BitString.pm

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=head1 LICENSE
 
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=cut
 
 
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=cut
 
=head1 NAME
 
Bio::EnsEMBL::Utils::BitString - bitstring object implementation
 
=head1 DESCRIPTION
 
This is an implementation of a bitstring object, taken from Damian
Convey's book "Object Oriented Perl".
 
=head1 METHODS
 
=cut
 
 
package Bio::EnsEMBL::Utils::BitString;
 
use strict;
use warnings;
no warnings 'uninitialized';
 
 
sub new {
  my $class = ref($_[0])||$_[0];
  my $initbits = join '', map {$_?1:0} @_[1..$#_];
  my $bs = pack 'b*', $initbits;
  bless \$bs, $class;
}
 
 
sub get {
  my ($self, $bitnum) = @_;
  return vec($$self,$bitnum,1);
}
 
 
sub set {
  my ($self, $bitnum, $newval) = @_;
  vec($$self,$bitnum,1) = $newval?1:0;
}
 
 
sub bitcount {
  8 * length ${$_[0]};
}
 
 
sub complement {
  my ($self) = @_;
  my $complement = ~$$self;
  bless \$complement, ref($self);
}
 
 
sub print_me {
  my ($self) = @_;
  for (my $i=0; $i < $self->bitcount(); $i++)
  {
    print $self->get($i);
    print ' ' unless ($i+1)%8;
    print "\n" unless ($i+1)%64;
  }
  print "\n";
}
 
 
1;