/usr/share/perl5/PDF/FDF/Simple.pm is in libpdf-fdf-simple-perl 0.21-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 | package PDF::FDF::Simple;
use strict;
use warnings;
use vars qw($VERSION $deferred_result_FDF_OPTIONS);
use Data::Dumper;
use Parse::RecDescent;
use IO::File;
use base 'Class::Accessor::Fast';
PDF::FDF::Simple->mk_accessors(qw(
skip_undefined_fields
filename
content
errmsg
parser
attribute_file
attribute_ufile
attribute_id
));
$VERSION = '0.21';
#Parse::RecDescent environment variables: enable for Debugging
#$::RD_TRACE = 1;
#$::RD_HINT = 1;
sub new {
my $class = shift;
my $parser;
if ($ENV{PDF_FDF_SIMPLE_IGNORE_PRECOMPILED_GRAMMAR}) {
# use external grammar file
require File::ShareDir;
my $grammar_file = File::ShareDir::module_file('PDF::FDF::Simple', 'grammar');
open GRAMMAR_FILE, $grammar_file or die "Cannot open grammar file ".$grammar_file;
local $/;
my $grammar = <GRAMMAR_FILE>;
$parser = Parse::RecDescent->new($grammar);
} else {
# use precompiled grammar
require PDF::FDF::Simple::Grammar;
$parser = new PDF::FDF::Simple::Grammar;
}
my %DEFAULTS = (
errmsg => '',
skip_undefined_fields => 0,
parser => $parser
);
# accept hashes or hash refs for backwards compatibility
my %ARGS = ref($_[0]) =~ /HASH/ ? %{$_[0]} : @_;
my $self = Class::Accessor::new($class, { %DEFAULTS, %ARGS });
return $self;
}
sub _fdf_header {
my $self = shift;
my $string = "%FDF-1.2\n\n1 0 obj\n<<\n/FDF << /Fields 2 0 R";
# /F
if ($self->attribute_file){
$string .= "/F (".$self->attribute_file.")";
}
# /UF
if ($self->attribute_ufile){
$string .= "/UF (".$self->attribute_ufile.")";
}
# /ID
if ($self->attribute_id){
$string .= "/ID[";
$string .= $_ foreach @{$self->attribute_id};
$string .= "]";
}
$string .= ">>\n>>\nendobj\n2 0 obj\n[";
return $string;
}
sub _fdf_footer {
my $self = shift;
return <<__EOT__;
]
endobj
trailer
<<
/Root 1 0 R
>>
%%EOF
__EOT__
}
sub _quote {
my $self = shift;
my $str = shift;
$str =~ s,\\,\\\\,g;
$str =~ s,\(,\\(,g;
$str =~ s,\),\\),g;
$str =~ s,\n,\\r,gs;
return $str;
}
sub _fdf_field_formatstr {
my $self = shift;
return "<< /T (%s) /V (%s) >>\n"
}
sub as_string {
my $self = shift;
my $fdf_string = $self->_fdf_header;
foreach (sort keys %{$self->content}) {
my $val = $self->content->{$_};
if (not defined $val) {
next if ($self->skip_undefined_fields);
$val = '';
}
$fdf_string .= sprintf ($self->_fdf_field_formatstr,
$_,
$self->_quote($val));
}
$fdf_string .= $self->_fdf_footer;
return $fdf_string;
}
sub save {
my $self = shift;
my $filename = shift || $self->filename;
open (F, "> ".$filename) or do {
$self->errmsg ('error: open file ' . $filename);
return 0;
};
print F $self->as_string;
close (F);
$self->errmsg ('');
return 1;
}
sub _read_fdf {
my $self = shift;
my $filecontent;
# read file to be checked
unless (open FH, "< ".$self->filename) {
$self->errmsg ('error: could not read file ' . $self->filename);
return undef;
} else {
local $/;
$filecontent = <FH>;
}
close FH;
$self->errmsg ('');
return $filecontent;
}
sub _map_parser_output {
my $self = shift;
my $output = shift;
my $fdfcontent = {};
foreach my $obj ( @$output ) {
foreach my $contentblock ( @$obj ) {
foreach my $keys (keys %$contentblock) {
$fdfcontent->{$keys} = $contentblock->{$keys};
}
}
}
return $fdfcontent;
}
sub load {
my $self = shift;
my $filecontent = shift;
# prepare content
unless ($filecontent) {
$filecontent = $self->_read_fdf;
return undef unless $filecontent;
}
# parse
my $output;
{
local $SIG{'__WARN__'} = sub { warn $_[0] unless $_[0] =~ /Deep recursion on subroutine/ };
$output = $self->parser->startrule ($filecontent);
}
# take over parser results
$self->attribute_file ($PDF::FDF::Simple::deferred_result_FDF_OPTIONS->{F}); # /F
$self->attribute_ufile ($PDF::FDF::Simple::deferred_result_FDF_OPTIONS->{UF}); # /UF
$self->attribute_id ($PDF::FDF::Simple::deferred_result_FDF_OPTIONS->{ID}); # /ID
$self->content ($self->_map_parser_output ($output));
$self->errmsg ("Corrupt FDF file!\n") unless $self->content;
return $self->content;
}
1;
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