use B::Assembler qw(assemble_fh);use FileHandle;my ($filename, $fh, $out);if ($ARGV[0] eq "-d") {    B::Assembler::debug(1);    shift;}$out = \*STDOUT;if (@ARGV == 0) {    $fh = \*STDIN;    $filename = "-";} elsif (@ARGV == 1) {    $filename = $ARGV[0];    $fh = new FileHandle "<$filename";} elsif (@ARGV == 2) {    $filename = $ARGV[0];    $fh = new FileHandle "<$filename";    $out = new FileHandle ">$ARGV[1]";} else {    die "Usage: assemble [filename] [outfilename]\n";}binmode $out;$SIG{__WARN__} = sub { warn "$filename:@_" };$SIG{__DIE__} = sub { die "$filename: @_" };assemble_fh($fh, sub { print $out @_ });