package File::DosGlob;
-unless (caller) {
- $| = 1;
- while (@ARGV) {
- #
- # We have to do this one by one for compatibility reasons.
- # If an arg doesn't match anything, we are supposed to return
- # the original arg. I know, it stinks, eh?
- #
- my $arg = shift;
- my @m = doglob(1,$arg);
- print (@m ? join("\0", sort @m) : $arg);
- print "\0" if @ARGV;
- }
-}
-
sub doglob {
my $cond = shift;
my @retval = ();
}
#
-# this can be used to override CORE::glob
-# by saying C<use File::DosGlob 'glob';>.
+# this can be used to override CORE::glob in a specific
+# package by saying C<use File::DosGlob 'glob';> in that
+# namespace.
#
-sub glob { doglob(1,@_) }
+
+# context (keyed by second cxix arg provided by core)
+my %iter;
+my %entries;
+
+sub glob {
+ my $pat = shift;
+ my $cxix = shift;
+
+ # glob without args defaults to $_
+ $pat = $_ unless defined $pat;
+
+ # assume global context if not provided one
+ $cxix = '_G_' unless defined $cxix;
+ $iter{$cxix} = 0 unless exists $iter{$cxix};
+
+ # if we're just beginning, do it all first
+ if ($iter{$cxix} == 0) {
+ $entries{$cxix} = [doglob(1,$pat)];
+ }
+
+ # chuck it all out, quick or slow
+ if (wantarray) {
+ delete $iter{$cxix};
+ return @{delete $entries{$cxix}};
+ }
+ else {
+ if ($iter{$cxix} = scalar @{$entries{$cxix}}) {
+ return shift @{$entries{$cxix}};
+ }
+ else {
+ # return undef for EOL
+ delete $iter{$cxix};
+ delete $entries{$cxix};
+ return undef;
+ }
+ }
+}
sub import {
my $pkg = shift;
- my $callpkg = caller(0);
+ return unless @_;
my $sym = shift;
+ my $callpkg = ($sym =~ s/^GLOBAL_// ? 'CORE::GLOBAL' : caller(0));
*{$callpkg.'::'.$sym} = \&{$pkg.'::'.$sym} if $sym eq 'glob';
}
File::DosGlob - DOS like globbing and then some
-perlglob.bat - a more capable perlglob.exe replacement
-
=head1 SYNOPSIS
require 5.004;
- use File::DosGlob 'glob'; # override CORE::glob
+
+ # override CORE::glob in current package
+ use File::DosGlob 'glob';
+
+ # override CORE::glob in ALL packages (use with extreme caution!)
+ use File::DosGlob 'GLOBAL_glob';
+
@perlfiles = glob "..\\pe?l/*.p?";
print <..\\pe?l/*.p?>;
- # from the command line
+ # from the command line (overrides only in main::)
> perl -MFile::DosGlob=glob -e "print <../pe*/*p?>"
-
- > perlglob ../pe*/*p?
=head1 DESCRIPTION
A module that implements DOS-like globbing with a few enhancements.
-This file is also a portable replacement for perlglob.exe. It
-is largely compatible with perlglob.exe (the M$ setargv.obj
+It is largely compatible with perlglob.exe (the M$ setargv.obj
version) in all but one respect--it understands wildcards in
directory components.
You may have to double the backslashes if you are putting them in
literally, due to double-quotish parsing of the pattern by perl.
-When invoked as a program, it will print null-separated filenames
-to standard output.
-
-While one may replace perlglob.exe with this, usage by overriding
-CORE::glob via importation should be much more efficient, because
-it avoids launching a separate process, and is therefore strongly
-recommended.
-
Extending it to csh patterns is left as an exercise to the reader.
=head1 EXPORTS (by request only)
=item *
+Support for globally overriding glob() (GSAR 3-JUN-98)
+
+=item *
+
+Scalar context, independent iterator context fixes (GSAR 15-SEP-97)
+
+=item *
+
A few dir-vs-file optimizations result in glob importation being
10 times faster than using perlglob.exe, and using perlglob.bat is
only twice as slow as perlglob.exe (GSAR 28-MAY-97)
perl
+perlglob.bat
+
=cut