Commit | Line | Data |
---|---|---|
642e522c RGS |
1 | |
2 | package IO::Uncompress::Gunzip ; | |
3 | ||
4 | require 5.004 ; | |
5 | ||
6 | # for RFC1952 | |
7 | ||
8 | use strict ; | |
9 | use warnings; | |
a02d0f6f | 10 | use bytes; |
642e522c | 11 | |
93d092e2 | 12 | use IO::Uncompress::RawInflate 2.005 ; |
1a6a8453 | 13 | |
93d092e2 PM |
14 | use Compress::Raw::Zlib 2.005 qw( crc32 ) ; |
15 | use IO::Compress::Base::Common 2.005 qw(:Status createSelfTiedObject); | |
16 | use IO::Compress::Gzip::Constants 2.005 ; | |
17 | use IO::Compress::Zlib::Extra 2.005 ; | |
1a6a8453 | 18 | |
642e522c RGS |
19 | require Exporter ; |
20 | ||
21 | our ($VERSION, @ISA, @EXPORT_OK, %EXPORT_TAGS, $GunzipError); | |
22 | ||
1a6a8453 | 23 | @ISA = qw( Exporter IO::Uncompress::RawInflate ); |
642e522c | 24 | @EXPORT_OK = qw( $GunzipError gunzip ); |
1a6a8453 | 25 | %EXPORT_TAGS = %IO::Uncompress::RawInflate::DEFLATE_CONSTANTS ; |
642e522c RGS |
26 | push @{ $EXPORT_TAGS{all} }, @EXPORT_OK ; |
27 | Exporter::export_ok_tags('all'); | |
28 | ||
642e522c RGS |
29 | $GunzipError = ''; |
30 | ||
93d092e2 | 31 | $VERSION = '2.005'; |
642e522c | 32 | |
1a6a8453 | 33 | sub new |
642e522c | 34 | { |
1a6a8453 PM |
35 | my $class = shift ; |
36 | $GunzipError = ''; | |
37 | my $obj = createSelfTiedObject($class, \$GunzipError); | |
642e522c | 38 | |
1a6a8453 | 39 | $obj->_create(undef, 0, @_); |
642e522c RGS |
40 | } |
41 | ||
1a6a8453 | 42 | sub gunzip |
642e522c | 43 | { |
1a6a8453 PM |
44 | my $obj = createSelfTiedObject(undef, \$GunzipError); |
45 | return $obj->_inf(@_) ; | |
642e522c RGS |
46 | } |
47 | ||
1a6a8453 | 48 | sub getExtraParams |
642e522c | 49 | { |
93d092e2 | 50 | use IO::Compress::Base::Common 2.005 qw(:Parse); |
1a6a8453 | 51 | return ( 'ParseExtra' => [1, 1, Parse_boolean, 0] ) ; |
642e522c RGS |
52 | } |
53 | ||
1a6a8453 | 54 | sub ckParams |
642e522c | 55 | { |
1a6a8453 PM |
56 | my $self = shift ; |
57 | my $got = shift ; | |
642e522c | 58 | |
1a6a8453 PM |
59 | # gunzip always needs crc32 |
60 | $got->value('CRC32' => 1); | |
642e522c | 61 | |
1a6a8453 | 62 | return 1; |
642e522c RGS |
63 | } |
64 | ||
1a6a8453 | 65 | sub ckMagic |
642e522c | 66 | { |
1a6a8453 | 67 | my $self = shift; |
642e522c | 68 | |
1a6a8453 PM |
69 | my $magic ; |
70 | $self->smartReadExact(\$magic, GZIP_ID_SIZE); | |
642e522c | 71 | |
1a6a8453 | 72 | *$self->{HeaderPending} = $magic ; |
642e522c | 73 | |
1a6a8453 PM |
74 | return $self->HeaderError("Minimum header size is " . |
75 | GZIP_MIN_HEADER_SIZE . " bytes") | |
76 | if length $magic != GZIP_ID_SIZE ; | |
642e522c | 77 | |
1a6a8453 PM |
78 | return $self->HeaderError("Bad Magic") |
79 | if ! isGzipMagic($magic) ; | |
642e522c | 80 | |
1a6a8453 | 81 | *$self->{Type} = 'rfc1952'; |
642e522c | 82 | |
1a6a8453 | 83 | return $magic ; |
642e522c RGS |
84 | } |
85 | ||
1a6a8453 | 86 | sub readHeader |
642e522c | 87 | { |
1a6a8453 PM |
88 | my $self = shift; |
89 | my $magic = shift; | |
642e522c | 90 | |
1a6a8453 | 91 | return $self->_readGzipHeader($magic); |
642e522c RGS |
92 | } |
93 | ||
1a6a8453 | 94 | sub chkTrailer |
642e522c | 95 | { |
1a6a8453 PM |
96 | my $self = shift; |
97 | my $trailer = shift; | |
642e522c | 98 | |
1a6a8453 PM |
99 | # Check CRC & ISIZE |
100 | my ($CRC32, $ISIZE) = unpack("V V", $trailer) ; | |
101 | *$self->{Info}{CRC32} = $CRC32; | |
102 | *$self->{Info}{ISIZE} = $ISIZE; | |
103 | ||
104 | if (*$self->{Strict}) { | |
105 | return $self->TrailerError("CRC mismatch") | |
106 | if $CRC32 != *$self->{Uncomp}->crc32() ; | |
107 | ||
e7d45986 | 108 | my $exp_isize = *$self->{UnCompSize}->get32bit(); |
1a6a8453 PM |
109 | return $self->TrailerError("ISIZE mismatch. Got $ISIZE" |
110 | . ", expected $exp_isize") | |
111 | if $ISIZE != $exp_isize ; | |
642e522c RGS |
112 | } |
113 | ||
a02d0f6f | 114 | return STATUS_OK; |
1a6a8453 | 115 | } |
642e522c | 116 | |
1a6a8453 PM |
117 | sub isGzipMagic |
118 | { | |
119 | my $buffer = shift ; | |
120 | return 0 if length $buffer < GZIP_ID_SIZE ; | |
121 | my ($id1, $id2) = unpack("C C", $buffer) ; | |
122 | return $id1 == GZIP_ID1 && $id2 == GZIP_ID2 ; | |
642e522c RGS |
123 | } |
124 | ||
1a6a8453 | 125 | sub _readFullGzipHeader($) |
642e522c | 126 | { |
1a6a8453 PM |
127 | my ($self) = @_ ; |
128 | my $magic = '' ; | |
642e522c | 129 | |
1a6a8453 | 130 | $self->smartReadExact(\$magic, GZIP_ID_SIZE); |
642e522c | 131 | |
1a6a8453 | 132 | *$self->{HeaderPending} = $magic ; |
642e522c | 133 | |
1a6a8453 PM |
134 | return $self->HeaderError("Minimum header size is " . |
135 | GZIP_MIN_HEADER_SIZE . " bytes") | |
136 | if length $magic != GZIP_ID_SIZE ; | |
642e522c | 137 | |
642e522c | 138 | |
1a6a8453 PM |
139 | return $self->HeaderError("Bad Magic") |
140 | if ! isGzipMagic($magic) ; | |
642e522c | 141 | |
1a6a8453 PM |
142 | my $status = $self->_readGzipHeader($magic); |
143 | delete *$self->{Transparent} if ! defined $status ; | |
144 | return $status ; | |
642e522c RGS |
145 | } |
146 | ||
1a6a8453 | 147 | sub _readGzipHeader($) |
642e522c | 148 | { |
1a6a8453 PM |
149 | my ($self, $magic) = @_ ; |
150 | my ($HeaderCRC) ; | |
151 | my ($buffer) = '' ; | |
642e522c | 152 | |
1a6a8453 PM |
153 | $self->smartReadExact(\$buffer, GZIP_MIN_HEADER_SIZE - GZIP_ID_SIZE) |
154 | or return $self->HeaderError("Minimum header size is " . | |
155 | GZIP_MIN_HEADER_SIZE . " bytes") ; | |
642e522c | 156 | |
1a6a8453 PM |
157 | my $keep = $magic . $buffer ; |
158 | *$self->{HeaderPending} = $keep ; | |
642e522c | 159 | |
1a6a8453 PM |
160 | # now split out the various parts |
161 | my ($cm, $flag, $mtime, $xfl, $os) = unpack("C C V C C", $buffer) ; | |
642e522c | 162 | |
1a6a8453 PM |
163 | $cm == GZIP_CM_DEFLATED |
164 | or return $self->HeaderError("Not Deflate (CM is $cm)") ; | |
642e522c | 165 | |
1a6a8453 PM |
166 | # check for use of reserved bits |
167 | return $self->HeaderError("Use of Reserved Bits in FLG field.") | |
168 | if $flag & GZIP_FLG_RESERVED ; | |
642e522c | 169 | |
1a6a8453 PM |
170 | my $EXTRA ; |
171 | my @EXTRA = () ; | |
172 | if ($flag & GZIP_FLG_FEXTRA) { | |
173 | $EXTRA = "" ; | |
174 | $self->smartReadExact(\$buffer, GZIP_FEXTRA_HEADER_SIZE) | |
175 | or return $self->TruncatedHeader("FEXTRA Length") ; | |
642e522c | 176 | |
1a6a8453 PM |
177 | my ($XLEN) = unpack("v", $buffer) ; |
178 | $self->smartReadExact(\$EXTRA, $XLEN) | |
179 | or return $self->TruncatedHeader("FEXTRA Body"); | |
180 | $keep .= $buffer . $EXTRA ; | |
642e522c | 181 | |
1a6a8453 | 182 | if ($XLEN && *$self->{'ParseExtra'}) { |
c70c1701 PM |
183 | my $bad = IO::Compress::Zlib::Extra::parseRawExtra($EXTRA, |
184 | \@EXTRA, 1, 1); | |
185 | return $self->HeaderError($bad) | |
186 | if defined $bad; | |
1a6a8453 PM |
187 | } |
188 | } | |
642e522c | 189 | |
1a6a8453 PM |
190 | my $origname ; |
191 | if ($flag & GZIP_FLG_FNAME) { | |
192 | $origname = "" ; | |
193 | while (1) { | |
194 | $self->smartReadExact(\$buffer, 1) | |
195 | or return $self->TruncatedHeader("FNAME"); | |
196 | last if $buffer eq GZIP_NULL_BYTE ; | |
197 | $origname .= $buffer | |
198 | } | |
199 | $keep .= $origname . GZIP_NULL_BYTE ; | |
642e522c | 200 | |
1a6a8453 PM |
201 | return $self->HeaderError("Non ISO 8859-1 Character found in Name") |
202 | if *$self->{Strict} && $origname =~ /$GZIP_FNAME_INVALID_CHAR_RE/o ; | |
203 | } | |
642e522c | 204 | |
1a6a8453 PM |
205 | my $comment ; |
206 | if ($flag & GZIP_FLG_FCOMMENT) { | |
207 | $comment = ""; | |
208 | while (1) { | |
209 | $self->smartReadExact(\$buffer, 1) | |
210 | or return $self->TruncatedHeader("FCOMMENT"); | |
211 | last if $buffer eq GZIP_NULL_BYTE ; | |
212 | $comment .= $buffer | |
213 | } | |
214 | $keep .= $comment . GZIP_NULL_BYTE ; | |
642e522c | 215 | |
1a6a8453 PM |
216 | return $self->HeaderError("Non ISO 8859-1 Character found in Comment") |
217 | if *$self->{Strict} && $comment =~ /$GZIP_FCOMMENT_INVALID_CHAR_RE/o ; | |
218 | } | |
642e522c | 219 | |
1a6a8453 PM |
220 | if ($flag & GZIP_FLG_FHCRC) { |
221 | $self->smartReadExact(\$buffer, GZIP_FHCRC_SIZE) | |
222 | or return $self->TruncatedHeader("FHCRC"); | |
642e522c | 223 | |
1a6a8453 PM |
224 | $HeaderCRC = unpack("v", $buffer) ; |
225 | my $crc16 = crc32($keep) & 0xFF ; | |
642e522c | 226 | |
1a6a8453 PM |
227 | return $self->HeaderError("CRC16 mismatch.") |
228 | if *$self->{Strict} && $crc16 != $HeaderCRC; | |
642e522c | 229 | |
1a6a8453 PM |
230 | $keep .= $buffer ; |
231 | } | |
642e522c | 232 | |
1a6a8453 PM |
233 | # Assume compression method is deflated for xfl tests |
234 | #if ($xfl) { | |
235 | #} | |
642e522c | 236 | |
1a6a8453 | 237 | *$self->{Type} = 'rfc1952'; |
642e522c | 238 | |
1a6a8453 PM |
239 | return { |
240 | 'Type' => 'rfc1952', | |
241 | 'FingerprintLength' => 2, | |
242 | 'HeaderLength' => length $keep, | |
243 | 'TrailerLength' => GZIP_TRAILER_SIZE, | |
244 | 'Header' => $keep, | |
245 | 'isMinimalHeader' => $keep eq GZIP_MINIMUM_HEADER ? 1 : 0, | |
642e522c | 246 | |
1a6a8453 PM |
247 | 'MethodID' => $cm, |
248 | 'MethodName' => $cm == GZIP_CM_DEFLATED ? "Deflated" : "Unknown" , | |
249 | 'TextFlag' => $flag & GZIP_FLG_FTEXT ? 1 : 0, | |
250 | 'HeaderCRCFlag' => $flag & GZIP_FLG_FHCRC ? 1 : 0, | |
251 | 'NameFlag' => $flag & GZIP_FLG_FNAME ? 1 : 0, | |
252 | 'CommentFlag' => $flag & GZIP_FLG_FCOMMENT ? 1 : 0, | |
253 | 'ExtraFlag' => $flag & GZIP_FLG_FEXTRA ? 1 : 0, | |
254 | 'Name' => $origname, | |
255 | 'Comment' => $comment, | |
256 | 'Time' => $mtime, | |
257 | 'OsID' => $os, | |
258 | 'OsName' => defined $GZIP_OS_Names{$os} | |
259 | ? $GZIP_OS_Names{$os} : "Unknown", | |
260 | 'HeaderCRC' => $HeaderCRC, | |
261 | 'Flags' => $flag, | |
262 | 'ExtraFlags' => $xfl, | |
263 | 'ExtraFieldRaw' => $EXTRA, | |
264 | 'ExtraField' => [ @EXTRA ], | |
642e522c | 265 | |
642e522c | 266 | |
1a6a8453 PM |
267 | #'CompSize'=> $compsize, |
268 | #'CRC32'=> $CRC32, | |
269 | #'OrigSize'=> $ISIZE, | |
270 | } | |
642e522c RGS |
271 | } |
272 | ||
273 | ||
1a6a8453 | 274 | 1; |
642e522c | 275 | |
642e522c RGS |
276 | __END__ |
277 | ||
278 | ||
279 | =head1 NAME | |
280 | ||
a02d0f6f | 281 | |
cb7abd7f PM |
282 | |
283 | IO::Uncompress::Gunzip - Read RFC 1952 files/buffers | |
284 | ||
642e522c | 285 | |
a02d0f6f | 286 | |
642e522c RGS |
287 | =head1 SYNOPSIS |
288 | ||
289 | use IO::Uncompress::Gunzip qw(gunzip $GunzipError) ; | |
290 | ||
291 | my $status = gunzip $input => $output [,OPTS] | |
292 | or die "gunzip failed: $GunzipError\n"; | |
293 | ||
294 | my $z = new IO::Uncompress::Gunzip $input [OPTS] | |
295 | or die "gunzip failed: $GunzipError\n"; | |
296 | ||
297 | $status = $z->read($buffer) | |
298 | $status = $z->read($buffer, $length) | |
299 | $status = $z->read($buffer, $length, $offset) | |
300 | $line = $z->getline() | |
301 | $char = $z->getc() | |
302 | $char = $z->ungetc() | |
a02d0f6f RGS |
303 | $char = $z->opened() |
304 | ||
642e522c | 305 | $status = $z->inflateSync() |
a02d0f6f | 306 | |
e7d45986 PM |
307 | $data = $z->trailingData() |
308 | $status = $z->nextStream() | |
642e522c RGS |
309 | $data = $z->getHeaderInfo() |
310 | $z->tell() | |
311 | $z->seek($position, $whence) | |
312 | $z->binmode() | |
313 | $z->fileno() | |
314 | $z->eof() | |
315 | $z->close() | |
316 | ||
317 | $GunzipError ; | |
318 | ||
319 | # IO::File mode | |
320 | ||
321 | <$z> | |
322 | read($z, $buffer); | |
323 | read($z, $buffer, $length); | |
324 | read($z, $buffer, $length, $offset); | |
325 | tell($z) | |
326 | seek($z, $position, $whence) | |
327 | binmode($z) | |
328 | fileno($z) | |
329 | eof($z) | |
330 | close($z) | |
331 | ||
332 | ||
333 | =head1 DESCRIPTION | |
334 | ||
335 | ||
336 | ||
1a6a8453 | 337 | This module provides a Perl interface that allows the reading of |
642e522c RGS |
338 | files/buffers that conform to RFC 1952. |
339 | ||
1a6a8453 | 340 | For writing RFC 1952 files/buffers, see the companion module IO::Compress::Gzip. |
642e522c RGS |
341 | |
342 | ||
343 | ||
cb7abd7f PM |
344 | |
345 | ||
642e522c RGS |
346 | =head1 Functional Interface |
347 | ||
1a6a8453 PM |
348 | A top-level function, C<gunzip>, is provided to carry out |
349 | "one-shot" uncompression between buffers and/or files. For finer | |
350 | control over the uncompression process, see the L</"OO Interface"> | |
351 | section. | |
642e522c RGS |
352 | |
353 | use IO::Uncompress::Gunzip qw(gunzip $GunzipError) ; | |
354 | ||
355 | gunzip $input => $output [,OPTS] | |
356 | or die "gunzip failed: $GunzipError\n"; | |
357 | ||
1a6a8453 | 358 | |
642e522c RGS |
359 | |
360 | The functional interface needs Perl5.005 or better. | |
361 | ||
362 | ||
363 | =head2 gunzip $input => $output [, OPTS] | |
364 | ||
1a6a8453 PM |
365 | |
366 | C<gunzip> expects at least two parameters, C<$input> and C<$output>. | |
642e522c RGS |
367 | |
368 | =head3 The C<$input> parameter | |
369 | ||
370 | The parameter, C<$input>, is used to define the source of | |
371 | the compressed data. | |
372 | ||
373 | It can take one of the following forms: | |
374 | ||
375 | =over 5 | |
376 | ||
377 | =item A filename | |
378 | ||
379 | If the C<$input> parameter is a simple scalar, it is assumed to be a | |
380 | filename. This file will be opened for reading and the input data | |
381 | will be read from it. | |
382 | ||
383 | =item A filehandle | |
384 | ||
385 | If the C<$input> parameter is a filehandle, the input data will be | |
386 | read from it. | |
387 | The string '-' can be used as an alias for standard input. | |
388 | ||
389 | =item A scalar reference | |
390 | ||
391 | If C<$input> is a scalar reference, the input data will be read | |
392 | from C<$$input>. | |
393 | ||
394 | =item An array reference | |
395 | ||
1a6a8453 PM |
396 | If C<$input> is an array reference, each element in the array must be a |
397 | filename. | |
398 | ||
399 | The input data will be read from each file in turn. | |
400 | ||
642e522c | 401 | The complete array will be walked to ensure that it only |
1a6a8453 PM |
402 | contains valid filenames before any data is uncompressed. |
403 | ||
404 | ||
642e522c RGS |
405 | |
406 | =item An Input FileGlob string | |
407 | ||
408 | If C<$input> is a string that is delimited by the characters "<" and ">" | |
409 | C<gunzip> will assume that it is an I<input fileglob string>. The | |
410 | input is the list of files that match the fileglob. | |
411 | ||
412 | If the fileglob does not match any files ... | |
413 | ||
414 | See L<File::GlobMapper|File::GlobMapper> for more details. | |
415 | ||
416 | ||
417 | =back | |
418 | ||
419 | If the C<$input> parameter is any other type, C<undef> will be returned. | |
420 | ||
421 | ||
422 | ||
423 | =head3 The C<$output> parameter | |
424 | ||
425 | The parameter C<$output> is used to control the destination of the | |
426 | uncompressed data. This parameter can take one of these forms. | |
427 | ||
428 | =over 5 | |
429 | ||
430 | =item A filename | |
431 | ||
1a6a8453 PM |
432 | If the C<$output> parameter is a simple scalar, it is assumed to be a |
433 | filename. This file will be opened for writing and the uncompressed | |
434 | data will be written to it. | |
642e522c RGS |
435 | |
436 | =item A filehandle | |
437 | ||
1a6a8453 PM |
438 | If the C<$output> parameter is a filehandle, the uncompressed data |
439 | will be written to it. | |
642e522c RGS |
440 | The string '-' can be used as an alias for standard output. |
441 | ||
442 | ||
443 | =item A scalar reference | |
444 | ||
1a6a8453 PM |
445 | If C<$output> is a scalar reference, the uncompressed data will be |
446 | stored in C<$$output>. | |
642e522c RGS |
447 | |
448 | ||
642e522c RGS |
449 | |
450 | =item An Array Reference | |
451 | ||
1a6a8453 PM |
452 | If C<$output> is an array reference, the uncompressed data will be |
453 | pushed onto the array. | |
642e522c RGS |
454 | |
455 | =item An Output FileGlob | |
456 | ||
457 | If C<$output> is a string that is delimited by the characters "<" and ">" | |
458 | C<gunzip> will assume that it is an I<output fileglob string>. The | |
459 | output is the list of files that match the fileglob. | |
460 | ||
461 | When C<$output> is an fileglob string, C<$input> must also be a fileglob | |
462 | string. Anything else is an error. | |
463 | ||
464 | =back | |
465 | ||
466 | If the C<$output> parameter is any other type, C<undef> will be returned. | |
467 | ||
642e522c | 468 | |
642e522c RGS |
469 | |
470 | =head2 Notes | |
471 | ||
c70c1701 PM |
472 | |
473 | When C<$input> maps to multiple compressed files/buffers and C<$output> is | |
474 | a single file/buffer, after uncompression C<$output> will contain a | |
475 | concatenation of all the uncompressed data from each of the input | |
476 | files/buffers. | |
477 | ||
478 | ||
642e522c RGS |
479 | |
480 | ||
481 | ||
482 | =head2 Optional Parameters | |
483 | ||
484 | Unless specified below, the optional parameters for C<gunzip>, | |
485 | C<OPTS>, are the same as those used with the OO interface defined in the | |
486 | L</"Constructor Options"> section below. | |
487 | ||
488 | =over 5 | |
489 | ||
e7d45986 | 490 | =item C<< AutoClose => 0|1 >> |
642e522c | 491 | |
1a6a8453 PM |
492 | This option applies to any input or output data streams to |
493 | C<gunzip> that are filehandles. | |
642e522c RGS |
494 | |
495 | If C<AutoClose> is specified, and the value is true, it will result in all | |
496 | input and/or output filehandles being closed once C<gunzip> has | |
497 | completed. | |
498 | ||
499 | This parameter defaults to 0. | |
500 | ||
501 | ||
e7d45986 | 502 | =item C<< BinModeOut => 0|1 >> |
1a6a8453 PM |
503 | |
504 | When writing to a file or filehandle, set C<binmode> before writing to the | |
505 | file. | |
506 | ||
507 | Defaults to 0. | |
508 | ||
509 | ||
510 | ||
511 | ||
512 | ||
e7d45986 | 513 | =item C<< Append => 0|1 >> |
642e522c RGS |
514 | |
515 | TODO | |
516 | ||
e7d45986 | 517 | =item C<< MultiStream => 0|1 >> |
1a6a8453 | 518 | |
258133d1 | 519 | |
e7d45986 PM |
520 | If the input file/buffer contains multiple compressed data streams, this |
521 | option will uncompress the whole lot as a single data stream. | |
1a6a8453 | 522 | |
e7d45986 | 523 | Defaults to 0. |
1a6a8453 | 524 | |
642e522c RGS |
525 | |
526 | ||
258133d1 PM |
527 | |
528 | ||
529 | =item C<< TrailingData => $scalar >> | |
530 | ||
531 | Returns the data, if any, that is present immediately after the compressed | |
532 | data stream once uncompression is complete. | |
533 | ||
534 | This option can be used when there is useful information immediately | |
535 | following the compressed data stream, and you don't know the length of the | |
536 | compressed data stream. | |
537 | ||
538 | If the input is a buffer, C<trailingData> will return everything from the | |
539 | end of the compressed data stream to the end of the buffer. | |
540 | ||
541 | If the input is a filehandle, C<trailingData> will return the data that is | |
542 | left in the filehandle input buffer once the end of the compressed data | |
543 | stream has been reached. You can then use the filehandle to read the rest | |
544 | of the input file. | |
545 | ||
546 | Don't bother using C<trailingData> if the input is a filename. | |
547 | ||
548 | ||
549 | ||
550 | If you know the length of the compressed data stream before you start | |
551 | uncompressing, you can avoid having to use C<trailingData> by setting the | |
552 | C<InputLength> option. | |
553 | ||
554 | ||
555 | ||
642e522c RGS |
556 | =back |
557 | ||
558 | ||
559 | ||
560 | ||
561 | =head2 Examples | |
562 | ||
563 | To read the contents of the file C<file1.txt.gz> and write the | |
564 | compressed data to the file C<file1.txt>. | |
565 | ||
566 | use strict ; | |
567 | use warnings ; | |
568 | use IO::Uncompress::Gunzip qw(gunzip $GunzipError) ; | |
569 | ||
570 | my $input = "file1.txt.gz"; | |
571 | my $output = "file1.txt"; | |
572 | gunzip $input => $output | |
573 | or die "gunzip failed: $GunzipError\n"; | |
574 | ||
575 | ||
576 | To read from an existing Perl filehandle, C<$input>, and write the | |
577 | uncompressed data to a buffer, C<$buffer>. | |
578 | ||
579 | use strict ; | |
580 | use warnings ; | |
581 | use IO::Uncompress::Gunzip qw(gunzip $GunzipError) ; | |
582 | use IO::File ; | |
583 | ||
584 | my $input = new IO::File "<file1.txt.gz" | |
585 | or die "Cannot open 'file1.txt.gz': $!\n" ; | |
586 | my $buffer ; | |
587 | gunzip $input => \$buffer | |
588 | or die "gunzip failed: $GunzipError\n"; | |
589 | ||
590 | To uncompress all files in the directory "/my/home" that match "*.txt.gz" and store the compressed data in the same directory | |
591 | ||
592 | use strict ; | |
593 | use warnings ; | |
594 | use IO::Uncompress::Gunzip qw(gunzip $GunzipError) ; | |
595 | ||
596 | gunzip '</my/home/*.txt.gz>' => '</my/home/#1.txt>' | |
597 | or die "gunzip failed: $GunzipError\n"; | |
598 | ||
599 | and if you want to compress each file one at a time, this will do the trick | |
600 | ||
601 | use strict ; | |
602 | use warnings ; | |
603 | use IO::Uncompress::Gunzip qw(gunzip $GunzipError) ; | |
604 | ||
605 | for my $input ( glob "/my/home/*.txt.gz" ) | |
606 | { | |
607 | my $output = $input; | |
608 | $output =~ s/.gz// ; | |
609 | gunzip $input => $output | |
610 | or die "Error compressing '$input': $GunzipError\n"; | |
611 | } | |
612 | ||
613 | =head1 OO Interface | |
614 | ||
615 | =head2 Constructor | |
616 | ||
617 | The format of the constructor for IO::Uncompress::Gunzip is shown below | |
618 | ||
619 | ||
620 | my $z = new IO::Uncompress::Gunzip $input [OPTS] | |
621 | or die "IO::Uncompress::Gunzip failed: $GunzipError\n"; | |
622 | ||
623 | Returns an C<IO::Uncompress::Gunzip> object on success and undef on failure. | |
624 | The variable C<$GunzipError> will contain an error message on failure. | |
625 | ||
1a6a8453 PM |
626 | If you are running Perl 5.005 or better the object, C<$z>, returned from |
627 | IO::Uncompress::Gunzip can be used exactly like an L<IO::File|IO::File> filehandle. | |
628 | This means that all normal input file operations can be carried out with | |
629 | C<$z>. For example, to read a line from a compressed file/buffer you can | |
630 | use either of these forms | |
642e522c RGS |
631 | |
632 | $line = $z->getline(); | |
633 | $line = <$z>; | |
634 | ||
635 | The mandatory parameter C<$input> is used to determine the source of the | |
636 | compressed data. This parameter can take one of three forms. | |
637 | ||
638 | =over 5 | |
639 | ||
640 | =item A filename | |
641 | ||
642 | If the C<$input> parameter is a scalar, it is assumed to be a filename. This | |
643 | file will be opened for reading and the compressed data will be read from it. | |
644 | ||
645 | =item A filehandle | |
646 | ||
647 | If the C<$input> parameter is a filehandle, the compressed data will be | |
648 | read from it. | |
649 | The string '-' can be used as an alias for standard input. | |
650 | ||
651 | ||
652 | =item A scalar reference | |
653 | ||
654 | If C<$input> is a scalar reference, the compressed data will be read from | |
655 | C<$$output>. | |
656 | ||
657 | =back | |
658 | ||
659 | =head2 Constructor Options | |
660 | ||
661 | ||
662 | The option names defined below are case insensitive and can be optionally | |
663 | prefixed by a '-'. So all of the following are valid | |
664 | ||
665 | -AutoClose | |
666 | -autoclose | |
667 | AUTOCLOSE | |
668 | autoclose | |
669 | ||
670 | OPTS is a combination of the following options: | |
671 | ||
672 | =over 5 | |
673 | ||
e7d45986 | 674 | =item C<< AutoClose => 0|1 >> |
642e522c RGS |
675 | |
676 | This option is only valid when the C<$input> parameter is a filehandle. If | |
677 | specified, and the value is true, it will result in the file being closed once | |
678 | either the C<close> method is called or the IO::Uncompress::Gunzip object is | |
679 | destroyed. | |
680 | ||
681 | This parameter defaults to 0. | |
682 | ||
e7d45986 | 683 | =item C<< MultiStream => 0|1 >> |
642e522c RGS |
684 | |
685 | ||
686 | ||
687 | Allows multiple concatenated compressed streams to be treated as a single | |
688 | compressed stream. Decompression will stop once either the end of the | |
689 | file/buffer is reached, an error is encountered (premature eof, corrupt | |
690 | compressed data) or the end of a stream is not immediately followed by the | |
691 | start of another stream. | |
692 | ||
693 | This parameter defaults to 0. | |
694 | ||
695 | ||
e7d45986 | 696 | =item C<< Prime => $string >> |
642e522c RGS |
697 | |
698 | This option will uncompress the contents of C<$string> before processing the | |
699 | input file/buffer. | |
700 | ||
701 | This option can be useful when the compressed data is embedded in another | |
702 | file/data structure and it is not possible to work out where the compressed | |
1a6a8453 PM |
703 | data begins without having to read the first few bytes. If this is the |
704 | case, the uncompression can be I<primed> with these bytes using this | |
705 | option. | |
642e522c | 706 | |
e7d45986 | 707 | =item C<< Transparent => 0|1 >> |
642e522c | 708 | |
f6fd7794 | 709 | If this option is set and the input file/buffer is not compressed data, |
642e522c RGS |
710 | the module will allow reading of it anyway. |
711 | ||
f6fd7794 PM |
712 | In addition, if the input file/buffer does contain compressed data and |
713 | there is non-compressed data immediately following it, setting this option | |
714 | will make this module treat the whole file/bufffer as a single data stream. | |
715 | ||
642e522c RGS |
716 | This option defaults to 1. |
717 | ||
e7d45986 | 718 | =item C<< BlockSize => $num >> |
642e522c | 719 | |
1a6a8453 PM |
720 | When reading the compressed input data, IO::Uncompress::Gunzip will read it in |
721 | blocks of C<$num> bytes. | |
642e522c RGS |
722 | |
723 | This option defaults to 4096. | |
724 | ||
e7d45986 | 725 | =item C<< InputLength => $size >> |
642e522c | 726 | |
1a6a8453 PM |
727 | When present this option will limit the number of compressed bytes read |
728 | from the input file/buffer to C<$size>. This option can be used in the | |
729 | situation where there is useful data directly after the compressed data | |
730 | stream and you know beforehand the exact length of the compressed data | |
731 | stream. | |
642e522c | 732 | |
1a6a8453 PM |
733 | This option is mostly used when reading from a filehandle, in which case |
734 | the file pointer will be left pointing to the first byte directly after the | |
642e522c RGS |
735 | compressed data stream. |
736 | ||
737 | ||
738 | ||
739 | This option defaults to off. | |
740 | ||
e7d45986 | 741 | =item C<< Append => 0|1 >> |
642e522c RGS |
742 | |
743 | This option controls what the C<read> method does with uncompressed data. | |
744 | ||
1a6a8453 PM |
745 | If set to 1, all uncompressed data will be appended to the output parameter |
746 | of the C<read> method. | |
642e522c | 747 | |
1a6a8453 PM |
748 | If set to 0, the contents of the output parameter of the C<read> method |
749 | will be overwritten by the uncompressed data. | |
642e522c RGS |
750 | |
751 | Defaults to 0. | |
752 | ||
e7d45986 | 753 | =item C<< Strict => 0|1 >> |
642e522c RGS |
754 | |
755 | ||
756 | ||
757 | This option controls whether the extra checks defined below are used when | |
1a6a8453 PM |
758 | carrying out the decompression. When Strict is on, the extra tests are |
759 | carried out, when Strict is off they are not. | |
642e522c RGS |
760 | |
761 | The default for this option is off. | |
762 | ||
763 | ||
764 | ||
765 | ||
766 | ||
767 | ||
768 | ||
769 | ||
770 | ||
771 | =over 5 | |
772 | ||
773 | =item 1 | |
774 | ||
775 | If the FHCRC bit is set in the gzip FLG header byte, the CRC16 bytes in the | |
776 | header must match the crc16 value of the gzip header actually read. | |
777 | ||
778 | =item 2 | |
779 | ||
780 | If the gzip header contains a name field (FNAME) it consists solely of ISO | |
781 | 8859-1 characters. | |
782 | ||
783 | =item 3 | |
784 | ||
1a6a8453 PM |
785 | If the gzip header contains a comment field (FCOMMENT) it consists solely |
786 | of ISO 8859-1 characters plus line-feed. | |
642e522c RGS |
787 | |
788 | =item 4 | |
789 | ||
790 | If the gzip FEXTRA header field is present it must conform to the sub-field | |
a02d0f6f | 791 | structure as defined in RFC 1952. |
642e522c RGS |
792 | |
793 | =item 5 | |
794 | ||
795 | The CRC32 and ISIZE trailer fields must be present. | |
796 | ||
797 | =item 6 | |
798 | ||
799 | The value of the CRC32 field read must match the crc32 value of the | |
800 | uncompressed data actually contained in the gzip file. | |
801 | ||
802 | =item 7 | |
803 | ||
1a6a8453 PM |
804 | The value of the ISIZE fields read must match the length of the |
805 | uncompressed data actually read from the file. | |
642e522c RGS |
806 | |
807 | =back | |
808 | ||
809 | ||
810 | ||
811 | ||
812 | ||
813 | ||
642e522c | 814 | |
258133d1 | 815 | =item C<< ParseExtra => 0|1 >> |
642e522c RGS |
816 | If the gzip FEXTRA header field is present and this option is set, it will |
817 | force the module to check that it conforms to the sub-field structure as | |
a02d0f6f | 818 | defined in RFC 1952. |
642e522c RGS |
819 | |
820 | If the C<Strict> is on it will automatically enable this option. | |
821 | ||
822 | Defaults to 0. | |
823 | ||
824 | ||
825 | ||
a02d0f6f | 826 | |
642e522c RGS |
827 | =back |
828 | ||
829 | =head2 Examples | |
830 | ||
831 | TODO | |
832 | ||
833 | =head1 Methods | |
834 | ||
835 | =head2 read | |
836 | ||
837 | Usage is | |
838 | ||
839 | $status = $z->read($buffer) | |
840 | ||
841 | Reads a block of compressed data (the size the the compressed block is | |
842 | determined by the C<Buffer> option in the constructor), uncompresses it and | |
1a6a8453 PM |
843 | writes any uncompressed data into C<$buffer>. If the C<Append> parameter is |
844 | set in the constructor, the uncompressed data will be appended to the | |
845 | C<$buffer> parameter. Otherwise C<$buffer> will be overwritten. | |
642e522c | 846 | |
1a6a8453 PM |
847 | Returns the number of uncompressed bytes written to C<$buffer>, zero if eof |
848 | or a negative number on error. | |
642e522c RGS |
849 | |
850 | =head2 read | |
851 | ||
852 | Usage is | |
853 | ||
854 | $status = $z->read($buffer, $length) | |
855 | $status = $z->read($buffer, $length, $offset) | |
856 | ||
857 | $status = read($z, $buffer, $length) | |
858 | $status = read($z, $buffer, $length, $offset) | |
859 | ||
860 | Attempt to read C<$length> bytes of uncompressed data into C<$buffer>. | |
861 | ||
1a6a8453 PM |
862 | The main difference between this form of the C<read> method and the |
863 | previous one, is that this one will attempt to return I<exactly> C<$length> | |
864 | bytes. The only circumstances that this function will not is if end-of-file | |
865 | or an IO error is encountered. | |
642e522c | 866 | |
1a6a8453 PM |
867 | Returns the number of uncompressed bytes written to C<$buffer>, zero if eof |
868 | or a negative number on error. | |
642e522c RGS |
869 | |
870 | ||
871 | =head2 getline | |
872 | ||
873 | Usage is | |
874 | ||
875 | $line = $z->getline() | |
876 | $line = <$z> | |
877 | ||
878 | Reads a single line. | |
879 | ||
258133d1 PM |
880 | This method fully supports the use of of the variable C<$/> (or |
881 | C<$INPUT_RECORD_SEPARATOR> or C<$RS> when C<English> is in use) to | |
882 | determine what constitutes an end of line. Paragraph mode, record mode and | |
883 | file slurp mode are all supported. | |
642e522c RGS |
884 | |
885 | ||
886 | =head2 getc | |
887 | ||
888 | Usage is | |
889 | ||
890 | $char = $z->getc() | |
891 | ||
892 | Read a single character. | |
893 | ||
894 | =head2 ungetc | |
895 | ||
896 | Usage is | |
897 | ||
898 | $char = $z->ungetc($string) | |
899 | ||
900 | ||
a02d0f6f | 901 | |
642e522c RGS |
902 | =head2 inflateSync |
903 | ||
904 | Usage is | |
905 | ||
906 | $status = $z->inflateSync() | |
907 | ||
908 | TODO | |
909 | ||
a02d0f6f | 910 | |
642e522c RGS |
911 | =head2 getHeaderInfo |
912 | ||
913 | Usage is | |
914 | ||
1a6a8453 PM |
915 | $hdr = $z->getHeaderInfo(); |
916 | @hdrs = $z->getHeaderInfo(); | |
642e522c | 917 | |
1a6a8453 PM |
918 | This method returns either a hash reference (in scalar context) or a list |
919 | or hash references (in array context) that contains information about each | |
920 | of the header fields in the compressed data stream(s). | |
642e522c RGS |
921 | |
922 | ||
923 | ||
1a6a8453 | 924 | =over 5 |
642e522c | 925 | |
1a6a8453 | 926 | =item Name |
642e522c | 927 | |
1a6a8453 PM |
928 | The contents of the Name header field, if present. If no name is |
929 | present, the value will be undef. Note this is different from a zero length | |
930 | name, which will return an empty string. | |
642e522c RGS |
931 | |
932 | =item Comment | |
933 | ||
1a6a8453 PM |
934 | The contents of the Comment header field, if present. If no comment is |
935 | present, the value will be undef. Note this is different from a zero length | |
936 | comment, which will return an empty string. | |
642e522c RGS |
937 | |
938 | =back | |
939 | ||
940 | ||
941 | ||
942 | ||
943 | =head2 tell | |
944 | ||
945 | Usage is | |
946 | ||
947 | $z->tell() | |
948 | tell $z | |
949 | ||
950 | Returns the uncompressed file offset. | |
951 | ||
952 | =head2 eof | |
953 | ||
954 | Usage is | |
955 | ||
956 | $z->eof(); | |
957 | eof($z); | |
958 | ||
959 | ||
960 | ||
961 | Returns true if the end of the compressed input stream has been reached. | |
962 | ||
963 | ||
964 | ||
965 | =head2 seek | |
966 | ||
967 | $z->seek($position, $whence); | |
968 | seek($z, $position, $whence); | |
969 | ||
970 | ||
971 | ||
972 | ||
973 | Provides a sub-set of the C<seek> functionality, with the restriction | |
974 | that it is only legal to seek forward in the input file/buffer. | |
975 | It is a fatal error to attempt to seek backward. | |
976 | ||
977 | ||
978 | ||
979 | The C<$whence> parameter takes one the usual values, namely SEEK_SET, | |
980 | SEEK_CUR or SEEK_END. | |
981 | ||
982 | Returns 1 on success, 0 on failure. | |
983 | ||
984 | =head2 binmode | |
985 | ||
986 | Usage is | |
987 | ||
988 | $z->binmode | |
989 | binmode $z ; | |
990 | ||
991 | This is a noop provided for completeness. | |
992 | ||
a02d0f6f RGS |
993 | =head2 opened |
994 | ||
995 | $z->opened() | |
996 | ||
997 | Returns true if the object currently refers to a opened file/buffer. | |
998 | ||
999 | =head2 autoflush | |
1000 | ||
1001 | my $prev = $z->autoflush() | |
1002 | my $prev = $z->autoflush(EXPR) | |
1003 | ||
1004 | If the C<$z> object is associated with a file or a filehandle, this method | |
1005 | returns the current autoflush setting for the underlying filehandle. If | |
1006 | C<EXPR> is present, and is non-zero, it will enable flushing after every | |
1007 | write/print operation. | |
1008 | ||
1009 | If C<$z> is associated with a buffer, this method has no effect and always | |
1010 | returns C<undef>. | |
1011 | ||
1012 | B<Note> that the special variable C<$|> B<cannot> be used to set or | |
1013 | retrieve the autoflush setting. | |
1014 | ||
1015 | =head2 input_line_number | |
1016 | ||
1017 | $z->input_line_number() | |
1018 | $z->input_line_number(EXPR) | |
1019 | ||
1020 | ||
1021 | ||
1022 | Returns the current uncompressed line number. If C<EXPR> is present it has | |
1023 | the effect of setting the line number. Note that setting the line number | |
1024 | does not change the current position within the file/buffer being read. | |
1025 | ||
1026 | The contents of C<$/> are used to to determine what constitutes a line | |
1027 | terminator. | |
1028 | ||
1029 | ||
1030 | ||
642e522c RGS |
1031 | =head2 fileno |
1032 | ||
1033 | $z->fileno() | |
1034 | fileno($z) | |
1035 | ||
a02d0f6f RGS |
1036 | If the C<$z> object is associated with a file or a filehandle, this method |
1037 | will return the underlying file descriptor. | |
642e522c RGS |
1038 | |
1039 | If the C<$z> object is is associated with a buffer, this method will | |
1040 | return undef. | |
1041 | ||
1042 | =head2 close | |
1043 | ||
1044 | $z->close() ; | |
1045 | close $z ; | |
1046 | ||
1047 | ||
1048 | ||
1049 | Closes the output file/buffer. | |
1050 | ||
1051 | ||
1052 | ||
1053 | For most versions of Perl this method will be automatically invoked if | |
1054 | the IO::Uncompress::Gunzip object is destroyed (either explicitly or by the | |
1055 | variable with the reference to the object going out of scope). The | |
1056 | exceptions are Perl versions 5.005 through 5.00504 and 5.8.0. In | |
1057 | these cases, the C<close> method will be called automatically, but | |
1058 | not until global destruction of all live objects when the program is | |
1059 | terminating. | |
1060 | ||
1061 | Therefore, if you want your scripts to be able to run on all versions | |
1062 | of Perl, you should call C<close> explicitly and not rely on automatic | |
1063 | closing. | |
1064 | ||
1065 | Returns true on success, otherwise 0. | |
1066 | ||
1067 | If the C<AutoClose> option has been enabled when the IO::Uncompress::Gunzip | |
1068 | object was created, and the object is associated with a file, the | |
1069 | underlying file will also be closed. | |
1070 | ||
1071 | ||
1072 | ||
1073 | ||
e7d45986 PM |
1074 | =head2 nextStream |
1075 | ||
1076 | Usage is | |
1077 | ||
1078 | my $status = $z->nextStream(); | |
1079 | ||
1080 | Skips to the next compressed data stream in the input file/buffer. If a new | |
258133d1 PM |
1081 | compressed data stream is found, the eof marker will be cleared and C<$.> |
1082 | will be reset to 0. | |
e7d45986 PM |
1083 | |
1084 | Returns 1 if a new stream was found, 0 if none was found, and -1 if an | |
1085 | error was encountered. | |
1086 | ||
1087 | =head2 trailingData | |
1088 | ||
1089 | Usage is | |
1090 | ||
1091 | my $data = $z->trailingData(); | |
1092 | ||
258133d1 PM |
1093 | Returns the data, if any, that is present immediately after the compressed |
1094 | data stream once uncompression is complete. It only makes sense to call | |
1095 | this method once the end of the compressed data stream has been | |
1096 | encountered. | |
1097 | ||
1098 | This option can be used when there is useful information immediately | |
1099 | following the compressed data stream, and you don't know the length of the | |
1100 | compressed data stream. | |
1101 | ||
1102 | If the input is a buffer, C<trailingData> will return everything from the | |
1103 | end of the compressed data stream to the end of the buffer. | |
1104 | ||
1105 | If the input is a filehandle, C<trailingData> will return the data that is | |
1106 | left in the filehandle input buffer once the end of the compressed data | |
1107 | stream has been reached. You can then use the filehandle to read the rest | |
1108 | of the input file. | |
1109 | ||
1110 | Don't bother using C<trailingData> if the input is a filename. | |
1111 | ||
1112 | ||
1113 | ||
1114 | If you know the length of the compressed data stream before you start | |
1115 | uncompressing, you can avoid having to use C<trailingData> by setting the | |
1116 | C<InputLength> option in the constructor. | |
e7d45986 | 1117 | |
642e522c RGS |
1118 | =head1 Importing |
1119 | ||
1120 | No symbolic constants are required by this IO::Uncompress::Gunzip at present. | |
1121 | ||
1122 | =over 5 | |
1123 | ||
1124 | =item :all | |
1125 | ||
1126 | Imports C<gunzip> and C<$GunzipError>. | |
1127 | Same as doing this | |
1128 | ||
1129 | use IO::Uncompress::Gunzip qw(gunzip $GunzipError) ; | |
1130 | ||
1131 | =back | |
1132 | ||
1133 | =head1 EXAMPLES | |
1134 | ||
1135 | ||
1136 | ||
1137 | ||
1138 | =head1 SEE ALSO | |
1139 | ||
258133d1 | 1140 | L<Compress::Zlib>, L<IO::Compress::Gzip>, L<IO::Compress::Deflate>, L<IO::Uncompress::Inflate>, L<IO::Compress::RawDeflate>, L<IO::Uncompress::RawInflate>, L<IO::Compress::Bzip2>, L<IO::Uncompress::Bunzip2>, L<IO::Compress::Lzop>, L<IO::Uncompress::UnLzop>, L<IO::Compress::Lzf>, L<IO::Uncompress::UnLzf>, L<IO::Uncompress::AnyInflate>, L<IO::Uncompress::AnyUncompress> |
642e522c RGS |
1141 | |
1142 | L<Compress::Zlib::FAQ|Compress::Zlib::FAQ> | |
1143 | ||
a02d0f6f RGS |
1144 | L<File::GlobMapper|File::GlobMapper>, L<Archive::Zip|Archive::Zip>, |
1145 | L<Archive::Tar|Archive::Tar>, | |
642e522c RGS |
1146 | L<IO::Zlib|IO::Zlib> |
1147 | ||
a02d0f6f | 1148 | |
642e522c RGS |
1149 | For RFC 1950, 1951 and 1952 see |
1150 | F<http://www.faqs.org/rfcs/rfc1950.html>, | |
1151 | F<http://www.faqs.org/rfcs/rfc1951.html> and | |
1152 | F<http://www.faqs.org/rfcs/rfc1952.html> | |
1153 | ||
a02d0f6f RGS |
1154 | The I<zlib> compression library was written by Jean-loup Gailly |
1155 | F<gzip@prep.ai.mit.edu> and Mark Adler F<madler@alumni.caltech.edu>. | |
1156 | ||
1157 | The primary site for the I<zlib> compression library is | |
1158 | F<http://www.zlib.org>. | |
1159 | ||
1160 | The primary site for gzip is F<http://www.gzip.org>. | |
1161 | ||
1162 | ||
1163 | ||
1164 | ||
642e522c RGS |
1165 | =head1 AUTHOR |
1166 | ||
cb7abd7f | 1167 | This module was written by Paul Marquess, F<pmqs@cpan.org>. |
642e522c | 1168 | |
642e522c | 1169 | |
642e522c RGS |
1170 | |
1171 | =head1 MODIFICATION HISTORY | |
1172 | ||
1173 | See the Changes file. | |
1174 | ||
1175 | =head1 COPYRIGHT AND LICENSE | |
642e522c | 1176 | |
b0cda13f | 1177 | Copyright (c) 2005-2007 Paul Marquess. All rights reserved. |
a02d0f6f | 1178 | |
642e522c RGS |
1179 | This program is free software; you can redistribute it and/or |
1180 | modify it under the same terms as Perl itself. | |
1181 |