time.c File Reference

#include "precomp.h"

Include dependency graph for time.c:

Go to the source code of this file.

Macros
#define	LEAPS_THRU_END_OF(y)   ((y)/4 - (y)/100 + (y)/400)

Functions
BOOLEAN NTAPI	LlbIsLeapYear (IN ULONG Year)
ULONG NTAPI	LlbDayOfMonth (IN ULONG Month, IN ULONG Year)
VOID NTAPI	LlbConvertRtcTime (IN ULONG RtcTime, OUT TIMEINFO *TimeInfo)
TIMEINFO *NTAPI	LlbGetTime (VOID)

Variables
UCHAR	LlbDaysInMonth [] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
TIMEINFO	LlbTime

Macro Definition Documentation

LEAPS_THRU_END_OF

#define LEAPS_THRU_END_OF

(

y

)

((y)/4 - (y)/100 + (y)/400)

Definition at line 11 of file time.c.

Function Documentation

LlbConvertRtcTime()

VOID NTAPI LlbConvertRtcTime	(	IN ULONG	RtcTime,
		OUT TIMEINFO *	TimeInfo
	)

Definition at line 40 of file time.c.

{
    ULONG Month, Year, Days, DaysLeft;
 
    /* Count the days, keep the minutes */
    Days = RtcTime / 86400;
    RtcTime -= Days * 86400;
 
    /* Get the year, based on days since 1970 */
    Year = 1970 + Days / 365;
 
    /* Account for leap years which changed the number of days/year */
    Days -= (Year - 1970) * 365 + LEAPS_THRU_END_OF(Year - 1) - LEAPS_THRU_END_OF(1970 - 1);
    if (Days < 0)
    {
        /* We hit a leap year, so fixup the math */
        Year--;
        Days += 365 + LlbIsLeapYear(Year);
    }
 
    /* Count months */
    for (Month = 0; Month < 11; Month++)
    {
        /* How many days in this month? */
        DaysLeft = Days - LlbDayOfMonth(Month, Year);
        if (DaysLeft < 0) break;
 
        /* How many days left total? */
        Days = DaysLeft;
    }
 
    /* Write the structure */
    TimeInfo->Year = Year;
    TimeInfo->Day = Days + 1;
    TimeInfo->Month = Month + 1;
    TimeInfo->Hour = RtcTime / 3600;
    RtcTime -= TimeInfo->Hour * 3600;
    TimeInfo->Minute = RtcTime / 60;
    TimeInfo->Second = RtcTime - TimeInfo->Minute * 60;
}

Referenced by LlbGetTime().

LlbDayOfMonth()

ULONG NTAPI LlbDayOfMonth	(	IN ULONG	Month,
		IN ULONG	Year
	)

Definition at line 31 of file time.c.

{
    /* Check how many days a month has, accounting for leap yearS */
    return LlbDaysInMonth[Month] + (LlbIsLeapYear(Year) && Month == 1);
}

Referenced by LlbConvertRtcTime().

LlbGetTime()

TIMEINFO *NTAPI LlbGetTime

(

VOID

)

Definition at line 84 of file time.c.

{
    ULONG RtcTime;
 
    /* Read RTC time */
    RtcTime = LlbHwRtcRead();
#ifndef _ZOOM2_
    /* Convert it */
    LlbConvertRtcTime(RtcTime, &LlbTime);
#endif
    return &LlbTime;
}

Referenced by LlbFwGetTime().

LlbIsLeapYear()

BOOLEAN NTAPI LlbIsLeapYear

(

IN ULONG

Year

)

Definition at line 23 of file time.c.

{
    /* Every 4, 100, or 400 years */
    return (!(Year % 4) && (Year % 100)) || !(Year % 400);
}

Referenced by LlbConvertRtcTime(), and LlbDayOfMonth().

Variable Documentation

LlbDaysInMonth

UCHAR LlbDaysInMonth[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}

Definition at line 13 of file time.c.

Referenced by LlbDayOfMonth().

LlbTime

TIMEINFO LlbTime

Definition at line 16 of file time.c.

Referenced by LlbGetTime().