NAME Time::FFI - libffi interface to POSIX date and time functions SYNOPSIS use Time::FFI qw(localtime mktime strptime strftime); my $tm = strptime '1995-01-02 13:15:39', '%Y-%m-%d %H:%M:%S'; my $epoch = mktime $tm; print "$epoch: ", strftime('%I:%M:%S %p on %B %e, %Y', $tm); my $piece = $tm->to_object('Time::Piece', 1); my $tm = localtime time; my $datetime = $tm->to_object('DateTime', 1); my $tm = gmtime time; my $moment = $tm->to_object('Time::Moment', 0); DESCRIPTION Time::FFI provides a libffi interface to POSIX date and time functions found in time.h. The "gmtime" and "localtime" functions behave very differently from the core functions of the same name, as well as those exported by Time::Piece, so you may wish to call them as e.g. Time::FFI::gmtime rather than importing them. All functions will throw an exception in the event of an error. For functions other than "strftime" and "strptime", this exception will contain the syscall error message, and "$!" in perlvar will also have been set by the syscall, so you could check it after trapping the exception for finer exception handling. FUNCTIONS All functions are exported individually, or with the :all export tag. asctime my $str = asctime $tm; Returns a string in the format Wed Jun 30 21:49:08 1993\n representing the passed Time::FFI::tm record. The thread-safe asctime_r(3) function is used if available. ctime my $str = ctime $epoch; my $str = ctime; Returns a string in the format Wed Jun 30 21:49:08 1993\n representing the passed epoch timestamp (defaulting to the current time) in the local time zone. This is equivalent to "ctime" in POSIX but uses the thread-safe ctime_r(3) function if available. gmtime my $tm = gmtime $epoch; my $tm = gmtime; Returns a Time::FFI::tm record representing the passed epoch timestamp (defaulting to the current time) in UTC. The thread-safe gmtime_r(3) function is used if available. localtime my $tm = localtime $epoch; my $tm = localtime; Returns a Time::FFI::tm record representing the passed epoch timestamp (defaulting to the current time) in the local time zone. The thread-safe localtime_r(3) function is used if available. mktime my $epoch = mktime $tm; Returns the epoch timestamp representing the passed Time::FFI::tm record interpreted in the local time zone. The time is interpreted from the tm_sec, tm_min, tm_hour, tm_mday, tm_mon, tm_year, and tm_isdst members of the record, ignoring the rest. DST status will be automatically determined if tm_isdst is a negative value. The tm_isdst, tm_wday, and tm_yday members of the record will also be modified to be consistent with the interpreted time, as well as the tm_gmtoff and tm_zone elements if supported. strftime my $str = strftime $format, $tm; Returns a string formatted according to the passed format string, representing the passed Time::FFI::tm record. Consult your system's strftime(3) manual for available format descriptors. strptime my $tm = strptime $str, $format; $tm = strptime $str, $format, $tm; my $tm = strptime $str, $format, undef, \my $remaining; $tm = strptime $str, $format, $tm, \my $remaining; Returns a Time::FFI::tm record representing the passed string, parsed according to the passed format. Consult your system's strptime(3) manual for available format descriptors. The tm_mday member will default to 1 if not specified by the string, and the tm_isdst member will be set to -1; all other unspecified members will default to 0. A Time::FFI::tm record may be passed as the third argument, in which case it will be modified in place to (on most systems) update only the date/time elements which were parsed from the string. Additionally, an optional scalar reference may be passed as the fourth argument, in which case it will be set to the remaining unprocessed characters of the input string if any. This function is usually not available on Windows. BUGS Report any issues on the public bugtracker. AUTHOR Dan Book COPYRIGHT AND LICENSE This software is Copyright (c) 2019 by Dan Book. This is free software, licensed under: The Artistic License 2.0 (GPL Compatible) SEE ALSO Time::Piece, Time::Moment, DateTime, POSIX, POSIX::strptime