| line | true | false | branch | 
 
| 40 | 14 | 21 | if (@_) | 
 
| 54 | 3 | 1 | if (@_) | 
 
| 56 | 1 | 2 | if $self->verbosity | 
 
| 66 | 1 | 22 | unless length $isbn == 10 or length $isbn == 13 | 
 
| 68 | 14 | 8 | if (length $isbn == 13) { } | 
 
| 69 | 2 | 12 | unless $isbn =~ /^(978|979)(\d{10})$/ | 
 
| 72 | 1 | 7 | unless $isbn =~ /^(\d{10}|\d{9}X)$/ | 
 
| 87 | 17 | 2 | if $csum != 0 | 
 
| 97 | 1 | 15 | unless length $ean == 10 or length $ean == 13 | 
 
| 99 | 10 | 5 | if (length $ean == 13) { } | 
 
| 100 | 1 | 9 | unless $ean =~ /^(?:978|979)(\d{9})\d$/ | 
 
| 103 | 1 | 4 | unless $ean =~ /^(\d{9})[\dX]$/ | 
 
| 114 | 1 | 12 | if $csum == 10 | 
 
| 120 | 1 | 10 | unless my $isbn = shift() | 
 
| 125 | 1 | 9 | unless $ean | 
 
| 126 | 1 | 8 | if length $isbn == 13 and $isbn ne $ean | 
 
| 127 | 2 | 6 | if length $isbn == 10 and $isbn ne $self->convert_to_isbn10($ean) |