Here is a simple script that can convert dates to seconds and back. It also includes fraction of seconds and some other stuff. Maybe you can use it!
# TimeFormat convert UTC dates to seconds (date2sec) and
# seconds to UTC dates (sec2date) in a defined format.
# Accepted input dates for &date2sec() are
# 2005-03-28 12:00:00.001
# 2005-03-28
# 2005-102 12:00:00
# 2005-102
# 2005102 12:00:00
# 2005102
# 2005,100,12:10:00
# 2005,100 12:10:00.001
package TimeFormat ;
use strict ;
use Time::Local qw(timegm_nocheck);
use POSIX 'strftime'; # convert seconds to a formatted date
require Exporter ;
#our $SECONDS ; # set when date2sec is called
our ($VERSION, @ISA, @EXPORT, @EXPORT_OK, %EXPORT_TAGS, $Verbose, $FOR
+MAT) ;
@ISA = qw(Exporter);
@EXPORT = ();
@EXPORT_OK = qw( sec2date date2sec current2sec last_julian_day remov
+e_time format ) ;
%EXPORT_TAGS = ( Default => [qw(&date2sec)],
Both => [qw(&date2sec &sec2date)],
All => [qw(&date2sec &sec2date ¤t2sec &last
+_julian_day &remove_time &format)]);
$VERSION = 1.0 ;
$Verbose = 0 ;
# This variable is used for the conversion between dates
$FORMAT = "%Y-%m-%d %H:%M:%S.%q" ; # should be set via format()
# %Y - year including century or %y - year within century (00-99)
# %m - month (1-12)
# %d - day of month (1-31)
# %j - julian day (000-366)
# %H - hour (00-23) or %I - hour (01-12)
# %M - minute (00-59)
# %S - second (00-59)
# %q - milli second (000-999) (not in the documentation)
# %s - epoch time (xxxxxxxxxxx.xxx)
sub remove_time {
my $sec = shift ;
&date2sec( sec2date($sec,"%Y%j") ) ;
}
sub last_julian_day {
my $year = shift ;
&sec2date(date2sec("$year-12-31"),"%j") ;
}
sub current2sec {
return &date2sec( localtime() ) ;
}
# This function accepts epoch-seconds and returns a formatted date.
sub sec2date {
my ($sec, $fmt) = @_;
$fmt = $FORMAT if ! $fmt ;
# check input format
if ( $sec !~ /^\d+(?:\.\d+)?$/ ) {
$sec = &date2sec($sec) ;
}
# is input format correct ?
return $sec if ($sec !~ /^\d+(?:\.\d+)?$/) ;
## fractional part of $sec, rounded to 3 digits
my $milli = sprintf "%03.0f", 1000 * ($sec - int $sec);
# add mili-seconds (%q)
$fmt =~ s/%q/$milli/g; # change output-format for milli-seco
+nds
strftime $fmt, gmtime(int $sec);
#strftime $fmt, localtime(int $sec);
}
# converts a date to epoch seconds
sub date2sec {
my $time = undef ;
if ( @_ > 1 ) {
$time = sprintf ("%d-%.3d %.2d:%.2d:%.2d",(1900 + $_[5]),($_[7]+1)
+,$_[2],$_[1],$_[0]) ;
}
else { $time = shift ; }
return undef if ! defined $time ;
my $seconds ;
# decl. of vars.
my ( $year, $month, $day, $julian, $hour, $minute, $second, $mil
+i) ;
# convert year-only-date
$time .= "-001" if ( length($time) == 4) ;
# date is already in seconds
if ( length($time) != 7 && $time =~ /^
\d+ # seconds
(?:
\.\d+ # milli-seconds
)?
$/xg
) { $seconds = $time ; }
# split date ( with a julian day)
# elsif ( $time =~ /\d{4}(?:[-,])?(\d{3})[\s{0,},](\d\d:\d\d:\d\
+d)?/ ) {
elsif ( $time =~ /\d{4}(?:[-,])?(\d{3})\b/ ) {
( $year, $julian, $hour, $minute, $second, $mili ) = ( $time =~ m/
(\d{4}) # year
(?: # group the day - time portions
(?:
[-,] # year and julian day sep. with a , or -
)?
(\d{1,3}) # julian day
(?: # group the time portions
[\s+,] # date and time sep. by whitespaces or ,
(\d\d) # hour
:
(\d\d) # minute
:
(\d\d) # second + fractions
(?:
(\.\d+)
)?
)? # time is optional
)? # day - time is optional
/xg );
$seconds = &timegm_nocheck($second,$minute,$hour,$julian,0,$year-
+1900) + $mili ;
} # (date contains month and day)
elsif ( $time =~ /\d{4}-\d{2}-\d{2}\s{0,}?(\d\d:\d\d:\d\d)?(?:
+\.\d+)?/ ) {
( $year, $month, $day, $hour, $minute, $second, $mili ) = ( $time
+=~ m/
(\d{4}) # year
- #
(\d{2}) # month
- #
(\d{2}) # day
(?: # group the time portions
\s+ # one or more whitespace
(\d\d) # hour
:
(\d\d) # minute
:
(\d\d) # second
(?:
(\.\d+)
)?
)? # time is optional
/xg );
print STDERR __PACKAGE__." Error: Month out of range: $month\n" if
+ $month > 12;
return undef unless $month < 13 && defined $year ; # only chec
+k month
$seconds = &timegm_nocheck($second,$minute,$hour,$day,$month
+-1,$year-1900) + $mili ;
} else { return undef ; } # input date could not be parsed
return $seconds ;
}
# predefine the output format
sub format {
$FORMAT = shift ;
return 1 ; # OK
}
1;
__END__
If there are any comments on this module, please let me know!!
Luca | 