/usr/share/perl5/Lintian/Relation/Version.pm is in lintian 2.5.43.
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 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 | # -*- perl -*-
# Lintian::Relation::Version -- comparison operators on Debian versions
# Copyright (C) 1998 Christian Schwarz and Richard Braakman
# Copyright (C) 2004-2009 Russ Allbery <rra@debian.org>
# Copyright (C) 2009 Adam D. Barratt <adam@adam-barratt.org.uk>
#
# 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 program 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/>.
package Lintian::Relation::Version;
use strict;
use warnings;
use Carp qw(croak);
use Exporter qw(import);
BEGIN {
our @EXPORT_OK = qw(versions_equal versions_lte versions_gte versions_lt
versions_gt versions_compare versions_comparator);
our %EXPORT_TAGS = ('all' => \@EXPORT_OK);
}
use AptPkg::Config '$_config';
my $versioning = $_config->system->versioning;
=head1 NAME
Lintian::Relation::Version - Comparison operators on Debian versions
=head1 SYNOPSIS
print "yes\n" if versions_equal('1.0', '1.00');
print "yes\n" if versions_gte('1.1', '1.0');
print "no\n" if versions_lte('1.1', '1.0');
print "yes\n" if versions_gt('1.1', '1.0');
print "no\n" if versions_lt('1.1', '1.1');
print "yes\n" if versions_compare('1.1', '<=', '1.1');
=head1 DESCRIPTION
This module provides five functions for comparing version numbers. The
underlying implementation uses C<libapt-pkg-perl> to ensure that
the results match what dpkg will expect.
=head1 FUNCTIONS
=over 4
=item versions_equal(A, B)
Returns true if A is equal to B (C<=>) and false otherwise.
=cut
sub versions_equal {
my ($p, $q) = @_;
my $result;
return 1 if $p eq $q;
$result = $versioning->compare($p, $q);
return ($result == 0);
}
=item versions_lte(A, B)
Returns true if A is less than or equal (C<< <= >>) to B and false
otherwise.
=cut
sub versions_lte {
my ($p, $q) = @_;
my $result;
return 1 if $p eq $q;
$result = $versioning->compare($p, $q);
return ($result <= 0);
}
=item versions_gte(A, B)
Returns true if A is greater than or equal (C<< >= >>) to B and false
otherwise.
=cut
sub versions_gte {
my ($p, $q) = @_;
my $result;
return 1 if $p eq $q;
$result = $versioning->compare($p, $q);
return ($result >= 0);
}
=item versions_lt(A, B)
Returns true if A is less than (C<<< << >>>) B and false otherwise.
=cut
sub versions_lt {
my ($p, $q) = @_;
my $result;
return 0 if $p eq $q;
$result = $versioning->compare($p, $q);
return ($result < 0);
}
=item versions_gt(A, B)
Returns true if A is greater than (C<<< >> >>>) B and false otherwise.
=cut
sub versions_gt {
my ($p, $q) = @_;
my $result;
return 0 if $p eq $q;
$result = $versioning->compare($p, $q);
return ($result > 0);
}
=item versions_compare(A, OP, B)
Returns true if A OP B, where OP is one of C<=>, C<< <= >>, C<< >= >>,
C<<< << >>>, or C<<< >> >>>, and false otherwise.
=cut
sub versions_compare {
my ($p, $op, $q) = @_;
if ($op eq '=') { return versions_equal($p, $q) }
elsif ($op eq '<=') { return versions_lte($p, $q) }
elsif ($op eq '>=') { return versions_gte($p, $q) }
elsif ($op eq '<<') { return versions_lt($p, $q) }
elsif ($op eq '>>') { return versions_gt($p, $q) }
else { croak("unknown operator $op") }
}
=item versions_comparator (A, B)
Returns -1, 0 or 1 if the version A is (respectively) less than, equal
to or greater than B. This is useful for (e.g.) sorting a list of
versions:
foreach my $version (sort versions_comparator @versions) {
...
}
=cut
# Use a prototype to avoid confusing Perl when used with sort.
sub versions_comparator ($$) {
my ($p, $q) = @_;
return $versioning->compare($p, $q);
}
=back
=head1 AUTHOR
Originally written by Russ Allbery <rra@debian.org> for Lintian and adapted
to use libapt-pkg-perl by Adam D. Barratt <adam@adam-barratt-org.uk>.
=head1 SEE ALSO
lintian(1)
=cut
1;
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