4 @INC = ("../lib", "lib");
17 # use Test::NoWarnings, if available
20 if eval { require Test::NoWarnings ; import Test::NoWarnings; 1 };
23 plan tests => 920 + $extra ;
25 use_ok('Compress::Zlib', 2) ;
26 use_ok('Compress::Gzip::Constants') ;
28 use_ok('IO::Compress::Gzip', qw($GzipError)) ;
29 use_ok('IO::Uncompress::Gunzip', qw($GunzipError)) ;
35 # Check the Gzip Header Parameters
36 #========================================
38 my $ThisOS_code = $Compress::Zlib::gzip_os_code;
40 my $lex = new LexFile my $name ;
43 title "Check Defaults";
44 # Check Name defaults undef, no name, no comment
45 # and Time can be explicitly set.
47 my $hdr = readHeaderInfo($name, -Time => 1234);
49 is $hdr->{Time}, 1234;
50 ok ! defined $hdr->{Name};
51 is $hdr->{MethodName}, 'Deflated';
52 is $hdr->{ExtraFlags}, 0;
53 is $hdr->{MethodID}, Z_DEFLATED;
54 is $hdr->{OsID}, $ThisOS_code ;
55 ok ! defined $hdr->{Comment} ;
56 ok ! defined $hdr->{ExtraFieldRaw} ;
57 ok ! defined $hdr->{HeaderCRC} ;
58 ok ! $hdr->{isMinimalHeader} ;
63 title "Check name can be different from filename" ;
64 # Check Name can be different from filename
65 # Comment and Extra can be set
66 # Can specify a zero Time
68 my $comment = "This is a Comment" ;
69 my $extra = "A little something extra" ;
70 my $aname = "a new name" ;
71 my $hdr = readHeaderInfo $name,
75 -ExtraField => $extra,
79 ok $hdr->{Name} eq $aname;
80 ok $hdr->{MethodName} eq 'Deflated';
81 ok $hdr->{MethodID} == 8;
82 is $hdr->{ExtraFlags}, 0;
83 ok $hdr->{Comment} eq $comment ;
84 is $hdr->{OsID}, $ThisOS_code ;
85 ok ! $hdr->{isMinimalHeader} ;
86 ok ! defined $hdr->{HeaderCRC} ;
90 title "Check Time defaults to now" ;
92 # Check Time defaults to now
93 # and that can have empty name, comment and extrafield
95 my $hdr = readHeaderInfo $name,
102 ok $hdr->{Time} >= $before ;
103 ok $hdr->{Time} <= $after ;
105 ok defined $hdr->{Name} ;
106 ok $hdr->{Name} eq "";
107 ok defined $hdr->{Comment} ;
108 ok $hdr->{Comment} eq "";
109 ok defined $hdr->{ExtraFieldRaw} ;
110 ok $hdr->{ExtraFieldRaw} eq "";
111 is $hdr->{ExtraFlags}, 0;
113 ok ! $hdr->{isMinimalHeader} ;
114 ok $hdr->{TextFlag} ;
115 ok ! defined $hdr->{HeaderCRC} ;
116 is $hdr->{OsID}, $ThisOS_code ;
121 title "can have null extrafield" ;
124 my $hdr = readHeaderInfo $name,
128 -ExtraField => "\x00";
131 ok $hdr->{Time} >= $before ;
132 ok $hdr->{Time} <= $after ;
133 ok $hdr->{Name} eq "a";
134 ok $hdr->{Comment} eq "b";
135 is $hdr->{ExtraFlags}, 0;
136 ok $hdr->{ExtraFieldRaw} eq "\x00";
137 ok ! $hdr->{isMinimalHeader} ;
138 ok ! $hdr->{TextFlag} ;
139 ok ! defined $hdr->{HeaderCRC} ;
140 is $hdr->{OsID}, $ThisOS_code ;
145 title "can have undef name, comment, time and extrafield" ;
147 my $hdr = readHeaderInfo $name,
150 -ExtraField => undef,
153 ok $hdr->{Time} == 0;
154 ok ! defined $hdr->{Name} ;
155 ok ! defined $hdr->{Comment} ;
156 ok ! defined $hdr->{ExtraFieldRaw} ;
157 ok ! $hdr->{isMinimalHeader} ;
158 ok ! $hdr->{TextFlag} ;
159 ok ! defined $hdr->{HeaderCRC} ;
160 is $hdr->{OsID}, $ThisOS_code ;
164 for my $value ( "0D", "0A", "0A0D", "0D0A", "0A0A", "0D0D")
166 title "Comment with $value" ;
168 my $v = pack "H*", $value;
169 my $comment = "my${v}comment$v";
170 my $hdr = readHeaderInfo $name,
174 -Comment => $comment,
180 ok defined $hdr->{Name} ;
181 ok $hdr->{Name} eq "";
182 ok defined $hdr->{Comment} ;
183 is $hdr->{Comment}, $comment;
184 ok defined $hdr->{ExtraFieldRaw} ;
185 ok $hdr->{ExtraFieldRaw} eq "";
186 is $hdr->{ExtraFlags}, 0;
188 ok ! $hdr->{isMinimalHeader} ;
189 ok $hdr->{TextFlag} ;
190 ok ! defined $hdr->{HeaderCRC} ;
191 is $hdr->{OsID}, $ThisOS_code ;
196 title "Check crchdr" ;
198 my $hdr = readHeaderInfo $name, -HeaderCRC => 1;
200 ok ! defined $hdr->{Name};
201 is $hdr->{ExtraFlags}, 0;
202 ok ! defined $hdr->{ExtraFieldRaw} ;
203 ok ! defined $hdr->{Comment} ;
204 ok ! $hdr->{isMinimalHeader} ;
205 ok ! $hdr->{TextFlag} ;
206 ok defined $hdr->{HeaderCRC} ;
207 is $hdr->{OsID}, $ThisOS_code ;
211 title "Check ExtraFlags" ;
213 my $hdr = readHeaderInfo $name, -Level => Z_BEST_SPEED;
215 ok ! defined $hdr->{Name};
216 is $hdr->{ExtraFlags}, 2;
217 ok ! defined $hdr->{ExtraFieldRaw} ;
218 ok ! defined $hdr->{Comment} ;
219 ok ! $hdr->{isMinimalHeader} ;
220 ok ! $hdr->{TextFlag} ;
221 ok ! defined $hdr->{HeaderCRC} ;
223 $hdr = readHeaderInfo $name, -Level => Z_BEST_COMPRESSION;
225 ok ! defined $hdr->{Name};
226 is $hdr->{ExtraFlags}, 4;
227 ok ! defined $hdr->{ExtraFieldRaw} ;
228 ok ! defined $hdr->{Comment} ;
229 ok ! $hdr->{isMinimalHeader} ;
230 ok ! $hdr->{TextFlag} ;
231 ok ! defined $hdr->{HeaderCRC} ;
233 $hdr = readHeaderInfo $name, -Level => Z_BEST_COMPRESSION,
236 ok ! defined $hdr->{Name};
237 is $hdr->{ExtraFlags}, 42;
238 ok ! defined $hdr->{ExtraFieldRaw} ;
239 ok ! defined $hdr->{Comment} ;
240 ok ! $hdr->{isMinimalHeader} ;
241 ok ! $hdr->{TextFlag} ;
242 ok ! defined $hdr->{HeaderCRC} ;
250 for my $code ( -1, undef, '', 'fred' )
252 my $code_name = defined $code ? "'$code'" : 'undef';
253 eval { new IO::Compress::Gzip $name, -OS_Code => $code } ;
254 like $@, mkErr("^IO::Compress::Gzip: Parameter 'OS_Code' must be an unsigned int, got $code_name"),
255 " Trap OS Code $code_name";
258 for my $code ( qw( 256 ) )
260 ok ! new IO::Compress::Gzip($name, OS_Code => $code) ;
261 like $GzipError, "/^OS_Code must be between 0 and 255, got '$code'/",
262 " Trap OS Code $code";
265 for my $code ( qw(0 1 12 254 255) )
267 my $hdr = readHeaderInfo $name, OS_Code => $code;
269 is $hdr->{OsID}, $code, " Code is $code" ;
277 title 'Check ExtraField';
280 [1, ['AB' => ''] => [['AB'=>'']] ],
281 [1, {'AB' => ''} => [['AB'=>'']] ],
282 [1, ['AB' => 'Fred'] => [['AB'=>'Fred']] ],
283 [1, {'AB' => 'Fred'} => [['AB'=>'Fred']] ],
284 [1, ['Xx' => '','AB' => 'Fred'] => [['Xx' => ''],['AB'=>'Fred']] ],
285 [1, ['Xx' => '','Xx' => 'Fred'] => [['Xx' => ''],['Xx'=>'Fred']] ],
288 'Xx' => 'Fred'] => [['Xx' => ''],['Xx'=>'Fred'],
291 ['AB' => 'Fred'] ] => [['Xx' => 'a'],['AB'=>'Fred']] ],
294 "\x01\x02" => "\x03"} => [['AB'=>'Fred'],
296 ["\x01\x02"=>"\x03"]] ],
297 [1, ['AB' => 'z' x GZIP_FEXTRA_SUBFIELD_MAX_SIZE] =>
298 [['AB'=>'z' x GZIP_FEXTRA_SUBFIELD_MAX_SIZE]] ],
301 foreach my $test (@tests) {
302 my ($order, $input, $result) = @$test ;
303 ok my $x = new IO::Compress::Gzip $name,
304 -ExtraField => $input,
306 or diag "GzipError is $GzipError" ; ;
307 my $string = "abcd" ;
308 ok $x->write($string) ;
310 is GZreadFile($name), $string ;
312 ok $x = new IO::Uncompress::Gunzip $name,
315 or diag "GunzipError is $GunzipError" ; ;
316 my $hdr = $x->getHeaderInfo();
318 ok ! defined $hdr->{Name};
319 ok ! defined $hdr->{Comment} ;
320 ok ! $hdr->{isMinimalHeader} ;
321 ok ! $hdr->{TextFlag} ;
322 ok defined $hdr->{HeaderCRC} ;
324 ok defined $hdr->{ExtraFieldRaw} ;
325 ok defined $hdr->{ExtraField} ;
327 my $extra = $hdr->{ExtraField} ;
330 eq_array $extra, $result
332 eq_set $extra, $result;
339 title 'Write Invalid ExtraField';
341 my $prefix = 'Error with ExtraField Parameter: ';
343 [ sub{ "abc" } => "Not a scalar, array ref or hash ref"],
344 [ [ "a" ] => "Not even number of elements"],
345 [ [ "a" => "fred" ] => 'SubField ID not two chars long'],
346 [ [ "a\x00" => "fred" ] => 'SubField ID 2nd byte is 0x00'],
347 [ [ [ {}, "abc" ]] => "SubField ID is a reference"],
348 [ [ [ "ab", \1 ]] => "SubField Data is a reference"],
349 [ [ {"a" => "fred"} ] => "Not list of lists"],
350 [ [ ['ab'=>'x'],{"a" => "fred"} ] => "Not list of lists"],
351 [ [ ["aa"] ] => "SubField must have two parts"],
352 [ [ ["aa", "b", "c"] ] => "SubField must have two parts"],
353 [ [ ["ab" => 'x' x (GZIP_FEXTRA_SUBFIELD_MAX_SIZE + 1) ] ]
354 => "SubField Data too long"],
356 [ { 'abc', 1 } => "SubField ID not two chars long"],
357 [ { \1 , "abc" } => "SubField ID not two chars long"],
358 [ { "ab", \1 } => "SubField Data is a reference"],
363 foreach my $test (@tests) {
364 my ($input, $string) = @$test ;
366 my $x = new IO::Compress::Gzip \$buffer, -ExtraField => $input;
368 like $GzipError, "/^$prefix$string/";
378 ["Sub-field truncated",
379 "Error with ExtraField Parameter: FEXTRA Body",
380 "Header Error: Truncated in FEXTRA Body Section",
381 ['a', undef, undef] ],
382 ["Length of field incorrect",
383 "Error with ExtraField Parameter: FEXTRA Body",
384 "Header Error: Truncated in FEXTRA Body Section",
385 ["ab", 255, "abc"] ],
386 ["Length of 2nd field incorrect",
387 "Error with ExtraField Parameter: FEXTRA Body",
388 "Header Error: Truncated in FEXTRA Body Section",
389 ["ab", 3, "abc"], ["de", 7, "x"] ],
390 ["Length of 2nd field incorrect",
391 "Error with ExtraField Parameter: SubField ID 2nd byte is 0x00",
392 "Header Error: Truncated in FEXTRA Body Section",
393 ["a\x00", 3, "abc"], ["de", 7, "x"] ],
396 foreach my $test (@tests)
398 my $name = shift @$test;
399 my $gzip_error = shift @$test;
400 my $gunzip_error = shift @$test;
402 title "Read Corrupt ExtraField - $name" ;
406 for my $field (@$test)
408 my ($id, $len, $data) = @$field;
410 $input .= $id if defined $id ;
411 $input .= pack("v", $len) if defined $len ;
412 $input .= $data if defined $data;
417 my $x = new IO::Compress::Gzip \$buffer, -ExtraField => $input, Strict => 1;
419 ok ! $x, " IO::Compress::Gzip fails";
420 like $GzipError, "/^$gzip_error/", " $name";
422 foreach my $check (0, 1)
424 ok $x = new IO::Compress::Gzip \$buffer, -ExtraField => $input, Strict => 0
425 or diag "GzipError is $GzipError" ; ;
426 my $string = "abcd" ;
429 is anyUncompress(\$buffer), $string ;
431 $x = new IO::Uncompress::Gunzip \$buffer, Strict => 0,
432 ParseExtra => $check;
435 like $GunzipError, "/^$gunzip_error/";
447 title 'Check Minimal';
449 ok my $x = new IO::Compress::Gzip $name, -Minimal => 1;
450 my $string = "abcd" ;
451 ok $x->write($string) ;
453 is GZreadFile($name), $string ;
455 ok $x = new IO::Uncompress::Gunzip $name ;
456 my $hdr = $x->getHeaderInfo();
458 ok $hdr->{Time} == 0;
459 is $hdr->{ExtraFlags}, 0;
460 ok ! defined $hdr->{Name} ;
461 ok ! defined $hdr->{ExtraFieldRaw} ;
462 ok ! defined $hdr->{Comment} ;
463 is $hdr->{OsName}, 'Unknown' ;
464 is $hdr->{MethodName}, "Deflated";
466 ok $hdr->{isMinimalHeader} ;
467 ok ! $hdr->{TextFlag} ;
472 # Check Minimal + no comressed data
473 # This is the smallest possible gzip file (20 bytes)
475 ok my $x = new IO::Compress::Gzip $name, -Minimal => 1;
477 ok GZreadFile($name) eq '' ;
479 ok $x = new IO::Uncompress::Gunzip $name, -Append => 1 ;
483 $status = $x->read($data)
490 my $hdr = $x->getHeaderInfo();
493 ok defined $hdr->{ISIZE} ;
496 ok defined $hdr->{CRC32} ;
500 ok ! defined $hdr->{Name} ;
501 ok ! defined $hdr->{ExtraFieldRaw} ;
502 ok ! defined $hdr->{Comment} ;
503 is $hdr->{OsName}, 'Unknown' ;
504 is $hdr->{MethodName}, "Deflated";
506 ok $hdr->{isMinimalHeader} ;
507 ok ! $hdr->{TextFlag} ;
512 # Header Corruption Tests
519 ok my $x = new IO::Compress::Gzip \$good, -HeaderCRC => 1 ;
520 ok $x->write($string) ;
524 title "Header Corruption - Fingerprint wrong 1st byte" ;
526 substr($buffer, 0, 1) = 'x' ;
528 ok ! new IO::Uncompress::Gunzip \$buffer, -Transparent => 0 ;
529 ok $GunzipError =~ /Header Error: Bad Magic/;
533 title "Header Corruption - Fingerprint wrong 2nd byte" ;
535 substr($buffer, 1, 1) = "\xFF" ;
537 ok ! new IO::Uncompress::Gunzip \$buffer, -Transparent => 0 ;
538 ok $GunzipError =~ /Header Error: Bad Magic/;
539 #print "$GunzipError\n";
543 title "Header Corruption - CM not 8";
545 substr($buffer, 2, 1) = 'x' ;
547 ok ! new IO::Uncompress::Gunzip \$buffer, -Transparent => 0 ;
548 like $GunzipError, '/Header Error: Not Deflate \(CM is \d+\)/';
552 title "Header Corruption - Use of Reserved Flags";
554 substr($buffer, 3, 1) = "\xff";
556 ok ! new IO::Uncompress::Gunzip \$buffer, -Transparent => 0 ;
557 like $GunzipError, '/Header Error: Use of Reserved Bits in FLG field./';
561 title "Header Corruption - Fail HeaderCRC";
563 substr($buffer, 10, 1) = chr((ord(substr($buffer, 10, 1)) + 1) & 0xFF);
565 ok ! new IO::Uncompress::Gunzip \$buffer, -Transparent => 0, Strict => 1
566 or print "# $GunzipError\n";
567 like $GunzipError, '/Header Error: CRC16 mismatch/'
568 #or diag "buffer length " . length($buffer);
569 or hexDump(\$good), hexDump(\$buffer);
574 title "ExtraField max raw size";
576 my $store = "x" x GZIP_FEXTRA_MAX_SIZE ;
577 my $z = new IO::Compress::Gzip(\$x, ExtraField => $store, Strict => 0) ;
578 ok $z, "Created IO::Compress::Gzip object" ;
579 my $gunz = new IO::Uncompress::Gunzip \$x, Strict => 0;
580 ok $gunz, "Created IO::Uncompress::Gunzip object" ;
581 my $hdr = $gunz->getHeaderInfo();
584 is $hdr->{ExtraFieldRaw}, $store ;
588 title "Header Corruption - ExtraField too big";
590 ok ! new IO::Compress::Gzip(\$x,
591 -ExtraField => "x" x (GZIP_FEXTRA_MAX_SIZE + 1)) ;
592 like $GzipError, '/Error with ExtraField Parameter: Too Large/';
596 title "Header Corruption - Create Name with Illegal Chars";
599 ok ! new IO::Compress::Gzip \$x,
600 -Name => "fred\x02" ;
601 like $GzipError, '/Non ISO 8859-1 Character found in Name/';
603 ok my $gz = new IO::Compress::Gzip \$x,
605 -Name => "fred\x02" ;
608 ok ! new IO::Uncompress::Gunzip \$x,
611 like $GunzipError, '/Header Error: Non ISO 8859-1 Character found in Name/';
612 ok my $gunzip = new IO::Uncompress::Gunzip \$x,
615 my $hdr = $gunzip->getHeaderInfo() ;
617 is $hdr->{Name}, "fred\x02";
622 title "Header Corruption - Null Chars in Name";
624 ok ! new IO::Compress::Gzip \$x,
626 like $GzipError, '/Null Character found in Name/';
628 ok ! new IO::Compress::Gzip \$x,
630 like $GzipError, '/Null Character found in Name/';
632 ok my $gz = new IO::Compress::Gzip \$x,
634 -Name => "abc\x00de" ;
636 ok my $gunzip = new IO::Uncompress::Gunzip \$x,
639 my $hdr = $gunzip->getHeaderInfo() ;
641 is $hdr->{Name}, "abc";
646 title "Header Corruption - Create Comment with Illegal Chars";
649 ok ! new IO::Compress::Gzip \$x,
650 -Comment => "fred\x02" ;
651 like $GzipError, '/Non ISO 8859-1 Character found in Comment/';
653 ok my $gz = new IO::Compress::Gzip \$x,
655 -Comment => "fred\x02" ;
658 ok ! new IO::Uncompress::Gunzip \$x, Strict => 1;
660 like $GunzipError, '/Header Error: Non ISO 8859-1 Character found in Comment/';
661 ok my $gunzip = new IO::Uncompress::Gunzip \$x, Strict => 0;
663 my $hdr = $gunzip->getHeaderInfo() ;
665 is $hdr->{Comment}, "fred\x02";
670 title "Header Corruption - Null Char in Comment";
672 ok ! new IO::Compress::Gzip \$x,
674 like $GzipError, '/Null Character found in Comment/';
676 ok ! new IO::Compress::Gzip \$x,
677 -Comment => "abc\x00" ;
678 like $GzipError, '/Null Character found in Comment/';
680 ok my $gz = new IO::Compress::Gzip \$x,
682 -Comment => "abc\x00de" ;
684 ok my $gunzip = new IO::Uncompress::Gunzip \$x,
687 my $hdr = $gunzip->getHeaderInfo() ;
689 is $hdr->{Comment}, "abc";
694 for my $index ( GZIP_MIN_HEADER_SIZE + 1 .. GZIP_MIN_HEADER_SIZE + GZIP_FEXTRA_HEADER_SIZE + 1)
696 title "Header Corruption - Truncated in Extra";
702 ok my $x = new IO::Compress::Gzip \$truncated, -HeaderCRC => 1, Strict => 0,
703 -ExtraField => "hello" x 10 ;
704 ok $x->write($string) ;
707 substr($truncated, $index) = '' ;
708 #my $lex = new LexFile my $name ;
709 #writeFile($name, $truncated) ;
711 #my $g = new IO::Uncompress::Gunzip $name, -Transparent => 0;
712 my $g = new IO::Uncompress::Gunzip \$truncated, -Transparent => 0;
716 like($GunzipError, '/^Header Error: Truncated in FEXTRA/');
723 for my $index ( GZIP_MIN_HEADER_SIZE .. GZIP_MIN_HEADER_SIZE + length($Name) -1)
725 title "Header Corruption - Truncated in Name";
731 ok my $x = new IO::Compress::Gzip \$truncated, -Name => $Name;
732 ok $x->write($string) ;
735 substr($truncated, $index) = '' ;
737 my $g = new IO::Uncompress::Gunzip \$truncated, -Transparent => 0;
741 like $GunzipError, '/^Header Error: Truncated in FNAME Section/';
745 my $Comment = "comment" ;
746 for my $index ( GZIP_MIN_HEADER_SIZE .. GZIP_MIN_HEADER_SIZE + length($Comment) -1)
748 title "Header Corruption - Truncated in Comment";
754 ok my $x = new IO::Compress::Gzip \$truncated, -Comment => $Comment;
755 ok $x->write($string) ;
758 substr($truncated, $index) = '' ;
759 #my $lex = new LexFile my $name ;
760 #writeFile($name, $truncated) ;
762 #my $g = new IO::Uncompress::Gunzip $name, -Transparent => 0;
763 my $g = new IO::Uncompress::Gunzip \$truncated, -Transparent => 0;
767 like $GunzipError, '/^Header Error: Truncated in FCOMMENT Section/';
771 for my $index ( GZIP_MIN_HEADER_SIZE .. GZIP_MIN_HEADER_SIZE + GZIP_FHCRC_SIZE -1)
773 title "Header Corruption - Truncated in CRC";
779 ok my $x = new IO::Compress::Gzip \$truncated, -HeaderCRC => 1;
780 ok $x->write($string) ;
783 substr($truncated, $index) = '' ;
784 my $lex = new LexFile my $name ;
785 writeFile($name, $truncated) ;
787 my $g = new IO::Uncompress::Gunzip $name, -Transparent => 0;
788 #my $g = new IO::Uncompress::Gunzip \$truncated, -Transparent => 0;
792 like $GunzipError, '/^Header Error: Truncated in FHCRC Section/';
798 # Trailer Corruption tests
806 ok my $x = new IO::Compress::Gzip \$good ;
807 ok $x->write($string) ;
811 writeFile($name, $good) ;
812 ok my $gunz = new IO::Uncompress::Gunzip $name,
815 1 while $gunz->read($uncomp) > 0 ;
817 ok $uncomp eq $string
818 or print "# got [$uncomp] wanted [$string]\n";;
820 foreach my $trim (-8 .. -1)
822 my $got = $trim + 8 ;
823 title "Trailer Corruption - Trailer truncated to $got bytes" ;
825 my $expected_trailing = substr($good, -8, 8) ;
826 substr($expected_trailing, $trim) = '';
828 substr($buffer, $trim) = '';
829 writeFile($name, $buffer) ;
831 foreach my $strict (0, 1)
833 ok my $gunz = new IO::Uncompress::Gunzip $name, -Strict => $strict ;
837 ok $gunz->read($uncomp) < 0 ;
838 like $GunzipError, "/Trailer Error: trailer truncated. Expected 8 bytes, got $got/";
842 ok $gunz->read($uncomp) > 0 ;
844 my $expected = substr($buffer, - $got);
845 is ${ $gunz->trailingData() }, $expected_trailing;
848 ok $uncomp eq $string;
855 title "Trailer Corruption - Length Wrong, CRC Correct" ;
857 my $actual_len = unpack("V", substr($buffer, -4, 4));
858 substr($buffer, -4, 4) = pack('V', $actual_len + 1);
859 writeFile($name, $buffer) ;
861 foreach my $strict (0, 1)
863 ok my $gunz = new IO::Uncompress::Gunzip $name,
868 ok $gunz->read($uncomp) < 0 ;
869 my $got_len = $actual_len + 1;
870 like $GunzipError, "/Trailer Error: ISIZE mismatch. Got $got_len, expected $actual_len/";
874 ok $gunz->read($uncomp) > 0 ;
876 #is $gunz->trailingData(), substr($buffer, - $got) ;
878 ok ! ${ $gunz->trailingData() } ;
880 ok $uncomp eq $string;
887 title "Trailer Corruption - Length Correct, CRC Wrong" ;
889 my $actual_crc = unpack("V", substr($buffer, -8, 4));
890 substr($buffer, -8, 4) = pack('V', $actual_crc+1);
891 writeFile($name, $buffer) ;
893 foreach my $strict (0, 1)
895 ok my $gunz = new IO::Uncompress::Gunzip $name,
900 ok $gunz->read($uncomp) < 0 ;
901 like $GunzipError, '/Trailer Error: CRC mismatch/';
905 ok $gunz->read($uncomp) > 0 ;
908 ok ! ${ $gunz->trailingData() } ;
910 ok $uncomp eq $string;
917 title "Trailer Corruption - Length Wrong, CRC Wrong" ;
919 my $actual_len = unpack("V", substr($buffer, -4, 4));
920 my $actual_crc = unpack("V", substr($buffer, -8, 4));
921 substr($buffer, -4, 4) = pack('V', $actual_len+1);
922 substr($buffer, -8, 4) = pack('V', $actual_crc+1);
923 writeFile($name, $buffer) ;
925 foreach my $strict (0, 1)
927 ok my $gunz = new IO::Uncompress::Gunzip $name,
932 ok $gunz->read($uncomp) < 0 ;
933 like $GunzipError, '/Trailer Error: CRC mismatch/';
937 ok $gunz->read($uncomp) > 0 ;
941 ok $uncomp eq $string;