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#! /usr/bin/env perl
# Copyright 2018 The OpenSSL Project Authors. All Rights Reserved.
#
# Licensed under the Apache License 2.0 (the "License"). You may not use
# this file except in compliance with the License. You can obtain a copy
# in the file LICENSE in the source distribution or at
# https://www.openssl.org/source/license.html
package OpenSSL::Ordinals;
use strict;
use warnings;
use Carp;
use Exporter;
use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);
$VERSION = "0.1";
@ISA = qw(Exporter);
@EXPORT = qw(cmp_versions);
@EXPORT_OK = qw();
=head1 NAME
OpenSSL::Util - small OpenSSL utilities
=head1 SYNOPSIS
use OpenSSL::Util;
$versiondiff = cmp_versions('1.0.2k', '3.0.1');
# $versiondiff should be -1
$versiondiff = cmp_versions('1.1.0', '1.0.2a');
# $versiondiff should be 1
$versiondiff = cmp_versions('1.1.1', '1.1.1');
# $versiondiff should be 0
=head1 DESCRIPTION
=over
=item B<cmp_versions "VERSION1", "VERSION2">
Compares VERSION1 with VERSION2, paying attention to OpenSSL versioning.
Returns 1 if VERSION1 is greater than VERSION2, 0 if they are equal, and
-1 if VERSION1 is less than VERSION2.
=back
=cut
# Until we're rid of everything with the old version scheme,
# we need to be able to handle older style x.y.zl versions.
# In terms of comparison, the x.y.zl and the x.y.z schemes
# are compatible... mostly because the latter starts at a
# new major release with a new major number.
sub _ossl_versionsplit {
my $textversion = shift;
return $textversion if $textversion eq '*';
my ($major,$minor,$edit,$letter) =
$textversion =~ /^(\d+)\.(\d+)\.(\d+)([a-z]{0,2})$/;
return ($major,$minor,$edit,$letter);
}
sub cmp_versions {
my @a_split = _ossl_versionsplit(shift);
my @b_split = _ossl_versionsplit(shift);
my $verdict = 0;
while (@a_split) {
# The last part is a letter sequence (or a '*')
if (scalar @a_split == 1) {
$verdict = $a_split[0] cmp $b_split[0];
} else {
$verdict = $a_split[0] <=> $b_split[0];
}
shift @a_split;
shift @b_split;
last unless $verdict == 0;
}
return $verdict;
}
1;
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