mirror of
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627 lines
16 KiB
Perl
627 lines
16 KiB
Perl
use 5.005_64; # for (defined ref) and $#$v and our
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package Dumpvalue;
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use strict;
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our(%address, $stab, @stab, %stab, %subs);
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# translate control chars to ^X - Randal Schwartz
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# Modifications to print types by Peter Gordon v1.0
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# Ilya Zakharevich -- patches after 5.001 (and some before ;-)
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# Won't dump symbol tables and contents of debugged files by default
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# (IZ) changes for objectification:
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# c) quote() renamed to method set_quote();
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# d) unctrlSet() renamed to method set_unctrl();
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# f) Compiles with `use strict', but in two places no strict refs is needed:
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# maybe more problems are waiting...
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my %defaults = (
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globPrint => 0,
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printUndef => 1,
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tick => "auto",
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unctrl => 'quote',
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subdump => 1,
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dumpReused => 0,
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bareStringify => 1,
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hashDepth => '',
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arrayDepth => '',
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dumpDBFiles => '',
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dumpPackages => '',
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quoteHighBit => '',
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usageOnly => '',
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compactDump => '',
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veryCompact => '',
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stopDbSignal => '',
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);
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sub new {
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my $class = shift;
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my %opt = (%defaults, @_);
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bless \%opt, $class;
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}
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sub set {
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my $self = shift;
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my %opt = @_;
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@$self{keys %opt} = values %opt;
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}
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sub get {
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my $self = shift;
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wantarray ? @$self{@_} : $$self{pop @_};
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}
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sub dumpValue {
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my $self = shift;
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die "usage: \$dumper->dumpValue(value)" unless @_ == 1;
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local %address;
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local $^W=0;
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(print "undef\n"), return unless defined $_[0];
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(print $self->stringify($_[0]), "\n"), return unless ref $_[0];
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$self->unwrap($_[0],0);
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}
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sub dumpValues {
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my $self = shift;
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local %address;
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local $^W=0;
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(print "undef\n"), return unless defined $_[0];
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$self->unwrap(\@_,0);
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}
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# This one is good for variable names:
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sub unctrl {
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local($_) = @_;
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return \$_ if ref \$_ eq "GLOB";
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s/([\001-\037\177])/'^'.pack('c',ord($1)^64)/eg;
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$_;
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}
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sub stringify {
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my $self = shift;
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local $_ = shift;
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my $noticks = shift;
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my $tick = $self->{tick};
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return 'undef' unless defined $_ or not $self->{printUndef};
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return $_ . "" if ref \$_ eq 'GLOB';
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{ no strict 'refs';
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$_ = &{'overload::StrVal'}($_)
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if $self->{bareStringify} and ref $_
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and %overload:: and defined &{'overload::StrVal'};
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}
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if ($tick eq 'auto') {
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if (/[\000-\011\013-\037\177]/) {
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$tick = '"';
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} else {
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$tick = "'";
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}
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}
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if ($tick eq "'") {
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s/([\'\\])/\\$1/g;
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} elsif ($self->{unctrl} eq 'unctrl') {
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s/([\"\\])/\\$1/g ;
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s/([\000-\037\177])/'^'.pack('c',ord($1)^64)/eg;
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s/([\200-\377])/'\\0x'.sprintf('%2X',ord($1))/eg
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if $self->{quoteHighBit};
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} elsif ($self->{unctrl} eq 'quote') {
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s/([\"\\\$\@])/\\$1/g if $tick eq '"';
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s/\033/\\e/g;
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s/([\000-\037\177])/'\\c'.chr(ord($1)^64)/eg;
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}
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s/([\200-\377])/'\\'.sprintf('%3o',ord($1))/eg if $self->{quoteHighBit};
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($noticks || /^\d+(\.\d*)?\Z/)
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? $_
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: $tick . $_ . $tick;
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}
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sub DumpElem {
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my ($self, $v) = (shift, shift);
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my $short = $self->stringify($v, ref $v);
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my $shortmore = '';
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if ($self->{veryCompact} && ref $v
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&& (ref $v eq 'ARRAY' and !grep(ref $_, @$v) )) {
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my $depth = $#$v;
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($shortmore, $depth) = (' ...', $self->{arrayDepth} - 1)
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if $self->{arrayDepth} and $depth >= $self->{arrayDepth};
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my @a = map $self->stringify($_), @$v[0..$depth];
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print "0..$#{$v} @a$shortmore\n";
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} elsif ($self->{veryCompact} && ref $v
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&& (ref $v eq 'HASH') and !grep(ref $_, values %$v)) {
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my @a = sort keys %$v;
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my $depth = $#a;
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($shortmore, $depth) = (' ...', $self->{hashDepth} - 1)
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if $self->{hashDepth} and $depth >= $self->{hashDepth};
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my @b = map {$self->stringify($_) . " => " . $self->stringify($$v{$_})}
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@a[0..$depth];
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local $" = ', ';
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print "@b$shortmore\n";
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} else {
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print "$short\n";
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$self->unwrap($v,shift);
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}
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}
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sub unwrap {
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my $self = shift;
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return if $DB::signal and $self->{stopDbSignal};
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my ($v) = shift ;
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my ($s) = shift ; # extra no of spaces
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my $sp;
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my (%v,@v,$address,$short,$fileno);
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$sp = " " x $s ;
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$s += 3 ;
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# Check for reused addresses
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if (ref $v) {
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my $val = $v;
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{ no strict 'refs';
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$val = &{'overload::StrVal'}($v)
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if %overload:: and defined &{'overload::StrVal'};
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}
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($address) = $val =~ /(0x[0-9a-f]+)\)$/ ;
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if (!$self->{dumpReused} && defined $address) {
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$address{$address}++ ;
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if ( $address{$address} > 1 ) {
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print "${sp}-> REUSED_ADDRESS\n" ;
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return ;
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}
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}
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} elsif (ref \$v eq 'GLOB') {
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$address = "$v" . ""; # To avoid a bug with globs
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$address{$address}++ ;
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if ( $address{$address} > 1 ) {
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print "${sp}*DUMPED_GLOB*\n" ;
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return ;
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}
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}
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if (ref $v eq 'Regexp') {
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my $re = "$v";
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$re =~ s,/,\\/,g;
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print "$sp-> qr/$re/\n";
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return;
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}
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if ( UNIVERSAL::isa($v, 'HASH') ) {
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my @sortKeys = sort keys(%$v) ;
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my $more;
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my $tHashDepth = $#sortKeys ;
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$tHashDepth = $#sortKeys < $self->{hashDepth}-1 ? $#sortKeys : $self->{hashDepth}-1
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unless $self->{hashDepth} eq '' ;
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$more = "....\n" if $tHashDepth < $#sortKeys ;
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my $shortmore = "";
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$shortmore = ", ..." if $tHashDepth < $#sortKeys ;
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$#sortKeys = $tHashDepth ;
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if ($self->{compactDump} && !grep(ref $_, values %{$v})) {
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$short = $sp;
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my @keys;
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for (@sortKeys) {
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push @keys, $self->stringify($_) . " => " . $self->stringify($v->{$_});
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}
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$short .= join ', ', @keys;
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$short .= $shortmore;
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(print "$short\n"), return if length $short <= $self->{compactDump};
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}
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for my $key (@sortKeys) {
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return if $DB::signal and $self->{stopDbSignal};
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my $value = $ {$v}{$key} ;
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print $sp, $self->stringify($key), " => ";
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$self->DumpElem($value, $s);
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}
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print "$sp empty hash\n" unless @sortKeys;
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print "$sp$more" if defined $more ;
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} elsif ( UNIVERSAL::isa($v, 'ARRAY') ) {
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my $tArrayDepth = $#{$v} ;
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my $more ;
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$tArrayDepth = $#$v < $self->{arrayDepth}-1 ? $#$v : $self->{arrayDepth}-1
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unless $self->{arrayDepth} eq '' ;
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$more = "....\n" if $tArrayDepth < $#{$v} ;
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my $shortmore = "";
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$shortmore = " ..." if $tArrayDepth < $#{$v} ;
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if ($self->{compactDump} && !grep(ref $_, @{$v})) {
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if ($#$v >= 0) {
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$short = $sp . "0..$#{$v} " .
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join(" ",
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map {exists $v->[$_] ? $self->stringify($v->[$_]) : "empty"} ($[..$tArrayDepth)
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) . "$shortmore";
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} else {
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$short = $sp . "empty array";
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}
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(print "$short\n"), return if length $short <= $self->{compactDump};
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}
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for my $num ($[ .. $tArrayDepth) {
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return if $DB::signal and $self->{stopDbSignal};
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print "$sp$num ";
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if (exists $v->[$num]) {
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$self->DumpElem($v->[$num], $s);
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} else {
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print "empty slot\n";
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}
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}
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print "$sp empty array\n" unless @$v;
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print "$sp$more" if defined $more ;
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} elsif ( UNIVERSAL::isa($v, 'SCALAR') or ref $v eq 'REF' ) {
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print "$sp-> ";
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$self->DumpElem($$v, $s);
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} elsif ( UNIVERSAL::isa($v, 'CODE') ) {
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print "$sp-> ";
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$self->dumpsub(0, $v);
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} elsif ( UNIVERSAL::isa($v, 'GLOB') ) {
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print "$sp-> ",$self->stringify($$v,1),"\n";
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if ($self->{globPrint}) {
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$s += 3;
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$self->dumpglob('', $s, "{$$v}", $$v, 1);
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} elsif (defined ($fileno = fileno($v))) {
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print( (' ' x ($s+3)) . "FileHandle({$$v}) => fileno($fileno)\n" );
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}
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} elsif (ref \$v eq 'GLOB') {
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if ($self->{globPrint}) {
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$self->dumpglob('', $s, "{$v}", $v, 1);
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} elsif (defined ($fileno = fileno(\$v))) {
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print( (' ' x $s) . "FileHandle({$v}) => fileno($fileno)\n" );
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}
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}
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}
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sub matchvar {
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$_[0] eq $_[1] or
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($_[1] =~ /^([!~])(.)([\x00-\xff]*)/) and
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($1 eq '!') ^ (eval {($_[2] . "::" . $_[0]) =~ /$2$3/});
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}
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sub compactDump {
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my $self = shift;
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$self->{compactDump} = shift if @_;
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$self->{compactDump} = 6*80-1
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if $self->{compactDump} and $self->{compactDump} < 2;
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$self->{compactDump};
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}
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sub veryCompact {
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my $self = shift;
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$self->{veryCompact} = shift if @_;
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$self->compactDump(1) if !$self->{compactDump} and $self->{veryCompact};
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$self->{veryCompact};
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}
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sub set_unctrl {
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my $self = shift;
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if (@_) {
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my $in = shift;
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if ($in eq 'unctrl' or $in eq 'quote') {
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$self->{unctrl} = $in;
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} else {
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print "Unknown value for `unctrl'.\n";
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}
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}
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$self->{unctrl};
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}
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sub set_quote {
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my $self = shift;
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if (@_ and $_[0] eq '"') {
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$self->{tick} = '"';
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$self->{unctrl} = 'quote';
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} elsif (@_ and $_[0] eq 'auto') {
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$self->{tick} = 'auto';
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$self->{unctrl} = 'quote';
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} elsif (@_) { # Need to set
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$self->{tick} = "'";
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$self->{unctrl} = 'unctrl';
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}
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$self->{tick};
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}
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sub dumpglob {
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my $self = shift;
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return if $DB::signal and $self->{stopDbSignal};
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my ($package, $off, $key, $val, $all) = @_;
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local(*stab) = $val;
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my $fileno;
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if (($key !~ /^_</ or $self->{dumpDBFiles}) and defined $stab) {
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print( (' ' x $off) . "\$", &unctrl($key), " = " );
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$self->DumpElem($stab, 3+$off);
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}
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if (($key !~ /^_</ or $self->{dumpDBFiles}) and @stab) {
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print( (' ' x $off) . "\@$key = (\n" );
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$self->unwrap(\@stab,3+$off) ;
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print( (' ' x $off) . ")\n" );
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}
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if ($key ne "main::" && $key ne "DB::" && %stab
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&& ($self->{dumpPackages} or $key !~ /::$/)
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&& ($key !~ /^_</ or $self->{dumpDBFiles})
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&& !($package eq "Dumpvalue" and $key eq "stab")) {
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print( (' ' x $off) . "\%$key = (\n" );
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$self->unwrap(\%stab,3+$off) ;
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print( (' ' x $off) . ")\n" );
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}
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if (defined ($fileno = fileno(*stab))) {
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print( (' ' x $off) . "FileHandle($key) => fileno($fileno)\n" );
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}
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if ($all) {
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if (defined &stab) {
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$self->dumpsub($off, $key);
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}
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}
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}
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sub CvGV_name {
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my $self = shift;
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my $in = shift;
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return if $self->{skipCvGV}; # Backdoor to avoid problems if XS broken...
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$in = \&$in; # Hard reference...
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eval {require Devel::Peek; 1} or return;
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my $gv = Devel::Peek::CvGV($in) or return;
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*$gv{PACKAGE} . '::' . *$gv{NAME};
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}
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sub dumpsub {
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my $self = shift;
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my ($off,$sub) = @_;
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my $ini = $sub;
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my $s;
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$sub = $1 if $sub =~ /^\{\*(.*)\}$/;
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my $subref = defined $1 ? \&$sub : \&$ini;
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my $place = $DB::sub{$sub} || (($s = $subs{"$subref"}) && $DB::sub{$s})
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|| (($s = $self->CvGV_name($subref)) && $DB::sub{$s})
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|| ($self->{subdump} && ($s = $self->findsubs("$subref"))
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&& $DB::sub{$s});
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$s = $sub unless defined $s;
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$place = '???' unless defined $place;
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print( (' ' x $off) . "&$s in $place\n" );
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}
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sub findsubs {
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my $self = shift;
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return undef unless %DB::sub;
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my ($addr, $name, $loc);
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while (($name, $loc) = each %DB::sub) {
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$addr = \&$name;
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$subs{"$addr"} = $name;
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}
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$self->{subdump} = 0;
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$subs{ shift() };
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}
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sub dumpvars {
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my $self = shift;
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my ($package,@vars) = @_;
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local(%address,$^W);
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my ($key,$val);
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$package .= "::" unless $package =~ /::$/;
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*stab = *main::;
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while ($package =~ /(\w+?::)/g) {
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*stab = $ {stab}{$1};
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}
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$self->{TotalStrings} = 0;
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$self->{Strings} = 0;
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$self->{CompleteTotal} = 0;
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while (($key,$val) = each(%stab)) {
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return if $DB::signal and $self->{stopDbSignal};
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next if @vars && !grep( matchvar($key, $_), @vars );
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if ($self->{usageOnly}) {
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$self->globUsage(\$val, $key)
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if ($package ne 'Dumpvalue' or $key ne 'stab')
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and ref(\$val) eq 'GLOB';
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} else {
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$self->dumpglob($package, 0,$key, $val);
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}
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}
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if ($self->{usageOnly}) {
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print <<EOP;
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String space: $self->{TotalStrings} bytes in $self->{Strings} strings.
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EOP
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$self->{CompleteTotal} += $self->{TotalStrings};
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print <<EOP;
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Grand total = $self->{CompleteTotal} bytes (1 level deep) + overhead.
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EOP
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}
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}
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sub scalarUsage {
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my $self = shift;
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my $size = length($_[0]);
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$self->{TotalStrings} += $size;
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$self->{Strings}++;
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$size;
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}
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sub arrayUsage { # array ref, name
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my $self = shift;
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my $size = 0;
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map {$size += $self->scalarUsage($_)} @{$_[0]};
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my $len = @{$_[0]};
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print "\@$_[1] = $len item", ($len > 1 ? "s" : ""), " (data: $size bytes)\n"
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if defined $_[1];
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$self->{CompleteTotal} += $size;
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$size;
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}
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sub hashUsage { # hash ref, name
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my $self = shift;
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my @keys = keys %{$_[0]};
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my @values = values %{$_[0]};
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my $keys = $self->arrayUsage(\@keys);
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my $values = $self->arrayUsage(\@values);
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my $len = @keys;
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my $total = $keys + $values;
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print "\%$_[1] = $len item", ($len > 1 ? "s" : ""),
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" (keys: $keys; values: $values; total: $total bytes)\n"
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if defined $_[1];
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$total;
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}
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sub globUsage { # glob ref, name
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my $self = shift;
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local *stab = *{$_[0]};
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my $total = 0;
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$total += $self->scalarUsage($stab) if defined $stab;
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$total += $self->arrayUsage(\@stab, $_[1]) if @stab;
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$total += $self->hashUsage(\%stab, $_[1])
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if %stab and $_[1] ne "main::" and $_[1] ne "DB::";
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#and !($package eq "Dumpvalue" and $key eq "stab"));
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$total;
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}
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1;
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=head1 NAME
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Dumpvalue - provides screen dump of Perl data.
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=head1 SYNOPSIS
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use Dumpvalue;
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my $dumper = new Dumpvalue;
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$dumper->set(globPrint => 1);
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$dumper->dumpValue(\*::);
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$dumper->dumpvars('main');
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=head1 DESCRIPTION
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=head2 Creation
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A new dumper is created by a call
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$d = new Dumpvalue(option1 => value1, option2 => value2)
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Recognized options:
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=over
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=item C<arrayDepth>, C<hashDepth>
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Print only first N elements of arrays and hashes. If false, prints all the
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elements.
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=item C<compactDump>, C<veryCompact>
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Change style of array and hash dump. If true, short array
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may be printed on one line.
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=item C<globPrint>
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Whether to print contents of globs.
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=item C<DumpDBFiles>
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Dump arrays holding contents of debugged files.
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=item C<DumpPackages>
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Dump symbol tables of packages.
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=item C<DumpReused>
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Dump contents of "reused" addresses.
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=item C<tick>, C<HighBit>, C<printUndef>
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Change style of string dump. Default value of C<tick> is C<auto>, one
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can enable either double-quotish dump, or single-quotish by setting it
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to C<"> or C<'>. By default, characters with high bit set are printed
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I<as is>.
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=item C<UsageOnly>
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I<very> rudimentally per-package memory usage dump. If set,
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C<dumpvars> calculates total size of strings in variables in the package.
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=item unctrl
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Changes the style of printout of strings. Possible values are
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C<unctrl> and C<quote>.
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=item subdump
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Whether to try to find the subroutine name given the reference.
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=item bareStringify
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Whether to write the non-overloaded form of the stringify-overloaded objects.
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=item quoteHighBit
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Whether to print chars with high bit set in binary or "as is".
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=item stopDbSignal
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Whether to abort printing if debugger signal flag is raised.
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=back
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Later in the life of the object the methods may be queries with get()
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method and set() method (which accept multiple arguments).
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=head2 Methods
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=over
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=item dumpValue
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$dumper->dumpValue($value);
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$dumper->dumpValue([$value1, $value2]);
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=item dumpValues
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$dumper->dumpValues($value1, $value2);
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=item dumpvars
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$dumper->dumpvars('my_package');
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$dumper->dumpvars('my_package', 'foo', '~bar$', '!......');
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The optional arguments are considered as literal strings unless they
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start with C<~> or C<!>, in which case they are interpreted as regular
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expressions (possibly negated).
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The second example prints entries with names C<foo>, and also entries
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with names which ends on C<bar>, or are shorter than 5 chars.
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=item set_quote
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$d->set_quote('"');
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Sets C<tick> and C<unctrl> options to suitable values for printout with the
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given quote char. Possible values are C<auto>, C<'> and C<">.
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=item set_unctrl
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$d->set_unctrl('"');
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Sets C<unctrl> option with checking for an invalid argument.
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Possible values are C<unctrl> and C<quote>.
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=item compactDump
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$d->compactDump(1);
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Sets C<compactDump> option. If the value is 1, sets to a reasonable
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big number.
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=item veryCompact
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$d->veryCompact(1);
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Sets C<compactDump> and C<veryCompact> options simultaneously.
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=item set
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$d->set(option1 => value1, option2 => value2);
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=item get
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@values = $d->get('option1', 'option2');
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=back
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=cut
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