mirror of
https://github.com/percona/percona-toolkit.git
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5402b92110
- Updated reference of legacy FSF address with currently recommended way to get actual copy of GPL 2. - Replaced "Percona Ireland Ltd." and other old Percona names with "Percona LLC and/or it affiliates" - Updated copyright year for these outdated entries
68 lines
2.1 KiB
Perl
68 lines
2.1 KiB
Perl
# This program is copyright 2016-2026 Percona LLC and/or its affiliates.
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# Feedback and improvements are welcome.
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#
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# THIS PROGRAM IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
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# WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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# MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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#
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# This program is free software; you can redistribute it and/or modify it under
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# the terms of the GNU General Public License as published by the Free Software
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# Foundation, version 2; OR the Perl Artistic License. On UNIX and similar
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# systems, you can issue `man perlgpl' or `man perlartistic' to read these
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# licenses.
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#
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# You should have received a copy of the GNU General Public License, version 2
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# along with this program; if not, see <https://www.gnu.org/licenses/>.
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# ###########################################################################
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# VersionCompare package
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# ###########################################################################
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# The purpose of this very simple module is to compare MySQL version strings
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# There's VersionParser and the perl core "version" module, but I wanted
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# something simpler and that could grow incrementally
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{
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package VersionCompare;
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use strict;
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use English qw(-no_match_vars);
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use constant PTDEBUG => $ENV{PTDEBUG} || 0;
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sub cmp {
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my ($v1, $v2) = @_;
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# Remove all but numbers and dots.
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# Assume simple 1.2.3 style
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$v1 =~ s/[^\d\.]//;
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$v2 =~ s/[^\d\.]//;
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my @a = ( $v1 =~ /(\d+)\.?/g );
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my @b = ( $v2 =~ /(\d+)\.?/g );
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foreach my $n1 (@a) {
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$n1 += 0; #convert to number
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if (!@b) {
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# b ran out of digits, a is larger
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return 1;
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}
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my $n2 = shift @b;
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$n2 += 0; # convert to number
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if ($n1 == $n2) {
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# still tied?, fetch next
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next;
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}
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else {
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# difference! return result
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return $n1 <=> $n2;
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}
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}
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# b still has digits? it's larger, else it's a tie
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return @b ? -1 : 0;
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}
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1;
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}
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# ###########################################################################
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# End VersionCompare package
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# ###########################################################################
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