/usr/share/perl5/DBM/Deep/Iterator/File.pm is in libdbm-deep-perl 2.0011-1.
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 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 | package DBM::Deep::Iterator::File;
use strict;
use warnings FATAL => 'all';
use base qw( DBM::Deep::Iterator );
use DBM::Deep::Iterator::File::BucketList ();
use DBM::Deep::Iterator::File::Index ();
sub reset { $_[0]{breadcrumbs} = []; return }
sub get_sector_iterator {
my $self = shift;
my ($loc) = @_;
my $sector = $self->{engine}->load_sector( $loc )
or return;
if ( $sector->isa( 'DBM::Deep::Sector::File::Index' ) ) {
return DBM::Deep::Iterator::File::Index->new({
iterator => $self,
sector => $sector,
});
}
elsif ( $sector->isa( 'DBM::Deep::Sector::File::BucketList' ) ) {
return DBM::Deep::Iterator::File::BucketList->new({
iterator => $self,
sector => $sector,
});
}
DBM::Deep->_throw_error( "get_sector_iterator(): Why did $loc make a $sector?" );
}
sub get_next_key {
my $self = shift;
my ($obj) = @_;
my $crumbs = $self->{breadcrumbs};
my $e = $self->{engine};
unless ( @$crumbs ) {
# This will be a Reference sector
my $sector = $e->load_sector( $self->{base_offset} )
# If no sector is found, this must have been deleted from under us.
or return;
if ( $sector->staleness != $obj->_staleness ) {
return;
}
my $loc = $sector->get_blist_loc
or return;
push @$crumbs, $self->get_sector_iterator( $loc );
}
FIND_NEXT_KEY: {
# We're at the end.
unless ( @$crumbs ) {
$self->reset;
return;
}
my $iterator = $crumbs->[-1];
# This level is done.
if ( $iterator->at_end ) {
pop @$crumbs;
redo FIND_NEXT_KEY;
}
if ( $iterator->isa( 'DBM::Deep::Iterator::File::Index' ) ) {
# If we don't have any more, it will be caught at the
# prior check.
if ( my $next = $iterator->get_next_iterator ) {
push @$crumbs, $next;
}
redo FIND_NEXT_KEY;
}
unless ( $iterator->isa( 'DBM::Deep::Iterator::File::BucketList' ) ) {
DBM::Deep->_throw_error(
"Should have a bucketlist iterator here - instead have $iterator"
);
}
# At this point, we have a BucketList iterator
my $key = $iterator->get_next_key;
if ( defined $key ) {
return $key;
}
#XXX else { $iterator->set_to_end() } ?
# We hit the end of the bucketlist iterator, so redo
redo FIND_NEXT_KEY;
}
DBM::Deep->_throw_error( "get_next_key(): How did we get here?" );
}
1;
__END__
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