line |
stmt |
bran |
cond |
sub |
pod |
time |
code |
1
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4
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4
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135636
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use strict; |
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10
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4
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251
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2
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4
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4
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20
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use warnings; |
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4
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9
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4
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181
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3
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4
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package Data::Handle; |
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BEGIN { |
6
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4
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4
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134
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$Data::Handle::AUTHORITY = 'cpan:KENTNL'; |
7
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} |
8
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{ |
9
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$Data::Handle::VERSION = '0.02001003'; |
10
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} |
11
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12
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# ABSTRACT: A Very simple interface to the __DATA__ file handle. |
13
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14
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15
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16
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17
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18
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my %datastash; |
19
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4
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4
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4568
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use Symbol qw( gensym ); |
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4
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4749
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4
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440
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20
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4
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4
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27
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use Scalar::Util qw( weaken ); |
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4
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7
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4
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389
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21
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4
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4
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3843
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use parent qw( IO::File ); |
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4
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1437
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4
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30
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22
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4
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4
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77052
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use Package::Stash 0.15; # has_symbol |
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4
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28114
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4
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113
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23
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4
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4
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33
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use Carp (); |
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4
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9
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4
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69
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24
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4
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4
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2923
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use Data::Handle::Exception; |
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4
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15
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4
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130
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25
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4
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4
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2569
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use Data::Handle::IO; |
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4
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10
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4
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94
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26
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4
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4
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20
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use Try::Tiny; |
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4
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19
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4
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6395
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27
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28
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29
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sub new { |
30
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28
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28
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1
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15612
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my ( $class, $targetpackage ) = @_; |
31
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32
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28
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100
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100
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_e('NoSymbol')->throw("$targetpackage has no DATA symbol") |
33
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if ( !$class->_has_data_symbol($targetpackage) ); |
34
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35
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27
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100
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153
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if ( !$class->_is_valid_data_tell($targetpackage) ) { |
36
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1
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5
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_e('BadFilePos') |
37
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->throw( "$targetpackage has a DATA symbol, but the filepointer" |
38
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. " is well beyond the __DATA__ section.\n" |
39
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. " We can't work out safely where it is.\n" |
40
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. $class->_stringify_metadata($targetpackage) |
41
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. "\n" ); |
42
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} |
43
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44
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26
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112
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my $sym = gensym(); |
45
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26
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349
|
my $xsym = $sym; |
46
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26
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85
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weaken($xsym); |
47
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48
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## no critic( ProhibitTies ) |
49
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26
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41
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tie *{$sym}, 'Data::Handle::IO', { self => $xsym }; |
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26
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292
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50
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26
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50
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${ *{$sym} }{stash} = {}; |
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26
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40
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26
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110
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51
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26
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64
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bless $sym, $class; |
52
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26
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119
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$sym->_stash->{start_offset} = $class->_get_start_offset($targetpackage); |
53
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26
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74
|
$sym->_stash->{targetpackage} = $targetpackage; |
54
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26
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78
|
$sym->_stash->{current_offset} = $class->_get_start_offset($targetpackage); |
55
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26
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84
|
$sym->_stash->{filehandle} = $class->_get_data_symbol($targetpackage); |
56
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26
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148
|
return $sym; |
57
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58
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|
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} |
59
|
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60
|
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|
|
sub _has_data_symbol { |
61
|
73
|
|
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73
|
|
119
|
my ( $self, $package ) = @_; |
62
|
73
|
|
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112
|
my $rval = undef; |
63
|
|
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|
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try { |
64
|
73
|
|
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73
|
|
2430
|
my $object = Package::Stash->new($package); |
65
|
70
|
100
|
|
|
|
717
|
return unless $object->has_symbol('DATA'); |
66
|
69
|
|
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|
|
357
|
my $fh = $object->get_symbol('DATA'); |
67
|
69
|
|
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|
|
130
|
$rval = defined fileno *{$fh}; |
|
69
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501
|
|
68
|
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|
|
} |
69
|
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catch { |
70
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3
|
50
|
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3
|
|
46
|
if ( $_ =~ /is not a module name/ ) { |
71
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3
|
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4
|
$rval = undef; |
72
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3
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12
|
return; |
73
|
|
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|
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} |
74
|
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|
|
## no critic (RequireCarping) |
75
|
0
|
|
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|
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0
|
die $_; |
76
|
73
|
|
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|
|
499
|
}; |
77
|
73
|
|
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|
|
1191
|
return $rval; |
78
|
|
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|
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} |
79
|
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|
80
|
|
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|
|
sub _get_data_symbol { |
81
|
35
|
|
|
35
|
|
150
|
my ( $self, $package ) = @_; |
82
|
35
|
100
|
|
|
|
94
|
if ( !$self->_has_data_symbol($package) ) { |
83
|
1
|
|
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|
|
5
|
_e('Internal::BadGet') |
84
|
|
|
|
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|
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->throw( |
85
|
|
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|
|
|
|
'_get_data_symbol was called when there is no data_symbol to get'); |
86
|
|
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|
|
|
|
} |
87
|
34
|
|
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|
|
391
|
return Package::Stash->new($package)->get_symbol('DATA'); |
88
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|
|
} |
89
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|
90
|
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|
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sub _get_start_offset { |
91
|
57
|
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57
|
|
168
|
my ( $self, $package ) = @_; |
92
|
|
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93
|
57
|
100
|
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|
308
|
return $datastash{$package}->{offset} |
94
|
|
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|
|
if ( exists $datastash{$package}->{offset} ); |
95
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|
96
|
5
|
100
|
|
|
|
18
|
if ( !$self->_has_data_symbol($package) ) { |
97
|
1
|
|
|
|
|
4
|
_e('Internal::BadGet') |
98
|
|
|
|
|
|
|
->throw( |
99
|
|
|
|
|
|
|
'_get_start_offset was called when there is no data_symbol to get'); |
100
|
|
|
|
|
|
|
} |
101
|
4
|
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|
|
16
|
my $fd = $self->_get_data_symbol($package); |
102
|
4
|
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|
|
25
|
my $position = tell $fd; |
103
|
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|
|
|
|
|
104
|
4
|
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16
|
$datastash{$package}->{offset} = $position; |
105
|
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|
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106
|
4
|
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|
|
13
|
return $position; |
107
|
|
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|
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} |
108
|
|
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|
|
|
|
109
|
|
|
|
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|
|
sub _is_valid_data_tell { |
110
|
28
|
|
|
28
|
|
99
|
my ( $self, $package ) = @_; |
111
|
28
|
100
|
66
|
|
|
247
|
return 1 |
112
|
|
|
|
|
|
|
if ( exists $datastash{$package} && $datastash{$package}->{valid} == 1 ); |
113
|
5
|
100
|
|
|
|
15
|
if ( !$self->_has_data_symbol($package) ) { |
114
|
1
|
|
|
|
|
5
|
_e('Internal::BadGet') |
115
|
|
|
|
|
|
|
->throw( |
116
|
|
|
|
|
|
|
'_is_valid_data_tell was called when there is no data_symbol to get'); |
117
|
|
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|
|
} |
118
|
|
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|
119
|
4
|
|
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|
|
22
|
my $fh = $self->_get_data_symbol($package); |
120
|
4
|
|
|
|
|
25
|
my $offset = $self->_get_start_offset($package); |
121
|
|
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|
|
122
|
|
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|
|
|
|
# The offset to the start of __DATA__ is 9 bytes because it includes the |
123
|
|
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|
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|
|
# trailing \n |
124
|
|
|
|
|
|
|
# |
125
|
4
|
|
|
|
|
11
|
my $checkfor = qq{__DATA__\n}; |
126
|
4
|
|
|
|
|
50
|
seek $fh, ( $offset - length $checkfor ), 0; |
127
|
4
|
|
|
|
|
104
|
read $fh, my ($buffer), length $checkfor; |
128
|
4
|
|
|
|
|
40
|
seek $fh, $offset, 0; |
129
|
|
|
|
|
|
|
|
130
|
4
|
|
|
|
|
16
|
$datastash{$package}->{previous_bytes} = $buffer; |
131
|
|
|
|
|
|
|
|
132
|
4
|
100
|
|
|
|
17
|
if ( $buffer eq $checkfor ) { |
133
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3
|
|
|
|
|
9
|
$datastash{$package}->{valid} = 1; |
134
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3
|
|
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|
|
17
|
return 1; |
135
|
|
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|
|
|
|
} |
136
|
|
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|
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|
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else { |
137
|
1
|
|
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|
|
5
|
$datastash{$package}->{valid} = 0; |
138
|
1
|
|
|
|
|
4
|
return; |
139
|
|
|
|
|
|
|
} |
140
|
|
|
|
|
|
|
} |
141
|
|
|
|
|
|
|
|
142
|
|
|
|
|
|
|
sub _stringify_metadata { |
143
|
1
|
|
|
1
|
|
3
|
my ( $self, $package ) = @_; |
144
|
1
|
|
|
|
|
2
|
my @lines = (); |
145
|
1
|
50
|
|
|
|
5
|
if ( not exists $datastash{$package} ) { |
146
|
0
|
|
|
|
|
0
|
push @lines, "Nothing known about $package\n"; |
147
|
0
|
|
|
|
|
0
|
return join "\n", @lines; |
148
|
|
|
|
|
|
|
} |
149
|
|
|
|
|
|
|
else { |
150
|
1
|
|
|
|
|
6
|
push @lines, q{Offset : } . $datastash{$package}->{offset}; |
151
|
1
|
|
|
|
|
5
|
push @lines, q{Prelude : '} . $datastash{$package}->{previous_bytes} . q{'}; |
152
|
1
|
|
|
|
|
5
|
push @lines, q{Valid: } . $datastash{$package}->{valid}; |
153
|
1
|
|
|
|
|
22
|
return join "\n", @lines; |
154
|
|
|
|
|
|
|
} |
155
|
|
|
|
|
|
|
} |
156
|
|
|
|
|
|
|
|
157
|
|
|
|
|
|
|
sub _readline { |
158
|
22
|
|
|
22
|
|
29
|
my ( $self, @args ) = @_; |
159
|
|
|
|
|
|
|
|
160
|
22
|
100
|
|
|
|
54
|
_e('API::Invalid::Params')->throw('_readline() takes no parameters') if @args; |
161
|
|
|
|
|
|
|
|
162
|
21
|
|
|
|
|
36
|
my $fh = $self->_fh; |
163
|
21
|
|
|
|
|
46
|
$self->_restore_pos(); |
164
|
21
|
100
|
|
|
|
67
|
if (wantarray) { |
165
|
1
|
|
|
|
|
16
|
my @result = <$fh>; |
166
|
1
|
|
|
|
|
4
|
$self->_set_pos(); |
167
|
1
|
|
|
|
|
6
|
return @result; |
168
|
|
|
|
|
|
|
} |
169
|
20
|
|
|
|
|
165
|
my $result = <$fh>; |
170
|
20
|
|
|
|
|
57
|
$self->_set_pos(); |
171
|
20
|
|
|
|
|
93
|
return $result; |
172
|
|
|
|
|
|
|
} |
173
|
|
|
|
|
|
|
|
174
|
|
|
|
|
|
|
sub _read { |
175
|
5
|
|
|
5
|
|
13
|
my ( $self, undef, $len, $offset ) = @_; |
176
|
|
|
|
|
|
|
|
177
|
|
|
|
|
|
|
## no critic ( ProhibitMagicNumbers ) |
178
|
5
|
100
|
100
|
|
|
48
|
_e('API::Invalid::Params')->throw('_read() takes 2 or 3 parameters.') |
179
|
|
|
|
|
|
|
if ( scalar @_ < 3 or scalar @_ > 4 ); |
180
|
|
|
|
|
|
|
|
181
|
3
|
|
|
|
|
10
|
$self->_restore_pos(); |
182
|
3
|
|
|
|
|
7
|
my $return; |
183
|
3
|
100
|
|
|
|
10
|
if ( defined $offset ) { |
184
|
2
|
|
|
|
|
8
|
$return = read $self->_fh, $_[1], $len, $offset; |
185
|
|
|
|
|
|
|
} |
186
|
|
|
|
|
|
|
else { |
187
|
1
|
|
|
|
|
4
|
$return = read $self->_fh, $_[1], $len; |
188
|
|
|
|
|
|
|
} |
189
|
3
|
|
|
|
|
12
|
$self->_set_pos(); |
190
|
3
|
|
|
|
|
12
|
return $return; |
191
|
|
|
|
|
|
|
} |
192
|
|
|
|
|
|
|
|
193
|
|
|
|
|
|
|
sub _getc { |
194
|
37
|
|
|
37
|
|
61
|
my ($self) = @_; |
195
|
37
|
100
|
|
|
|
86
|
_e('API::Invalid::Params')->throw('_get() takes 0 parameters.') |
196
|
|
|
|
|
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if scalar @_ > 1; |
197
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36
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66
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$self->_restore_pos(); |
198
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36
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109
|
my $return = getc $self->_fh; |
199
|
36
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104
|
$self->_set_pos(); |
200
|
36
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|
158
|
return $return; |
201
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} |
202
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203
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|
sub _seek { |
204
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8
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8
|
|
18
|
my ( $self, $position, $whence ) = @_; |
205
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206
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|
|
## no critic ( ProhibitMagicNumbers ) |
207
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208
|
8
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100
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|
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|
29
|
_e('API::Invalid::Params')->throw('_seek() takes 2 params.') |
209
|
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|
|
|
if scalar @_ != 3; |
210
|
|
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211
|
7
|
|
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|
|
16
|
my $fh = $self->_stash->{filehandle}; |
212
|
|
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|
|
|
|
|
213
|
7
|
100
|
|
|
|
25
|
if ( $whence == 0 ) { |
|
|
50
|
|
|
|
|
|
|
|
50
|
|
|
|
|
|
214
|
6
|
|
|
|
|
14
|
$position = $self->_stash->{start_offset} + $position; |
215
|
|
|
|
|
|
|
} |
216
|
|
|
|
|
|
|
elsif ( $whence == 1 ) { |
217
|
0
|
|
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|
|
0
|
$whence = 0; |
218
|
0
|
|
|
|
|
0
|
$position = $self->_stash->{current_offset} + $position; |
219
|
|
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|
|
|
|
} |
220
|
|
|
|
|
|
|
elsif ( $whence == 2 ) { |
221
|
|
|
|
|
|
|
} |
222
|
|
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|
|
else { |
223
|
1
|
|
|
|
|
5
|
_e('API::Invalid::Whence')->throw('Expected whence values are 0,1,2'); |
224
|
|
|
|
|
|
|
} |
225
|
6
|
|
|
|
|
39
|
my $return = seek $fh, $position, $whence; |
226
|
6
|
|
|
|
|
18
|
$self->_set_pos(); |
227
|
6
|
|
|
|
|
60
|
return $return; |
228
|
|
|
|
|
|
|
} |
229
|
|
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|
|
|
|
|
230
|
|
|
|
|
|
|
sub _tell { |
231
|
3
|
|
|
3
|
|
5
|
my ($self) = shift; |
232
|
3
|
100
|
|
|
|
15
|
_e('API::Invalid::Params')->throw('_tell() takes no params.') if @_; |
233
|
2
|
|
|
|
|
4
|
return $self->_stash->{current_offset} - $self->_stash->{start_offset}; |
234
|
|
|
|
|
|
|
} |
235
|
|
|
|
|
|
|
|
236
|
|
|
|
|
|
|
sub _eof { |
237
|
43
|
|
|
43
|
|
53
|
my $self = shift; |
238
|
43
|
100
|
66
|
|
|
227
|
_e('API::Invalid::Params')->throw("_eof() takes no params : @_ ") |
239
|
|
|
|
|
|
|
if @_ && $_[0] != 1; |
240
|
42
|
|
|
|
|
77
|
$self->_restore_pos(); |
241
|
42
|
|
|
|
|
158
|
return eof $self->_stash->{filehandle}; |
242
|
|
|
|
|
|
|
} |
243
|
|
|
|
|
|
|
|
244
|
|
|
|
|
|
|
sub _restore_pos { |
245
|
102
|
|
|
102
|
|
114
|
my $self = shift; |
246
|
102
|
|
|
|
|
189
|
return seek $self->_stash->{filehandle}, $self->_stash->{current_offset}, 0; |
247
|
|
|
|
|
|
|
} |
248
|
|
|
|
|
|
|
|
249
|
|
|
|
|
|
|
sub _set_pos { |
250
|
66
|
|
|
66
|
|
84
|
my $self = shift; |
251
|
66
|
|
|
|
|
110
|
return ( $self->_stash->{current_offset} = tell $self->_stash->{filehandle} ); |
252
|
|
|
|
|
|
|
} |
253
|
|
|
|
|
|
|
|
254
|
559
|
|
|
559
|
|
564
|
sub _stash { return ${ *{ $_[0] } }{stash} } |
|
559
|
|
|
|
|
517
|
|
|
559
|
|
|
|
|
3313
|
|
255
|
1
|
|
|
1
|
|
6
|
sub _fileno { return } |
256
|
25
|
|
|
25
|
|
322
|
sub _e { return 'Data::Handle::Exception::' . shift } |
257
|
60
|
|
|
60
|
|
111
|
sub _fh { return shift->_stash->{filehandle} } |
258
|
|
|
|
|
|
|
|
259
|
|
|
|
|
|
|
sub _binmode { |
260
|
2
|
|
|
2
|
|
7
|
return _e('API::NotImplemented') |
261
|
|
|
|
|
|
|
->throw('_binmode() is difficult on Data::Handle and not implemented yet.'); |
262
|
|
|
|
|
|
|
} |
263
|
|
|
|
|
|
|
|
264
|
|
|
|
|
|
|
sub _open { |
265
|
2
|
|
|
2
|
|
10
|
return _e('API::Invalid')->throw('_open() is invalid on Data::Handle.'); |
266
|
|
|
|
|
|
|
} |
267
|
|
|
|
|
|
|
|
268
|
|
|
|
|
|
|
sub _close { |
269
|
2
|
|
|
2
|
|
11
|
return _e('API::Invalid')->throw('_close() is invalid on Data::Handle'); |
270
|
|
|
|
|
|
|
} |
271
|
|
|
|
|
|
|
|
272
|
|
|
|
|
|
|
sub _printf { |
273
|
2
|
|
|
2
|
|
13
|
return _e('API::Invalid')->throw('_printf() is invalid on Data::Handle.'); |
274
|
|
|
|
|
|
|
} |
275
|
|
|
|
|
|
|
|
276
|
|
|
|
|
|
|
sub _print { |
277
|
2
|
|
|
2
|
|
16
|
return _e('API::Invalid')->throw('_print() is invalid on Data::Handle.'); |
278
|
|
|
|
|
|
|
} |
279
|
|
|
|
|
|
|
|
280
|
|
|
|
|
|
|
sub _write { |
281
|
2
|
|
|
2
|
|
11
|
return _e('API::Invalid')->throw('_write() is invalid on Data::Handle.'); |
282
|
|
|
|
|
|
|
} |
283
|
|
|
|
|
|
|
|
284
|
|
|
|
|
|
|
|
285
|
|
|
|
|
|
|
1; |
286
|
|
|
|
|
|
|
|
287
|
|
|
|
|
|
|
__END__ |