Re^3: Subtracting and Comparing Two Dates

[ikegami]

I don't see anything in POSIX similar to Time::Local's timegm. To which POSIX function were you refering?

[BaldPenguin]

timegm() in Time::Local == gmtime() in POSIX

After looking it looks like Time::Local is a Pure Perl interface to the Perl localtime objects where POSIX is an XS interface to the system libraries.

[jettero]

I'm not sure that's quite right...

sub gmtime {
    usage "gmtime(time)" if @_ != 1;
    CORE::gmtime($_[0]);
}

verses
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They seem to be different by a kilobyte or two. I noticed they both use CORE::gmtime() though.

[ikegami]

Not at all. Look at the arguments...

Function	POSIX equivalent	Purpose of Function
CORE::gmtime	POSIX::gmtime	Returns GMT time components from epoch time.
Time::Local::timegm	[none]	Returns the epoch time from GMT time components.
CORE::localtime	POSIX::localtime	Returns local time components from epoch time.
Time::Local::timelocal	POSIX::mktime	Returns the epoch time from local time components.

POSIX is missing the very function that's needed here.