=head1 NAME
-Basename - parse file specifications
-
fileparse - split a pathname into pieces
basename - extract just the filename from a path
You select the syntax via the routine fileparse_set_fstype().
If the argument passed to it contains one of the substrings
-"VMS", "MSDOS", or "MacOS", the file specification syntax of that
-operating system is used in future calls to fileparse(),
-basename(), and dirname(). If it contains none of these
-substrings, UNIX syntax is used. This pattern matching is
+"VMS", "MSDOS", "MacOS" or "AmigaOS", the file specification
+syntax of that operating system is used in future calls to
+fileparse(), basename(), and dirname(). If it contains none of
+these substrings, UNIX syntax is used. This pattern matching is
case-insensitive. If you've selected VMS syntax, and the file
specification you pass to one of these routines contains a "/",
they assume you are using UNIX emulation and apply the UNIX syntax
C<@suffixlist>, you can remove file types or versions for examination.
You are guaranteed that if you concatenate B<path>, B<name>, and
-B<suffix> together in that order, the result will be identical to the
-input file specification.
+B<suffix> together in that order, the result will denote the same
+file as the input file specification.
=back
Using UNIX file syntax:
- ($base,$path,$type) = fileparse('/virgil/aeneid/draft.book7',
+ ($base,$path,$type) = fileparse('/virgil/aeneid/draft.book7',
'\.book\d+');
would yield
$base eq 'draft'
- $path eq '/virgil/aeneid',
- $tail eq '.book7'
+ $path eq '/virgil/aeneid/',
+ $type eq '.book7'
Similarly, using VMS syntax:
The dirname() routine returns the directory portion of the input file
specification. When using VMS or MacOS syntax, this is identical to the
second element of the list produced by calling fileparse() with the same
-input file specification. When using UNIX or MSDOS syntax, the return
+input file specification. (Under VMS, if there is no directory information
+in the input file specification, then the current default device and
+directory are returned.) When using UNIX or MSDOS syntax, the return
value conforms to the behavior of the UNIX shell command dirname(1). This
is usually the same as the behavior of fileparse(), but differs in some
cases. For example, for the input file specification F<lib/>, fileparse()
require Exporter;
@ISA = qw(Exporter);
@EXPORT = qw(fileparse fileparse_set_fstype basename dirname);
+#use strict;
+#use vars qw($VERSION $Fileparse_fstype);
+$VERSION = "2.4";
+
# fileparse_set_fstype() - specify OS-based rules used in future
# calls to routines in this package
# fileparse() - parse file specification
#
-# calling sequence:
-# ($filename,$prefix,$tail) = &basename_pat($filespec,@excludelist);
-# where $filespec is the file specification to be parsed, and
-# @excludelist is a list of patterns which should be removed
-# from the end of $filename.
-# $filename is the part of $filespec after $prefix (i.e. the
-# name of the file). The elements of @excludelist
-# are compared to $filename, and if an
-# $prefix is the path portion $filespec, up to and including
-# the end of the last directory name
-# $tail any characters removed from $filename because they
-# matched an element of @excludelist.
-#
-# fileparse() first removes the directory specification from $filespec,
-# according to the syntax of the OS (code is provided below to handle
-# VMS, Unix, MSDOS and MacOS; you can pick the one you want using
-# fileparse_set_fstype(), or you can accept the default, which is
-# based on the information in the builtin variable $^O). It then compares
-# each element of @excludelist to $filename, and if that element is a
-# suffix of $filename, it is removed from $filename and prepended to
-# $tail. By specifying the elements of @excludelist in the right order,
-# you can 'nibble back' $filename to extract the portion of interest
-# to you.
-#
-# For example, on a system running Unix,
-# ($base,$path,$type) = fileparse('/virgil/aeneid/draft.book7',
-# '\.book\d+');
-# would yield $base == 'draft',
-# $path == '/virgil/aeneid/' (note trailing slash)
-# $tail == '.book7'.
-# Similarly, on a system running VMS,
-# ($name,$dir,$type) = fileparse('Doc_Root:[Help]Rhetoric.Rnh','\..*');
-# would yield $name == 'Rhetoric';
-# $dir == 'Doc_Root:[Help]', and
-# $type == '.Rnh'.
-#
-# Version 2.2 13-Oct-1994 Charles Bailey bailey@genetics.upenn.edu
+# Version 2.4 27-Sep-1996 Charles Bailey bailey@genetics.upenn.edu
sub fileparse {
my($fullname,@suffices) = @_;
my($fstype) = $Fileparse_fstype;
- my($dirpath,$tail,$suffix);
+ my($dirpath,$tail,$suffix,$basename);
if ($fstype =~ /^VMS/i) {
if ($fullname =~ m#/#) { $fstype = '' } # We're doing Unix emulation
else {
- ($dirpath,$basename) = ($fullname =~ /(.*[:>\]])?(.*)/);
- $dirpath = $ENV{'DEFAULT'} unless $dirpath;
+ ($dirpath,$basename) = ($fullname =~ /^(.*[:>\]])?(.*)/);
}
}
if ($fstype =~ /^MSDOS/i) {
- ($dirpath,$basename) = ($fullname =~ /(.*\\)?(.*)/);
- $dirpath = '.\\' unless $dirpath;
+ ($dirpath,$basename) = ($fullname =~ /^(.*[:\\\/])?(.*)/);
+ $dirpath .= '.\\' unless $dirpath =~ /[\\\/]$/;
}
- elsif ($fstype =~ /^MAC/i) {
- ($dirpath,$basename) = ($fullname =~ /(.*:)?(.*)/);
+ elsif ($fstype =~ /^MacOS/i) {
+ ($dirpath,$basename) = ($fullname =~ /^(.*:)?(.*)/);
+ }
+ elsif ($fstype =~ /^AmigaOS/i) {
+ ($dirpath,$basename) = ($fullname =~ /(.*[:\/])?(.*)/);
}
elsif ($fstype !~ /^VMS/i) { # default to Unix
- ($dirpath,$basename) = ($fullname =~ m#(.*/)?(.*)#);
+ ($dirpath,$basename) = ($fullname =~ m#^(.*/)?(.*)#);
$dirpath = './' unless $dirpath;
}
if (@suffices) {
$tail = '';
foreach $suffix (@suffices) {
- if ($basename =~ /($suffix)$/) {
- $tail = $1 . $tail;
- $basename = $`;
+ if ($basename =~ /([\x00-\xff]*?)($suffix)$/) {
+ $tail = $2 . $tail;
+ $basename = $1;
}
}
}
my($name) = shift;
(fileparse($name, map("\Q$_\E",@_)))[0];
}
-
+
# dirname() - returns device and directory portion of file specification
# Behavior matches that of Unix dirname(1) exactly for Unix and MSDOS
if ($fstype =~ /VMS/i) {
if ($_[0] =~ m#/#) { $fstype = '' }
- else { return $dirname }
+ else { return $dirname || $ENV{DEFAULT} }
}
if ($fstype =~ /MacOS/i) { return $dirname }
elsif ($fstype =~ /MSDOS/i) {
- if ( $dirname =~ /:\\$/) { return $dirname }
+ $dirname =~ s/([^:])[\\\/]*$/$1/;
+ unless( length($basename) ) {
+ ($basename,$dirname) = fileparse $dirname;
+ $dirname =~ s/([^:])[\\\/]*$/$1/;
+ }
+ }
+ elsif ($fstype =~ /AmigaOS/i) {
+ if ( $dirname =~ /:$/) { return $dirname }
chop $dirname;
- $dirname =~ s:[^\\]+$:: unless $basename;
- $dirname = '.' unless $dirname;
+ $dirname =~ s#[^:/]+$## unless length($basename);
}
else {
- if ( $dirname eq '/') { return $dirname }
- chop $dirname;
- $dirname =~ s:[^/]+$:: unless $basename;
- $dirname = '.' unless $dirname;
+ $dirname =~ s:(.)/*$:$1:;
+ unless( length($basename) ) {
+ local($File::Basename::Fileparse_fstype) = $fstype;
+ ($basename,$dirname) = fileparse $dirname;
+ $dirname =~ s:(.)/*$:$1:;
+ }
}
$dirname;
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