Gecko [ www.blackthorn-inc.com ]

Name	Size	Permission	Date
App	[ DIR ]	drwxr-xr-x	2016-10-10 17:37
Archive	[ DIR ]	drwxr-xr-x	2016-10-10 17:36
Attribute	[ DIR ]	drwxr-xr-x	2016-10-10 17:36
B	[ DIR ]	drwxr-xr-x	2016-10-10 17:38
CGI	[ DIR ]	drwxr-xr-x	2016-10-10 17:36
CPAN	[ DIR ]	drwxr-xr-x	2016-10-10 17:36
Carp	[ DIR ]	drwxr-xr-x	2016-10-10 17:36
Class	[ DIR ]	drwxr-xr-x	2015-02-14 16:56
Compress	[ DIR ]	drwxr-xr-x	2016-10-10 17:38
Config	[ DIR ]	drwxr-xr-x	2016-10-10 17:36
DBM_Filter	[ DIR ]	drwxr-xr-x	2015-02-14 16:56
Data	[ DIR ]	drwxr-xr-x	2016-10-10 17:38
Devel	[ DIR ]	drwxr-xr-x	2016-10-10 17:39
Digest	[ DIR ]	drwxr-xr-x	2016-10-10 17:39
Encode	[ DIR ]	drwxr-xr-x	2016-10-10 17:39
Exporter	[ DIR ]	drwxr-xr-x	2016-10-10 17:36
ExtUtils	[ DIR ]	drwxr-xr-x	2016-10-10 17:36
File	[ DIR ]	drwxr-xr-x	2016-10-10 17:39
Filter	[ DIR ]	drwxr-xr-x	2016-10-10 17:39
Getopt	[ DIR ]	drwxr-xr-x	2016-10-10 17:36
HTTP	[ DIR ]	drwxr-xr-x	2016-10-10 17:36
Hash	[ DIR ]	drwxr-xr-x	2016-10-10 17:39
I18N	[ DIR ]	drwxr-xr-x	2016-10-10 17:39
IO	[ DIR ]	drwxr-xr-x	2016-10-10 17:39
IPC	[ DIR ]	drwxr-xr-x	2016-10-10 17:39
JSON	[ DIR ]	drwxr-xr-x	2016-10-10 17:37
List	[ DIR ]	drwxr-xr-x	2016-10-10 17:39
Locale	[ DIR ]	drwxr-xr-x	2016-10-10 17:37
MIME	[ DIR ]	drwxr-xr-x	2016-10-10 17:40
Math	[ DIR ]	drwxr-xr-x	2016-10-10 17:37
Memoize	[ DIR ]	drwxr-xr-x	2016-10-10 17:37
Module	[ DIR ]	drwxr-xr-x	2016-10-10 17:37
Net	[ DIR ]	drwxr-xr-x	2016-10-10 17:37
Package	[ DIR ]	drwxr-xr-x	2016-10-10 17:37
Params	[ DIR ]	drwxr-xr-x	2016-10-10 17:37
Parse	[ DIR ]	drwxr-xr-x	2016-10-10 17:37
Perl	[ DIR ]	drwxr-xr-x	2016-10-10 17:37
PerlIO	[ DIR ]	drwxr-xr-x	2016-10-10 17:40
Pod	[ DIR ]	drwxr-xr-x	2016-10-10 17:37
Scalar	[ DIR ]	drwxr-xr-x	2016-10-10 17:39
Search	[ DIR ]	drwxr-xr-x	2016-10-10 17:37
Sys	[ DIR ]	drwxr-xr-x	2016-10-10 17:40
TAP	[ DIR ]	drwxr-xr-x	2016-10-10 17:37
Term	[ DIR ]	drwxr-xr-x	2016-10-10 17:37
Test	[ DIR ]	drwxr-xr-x	2016-10-10 17:37
Text	[ DIR ]	drwxr-xr-x	2016-10-10 17:37
Thread	[ DIR ]	drwxr-xr-x	2016-10-10 17:37
Tie	[ DIR ]	drwxr-xr-x	2016-10-10 17:40
Time	[ DIR ]	drwxr-xr-x	2016-10-10 17:40
Unicode	[ DIR ]	drwxr-xr-x	2016-10-10 17:40
User	[ DIR ]	drwxr-xr-x	2015-02-14 16:56
XS	[ DIR ]	drwxr-xr-x	2016-10-10 17:41
auto	[ DIR ]	drwxr-xr-x	2016-10-10 18:16
autodie	[ DIR ]	drwxr-xr-x	2016-10-10 17:36
encoding	[ DIR ]	drwxr-xr-x	2016-10-10 17:36
feature	[ DIR ]	drwxr-xr-x	2015-02-14 16:56
inc	[ DIR ]	drwxr-xr-x	2016-10-10 17:37
overload	[ DIR ]	drwxr-xr-x	2016-10-10 18:13
perl5db	[ DIR ]	drwxr-xr-x	2015-02-14 16:56
threads	[ DIR ]	drwxr-xr-x	2016-10-10 17:40
unicore	[ DIR ]	drwxr-xr-x	2016-10-10 18:53
version	[ DIR ]	drwxr-xr-x	2016-10-10 17:38
warnings	[ DIR ]	drwxr-xr-x	2015-02-14 16:56
.exists	0 B	-rw-r--r--	2016-10-10 18:16
AnyDBM_File.pm	2.56 KB	-r--r--r--	2014-12-27 11:48
AnyDBM_File.t	3.36 KB	-r--r--r--	2014-12-27 11:48
AutoLoader.pm	15.43 KB	-r--r--r--	2014-12-27 11:48
AutoSplit.pm	19.18 KB	-r--r--r--	2014-12-27 11:48
B.pm	28.07 KB	-r--r--r--	2014-12-27 11:49
Benchmark.pm	29.22 KB	-r--r--r--	2014-12-27 11:49
Benchmark.t	21.04 KB	-r--r--r--	2014-12-27 11:48
CGI.pm	255.23 KB	-r--r--r--	2014-12-27 11:49
CORE.pod	3.19 KB	-r--r--r--	2014-12-27 11:48
CPAN.pm	134.45 KB	-r--r--r--	2014-12-27 11:48
Carp.pm	27.8 KB	-r--r--r--	2014-12-27 11:49
Config.pm	3.18 KB	-rw-r--r--	2016-10-10 17:36
Config.pod	229.34 KB	-rw-r--r--	2016-10-10 17:36
Config.t	8.26 KB	-r--r--r--	2014-12-27 11:48
Config_git.pl	409 B	-rw-r--r--	2016-10-10 17:36
Config_heavy.pl	40.41 KB	-rw-r--r--	2016-10-10 17:36
Cwd.pm	21.95 KB	-r--r--r--	2015-01-10 12:06
DB.pm	18.5 KB	-r--r--r--	2014-12-27 11:48
DB.t	16.28 KB	-r--r--r--	2014-12-27 11:48
DBM_Filter.pm	14.05 KB	-r--r--r--	2014-12-27 11:48
DB_File.pm	62.24 KB	-r--r--r--	2016-10-10 17:38
Digest.pm	10.35 KB	-r--r--r--	2014-12-27 11:48
DirHandle.pm	1.52 KB	-r--r--r--	2014-12-27 11:48
DirHandle.t	930 B	-r--r--r--	2014-12-27 11:48
Dumpvalue.pm	16.5 KB	-r--r--r--	2014-12-27 11:48
DynaLoader.pm	24.99 KB	-r--r--r--	2016-10-10 17:38
Encode.pm	32.44 KB	-r--r--r--	2014-12-27 11:49
English.pm	4.64 KB	-r--r--r--	2014-12-27 11:48
English.t	4.11 KB	-r--r--r--	2014-12-27 11:48
Env.pm	5.39 KB	-r--r--r--	2014-12-27 11:48
Errno.pm	6.33 KB	-r--r--r--	2016-10-10 17:36
Exporter.pm	18.31 KB	-r--r--r--	2014-12-27 11:49
Fatal.pm	59.38 KB	-r--r--r--	2014-12-27 11:49
Fcntl.pm	3.83 KB	-r--r--r--	2014-12-27 11:49
FileCache.pm	5.44 KB	-r--r--r--	2014-12-27 11:48
FileHandle.pm	6.62 KB	-r--r--r--	2014-12-27 11:48
FileHandle.t	2.48 KB	-r--r--r--	2014-12-27 11:48
FindBin.pm	4.45 KB	-r--r--r--	2014-12-27 11:48
FindBin.t	338 B	-r--r--r--	2014-12-27 11:48
GDBM_File.pm	1.51 KB	-r--r--r--	2014-12-27 11:48
IO.pm	1.36 KB	-r--r--r--	2014-12-27 11:49
Internals.t	5.04 KB	-r--r--r--	2014-12-27 11:48
Memoize.pm	35.28 KB	-r--r--r--	2014-12-27 11:48
NDBM_File.pm	2.44 KB	-r--r--r--	2014-12-27 11:49
NEXT.pm	18.05 KB	-r--r--r--	2014-12-27 11:48
O.pm	4.11 KB	-r--r--r--	2014-12-27 11:48
Opcode.pm	15.33 KB	-r--r--r--	2014-12-27 11:49
POSIX.pm	16.44 KB	-r--r--r--	2014-12-27 11:49
POSIX.pod	65.45 KB	-r--r--r--	2014-12-27 11:49
PerlIO.pm	10.21 KB	-r--r--r--	2014-12-27 11:48
SDBM_File.pm	3.46 KB	-r--r--r--	2014-12-27 11:49
Safe.pm	24.27 KB	-r--r--r--	2014-12-27 11:49
SelectSaver.pm	1.05 KB	-r--r--r--	2014-12-27 11:48
SelectSaver.t	365 B	-r--r--r--	2014-12-27 11:48
SelfLoader.pm	16.94 KB	-r--r--r--	2014-12-27 11:49
Socket.pm	35.47 KB	-r--r--r--	2014-12-27 11:49
Storable.pm	42.13 KB	-r--r--r--	2015-01-15 22:12
Symbol.pm	4.68 KB	-r--r--r--	2014-12-27 11:48
Symbol.t	2.52 KB	-r--r--r--	2014-12-27 11:48
Test.pm	28.12 KB	-r--r--r--	2014-12-27 11:48
Thread.pm	8.09 KB	-r--r--r--	2014-12-27 11:48
Thread.t	1.59 KB	-r--r--r--	2014-12-27 11:48
UNIVERSAL.pm	6.97 KB	-r--r--r--	2014-12-27 11:49
XSLoader.pm	9.99 KB	-r--r--r--	2016-10-10 17:38
_charnames.pm	31.63 KB	-r--r--r--	2014-12-27 11:49
arybase.pm	2.75 KB	-r--r--r--	2014-12-27 11:49
attributes.pm	15.95 KB	-r--r--r--	2014-12-27 12:30
autodie.pm	11.9 KB	-r--r--r--	2014-12-27 11:49
autouse.pm	4.14 KB	-r--r--r--	2014-12-27 11:48
base.pm	7.21 KB	-r--r--r--	2014-12-27 11:48
bigint.pm	18.29 KB	-r--r--r--	2014-12-27 11:49
bignum.pm	17.7 KB	-r--r--r--	2014-12-27 11:49
bigrat.pm	13.58 KB	-r--r--r--	2014-12-27 11:49
blib.pm	2.04 KB	-r--r--r--	2014-12-27 11:48
blib.t	1.81 KB	-r--r--r--	2014-12-27 11:48
buildcustomize.pl	1.1 KB	-rw-r--r--	2016-10-10 17:36
bytes.pm	2.96 KB	-r--r--r--	2014-12-27 11:48
bytes.t	2.78 KB	-r--r--r--	2014-12-27 11:48
bytes_heavy.pl	758 B	-r--r--r--	2014-12-27 11:48
charnames.pm	20.39 KB	-r--r--r--	2014-12-27 11:49
charnames.t	372.58 KB	-r--r--r--	2014-12-27 11:49
constant.pm	13.99 KB	-r--r--r--	2014-12-27 11:49
dbm_filter_util.pl	1.83 KB	-r--r--r--	2014-12-27 11:48
deprecate.pm	3.01 KB	-r--r--r--	2014-12-27 11:48
diagnostics.pm	18.26 KB	-r--r--r--	2014-12-27 11:48
diagnostics.t	7.1 KB	-r--r--r--	2014-12-27 11:49
dumpvar.pl	15.24 KB	-r--r--r--	2014-12-27 11:48
dumpvar.t	5.81 KB	-r--r--r--	2014-12-27 11:48
encoding.pm	20.04 KB	-r--r--r--	2014-12-27 11:49
experimental.pm	3.88 KB	-r--r--r--	2014-12-27 11:49
feature.pm	13.46 KB	-rw-r--r--	2014-12-27 12:46
feature.t	78 B	-r--r--r--	2014-12-27 11:48
fields.pm	9.24 KB	-r--r--r--	2014-12-27 11:48
filetest.pm	3.91 KB	-r--r--r--	2014-12-27 11:48
filetest.t	3 KB	-r--r--r--	2014-12-27 11:48
h2ph.t	1.58 KB	-r--r--r--	2014-12-27 11:48
h2xs.t	7.64 KB	-r--r--r--	2014-12-27 11:48
if.pm	2.63 KB	-r--r--r--	2014-12-27 11:48
integer.pm	3.18 KB	-r--r--r--	2014-12-27 11:48
integer.t	1.32 KB	-r--r--r--	2014-12-27 11:48
less.pm	3.13 KB	-r--r--r--	2014-12-27 11:48
less.t	901 B	-r--r--r--	2014-12-27 11:48
lib.pm	5.87 KB	-r--r--r--	2016-10-10 17:37
locale.pm	2.13 KB	-r--r--r--	2014-12-27 11:49
locale.t	72.86 KB	-r--r--r--	2014-12-27 11:49
mro.pm	9.86 KB	-r--r--r--	2014-12-27 11:49
open.pm	7.83 KB	-r--r--r--	2014-12-27 11:48
open.t	6.4 KB	-r--r--r--	2014-12-27 11:48
ops.pm	997 B	-r--r--r--	2014-12-27 11:48
overload.pm	51.41 KB	-r--r--r--	2014-12-27 11:49
overload.t	71.98 KB	-r--r--r--	2014-12-27 11:49
overload64.t	8.33 KB	-r--r--r--	2014-12-27 11:48
overloading.pm	1.77 KB	-r--r--r--	2014-12-27 11:48
overloading.t	3.25 KB	-r--r--r--	2014-12-27 11:48
parent.pm	2.83 KB	-r--r--r--	2014-12-27 11:48
perl5db.pl	307.01 KB	-r--r--r--	2014-12-27 11:49
perl5db.t	56.06 KB	-r--r--r--	2014-12-27 11:49
perldoc.pod	8.69 KB	-r--r--r--	2014-12-27 11:48
perlfaq.pm	94 B	-r--r--r--	2014-12-27 11:49
perlfaq.pod	22.18 KB	-r--r--r--	2014-12-27 11:48
perlfaq1.pod	14.36 KB	-r--r--r--	2014-12-27 11:49
perlfaq2.pod	9.24 KB	-r--r--r--	2014-12-27 11:49
perlfaq3.pod	37.67 KB	-r--r--r--	2014-12-27 11:48
perlfaq4.pod	87.39 KB	-r--r--r--	2014-12-27 11:49
perlfaq5.pod	54.11 KB	-r--r--r--	2014-12-27 11:49
perlfaq6.pod	38.66 KB	-r--r--r--	2014-12-27 11:49
perlfaq7.pod	36.98 KB	-r--r--r--	2014-12-27 11:49
perlfaq8.pod	48.9 KB	-r--r--r--	2014-12-27 11:48
perlfaq9.pod	14.7 KB	-r--r--r--	2014-12-27 11:48
perlglossary.pod	133.98 KB	-r--r--r--	2014-12-27 11:48
perlxs.pod	76.6 KB	-r--r--r--	2014-12-27 11:49
perlxstut.pod	48.91 KB	-r--r--r--	2014-12-27 11:48
perlxstypemap.pod	23.02 KB	-r--r--r--	2014-12-27 11:49
re.pm	17.55 KB	-r--r--r--	2014-12-27 11:49
sigtrap.pm	7.44 KB	-r--r--r--	2014-12-27 11:48
sigtrap.t	2.65 KB	-r--r--r--	2014-12-27 11:48
sort.pm	5.94 KB	-r--r--r--	2014-12-27 11:48
sort.t	5.54 KB	-r--r--r--	2014-12-27 11:49
strict.pm	3.83 KB	-r--r--r--	2014-12-27 11:49
strict.t	439 B	-r--r--r--	2014-12-27 11:49
subs.pm	848 B	-r--r--r--	2014-12-27 11:48
subs.t	79 B	-r--r--r--	2014-12-27 11:48
threads.pm	34.93 KB	-r--r--r--	2014-12-27 11:49
utf8.pm	7.64 KB	-r--r--r--	2014-12-27 11:49
utf8.t	21.67 KB	-r--r--r--	2014-12-27 11:48
utf8_heavy.pl	31 KB	-r--r--r--	2014-12-27 11:49
vars.pm	2.36 KB	-r--r--r--	2014-12-27 11:48
vars.t	2.68 KB	-r--r--r--	2014-12-27 11:48
vars_carp.t	246 B	-r--r--r--	2014-12-27 11:48
version.pm	1.58 KB	-r--r--r--	2014-12-27 11:48
version.pod	9.62 KB	-r--r--r--	2014-12-27 11:48
vmsish.pm	4.21 KB	-r--r--r--	2014-12-27 11:48
vmsish.t	7.21 KB	-r--r--r--	2014-12-27 11:48
warnings.pm	38.5 KB	-rw-r--r--	2014-12-27 11:49
warnings.t	120 B	-r--r--r--	2014-12-27 11:48

Rename

package Symbol;

=head1 NAME

Symbol - manipulate Perl symbols and their names

=head1 SYNOPSIS

use Symbol;

$sym = gensym;
    open($sym, "filename");
    $_ = <$sym>;
    # etc.

ungensym $sym;      # no effect

# replace *FOO{IO} handle but not $FOO, %FOO, etc.
    *FOO = geniosym;

print qualify("x"), "\n";              # "main::x"
    print qualify("x", "FOO"), "\n";       # "FOO::x"
    print qualify("BAR::x"), "\n";         # "BAR::x"
    print qualify("BAR::x", "FOO"), "\n";  # "BAR::x"
    print qualify("STDOUT", "FOO"), "\n";  # "main::STDOUT" (global)
    print qualify(\*x), "\n";              # returns \*x
    print qualify(\*x, "FOO"), "\n";       # returns \*x

use strict refs;
    print { qualify_to_ref $fh } "foo!\n";
    $ref = qualify_to_ref $name, $pkg;

use Symbol qw(delete_package);
    delete_package('Foo::Bar');
    print "deleted\n" unless exists $Foo::{'Bar::'};

=head1 DESCRIPTION

C<Symbol::gensym> creates an anonymous glob and returns a reference
to it.  Such a glob reference can be used as a file or directory
handle.

For backward compatibility with older implementations that didn't
support anonymous globs, C<Symbol::ungensym> is also provided.
But it doesn't do anything.

C<Symbol::geniosym> creates an anonymous IO handle.  This can be
assigned into an existing glob without affecting the non-IO portions
of the glob.

C<Symbol::qualify> turns unqualified symbol names into qualified
variable names (e.g. "myvar" -E<gt> "MyPackage::myvar").  If it is given a
second parameter, C<qualify> uses it as the default package;
otherwise, it uses the package of its caller.  Regardless, global
variable names (e.g. "STDOUT", "ENV", "SIG") are always qualified with
"main::".

Qualification applies only to symbol names (strings).  References are
left unchanged under the assumption that they are glob references,
which are qualified by their nature.

C<Symbol::qualify_to_ref> is just like C<Symbol::qualify> except that it
returns a glob ref rather than a symbol name, so you can use the result
even if C<use strict 'refs'> is in effect.

C<Symbol::delete_package> wipes out a whole package namespace.  Note
this routine is not exported by default--you may want to import it
explicitly.

=head1 BUGS

C<Symbol::delete_package> is a bit too powerful. It undefines every symbol that
lives in the specified package. Since perl, for performance reasons, does not
perform a symbol table lookup each time a function is called or a global
variable is accessed, some code that has already been loaded and that makes use
of symbols in package C<Foo> may stop working after you delete C<Foo>, even if
you reload the C<Foo> module afterwards.

=cut

BEGIN { require 5.005; }

require Exporter;
@ISA = qw(Exporter);
@EXPORT = qw(gensym ungensym qualify qualify_to_ref);
@EXPORT_OK = qw(delete_package geniosym);

$VERSION = '1.07';

my $genpkg = "Symbol::";
my $genseq = 0;

my %global = map {$_ => 1} qw(ARGV ARGVOUT ENV INC SIG STDERR STDIN STDOUT);

#
# Note that we never _copy_ the glob; we just make a ref to it.
# If we did copy it, then SVf_FAKE would be set on the copy, and
# glob-specific behaviors (e.g. C<*$ref = \&func>) wouldn't work.
#
sub gensym () {
    my $name = "GEN" . $genseq++;
    my $ref = \*{$genpkg . $name};
    delete $$genpkg{$name};
    $ref;
}

sub geniosym () {
    my $sym = gensym();
    # force the IO slot to be filled
    select(select $sym);
    *$sym{IO};
}

sub ungensym ($) {}

sub qualify ($;$) {
    my ($name) = @_;
    if (!ref($name) && index($name, '::') == -1 && index($name, "'") == -1) {
	my $pkg;
	# Global names: special character, "^xyz", or other. 
	if ($name =~ /^(([^a-z])|(\^[a-z_]+))\z/i || $global{$name}) {
	    # RGS 2001-11-05 : translate leading ^X to control-char
	    $name =~ s/^\^([a-z_])/'qq(\c'.$1.')'/eei;
	    $pkg = "main";
	}
	else {
	    $pkg = (@_ > 1) ? $_[1] : caller;
	}
	$name = $pkg . "::" . $name;
    }
    $name;
}

sub qualify_to_ref ($;$) {
    return \*{ qualify $_[0], @_ > 1 ? $_[1] : caller };
}

#
# of Safe.pm lineage
#
sub delete_package ($) {
    my $pkg = shift;

# expand to full symbol table name if needed

unless ($pkg =~ /^main::.*::$/) {
        $pkg = "main$pkg"	if	$pkg =~ /^::/;
        $pkg = "main::$pkg"	unless	$pkg =~ /^main::/;
        $pkg .= '::'		unless	$pkg =~ /::$/;
    }

my($stem, $leaf) = $pkg =~ m/(.*::)(\w+::)$/;
    my $stem_symtab = *{$stem}{HASH};
    return unless defined $stem_symtab and exists $stem_symtab->{$leaf};

# free all the symbols in the package

my $leaf_symtab = *{$stem_symtab->{$leaf}}{HASH};
    foreach my $name (keys %$leaf_symtab) {
        undef *{$pkg . $name};
    }

# delete the symbol table

%$leaf_symtab = ();
    delete $stem_symtab->{$leaf};
}