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use 5.006_001; # for (defined ref) and $#$v and our package Dumpvalue; use strict; use warnings; our $VERSION = '1.21'; 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 "5.008") ? 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 => 0, printUndef => 1, tick => "auto", unctrl => 'quote', subdump => 1, dumpReused => 0, bareStringify => 1, hashDepth => '', arrayDepth => '', dumpDBFiles => '', dumpPackages => '', quoteHighBit => '', usageOnly => '', compactDump => '', veryCompact => '', stopDbSignal => '', ); 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 "usage: \$dumper->dumpValue(value)" unless @_ == 1; local %address; local $^W=0; (print "undef\n"), return unless defined $_[0]; (print $self->stringify($_[0]), "\n"), return unless ref $_[0]; $self->unwrap($_[0],0); } sub dumpValues { my $self = shift; local %address; local $^W=0; (print "undef\n"), return if (@_ == 1 and not defined $_[0]); $self->unwrap(\@_,0); } # This one is good for variable names: sub unctrl { local($_) = @_; return \$_ if ref \$_ eq "GLOB"; 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->{tick}; return 'undef' unless defined $_ or not $self->{printUndef}; $_ = '' if not defined $_; return $_ . "" if ref \$_ eq 'GLOB'; { no strict 'refs'; $_ = &{'overload::StrVal'}($_) if $self->{bareStringify} and ref $_ and %overload:: and defined &{'overload::StrVal'}; } if ($tick eq 'auto') { if (/[^[:^cntrl:]\n]/) { # All ASCII controls but \n get '"' $tick = '"'; } else { $tick = "'"; } } if ($tick eq "'") { s/([\'\\])/\\$1/g; } elsif ($self->{unctrl} eq 'unctrl') { s/([\"\\])/\\$1/g ; $_ = &unctrl($_); s/([[:^ascii:]])/'\\0x'.sprintf('%2X',ord($1))/eg if $self->{quoteHighBit}; } elsif ($self->{unctrl} eq 'quote') { s/([\"\\\$\@])/\\$1/g if $tick eq '"'; s/\e/\\e/g; s/([\000-\037$backslash_c_question])/'\\c'._escaped_ord($1)/eg; } s/([[:^ascii:]])/'\\'.sprintf('%3o',ord($1))/eg if $self->{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->stringify($v, ref $v); my $shortmore = ''; if ($self->{veryCompact} && ref $v && (ref $v eq 'ARRAY' and !grep(ref $_, @$v) )) { my $depth = $#$v; ($shortmore, $depth) = (' ...', $self->{arrayDepth} - 1) if $self->{arrayDepth} and $depth >= $self->{arrayDepth}; my @a = map $self->stringify($_), @$v[0..$depth]; print "0..$#{$v} @a$shortmore\n"; } elsif ($self->{veryCompact} && ref $v && (ref $v eq 'HASH') and !grep(ref $_, values %$v)) { my @a = sort keys %$v; my $depth = $#a; ($shortmore, $depth) = (' ...', $self->{hashDepth} - 1) if $self->{hashDepth} and $depth >= $self->{hashDepth}; my @b = map {$self->stringify($_) . " => " . $self->stringify($$v{$_})} @a[0..$depth]; local $" = ', '; print "@b$shortmore\n"; } else { print "$short\n"; $self->unwrap($v,shift); } } sub unwrap { my $self = shift; return if $DB::signal and $self->{stopDbSignal}; my ($v) = shift ; my ($s) = shift || 0; # extra no of spaces my $sp; my (%v,@v,$address,$short,$fileno); $sp = " " x $s ; $s += 3 ; # Check for reused addresses if (ref $v) { my $val = $v; { no strict 'refs'; $val = &{'overload::StrVal'}($v) if %overload:: and defined &{'overload::StrVal'}; } ($address) = $val =~ /(0x[0-9a-f]+)\)$/ ; if (!$self->{dumpReused} && defined $address) { $address{$address}++ ; if ( $address{$address} > 1 ) { print "${sp}-> REUSED_ADDRESS\n" ; return ; } } } elsif (ref \$v eq 'GLOB') { $address = "$v" . ""; # To avoid a bug with globs $address{$address}++ ; if ( $address{$address} > 1 ) { print "${sp}*DUMPED_GLOB*\n" ; return ; } } if (ref $v eq 'Regexp') { my $re = "$v"; $re =~ s,/,\\/,g; print "$sp-> qr/$re/\n"; return; } if ( UNIVERSAL::isa($v, 'HASH') ) { my @sortKeys = sort keys(%$v) ; my $more; my $tHashDepth = $#sortKeys ; $tHashDepth = $#sortKeys < $self->{hashDepth}-1 ? $#sortKeys : $self->{hashDepth}-1 unless $self->{hashDepth} eq '' ; $more = "....\n" if $tHashDepth < $#sortKeys ; my $shortmore = ""; $shortmore = ", ..." if $tHashDepth < $#sortKeys ; $#sortKeys = $tHashDepth ; if ($self->{compactDump} && !grep(ref $_, values %{$v})) { $short = $sp; my @keys; for (@sortKeys) { push @keys, $self->stringify($_) . " => " . $self->stringify($v->{$_}); } $short .= join ', ', @keys; $short .= $shortmore; (print "$short\n"), return if length $short <= $self->{compactDump}; } for my $key (@sortKeys) { return if $DB::signal and $self->{stopDbSignal}; my $value = $ {$v}{$key} ; print $sp, $self->stringify($key), " => "; $self->DumpElem($value, $s); } print "$sp empty hash\n" unless @sortKeys; print "$sp$more" if defined $more ; } elsif ( UNIVERSAL::isa($v, 'ARRAY') ) { my $tArrayDepth = $#{$v} ; my $more ; $tArrayDepth = $#$v < $self->{arrayDepth}-1 ? $#$v : $self->{arrayDepth}-1 unless $self->{arrayDepth} eq '' ; $more = "....\n" if $tArrayDepth < $#{$v} ; my $shortmore = ""; $shortmore = " ..." if $tArrayDepth < $#{$v} ; if ($self->{compactDump} && !grep(ref $_, @{$v})) { if ($#$v >= 0) { $short = $sp . "0..$#{$v} " . join(" ", map {defined $v->[$_] ? $self->stringify($v->[$_]) : "empty"} (0..$tArrayDepth) ) . "$shortmore"; } else { $short = $sp . "empty array"; } (print "$short\n"), return if length $short <= $self->{compactDump}; } for my $num (0 .. $tArrayDepth) { return if $DB::signal and $self->{stopDbSignal}; print "$sp$num "; if (defined $v->[$num]) { $self->DumpElem($v->[$num], $s); } else { print "empty slot\n"; } } print "$sp empty array\n" unless @$v; print "$sp$more" if defined $more ; } elsif ( UNIVERSAL::isa($v, 'SCALAR') or ref $v eq 'REF' ) { print "$sp-> "; $self->DumpElem($$v, $s); } elsif ( UNIVERSAL::isa($v, 'CODE') ) { print "$sp-> "; $self->dumpsub(0, $v); } elsif ( UNIVERSAL::isa($v, 'GLOB') ) { print "$sp-> ",$self->stringify($$v,1),"\n"; if ($self->{globPrint}) { $s += 3; $self->dumpglob('', $s, "{$$v}", $$v, 1); } elsif (defined ($fileno = fileno($v))) { print( (' ' x ($s+3)) . "FileHandle({$$v}) => fileno($fileno)\n" ); } } elsif (ref \$v eq 'GLOB') { if ($self->{globPrint}) { $self->dumpglob('', $s, "{$v}", $v, 1); } elsif (defined ($fileno = fileno(\$v))) { print( (' ' x $s) . "FileHandle({$v}) => fileno($fileno)\n" ); } } } sub matchvar { $_[0] eq $_[1] or ($_[1] =~ /^([!~])(.)([\x00-\xff]*)/) and ($1 eq '!') ^ (eval {($_[2] . "::" . $_[0]) =~ /$2$3/}); } sub compactDump { my $self = shift; $self->{compactDump} = shift if @_; $self->{compactDump} = 6*80-1 if $self->{compactDump} and $self->{compactDump} < 2; $self->{compactDump}; } sub veryCompact { my $self = shift; $self->{veryCompact} = shift if @_; $self->compactDump(1) if !$self->{compactDump} and $self->{veryCompact}; $self->{veryCompact}; } sub set_unctrl { my $self = shift; if (@_) { my $in = shift; if ($in eq 'unctrl' or $in eq 'quote') { $self->{unctrl} = $in; } else { print "Unknown value for 'unctrl'.\n"; } } $self->{unctrl}; } sub set_quote { my $self = shift; if (@_ and $_[0] eq '"') { $self->{tick} = '"'; $self->{unctrl} = 'quote'; } elsif (@_ and $_[0] eq 'auto') { $self->{tick} = 'auto'; $self->{unctrl} = 'quote'; } elsif (@_) { # Need to set $self->{tick} = "'"; $self->{unctrl} = 'unctrl'; } $self->{tick}; } sub dumpglob { my $self = shift; return if $DB::signal and $self->{stopDbSignal}; my ($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) = @_; $off ||= 0; 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); $package .= "::" unless $package =~ /::$/; *stab = *main::; while ($package =~ /(\w+?::)/g) { *stab = defined ${stab}{$1} ? ${stab}{$1} : ''; } $self->{TotalStrings} = 0; $self->{Strings} = 0; $self->{CompleteTotal} = 0; for my $k (keys %stab) { my ($key,$val) = ($k, $stab{$k}); 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 = Dumpvalue->new; $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 = Dumpvalue->new(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> rudimentary 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