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package Data::Embed; |
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141223
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use strict; |
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197
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use warnings; |
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3637
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use English qw< -no_match_vars >; |
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23008
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2360
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use Exporter qw< import >; |
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340
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{ our $VERSION = '0.32'; } |
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4616
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use Log::Log4perl::Tiny qw< :easy :dead_if_first >; |
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45735
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1817
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use Scalar::Util qw< blessed >; |
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6120
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our @EXPORT_OK = |
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qw< writer reader embed embedded generate_module_from_file reassemble >; |
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our @EXPORT = (); |
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our %EXPORT_TAGS = ( |
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all => \@EXPORT_OK, |
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reading => [qw< reader embedded >], |
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writing => [qw< writer embed generate_module_from_file reassemble >], |
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); |
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sub writer { |
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1
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26024
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require Data::Embed::Writer; |
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return Data::Embed::Writer->new(@_); |
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} |
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sub reader { |
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1812
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require Data::Embed::Reader; |
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return Data::Embed::Reader->new(@_); |
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} |
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sub embed { |
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my %args = (@_ && ref($_[0])) ? %{$_[0]} : @_; |
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0
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32
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33
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my %constructor_args = |
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2
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map { $_ => delete $args{$_} } qw< input output >; |
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35
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$constructor_args{input} = $constructor_args{output} = |
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delete $args{container} |
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2
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100
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if exists $args{container}; |
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2
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my $writer = writer(%constructor_args) |
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or LOGCROAK 'could not get the writer object'; |
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2
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return $writer->add(%args); |
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} ## end sub embed |
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sub embedded { |
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1
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1
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1
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1071
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my $reader = reader(shift) |
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or LOGCROAK 'could not get the writer object'; |
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1
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return $reader->files(); |
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} |
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50
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sub generate_module_from_file { |
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0
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1
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require Data::Embed::OneFileAsModule; |
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0
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0
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goto &Data::Embed::OneFileAsModule::generate_module_from_file; |
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} |
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55
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sub __compare_and_shift { |
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6
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my ($l1, $l2) = @_; |
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100
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16
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while (scalar(@$l1) && scalar(@$l2)) { |
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last unless $l1->[0]->is_same_as($l2->[0]); |
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shift @$l1; |
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shift @$l2; |
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} |
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return ($l1, $l2); |
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} ## end sub __compare_and_shift |
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65
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sub __temporary_for { |
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my ($target, $previous) = @_; |
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0
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0
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require File::Temp; |
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0
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require File::Basename; |
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my $dir = File::Basename::dirname $target; |
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my $template = File::Basename::basename($target) . '.tmp-XXXXXXX'; |
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my ($fh, $filename) = File::Temp::tempfile($template, DIR => $dir); |
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binmode $fh, ':raw'; |
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my $prefix = $previous->prefix(); |
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if ($prefix->{length}) { |
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require Data::Embed::Util; |
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Data::Embed::Util::transfer($prefix->fh(), $fh); |
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} |
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0
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close $fh; |
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0
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return $filename; |
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} ## end sub __temporary_for |
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86
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sub reassemble { |
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1
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1762
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my %args = (@_ && ref($_[0])) ? %{$_[0]} : @_; |
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88
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my $target = $args{target}; |
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my $interim_target; |
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my @sequence = @{$args{sequence} || []}; |
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92
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93
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my $writer; |
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100
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if (ref($target) eq 'SCALAR' || (-e $target)) { |
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my $previous = reader($target); |
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97
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6
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my ($rprevious, $rsequence) = |
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__compare_and_shift([$previous->files()], [@sequence]); |
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100
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# is it a nop? |
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6
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my $nprevious = scalar @$rprevious; |
102
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6
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3
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my $nsequence = scalar @$rsequence; |
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return unless $nprevious || $nsequence; |
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105
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# if there's a residual in both, use a temporary something |
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6
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100
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66
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if ( |
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66
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107
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($nprevious && $nsequence) # this is the real condition |
108
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|| $nprevious # FIXME move into its own, see next condition... |
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) |
110
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{ |
111
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5
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if (ref $target) { # pointer to scalar... hopefully! |
112
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4
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8
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$interim_target = $previous->prefix()->contents(); |
113
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4
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9
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$writer = writer( |
114
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input => \$interim_target, |
115
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output => \$interim_target, |
116
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); |
117
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} ## end if (ref $target) |
118
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else { |
119
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0
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0
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$interim_target = __temporary_for($target, $previous); |
120
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0
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0
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$writer = writer( |
121
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input => $interim_target, |
122
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output => $interim_target, |
123
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); |
124
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} ## end else [ if (ref $target) ] |
125
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} ## end if (($nprevious && $nsequence...)) |
126
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elsif ($nprevious) { # we "just" have to get rid of stuff |
127
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# FIXME will implement later, let's just no-reuse here... |
128
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} |
129
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else { # append residual stuff in @$rsequence |
130
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2
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4
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@sequence = @$rsequence; |
131
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2
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3
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$writer = writer(output => $target, input => $target); |
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} |
133
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} ## end if (ref($target) eq 'SCALAR'...) |
134
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else { |
135
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1
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2
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$writer = writer(output => $target); |
136
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} |
137
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138
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$writer->add( |
139
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inputs => [ |
140
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map { |
141
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7
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100
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66
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48
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if (blessed($_) && $_->isa('Data::Embed::File')) { |
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13
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44
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142
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{ |
143
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5
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7
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name => $_->name(), |
144
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fh => $_->fh(), |
145
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}; |
146
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} ## end if (blessed($_) && $_->...) |
147
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else { |
148
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8
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15
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$_; |
149
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} |
150
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} @sequence |
151
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] |
152
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); |
153
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7
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15
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$writer->write_index(); |
154
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155
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7
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100
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9
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if (defined $interim_target) { |
156
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4
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50
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9
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if (ref $target) { |
157
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4
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5
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$$target = $interim_target; |
158
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} |
159
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else { |
160
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0
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0
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rename $interim_target, $target; # atomic |
161
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} |
162
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} ## end if (defined $interim_target) |
163
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164
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7
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13
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return; |
165
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} ## end sub reassemble |
166
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167
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1; |