Commit | Line | Data |
1a6a8453 |
1 | |
2 | package IO::Uncompress::Base ; |
3 | |
4 | use strict ; |
5 | use warnings; |
6 | use bytes; |
7 | |
8 | our ($VERSION, @EXPORT_OK, %EXPORT_TAGS); |
9 | |
10 | $VERSION = '2.000_05'; |
11 | |
12 | use constant G_EOF => 0 ; |
13 | use constant G_ERR => -1 ; |
14 | |
15 | use Compress::Zlib::Common ; |
16 | use Compress::Zlib::ParseParameters ; |
17 | |
18 | use IO::File ; |
19 | use Symbol; |
20 | use Scalar::Util qw(readonly); |
21 | use List::Util qw(min); |
22 | use Carp ; |
23 | |
24 | %EXPORT_TAGS = ( ); |
25 | push @{ $EXPORT_TAGS{all} }, @EXPORT_OK ; |
26 | #Exporter::export_ok_tags('all') ; |
27 | |
28 | |
29 | sub smartRead |
30 | { |
31 | my $self = $_[0]; |
32 | my $out = $_[1]; |
33 | my $size = $_[2]; |
34 | $$out = "" ; |
35 | |
36 | my $offset = 0 ; |
37 | |
38 | |
39 | if ( length *$self->{Prime} ) { |
40 | #$$out = substr(*$self->{Prime}, 0, $size, '') ; |
41 | $$out = substr(*$self->{Prime}, 0, $size) ; |
42 | substr(*$self->{Prime}, 0, $size) = '' ; |
43 | if (length $$out == $size) { |
44 | #*$self->{InputLengthRemaining} -= length $$out; |
45 | return length $$out ; |
46 | } |
47 | $offset = length $$out ; |
48 | } |
49 | |
50 | my $get_size = $size - $offset ; |
51 | |
52 | if ( defined *$self->{InputLength} ) { |
53 | #*$self->{InputLengthRemaining} += length *$self->{Prime} ; |
54 | #*$self->{InputLengthRemaining} = *$self->{InputLength} |
55 | # if *$self->{InputLengthRemaining} > *$self->{InputLength}; |
56 | $get_size = min($get_size, *$self->{InputLengthRemaining}); |
57 | } |
58 | |
59 | if (defined *$self->{FH}) |
60 | { *$self->{FH}->read($$out, $get_size, $offset) } |
61 | elsif (defined *$self->{InputEvent}) { |
62 | my $got = 1 ; |
63 | while (length $$out < $size) { |
64 | last |
65 | if ($got = *$self->{InputEvent}->($$out, $get_size)) <= 0; |
66 | } |
67 | |
68 | if (length $$out > $size ) { |
69 | #*$self->{Prime} = substr($$out, $size, length($$out), ''); |
70 | *$self->{Prime} = substr($$out, $size, length($$out)); |
71 | substr($$out, $size, length($$out)) = ''; |
72 | } |
73 | |
74 | *$self->{EventEof} = 1 if $got <= 0 ; |
75 | } |
76 | else { |
77 | no warnings 'uninitialized'; |
78 | my $buf = *$self->{Buffer} ; |
79 | $$buf = '' unless defined $$buf ; |
80 | #$$out = '' unless defined $$out ; |
81 | substr($$out, $offset) = substr($$buf, *$self->{BufferOffset}, $get_size); |
82 | *$self->{BufferOffset} += length($$out) - $offset ; |
83 | } |
84 | |
85 | *$self->{InputLengthRemaining} -= length $$out; |
86 | |
87 | $self->saveStatus(length $$out < 0 ? STATUS_ERROR : 0) ; |
88 | |
89 | return length $$out; |
90 | } |
91 | |
92 | sub pushBack |
93 | { |
94 | my $self = shift ; |
95 | |
96 | return if ! defined $_[0] || length $_[0] == 0 ; |
97 | |
98 | if (defined *$self->{FH} || defined *$self->{InputEvent} ) { |
99 | *$self->{Prime} = $_[0] . *$self->{Prime} ; |
100 | } |
101 | else { |
102 | my $len = length $_[0]; |
103 | |
104 | if($len > *$self->{BufferOffset}) { |
105 | *$self->{Prime} = substr($_[0], 0, $len - *$self->{BufferOffset}) . *$self->{Prime} ; |
106 | *$self->{InputLengthRemaining} = *$self->{InputLength}; |
107 | *$self->{BufferOffset} = 0 |
108 | } |
109 | else { |
110 | *$self->{InputLengthRemaining} += length($_[0]); |
111 | *$self->{BufferOffset} -= length($_[0]) ; |
112 | } |
113 | } |
114 | } |
115 | |
116 | sub smartSeek |
117 | { |
118 | my $self = shift ; |
119 | my $offset = shift ; |
120 | my $truncate = shift; |
121 | #print "smartSeek to $offset\n"; |
122 | |
123 | # TODO -- need to take prime into account |
124 | if (defined *$self->{FH}) |
125 | { *$self->{FH}->seek($offset, SEEK_SET) } |
126 | else { |
127 | *$self->{BufferOffset} = $offset ; |
128 | substr(${ *$self->{Buffer} }, *$self->{BufferOffset}) = '' |
129 | if $truncate; |
130 | return 1; |
131 | } |
132 | } |
133 | |
134 | sub smartWrite |
135 | { |
136 | my $self = shift ; |
137 | my $out_data = shift ; |
138 | |
139 | if (defined *$self->{FH}) { |
140 | # flush needed for 5.8.0 |
141 | defined *$self->{FH}->write($out_data, length $out_data) && |
142 | defined *$self->{FH}->flush() ; |
143 | } |
144 | else { |
145 | my $buf = *$self->{Buffer} ; |
146 | substr($$buf, *$self->{BufferOffset}, length $out_data) = $out_data ; |
147 | *$self->{BufferOffset} += length($out_data) ; |
148 | return 1; |
149 | } |
150 | } |
151 | |
152 | sub smartReadExact |
153 | { |
154 | return $_[0]->smartRead($_[1], $_[2]) == $_[2]; |
155 | } |
156 | |
157 | sub smartEof |
158 | { |
159 | my ($self) = $_[0]; |
160 | |
161 | return 0 if length *$self->{Prime}; |
162 | |
163 | if (defined *$self->{FH}) |
164 | { *$self->{FH}->eof() } |
165 | elsif (defined *$self->{InputEvent}) |
166 | { *$self->{EventEof} } |
167 | else |
168 | { *$self->{BufferOffset} >= length(${ *$self->{Buffer} }) } |
169 | } |
170 | |
171 | sub clearError |
172 | { |
173 | my $self = shift ; |
174 | |
175 | *$self->{ErrorNo} = 0 ; |
176 | ${ *$self->{Error} } = '' ; |
177 | } |
178 | |
179 | sub saveStatus |
180 | { |
181 | my $self = shift ; |
182 | my $errno = shift() + 0 ; |
183 | #return $errno unless $errno || ! defined *$self->{ErrorNo}; |
184 | #return $errno unless $errno ; |
185 | |
186 | *$self->{ErrorNo} = $errno; |
187 | ${ *$self->{Error} } = '' ; |
188 | |
189 | return *$self->{ErrorNo} ; |
190 | } |
191 | |
192 | |
193 | sub saveErrorString |
194 | { |
195 | my $self = shift ; |
196 | my $retval = shift ; |
197 | |
198 | #return $retval if ${ *$self->{Error} }; |
199 | |
200 | ${ *$self->{Error} } = shift ; |
201 | *$self->{ErrorNo} = shift() + 0 if @_ ; |
202 | |
203 | #warn "saveErrorString: " . ${ *$self->{Error} } . " " . *$self->{Error} . "\n" ; |
204 | return $retval; |
205 | } |
206 | |
207 | sub croakError |
208 | { |
209 | my $self = shift ; |
210 | $self->saveErrorString(0, $_[0]); |
211 | croak $_[0]; |
212 | } |
213 | |
214 | |
215 | sub closeError |
216 | { |
217 | my $self = shift ; |
218 | my $retval = shift ; |
219 | |
220 | my $errno = *$self->{ErrorNo}; |
221 | my $error = ${ *$self->{Error} }; |
222 | |
223 | $self->close(); |
224 | |
225 | *$self->{ErrorNo} = $errno ; |
226 | ${ *$self->{Error} } = $error ; |
227 | |
228 | return $retval; |
229 | } |
230 | |
231 | sub error |
232 | { |
233 | my $self = shift ; |
234 | return ${ *$self->{Error} } ; |
235 | } |
236 | |
237 | sub errorNo |
238 | { |
239 | my $self = shift ; |
240 | return *$self->{ErrorNo}; |
241 | } |
242 | |
243 | sub HeaderError |
244 | { |
245 | my ($self) = shift; |
246 | return $self->saveErrorString(undef, "Header Error: $_[0]", STATUS_ERROR); |
247 | } |
248 | |
249 | sub TrailerError |
250 | { |
251 | my ($self) = shift; |
252 | return $self->saveErrorString(G_ERR, "Trailer Error: $_[0]", STATUS_ERROR); |
253 | } |
254 | |
255 | sub TruncatedHeader |
256 | { |
257 | my ($self) = shift; |
258 | return $self->HeaderError("Truncated in $_[0] Section"); |
259 | } |
260 | |
261 | sub checkParams |
262 | { |
263 | my $self = shift ; |
264 | my $class = shift ; |
265 | |
266 | my $got = shift || Compress::Zlib::ParseParameters::new(); |
267 | |
268 | my $Valid = { |
269 | 'BlockSize' => [1, 1, Parse_unsigned, 16 * 1024], |
270 | 'AutoClose' => [1, 1, Parse_boolean, 0], |
271 | 'Strict' => [1, 1, Parse_boolean, 0], |
272 | #'Lax' => [1, 1, Parse_boolean, 1], |
273 | 'Append' => [1, 1, Parse_boolean, 0], |
274 | 'Prime' => [1, 1, Parse_any, undef], |
275 | 'MultiStream' => [1, 1, Parse_boolean, 0], |
276 | 'Transparent' => [1, 1, Parse_any, 1], |
277 | 'Scan' => [1, 1, Parse_boolean, 0], |
278 | 'InputLength' => [1, 1, Parse_unsigned, undef], |
279 | 'BinModeOut' => [1, 1, Parse_boolean, 0], |
280 | |
281 | $self->getExtraParams(), |
282 | |
283 | |
284 | #'Todo - Revert to ordinary file on end Z_STREAM_END'=> 0, |
285 | # ContinueAfterEof |
286 | } ; |
287 | |
288 | |
289 | $got->parse($Valid, @_ ) |
290 | or $self->croakError("${class}: $got->{Error}") ; |
291 | |
292 | |
293 | return $got; |
294 | } |
295 | |
296 | sub _create |
297 | { |
298 | my $obj = shift; |
299 | my $got = shift; |
300 | my $append_mode = shift ; |
301 | |
302 | my $class = ref $obj; |
303 | $obj->croakError("$class: Missing Input parameter") |
304 | if ! @_ && ! $got ; |
305 | |
306 | my $inValue = shift ; |
307 | |
308 | if (! $got) |
309 | { |
310 | $got = $obj->checkParams($class, undef, @_) |
311 | or return undef ; |
312 | } |
313 | |
314 | my $inType = whatIsInput($inValue, 1); |
315 | |
316 | $obj->ckInputParam($class, $inValue, 1) |
317 | or return undef ; |
318 | |
319 | *$obj->{InNew} = 1; |
320 | |
321 | $obj->ckParams($got) |
322 | or $obj->croakError("${class}: $obj->{Error}"); |
323 | |
324 | if ($inType eq 'buffer' || $inType eq 'code') { |
325 | *$obj->{Buffer} = $inValue ; |
326 | *$obj->{InputEvent} = $inValue |
327 | if $inType eq 'code' ; |
328 | } |
329 | else { |
330 | if ($inType eq 'handle') { |
331 | *$obj->{FH} = $inValue ; |
332 | *$obj->{Handle} = 1 ; |
333 | # Need to rewind for Scan |
334 | #seek(*$obj->{FH}, 0, SEEK_SET) if $got->value('Scan'); |
335 | *$obj->{FH}->seek(0, SEEK_SET) if $got->value('Scan'); |
336 | } |
337 | else { |
338 | my $mode = '<'; |
339 | $mode = '+<' if $got->value('Scan'); |
340 | *$obj->{StdIO} = ($inValue eq '-'); |
341 | *$obj->{FH} = new IO::File "$mode $inValue" |
342 | or return $obj->saveErrorString(undef, "cannot open file '$inValue': $!", $!) ; |
343 | *$obj->{LineNo} = 0; |
344 | } |
345 | |
346 | setBinModeInput(*$obj->{FH}) ; |
347 | |
348 | my $buff = "" ; |
349 | *$obj->{Buffer} = \$buff ; |
350 | } |
351 | |
352 | |
353 | *$obj->{InputLength} = $got->parsed('InputLength') |
354 | ? $got->value('InputLength') |
355 | : undef ; |
356 | *$obj->{InputLengthRemaining} = $got->value('InputLength'); |
357 | *$obj->{BufferOffset} = 0 ; |
358 | *$obj->{AutoClose} = $got->value('AutoClose'); |
359 | *$obj->{Strict} = $got->value('Strict'); |
360 | #*$obj->{Strict} = ! $got->value('Lax'); |
361 | *$obj->{BlockSize} = $got->value('BlockSize'); |
362 | *$obj->{Append} = $got->value('Append'); |
363 | *$obj->{AppendOutput} = $append_mode || $got->value('Append'); |
364 | *$obj->{Transparent} = $got->value('Transparent'); |
365 | *$obj->{MultiStream} = $got->value('MultiStream'); |
366 | |
367 | # TODO - move these two into RawDeflate |
368 | *$obj->{Scan} = $got->value('Scan'); |
369 | *$obj->{ParseExtra} = $got->value('ParseExtra') |
370 | || $got->value('Strict') ; |
371 | #|| ! $got->value('Lax') ; |
372 | *$obj->{Type} = ''; |
373 | *$obj->{Prime} = $got->value('Prime') || '' ; |
374 | *$obj->{Pending} = ''; |
375 | *$obj->{Plain} = 0; |
376 | *$obj->{PlainBytesRead} = 0; |
377 | *$obj->{InflatedBytesRead} = 0; |
378 | *$obj->{UnCompSize_32bit} = 0; |
379 | *$obj->{TotalInflatedBytesRead} = 0; |
380 | *$obj->{NewStream} = 0 ; |
381 | *$obj->{EventEof} = 0 ; |
382 | *$obj->{ClassName} = $class ; |
383 | *$obj->{Params} = $got ; |
384 | |
385 | my $status = $obj->mkUncomp($class, $got); |
386 | |
387 | return undef |
388 | unless defined $status; |
389 | |
390 | if ( ! $status) { |
391 | return undef |
392 | unless *$obj->{Transparent}; |
393 | |
394 | $obj->clearError(); |
395 | *$obj->{Type} = 'plain'; |
396 | *$obj->{Plain} = 1; |
397 | #$status = $obj->mkIdentityUncomp($class, $got); |
398 | $obj->pushBack(*$obj->{HeaderPending}) ; |
399 | } |
400 | |
401 | push @{ *$obj->{InfoList} }, *$obj->{Info} ; |
402 | |
403 | $obj->saveStatus(0) ; |
404 | *$obj->{InNew} = 0; |
405 | *$obj->{Closed} = 0; |
406 | |
407 | return $obj; |
408 | } |
409 | |
410 | sub ckInputParam |
411 | { |
412 | my $self = shift ; |
413 | my $from = shift ; |
414 | my $inType = whatIsInput($_[0], $_[1]); |
415 | |
416 | $self->croakError("$from: input parameter not a filename, filehandle, array ref or scalar ref") |
417 | if ! $inType ; |
418 | |
419 | if ($inType eq 'filename' ) |
420 | { |
421 | $self->croakError("$from: input filename is undef or null string") |
422 | if ! defined $_[0] || $_[0] eq '' ; |
423 | |
424 | if ($_[0] ne '-' && ! -e $_[0] ) |
425 | { |
426 | return $self->saveErrorString(undef, |
427 | "input file '$_[0]' does not exist", STATUS_ERROR); |
428 | } |
429 | } |
430 | |
431 | return 1; |
432 | } |
433 | |
434 | |
435 | sub _inf |
436 | { |
437 | my $obj = shift ; |
438 | |
439 | my $class = (caller)[0] ; |
440 | my $name = (caller(1))[3] ; |
441 | |
442 | $obj->croakError("$name: expected at least 1 parameters\n") |
443 | unless @_ >= 1 ; |
444 | |
445 | my $input = shift ; |
446 | my $haveOut = @_ ; |
447 | my $output = shift ; |
448 | |
449 | |
450 | my $x = new Validator($class, *$obj->{Error}, $name, $input, $output) |
451 | or return undef ; |
452 | |
453 | push @_, $output if $haveOut && $x->{Hash}; |
454 | |
455 | my $got = $obj->checkParams($name, undef, @_) |
456 | or return undef ; |
457 | |
458 | $x->{Got} = $got ; |
459 | |
460 | if ($x->{Hash}) |
461 | { |
462 | while (my($k, $v) = each %$input) |
463 | { |
464 | $v = \$input->{$k} |
465 | unless defined $v ; |
466 | |
467 | $obj->_singleTarget($x, 1, $k, $v, @_) |
468 | or return undef ; |
469 | } |
470 | |
471 | return keys %$input ; |
472 | } |
473 | |
474 | if ($x->{GlobMap}) |
475 | { |
476 | $x->{oneInput} = 1 ; |
477 | foreach my $pair (@{ $x->{Pairs} }) |
478 | { |
479 | my ($from, $to) = @$pair ; |
480 | $obj->_singleTarget($x, 1, $from, $to, @_) |
481 | or return undef ; |
482 | } |
483 | |
484 | return scalar @{ $x->{Pairs} } ; |
485 | } |
486 | |
487 | #if ($x->{outType} eq 'array' || $x->{outType} eq 'hash') |
488 | if (! $x->{oneOutput} ) |
489 | { |
490 | my $inFile = ($x->{inType} eq 'filenames' |
491 | || $x->{inType} eq 'filename'); |
492 | |
493 | $x->{inType} = $inFile ? 'filename' : 'buffer'; |
494 | my $ot = $x->{outType} ; |
495 | $x->{outType} = 'buffer'; |
496 | |
497 | foreach my $in ($x->{oneInput} ? $input : @$input) |
498 | { |
499 | my $out ; |
500 | $x->{oneInput} = 1 ; |
501 | |
502 | $obj->_singleTarget($x, $inFile, $in, \$out, @_) |
503 | or return undef ; |
504 | |
505 | if ($ot eq 'array') |
506 | { push @$output, \$out } |
507 | else |
508 | { $output->{$in} = \$out } |
509 | } |
510 | |
511 | return 1 ; |
512 | } |
513 | |
514 | # finally the 1 to 1 and n to 1 |
515 | return $obj->_singleTarget($x, 1, $input, $output, @_); |
516 | |
517 | croak "should not be here" ; |
518 | } |
519 | |
520 | sub retErr |
521 | { |
522 | my $x = shift ; |
523 | my $string = shift ; |
524 | |
525 | ${ $x->{Error} } = $string ; |
526 | |
527 | return undef ; |
528 | } |
529 | |
530 | sub _singleTarget |
531 | { |
532 | my $self = shift ; |
533 | my $x = shift ; |
534 | my $inputIsFilename = shift; |
535 | my $input = shift; |
536 | my $output = shift; |
537 | |
538 | $x->{buff} = '' ; |
539 | |
540 | my $fh ; |
541 | if ($x->{outType} eq 'filename') { |
542 | my $mode = '>' ; |
543 | $mode = '>>' |
544 | if $x->{Got}->value('Append') ; |
545 | $x->{fh} = new IO::File "$mode $output" |
546 | or return retErr($x, "cannot open file '$output': $!") ; |
547 | binmode $x->{fh} if $x->{Got}->valueOrDefault('BinModeOut'); |
548 | |
549 | } |
550 | |
551 | elsif ($x->{outType} eq 'handle') { |
552 | $x->{fh} = $output; |
553 | binmode $x->{fh} if $x->{Got}->valueOrDefault('BinModeOut'); |
554 | if ($x->{Got}->value('Append')) { |
555 | seek($x->{fh}, 0, SEEK_END) |
556 | or return retErr($x, "Cannot seek to end of output filehandle: $!") ; |
557 | } |
558 | } |
559 | |
560 | |
561 | elsif ($x->{outType} eq 'buffer' ) |
562 | { |
563 | $$output = '' |
564 | unless $x->{Got}->value('Append'); |
565 | $x->{buff} = $output ; |
566 | } |
567 | |
568 | if ($x->{oneInput}) |
569 | { |
570 | defined $self->_rd2($x, $input, $inputIsFilename) |
571 | or return undef; |
572 | } |
573 | else |
574 | { |
575 | my $inputIsFilename = ($x->{inType} ne 'array'); |
576 | |
577 | for my $element ( ($x->{inType} eq 'hash') ? keys %$input : @$input) |
578 | { |
579 | defined $self->_rd2($x, $element, $inputIsFilename) |
580 | or return undef ; |
581 | } |
582 | } |
583 | |
584 | |
585 | if ( ($x->{outType} eq 'filename' && $output ne '-') || |
586 | ($x->{outType} eq 'handle' && $x->{Got}->value('AutoClose'))) { |
587 | $x->{fh}->close() |
588 | or return retErr($x, $!); |
589 | #or return $gunzip->saveErrorString(undef, $!, $!); |
590 | delete $x->{fh}; |
591 | } |
592 | |
593 | return 1 ; |
594 | } |
595 | |
596 | sub _rd2 |
597 | { |
598 | my $self = shift ; |
599 | my $x = shift ; |
600 | my $input = shift; |
601 | my $inputIsFilename = shift; |
602 | |
603 | my $z = createSelfTiedObject($x->{Class}, *$self->{Error}); |
604 | |
605 | $z->_create($x->{Got}, 1, $input, @_) |
606 | or return undef ; |
607 | |
608 | my $status ; |
609 | my $fh = $x->{fh}; |
610 | |
611 | while (($status = $z->read($x->{buff})) > 0) { |
612 | if ($fh) { |
613 | print $fh $x->{buff} |
614 | or return $z->saveErrorString(undef, "Error writing to output file: $!", $!); |
615 | $x->{buff} = '' ; |
616 | } |
617 | } |
618 | |
619 | return $z->closeError(undef) |
620 | if $status < 0 ; |
621 | |
622 | $z->close() |
623 | or return undef ; |
624 | |
625 | return 1 ; |
626 | } |
627 | |
628 | sub TIEHANDLE |
629 | { |
630 | return $_[0] if ref($_[0]); |
631 | die "OOPS\n" ; |
632 | |
633 | } |
634 | |
635 | sub UNTIE |
636 | { |
637 | my $self = shift ; |
638 | } |
639 | |
640 | |
641 | sub getHeaderInfo |
642 | { |
643 | my $self = shift ; |
644 | wantarray ? @{ *$self->{InfoList} } : *$self->{Info}; |
645 | } |
646 | |
647 | sub readBlock |
648 | { |
649 | my $self = shift ; |
650 | my $buff = shift ; |
651 | my $size = shift ; |
652 | |
653 | if (defined *$self->{CompressedInputLength}) { |
654 | if (*$self->{CompressedInputLengthRemaining} == 0) { |
655 | delete *$self->{CompressedInputLength}; |
656 | #$$buff = ''; |
657 | return STATUS_OK ; |
658 | } |
659 | $size = min($size, *$self->{CompressedInputLengthRemaining} ); |
660 | *$self->{CompressedInputLengthRemaining} -= $size ; |
661 | } |
662 | |
663 | my $status = $self->smartRead($buff, $size) ; |
664 | return $self->saveErrorString(STATUS_ERROR, "Error Reading Data") |
665 | if $status < 0 ; |
666 | |
667 | if ($status == 0 ) { |
668 | *$self->{Closed} = 1 ; |
669 | *$self->{EndStream} = 1 ; |
670 | return $self->saveErrorString(STATUS_ERROR, "unexpected end of file", STATUS_ERROR); |
671 | } |
672 | |
673 | return STATUS_OK; |
674 | |
675 | } |
676 | |
677 | sub postBlockChk |
678 | { |
679 | return STATUS_OK; |
680 | } |
681 | |
682 | sub _raw_read |
683 | { |
684 | # return codes |
685 | # >0 - ok, number of bytes read |
686 | # =0 - ok, eof |
687 | # <0 - not ok |
688 | |
689 | my $self = shift ; |
690 | |
691 | return G_EOF if *$self->{Closed} ; |
692 | #return G_EOF if !length *$self->{Pending} && *$self->{EndStream} ; |
693 | return G_EOF if *$self->{EndStream} ; |
694 | |
695 | my $buffer = shift ; |
696 | my $scan_mode = shift ; |
697 | |
698 | if (*$self->{Plain}) { |
699 | my $tmp_buff ; |
700 | my $len = $self->smartRead(\$tmp_buff, *$self->{BlockSize}) ; |
701 | |
702 | return $self->saveErrorString(G_ERR, "Error reading data: $!", $!) |
703 | if $len < 0 ; |
704 | |
705 | if ($len == 0 ) { |
706 | *$self->{EndStream} = 1 ; |
707 | } |
708 | else { |
709 | *$self->{PlainBytesRead} += $len ; |
710 | $$buffer .= $tmp_buff; |
711 | } |
712 | |
713 | return $len ; |
714 | } |
715 | |
716 | if (*$self->{NewStream}) { |
717 | |
718 | *$self->{NewStream} = 0 ; |
719 | *$self->{EndStream} = 0 ; |
720 | *$self->{Uncomp}->reset(); |
721 | |
722 | return G_ERR |
723 | unless my $magic = $self->ckMagic(); |
724 | *$self->{Info} = $self->readHeader($magic); |
725 | |
726 | return G_ERR unless defined *$self->{Info} ; |
727 | |
728 | push @{ *$self->{InfoList} }, *$self->{Info} ; |
729 | |
730 | # For the headers that actually uncompressed data, put the |
731 | # uncompressed data into the output buffer. |
732 | $$buffer .= *$self->{Pending} ; |
733 | my $len = length *$self->{Pending} ; |
734 | *$self->{Pending} = ''; |
735 | return $len; |
736 | } |
737 | |
738 | my $temp_buf ; |
739 | my $outSize = 0; |
740 | my $status = $self->readBlock(\$temp_buf, *$self->{BlockSize}, $outSize) ; |
741 | return G_ERR |
742 | if $status == STATUS_ERROR ; |
743 | |
744 | my $buf_len = 0; |
745 | if ($status == STATUS_OK) { |
746 | my $before_len = defined $$buffer ? length $$buffer : 0 ; |
747 | $status = *$self->{Uncomp}->uncompr(\$temp_buf, $buffer, |
748 | (defined *$self->{CompressedInputLength} && |
749 | *$self->{CompressedInputLengthRemaining} <= 0) || |
750 | $self->smartEof(), $outSize); |
751 | |
752 | return $self->saveErrorString(G_ERR, *$self->{Uncomp}{Error}, *$self->{Uncomp}{ErrorNo}) |
753 | if $self->saveStatus($status) == STATUS_ERROR; |
754 | |
755 | $self->postBlockChk($buffer) == STATUS_OK |
756 | or return G_ERR; |
757 | |
758 | #$buf_len = *$self->{Uncomp}->count(); |
759 | $buf_len = length($$buffer) - $before_len; |
760 | |
761 | |
762 | *$self->{InflatedBytesRead} += $buf_len ; |
763 | *$self->{TotalInflatedBytesRead} += $buf_len ; |
764 | my $rest = 0xFFFFFFFF - *$self->{UnCompSize_32bit} ; |
765 | if ($buf_len > $rest) { |
766 | *$self->{UnCompSize_32bit} = $buf_len - $rest - 1; |
767 | } |
768 | else { |
769 | *$self->{UnCompSize_32bit} += $buf_len ; |
770 | } |
771 | } |
772 | |
773 | if ($status == STATUS_ENDSTREAM) { |
774 | |
775 | *$self->{EndStream} = 1 ; |
776 | $self->pushBack($temp_buf) ; |
777 | $temp_buf = ''; |
778 | |
779 | my $trailer; |
780 | if (*$self->{Info}{TrailerLength}) |
781 | { |
782 | my $trailer_size = *$self->{Info}{TrailerLength} ; |
783 | |
784 | my $got = $self->smartRead(\$trailer, $trailer_size) ; |
785 | if ($got != $trailer_size) { |
786 | return $self->TrailerError("trailer truncated. Expected " . |
787 | "$trailer_size bytes, got $got") |
788 | if *$self->{Strict}; |
789 | $self->pushBack($trailer) ; |
790 | } |
791 | } |
792 | |
793 | $self->chkTrailer($trailer) == G_ERR |
794 | and return G_ERR; |
795 | |
796 | if (*$self->{MultiStream} && ! $self->smartEof()) { |
797 | #&& (length $temp_buf || ! $self->smartEof())){ |
798 | *$self->{NewStream} = 1 ; |
799 | *$self->{EndStream} = 0 ; |
800 | return $buf_len ; |
801 | } |
802 | |
803 | } |
804 | |
805 | |
806 | # return the number of uncompressed bytes read |
807 | return $buf_len ; |
808 | } |
809 | |
810 | #sub isEndStream |
811 | #{ |
812 | # my $self = shift ; |
813 | # return *$self->{NewStream} || |
814 | # *$self->{EndStream} ; |
815 | #} |
816 | |
817 | sub streamCount |
818 | { |
819 | my $self = shift ; |
820 | return 1 if ! defined *$self->{InfoList}; |
821 | return scalar @{ *$self->{InfoList} } ; |
822 | } |
823 | |
824 | sub read |
825 | { |
826 | # return codes |
827 | # >0 - ok, number of bytes read |
828 | # =0 - ok, eof |
829 | # <0 - not ok |
830 | |
831 | my $self = shift ; |
832 | |
833 | return G_EOF if *$self->{Closed} ; |
834 | return G_EOF if !length *$self->{Pending} && *$self->{EndStream} ; |
835 | |
836 | my $buffer ; |
837 | |
838 | #$self->croakError(*$self->{ClassName} . |
839 | # "::read: buffer parameter is read-only") |
840 | # if Compress::Zlib::_readonly_ref($_[0]); |
841 | |
842 | if (ref $_[0] ) { |
843 | $self->croakError(*$self->{ClassName} . "::read: buffer parameter is read-only") |
844 | if readonly(${ $_[0] }); |
845 | |
846 | $self->croakError(*$self->{ClassName} . "::read: not a scalar reference $_[0]" ) |
847 | unless ref $_[0] eq 'SCALAR' ; |
848 | $buffer = $_[0] ; |
849 | } |
850 | else { |
851 | $self->croakError(*$self->{ClassName} . "::read: buffer parameter is read-only") |
852 | if readonly($_[0]); |
853 | |
854 | $buffer = \$_[0] ; |
855 | } |
856 | |
857 | my $length = $_[1] ; |
858 | my $offset = $_[2] || 0; |
859 | |
860 | # the core read will return 0 if asked for 0 bytes |
861 | return 0 if defined $length && $length == 0 ; |
862 | |
863 | $length = $length || 0; |
864 | |
865 | $self->croakError(*$self->{ClassName} . "::read: length parameter is negative") |
866 | if $length < 0 ; |
867 | |
868 | $$buffer = '' unless *$self->{AppendOutput} || $offset ; |
869 | |
870 | # Short-circuit if this is a simple read, with no length |
871 | # or offset specified. |
872 | unless ( $length || $offset) { |
873 | if (length *$self->{Pending}) { |
874 | $$buffer .= *$self->{Pending} ; |
875 | my $len = length *$self->{Pending}; |
876 | *$self->{Pending} = '' ; |
877 | return $len ; |
878 | } |
879 | else { |
880 | my $len = 0; |
881 | $len = $self->_raw_read($buffer) |
882 | while ! *$self->{EndStream} && $len == 0 ; |
883 | return $len ; |
884 | } |
885 | } |
886 | |
887 | # Need to jump through more hoops - either length or offset |
888 | # or both are specified. |
889 | my $out_buffer = \*$self->{Pending} ; |
890 | |
891 | while (! *$self->{EndStream} && length($$out_buffer) < $length) |
892 | { |
893 | my $buf_len = $self->_raw_read($out_buffer); |
894 | return $buf_len |
895 | if $buf_len < 0 ; |
896 | } |
897 | |
898 | $length = length $$out_buffer |
899 | if length($$out_buffer) < $length ; |
900 | |
901 | if ($offset) { |
902 | $$buffer .= "\x00" x ($offset - length($$buffer)) |
903 | if $offset > length($$buffer) ; |
904 | #substr($$buffer, $offset) = substr($$out_buffer, 0, $length, '') ; |
905 | substr($$buffer, $offset) = substr($$out_buffer, 0, $length) ; |
906 | substr($$out_buffer, 0, $length) = '' ; |
907 | } |
908 | else { |
909 | #$$buffer .= substr($$out_buffer, 0, $length, '') ; |
910 | $$buffer .= substr($$out_buffer, 0, $length) ; |
911 | substr($$out_buffer, 0, $length) = '' ; |
912 | } |
913 | |
914 | return $length ; |
915 | } |
916 | |
917 | sub _getline |
918 | { |
919 | my $self = shift ; |
920 | |
921 | # Slurp Mode |
922 | if ( ! defined $/ ) { |
923 | my $data ; |
924 | 1 while $self->read($data) > 0 ; |
925 | return \$data ; |
926 | } |
927 | |
928 | # Paragraph Mode |
929 | if ( ! length $/ ) { |
930 | my $paragraph ; |
931 | while ($self->read($paragraph) > 0 ) { |
932 | if ($paragraph =~ s/^(.*?\n\n+)//s) { |
933 | *$self->{Pending} = $paragraph ; |
934 | my $par = $1 ; |
935 | return \$par ; |
936 | } |
937 | } |
938 | return \$paragraph; |
939 | } |
940 | |
941 | # Line Mode |
942 | { |
943 | my $line ; |
944 | my $endl = quotemeta($/); # quote in case $/ contains RE meta chars |
945 | while ($self->read($line) > 0 ) { |
946 | if ($line =~ s/^(.*?$endl)//s) { |
947 | *$self->{Pending} = $line ; |
948 | $. = ++ *$self->{LineNo} ; |
949 | my $l = $1 ; |
950 | return \$l ; |
951 | } |
952 | } |
953 | $. = ++ *$self->{LineNo} if defined($line); |
954 | return \$line; |
955 | } |
956 | } |
957 | |
958 | sub getline |
959 | { |
960 | my $self = shift; |
961 | my $current_append = *$self->{AppendOutput} ; |
962 | *$self->{AppendOutput} = 1; |
963 | my $lineref = $self->_getline(); |
964 | *$self->{AppendOutput} = $current_append; |
965 | return $$lineref ; |
966 | } |
967 | |
968 | sub getlines |
969 | { |
970 | my $self = shift; |
971 | $self->croakError(*$self->{ClassName} . |
972 | "::getlines: called in scalar context\n") unless wantarray; |
973 | my($line, @lines); |
974 | push(@lines, $line) while defined($line = $self->getline); |
975 | return @lines; |
976 | } |
977 | |
978 | sub READLINE |
979 | { |
980 | goto &getlines if wantarray; |
981 | goto &getline; |
982 | } |
983 | |
984 | sub getc |
985 | { |
986 | my $self = shift; |
987 | my $buf; |
988 | return $buf if $self->read($buf, 1); |
989 | return undef; |
990 | } |
991 | |
992 | sub ungetc |
993 | { |
994 | my $self = shift; |
995 | *$self->{Pending} = "" unless defined *$self->{Pending} ; |
996 | *$self->{Pending} = $_[0] . *$self->{Pending} ; |
997 | } |
998 | |
999 | |
1000 | sub trailingData |
1001 | { |
1002 | my $self = shift ; |
1003 | #return \"" if ! defined *$self->{Trailing} ; |
1004 | #return \*$self->{Trailing} ; |
1005 | |
1006 | if (defined *$self->{FH} || defined *$self->{InputEvent} ) { |
1007 | return *$self->{Prime} ; |
1008 | } |
1009 | else { |
1010 | my $buf = *$self->{Buffer} ; |
1011 | my $offset = *$self->{BufferOffset} ; |
1012 | return substr($$buf, $offset, -1) ; |
1013 | } |
1014 | } |
1015 | |
1016 | |
1017 | sub eof |
1018 | { |
1019 | my $self = shift ; |
1020 | |
1021 | return (*$self->{Closed} || |
1022 | (!length *$self->{Pending} |
1023 | && ( $self->smartEof() || *$self->{EndStream}))) ; |
1024 | } |
1025 | |
1026 | sub tell |
1027 | { |
1028 | my $self = shift ; |
1029 | |
1030 | my $in ; |
1031 | if (*$self->{Plain}) { |
1032 | $in = *$self->{PlainBytesRead} ; |
1033 | } |
1034 | else { |
1035 | $in = *$self->{TotalInflatedBytesRead} ; |
1036 | } |
1037 | |
1038 | my $pending = length *$self->{Pending} ; |
1039 | |
1040 | return 0 if $pending > $in ; |
1041 | return $in - $pending ; |
1042 | } |
1043 | |
1044 | sub close |
1045 | { |
1046 | # todo - what to do if close is called before the end of the gzip file |
1047 | # do we remember any trailing data? |
1048 | my $self = shift ; |
1049 | |
1050 | return 1 if *$self->{Closed} ; |
1051 | |
1052 | untie *$self |
1053 | if $] >= 5.008 ; |
1054 | |
1055 | my $status = 1 ; |
1056 | |
1057 | if (defined *$self->{FH}) { |
1058 | if ((! *$self->{Handle} || *$self->{AutoClose}) && ! *$self->{StdIO}) { |
1059 | #if ( *$self->{AutoClose}) { |
1060 | $! = 0 ; |
1061 | $status = *$self->{FH}->close(); |
1062 | return $self->saveErrorString(0, $!, $!) |
1063 | if !*$self->{InNew} && $self->saveStatus($!) != 0 ; |
1064 | } |
1065 | delete *$self->{FH} ; |
1066 | $! = 0 ; |
1067 | } |
1068 | *$self->{Closed} = 1 ; |
1069 | |
1070 | return 1; |
1071 | } |
1072 | |
1073 | sub DESTROY |
1074 | { |
1075 | my $self = shift ; |
1076 | $self->close() ; |
1077 | } |
1078 | |
1079 | sub seek |
1080 | { |
1081 | my $self = shift ; |
1082 | my $position = shift; |
1083 | my $whence = shift ; |
1084 | |
1085 | my $here = $self->tell() ; |
1086 | my $target = 0 ; |
1087 | |
1088 | |
1089 | if ($whence == SEEK_SET) { |
1090 | $target = $position ; |
1091 | } |
1092 | elsif ($whence == SEEK_CUR) { |
1093 | $target = $here + $position ; |
1094 | } |
1095 | elsif ($whence == SEEK_END) { |
1096 | $target = $position ; |
1097 | $self->croakError(*$self->{ClassName} . "::seek: SEEK_END not allowed") ; |
1098 | } |
1099 | else { |
1100 | $self->croakError(*$self->{ClassName} ."::seek: unknown value, $whence, for whence parameter"); |
1101 | } |
1102 | |
1103 | # short circuit if seeking to current offset |
1104 | return 1 if $target == $here ; |
1105 | |
1106 | # Outlaw any attempt to seek backwards |
1107 | $self->croakError( *$self->{ClassName} ."::seek: cannot seek backwards") |
1108 | if $target < $here ; |
1109 | |
1110 | # Walk the file to the new offset |
1111 | my $offset = $target - $here ; |
1112 | |
1113 | my $buffer ; |
1114 | $self->read($buffer, $offset) == $offset |
1115 | or return 0 ; |
1116 | |
1117 | return 1 ; |
1118 | } |
1119 | |
1120 | sub fileno |
1121 | { |
1122 | my $self = shift ; |
1123 | return defined *$self->{FH} |
1124 | ? fileno *$self->{FH} |
1125 | : undef ; |
1126 | } |
1127 | |
1128 | sub binmode |
1129 | { |
1130 | 1; |
1131 | # my $self = shift ; |
1132 | # return defined *$self->{FH} |
1133 | # ? binmode *$self->{FH} |
1134 | # : 1 ; |
1135 | } |
1136 | |
1137 | *BINMODE = \&binmode; |
1138 | *SEEK = \&seek; |
1139 | *READ = \&read; |
1140 | *sysread = \&read; |
1141 | *TELL = \&tell; |
1142 | *EOF = \&eof; |
1143 | |
1144 | *FILENO = \&fileno; |
1145 | *CLOSE = \&close; |
1146 | |
1147 | sub _notAvailable |
1148 | { |
1149 | my $name = shift ; |
1150 | #return sub { croak "$name Not Available" ; } ; |
1151 | return sub { croak "$name Not Available: File opened only for intput" ; } ; |
1152 | } |
1153 | |
1154 | |
1155 | *print = _notAvailable('print'); |
1156 | *PRINT = _notAvailable('print'); |
1157 | *printf = _notAvailable('printf'); |
1158 | *PRINTF = _notAvailable('printf'); |
1159 | *write = _notAvailable('write'); |
1160 | *WRITE = _notAvailable('write'); |
1161 | |
1162 | #*sysread = \&read; |
1163 | #*syswrite = \&_notAvailable; |
1164 | |
1165 | #package IO::_infScan ; |
1166 | # |
1167 | #*_raw_read = \&IO::Uncompress::Base::_raw_read ; |
1168 | #*smartRead = \&IO::Uncompress::Base::smartRead ; |
1169 | #*smartWrite = \&IO::Uncompress::Base::smartWrite ; |
1170 | #*smartSeek = \&IO::Uncompress::Base::smartSeek ; |
1171 | |
1172 | #sub mkIdentityUncomp |
1173 | #{ |
1174 | # my $self = shift ; |
1175 | # my $class = shift ; |
1176 | # my $got = shift ; |
1177 | # |
1178 | # *$self->{Uncomp} = UncompressPlugin::Identity::mkUncompObject($self, $class, $got) |
1179 | # or return undef; |
1180 | # |
1181 | # return 1; |
1182 | # |
1183 | #} |
1184 | # |
1185 | # |
1186 | #package UncompressPlugin::Identity; |
1187 | # |
1188 | #use strict ; |
1189 | #use warnings; |
1190 | # |
1191 | #our ($VERSION, @ISA, @EXPORT); |
1192 | # |
1193 | #$VERSION = '2.000_05'; |
1194 | # |
1195 | #use constant STATUS_OK => 0; |
1196 | #use constant STATUS_ENDSTREAM => 1; |
1197 | #use constant STATUS_ERROR => 2; |
1198 | # |
1199 | #sub mkUncompObject |
1200 | #{ |
1201 | # my $class = shift ; |
1202 | # |
1203 | # bless { 'CompSize' => 0, |
1204 | # 'UnCompSize' => 0, |
1205 | # 'CRC32' => 0, |
1206 | # 'ADLER32' => 0, |
1207 | # }, __PACKAGE__ ; |
1208 | #} |
1209 | # |
1210 | #sub uncompr |
1211 | #{ |
1212 | # my $self = shift ; |
1213 | # my $from = shift ; |
1214 | # my $to = shift ; |
1215 | # my $eof = shift ; |
1216 | # |
1217 | # |
1218 | # $self->{CompSize} += length $$from ; |
1219 | # $self->{UnCompSize} = $self->{CompSize} ; |
1220 | # |
1221 | # $$to = $$from ; |
1222 | # |
1223 | # return STATUS_ENDSTREAM if $eof; |
1224 | # return STATUS_OK ; |
1225 | #} |
1226 | # |
1227 | #sub count |
1228 | #{ |
1229 | # my $self = shift ; |
1230 | # return $self->{UnCompSize} ; |
1231 | #} |
1232 | # |
1233 | #sub sync |
1234 | #{ |
1235 | # return STATUS_OK ; |
1236 | #} |
1237 | # |
1238 | # |
1239 | #sub reset |
1240 | #{ |
1241 | # return STATUS_OK ; |
1242 | #} |
1243 | |
1244 | |
1245 | package IO::Uncompress::Base ; |
1246 | |
1247 | |
1248 | 1 ; |
1249 | __END__ |
1250 | |