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920dae64 AT |
1 | package File::Spec::OS2; |
2 | ||
3 | use strict; | |
4 | use vars qw(@ISA $VERSION); | |
5 | require File::Spec::Unix; | |
6 | ||
7 | $VERSION = '1.2'; | |
8 | ||
9 | @ISA = qw(File::Spec::Unix); | |
10 | ||
11 | sub devnull { | |
12 | return "/dev/nul"; | |
13 | } | |
14 | ||
15 | sub case_tolerant { | |
16 | return 1; | |
17 | } | |
18 | ||
19 | sub file_name_is_absolute { | |
20 | my ($self,$file) = @_; | |
21 | return scalar($file =~ m{^([a-z]:)?[\\/]}is); | |
22 | } | |
23 | ||
24 | sub path { | |
25 | my $path = $ENV{PATH}; | |
26 | $path =~ s:\\:/:g; | |
27 | my @path = split(';',$path); | |
28 | foreach (@path) { $_ = '.' if $_ eq '' } | |
29 | return @path; | |
30 | } | |
31 | ||
32 | sub _cwd { | |
33 | # In OS/2 the "require Cwd" is unnecessary bloat. | |
34 | return Cwd::sys_cwd(); | |
35 | } | |
36 | ||
37 | my $tmpdir; | |
38 | sub tmpdir { | |
39 | return $tmpdir if defined $tmpdir; | |
40 | $tmpdir = $_[0]->_tmpdir( @ENV{qw(TMPDIR TEMP TMP)}, | |
41 | '/tmp', | |
42 | '/' ); | |
43 | } | |
44 | ||
45 | sub catdir { | |
46 | my $self = shift; | |
47 | my @args = @_; | |
48 | foreach (@args) { | |
49 | tr[\\][/]; | |
50 | # append a backslash to each argument unless it has one there | |
51 | $_ .= "/" unless m{/$}; | |
52 | } | |
53 | return $self->canonpath(join('', @args)); | |
54 | } | |
55 | ||
56 | sub canonpath { | |
57 | my ($self,$path) = @_; | |
58 | $path =~ s/^([a-z]:)/\l$1/s; | |
59 | $path =~ s|\\|/|g; | |
60 | $path =~ s|([^/])/+|$1/|g; # xx////xx -> xx/xx | |
61 | $path =~ s|(/\.)+/|/|g; # xx/././xx -> xx/xx | |
62 | $path =~ s|^(\./)+(?=[^/])||s; # ./xx -> xx | |
63 | $path =~ s|/\Z(?!\n)|| | |
64 | unless $path =~ m#^([a-z]:)?/\Z(?!\n)#si;# xx/ -> xx | |
65 | $path =~ s{^/\.\.$}{/}; # /.. -> / | |
66 | 1 while $path =~ s{^/\.\.}{}; # /../xx -> /xx | |
67 | return $path; | |
68 | } | |
69 | ||
70 | ||
71 | sub splitpath { | |
72 | my ($self,$path, $nofile) = @_; | |
73 | my ($volume,$directory,$file) = ('','',''); | |
74 | if ( $nofile ) { | |
75 | $path =~ | |
76 | m{^( (?:[a-zA-Z]:|(?:\\\\|//)[^\\/]+[\\/][^\\/]+)? ) | |
77 | (.*) | |
78 | }xs; | |
79 | $volume = $1; | |
80 | $directory = $2; | |
81 | } | |
82 | else { | |
83 | $path =~ | |
84 | m{^ ( (?: [a-zA-Z]: | | |
85 | (?:\\\\|//)[^\\/]+[\\/][^\\/]+ | |
86 | )? | |
87 | ) | |
88 | ( (?:.*[\\\\/](?:\.\.?\Z(?!\n))?)? ) | |
89 | (.*) | |
90 | }xs; | |
91 | $volume = $1; | |
92 | $directory = $2; | |
93 | $file = $3; | |
94 | } | |
95 | ||
96 | return ($volume,$directory,$file); | |
97 | } | |
98 | ||
99 | ||
100 | sub splitdir { | |
101 | my ($self,$directories) = @_ ; | |
102 | split m|[\\/]|, $directories, -1; | |
103 | } | |
104 | ||
105 | ||
106 | sub catpath { | |
107 | my ($self,$volume,$directory,$file) = @_; | |
108 | ||
109 | # If it's UNC, make sure the glue separator is there, reusing | |
110 | # whatever separator is first in the $volume | |
111 | $volume .= $1 | |
112 | if ( $volume =~ m@^([\\/])[\\/][^\\/]+[\\/][^\\/]+\Z(?!\n)@s && | |
113 | $directory =~ m@^[^\\/]@s | |
114 | ) ; | |
115 | ||
116 | $volume .= $directory ; | |
117 | ||
118 | # If the volume is not just A:, make sure the glue separator is | |
119 | # there, reusing whatever separator is first in the $volume if possible. | |
120 | if ( $volume !~ m@^[a-zA-Z]:\Z(?!\n)@s && | |
121 | $volume =~ m@[^\\/]\Z(?!\n)@ && | |
122 | $file =~ m@[^\\/]@ | |
123 | ) { | |
124 | $volume =~ m@([\\/])@ ; | |
125 | my $sep = $1 ? $1 : '/' ; | |
126 | $volume .= $sep ; | |
127 | } | |
128 | ||
129 | $volume .= $file ; | |
130 | ||
131 | return $volume ; | |
132 | } | |
133 | ||
134 | ||
135 | sub abs2rel { | |
136 | my($self,$path,$base) = @_; | |
137 | ||
138 | # Clean up $path | |
139 | if ( ! $self->file_name_is_absolute( $path ) ) { | |
140 | $path = $self->rel2abs( $path ) ; | |
141 | } else { | |
142 | $path = $self->canonpath( $path ) ; | |
143 | } | |
144 | ||
145 | # Figure out the effective $base and clean it up. | |
146 | if ( !defined( $base ) || $base eq '' ) { | |
147 | $base = $self->_cwd(); | |
148 | } elsif ( ! $self->file_name_is_absolute( $base ) ) { | |
149 | $base = $self->rel2abs( $base ) ; | |
150 | } else { | |
151 | $base = $self->canonpath( $base ) ; | |
152 | } | |
153 | ||
154 | # Split up paths | |
155 | my ( $path_volume, $path_directories, $path_file ) = $self->splitpath( $path, 1 ) ; | |
156 | my ( $base_volume, $base_directories ) = $self->splitpath( $base, 1 ) ; | |
157 | return $path unless $path_volume eq $base_volume; | |
158 | ||
159 | # Now, remove all leading components that are the same | |
160 | my @pathchunks = $self->splitdir( $path_directories ); | |
161 | my @basechunks = $self->splitdir( $base_directories ); | |
162 | ||
163 | while ( @pathchunks && | |
164 | @basechunks && | |
165 | lc( $pathchunks[0] ) eq lc( $basechunks[0] ) | |
166 | ) { | |
167 | shift @pathchunks ; | |
168 | shift @basechunks ; | |
169 | } | |
170 | ||
171 | # No need to catdir, we know these are well formed. | |
172 | $path_directories = CORE::join( '/', @pathchunks ); | |
173 | $base_directories = CORE::join( '/', @basechunks ); | |
174 | ||
175 | # $base_directories now contains the directories the resulting relative | |
176 | # path must ascend out of before it can descend to $path_directory. So, | |
177 | # replace all names with $parentDir | |
178 | ||
179 | #FA Need to replace between backslashes... | |
180 | $base_directories =~ s|[^\\/]+|..|g ; | |
181 | ||
182 | # Glue the two together, using a separator if necessary, and preventing an | |
183 | # empty result. | |
184 | ||
185 | #FA Must check that new directories are not empty. | |
186 | if ( $path_directories ne '' && $base_directories ne '' ) { | |
187 | $path_directories = "$base_directories/$path_directories" ; | |
188 | } else { | |
189 | $path_directories = "$base_directories$path_directories" ; | |
190 | } | |
191 | ||
192 | return $self->canonpath( | |
193 | $self->catpath( "", $path_directories, $path_file ) | |
194 | ) ; | |
195 | } | |
196 | ||
197 | ||
198 | sub rel2abs { | |
199 | my ($self,$path,$base ) = @_; | |
200 | ||
201 | if ( ! $self->file_name_is_absolute( $path ) ) { | |
202 | ||
203 | if ( !defined( $base ) || $base eq '' ) { | |
204 | $base = $self->_cwd(); | |
205 | } | |
206 | elsif ( ! $self->file_name_is_absolute( $base ) ) { | |
207 | $base = $self->rel2abs( $base ) ; | |
208 | } | |
209 | else { | |
210 | $base = $self->canonpath( $base ) ; | |
211 | } | |
212 | ||
213 | my ( $path_directories, $path_file ) = | |
214 | ($self->splitpath( $path, 1 ))[1,2] ; | |
215 | ||
216 | my ( $base_volume, $base_directories ) = | |
217 | $self->splitpath( $base, 1 ) ; | |
218 | ||
219 | $path = $self->catpath( | |
220 | $base_volume, | |
221 | $self->catdir( $base_directories, $path_directories ), | |
222 | $path_file | |
223 | ) ; | |
224 | } | |
225 | ||
226 | return $self->canonpath( $path ) ; | |
227 | } | |
228 | ||
229 | 1; | |
230 | __END__ | |
231 | ||
232 | =head1 NAME | |
233 | ||
234 | File::Spec::OS2 - methods for OS/2 file specs | |
235 | ||
236 | =head1 SYNOPSIS | |
237 | ||
238 | require File::Spec::OS2; # Done internally by File::Spec if needed | |
239 | ||
240 | =head1 DESCRIPTION | |
241 | ||
242 | See L<File::Spec> and L<File::Spec::Unix>. This package overrides the | |
243 | implementation of these methods, not the semantics. | |
244 | ||
245 | Amongst the changes made for OS/2 are... | |
246 | ||
247 | =over 4 | |
248 | ||
249 | =item tmpdir | |
250 | ||
251 | Modifies the list of places temp directory information is looked for. | |
252 | ||
253 | $ENV{TMPDIR} | |
254 | $ENV{TEMP} | |
255 | $ENV{TMP} | |
256 | /tmp | |
257 | / | |
258 | ||
259 | =item splitpath | |
260 | ||
261 | Volumes can be drive letters or UNC sharenames (\\server\share). | |
262 | ||
263 | =back | |
264 | ||
265 | =head1 COPYRIGHT | |
266 | ||
267 | Copyright (c) 2004 by the Perl 5 Porters. All rights reserved. | |
268 | ||
269 | This program is free software; you can redistribute it and/or modify | |
270 | it under the same terms as Perl itself. | |
271 | ||
272 | =cut |