( ( ( ( time_t ) days_since_epoch ) * ( ( time_t ) 86400 ) )
                    + seconds_since_day );
 
        DBGC ( &weekdays, "TIME %04d-%02d-%02d %02d:%02d:%02d => %lld (%s, "
               "day %d)\n", ( tm->tm_year + 1900 ), ( tm->tm_mon + 1 ),
               tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec, seconds,
               weekdays[ tm->tm_wday ], tm->tm_yday );
 
        return seconds;
}

References assert, day_of_week(), days_to_month_start, DBGC, is_leap_year(), leap_years_to_end(), seconds, tm::tm_hour, tm::tm_mday, tm::tm_min, tm::tm_mon, tm::tm_sec, tm::tm_wday, tm::tm_yday, tm::tm_year, and weekdays.

Referenced by asn1_generalized_time(), efi_get_time(), and rtc_read_time().