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Piece.pm	22.958 KB	-rw-r--r--	2023-10-25 12:41	R E G D
Seconds.pm	5.195 KB	-rw-r--r--	2023-10-25 12:41	R E G D
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package Time::Piece; use strict; require Exporter; require DynaLoader; use Time::Seconds; use Carp; use Time::Local; our @ISA = qw(Exporter DynaLoader); our @EXPORT = qw( localtime gmtime ); our %EXPORT_TAGS = ( ':override' => 'internal', ); our $VERSION = '1.20_01'; bootstrap Time::Piece $VERSION; my $DATE_SEP = '-'; my $TIME_SEP = ':'; my @MON_LIST = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec); my @FULLMON_LIST = qw(January February March April May June July August September October November December); my @DAY_LIST = qw(Sun Mon Tue Wed Thu Fri Sat); my @FULLDAY_LIST = qw(Sunday Monday Tuesday Wednesday Thursday Friday Saturday); use constant 'c_sec' => 0; use constant 'c_min' => 1; use constant 'c_hour' => 2; use constant 'c_mday' => 3; use constant 'c_mon' => 4; use constant 'c_year' => 5; use constant 'c_wday' => 6; use constant 'c_yday' => 7; use constant 'c_isdst' => 8; use constant 'c_epoch' => 9; use constant 'c_islocal' => 10; sub localtime { unshift @_, __PACKAGE__ unless eval { $_[0]->isa('Time::Piece') }; my $class = shift; my $time = shift; $time = time if (!defined $time); $class->_mktime($time, 1); } sub gmtime { unshift @_, __PACKAGE__ unless eval { $_[0]->isa('Time::Piece') }; my $class = shift; my $time = shift; $time = time if (!defined $time); $class->_mktime($time, 0); } sub new { my $class = shift; my ($time) = @_; my $self; if (defined($time)) { $self = $class->localtime($time); } elsif (ref($class) && $class->isa(__PACKAGE__)) { $self = $class->_mktime($class->epoch, $class->[c_islocal]); } else { $self = $class->localtime(); } return bless $self, ref($class) || $class; } sub parse { my $proto = shift; my $class = ref($proto) || $proto; my @components; if (@_ > 1) { @components = @_; } else { @components = shift =~ /(\d+)$DATE_SEP(\d+)$DATE_SEP(\d+)(?:(?:T|\s+)(\d+)$TIME_SEP(\d+)(?:$TIME_SEP(\d+)))/; @components = reverse(@components[0..5]); } return $class->new(_strftime("%s", @components)); } sub _mktime { my ($class, $time, $islocal) = @_; $class = eval { (ref $class) && (ref $class)->isa('Time::Piece') } ? ref $class : $class; if (ref($time)) { $time->[c_epoch] = undef; return wantarray ? @$time : bless [@$time[0..9], $islocal], $class; } _tzset(); my @time = $islocal ? CORE::localtime($time) : CORE::gmtime($time); wantarray ? @time : bless [@time, $time, $islocal], $class; } my %_special_exports = ( localtime => sub { my $c = $_[0]; sub { $c->localtime(@_) } }, gmtime => sub { my $c = $_[0]; sub { $c->gmtime(@_) } }, ); sub export { my ($class, $to, @methods) = @_; for my $method (@methods) { if (exists $_special_exports{$method}) { no strict 'refs'; no warnings 'redefine'; *{$to . "::$method"} = $_special_exports{$method}->($class); } else { $class->SUPER::export($to, $method); } } } sub import { # replace CORE::GLOBAL localtime and gmtime if required my $class = shift; my %params; map($params{$_}++,@_,@EXPORT); if (delete $params{':override'}) { $class->export('CORE::GLOBAL', keys %params); } else { $class->export((caller)[0], keys %params); } } ## Methods ## sub sec { my $time = shift; $time->[c_sec]; } *second = \&sec; sub min { my $time = shift; $time->[c_min]; } *minute = \&min; sub hour { my $time = shift; $time->[c_hour]; } sub mday { my $time = shift; $time->[c_mday]; } *day_of_month = \&mday; sub mon { my $time = shift; $time->[c_mon] + 1; } sub _mon { my $time = shift; $time->[c_mon]; } sub month { my $time = shift; if (@_) { return $_[$time->[c_mon]]; } elsif (@MON_LIST) { return $MON_LIST[$time->[c_mon]]; } else { return $time->strftime('%b'); } } *monname = \&month; sub fullmonth { my $time = shift; if (@_) { return $_[$time->[c_mon]]; } elsif (@FULLMON_LIST) { return $FULLMON_LIST[$time->[c_mon]]; } else { return $time->strftime('%B'); } } sub year { my $time = shift; $time->[c_year] + 1900; } sub _year { my $time = shift; $time->[c_year]; } sub yy { my $time = shift; my $res = $time->[c_year] % 100; return $res > 9 ? $res : "0$res"; } sub wday { my $time = shift; $time->[c_wday] + 1; } sub _wday { my $time = shift; $time->[c_wday]; } *day_of_week = \&_wday; sub wdayname { my $time = shift; if (@_) { return $_[$time->[c_wday]]; } elsif (@DAY_LIST) { return $DAY_LIST[$time->[c_wday]]; } else { return $time->strftime('%a'); } } *day = \&wdayname; sub fullday { my $time = shift; if (@_) { return $_[$time->[c_wday]]; } elsif (@FULLDAY_LIST) { return $FULLDAY_LIST[$time->[c_wday]]; } else { return $time->strftime('%A'); } } sub yday { my $time = shift; $time->[c_yday]; } *day_of_year = \&yday; sub isdst { my $time = shift; $time->[c_isdst]; } *daylight_savings = \&isdst; # Thanks to Tony Olekshy for this algorithm sub tzoffset { my $time = shift; return Time::Seconds->new(0) unless $time->[c_islocal]; my $epoch = $time->epoch; my $j = sub { my ($s,$n,$h,$d,$m,$y) = @_; $m += 1; $y += 1900; $time->_jd($y, $m, $d, $h, $n, $s); }; # Compute floating offset in hours. # # Note use of crt methods so the tz is properly set... # See: http://perlmonks.org/?node_id=820347 my $delta = 24 * ($j->(_crt_localtime($epoch)) - $j->(_crt_gmtime($epoch))); # Return value in seconds rounded to nearest minute. return Time::Seconds->new( int($delta * 60 + ($delta >= 0 ? 0.5 : -0.5)) * 60 ); } sub epoch { my $time = shift; if (defined($time->[c_epoch])) { return $time->[c_epoch]; } else { my $epoch = $time->[c_islocal] ? timelocal(@{$time}[c_sec .. c_mon], $time->[c_year]+1900) : timegm(@{$time}[c_sec .. c_mon], $time->[c_year]+1900); $time->[c_epoch] = $epoch; return $epoch; } } sub hms { my $time = shift; my $sep = @_ ? shift(@_) : $TIME_SEP; sprintf("%02d$sep%02d$sep%02d", $time->[c_hour], $time->[c_min], $time->[c_sec]); } *time = \&hms; sub ymd { my $time = shift; my $sep = @_ ? shift(@_) : $DATE_SEP; sprintf("%d$sep%02d$sep%02d", $time->year, $time->mon, $time->[c_mday]); } *date = \&ymd; sub mdy { my $time = shift; my $sep = @_ ? shift(@_) : $DATE_SEP; sprintf("%02d$sep%02d$sep%d", $time->mon, $time->[c_mday], $time->year); } sub dmy { my $time = shift; my $sep = @_ ? shift(@_) : $DATE_SEP; sprintf("%02d$sep%02d$sep%d", $time->[c_mday], $time->mon, $time->year); } sub datetime { my $time = shift; my %seps = (date => $DATE_SEP, T => 'T', time => $TIME_SEP, @_); return join($seps{T}, $time->date($seps{date}), $time->time($seps{time})); } # Julian Day is always calculated for UT regardless # of local time sub julian_day { my $time = shift; # Correct for localtime $time = $time->gmtime( $time->epoch ) if $time->[c_islocal]; # Calculate the Julian day itself my $jd = $time->_jd( $time->year, $time->mon, $time->mday, $time->hour, $time->min, $time->sec); return $jd; } # MJD is defined as JD - 2400000.5 days sub mjd { return shift->julian_day - 2_400_000.5; } # Internal calculation of Julian date. Needed here so that # both tzoffset and mjd/jd methods can share the code # Algorithm from Hatcher 1984 (QJRAS 25, 53-55), and # Hughes et al, 1989, MNRAS, 238, 15 # See: http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1989MNRAS.238.1529H&db_key=AST # for more details sub _jd { my $self = shift; my ($y, $m, $d, $h, $n, $s) = @_; # Adjust input parameters according to the month $y = ( $m > 2 ? $y : $y - 1); $m = ( $m > 2 ? $m - 3 : $m + 9); # Calculate the Julian Date (assuming Julian calendar) my $J = int( 365.25 *( $y + 4712) ) + int( (30.6 * $m) + 0.5) + 59 + $d - 0.5; # Calculate the Gregorian Correction (since we have Gregorian dates) my $G = 38 - int( 0.75 * int(49+($y/100))); # Calculate the actual Julian Date my $JD = $J + $G; # Modify to include hours/mins/secs in floating portion. return $JD + ($h + ($n + $s / 60) / 60) / 24; } sub week { my $self = shift; my $J = $self->julian_day; # Julian day is independent of time zone so add on tzoffset # if we are using local time here since we want the week day # to reflect the local time rather than UTC $J += ($self->tzoffset/(24*3600)) if $self->[c_islocal]; # Now that we have the Julian day including fractions # convert it to an integer Julian Day Number using nearest # int (since the day changes at midday we oconvert all Julian # dates to following midnight). $J = int($J+0.5); use integer; my $d4 = ((($J + 31741 - ($J % 7)) % 146097) % 36524) % 1461; my $L = $d4 / 1460; my $d1 = (($d4 - $L) % 365) + $L; return $d1 / 7 + 1; } sub _is_leap_year { my $year = shift; return (($year %4 == 0) && !($year % 100 == 0)) || ($year % 400 == 0) ? 1 : 0; } sub is_leap_year { my $time = shift; my $year = $time->year; return _is_leap_year($year); } my @MON_LAST = qw(31 28 31 30 31 30 31 31 30 31 30 31); sub month_last_day { my $time = shift; my $year = $time->year; my $_mon = $time->_mon; return $MON_LAST[$_mon] + ($_mon == 1 ? _is_leap_year($year) : 0); } sub strftime { my $time = shift; my $tzname = $time->[c_islocal] ? '%Z' : 'UTC'; my $format = @_ ? shift(@_) : "%a, %d %b %Y %H:%M:%S $tzname"; if (!defined $time->[c_wday]) { if ($time->[c_islocal]) { return _strftime($format, CORE::localtime($time->epoch)); } else { return _strftime($format, CORE::gmtime($time->epoch)); } } return _strftime($format, (@$time)[c_sec..c_isdst]); } sub strptime { my $time = shift; my $string = shift; my $format = @_ ? shift(@_) : "%a, %d %b %Y %H:%M:%S %Z"; my @vals = _strptime($string, $format); # warn(sprintf("got vals: %d-%d-%d %d:%d:%d\n", reverse(@vals))); return scalar $time->_mktime(\@vals, (ref($time) ? $time->[c_islocal] : 0)); } sub day_list { shift if ref($_[0]) && $_[0]->isa(__PACKAGE__); # strip first if called as a method my @old = @DAY_LIST; if (@_) { @DAY_LIST = @_; } return @old; } sub mon_list { shift if ref($_[0]) && $_[0]->isa(__PACKAGE__); # strip first if called as a method my @old = @MON_LIST; if (@_) { @MON_LIST = @_; } return @old; } sub time_separator { shift if ref($_[0]) && $_[0]->isa(__PACKAGE__); my $old = $TIME_SEP; if (@_) { $TIME_SEP = $_[0]; } return $old; } sub date_separator { shift if ref($_[0]) && $_[0]->isa(__PACKAGE__); my $old = $DATE_SEP; if (@_) { $DATE_SEP = $_[0]; } return $old; } use overload '""' => \&cdate, 'cmp' => \&str_compare, 'fallback' => undef; sub cdate { my $time = shift; if ($time->[c_islocal]) { return scalar(CORE::localtime($time->epoch)); } else { return scalar(CORE::gmtime($time->epoch)); } } sub str_compare { my ($lhs, $rhs, $reverse) = @_; if (UNIVERSAL::isa($rhs, 'Time::Piece')) { $rhs = "$rhs"; } return $reverse ? $rhs cmp $lhs->cdate : $lhs->cdate cmp $rhs; } use overload '-' => \&subtract, '+' => \&add; sub subtract { my $time = shift; my $rhs = shift; if (UNIVERSAL::isa($rhs, 'Time::Seconds')) { $rhs = $rhs->seconds; } if (shift) { # SWAPED is set (so someone tried an expression like NOTDATE - DATE). # Imitate Perl's standard behavior and return the result as if the # string $time resolves to was subtracted from NOTDATE. This way, # classes which override this one and which have a stringify function # that resolves to something that looks more like a number don't need # to override this function. return $rhs - "$time"; } if (UNIVERSAL::isa($rhs, 'Time::Piece')) { return Time::Seconds->new($time->epoch - $rhs->epoch); } else { # rhs is seconds. return $time->_mktime(($time->epoch - $rhs), $time->[c_islocal]); } } sub add { my $time = shift; my $rhs = shift; if (UNIVERSAL::isa($rhs, 'Time::Seconds')) { $rhs = $rhs->seconds; } croak "Invalid rhs of addition: $rhs" if ref($rhs); return $time->_mktime(($time->epoch + $rhs), $time->[c_islocal]); } use overload '<=>' => \&compare; sub get_epochs { my ($lhs, $rhs, $reverse) = @_; if (!UNIVERSAL::isa($rhs, 'Time::Piece')) { $rhs = $lhs->new($rhs); } if ($reverse) { return $rhs->epoch, $lhs->epoch; } return $lhs->epoch, $rhs->epoch; } sub compare { my ($lhs, $rhs) = get_epochs(@_); return $lhs <=> $rhs; } sub add_months { my ($time, $num_months) = @_; croak("add_months requires a number of months") unless defined($num_months); my $final_month = $time->_mon + $num_months; my $num_years = 0; if ($final_month > 11 || $final_month < 0) { # these two ops required because we have no POSIX::floor and don't # want to load POSIX.pm if ($final_month < 0 && $final_month % 12 == 0) { $num_years = int($final_month / 12) + 1; } else { $num_years = int($final_month / 12); } $num_years-- if ($final_month < 0); $final_month = $final_month % 12; } my @vals = _mini_mktime($time->sec, $time->min, $time->hour, $time->mday, $final_month, $time->year - 1900 + $num_years); # warn(sprintf("got %d vals: %d-%d-%d %d:%d:%d [%d]\n", scalar(@vals), reverse(@vals), $time->[c_islocal])); return scalar $time->_mktime(\@vals, $time->[c_islocal]); } sub add_years { my ($time, $years) = @_; $time->add_months($years * 12); } 1; __END__ =head1 NAME Time::Piece - Object Oriented time objects =head1 SYNOPSIS use Time::Piece; my $t = localtime; print "Time is $t\n"; print "Year is ", $t->year, "\n"; =head1 DESCRIPTION This module replaces the standard localtime and gmtime functions with implementations that return objects. It does so in a backwards compatible manner, so that using localtime/gmtime in the way documented in perlfunc will still return what you expect. The module actually implements most of an interface described by Larry Wall on the perl5-porters mailing list here: http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2000-01/msg00241.html =head1 USAGE After importing this module, when you use localtime or gmtime in a scalar context, rather than getting an ordinary scalar string representing the date and time, you get a Time::Piece object, whose stringification happens to produce the same effect as the localtime and gmtime functions. There is also a new() constructor provided, which is the same as localtime(), except when passed a Time::Piece object, in which case it's a copy constructor. The following methods are available on the object: $t->sec # also available as $t->second $t->min # also available as $t->minute $t->hour # 24 hour $t->mday # also available as $t->day_of_month $t->mon # 1 = January $t->_mon # 0 = January $t->monname # Feb $t->month # same as $t->monname $t->fullmonth # February $t->year # based at 0 (year 0 AD is, of course 1 BC) $t->_year # year minus 1900 $t->yy # 2 digit year $t->wday # 1 = Sunday $t->_wday # 0 = Sunday $t->day_of_week # 0 = Sunday $t->wdayname # Tue $t->day # same as wdayname $t->fullday # Tuesday $t->yday # also available as $t->day_of_year, 0 = Jan 01 $t->isdst # also available as $t->daylight_savings $t->hms # 12:34:56 $t->hms(".") # 12.34.56 $t->time # same as $t->hms $t->ymd # 2000-02-29 $t->date # same as $t->ymd $t->mdy # 02-29-2000 $t->mdy("/") # 02/29/2000 $t->dmy # 29-02-2000 $t->dmy(".") # 29.02.2000 $t->datetime # 2000-02-29T12:34:56 (ISO 8601) $t->cdate # Tue Feb 29 12:34:56 2000 "$t" # same as $t->cdate $t->epoch # seconds since the epoch $t->tzoffset # timezone offset in a Time::Seconds object $t->julian_day # number of days since Julian period began $t->mjd # modified Julian date (JD-2400000.5 days) $t->week # week number (ISO 8601) $t->is_leap_year # true if it its $t->month_last_day # 28-31 $t->time_separator($s) # set the default separator (default ":") $t->date_separator($s) # set the default separator (default "-") $t->day_list(@days) # set the default weekdays $t->mon_list(@days) # set the default months $t->strftime(FORMAT) # same as POSIX::strftime (without the overhead # of the full POSIX extension) $t->strftime() # "Tue, 29 Feb 2000 12:34:56 GMT" Time::Piece->strptime(STRING, FORMAT) # see strptime man page. Creates a new # Time::Piece object =head2 Local Locales Both wdayname (day) and monname (month) allow passing in a list to use to index the name of the days against. This can be useful if you need to implement some form of localisation without actually installing or using locales. my @days = qw( Dimanche Lundi Merdi Mercredi Jeudi Vendredi Samedi ); my $french_day = localtime->day(@days); These settin