2 package IO::Compress::Base ;
9 use IO::Compress::Base::Common 2.012 ;
12 use Scalar::Util qw(blessed readonly);
21 @ISA = qw(Exporter IO::File);
25 #Can't locate object method "SWASHNEW" via package "utf8" (perhaps you forgot to load "utf8"?) at .../ext/Compress-Zlib/Gzip/blib/lib/Compress/Zlib/Common.pm line 16.
30 ${ *$self->{ErrorNo} } = shift() + 0 ;
31 ${ *$self->{Error} } = '' ;
33 return ${ *$self->{ErrorNo} } ;
41 ${ *$self->{Error} } = shift ;
42 ${ *$self->{ErrorNo} } = shift() + 0 if @_ ;
50 $self->saveErrorString(0, $_[0]);
59 my $errno = *$self->{ErrorNo};
60 my $error = ${ *$self->{Error} };
64 *$self->{ErrorNo} = $errno ;
65 ${ *$self->{Error} } = $error ;
75 return ${ *$self->{Error} } ;
81 return ${ *$self->{ErrorNo} } ;
91 if (defined *$self->{FH}) {
92 my $here = tell(*$self->{FH});
93 return $self->saveErrorString(undef, "Cannot seek to end of output filehandle: $!", $!)
95 seek(*$self->{FH}, $offset, SEEK_SET)
96 or return $self->saveErrorString(undef, "Cannot seek to end of output filehandle: $!", $!) ;
97 defined *$self->{FH}->write($data, length $data)
98 or return $self->saveErrorString(undef, $!, $!) ;
99 seek(*$self->{FH}, $here, SEEK_SET)
100 or return $self->saveErrorString(undef, "Cannot seek to end of output filehandle: $!", $!) ;
103 substr(${ *$self->{Buffer} }, $offset, length($data)) = $data ;
116 if length $data == 0 && ! $last ;
118 if ( *$self->{FilterEnvelope} ) {
120 &{ *$self->{FilterEnvelope} }();
124 if ( defined *$self->{FH} ) {
125 defined *$self->{FH}->write( $data, length $data )
126 or return $self->saveErrorString(0, $!, $!);
129 ${ *$self->{Buffer} } .= $data ;
138 return ( 'MultiStream' => [1, 1, Parse_boolean, 1],
147 my $got = shift || IO::Compress::Base::Parameters::new();
152 'AutoClose' => [1, 1, Parse_boolean, 0],
153 #'Encode' => [1, 1, Parse_any, undef],
154 'Strict' => [0, 1, Parse_boolean, 1],
155 'Append' => [1, 1, Parse_boolean, 0],
156 'BinModeIn' => [1, 1, Parse_boolean, 0],
158 'FilterEnvelope' => [1, 1, Parse_any, undef],
160 $self->getExtraParams(),
161 *$self->{OneShot} ? $self->getOneShotParams()
164 @_) or $self->croakError("${class}: $got->{Error}") ;
174 *$obj->{Closed} = 1 ;
176 my $class = ref $obj;
177 $obj->croakError("$class: Missing Output parameter")
180 my $outValue = shift ;
186 $got = $obj->checkParams($class, undef, @_)
190 my $lax = ! $got->value('Strict') ;
192 my $outType = whatIsOutput($outValue);
194 $obj->ckOutputParam($class, $outValue)
197 if ($outType eq 'buffer') {
198 *$obj->{Buffer} = $outValue;
202 *$obj->{Buffer} = \$buff ;
205 # Merge implies Append
206 my $merge = $got->value('Merge') ;
207 my $appendOutput = $got->value('Append') || $merge ;
208 *$obj->{Append} = $appendOutput;
209 *$obj->{FilterEnvelope} = $got->value('FilterEnvelope') ;
213 # Switch off Merge mode if output file/buffer is empty/doesn't exist
214 if (($outType eq 'buffer' && length $$outValue == 0 ) ||
215 ($outType ne 'buffer' && (! -e $outValue || (-w _ && -z _))) )
219 # If output is a file, check that it is writable
220 if ($outType eq 'filename' && -e $outValue && ! -w _)
221 { return $obj->saveErrorString(undef, "Output file '$outValue' is not writable" ) }
225 if ($got->parsed('Encode')) {
226 my $want_encoding = $got->value('Encode');
227 *$obj->{Encoding} = getEncoding($obj, $class, $want_encoding);
231 or $obj->croakError("${class}: " . $obj->error());
234 $obj->saveStatus(STATUS_OK) ;
239 *$obj->{Compress} = $obj->mkComp($got)
242 *$obj->{UnCompSize} = new U64 ;
243 *$obj->{CompSize} = new U64 ;
245 if ( $outType eq 'buffer') {
246 ${ *$obj->{Buffer} } = ''
247 unless $appendOutput ;
250 if ($outType eq 'handle') {
251 *$obj->{FH} = $outValue ;
252 setBinModeOutput(*$obj->{FH}) ;
254 *$obj->{Handle} = 1 ;
257 seek(*$obj->{FH}, 0, SEEK_END)
258 or return $obj->saveErrorString(undef, "Cannot seek to end of output filehandle: $!", $!) ;
262 elsif ($outType eq 'filename') {
266 *$obj->{FH} = new IO::File "$mode $outValue"
267 or return $obj->saveErrorString(undef, "cannot open file '$outValue': $!", $!) ;
268 *$obj->{StdIO} = ($outValue eq '-');
269 setBinModeOutput(*$obj->{FH}) ;
273 *$obj->{Header} = $obj->mkHeader($got) ;
274 $obj->output( *$obj->{Header} )
279 *$obj->{Compress} = $obj->createMerge($outValue, $outType)
283 *$obj->{Closed} = 0 ;
284 *$obj->{AutoClose} = $got->value('AutoClose') ;
285 *$obj->{Output} = $outValue;
286 *$obj->{ClassName} = $class;
288 *$obj->{OneShot} = 0 ;
297 my $outType = whatIsOutput($_[0]);
299 $self->croakError("$from: output parameter not a filename, filehandle or scalar ref")
302 $self->croakError("$from: output filename is undef or null string")
303 if $outType eq 'filename' && (! defined $_[0] || $_[0] eq '') ;
305 $self->croakError("$from: output buffer is read-only")
306 if $outType eq 'buffer' && readonly(${ $_[0] });
316 my $class= (caller)[0] ;
317 my $name = (caller(1))[3] ;
319 $obj->croakError("$name: expected at least 1 parameters\n")
326 my $x = new IO::Compress::Base::Validator($class, *$obj->{Error}, $name, $input, $output)
329 push @_, $output if $haveOut && $x->{Hash};
331 *$obj->{OneShot} = 1 ;
333 my $got = $obj->checkParams($name, undef, @_)
340 # while (my($k, $v) = each %$input)
343 # unless defined $v ;
345 # $obj->_singleTarget($x, 1, $k, $v, @_)
349 # return keys %$input ;
355 foreach my $pair (@{ $x->{Pairs} })
357 my ($from, $to) = @$pair ;
358 $obj->_singleTarget($x, 1, $from, $to, @_)
362 return scalar @{ $x->{Pairs} } ;
365 if (! $x->{oneOutput} )
367 my $inFile = ($x->{inType} eq 'filenames'
368 || $x->{inType} eq 'filename');
370 $x->{inType} = $inFile ? 'filename' : 'buffer';
372 foreach my $in ($x->{oneInput} ? $input : @$input)
377 $obj->_singleTarget($x, $inFile, $in, \$out, @_)
380 push @$output, \$out ;
381 #if ($x->{outType} eq 'array')
382 # { push @$output, \$out }
384 # { $output->{$in} = \$out }
390 # finally the 1 to 1 and n to 1
391 return $obj->_singleTarget($x, 1, $input, $output, @_);
393 croak "should not be here" ;
400 my $inputIsFilename = shift;
405 $obj->getFileInfo($x->{Got}, $input)
406 if isaFilename($input) and $inputIsFilename ;
408 my $z = $obj->_create($x->{Got}, @_)
412 defined $z->_wr2($input, $inputIsFilename)
413 or return $z->closeError(undef) ;
420 my $inputIsFilename = ($x->{inType} ne 'array');
421 my $keep = $x->{Got}->clone();
423 #for my $element ( ($x->{inType} eq 'hash') ? keys %$input : @$input)
424 for my $element ( @$input)
426 my $isFilename = isaFilename($element);
428 if ( $afterFirst ++ )
430 defined addInterStream($obj, $element, $isFilename)
431 or return $obj->closeError(undef) ;
435 $obj->getFileInfo($x->{Got}, $element)
438 $obj->_create($x->{Got}, @_)
442 defined $obj->_wr2($element, $isFilename)
443 or return $obj->closeError(undef) ;
445 *$obj->{Got} = $keep->clone();
447 return $obj->close() ;
457 my $inputIsFilename = shift;
459 my $input = $source ;
460 if (! $inputIsFilename)
466 if ( ref $input && ref $input eq 'SCALAR' )
468 return $self->syswrite($input, @_) ;
471 if ( ! ref $input || isaFilehandle($input))
473 my $isFilehandle = isaFilehandle($input) ;
477 if ( ! $isFilehandle )
479 $fh = new IO::File "<$input"
480 or return $self->saveErrorString(undef, "cannot open file '$input': $!", $!) ;
482 binmode $fh if *$self->{Got}->valueOrDefault('BinModeIn') ;
487 while (($status = read($fh, $buff, 16 * 1024)) > 0) {
488 $count += length $buff;
489 defined $self->syswrite($buff, @_)
493 return $self->saveErrorString(undef, $!, $!)
496 if ( (!$isFilehandle || *$self->{AutoClose}) && $input ne '-')
505 croak "Should not be here";
513 my $inputIsFilename = shift ;
515 if (*$self->{Got}->value('MultiStream'))
517 $self->getFileInfo(*$self->{Got}, $input)
518 #if isaFilename($input) and $inputIsFilename ;
519 if isaFilename($input) ;
521 # TODO -- newStream needs to allow gzip/zip header to be modified
522 return $self->newStream();
524 elsif (*$self->{Got}->value('AutoFlush'))
526 #return $self->flush(Z_FULL_FLUSH);
538 return $_[0] if ref($_[0]);
550 local ($., $@, $!, $^E, $?);
554 # TODO - memory leak with 5.8.0 - this isn't called until
563 sub filterUncompressed
573 $self->croakError( *$self->{ClassName} . "::write: not a scalar reference" )
574 unless ref $_[0] eq 'SCALAR' ;
581 $] >= 5.008 and ( utf8::downgrade($$buffer, 1)
582 or croak "Wide character in " . *$self->{ClassName} . "::write:");
586 my $slen = defined $$buffer ? length($$buffer) : 0;
589 $len = $_[1] if $_[1] < $len;
592 $offset = $_[2] || 0;
593 $self->croakError(*$self->{ClassName} . "::write: offset outside string")
597 $self->croakError( *$self->{ClassName} . "::write: offset outside string") if $offset < 0;
599 my $rem = $slen - $offset;
600 $len = $rem if $rem < $len;
603 $buffer = \substr($$buffer, $offset, $len) ;
606 return 0 if ! defined $$buffer || length $$buffer == 0 ;
608 if (*$self->{Encoding}) {
609 $$buffer = *$self->{Encoding}->encode($$buffer);
612 $self->filterUncompressed($buffer);
614 my $buffer_length = defined $$buffer ? length($$buffer) : 0 ;
615 *$self->{UnCompSize}->add($buffer_length) ;
618 my $status = *$self->{Compress}->compr($buffer, $outBuffer) ;
620 return $self->saveErrorString(undef, *$self->{Compress}{Error},
621 *$self->{Compress}{ErrorNo})
622 if $status == STATUS_ERROR;
624 *$self->{CompSize}->add(length $outBuffer) ;
626 $self->output($outBuffer)
629 return $buffer_length;
637 # $self = *$self{GLOB} ;
642 defined $self->syswrite(join($,, @_) . $\);
644 defined $self->syswrite(join("", @_) . $\);
648 defined $self->syswrite(join($,, @_));
650 defined $self->syswrite(join("", @_));
659 defined $self->syswrite(sprintf($fmt, @_));
669 my $status = *$self->{Compress}->flush($outBuffer, @_) ;
670 return $self->saveErrorString(0, *$self->{Compress}{Error},
671 *$self->{Compress}{ErrorNo})
672 if $status == STATUS_ERROR;
674 if ( defined *$self->{FH} ) {
675 *$self->{FH}->clearerr();
678 *$self->{CompSize}->add(length $outBuffer) ;
680 $self->output($outBuffer)
683 if ( defined *$self->{FH} ) {
684 defined *$self->{FH}->flush()
685 or return $self->saveErrorString(0, $!, $!);
695 $self->_writeTrailer()
698 my $got = $self->checkParams('newStream', *$self->{Got}, @_)
701 $self->ckParams($got)
702 or $self->croakError("newStream: $self->{Error}");
704 *$self->{Compress} = $self->mkComp($got)
707 *$self->{Header} = $self->mkHeader($got) ;
708 $self->output(*$self->{Header} )
711 *$self->{UnCompSize}->reset();
712 *$self->{CompSize}->reset();
720 return *$self->{Compress}->reset() ;
729 my $status = *$self->{Compress}->close($trailer) ;
730 return $self->saveErrorString(0, *$self->{Compress}{Error}, *$self->{Compress}{ErrorNo})
731 if $status == STATUS_ERROR;
733 *$self->{CompSize}->add(length $trailer) ;
735 $trailer .= $self->mkTrailer();
739 return $self->output($trailer);
742 sub _writeFinalTrailer
746 return $self->output($self->mkFinalTrailer());
753 return 1 if *$self->{Closed} || ! *$self->{Compress} ;
754 *$self->{Closed} = 1 ;
759 $self->_writeTrailer()
762 $self->_writeFinalTrailer()
765 $self->output( "", 1 )
768 if (defined *$self->{FH}) {
770 #if (! *$self->{Handle} || *$self->{AutoClose}) {
771 if ((! *$self->{Handle} || *$self->{AutoClose}) && ! *$self->{StdIO}) {
773 *$self->{FH}->close()
774 or return $self->saveErrorString(0, $!, $!);
776 delete *$self->{FH} ;
777 # This delete can set $! in older Perls, so reset the errno
792 # return *$self->{Compress}->crc32() ;
798 # return *$self->{Compress}->msg() ;
804 # return *$self->{Compress}->dict_adler() ;
810 # return *$self->{Compress}->get_Level() ;
816 # return *$self->{Compress}->get_Strategy() ;
824 return *$self->{UnCompSize}->get32bit() ;
831 return *$self->{Closed} ;
838 my $position = shift;
841 my $here = $self->tell() ;
844 #use IO::Handle qw(SEEK_SET SEEK_CUR SEEK_END);
847 if ($whence == IO::Handle::SEEK_SET) {
848 $target = $position ;
850 elsif ($whence == IO::Handle::SEEK_CUR || $whence == IO::Handle::SEEK_END) {
851 $target = $here + $position ;
854 $self->croakError(*$self->{ClassName} . "::seek: unknown value, $whence, for whence parameter");
857 # short circuit if seeking to current offset
858 return 1 if $target == $here ;
860 # Outlaw any attempt to seek backwards
861 $self->croakError(*$self->{ClassName} . "::seek: cannot seek backwards")
864 # Walk the file to the new offset
865 my $offset = $target - $here ;
868 defined $self->syswrite("\x00" x $offset)
878 # return defined *$self->{FH}
879 # ? binmode *$self->{FH}
886 return defined *$self->{FH}
887 ? *$self->{FH}->fileno()
894 return ! *$self->{Closed} ;
900 return defined *$self->{FH}
901 ? *$self->{FH}->autoflush(@_)
905 sub input_line_number
914 return sub { croak "$name Not Available: File opened only for output" ; } ;
917 *read = _notAvailable('read');
918 *READ = _notAvailable('read');
919 *readline = _notAvailable('readline');
920 *READLINE = _notAvailable('readline');
921 *getc = _notAvailable('getc');
922 *GETC = _notAvailable('getc');
933 *BINMODE = \&binmode;
935 #*sysread = \&_notAvailable;
936 #*syswrite = \&_write;
944 IO::Compress::Base - Base Class for IO::Compress modules
948 use IO::Compress::Base ;
952 This module is not intended for direct use in application code. Its sole
953 purpose if to to be sub-classed by IO::Compress modules.
957 L<Compress::Zlib>, L<IO::Compress::Gzip>, L<IO::Uncompress::Gunzip>, 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>
959 L<Compress::Zlib::FAQ|Compress::Zlib::FAQ>
961 L<File::GlobMapper|File::GlobMapper>, L<Archive::Zip|Archive::Zip>,
962 L<Archive::Tar|Archive::Tar>,
967 This module was written by Paul Marquess, F<pmqs@cpan.org>.
969 =head1 MODIFICATION HISTORY
971 See the Changes file.
973 =head1 COPYRIGHT AND LICENSE
975 Copyright (c) 2005-2008 Paul Marquess. All rights reserved.
977 This program is free software; you can redistribute it and/or
978 modify it under the same terms as Perl itself.