C///

\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5�\D6?\BD�\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2� \00$\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4�\E9\F2�\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// package IO::InnerFile; use strict; use warnings; use Symbol; our $VERSION = '2.113'; sub new { my ($class, $fh, $start, $lg) = @_; $start = 0 if (!$start or ($start < 0)); $lg = 0 if (!$lg or ($lg < 0)); ### Create the underlying "object": my $a = { FH => $fh, CRPOS => 0, START => $start, LG => $lg, }; ### Create a new filehandle tied to this object: $fh = gensym; tie(*$fh, $class, $a); return bless($fh, $class); } sub TIEHANDLE { my ($class, $data) = @_; return bless($data, $class); } sub DESTROY { my ($self) = @_; $self->close() if (ref($self) eq 'SCALAR'); } sub set_length { tied(${$_[0]})->{LG} = $_[1]; } sub get_length { tied(${$_[0]})->{LG}; } sub add_length { tied(${$_[0]})->{LG} += $_[1]; } sub set_start { tied(${$_[0]})->{START} = $_[1]; } sub get_start { tied(${$_[0]})->{START}; } sub set_end { tied(${$_[0]})->{LG} = $_[1] - tied(${$_[0]})->{START}; } sub get_end { tied(${$_[0]})->{LG} + tied(${$_[0]})->{START}; } sub write { shift->WRITE(@_) } sub print { shift->PRINT(@_) } sub printf { shift->PRINTF(@_) } sub flush { "0 but true"; } sub fileno { } sub binmode { 1; } sub getc { return GETC(tied(${$_[0]}) ); } sub read { return READ( tied(${$_[0]}), @_[1,2,3] ); } sub readline { return READLINE( tied(${$_[0]}) ); } sub getline { return READLINE( tied(${$_[0]}) ); } sub close { return CLOSE(tied(${$_[0]}) ); } sub seek { my ($self, $ofs, $whence) = @_; $self = tied( $$self ); $self->{CRPOS} = $ofs if ($whence == 0); $self->{CRPOS}+= $ofs if ($whence == 1); $self->{CRPOS} = $self->{LG} + $ofs if ($whence == 2); $self->{CRPOS} = 0 if ($self->{CRPOS} < 0); $self->{CRPOS} = $self->{LG} if ($self->{CRPOS} > $self->{LG}); return 1; } sub tell { return tied(${$_[0]})->{CRPOS}; } sub WRITE { die "inner files can only open for reading\n"; } sub PRINT { die "inner files can only open for reading\n"; } sub PRINTF { die "inner files can only open for reading\n"; } sub GETC { my ($self) = @_; return 0 if ($self->{CRPOS} >= $self->{LG}); my $data; ### Save and seek... my $old_pos = $self->{FH}->tell; $self->{FH}->seek($self->{CRPOS}+$self->{START}, 0); ### ...read... my $lg = $self->{FH}->read($data, 1); $self->{CRPOS} += $lg; ### ...and restore: $self->{FH}->seek($old_pos, 0); $self->{LG} = $self->{CRPOS} unless ($lg); return ($lg ? $data : undef); } sub READ { my ($self, $undefined, $lg, $ofs) = @_; $undefined = undef; return 0 if ($self->{CRPOS} >= $self->{LG}); $lg = $self->{LG} - $self->{CRPOS} if ($self->{CRPOS} + $lg > $self->{LG}); return 0 unless ($lg); ### Save and seek... my $old_pos = $self->{FH}->tell; $self->{FH}->seek($self->{CRPOS}+$self->{START}, 0); ### ...read... $lg = $self->{FH}->read($_[1], $lg, $_[3] ); $self->{CRPOS} += $lg; ### ...and restore: $self->{FH}->seek($old_pos, 0); $self->{LG} = $self->{CRPOS} unless ($lg); return $lg; } sub READLINE { my ($self) = @_; return $self->_readline_helper() unless wantarray; my @arr; while(defined(my $line = $self->_readline_helper())) { push(@arr, $line); } return @arr; } sub _readline_helper { my ($self) = @_; return undef if ($self->{CRPOS} >= $self->{LG}); # Handle slurp mode (CPAN ticket #72710) if (! defined($/)) { my $text; $self->READ($text, $self->{LG} - $self->{CRPOS}); return $text; } ### Save and seek... my $old_pos = $self->{FH}->tell; $self->{FH}->seek($self->{CRPOS}+$self->{START}, 0); ### ...read... my $text = $self->{FH}->getline; ### ...and restore: $self->{FH}->seek($old_pos, 0); #### If we detected a new EOF ... unless (defined $text) { $self->{LG} = $self->{CRPOS}; return undef; } my $lg=length($text); $lg = $self->{LG} - $self->{CRPOS} if ($self->{CRPOS} + $lg > $self->{LG}); $self->{CRPOS} += $lg; return substr($text, 0,$lg); } sub CLOSE { %{$_[0]}=(); } 1; __END__ __END__ =head1 NAME IO::InnerFile - define a file inside another file =head1 SYNOPSIS use strict; use warnings; use IO::InnerFile; # Read a subset of a file: my $fh = _some_file_handle; my $start = 10; my $length = 50; my $inner = IO::InnerFile->new($fh, $start, $length); while (my $line = <$inner>) { # ... } =head1 DESCRIPTION If you have a file handle that can C and C, then you can open an L on a range of the underlying file. =head1 CONSTRUCTORS L implements the following constructors. =head2 new my $inner = IO::InnerFile->new($fh); $inner = IO::InnerFile->new($fh, 10); $inner = IO::InnerFile->new($fh, 10, 50); Create a new L opened on the given file handle. The file handle supplied B be able to both C and C. The second and third parameters are start and length. Both are defaulted to zero (C<0>). Negative values are silently coerced to zero. =head1 METHODS L implements the following methods. =head2 add_length $inner->add_leng