Commit | Line | Data |
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c8d69e4a | 1 | #!perl -w |
a7ad731c HS |
2 | package version; |
3 | ||
c8a14fb6 | 4 | use 5.005_04; |
a7ad731c HS |
5 | use strict; |
6 | ||
91152fc1 | 7 | use vars qw(@ISA $VERSION $CLASS $STRICT $LAX *declare *qv); |
a7ad731c | 8 | |
a8fb8d79 | 9 | $VERSION = 0.88; |
a7ad731c HS |
10 | |
11 | $CLASS = 'version'; | |
12 | ||
91152fc1 DG |
13 | #--------------------------------------------------------------------------# |
14 | # Version regexp components | |
15 | #--------------------------------------------------------------------------# | |
16 | ||
17 | # Fraction part of a decimal version number. This is a common part of | |
18 | # both strict and lax decimal versions | |
19 | ||
20 | my $FRACTION_PART = qr/\.[0-9]+/; | |
21 | ||
22 | # First part of either decimal or dotted-decimal strict version number. | |
23 | # Unsigned integer with no leading zeroes (except for zero itself) to | |
24 | # avoid confusion with octal. | |
25 | ||
26 | my $STRICT_INTEGER_PART = qr/0|[1-9][0-9]*/; | |
27 | ||
28 | # First part of either decimal or dotted-decimal lax version number. | |
29 | # Unsigned integer, but allowing leading zeros. Always interpreted | |
30 | # as decimal. However, some forms of the resulting syntax give odd | |
31 | # results if used as ordinary Perl expressions, due to how perl treats | |
32 | # octals. E.g. | |
33 | # version->new("010" ) == 10 | |
34 | # version->new( 010 ) == 8 | |
35 | # version->new( 010.2) == 82 # "8" . "2" | |
36 | ||
37 | my $LAX_INTEGER_PART = qr/[0-9]+/; | |
38 | ||
39 | # Second and subsequent part of a strict dotted-decimal version number. | |
40 | # Leading zeroes are permitted, and the number is always decimal. | |
41 | # Limited to three digits to avoid overflow when converting to decimal | |
42 | # form and also avoid problematic style with excessive leading zeroes. | |
43 | ||
44 | my $STRICT_DOTTED_DECIMAL_PART = qr/\.[0-9]{1,3}/; | |
45 | ||
46 | # Second and subsequent part of a lax dotted-decimal version number. | |
47 | # Leading zeroes are permitted, and the number is always decimal. No | |
48 | # limit on the numerical value or number of digits, so there is the | |
49 | # possibility of overflow when converting to decimal form. | |
50 | ||
51 | my $LAX_DOTTED_DECIMAL_PART = qr/\.[0-9]+/; | |
52 | ||
53 | # Alpha suffix part of lax version number syntax. Acts like a | |
54 | # dotted-decimal part. | |
55 | ||
56 | my $LAX_ALPHA_PART = qr/_[0-9]+/; | |
57 | ||
58 | #--------------------------------------------------------------------------# | |
59 | # Strict version regexp definitions | |
60 | #--------------------------------------------------------------------------# | |
61 | ||
62 | # Strict decimal version number. | |
63 | ||
64 | my $STRICT_DECIMAL_VERSION = | |
65 | qr/ $STRICT_INTEGER_PART $FRACTION_PART? /x; | |
66 | ||
67 | # Strict dotted-decimal version number. Must have both leading "v" and | |
68 | # at least three parts, to avoid confusion with decimal syntax. | |
69 | ||
70 | my $STRICT_DOTTED_DECIMAL_VERSION = | |
71 | qr/ v $STRICT_INTEGER_PART $STRICT_DOTTED_DECIMAL_PART{2,} /x; | |
72 | ||
73 | # Complete strict version number syntax -- should generally be used | |
74 | # anchored: qr/ \A $STRICT \z /x | |
75 | ||
76 | $STRICT = | |
77 | qr/ $STRICT_DECIMAL_VERSION | $STRICT_DOTTED_DECIMAL_VERSION /x; | |
78 | ||
79 | #--------------------------------------------------------------------------# | |
80 | # Lax version regexp definitions | |
81 | #--------------------------------------------------------------------------# | |
82 | ||
83 | # Lax decimal version number. Just like the strict one except for | |
84 | # allowing an alpha suffix or allowing a leading or trailing | |
85 | # decimal-point | |
86 | ||
87 | my $LAX_DECIMAL_VERSION = | |
88 | qr/ $LAX_INTEGER_PART (?: \. | $FRACTION_PART $LAX_ALPHA_PART? )? | |
89 | | | |
90 | $FRACTION_PART $LAX_ALPHA_PART? | |
91 | /x; | |
92 | ||
93 | # Lax dotted-decimal version number. Distinguished by having either | |
94 | # leading "v" or at least three non-alpha parts. Alpha part is only | |
95 | # permitted if there are at least two non-alpha parts. Strangely | |
96 | # enough, without the leading "v", Perl takes .1.2 to mean v0.1.2, | |
97 | # so when there is no "v", the leading part is optional | |
98 | ||
99 | my $LAX_DOTTED_DECIMAL_VERSION = | |
100 | qr/ | |
101 | v $LAX_INTEGER_PART (?: $LAX_DOTTED_DECIMAL_PART+ $LAX_ALPHA_PART? )? | |
102 | | | |
103 | $LAX_INTEGER_PART? $LAX_DOTTED_DECIMAL_PART{2,} $LAX_ALPHA_PART? | |
104 | /x; | |
105 | ||
106 | # Complete lax version number syntax -- should generally be used | |
107 | # anchored: qr/ \A $LAX \z /x | |
108 | # | |
109 | # The string 'undef' is a special case to make for easier handling | |
110 | # of return values from ExtUtils::MM->parse_version | |
111 | ||
112 | $LAX = | |
113 | qr/ undef | $LAX_DECIMAL_VERSION | $LAX_DOTTED_DECIMAL_VERSION /x; | |
114 | ||
115 | #--------------------------------------------------------------------------# | |
116 | ||
a7ad731c | 117 | # Preloaded methods go here. |
c8a14fb6 | 118 | sub import { |
c8a14fb6 | 119 | no strict 'refs'; |
f941e658 JP |
120 | my ($class) = shift; |
121 | ||
122 | # Set up any derived class | |
123 | unless ($class eq 'version') { | |
124 | local $^W; | |
125 | *{$class.'::declare'} = \&version::declare; | |
126 | *{$class.'::qv'} = \&version::qv; | |
127 | } | |
128 | ||
129 | my %args; | |
130 | if (@_) { # any remaining terms are arguments | |
131 | map { $args{$_} = 1 } @_ | |
132 | } | |
133 | else { # no parameters at all on use line | |
134 | %args = | |
135 | ( | |
136 | qv => 1, | |
137 | 'UNIVERSAL::VERSION' => 1, | |
138 | ); | |
139 | } | |
91152fc1 | 140 | |
f941e658 JP |
141 | my $callpkg = caller(); |
142 | ||
143 | if (exists($args{declare})) { | |
61a0cb1c | 144 | *{$callpkg.'::declare'} = |
f941e658 JP |
145 | sub {return $class->declare(shift) } |
146 | unless defined(&{$callpkg.'::declare'}); | |
147 | } | |
148 | ||
149 | if (exists($args{qv})) { | |
61a0cb1c | 150 | *{$callpkg.'::qv'} = |
f941e658 | 151 | sub {return $class->qv(shift) } |
61a0cb1c | 152 | unless defined(&{$callpkg.'::qv'}); |
f941e658 | 153 | } |
c0b17f21 | 154 | |
f941e658 | 155 | if (exists($args{'VERSION'})) { |
61a0cb1c JP |
156 | *{$callpkg.'::VERSION'} = \&version::_VERSION; |
157 | } | |
158 | ||
159 | if (exists($args{'is_strict'})) { | |
d54f8cf7 JP |
160 | *{$callpkg.'::is_strict'} = \&version::is_strict |
161 | unless defined(&{$callpkg.'::is_strict'}); | |
61a0cb1c JP |
162 | } |
163 | ||
164 | if (exists($args{'is_lax'})) { | |
d54f8cf7 JP |
165 | *{$callpkg.'::is_lax'} = \&version::is_lax |
166 | unless defined(&{$callpkg.'::is_lax'}); | |
f941e658 | 167 | } |
c8a14fb6 | 168 | } |
a7ad731c | 169 | |
91152fc1 DG |
170 | sub is_strict { defined $_[0] && $_[0] =~ qr/ \A $STRICT \z /x } |
171 | sub is_lax { defined $_[0] && $_[0] =~ qr/ \A $LAX \z /x } | |
172 | ||
a7ad731c | 173 | 1; |