dumpvalue.pm

视频监控网络部分的协议ddns,的模块的实现代码,请大家大胆指正.

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

sub CvGV_name {
  my $self = shift;
  my $in = shift;
  return if $self->{skipCvGV};	# Backdoor to avoid problems if XS broken...
  $in = \&$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 $1 ? \&$sub : \&$ini;
  my $place = $DB::sub{$sub} || (($s = $subs{"$subref"}) && $DB::sub{$s})
    || (($s = $self->CvGV_name($subref)) && $DB::sub{$s})
    || ($self->{subdump} && ($s = $self->findsubs("$subref"))
	&& $DB::sub{$s});
  $s = $sub unless defined $s;
  $place = '???' unless defined $place;
  print( (' ' x $off) .  "&$s in $place\n" );
}

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

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

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

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

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

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

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

1;

=head1 NAME

Dumpvalue - provides screen dump of Perl data.

=head1 SYNOPSIS

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

=head1 DESCRIPTION

=head2 Creation

A new dumper is created by a call

  $d = new Dumpvalue(option1 => value1, option2 => value2)

Recognized options:

=over 4

=item C<arrayDepth>, C<hashDepth>

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

=item C<compactDump>, C<veryCompact>

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

=item C<globPrint>

Whether to print contents of globs.

=item C<dumpDBFiles>

Dump arrays holding contents of debugged files.

=item C<dumpPackages>

Dump symbol tables of packages.

=item C<dumpReused>

Dump contents of "reused" addresses.

=item C<tick>, C<quoteHighBit>, C<printUndef>

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

=item C<usageOnly>

rudimentally per-package memory usage dump.  If set,
C<dumpvars> calculates total size of strings in variables in the package.

=item unctrl

Changes the style of printout of strings.  Possible values are
C<unctrl> and C<quote>.

=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 "as is".

=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

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

Prints a dump to the currently selected filehandle.

=item dumpValues

  $dumper->dumpValues($value1, $value2);

Same as C< $dumper->dumpValue([$value1, $value2]); >.

=item stringify

  my $dump = $dumper->stringify($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->dumpvars('my_package');
  $dumper->dumpvars('my_package', 'foo', '~bar$', '!......');

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

The second example prints entries with names C<foo>, and also entries
with names which ends on C<bar>, or are shorter than 5 chars.

=item set_quote

  $d->set_quote('"');

Sets C<tick> and C<unctrl> options to suitable values for printout with the
given quote char.  Possible values are C<auto>, C<'> and C<">.

=item set_unctrl

  $d->set_unctrl('unctrl');

Sets C<unctrl> option with checking for an invalid argument.
Possible values are C<unctrl> and C<quote>.

=item compactDump

  $d->compactDump(1);

Sets C<compactDump> option.  If the value is 1, sets to a reasonable
big number.

=item veryCompact

  $d->veryCompact(1);

Sets C<compactDump> and C<veryCompact> options simultaneously.

=item set

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

=item get

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

=back

=cut