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1 =head1 LICENSE
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2
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3 Copyright (c) 1999-2012 The European Bioinformatics Institute and
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4 Genome Research Limited. All rights reserved.
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5
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6 This software is distributed under a modified Apache license.
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7 For license details, please see
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8
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9 http://www.ensembl.org/info/about/code_licence.html
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10
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11 =head1 CONTACT
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12
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13 Please email comments or questions to the public Ensembl
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14 developers list at <dev@ensembl.org>.
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15
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16 Questions may also be sent to the Ensembl help desk at
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17 <helpdesk@ensembl.org>.
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18
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19 =cut
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20
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21 =head1 NAME
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22
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23 Bio::EnsEMBL::Utils::BitString - bitstring object implementation
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24
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25 =head1 DESCRIPTION
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26
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27 This is an implementation of a bitstring object, taken from Damian
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28 Convey's book "Object Oriented Perl".
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29
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30 =head1 METHODS
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31
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32 =cut
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33
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34
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35 package Bio::EnsEMBL::Utils::BitString;
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36
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37 use strict;
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38 use warnings;
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39 no warnings 'uninitialized';
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40
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41
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42 sub new {
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43 my $class = ref($_[0])||$_[0];
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44 my $initbits = join '', map {$_?1:0} @_[1..$#_];
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45 my $bs = pack 'b*', $initbits;
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46 bless \$bs, $class;
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47 }
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48
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49
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50 sub get {
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51 my ($self, $bitnum) = @_;
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52 return vec($$self,$bitnum,1);
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53 }
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54
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55
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56 sub set {
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57 my ($self, $bitnum, $newval) = @_;
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58 vec($$self,$bitnum,1) = $newval?1:0;
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59 }
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60
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61
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62 sub bitcount {
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63 8 * length ${$_[0]};
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64 }
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65
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66
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67 sub complement {
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68 my ($self) = @_;
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69 my $complement = ~$$self;
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70 bless \$complement, ref($self);
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71 }
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72
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73
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74 sub print_me {
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75 my ($self) = @_;
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76 for (my $i=0; $i < $self->bitcount(); $i++)
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77 {
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78 print $self->get($i);
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79 print ' ' unless ($i+1)%8;
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80 print "\n" unless ($i+1)%64;
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81 }
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82 print "\n";
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83 }
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84
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85
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86 1;
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87
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