source: trunk/essentials/dev-lang/perl/lib/File/Basename.pm@ 3299

=head1 NAME

File::Basename - Parse file paths into directory, filename and suffix.

=head1 SYNOPSIS

    use File::Basename;

    ($name,$path,$suffix) = fileparse($fullname,@suffixlist);
    $name = fileparse($fullname,@suffixlist);

    $basename = basename($fullname,@suffixlist);
    $dirname  = dirname($fullname);


=head1 DESCRIPTION

These routines allow you to parse file paths into their directory, filename
and suffix.

B<NOTE>: C<dirname()> and C<basename()> emulate the behaviours, and
quirks, of the shell and C functions of the same name.  See each
function's documentation for details.  If your concern is just parsing
paths it is safer to use L<File::Spec>'s C<splitpath()> and
C<splitdir()> methods.

It is guaranteed that

    # Where $path_separator is / for Unix, \ for Windows, etc...
    dirname($path) . $path_separator . basename($path);

is equivalent to the original path for all systems but VMS.


=cut


package File::Basename;

# A bit of juggling to insure that C<use re 'taint';> always works, since
# File::Basename is used during the Perl build, when the re extension may
# not be available.
BEGIN {
  unless (eval { require re; })
    { eval ' sub re::import { $^H |= 0x00100000; } ' } # HINT_RE_TAINT
  import re 'taint';
}


use strict;
use 5.006;
use warnings;
our(@ISA, @EXPORT, $VERSION, $Fileparse_fstype, $Fileparse_igncase);
require Exporter;
@ISA = qw(Exporter);
@EXPORT = qw(fileparse fileparse_set_fstype basename dirname);
$VERSION = "2.74";

fileparse_set_fstype($^O);


=over 4

=item C<fileparse>

    my($filename, $directories, $suffix) = fileparse($path);
    my($filename, $directories, $suffix) = fileparse($path, @suffixes);
    my $filename                         = fileparse($path, @suffixes);

The C<fileparse()> routine divides a file path into its $directories, $filename
and (optionally) the filename $suffix.

$directories contains everything up to and including the last
directory separator in the $path including the volume (if applicable).
The remainder of the $path is the $filename.

     # On Unix returns ("baz", "/foo/bar/", "")
     fileparse("/foo/bar/baz");

     # On Windows returns ("baz", "C:\foo\bar\", "")
     fileparse("C:\foo\bar\baz");

     # On Unix returns ("", "/foo/bar/baz/", "")
     fileparse("/foo/bar/baz/");

If @suffixes are given each element is a pattern (either a string or a
C<qr//>) matched against the end of the $filename.  The matching
portion is removed and becomes the $suffix.