golden hour

/usr/share/perl5/Tie

File/Folder	Size	Actions
Array.pm	7.15 KB
File.pm	75.56 KB
Handle.pm	4.1 KB
Hash.pm	7.45 KB
Memoize.pm	4.15 KB
RefHash.pm	6.09 KB
Scalar.pm	4.06 KB
StdHandle.pm	1.31 KB
SubstrHash.pm	5.28 KB

Edit: StdHandle.pm

package Tie::StdHandle;

use strict;

use Tie::Handle;
use vars qw(@ISA $VERSION);
@ISA = 'Tie::Handle';
$VERSION = '4.2';

=head1 NAME

Tie::StdHandle - base class definitions for tied handles

=head1 SYNOPSIS

package NewHandle;
    require Tie::Handle;

@ISA = qw(Tie::Handle);

sub READ { ... }		# Provide a needed method
    sub TIEHANDLE { ... }	# Overrides inherited method

package main;

tie *FH, 'NewHandle';

=head1 DESCRIPTION

The B<Tie::StdHandle> package provide most methods for file handles described
in L<perltie> (the exceptions are C<UNTIE> and C<DESTROY>).  It causes tied
file handles to behave exactly like standard file handles and allow for
selective overwriting of methods.

=cut

sub TIEHANDLE 
{
 my $class = shift;
 my $fh    = \do { local *HANDLE};
 bless $fh,$class;
 $fh->OPEN(@_) if (@_);
 return $fh;
}

sub EOF     { eof($_[0]) }
sub TELL    { tell($_[0]) }
sub FILENO  { fileno($_[0]) }
sub SEEK    { seek($_[0],$_[1],$_[2]) }
sub CLOSE   { close($_[0]) }
sub BINMODE { binmode($_[0]) }

sub OPEN
{
 $_[0]->CLOSE if defined($_[0]->FILENO);
 @_ == 2 ? open($_[0], $_[1]) : open($_[0], $_[1], $_[2]);
}

sub READ     { read($_[0],$_[1],$_[2]) }
sub READLINE { my $fh = $_[0]; <$fh> }
sub GETC     { getc($_[0]) }

sub WRITE
{
 my $fh = $_[0];
 print $fh substr($_[1],0,$_[2])
}