/usr/share/perl5/Test/Deep/Cache/Simple.pm is in libtest-deep-perl 1.127-1.
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 | use strict;
use warnings;
package Test::Deep::Cache::Simple;
use Carp qw( confess );
use Scalar::Util qw( refaddr );
BEGIN
{
if (grep /^weaken$/, @Scalar::Util::EXPORT_FAIL)
{
# we're running on a version of perl that has no weak refs, so we
# just install a no-op sub for weaken instead of importing it
*weaken = sub {};
}
else
{
Scalar::Util->import('weaken');
}
}
sub new
{
my $pkg = shift;
my $self = bless {}, $pkg;
return $self;
}
sub add
{
my $self = shift;
my ($d1, $d2) = @_;
{
local $SIG{__DIE__};
local $@;
# cannot weaken read only refs, no harm if we can't as they never
# disappear
eval{weaken($d1)};
eval{weaken($d2)};
}
$self->{fn_get_key(@_)} = [$d1, $d2];
}
sub cmp
{
my $self = shift;
my $key = fn_get_key(@_);
my $pair = $self->{$key};
# are both weakened refs still valid, if not delete this entry
if (ref($pair->[0]) and ref($pair->[1]))
{
return 1;
}
else
{
delete $self->{$key};
return 0;
}
}
sub absorb
{
my $self = shift;
my $other = shift;
@{$self}{keys %$other} = values %$other;
}
sub fn_get_key
{
return join(",", sort (map {refaddr($_)} @_));
}
1;
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