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GseTDDUebungKCLR/database/perl/vendor/lib/IO/Uncompress/UnLzip.pm
Riley Schneider b732d8d4b5 Initial Commit
2025-12-03 16:38:10 +01:00

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package IO::Uncompress::UnLzip ;
use strict ;
use warnings;
use bytes;
use IO::Compress::Base::Common 2.100 qw(:Status createSelfTiedObject);
use IO::Uncompress::Base 2.100 ;
use IO::Uncompress::Adapter::UnLzip 2.100 ;
require Exporter ;
our ($VERSION, @ISA, @EXPORT_OK, %EXPORT_TAGS, $UnLzipError);
$VERSION = '2.100';
$UnLzipError = '';
@ISA = qw( IO::Uncompress::Base Exporter );
@EXPORT_OK = qw( $UnLzipError unlzip ) ;
#%EXPORT_TAGS = %IO::Uncompress::Base::EXPORT_TAGS ;
push @{ $EXPORT_TAGS{all} }, @EXPORT_OK ;
#Exporter::export_ok_tags('all');
sub new
{
my $class = shift ;
my $obj = createSelfTiedObject($class, \$UnLzipError);
$obj->_create(undef, 0, @_);
}
sub unlzip
{
my $obj = createSelfTiedObject(undef, \$UnLzipError);
return $obj->_inf(@_);
}
#our %PARAMS = (
#'verbosity' => [IO::Compress::Base::Common::Parse_boolean, 0],
#'small' => [IO::Compress::Base::Common::Parse_boolean, 0],
# );
sub getExtraParams
{
return ();
}
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, $errno) = IO::Uncompress::Adapter::UnLzip::mkUncompObject(
*$self->{Info}{DictSize});
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("Minimum header size is " .
4 . " bytes")
if length $magic != 4 ;
return $self->HeaderError("Bad Magic")
if $magic ne 'LZIP' ;
*$self->{Type} = 'lzip';
return $magic ;
}
sub readHeader
{
my $self = shift;
my $magic = shift ;
my ($buffer) = '' ;
$self->smartReadExact(\$buffer, 2)
or return $self->HeaderError("Minimum header size is " .
2 . " bytes") ;
my $keep = $magic . $buffer ;
*$self->{HeaderPending} = $keep ;
my ($VN, $DS) = unpack("C C", $buffer) ;
# Version should be 0 or 1
return $self->HeaderError("lzip version not 0 or 1: $VN")
unless $VN == 0 or $VN == 1 ;
# Dictionary logic derived from libarchive archive_read_support_filter_xz.c
my $log2dic = $DS & 0x1f;
return $self->HeaderError("Bad Dictionary Value")
if $log2dic < 12 || $log2dic > 27 ;
my $dicsize = 1 << $log2dic;
$dicsize -= ($dicsize / 16) * ($DS >> 5)
if $log2dic > 12 ;
return {
'Type' => 'lzip',
'Version' => $VN,
'FingerprintLength' => 4,
'HeaderLength' => 6,
'TrailerLength' => $VN ? 20 : 12,
'Header' => $keep,
'Version' => $VN,
'DictSize' => $dicsize,
};
}
sub chkTrailer
{
my $self = shift;
my $trailer = shift;
my $not_version_0 = *$self->{Info}{Version} != 0;
# Check CRC & ISIZE
my $CRC32 = unpack("V", $trailer) ;
my $uSize = U64::newUnpack_V64 substr($trailer, 4, 8);
my $mSize;
if ($not_version_0)
{
$mSize = U64::newUnpack_V64 substr($trailer, 12, 8);
*$self->{Info}{CompressedLength} = $mSize->get64bit();
}
*$self->{Info}{CRC32} = $CRC32;
*$self->{Info}{UncompressedLength} = $uSize->get64bit();
if (*$self->{Strict}) {
return $self->TrailerError("CRC mismatch")
if $CRC32 != *$self->{Uncomp}->crc32() ;
return $self->TrailerError("USIZE mismatch.")
if ! $uSize->equal(*$self->{UnCompSize});
if ($not_version_0)
{
$mSize->subtract(6 + 20); # header & trailer
return $self->TrailerError("CSIZE mismatch.")
if ! $mSize->equal(*$self->{CompSize});
}
}
return STATUS_OK;
}
1 ;
__END__
=head1 NAME
IO::Uncompress::UnLzip - Read lzip files/buffers
=head1 SYNOPSIS
use IO::Uncompress::UnLzip qw(unlzip $UnLzipError) ;
my $status = unlzip $input => $output [,OPTS]
or die "unlzip failed: $UnLzipError\n";
my $z = IO::Uncompress::UnLzip->new( $input [OPTS] )
or die "unlzip failed: $UnLzipError\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()
$UnLzipError ;
# IO::File mode
<$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
lzma files/buffers.
For writing lzip files/buffers, see the companion module IO::Compress::Lzip.
=head1 Functional Interface
A top-level function, C<unlzip>, 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::UnLzip qw(unlzip $UnLzipError) ;
unlzip $input_filename_or_reference => $output_filename_or_reference [,OPTS]
or die "unlzip failed: $UnLzipError\n";
The functional interface needs Perl5.005 or better.
=head2 unlzip $input_filename_or_reference => $output_filename_or_reference [, OPTS]
C<unlzip> expects at least two parameters,
C<$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<$$input_filename_or_reference>.
=item An array reference
If C<$input_filename_or_reference> is an array reference, each element in
the array must be a filename.
The input data will be read from each file in turn.
The complete array will be walked to ensure that it only
contains valid filenames before any data is uncompressed.
=item An Input FileGlob string
If C<$input_filename_or_reference> is a string that is delimited by the
characters "<" and ">" C<unlzip> will assume that it is an
I<input fileglob string>. The input is the list of files that match the
fileglob.
See L<File::GlobMapper|File::GlobMapper> for more details.
=back
If the C<$input_filename_or_reference> parameter is any other type,
C<undef> will be returned.
=head3 The C<$output_filename_or_reference> parameter
The parameter C<$output_filename_or_reference> is used to control the
destination of the uncompressed data. This parameter can take one of
these forms.
=over 5
=item A filename
If the C<$output_filename_or_reference> parameter is a simple scalar, it is
assumed to be a filename. This file will be opened for writing and the
uncompressed data will be written to it.
=item A filehandle
If the C<$output_filename_or_reference> parameter is a filehandle, the
uncompressed data will be written to it. The string '-' can be used as
an alias for standard output.
=item A scalar reference
If C<$output_filename_or_reference> is a scalar reference, the
uncompressed data will be stored in C<$$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<unlzip> 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<unlzip>
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<unlzip> 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<unlzip> 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.xz> and write the
uncompressed data to the file C<file1.txt>.
use strict ;
use warnings ;
use IO::Uncompress::UnLzip qw(unlzip $UnLzipError) ;
my $input = "file1.txt.xz";
my $output = "file1.txt";
unlzip $input => $output
or die "unlzip failed: $UnLzipError\n";
To read from an existing Perl filehandle, C<$input>, and write the
uncompressed data to a buffer, C<$buffer>.
use strict ;
use warnings ;
use IO::Uncompress::UnLzip qw(unlzip $UnLzipError) ;
use IO::File ;
my $input = IO::File->new( "<file1.txt.xz" )
or die "Cannot open 'file1.txt.xz': $!\n" ;
my $buffer ;
unlzip $input => \$buffer
or die "unlzip failed: $UnLzipError\n";
To uncompress all files in the directory "/my/home" that match "*.txt.xz" and store the compressed data in the same directory
use strict ;
use warnings ;
use IO::Uncompress::UnLzip qw(unlzip $UnLzipError) ;
unlzip '</my/home/*.txt.xz>' => '</my/home/#1.txt>'
or die "unlzip failed: $UnLzipError\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::UnLzip qw(unlzip $UnLzipError) ;
for my $input ( glob "/my/home/*.txt.xz" )
{
my $output = $input;
$output =~ s/.xz// ;
unlzip $input => $output
or die "Error compressing '$input': $UnLzipError\n";
}
=head1 OO Interface
=head2 Constructor
The format of the constructor for IO::Uncompress::UnLzip is shown below
my $z = IO::Uncompress::UnLzip->new( $input [OPTS] )
or die "IO::Uncompress::UnLzip failed: $UnLzipError\n";
Returns an C<IO::Uncompress::UnLzip> object on success and undef on failure.
The variable C<$UnLzipError> will contain an error message on failure.
If you are running Perl 5.005 or better the object, C<$z>, returned from
IO::Uncompress::UnLzip can be used exactly like an L<IO::File|IO::File> filehandle.
This means that all normal input file operations can be carried out with
C<$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::UnLzip 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 => $num >>
When reading the compressed input data, IO::Uncompress::UnLzip will read it in
blocks of C<$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 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::UnLzip 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::UnLzip
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 = $z->trailingData();
Returns the data, if any, that is present immediately after the compressed
data stream once uncompression is complete. It only makes sense to call
this method once the end of the compressed data stream has been
encountered.
This option can be used when there is useful information immediately
following the compressed data stream, and you don't know the length of the
compressed data stream.
If the input is a buffer, C<trailingData> will return everything from the
end of the compressed data stream to the end of the buffer.
If the input is a filehandle, C<trailingData> will return the data that is
left in the filehandle input buffer once the end of the compressed data
stream has been reached. You can then use the filehandle to read the rest
of the input file.
Don't bother using C<trailingData> if the input is a filename.
If you know the length of the compressed data stream before you start
uncompressing, you can avoid having to use C<trailingData> by setting the
C<InputLength> option in the constructor.
=head1 Importing
No symbolic constants are required by IO::Uncompress::UnLzip at present.
=over 5
=item :all
Imports C<unlzip> and C<$UnLzipError>.
Same as doing this
use IO::Uncompress::UnLzip qw(unlzip $UnLzipError) ;
=back
=head1 EXAMPLES
=head1 SUPPORT
General feedback/questions/bug reports should be sent to
L<https://github.com/pmqs/IO-Compress-Lzma/issues> (preferred) or
L<https://rt.cpan.org/Public/Dist/Display.html?Name=IO-Compress-Lzma>.
=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::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>
=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.
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