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1 | package IO::Uncompress::Adapter::Inflate; |
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2 | |
3 | use strict; |
4 | use warnings; |
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5 | use bytes; |
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6 | |
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7 | use IO::Compress::Base::Common 2.019 qw(:Status); |
8 | use Compress::Raw::Zlib 2.019 qw(Z_OK Z_BUF_ERROR Z_STREAM_END Z_FINISH MAX_WBITS); |
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9 | |
10 | our ($VERSION); |
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11 | $VERSION = '2.019'; |
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12 | |
13 | |
14 | |
15 | sub mkUncompObject |
16 | { |
17 | my $crc32 = shift || 1; |
18 | my $adler32 = shift || 1; |
19 | my $scan = shift || 0; |
20 | |
21 | my $inflate ; |
22 | my $status ; |
23 | |
24 | if ($scan) |
25 | { |
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26 | ($inflate, $status) = new Compress::Raw::Zlib::InflateScan |
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27 | #LimitOutput => 1, |
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28 | CRC32 => $crc32, |
29 | ADLER32 => $adler32, |
30 | WindowBits => - MAX_WBITS ; |
31 | } |
32 | else |
33 | { |
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34 | ($inflate, $status) = new Compress::Raw::Zlib::Inflate |
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35 | AppendOutput => 1, |
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36 | LimitOutput => 1, |
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37 | CRC32 => $crc32, |
38 | ADLER32 => $adler32, |
39 | WindowBits => - MAX_WBITS ; |
40 | } |
41 | |
42 | return (undef, "Could not create Inflation object: $status", $status) |
43 | if $status != Z_OK ; |
44 | |
45 | return bless {'Inf' => $inflate, |
46 | 'CompSize' => 0, |
47 | 'UnCompSize' => 0, |
48 | 'Error' => '', |
49 | } ; |
50 | |
51 | } |
52 | |
53 | sub uncompr |
54 | { |
55 | my $self = shift ; |
56 | my $from = shift ; |
57 | my $to = shift ; |
58 | my $eof = shift ; |
59 | |
60 | my $inf = $self->{Inf}; |
61 | |
62 | my $status = $inf->inflate($from, $to, $eof); |
63 | $self->{ErrorNo} = $status; |
64 | |
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65 | if ($status != Z_OK && $status != Z_STREAM_END && $status != Z_BUF_ERROR) |
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66 | { |
67 | $self->{Error} = "Inflation Error: $status"; |
68 | return STATUS_ERROR; |
69 | } |
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70 | |
71 | return STATUS_OK if $status == Z_BUF_ERROR ; # ??? |
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72 | return STATUS_OK if $status == Z_OK ; |
73 | return STATUS_ENDSTREAM if $status == Z_STREAM_END ; |
74 | return STATUS_ERROR ; |
75 | } |
76 | |
77 | sub reset |
78 | { |
79 | my $self = shift ; |
80 | $self->{Inf}->inflateReset(); |
81 | |
82 | return STATUS_OK ; |
83 | } |
84 | |
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85 | #sub count |
86 | #{ |
87 | # my $self = shift ; |
88 | # $self->{Inf}->inflateCount(); |
89 | #} |
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90 | |
91 | sub crc32 |
92 | { |
93 | my $self = shift ; |
94 | $self->{Inf}->crc32(); |
95 | } |
96 | |
97 | sub compressedBytes |
98 | { |
99 | my $self = shift ; |
100 | $self->{Inf}->compressedBytes(); |
101 | } |
102 | |
103 | sub uncompressedBytes |
104 | { |
105 | my $self = shift ; |
106 | $self->{Inf}->uncompressedBytes(); |
107 | } |
108 | |
109 | sub adler32 |
110 | { |
111 | my $self = shift ; |
112 | $self->{Inf}->adler32(); |
113 | } |
114 | |
115 | sub sync |
116 | { |
117 | my $self = shift ; |
118 | ( $self->{Inf}->inflateSync(@_) == Z_OK) |
119 | ? STATUS_OK |
120 | : STATUS_ERROR ; |
121 | } |
122 | |
123 | |
124 | sub getLastBlockOffset |
125 | { |
126 | my $self = shift ; |
127 | $self->{Inf}->getLastBlockOffset(); |
128 | } |
129 | |
130 | sub getEndOffset |
131 | { |
132 | my $self = shift ; |
133 | $self->{Inf}->getEndOffset(); |
134 | } |
135 | |
136 | sub resetLastBlockByte |
137 | { |
138 | my $self = shift ; |
139 | $self->{Inf}->resetLastBlockByte(@_); |
140 | } |
141 | |
142 | sub createDeflateStream |
143 | { |
144 | my $self = shift ; |
145 | my $deflate = $self->{Inf}->createDeflateStream(@_); |
146 | return bless {'Def' => $deflate, |
147 | 'CompSize' => 0, |
148 | 'UnCompSize' => 0, |
149 | 'Error' => '', |
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150 | }, 'IO::Compress::Adapter::Deflate'; |
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151 | } |
152 | |
153 | 1; |
154 | |
155 | |
156 | __END__ |
157 | |