/usr/share/perl5/DateTime/TimeZone/OlsonDB/Zone.pm is in libdatetime-timezone-perl 1:1.95-1+2016a.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 | package DateTime::TimeZone::OlsonDB::Zone;
$DateTime::TimeZone::OlsonDB::Zone::VERSION = '1.95';
use strict;
use warnings;
use DateTime::TimeZone;
use DateTime::TimeZone::OlsonDB;
use DateTime::TimeZone::OlsonDB::Change;
use DateTime::TimeZone::OlsonDB::Observance;
use List::Util qw( first max );
use Params::Validate qw( validate SCALAR ARRAYREF );
sub new {
my $class = shift;
my %p = validate(
@_, {
name => { type => SCALAR },
observances => { type => ARRAYREF },
olson_db => 1,
}
);
my $self = {
name => $p{name},
observances => $p{observances},
changes => [],
infinite_rules => {},
};
return bless $self, $class;
}
sub name { $_[0]->{name} }
sub last_rules_year {
my $self = shift;
my $odb = shift;
my $last_rule = $self->{observances}[-1]{rules};
return unless $last_rule;
my @rules = $odb->rules_by_name($last_rule);
return $rules[-1]->min_year();
}
sub expand_observances {
my $self = shift;
my $odb = shift;
my $max_year = shift;
my $prev_until;
for ( my $x = 0; $x < @{ $self->{observances} }; $x++ ) {
my %p = %{ $self->{observances}[$x] };
my $rules_name = delete $p{rules};
my $last_offset_from_std
= $self->last_change ? $self->last_change->offset_from_std : 0;
my $last_offset_from_utc
= $self->last_change ? $self->last_change->offset_from_utc : 0;
my $obs = DateTime::TimeZone::OlsonDB::Observance->new(
%p,
utc_start_datetime => $prev_until,
rules => [ $odb->rules_by_name($rules_name) ],
last_offset_from_utc => $last_offset_from_utc,
last_offset_from_std => $last_offset_from_std,
);
my $rule = $obs->first_rule;
my $letter = $rule ? $rule->letter : '';
my $change = DateTime::TimeZone::OlsonDB::Change->new(
type => 'observance',
utc_start_datetime => $obs->utc_start_datetime,
local_start_datetime => $obs->local_start_datetime,
short_name => $obs->formatted_short_name($letter),
observance => $obs,
$rule ? ( rule => $rule ) : (),
);
if ($DateTime::TimeZone::OlsonDB::DEBUG) {
print "Adding observance change ...\n";
$change->_debug_output;
}
$self->add_change($change);
if ( $obs->rules ) {
$obs->expand_from_rules( $self, $max_year );
}
$prev_until = $obs->until(
$self->last_change ? $self->last_change->offset_from_std : 0 );
# last observance
if ( $x == $#{ $self->{observances} } ) {
foreach my $rule ( $obs->rules ) {
if ( $rule->is_infinite ) {
$self->add_infinite_rule($rule);
}
}
}
}
}
sub add_change {
my $self = shift;
my $change = shift;
if ( defined $change->utc_start_datetime ) {
if ( @{ $self->{changes} }
&& $self->{changes}[-1]->utc_start_datetime
&& $self->{changes}[-1]->utc_start_datetime
== $change->utc_start_datetime ) {
if ( $self->{changes}[-1]->rule && $change->observance ) {
print
" Ignoring previous rule change, that starts the same time as current observance change\n\n"
if $DateTime::TimeZone::OlsonDB::DEBUG;
$self->{changes}[-1] = $change;
return;
}
die
"Cannot add two different changes that have the same UTC start datetime!\n";
}
my $last_change = $self->last_change;
if ( $last_change->short_name eq $change->short_name
&& $last_change->total_offset == $change->total_offset
&& $last_change->is_dst == $change->is_dst
&& $last_change->observance eq $change->observance ) {
my $last_rule = $last_change->rule || '';
my $new_rule = $change->rule || '';
if ( $last_rule eq $new_rule ) {
print "Skipping identical change\n"
if $DateTime::TimeZone::OlsonDB::DEBUG;
return;
}
}
push @{ $self->{changes} }, $change;
}
else {
if ( $self->{earliest} ) {
die "There can only be one earliest time zone change!";
}
else {
$self->{earliest} = $change;
}
}
}
sub add_infinite_rule {
$_[0]->{infinite_rules}{ $_[1] } = $_[1];
}
sub last_change {
return unless @{ $_[0]->{changes} } || $_[0]->{earliest};
return (
@{ $_[0]->{changes} }
? $_[0]->{changes}[-1]
: $_[0]->{earliest}
);
}
sub sorted_changes {
(
( defined $_[0]->{earliest} ? $_[0]->{earliest} : () ),
sort { $a->utc_start_datetime <=> $b->utc_start_datetime }
@{ $_[0]->{changes} }
);
}
sub infinite_rules { values %{ $_[0]->{infinite_rules} } }
1;
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