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1 | package CPAN::Version; |
2 | |
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3 | use strict; |
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4 | use vars qw($VERSION); |
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5 | $VERSION = sprintf "%.6f", substr(q$Rev: 844 $,4)/1000000 + 5.4; |
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6 | |
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7 | # CPAN::Version::vcmp courtesy Jost Krieger |
8 | sub vcmp { |
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9 | my($self,$l,$r) = @_; |
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10 | local($^W) = 0; |
11 | CPAN->debug("l[$l] r[$r]") if $CPAN::DEBUG; |
12 | |
13 | return 0 if $l eq $r; # short circuit for quicker success |
14 | |
15 | for ($l,$r) { |
16 | next unless tr/.// > 1; |
17 | s/^v?/v/; |
18 | 1 while s/\.0+(\d)/.$1/; |
19 | } |
20 | if ($l=~/^v/ <=> $r=~/^v/) { |
21 | for ($l,$r) { |
22 | next if /^v/; |
23 | $_ = $self->float2vv($_); |
24 | } |
25 | } |
26 | |
27 | return ( |
28 | ($l ne "undef") <=> ($r ne "undef") || |
29 | ( |
30 | $] >= 5.006 && |
31 | $l =~ /^v/ && |
32 | $r =~ /^v/ && |
33 | $self->vstring($l) cmp $self->vstring($r) |
34 | ) || |
35 | $l <=> $r || |
36 | $l cmp $r |
37 | ); |
38 | } |
39 | |
40 | sub vgt { |
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41 | my($self,$l,$r) = @_; |
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42 | $self->vcmp($l,$r) > 0; |
43 | } |
44 | |
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45 | sub vlt { |
46 | my($self,$l,$r) = @_; |
47 | 0 + ($self->vcmp($l,$r) < 0); |
48 | } |
49 | |
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50 | sub vstring { |
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51 | my($self,$n) = @_; |
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52 | $n =~ s/^v// or die "CPAN::Version::vstring() called with invalid arg [$n]"; |
53 | pack "U*", split /\./, $n; |
54 | } |
55 | |
56 | # vv => visible vstring |
57 | sub float2vv { |
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58 | my($self,$n) = @_; |
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59 | my($rev) = int($n); |
60 | $rev ||= 0; |
61 | my($mantissa) = $n =~ /\.(\d{1,12})/; # limit to 12 digits to limit |
62 | # architecture influence |
63 | $mantissa ||= 0; |
64 | $mantissa .= "0" while length($mantissa)%3; |
65 | my $ret = "v" . $rev; |
66 | while ($mantissa) { |
67 | $mantissa =~ s/(\d{1,3})// or |
68 | die "Panic: length>0 but not a digit? mantissa[$mantissa]"; |
69 | $ret .= ".".int($1); |
70 | } |
71 | # warn "n[$n]ret[$ret]"; |
72 | $ret; |
73 | } |
74 | |
75 | sub readable { |
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76 | my($self,$n) = @_; |
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77 | $n =~ /^([\w\-\+\.]+)/; |
78 | |
79 | return $1 if defined $1 && length($1)>0; |
80 | # if the first user reaches version v43, he will be treated as "+". |
81 | # We'll have to decide about a new rule here then, depending on what |
82 | # will be the prevailing versioning behavior then. |
83 | |
84 | if ($] < 5.006) { # or whenever v-strings were introduced |
85 | # we get them wrong anyway, whatever we do, because 5.005 will |
86 | # have already interpreted 0.2.4 to be "0.24". So even if he |
87 | # indexer sends us something like "v0.2.4" we compare wrongly. |
88 | |
89 | # And if they say v1.2, then the old perl takes it as "v12" |
90 | |
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91 | if (defined $CPAN::Frontend) { |
92 | $CPAN::Frontend->mywarn("Suspicious version string seen [$n]\n"); |
93 | } else { |
94 | warn("Suspicious version string seen [$n]\n"); |
95 | } |
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96 | return $n; |
97 | } |
98 | my $better = sprintf "v%vd", $n; |
99 | CPAN->debug("n[$n] better[$better]") if $CPAN::DEBUG; |
100 | return $better; |
101 | } |
102 | |
103 | 1; |
104 | |
105 | __END__ |
106 | |
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107 | =head1 NAME |
108 | |
109 | CPAN::Version - utility functions to compare CPAN versions |
110 | |
111 | =head1 SYNOPSIS |
112 | |
113 | use CPAN::Version; |
114 | |
115 | CPAN::Version->vgt("1.1","1.1.1"); # 1 bc. 1.1 > 1.001001 |
116 | |
117 | CPAN::Version->vlt("1.1","1.1"); # 0 bc. 1.1 not < 1.1 |
118 | |
119 | CPAN::Version->vcmp("1.1","1.1.1"); # 1 bc. first is larger |
120 | |
121 | CPAN::Version->vcmp("1.1.1","1.1"); # -1 bc. first is smaller |
122 | |
123 | CPAN::Version->readable(v1.2.3); # "v1.2.3" |
124 | |
125 | CPAN::Version->vstring("v1.2.3"); # v1.2.3 |
126 | |
127 | CPAN::Version->float2vv(1.002003); # "v1.2.3" |
128 | |
129 | =head1 DESCRIPTION |
130 | |
131 | This module mediates between some version that perl sees in a package |
132 | and the version that is published by the CPAN indexer. |
133 | |
134 | It's only written as a helper module for both CPAN.pm and CPANPLUS.pm. |
135 | |
136 | As it stands it predates version.pm but has the same goal: make |
137 | version strings visible and comparable. |
138 | |
139 | =head1 LICENSE |
140 | |
141 | This program is free software; you can redistribute it and/or |
142 | modify it under the same terms as Perl itself. |
143 | |
144 | =cut |
145 | |
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146 | # Local Variables: |
147 | # mode: cperl |
148 | # cperl-indent-level: 2 |
149 | # End: |