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- package CPAN::Version;
-
- use strict;
- use vars qw($VERSION);
- $VERSION = "5.5";
-
- # CPAN::Version::vcmp courtesy Jost Krieger
- sub vcmp {
- my($self,$l,$r) = @_;
- local($^W) = 0;
- CPAN->debug("l[$l] r[$r]") if $CPAN::DEBUG;
-
- return 0 if $l eq $r; # short circuit for quicker success
-
- for ($l,$r) {
- s/_//g;
- }
- CPAN->debug("l[$l] r[$r]") if $CPAN::DEBUG;
- for ($l,$r) {
- next unless tr/.// > 1 || /^v/;
- s/^v?/v/;
- 1 while s/\.0+(\d)/.$1/; # remove leading zeroes per group
- }
- CPAN->debug("l[$l] r[$r]") if $CPAN::DEBUG;
- if ($l=~/^v/ <=> $r=~/^v/) {
- for ($l,$r) {
- next if /^v/;
- $_ = $self->float2vv($_);
- }
- }
- CPAN->debug("l[$l] r[$r]") if $CPAN::DEBUG;
- my $lvstring = "v0";
- my $rvstring = "v0";
- if ($] >= 5.006
- && $l =~ /^v/
- && $r =~ /^v/) {
- $lvstring = $self->vstring($l);
- $rvstring = $self->vstring($r);
- CPAN->debug(sprintf "lv[%vd] rv[%vd]", $lvstring, $rvstring) if $CPAN::DEBUG;
- }
-
- return (
- ($l ne "undef") <=> ($r ne "undef")
- ||
- $lvstring cmp $rvstring
- ||
- $l <=> $r
- ||
- $l cmp $r
- );
- }
-
- sub vgt {
- my($self,$l,$r) = @_;
- $self->vcmp($l,$r) > 0;
- }
-
- sub vlt {
- my($self,$l,$r) = @_;
- 0 + ($self->vcmp($l,$r) < 0);
- }
-
- sub vge {
- my($self,$l,$r) = @_;
- $self->vcmp($l,$r) >= 0;
- }
-
- sub vle {
- my($self,$l,$r) = @_;
- 0 + ($self->vcmp($l,$r) <= 0);
- }
-
- sub vstring {
- my($self,$n) = @_;
- $n =~ s/^v// or die "CPAN::Version::vstring() called with invalid arg [$n]";
- pack "U*", split /\./, $n;
- }
-
- # vv => visible vstring
- sub float2vv {
- my($self,$n) = @_;
- my($rev) = int($n);
- $rev ||= 0;
- my($mantissa) = $n =~ /\.(\d{1,12})/; # limit to 12 digits to limit
- # architecture influence
- $mantissa ||= 0;
- $mantissa .= "0" while length($mantissa)%3;
- my $ret = "v" . $rev;
- while ($mantissa) {
- $mantissa =~ s/(\d{1,3})// or
- die "Panic: length>0 but not a digit? mantissa[$mantissa]";
- $ret .= ".".int($1);
- }
- # warn "n[$n]ret[$ret]";
- $ret =~ s/(\.0)+/.0/; # v1.0.0 => v1.0
- $ret;
- }
-
- sub readable {
- my($self,$n) = @_;
- $n =~ /^([\w\-\+\.]+)/;
-
- return $1 if defined $1 && length($1)>0;
- # if the first user reaches version v43, he will be treated as "+".
- # We'll have to decide about a new rule here then, depending on what
- # will be the prevailing versioning behavior then.
-
- if ($] < 5.006) { # or whenever v-strings were introduced
- # we get them wrong anyway, whatever we do, because 5.005 will
- # have already interpreted 0.2.4 to be "0.24". So even if he
- # indexer sends us something like "v0.2.4" we compare wrongly.
-
- # And if they say v1.2, then the old perl takes it as "v12"
-
- if (defined $CPAN::Frontend) {
- $CPAN::Frontend->mywarn("Suspicious version string seen [$n]\n");
- } else {
- warn("Suspicious version string seen [$n]\n");
- }
- return $n;
- }
- my $better = sprintf "v%vd", $n;
- CPAN->debug("n[$n] better[$better]") if $CPAN::DEBUG;
- return $better;
- }
-
- 1;
-
- __END__
-
- =head1 NAME
-
- CPAN::Version - utility functions to compare CPAN versions
-
- =head1 SYNOPSIS
-
- use CPAN::Version;
-
- CPAN::Version->vgt("1.1","1.1.1"); # 1 bc. 1.1 > 1.001001
-
- CPAN::Version->vlt("1.1","1.1"); # 0 bc. 1.1 not < 1.1
-
- CPAN::Version->vcmp("1.1","1.1.1"); # 1 bc. first is larger
-
- CPAN::Version->vcmp("1.1.1","1.1"); # -1 bc. first is smaller
-
- CPAN::Version->readable(v1.2.3); # "v1.2.3"
-
- CPAN::Version->vstring("v1.2.3"); # v1.2.3
-
- CPAN::Version->float2vv(1.002003); # "v1.2.3"
-
- =head1 DESCRIPTION
-
- This module mediates between some version that perl sees in a package
- and the version that is published by the CPAN indexer.
-
- It's only written as a helper module for both CPAN.pm and CPANPLUS.pm.
-
- As it stands it predates version.pm but has the same goal: make
- version strings visible and comparable.
-
- =head1 LICENSE
-
- This program is free software; you can redistribute it and/or
- modify it under the same terms as Perl itself.
-
- =cut
-
- # Local Variables:
- # mode: cperl
- # cperl-indent-level: 4
- # End:
-