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DateTime.pm
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DateTime.pm
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package perl5i::DateTime;
# A file to contain the Datetime work for perl5i to get it out of perl5i.pm
use 5.010;
use strict;
use warnings;
## no critic (Subroutines::ProhibitSubroutinePrototypes)
sub dt_gmtime (;$) {
my $time = @_ ? shift : time;
return CORE::gmtime($time) if wantarray;
require DateTime;
return DateTime::y2038->from_epoch(
epoch => $time + 0,
formatter => "DateTime::Format::CTime"
);
}
## no critic (Subroutines::ProhibitSubroutinePrototypes)
sub dt_localtime (;$) {
my $time = @_ ? shift : time;
return CORE::localtime($time) if wantarray;
require DateTime;
return DateTime::y2038->from_epoch(
epoch => $time + 0,
time_zone => "local",
formatter => "DateTime::Format::CTime"
);
}
## no critic (Subroutines::ProhibitSubroutinePrototypes)
sub dt_time () {
require DateTime::Format::Epoch;
state $formatter = DateTime::Format::Epoch->new( epoch => DateTime->from_epoch( epoch => 0 ) );
require DateTime;
return DateTime::time->from_epoch(
epoch => time,
formatter => $formatter
);
}
{
package DateTime::y2038;
# Don't load DateTime until we need it.
our @ISA = qw(DateTime);
# Override gmtime and localtime with straight emulations
# so we can override it later.
{
*CORE::GLOBAL::gmtime = sub (;$) {
return @_ ? CORE::gmtime( $_[0] ) : CORE::gmtime();
};
*CORE::GLOBAL::localtime = sub (;$) {
return @_ ? CORE::localtime( $_[0] ) : CORE::localtime();
};
}
sub from_epoch {
my $class = shift;
require Time::y2038;
no warnings 'redefine';
local *CORE::GLOBAL::gmtime = \&Time::y2038::gmtime;
local *CORE::GLOBAL::localtime = \&Time::y2038::localtime;
return $class->SUPER::from_epoch(@_);
}
# Copy of DateTime's own epoch() function.
sub epoch {
my $self = shift;
my $zone = $self->time_zone;
$self->set_time_zone("UTC");
require Time::y2038;
my $time = Time::y2038::timegm(
$self->sec, $self->min, $self->hour, $self->mday,
$self->mon - 1,
$self->year - 1900,
);
$self->set_time_zone($zone);
return $time;
}
}
{
package DateTime::time;
use parent -norequire, qw(DateTime::y2038);
use overload
"0+" => sub { $_[0]->epoch },
"-" => sub {
my( $a, $b, $reverse ) = @_;
if($reverse) {
( $b, $a ) = ( $a, $b );
}
my $time_a = eval { $a->isa("DateTime") } ? $a->epoch : $a;
my $time_b = eval { $b->isa("DateTime") } ? $b->epoch : $b;
return $time_a - $time_b;
},
"+" => sub {
my( $a, $b, $reverse ) = @_;
if($reverse) {
( $b, $a ) = ( $a, $b );
}
my $time_a = eval { $a->isa("DateTime") } ? $a->epoch : $a;
my $time_b = eval { $b->isa("DateTime") } ? $b->epoch : $b;
return $time_a + $time_b;
},
fallback => 1;
}
{
package DateTime::Format::CTime;
use CLASS;
sub new {
return bless {}, $CLASS;
}
sub format_datetime {
my $self = shift;
my $dt = shift;
# Straight from the Open Group asctime() docs.
return sprintf "%.3s %.3s%3d %.2d:%.2d:%.2d %d",
$dt->day_abbr,
$dt->month_abbr,
$dt->mday,
$dt->hour,
$dt->min,
$dt->sec,
$dt->year,
;
}
}
1;