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PK ٚ!\�[��a| a| RawInflate.pmnu �[��� package IO::Uncompress::RawInflate ; # for RFC1951 use strict ; use warnings; use bytes; use Compress::Raw::Zlib 2.101 ; use IO::Compress::Base::Common 2.101 qw(:Status ); use IO::Uncompress::Base 2.101 ; use IO::Uncompress::Adapter::Inflate 2.101 ; require Exporter ; our ($VERSION, @ISA, @EXPORT_OK, %EXPORT_TAGS, %DEFLATE_CONSTANTS, $RawInflateError); $VERSION = '2.102'; $RawInflateError = ''; @ISA = qw(IO::Uncompress::Base Exporter); @EXPORT_OK = qw( $RawInflateError rawinflate ) ; %DEFLATE_CONSTANTS = (); %EXPORT_TAGS = %IO::Uncompress::Base::EXPORT_TAGS ; push @{ $EXPORT_TAGS{all} }, @EXPORT_OK ; Exporter::export_ok_tags('all'); #{ # # Execute at runtime # my %bad; # for my $module (qw(Compress::Raw::Zlib IO::Compress::Base::Common IO::Uncompress::Base IO::Uncompress::Adapter::Inflate)) # { # my $ver = ${ $module . "::VERSION"} ; # # $bad{$module} = $ver # if $ver ne $VERSION; # } # # if (keys %bad) # { # my $string = join "\n", map { "$_ $bad{$_}" } keys %bad; # die caller(0)[0] . "needs version $VERSION mismatch\n$string\n"; # } #} sub new { my $class = shift ; my $obj = IO::Compress::Base::Common::createSelfTiedObject($class, \$RawInflateError); $obj->_create(undef, 0, @_); } sub rawinflate { my $obj = IO::Compress::Base::Common::createSelfTiedObject(undef, \$RawInflateError); return $obj->_inf(@_); } sub getExtraParams { return (); } sub ckParams { my $self = shift ; my $got = shift ; return 1; } sub mkUncomp { my $self = shift ; my $got = shift ; my ($obj, $errstr, $errno) = IO::Uncompress::Adapter::Inflate::mkUncompObject( $got->getValue('crc32'), $got->getValue('adler32'), $got->getValue('scan'), ); return $self->saveErrorString(undef, $errstr, $errno) if ! defined $obj; *$self->{Uncomp} = $obj; my $magic = $self->ckMagic() or return 0; *$self->{Info} = $self->readHeader($magic) or return undef ; return 1; } sub ckMagic { my $self = shift; return $self->_isRaw() ; } sub readHeader { my $self = shift; my $magic = shift ; return { 'Type' => 'rfc1951', 'FingerprintLength' => 0, 'HeaderLength' => 0, 'TrailerLength' => 0, 'Header' => '' }; } sub chkTrailer { return STATUS_OK ; } sub _isRaw { my $self = shift ; my $got = $self->_isRawx(@_); if ($got) { *$self->{Pending} = *$self->{HeaderPending} ; } else { $self->pushBack(*$self->{HeaderPending}); *$self->{Uncomp}->reset(); } *$self->{HeaderPending} = ''; return $got ; } sub _isRawx { my $self = shift ; my $magic = shift ; $magic = '' unless defined $magic ; my $buffer = ''; $self->smartRead(\$buffer, *$self->{BlockSize}) >= 0 or return $self->saveErrorString(undef, "No data to read"); my $temp_buf = $magic . $buffer ; *$self->{HeaderPending} = $temp_buf ; $buffer = ''; my $status = *$self->{Uncomp}->uncompr(\$temp_buf, \$buffer, $self->smartEof()) ; return $self->saveErrorString(undef, *$self->{Uncomp}{Error}, STATUS_ERROR) if $status == STATUS_ERROR; $self->pushBack($temp_buf) ; return $self->saveErrorString(undef, "unexpected end of file", STATUS_ERROR) if $self->smartEof() && $status != STATUS_ENDSTREAM; #my $buf_len = *$self->{Uncomp}->uncompressedBytes(); my $buf_len = length $buffer; if ($status == STATUS_ENDSTREAM) { if (*$self->{MultiStream} && (length $temp_buf || ! $self->smartEof())){ *$self->{NewStream} = 1 ; *$self->{EndStream} = 0 ; } else { *$self->{EndStream} = 1 ; } } *$self->{HeaderPending} = $buffer ; *$self->{InflatedBytesRead} = $buf_len ; *$self->{TotalInflatedBytesRead} += $buf_len ; *$self->{Type} = 'rfc1951'; $self->saveStatus(STATUS_OK); return { 'Type' => 'rfc1951', 'HeaderLength' => 0, 'TrailerLength' => 0, 'Header' => '' }; } sub inflateSync { my $self = shift ; # inflateSync is a no-op in Plain mode return 1 if *$self->{Plain} ; return 0 if *$self->{Closed} ; #return G_EOF if !length *$self->{Pending} && *$self->{EndStream} ; return 0 if ! length *$self->{Pending} && *$self->{EndStream} ; # Disable CRC check *$self->{Strict} = 0 ; my $status ; while (1) { my $temp_buf ; if (length *$self->{Pending} ) { $temp_buf = *$self->{Pending} ; *$self->{Pending} = ''; } else { $status = $self->smartRead(\$temp_buf, *$self->{BlockSize}) ; return $self->saveErrorString(0, "Error Reading Data") if $status < 0 ; if ($status == 0 ) { *$self->{EndStream} = 1 ; return $self->saveErrorString(0, "unexpected end of file", STATUS_ERROR); } } $status = *$self->{Uncomp}->sync($temp_buf) ; if ($status == STATUS_OK) { *$self->{Pending} .= $temp_buf ; return 1 ; } last unless $status == STATUS_ERROR ; } return 0; } #sub performScan #{ # my $self = shift ; # # my $status ; # my $end_offset = 0; # # $status = $self->scan() # #or return $self->saveErrorString(undef, "Error Scanning: $$error_ref", $self->errorNo) ; # or return $self->saveErrorString(G_ERR, "Error Scanning: $status") # # $status = $self->zap($end_offset) # or return $self->saveErrorString(G_ERR, "Error Zapping: $status"); # #or return $self->saveErrorString(undef, "Error Zapping: $$error_ref", $self->errorNo) ; # # #(*$obj->{Deflate}, $status) = $inf->createDeflate(); # ## *$obj->{Header} = *$inf->{Info}{Header}; ## *$obj->{UnCompSize_32bit} = ## *$obj->{BytesWritten} = *$inf->{UnCompSize_32bit} ; ## *$obj->{CompSize_32bit} = *$inf->{CompSize_32bit} ; # # ## if ( $outType eq 'buffer') ## { substr( ${ *$self->{Buffer} }, $end_offset) = '' } ## elsif ($outType eq 'handle' || $outType eq 'filename') { ## *$self->{FH} = *$inf->{FH} ; ## delete *$inf->{FH}; ## *$obj->{FH}->flush() ; ## *$obj->{Handle} = 1 if $outType eq 'handle'; ## ## #seek(*$obj->{FH}, $end_offset, SEEK_SET) ## *$obj->{FH}->seek($end_offset, SEEK_SET) ## or return $obj->saveErrorString(undef, $!, $!) ; ## } # #} sub scan { my $self = shift ; return 1 if *$self->{Closed} ; return 1 if !length *$self->{Pending} && *$self->{EndStream} ; my $buffer = '' ; my $len = 0; $len = $self->_raw_read(\$buffer, 1) while ! *$self->{EndStream} && $len >= 0 ; #return $len if $len < 0 ? $len : 0 ; return $len < 0 ? 0 : 1 ; } sub zap { my $self = shift ; my $headerLength = *$self->{Info}{HeaderLength}; my $block_offset = $headerLength + *$self->{Uncomp}->getLastBlockOffset(); $_[0] = $headerLength + *$self->{Uncomp}->getEndOffset(); #printf "# End $_[0], headerlen $headerLength \n";; #printf "# block_offset $block_offset %x\n", $block_offset; my $byte ; ( $self->smartSeek($block_offset) && $self->smartRead(\$byte, 1) ) or return $self->saveErrorString(0, $!, $!); #printf "#byte is %x\n", unpack('C*',$byte); *$self->{Uncomp}->resetLastBlockByte($byte); #printf "#to byte is %x\n", unpack('C*',$byte); ( $self->smartSeek($block_offset) && $self->smartWrite($byte) ) or return $self->saveErrorString(0, $!, $!); #$self->smartSeek($end_offset, 1); return 1 ; } sub createDeflate { my $self = shift ; my ($def, $status) = *$self->{Uncomp}->createDeflateStream( -AppendOutput => 1, -WindowBits => - MAX_WBITS, -CRC32 => *$self->{Params}->getValue('crc32'), -ADLER32 => *$self->{Params}->getValue('adler32'), ); return wantarray ? ($status, $def) : $def ; } 1; __END__ =head1 NAME IO::Uncompress::RawInflate - Read RFC 1951 files/buffers =head1 SYNOPSIS use IO::Uncompress::RawInflate qw(rawinflate $RawInflateError) ; my $status = rawinflate $input => $output [,OPTS] or die "rawinflate failed: $RawInflateError\n"; my $z = IO::Uncompress::RawInflate->new( $input [OPTS] ) or die "rawinflate failed: $RawInflateError\n"; $status = $z->read($buffer) $status = $z->read($buffer, $length) $status = $z->read($buffer, $length, $offset) $line = $z->getline() $char = $z->getc() $char = $z->ungetc() $char = $z->opened() $status = $z->inflateSync() $data = $z->trailingData() $status = $z->nextStream() $data = $z->getHeaderInfo() $z->tell() $z->seek($position, $whence) $z->binmode() $z->fileno() $z->eof() $z->close() $RawInflateError ; # IO::File mode <$z> read($z, $buffer); read($z, $buffer, $length); read($z, $buffer, $length, $offset); tell($z) seek($z, $position, $whence) binmode($z) fileno($z) eof($z) close($z) =head1 DESCRIPTION This module provides a Perl interface that allows the reading of files/buffers that conform to RFC 1951. For writing RFC 1951 files/buffers, see the companion module IO::Compress::RawDeflate. =head1 Functional Interface A top-level function, C<rawinflate>, is provided to carry out "one-shot" uncompression between buffers and/or files. For finer control over the uncompression process, see the L</"OO Interface"> section. use IO::Uncompress::RawInflate qw(rawinflate $RawInflateError) ; rawinflate $input_filename_or_reference => $output_filename_or_reference [,OPTS] or die "rawinflate failed: $RawInflateError\n"; The functional interface needs Perl5.005 or better. =head2 rawinflate $input_filename_or_reference => $output_filename_or_reference [, OPTS] C<rawinflate> expects at least two parameters, C<$input_filename_or_reference> and C<$output_filename_or_reference> and zero or more optional parameters (see L</Optional Parameters>) =head3 The C<$input_filename_or_reference> parameter The parameter, C<$input_filename_or_reference>, is used to define the source of the compressed data. It can take one of the following forms: =over 5 =item A filename If the C<$input_filename_or_reference> parameter is a simple scalar, it is assumed to be a filename. This file will be opened for reading and the input data will be read from it. =item A filehandle If the C<$input_filename_or_reference> parameter is a filehandle, the input data will be read from it. The string '-' can be used as an alias for standard input. =item A scalar reference If C<$input_filename_or_reference> is a scalar reference, the input data will be read from C<$$input_filename_or_reference>. =item An array reference If C<$input_filename_or_reference> is an array reference, each element in the array must be a filename. The input data will be read from each file in turn. The complete array will be walked to ensure that it only contains valid filenames before any data is uncompressed. =item An Input FileGlob string If C<$input_filename_or_reference> is a string that is delimited by the characters "<" and ">" C<rawinflate> will assume that it is an I<input fileglob string>. The input is the list of files that match the fileglob. See L<File::GlobMapper|File::GlobMapper> for more details. =back If the C<$input_filename_or_reference> parameter is any other type, C<undef> will be returned. =head3 The C<$output_filename_or_reference> parameter The parameter C<$output_filename_or_reference> is used to control the destination of the uncompressed data. This parameter can take one of these forms. =over 5 =item A filename If the C<$output_filename_or_reference> parameter is a simple scalar, it is assumed to be a filename. This file will be opened for writing and the uncompressed data will be written to it. =item A filehandle If the C<$output_filename_or_reference> parameter is a filehandle, the uncompressed data will be written to it. The string '-' can be used as an alias for standard output. =item A scalar reference If C<$output_filename_or_reference> is a scalar reference, the uncompressed data will be stored in C<$$output_filename_or_reference>. =item An Array Reference If C<$output_filename_or_reference> is an array reference, the uncompressed data will be pushed onto the array. =item An Output FileGlob If C<$output_filename_or_reference> is a string that is delimited by the characters "<" and ">" C<rawinflate> will assume that it is an I<output fileglob string>. The output is the list of files that match the fileglob. When C<$output_filename_or_reference> is an fileglob string, C<$input_filename_or_reference> must also be a fileglob string. Anything else is an error. See L<File::GlobMapper|File::GlobMapper> for more details. =back If the C<$output_filename_or_reference> parameter is any other type, C<undef> will be returned. =head2 Notes When C<$input_filename_or_reference> maps to multiple compressed files/buffers and C<$output_filename_or_reference> is a single file/buffer, after uncompression C<$output_filename_or_reference> will contain a concatenation of all the uncompressed data from each of the input files/buffers. =head2 Optional Parameters The optional parameters for the one-shot function C<rawinflate> are (for the most part) identical to those used with the OO interface defined in the L</"Constructor Options"> section. The exceptions are listed below =over 5 =item C<< AutoClose => 0|1 >> This option applies to any input or output data streams to C<rawinflate> that are filehandles. If C<AutoClose> is specified, and the value is true, it will result in all input and/or output filehandles being closed once C<rawinflate> has completed. This parameter defaults to 0. =item C<< BinModeOut => 0|1 >> This option is now a no-op. All files will be written in binmode. =item C<< Append => 0|1 >> The behaviour of this option is dependent on the type of output data stream. =over 5 =item * A Buffer If C<Append> is enabled, all uncompressed data will be append to the end of the output buffer. Otherwise the output buffer will be cleared before any uncompressed data is written to it. =item * A Filename If C<Append> is enabled, the file will be opened in append mode. Otherwise the contents of the file, if any, will be truncated before any uncompressed data is written to it. =item * A Filehandle If C<Append> is enabled, the filehandle will be positioned to the end of the file via a call to C<seek> before any uncompressed data is written to it. Otherwise the file pointer will not be moved. =back When C<Append> is specified, and set to true, it will I<append> all uncompressed data to the output data stream. So when the output is a filehandle it will carry out a seek to the eof before writing any uncompressed data. If the output is a filename, it will be opened for appending. If the output is a buffer, all uncompressed data will be appended to the existing buffer. Conversely when C<Append> is not specified, or it is present and is set to false, it will operate as follows. When the output is a filename, it will truncate the contents of the file before writing any uncompressed data. If the output is a filehandle its position will not be changed. If the output is a buffer, it will be wiped before any uncompressed data is output. Defaults to 0. =item C<< MultiStream => 0|1 >> This option is a no-op. =item C<< TrailingData => $scalar >> Returns the data, if any, that is present immediately after the compressed data stream once uncompression is complete. This option can be used when there is useful information immediately following the compressed data stream, and you don't know the length of the compressed data stream. If the input is a buffer, C<trailingData> will return everything from the end of the compressed data stream to the end of the buffer. If the input is a filehandle, C<trailingData> will return the data that is left in the filehandle input buffer once the end of the compressed data stream has been reached. You can then use the filehandle to read the rest of the input file. Don't bother using C<trailingData> if the input is a filename. If you know the length of the compressed data stream before you start uncompressing, you can avoid having to use C<trailingData> by setting the C<InputLength> option. =back =head2 Examples To read the contents of the file C<file1.txt.1951> and write the uncompressed data to the file C<file1.txt>. use strict ; use warnings ; use IO::Uncompress::RawInflate qw(rawinflate $RawInflateError) ; my $input = "file1.txt.1951"; my $output = "file1.txt"; rawinflate $input => $output or die "rawinflate failed: $RawInflateError\n"; To read from an existing Perl filehandle, C<$input>, and write the uncompressed data to a buffer, C<$buffer>. use strict ; use warnings ; use IO::Uncompress::RawInflate qw(rawinflate $RawInflateError) ; use IO::File ; my $input = IO::File->new( "<file1.txt.1951" ) or die "Cannot open 'file1.txt.1951': $!\n" ; my $buffer ; rawinflate $input => \$buffer or die "rawinflate failed: $RawInflateError\n"; To uncompress all files in the directory "/my/home" that match "*.txt.1951" and store the compressed data in the same directory use strict ; use warnings ; use IO::Uncompress::RawInflate qw(rawinflate $RawInflateError) ; rawinflate '</my/home/*.txt.1951>' => '</my/home/#1.txt>' or die "rawinflate failed: $RawInflateError\n"; and if you want to compress each file one at a time, this will do the trick use strict ; use warnings ; use IO::Uncompress::RawInflate qw(rawinflate $RawInflateError) ; for my $input ( glob "/my/home/*.txt.1951" ) { my $output = $input; $output =~ s/.1951// ; rawinflate $input => $output or die "Error compressing '$input': $RawInflateError\n"; } =head1 OO Interface =head2 Constructor The format of the constructor for IO::Uncompress::RawInflate is shown below my $z = IO::Uncompress::RawInflate->new( $input [OPTS] ) or die "IO::Uncompress::RawInflate failed: $RawInflateError\n"; Returns an C<IO::Uncompress::RawInflate> object on success and undef on failure. The variable C<$RawInflateError> will contain an error message on failure. If you are running Perl 5.005 or better the object, C<$z>, returned from IO::Uncompress::RawInflate can be used exactly like an L<IO::File|IO::File> filehandle. This means that all normal input file operations can be carried out with C<$z>. For example, to read a line from a compressed file/buffer you can use either of these forms $line = $z->getline(); $line = <$z>; The mandatory parameter C<$input> is used to determine the source of the compressed data. This parameter can take one of three forms. =over 5 =item A filename If the C<$input> parameter is a scalar, it is assumed to be a filename. This file will be opened for reading and the compressed data will be read from it. =item A filehandle If the C<$input> parameter is a filehandle, the compressed data will be read from it. The string '-' can be used as an alias for standard input. =item A scalar reference If C<$input> is a scalar reference, the compressed data will be read from C<$$input>. =back =head2 Constructor Options The option names defined below are case insensitive and can be optionally prefixed by a '-'. So all of the following are valid -AutoClose -autoclose AUTOCLOSE autoclose OPTS is a combination of the following options: =over 5 =item C<< AutoClose => 0|1 >> This option is only valid when the C<$input> parameter is a filehandle. If specified, and the value is true, it will result in the file being closed once either the C<close> method is called or the IO::Uncompress::RawInflate object is destroyed. This parameter defaults to 0. =item C<< MultiStream => 0|1 >> Allows multiple concatenated compressed streams to be treated as a single compressed stream. Decompression will stop once either the end of the file/buffer is reached, an error is encountered (premature eof, corrupt compressed data) or the end of a stream is not immediately followed by the start of another stream. This parameter defaults to 0. =item C<< Prime => $string >> This option will uncompress the contents of C<$string> before processing the input file/buffer. This option can be useful when the compressed data is embedded in another file/data structure and it is not possible to work out where the compressed data begins without having to read the first few bytes. If this is the case, the uncompression can be I<primed> with these bytes using this option. =item C<< Transparent => 0|1 >> If this option is set and the input file/buffer is not compressed data, the module will allow reading of it anyway. In addition, if the input file/buffer does contain compressed data and there is non-compressed data immediately following it, setting this option will make this module treat the whole file/buffer as a single data stream. This option defaults to 1. =item C<< BlockSize => $num >> When reading the compressed input data, IO::Uncompress::RawInflate will read it in blocks of C<$num> bytes. This option defaults to 4096. =item C<< InputLength => $size >> When present this option will limit the number of compressed bytes read from the input file/buffer to C<$size>. This option can be used in the situation where there is useful data directly after the compressed data stream and you know beforehand the exact length of the compressed data stream. This option is mostly used when reading from a filehandle, in which case the file pointer will be left pointing to the first byte directly after the compressed data stream. This option defaults to off. =item C<< Append => 0|1 >> This option controls what the C<read> method does with uncompressed data. If set to 1, all uncompressed data will be appended to the output parameter of the C<read> method. If set to 0, the contents of the output parameter of the C<read> method will be overwritten by the uncompressed data. Defaults to 0. =item C<< Strict => 0|1 >> This option is a no-op. =back =head2 Examples TODO =head1 Methods =head2 read Usage is $status = $z->read($buffer) Reads a block of compressed data (the size of the compressed block is determined by the C<Buffer> option in the constructor), uncompresses it and writes any uncompressed data into C<$buffer>. If the C<Append> parameter is set in the constructor, the uncompressed data will be appended to the C<$buffer> parameter. Otherwise C<$buffer> will be overwritten. Returns the number of uncompressed bytes written to C<$buffer>, zero if eof or a negative number on error. =head2 read Usage is $status = $z->read($buffer, $length) $status = $z->read($buffer, $length, $offset) $status = read($z, $buffer, $length) $status = read($z, $buffer, $length, $offset) Attempt to read C<$length> bytes of uncompressed data into C<$buffer>. The main difference between this form of the C<read> method and the previous one, is that this one will attempt to return I<exactly> C<$length> bytes. The only circumstances that this function will not is if end-of-file or an IO error is encountered. Returns the number of uncompressed bytes written to C<$buffer>, zero if eof or a negative number on error. =head2 getline Usage is $line = $z->getline() $line = <$z> Reads a single line. This method fully supports the use of the variable C<$/> (or C<$INPUT_RECORD_SEPARATOR> or C<$RS> when C<English> is in use) to determine what constitutes an end of line. Paragraph mode, record mode and file slurp mode are all supported. =head2 getc Usage is $char = $z->getc() Read a single character. =head2 ungetc Usage is $char = $z->ungetc($string) =head2 inflateSync Usage is $status = $z->inflateSync() TODO =head2 getHeaderInfo Usage is $hdr = $z->getHeaderInfo(); @hdrs = $z->getHeaderInfo(); This method returns either a hash reference (in scalar context) or a list or hash references (in array context) that contains information about each of the header fields in the compressed data stream(s). =head2 tell Usage is $z->tell() tell $z Returns the uncompressed file offset. =head2 eof Usage is $z->eof(); eof($z); Returns true if the end of the compressed input stream has been reached. =head2 seek $z->seek($position, $whence); seek($z, $position, $whence); Provides a sub-set of the C<seek> functionality, with the restriction that it is only legal to seek forward in the input file/buffer. It is a fatal error to attempt to seek backward. Note that the implementation of C<seek> in this module does not provide true random access to a compressed file/buffer. It works by uncompressing data from the current offset in the file/buffer until it reaches the uncompressed offset specified in the parameters to C<seek>. For very small files this may be acceptable behaviour. For large files it may cause an unacceptable delay. The C<$whence> parameter takes one the usual values, namely SEEK_SET, SEEK_CUR or SEEK_END. Returns 1 on success, 0 on failure. =head2 binmode Usage is $z->binmode binmode $z ; This is a noop provided for completeness. =head2 opened $z->opened() Returns true if the object currently refers to a opened file/buffer. =head2 autoflush my $prev = $z->autoflush() my $prev = $z->autoflush(EXPR) If the C<$z> object is associated with a file or a filehandle, this method returns the current autoflush setting for the underlying filehandle. If C<EXPR> is present, and is non-zero, it will enable flushing after every write/print operation. If C<$z> is associated with a buffer, this method has no effect and always returns C<undef>. B<Note> that the special variable C<$|> B<cannot> be used to set or retrieve the autoflush setting. =head2 input_line_number $z->input_line_number() $z->input_line_number(EXPR) Returns the current uncompressed line number. If C<EXPR> is present it has the effect of setting the line number. Note that setting the line number does not change the current position within the file/buffer being read. The contents of C<$/> are used to determine what constitutes a line terminator. =head2 fileno $z->fileno() fileno($z) If the C<$z> object is associated with a file or a filehandle, C<fileno> will return the underlying file descriptor. Once the C<close> method is called C<fileno> will return C<undef>. If the C<$z> object is associated with a buffer, this method will return C<undef>. =head2 close $z->close() ; close $z ; Closes the output file/buffer. For most versions of Perl this method will be automatically invoked if the IO::Uncompress::RawInflate object is destroyed (either explicitly or by the variable with the reference to the object going out of scope). The exceptions are Perl versions 5.005 through 5.00504 and 5.8.0. In these cases, the C<close> method will be called automatically, but not until global destruction of all live objects when the program is terminating. Therefore, if you want your scripts to be able to run on all versions of Perl, you should call C<close> explicitly and not rely on automatic closing. Returns true on success, otherwise 0. If the C<AutoClose> option has been enabled when the IO::Uncompress::RawInflate object was created, and the object is associated with a file, the underlying file will also be closed. =head2 nextStream Usage is my $status = $z->nextStream(); Skips to the next compressed data stream in the input file/buffer. If a new compressed data stream is found, the eof marker will be cleared and C<$.> will be reset to 0. Returns 1 if a new stream was found, 0 if none was found, and -1 if an error was encountered. =head2 trailingData Usage is my $data = $z->trailingData(); Returns the data, if any, that is present immediately after the compressed data stream once uncompression is complete. It only makes sense to call this method once the end of the compressed data stream has been encountered. This option can be used when there is useful information immediately following the compressed data stream, and you don't know the length of the compressed data stream. If the input is a buffer, C<trailingData> will return everything from the end of the compressed data stream to the end of the buffer. If the input is a filehandle, C<trailingData> will return the data that is left in the filehandle input buffer once the end of the compressed data stream has been reached. You can then use the filehandle to read the rest of the input file. Don't bother using C<trailingData> if the input is a filename. If you know the length of the compressed data stream before you start uncompressing, you can avoid having to use C<trailingData> by setting the C<InputLength> option in the constructor. =head1 Importing No symbolic constants are required by IO::Uncompress::RawInflate at present. =over 5 =item :all Imports C<rawinflate> and C<$RawInflateError>. Same as doing this use IO::Uncompress::RawInflate qw(rawinflate $RawInflateError) ; =back =head1 EXAMPLES =head2 Working with Net::FTP See L<IO::Compress::FAQ|IO::Compress::FAQ/"Compressed files and Net::FTP"> =head1 SUPPORT General feedback/questions/bug reports should be sent to L<https://github.com/pmqs/IO-Compress/issues> (preferred) or L<https://rt.cpan.org/Public/Dist/Display.html?Name=IO-Compress>. =head1 SEE ALSO 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::Compress::Bzip2>, L<IO::Uncompress::Bunzip2>, L<IO::Compress::Lzma>, L<IO::Uncompress::UnLzma>, L<IO::Compress::Xz>, L<IO::Uncompress::UnXz>, L<IO::Compress::Lzip>, L<IO::Uncompress::UnLzip>, L<IO::Compress::Lzop>, L<IO::Uncompress::UnLzop>, L<IO::Compress::Lzf>, L<IO::Uncompress::UnLzf>, L<IO::Compress::Zstd>, L<IO::Uncompress::UnZstd>, L<IO::Uncompress::AnyInflate>, L<IO::Uncompress::AnyUncompress> L<IO::Compress::FAQ|IO::Compress::FAQ> L<File::GlobMapper|File::GlobMapper>, L<Archive::Zip|Archive::Zip>, L<Archive::Tar|Archive::Tar>, L<IO::Zlib|IO::Zlib> For RFC 1950, 1951 and 1952 see L<http://www.faqs.org/rfcs/rfc1950.html>, L<http://www.faqs.org/rfcs/rfc1951.html> and L<http://www.faqs.org/rfcs/rfc1952.html> The I<zlib> compression library was written by Jean-loup Gailly C<gzip@prep.ai.mit.edu> and Mark Adler C<madler@alumni.caltech.edu>. The primary site for the I<zlib> compression library is L<http://www.zlib.org>. The primary site for gzip is L<http://www.gzip.org>. =head1 AUTHOR This module was written by Paul Marquess, C<pmqs@cpan.org>. =head1 MODIFICATION HISTORY See the Changes file. =head1 COPYRIGHT AND LICENSE Copyright (c) 2005-2021 Paul Marquess. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. PK ٚ!\ۭ�Q� � Unzip.pmnu �[��� package IO::Uncompress::Unzip; require 5.006 ; # for RFC1952 use strict ; use warnings; use bytes; use IO::File; use IO::Uncompress::RawInflate 2.101 ; use IO::Compress::Base::Common 2.101 qw(:Status ); use IO::Uncompress::Adapter::Inflate 2.101 ; use IO::Uncompress::Adapter::Identity 2.101 ; use IO::Compress::Zlib::Extra 2.101 ; use IO::Compress::Zip::Constants 2.101 ; use Compress::Raw::Zlib 2.101 () ; BEGIN { # Don't trigger any __DIE__ Hooks. local $SIG{__DIE__}; eval{ require IO::Uncompress::Adapter::Bunzip2 ; IO::Uncompress::Adapter::Bunzip2->import() } ; eval{ require IO::Uncompress::Adapter::UnLzma ; IO::Uncompress::Adapter::UnLzma->import() } ; eval{ require IO::Uncompress::Adapter::UnXz ; IO::Uncompress::Adapter::UnXz->import() } ; eval{ require IO::Uncompress::Adapter::UnZstd ; IO::Uncompress::Adapter::UnZstd->import() } ; } require Exporter ; our ($VERSION, @ISA, @EXPORT_OK, %EXPORT_TAGS, $UnzipError, %headerLookup); $VERSION = '2.102'; $UnzipError = ''; @ISA = qw(IO::Uncompress::RawInflate Exporter); @EXPORT_OK = qw( $UnzipError unzip ); %EXPORT_TAGS = %IO::Uncompress::RawInflate::EXPORT_TAGS ; push @{ $EXPORT_TAGS{all} }, @EXPORT_OK ; Exporter::export_ok_tags('all'); %headerLookup = ( ZIP_CENTRAL_HDR_SIG, \&skipCentralDirectory, ZIP_END_CENTRAL_HDR_SIG, \&skipEndCentralDirectory, ZIP64_END_CENTRAL_REC_HDR_SIG, \&skipCentralDirectory64Rec, ZIP64_END_CENTRAL_LOC_HDR_SIG, \&skipCentralDirectory64Loc, ZIP64_ARCHIVE_EXTRA_SIG, \&skipArchiveExtra, ZIP64_DIGITAL_SIGNATURE_SIG, \&skipDigitalSignature, ); my %MethodNames = ( ZIP_CM_DEFLATE() => 'Deflated', ZIP_CM_BZIP2() => 'Bzip2', ZIP_CM_LZMA() => 'Lzma', ZIP_CM_STORE() => 'Stored', ZIP_CM_XZ() => 'Xz', ZIP_CM_ZSTD() => 'Zstd', ); sub new { my $class = shift ; my $obj = IO::Compress::Base::Common::createSelfTiedObject($class, \$UnzipError); $obj->_create(undef, 0, @_); } sub unzip { my $obj = IO::Compress::Base::Common::createSelfTiedObject(undef, \$UnzipError); return $obj->_inf(@_) ; } sub getExtraParams { return ( # # Zip header fields 'name' => [IO::Compress::Base::Common::Parse_any, undef], 'stream' => [IO::Compress::Base::Common::Parse_boolean, 0], 'efs' => [IO::Compress::Base::Common::Parse_boolean, 0], # TODO - This means reading the central directory to get # 1. the local header offsets # 2. The compressed data length ); } sub ckParams { my $self = shift ; my $got = shift ; # unzip always needs crc32 $got->setValue('crc32' => 1); *$self->{UnzipData}{Name} = $got->getValue('name'); *$self->{UnzipData}{efs} = $got->getValue('efs'); return 1; } sub mkUncomp { my $self = shift ; my $got = shift ; my $magic = $self->ckMagic() or return 0; *$self->{Info} = $self->readHeader($magic) or return undef ; return 1; } sub ckMagic { my $self = shift; my $magic ; $self->smartReadExact(\$magic, 4); *$self->{HeaderPending} = $magic ; return $self->HeaderError("Minimum header size is " . 4 . " bytes") if length $magic != 4 ; return $self->HeaderError("Bad Magic") if ! _isZipMagic($magic) ; *$self->{Type} = 'zip'; return $magic ; } sub fastForward { my $self = shift; my $offset = shift; # TODO - if Stream isn't enabled & reading from file, use seek my $buffer = ''; my $c = 1024 * 16; while ($offset > 0) { $c = length $offset if length $offset < $c ; $offset -= $c; $self->smartReadExact(\$buffer, $c) or return 0; } return 1; } sub readHeader { my $self = shift; my $magic = shift ; my $name = *$self->{UnzipData}{Name} ; my $hdr = $self->_readZipHeader($magic) ; while (defined $hdr) { if (! defined $name || $hdr->{Name} eq $name) { return $hdr ; } # skip the data # TODO - when Stream is off, use seek my $buffer; if (*$self->{ZipData}{Streaming}) { while (1) { my $b; my $status = $self->smartRead(\$b, 1024 * 16); return $self->saveErrorString(undef, "Truncated file") if $status <= 0 ; my $temp_buf ; my $out; $status = *$self->{Uncomp}->uncompr(\$b, \$temp_buf, 0, $out); return $self->saveErrorString(undef, *$self->{Uncomp}{Error}, *$self->{Uncomp}{ErrorNo}) if $self->saveStatus($status) == STATUS_ERROR; $self->pushBack($b) ; if ($status == STATUS_ENDSTREAM) { *$self->{Uncomp}->reset(); last; } } # skip the trailer $self->smartReadExact(\$buffer, $hdr->{TrailerLength}) or return $self->saveErrorString(undef, "Truncated file"); } else { my $c = $hdr->{CompressedLength}->get64bit(); $self->fastForward($c) or return $self->saveErrorString(undef, "Truncated file"); $buffer = ''; } $self->chkTrailer($buffer) == STATUS_OK or return $self->saveErrorString(undef, "Truncated file"); $hdr = $self->_readFullZipHeader(); return $self->saveErrorString(undef, "Cannot find '$name'") if $self->smartEof(); } return undef; } sub chkTrailer { my $self = shift; my $trailer = shift; my ($sig, $CRC32, $cSize, $uSize) ; my ($cSizeHi, $uSizeHi) = (0, 0); if (*$self->{ZipData}{Streaming}) { $sig = unpack ("V", substr($trailer, 0, 4)); $CRC32 = unpack ("V", substr($trailer, 4, 4)); if (*$self->{ZipData}{Zip64} ) { $cSize = U64::newUnpack_V64 substr($trailer, 8, 8); $uSize = U64::newUnpack_V64 substr($trailer, 16, 8); } else { $cSize = U64::newUnpack_V32 substr($trailer, 8, 4); $uSize = U64::newUnpack_V32 substr($trailer, 12, 4); } return $self->TrailerError("Data Descriptor signature, got $sig") if $sig != ZIP_DATA_HDR_SIG; } else { ($CRC32, $cSize, $uSize) = (*$self->{ZipData}{Crc32}, *$self->{ZipData}{CompressedLen}, *$self->{ZipData}{UnCompressedLen}); } *$self->{Info}{CRC32} = *$self->{ZipData}{CRC32} ; *$self->{Info}{CompressedLength} = $cSize->get64bit(); *$self->{Info}{UncompressedLength} = $uSize->get64bit(); if (*$self->{Strict}) { return $self->TrailerError("CRC mismatch") if $CRC32 != *$self->{ZipData}{CRC32} ; return $self->TrailerError("CSIZE mismatch.") if ! $cSize->equal(*$self->{CompSize}); return $self->TrailerError("USIZE mismatch.") if ! $uSize->equal(*$self->{UnCompSize}); } my $reachedEnd = STATUS_ERROR ; # check for central directory or end of central directory while (1) { my $magic ; my $got = $self->smartRead(\$magic, 4); return $self->saveErrorString(STATUS_ERROR, "Truncated file") if $got != 4 && *$self->{Strict}; if ($got == 0) { return STATUS_EOF ; } elsif ($got < 0) { return STATUS_ERROR ; } elsif ($got < 4) { $self->pushBack($magic) ; return STATUS_OK ; } my $sig = unpack("V", $magic) ; my $hdr; if ($hdr = $headerLookup{$sig}) { if (&$hdr($self, $magic) != STATUS_OK ) { if (*$self->{Strict}) { return STATUS_ERROR ; } else { $self->clearError(); return STATUS_OK ; } } if ($sig == ZIP_END_CENTRAL_HDR_SIG) { return STATUS_OK ; last; } } elsif ($sig == ZIP_LOCAL_HDR_SIG) { $self->pushBack($magic) ; return STATUS_OK ; } else { # put the data back $self->pushBack($magic) ; last; } } return $reachedEnd ; } sub skipCentralDirectory { my $self = shift; my $magic = shift ; my $buffer; $self->smartReadExact(\$buffer, 46 - 4) or return $self->TrailerError("Minimum header size is " . 46 . " bytes") ; my $keep = $magic . $buffer ; *$self->{HeaderPending} = $keep ; #my $versionMadeBy = unpack ("v", substr($buffer, 4-4, 2)); #my $extractVersion = unpack ("v", substr($buffer, 6-4, 2)); #my $gpFlag = unpack ("v", substr($buffer, 8-4, 2)); #my $compressedMethod = unpack ("v", substr($buffer, 10-4, 2)); #my $lastModTime = unpack ("V", substr($buffer, 12-4, 4)); #my $crc32 = unpack ("V", substr($buffer, 16-4, 4)); my $compressedLength = unpack ("V", substr($buffer, 20-4, 4)); my $uncompressedLength = unpack ("V", substr($buffer, 24-4, 4)); my $filename_length = unpack ("v", substr($buffer, 28-4, 2)); my $extra_length = unpack ("v", substr($buffer, 30-4, 2)); my $comment_length = unpack ("v", substr($buffer, 32-4, 2)); #my $disk_start = unpack ("v", substr($buffer, 34-4, 2)); #my $int_file_attrib = unpack ("v", substr($buffer, 36-4, 2)); #my $ext_file_attrib = unpack ("V", substr($buffer, 38-4, 2)); #my $lcl_hdr_offset = unpack ("V", substr($buffer, 42-4, 2)); my $filename; my $extraField; my $comment ; if ($filename_length) { $self->smartReadExact(\$filename, $filename_length) or return $self->TruncatedTrailer("filename"); $keep .= $filename ; } if ($extra_length) { $self->smartReadExact(\$extraField, $extra_length) or return $self->TruncatedTrailer("extra"); $keep .= $extraField ; } if ($comment_length) { $self->smartReadExact(\$comment, $comment_length) or return $self->TruncatedTrailer("comment"); $keep .= $comment ; } return STATUS_OK ; } sub skipArchiveExtra { my $self = shift; my $magic = shift ; my $buffer; $self->smartReadExact(\$buffer, 4) or return $self->TrailerError("Minimum header size is " . 4 . " bytes") ; my $keep = $magic . $buffer ; my $size = unpack ("V", $buffer); $self->smartReadExact(\$buffer, $size) or return $self->TrailerError("Minimum header size is " . $size . " bytes") ; $keep .= $buffer ; *$self->{HeaderPending} = $keep ; return STATUS_OK ; } sub skipCentralDirectory64Rec { my $self = shift; my $magic = shift ; my $buffer; $self->smartReadExact(\$buffer, 8) or return $self->TrailerError("Minimum header size is " . 8 . " bytes") ; my $keep = $magic . $buffer ; my ($sizeLo, $sizeHi) = unpack ("V V", $buffer); my $size = $sizeHi * U64::MAX32 + $sizeLo; $self->fastForward($size) or return $self->TrailerError("Minimum header size is " . $size . " bytes") ; #$keep .= $buffer ; #*$self->{HeaderPending} = $keep ; #my $versionMadeBy = unpack ("v", substr($buffer, 0, 2)); #my $extractVersion = unpack ("v", substr($buffer, 2, 2)); #my $diskNumber = unpack ("V", substr($buffer, 4, 4)); #my $cntrlDirDiskNo = unpack ("V", substr($buffer, 8, 4)); #my $entriesInThisCD = unpack ("V V", substr($buffer, 12, 8)); #my $entriesInCD = unpack ("V V", substr($buffer, 20, 8)); #my $sizeOfCD = unpack ("V V", substr($buffer, 28, 8)); #my $offsetToCD = unpack ("V V", substr($buffer, 36, 8)); return STATUS_OK ; } sub skipCentralDirectory64Loc { my $self = shift; my $magic = shift ; my $buffer; $self->smartReadExact(\$buffer, 20 - 4) or return $self->TrailerError("Minimum header size is " . 20 . " bytes") ; my $keep = $magic . $buffer ; *$self->{HeaderPending} = $keep ; #my $startCdDisk = unpack ("V", substr($buffer, 4-4, 4)); #my $offsetToCD = unpack ("V V", substr($buffer, 8-4, 8)); #my $diskCount = unpack ("V", substr($buffer, 16-4, 4)); return STATUS_OK ; } sub skipEndCentralDirectory { my $self = shift; my $magic = shift ; my $buffer; $self->smartReadExact(\$buffer, 22 - 4) or return $self->TrailerError("Minimum header size is " . 22 . " bytes") ; my $keep = $magic . $buffer ; *$self->{HeaderPending} = $keep ; #my $diskNumber = unpack ("v", substr($buffer, 4-4, 2)); #my $cntrlDirDiskNo = unpack ("v", substr($buffer, 6-4, 2)); #my $entriesInThisCD = unpack ("v", substr($buffer, 8-4, 2)); #my $entriesInCD = unpack ("v", substr($buffer, 10-4, 2)); #my $sizeOfCD = unpack ("V", substr($buffer, 12-4, 4)); #my $offsetToCD = unpack ("V", substr($buffer, 16-4, 4)); my $comment_length = unpack ("v", substr($buffer, 20-4, 2)); my $comment ; if ($comment_length) { $self->smartReadExact(\$comment, $comment_length) or return $self->TruncatedTrailer("comment"); $keep .= $comment ; } return STATUS_OK ; } sub _isZipMagic { my $buffer = shift ; return 0 if length $buffer < 4 ; my $sig = unpack("V", $buffer) ; return $sig == ZIP_LOCAL_HDR_SIG ; } sub _readFullZipHeader($) { my ($self) = @_ ; my $magic = '' ; $self->smartReadExact(\$magic, 4); *$self->{HeaderPending} = $magic ; return $self->HeaderError("Minimum header size is " . 30 . " bytes") if length $magic != 4 ; return $self->HeaderError("Bad Magic") if ! _isZipMagic($magic) ; my $status = $self->_readZipHeader($magic); delete *$self->{Transparent} if ! defined $status ; return $status ; } sub _readZipHeader($) { my ($self, $magic) = @_ ; my ($HeaderCRC) ; my ($buffer) = '' ; $self->smartReadExact(\$buffer, 30 - 4) or return $self->HeaderError("Minimum header size is " . 30 . " bytes") ; my $keep = $magic . $buffer ; *$self->{HeaderPending} = $keep ; my $extractVersion = unpack ("v", substr($buffer, 4-4, 2)); my $gpFlag = unpack ("v", substr($buffer, 6-4, 2)); my $compressedMethod = unpack ("v", substr($buffer, 8-4, 2)); my $lastModTime = unpack ("V", substr($buffer, 10-4, 4)); my $crc32 = unpack ("V", substr($buffer, 14-4, 4)); my $compressedLength = U64::newUnpack_V32 substr($buffer, 18-4, 4); my $uncompressedLength = U64::newUnpack_V32 substr($buffer, 22-4, 4); my $filename_length = unpack ("v", substr($buffer, 26-4, 2)); my $extra_length = unpack ("v", substr($buffer, 28-4, 2)); my $filename; my $extraField; my @EXTRA = (); # Some programs (some versions of LibreOffice) mark entries as streamed, but still fill out # compressedLength/uncompressedLength & crc32 in the local file header. # The expected data descriptor is not populated. # So only assume streaming if the Streaming bit is set AND the compressed length is zero my $streamingMode = (($gpFlag & ZIP_GP_FLAG_STREAMING_MASK) && $crc32 == 0) ? 1 : 0 ; my $efs_flag = ($gpFlag & ZIP_GP_FLAG_LANGUAGE_ENCODING) ? 1 : 0; return $self->HeaderError("Encrypted content not supported") if $gpFlag & (ZIP_GP_FLAG_ENCRYPTED_MASK|ZIP_GP_FLAG_STRONG_ENCRYPTED_MASK); return $self->HeaderError("Patch content not supported") if $gpFlag & ZIP_GP_FLAG_PATCHED_MASK; *$self->{ZipData}{Streaming} = $streamingMode; if ($filename_length) { $self->smartReadExact(\$filename, $filename_length) or return $self->TruncatedHeader("Filename"); if (*$self->{UnzipData}{efs} && $efs_flag && $] >= 5.008004) { require Encode; eval { $filename = Encode::decode_utf8($filename, 1) } or Carp::croak "Zip Filename not UTF-8" ; } $keep .= $filename ; } my $zip64 = 0 ; if ($extra_length) { $self->smartReadExact(\$extraField, $extra_length) or return $self->TruncatedHeader("Extra Field"); my $bad = IO::Compress::Zlib::Extra::parseRawExtra($extraField, \@EXTRA, 1, 0); return $self->HeaderError($bad) if defined $bad; $keep .= $extraField ; my %Extra ; for (@EXTRA) { $Extra{$_->[0]} = \$_->[1]; } if (defined $Extra{ZIP_EXTRA_ID_ZIP64()}) { $zip64 = 1 ; my $buff = ${ $Extra{ZIP_EXTRA_ID_ZIP64()} }; # This code assumes that all the fields in the Zip64 # extra field aren't necessarily present. The spec says that # they only exist if the equivalent local headers are -1. if (! $streamingMode) { my $offset = 0 ; if (U64::full32 $uncompressedLength->get32bit() ) { $uncompressedLength = U64::newUnpack_V64 substr($buff, 0, 8); $offset += 8 ; } if (U64::full32 $compressedLength->get32bit() ) { $compressedLength = U64::newUnpack_V64 substr($buff, $offset, 8); $offset += 8 ; } } } } *$self->{ZipData}{Zip64} = $zip64; if (! $streamingMode) { *$self->{ZipData}{Streaming} = 0; *$self->{ZipData}{Crc32} = $crc32; *$self->{ZipData}{CompressedLen} = $compressedLength; *$self->{ZipData}{UnCompressedLen} = $uncompressedLength; *$self->{CompressedInputLengthRemaining} = *$self->{CompressedInputLength} = $compressedLength->get64bit(); } *$self->{ZipData}{CRC32} = Compress::Raw::Zlib::crc32(undef); *$self->{ZipData}{Method} = $compressedMethod; if ($compressedMethod == ZIP_CM_DEFLATE) { *$self->{Type} = 'zip-deflate'; my $obj = IO::Uncompress::Adapter::Inflate::mkUncompObject(1,0,0); *$self->{Uncomp} = $obj; } elsif ($compressedMethod == ZIP_CM_BZIP2) { return $self->HeaderError("Unsupported Compression format $compressedMethod") if ! defined $IO::Uncompress::Adapter::Bunzip2::VERSION ; *$self->{Type} = 'zip-bzip2'; my $obj = IO::Uncompress::Adapter::Bunzip2::mkUncompObject(); *$self->{Uncomp} = $obj; } elsif ($compressedMethod == ZIP_CM_XZ) { return $self->HeaderError("Unsupported Compression format $compressedMethod") if ! defined $IO::Uncompress::Adapter::UnXz::VERSION ; *$self->{Type} = 'zip-xz'; my $obj = IO::Uncompress::Adapter::UnXz::mkUncompObject(); *$self->{Uncomp} = $obj; } elsif ($compressedMethod == ZIP_CM_ZSTD) { return $self->HeaderError("Unsupported Compression format $compressedMethod") if ! defined $IO::Uncompress::Adapter::UnZstd::VERSION ; *$self->{Type} = 'zip-zstd'; my $obj = IO::Uncompress::Adapter::UnZstd::mkUncompObject(); *$self->{Uncomp} = $obj; } elsif ($compressedMethod == ZIP_CM_LZMA) { return $self->HeaderError("Unsupported Compression format $compressedMethod") if ! defined $IO::Uncompress::Adapter::UnLzma::VERSION ; *$self->{Type} = 'zip-lzma'; my $LzmaHeader; $self->smartReadExact(\$LzmaHeader, 4) or return $self->saveErrorString(undef, "Truncated file"); my ($verHi, $verLo) = unpack ("CC", substr($LzmaHeader, 0, 2)); my $LzmaPropertiesSize = unpack ("v", substr($LzmaHeader, 2, 2)); my $LzmaPropertyData; $self->smartReadExact(\$LzmaPropertyData, $LzmaPropertiesSize) or return $self->saveErrorString(undef, "Truncated file"); if (! $streamingMode) { *$self->{ZipData}{CompressedLen}->subtract(4 + $LzmaPropertiesSize) ; *$self->{CompressedInputLengthRemaining} = *$self->{CompressedInputLength} = *$self->{ZipData}{CompressedLen}->get64bit(); } my $obj = IO::Uncompress::Adapter::UnLzma::mkUncompZipObject($LzmaPropertyData); *$self->{Uncomp} = $obj; } elsif ($compressedMethod == ZIP_CM_STORE) { *$self->{Type} = 'zip-stored'; my $obj = IO::Uncompress::Adapter::Identity::mkUncompObject($streamingMode, $zip64); *$self->{Uncomp} = $obj; } else { return $self->HeaderError("Unsupported Compression format $compressedMethod"); } return { 'Type' => 'zip', 'FingerprintLength' => 4, #'HeaderLength' => $compressedMethod == 8 ? length $keep : 0, 'HeaderLength' => length $keep, 'Zip64' => $zip64, 'TrailerLength' => ! $streamingMode ? 0 : $zip64 ? 24 : 16, 'Header' => $keep, 'CompressedLength' => $compressedLength , 'UncompressedLength' => $uncompressedLength , 'CRC32' => $crc32 , 'Name' => $filename, 'efs' => $efs_flag, # language encoding flag 'Time' => _dosToUnixTime($lastModTime), 'Stream' => $streamingMode, 'MethodID' => $compressedMethod, 'MethodName' => $MethodNames{$compressedMethod} || 'Unknown', # 'TextFlag' => $flag & GZIP_FLG_FTEXT ? 1 : 0, # 'HeaderCRCFlag' => $flag & GZIP_FLG_FHCRC ? 1 : 0, # 'NameFlag' => $flag & GZIP_FLG_FNAME ? 1 : 0, # 'CommentFlag' => $flag & GZIP_FLG_FCOMMENT ? 1 : 0, # 'ExtraFlag' => $flag & GZIP_FLG_FEXTRA ? 1 : 0, # 'Comment' => $comment, # 'OsID' => $os, # 'OsName' => defined $GZIP_OS_Names{$os} # ? $GZIP_OS_Names{$os} : "Unknown", # 'HeaderCRC' => $HeaderCRC, # 'Flags' => $flag, # 'ExtraFlags' => $xfl, 'ExtraFieldRaw' => $extraField, 'ExtraField' => [ @EXTRA ], } } sub filterUncompressed { my $self = shift ; if (*$self->{ZipData}{Method} == ZIP_CM_DEFLATE) { *$self->{ZipData}{CRC32} = *$self->{Uncomp}->crc32() ; } else { *$self->{ZipData}{CRC32} = Compress::Raw::Zlib::crc32(${$_[0]}, *$self->{ZipData}{CRC32}, $_[1]); } } # from Archive::Zip & info-zip sub _dosToUnixTime { my $dt = shift; my $year = ( ( $dt >> 25 ) & 0x7f ) + 80; my $mon = ( ( $dt >> 21 ) & 0x0f ) - 1; my $mday = ( ( $dt >> 16 ) & 0x1f ); my $hour = ( ( $dt >> 11 ) & 0x1f ); my $min = ( ( $dt >> 5 ) & 0x3f ); my $sec = ( ( $dt << 1 ) & 0x3e ); use POSIX 'mktime'; my $time_t = mktime( $sec, $min, $hour, $mday, $mon, $year, 0, 0, -1 ); return 0 if ! defined $time_t; return $time_t; } #sub scanCentralDirectory #{ # # Use cases # # 1 32-bit CD # # 2 64-bit CD # # my $self = shift ; # # my @CD = (); # my $offset = $self->findCentralDirectoryOffset(); # # return 0 # if ! defined $offset; # # $self->smarkSeek($offset, 0, SEEK_SET) ; # # # Now walk the Central Directory Records # my $buffer ; # while ($self->smartReadExact(\$buffer, 46) && # unpack("V", $buffer) == ZIP_CENTRAL_HDR_SIG) { # # my $compressedLength = unpack ("V", substr($buffer, 20, 4)); # my $filename_length = unpack ("v", substr($buffer, 28, 2)); # my $extra_length = unpack ("v", substr($buffer, 30, 2)); # my $comment_length = unpack ("v", substr($buffer, 32, 2)); # # $self->smarkSeek($filename_length + $extra_length + $comment_length, 0, SEEK_CUR) # if $extra_length || $comment_length || $filename_length; # push @CD, $compressedLength ; # } # #} # #sub findCentralDirectoryOffset #{ # my $self = shift ; # # # Most common use-case is where there is no comment, so # # know exactly where the end of central directory record # # should be. # # $self->smarkSeek(-22, 0, SEEK_END) ; # # my $buffer; # $self->smartReadExact(\$buffer, 22) ; # # my $zip64 = 0; # my $centralDirOffset ; # if ( unpack("V", $buffer) == ZIP_END_CENTRAL_HDR_SIG ) { # $centralDirOffset = unpack ("V", substr($buffer, 16, 2)); # } # else { # die "xxxx"; # } # # return $centralDirOffset ; #} # #sub is84BitCD #{ # # TODO # my $self = shift ; #} sub skip { my $self = shift; my $size = shift; use Fcntl qw(SEEK_CUR); if (ref $size eq 'U64') { $self->smartSeek($size->get64bit(), SEEK_CUR); } else { $self->smartSeek($size, SEEK_CUR); } } sub scanCentralDirectory { my $self = shift; my $here = $self->tell(); # Use cases # 1 32-bit CD # 2 64-bit CD my @CD = (); my $offset = $self->findCentralDirectoryOffset(); return () if ! defined $offset; $self->smarkSeek($offset, 0, SEEK_SET) ; # Now walk the Central Directory Records my $buffer ; while ($self->smartReadExact(\$buffer, 46) && unpack("V", $buffer) == ZIP_CENTRAL_HDR_SIG) { my $compressedLength = unpack("V", substr($buffer, 20, 4)); my $uncompressedLength = unpack("V", substr($buffer, 24, 4)); my $filename_length = unpack("v", substr($buffer, 28, 2)); my $extra_length = unpack("v", substr($buffer, 30, 2)); my $comment_length = unpack("v", substr($buffer, 32, 2)); $self->skip($filename_length ) ; my $v64 = U64->new( $compressedLength ); if (U64::full32 $compressedLength ) { $self->smartReadExact(\$buffer, $extra_length) ; die "xxx $offset $comment_length $filename_length $extra_length" . length($buffer) if length($buffer) != $extra_length; my $got = $self->get64Extra($buffer, U64::full32 $uncompressedLength); # If not Zip64 extra field, assume size is 0xFFFFFFFF $v64 = $got if defined $got; } else { $self->skip($extra_length) ; } $self->skip($comment_length ) ; push @CD, $v64 ; } $self->smartSeek($here, 0, SEEK_SET) ; return @CD; } sub get64Extra { my $self = shift ; my $buffer = shift; my $is_uncomp = shift ; my $extra = IO::Compress::Zlib::Extra::findID(0x0001, $buffer); if (! defined $extra) { return undef; } else { my $u64 = U64::newUnpack_V64(substr($extra, $is_uncomp ? 8 : 0)) ; return $u64; } } sub offsetFromZip64 { my $self = shift ; my $here = shift; $self->smartSeek($here - 20, 0, SEEK_SET) or die "xx $!" ; my $buffer; my $got = 0; $self->smartReadExact(\$buffer, 20) or die "xxx $here $got $!" ; if ( unpack("V", $buffer) == ZIP64_END_CENTRAL_LOC_HDR_SIG ) { my $cd64 = U64::Value_VV64 substr($buffer, 8, 8); $self->smartSeek($cd64, 0, SEEK_SET) ; $self->smartReadExact(\$buffer, 4) or die "xxx" ; if ( unpack("V", $buffer) == ZIP64_END_CENTRAL_REC_HDR_SIG ) { $self->smartReadExact(\$buffer, 8) or die "xxx" ; my $size = U64::Value_VV64($buffer); $self->smartReadExact(\$buffer, $size) or die "xxx" ; my $cd64 = U64::Value_VV64 substr($buffer, 36, 8); return $cd64 ; } die "zzz"; } die "zzz"; } use constant Pack_ZIP_END_CENTRAL_HDR_SIG => pack("V", ZIP_END_CENTRAL_HDR_SIG); sub findCentralDirectoryOffset { my $self = shift ; # Most common use-case is where there is no comment, so # know exactly where the end of central directory record # should be. $self->smartSeek(-22, 0, SEEK_END) ; my $here = $self->tell(); my $buffer; $self->smartReadExact(\$buffer, 22) or die "xxx" ; my $zip64 = 0; my $centralDirOffset ; if ( unpack("V", $buffer) == ZIP_END_CENTRAL_HDR_SIG ) { $centralDirOffset = unpack("V", substr($buffer, 16, 4)); } else { $self->smartSeek(0, 0, SEEK_END) ; my $fileLen = $self->tell(); my $want = 0 ; while(1) { $want += 1024; my $seekTo = $fileLen - $want; if ($seekTo < 0 ) { $seekTo = 0; $want = $fileLen ; } $self->smartSeek( $seekTo, 0, SEEK_SET) or die "xxx $!" ; my $got; $self->smartReadExact($buffer, $want) or die "xxx " ; my $pos = rindex( $buffer, Pack_ZIP_END_CENTRAL_HDR_SIG); if ($pos >= 0) { #$here = $self->tell(); $here = $seekTo + $pos ; $centralDirOffset = unpack("V", substr($buffer, $pos + 16, 4)); last ; } return undef if $want == $fileLen; } } $centralDirOffset = $self->offsetFromZip64($here) if U64::full32 $centralDirOffset ; return $centralDirOffset ; } 1; __END__ =head1 NAME IO::Uncompress::Unzip - Read zip files/buffers =head1 SYNOPSIS use IO::Uncompress::Unzip qw(unzip $UnzipError) ; my $status = unzip $input => $output [,OPTS] or die "unzip failed: $UnzipError\n"; my $z = IO::Uncompress::Unzip->new( $input [OPTS] ) or die "unzip failed: $UnzipError\n"; $status = $z->read($buffer) $status = $z->read($buffer, $length) $status = $z->read($buffer, $length, $offset) $line = $z->getline() $char = $z->getc() $char = $z->ungetc() $char = $z->opened() $status = $z->inflateSync() $data = $z->trailingData() $status = $z->nextStream() $data = $z->getHeaderInfo() $z->tell() $z->seek($position, $whence) $z->binmode() $z->fileno() $z->eof() $z->close() $UnzipError ; # IO::File mode <$z> read($z, $buffer); read($z, $buffer, $length); read($z, $buffer, $length, $offset); tell($z) seek($z, $position, $whence) binmode($z) fileno($z) eof($z) close($z) =head1 DESCRIPTION This module provides a Perl interface that allows the reading of zlib files/buffers. For writing zip files/buffers, see the companion module IO::Compress::Zip. The primary purpose of this module is to provide I<streaming> read access to zip files and buffers. At present the following compression methods are supported by IO::Uncompress::Unzip =over 5 =item Store (0) =item Deflate (8) =item Bzip2 (12) To read Bzip2 content, the module C<IO::Uncompress::Bunzip2> must be installed. =item Lzma (14) To read LZMA content, the module C<IO::Uncompress::UnLzma> must be installed. =item Xz (95) To read Xz content, the module C<IO::Uncompress::UnXz> must be installed. =item Zstandard (93) To read Zstandard content, the module C<IO::Uncompress::UnZstd> must be installed. =back =head1 Functional Interface A top-level function, C<unzip>, is provided to carry out "one-shot" uncompression between buffers and/or files. For finer control over the uncompression process, see the L</"OO Interface"> section. use IO::Uncompress::Unzip qw(unzip $UnzipError) ; unzip $input_filename_or_reference => $output_filename_or_reference [,OPTS] or die "unzip failed: $UnzipError\n"; The functional interface needs Perl5.005 or better. =head2 unzip $input_filename_or_reference => $output_filename_or_reference [, OPTS] C<unzip> expects at least two parameters, C<$input_filename_or_reference> and C<$output_filename_or_reference> and zero or more optional parameters (see L</Optional Parameters>) =head3 The C<$input_filename_or_reference> parameter The parameter, C<$input_filename_or_reference>, is used to define the source of the compressed data. It can take one of the following forms: =over 5 =item A filename If the C<$input_filename_or_reference> parameter is a simple scalar, it is assumed to be a filename. This file will be opened for reading and the input data will be read from it. =item A filehandle If the C<$input_filename_or_reference> parameter is a filehandle, the input data will be read from it. The string '-' can be used as an alias for standard input. =item A scalar reference If C<$input_filename_or_reference> is a scalar reference, the input data will be read from C<$$input_filename_or_reference>. =item An array reference If C<$input_filename_or_reference> is an array reference, each element in the array must be a filename. The input data will be read from each file in turn. The complete array will be walked to ensure that it only contains valid filenames before any data is uncompressed. =item An Input FileGlob string If C<$input_filename_or_reference> is a string that is delimited by the characters "<" and ">" C<unzip> will assume that it is an I<input fileglob string>. The input is the list of files that match the fileglob. See L<File::GlobMapper|File::GlobMapper> for more details. =back If the C<$input_filename_or_reference> parameter is any other type, C<undef> will be returned. =head3 The C<$output_filename_or_reference> parameter The parameter C<$output_filename_or_reference> is used to control the destination of the uncompressed data. This parameter can take one of these forms. =over 5 =item A filename If the C<$output_filename_or_reference> parameter is a simple scalar, it is assumed to be a filename. This file will be opened for writing and the uncompressed data will be written to it. =item A filehandle If the C<$output_filename_or_reference> parameter is a filehandle, the uncompressed data will be written to it. The string '-' can be used as an alias for standard output. =item A scalar reference If C<$output_filename_or_reference> is a scalar reference, the uncompressed data will be stored in C<$$output_filename_or_reference>. =item An Array Reference If C<$output_filename_or_reference> is an array reference, the uncompressed data will be pushed onto the array. =item An Output FileGlob If C<$output_filename_or_reference> is a string that is delimited by the characters "<" and ">" C<unzip> will assume that it is an I<output fileglob string>. The output is the list of files that match the fileglob. When C<$output_filename_or_reference> is an fileglob string, C<$input_filename_or_reference> must also be a fileglob string. Anything else is an error. See L<File::GlobMapper|File::GlobMapper> for more details. =back If the C<$output_filename_or_reference> parameter is any other type, C<undef> will be returned. =head2 Notes When C<$input_filename_or_reference> maps to multiple compressed files/buffers and C<$output_filename_or_reference> is a single file/buffer, after uncompression C<$output_filename_or_reference> will contain a concatenation of all the uncompressed data from each of the input files/buffers. =head2 Optional Parameters The optional parameters for the one-shot function C<unzip> are (for the most part) identical to those used with the OO interface defined in the L</"Constructor Options"> section. The exceptions are listed below =over 5 =item C<< AutoClose => 0|1 >> This option applies to any input or output data streams to C<unzip> that are filehandles. If C<AutoClose> is specified, and the value is true, it will result in all input and/or output filehandles being closed once C<unzip> has completed. This parameter defaults to 0. =item C<< BinModeOut => 0|1 >> This option is now a no-op. All files will be written in binmode. =item C<< Append => 0|1 >> The behaviour of this option is dependent on the type of output data stream. =over 5 =item * A Buffer If C<Append> is enabled, all uncompressed data will be append to the end of the output buffer. Otherwise the output buffer will be cleared before any uncompressed data is written to it. =item * A Filename If C<Append> is enabled, the file will be opened in append mode. Otherwise the contents of the file, if any, will be truncated before any uncompressed data is written to it. =item * A Filehandle If C<Append> is enabled, the filehandle will be positioned to the end of the file via a call to C<seek> before any uncompressed data is written to it. Otherwise the file pointer will not be moved. =back When C<Append> is specified, and set to true, it will I<append> all uncompressed data to the output data stream. So when the output is a filehandle it will carry out a seek to the eof before writing any uncompressed data. If the output is a filename, it will be opened for appending. If the output is a buffer, all uncompressed data will be appended to the existing buffer. Conversely when C<Append> is not specified, or it is present and is set to false, it will operate as follows. When the output is a filename, it will truncate the contents of the file before writing any uncompressed data. If the output is a filehandle its position will not be changed. If the output is a buffer, it will be wiped before any uncompressed data is output. Defaults to 0. =item C<< MultiStream => 0|1 >> If the input file/buffer contains multiple compressed data streams, this option will uncompress the whole lot as a single data stream. Defaults to 0. =item C<< TrailingData => $scalar >> Returns the data, if any, that is present immediately after the compressed data stream once uncompression is complete. This option can be used when there is useful information immediately following the compressed data stream, and you don't know the length of the compressed data stream. If the input is a buffer, C<trailingData> will return everything from the end of the compressed data stream to the end of the buffer. If the input is a filehandle, C<trailingData> will return the data that is left in the filehandle input buffer once the end of the compressed data stream has been reached. You can then use the filehandle to read the rest of the input file. Don't bother using C<trailingData> if the input is a filename. If you know the length of the compressed data stream before you start uncompressing, you can avoid having to use C<trailingData> by setting the C<InputLength> option. =back =head2 Examples Say you have a zip file, C<file1.zip>, that only contains a single member, you can read it and write the uncompressed data to the file C<file1.txt> like this. use strict ; use warnings ; use IO::Uncompress::Unzip qw(unzip $UnzipError) ; my $input = "file1.zip"; my $output = "file1.txt"; unzip $input => $output or die "unzip failed: $UnzipError\n"; If you have a zip file that contains multiple members and want to read a specific member from the file, say C<"data1">, use the C<Name> option use strict ; use warnings ; use IO::Uncompress::Unzip qw(unzip $UnzipError) ; my $input = "file1.zip"; my $output = "file1.txt"; unzip $input => $output, Name => "data1" or die "unzip failed: $UnzipError\n"; Alternatively, if you want to read the C<"data1"> member into memory, use a scalar reference for the C<output> parameter. use strict ; use warnings ; use IO::Uncompress::Unzip qw(unzip $UnzipError) ; my $input = "file1.zip"; my $output ; unzip $input => \$output, Name => "data1" or die "unzip failed: $UnzipError\n"; # $output now contains the uncompressed data To read from an existing Perl filehandle, C<$input>, and write the uncompressed data to a buffer, C<$buffer>. use strict ; use warnings ; use IO::Uncompress::Unzip qw(unzip $UnzipError) ; use IO::File ; my $input = IO::File->new( "<file1.zip" ) or die "Cannot open 'file1.zip': $!\n" ; my $buffer ; unzip $input => \$buffer or die "unzip failed: $UnzipError\n"; =head1 OO Interface =head2 Constructor The format of the constructor for IO::Uncompress::Unzip is shown below my $z = IO::Uncompress::Unzip->new( $input [OPTS] ) or die "IO::Uncompress::Unzip failed: $UnzipError\n"; Returns an C<IO::Uncompress::Unzip> object on success and undef on failure. The variable C<$UnzipError> will contain an error message on failure. If you are running Perl 5.005 or better the object, C<$z>, returned from IO::Uncompress::Unzip can be used exactly like an L<IO::File|IO::File> filehandle. This means that all normal input file operations can be carried out with C<$z>. For example, to read a line from a compressed file/buffer you can use either of these forms $line = $z->getline(); $line = <$z>; The mandatory parameter C<$input> is used to determine the source of the compressed data. This parameter can take one of three forms. =over 5 =item A filename If the C<$input> parameter is a scalar, it is assumed to be a filename. This file will be opened for reading and the compressed data will be read from it. =item A filehandle If the C<$input> parameter is a filehandle, the compressed data will be read from it. The string '-' can be used as an alias for standard input. =item A scalar reference If C<$input> is a scalar reference, the compressed data will be read from C<$$input>. =back =head2 Constructor Options The option names defined below are case insensitive and can be optionally prefixed by a '-'. So all of the following are valid -AutoClose -autoclose AUTOCLOSE autoclose OPTS is a combination of the following options: =over 5 =item C<< Name => "membername" >> Open "membername" from the zip file for reading. =item C<< Efs => 0| 1 >> When this option is set to true AND the zip archive being read has the "Language Encoding Flag" (EFS) set, the member name is assumed to be encoded in UTF-8. If the member name in the zip archive is not valid UTF-8 when this optionn is true, the script will die with an error message. Note that this option only works with Perl 5.8.4 or better. This option defaults to B<false>. =item C<< AutoClose => 0|1 >> This option is only valid when the C<$input> parameter is a filehandle. If specified, and the value is true, it will result in the file being closed once either the C<close> method is called or the IO::Uncompress::Unzip object is destroyed. This parameter defaults to 0. =item C<< MultiStream => 0|1 >> Treats the complete zip file/buffer as a single compressed data stream. When reading in multi-stream mode each member of the zip file/buffer will be uncompressed in turn until the end of the file/buffer is encountered. This parameter defaults to 0. =item C<< Prime => $string >> This option will uncompress the contents of C<$string> before processing the input file/buffer. This option can be useful when the compressed data is embedded in another file/data structure and it is not possible to work out where the compressed data begins without having to read the first few bytes. If this is the case, the uncompression can be I<primed> with these bytes using this option. =item C<< Transparent => 0|1 >> If this option is set and the input file/buffer is not compressed data, the module will allow reading of it anyway. In addition, if the input file/buffer does contain compressed data and there is non-compressed data immediately following it, setting this option will make this module treat the whole file/buffer as a single data stream. This option defaults to 1. =item C<< BlockSize => $num >> When reading the compressed input data, IO::Uncompress::Unzip will read it in blocks of C<$num> bytes. This option defaults to 4096. =item C<< InputLength => $size >> When present this option will limit the number of compressed bytes read from the input file/buffer to C<$size>. This option can be used in the situation where there is useful data directly after the compressed data stream and you know beforehand the exact length of the compressed data stream. This option is mostly used when reading from a filehandle, in which case the file pointer will be left pointing to the first byte directly after the compressed data stream. This option defaults to off. =item C<< Append => 0|1 >> This option controls what the C<read> method does with uncompressed data. If set to 1, all uncompressed data will be appended to the output parameter of the C<read> method. If set to 0, the contents of the output parameter of the C<read> method will be overwritten by the uncompressed data. Defaults to 0. =item C<< Strict => 0|1 >> This option controls whether the extra checks defined below are used when carrying out the decompression. When Strict is on, the extra tests are carried out, when Strict is off they are not. The default for this option is off. =back =head2 Examples TODO =head1 Methods =head2 read Usage is $status = $z->read($buffer) Reads a block of compressed data (the size of the compressed block is determined by the C<Buffer> option in the constructor), uncompresses it and writes any uncompressed data into C<$buffer>. If the C<Append> parameter is set in the constructor, the uncompressed data will be appended to the C<$buffer> parameter. Otherwise C<$buffer> will be overwritten. Returns the number of uncompressed bytes written to C<$buffer>, zero if eof or a negative number on error. =head2 read Usage is $status = $z->read($buffer, $length) $status = $z->read($buffer, $length, $offset) $status = read($z, $buffer, $length) $status = read($z, $buffer, $length, $offset) Attempt to read C<$length> bytes of uncompressed data into C<$buffer>. The main difference between this form of the C<read> method and the previous one, is that this one will attempt to return I<exactly> C<$length> bytes. The only circumstances that this function will not is if end-of-file or an IO error is encountered. Returns the number of uncompressed bytes written to C<$buffer>, zero if eof or a negative number on error. =head2 getline Usage is $line = $z->getline() $line = <$z> Reads a single line. This method fully supports the use of the variable C<$/> (or C<$INPUT_RECORD_SEPARATOR> or C<$RS> when C<English> is in use) to determine what constitutes an end of line. Paragraph mode, record mode and file slurp mode are all supported. =head2 getc Usage is $char = $z->getc() Read a single character. =head2 ungetc Usage is $char = $z->ungetc($string) =head2 inflateSync Usage is $status = $z->inflateSync() TODO =head2 getHeaderInfo Usage is $hdr = $z->getHeaderInfo(); @hdrs = $z->getHeaderInfo(); This method returns either a hash reference (in scalar context) or a list or hash references (in array context) that contains information about each of the header fields in the compressed data stream(s). =head2 tell Usage is $z->tell() tell $z Returns the uncompressed file offset. =head2 eof Usage is $z->eof(); eof($z); Returns true if the end of the compressed input stream has been reached. =head2 seek $z->seek($position, $whence); seek($z, $position, $whence); Provides a sub-set of the C<seek> functionality, with the restriction that it is only legal to seek forward in the input file/buffer. It is a fatal error to attempt to seek backward. Note that the implementation of C<seek> in this module does not provide true random access to a compressed file/buffer. It works by uncompressing data from the current offset in the file/buffer until it reaches the uncompressed offset specified in the parameters to C<seek>. For very small files this may be acceptable behaviour. For large files it may cause an unacceptable delay. The C<$whence> parameter takes one the usual values, namely SEEK_SET, SEEK_CUR or SEEK_END. Returns 1 on success, 0 on failure. =head2 binmode Usage is $z->binmode binmode $z ; This is a noop provided for completeness. =head2 opened $z->opened() Returns true if the object currently refers to a opened file/buffer. =head2 autoflush my $prev = $z->autoflush() my $prev = $z->autoflush(EXPR) If the C<$z> object is associated with a file or a filehandle, this method returns the current autoflush setting for the underlying filehandle. If C<EXPR> is present, and is non-zero, it will enable flushing after every write/print operation. If C<$z> is associated with a buffer, this method has no effect and always returns C<undef>. B<Note> that the special variable C<$|> B<cannot> be used to set or retrieve the autoflush setting. =head2 input_line_number $z->input_line_number() $z->input_line_number(EXPR) Returns the current uncompressed line number. If C<EXPR> is present it has the effect of setting the line number. Note that setting the line number does not change the current position within the file/buffer being read. The contents of C<$/> are used to determine what constitutes a line terminator. =head2 fileno $z->fileno() fileno($z) If the C<$z> object is associated with a file or a filehandle, C<fileno> will return the underlying file descriptor. Once the C<close> method is called C<fileno> will return C<undef>. If the C<$z> object is associated with a buffer, this method will return C<undef>. =head2 close $z->close() ; close $z ; Closes the output file/buffer. For most versions of Perl this method will be automatically invoked if the IO::Uncompress::Unzip object is destroyed (either explicitly or by the variable with the reference to the object going out of scope). The exceptions are Perl versions 5.005 through 5.00504 and 5.8.0. In these cases, the C<close> method will be called automatically, but not until global destruction of all live objects when the program is terminating. Therefore, if you want your scripts to be able to run on all versions of Perl, you should call C<close> explicitly and not rely on automatic closing. Returns true on success, otherwise 0. If the C<AutoClose> option has been enabled when the IO::Uncompress::Unzip object was created, and the object is associated with a file, the underlying file will also be closed. =head2 nextStream Usage is my $status = $z->nextStream(); Skips to the next compressed data stream in the input file/buffer. If a new compressed data stream is found, the eof marker will be cleared and C<$.> will be reset to 0. If trailing data is present immediately after the zip archive and the C<Transparent> option is enabled, this method will consider that trailing data to be another member of the zip archive. Returns 1 if a new stream was found, 0 if none was found, and -1 if an error was encountered. =head2 trailingData Usage is my $data = $z->trailingData(); Returns the data, if any, that is present immediately after the compressed data stream once uncompression is complete. It only makes sense to call this method once the end of the compressed data stream has been encountered. This option can be used when there is useful information immediately following the compressed data stream, and you don't know the length of the compressed data stream. If the input is a buffer, C<trailingData> will return everything from the end of the compressed data stream to the end of the buffer. If the input is a filehandle, C<trailingData> will return the data that is left in the filehandle input buffer once the end of the compressed data stream has been reached. You can then use the filehandle to read the rest of the input file. Don't bother using C<trailingData> if the input is a filename. If you know the length of the compressed data stream before you start uncompressing, you can avoid having to use C<trailingData> by setting the C<InputLength> option in the constructor. =head1 Importing No symbolic constants are required by IO::Uncompress::Unzip at present. =over 5 =item :all Imports C<unzip> and C<$UnzipError>. Same as doing this use IO::Uncompress::Unzip qw(unzip $UnzipError) ; =back =head1 EXAMPLES =head2 Working with Net::FTP See L<IO::Compress::FAQ|IO::Compress::FAQ/"Compressed files and Net::FTP"> =head2 Walking through a zip file The code below can be used to traverse a zip file, one compressed data stream at a time. use IO::Uncompress::Unzip qw($UnzipError); my $zipfile = "somefile.zip"; my $u = IO::Uncompress::Unzip->new( $zipfile ) or die "Cannot open $zipfile: $UnzipError"; my $status; for ($status = 1; $status > 0; $status = $u->nextStream()) { my $name = $u->getHeaderInfo()->{Name}; warn "Processing member $name\n" ; my $buff; while (($status = $u->read($buff)) > 0) { # Do something here } last if $status < 0; } die "Error processing $zipfile: $!\n" if $status < 0 ; Each individual compressed data stream is read until the logical end-of-file is reached. Then C<nextStream> is called. This will skip to the start of the next compressed data stream and clear the end-of-file flag. It is also worth noting that C<nextStream> can be called at any time -- you don't have to wait until you have exhausted a compressed data stream before skipping to the next one. =head2 Unzipping a complete zip file to disk Daniel S. Sterling has written a script that uses C<IO::Uncompress::UnZip> to read a zip file and unzip its contents to disk. The script is available from L<https://gist.github.com/eqhmcow/5389877> =head1 SUPPORT General feedback/questions/bug reports should be sent to L<https://github.com/pmqs/IO-Compress/issues> (preferred) or L<https://rt.cpan.org/Public/Dist/Display.html?Name=IO-Compress>. =head1 SEE ALSO 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::Lzma>, L<IO::Uncompress::UnLzma>, L<IO::Compress::Xz>, L<IO::Uncompress::UnXz>, L<IO::Compress::Lzip>, L<IO::Uncompress::UnLzip>, L<IO::Compress::Lzop>, L<IO::Uncompress::UnLzop>, L<IO::Compress::Lzf>, L<IO::Uncompress::UnLzf>, L<IO::Compress::Zstd>, L<IO::Uncompress::UnZstd>, L<IO::Uncompress::AnyInflate>, L<IO::Uncompress::AnyUncompress> L<IO::Compress::FAQ|IO::Compress::FAQ> L<File::GlobMapper|File::GlobMapper>, L<Archive::Zip|Archive::Zip>, L<Archive::Tar|Archive::Tar>, L<IO::Zlib|IO::Zlib> For RFC 1950, 1951 and 1952 see L<http://www.faqs.org/rfcs/rfc1950.html>, L<http://www.faqs.org/rfcs/rfc1951.html> and L<http://www.faqs.org/rfcs/rfc1952.html> The I<zlib> compression library was written by Jean-loup Gailly C<gzip@prep.ai.mit.edu> and Mark Adler C<madler@alumni.caltech.edu>. The primary site for the I<zlib> compression library is L<http://www.zlib.org>. The primary site for gzip is L<http://www.gzip.org>. =head1 AUTHOR This module was written by Paul Marquess, C<pmqs@cpan.org>. =head1 MODIFICATION HISTORY See the Changes file. =head1 COPYRIGHT AND LICENSE Copyright (c) 2005-2021 Paul Marquess. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. PK ٚ!\� C�} �} Gunzip.pmnu �[��� package IO::Uncompress::Gunzip ; require 5.006 ; # for RFC1952 use strict ; use warnings; use bytes; use IO::Uncompress::RawInflate 2.101 ; use Compress::Raw::Zlib 2.101 () ; use IO::Compress::Base::Common 2.101 qw(:Status ); use IO::Compress::Gzip::Constants 2.101 ; use IO::Compress::Zlib::Extra 2.101 ; require Exporter ; our ($VERSION, @ISA, @EXPORT_OK, %EXPORT_TAGS, $GunzipError); @ISA = qw(IO::Uncompress::RawInflate Exporter); @EXPORT_OK = qw( $GunzipError gunzip ); %EXPORT_TAGS = %IO::Uncompress::RawInflate::DEFLATE_CONSTANTS ; push @{ $EXPORT_TAGS{all} }, @EXPORT_OK ; Exporter::export_ok_tags('all'); $GunzipError = ''; $VERSION = '2.102'; sub new { my $class = shift ; $GunzipError = ''; my $obj = IO::Compress::Base::Common::createSelfTiedObject($class, \$GunzipError); $obj->_create(undef, 0, @_); } sub gunzip { my $obj = IO::Compress::Base::Common::createSelfTiedObject(undef, \$GunzipError); return $obj->_inf(@_) ; } sub getExtraParams { return ( 'parseextra' => [IO::Compress::Base::Common::Parse_boolean, 0] ) ; } sub ckParams { my $self = shift ; my $got = shift ; # gunzip always needs crc32 $got->setValue('crc32' => 1); return 1; } sub ckMagic { my $self = shift; my $magic ; $self->smartReadExact(\$magic, GZIP_ID_SIZE); *$self->{HeaderPending} = $magic ; return $self->HeaderError("Minimum header size is " . GZIP_MIN_HEADER_SIZE . " bytes") if length $magic != GZIP_ID_SIZE ; return $self->HeaderError("Bad Magic") if ! isGzipMagic($magic) ; *$self->{Type} = 'rfc1952'; return $magic ; } sub readHeader { my $self = shift; my $magic = shift; return $self->_readGzipHeader($magic); } sub chkTrailer { my $self = shift; my $trailer = shift; # Check CRC & ISIZE my ($CRC32, $ISIZE) = unpack("V V", $trailer) ; *$self->{Info}{CRC32} = $CRC32; *$self->{Info}{ISIZE} = $ISIZE; if (*$self->{Strict}) { return $self->TrailerError("CRC mismatch") if $CRC32 != *$self->{Uncomp}->crc32() ; my $exp_isize = *$self->{UnCompSize}->get32bit(); return $self->TrailerError("ISIZE mismatch. Got $ISIZE" . ", expected $exp_isize") if $ISIZE != $exp_isize ; } return STATUS_OK; } sub isGzipMagic { my $buffer = shift ; return 0 if length $buffer < GZIP_ID_SIZE ; my ($id1, $id2) = unpack("C C", $buffer) ; return $id1 == GZIP_ID1 && $id2 == GZIP_ID2 ; } sub _readFullGzipHeader($) { my ($self) = @_ ; my $magic = '' ; $self->smartReadExact(\$magic, GZIP_ID_SIZE); *$self->{HeaderPending} = $magic ; return $self->HeaderError("Minimum header size is " . GZIP_MIN_HEADER_SIZE . " bytes") if length $magic != GZIP_ID_SIZE ; return $self->HeaderError("Bad Magic") if ! isGzipMagic($magic) ; my $status = $self->_readGzipHeader($magic); delete *$self->{Transparent} if ! defined $status ; return $status ; } sub _readGzipHeader($) { my ($self, $magic) = @_ ; my ($HeaderCRC) ; my ($buffer) = '' ; $self->smartReadExact(\$buffer, GZIP_MIN_HEADER_SIZE - GZIP_ID_SIZE) or return $self->HeaderError("Minimum header size is " . GZIP_MIN_HEADER_SIZE . " bytes") ; my $keep = $magic . $buffer ; *$self->{HeaderPending} = $keep ; # now split out the various parts my ($cm, $flag, $mtime, $xfl, $os) = unpack("C C V C C", $buffer) ; $cm == GZIP_CM_DEFLATED or return $self->HeaderError("Not Deflate (CM is $cm)") ; # check for use of reserved bits return $self->HeaderError("Use of Reserved Bits in FLG field.") if $flag & GZIP_FLG_RESERVED ; my $EXTRA ; my @EXTRA = () ; if ($flag & GZIP_FLG_FEXTRA) { $EXTRA = "" ; $self->smartReadExact(\$buffer, GZIP_FEXTRA_HEADER_SIZE) or return $self->TruncatedHeader("FEXTRA Length") ; my ($XLEN) = unpack("v", $buffer) ; $self->smartReadExact(\$EXTRA, $XLEN) or return $self->TruncatedHeader("FEXTRA Body"); $keep .= $buffer . $EXTRA ; if ($XLEN && *$self->{'ParseExtra'}) { my $bad = IO::Compress::Zlib::Extra::parseRawExtra($EXTRA, \@EXTRA, 1, 1); return $self->HeaderError($bad) if defined $bad; } } my $origname ; if ($flag & GZIP_FLG_FNAME) { $origname = "" ; while (1) { $self->smartReadExact(\$buffer, 1) or return $self->TruncatedHeader("FNAME"); last if $buffer eq GZIP_NULL_BYTE ; $origname .= $buffer } $keep .= $origname . GZIP_NULL_BYTE ; return $self->HeaderError("Non ISO 8859-1 Character found in Name") if *$self->{Strict} && $origname =~ /$GZIP_FNAME_INVALID_CHAR_RE/o ; } my $comment ; if ($flag & GZIP_FLG_FCOMMENT) { $comment = ""; while (1) { $self->smartReadExact(\$buffer, 1) or return $self->TruncatedHeader("FCOMMENT"); last if $buffer eq GZIP_NULL_BYTE ; $comment .= $buffer } $keep .= $comment . GZIP_NULL_BYTE ; return $self->HeaderError("Non ISO 8859-1 Character found in Comment") if *$self->{Strict} && $comment =~ /$GZIP_FCOMMENT_INVALID_CHAR_RE/o ; } if ($flag & GZIP_FLG_FHCRC) { $self->smartReadExact(\$buffer, GZIP_FHCRC_SIZE) or return $self->TruncatedHeader("FHCRC"); $HeaderCRC = unpack("v", $buffer) ; my $crc16 = Compress::Raw::Zlib::crc32($keep) & 0xFF ; return $self->HeaderError("CRC16 mismatch.") if *$self->{Strict} && $crc16 != $HeaderCRC; $keep .= $buffer ; } # Assume compression method is deflated for xfl tests #if ($xfl) { #} *$self->{Type} = 'rfc1952'; return { 'Type' => 'rfc1952', 'FingerprintLength' => 2, 'HeaderLength' => length $keep, 'TrailerLength' => GZIP_TRAILER_SIZE, 'Header' => $keep, 'isMinimalHeader' => $keep eq GZIP_MINIMUM_HEADER ? 1 : 0, 'MethodID' => $cm, 'MethodName' => $cm == GZIP_CM_DEFLATED ? "Deflated" : "Unknown" , 'TextFlag' => $flag & GZIP_FLG_FTEXT ? 1 : 0, 'HeaderCRCFlag' => $flag & GZIP_FLG_FHCRC ? 1 : 0, 'NameFlag' => $flag & GZIP_FLG_FNAME ? 1 : 0, 'CommentFlag' => $flag & GZIP_FLG_FCOMMENT ? 1 : 0, 'ExtraFlag' => $flag & GZIP_FLG_FEXTRA ? 1 : 0, 'Name' => $origname, 'Comment' => $comment, 'Time' => $mtime, 'OsID' => $os, 'OsName' => defined $GZIP_OS_Names{$os} ? $GZIP_OS_Names{$os} : "Unknown", 'HeaderCRC' => $HeaderCRC, 'Flags' => $flag, 'ExtraFlags' => $xfl, 'ExtraFieldRaw' => $EXTRA, 'ExtraField' => [ @EXTRA ], #'CompSize'=> $compsize, #'CRC32'=> $CRC32, #'OrigSize'=> $ISIZE, } } 1; __END__ =head1 NAME IO::Uncompress::Gunzip - Read RFC 1952 files/buffers =head1 SYNOPSIS use IO::Uncompress::Gunzip qw(gunzip $GunzipError) ; my $status = gunzip $input => $output [,OPTS] or die "gunzip failed: $GunzipError\n"; my $z = IO::Uncompress::Gunzip->new( $input [OPTS] ) or die "gunzip failed: $GunzipError\n"; $status = $z->read($buffer) $status = $z->read($buffer, $length) $status = $z->read($buffer, $length, $offset) $line = $z->getline() $char = $z->getc() $char = $z->ungetc() $char = $z->opened() $status = $z->inflateSync() $data = $z->trailingData() $status = $z->nextStream() $data = $z->getHeaderInfo() $z->tell() $z->seek($position, $whence) $z->binmode() $z->fileno() $z->eof() $z->close() $GunzipError ; # IO::File mode <$z> read($z, $buffer); read($z, $buffer, $length); read($z, $buffer, $length, $offset); tell($z) seek($z, $position, $whence) binmode($z) fileno($z) eof($z) close($z) =head1 DESCRIPTION This module provides a Perl interface that allows the reading of files/buffers that conform to RFC 1952. For writing RFC 1952 files/buffers, see the companion module IO::Compress::Gzip. =head1 Functional Interface A top-level function, C<gunzip>, is provided to carry out "one-shot" uncompression between buffers and/or files. For finer control over the uncompression process, see the L</"OO Interface"> section. use IO::Uncompress::Gunzip qw(gunzip $GunzipError) ; gunzip $input_filename_or_reference => $output_filename_or_reference [,OPTS] or die "gunzip failed: $GunzipError\n"; The functional interface needs Perl5.005 or better. =head2 gunzip $input_filename_or_reference => $output_filename_or_reference [, OPTS] C<gunzip> expects at least two parameters, C<$input_filename_or_reference> and C<$output_filename_or_reference> and zero or more optional parameters (see L</Optional Parameters>) =head3 The C<$input_filename_or_reference> parameter The parameter, C<$input_filename_or_reference>, is used to define the source of the compressed data. It can take one of the following forms: =over 5 =item A filename If the C<$input_filename_or_reference> parameter is a simple scalar, it is assumed to be a filename. This file will be opened for reading and the input data will be read from it. =item A filehandle If the C<$input_filename_or_reference> parameter is a filehandle, the input data will be read from it. The string '-' can be used as an alias for standard input. =item A scalar reference If C<$input_filename_or_reference> is a scalar reference, the input data will be read from C<$$input_filename_or_reference>. =item An array reference If C<$input_filename_or_reference> is an array reference, each element in the array must be a filename. The input data will be read from each file in turn. The complete array will be walked to ensure that it only contains valid filenames before any data is uncompressed. =item An Input FileGlob string If C<$input_filename_or_reference> is a string that is delimited by the characters "<" and ">" C<gunzip> will assume that it is an I<input fileglob string>. The input is the list of files that match the fileglob. See L<File::GlobMapper|File::GlobMapper> for more details. =back If the C<$input_filename_or_reference> parameter is any other type, C<undef> will be returned. =head3 The C<$output_filename_or_reference> parameter The parameter C<$output_filename_or_reference> is used to control the destination of the uncompressed data. This parameter can take one of these forms. =over 5 =item A filename If the C<$output_filename_or_reference> parameter is a simple scalar, it is assumed to be a filename. This file will be opened for writing and the uncompressed data will be written to it. =item A filehandle If the C<$output_filename_or_reference> parameter is a filehandle, the uncompressed data will be written to it. The string '-' can be used as an alias for standard output. =item A scalar reference If C<$output_filename_or_reference> is a scalar reference, the uncompressed data will be stored in C<$$output_filename_or_reference>. =item An Array Reference If C<$output_filename_or_reference> is an array reference, the uncompressed data will be pushed onto the array. =item An Output FileGlob If C<$output_filename_or_reference> is a string that is delimited by the characters "<" and ">" C<gunzip> will assume that it is an I<output fileglob string>. The output is the list of files that match the fileglob. When C<$output_filename_or_reference> is an fileglob string, C<$input_filename_or_reference> must also be a fileglob string. Anything else is an error. See L<File::GlobMapper|File::GlobMapper> for more details. =back If the C<$output_filename_or_reference> parameter is any other type, C<undef> will be returned. =head2 Notes When C<$input_filename_or_reference> maps to multiple compressed files/buffers and C<$output_filename_or_reference> is a single file/buffer, after uncompression C<$output_filename_or_reference> will contain a concatenation of all the uncompressed data from each of the input files/buffers. =head2 Optional Parameters The optional parameters for the one-shot function C<gunzip> are (for the most part) identical to those used with the OO interface defined in the L</"Constructor Options"> section. The exceptions are listed below =over 5 =item C<< AutoClose => 0|1 >> This option applies to any input or output data streams to C<gunzip> that are filehandles. If C<AutoClose> is specified, and the value is true, it will result in all input and/or output filehandles being closed once C<gunzip> has completed. This parameter defaults to 0. =item C<< BinModeOut => 0|1 >> This option is now a no-op. All files will be written in binmode. =item C<< Append => 0|1 >> The behaviour of this option is dependent on the type of output data stream. =over 5 =item * A Buffer If C<Append> is enabled, all uncompressed data will be append to the end of the output buffer. Otherwise the output buffer will be cleared before any uncompressed data is written to it. =item * A Filename If C<Append> is enabled, the file will be opened in append mode. Otherwise the contents of the file, if any, will be truncated before any uncompressed data is written to it. =item * A Filehandle If C<Append> is enabled, the filehandle will be positioned to the end of the file via a call to C<seek> before any uncompressed data is written to it. Otherwise the file pointer will not be moved. =back When C<Append> is specified, and set to true, it will I<append> all uncompressed data to the output data stream. So when the output is a filehandle it will carry out a seek to the eof before writing any uncompressed data. If the output is a filename, it will be opened for appending. If the output is a buffer, all uncompressed data will be appended to the existing buffer. Conversely when C<Append> is not specified, or it is present and is set to false, it will operate as follows. When the output is a filename, it will truncate the contents of the file before writing any uncompressed data. If the output is a filehandle its position will not be changed. If the output is a buffer, it will be wiped before any uncompressed data is output. Defaults to 0. =item C<< MultiStream => 0|1 >> If the input file/buffer contains multiple compressed data streams, this option will uncompress the whole lot as a single data stream. Defaults to 0. =item C<< TrailingData => $scalar >> Returns the data, if any, that is present immediately after the compressed data stream once uncompression is complete. This option can be used when there is useful information immediately following the compressed data stream, and you don't know the length of the compressed data stream. If the input is a buffer, C<trailingData> will return everything from the end of the compressed data stream to the end of the buffer. If the input is a filehandle, C<trailingData> will return the data that is left in the filehandle input buffer once the end of the compressed data stream has been reached. You can then use the filehandle to read the rest of the input file. Don't bother using C<trailingData> if the input is a filename. If you know the length of the compressed data stream before you start uncompressing, you can avoid having to use C<trailingData> by setting the C<InputLength> option. =back =head2 Examples To read the contents of the file C<file1.txt.gz> and write the uncompressed data to the file C<file1.txt>. use strict ; use warnings ; use IO::Uncompress::Gunzip qw(gunzip $GunzipError) ; my $input = "file1.txt.gz"; my $output = "file1.txt"; gunzip $input => $output or die "gunzip failed: $GunzipError\n"; To read from an existing Perl filehandle, C<$input>, and write the uncompressed data to a buffer, C<$buffer>. use strict ; use warnings ; use IO::Uncompress::Gunzip qw(gunzip $GunzipError) ; use IO::File ; my $input = IO::File->new( "<file1.txt.gz" ) or die "Cannot open 'file1.txt.gz': $!\n" ; my $buffer ; gunzip $input => \$buffer or die "gunzip failed: $GunzipError\n"; To uncompress all files in the directory "/my/home" that match "*.txt.gz" and store the compressed data in the same directory use strict ; use warnings ; use IO::Uncompress::Gunzip qw(gunzip $GunzipError) ; gunzip '</my/home/*.txt.gz>' => '</my/home/#1.txt>' or die "gunzip failed: $GunzipError\n"; and if you want to compress each file one at a time, this will do the trick use strict ; use warnings ; use IO::Uncompress::Gunzip qw(gunzip $GunzipError) ; for my $input ( glob "/my/home/*.txt.gz" ) { my $output = $input; $output =~ s/.gz// ; gunzip $input => $output or die "Error compressing '$input': $GunzipError\n"; } =head1 OO Interface =head2 Constructor The format of the constructor for IO::Uncompress::Gunzip is shown below my $z = IO::Uncompress::Gunzip->new( $input [OPTS] ) or die "IO::Uncompress::Gunzip failed: $GunzipError\n"; Returns an C<IO::Uncompress::Gunzip> object on success and undef on failure. The variable C<$GunzipError> will contain an error message on failure. If you are running Perl 5.005 or better the object, C<$z>, returned from IO::Uncompress::Gunzip can be used exactly like an L<IO::File|IO::File> filehandle. This means that all normal input file operations can be carried out with C<$z>. For example, to read a line from a compressed file/buffer you can use either of these forms $line = $z->getline(); $line = <$z>; The mandatory parameter C<$input> is used to determine the source of the compressed data. This parameter can take one of three forms. =over 5 =item A filename If the C<$input> parameter is a scalar, it is assumed to be a filename. This file will be opened for reading and the compressed data will be read from it. =item A filehandle If the C<$input> parameter is a filehandle, the compressed data will be read from it. The string '-' can be used as an alias for standard input. =item A scalar reference If C<$input> is a scalar reference, the compressed data will be read from C<$$input>. =back =head2 Constructor Options The option names defined below are case insensitive and can be optionally prefixed by a '-'. So all of the following are valid -AutoClose -autoclose AUTOCLOSE autoclose OPTS is a combination of the following options: =over 5 =item C<< AutoClose => 0|1 >> This option is only valid when the C<$input> parameter is a filehandle. If specified, and the value is true, it will result in the file being closed once either the C<close> method is called or the IO::Uncompress::Gunzip object is destroyed. This parameter defaults to 0. =item C<< MultiStream => 0|1 >> Allows multiple concatenated compressed streams to be treated as a single compressed stream. Decompression will stop once either the end of the file/buffer is reached, an error is encountered (premature eof, corrupt compressed data) or the end of a stream is not immediately followed by the start of another stream. This parameter defaults to 0. =item C<< Prime => $string >> This option will uncompress the contents of C<$string> before processing the input file/buffer. This option can be useful when the compressed data is embedded in another file/data structure and it is not possible to work out where the compressed data begins without having to read the first few bytes. If this is the case, the uncompression can be I<primed> with these bytes using this option. =item C<< Transparent => 0|1 >> If this option is set and the input file/buffer is not compressed data, the module will allow reading of it anyway. In addition, if the input file/buffer does contain compressed data and there is non-compressed data immediately following it, setting this option will make this module treat the whole file/buffer as a single data stream. This option defaults to 1. =item C<< BlockSize => $num >> When reading the compressed input data, IO::Uncompress::Gunzip will read it in blocks of C<$num> bytes. This option defaults to 4096. =item C<< InputLength => $size >> When present this option will limit the number of compressed bytes read from the input file/buffer to C<$size>. This option can be used in the situation where there is useful data directly after the compressed data stream and you know beforehand the exact length of the compressed data stream. This option is mostly used when reading from a filehandle, in which case the file pointer will be left pointing to the first byte directly after the compressed data stream. This option defaults to off. =item C<< Append => 0|1 >> This option controls what the C<read> method does with uncompressed data. If set to 1, all uncompressed data will be appended to the output parameter of the C<read> method. If set to 0, the contents of the output parameter of the C<read> method will be overwritten by the uncompressed data. Defaults to 0. =item C<< Strict => 0|1 >> This option controls whether the extra checks defined below are used when carrying out the decompression. When Strict is on, the extra tests are carried out, when Strict is off they are not. The default for this option is off. =over 5 =item 1 If the FHCRC bit is set in the gzip FLG header byte, the CRC16 bytes in the header must match the crc16 value of the gzip header actually read. =item 2 If the gzip header contains a name field (FNAME) it consists solely of ISO 8859-1 characters. =item 3 If the gzip header contains a comment field (FCOMMENT) it consists solely of ISO 8859-1 characters plus line-feed. =item 4 If the gzip FEXTRA header field is present it must conform to the sub-field structure as defined in RFC 1952. =item 5 The CRC32 and ISIZE trailer fields must be present. =item 6 The value of the CRC32 field read must match the crc32 value of the uncompressed data actually contained in the gzip file. =item 7 The value of the ISIZE fields read must match the length of the uncompressed data actually read from the file. =back =item C<< ParseExtra => 0|1 >> If the gzip FEXTRA header field is present and this option is set, it will force the module to check that it conforms to the sub-field structure as defined in RFC 1952. If the C<Strict> is on it will automatically enable this option. Defaults to 0. =back =head2 Examples TODO =head1 Methods =head2 read Usage is $status = $z->read($buffer) Reads a block of compressed data (the size of the compressed block is determined by the C<Buffer> option in the constructor), uncompresses it and writes any uncompressed data into C<$buffer>. If the C<Append> parameter is set in the constructor, the uncompressed data will be appended to the C<$buffer> parameter. Otherwise C<$buffer> will be overwritten. Returns the number of uncompressed bytes written to C<$buffer>, zero if eof or a negative number on error. =head2 read Usage is $status = $z->read($buffer, $length) $status = $z->read($buffer, $length, $offset) $status = read($z, $buffer, $length) $status = read($z, $buffer, $length, $offset) Attempt to read C<$length> bytes of uncompressed data into C<$buffer>. The main difference between this form of the C<read> method and the previous one, is that this one will attempt to return I<exactly> C<$length> bytes. The only circumstances that this function will not is if end-of-file or an IO error is encountered. Returns the number of uncompressed bytes written to C<$buffer>, zero if eof or a negative number on error. =head2 getline Usage is $line = $z->getline() $line = <$z> Reads a single line. This method fully supports the use of the variable C<$/> (or C<$INPUT_RECORD_SEPARATOR> or C<$RS> when C<English> is in use) to determine what constitutes an end of line. Paragraph mode, record mode and file slurp mode are all supported. =head2 getc Usage is $char = $z->getc() Read a single character. =head2 ungetc Usage is $char = $z->ungetc($string) =head2 inflateSync Usage is $status = $z->inflateSync() TODO =head2 getHeaderInfo Usage is $hdr = $z->getHeaderInfo(); @hdrs = $z->getHeaderInfo(); This method returns either a hash reference (in scalar context) or a list or hash references (in array context) that contains information about each of the header fields in the compressed data stream(s). =over 5 =item Name The contents of the Name header field, if present. If no name is present, the value will be undef. Note this is different from a zero length name, which will return an empty string. =item Comment The contents of the Comment header field, if present. If no comment is present, the value will be undef. Note this is different from a zero length comment, which will return an empty string. =back =head2 tell Usage is $z->tell() tell $z Returns the uncompressed file offset. =head2 eof Usage is $z->eof(); eof($z); Returns true if the end of the compressed input stream has been reached. =head2 seek $z->seek($position, $whence); seek($z, $position, $whence); Provides a sub-set of the C<seek> functionality, with the restriction that it is only legal to seek forward in the input file/buffer. It is a fatal error to attempt to seek backward. Note that the implementation of C<seek> in this module does not provide true random access to a compressed file/buffer. It works by uncompressing data from the current offset in the file/buffer until it reaches the uncompressed offset specified in the parameters to C<seek>. For very small files this may be acceptable behaviour. For large files it may cause an unacceptable delay. The C<$whence> parameter takes one the usual values, namely SEEK_SET, SEEK_CUR or SEEK_END. Returns 1 on success, 0 on failure. =head2 binmode Usage is $z->binmode binmode $z ; This is a noop provided for completeness. =head2 opened $z->opened() Returns true if the object currently refers to a opened file/buffer. =head2 autoflush my $prev = $z->autoflush() my $prev = $z->autoflush(EXPR) If the C<$z> object is associated with a file or a filehandle, this method returns the current autoflush setting for the underlying filehandle. If C<EXPR> is present, and is non-zero, it will enable flushing after every write/print operation. If C<$z> is associated with a buffer, this method has no effect and always returns C<undef>. B<Note> that the special variable C<$|> B<cannot> be used to set or retrieve the autoflush setting. =head2 input_line_number $z->input_line_number() $z->input_line_number(EXPR) Returns the current uncompressed line number. If C<EXPR> is present it has the effect of setting the line number. Note that setting the line number does not change the current position within the file/buffer being read. The contents of C<$/> are used to determine what constitutes a line terminator. =head2 fileno $z->fileno() fileno($z) If the C<$z> object is associated with a file or a filehandle, C<fileno> will return the underlying file descriptor. Once the C<close> method is called C<fileno> will return C<undef>. If the C<$z> object is associated with a buffer, this method will return C<undef>. =head2 close $z->close() ; close $z ; Closes the output file/buffer. For most versions of Perl this method will be automatically invoked if the IO::Uncompress::Gunzip object is destroyed (either explicitly or by the variable with the reference to the object going out of scope). The exceptions are Perl versions 5.005 through 5.00504 and 5.8.0. In these cases, the C<close> method will be called automatically, but not until global destruction of all live objects when the program is terminating. Therefore, if you want your scripts to be able to run on all versions of Perl, you should call C<close> explicitly and not rely on automatic closing. Returns true on success, otherwise 0. If the C<AutoClose> option has been enabled when the IO::Uncompress::Gunzip object was created, and the object is associated with a file, the underlying file will also be closed. =head2 nextStream Usage is my $status = $z->nextStream(); Skips to the next compressed data stream in the input file/buffer. If a new compressed data stream is found, the eof marker will be cleared and C<$.> will be reset to 0. Returns 1 if a new stream was found, 0 if none was found, and -1 if an error was encountered. =head2 trailingData Usage is my $data = $z->trailingData(); Returns the data, if any, that is present immediately after the compressed data stream once uncompression is complete. It only makes sense to call this method once the end of the compressed data stream has been encountered. This option can be used when there is useful information immediately following the compressed data stream, and you don't know the length of the compressed data stream. If the input is a buffer, C<trailingData> will return everything from the end of the compressed data stream to the end of the buffer. If the input is a filehandle, C<trailingData> will return the data that is left in the filehandle input buffer once the end of the compressed data stream has been reached. You can then use the filehandle to read the rest of the input file. Don't bother using C<trailingData> if the input is a filename. If you know the length of the compressed data stream before you start uncompressing, you can avoid having to use C<trailingData> by setting the C<InputLength> option in the constructor. =head1 Importing No symbolic constants are required by IO::Uncompress::Gunzip at present. =over 5 =item :all Imports C<gunzip> and C<$GunzipError>. Same as doing this use IO::Uncompress::Gunzip qw(gunzip $GunzipError) ; =back =head1 EXAMPLES =head2 Working with Net::FTP See L<IO::Compress::FAQ|IO::Compress::FAQ/"Compressed files and Net::FTP"> =head1 SUPPORT General feedback/questions/bug reports should be sent to L<https://github.com/pmqs/IO-Compress/issues> (preferred) or L<https://rt.cpan.org/Public/Dist/Display.html?Name=IO-Compress>. =head1 SEE ALSO 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::Lzma>, L<IO::Uncompress::UnLzma>, L<IO::Compress::Xz>, L<IO::Uncompress::UnXz>, L<IO::Compress::Lzip>, L<IO::Uncompress::UnLzip>, L<IO::Compress::Lzop>, L<IO::Uncompress::UnLzop>, L<IO::Compress::Lzf>, L<IO::Uncompress::UnLzf>, L<IO::Compress::Zstd>, L<IO::Uncompress::UnZstd>, L<IO::Uncompress::AnyInflate>, L<IO::Uncompress::AnyUncompress> L<IO::Compress::FAQ|IO::Compress::FAQ> L<File::GlobMapper|File::GlobMapper>, L<Archive::Zip|Archive::Zip>, L<Archive::Tar|Archive::Tar>, L<IO::Zlib|IO::Zlib> For RFC 1950, 1951 and 1952 see L<http://www.faqs.org/rfcs/rfc1950.html>, L<http://www.faqs.org/rfcs/rfc1951.html> and L<http://www.faqs.org/rfcs/rfc1952.html> The I<zlib> compression library was written by Jean-loup Gailly C<gzip@prep.ai.mit.edu> and Mark Adler C<madler@alumni.caltech.edu>. The primary site for the I<zlib> compression library is L<http://www.zlib.org>. The primary site for gzip is L<http://www.gzip.org>. =head1 AUTHOR This module was written by Paul Marquess, C<pmqs@cpan.org>. =head1 MODIFICATION HISTORY See the Changes file. =head1 COPYRIGHT AND LICENSE Copyright (c) 2005-2021 Paul Marquess. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. PK ٚ!\/d jn jn AnyInflate.pmnu �[��� package IO::Uncompress::AnyInflate ; # for RFC1950, RFC1951 or RFC1952 use strict; use warnings; use bytes; use IO::Compress::Base::Common 2.101 qw(:Parse); use IO::Uncompress::Adapter::Inflate 2.101 (); use IO::Uncompress::Base 2.101 ; use IO::Uncompress::Gunzip 2.101 ; use IO::Uncompress::Inflate 2.101 ; use IO::Uncompress::RawInflate 2.101 ; use IO::Uncompress::Unzip 2.101 ; require Exporter ; our ($VERSION, @ISA, @EXPORT_OK, %EXPORT_TAGS, $AnyInflateError); $VERSION = '2.102'; $AnyInflateError = ''; @ISA = qw(IO::Uncompress::Base Exporter); @EXPORT_OK = qw( $AnyInflateError anyinflate ) ; %EXPORT_TAGS = %IO::Uncompress::Base::DEFLATE_CONSTANTS if keys %IO::Uncompress::Base::DEFLATE_CONSTANTS; push @{ $EXPORT_TAGS{all} }, @EXPORT_OK ; Exporter::export_ok_tags('all'); # TODO - allow the user to pick a set of the three formats to allow # or just assume want to auto-detect any of the three formats. sub new { my $class = shift ; my $obj = IO::Compress::Base::Common::createSelfTiedObject($class, \$AnyInflateError); $obj->_create(undef, 0, @_); } sub anyinflate { my $obj = IO::Compress::Base::Common::createSelfTiedObject(undef, \$AnyInflateError); return $obj->_inf(@_) ; } sub getExtraParams { return ( 'rawinflate' => [Parse_boolean, 0] ) ; } sub ckParams { my $self = shift ; my $got = shift ; # any always needs both crc32 and adler32 $got->setValue('crc32' => 1); $got->setValue('adler32' => 1); return 1; } sub mkUncomp { my $self = shift ; my $got = shift ; my ($obj, $errstr, $errno) = IO::Uncompress::Adapter::Inflate::mkUncompObject(); return $self->saveErrorString(undef, $errstr, $errno) if ! defined $obj; *$self->{Uncomp} = $obj; my @possible = qw( Inflate Gunzip Unzip ); unshift @possible, 'RawInflate' if 1 || $got->getValue('rawinflate'); my $magic = $self->ckMagic( @possible ); if ($magic) { *$self->{Info} = $self->readHeader($magic) or return undef ; return 1; } return 0 ; } sub ckMagic { my $self = shift; my @names = @_ ; my $keep = ref $self ; for my $class ( map { "IO::Uncompress::$_" } @names) { bless $self => $class; my $magic = $self->ckMagic(); if ($magic) { #bless $self => $class; return $magic ; } $self->pushBack(*$self->{HeaderPending}) ; *$self->{HeaderPending} = '' ; } bless $self => $keep; return undef; } 1 ; __END__ =head1 NAME IO::Uncompress::AnyInflate - Uncompress zlib-based (zip, gzip) file/buffer =head1 SYNOPSIS use IO::Uncompress::AnyInflate qw(anyinflate $AnyInflateError) ; my $status = anyinflate $input => $output [,OPTS] or die "anyinflate failed: $AnyInflateError\n"; my $z = IO::Uncompress::AnyInflate->new( $input [OPTS] ) or die "anyinflate failed: $AnyInflateError\n"; $status = $z->read($buffer) $status = $z->read($buffer, $length) $status = $z->read($buffer, $length, $offset) $line = $z->getline() $char = $z->getc() $char = $z->ungetc() $char = $z->opened() $status = $z->inflateSync() $data = $z->trailingData() $status = $z->nextStream() $data = $z->getHeaderInfo() $z->tell() $z->seek($position, $whence) $z->binmode() $z->fileno() $z->eof() $z->close() $AnyInflateError ; # IO::File mode <$z> read($z, $buffer); read($z, $buffer, $length); read($z, $buffer, $length, $offset); tell($z) seek($z, $position, $whence) binmode($z) fileno($z) eof($z) close($z) =head1 DESCRIPTION This module provides a Perl interface that allows the reading of files/buffers that have been compressed in a number of formats that use the zlib compression library. The formats supported are =over 5 =item RFC 1950 =item RFC 1951 (optionally) =item gzip (RFC 1952) =item zip =back The module will auto-detect which, if any, of the supported compression formats is being used. =head1 Functional Interface A top-level function, C<anyinflate>, is provided to carry out "one-shot" uncompression between buffers and/or files. For finer control over the uncompression process, see the L</"OO Interface"> section. use IO::Uncompress::AnyInflate qw(anyinflate $AnyInflateError) ; anyinflate $input_filename_or_reference => $output_filename_or_reference [,OPTS] or die "anyinflate failed: $AnyInflateError\n"; The functional interface needs Perl5.005 or better. =head2 anyinflate $input_filename_or_reference => $output_filename_or_reference [, OPTS] C<anyinflate> expects at least two parameters, C<$input_filename_or_reference> and C<$output_filename_or_reference> and zero or more optional parameters (see L</Optional Parameters>) =head3 The C<$input_filename_or_reference> parameter The parameter, C<$input_filename_or_reference>, is used to define the source of the compressed data. It can take one of the following forms: =over 5 =item A filename If the C<$input_filename_or_reference> parameter is a simple scalar, it is assumed to be a filename. This file will be opened for reading and the input data will be read from it. =item A filehandle If the C<$input_filename_or_reference> parameter is a filehandle, the input data will be read from it. The string '-' can be used as an alias for standard input. =item A scalar reference If C<$input_filename_or_reference> is a scalar reference, the input data will be read from C<$$input_filename_or_reference>. =item An array reference If C<$input_filename_or_reference> is an array reference, each element in the array must be a filename. The input data will be read from each file in turn. The complete array will be walked to ensure that it only contains valid filenames before any data is uncompressed. =item An Input FileGlob string If C<$input_filename_or_reference> is a string that is delimited by the characters "<" and ">" C<anyinflate> will assume that it is an I<input fileglob string>. The input is the list of files that match the fileglob. See L<File::GlobMapper|File::GlobMapper> for more details. =back If the C<$input_filename_or_reference> parameter is any other type, C<undef> will be returned. =head3 The C<$output_filename_or_reference> parameter The parameter C<$output_filename_or_reference> is used to control the destination of the uncompressed data. This parameter can take one of these forms. =over 5 =item A filename If the C<$output_filename_or_reference> parameter is a simple scalar, it is assumed to be a filename. This file will be opened for writing and the uncompressed data will be written to it. =item A filehandle If the C<$output_filename_or_reference> parameter is a filehandle, the uncompressed data will be written to it. The string '-' can be used as an alias for standard output. =item A scalar reference If C<$output_filename_or_reference> is a scalar reference, the uncompressed data will be stored in C<$$output_filename_or_reference>. =item An Array Reference If C<$output_filename_or_reference> is an array reference, the uncompressed data will be pushed onto the array. =item An Output FileGlob If C<$output_filename_or_reference> is a string that is delimited by the characters "<" and ">" C<anyinflate> will assume that it is an I<output fileglob string>. The output is the list of files that match the fileglob. When C<$output_filename_or_reference> is an fileglob string, C<$input_filename_or_reference> must also be a fileglob string. Anything else is an error. See L<File::GlobMapper|File::GlobMapper> for more details. =back If the C<$output_filename_or_reference> parameter is any other type, C<undef> will be returned. =head2 Notes When C<$input_filename_or_reference> maps to multiple compressed files/buffers and C<$output_filename_or_reference> is a single file/buffer, after uncompression C<$output_filename_or_reference> will contain a concatenation of all the uncompressed data from each of the input files/buffers. =head2 Optional Parameters The optional parameters for the one-shot function C<anyinflate> are (for the most part) identical to those used with the OO interface defined in the L</"Constructor Options"> section. The exceptions are listed below =over 5 =item C<< AutoClose => 0|1 >> This option applies to any input or output data streams to C<anyinflate> that are filehandles. If C<AutoClose> is specified, and the value is true, it will result in all input and/or output filehandles being closed once C<anyinflate> has completed. This parameter defaults to 0. =item C<< BinModeOut => 0|1 >> This option is now a no-op. All files will be written in binmode. =item C<< Append => 0|1 >> The behaviour of this option is dependent on the type of output data stream. =over 5 =item * A Buffer If C<Append> is enabled, all uncompressed data will be append to the end of the output buffer. Otherwise the output buffer will be cleared before any uncompressed data is written to it. =item * A Filename If C<Append> is enabled, the file will be opened in append mode. Otherwise the contents of the file, if any, will be truncated before any uncompressed data is written to it. =item * A Filehandle If C<Append> is enabled, the filehandle will be positioned to the end of the file via a call to C<seek> before any uncompressed data is written to it. Otherwise the file pointer will not be moved. =back When C<Append> is specified, and set to true, it will I<append> all uncompressed data to the output data stream. So when the output is a filehandle it will carry out a seek to the eof before writing any uncompressed data. If the output is a filename, it will be opened for appending. If the output is a buffer, all uncompressed data will be appended to the existing buffer. Conversely when C<Append> is not specified, or it is present and is set to false, it will operate as follows. When the output is a filename, it will truncate the contents of the file before writing any uncompressed data. If the output is a filehandle its position will not be changed. If the output is a buffer, it will be wiped before any uncompressed data is output. Defaults to 0. =item C<< MultiStream => 0|1 >> If the input file/buffer contains multiple compressed data streams, this option will uncompress the whole lot as a single data stream. Defaults to 0. =item C<< TrailingData => $scalar >> Returns the data, if any, that is present immediately after the compressed data stream once uncompression is complete. This option can be used when there is useful information immediately following the compressed data stream, and you don't know the length of the compressed data stream. If the input is a buffer, C<trailingData> will return everything from the end of the compressed data stream to the end of the buffer. If the input is a filehandle, C<trailingData> will return the data that is left in the filehandle input buffer once the end of the compressed data stream has been reached. You can then use the filehandle to read the rest of the input file. Don't bother using C<trailingData> if the input is a filename. If you know the length of the compressed data stream before you start uncompressing, you can avoid having to use C<trailingData> by setting the C<InputLength> option. =back =head2 Examples To read the contents of the file C<file1.txt.Compressed> and write the uncompressed data to the file C<file1.txt>. use strict ; use warnings ; use IO::Uncompress::AnyInflate qw(anyinflate $AnyInflateError) ; my $input = "file1.txt.Compressed"; my $output = "file1.txt"; anyinflate $input => $output or die "anyinflate failed: $AnyInflateError\n"; To read from an existing Perl filehandle, C<$input>, and write the uncompressed data to a buffer, C<$buffer>. use strict ; use warnings ; use IO::Uncompress::AnyInflate qw(anyinflate $AnyInflateError) ; use IO::File ; my $input = IO::File->new( "<file1.txt.Compressed" ) or die "Cannot open 'file1.txt.Compressed': $!\n" ; my $buffer ; anyinflate $input => \$buffer or die "anyinflate failed: $AnyInflateError\n"; To uncompress all files in the directory "/my/home" that match "*.txt.Compressed" and store the compressed data in the same directory use strict ; use warnings ; use IO::Uncompress::AnyInflate qw(anyinflate $AnyInflateError) ; anyinflate '</my/home/*.txt.Compressed>' => '</my/home/#1.txt>' or die "anyinflate failed: $AnyInflateError\n"; and if you want to compress each file one at a time, this will do the trick use strict ; use warnings ; use IO::Uncompress::AnyInflate qw(anyinflate $AnyInflateError) ; for my $input ( glob "/my/home/*.txt.Compressed" ) { my $output = $input; $output =~ s/.Compressed// ; anyinflate $input => $output or die "Error compressing '$input': $AnyInflateError\n"; } =head1 OO Interface =head2 Constructor The format of the constructor for IO::Uncompress::AnyInflate is shown below my $z = IO::Uncompress::AnyInflate->new( $input [OPTS] ) or die "IO::Uncompress::AnyInflate failed: $AnyInflateError\n"; Returns an C<IO::Uncompress::AnyInflate> object on success and undef on failure. The variable C<$AnyInflateError> will contain an error message on failure. If you are running Perl 5.005 or better the object, C<$z>, returned from IO::Uncompress::AnyInflate can be used exactly like an L<IO::File|IO::File> filehandle. This means that all normal input file operations can be carried out with C<$z>. For example, to read a line from a compressed file/buffer you can use either of these forms $line = $z->getline(); $line = <$z>; The mandatory parameter C<$input> is used to determine the source of the compressed data. This parameter can take one of three forms. =over 5 =item A filename If the C<$input> parameter is a scalar, it is assumed to be a filename. This file will be opened for reading and the compressed data will be read from it. =item A filehandle If the C<$input> parameter is a filehandle, the compressed data will be read from it. The string '-' can be used as an alias for standard input. =item A scalar reference If C<$input> is a scalar reference, the compressed data will be read from C<$$input>. =back =head2 Constructor Options The option names defined below are case insensitive and can be optionally prefixed by a '-'. So all of the following are valid -AutoClose -autoclose AUTOCLOSE autoclose OPTS is a combination of the following options: =over 5 =item C<< AutoClose => 0|1 >> This option is only valid when the C<$input> parameter is a filehandle. If specified, and the value is true, it will result in the file being closed once either the C<close> method is called or the IO::Uncompress::AnyInflate object is destroyed. This parameter defaults to 0. =item C<< MultiStream => 0|1 >> Allows multiple concatenated compressed streams to be treated as a single compressed stream. Decompression will stop once either the end of the file/buffer is reached, an error is encountered (premature eof, corrupt compressed data) or the end of a stream is not immediately followed by the start of another stream. This parameter defaults to 0. =item C<< Prime => $string >> This option will uncompress the contents of C<$string> before processing the input file/buffer. This option can be useful when the compressed data is embedded in another file/data structure and it is not possible to work out where the compressed data begins without having to read the first few bytes. If this is the case, the uncompression can be I<primed> with these bytes using this option. =item C<< Transparent => 0|1 >> If this option is set and the input file/buffer is not compressed data, the module will allow reading of it anyway. In addition, if the input file/buffer does contain compressed data and there is non-compressed data immediately following it, setting this option will make this module treat the whole file/buffer as a single data stream. This option defaults to 1. =item C<< BlockSize => $num >> When reading the compressed input data, IO::Uncompress::AnyInflate will read it in blocks of C<$num> bytes. This option defaults to 4096. =item C<< InputLength => $size >> When present this option will limit the number of compressed bytes read from the input file/buffer to C<$size>. This option can be used in the situation where there is useful data directly after the compressed data stream and you know beforehand the exact length of the compressed data stream. This option is mostly used when reading from a filehandle, in which case the file pointer will be left pointing to the first byte directly after the compressed data stream. This option defaults to off. =item C<< Append => 0|1 >> This option controls what the C<read> method does with uncompressed data. If set to 1, all uncompressed data will be appended to the output parameter of the C<read> method. If set to 0, the contents of the output parameter of the C<read> method will be overwritten by the uncompressed data. Defaults to 0. =item C<< Strict => 0|1 >> This option controls whether the extra checks defined below are used when carrying out the decompression. When Strict is on, the extra tests are carried out, when Strict is off they are not. The default for this option is off. If the input is an RFC 1950 data stream, the following will be checked: =over 5 =item 1 The ADLER32 checksum field must be present. =item 2 The value of the ADLER32 field read must match the adler32 value of the uncompressed data actually contained in the file. =back If the input is a gzip (RFC 1952) data stream, the following will be checked: =over 5 =item 1 If the FHCRC bit is set in the gzip FLG header byte, the CRC16 bytes in the header must match the crc16 value of the gzip header actually read. =item 2 If the gzip header contains a name field (FNAME) it consists solely of ISO 8859-1 characters. =item 3 If the gzip header contains a comment field (FCOMMENT) it consists solely of ISO 8859-1 characters plus line-feed. =item 4 If the gzip FEXTRA header field is present it must conform to the sub-field structure as defined in RFC 1952. =item 5 The CRC32 and ISIZE trailer fields must be present. =item 6 The value of the CRC32 field read must match the crc32 value of the uncompressed data actually contained in the gzip file. =item 7 The value of the ISIZE fields read must match the length of the uncompressed data actually read from the file. =back =item C<< RawInflate => 0|1 >> When auto-detecting the compressed format, try to test for raw-deflate (RFC 1951) content using the C<IO::Uncompress::RawInflate> module. The reason this is not default behaviour is because RFC 1951 content can only be detected by attempting to uncompress it. This process is error prone and can result is false positives. Defaults to 0. =item C<< ParseExtra => 0|1 >> If the gzip FEXTRA header field is present and this option is set, it will force the module to check that it conforms to the sub-field structure as defined in RFC 1952. If the C<Strict> is on it will automatically enable this option. Defaults to 0. =back =head2 Examples TODO =head1 Methods =head2 read Usage is $status = $z->read($buffer) Reads a block of compressed data (the size of the compressed block is determined by the C<Buffer> option in the constructor), uncompresses it and writes any uncompressed data into C<$buffer>. If the C<Append> parameter is set in the constructor, the uncompressed data will be appended to the C<$buffer> parameter. Otherwise C<$buffer> will be overwritten. Returns the number of uncompressed bytes written to C<$buffer>, zero if eof or a negative number on error. =head2 read Usage is $status = $z->read($buffer, $length) $status = $z->read($buffer, $length, $offset) $status = read($z, $buffer, $length) $status = read($z, $buffer, $length, $offset) Attempt to read C<$length> bytes of uncompressed data into C<$buffer>. The main difference between this form of the C<read> method and the previous one, is that this one will attempt to return I<exactly> C<$length> bytes. The only circumstances that this function will not is if end-of-file or an IO error is encountered. Returns the number of uncompressed bytes written to C<$buffer>, zero if eof or a negative number on error. =head2 getline Usage is $line = $z->getline() $line = <$z> Reads a single line. This method fully supports the use of the variable C<$/> (or C<$INPUT_RECORD_SEPARATOR> or C<$RS> when C<English> is in use) to determine what constitutes an end of line. Paragraph mode, record mode and file slurp mode are all supported. =head2 getc Usage is $char = $z->getc() Read a single character. =head2 ungetc Usage is $char = $z->ungetc($string) =head2 inflateSync Usage is $status = $z->inflateSync() TODO =head2 getHeaderInfo Usage is $hdr = $z->getHeaderInfo(); @hdrs = $z->getHeaderInfo(); This method returns either a hash reference (in scalar context) or a list or hash references (in array context) that contains information about each of the header fields in the compressed data stream(s). =head2 tell Usage is $z->tell() tell $z Returns the uncompressed file offset. =head2 eof Usage is $z->eof(); eof($z); Returns true if the end of the compressed input stream has been reached. =head2 seek $z->seek($position, $whence); seek($z, $position, $whence); Provides a sub-set of the C<seek> functionality, with the restriction that it is only legal to seek forward in the input file/buffer. It is a fatal error to attempt to seek backward. Note that the implementation of C<seek> in this module does not provide true random access to a compressed file/buffer. It works by uncompressing data from the current offset in the file/buffer until it reaches the uncompressed offset specified in the parameters to C<seek>. For very small files this may be acceptable behaviour. For large files it may cause an unacceptable delay. The C<$whence> parameter takes one the usual values, namely SEEK_SET, SEEK_CUR or SEEK_END. Returns 1 on success, 0 on failure. =head2 binmode Usage is $z->binmode binmode $z ; This is a noop provided for completeness. =head2 opened $z->opened() Returns true if the object currently refers to a opened file/buffer. =head2 autoflush my $prev = $z->autoflush() my $prev = $z->autoflush(EXPR) If the C<$z> object is associated with a file or a filehandle, this method returns the current autoflush setting for the underlying filehandle. If C<EXPR> is present, and is non-zero, it will enable flushing after every write/print operation. If C<$z> is associated with a buffer, this method has no effect and always returns C<undef>. B<Note> that the special variable C<$|> B<cannot> be used to set or retrieve the autoflush setting. =head2 input_line_number $z->input_line_number() $z->input_line_number(EXPR) Returns the current uncompressed line number. If C<EXPR> is present it has the effect of setting the line number. Note that setting the line number does not change the current position within the file/buffer being read. The contents of C<$/> are used to determine what constitutes a line terminator. =head2 fileno $z->fileno() fileno($z) If the C<$z> object is associated with a file or a filehandle, C<fileno> will return the underlying file descriptor. Once the C<close> method is called C<fileno> will return C<undef>. If the C<$z> object is associated with a buffer, this method will return C<undef>. =head2 close $z->close() ; close $z ; Closes the output file/buffer. For most versions of Perl this method will be automatically invoked if the IO::Uncompress::AnyInflate object is destroyed (either explicitly or by the variable with the reference to the object going out of scope). The exceptions are Perl versions 5.005 through 5.00504 and 5.8.0. In these cases, the C<close> method will be called automatically, but not until global destruction of all live objects when the program is terminating. Therefore, if you want your scripts to be able to run on all versions of Perl, you should call C<close> explicitly and not rely on automatic closing. Returns true on success, otherwise 0. If the C<AutoClose> option has been enabled when the IO::Uncompress::AnyInflate object was created, and the object is associated with a file, the underlying file will also be closed. =head2 nextStream Usage is my $status = $z->nextStream(); Skips to the next compressed data stream in the input file/buffer. If a new compressed data stream is found, the eof marker will be cleared and C<$.> will be reset to 0. Returns 1 if a new stream was found, 0 if none was found, and -1 if an error was encountered. =head2 trailingData Usage is my $data = $z->trailingData(); Returns the data, if any, that is present immediately after the compressed data stream once uncompression is complete. It only makes sense to call this method once the end of the compressed data stream has been encountered. This option can be used when there is useful information immediately following the compressed data stream, and you don't know the length of the compressed data stream. If the input is a buffer, C<trailingData> will return everything from the end of the compressed data stream to the end of the buffer. If the input is a filehandle, C<trailingData> will return the data that is left in the filehandle input buffer once the end of the compressed data stream has been reached. You can then use the filehandle to read the rest of the input file. Don't bother using C<trailingData> if the input is a filename. If you know the length of the compressed data stream before you start uncompressing, you can avoid having to use C<trailingData> by setting the C<InputLength> option in the constructor. =head1 Importing No symbolic constants are required by IO::Uncompress::AnyInflate at present. =over 5 =item :all Imports C<anyinflate> and C<$AnyInflateError>. Same as doing this use IO::Uncompress::AnyInflate qw(anyinflate $AnyInflateError) ; =back =head1 EXAMPLES =head2 Working with Net::FTP See L<IO::Compress::FAQ|IO::Compress::FAQ/"Compressed files and Net::FTP"> =head1 SUPPORT General feedback/questions/bug reports should be sent to L<https://github.com/pmqs/IO-Compress/issues> (preferred) or L<https://rt.cpan.org/Public/Dist/Display.html?Name=IO-Compress>. =head1 SEE ALSO 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::Lzma>, L<IO::Uncompress::UnLzma>, L<IO::Compress::Xz>, L<IO::Uncompress::UnXz>, L<IO::Compress::Lzip>, L<IO::Uncompress::UnLzip>, L<IO::Compress::Lzop>, L<IO::Uncompress::UnLzop>, L<IO::Compress::Lzf>, L<IO::Uncompress::UnLzf>, L<IO::Compress::Zstd>, L<IO::Uncompress::UnZstd>, L<IO::Uncompress::AnyUncompress> L<IO::Compress::FAQ|IO::Compress::FAQ> L<File::GlobMapper|File::GlobMapper>, L<Archive::Zip|Archive::Zip>, L<Archive::Tar|Archive::Tar>, L<IO::Zlib|IO::Zlib> For RFC 1950, 1951 and 1952 see L<http://www.faqs.org/rfcs/rfc1950.html>, L<http://www.faqs.org/rfcs/rfc1951.html> and L<http://www.faqs.org/rfcs/rfc1952.html> The I<zlib> compression library was written by Jean-loup Gailly C<gzip@prep.ai.mit.edu> and Mark Adler C<madler@alumni.caltech.edu>. The primary site for the I<zlib> compression library is L<http://www.zlib.org>. The primary site for gzip is L<http://www.gzip.org>. =head1 AUTHOR This module was written by Paul Marquess, C<pmqs@cpan.org>. =head1 MODIFICATION HISTORY See the Changes file. =head1 COPYRIGHT AND LICENSE Copyright (c) 2005-2021 Paul Marquess. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. PK ٚ!\6 j��c �c Bunzip2.pmnu �[��� package IO::Uncompress::Bunzip2 ; use strict ; use warnings; use bytes; use IO::Compress::Base::Common 2.101 qw(:Status ); use IO::Uncompress::Base 2.101 ; use IO::Uncompress::Adapter::Bunzip2 2.101 ; require Exporter ; our ($VERSION, @ISA, @EXPORT_OK, %EXPORT_TAGS, $Bunzip2Error); $VERSION = '2.102'; $Bunzip2Error = ''; @ISA = qw(IO::Uncompress::Base Exporter); @EXPORT_OK = qw( $Bunzip2Error bunzip2 ) ; #%EXPORT_TAGS = %IO::Uncompress::Base::EXPORT_TAGS ; push @{ $EXPORT_TAGS{all} }, @EXPORT_OK ; #Exporter::export_ok_tags('all'); sub new { my $class = shift ; my $obj = IO::Compress::Base::Common::createSelfTiedObject($class, \$Bunzip2Error); $obj->_create(undef, 0, @_); } sub bunzip2 { my $obj = IO::Compress::Base::Common::createSelfTiedObject(undef, \$Bunzip2Error); return $obj->_inf(@_); } sub getExtraParams { return ( 'verbosity' => [IO::Compress::Base::Common::Parse_boolean, 0], 'small' => [IO::Compress::Base::Common::Parse_boolean, 0], ); } sub ckParams { my $self = shift ; my $got = shift ; return 1; } sub mkUncomp { my $self = shift ; my $got = shift ; my $magic = $self->ckMagic() or return 0; *$self->{Info} = $self->readHeader($magic) or return undef ; my $Small = $got->getValue('small'); my $Verbosity = $got->getValue('verbosity'); my ($obj, $errstr, $errno) = IO::Uncompress::Adapter::Bunzip2::mkUncompObject( $Small, $Verbosity); return $self->saveErrorString(undef, $errstr, $errno) if ! defined $obj; *$self->{Uncomp} = $obj; return 1; } sub ckMagic { my $self = shift; my $magic ; $self->smartReadExact(\$magic, 4); *$self->{HeaderPending} = $magic ; return $self->HeaderError("Header size is " . 4 . " bytes") if length $magic != 4; return $self->HeaderError("Bad Magic.") if ! isBzip2Magic($magic) ; *$self->{Type} = 'bzip2'; return $magic; } sub readHeader { my $self = shift; my $magic = shift ; $self->pushBack($magic); *$self->{HeaderPending} = ''; return { 'Type' => 'bzip2', 'FingerprintLength' => 4, 'HeaderLength' => 4, 'TrailerLength' => 0, 'Header' => '$magic' }; } sub chkTrailer { return STATUS_OK; } sub isBzip2Magic { my $buffer = shift ; return $buffer =~ /^BZh\d$/; } 1 ; __END__ =head1 NAME IO::Uncompress::Bunzip2 - Read bzip2 files/buffers =head1 SYNOPSIS use IO::Uncompress::Bunzip2 qw(bunzip2 $Bunzip2Error) ; my $status = bunzip2 $input => $output [,OPTS] or die "bunzip2 failed: $Bunzip2Error\n"; my $z = IO::Uncompress::Bunzip2->new( $input [OPTS] ) or die "bunzip2 failed: $Bunzip2Error\n"; $status = $z->read($buffer) $status = $z->read($buffer, $length) $status = $z->read($buffer, $length, $offset) $line = $z->getline() $char = $z->getc() $char = $z->ungetc() $char = $z->opened() $data = $z->trailingData() $status = $z->nextStream() $data = $z->getHeaderInfo() $z->tell() $z->seek($position, $whence) $z->binmode() $z->fileno() $z->eof() $z->close() $Bunzip2Error ; # IO::File mode <$z> read($z, $buffer); read($z, $buffer, $length); read($z, $buffer, $length, $offset); tell($z) seek($z, $position, $whence) binmode($z) fileno($z) eof($z) close($z) =head1 DESCRIPTION This module provides a Perl interface that allows the reading of bzip2 files/buffers. For writing bzip2 files/buffers, see the companion module IO::Compress::Bzip2. =head1 Functional Interface A top-level function, C<bunzip2>, is provided to carry out "one-shot" uncompression between buffers and/or files. For finer control over the uncompression process, see the L</"OO Interface"> section. use IO::Uncompress::Bunzip2 qw(bunzip2 $Bunzip2Error) ; bunzip2 $input_filename_or_reference => $output_filename_or_reference [,OPTS] or die "bunzip2 failed: $Bunzip2Error\n"; The functional interface needs Perl5.005 or better. =head2 bunzip2 $input_filename_or_reference => $output_filename_or_reference [, OPTS] C<bunzip2> expects at least two parameters, C<$input_filename_or_reference> and C<$output_filename_or_reference> and zero or more optional parameters (see L</Optional Parameters>) =head3 The C<$input_filename_or_reference> parameter The parameter, C<$input_filename_or_reference>, is used to define the source of the compressed data. It can take one of the following forms: =over 5 =item A filename If the C<$input_filename_or_reference> parameter is a simple scalar, it is assumed to be a filename. This file will be opened for reading and the input data will be read from it. =item A filehandle If the C<$input_filename_or_reference> parameter is a filehandle, the input data will be read from it. The string '-' can be used as an alias for standard input. =item A scalar reference If C<$input_filename_or_reference> is a scalar reference, the input data will be read from C<$$input_filename_or_reference>. =item An array reference If C<$input_filename_or_reference> is an array reference, each element in the array must be a filename. The input data will be read from each file in turn. The complete array will be walked to ensure that it only contains valid filenames before any data is uncompressed. =item An Input FileGlob string If C<$input_filename_or_reference> is a string that is delimited by the characters "<" and ">" C<bunzip2> will assume that it is an I<input fileglob string>. The input is the list of files that match the fileglob. See L<File::GlobMapper|File::GlobMapper> for more details. =back If the C<$input_filename_or_reference> parameter is any other type, C<undef> will be returned. =head3 The C<$output_filename_or_reference> parameter The parameter C<$output_filename_or_reference> is used to control the destination of the uncompressed data. This parameter can take one of these forms. =over 5 =item A filename If the C<$output_filename_or_reference> parameter is a simple scalar, it is assumed to be a filename. This file will be opened for writing and the uncompressed data will be written to it. =item A filehandle If the C<$output_filename_or_reference> parameter is a filehandle, the uncompressed data will be written to it. The string '-' can be used as an alias for standard output. =item A scalar reference If C<$output_filename_or_reference> is a scalar reference, the uncompressed data will be stored in C<$$output_filename_or_reference>. =item An Array Reference If C<$output_filename_or_reference> is an array reference, the uncompressed data will be pushed onto the array. =item An Output FileGlob If C<$output_filename_or_reference> is a string that is delimited by the characters "<" and ">" C<bunzip2> will assume that it is an I<output fileglob string>. The output is the list of files that match the fileglob. When C<$output_filename_or_reference> is an fileglob string, C<$input_filename_or_reference> must also be a fileglob string. Anything else is an error. See L<File::GlobMapper|File::GlobMapper> for more details. =back If the C<$output_filename_or_reference> parameter is any other type, C<undef> will be returned. =head2 Notes When C<$input_filename_or_reference> maps to multiple compressed files/buffers and C<$output_filename_or_reference> is a single file/buffer, after uncompression C<$output_filename_or_reference> will contain a concatenation of all the uncompressed data from each of the input files/buffers. =head2 Optional Parameters The optional parameters for the one-shot function C<bunzip2> are (for the most part) identical to those used with the OO interface defined in the L</"Constructor Options"> section. The exceptions are listed below =over 5 =item C<< AutoClose => 0|1 >> This option applies to any input or output data streams to C<bunzip2> that are filehandles. If C<AutoClose> is specified, and the value is true, it will result in all input and/or output filehandles being closed once C<bunzip2> has completed. This parameter defaults to 0. =item C<< BinModeOut => 0|1 >> This option is now a no-op. All files will be written in binmode. =item C<< Append => 0|1 >> The behaviour of this option is dependent on the type of output data stream. =over 5 =item * A Buffer If C<Append> is enabled, all uncompressed data will be append to the end of the output buffer. Otherwise the output buffer will be cleared before any uncompressed data is written to it. =item * A Filename If C<Append> is enabled, the file will be opened in append mode. Otherwise the contents of the file, if any, will be truncated before any uncompressed data is written to it. =item * A Filehandle If C<Append> is enabled, the filehandle will be positioned to the end of the file via a call to C<seek> before any uncompressed data is written to it. Otherwise the file pointer will not be moved. =back When C<Append> is specified, and set to true, it will I<append> all uncompressed data to the output data stream. So when the output is a filehandle it will carry out a seek to the eof before writing any uncompressed data. If the output is a filename, it will be opened for appending. If the output is a buffer, all uncompressed data will be appended to the existing buffer. Conversely when C<Append> is not specified, or it is present and is set to false, it will operate as follows. When the output is a filename, it will truncate the contents of the file before writing any uncompressed data. If the output is a filehandle its position will not be changed. If the output is a buffer, it will be wiped before any uncompressed data is output. Defaults to 0. =item C<< MultiStream => 0|1 >> If the input file/buffer contains multiple compressed data streams, this option will uncompress the whole lot as a single data stream. Defaults to 0. =item C<< TrailingData => $scalar >> Returns the data, if any, that is present immediately after the compressed data stream once uncompression is complete. This option can be used when there is useful information immediately following the compressed data stream, and you don't know the length of the compressed data stream. If the input is a buffer, C<trailingData> will return everything from the end of the compressed data stream to the end of the buffer. If the input is a filehandle, C<trailingData> will return the data that is left in the filehandle input buffer once the end of the compressed data stream has been reached. You can then use the filehandle to read the rest of the input file. Don't bother using C<trailingData> if the input is a filename. If you know the length of the compressed data stream before you start uncompressing, you can avoid having to use C<trailingData> by setting the C<InputLength> option. =back =head2 Examples To read the contents of the file C<file1.txt.bz2> and write the uncompressed data to the file C<file1.txt>. use strict ; use warnings ; use IO::Uncompress::Bunzip2 qw(bunzip2 $Bunzip2Error) ; my $input = "file1.txt.bz2"; my $output = "file1.txt"; bunzip2 $input => $output or die "bunzip2 failed: $Bunzip2Error\n"; To read from an existing Perl filehandle, C<$input>, and write the uncompressed data to a buffer, C<$buffer>. use strict ; use warnings ; use IO::Uncompress::Bunzip2 qw(bunzip2 $Bunzip2Error) ; use IO::File ; my $input = IO::File->new( "<file1.txt.bz2" ) or die "Cannot open 'file1.txt.bz2': $!\n" ; my $buffer ; bunzip2 $input => \$buffer or die "bunzip2 failed: $Bunzip2Error\n"; To uncompress all files in the directory "/my/home" that match "*.txt.bz2" and store the compressed data in the same directory use strict ; use warnings ; use IO::Uncompress::Bunzip2 qw(bunzip2 $Bunzip2Error) ; bunzip2 '</my/home/*.txt.bz2>' => '</my/home/#1.txt>' or die "bunzip2 failed: $Bunzip2Error\n"; and if you want to compress each file one at a time, this will do the trick use strict ; use warnings ; use IO::Uncompress::Bunzip2 qw(bunzip2 $Bunzip2Error) ; for my $input ( glob "/my/home/*.txt.bz2" ) { my $output = $input; $output =~ s/.bz2// ; bunzip2 $input => $output or die "Error compressing '$input': $Bunzip2Error\n"; } =head1 OO Interface =head2 Constructor The format of the constructor for IO::Uncompress::Bunzip2 is shown below my $z = IO::Uncompress::Bunzip2->new( $input [OPTS] ) or die "IO::Uncompress::Bunzip2 failed: $Bunzip2Error\n"; Returns an C<IO::Uncompress::Bunzip2> object on success and undef on failure. The variable C<$Bunzip2Error> will contain an error message on failure. If you are running Perl 5.005 or better the object, C<$z>, returned from IO::Uncompress::Bunzip2 can be used exactly like an L<IO::File|IO::File> filehandle. This means that all normal input file operations can be carried out with C<$z>. For example, to read a line from a compressed file/buffer you can use either of these forms $line = $z->getline(); $line = <$z>; The mandatory parameter C<$input> is used to determine the source of the compressed data. This parameter can take one of three forms. =over 5 =item A filename If the C<$input> parameter is a scalar, it is assumed to be a filename. This file will be opened for reading and the compressed data will be read from it. =item A filehandle If the C<$input> parameter is a filehandle, the compressed data will be read from it. The string '-' can be used as an alias for standard input. =item A scalar reference If C<$input> is a scalar reference, the compressed data will be read from C<$$input>. =back =head2 Constructor Options The option names defined below are case insensitive and can be optionally prefixed by a '-'. So all of the following are valid -AutoClose -autoclose AUTOCLOSE autoclose OPTS is a combination of the following options: =over 5 =item C<< AutoClose => 0|1 >> This option is only valid when the C<$input> parameter is a filehandle. If specified, and the value is true, it will result in the file being closed once either the C<close> method is called or the IO::Uncompress::Bunzip2 object is destroyed. This parameter defaults to 0. =item C<< MultiStream => 0|1 >> Allows multiple concatenated compressed streams to be treated as a single compressed stream. Decompression will stop once either the end of the file/buffer is reached, an error is encountered (premature eof, corrupt compressed data) or the end of a stream is not immediately followed by the start of another stream. This parameter defaults to 0. =ite
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