package File::Basename;
-require 5.000;
-use Config;
+=head1 NAME
+
+fileparse - split a pathname into pieces
+
+basename - extract just the filename from a path
+
+dirname - extract just the directory from a path
+
+=head1 SYNOPSIS
+
+ use File::Basename;
+
+ ($name,$path,$suffix) = fileparse($fullname,@suffixlist);
+ $name = fileparse($fullname,@suffixlist);
+ fileparse_set_fstype($os_string);
+ $basename = basename($fullname,@suffixlist);
+ $dirname = dirname($fullname);
+
+ ($name,$path,$suffix) = fileparse("lib/File/Basename.pm",qr{\.pm});
+ fileparse_set_fstype("VMS");
+ $basename = basename("lib/File/Basename.pm",".pm");
+ $dirname = dirname("lib/File/Basename.pm");
+
+=head1 DESCRIPTION
+
+These routines allow you to parse file specifications into useful
+pieces using the syntax of different operating systems.
+
+=over 4
+
+=item fileparse_set_fstype
+
+You select the syntax via the routine fileparse_set_fstype().
+
+If the argument passed to it contains one of the substrings
+"VMS", "MSDOS", "MacOS", "AmigaOS" or "MSWin32", the file specification
+syntax of that operating system is used in future calls to
+fileparse(), basename(), and dirname(). If it contains none of
+these substrings, Unix syntax is used. This pattern matching is
+case-insensitive. If you've selected VMS syntax, and the file
+specification you pass to one of these routines contains a "/",
+they assume you are using Unix emulation and apply the Unix syntax
+rules instead, for that function call only.
+
+If the argument passed to it contains one of the substrings "VMS",
+"MSDOS", "MacOS", "AmigaOS", "os2", "MSWin32" or "RISCOS", then the pattern
+matching for suffix removal is performed without regard for case,
+since those systems are not case-sensitive when opening existing files
+(though some of them preserve case on file creation).
+
+If you haven't called fileparse_set_fstype(), the syntax is chosen
+by examining the builtin variable C<$^O> according to these rules.
+
+=item fileparse
+
+The fileparse() routine divides a file specification into three
+parts: a leading B<path>, a file B<name>, and a B<suffix>. The
+B<path> contains everything up to and including the last directory
+separator in the input file specification. The remainder of the input
+file specification is then divided into B<name> and B<suffix> based on
+the optional patterns you specify in C<@suffixlist>. Each element of
+this list can be a qr-quoted pattern (or a string which is interpreted
+as a regular expression), and is matched
+against the end of B<name>. If this succeeds, the matching portion of
+B<name> is removed and prepended to B<suffix>. By proper use of
+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 denote the same
+file as the input file specification.
+
+In scalar context, fileparse() returns only the B<name> part of the filename.
+
+=back
+
+=head1 EXAMPLES
+
+Using Unix file syntax:
+
+ ($base,$path,$type) = fileparse('/virgil/aeneid/draft.book7',
+ qr{\.book\d+});
+
+would yield
+
+ $base eq 'draft'
+ $path eq '/virgil/aeneid/',
+ $type eq '.book7'
+
+Similarly, using VMS syntax:
+
+ ($name,$dir,$type) = fileparse('Doc_Root:[Help]Rhetoric.Rnh',
+ qr{\..*});
+
+would yield
+
+ $name eq 'Rhetoric'
+ $dir eq 'Doc_Root:[Help]'
+ $type eq '.Rnh'
+
+=over
+
+=item C<basename>
+
+The basename() routine returns the first element of the list produced
+by calling fileparse() with the same arguments, except that it always
+quotes metacharacters in the given suffixes. It is provided for
+programmer compatibility with the Unix shell command basename(1).
+
+=item C<dirname>
+
+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. (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()
+considers the directory name to be F<lib/>, while dirname() considers the
+directory name to be F<.>).
+
+=back
+
+=cut
+
+
+## use strict;
+# 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 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 = "2.73";
+
# fileparse_set_fstype() - specify OS-based rules used in future
# calls to routines in this package
#
-# Currently recognized values: VMS, MSDOS, MacOS
-# Any other name uses Unix-style rules
+# Currently recognized values: VMS, MSDOS, MacOS, AmigaOS, os2, RISCOS
+# Any other name uses Unix-style rules and is case-sensitive
sub fileparse_set_fstype {
- my($old) = $Fileparse_fstype;
- $Fileparse_fstype = $_[0] if $_[0];
- $old;
+ my @old = ($Fileparse_fstype, $Fileparse_igncase);
+ if (@_) {
+ $Fileparse_fstype = $_[0];
+ $Fileparse_igncase = ($_[0] =~ /^(?:MacOS|VMS|AmigaOS|os2|RISCOS|MSWin32|MSDOS)/i);
+ }
+ wantarray ? @old : $old[0];
}
# fileparse() - parse file specification
#
-# calling sequence:
-# ($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 %Config array). 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,$idx);
+ unless (defined $fullname) {
+ require Carp;
+ Carp::croak("fileparse(): need a valid pathname");
+ }
+ my($fstype,$igncase) = ($Fileparse_fstype, $Fileparse_igncase);
+ my($dirpath,$tail,$suffix,$basename);
+ my($taint) = substr($fullname,0,0); # Is $fullname tainted?
if ($fstype =~ /^VMS/i) {
if ($fullname =~ m#/#) { $fstype = '' } # We're doing Unix emulation
else {
- ($dirpath,$basename) = ($fullname =~ /(.*[:>\]])?(.*)/);
- $dirpath = $ENV{'DEFAULT'} unless $dirpath;
+ ($dirpath,$basename) = ($fullname =~ /^(.*[:>\]])?(.*)/s);
+ $dirpath ||= ''; # should always be defined
}
}
- if ($fstype =~ /^MSDOS/i) {
- ($dirpath,$basename) = ($fullname =~ /(.*\\)?(.*)/);
- $dirpath = '.' unless $dirpath;
+ if ($fstype =~ /^MS(DOS|Win32)|epoc/i) {
+ ($dirpath,$basename) = ($fullname =~ /^((?:.*[:\\\/])?)(.*)/s);
+ $dirpath .= '.\\' unless $dirpath =~ /[\\\/]\z/;
+ }
+ elsif ($fstype =~ /^os2/i) {
+ ($dirpath,$basename) = ($fullname =~ m#^((?:.*[:\\/])?)(.*)#s);
+ $dirpath = './' unless $dirpath; # Can't be 0
+ $dirpath .= '/' unless $dirpath =~ m#[\\/]\z#;
+ }
+ elsif ($fstype =~ /^MacOS/si) {
+ ($dirpath,$basename) = ($fullname =~ /^(.*:)?(.*)/s);
+ $dirpath = ':' unless $dirpath;
}
- elsif ($fstype =~ /^MAC/i) {
- ($dirpath,$basename) = ($fullname =~ /(.*:)?(.*)/);
+ elsif ($fstype =~ /^AmigaOS/i) {
+ ($dirpath,$basename) = ($fullname =~ /(.*[:\/])?(.*)/s);
+ $dirpath = './' unless $dirpath;
}
elsif ($fstype !~ /^VMS/i) { # default to Unix
- ($dirpath,$basename) = ($fullname =~ m#(.*/)?(.*)#);
- $dirpath = '.' unless $dirpath;
+ ($dirpath,$basename) = ($fullname =~ m#^(.*/)?(.*)#s);
+ if ($^O eq 'VMS' and $fullname =~ m:^(/[^/]+/000000(/|$))(.*):) {
+ # dev:[000000] is top of VMS tree, similar to Unix '/'
+ # so strip it off and treat the rest as "normal"
+ my $devspec = $1;
+ my $remainder = $3;
+ ($dirpath,$basename) = ($remainder =~ m#^(.*/)?(.*)#s);
+ $dirpath ||= ''; # should always be defined
+ $dirpath = $devspec.$dirpath;
+ }
+ $dirpath = './' unless $dirpath;
}
if (@suffices) {
+ $tail = '';
foreach $suffix (@suffices) {
- if ($basename =~ /($suffix)$/) {
+ my $pat = ($igncase ? '(?i)' : '') . "($suffix)\$";
+ if ($basename =~ s/$pat//s) {
+ $taint .= substr($suffix,0,0);
$tail = $1 . $tail;
- $basename = $`;
}
}
}
- wantarray ? ($basename,$dirpath,$tail) : $basename;
-
+ $tail .= $taint if defined $tail; # avoid warning if $tail == undef
+ wantarray ? ($basename .= $taint, $dirpath .= $taint, $tail)
+ : ($basename .= $taint);
}
my($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 }
- chop $dirname;
- $dirname =~ s:[^\\]+$:: unless $basename;
- $dirname = '.' unless $dirname;
+ if ($fstype =~ /MacOS/i) {
+ if( !length($basename) && $dirname !~ /^[^:]+:\z/) {
+ $dirname =~ s/([^:]):\z/$1/s;
+ ($basename,$dirname) = fileparse $dirname;
+ }
+ $dirname .= ":" unless $dirname =~ /:\z/;
}
- else {
- if ( $dirname eq '/') { return $dirname }
+ elsif ($fstype =~ /MS(DOS|Win32)|os2/i) {
+ $dirname =~ s/([^:])[\\\/]*\z/$1/;
+ unless( length($basename) ) {
+ ($basename,$dirname) = fileparse $dirname;
+ $dirname =~ s/([^:])[\\\/]*\z/$1/;
+ }
+ }
+ elsif ($fstype =~ /AmigaOS/i) {
+ if ( $dirname =~ /:\z/) { return $dirname }
chop $dirname;
- $dirname =~ s:[^/]+$:: unless $basename;
- $dirname = '.' unless $dirname;
+ $dirname =~ s#[^:/]+\z## unless length($basename);
+ }
+ else {
+ $dirname =~ s:(.)/*\z:$1:s;
+ unless( length($basename) ) {
+ local($File::Basename::Fileparse_fstype) = $fstype;
+ ($basename,$dirname) = fileparse $dirname;
+ $dirname =~ s:(.)/*\z:$1:s;
+ }
}
$dirname;
}
-$Fileparse_fstype = $Config{'osname'};
+fileparse_set_fstype $^O;
1;
projects / p5sagit/p5-mst-13.2.git / blobdiff