Commit | Line | Data |
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1 | #TODO: Convert this to a string |
2 | package DBM::Deep::Engine::Sector::Scalar; |
3 | |
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4 | use 5.006_000; |
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5 | |
6 | use strict; |
7 | use warnings FATAL => 'all'; |
8 | |
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9 | use DBM::Deep::Engine::Sector::Data; |
10 | our @ISA = qw( DBM::Deep::Engine::Sector::Data ); |
11 | |
12 | sub free { |
13 | my $self = shift; |
14 | |
15 | my $chain_loc = $self->chain_loc; |
16 | |
17 | $self->SUPER::free(); |
18 | |
19 | if ( $chain_loc ) { |
20 | $self->engine->_load_sector( $chain_loc )->free; |
21 | } |
22 | |
23 | return; |
24 | } |
25 | |
26 | sub type { $_[0]{engine}->SIG_DATA } |
27 | sub _init { |
28 | my $self = shift; |
29 | |
30 | my $engine = $self->engine; |
31 | |
32 | unless ( $self->offset ) { |
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33 | $self->{offset} = $engine->_request_data_sector( $self->size ); |
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34 | my $data = delete $self->{data}; |
35 | my $dlen = length $data; |
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36 | |
37 | my $data_section = $self->size - $self->base_size - $engine->byte_size - 1; |
38 | |
39 | |
40 | |
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41 | my $curr_offset = $self->offset; |
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42 | my $continue = 1; |
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43 | while ( $continue ) { |
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44 | my $next_offset = 0; |
45 | |
46 | my ($leftover, $this_len, $chunk); |
47 | if ( $dlen > $data_section ) { |
48 | $leftover = 0; |
49 | $this_len = $data_section; |
50 | $chunk = substr( $data, 0, $this_len ); |
51 | |
52 | $dlen -= $data_section; |
53 | $next_offset = $engine->_request_data_sector( $self->size ); |
54 | $data = substr( $data, $this_len ); |
55 | } |
56 | else { |
57 | $leftover = $data_section - $dlen; |
58 | $this_len = $dlen; |
59 | $chunk = $data; |
60 | |
61 | $continue = 0; |
62 | } |
63 | |
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64 | my $string = chr(0) x $self->size; |
65 | substr( $string, 0, 1, $self->type ); |
66 | substr( $string, $self->base_size, $engine->byte_size + 1, |
67 | pack( $engine->StP($engine->byte_size), $next_offset ) # Chain loc |
68 | . pack( $engine->StP(1), $this_len ), # Data length |
69 | ); |
70 | substr( $string, $self->base_size + $engine->byte_size + 1, $this_len, |
71 | $chunk, |
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72 | ); |
73 | |
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74 | $engine->storage->print_at( $curr_offset, $string ); |
75 | |
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76 | $curr_offset = $next_offset; |
77 | } |
78 | |
79 | return; |
80 | } |
81 | } |
82 | |
83 | sub data_length { |
84 | my $self = shift; |
85 | |
86 | my $buffer = $self->engine->storage->read_at( |
87 | $self->offset + $self->base_size + $self->engine->byte_size, 1 |
88 | ); |
89 | |
90 | return unpack( $self->engine->StP(1), $buffer ); |
91 | } |
92 | |
93 | sub chain_loc { |
94 | my $self = shift; |
95 | return unpack( |
96 | $self->engine->StP($self->engine->byte_size), |
97 | $self->engine->storage->read_at( |
98 | $self->offset + $self->base_size, |
99 | $self->engine->byte_size, |
100 | ), |
101 | ); |
102 | } |
103 | |
104 | sub data { |
105 | my $self = shift; |
106 | # my ($args) = @_; |
107 | # $args ||= {}; |
108 | |
109 | my $data; |
110 | while ( 1 ) { |
111 | my $chain_loc = $self->chain_loc; |
112 | |
113 | $data .= $self->engine->storage->read_at( |
114 | $self->offset + $self->base_size + $self->engine->byte_size + 1, $self->data_length, |
115 | ); |
116 | |
117 | last unless $chain_loc; |
118 | |
119 | $self = $self->engine->_load_sector( $chain_loc ); |
120 | } |
121 | |
122 | return $data; |
123 | } |
124 | |
125 | 1; |
126 | __END__ |