/usr/share/perl5/Ninka/SentenceTokenizer.pm is in ninka 1.3.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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use strict;
#use warnings;
use File::Basename 'dirname';
use File::Spec::Functions 'catfile';
my $TOO_LONG = 70;
sub new {
my ($class, %args) = @_;
my $self = bless({}, $class);
die "parameter 'sentences' is mandatory" unless exists $args{sentences};
my $path = dirname(__FILE__);
$self->{verbose} = ($args{verbose} // 0) == 1;
$self->{sentences} = $args{sentences};
$self->{license_sentences} = read_license_sentences(catfile($path, 'licensesentence.dict'));
return $self;
}
sub execute {
my ($self) = @_;
my @license_tokens = ();
foreach my $line (@{$self->{sentences}}) {
chomp $line;
my $original_line = $line;
if ($line =~ s/^Alternatively,? ?//) {
push @license_tokens, 'Altern';
}
$line = normalize_sentence($line);
my $save_line = $line;
my $check = 0;
my $match_name = 'UNKNOWN';
my @parameters = ();
my $distance = 1; #maximum? number
my $most_similar_name = 'UNKNOWN';
my $before;
my $after;
my $gpl = 0;
my $gpl_later;
my $gpl_version;
if (looks_like_gpl($line)) {
my $old = $line;
$gpl = 1;
($line, $gpl_later, $gpl_version) = normalize_gpl($line);
}
my ($name, $sub_rule, $number, $regexp, $option);
$save_line = $line;
my $save_gpl = $gpl;
my $LGPL = '';
foreach my $sentence (@{$self->{license_sentences}}) {
($name, $sub_rule, $number, $regexp, $option) = split /:/, $sentence;
# we need this due to the goto again
$line = $save_line;
$gpl = $save_gpl;
$LGPL = '';
again:
if ($line =~ /$regexp/im) {
$before = $`;
$after = $';
$check = 1;
$match_name = $name;
for (my $i = 1; $i <= $number; $i++) {
no strict 'refs';
push @parameters, $$i;
}
last;
} else {
# let us try again in case it is lesser/library
# do it only once
if ($gpl && $line =~ s/(Lesser|Library) GPL/GPL/i) {
$LGPL = $1;
goto again;
}
if ($gpl) {
$gpl = 0;
$line = $save_line;
goto again;
}
next;
}
last;
}
if ($check) {
# licensesentence name, param1, param2, ...
if ($gpl) {
$match_name .= 'Ver' . $gpl_version;
$match_name .= '+' if $gpl_later;
$match_name = $LGPL . $match_name;
}
if (length($before) > $TOO_LONG || length($after) > $TOO_LONG) {
$match_name .= '-TOOLONG';
}
# TODO: Use of uninitialized value in @parameters
my $parameter_string = join ';', $match_name, $sub_rule, $before, $after, @parameters;
push @license_tokens, "$parameter_string:$original_line";
} else {
# UNKNOWN, sentence
chomp $line;
my $parameter_string = join ';', $match_name, 0, $most_similar_name, $distance, $save_line;
push @license_tokens, "$parameter_string:$original_line";
}
}
return \@license_tokens;
}
sub normalize_gpl {
my ($line) = @_;
my $later = 0;
my $version = 0;
# do some very quick spelling corrections for english/british words
$line =~ s/Version 2,? \(June 1991\)/Version 2/gi;
$line =~ s/Version 2,? dated June 1991/Version 2/gi;
$line =~ s/Version 2\.1,? dated February 1999/Version 2.1/gi;
if ($line =~ s/,? or \(?at your option\)?,? any later version//i) {
$later = 1;
}
if ($line =~ s/, or any later version//i) {
$later = 1;
}
if ($line =~ s/ or (greater|later)//i) {
$later = 1;
}
if ($line =~ s/or (greater|later) //i) {
$later = 1;
}
if ($line =~ s/(version|v\.?) ([123\.0]+)/<VERSION>/i) {
$version = $2;
}
if ($line =~ s/GPL ?[v\-]([123\.0]+)/GPL <VERSION>/i) {
$version = $1;
}
if ($line =~ s/v\.?([123\.0]+)( *[0-9]+)/<VERSION>$2/i) {
$version = $1;
}
$line =~ s/(distributable|licensed|released|made available)/<LICENSED>/ig;
$line =~ s/Library General Public License/Library General Public License/ig;
$line =~ s/Lesser General Public License/Lesser General Public License/ig;
$line =~ s/General Public License/GPL/gi;
$line =~ s/GPL \(GPL\)/GPL/gi;
$line =~ s/GPL \(<QUOTES>GPL<QUOTES>\)/GPL/gi;
$line =~ s/GNU //gi;
$line =~ s/under GPL/under the GPL/gi;
$line =~ s/under Lesser/under the Lesser/gi;
$line =~ s/under Library/under the Library/gi;
$line =~ s/of GPL/of the GPL/gi;
$line =~ s/of Lesser/of the Lesser/gi;
$line =~ s/of Library/of the Library/gi;
$line =~ s/(can|may)/can/gi;
$line =~ s/<VERSION> only/<VERSION>/gi;
$line =~ s/<VERSION> of the license/<VERSION>/gi;
$line =~ s/(<VERSION>|GPL),? as published by the Free Software Foundation/$1/gi;
$line =~ s/(<VERSION>|GPL) \(as published by the Free Software Foundation\)/$1/gi;
$line =~ s/(<VERSION>|GPL),? incorporated herein by reference/$1/gi;
$line =~ s/terms and conditions/terms/gi;
$line =~ s/GPL along with/GPL with/gi;
$line =~ s/GPL \(<VERSION\)/GPL <VERSION>/gi;
$line =~ s/ +/ /;
$line =~ s/ +$//;
return ($line, $later, $version);
}
sub looks_like_gpl {
my ($line) = @_;
return $line =~ /GNU|GPL|General Public License/;
}
sub normalize_sentence {
my ($line) = @_;
# do some very quick spelling corrections for english/british words
$line =~ s/icence/icense/ig;
$line =~ s/[.;]$//;
return $line;
}
sub read_license_sentences {
my ($file) = @_;
my @license_sentences = ();
open my $fh, '<', $file or die "can't open file [$file]: $!";
while (my $line = <$fh>) {
chomp $line;
next if $line =~ /^\#/;
next if $line =~ /^ *$/;
die "illegal format in license expression [$line]" unless $line =~ /(.*?):(.*?):(.*)/;
push @license_sentences, $line;
}
close $fh;
return \@license_sentences;
}
1;
__END__
=head1 NAME
Ninka::SentenceTokenizer - Display recognized sentence token
=head1 DESCRIPTION
For each sentence, it outputs its recognized sentence token, or unknown otherwise.
=head1 COPYRIGHT AND LICENSE
Copyright (C) 2009-2014 Yuki Manabe and Daniel M. German
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This patch is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
=cut
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