/usr/share/automake-1.14/Automake/Version.pm is in automake 1:1.14.1-2ubuntu1.
This file is owned by root:root, with mode 0o644.
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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 | # Copyright (C) 2001-2013 Free Software Foundation, Inc.
# 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, 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 Automake::Version;
use 5.006;
use strict;
use Automake::ChannelDefs;
=head1 NAME
Automake::Version - version comparison
=head1 SYNOPSIS
use Automake::Version;
print "Version $version is older than required version $required\n"
if Automake::Version::check ($version, $required);
=head1 DESCRIPTION
This module provides support for comparing versions string
as they are used in Automake.
A version is a string that looks like
C<MAJOR.MINOR[.MICRO][ALPHA][-FORK]> where C<MAJOR>, C<MINOR>, and
C<MICRO> are digits, C<ALPHA> is a character, and C<FORK> any
alphanumeric word.
Usually, C<ALPHA> is used to label alpha releases or intermediate
snapshots, C<FORK> is used for git branches or patched releases, and
C<MICRO> is used for bug fixes releases on the C<MAJOR.MINOR> branch.
For the purpose of ordering, C<1.4> is the same as C<1.4.0>, but
C<1.4g> is the same as C<1.4.99g>. The C<FORK> identifier is ignored
in the ordering, except when it looks like C<-pMINOR[ALPHA]>: some
versions were labeled like C<1.4-p3a>, this is the same as an alpha
release labeled C<1.4.3a>. Yes, it's horrible, but Automake did not
support two-dot versions in the past.
=head2 FUNCTIONS
=over 4
=item C<split ($version)>
Split the string C<$version> into the corresponding C<(MAJOR, MINOR,
MICRO, ALPHA, FORK)> tuple. For instance C<'1.4g'> would be split
into C<(1, 4, 99, 'g', '')>. Return C<()> on error.
=cut
sub split ($)
{
my ($ver) = @_;
# Special case for versions like 1.4-p2a.
if ($ver =~ /^(\d+)\.(\d+)(?:-p(\d+)([a-z]+)?)$/)
{
return ($1, $2, $3, $4 || '', '');
}
# Common case.
elsif ($ver =~ /^(\d+)\.(\d+)(?:\.(\d+))?([a-z])?(?:-([A-Za-z0-9]+))?$/)
{
return ($1, $2, $3 || (defined $4 ? 99 : 0), $4 || '', $5 || '');
}
return ();
}
=item C<compare (\@LVERSION, \@RVERSION)>
Compare two version tuples, as returned by C<split>.
Return 1, 0, or -1, if C<LVERSION> is found to be respectively
greater than, equal to, or less than C<RVERSION>.
=cut
sub compare (\@\@)
{
my @l = @{$_[0]};
my @r = @{$_[1]};
for my $i (0, 1, 2)
{
return 1 if ($l[$i] > $r[$i]);
return -1 if ($l[$i] < $r[$i]);
}
for my $i (3, 4)
{
return 1 if ($l[$i] gt $r[$i]);
return -1 if ($l[$i] lt $r[$i]);
}
return 0;
}
=item C<check($VERSION, $REQUIRED)>
Handles the logic of requiring a version number in Automake.
C<$VERSION> should be Automake's version, while C<$REQUIRED>
is the version required by the user input.
Return 0 if the required version is satisfied, 1 otherwise.
=cut
sub check ($$)
{
my ($version, $required) = @_;
my @version = Automake::Version::split ($version);
my @required = Automake::Version::split ($required);
prog_error "version is incorrect: $version"
if $#version == -1;
# This should not happen, because process_option_list and split_version
# use similar regexes.
prog_error "required version is incorrect: $required"
if $#required == -1;
# If we require 3.4n-foo then we require something
# >= 3.4n, with the 'foo' fork identifier.
return 1
if ($required[4] ne '' && $required[4] ne $version[4]);
return 0 > compare (@version, @required);
}
1;
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