2 package IO::Compress::Base ;
9 use IO::Compress::Base::Common 2.006 ;
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 &{ *$self->{FilterEnvelope} }();
123 if ( defined *$self->{FH} ) {
124 defined *$self->{FH}->write( $data, length $data )
125 or return $self->saveErrorString(0, $!, $!);
128 ${ *$self->{Buffer} } .= $data ;
136 return ( 'MultiStream' => [1, 1, Parse_boolean, 1],
145 my $got = shift || IO::Compress::Base::Parameters::new();
150 'AutoClose' => [1, 1, Parse_boolean, 0],
151 #'Encode' => [1, 1, Parse_any, undef],
152 'Strict' => [0, 1, Parse_boolean, 1],
153 'Append' => [1, 1, Parse_boolean, 0],
154 'BinModeIn' => [1, 1, Parse_boolean, 0],
156 'FilterEnvelope' => [1, 1, Parse_any, undef],
158 $self->getExtraParams(),
159 *$self->{OneShot} ? $self->getOneShotParams()
162 @_) or $self->croakError("${class}: $got->{Error}") ;
172 *$obj->{Closed} = 1 ;
174 my $class = ref $obj;
175 $obj->croakError("$class: Missing Output parameter")
178 my $outValue = shift ;
184 $got = $obj->checkParams($class, undef, @_)
188 my $lax = ! $got->value('Strict') ;
190 my $outType = whatIsOutput($outValue);
192 $obj->ckOutputParam($class, $outValue)
195 if ($outType eq 'buffer') {
196 *$obj->{Buffer} = $outValue;
200 *$obj->{Buffer} = \$buff ;
203 # Merge implies Append
204 my $merge = $got->value('Merge') ;
205 my $appendOutput = $got->value('Append') || $merge ;
206 *$obj->{Append} = $appendOutput;
207 *$obj->{FilterEnvelope} = $got->value('FilterEnvelope') ;
211 # Switch off Merge mode if output file/buffer is empty/doesn't exist
212 if (($outType eq 'buffer' && length $$outValue == 0 ) ||
213 ($outType ne 'buffer' && (! -e $outValue || (-w _ && -z _))) )
217 # If output is a file, check that it is writable
218 if ($outType eq 'filename' && -e $outValue && ! -w _)
219 { return $obj->saveErrorString(undef, "Output file '$outValue' is not writable" ) }
223 if ($got->parsed('Encode')) {
224 my $want_encoding = $got->value('Encode');
225 *$obj->{Encoding} = getEncoding($obj, $class, $want_encoding);
229 or $obj->croakError("${class}: " . $obj->error());
232 $obj->saveStatus(STATUS_OK) ;
237 *$obj->{Compress} = $obj->mkComp($class, $got)
240 *$obj->{UnCompSize} = new U64 ;
241 *$obj->{CompSize} = new U64 ;
243 if ( $outType eq 'buffer') {
244 ${ *$obj->{Buffer} } = ''
245 unless $appendOutput ;
248 if ($outType eq 'handle') {
249 *$obj->{FH} = $outValue ;
250 setBinModeOutput(*$obj->{FH}) ;
252 *$obj->{Handle} = 1 ;
255 seek(*$obj->{FH}, 0, SEEK_END)
256 or return $obj->saveErrorString(undef, "Cannot seek to end of output filehandle: $!", $!) ;
260 elsif ($outType eq 'filename') {
264 *$obj->{FH} = new IO::File "$mode $outValue"
265 or return $obj->saveErrorString(undef, "cannot open file '$outValue': $!", $!) ;
266 *$obj->{StdIO} = ($outValue eq '-');
267 setBinModeOutput(*$obj->{FH}) ;
271 *$obj->{Header} = $obj->mkHeader($got) ;
272 $obj->output( *$obj->{Header} )
277 *$obj->{Compress} = $obj->createMerge($outValue, $outType)
281 *$obj->{Closed} = 0 ;
282 *$obj->{AutoClose} = $got->value('AutoClose') ;
283 *$obj->{Output} = $outValue;
284 *$obj->{ClassName} = $class;
286 *$obj->{OneShot} = 0 ;
295 my $outType = whatIsOutput($_[0]);
297 $self->croakError("$from: output parameter not a filename, filehandle or scalar ref")
300 $self->croakError("$from: output filename is undef or null string")
301 if $outType eq 'filename' && (! defined $_[0] || $_[0] eq '') ;
303 $self->croakError("$from: output buffer is read-only")
304 if $outType eq 'buffer' && readonly(${ $_[0] });
314 my $class= (caller)[0] ;
315 my $name = (caller(1))[3] ;
317 $obj->croakError("$name: expected at least 1 parameters\n")
324 my $x = new Validator($class, *$obj->{Error}, $name, $input, $output)
327 push @_, $output if $haveOut && $x->{Hash};
329 *$obj->{OneShot} = 1 ;
331 my $got = $obj->checkParams($name, undef, @_)
338 # while (my($k, $v) = each %$input)
341 # unless defined $v ;
343 # $obj->_singleTarget($x, 1, $k, $v, @_)
347 # return keys %$input ;
353 foreach my $pair (@{ $x->{Pairs} })
355 my ($from, $to) = @$pair ;
356 $obj->_singleTarget($x, 1, $from, $to, @_)
360 return scalar @{ $x->{Pairs} } ;
363 if (! $x->{oneOutput} )
365 my $inFile = ($x->{inType} eq 'filenames'
366 || $x->{inType} eq 'filename');
368 $x->{inType} = $inFile ? 'filename' : 'buffer';
370 foreach my $in ($x->{oneInput} ? $input : @$input)
375 $obj->_singleTarget($x, $inFile, $in, \$out, @_)
378 push @$output, \$out ;
379 #if ($x->{outType} eq 'array')
380 # { push @$output, \$out }
382 # { $output->{$in} = \$out }
388 # finally the 1 to 1 and n to 1
389 return $obj->_singleTarget($x, 1, $input, $output, @_);
391 croak "should not be here" ;
398 my $inputIsFilename = shift;
403 $obj->getFileInfo($x->{Got}, $input)
404 if isaFilename($input) and $inputIsFilename ;
406 my $z = $obj->_create($x->{Got}, @_)
410 defined $z->_wr2($input, $inputIsFilename)
411 or return $z->closeError(undef) ;
418 my $inputIsFilename = ($x->{inType} ne 'array');
419 my $keep = $x->{Got}->clone();
421 #for my $element ( ($x->{inType} eq 'hash') ? keys %$input : @$input)
422 for my $element ( @$input)
424 my $isFilename = isaFilename($element);
426 if ( $afterFirst ++ )
428 defined addInterStream($obj, $element, $isFilename)
429 or return $obj->closeError(undef) ;
433 $obj->getFileInfo($x->{Got}, $element)
436 $obj->_create($x->{Got}, @_)
440 defined $obj->_wr2($element, $isFilename)
441 or return $obj->closeError(undef) ;
443 *$obj->{Got} = $keep->clone();
445 return $obj->close() ;
455 my $inputIsFilename = shift;
457 my $input = $source ;
458 if (! $inputIsFilename)
464 if ( ref $input && ref $input eq 'SCALAR' )
466 return $self->syswrite($input, @_) ;
469 if ( ! ref $input || isaFilehandle($input))
471 my $isFilehandle = isaFilehandle($input) ;
475 if ( ! $isFilehandle )
477 $fh = new IO::File "<$input"
478 or return $self->saveErrorString(undef, "cannot open file '$input': $!", $!) ;
480 binmode $fh if *$self->{Got}->valueOrDefault('BinModeIn') ;
485 while (($status = read($fh, $buff, 16 * 1024)) > 0) {
486 $count += length $buff;
487 defined $self->syswrite($buff, @_)
491 return $self->saveErrorString(undef, $!, $!)
494 if ( (!$isFilehandle || *$self->{AutoClose}) && $input ne '-')
503 croak "Should not be here";
511 my $inputIsFilename = shift ;
513 if (*$self->{Got}->value('MultiStream'))
515 $self->getFileInfo(*$self->{Got}, $input)
516 #if isaFilename($input) and $inputIsFilename ;
517 if isaFilename($input) ;
519 # TODO -- newStream needs to allow gzip/zip header to be modified
520 return $self->newStream();
522 elsif (*$self->{Got}->value('AutoFlush'))
524 #return $self->flush(Z_FULL_FLUSH);
536 return $_[0] if ref($_[0]);
550 # TODO - memory leak with 5.8.0 - this isn't called until
559 sub filterUncompressed
569 $self->croakError( *$self->{ClassName} . "::write: not a scalar reference" )
570 unless ref $_[0] eq 'SCALAR' ;
577 $] >= 5.008 and ( utf8::downgrade($$buffer, 1)
578 or croak "Wide character in " . *$self->{ClassName} . "::write:");
582 my $slen = defined $$buffer ? length($$buffer) : 0;
585 $len = $_[1] if $_[1] < $len;
588 $offset = $_[2] || 0;
589 $self->croakError(*$self->{ClassName} . "::write: offset outside string")
593 $self->croakError( *$self->{ClassName} . "::write: offset outside string") if $offset < 0;
595 my $rem = $slen - $offset;
596 $len = $rem if $rem < $len;
599 $buffer = \substr($$buffer, $offset, $len) ;
602 return 0 if ! defined $$buffer || length $$buffer == 0 ;
604 if (*$self->{Encoding}) {
605 $$buffer = *$self->{Encoding}->encode($$buffer);
608 $self->filterUncompressed($buffer);
610 my $buffer_length = defined $$buffer ? length($$buffer) : 0 ;
611 *$self->{UnCompSize}->add($buffer_length) ;
614 my $status = *$self->{Compress}->compr($buffer, $outBuffer) ;
616 return $self->saveErrorString(undef, *$self->{Compress}{Error},
617 *$self->{Compress}{ErrorNo})
618 if $status == STATUS_ERROR;
620 *$self->{CompSize}->add(length $outBuffer) ;
622 $self->output($outBuffer)
625 return $buffer_length;
633 # $self = *$self{GLOB} ;
638 defined $self->syswrite(join($,, @_) . $\);
640 defined $self->syswrite(join("", @_) . $\);
644 defined $self->syswrite(join($,, @_));
646 defined $self->syswrite(join("", @_));
655 defined $self->syswrite(sprintf($fmt, @_));
665 my $status = *$self->{Compress}->flush($outBuffer, @_) ;
666 return $self->saveErrorString(0, *$self->{Compress}{Error},
667 *$self->{Compress}{ErrorNo})
668 if $status == STATUS_ERROR;
670 if ( defined *$self->{FH} ) {
671 *$self->{FH}->clearerr();
674 *$self->{CompSize}->add(length $outBuffer) ;
676 $self->output($outBuffer)
679 if ( defined *$self->{FH} ) {
680 defined *$self->{FH}->flush()
681 or return $self->saveErrorString(0, $!, $!);
691 $self->_writeTrailer()
694 my $got = $self->checkParams('newStream', *$self->{Got}, @_)
697 $self->ckParams($got)
698 or $self->croakError("newStream: $self->{Error}");
700 *$self->{Header} = $self->mkHeader($got) ;
701 $self->output(*$self->{Header} )
704 my $status = $self->reset() ;
705 return $self->saveErrorString(0, *$self->{Compress}{Error},
706 *$self->{Compress}{ErrorNo})
707 if $status == STATUS_ERROR;
709 *$self->{UnCompSize}->reset();
710 *$self->{CompSize}->reset();
718 return *$self->{Compress}->reset() ;
727 my $status = *$self->{Compress}->close($trailer) ;
728 return $self->saveErrorString(0, *$self->{Compress}{Error}, *$self->{Compress}{ErrorNo})
729 if $status == STATUS_ERROR;
731 *$self->{CompSize}->add(length $trailer) ;
733 $trailer .= $self->mkTrailer();
737 return $self->output($trailer);
740 sub _writeFinalTrailer
744 return $self->output($self->mkFinalTrailer());
751 return 1 if *$self->{Closed} || ! *$self->{Compress} ;
752 *$self->{Closed} = 1 ;
757 $self->_writeTrailer()
760 $self->_writeFinalTrailer()
763 $self->output( "", 1 )
766 if (defined *$self->{FH}) {
768 #if (! *$self->{Handle} || *$self->{AutoClose}) {
769 if ((! *$self->{Handle} || *$self->{AutoClose}) && ! *$self->{StdIO}) {
771 *$self->{FH}->close()
772 or return $self->saveErrorString(0, $!, $!);
774 delete *$self->{FH} ;
775 # This delete can set $! in older Perls, so reset the errno
790 # return *$self->{Compress}->crc32() ;
796 # return *$self->{Compress}->msg() ;
802 # return *$self->{Compress}->dict_adler() ;
808 # return *$self->{Compress}->get_Level() ;
814 # return *$self->{Compress}->get_Strategy() ;
822 return *$self->{UnCompSize}->get32bit() ;
829 return *$self->{Closed} ;
836 my $position = shift;
839 my $here = $self->tell() ;
842 #use IO::Handle qw(SEEK_SET SEEK_CUR SEEK_END);
845 if ($whence == IO::Handle::SEEK_SET) {
846 $target = $position ;
848 elsif ($whence == IO::Handle::SEEK_CUR || $whence == IO::Handle::SEEK_END) {
849 $target = $here + $position ;
852 $self->croakError(*$self->{ClassName} . "::seek: unknown value, $whence, for whence parameter");
855 # short circuit if seeking to current offset
856 return 1 if $target == $here ;
858 # Outlaw any attempt to seek backwards
859 $self->croakError(*$self->{ClassName} . "::seek: cannot seek backwards")
862 # Walk the file to the new offset
863 my $offset = $target - $here ;
866 defined $self->syswrite("\x00" x $offset)
876 # return defined *$self->{FH}
877 # ? binmode *$self->{FH}
884 return defined *$self->{FH}
885 ? *$self->{FH}->fileno()
892 return ! *$self->{Closed} ;
898 return defined *$self->{FH}
899 ? *$self->{FH}->autoflush(@_)
903 sub input_line_number
912 return sub { croak "$name Not Available: File opened only for output" ; } ;
915 *read = _notAvailable('read');
916 *READ = _notAvailable('read');
917 *readline = _notAvailable('readline');
918 *READLINE = _notAvailable('readline');
919 *getc = _notAvailable('getc');
920 *GETC = _notAvailable('getc');
931 *BINMODE = \&binmode;
933 #*sysread = \&_notAvailable;
934 #*syswrite = \&_write;
943 IO::Compress::Base - Base Class for IO::Compress modules
948 use IO::Compress::Base ;
953 This module is not intended for direct use in application code. Its sole
954 purpose if to to be sub-classed by IO::Compress modules.
961 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>
963 L<Compress::Zlib::FAQ|Compress::Zlib::FAQ>
965 L<File::GlobMapper|File::GlobMapper>, L<Archive::Zip|Archive::Zip>,
966 L<Archive::Tar|Archive::Tar>,
975 This module was written by Paul Marquess, F<pmqs@cpan.org>.
979 =head1 MODIFICATION HISTORY
981 See the Changes file.
983 =head1 COPYRIGHT AND LICENSE
985 Copyright (c) 2005-2007 Paul Marquess. All rights reserved.
987 This program is free software; you can redistribute it and/or
988 modify it under the same terms as Perl itself.