/usr/share/perl5/Graph/Matrix.pm is in libgraph-perl 1:0.96-2.
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 | package Graph::Matrix;
# $SIG{__DIE__ } = sub { use Carp; confess };
# $SIG{__WARN__} = sub { use Carp; confess };
use strict;
sub new {
my ($class, $g) = @_;
my @V = $g->vertices;
my $V = @V;
my %V; @V{ @V } = 0 .. $#V;
bless [ [ map { [ ] } 0 .. $#V ], \%V ], $class;
}
sub set {
my ($m, $u, $v, $val) = @_;
my ($i, $j) = map { $m->[1]->{ $_ } } ($u, $v);
$m->[0]->[$i]->[$j] = $val;
}
sub get {
my ($m, $u, $v) = @_;
my ($i, $j) = map { $m->[1]->{ $_ } } ($u, $v);
$m->[0]->[$i]->[$j];
}
1;
__END__
=pod
=head1 NAME
Graph::Matrix - create and manipulate a V x V matrix of graph G
=head1 SYNOPSIS
use Graph::Matrix;
use Graph::Directed;
my $g = Graph::Directed->new;
$g->add_...(); # build $g
my $m = Graph::Matrix->new($g);
$m->get($u, $v)
$s->get($u, $v, $val)
=head1 DESCRIPTION
B<This module is meant for internal use by the Graph module.>
=head2 Class Methods
=over 4
=item new($g)
Construct a new Matrix from the Graph $g.
=back
=head2 Object Methods
=over 4
=item get($u, $v)
Return the value at the edge from $u to $v.
=item set($u, $v, $val)
Set the edge from $u to $v to value $val.
=back
=head1 AUTHOR AND COPYRIGHT
Jarkko Hietaniemi F<jhi@iki.fi>
=head1 LICENSE
This module is licensed under the same terms as Perl itself.
=cut
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