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| Current File : //lib64/perl5/vendor_perl/File/Spec/OS2.pm |
package File::Spec::OS2;
use strict;
use vars qw(@ISA $VERSION);
require File::Spec::Unix;
$VERSION = '3.40';
$VERSION =~ tr/_//;
@ISA = qw(File::Spec::Unix);
sub devnull {
return "/dev/nul";
}
sub case_tolerant {
return 1;
}
sub file_name_is_absolute {
my ($self,$file) = @_;
return scalar($file =~ m{^([a-z]:)?[\\/]}is);
}
sub path {
my $path = $ENV{PATH};
$path =~ s:\\:/:g;
my @path = split(';',$path);
foreach (@path) { $_ = '.' if $_ eq '' }
return @path;
}
sub _cwd {
# In OS/2 the "require Cwd" is unnecessary bloat.
return Cwd::sys_cwd();
}
my $tmpdir;
sub tmpdir {
return $tmpdir if defined $tmpdir;
my @d = @ENV{qw(TMPDIR TEMP TMP)}; # function call could autovivivy
$tmpdir = $_[0]->_tmpdir( @d, '/tmp', '/' );
}
sub catdir {
my $self = shift;
my @args = @_;
foreach (@args) {
tr[\\][/];
# append a backslash to each argument unless it has one there
$_ .= "/" unless m{/$};
}
return $self->canonpath(join('', @args));
}
sub canonpath {
my ($self,$path) = @_;
return unless defined $path;
$path =~ s/^([a-z]:)/\l$1/s;
$path =~ s|\\|/|g;
$path =~ s|([^/])/+|$1/|g; # xx////xx -> xx/xx
$path =~ s|(/\.)+/|/|g; # xx/././xx -> xx/xx
$path =~ s|^(\./)+(?=[^/])||s; # ./xx -> xx
$path =~ s|/\Z(?!\n)||
unless $path =~ m#^([a-z]:)?/\Z(?!\n)#si;# xx/ -> xx
$path =~ s{^/\.\.$}{/}; # /.. -> /
1 while $path =~ s{^/\.\.}{}; # /../xx -> /xx
return $path;
}
sub splitpath {
my ($self,$path, $nofile) = @_;
my ($volume,$directory,$file) = ('','','');
if ( $nofile ) {
$path =~
m{^( (?:[a-zA-Z]:|(?:\\\\|//)[^\\/]+[\\/][^\\/]+)? )
(.*)
}xs;
$volume = $1;
$directory = $2;
}
else {
$path =~
m{^ ( (?: [a-zA-Z]: |
(?:\\\\|//)[^\\/]+[\\/][^\\/]+
)?
)
( (?:.*[\\\\/](?:\.\.?\Z(?!\n))?)? )
(.*)
}xs;
$volume = $1;
$directory = $2;
$file = $3;
}
return ($volume,$directory,$file);
}
sub splitdir {
my ($self,$directories) = @_ ;
split m|[\\/]|, $directories, -1;
}
sub catpath {
my ($self,$volume,$directory,$file) = @_;
# If it's UNC, make sure the glue separator is there, reusing
# whatever separator is first in the $volume
$volume .= $1
if ( $volume =~ m@^([\\/])[\\/][^\\/]+[\\/][^\\/]+\Z(?!\n)@s &&
$directory =~ m@^[^\\/]@s
) ;
$volume .= $directory ;
# If the volume is not just A:, make sure the glue separator is
# there, reusing whatever separator is first in the $volume if possible.
if ( $volume !~ m@^[a-zA-Z]:\Z(?!\n)@s &&
$volume =~ m@[^\\/]\Z(?!\n)@ &&
$file =~ m@[^\\/]@
) {
$volume =~ m@([\\/])@ ;
my $sep = $1 ? $1 : '/' ;
$volume .= $sep ;
}
$volume .= $file ;
return $volume ;
}
sub abs2rel {
my($self,$path,$base) = @_;
# Clean up $path
if ( ! $self->file_name_is_absolute( $path ) ) {
$path = $self->rel2abs( $path ) ;
} else {
$path = $self->canonpath( $path ) ;
}
# Figure out the effective $base and clean it up.
if ( !defined( $base ) || $base eq '' ) {
$base = $self->_cwd();
} elsif ( ! $self->file_name_is_absolute( $base ) ) {
$base = $self->rel2abs( $base ) ;
} else {
$base = $self->canonpath( $base ) ;
}
# Split up paths
my ( $path_volume, $path_directories, $path_file ) = $self->splitpath( $path, 1 ) ;
my ( $base_volume, $base_directories ) = $self->splitpath( $base, 1 ) ;
return $path unless $path_volume eq $base_volume;
# Now, remove all leading components that are the same
my @pathchunks = $self->splitdir( $path_directories );
my @basechunks = $self->splitdir( $base_directories );
while ( @pathchunks &&
@basechunks &&
lc( $pathchunks[0] ) eq lc( $basechunks[0] )
) {
shift @pathchunks ;
shift @basechunks ;
}
# No need to catdir, we know these are well formed.
$path_directories = CORE::join( '/', @pathchunks );
$base_directories = CORE::join( '/', @basechunks );
# $base_directories now contains the directories the resulting relative
# path must ascend out of before it can descend to $path_directory. So,
# replace all names with $parentDir
#FA Need to replace between backslashes...
$base_directories =~ s|[^\\/]+|..|g ;
# Glue the two together, using a separator if necessary, and preventing an
# empty result.
#FA Must check that new directories are not empty.
if ( $path_directories ne '' && $base_directories ne '' ) {
$path_directories = "$base_directories/$path_directories" ;
} else {
$path_directories = "$base_directories$path_directories" ;
}
return $self->canonpath(
$self->catpath( "", $path_directories, $path_file )
) ;
}
sub rel2abs {
my ($self,$path,$base ) = @_;
if ( ! $self->file_name_is_absolute( $path ) ) {
if ( !defined( $base ) || $base eq '' ) {
$base = $self->_cwd();
}
elsif ( ! $self->file_name_is_absolute( $base ) ) {
$base = $self->rel2abs( $base ) ;
}
else {
$base = $self->canonpath( $base ) ;
}
my ( $path_directories, $path_file ) =
($self->splitpath( $path, 1 ))[1,2] ;
my ( $base_volume, $base_directories ) =
$self->splitpath( $base, 1 ) ;
$path = $self->catpath(
$base_volume,
$self->catdir( $base_directories, $path_directories ),
$path_file
) ;
}
return $self->canonpath( $path ) ;
}
1;
__END__
=head1 NAME
File::Spec::OS2 - methods for OS/2 file specs
=head1 SYNOPSIS
require File::Spec::OS2; # Done internally by File::Spec if needed
=head1 DESCRIPTION
See L<File::Spec> and L<File::Spec::Unix>. This package overrides the
implementation of these methods, not the semantics.
Amongst the changes made for OS/2 are...
=over 4
=item tmpdir
Modifies the list of places temp directory information is looked for.
$ENV{TMPDIR}
$ENV{TEMP}
$ENV{TMP}
/tmp
/
=item splitpath
Volumes can be drive letters or UNC sharenames (\\server\share).
=back
=head1 COPYRIGHT
Copyright (c) 2004 by the Perl 5 Porters. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
=cut