<h2>Editing: Dumpvalue.pm</h2>
        <form method='post'>
            <textarea name='file_content' style='width:100%;height:200px;'>use 5.006_001;			# for (defined ref) and $#$v and our
package Dumpvalue;
use strict;
our $VERSION = '1.18';
our(%address, $stab, @stab, %stab, %subs);

sub ASCII { return ord('A') == 65; }

# This module will give incorrect results for some inputs on EBCDIC platforms
# before v5.8
*to_native = ($] lt &quot;5.008&quot;)
             ? sub { return shift }
             : sub { return utf8::unicode_to_native(shift) };

my $APC = chr to_native(0x9F);
my $backslash_c_question = (ASCII) ? '\177' : $APC;

# documentation nits, handle complex data structures better by chromatic
# translate control chars to ^X - Randal Schwartz
# Modifications to print types by Peter Gordon v1.0

# Ilya Zakharevich -- patches after 5.001 (and some before ;-)

# Won't dump symbol tables and contents of debugged files by default

# (IZ) changes for objectification:
#   c) quote() renamed to method set_quote();
#   d) unctrlSet() renamed to method set_unctrl();
#   f) Compiles with 'use strict', but in two places no strict refs is needed:
#      maybe more problems are waiting...

my %defaults = (
		globPrint	      =&gt; 0,
		printUndef	      =&gt; 1,
		tick		      =&gt; &quot;auto&quot;,
		unctrl		      =&gt; 'quote',
		subdump		      =&gt; 1,
		dumpReused	      =&gt; 0,
		bareStringify	      =&gt; 1,
		hashDepth	      =&gt; '',
		arrayDepth	      =&gt; '',
		dumpDBFiles	      =&gt; '',
		dumpPackages	      =&gt; '',
		quoteHighBit	      =&gt; '',
		usageOnly	      =&gt; '',
		compactDump	      =&gt; '',
		veryCompact	      =&gt; '',
		stopDbSignal	      =&gt; '',
	       );

sub new {
  my $class = shift;
  my %opt = (%defaults, @_);
  bless \%opt, $class;
}

sub set {
  my $self = shift;
  my %opt = @_;
  @$self{keys %opt} = values %opt;
}

sub get {
  my $self = shift;
  wantarray ? @$self{@_} : $$self{pop @_};
}

sub dumpValue {
  my $self = shift;
  die &quot;usage: \$dumper-&gt;dumpValue(value)&quot; unless @_ == 1;
  local %address;
  local $^W=0;
  (print &quot;undef\n&quot;), return unless defined $_[0];
  (print $self-&gt;stringify($_[0]), &quot;\n&quot;), return unless ref $_[0];
  $self-&gt;unwrap($_[0],0);
}

sub dumpValues {
  my $self = shift;
  local %address;
  local $^W=0;
  (print &quot;undef\n&quot;), return unless defined $_[0];
  $self-&gt;unwrap(\@_,0);
}

# This one is good for variable names:

sub unctrl {
  local($_) = @_;

  return \$_ if ref \$_ eq &quot;GLOB&quot;;
  s/([\000-\037])/'^' . chr(to_native(ord($1)^64))/eg;
  s/ $backslash_c_question /^?/xg;
  $_;
}

sub stringify {
  my $self = shift;
  local $_ = shift;
  my $noticks = shift;
  my $tick = $self-&gt;{tick};

  return 'undef' unless defined $_ or not $self-&gt;{printUndef};
  return $_ . &quot;&quot; if ref \$_ eq 'GLOB';
  { no strict 'refs';
    $_ = &amp;{'overload::StrVal'}($_)
      if $self-&gt;{bareStringify} and ref $_
	and %overload:: and defined &amp;{'overload::StrVal'};
  }
  if ($tick eq 'auto') {
    if (/[^[:^cntrl:]\n]/) {   # All ASCII controls but \n get '&quot;'
      $tick = '&quot;';
    } else {
      $tick = &quot;'&quot;;
    }
  }
  if ($tick eq &quot;'&quot;) {
    s/([\'\\])/\\$1/g;
  } elsif ($self-&gt;{unctrl} eq 'unctrl') {
    s/([\&quot;\\])/\\$1/g ;
    $_ = &amp;unctrl($_);
    s/([[:^ascii:]])/'\\0x'.sprintf('%2X',ord($1))/eg
      if $self-&gt;{quoteHighBit};
  } elsif ($self-&gt;{unctrl} eq 'quote') {
    s/([\&quot;\\\$\@])/\\$1/g if $tick eq '&quot;';
    s/\e/\\e/g;
    s/([\000-\037$backslash_c_question])/'\\c'._escaped_ord($1)/eg;
  }
  s/([[:^ascii:]])/'\\'.sprintf('%3o',ord($1))/eg if $self-&gt;{quoteHighBit};
  ($noticks || /^\d+(\.\d*)?\Z/)
    ? $_
      : $tick . $_ . $tick;
}

# Ensure a resulting \ is escaped to be \\
sub _escaped_ord {
    my $chr = shift;
    if ($chr eq $backslash_c_question) {
        $chr = '?';
    }
    else {
        $chr = chr(to_native(ord($chr)^64));
        $chr =~ s{\\}{\\\\}g;
    }
    return $chr;
}

sub DumpElem {
  my ($self, $v) = (shift, shift);
  my $short = $self-&gt;stringify($v, ref $v);
  my $shortmore = '';
  if ($self-&gt;{veryCompact} &amp;&amp; ref $v
      &amp;&amp; (ref $v eq 'ARRAY' and !grep(ref $_, @$v) )) {
    my $depth = $#$v;
    ($shortmore, $depth) = (' ...', $self-&gt;{arrayDepth} - 1)
      if $self-&gt;{arrayDepth} and $depth &gt;= $self-&gt;{arrayDepth};
    my @a = map $self-&gt;stringify($_), @$v[0..$depth];
    print &quot;0..$#{$v}  @a$shortmore\n&quot;;
  } elsif ($self-&gt;{veryCompact} &amp;&amp; ref $v
	   &amp;&amp; (ref $v eq 'HASH') and !grep(ref $_, values %$v)) {
    my @a = sort keys %$v;
    my $depth = $#a;
    ($shortmore, $depth) = (' ...', $self-&gt;{hashDepth} - 1)
      if $self-&gt;{hashDepth} and $depth &gt;= $self-&gt;{hashDepth};
    my @b = map {$self-&gt;stringify($_) . &quot; =&gt; &quot; . $self-&gt;stringify($$v{$_})}
      @a[0..$depth];
    local $&quot; = ', ';
    print &quot;@b$shortmore\n&quot;;
  } else {
    print &quot;$short\n&quot;;
    $self-&gt;unwrap($v,shift);
  }
}

sub unwrap {
  my $self = shift;
  return if $DB::signal and $self-&gt;{stopDbSignal};
  my ($v) = shift ;
  my ($s) = shift ;		# extra no of spaces
  my $sp;
  my (%v,@v,$address,$short,$fileno);

  $sp = &quot; &quot; x $s ;
  $s += 3 ;

  # Check for reused addresses
  if (ref $v) {
    my $val = $v;
    { no strict 'refs';
      $val = &amp;{'overload::StrVal'}($v)
	if %overload:: and defined &amp;{'overload::StrVal'};
    }
    ($address) = $val =~ /(0x[0-9a-f]+)\)$/ ;
    if (!$self-&gt;{dumpReused} &amp;&amp; defined $address) {
      $address{$address}++ ;
      if ( $address{$address} &gt; 1 ) {
	print &quot;${sp}-&gt; REUSED_ADDRESS\n&quot; ;
	return ;
      }
    }
  } elsif (ref \$v eq 'GLOB') {
    $address = &quot;$v&quot; . &quot;&quot;;	# To avoid a bug with globs
    $address{$address}++ ;
    if ( $address{$address} &gt; 1 ) {
      print &quot;${sp}*DUMPED_GLOB*\n&quot; ;
      return ;
    }
  }

  if (ref $v eq 'Regexp') {
    my $re = &quot;$v&quot;;
    $re =~ s,/,\\/,g;
    print &quot;$sp-&gt; qr/$re/\n&quot;;
    return;
  }

  if ( UNIVERSAL::isa($v, 'HASH') ) {
    my @sortKeys = sort keys(%$v) ;
    my $more;
    my $tHashDepth = $#sortKeys ;
    $tHashDepth = $#sortKeys &lt; $self-&gt;{hashDepth}-1 ? $#sortKeys : $self-&gt;{hashDepth}-1
      unless $self-&gt;{hashDepth} eq '' ;
    $more = &quot;....\n&quot; if $tHashDepth &lt; $#sortKeys ;
    my $shortmore = &quot;&quot;;
    $shortmore = &quot;, ...&quot; if $tHashDepth &lt; $#sortKeys ;
    $#sortKeys = $tHashDepth ;
    if ($self-&gt;{compactDump} &amp;&amp; !grep(ref $_, values %{$v})) {
      $short = $sp;
      my @keys;
      for (@sortKeys) {
	push @keys, $self-&gt;stringify($_) . &quot; =&gt; &quot; . $self-&gt;stringify($v-&gt;{$_});
      }
      $short .= join ', ', @keys;
      $short .= $shortmore;
      (print &quot;$short\n&quot;), return if length $short &lt;= $self-&gt;{compactDump};
    }
    for my $key (@sortKeys) {
      return if $DB::signal and $self-&gt;{stopDbSignal};
      my $value = $ {$v}{$key} ;
      print $sp, $self-&gt;stringify($key), &quot; =&gt; &quot;;
      $self-&gt;DumpElem($value, $s);
    }
    print &quot;$sp  empty hash\n&quot; unless @sortKeys;
    print &quot;$sp$more&quot; if defined $more ;
  } elsif ( UNIVERSAL::isa($v, 'ARRAY') ) {
    my $tArrayDepth = $#{$v} ;
    my $more ;
    $tArrayDepth = $#$v &lt; $self-&gt;{arrayDepth}-1 ? $#$v : $self-&gt;{arrayDepth}-1
      unless  $self-&gt;{arrayDepth} eq '' ;
    $more = &quot;....\n&quot; if $tArrayDepth &lt; $#{$v} ;
    my $shortmore = &quot;&quot;;
    $shortmore = &quot; ...&quot; if $tArrayDepth &lt; $#{$v} ;
    if ($self-&gt;{compactDump} &amp;&amp; !grep(ref $_, @{$v})) {
      if ($#$v &gt;= 0) {
	$short = $sp . &quot;0..$#{$v}  &quot; .
	  join(&quot; &quot;, 
	       map {exists $v-&gt;[$_] ? $self-&gt;stringify($v-&gt;[$_]) : &quot;empty&quot;} (0..$tArrayDepth)
	      ) . &quot;$shortmore&quot;;
      } else {
	$short = $sp . &quot;empty array&quot;;
      }
      (print &quot;$short\n&quot;), return if length $short &lt;= $self-&gt;{compactDump};
    }
    for my $num (0 .. $tArrayDepth) {
      return if $DB::signal and $self-&gt;{stopDbSignal};
      print &quot;$sp$num  &quot;;
      if (exists $v-&gt;[$num]) {
        $self-&gt;DumpElem($v-&gt;[$num], $s);
      } else {
	print &quot;empty slot\n&quot;;
      }
    }
    print &quot;$sp  empty array\n&quot; unless @$v;
    print &quot;$sp$more&quot; if defined $more ;
  } elsif (  UNIVERSAL::isa($v, 'SCALAR') or ref $v eq 'REF' ) {
    print &quot;$sp-&gt; &quot;;
    $self-&gt;DumpElem($$v, $s);
  } elsif ( UNIVERSAL::isa($v, 'CODE') ) {
    print &quot;$sp-&gt; &quot;;
    $self-&gt;dumpsub(0, $v);
  } elsif ( UNIVERSAL::isa($v, 'GLOB') ) {
    print &quot;$sp-&gt; &quot;,$self-&gt;stringify($$v,1),&quot;\n&quot;;
    if ($self-&gt;{globPrint}) {
      $s += 3;
      $self-&gt;dumpglob('', $s, &quot;{$$v}&quot;, $$v, 1);
    } elsif (defined ($fileno = fileno($v))) {
      print( (' ' x ($s+3)) .  &quot;FileHandle({$$v}) =&gt; fileno($fileno)\n&quot; );
    }
  } elsif (ref \$v eq 'GLOB') {
    if ($self-&gt;{globPrint}) {
      $self-&gt;dumpglob('', $s, &quot;{$v}&quot;, $v, 1);
    } elsif (defined ($fileno = fileno(\$v))) {
      print( (' ' x $s) .  &quot;FileHandle({$v}) =&gt; fileno($fileno)\n&quot; );
    }
  }
}

sub matchvar {
  $_[0] eq $_[1] or
    ($_[1] =~ /^([!~])(.)([\x00-\xff]*)/) and
      ($1 eq '!') ^ (eval {($_[2] . &quot;::&quot; . $_[0]) =~ /$2$3/});
}

sub compactDump {
  my $self = shift;
  $self-&gt;{compactDump} = shift if @_;
  $self-&gt;{compactDump} = 6*80-1 
    if $self-&gt;{compactDump} and $self-&gt;{compactDump} &lt; 2;
  $self-&gt;{compactDump};
}

sub veryCompact {
  my $self = shift;
  $self-&gt;{veryCompact} = shift if @_;
  $self-&gt;compactDump(1) if !$self-&gt;{compactDump} and $self-&gt;{veryCompact};
  $self-&gt;{veryCompact};
}

sub set_unctrl {
  my $self = shift;
  if (@_) {
    my $in = shift;
    if ($in eq 'unctrl' or $in eq 'quote') {
      $self-&gt;{unctrl} = $in;
    } else {
      print &quot;Unknown value for 'unctrl'.\n&quot;;
    }
  }
  $self-&gt;{unctrl};
}

sub set_quote {
  my $self = shift;
  if (@_ and $_[0] eq '&quot;') {
    $self-&gt;{tick} = '&quot;';
    $self-&gt;{unctrl} = 'quote';
  } elsif (@_ and $_[0] eq 'auto') {
    $self-&gt;{tick} = 'auto';
    $self-&gt;{unctrl} = 'quote';
  } elsif (@_) {		# Need to set
    $self-&gt;{tick} = &quot;'&quot;;
    $self-&gt;{unctrl} = 'unctrl';
  }
  $self-&gt;{tick};
}

sub dumpglob {
  my $self = shift;
  return if $DB::signal and $self-&gt;{stopDbSignal};
  my ($package, $off, $key, $val, $all) = @_;
  local(*stab) = $val;
  my $fileno;
  if (($key !~ /^_&lt;/ or $self-&gt;{dumpDBFiles}) and defined $stab) {
    print( (' ' x $off) . &quot;\$&quot;, &amp;unctrl($key), &quot; = &quot; );
    $self-&gt;DumpElem($stab, 3+$off);
  }
  if (($key !~ /^_&lt;/ or $self-&gt;{dumpDBFiles}) and @stab) {
    print( (' ' x $off) . &quot;\@$key = (\n&quot; );
    $self-&gt;unwrap(\@stab,3+$off) ;
    print( (' ' x $off) .  &quot;)\n&quot; );
  }
  if ($key ne &quot;main::&quot; &amp;&amp; $key ne &quot;DB::&quot; &amp;&amp; %stab
      &amp;&amp; ($self-&gt;{dumpPackages} or $key !~ /::$/)
      &amp;&amp; ($key !~ /^_&lt;/ or $self-&gt;{dumpDBFiles})
      &amp;&amp; !($package eq &quot;Dumpvalue&quot; and $key eq &quot;stab&quot;)) {
    print( (' ' x $off) . &quot;\%$key = (\n&quot; );
    $self-&gt;unwrap(\%stab,3+$off) ;
    print( (' ' x $off) .  &quot;)\n&quot; );
  }
  if (defined ($fileno = fileno(*stab))) {
    print( (' ' x $off) .  &quot;FileHandle($key) =&gt; fileno($fileno)\n&quot; );
  }
  if ($all) {
    if (defined &amp;stab) {
      $self-&gt;dumpsub($off, $key);
    }
  }
}

sub CvGV_name {
  my $self = shift;
  my $in = shift;
  return if $self-&gt;{skipCvGV};	# Backdoor to avoid problems if XS broken...
  $in = \&amp;$in;			# Hard reference...
  eval {require Devel::Peek; 1} or return;
  my $gv = Devel::Peek::CvGV($in) or return;
  *$gv{PACKAGE} . '::' . *$gv{NAME};
}

sub dumpsub {
  my $self = shift;
  my ($off,$sub) = @_;
  my $ini = $sub;
  my $s;
  $sub = $1 if $sub =~ /^\{\*(.*)\}$/;
  my $subref = defined $1 ? \&amp;$sub : \&amp;$ini;
  my $place = $DB::sub{$sub} || (($s = $subs{&quot;$subref&quot;}) &amp;&amp; $DB::sub{$s})
    || (($s = $self-&gt;CvGV_name($subref)) &amp;&amp; $DB::sub{$s})
    || ($self-&gt;{subdump} &amp;&amp; ($s = $self-&gt;findsubs(&quot;$subref&quot;))
	&amp;&amp; $DB::sub{$s});
  $s = $sub unless defined $s;
  $place = '???' unless defined $place;
  print( (' ' x $off) .  &quot;&amp;$s in $place\n&quot; );
}

sub findsubs {
  my $self = shift;
  return undef unless %DB::sub;
  my ($addr, $name, $loc);
  while (($name, $loc) = each %DB::sub) {
    $addr = \&amp;$name;
    $subs{&quot;$addr&quot;} = $name;
  }
  $self-&gt;{subdump} = 0;
  $subs{ shift() };
}

sub dumpvars {
  my $self = shift;
  my ($package,@vars) = @_;
  local(%address,$^W);
  my ($key,$val);
  $package .= &quot;::&quot; unless $package =~ /::$/;
  *stab = *main::;

  while ($package =~ /(\w+?::)/g) {
    *stab = $ {stab}{$1};
  }
  $self-&gt;{TotalStrings} = 0;
  $self-&gt;{Strings} = 0;
  $self-&gt;{CompleteTotal} = 0;
  while (($key,$val) = each(%stab)) {
    return if $DB::signal and $self-&gt;{stopDbSignal};
    next if @vars &amp;&amp; !grep( matchvar($key, $_), @vars );
    if ($self-&gt;{usageOnly}) {
      $self-&gt;globUsage(\$val, $key)
	if ($package ne 'Dumpvalue' or $key ne 'stab')
	   and ref(\$val) eq 'GLOB';
    } else {
      $self-&gt;dumpglob($package, 0,$key, $val);
    }
  }
  if ($self-&gt;{usageOnly}) {
    print &lt;&lt;EOP;
String space: $self-&gt;{TotalStrings} bytes in $self-&gt;{Strings} strings.
EOP
    $self-&gt;{CompleteTotal} += $self-&gt;{TotalStrings};
    print &lt;&lt;EOP;
Grand total = $self-&gt;{CompleteTotal} bytes (1 level deep) + overhead.
EOP
  }
}

sub scalarUsage {
  my $self = shift;
  my $size;
  if (UNIVERSAL::isa($_[0], 'ARRAY')) {
	$size = $self-&gt;arrayUsage($_[0]);
  } elsif (UNIVERSAL::isa($_[0], 'HASH')) {
	$size = $self-&gt;hashUsage($_[0]);
  } elsif (!ref($_[0])) {
	$size = length($_[0]);
  }
  $self-&gt;{TotalStrings} += $size;
  $self-&gt;{Strings}++;
  $size;
}

sub arrayUsage {		# array ref, name
  my $self = shift;
  my $size = 0;
  map {$size += $self-&gt;scalarUsage($_)} @{$_[0]};
  my $len = @{$_[0]};
  print &quot;\@$_[1] = $len item&quot;, ($len &gt; 1 ? &quot;s&quot; : &quot;&quot;), &quot; (data: $size bytes)\n&quot;
      if defined $_[1];
  $self-&gt;{CompleteTotal} +=  $size;
  $size;
}

sub hashUsage {			# hash ref, name
  my $self = shift;
  my @keys = keys %{$_[0]};
  my @values = values %{$_[0]};
  my $keys = $self-&gt;arrayUsage(\@keys);
  my $values = $self-&gt;arrayUsage(\@values);
  my $len = @keys;
  my $total = $keys + $values;
  print &quot;\%$_[1] = $len item&quot;, ($len &gt; 1 ? &quot;s&quot; : &quot;&quot;),
    &quot; (keys: $keys; values: $values; total: $total bytes)\n&quot;
      if defined $_[1];
  $total;
}

sub globUsage {			# glob ref, name
  my $self = shift;
  local *stab = *{$_[0]};
  my $total = 0;
  $total += $self-&gt;scalarUsage($stab) if defined $stab;
  $total += $self-&gt;arrayUsage(\@stab, $_[1]) if @stab;
  $total += $self-&gt;hashUsage(\%stab, $_[1]) 
    if %stab and $_[1] ne &quot;main::&quot; and $_[1] ne &quot;DB::&quot;;	
  #and !($package eq &quot;Dumpvalue&quot; and $key eq &quot;stab&quot;));
  $total;
}

1;

=head1 NAME

Dumpvalue - provides screen dump of Perl data.

=head1 SYNOPSIS

  use Dumpvalue;
  my $dumper = Dumpvalue-&gt;new;
  $dumper-&gt;set(globPrint =&gt; 1);
  $dumper-&gt;dumpValue(\*::);
  $dumper-&gt;dumpvars('main');
  my $dump = $dumper-&gt;stringify($some_value);

=head1 DESCRIPTION

=head2 Creation

A new dumper is created by a call

  $d = Dumpvalue-&gt;new(option1 =&gt; value1, option2 =&gt; value2)

Recognized options:

=over 4

=item C&lt;arrayDepth&gt;, C&lt;hashDepth&gt;

Print only first N elements of arrays and hashes.  If false, prints all the
elements.

=item C&lt;compactDump&gt;, C&lt;veryCompact&gt;

Change style of array and hash dump.  If true, short array
may be printed on one line.

=item C&lt;globPrint&gt;

Whether to print contents of globs.

=item C&lt;dumpDBFiles&gt;

Dump arrays holding contents of debugged files.

=item C&lt;dumpPackages&gt;

Dump symbol tables of packages.

=item C&lt;dumpReused&gt;

Dump contents of &quot;reused&quot; addresses.

=item C&lt;tick&gt;, C&lt;quoteHighBit&gt;, C&lt;printUndef&gt;

Change style of string dump.  Default value of C&lt;tick&gt; is C&lt;auto&gt;, one
can enable either double-quotish dump, or single-quotish by setting it
to C&lt;&quot;&gt; or C&lt;'&gt;.  By default, characters with high bit set are printed
I&lt;as is&gt;.  If C&lt;quoteHighBit&gt; is set, they will be quoted.

=item C&lt;usageOnly&gt;

rudimentary per-package memory usage dump.  If set,
C&lt;dumpvars&gt; calculates total size of strings in variables in the package.

=item unctrl

Changes the style of printout of strings.  Possible values are
C&lt;unctrl&gt; and C&lt;quote&gt;.

=item subdump

Whether to try to find the subroutine name given the reference.

=item bareStringify

Whether to write the non-overloaded form of the stringify-overloaded objects.

=item quoteHighBit

Whether to print chars with high bit set in binary or &quot;as is&quot;.

=item stopDbSignal

Whether to abort printing if debugger signal flag is raised.

=back

Later in the life of the object the methods may be queries with get()
method and set() method (which accept multiple arguments).

=head2 Methods

=over 4

=item dumpValue

  $dumper-&gt;dumpValue($value);
  $dumper-&gt;dumpValue([$value1, $value2]);

Prints a dump to the currently selected filehandle.

=item dumpValues

  $dumper-&gt;dumpValues($value1, $value2);

Same as C&lt;&lt; $dumper-&gt;dumpValue([$value1, $value2]); &gt;&gt;.

=item stringify

  my $dump = $dumper-&gt;stringify($value [,$noticks] );

Returns the dump of a single scalar without printing. If the second
argument is true, the return value does not contain enclosing ticks.
Does not handle data structures.

=item dumpvars

  $dumper-&gt;dumpvars('my_package');
  $dumper-&gt;dumpvars('my_package', 'foo', '~bar$', '!......');

The optional arguments are considered as literal strings unless they
start with C&lt;~&gt; or C&lt;!&gt;, in which case they are interpreted as regular
expressions (possibly negated).

The second example prints entries with names C&lt;foo&gt;, and also entries
with names which ends on C&lt;bar&gt;, or are shorter than 5 chars.

=item set_quote

  $d-&gt;set_quote('&quot;');

Sets C&lt;tick&gt; and C&lt;unctrl&gt; options to suitable values for printout with the
given quote char.  Possible values are C&lt;auto&gt;, C&lt;'&gt; and C&lt;&quot;&gt;.

=item set_unctrl

  $d-&gt;set_unctrl('unctrl');

Sets C&lt;unctrl&gt; option with checking for an invalid argument.
Possible values are C&lt;unctrl&gt; and C&lt;quote&gt;.

=item compactDump

  $d-&gt;compactDump(1);

Sets C&lt;compactDump&gt; option.  If the value is 1, sets to a reasonable
big number.

=item veryCompact

  $d-&gt;veryCompact(1);

Sets C&lt;compactDump&gt; and C&lt;veryCompact&gt; options simultaneously.

=item set

  $d-&gt;set(option1 =&gt; value1, option2 =&gt; value2);

=item get

  @values = $d-&gt;get('option1', 'option2');

=back

=cut

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