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include "daytime.m";
daytime:= load Daytime Daytime->PATH;
Tm: adt
{
sec: int;
min: int;
hour: int;
mday: int;
mon: int;
year: int;
wday: int;
yday: int;
zone: string;
tzoff: int;
};
text: fn(tm: ref Tm) : string;
filet: fn(now, file: int): string;
gmt: fn(tim: int) : ref Tm;
local: fn(tim: int) : ref Tm;
now: fn() : int;
time: fn() : string;
tm2epoch: fn(tm: ref Tm) : int;
text: fn(tm: ref Tm): string;The text function converts a Tm adt referenced by tm from local or GMT time to a string in the format:
Tue Aug 16 17:03:52 CDT 1977
filet: fn(now, file: int): string;The filet function converts the file time file from seconds since the epoch to local time as a string in the format: Aug 16 17:03 if the file is less than 6 months old or Aug 16 1977 if the file is older than 6 months.
gmt: fn(tim: int): ref Tm;The gmt function converts seconds since the epoch contained in tim to a Tm adt in Greenwich Mean Time (GMT).
local: fn(tim: int): ref Tm;The local function converts seconds since the epoch contained in tim to a Tm adt in local time.
now: fn(): int;
## returns seconds since epoch; 0 if error.The now function returns the time in seconds since the epoch. This functions works by reading file
/dev/time to get the time in microseconds since the epoch.
time: fn(): string;The time function returns the local time as a string in the format:
Tue Aug 16 17:03:52 CDT 1977
tm2epoch: fn(tm: ref Tm): int;
## returns seconds since epoch.The tm2epoch function converts a Tm adt referenced by tm from local time to seconds since the epoch.
'GMT' is used rather than 'UTC' as in other operating systems. There is no serious treatment of leap seconds; instead the epoch is implicitly shifted. Existing practice also dictate the following conventions:
| year=96 | means 1996 |
| mday=1 | means first day of the month |
| wday=0 | means Sunday |
| mon=0 | means January |