time_macros.h File Reference

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Macros
#define	PST_OFFSET   (8UL)
#define	SEC_PER_MIN   (60UL)
#define	SEC_PER_HOUR   (3600UL)
#define	SEC_PER_DAY   (86400UL)
#define	SEC_PER_YEAR   (SEC_PER_DAY*365)
#define	CONV_STR2DEC_1(str, i)   (str[i]>'0'?str[i]-'0':0)
#define	CONV_STR2DEC_2(str, i)   (CONV_STR2DEC_1(str, i)*10 + str[i+1]-'0')
#define	CONV_STR2DEC_3(str, i)   (CONV_STR2DEC_2(str, i)*10 + str[i+2]-'0')
#define	CONV_STR2DEC_4(str, i)   (CONV_STR2DEC_3(str, i)*10 + str[i+3]-'0')
#define	GET_MONTH(str, i)
#define	__TIME_SECONDS__   CONV_STR2DEC_2(__TIME__, 6)
#define	__TIME_MINUTES__   CONV_STR2DEC_2(__TIME__, 3)
#define	__TIME_HOURS__   CONV_STR2DEC_2(__TIME__, 0)
#define	__TIME_DAYS__   CONV_STR2DEC_2(__DATE__, 4)
#define	__TIME_MONTH__   GET_MONTH(__DATE__, 0)
#define	__TIME_YEARS__   CONV_STR2DEC_4(__DATE__, 7)
#define	_UNIX_TIMESTAMP_FDAY(year)
#define	_UNIX_TIMESTAMP_YDAY(year, month, day)
#define	_UNIX_TIMESTAMP(year, month, day, hour, minute, second)
#define	UNIX_TIMESTAMP   _UNIX_TIMESTAMP(__TIME_YEARS__, __TIME_MONTH__, __TIME_DAYS__, __TIME_HOURS__, __TIME_MINUTES__, __TIME_SECONDS__)
#define	UNIX_TIMESTAMP_UTC   (UNIX_TIMESTAMP + (PST_OFFSET*SEC_PER_HOUR))

Macro Definition Documentation

__TIME_DAYS__

#define __TIME_DAYS__   CONV_STR2DEC_2(__DATE__, 4)

__TIME_HOURS__

#define __TIME_HOURS__   CONV_STR2DEC_2(__TIME__, 0)

__TIME_MINUTES__

#define __TIME_MINUTES__   CONV_STR2DEC_2(__TIME__, 3)

__TIME_MONTH__

#define __TIME_MONTH__   GET_MONTH(__DATE__, 0)

__TIME_SECONDS__

#define __TIME_SECONDS__   CONV_STR2DEC_2(__TIME__, 6)

__TIME_YEARS__

#define __TIME_YEARS__   CONV_STR2DEC_4(__DATE__, 7)

_UNIX_TIMESTAMP

#define _UNIX_TIMESTAMP	(		year,
			month,
			day,
			hour,
			minute,
			second
	)

Value:

( /* time */ second \
                + minute * SEC_PER_MIN \
                + hour * SEC_PER_HOUR \
    + /* year day (month + day) */ (_UNIX_TIMESTAMP_YDAY(year, month, day) - 1) * SEC_PER_DAY \
    + /* year */ (year - 1970UL) * SEC_PER_YEAR \
                + ((year - 1969UL) / 4UL) * SEC_PER_DAY \
                - ((year - 1901UL) / 100UL) * SEC_PER_DAY \
                + ((year - 1601UL) / 400UL) * SEC_PER_DAY \
    )

_UNIX_TIMESTAMP_FDAY

#define _UNIX_TIMESTAMP_FDAY

(

year

)

Value:

(((year) % 400) == 0UL ? 29UL : \
        (((year) % 100) == 0UL ? 28UL : \
            (((year) % 4) == 0UL ? 29UL : \
                28UL)))

_UNIX_TIMESTAMP_YDAY

#define _UNIX_TIMESTAMP_YDAY	(		year,
			month,
			day
	)

Value:

( \
        /* January */    day \
        /* February */ + (month >=  2 ? 31UL : 0UL) \
        /* March */    + (month >=  3 ? _UNIX_TIMESTAMP_FDAY(year) : 0UL) \
        /* April */    + (month >=  4 ? 31UL : 0UL) \
        /* May */      + (month >=  5 ? 30UL : 0UL) \
        /* June */     + (month >=  6 ? 31UL : 0UL) \
        /* July */     + (month >=  7 ? 30UL : 0UL) \
        /* August */   + (month >=  8 ? 31UL : 0UL) \
        /* September */+ (month >=  9 ? 31UL : 0UL) \
        /* October */  + (month >= 10 ? 30UL : 0UL) \
        /* November */ + (month >= 11 ? 31UL : 0UL) \
        /* December */ + (month >= 12 ? 30UL : 0UL) \
    )

CONV_STR2DEC_1

#define CONV_STR2DEC_1	(		str,
			i
	)		(str[i]>'0'?str[i]-'0':0)

CONV_STR2DEC_2

#define CONV_STR2DEC_2	(		str,
			i
	)		(CONV_STR2DEC_1(str, i)*10 + str[i+1]-'0')

CONV_STR2DEC_3

#define CONV_STR2DEC_3	(		str,
			i
	)		(CONV_STR2DEC_2(str, i)*10 + str[i+2]-'0')

CONV_STR2DEC_4

#define CONV_STR2DEC_4	(		str,
			i
	)		(CONV_STR2DEC_3(str, i)*10 + str[i+3]-'0')

GET_MONTH

#define GET_MONTH	(		str,
			i
	)

Value:

(str[i]=='J' && str[i+1]=='a' && str[i+2]=='n' ? 1 :     \
                                str[i]=='F' && str[i+1]=='e' && str[i+2]=='b' ? 2 :     \
                                str[i]=='M' && str[i+1]=='a' && str[i+2]=='r' ? 3 :     \
                                str[i]=='A' && str[i+1]=='p' && str[i+2]=='r' ? 4 :     \
                                str[i]=='M' && str[i+1]=='a' && str[i+2]=='y' ? 5 :     \
                                str[i]=='J' && str[i+1]=='u' && str[i+2]=='n' ? 6 :     \
                                str[i]=='J' && str[i+1]=='u' && str[i+2]=='l' ? 7 :     \
                                str[i]=='A' && str[i+1]=='u' && str[i+2]=='g' ? 8 :     \
                                str[i]=='S' && str[i+1]=='e' && str[i+2]=='p' ? 9 :     \
                                str[i]=='O' && str[i+1]=='c' && str[i+2]=='t' ? 10 :    \
                                str[i]=='N' && str[i+1]=='o' && str[i+2]=='v' ? 11 :    \
                                str[i]=='D' && str[i+1]=='e' && str[i+2]=='c' ? 12 : 0)

PST_OFFSET

#define PST_OFFSET   (8UL)

SEC_PER_DAY

#define SEC_PER_DAY   (86400UL)

SEC_PER_HOUR

#define SEC_PER_HOUR   (3600UL)

SEC_PER_MIN

#define SEC_PER_MIN   (60UL)

SEC_PER_YEAR

#define SEC_PER_YEAR   (SEC_PER_DAY*365)

UNIX_TIMESTAMP

#define UNIX_TIMESTAMP   _UNIX_TIMESTAMP(__TIME_YEARS__, __TIME_MONTH__, __TIME_DAYS__, __TIME_HOURS__, __TIME_MINUTES__, __TIME_SECONDS__)

UNIX_TIMESTAMP_UTC

#define UNIX_TIMESTAMP_UTC   (UNIX_TIMESTAMP + (PST_OFFSET*SEC_PER_HOUR))