GIF89a;
Direktori : /usr/share/perl5/Tie/ |
Current File : //usr/share/perl5/Tie/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]) } 1;