source: main/trunk/greenstone2/perllib/cpan/URI/file/Mac.pm@ 27174

package URI::file::Mac;

require URI::file::Base;
@ISA=qw(URI::file::Base);

use strict;
use URI::Escape qw(uri_unescape);



sub _file_extract_path
{
    my $class = shift;
    my $path = shift;

    my @pre;
    if ($path =~ s/^(:+)//) {
    if (length($1) == 1) {
        @pre = (".") unless length($path);
    } else {
        @pre = ("..") x (length($1) - 1);
    }
    } else { #absolute
    $pre[0] = "";
    }

    my $isdir = ($path =~ s/:$//);
    $path =~ s,([%/;]), URI::Escape::escape_char($1),eg;

    my @path = split(/:/, $path, -1);
    for (@path) {
    if ($_ eq "." || $_ eq "..") {
        $_ = "%2E" x length($_);
    }
    $_ = ".." unless length($_);
    }
    push (@path,"") if $isdir;
    (join("/", @pre, @path), 1);
}


sub file
{
    my $class = shift;
    my $uri = shift;
    my @path;

    my $auth = $uri->authority;
    if (defined $auth) {
    if (lc($auth) ne "localhost" && $auth ne "") {
        my $u_auth = uri_unescape($auth);
        if (!$class->_file_is_localhost($u_auth)) {
        # some other host (use it as volume name)
        @path = ("", $auth);
        # XXX or just return to make it illegal;
        }
    }
    }
    my @ps = split("/", $uri->path, -1);
    shift @ps if @path;
    push(@path, @ps);

    my $pre = "";
    if (!@path) {
    return;  # empty path; XXX return ":" instead?
    } elsif ($path[0] eq "") {
    # absolute
    shift(@path);
    if (@path == 1) {
        return if $path[0] eq "";  # not root directory
        push(@path, "");           # volume only, effectively append ":"
    }
    @ps = @path;
    @path = ();
        my $part;
    for (@ps) {  #fix up "." and "..", including interior, in relatives
        next if $_ eq ".";
        $part = $_ eq ".." ? "" : $_;
        push(@path,$part);
    }
    if ($ps[-1] eq "..") {  #if this happens, we need another :
        push(@path,"");
    }
    
    } else {
    $pre = ":";
    @ps = @path;
    @path = ();
        my $part;
    for (@ps) {  #fix up "." and "..", including interior, in relatives
        next if $_ eq ".";
        $part = $_ eq ".." ? "" : $_;
        push(@path,$part);
    }
    if ($ps[-1] eq "..") {  #if this happens, we need another :
        push(@path,"");
    }
    
    }
    return unless $pre || @path;
    for (@path) {
    s/;.*//;  # get rid of parameters
    #return unless length; # XXX
    $_ = uri_unescape($_);
    return if /\0/;
    return if /:/;  # Should we?
    }
    $pre . join(":", @path);
}

sub dir
{
    my $class = shift;
    my $path = $class->file(@_);
    return unless defined $path;
    $path .= ":" unless $path =~ /:$/;
    $path;
}

1;