PRODUCT=3/627/1/1
NAME="QEMU QEMU USB Tablet"
PHYS="usb-0000:00:01.2-1/input0"
UNIQ="42"
PROP=0
EV=1f
KEY=70000 0 0 0 0
REL=100
ABS=3
MSC=10
MODALIAS=input:b0003v0627p0001e0001-e0,1,2,3,4,k110,111,112,r8,a0,1,m4,lsfw
355 c
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&=LV[( package IO::InnerFile;
=head1 NAME
IO::InnerFile - define a file inside another file
=head1 SYNOPSIS
### Read a subset of a file:
$inner = IO::InnerFile->new($fh, $start, $length);
while (<$inner>) {
...
}
=head1 DESCRIPTION
If you have a filehandle that can seek() and tell(), then you
can open an IO::InnerFile on a range of the underlying file.
=head1 PUBLIC INTERFACE
=over
=cut
use Symbol;
# The package version, both in 1.23 style *and* usable by MakeMaker:
$VERSION = "2.110";
#------------------------------
=item new FILEHANDLE, [START, [LENGTH]]
I
Create a new inner-file opened on the given FILEHANDLE,
from bytes START to START+LENGTH. Both START and LENGTH
default to 0; negative values are silently coerced to zero.
Note that FILEHANDLE must be able to seek() and tell(), in addition
to whatever other methods you may desire for reading it.
=cut
sub new {
my ($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');
}
#------------------------------
=item set_length LENGTH
=item get_length
=item add_length NBYTES
I
Get/set the virtual length of the inner file.
=cut
sub set_length { tied(${$_[0]})->{LG} = $_[1]; }
sub get_length { tied(${$_[0]})->{LG}; }
sub add_length { tied(${$_[0]})->{LG} += $_[1]; }
#------------------------------
=item set_start START
=item get_start
=item add_start NBYTES
I
Get/set the virtual start position of the inner file.
=cut
sub set_start { tied(${$_[0]})->{START} = $_[1]; }
sub get_start { tied(${$_[0]})->{START}; }
sub set_end { tied(${$_[0]})->{LG} = $_[1] - tied(${$_[0]})->{START}; }
sub get_end { tied(${$_[0]})->{LG} + tied(${$_[0]})->{START}; }
#------------------------------
=item binmode
=item close
=item flush
=item getc
=item getline
=item print LIST
=item printf LIST
=item read BUF, NBYTES
=item readline
=item seek OFFFSET, WHENCE
=item tell
=item write ARGS...
I
Standard filehandle methods.
=cut
sub write { shift->WRITE(@_) }
sub print { shift->PRINT(@_) }
sub printf { shift->PRINTF(@_) }
sub flush { "0 but true"; }
sub binmode { 1; }
sub getc { return GETC(tied(${$_[0]}) ); }
sub read { return READ( tied(${$_[0]}), @_[1,2,3] ); }
sub readline { return READLINE( tied(${$_[0]}) ); }
sub getline { return READLINE( tied(${$_[0]}) ); }
sub close { return CLOSE(tied(${$_[0]}) ); }
sub seek {
my ($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