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PK     �siZj�b�:  �:    Zlib.pmnu �[���        # IO::Zlib.pm
#
# Copyright (c) 1998-2004 Tom Hughes <tom@compton.nu>.
# All rights reserved. This program is free software; you can redistribute
# it and/or modify it under the same terms as Perl itself.

package IO::Zlib;

$VERSION = "1.10";

=head1 NAME

IO::Zlib - IO:: style interface to L<Compress::Zlib>

=head1 SYNOPSIS

With any version of Perl 5 you can use the basic OO interface:

    use IO::Zlib;

    $fh = new IO::Zlib;
    if ($fh->open("file.gz", "rb")) {
        print <$fh>;
        $fh->close;
    }

    $fh = IO::Zlib->new("file.gz", "wb9");
    if (defined $fh) {
        print $fh "bar\n";
        $fh->close;
    }

    $fh = IO::Zlib->new("file.gz", "rb");
    if (defined $fh) {
        print <$fh>;
        undef $fh;       # automatically closes the file
    }

With Perl 5.004 you can also use the TIEHANDLE interface to access
compressed files just like ordinary files:

    use IO::Zlib;

    tie *FILE, 'IO::Zlib', "file.gz", "wb";
    print FILE "line 1\nline2\n";

    tie *FILE, 'IO::Zlib', "file.gz", "rb";
    while (<FILE>) { print "LINE: ", $_ };

=head1 DESCRIPTION

C<IO::Zlib> provides an IO:: style interface to L<Compress::Zlib> and
hence to gzip/zlib compressed files. It provides many of the same methods
as the L<IO::Handle> interface.

Starting from IO::Zlib version 1.02, IO::Zlib can also use an
external F<gzip> command.  The default behaviour is to try to use
an external F<gzip> if no C<Compress::Zlib> can be loaded, unless
explicitly disabled by

    use IO::Zlib qw(:gzip_external 0);

If explicitly enabled by

    use IO::Zlib qw(:gzip_external 1);

then the external F<gzip> is used B<instead> of C<Compress::Zlib>.

=head1 CONSTRUCTOR

=over 4

=item new ( [ARGS] )

Creates an C<IO::Zlib> object. If it receives any parameters, they are
passed to the method C<open>; if the open fails, the object is destroyed.
Otherwise, it is returned to the caller.

=back

=head1 OBJECT METHODS

=over 4

=item open ( FILENAME, MODE )

C<open> takes two arguments. The first is the name of the file to open
and the second is the open mode. The mode can be anything acceptable to
L<Compress::Zlib> and by extension anything acceptable to I<zlib> (that
basically means POSIX fopen() style mode strings plus an optional number
to indicate the compression level).

=item opened

Returns true if the object currently refers to a opened file.

=item close

Close the file associated with the object and disassociate
the file from the handle.
Done automatically on destroy.

=item getc

Return the next character from the file, or undef if none remain.

=item getline

Return the next line from the file, or undef on end of string.
Can safely be called in an array context.
Currently ignores $/ ($INPUT_RECORD_SEPARATOR or $RS when L<English>
is in use) and treats lines as delimited by "\n".

=item getlines

Get all remaining lines from the file.
It will croak() if accidentally called in a scalar context.

=item print ( ARGS... )

Print ARGS to the  file.

=item read ( BUF, NBYTES, [OFFSET] )

Read some bytes from the file.
Returns the number of bytes actually read, 0 on end-of-file, undef on error.

=item eof

Returns true if the handle is currently positioned at end of file?

=item seek ( OFFSET, WHENCE )

Seek to a given position in the stream.
Not yet supported.

=item tell

Return the current position in the stream, as a numeric offset.
Not yet supported.

=item setpos ( POS )

Set the current position, using the opaque value returned by C<getpos()>.
Not yet supported.

=item getpos ( POS )

Return the current position in the string, as an opaque object.
Not yet supported.

=back

=head1 USING THE EXTERNAL GZIP

If the external F<gzip> is used, the following C<open>s are used:

    open(FH, "gzip -dc $filename |")  # for read opens
    open(FH, " | gzip > $filename")   # for write opens

You can modify the 'commands' for example to hardwire
an absolute path by e.g.

    use IO::Zlib ':gzip_read_open'  => '/some/where/gunzip -c %s |';
    use IO::Zlib ':gzip_write_open' => '| /some/where/gzip.exe > %s';

The C<%s> is expanded to be the filename (C<sprintf> is used, so be
careful to escape any other C<%> signs).  The 'commands' are checked
for sanity - they must contain the C<%s>, and the read open must end
with the pipe sign, and the write open must begin with the pipe sign.

=head1 CLASS METHODS

=over 4

=item has_Compress_Zlib

Returns true if C<Compress::Zlib> is available.  Note that this does
not mean that C<Compress::Zlib> is being used: see L</gzip_external>
and L<gzip_used>.

=item gzip_external

Undef if an external F<gzip> B<can> be used if C<Compress::Zlib> is
not available (see L</has_Compress_Zlib>), true if an external F<gzip>
is explicitly used, false if an external F<gzip> must not be used.
See L</gzip_used>.

=item gzip_used

True if an external F<gzip> is being used, false if not.

=item gzip_read_open

Return the 'command' being used for opening a file for reading using an
external F<gzip>.

=item gzip_write_open

Return the 'command' being used for opening a file for writing using an
external F<gzip>.

=back

=head1 DIAGNOSTICS

=over 4

=item IO::Zlib::getlines: must be called in list context

If you want read lines, you must read in list context.

=item IO::Zlib::gzopen_external: mode '...' is illegal

Use only modes 'rb' or 'wb' or /wb[1-9]/.

=item IO::Zlib::import: '...' is illegal

The known import symbols are the C<:gzip_external>, C<:gzip_read_open>,
and C<:gzip_write_open>.  Anything else is not recognized.

=item IO::Zlib::import: ':gzip_external' requires an argument

The C<:gzip_external> requires one boolean argument.

=item IO::Zlib::import: 'gzip_read_open' requires an argument

The C<:gzip_external> requires one string argument.

=item IO::Zlib::import: 'gzip_read' '...' is illegal

The C<:gzip_read_open> argument must end with the pipe sign (|)
and have the C<%s> for the filename.  See L</"USING THE EXTERNAL GZIP">.

=item IO::Zlib::import: 'gzip_write_open' requires an argument

The C<:gzip_external> requires one string argument.

=item IO::Zlib::import: 'gzip_write_open' '...' is illegal

The C<:gzip_write_open> argument must begin with the pipe sign (|)
and have the C<%s> for the filename.  An output redirect (>) is also
often a good idea, depending on your operating system shell syntax.
See L</"USING THE EXTERNAL GZIP">.

=item IO::Zlib::import: no Compress::Zlib and no external gzip

Given that we failed to load C<Compress::Zlib> and that the use of
 an external F<gzip> was disabled, IO::Zlib has not much chance of working.

=item IO::Zlib::open: needs a filename

No filename, no open.

=item IO::Zlib::READ: NBYTES must be specified

We must know how much to read.

=item IO::Zlib::WRITE: too long LENGTH

The LENGTH must be less than or equal to the buffer size.

=back

=head1 SEE ALSO

L<perlfunc>,
L<perlop/"I/O Operators">,
L<IO::Handle>,
L<Compress::Zlib>

=head1 HISTORY

Created by Tom Hughes E<lt>F<tom@compton.nu>E<gt>.

Support for external gzip added by Jarkko Hietaniemi E<lt>F<jhi@iki.fi>E<gt>.

=head1 COPYRIGHT

Copyright (c) 1998-2004 Tom Hughes E<lt>F<tom@compton.nu>E<gt>.
All rights reserved. This program is free software; you can redistribute
it and/or modify it under the same terms as Perl itself.

=cut

require 5.006;

use strict;
use vars qw($VERSION $AUTOLOAD @ISA);

use Carp;
use Fcntl qw(SEEK_SET);

my $has_Compress_Zlib;
my $aliased;

sub has_Compress_Zlib {
    $has_Compress_Zlib;
}

BEGIN {
    eval { require Compress::Zlib };
    $has_Compress_Zlib = $@ || $Compress::Zlib::VERSION < 2.000 ? 0 : 1;
}

use Symbol;
use Tie::Handle;

# These might use some $^O logic.
my $gzip_read_open   = "gzip -dc %s |";
my $gzip_write_open  = "| gzip > %s";

my $gzip_external;
my $gzip_used;

sub gzip_read_open {
    $gzip_read_open;
}

sub gzip_write_open {
    $gzip_write_open;
}

sub gzip_external {
    $gzip_external;
}

sub gzip_used {
    $gzip_used;
}

sub can_gunzip {
    $has_Compress_Zlib || $gzip_external;
}

sub _import {
    my $import = shift;
    while (@_) {
	if ($_[0] eq ':gzip_external') {
	    shift;
	    if (@_) {
		$gzip_external = shift;
	    } else {
		croak "$import: ':gzip_external' requires an argument";
	    }
	}
	elsif ($_[0] eq ':gzip_read_open') {
	    shift;
	    if (@_) {
		$gzip_read_open = shift;
		croak "$import: ':gzip_read_open' '$gzip_read_open' is illegal"
		    unless $gzip_read_open =~ /^.+%s.+\|\s*$/;
	    } else {
		croak "$import: ':gzip_read_open' requires an argument";
	    }
	}
	elsif ($_[0] eq ':gzip_write_open') {
	    shift;
	    if (@_) {
		$gzip_write_open = shift;
		croak "$import: ':gzip_write_open' '$gzip_read_open' is illegal"
		    unless $gzip_write_open =~ /^\s*\|.+%s.*$/;
	    } else {
		croak "$import: ':gzip_write_open' requires an argument";
	    }
	}
	else {
	    last;
	}
    }
    return @_;
}

sub _alias {
    my $import = shift;
    if ((!$has_Compress_Zlib && !defined $gzip_external) || $gzip_external) {
	# The undef *gzopen is really needed only during
	# testing where we eval several 'use IO::Zlib's.
	undef *gzopen;
        *gzopen                 = \&gzopen_external;
        *IO::Handle::gzread     = \&gzread_external;
        *IO::Handle::gzwrite    = \&gzwrite_external;
        *IO::Handle::gzreadline = \&gzreadline_external;
        *IO::Handle::gzeof      = \&gzeof_external;
        *IO::Handle::gzclose    = \&gzclose_external;
	$gzip_used = 1;
    } else {
	croak "$import: no Compress::Zlib and no external gzip"
	    unless $has_Compress_Zlib;
        *gzopen     = \&Compress::Zlib::gzopen;
        *gzread     = \&Compress::Zlib::gzread;
        *gzwrite    = \&Compress::Zlib::gzwrite;
        *gzreadline = \&Compress::Zlib::gzreadline;
        *gzeof      = \&Compress::Zlib::gzeof;
    }
    $aliased = 1;
}

sub import {
    shift;
    my $import = "IO::Zlib::import";
    if (@_) {
	if (_import($import, @_)) {
	    croak "$import: '@_' is illegal";
	}
    }
    _alias($import);
}

@ISA = qw(Tie::Handle);

sub TIEHANDLE
{
    my $class = shift;
    my @args = @_;

    my $self = bless {}, $class;

    return @args ? $self->OPEN(@args) : $self;
}

sub DESTROY
{
}

sub OPEN
{
    my $self = shift;
    my $filename = shift;
    my $mode = shift;

    croak "IO::Zlib::open: needs a filename" unless defined($filename);

    $self->{'file'} = gzopen($filename,$mode);

    return defined($self->{'file'}) ? $self : undef;
}

sub CLOSE
{
    my $self = shift;

    return undef unless defined($self->{'file'});

    my $status = $self->{'file'}->gzclose();

    delete $self->{'file'};

    return ($status == 0) ? 1 : undef;
}

sub READ
{
    my $self = shift;
    my $bufref = \$_[0];
    my $nbytes = $_[1];
    my $offset = $_[2] || 0;

    croak "IO::Zlib::READ: NBYTES must be specified" unless defined($nbytes);

    $$bufref = "" unless defined($$bufref);

    my $bytesread = $self->{'file'}->gzread(substr($$bufref,$offset),$nbytes);

    return undef if $bytesread < 0;

    return $bytesread;
}

sub READLINE
{
    my $self = shift;

    my $line;

    return () if $self->{'file'}->gzreadline($line) <= 0;

    return $line unless wantarray;

    my @lines = $line;

    while ($self->{'file'}->gzreadline($line) > 0)
    {
        push @lines, $line;
    }

    return @lines;
}

sub WRITE
{
    my $self = shift;
    my $buf = shift;
    my $length = shift;
    my $offset = shift;

    croak "IO::Zlib::WRITE: too long LENGTH" unless $offset + $length <= length($buf);

    return $self->{'file'}->gzwrite(substr($buf,$offset,$length));
}

sub EOF
{
    my $self = shift;

    return $self->{'file'}->gzeof();
}

sub FILENO
{
    return undef;
}

sub new
{
    my $class = shift;
    my @args = @_;

    _alias("new", @_) unless $aliased; # Some call new IO::Zlib directly...

    my $self = gensym();

    tie *{$self}, $class, @args;

    return tied(${$self}) ? bless $self, $class : undef;
}

sub getline
{
    my $self = shift;

    return scalar tied(*{$self})->READLINE();
}

sub getlines
{
    my $self = shift;

    croak "IO::Zlib::getlines: must be called in list context"
	unless wantarray;

    return tied(*{$self})->READLINE();
}

sub opened
{
    my $self = shift;

    return defined tied(*{$self})->{'file'};
}

sub AUTOLOAD
{
    my $self = shift;

    $AUTOLOAD =~ s/.*:://;
    $AUTOLOAD =~ tr/a-z/A-Z/;

    return tied(*{$self})->$AUTOLOAD(@_);
}

sub gzopen_external {
    my ($filename, $mode) = @_;
    require IO::Handle;
    my $fh = IO::Handle->new();
    if ($mode =~ /r/) {
	# Because someone will try to read ungzipped files
	# with this we peek and verify the signature.  Yes,
	# this means that we open the file twice (if it is
	# gzipped).
	# Plenty of race conditions exist in this code, but
	# the alternative would be to capture the stderr of
	# gzip and parse it, which would be a portability nightmare.
	if (-e $filename && open($fh, $filename)) {
	    binmode $fh;
	    my $sig;
	    my $rdb = read($fh, $sig, 2);
	    if ($rdb == 2 && $sig eq "\x1F\x8B") {
		my $ropen = sprintf $gzip_read_open, $filename;
		if (open($fh, $ropen)) {
		    binmode $fh;
		    return $fh;
		} else {
		    return undef;
		}
	    }
	    seek($fh, 0, SEEK_SET) or
		die "IO::Zlib: open('$filename', 'r'): seek: $!";
	    return $fh;
	} else {
	    return undef;
	}
    } elsif ($mode =~ /w/) {
	my $level = '';
	$level = "-$1" if $mode =~ /([1-9])/;
	# To maximize portability we would need to open
	# two filehandles here, one for "| gzip $level"
	# and another for "> $filename", and then when
	# writing copy bytes from the first to the second.
	# We are using IO::Handle objects for now, however,
	# and they can only contain one stream at a time.
	my $wopen = sprintf $gzip_write_open, $filename;
	if (open($fh, $wopen)) {
	    $fh->autoflush(1);
	    binmode $fh;
	    return $fh;
	} else {
	    return undef;
	}
    } else {
	croak "IO::Zlib::gzopen_external: mode '$mode' is illegal";
    }
    return undef;
}

sub gzread_external {
    # Use read() instead of syswrite() because people may
    # mix reads and readlines, and we don't want to mess
    # the stdio buffering.  See also gzreadline_external()
    # and gzwrite_external().
    my $nread = read($_[0], $_[1], @_ == 3 ? $_[2] : 4096);
    defined $nread ? $nread : -1;
}

sub gzwrite_external {
    # Using syswrite() is okay (cf. gzread_external())
    # since the bytes leave this process and buffering
    # is therefore not an issue.
    my $nwrote = syswrite($_[0], $_[1]);
    defined $nwrote ? $nwrote : -1;
}

sub gzreadline_external {
    # See the comment in gzread_external().
    $_[1] = readline($_[0]);
    return defined $_[1] ? length($_[1]) : -1;
}

sub gzeof_external {
    return eof($_[0]);
}

sub gzclose_external {
    close($_[0]);
    # I am not entirely certain why this is needed but it seems
    # the above close() always fails (as if the stream would have
    # been already closed - something to do with using external
    # processes via pipes?)
    return 0;
}

1;
PK     �siZ����|  �|    Uncompress/Gunzip.pmnu �[���        
package IO::Uncompress::Gunzip ;

require 5.006 ;

# for RFC1952

use strict ;
use warnings;
use bytes;

use IO::Uncompress::RawInflate 2.061 ;

use Compress::Raw::Zlib 2.061 () ;
use IO::Compress::Base::Common 2.061 qw(:Status );
use IO::Compress::Gzip::Constants 2.061 ;
use IO::Compress::Zlib::Extra 2.061 ;

require Exporter ;

our ($VERSION, @ISA, @EXPORT_OK, %EXPORT_TAGS, $GunzipError);

@ISA = qw( Exporter IO::Uncompress::RawInflate );
@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 = '2.061';

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 = new IO::Uncompress::Gunzip $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>.

=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 <$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

Unless specified below, the optional parameters for C<gunzip>,
C<OPTS>, are the same as those used with the OO interface defined in the
L</"Constructor Options"> section 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 >>

When writing to a file or filehandle, set C<binmode> before writing to the
file.

Defaults to 0.

=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 = new IO::File "<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 = new IO::Uncompress::Gunzip $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 the 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 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
ucompressed 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 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 this 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 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::Lzop>, L<IO::Uncompress::UnLzop>, L<IO::Compress::Lzf>, L<IO::Uncompress::UnLzf>, 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 
F<http://www.faqs.org/rfcs/rfc1950.html>,
F<http://www.faqs.org/rfcs/rfc1951.html> and
F<http://www.faqs.org/rfcs/rfc1952.html>

The I<zlib> compression library was written by Jean-loup Gailly
F<gzip@prep.ai.mit.edu> and Mark Adler F<madler@alumni.caltech.edu>.

The primary site for the I<zlib> compression library is
F<http://www.zlib.org>.

The primary site for gzip is F<http://www.gzip.org>.

=head1 AUTHOR

This module was written by Paul Marquess, F<pmqs@cpan.org>. 

=head1 MODIFICATION HISTORY

See the Changes file.

=head1 COPYRIGHT AND LICENSE

Copyright (c) 2005-2013 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     �siZ4�x�}X  }X    Uncompress/Bunzip2.pmnu �[���        package IO::Uncompress::Bunzip2 ;

use strict ;
use warnings;
use bytes;

use IO::Compress::Base::Common 2.061 qw(:Status );

use IO::Uncompress::Base 2.061 ;
use IO::Uncompress::Adapter::Bunzip2 2.061 ;

require Exporter ;
our ($VERSION, @ISA, @EXPORT_OK, %EXPORT_TAGS, $Bunzip2Error);

$VERSION = '2.061';
$Bunzip2Error = '';

@ISA    = qw( Exporter IO::Uncompress::Base );
@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 = new IO::Uncompress::Bunzip2 $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 => $output [,OPTS] 
        or die "bunzip2 failed: $Bunzip2Error\n";

The functional interface needs Perl5.005 or better.

=head2 bunzip2 $input => $output [, OPTS]

C<bunzip2> expects at least two parameters, C<$input> and C<$output>.

=head3 The C<$input> parameter

The parameter, C<$input>, 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> 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> 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> is a scalar reference, the input data will be read
from C<$$input>.

=item An array reference 

If C<$input> 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> 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.

If the fileglob does not match any files ...

See L<File::GlobMapper|File::GlobMapper> for more details.

=back

If the C<$input> parameter is any other type, C<undef> will be returned.

=head3 The C<$output> parameter

The parameter C<$output> 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> 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> 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> is a scalar reference, the uncompressed data will be
stored in C<$$output>.

=item An Array Reference

If C<$output> is an array reference, the uncompressed data will be
pushed onto the array.

=item An Output FileGlob

If C<$output> 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<$output> is an fileglob string, C<$input> must also be a fileglob
string. Anything else is an error.

=back

If the C<$output> parameter is any other type, C<undef> will be returned.

=head2 Notes

When C<$input> maps to multiple compressed files/buffers and C<$output> is
a single file/buffer, after uncompression C<$output> will contain a
concatenation of all the uncompressed data from each of the input
files/buffers.

=head2 Optional Parameters

Unless specified below, the optional parameters for C<bunzip2>,
C<OPTS>, are the same as those used with the OO interface defined in the
L</"Constructor Options"> section 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 >>

When writing to a file or filehandle, set C<binmode> before writing to the
file.

Defaults to 0.

=item C<< Append => 0|1 >>

TODO

=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
compressed 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 = new IO::File "<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 = new IO::Uncompress::Bunzip2 $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<$$output>.

=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.

=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/bufffer as a single data stream.

This option defaults to 1.

=item C<< BlockSize => $num >>

When reading the compressed input data, IO::Uncompress::Bunzip2 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.

=item C<< Small => 0|1 >>

When non-zero this options will make bzip2 use a decompression algorithm
that uses less memory at the expense of increasing the amount of time
taken for decompression. 

Default is 0.

=back

=head2 Examples

TODO

=head1 Methods 

=head2 read

Usage is

    $status = $z->read($buffer)

Reads a block of compressed data (the size the 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 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.

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 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 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::Bunzip2 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::Bunzip2
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 this IO::Uncompress::Bunzip2 at present. 

=over 5

=item :all

Imports C<bunzip2> and C<$Bunzip2Error>.
Same as doing this

    use IO::Uncompress::Bunzip2 qw(bunzip2 $Bunzip2Error) ;

=back

=head1 EXAMPLES

=head2 Working with Net::FTP

See L<IO::Uncompress::Bunzip2::FAQ|IO::Uncompress::Bunzip2::FAQ/"Compressed files and Net::FTP">

=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::Compress::Lzop>, L<IO::Uncompress::UnLzop>, L<IO::Compress::Lzf>, L<IO::Uncompress::UnLzf>, L<IO::Uncompress::AnyInflate>, L<IO::Uncompress::AnyUncompress>

L<Compress::Zlib::FAQ|Compress::Zlib::FAQ>

L<File::GlobMapper|File::GlobMapper>, L<Archive::Zip|Archive::Zip>,
L<Archive::Tar|Archive::Tar>,
L<IO::Zlib|IO::Zlib>

The primary site for the bzip2 program is F<http://www.bzip.org>.

See the module L<Compress::Bzip2|Compress::Bzip2>

=head1 AUTHOR

This module was written by Paul Marquess, F<pmqs@cpan.org>. 

=head1 MODIFICATION HISTORY

See the Changes file.

=head1 COPYRIGHT AND LICENSE

Copyright (c) 2005-2008 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     �siZ�wj�r  �r    Uncompress/AnyUncompress.pmnu �[���        package IO::Uncompress::AnyUncompress ;

use strict;
use warnings;
use bytes;

use IO::Compress::Base::Common 2.061 ();

use IO::Uncompress::Base 2.061 ;


require Exporter ;

our ($VERSION, @ISA, @EXPORT_OK, %EXPORT_TAGS, $AnyUncompressError);

$VERSION = '2.061';
$AnyUncompressError = '';

@ISA = qw( Exporter IO::Uncompress::Base );
@EXPORT_OK = qw( $AnyUncompressError anyuncompress ) ;
%EXPORT_TAGS = %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.

BEGIN
{
   eval ' use IO::Uncompress::Adapter::Inflate 2.061 ;';
   eval ' use IO::Uncompress::Adapter::Bunzip2 2.061 ;';
   eval ' use IO::Uncompress::Adapter::LZO 2.061 ;';
   eval ' use IO::Uncompress::Adapter::Lzf 2.061 ;';
   eval ' use IO::Uncompress::Adapter::UnLzma 2.061 ;';
   eval ' use IO::Uncompress::Adapter::UnXz 2.061 ;';

   eval ' use IO::Uncompress::Bunzip2 2.061 ;';
   eval ' use IO::Uncompress::UnLzop 2.061 ;';
   eval ' use IO::Uncompress::Gunzip 2.061 ;';
   eval ' use IO::Uncompress::Inflate 2.061 ;';
   eval ' use IO::Uncompress::RawInflate 2.061 ;';
   eval ' use IO::Uncompress::Unzip 2.061 ;';
   eval ' use IO::Uncompress::UnLzf 2.061 ;';
   eval ' use IO::Uncompress::UnLzma 2.061 ;';
   eval ' use IO::Uncompress::UnXz 2.061 ;';
}

sub new
{
    my $class = shift ;
    my $obj = IO::Compress::Base::Common::createSelfTiedObject($class, \$AnyUncompressError);
    $obj->_create(undef, 0, @_);
}

sub anyuncompress
{
    my $obj = IO::Compress::Base::Common::createSelfTiedObject(undef, \$AnyUncompressError);
    return $obj->_inf(@_) ;
}

sub getExtraParams
{ 
    return ( 'rawinflate' => [IO::Compress::Base::Common::Parse_boolean,  0] ,
             'unlzma'     => [IO::Compress::Base::Common::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 $magic ;

    # try zlib first
    if (defined $IO::Uncompress::RawInflate::VERSION )
    {
        my ($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 $got->getValue('rawinflate');

        $magic = $self->ckMagic( @possible );
        
        if ($magic) {
            *$self->{Info} = $self->readHeader($magic)
                or return undef ;

            return 1;
        }
     }

    if (defined $IO::Uncompress::UnLzma::VERSION && $got->getValue('unlzma'))
    {
        my ($obj, $errstr, $errno) = IO::Uncompress::Adapter::UnLzma::mkUncompObject();

        return $self->saveErrorString(undef, $errstr, $errno)
            if ! defined $obj;

        *$self->{Uncomp} = $obj;
        
        my @possible = qw( UnLzma );
        #unshift @possible, 'RawInflate' 
        #    if $got->getValue('rawinflate');

        if ( *$self->{Info} = $self->ckMagic( @possible ))
        {
            return 1;
        }
     }

     if (defined $IO::Uncompress::UnXz::VERSION and
         $magic = $self->ckMagic('UnXz')) {
        *$self->{Info} = $self->readHeader($magic)
            or return undef ;

        my ($obj, $errstr, $errno) =
            IO::Uncompress::Adapter::UnXz::mkUncompObject();

        return $self->saveErrorString(undef, $errstr, $errno)
            if ! defined $obj;

        *$self->{Uncomp} = $obj;

         return 1;
     }

     if (defined $IO::Uncompress::Bunzip2::VERSION and
         $magic = $self->ckMagic('Bunzip2')) {
        *$self->{Info} = $self->readHeader($magic)
            or return undef ;

        my ($obj, $errstr, $errno) = IO::Uncompress::Adapter::Bunzip2::mkUncompObject();

        return $self->saveErrorString(undef, $errstr, $errno)
            if ! defined $obj;

        *$self->{Uncomp} = $obj;

         return 1;
     }

     if (defined $IO::Uncompress::UnLzop::VERSION and
            $magic = $self->ckMagic('UnLzop')) {

        *$self->{Info} = $self->readHeader($magic)
            or return undef ;

        my ($obj, $errstr, $errno) = IO::Uncompress::Adapter::LZO::mkUncompObject();

        return $self->saveErrorString(undef, $errstr, $errno)
            if ! defined $obj;

        *$self->{Uncomp} = $obj;

         return 1;
     }

     if (defined $IO::Uncompress::UnLzf::VERSION and
            $magic = $self->ckMagic('UnLzf')) {

        *$self->{Info} = $self->readHeader($magic)
            or return undef ;

        my ($obj, $errstr, $errno) = IO::Uncompress::Adapter::Lzf::mkUncompObject();

        return $self->saveErrorString(undef, $errstr, $errno)
            if ! defined $obj;

        *$self->{Uncomp} = $obj;

         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::AnyUncompress - Uncompress gzip, zip, bzip2 or lzop file/buffer

=head1 SYNOPSIS

    use IO::Uncompress::AnyUncompress qw(anyuncompress $AnyUncompressError) ;

    my $status = anyuncompress $input => $output [,OPTS]
        or die "anyuncompress failed: $AnyUncompressError\n";

    my $z = new IO::Uncompress::AnyUncompress $input [OPTS] 
        or die "anyuncompress failed: $AnyUncompressError\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()

    $AnyUncompressError ;

    # 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 with a variety of compression
libraries.

The formats supported are:

=over 5

=item RFC 1950

=item RFC 1951 (optionally)

=item gzip (RFC 1952)

=item zip

=item bzip2

=item lzop

=item lzf

=item lzma

=item xz

=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<anyuncompress>, 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::AnyUncompress qw(anyuncompress $AnyUncompressError) ;

    anyuncompress $input_filename_or_reference => $output_filename_or_reference [,OPTS] 
        or die "anyuncompress failed: $AnyUncompressError\n";

The functional interface needs Perl5.005 or better.

=head2 anyuncompress $input_filename_or_reference => $output_filename_or_reference [, OPTS]

C<anyuncompress> expects at least two parameters,
C<$input_filename_or_reference> and C<$output_filename_or_reference>.

=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 <$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<anyuncompress> 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<anyuncompress> 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

Unless specified below, the optional parameters for C<anyuncompress>,
C<OPTS>, are the same as those used with the OO interface defined in the
L</"Constructor Options"> section below.

=over 5

=item C<< AutoClose => 0|1 >>

This option applies to any input or output data streams to 
C<anyuncompress> 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<anyuncompress> has
completed.

This parameter defaults to 0.

=item C<< BinModeOut => 0|1 >>

When writing to a file or filehandle, set C<binmode> before writing to the
file.

Defaults to 0.

=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::AnyUncompress qw(anyuncompress $AnyUncompressError) ;

    my $input = "file1.txt.Compressed";
    my $output = "file1.txt";
    anyuncompress $input => $output
        or die "anyuncompress failed: $AnyUncompressError\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::AnyUncompress qw(anyuncompress $AnyUncompressError) ;
    use IO::File ;

    my $input = new IO::File "<file1.txt.Compressed"
        or die "Cannot open 'file1.txt.Compressed': $!\n" ;
    my $buffer ;
    anyuncompress $input => \$buffer 
        or die "anyuncompress failed: $AnyUncompressError\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::AnyUncompress qw(anyuncompress $AnyUncompressError) ;

    anyuncompress '</my/home/*.txt.Compressed>' => '</my/home/#1.txt>'
        or die "anyuncompress failed: $AnyUncompressError\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::AnyUncompress qw(anyuncompress $AnyUncompressError) ;

    for my $input ( glob "/my/home/*.txt.Compressed" )
    {
        my $output = $input;
        $output =~ s/.Compressed// ;
        anyuncompress $input => $output 
            or die "Error compressing '$input': $AnyUncompressError\n";
    }

=head1 OO Interface

=head2 Constructor

The format of the constructor for IO::Uncompress::AnyUncompress is shown below

    my $z = new IO::Uncompress::AnyUncompress $input [OPTS]
        or die "IO::Uncompress::AnyUncompress failed: $AnyUncompressError\n";

Returns an C<IO::Uncompress::AnyUncompress> object on success and undef on failure.
The variable C<$AnyUncompressError> will contain an error message on failure.

If you are running Perl 5.005 or better the object, C<$z>, returned from
IO::Uncompress::AnyUncompress can be used exactly like an L<IO::File|IO::File> filehandle.
This means that all normal input file operations can be carried out with
C<$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::AnyUncompress 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::AnyUncompress 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.

=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<< UnLzma => 0|1 >>

When auto-detecting the compressed format, try to test for lzma_alone
content using the C<IO::Uncompress::UnLzma> module. 

The reason this is not default behaviour is because lzma_alone content can
only be detected by attempting to uncompress it. This process is error
prone and can result is false positives.

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 the 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 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
ucompressed 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 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::AnyUncompress 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::AnyUncompress
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 this IO::Uncompress::AnyUncompress at present. 

=over 5

=item :all

Imports C<anyuncompress> and C<$AnyUncompressError>.
Same as doing this

    use IO::Uncompress::AnyUncompress qw(anyuncompress $AnyUncompressError) ;

=back

=head1 EXAMPLES

=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::Lzop>, L<IO::Uncompress::UnLzop>, L<IO::Compress::Lzf>, L<IO::Uncompress::UnLzf>, L<IO::Uncompress::AnyInflate>

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, F<pmqs@cpan.org>. 

=head1 MODIFICATION HISTORY

See the Changes file.

=head1 COPYRIGHT AND LICENSE

Copyright (c) 2005-2013 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     �siZ�bI�m  m    Uncompress/AnyInflate.pmnu �[���        package IO::Uncompress::AnyInflate ;

# for RFC1950, RFC1951 or RFC1952

use strict;
use warnings;
use bytes;

use IO::Compress::Base::Common  2.061 ();

use IO::Uncompress::Adapter::Inflate  2.061 ();


use IO::Uncompress::Base  2.061 ;
use IO::Uncompress::Gunzip  2.061 ;
use IO::Uncompress::Inflate  2.061 ;
use IO::Uncompress::RawInflate  2.061 ;
use IO::Uncompress::Unzip  2.061 ;

require Exporter ;

our ($VERSION, @ISA, @EXPORT_OK, %EXPORT_TAGS, $AnyInflateError);

$VERSION = '2.061';
$AnyInflateError = '';

@ISA = qw( Exporter IO::Uncompress::Base );
@EXPORT_OK = qw( $AnyInflateError anyinflate ) ;
%EXPORT_TAGS = %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
{
    use IO::Compress::Base::Common  2.061 qw(:Parse);
    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 = new IO::Uncompress::AnyInflate $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>.

=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 <$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

Unless specified below, the optional parameters for C<anyinflate>,
C<OPTS>, are the same as those used with the OO interface defined in the
L</"Constructor Options"> section 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 >>

When writing to a file or filehandle, set C<binmode> before writing to the
file.

Defaults to 0.

=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 = new IO::File "<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 = new IO::Uncompress::AnyInflate $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 the 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 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
ucompressed 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 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 this 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 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::Lzop>, L<IO::Uncompress::UnLzop>, L<IO::Compress::Lzf>, L<IO::Uncompress::UnLzf>, 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 
F<http://www.faqs.org/rfcs/rfc1950.html>,
F<http://www.faqs.org/rfcs/rfc1951.html> and
F<http://www.faqs.org/rfcs/rfc1952.html>

The I<zlib> compression library was written by Jean-loup Gailly
F<gzip@prep.ai.mit.edu> and Mark Adler F<madler@alumni.caltech.edu>.

The primary site for the I<zlib> compression library is
F<http://www.zlib.org>.

The primary site for gzip is F<http://www.gzip.org>.

=head1 AUTHOR

This module was written by Paul Marquess, F<pmqs@cpan.org>. 

=head1 MODIFICATION HISTORY

See the Changes file.

=head1 COPYRIGHT AND LICENSE

Copyright (c) 2005-2013 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     �siZ�,Z��  �    Uncompress/Adapter/Bunzip2.pmnu �[���        package IO::Uncompress::Adapter::Bunzip2;

use strict;
use warnings;
use bytes;

use IO::Compress::Base::Common 2.061 qw(:Status);

use Compress::Raw::Bzip2 2.061 ;

our ($VERSION, @ISA);
$VERSION = '2.061';

sub mkUncompObject
{
    my $small     = shift || 0;
    my $verbosity = shift || 0;

    my ($inflate, $status) = new Compress::Raw::Bunzip2(1, 1, $small, $verbosity, 1);

    return (undef, "Could not create Inflation object: $status", $status)
        if $status != BZ_OK ;

    return bless {'Inf'           => $inflate,
                  'CompSize'      => 0,
                  'UnCompSize'    => 0,
                  'Error'         => '',
                  'ConsumesInput' => 1,
                 }  ;     
    
}

sub uncompr
{
    my $self = shift ;
    my $from = shift ;
    my $to   = shift ;
    my $eof  = shift ;

    my $inf   = $self->{Inf};

    my $status = $inf->bzinflate($from, $to);
    $self->{ErrorNo} = $status;

    if ($status != BZ_OK && $status != BZ_STREAM_END )
    {
        $self->{Error} = "Inflation Error: $status";
        return STATUS_ERROR;
    }

    
    return STATUS_OK        if $status == BZ_OK ;
    return STATUS_ENDSTREAM if $status == BZ_STREAM_END ;
    return STATUS_ERROR ;
}


sub reset
{
    my $self = shift ;

    my ($inf, $status) = new Compress::Raw::Bunzip2();
    $self->{ErrorNo} = ($status == BZ_OK) ? 0 : $status ;

    if ($status != BZ_OK)
    {
        $self->{Error} = "Cannot create Inflate object: $status"; 
        return STATUS_ERROR;
    }

    $self->{Inf} = $inf;

    return STATUS_OK ;
}

sub compressedBytes
{
    my $self = shift ;
    $self->{Inf}->compressedBytes();
}

sub uncompressedBytes
{
    my $self = shift ;
    $self->{Inf}->uncompressedBytes();
}

sub crc32
{
    my $self = shift ;
    #$self->{Inf}->crc32();
}

sub adler32
{
    my $self = shift ;
    #$self->{Inf}->adler32();
}

sub sync
{
    my $self = shift ;
    #( $self->{Inf}->inflateSync(@_) == BZ_OK) 
    #        ? STATUS_OK 
    #        : STATUS_ERROR ;
}


1;

__END__

PK     �siZ(�.��  �    Uncompress/Adapter/Identity.pmnu �[���        package IO::Uncompress::Adapter::Identity;

use warnings;
use strict;
use bytes;

use IO::Compress::Base::Common  2.061 qw(:Status);
use IO::Compress::Zip::Constants ;

our ($VERSION);

$VERSION = '2.061';

use Compress::Raw::Zlib  2.061 ();

sub mkUncompObject
{
    my $streaming = shift;
    my $zip64 = shift;

    my $crc32 = 1; #shift ;
    my $adler32 = shift;

    bless { 'CompSize'   => new U64 , # 0,
            'UnCompSize' => 0,
            'wantCRC32'  => $crc32,
            'CRC32'      => Compress::Raw::Zlib::crc32(''),
            'wantADLER32'=> $adler32,
            'ADLER32'    => Compress::Raw::Zlib::adler32(''),
            'ConsumesInput' => 1,
            'Streaming'  => $streaming,
            'Zip64'      => $zip64,
            'DataHdrSize'  => $zip64 ? 24 :  16,
            'Pending'   => '',

          } ;
}


sub uncompr
{
    my $self = shift;
    my $in = $_[0];
    my $eof = $_[2];

    my $len = length $$in;
    my $remainder = '';

    if (defined $$in && $len) {

        if ($self->{Streaming}) {

            if (length $self->{Pending}) {
                $$in = $self->{Pending} . $$in ;
                $len = length $$in;
                $self->{Pending} = '';
            }

            my $ind = index($$in, "\x50\x4b\x07\x08");

            if ($ind < 0) {
                $len = length $$in;
                if ($len >= 3 && substr($$in, -3) eq "\x50\x4b\x07") {
                    $ind = $len - 3 ;
                }
                elsif ($len >= 2 && substr($$in, -2) eq "\x50\x4b") {
                    $ind = $len - 2 ;
                }
                elsif ($len >= 1 && substr($$in, -1) eq "\x50") {
                    $ind = $len - 1 ;
                }
            }
           
            if ($ind >= 0) {
                $remainder = substr($$in, $ind) ;
                substr($$in, $ind) = '' ;
            }
        }

        if (length $remainder && length $remainder < $self->{DataHdrSize}) {
            $self->{Pending} = $remainder ;
            $remainder = '';
        }
        elsif (length $remainder >= $self->{DataHdrSize}) {
            my $crc = unpack "V", substr($remainder, 4);
            if ($crc == Compress::Raw::Zlib::crc32($$in,  $self->{CRC32})) {
                my ($l1, $l2) ;

                if ($self->{Zip64}) {
                    $l1 = U64::newUnpack_V64(substr($remainder, 8));
                    $l2 = U64::newUnpack_V64(substr($remainder, 16));
                }
                else {
                    $l1 = U64::newUnpack_V32(substr($remainder, 8));
                    $l2 = U64::newUnpack_V32(substr($remainder, 12));
                }
                    
                my $newLen = $self->{CompSize}->clone();
                $newLen->add(length $$in);
                if ($l1->equal($l2) && $l1->equal($newLen) ) {
                    $eof = 1;
                }
                else {
                    $$in .= substr($remainder, 0, 4) ;
                    $remainder       = substr($remainder, 4);
                    #$self->{Pending} = substr($remainder, 4);
                    #$remainder = '';
                    $eof = 0;
                }
            }
            else {
                $$in .= substr($remainder, 0, 4) ;
                $remainder       = substr($remainder, 4);
                #$self->{Pending} = substr($remainder, 4);
                #$remainder = '';
                $eof = 0;
            }
        }

        if (length $$in) {
            $self->{CompSize}->add(length $$in) ;

            $self->{CRC32} = Compress::Raw::Zlib::crc32($$in,  $self->{CRC32})
                if $self->{wantCRC32};

            $self->{ADLER32} = Compress::Zlib::adler32($$in,  $self->{ADLER32})
                if $self->{wantADLER32};
        }

        ${ $_[1] } .= $$in;
        $$in  = $remainder;
    }

    return STATUS_ENDSTREAM if $eof;
    return STATUS_OK ;
}

sub reset
{
    my $self = shift;

    $self->{CompSize}   = 0;
    $self->{UnCompSize} = 0;
    $self->{CRC32}      = Compress::Raw::Zlib::crc32('');
    $self->{ADLER32}    = Compress::Raw::Zlib::adler32('');      

    return STATUS_OK ;
}

#sub count
#{
#    my $self = shift ;
#    return $self->{UnCompSize} ;
#}

sub compressedBytes
{
    my $self = shift ;
    return $self->{CompSize} ;
}

sub uncompressedBytes
{
    my $self = shift ;
    return $self->{CompSize} ;
}

sub sync
{
    return STATUS_OK ;
}

sub crc32
{
    my $self = shift ;
    return $self->{CRC32};
}

sub adler32
{
    my $self = shift ;
    return $self->{ADLER32};
}


1;

__END__
PK     �siZ���  �    Uncompress/Adapter/Inflate.pmnu �[���        package IO::Uncompress::Adapter::Inflate;

use strict;
use warnings;
#use bytes;

use IO::Compress::Base::Common  2.061 qw(:Status);
use Compress::Raw::Zlib  2.061 qw(Z_OK Z_BUF_ERROR Z_STREAM_END Z_FINISH MAX_WBITS);

our ($VERSION);
$VERSION = '2.061';


sub mkUncompObject
{
    my $crc32   = shift || 1;
    my $adler32 = shift || 1;
    my $scan    = shift || 0;

    my $inflate ;
    my $status ;

    if ($scan)
    {
        ($inflate, $status) = new Compress::Raw::Zlib::InflateScan
                                    #LimitOutput  => 1,
                                    CRC32        => $crc32,
                                    ADLER32      => $adler32,
                                    WindowBits   => - MAX_WBITS ;
    }
    else
    {
        ($inflate, $status) = new Compress::Raw::Zlib::Inflate
                                    AppendOutput => 1,
                                    LimitOutput  => 1,
                                    CRC32        => $crc32,
                                    ADLER32      => $adler32,
                                    WindowBits   => - MAX_WBITS ;
    }

    return (undef, "Could not create Inflation object: $status", $status) 
        if $status != Z_OK ;

    return bless {'Inf'        => $inflate,
                  'CompSize'   => 0,
                  'UnCompSize' => 0,
                  'Error'      => '',
                  'ConsumesInput' => 1,
                 } ;     
    
}

sub uncompr
{
    my $self = shift ;
    my $from = shift ;
    my $to   = shift ;
    my $eof  = shift ;

    my $inf   = $self->{Inf};

    my $status = $inf->inflate($from, $to, $eof);
    $self->{ErrorNo} = $status;

    if ($status != Z_OK && $status != Z_STREAM_END && $status != Z_BUF_ERROR)
    {
        $self->{Error} = "Inflation Error: $status";
        return STATUS_ERROR;
    }
            
    return STATUS_OK        if $status == Z_BUF_ERROR ; # ???
    return STATUS_OK        if $status == Z_OK ;
    return STATUS_ENDSTREAM if $status == Z_STREAM_END ;
    return STATUS_ERROR ;
}

sub reset
{
    my $self = shift ;
    $self->{Inf}->inflateReset();

    return STATUS_OK ;
}

#sub count
#{
#    my $self = shift ;
#    $self->{Inf}->inflateCount();
#}

sub crc32
{
    my $self = shift ;
    $self->{Inf}->crc32();
}

sub compressedBytes
{
    my $self = shift ;
    $self->{Inf}->compressedBytes();
}

sub uncompressedBytes
{
    my $self = shift ;
    $self->{Inf}->uncompressedBytes();
}

sub adler32
{
    my $self = shift ;
    $self->{Inf}->adler32();
}

sub sync
{
    my $self = shift ;
    ( $self->{Inf}->inflateSync(@_) == Z_OK) 
            ? STATUS_OK 
            : STATUS_ERROR ;
}


sub getLastBlockOffset
{
    my $self = shift ;
    $self->{Inf}->getLastBlockOffset();
}

sub getEndOffset
{
    my $self = shift ;
    $self->{Inf}->getEndOffset();
}

sub resetLastBlockByte
{
    my $self = shift ;
    $self->{Inf}->resetLastBlockByte(@_);
}

sub createDeflateStream
{
    my $self = shift ;
    my $deflate = $self->{Inf}->createDeflateStream(@_);
    return bless {'Def'        => $deflate,
                  'CompSize'   => 0,
                  'UnCompSize' => 0,
                  'Error'      => '',
                 }, 'IO::Compress::Adapter::Deflate';
}

1;


__END__

PK     �siZ����z{  z{    Uncompress/RawInflate.pmnu �[���        package IO::Uncompress::RawInflate ;
# for RFC1951

use strict ;
use warnings;
#use bytes;

use Compress::Raw::Zlib  2.061 ;
use IO::Compress::Base::Common  2.061 qw(:Status );

use IO::Uncompress::Base  2.061 ;
use IO::Uncompress::Adapter::Inflate  2.061 ;

require Exporter ;
our ($VERSION, @ISA, @EXPORT_OK, %EXPORT_TAGS, %DEFLATE_CONSTANTS, $RawInflateError);

$VERSION = '2.061';
$RawInflateError = '';

@ISA    = qw( Exporter IO::Uncompress::Base );
@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 = new IO::Uncompress::RawInflate $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>.

=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 <$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

Unless specified below, the optional parameters for C<rawinflate>,
C<OPTS>, are the same as those used with the OO interface defined in the
L</"Constructor Options"> section 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 >>

When writing to a file or filehandle, set C<binmode> before writing to the
file.

Defaults to 0.

=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 = new IO::File "<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 = new IO::Uncompress::RawInflate $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 the 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 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
ucompressed 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 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 this 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 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::Lzop>, L<IO::Uncompress::UnLzop>, L<IO::Compress::Lzf>, L<IO::Uncompress::UnLzf>, 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 
F<http://www.faqs.org/rfcs/rfc1950.html>,
F<http://www.faqs.org/rfcs/rfc1951.html> and
F<http://www.faqs.org/rfcs/rfc1952.html>

The I<zlib> compression library was written by Jean-loup Gailly
F<gzip@prep.ai.mit.edu> and Mark Adler F<madler@alumni.caltech.edu>.

The primary site for the I<zlib> compression library is
F<http://www.zlib.org>.

The primary site for gzip is F<http://www.gzip.org>.

=head1 AUTHOR

This module was written by Paul Marquess, F<pmqs@cpan.org>. 

=head1 MODIFICATION HISTORY

See the Changes file.

=head1 COPYRIGHT AND LICENSE

Copyright (c) 2005-2013 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     �siZW����  ��    Uncompress/Base.pmnu �[���        
package IO::Uncompress::Base ;

use strict ;
use warnings;
#use bytes;

our (@ISA, $VERSION, @EXPORT_OK, %EXPORT_TAGS);
@ISA    = qw(Exporter IO::File);


$VERSION = '2.061';

use constant G_EOF => 0 ;
use constant G_ERR => -1 ;

use IO::Compress::Base::Common 2.061 ;

use IO::File ;
use Symbol;
use Scalar::Util ();
use List::Util ();
use Carp ;

%EXPORT_TAGS = ( );
push @{ $EXPORT_TAGS{all} }, @EXPORT_OK ;

sub smartRead
{
    my $self = $_[0];
    my $out = $_[1];
    my $size = $_[2];
    $$out = "" ;

    my $offset = 0 ;
    my $status = 1;


    if (defined *$self->{InputLength}) {
        return 0
            if *$self->{InputLengthRemaining} <= 0 ;
        $size = List::Util::min($size, *$self->{InputLengthRemaining});
    }

    if ( length *$self->{Prime} ) {
        $$out = substr(*$self->{Prime}, 0, $size) ;
        substr(*$self->{Prime}, 0, $size) =  '' ;
        if (length $$out == $size) {
            *$self->{InputLengthRemaining} -= length $$out
                if defined *$self->{InputLength};

            return length $$out ;
        }
        $offset = length $$out ;
    }

    my $get_size = $size - $offset ;

    if (defined *$self->{FH}) {
        if ($offset) {
            # Not using this 
            #
            #  *$self->{FH}->read($$out, $get_size, $offset);
            #
            # because the filehandle may not support the offset parameter
            # An example is Net::FTP
            my $tmp = '';
            $status = *$self->{FH}->read($tmp, $get_size) ;
            substr($$out, $offset) = $tmp
                if defined $status && $status > 0 ;
        }
        else
          { $status = *$self->{FH}->read($$out, $get_size) }
    }
    elsif (defined *$self->{InputEvent}) {
        my $got = 1 ;
        while (length $$out < $size) {
            last 
                if ($got = *$self->{InputEvent}->($$out, $get_size)) <= 0;
        }

        if (length $$out > $size ) {
            *$self->{Prime} = substr($$out, $size, length($$out));
            substr($$out, $size, length($$out)) =  '';
        }

       *$self->{EventEof} = 1 if $got <= 0 ;
    }
    else {
       no warnings 'uninitialized';
       my $buf = *$self->{Buffer} ;
       $$buf = '' unless defined $$buf ;
       substr($$out, $offset) = substr($$buf, *$self->{BufferOffset}, $get_size);
       if (*$self->{ConsumeInput})
         { substr($$buf, 0, $get_size) = '' }
       else  
         { *$self->{BufferOffset} += length($$out) - $offset }
    }

    *$self->{InputLengthRemaining} -= length($$out) #- $offset 
        if defined *$self->{InputLength};
        
    if (! defined $status) {
        $self->saveStatus($!) ;
        return STATUS_ERROR;
    }

    $self->saveStatus(length $$out < 0 ? STATUS_ERROR : STATUS_OK) ;

    return length $$out;
}

sub pushBack
{
    my $self = shift ;

    return if ! defined $_[0] || length $_[0] == 0 ;

    if (defined *$self->{FH} || defined *$self->{InputEvent} ) {
        *$self->{Prime} = $_[0] . *$self->{Prime} ;
        *$self->{InputLengthRemaining} += length($_[0]);
    }
    else {
        my $len = length $_[0];

        if($len > *$self->{BufferOffset}) {
            *$self->{Prime} = substr($_[0], 0, $len - *$self->{BufferOffset}) . *$self->{Prime} ;
            *$self->{InputLengthRemaining} = *$self->{InputLength};
            *$self->{BufferOffset} = 0
        }
        else {
            *$self->{InputLengthRemaining} += length($_[0]);
            *$self->{BufferOffset} -= length($_[0]) ;
        }
    }
}

sub smartSeek
{
    my $self   = shift ;
    my $offset = shift ;
    my $truncate = shift;
    my $position = shift || SEEK_SET;

    # TODO -- need to take prime into account
    if (defined *$self->{FH})
      { *$self->{FH}->seek($offset, $position) }
    else {
        if ($position == SEEK_END) {
            *$self->{BufferOffset} = length ${ *$self->{Buffer} } + $offset ;
        }
        elsif ($position == SEEK_CUR) {
            *$self->{BufferOffset} += $offset ;
        }
        else {
            *$self->{BufferOffset} = $offset ;
        }

        substr(${ *$self->{Buffer} }, *$self->{BufferOffset}) = ''
            if $truncate;
        return 1;
    }
}

sub smartTell
{
    my $self   = shift ;

    if (defined *$self->{FH})
      { return *$self->{FH}->tell() }
    else 
      { return *$self->{BufferOffset} }
}

sub smartWrite
{
    my $self   = shift ;
    my $out_data = shift ;

    if (defined *$self->{FH}) {
        # flush needed for 5.8.0 
        defined *$self->{FH}->write($out_data, length $out_data) &&
        defined *$self->{FH}->flush() ;
    }
    else {
       my $buf = *$self->{Buffer} ;
       substr($$buf, *$self->{BufferOffset}, length $out_data) = $out_data ;
       *$self->{BufferOffset} += length($out_data) ;
       return 1;
    }
}

sub smartReadExact
{
    return $_[0]->smartRead($_[1], $_[2]) == $_[2];
}

sub smartEof
{
    my ($self) = $_[0];
    local $.; 

    return 0 if length *$self->{Prime} || *$self->{PushMode};

    if (defined *$self->{FH})
    {
        # Could use
        #
        #  *$self->{FH}->eof() 
        #
        # here, but this can cause trouble if
        # the filehandle is itself a tied handle, but it uses sysread.
        # Then we get into mixing buffered & non-buffered IO, 
        # which will cause trouble

        my $info = $self->getErrInfo();
        
        my $buffer = '';
        my $status = $self->smartRead(\$buffer, 1);
        $self->pushBack($buffer) if length $buffer;
        $self->setErrInfo($info);

        return $status == 0 ;
    }
    elsif (defined *$self->{InputEvent})
     { *$self->{EventEof} }
    else 
     { *$self->{BufferOffset} >= length(${ *$self->{Buffer} }) }
}

sub clearError
{
    my $self   = shift ;

    *$self->{ErrorNo}  =  0 ;
    ${ *$self->{Error} } = '' ;
}

sub getErrInfo
{
    my $self   = shift ;

    return [ *$self->{ErrorNo}, ${ *$self->{Error} } ] ;
}

sub setErrInfo
{
    my $self   = shift ;
    my $ref    = shift;

    *$self->{ErrorNo}  =  $ref->[0] ;
    ${ *$self->{Error} } = $ref->[1] ;
}

sub saveStatus
{
    my $self   = shift ;
    my $errno = shift() + 0 ;

    *$self->{ErrorNo}  = $errno;
    ${ *$self->{Error} } = '' ;

    return *$self->{ErrorNo} ;
}


sub saveErrorString
{
    my $self   = shift ;
    my $retval = shift ;

    ${ *$self->{Error} } = shift ;
    *$self->{ErrorNo} = @_ ? shift() + 0 : STATUS_ERROR ;

    return $retval;
}

sub croakError
{
    my $self   = shift ;
    $self->saveErrorString(0, $_[0]);
    croak $_[0];
}


sub closeError
{
    my $self = shift ;
    my $retval = shift ;

    my $errno = *$self->{ErrorNo};
    my $error = ${ *$self->{Error} };

    $self->close();

    *$self->{ErrorNo} = $errno ;
    ${ *$self->{Error} } = $error ;

    return $retval;
}

sub error
{
    my $self   = shift ;
    return ${ *$self->{Error} } ;
}

sub errorNo
{
    my $self   = shift ;
    return *$self->{ErrorNo};
}

sub HeaderError
{
    my ($self) = shift;
    return $self->saveErrorString(undef, "Header Error: $_[0]", STATUS_ERROR);
}

sub TrailerError
{
    my ($self) = shift;
    return $self->saveErrorString(G_ERR, "Trailer Error: $_[0]", STATUS_ERROR);
}

sub TruncatedHeader
{
    my ($self) = shift;
    return $self->HeaderError("Truncated in $_[0] Section");
}

sub TruncatedTrailer
{
    my ($self) = shift;
    return $self->TrailerError("Truncated in $_[0] Section");
}

sub postCheckParams
{
    return 1;
}

sub checkParams
{
    my $self = shift ;
    my $class = shift ;

    my $got = shift || IO::Compress::Base::Parameters::new();
    
    my $Valid = {
                    'blocksize'     => [IO::Compress::Base::Common::Parse_unsigned, 16 * 1024],
                    'autoclose'     => [IO::Compress::Base::Common::Parse_boolean,  0],
                    'strict'        => [IO::Compress::Base::Common::Parse_boolean,  0],
                    'append'        => [IO::Compress::Base::Common::Parse_boolean,  0],
                    'prime'         => [IO::Compress::Base::Common::Parse_any,      undef],
                    'multistream'   => [IO::Compress::Base::Common::Parse_boolean,  0],
                    'transparent'   => [IO::Compress::Base::Common::Parse_any,      1],
                    'scan'          => [IO::Compress::Base::Common::Parse_boolean,  0],
                    'inputlength'   => [IO::Compress::Base::Common::Parse_unsigned, undef],
                    'binmodeout'    => [IO::Compress::Base::Common::Parse_boolean,  0],
                   #'decode'        => [IO::Compress::Base::Common::Parse_any,      undef],

                   #'consumeinput'  => [IO::Compress::Base::Common::Parse_boolean,  0],
                   
                    $self->getExtraParams(),

                    #'Todo - Revert to ordinary file on end Z_STREAM_END'=> 0,
                    # ContinueAfterEof
                } ;

    $Valid->{trailingdata} = [IO::Compress::Base::Common::Parse_writable_scalar, undef]
        if  *$self->{OneShot} ;
        
    $got->parse($Valid, @_ ) 
        or $self->croakError("${class}: " . $got->getError()) ;

    $self->postCheckParams($got) 
        or $self->croakError("${class}: " . $self->error()) ;

    return $got;
}

sub _create
{
    my $obj = shift;
    my $got = shift;
    my $append_mode = shift ;

    my $class = ref $obj;
    $obj->croakError("$class: Missing Input parameter")
        if ! @_ && ! $got ;

    my $inValue = shift ;

    *$obj->{OneShot} = 0 ;

    if (! $got)
    {
        $got = $obj->checkParams($class, undef, @_)
            or return undef ;
    }

    my $inType  = whatIsInput($inValue, 1);

    $obj->ckInputParam($class, $inValue, 1) 
        or return undef ;

    *$obj->{InNew} = 1;

    $obj->ckParams($got)
        or $obj->croakError("${class}: " . *$obj->{Error});

    if ($inType eq 'buffer' || $inType eq 'code') {
        *$obj->{Buffer} = $inValue ;        
        *$obj->{InputEvent} = $inValue 
           if $inType eq 'code' ;
    }
    else {
        if ($inType eq 'handle') {
            *$obj->{FH} = $inValue ;
            *$obj->{Handle} = 1 ;

            # Need to rewind for Scan
            *$obj->{FH}->seek(0, SEEK_SET) 
                if $got->getValue('scan');
        }  
        else {    
            no warnings ;
            my $mode = '<';
            $mode = '+<' if $got->getValue('scan');
            *$obj->{StdIO} = ($inValue eq '-');
            *$obj->{FH} = new IO::File "$mode $inValue"
                or return $obj->saveErrorString(undef, "cannot open file '$inValue': $!", $!) ;
        }
        
        *$obj->{LineNo} = $. = 0;
        setBinModeInput(*$obj->{FH}) ;

        my $buff = "" ;
        *$obj->{Buffer} = \$buff ;
    }

#    if ($got->getValue('decode')) { 
#        my $want_encoding = $got->getValue('decode');
#        *$obj->{Encoding} = IO::Compress::Base::Common::getEncoding($obj, $class, $want_encoding);
#    }
#    else {
#        *$obj->{Encoding} = undef;
#    }

    *$obj->{InputLength}       = $got->parsed('inputlength') 
                                    ? $got->getValue('inputlength')
                                    : undef ;
    *$obj->{InputLengthRemaining} = $got->getValue('inputlength');
    *$obj->{BufferOffset}      = 0 ;
    *$obj->{AutoClose}         = $got->getValue('autoclose');
    *$obj->{Strict}            = $got->getValue('strict');
    *$obj->{BlockSize}         = $got->getValue('blocksize');
    *$obj->{Append}            = $got->getValue('append');
    *$obj->{AppendOutput}      = $append_mode || $got->getValue('append');
    *$obj->{ConsumeInput}      = $got->getValue('consumeinput');
    *$obj->{Transparent}       = $got->getValue('transparent');
    *$obj->{MultiStream}       = $got->getValue('multistream');

    # TODO - move these two into RawDeflate
    *$obj->{Scan}              = $got->getValue('scan');
    *$obj->{ParseExtra}        = $got->getValue('parseextra') 
                                  || $got->getValue('strict')  ;
    *$obj->{Type}              = '';
    *$obj->{Prime}             = $got->getValue('prime') || '' ;
    *$obj->{Pending}           = '';
    *$obj->{Plain}             = 0;
    *$obj->{PlainBytesRead}    = 0;
    *$obj->{InflatedBytesRead} = 0;
    *$obj->{UnCompSize}        = new U64;
    *$obj->{CompSize}          = new U64;
    *$obj->{TotalInflatedBytesRead} = 0;
    *$obj->{NewStream}         = 0 ;
    *$obj->{EventEof}          = 0 ;
    *$obj->{ClassName}         = $class ;
    *$obj->{Params}            = $got ;

    if (*$obj->{ConsumeInput}) {
        *$obj->{InNew} = 0;
        *$obj->{Closed} = 0;
        return $obj
    }

    my $status = $obj->mkUncomp($got);

    return undef
        unless defined $status;

    *$obj->{InNew} = 0;
    *$obj->{Closed} = 0;

    if ($status) {
        # Need to try uncompressing to catch the case
        # where the compressed file uncompresses to an
        # empty string - so eof is set immediately.
        
        my $out_buffer = '';

        $status = $obj->read(\$out_buffer);
    
        if ($status < 0) {
            *$obj->{ReadStatus} = [ $status, $obj->error(), $obj->errorNo() ];
        }

        $obj->ungetc($out_buffer)
            if length $out_buffer;
    }
    else {
        return undef 
            unless *$obj->{Transparent};

        $obj->clearError();
        *$obj->{Type} = 'plain';
        *$obj->{Plain} = 1;
        $obj->pushBack(*$obj->{HeaderPending})  ;
    }

    push @{ *$obj->{InfoList} }, *$obj->{Info} ;

    $obj->saveStatus(STATUS_OK) ;
    *$obj->{InNew} = 0;
    *$obj->{Closed} = 0;

    return $obj;
}

sub ckInputParam
{
    my $self = shift ;
    my $from = shift ;
    my $inType = whatIsInput($_[0], $_[1]);

    $self->croakError("$from: input parameter not a filename, filehandle, array ref or scalar ref")
        if ! $inType ;

#    if ($inType  eq 'filename' )
#    {
#        return $self->saveErrorString(1, "$from: input filename is undef or null string", STATUS_ERROR)
#            if ! defined $_[0] || $_[0] eq ''  ;
#
#        if ($_[0] ne '-' && ! -e $_[0] )
#        {
#            return $self->saveErrorString(1, 
#                            "input file '$_[0]' does not exist", STATUS_ERROR);
#        }
#    }

    return 1;
}


sub _inf
{
    my $obj = shift ;

    my $class = (caller)[0] ;
    my $name = (caller(1))[3] ;

    $obj->croakError("$name: expected at least 1 parameters\n")
        unless @_ >= 1 ;

    my $input = shift ;
    my $haveOut = @_ ;
    my $output = shift ;


    my $x = new IO::Compress::Base::Validator($class, *$obj->{Error}, $name, $input, $output)
        or return undef ;
    
    push @_, $output if $haveOut && $x->{Hash};

    *$obj->{OneShot} = 1 ;
    
    my $got = $obj->checkParams($name, undef, @_)
        or return undef ;

    if ($got->parsed('trailingdata'))
    {
#        my $value = $got->valueRef('TrailingData');
#        warn "TD $value ";
#        #$value = $$value;
##                warn "TD $value $$value ";
#       
#        return retErr($obj, "Parameter 'TrailingData' not writable")
#            if readonly $$value ;          
#
#        if (ref $$value) 
#        {
#            return retErr($obj,"Parameter 'TrailingData' not a scalar reference")
#                if ref $$value ne 'SCALAR' ;
#              
#            *$obj->{TrailingData} = $$value ;
#        }
#        else  
#        {
#            return retErr($obj,"Parameter 'TrailingData' not a scalar")
#                if ref $value ne 'SCALAR' ;               
#
#            *$obj->{TrailingData} = $value ;
#        }
        
        *$obj->{TrailingData} = $got->getValue('trailingdata');
    }

    *$obj->{MultiStream} = $got->getValue('multistream');
    $got->setValue('multistream', 0);

    $x->{Got} = $got ;

#    if ($x->{Hash})
#    {
#        while (my($k, $v) = each %$input)
#        {
#            $v = \$input->{$k} 
#                unless defined $v ;
#
#            $obj->_singleTarget($x, $k, $v, @_)
#                or return undef ;
#        }
#
#        return keys %$input ;
#    }
    
    if ($x->{GlobMap})
    {
        $x->{oneInput} = 1 ;
        foreach my $pair (@{ $x->{Pairs} })
        {
            my ($from, $to) = @$pair ;
            $obj->_singleTarget($x, $from, $to, @_)
                or return undef ;
        }

        return scalar @{ $x->{Pairs} } ;
    }

    if (! $x->{oneOutput} )
    {
        my $inFile = ($x->{inType} eq 'filenames' 
                        || $x->{inType} eq 'filename');

        $x->{inType} = $inFile ? 'filename' : 'buffer';
        
        foreach my $in ($x->{oneInput} ? $input : @$input)
        {
            my $out ;
            $x->{oneInput} = 1 ;

            $obj->_singleTarget($x, $in, $output, @_)
                or return undef ;
        }

        return 1 ;
    }

    # finally the 1 to 1 and n to 1
    return $obj->_singleTarget($x, $input, $output, @_);

    croak "should not be here" ;
}

sub retErr
{
    my $x = shift ;
    my $string = shift ;

    ${ $x->{Error} } = $string ;

    return undef ;
}

sub _singleTarget
{
    my $self      = shift ;
    my $x         = shift ;
    my $input     = shift;
    my $output    = shift;
    
    my $buff = '';
    $x->{buff} = \$buff ;

    my $fh ;
    if ($x->{outType} eq 'filename') {
        my $mode = '>' ;
        $mode = '>>'
            if $x->{Got}->getValue('append') ;
        $x->{fh} = new IO::File "$mode $output" 
            or return retErr($x, "cannot open file '$output': $!") ;
        binmode $x->{fh} if $x->{Got}->valueOrDefault('binmodeout');

    }

    elsif ($x->{outType} eq 'handle') {
        $x->{fh} = $output;
        binmode $x->{fh} if $x->{Got}->valueOrDefault('binmodeout');
        if ($x->{Got}->getValue('append')) {
                seek($x->{fh}, 0, SEEK_END)
                    or return retErr($x, "Cannot seek to end of output filehandle: $!") ;
            }
    }

    
    elsif ($x->{outType} eq 'buffer' )
    {
        $$output = '' 
            unless $x->{Got}->getValue('append');
        $x->{buff} = $output ;
    }

    if ($x->{oneInput})
    {
        defined $self->_rd2($x, $input, $output)
            or return undef; 
    }
    else
    {
        for my $element ( ($x->{inType} eq 'hash') ? keys %$input : @$input)
        {
            defined $self->_rd2($x, $element, $output) 
                or return undef ;
        }
    }


    if ( ($x->{outType} eq 'filename' && $output ne '-') || 
         ($x->{outType} eq 'handle' && $x->{Got}->getValue('autoclose'))) {
        $x->{fh}->close() 
            or return retErr($x, $!); 
        delete $x->{fh};
    }

    return 1 ;
}

sub _rd2
{
    my $self      = shift ;
    my $x         = shift ;
    my $input     = shift;
    my $output    = shift;
        
    my $z = IO::Compress::Base::Common::createSelfTiedObject($x->{Class}, *$self->{Error});
    
    $z->_create($x->{Got}, 1, $input, @_)
        or return undef ;

    my $status ;
    my $fh = $x->{fh};
    
    while (1) {

        while (($status = $z->read($x->{buff})) > 0) {
            if ($fh) {
                syswrite $fh, ${ $x->{buff} }
                    or return $z->saveErrorString(undef, "Error writing to output file: $!", $!);
                ${ $x->{buff} } = '' ;
            }
        }

        if (! $x->{oneOutput} ) {
            my $ot = $x->{outType} ;

            if ($ot eq 'array') 
              { push @$output, $x->{buff} }
            elsif ($ot eq 'hash') 
              { $output->{$input} = $x->{buff} }

            my $buff = '';
            $x->{buff} = \$buff;
        }

        last if $status < 0 || $z->smartEof();

        last 
            unless *$self->{MultiStream};

        $status = $z->nextStream();

        last 
            unless $status == 1 ;
    }

    return $z->closeError(undef)
        if $status < 0 ;

    ${ *$self->{TrailingData} } = $z->trailingData()
        if defined *$self->{TrailingData} ;

    $z->close() 
        or return undef ;

    return 1 ;
}

sub TIEHANDLE
{
    return $_[0] if ref($_[0]);
    die "OOPS\n" ;

}
  
sub UNTIE
{
    my $self = shift ;
}


sub getHeaderInfo
{
    my $self = shift ;
    wantarray ? @{ *$self->{InfoList} } : *$self->{Info};
}

sub readBlock
{
    my $self = shift ;
    my $buff = shift ;
    my $size = shift ;

    if (defined *$self->{CompressedInputLength}) {
        if (*$self->{CompressedInputLengthRemaining} == 0) {
            delete *$self->{CompressedInputLength};
            *$self->{CompressedInputLengthDone} = 1;
            return STATUS_OK ;
        }
        $size = List::Util::min($size, *$self->{CompressedInputLengthRemaining} );
        *$self->{CompressedInputLengthRemaining} -= $size ;
    }
    
    my $status = $self->smartRead($buff, $size) ;
    return $self->saveErrorString(STATUS_ERROR, "Error Reading Data: $!", $!)
        if $status == STATUS_ERROR  ;

    if ($status == 0 ) {
        *$self->{Closed} = 1 ;
        *$self->{EndStream} = 1 ;
        return $self->saveErrorString(STATUS_ERROR, "unexpected end of file", STATUS_ERROR);
    }

    return STATUS_OK;
}

sub postBlockChk
{
    return STATUS_OK;
}

sub _raw_read
{
    # return codes
    # >0 - ok, number of bytes read
    # =0 - ok, eof
    # <0 - not ok
    
    my $self = shift ;

    return G_EOF if *$self->{Closed} ;
    return G_EOF if *$self->{EndStream} ;

    my $buffer = shift ;
    my $scan_mode = shift ;

    if (*$self->{Plain}) {
        my $tmp_buff ;
        my $len = $self->smartRead(\$tmp_buff, *$self->{BlockSize}) ;
        
        return $self->saveErrorString(G_ERR, "Error reading data: $!", $!) 
                if $len == STATUS_ERROR ;

        if ($len == 0 ) {
            *$self->{EndStream} = 1 ;
        }
        else {
            *$self->{PlainBytesRead} += $len ;
            $$buffer .= $tmp_buff;
        }

        return $len ;
    }

    if (*$self->{NewStream}) {

        $self->gotoNextStream() > 0
            or return G_ERR;

        # For the headers that actually uncompressed data, put the
        # uncompressed data into the output buffer.
        $$buffer .=  *$self->{Pending} ;
        my $len = length  *$self->{Pending} ;
        *$self->{Pending} = '';
        return $len; 
    }

    my $temp_buf = '';
    my $outSize = 0;
    my $status = $self->readBlock(\$temp_buf, *$self->{BlockSize}, $outSize) ;
    
    return G_ERR
        if $status == STATUS_ERROR  ;

    my $buf_len = 0;
    if ($status == STATUS_OK) {
        my $beforeC_len = length $temp_buf;
        my $before_len = defined $$buffer ? length $$buffer : 0 ;
        $status = *$self->{Uncomp}->uncompr(\$temp_buf, $buffer,
                                    defined *$self->{CompressedInputLengthDone} ||
                                                $self->smartEof(), $outSize);
                                                
        # Remember the input buffer if it wasn't consumed completely
        $self->pushBack($temp_buf) if *$self->{Uncomp}{ConsumesInput};

        return $self->saveErrorString(G_ERR, *$self->{Uncomp}{Error}, *$self->{Uncomp}{ErrorNo})
            if $self->saveStatus($status) == STATUS_ERROR;    

        $self->postBlockChk($buffer, $before_len) == STATUS_OK
            or return G_ERR;

        $buf_len = defined $$buffer ? length($$buffer) - $before_len : 0;
    
        *$self->{CompSize}->add($beforeC_len - length $temp_buf) ;

        *$self->{InflatedBytesRead} += $buf_len ;
        *$self->{TotalInflatedBytesRead} += $buf_len ;
        *$self->{UnCompSize}->add($buf_len) ;

        $self->filterUncompressed($buffer, $before_len);

#        if (*$self->{Encoding}) {
#            use Encode ;
#            *$self->{PendingDecode} .= substr($$buffer, $before_len) ;
#            my $got = *$self->{Encoding}->decode(*$self->{PendingDecode}, Encode::FB_QUIET) ;
#            substr($$buffer, $before_len) = $got;
#        }
    }

    if ($status == STATUS_ENDSTREAM) {

        *$self->{EndStream} = 1 ;

        my $trailer;
        my $trailer_size = *$self->{Info}{TrailerLength} ;
        my $got = 0;
        if (*$self->{Info}{TrailerLength})
        {
            $got = $self->smartRead(\$trailer, $trailer_size) ;
        }

        if ($got == $trailer_size) {
            $self->chkTrailer($trailer) == STATUS_OK
                or return G_ERR;
        }
        else {
            return $self->TrailerError("trailer truncated. Expected " . 
                                      "$trailer_size bytes, got $got")
                if *$self->{Strict};
            $self->pushBack($trailer)  ;
        }

        # TODO - if want to file file pointer, do it here

        if (! $self->smartEof()) {
            *$self->{NewStream} = 1 ;

            if (*$self->{MultiStream}) {
                *$self->{EndStream} = 0 ;
                return $buf_len ;
            }
        }

    }
    

    # return the number of uncompressed bytes read
    return $buf_len ;
}

sub reset
{
    my $self = shift ;

    return *$self->{Uncomp}->reset();
}

sub filterUncompressed
{
}

#sub isEndStream
#{
#    my $self = shift ;
#    return *$self->{NewStream} ||
#           *$self->{EndStream} ;
#}

sub nextStream
{
    my $self = shift ;

    my $status = $self->gotoNextStream();
    $status == 1
        or return $status ;

    *$self->{TotalInflatedBytesRead} = 0 ;
    *$self->{LineNo} = $. = 0;

    return 1;
}

sub gotoNextStream
{
    my $self = shift ;

    if (! *$self->{NewStream}) {
        my $status = 1;
        my $buffer ;

        # TODO - make this more efficient if know the offset for the end of
        # the stream and seekable
        $status = $self->read($buffer) 
            while $status > 0 ;

        return $status
            if $status < 0;
    }

    *$self->{NewStream} = 0 ;
    *$self->{EndStream} = 0 ;
    *$self->{CompressedInputLengthDone} = undef ;
    *$self->{CompressedInputLength} = undef ;
    $self->reset();
    *$self->{UnCompSize}->reset();
    *$self->{CompSize}->reset();

    my $magic = $self->ckMagic();

    if ( ! defined $magic) {
        if (! *$self->{Transparent} || $self->eof())
        {
            *$self->{EndStream} = 1 ;
            return 0;
        }

        $self->clearError();
        *$self->{Type} = 'plain';
        *$self->{Plain} = 1;
        $self->pushBack(*$self->{HeaderPending})  ;
    }
    else
    {
        *$self->{Info} = $self->readHeader($magic);

        if ( ! defined *$self->{Info} ) {
            *$self->{EndStream} = 1 ;
            return -1;
        }
    }

    push @{ *$self->{InfoList} }, *$self->{Info} ;

    return 1; 
}

sub streamCount
{
    my $self = shift ;
    return 1 if ! defined *$self->{InfoList};
    return scalar @{ *$self->{InfoList} }  ;
}

#sub read
#{
#    my $status = myRead(@_);
#    return undef if $status < 0;
#    return $status;
#}

sub read
{
    # return codes
    # >0 - ok, number of bytes read
    # =0 - ok, eof
    # <0 - not ok
    
    my $self = shift ;

    if (defined *$self->{ReadStatus} ) {
        my $status = *$self->{ReadStatus}[0];
        $self->saveErrorString( @{ *$self->{ReadStatus} } );
        delete  *$self->{ReadStatus} ;
        return $status ;
    }

    return G_EOF if *$self->{Closed} ;

    my $buffer ;

    if (ref $_[0] ) {
        $self->croakError(*$self->{ClassName} . "::read: buffer parameter is read-only")
            if Scalar::Util::readonly(${ $_[0] });

        $self->croakError(*$self->{ClassName} . "::read: not a scalar reference $_[0]" )
            unless ref $_[0] eq 'SCALAR' ;
        $buffer = $_[0] ;
    }
    else {
        $self->croakError(*$self->{ClassName} . "::read: buffer parameter is read-only")
            if Scalar::Util::readonly($_[0]);

        $buffer = \$_[0] ;
    }

    my $length = $_[1] ;
    my $offset = $_[2] || 0;

    if (! *$self->{AppendOutput}) {
        if (! $offset) {    
            $$buffer = '' ;
        }
        else {
            if ($offset > length($$buffer)) {
                $$buffer .= "\x00" x ($offset - length($$buffer));
            }
            else {
                substr($$buffer, $offset) = '';
            }
        }
    }
    elsif (! defined $$buffer) {
        $$buffer = '' ;
    }

    return G_EOF if !length *$self->{Pending} && *$self->{EndStream} ;

    # the core read will return 0 if asked for 0 bytes
    return 0 if defined $length && $length == 0 ;

    $length = $length || 0;

    $self->croakError(*$self->{ClassName} . "::read: length parameter is negative")
        if $length < 0 ;

    # Short-circuit if this is a simple read, with no length
    # or offset specified.
    unless ( $length || $offset) {
        if (length *$self->{Pending}) {
            $$buffer .= *$self->{Pending} ;
            my $len = length *$self->{Pending};
            *$self->{Pending} = '' ;
            return $len ;
        }
        else {
            my $len = 0;
            $len = $self->_raw_read($buffer) 
                while ! *$self->{EndStream} && $len == 0 ;
            return $len ;
        }
    }

    # Need to jump through more hoops - either length or offset 
    # or both are specified.
    my $out_buffer = *$self->{Pending} ;
    *$self->{Pending} = '';


    while (! *$self->{EndStream} && length($out_buffer) < $length)
    {
        my $buf_len = $self->_raw_read(\$out_buffer);
        return $buf_len 
            if $buf_len < 0 ;
    }

    $length = length $out_buffer 
        if length($out_buffer) < $length ;

    return 0 
        if $length == 0 ;

    $$buffer = '' 
        if ! defined $$buffer;

    $offset = length $$buffer
        if *$self->{AppendOutput} ;

    *$self->{Pending} = $out_buffer;
    $out_buffer = \*$self->{Pending} ;

    substr($$buffer, $offset) = substr($$out_buffer, 0, $length) ;
    substr($$out_buffer, 0, $length) =  '' ;

    return $length ;
}

sub _getline
{
    my $self = shift ;
    my $status = 0 ;

    # Slurp Mode
    if ( ! defined $/ ) {
        my $data ;
        1 while ($status = $self->read($data)) > 0 ;
        return ($status, \$data);
    }

    # Record Mode
    if ( ref $/ eq 'SCALAR' && ${$/} =~ /^\d+$/ && ${$/} > 0) {
        my $reclen = ${$/} ;
        my $data ;
        $status = $self->read($data, $reclen) ;
        return ($status, \$data);
    }

    # Paragraph Mode
    if ( ! length $/ ) {
        my $paragraph ;    
        while (($status = $self->read($paragraph)) > 0 ) {
            if ($paragraph =~ s/^(.*?\n\n+)//s) {
                *$self->{Pending}  = $paragraph ;
                my $par = $1 ;
                return (1, \$par);
            }
        }
        return ($status, \$paragraph);
    }

    # $/ isn't empty, or a reference, so it's Line Mode.
    {
        my $line ;    
        my $p = \*$self->{Pending}  ;
        while (($status = $self->read($line)) > 0 ) {
            my $offset = index($line, $/);
            if ($offset >= 0) {
                my $l = substr($line, 0, $offset + length $/ );
                substr($line, 0, $offset + length $/) = '';    
                $$p = $line;
                return (1, \$l);
            }
        }

        return ($status, \$line);
    }
}

sub getline
{
    my $self = shift;

    if (defined *$self->{ReadStatus} ) {
        $self->saveErrorString( @{ *$self->{ReadStatus} } );
        delete  *$self->{ReadStatus} ;
        return undef;
    }

    return undef 
        if *$self->{Closed} || (!length *$self->{Pending} && *$self->{EndStream}) ;

    my $current_append = *$self->{AppendOutput} ;
    *$self->{AppendOutput} = 1;

    my ($status, $lineref) = $self->_getline();
    *$self->{AppendOutput} = $current_append;

    return undef 
        if $status < 0 || length $$lineref == 0 ;

    $. = ++ *$self->{LineNo} ;

    return $$lineref ;
}

sub getlines
{
    my $self = shift;
    $self->croakError(*$self->{ClassName} . 
            "::getlines: called in scalar context\n") unless wantarray;
    my($line, @lines);
    push(@lines, $line) 
        while defined($line = $self->getline);
    return @lines;
}

sub READLINE
{
    goto &getlines if wantarray;
    goto &getline;
}

sub getc
{
    my $self = shift;
    my $buf;
    return $buf if $self->read($buf, 1);
    return undef;
}

sub ungetc
{
    my $self = shift;
    *$self->{Pending} = ""  unless defined *$self->{Pending} ;    
    *$self->{Pending} = $_[0] . *$self->{Pending} ;    
}


sub trailingData
{
    my $self = shift ;

    if (defined *$self->{FH} || defined *$self->{InputEvent} ) {
        return *$self->{Prime} ;
    }
    else {
        my $buf = *$self->{Buffer} ;
        my $offset = *$self->{BufferOffset} ;
        return substr($$buf, $offset) ;
    }
}


sub eof
{
    my $self = shift ;

    return (*$self->{Closed} ||
              (!length *$self->{Pending} 
                && ( $self->smartEof() || *$self->{EndStream}))) ;
}

sub tell
{
    my $self = shift ;

    my $in ;
    if (*$self->{Plain}) {
        $in = *$self->{PlainBytesRead} ;
    }
    else {
        $in = *$self->{TotalInflatedBytesRead} ;
    }

    my $pending = length *$self->{Pending} ;

    return 0 if $pending > $in ;
    return $in - $pending ;
}

sub close
{
    # todo - what to do if close is called before the end of the gzip file
    #        do we remember any trailing data?
    my $self = shift ;

    return 1 if *$self->{Closed} ;

    untie *$self 
        if $] >= 5.008 ;

    my $status = 1 ;

    if (defined *$self->{FH}) {
        if ((! *$self->{Handle} || *$self->{AutoClose}) && ! *$self->{StdIO}) {
            local $.; 
            $! = 0 ;
            $status = *$self->{FH}->close();
            return $self->saveErrorString(0, $!, $!)
                if !*$self->{InNew} && $self->saveStatus($!) != 0 ;
        }
        delete *$self->{FH} ;
        $! = 0 ;
    }
    *$self->{Closed} = 1 ;

    return 1;
}

sub DESTROY
{
    my $self = shift ;
    local ($., $@, $!, $^E, $?);

    $self->close() ;
}

sub seek
{
    my $self     = shift ;
    my $position = shift;
    my $whence   = shift ;

    my $here = $self->tell() ;
    my $target = 0 ;


    if ($whence == SEEK_SET) {
        $target = $position ;
    }
    elsif ($whence == SEEK_CUR) {
        $target = $here + $position ;
    }
    elsif ($whence == SEEK_END) {
        $target = $position ;
        $self->croakError(*$self->{ClassName} . "::seek: SEEK_END not allowed") ;
    }
    else {
        $self->croakError(*$self->{ClassName} ."::seek: unknown value, $whence, for whence parameter");
    }

    # short circuit if seeking to current offset
    if ($target == $here) {
        # On ordinary filehandles, seeking to the current
        # position also clears the EOF condition, so we
        # emulate this behavior locally while simultaneously
        # cascading it to the underlying filehandle
        if (*$self->{Plain}) {
            *$self->{EndStream} = 0;
            seek(*$self->{FH},0,1) if *$self->{FH};
        }
        return 1;
    }

    # Outlaw any attempt to seek backwards
    $self->croakError( *$self->{ClassName} ."::seek: cannot seek backwards")
        if $target < $here ;

    # Walk the file to the new offset
    my $offset = $target - $here ;

    my $got;
    while (($got = $self->read(my $buffer, List::Util::min($offset, *$self->{BlockSize})) ) > 0)
    {
        $offset -= $got;
        last if $offset == 0 ;
    }

    $here = $self->tell() ;
    return $offset == 0 ? 1 : 0 ;
}

sub fileno
{
    my $self = shift ;
    return defined *$self->{FH} 
           ? fileno *$self->{FH} 
           : undef ;
}

sub binmode
{
    1;
#    my $self     = shift ;
#    return defined *$self->{FH} 
#            ? binmode *$self->{FH} 
#            : 1 ;
}

sub opened
{
    my $self     = shift ;
    return ! *$self->{Closed} ;
}

sub autoflush
{
    my $self     = shift ;
    return defined *$self->{FH} 
            ? *$self->{FH}->autoflush(@_) 
            : undef ;
}

sub input_line_number
{
    my $self = shift ;
    my $last = *$self->{LineNo};
    $. = *$self->{LineNo} = $_[1] if @_ ;
    return $last;
}


*BINMODE  = \&binmode;
*SEEK     = \&seek; 
*READ     = \&read;
*sysread  = \&read;
*TELL     = \&tell;
*EOF      = \&eof;

*FILENO   = \&fileno;
*CLOSE    = \&close;

sub _notAvailable
{
    my $name = shift ;
    return sub { croak "$name Not Available: File opened only for intput" ; } ;
}


*print    = _notAvailable('print');
*PRINT    = _notAvailable('print');
*printf   = _notAvailable('printf');
*PRINTF   = _notAvailable('printf');
*write    = _notAvailable('write');
*WRITE    = _notAvailable('write');

#*sysread  = \&read;
#*syswrite = \&_notAvailable;


package IO::Uncompress::Base ;


1 ;
__END__

=head1 NAME

IO::Uncompress::Base - Base Class for IO::Uncompress modules 

=head1 SYNOPSIS

    use IO::Uncompress::Base ;

=head1 DESCRIPTION

This module is not intended for direct use in application code. Its sole
purpose if to to be sub-classed by IO::Uncompress modules.

=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::Lzop>, L<IO::Uncompress::UnLzop>, L<IO::Compress::Lzf>, L<IO::Uncompress::UnLzf>, 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, F<pmqs@cpan.org>. 

=head1 MODIFICATION HISTORY

See the Changes file.

=head1 COPYRIGHT AND LICENSE

Copyright (c) 2005-2013 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     �siZ��nb�m  �m    Uncompress/Inflate.pmnu �[���        package IO::Uncompress::Inflate ;
# for RFC1950

use strict ;
use warnings;
use bytes;

use IO::Compress::Base::Common  2.061 qw(:Status );
use IO::Compress::Zlib::Constants 2.061 ;

use IO::Uncompress::RawInflate  2.061 ;

require Exporter ;
our ($VERSION, @ISA, @EXPORT_OK, %EXPORT_TAGS, $InflateError);

$VERSION = '2.061';
$InflateError = '';

@ISA    = qw( Exporter IO::Uncompress::RawInflate );
@EXPORT_OK = qw( $InflateError inflate ) ;
%EXPORT_TAGS = %IO::Uncompress::RawInflate::DEFLATE_CONSTANTS ;
push @{ $EXPORT_TAGS{all} }, @EXPORT_OK ;
Exporter::export_ok_tags('all');


sub new
{
    my $class = shift ;
    my $obj = IO::Compress::Base::Common::createSelfTiedObject($class, \$InflateError);

    $obj->_create(undef, 0, @_);
}

sub inflate
{
    my $obj = IO::Compress::Base::Common::createSelfTiedObject(undef, \$InflateError);
    return $obj->_inf(@_);
}

sub getExtraParams
{
    return ();
}

sub ckParams
{
    my $self = shift ;
    my $got = shift ;

    # gunzip always needs adler32
    $got->setValue('adler32' => 1);

    return 1;
}

sub ckMagic
{
    my $self = shift;

    my $magic ;
    $self->smartReadExact(\$magic, ZLIB_HEADER_SIZE);

    *$self->{HeaderPending} = $magic ;

    return $self->HeaderError("Header size is " . 
                                        ZLIB_HEADER_SIZE . " bytes") 
        if length $magic != ZLIB_HEADER_SIZE;

    #return $self->HeaderError("CRC mismatch.")
    return undef
        if ! $self->isZlibMagic($magic) ;
                      
    *$self->{Type} = 'rfc1950';
    return $magic;
}

sub readHeader
{
    my $self = shift;
    my $magic = shift ;

    return $self->_readDeflateHeader($magic) ;
}

sub chkTrailer
{
    my $self = shift;
    my $trailer = shift;

    my $ADLER32 = unpack("N", $trailer) ;
    *$self->{Info}{ADLER32} = $ADLER32;    
    return $self->TrailerError("CRC mismatch")
        if *$self->{Strict} && $ADLER32 != *$self->{Uncomp}->adler32() ;

    return STATUS_OK;
}


sub isZlibMagic
{
    my $self = shift;
    my $buffer = shift ;

    return 0 
        if length $buffer < ZLIB_HEADER_SIZE ;

    my $hdr = unpack("n", $buffer) ;
    #return 0 if $hdr % 31 != 0 ;
    return $self->HeaderError("CRC mismatch.")
        if $hdr % 31 != 0 ;

    my ($CMF, $FLG) = unpack "C C", $buffer;
    my $cm =    bits($CMF, ZLIB_CMF_CM_OFFSET,    ZLIB_CMF_CM_BITS) ;

    # Only Deflate supported
    return $self->HeaderError("Not Deflate (CM is $cm)") 
        if $cm != ZLIB_CMF_CM_DEFLATED ;

    # Max window value is 7 for Deflate.
    my $cinfo = bits($CMF, ZLIB_CMF_CINFO_OFFSET, ZLIB_CMF_CINFO_BITS) ;
    return $self->HeaderError("CINFO > " . ZLIB_CMF_CINFO_MAX . 
                              " (CINFO is $cinfo)") 
        if $cinfo > ZLIB_CMF_CINFO_MAX ;

    return 1;    
}

sub bits
{
    my $data   = shift ;
    my $offset = shift ;
    my $mask  = shift ;

    ($data >> $offset ) & $mask & 0xFF ;
}


sub _readDeflateHeader
{
    my ($self, $buffer) = @_ ;

#    if (! $buffer) {
#        $self->smartReadExact(\$buffer, ZLIB_HEADER_SIZE);
#
#        *$self->{HeaderPending} = $buffer ;
#
#        return $self->HeaderError("Header size is " . 
#                                            ZLIB_HEADER_SIZE . " bytes") 
#            if length $buffer != ZLIB_HEADER_SIZE;
#
#        return $self->HeaderError("CRC mismatch.")
#            if ! isZlibMagic($buffer) ;
#    }
                                        
    my ($CMF, $FLG) = unpack "C C", $buffer;
    my $FDICT = bits($FLG, ZLIB_FLG_FDICT_OFFSET,  ZLIB_FLG_FDICT_BITS ),

    my $cm = bits($CMF, ZLIB_CMF_CM_OFFSET, ZLIB_CMF_CM_BITS) ;
    $cm == ZLIB_CMF_CM_DEFLATED 
        or return $self->HeaderError("Not Deflate (CM is $cm)") ;

    my $DICTID;
    if ($FDICT) {
        $self->smartReadExact(\$buffer, ZLIB_FDICT_SIZE)
            or return $self->TruncatedHeader("FDICT");

        $DICTID = unpack("N", $buffer) ;
    }

    *$self->{Type} = 'rfc1950';

    return {
        'Type'          => 'rfc1950',
        'FingerprintLength'  => ZLIB_HEADER_SIZE,
        'HeaderLength'  => ZLIB_HEADER_SIZE,
        'TrailerLength' => ZLIB_TRAILER_SIZE,
        'Header'        => $buffer,

        CMF     =>      $CMF                                               ,
        CM      => bits($CMF, ZLIB_CMF_CM_OFFSET,     ZLIB_CMF_CM_BITS    ),
        CINFO   => bits($CMF, ZLIB_CMF_CINFO_OFFSET,  ZLIB_CMF_CINFO_BITS ),
        FLG     =>      $FLG                                               ,
        FCHECK  => bits($FLG, ZLIB_FLG_FCHECK_OFFSET, ZLIB_FLG_FCHECK_BITS),
        FDICT   => bits($FLG, ZLIB_FLG_FDICT_OFFSET,  ZLIB_FLG_FDICT_BITS ),
        FLEVEL  => bits($FLG, ZLIB_FLG_LEVEL_OFFSET,  ZLIB_FLG_LEVEL_BITS ),
        DICTID  =>      $DICTID                                            ,

    };
}


1 ;

__END__


=head1 NAME

IO::Uncompress::Inflate - Read RFC 1950 files/buffers

=head1 SYNOPSIS

    use IO::Uncompress::Inflate qw(inflate $InflateError) ;

    my $status = inflate $input => $output [,OPTS]
        or die "inflate failed: $InflateError\n";

    my $z = new IO::Uncompress::Inflate $input [OPTS] 
        or die "inflate failed: $InflateError\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()

    $InflateError ;

    # 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 1950.

For writing RFC 1950 files/buffers, see the companion module IO::Compress::Deflate.

=head1 Functional Interface

A top-level function, C<inflate>, 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::Inflate qw(inflate $InflateError) ;

    inflate $input_filename_or_reference => $output_filename_or_reference [,OPTS] 
        or die "inflate failed: $InflateError\n";

The functional interface needs Perl5.005 or better.

=head2 inflate $input_filename_or_reference => $output_filename_or_reference [, OPTS]

C<inflate> expects at least two parameters,
C<$input_filename_or_reference> and C<$output_filename_or_reference>.

=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 <$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<inflate> 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<inflate> 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

Unless specified below, the optional parameters for C<inflate>,
C<OPTS>, are the same as those used with the OO interface defined in the
L</"Constructor Options"> section below.

=over 5

=item C<< AutoClose => 0|1 >>

This option applies to any input or output data streams to 
C<inflate> 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<inflate> has
completed.

This parameter defaults to 0.

=item C<< BinModeOut => 0|1 >>

When writing to a file or filehandle, set C<binmode> before writing to the
file.

Defaults to 0.

=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.1950> and write the
uncompressed data to the file C<file1.txt>.

    use strict ;
    use warnings ;
    use IO::Uncompress::Inflate qw(inflate $InflateError) ;

    my $input = "file1.txt.1950";
    my $output = "file1.txt";
    inflate $input => $output
        or die "inflate failed: $InflateError\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::Inflate qw(inflate $InflateError) ;
    use IO::File ;

    my $input = new IO::File "<file1.txt.1950"
        or die "Cannot open 'file1.txt.1950': $!\n" ;
    my $buffer ;
    inflate $input => \$buffer 
        or die "inflate failed: $InflateError\n";

To uncompress all files in the directory "/my/home" that match "*.txt.1950" and store the compressed data in the same directory

    use strict ;
    use warnings ;
    use IO::Uncompress::Inflate qw(inflate $InflateError) ;

    inflate '</my/home/*.txt.1950>' => '</my/home/#1.txt>'
        or die "inflate failed: $InflateError\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::Inflate qw(inflate $InflateError) ;

    for my $input ( glob "/my/home/*.txt.1950" )
    {
        my $output = $input;
        $output =~ s/.1950// ;
        inflate $input => $output 
            or die "Error compressing '$input': $InflateError\n";
    }

=head1 OO Interface

=head2 Constructor

The format of the constructor for IO::Uncompress::Inflate is shown below

    my $z = new IO::Uncompress::Inflate $input [OPTS]
        or die "IO::Uncompress::Inflate failed: $InflateError\n";

Returns an C<IO::Uncompress::Inflate> object on success and undef on failure.
The variable C<$InflateError> will contain an error message on failure.

If you are running Perl 5.005 or better the object, C<$z>, returned from
IO::Uncompress::Inflate can be used exactly like an L<IO::File|IO::File> filehandle.
This means that all normal input file operations can be carried out with
C<$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::Inflate 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::Inflate 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

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

=back

=head2 Examples

TODO

=head1 Methods 

=head2 read

Usage is

    $status = $z->read($buffer)

Reads a block of compressed data (the size the 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 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
ucompressed 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 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::Inflate 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::Inflate
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 this IO::Uncompress::Inflate at present. 

=over 5

=item :all

Imports C<inflate> and C<$InflateError>.
Same as doing this

    use IO::Uncompress::Inflate qw(inflate $InflateError) ;

=back

=head1 EXAMPLES

=head2 Working with Net::FTP

See L<IO::Compress::FAQ|IO::Compress::FAQ/"Compressed files and Net::FTP">

=head1 SEE ALSO

L<Compress::Zlib>, L<IO::Compress::Gzip>, L<IO::Uncompress::Gunzip>, L<IO::Compress::Deflate>, 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::Lzop>, L<IO::Uncompress::UnLzop>, L<IO::Compress::Lzf>, L<IO::Uncompress::UnLzf>, 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 
F<http://www.faqs.org/rfcs/rfc1950.html>,
F<http://www.faqs.org/rfcs/rfc1951.html> and
F<http://www.faqs.org/rfcs/rfc1952.html>

The I<zlib> compression library was written by Jean-loup Gailly
F<gzip@prep.ai.mit.edu> and Mark Adler F<madler@alumni.caltech.edu>.

The primary site for the I<zlib> compression library is
F<http://www.zlib.org>.

The primary site for gzip is F<http://www.gzip.org>.

=head1 AUTHOR

This module was written by Paul Marquess, F<pmqs@cpan.org>. 

=head1 MODIFICATION HISTORY

See the Changes file.

=head1 COPYRIGHT AND LICENSE

Copyright (c) 2005-2013 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     �siZ���>��  ��    Uncompress/Unzip.pmnu �[���        package IO::Uncompress::Unzip;

require 5.006 ;

# for RFC1952

use strict ;
use warnings;
#use bytes;

use IO::File;
use IO::Uncompress::RawInflate  2.061 ;
use IO::Compress::Base::Common  2.061 qw(:Status );
use IO::Uncompress::Adapter::Inflate  2.061 ;
use IO::Uncompress::Adapter::Identity 2.061 ;
use IO::Compress::Zlib::Extra 2.061 ;
use IO::Compress::Zip::Constants 2.061 ;

use Compress::Raw::Zlib  2.061 () ;

BEGIN
{
    eval{ require IO::Uncompress::Adapter::Bunzip2 ;
           import  IO::Uncompress::Adapter::Bunzip2 } ;
    eval{ require IO::Uncompress::Adapter::UnLzma ;
          import  IO::Uncompress::Adapter::UnLzma } ;
}


require Exporter ;

our ($VERSION, @ISA, @EXPORT_OK, %EXPORT_TAGS, $UnzipError, %headerLookup);

$VERSION = '2.061';
$UnzipError = '';

@ISA    = qw(Exporter IO::Uncompress::RawInflate);
@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,
        );

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],
            
            # 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');

    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 undef
                    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;                

                if ($status == STATUS_ENDSTREAM) {
                    *$self->{Uncomp}->reset();
                    $self->pushBack($b)  ;
                    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 = ();
    my $streamingMode = ($gpFlag & ZIP_GP_FLAG_STREAMING_MASK) ? 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");
        $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_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'               => $filename,
        'Time'               => _dosToUnixTime($lastModTime),
        'Stream'             => $streamingMode,

        'MethodID'           => $compressedMethod,
        'MethodName'         => $compressedMethod == ZIP_CM_DEFLATE 
                                 ? "Deflated" 
                                 : $compressedMethod == ZIP_CM_BZIP2
                                     ? "Bzip2"
                                     : $compressedMethod == ZIP_CM_LZMA
                                         ? "Lzma"
                                         : $compressedMethod == ZIP_CM_STORE
                                             ? "Stored"
                                             : "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 = new U64 $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 = new IO::Uncompress::Unzip $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.

=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>.

=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 <$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

Unless specified below, the optional parameters for C<unzip>,
C<OPTS>, are the same as those used with the OO interface defined in the
L</"Constructor Options"> section 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 >>

When writing to a file or filehandle, set C<binmode> before writing to the
file.

Defaults to 0.

=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> partameter.

    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 = new IO::File "<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 = new IO::Uncompress::Unzip $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<< 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 the 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 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
ucompressed 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 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.

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 this 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 = new IO::Uncompress::Unzip $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 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::Lzop>, L<IO::Uncompress::UnLzop>, L<IO::Compress::Lzf>, L<IO::Uncompress::UnLzf>, 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 
F<http://www.faqs.org/rfcs/rfc1950.html>,
F<http://www.faqs.org/rfcs/rfc1951.html> and
F<http://www.faqs.org/rfcs/rfc1952.html>

The I<zlib> compression library was written by Jean-loup Gailly
F<gzip@prep.ai.mit.edu> and Mark Adler F<madler@alumni.caltech.edu>.

The primary site for the I<zlib> compression library is
F<http://www.zlib.org>.

The primary site for gzip is F<http://www.gzip.org>.

=head1 AUTHOR

This module was written by Paul Marquess, F<pmqs@cpan.org>. 

=head1 MODIFICATION HISTORY

See the Changes file.

=head1 COPYRIGHT AND LICENSE

Copyright (c) 2005-2013 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     �siZ�U�e  e    Compress/RawDeflate.pmnu �[���        package IO::Compress::RawDeflate ;

# create RFC1951
#
use strict ;
use warnings;
use bytes;

use IO::Compress::Base 2.061 ;
use IO::Compress::Base::Common  2.061 qw(:Status );
use IO::Compress::Adapter::Deflate 2.061 ;

require Exporter ;

our ($VERSION, @ISA, @EXPORT_OK, %DEFLATE_CONSTANTS, %EXPORT_TAGS, $RawDeflateError);

$VERSION = '2.061';
$RawDeflateError = '';

@ISA = qw(Exporter IO::Compress::Base);
@EXPORT_OK = qw( $RawDeflateError rawdeflate ) ;
push @EXPORT_OK, @IO::Compress::Adapter::Deflate::EXPORT_OK ;

%EXPORT_TAGS = %IO::Compress::Adapter::Deflate::DEFLATE_CONSTANTS;


{
    my %seen;
    foreach (keys %EXPORT_TAGS )
    {
        push @{$EXPORT_TAGS{constants}}, 
                 grep { !$seen{$_}++ } 
                 @{ $EXPORT_TAGS{$_} }
    }
    $EXPORT_TAGS{all} = $EXPORT_TAGS{constants} ;
}


%DEFLATE_CONSTANTS = %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, \$RawDeflateError);

    return $obj->_create(undef, @_);
}

sub rawdeflate
{
    my $obj = IO::Compress::Base::Common::createSelfTiedObject(undef, \$RawDeflateError);
    return $obj->_def(@_);
}

sub ckParams
{
    my $self = shift ;
    my $got = shift;

    return 1 ;
}

sub mkComp
{
    my $self = shift ;
    my $got = shift ;

    my ($obj, $errstr, $errno) = IO::Compress::Adapter::Deflate::mkCompObject(
                                                 $got->getValue('crc32'),
                                                 $got->getValue('adler32'),
                                                 $got->getValue('level'),
                                                 $got->getValue('strategy')
                                                 );

   return $self->saveErrorString(undef, $errstr, $errno)
       if ! defined $obj;

   return $obj;    
}


sub mkHeader
{
    my $self = shift ;
    return '';
}

sub mkTrailer
{
    my $self = shift ;
    return '';
}

sub mkFinalTrailer
{
    return '';
}


#sub newHeader
#{
#    my $self = shift ;
#    return '';
#}

sub getExtraParams
{
    my $self = shift ;
    return getZlibParams();
}

use IO::Compress::Base::Common  2.061 qw(:Parse);
use Compress::Raw::Zlib  2.061 qw(Z_DEFLATED Z_DEFAULT_COMPRESSION Z_DEFAULT_STRATEGY);
our %PARAMS = (
            #'method'   => [IO::Compress::Base::Common::Parse_unsigned,  Z_DEFLATED],
            'level'     => [IO::Compress::Base::Common::Parse_signed,    Z_DEFAULT_COMPRESSION],
            'strategy'  => [IO::Compress::Base::Common::Parse_signed,    Z_DEFAULT_STRATEGY],

            'crc32'     => [IO::Compress::Base::Common::Parse_boolean,   0],
            'adler32'   => [IO::Compress::Base::Common::Parse_boolean,   0],
            'merge'     => [IO::Compress::Base::Common::Parse_boolean,   0], 
        );
        
sub getZlibParams
{
    return %PARAMS;    
}

sub getInverseClass
{
    return ('IO::Uncompress::RawInflate', 
                \$IO::Uncompress::RawInflate::RawInflateError);
}

sub getFileInfo
{
    my $self = shift ;
    my $params = shift;
    my $file = shift ;
    
}

use IO::Seekable qw(SEEK_SET);

sub createMerge
{
    my $self = shift ;
    my $outValue = shift ;
    my $outType = shift ;

    my ($invClass, $error_ref) = $self->getInverseClass();
    eval "require $invClass" 
        or die "aaaahhhh" ;

    my $inf = $invClass->new( $outValue, 
                             Transparent => 0, 
                             #Strict     => 1,
                             AutoClose   => 0,
                             Scan        => 1)
       or return $self->saveErrorString(undef, "Cannot create InflateScan object: $$error_ref" ) ;

    my $end_offset = 0;
    $inf->scan() 
        or return $self->saveErrorString(undef, "Error Scanning: $$error_ref", $inf->errorNo) ;
    $inf->zap($end_offset) 
        or return $self->saveErrorString(undef, "Error Zapping: $$error_ref", $inf->errorNo) ;

    my $def = *$self->{Compress} = $inf->createDeflate();

    *$self->{Header} = *$inf->{Info}{Header};
    *$self->{UnCompSize} = *$inf->{UnCompSize}->clone();
    *$self->{CompSize} = *$inf->{CompSize}->clone();
    # TODO -- fix this
    #*$self->{CompSize} = new U64(0, *$self->{UnCompSize_32bit});


    if ( $outType eq 'buffer') 
      { substr( ${ *$self->{Buffer} }, $end_offset) = '' }
    elsif ($outType eq 'handle' || $outType eq 'filename') {
        *$self->{FH} = *$inf->{FH} ;
        delete *$inf->{FH};
        *$self->{FH}->flush() ;
        *$self->{Handle} = 1 if $outType eq 'handle';

        #seek(*$self->{FH}, $end_offset, SEEK_SET) 
        *$self->{FH}->seek($end_offset, SEEK_SET) 
            or return $self->saveErrorString(undef, $!, $!) ;
    }

    return $def ;
}

#### zlib specific methods

sub deflateParams 
{
    my $self = shift ;

    my $level = shift ;
    my $strategy = shift ;

    my $status = *$self->{Compress}->deflateParams(Level => $level, Strategy => $strategy) ;
    return $self->saveErrorString(0, *$self->{Compress}{Error}, *$self->{Compress}{ErrorNo})
        if $status == STATUS_ERROR;

    return 1;    
}


1;

__END__

=head1 NAME

IO::Compress::RawDeflate - Write RFC 1951 files/buffers
 
 
=head1 SYNOPSIS

    use IO::Compress::RawDeflate qw(rawdeflate $RawDeflateError) ;

    my $status = rawdeflate $input => $output [,OPTS] 
        or die "rawdeflate failed: $RawDeflateError\n";

    my $z = new IO::Compress::RawDeflate $output [,OPTS]
        or die "rawdeflate failed: $RawDeflateError\n";

    $z->print($string);
    $z->printf($format, $string);
    $z->write($string);
    $z->syswrite($string [, $length, $offset]);
    $z->flush();
    $z->tell();
    $z->eof();
    $z->seek($position, $whence);
    $z->binmode();
    $z->fileno();
    $z->opened();
    $z->autoflush();
    $z->input_line_number();
    $z->newStream( [OPTS] );
    
    $z->deflateParams();
    
    $z->close() ;

    $RawDeflateError ;

    # IO::File mode

    print $z $string;
    printf $z $format, $string;
    tell $z
    eof $z
    seek $z, $position, $whence
    binmode $z
    fileno $z
    close $z ;
    

=head1 DESCRIPTION

This module provides a Perl interface that allows writing compressed
data to files or buffer as defined in RFC 1951.

Note that RFC 1951 data is not a good choice of compression format
to use in isolation, especially if you want to auto-detect it.

For reading RFC 1951 files/buffers, see the companion module 
L<IO::Uncompress::RawInflate|IO::Uncompress::RawInflate>.

=head1 Functional Interface

A top-level function, C<rawdeflate>, is provided to carry out
"one-shot" compression between buffers and/or files. For finer
control over the compression process, see the L</"OO Interface">
section.

    use IO::Compress::RawDeflate qw(rawdeflate $RawDeflateError) ;

    rawdeflate $input_filename_or_reference => $output_filename_or_reference [,OPTS] 
        or die "rawdeflate failed: $RawDeflateError\n";

The functional interface needs Perl5.005 or better.

=head2 rawdeflate $input_filename_or_reference => $output_filename_or_reference [, OPTS]

C<rawdeflate> expects at least two parameters,
C<$input_filename_or_reference> and C<$output_filename_or_reference>.

=head3 The C<$input_filename_or_reference> parameter

The parameter, C<$input_filename_or_reference>, is used to define the
source of the uncompressed data. 

It can take one of the following forms:

=over 5

=item A filename

If the <$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 compressed.

=item An Input FileGlob string

If C<$input_filename_or_reference> is a string that is delimited by the
characters "<" and ">" C<rawdeflate> 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 compressed 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 
compressed data will be written to it.

=item A filehandle

If the C<$output_filename_or_reference> parameter is a filehandle, the
compressed 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
compressed 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 compressed 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<rawdeflate> 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<$input_filename_or_reference> maps to multiple files/buffers and
C<$output_filename_or_reference> is a single
file/buffer the input files/buffers will be stored
in C<$output_filename_or_reference> as a concatenated series of compressed data streams.

=head2 Optional Parameters

Unless specified below, the optional parameters for C<rawdeflate>,
C<OPTS>, are the same as those used with the OO interface defined in the
L</"Constructor Options"> section below.

=over 5

=item C<< AutoClose => 0|1 >>

This option applies to any input or output data streams to 
C<rawdeflate> 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<rawdeflate> has
completed.

This parameter defaults to 0.

=item C<< BinModeIn => 0|1 >>

When reading from a file or filehandle, set C<binmode> before reading.

Defaults to 0.

=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 compressed data will be append to the end of
the output buffer. Otherwise the output buffer will be cleared before any
compressed 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 compressed
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 compressed 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 compressed 
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 compressed data. If the output is a filename, it will be opened for
appending. If the output is a buffer, all compressed 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 compressed 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 compressed data is output.

Defaults to 0.

=back

=head2 Examples

To read the contents of the file C<file1.txt> and write the compressed
data to the file C<file1.txt.1951>.

    use strict ;
    use warnings ;
    use IO::Compress::RawDeflate qw(rawdeflate $RawDeflateError) ;

    my $input = "file1.txt";
    rawdeflate $input => "$input.1951"
        or die "rawdeflate failed: $RawDeflateError\n";

To read from an existing Perl filehandle, C<$input>, and write the
compressed data to a buffer, C<$buffer>.

    use strict ;
    use warnings ;
    use IO::Compress::RawDeflate qw(rawdeflate $RawDeflateError) ;
    use IO::File ;

    my $input = new IO::File "<file1.txt"
        or die "Cannot open 'file1.txt': $!\n" ;
    my $buffer ;
    rawdeflate $input => \$buffer 
        or die "rawdeflate failed: $RawDeflateError\n";

To compress all files in the directory "/my/home" that match "*.txt"
and store the compressed data in the same directory

    use strict ;
    use warnings ;
    use IO::Compress::RawDeflate qw(rawdeflate $RawDeflateError) ;

    rawdeflate '</my/home/*.txt>' => '<*.1951>'
        or die "rawdeflate failed: $RawDeflateError\n";

and if you want to compress each file one at a time, this will do the trick

    use strict ;
    use warnings ;
    use IO::Compress::RawDeflate qw(rawdeflate $RawDeflateError) ;

    for my $input ( glob "/my/home/*.txt" )
    {
        my $output = "$input.1951" ;
        rawdeflate $input => $output 
            or die "Error compressing '$input': $RawDeflateError\n";
    }

=head1 OO Interface

=head2 Constructor

The format of the constructor for C<IO::Compress::RawDeflate> is shown below

    my $z = new IO::Compress::RawDeflate $output [,OPTS]
        or die "IO::Compress::RawDeflate failed: $RawDeflateError\n";

It returns an C<IO::Compress::RawDeflate> object on success and undef on failure. 
The variable C<$RawDeflateError> will contain an error message on failure.

If you are running Perl 5.005 or better the object, C<$z>, returned from 
IO::Compress::RawDeflate can be used exactly like an L<IO::File|IO::File> filehandle. 
This means that all normal output file operations can be carried out 
with C<$z>. 
For example, to write to a compressed file/buffer you can use either of 
these forms

    $z->print("hello world\n");
    print $z "hello world\n";

The mandatory parameter C<$output> is used to control the destination
of the compressed data. This parameter can take one of these forms.

=over 5

=item A filename

If the C<$output> parameter is a simple scalar, it is assumed to be a
filename. This file will be opened for writing and the compressed data
will be written to it.

=item A filehandle

If the C<$output> parameter is a filehandle, the compressed data will be
written to it.
The string '-' can be used as an alias for standard output.

=item A scalar reference 

If C<$output> is a scalar reference, the compressed data will be stored
in C<$$output>.

=back

If the C<$output> parameter is any other type, C<IO::Compress::RawDeflate>::new will
return undef.

=head2 Constructor Options

C<OPTS> is any combination of the following options:

=over 5

=item C<< AutoClose => 0|1 >>

This option is only valid when the C<$output> parameter is a filehandle. If
specified, and the value is true, it will result in the C<$output> being
closed once either the C<close> method is called or the C<IO::Compress::RawDeflate>
object is destroyed.

This parameter defaults to 0.

=item C<< Append => 0|1 >>

Opens C<$output> in append mode. 

The behaviour of this option is dependent on the type of C<$output>.

=over 5

=item * A Buffer

If C<$output> is a buffer and C<Append> is enabled, all compressed data
will be append to the end of C<$output>. Otherwise C<$output> will be
cleared before any data is written to it.

=item * A Filename

If C<$output> is a filename and 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 compressed data is written to it.

=item * A Filehandle

If C<$output> is a filehandle, the file pointer will be positioned to the
end of the file via a call to C<seek> before any compressed data is written
to it.  Otherwise the file pointer will not be moved.

=back

This parameter defaults to 0.

=item C<< Merge => 0|1 >>

This option is used to compress input data and append it to an existing
compressed data stream in C<$output>. The end result is a single compressed
data stream stored in C<$output>. 

It is a fatal error to attempt to use this option when C<$output> is not an
RFC 1951 data stream.

There are a number of other limitations with the C<Merge> option:

=over 5 

=item 1

This module needs to have been built with zlib 1.2.1 or better to work. A
fatal error will be thrown if C<Merge> is used with an older version of
zlib.  

=item 2

If C<$output> is a file or a filehandle, it must be seekable.

=back

This parameter defaults to 0.

=item -Level 

Defines the compression level used by zlib. The value should either be
a number between 0 and 9 (0 means no compression and 9 is maximum
compression), or one of the symbolic constants defined below.

   Z_NO_COMPRESSION
   Z_BEST_SPEED
   Z_BEST_COMPRESSION
   Z_DEFAULT_COMPRESSION

The default is Z_DEFAULT_COMPRESSION.

Note, these constants are not imported by C<IO::Compress::RawDeflate> by default.

    use IO::Compress::RawDeflate qw(:strategy);
    use IO::Compress::RawDeflate qw(:constants);
    use IO::Compress::RawDeflate qw(:all);

=item -Strategy 

Defines the strategy used to tune the compression. Use one of the symbolic
constants defined below.

   Z_FILTERED
   Z_HUFFMAN_ONLY
   Z_RLE
   Z_FIXED
   Z_DEFAULT_STRATEGY

The default is Z_DEFAULT_STRATEGY.

=item C<< Strict => 0|1 >>

This is a placeholder option.

=back

=head2 Examples

TODO

=head1 Methods 

=head2 print

Usage is

    $z->print($data)
    print $z $data

Compresses and outputs the contents of the C<$data> parameter. This
has the same behaviour as the C<print> built-in.

Returns true if successful.

=head2 printf

Usage is

    $z->printf($format, $data)
    printf $z $format, $data

Compresses and outputs the contents of the C<$data> parameter.

Returns true if successful.

=head2 syswrite

Usage is

    $z->syswrite $data
    $z->syswrite $data, $length
    $z->syswrite $data, $length, $offset

Compresses and outputs the contents of the C<$data> parameter.

Returns the number of uncompressed bytes written, or C<undef> if
unsuccessful.

=head2 write

Usage is

    $z->write $data
    $z->write $data, $length
    $z->write $data, $length, $offset

Compresses and outputs the contents of the C<$data> parameter.

Returns the number of uncompressed bytes written, or C<undef> if
unsuccessful.

=head2 flush

Usage is

    $z->flush;
    $z->flush($flush_type);

Flushes any pending compressed data to the output file/buffer.

This method takes an optional parameter, C<$flush_type>, that controls
how the flushing will be carried out. By default the C<$flush_type>
used is C<Z_FINISH>. Other valid values for C<$flush_type> are
C<Z_NO_FLUSH>, C<Z_SYNC_FLUSH>, C<Z_FULL_FLUSH> and C<Z_BLOCK>. It is
strongly recommended that you only set the C<flush_type> parameter if
you fully understand the implications of what it does - overuse of C<flush>
can seriously degrade the level of compression achieved. See the C<zlib>
documentation for details.

Returns true on success.

=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 C<close> method has been called.

=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 output file/buffer.
It is a fatal error to attempt to seek backward.

Empty parts of the file/buffer will have NULL (0x00) bytes written to them.

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)

This method always returns C<undef> when compressing. 

=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 ;

Flushes any pending compressed data and then closes the output file/buffer. 

For most versions of Perl this method will be automatically invoked if
the IO::Compress::RawDeflate 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::Compress::RawDeflate
object was created, and the object is associated with a file, the
underlying file will also be closed.

=head2 newStream([OPTS])

Usage is

    $z->newStream( [OPTS] )

Closes the current compressed data stream and starts a new one.

OPTS consists of any of the the options that are available when creating
the C<$z> object.

See the L</"Constructor Options"> section for more details.

=head2 deflateParams

Usage is

    $z->deflateParams

TODO

=head1 Importing 

A number of symbolic constants are required by some methods in 
C<IO::Compress::RawDeflate>. None are imported by default.

=over 5

=item :all

Imports C<rawdeflate>, C<$RawDeflateError> and all symbolic
constants that can be used by C<IO::Compress::RawDeflate>. Same as doing this

    use IO::Compress::RawDeflate qw(rawdeflate $RawDeflateError :constants) ;

=item :constants

Import all symbolic constants. Same as doing this

    use IO::Compress::RawDeflate qw(:flush :level :strategy) ;

=item :flush

These symbolic constants are used by the C<flush> method.

    Z_NO_FLUSH
    Z_PARTIAL_FLUSH
    Z_SYNC_FLUSH
    Z_FULL_FLUSH
    Z_FINISH
    Z_BLOCK

=item :level

These symbolic constants are used by the C<Level> option in the constructor.

    Z_NO_COMPRESSION
    Z_BEST_SPEED
    Z_BEST_COMPRESSION
    Z_DEFAULT_COMPRESSION

=item :strategy

These symbolic constants are used by the C<Strategy> option in the constructor.

    Z_FILTERED
    Z_HUFFMAN_ONLY
    Z_RLE
    Z_FIXED
    Z_DEFAULT_STRATEGY

    
=back

=head1 EXAMPLES

=head2 Apache::GZip Revisited

See L<IO::Compress::FAQ|IO::Compress::FAQ/"Apache::GZip Revisited">

=head2 Working with Net::FTP

See L<IO::Compress::FAQ|IO::Compress::FAQ/"Compressed files and Net::FTP">

=head1 SEE ALSO

L<Compress::Zlib>, L<IO::Compress::Gzip>, L<IO::Uncompress::Gunzip>, L<IO::Compress::Deflate>, L<IO::Uncompress::Inflate>, 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::Lzop>, L<IO::Uncompress::UnLzop>, L<IO::Compress::Lzf>, L<IO::Uncompress::UnLzf>, 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 
F<http://www.faqs.org/rfcs/rfc1950.html>,
F<http://www.faqs.org/rfcs/rfc1951.html> and
F<http://www.faqs.org/rfcs/rfc1952.html>

The I<zlib> compression library was written by Jean-loup Gailly
F<gzip@prep.ai.mit.edu> and Mark Adler F<madler@alumni.caltech.edu>.

The primary site for the I<zlib> compression library is
F<http://www.zlib.org>.

The primary site for gzip is F<http://www.gzip.org>.

=head1 AUTHOR

This module was written by Paul Marquess, F<pmqs@cpan.org>. 

=head1 MODIFICATION HISTORY

See the Changes file.

=head1 COPYRIGHT AND LICENSE

Copyright (c) 2005-2013 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     �siZY�g�?  ?    Compress/Gzip/Constants.pmnu �[���        package IO::Compress::Gzip::Constants;

use strict ;
use warnings;
use bytes;

require Exporter;

our ($VERSION, @ISA, @EXPORT, %GZIP_OS_Names);
our ($GZIP_FNAME_INVALID_CHAR_RE, $GZIP_FCOMMENT_INVALID_CHAR_RE);

$VERSION = '2.061';

@ISA = qw(Exporter);

@EXPORT= qw(

    GZIP_ID_SIZE
    GZIP_ID1
    GZIP_ID2

    GZIP_FLG_DEFAULT
    GZIP_FLG_FTEXT
    GZIP_FLG_FHCRC
    GZIP_FLG_FEXTRA
    GZIP_FLG_FNAME
    GZIP_FLG_FCOMMENT
    GZIP_FLG_RESERVED

    GZIP_CM_DEFLATED

    GZIP_MIN_HEADER_SIZE
    GZIP_TRAILER_SIZE

    GZIP_MTIME_DEFAULT
    GZIP_XFL_DEFAULT
    GZIP_FEXTRA_HEADER_SIZE
    GZIP_FEXTRA_MAX_SIZE
    GZIP_FEXTRA_SUBFIELD_HEADER_SIZE
    GZIP_FEXTRA_SUBFIELD_ID_SIZE
    GZIP_FEXTRA_SUBFIELD_LEN_SIZE
    GZIP_FEXTRA_SUBFIELD_MAX_SIZE

    $GZIP_FNAME_INVALID_CHAR_RE
    $GZIP_FCOMMENT_INVALID_CHAR_RE

    GZIP_FHCRC_SIZE

    GZIP_ISIZE_MAX
    GZIP_ISIZE_MOD_VALUE


    GZIP_NULL_BYTE

    GZIP_OS_DEFAULT

    %GZIP_OS_Names

    GZIP_MINIMUM_HEADER

    );

# Constant names derived from RFC 1952

use constant GZIP_ID_SIZE                     => 2 ;
use constant GZIP_ID1                         => 0x1F;
use constant GZIP_ID2                         => 0x8B;

use constant GZIP_MIN_HEADER_SIZE             => 10 ;# minimum gzip header size
use constant GZIP_TRAILER_SIZE                => 8 ;


use constant GZIP_FLG_DEFAULT                 => 0x00 ;
use constant GZIP_FLG_FTEXT                   => 0x01 ;
use constant GZIP_FLG_FHCRC                   => 0x02 ; # called CONTINUATION in gzip
use constant GZIP_FLG_FEXTRA                  => 0x04 ;
use constant GZIP_FLG_FNAME                   => 0x08 ;
use constant GZIP_FLG_FCOMMENT                => 0x10 ;
#use constant GZIP_FLG_ENCRYPTED              => 0x20 ; # documented in gzip sources
use constant GZIP_FLG_RESERVED                => (0x20 | 0x40 | 0x80) ;

use constant GZIP_XFL_DEFAULT                 => 0x00 ;

use constant GZIP_MTIME_DEFAULT               => 0x00 ;

use constant GZIP_FEXTRA_HEADER_SIZE          => 2 ;
use constant GZIP_FEXTRA_MAX_SIZE             => 0xFFFF ;
use constant GZIP_FEXTRA_SUBFIELD_ID_SIZE     => 2 ;
use constant GZIP_FEXTRA_SUBFIELD_LEN_SIZE    => 2 ;
use constant GZIP_FEXTRA_SUBFIELD_HEADER_SIZE => GZIP_FEXTRA_SUBFIELD_ID_SIZE +
                                                 GZIP_FEXTRA_SUBFIELD_LEN_SIZE;
use constant GZIP_FEXTRA_SUBFIELD_MAX_SIZE    => GZIP_FEXTRA_MAX_SIZE - 
                                                 GZIP_FEXTRA_SUBFIELD_HEADER_SIZE ;


if (ord('A') == 193)
{
    # EBCDIC 
    $GZIP_FNAME_INVALID_CHAR_RE = '[\x00-\x3f\xff]';
    $GZIP_FCOMMENT_INVALID_CHAR_RE = '[\x00-\x0a\x11-\x14\x16-\x3f\xff]';
    
}
else
{
    $GZIP_FNAME_INVALID_CHAR_RE       =  '[\x00-\x1F\x7F-\x9F]';
    $GZIP_FCOMMENT_INVALID_CHAR_RE    =  '[\x00-\x09\x11-\x1F\x7F-\x9F]';
}            

use constant GZIP_FHCRC_SIZE        => 2 ; # aka CONTINUATION in gzip

use constant GZIP_CM_DEFLATED       => 8 ;

use constant GZIP_NULL_BYTE         => "\x00";
use constant GZIP_ISIZE_MAX         => 0xFFFFFFFF ;
use constant GZIP_ISIZE_MOD_VALUE   => GZIP_ISIZE_MAX + 1 ;

# OS Names sourced from http://www.gzip.org/format.txt

use constant GZIP_OS_DEFAULT=> 0xFF ;
%GZIP_OS_Names = (
    0   => 'MS-DOS',
    1   => 'Amiga',
    2   => 'VMS',
    3   => 'Unix',
    4   => 'VM/CMS',
    5   => 'Atari TOS',
    6   => 'HPFS (OS/2, NT)',
    7   => 'Macintosh',
    8   => 'Z-System',
    9   => 'CP/M',
    10  => 'TOPS-20',
    11  => 'NTFS (NT)',
    12  => 'SMS QDOS',
    13  => 'Acorn RISCOS',
    14  => 'VFAT file system (Win95, NT)',
    15  => 'MVS',
    16  => 'BeOS',
    17  => 'Tandem/NSK',
    18  => 'THEOS',
    GZIP_OS_DEFAULT()   => 'Unknown',
    ) ;

use constant GZIP_MINIMUM_HEADER =>   pack("C4 V C C",  
        GZIP_ID1, GZIP_ID2, GZIP_CM_DEFLATED, GZIP_FLG_DEFAULT,
        GZIP_MTIME_DEFAULT, GZIP_XFL_DEFAULT, GZIP_OS_DEFAULT) ;


1;
PK     �siZ��Vy;Z  ;Z    Compress/Base/Common.pmnu �[���        package IO::Compress::Base::Common;

use strict ;
use warnings;
use bytes;

use Carp;
use Scalar::Util qw(blessed readonly);
use File::GlobMapper;

require Exporter;
our ($VERSION, @ISA, @EXPORT, %EXPORT_TAGS, $HAS_ENCODE);
@ISA = qw(Exporter);
$VERSION = '2.061';

@EXPORT = qw( isaFilehandle isaFilename isaScalar
              whatIsInput whatIsOutput 
              isaFileGlobString cleanFileGlobString oneTarget
              setBinModeInput setBinModeOutput
              ckInOutParams 
              createSelfTiedObject
              
              isGeMax32

              MAX32

              WANT_CODE
              WANT_EXT
              WANT_UNDEF
              WANT_HASH

              STATUS_OK
              STATUS_ENDSTREAM
              STATUS_EOF
              STATUS_ERROR
          );  

%EXPORT_TAGS = ( Status => [qw( STATUS_OK
                                 STATUS_ENDSTREAM
                                 STATUS_EOF
                                 STATUS_ERROR
                           )]);

                       
use constant STATUS_OK        => 0;
use constant STATUS_ENDSTREAM => 1;
use constant STATUS_EOF       => 2;
use constant STATUS_ERROR     => -1;
use constant MAX16            => 0xFFFF ;  
use constant MAX32            => 0xFFFFFFFF ;  
use constant MAX32cmp         => 0xFFFFFFFF + 1 - 1; # for 5.6.x on 32-bit need to force an non-IV value 
          

sub isGeMax32
{
    return $_[0] >= MAX32cmp ;
}

sub hasEncode()
{
    if (! defined $HAS_ENCODE) {
        eval
        {
            require Encode;
            Encode->import();
        };

        $HAS_ENCODE = $@ ? 0 : 1 ;
    }

    return $HAS_ENCODE;
}

sub getEncoding($$$)
{
    my $obj = shift;
    my $class = shift ;
    my $want_encoding = shift ;

    $obj->croakError("$class: Encode module needed to use -Encode")
        if ! hasEncode();

    my $encoding = Encode::find_encoding($want_encoding);

    $obj->croakError("$class: Encoding '$want_encoding' is not available")
       if ! $encoding;

    return $encoding;
}

our ($needBinmode);
$needBinmode = ($^O eq 'MSWin32' || 
                    ($] >= 5.006 && eval ' ${^UNICODE} || ${^UTF8LOCALE} '))
                    ? 1 : 1 ;

sub setBinModeInput($)
{
    my $handle = shift ;

    binmode $handle 
        if  $needBinmode;
}

sub setBinModeOutput($)
{
    my $handle = shift ;

    binmode $handle
        if  $needBinmode;
}

sub isaFilehandle($)
{
    use utf8; # Pragma needed to keep Perl 5.6.0 happy
    return (defined $_[0] and 
             (UNIVERSAL::isa($_[0],'GLOB') or 
              UNIVERSAL::isa($_[0],'IO::Handle') or
              UNIVERSAL::isa(\$_[0],'GLOB')) 
          )
}

sub isaScalar
{
    return ( defined($_[0]) and ref($_[0]) eq 'SCALAR' and defined ${ $_[0] } ) ;
}

sub isaFilename($)
{
    return (defined $_[0] and 
           ! ref $_[0]    and 
           UNIVERSAL::isa(\$_[0], 'SCALAR'));
}

sub isaFileGlobString
{
    return defined $_[0] && $_[0] =~ /^<.*>$/;
}

sub cleanFileGlobString
{
    my $string = shift ;

    $string =~ s/^\s*<\s*(.*)\s*>\s*$/$1/;

    return $string;
}

use constant WANT_CODE  => 1 ;
use constant WANT_EXT   => 2 ;
use constant WANT_UNDEF => 4 ;
#use constant WANT_HASH  => 8 ;
use constant WANT_HASH  => 0 ;

sub whatIsInput($;$)
{
    my $got = whatIs(@_);
    
    if (defined $got && $got eq 'filename' && defined $_[0] && $_[0] eq '-')
    {
        #use IO::File;
        $got = 'handle';
        $_[0] = *STDIN;
        #$_[0] = new IO::File("<-");
    }

    return $got;
}

sub whatIsOutput($;$)
{
    my $got = whatIs(@_);
    
    if (defined $got && $got eq 'filename' && defined $_[0] && $_[0] eq '-')
    {
        $got = 'handle';
        $_[0] = *STDOUT;
        #$_[0] = new IO::File(">-");
    }
    
    return $got;
}

sub whatIs ($;$)
{
    return 'handle' if isaFilehandle($_[0]);

    my $wantCode = defined $_[1] && $_[1] & WANT_CODE ;
    my $extended = defined $_[1] && $_[1] & WANT_EXT ;
    my $undef    = defined $_[1] && $_[1] & WANT_UNDEF ;
    my $hash     = defined $_[1] && $_[1] & WANT_HASH ;

    return 'undef'  if ! defined $_[0] && $undef ;

    if (ref $_[0]) {
        return ''       if blessed($_[0]); # is an object
        #return ''       if UNIVERSAL::isa($_[0], 'UNIVERSAL'); # is an object
        return 'buffer' if UNIVERSAL::isa($_[0], 'SCALAR');
        return 'array'  if UNIVERSAL::isa($_[0], 'ARRAY')  && $extended ;
        return 'hash'   if UNIVERSAL::isa($_[0], 'HASH')   && $hash ;
        return 'code'   if UNIVERSAL::isa($_[0], 'CODE')   && $wantCode ;
        return '';
    }

    return 'fileglob' if $extended && isaFileGlobString($_[0]);
    return 'filename';
}

sub oneTarget
{
    return $_[0] =~ /^(code|handle|buffer|filename)$/;
}

sub IO::Compress::Base::Validator::new
{
    my $class = shift ;

    my $Class = shift ;
    my $error_ref = shift ;
    my $reportClass = shift ;

    my %data = (Class       => $Class, 
                Error       => $error_ref,
                reportClass => $reportClass, 
               ) ;

    my $obj = bless \%data, $class ;

    local $Carp::CarpLevel = 1;

    my $inType    = $data{inType}    = whatIsInput($_[0], WANT_EXT|WANT_HASH);
    my $outType   = $data{outType}   = whatIsOutput($_[1], WANT_EXT|WANT_HASH);

    my $oneInput  = $data{oneInput}  = oneTarget($inType);
    my $oneOutput = $data{oneOutput} = oneTarget($outType);

    if (! $inType)
    {
        $obj->croakError("$reportClass: illegal input parameter") ;
        #return undef ;
    }    

#    if ($inType eq 'hash')
#    {
#        $obj->{Hash} = 1 ;
#        $obj->{oneInput} = 1 ;
#        return $obj->validateHash($_[0]);
#    }

    if (! $outType)
    {
        $obj->croakError("$reportClass: illegal output parameter") ;
        #return undef ;
    }    


    if ($inType ne 'fileglob' && $outType eq 'fileglob')
    {
        $obj->croakError("Need input fileglob for outout fileglob");
    }    

#    if ($inType ne 'fileglob' && $outType eq 'hash' && $inType ne 'filename' )
#    {
#        $obj->croakError("input must ne filename or fileglob when output is a hash");
#    }    

    if ($inType eq 'fileglob' && $outType eq 'fileglob')
    {
        $data{GlobMap} = 1 ;
        $data{inType} = $data{outType} = 'filename';
        my $mapper = new File::GlobMapper($_[0], $_[1]);
        if ( ! $mapper )
        {
            return $obj->saveErrorString($File::GlobMapper::Error) ;
        }
        $data{Pairs} = $mapper->getFileMap();

        return $obj;
    }
    
    $obj->croakError("$reportClass: input and output $inType are identical")
        if $inType eq $outType && $_[0] eq $_[1] && $_[0] ne '-' ;

    if ($inType eq 'fileglob') # && $outType ne 'fileglob'
    {
        my $glob = cleanFileGlobString($_[0]);
        my @inputs = glob($glob);

        if (@inputs == 0)
        {
            # TODO -- legal or die?
            die "globmap matched zero file -- legal or die???" ;
        }
        elsif (@inputs == 1)
        {
            $obj->validateInputFilenames($inputs[0])
                or return undef;
            $_[0] = $inputs[0]  ;
            $data{inType} = 'filename' ;
            $data{oneInput} = 1;
        }
        else
        {
            $obj->validateInputFilenames(@inputs)
                or return undef;
            $_[0] = [ @inputs ] ;
            $data{inType} = 'filenames' ;
        }
    }
    elsif ($inType eq 'filename')
    {
        $obj->validateInputFilenames($_[0])
            or return undef;
    }
    elsif ($inType eq 'array')
    {
        $data{inType} = 'filenames' ;
        $obj->validateInputArray($_[0])
            or return undef ;
    }

    return $obj->saveErrorString("$reportClass: output buffer is read-only")
        if $outType eq 'buffer' && readonly(${ $_[1] });

    if ($outType eq 'filename' )
    {
        $obj->croakError("$reportClass: output filename is undef or null string")
            if ! defined $_[1] || $_[1] eq ''  ;

        if (-e $_[1])
        {
            if (-d _ )
            {
                return $obj->saveErrorString("output file '$_[1]' is a directory");
            }
        }
    }
    
    return $obj ;
}

sub IO::Compress::Base::Validator::saveErrorString
{
    my $self   = shift ;
    ${ $self->{Error} } = shift ;
    return undef;
    
}

sub IO::Compress::Base::Validator::croakError
{
    my $self   = shift ;
    $self->saveErrorString($_[0]);
    croak $_[0];
}


sub IO::Compress::Base::Validator::validateInputFilenames
{
    my $self = shift ;

    foreach my $filename (@_)
    {
        $self->croakError("$self->{reportClass}: input filename is undef or null string")
            if ! defined $filename || $filename eq ''  ;

        next if $filename eq '-';

        if (! -e $filename )
        {
            return $self->saveErrorString("input file '$filename' does not exist");
        }

        if (-d _ )
        {
            return $self->saveErrorString("input file '$filename' is a directory");
        }

#        if (! -r _ )
#        {
#            return $self->saveErrorString("cannot open file '$filename': $!");
#        }
    }

    return 1 ;
}

sub IO::Compress::Base::Validator::validateInputArray
{
    my $self = shift ;

    if ( @{ $_[0] } == 0 )
    {
        return $self->saveErrorString("empty array reference") ;
    }    

    foreach my $element ( @{ $_[0] } )
    {
        my $inType  = whatIsInput($element);
    
        if (! $inType)
        {
            $self->croakError("unknown input parameter") ;
        }    
        elsif($inType eq 'filename')
        {
            $self->validateInputFilenames($element)
                or return undef ;
        }
        else
        {
            $self->croakError("not a filename") ;
        }
    }

    return 1 ;
}

#sub IO::Compress::Base::Validator::validateHash
#{
#    my $self = shift ;
#    my $href = shift ;
#
#    while (my($k, $v) = each %$href)
#    {
#        my $ktype = whatIsInput($k);
#        my $vtype = whatIsOutput($v, WANT_EXT|WANT_UNDEF) ;
#
#        if ($ktype ne 'filename')
#        {
#            return $self->saveErrorString("hash key not filename") ;
#        }    
#
#        my %valid = map { $_ => 1 } qw(filename buffer array undef handle) ;
#        if (! $valid{$vtype})
#        {
#            return $self->saveErrorString("hash value not ok") ;
#        }    
#    }
#
#    return $self ;
#}

sub createSelfTiedObject
{
    my $class = shift || (caller)[0] ;
    my $error_ref = shift ;

    my $obj = bless Symbol::gensym(), ref($class) || $class;
    tie *$obj, $obj if $] >= 5.005;
    *$obj->{Closed} = 1 ;
    $$error_ref = '';
    *$obj->{Error} = $error_ref ;
    my $errno = 0 ;
    *$obj->{ErrorNo} = \$errno ;

    return $obj;
}


#package Parse::Parameters ;
#
#
#require Exporter;
#our ($VERSION, @ISA, @EXPORT);
#$VERSION = '2.000_08';
#@ISA = qw(Exporter);

$EXPORT_TAGS{Parse} = [qw( ParseParameters 
                           Parse_any Parse_unsigned Parse_signed 
                           Parse_boolean Parse_string
                           Parse_code
                           Parse_writable_scalar
                         )
                      ];              

push @EXPORT, @{ $EXPORT_TAGS{Parse} } ;

use constant Parse_any      => 0x01;
use constant Parse_unsigned => 0x02;
use constant Parse_signed   => 0x04;
use constant Parse_boolean  => 0x08;
use constant Parse_string   => 0x10;
use constant Parse_code     => 0x20;

#use constant Parse_store_ref        => 0x100 ;
#use constant Parse_multiple         => 0x100 ;
use constant Parse_writable         => 0x200 ;
use constant Parse_writable_scalar  => 0x400 | Parse_writable ;

use constant OFF_PARSED     => 0 ;
use constant OFF_TYPE       => 1 ;
use constant OFF_DEFAULT    => 2 ;
use constant OFF_FIXED      => 3 ;
#use constant OFF_FIRST_ONLY => 4 ;
#use constant OFF_STICKY     => 5 ;

use constant IxError => 0;
use constant IxGot   => 1 ;

sub ParseParameters
{
    my $level = shift || 0 ; 

    my $sub = (caller($level + 1))[3] ;
    local $Carp::CarpLevel = 1 ;
    
    return $_[1]
        if @_ == 2 && defined $_[1] && UNIVERSAL::isa($_[1], "IO::Compress::Base::Parameters");
    
    my $p = new IO::Compress::Base::Parameters() ;            
    $p->parse(@_)
        or croak "$sub: $p->[IxError]" ;

    return $p;
}


use strict;

use warnings;
use Carp;


sub Init
{
    my $default = shift ;
    my %got ;
    
    my $obj = IO::Compress::Base::Parameters::new();
    while (my ($key, $v) = each %$default)
    {
        croak "need 2 params [@$v]"
            if @$v != 2 ;

        my ($type, $value) = @$v ;
#        my ($first_only, $sticky, $type, $value) = @$v ;
        my $sticky = 0;
        my $x ;
        $obj->_checkType($key, \$value, $type, 0, \$x) 
            or return undef ;

        $key = lc $key;

#        if (! $sticky) {
#            $x = []
#                if $type & Parse_multiple;

#            $got{$key} = [0, $type, $value, $x, $first_only, $sticky] ;
            $got{$key} = [0, $type, $value, $x] ;            
#        }
#
#        $got{$key}[OFF_PARSED] = 0 ;
    }
    
    return bless \%got, "IO::Compress::Base::Parameters::Defaults" ;
}

sub IO::Compress::Base::Parameters::new
{
    #my $class = shift ;

    my $obj;
    $obj->[IxError] = '';
    $obj->[IxGot] = {} ;          

    return bless $obj, 'IO::Compress::Base::Parameters' ;
}

sub IO::Compress::Base::Parameters::setError
{
    my $self = shift ;
    my $error = shift ;
    my $retval = @_ ? shift : undef ;


    $self->[IxError] = $error ;
    return $retval;
}
          
sub IO::Compress::Base::Parameters::getError
{
    my $self = shift ;
    return $self->[IxError] ;
}
          
sub IO::Compress::Base::Parameters::parse
{
    my $self = shift ;
    my $default = shift ;

    my $got = $self->[IxGot] ;
    my $firstTime = keys %{ $got } == 0 ;

    my (@Bad) ;
    my @entered = () ;

    # Allow the options to be passed as a hash reference or
    # as the complete hash.
    if (@_ == 0) {
        @entered = () ;
    }
    elsif (@_ == 1) {
        my $href = $_[0] ;
    
        return $self->setError("Expected even number of parameters, got 1")
            if ! defined $href or ! ref $href or ref $href ne "HASH" ;
 
        foreach my $key (keys %$href) {
            push @entered, $key ;
            push @entered, \$href->{$key} ;
        }
    }
    else {
       
        my $count = @_;
        return $self->setError("Expected even number of parameters, got $count")
            if $count % 2 != 0 ;
        
        for my $i (0.. $count / 2 - 1) {
            push @entered, $_[2 * $i] ;
            push @entered, \$_[2 * $i + 1] ;
        }
    }

        foreach my $key (keys %$default)
        {
    
            my ($type, $value) = @{ $default->{$key} } ;
  
            if ($firstTime) {   
                $got->{$key} = [0, $type, $value, $value] ;               
            }
            else
            {
                $got->{$key}[OFF_PARSED] = 0 ;      
            }               
        }


    my %parsed = ();
    
   
    for my $i (0.. @entered / 2 - 1) {
        my $key = $entered[2* $i] ;
        my $value = $entered[2* $i+1] ;

        #print "Key [$key] Value [$value]" ;
        #print defined $$value ? "[$$value]\n" : "[undef]\n";

        $key =~ s/^-// ;
        my $canonkey = lc $key;
 
        if ($got->{$canonkey})                                  
        {
            my $type = $got->{$canonkey}[OFF_TYPE] ;
            my $parsed = $parsed{$canonkey};
            ++ $parsed{$canonkey};

            return $self->setError("Muliple instances of '$key' found") 
                if $parsed ; 

            my $s ;
            $self->_checkType($key, $value, $type, 1, \$s)
                or return undef ;

            $value = $$value ;
            $got->{$canonkey} = [1, $type, $value, $s] ;

        }
        else
          { push (@Bad, $key) }
    }
 
    if (@Bad) {
        my ($bad) = join(", ", @Bad) ;
        return $self->setError("unknown key value(s) $bad") ;
    }

    return 1;
}

sub IO::Compress::Base::Parameters::_checkType
{
    my $self = shift ;

    my $key   = shift ;
    my $value = shift ;
    my $type  = shift ;
    my $validate  = shift ;
    my $output  = shift;

    #local $Carp::CarpLevel = $level ;
    #print "PARSE $type $key $value $validate $sub\n" ;

    if ($type & Parse_writable_scalar)
    {
        return $self->setError("Parameter '$key' not writable")
            if  readonly $$value ;

        if (ref $$value) 
        {
            return $self->setError("Parameter '$key' not a scalar reference")
                if ref $$value ne 'SCALAR' ;

            $$output = $$value ;
        }
        else  
        {
            return $self->setError("Parameter '$key' not a scalar")
                if ref $value ne 'SCALAR' ;

            $$output = $value ;
        }

        return 1;
    }


    $value = $$value ;

    if ($type & Parse_any)
    {
        $$output = $value ;
        return 1;
    }
    elsif ($type & Parse_unsigned)
    {
     
        return $self->setError("Parameter '$key' must be an unsigned int, got 'undef'")
            if ! defined $value ;
        return $self->setError("Parameter '$key' must be an unsigned int, got '$value'")
            if $value !~ /^\d+$/;
    
        $$output = defined $value ? $value : 0 ;    
        return 1;
    }
    elsif ($type & Parse_signed)
    {
        return $self->setError("Parameter '$key' must be a signed int, got 'undef'")
            if ! defined $value ;
        return $self->setError("Parameter '$key' must be a signed int, got '$value'")
            if $value !~ /^-?\d+$/;

        $$output = defined $value ? $value : 0 ;    
        return 1 ;
    }
    elsif ($type & Parse_boolean)
    {
        return $self->setError("Parameter '$key' must be an int, got '$value'")
            if defined $value && $value !~ /^\d*$/;

        $$output =  defined $value && $value != 0 ? 1 : 0 ;    
        return 1;
    }

    elsif ($type & Parse_string)
    {
        $$output = defined $value ? $value : "" ;    
        return 1;
    }
    elsif ($type & Parse_code)
    {
        return $self->setError("Parameter '$key' must be a code reference, got '$value'")
            if (! defined $value || ref $value ne 'CODE') ;

        $$output = defined $value ? $value : "" ;    
        return 1;
    }
    
    $$output = $value ;
    return 1;
}

sub IO::Compress::Base::Parameters::parsed
{
    return $_[0]->[IxGot]{$_[1]}[OFF_PARSED] ;
}


sub IO::Compress::Base::Parameters::getValue
{
    return  $_[0]->[IxGot]{$_[1]}[OFF_FIXED] ;
}
sub IO::Compress::Base::Parameters::setValue
{
    $_[0]->[IxGot]{$_[1]}[OFF_PARSED]  = 1;
    $_[0]->[IxGot]{$_[1]}[OFF_DEFAULT] = $_[2] ;
    $_[0]->[IxGot]{$_[1]}[OFF_FIXED]   = $_[2] ;            
}

sub IO::Compress::Base::Parameters::valueRef
{
    return  $_[0]->[IxGot]{$_[1]}[OFF_FIXED]  ;
}

sub IO::Compress::Base::Parameters::valueOrDefault
{
    my $self = shift ;
    my $name = shift ;
    my $default = shift ;

    my $value = $self->[IxGot]{$name}[OFF_DEFAULT] ;
    
    return $value if defined $value ;
    return $default ;
}

sub IO::Compress::Base::Parameters::wantValue
{
    return defined $_[0]->[IxGot]{$_[1]}[OFF_DEFAULT] ;
}

sub IO::Compress::Base::Parameters::clone
{
    my $self = shift ;
    my $obj = [] ;
    my %got ;

    my $hash = $self->[IxGot] ;
    for my $k (keys %{ $hash })
    {
        $got{$k} = [ @{ $hash->{$k} } ];
    }

    $obj->[IxError] = $self->[IxError];
    $obj->[IxGot] = \%got ;

    return bless $obj, 'IO::Compress::Base::Parameters' ;
}

package U64;

use constant MAX32 => 0xFFFFFFFF ;
use constant HI_1 => MAX32 + 1 ;
use constant LOW   => 0 ;
use constant HIGH  => 1;

sub new
{
    return bless [ 0, 0 ], $_[0]
        if @_ == 1 ;
        
    return bless [ $_[1], 0 ], $_[0]
        if @_ == 2 ;
        
    return bless [ $_[2], $_[1] ], $_[0]      
        if @_ == 3 ;  
}

sub newUnpack_V64
{
    my ($low, $hi) = unpack "V V", $_[0] ;
    bless [ $low, $hi ], "U64";
}

sub newUnpack_V32
{
    my $string = shift;

    my $low = unpack "V", $string ;
    bless [ $low, 0 ], "U64";
}

sub reset
{
    $_[0]->[HIGH] = $_[0]->[LOW] = 0;
}

sub clone
{
    bless [ @{$_[0]}  ], ref $_[0] ;    
}

sub getHigh
{
    return $_[0]->[HIGH];
}

sub getLow
{
    return $_[0]->[LOW];
}

sub get32bit
{
    return $_[0]->[LOW];
}

sub get64bit
{
    # Not using << here because the result will still be
    # a 32-bit value on systems where int size is 32-bits
    return $_[0]->[HIGH] * HI_1 + $_[0]->[LOW];
}

sub add
{
#    my $self = shift;
    my $value = $_[1];

    if (ref $value eq 'U64') {
        $_[0]->[HIGH] += $value->[HIGH] ;
        $value = $value->[LOW];
    }
    elsif ($value > MAX32) {      
        $_[0]->[HIGH] += int($value / HI_1) ;
        $value = $value % HI_1;
    }
     
    my $available = MAX32 - $_[0]->[LOW] ;
 
    if ($value > $available) {
       ++ $_[0]->[HIGH] ;
       $_[0]->[LOW] = $value - $available - 1;
    }
    else {
       $_[0]->[LOW] += $value ;
    }
}

sub add32
{
#    my $self = shift;
    my $value = $_[1];

    if ($value > MAX32) {      
        $_[0]->[HIGH] += int($value / HI_1) ;
        $value = $value % HI_1;
    }
     
    my $available = MAX32 - $_[0]->[LOW] ;
 
    if ($value > $available) {
       ++ $_[0]->[HIGH] ;
       $_[0]->[LOW] = $value - $available - 1;
    }
    else {
       $_[0]->[LOW] += $value ;
    }
}

sub subtract
{
    my $self = shift;
    my $value = shift;

    if (ref $value eq 'U64') {

        if ($value->[HIGH]) {
            die "bad"
                if $self->[HIGH] == 0 ||
                   $value->[HIGH] > $self->[HIGH] ;

           $self->[HIGH] -= $value->[HIGH] ;
        }

        $value = $value->[LOW] ;
    }

    if ($value > $self->[LOW]) {
       -- $self->[HIGH] ;
       $self->[LOW] = MAX32 - $value + $self->[LOW] + 1 ;
    }
    else {
       $self->[LOW] -= $value;
    }
}

sub equal
{
    my $self = shift;
    my $other = shift;

    return $self->[LOW]  == $other->[LOW] &&
           $self->[HIGH] == $other->[HIGH] ;
}

sub gt
{
    my $self = shift;
    my $other = shift;

    return $self->cmp($other) > 0 ;
}

sub cmp
{
    my $self = shift;
    my $other = shift ;

    if ($self->[LOW] == $other->[LOW]) {
        return $self->[HIGH] - $other->[HIGH] ;
    }
    else {
        return $self->[LOW] - $other->[LOW] ;
    }
}
    

sub is64bit
{
    return $_[0]->[HIGH] > 0 ;
}

sub isAlmost64bit
{
    return $_[0]->[HIGH] > 0 ||  $_[0]->[LOW] == MAX32 ;
}

sub getPacked_V64
{
    return pack "V V", @{ $_[0] } ;
}

sub getPacked_V32
{
    return pack "V", $_[0]->[LOW] ;
}

sub pack_V64
{
    return pack "V V", $_[0], 0;
}


sub full32 
{
    return $_[0] == MAX32 ;
}

sub Value_VV64
{
    my $buffer = shift;

    my ($lo, $hi) = unpack ("V V" , $buffer);
    no warnings 'uninitialized';
    return $hi * HI_1 + $lo;
}


package IO::Compress::Base::Common;

1;
PK     �siZ,/�rO  rO    Compress/FAQ.podnu �[���        
=head1 NAME

IO::Compress::FAQ -- Frequently Asked Questions about IO::Compress

=head1 DESCRIPTION

Common questions answered.

=head1 GENERAL 

=head2 Compatibility with Unix compress/uncompress.

Although C<Compress::Zlib> has a pair of functions called C<compress> and
C<uncompress>, they are I<not> related to the Unix programs of the same
name. The C<Compress::Zlib> module is not compatible with Unix
C<compress>.

If you have the C<uncompress> program available, you can use this to read
compressed files

    open F, "uncompress -c $filename |";
    while (<F>)
    {
        ...

Alternatively, if you have the C<gunzip> program available, you can use
this to read compressed files

    open F, "gunzip -c $filename |";
    while (<F>)
    {
        ...

and this to write compress files, if you have the C<compress> program
available

    open F, "| compress -c $filename ";
    print F "data";
    ...
    close F ;

=head2 Accessing .tar.Z files

The C<Archive::Tar> module can optionally use C<Compress::Zlib> (via the
C<IO::Zlib> module) to access tar files that have been compressed with
C<gzip>. Unfortunately tar files compressed with the Unix C<compress>
utility cannot be read by C<Compress::Zlib> and so cannot be directly
accessed by C<Archive::Tar>.

If the C<uncompress> or C<gunzip> programs are available, you can use one
of these workarounds to read C<.tar.Z> files from C<Archive::Tar>

Firstly with C<uncompress>

    use strict;
    use warnings;
    use Archive::Tar;

    open F, "uncompress -c $filename |";
    my $tar = Archive::Tar->new(*F);
    ...

and this with C<gunzip>

    use strict;
    use warnings;
    use Archive::Tar;

    open F, "gunzip -c $filename |";
    my $tar = Archive::Tar->new(*F);
    ...

Similarly, if the C<compress> program is available, you can use this to
write a C<.tar.Z> file

    use strict;
    use warnings;
    use Archive::Tar;
    use IO::File;

    my $fh = new IO::File "| compress -c >$filename";
    my $tar = Archive::Tar->new();
    ...
    $tar->write($fh);
    $fh->close ;

=head2 How do I recompress using a different compression?

This is easier that you might expect if you realise that all the
C<IO::Compress::*> objects are derived from C<IO::File> and that all the
C<IO::Uncompress::*> modules can read from an C<IO::File> filehandle.

So, for example, say you have a file compressed with gzip that you want to
recompress with bzip2. Here is all that is needed to carry out the
recompression.

    use IO::Uncompress::Gunzip ':all';
    use IO::Compress::Bzip2 ':all';

    my $gzipFile = "somefile.gz";
    my $bzipFile = "somefile.bz2";

    my $gunzip = new IO::Uncompress::Gunzip $gzipFile
        or die "Cannot gunzip $gzipFile: $GunzipError\n" ;

    bzip2 $gunzip => $bzipFile 
        or die "Cannot bzip2 to $bzipFile: $Bzip2Error\n" ;

Note, there is a limitation of this technique. Some compression file
formats store extra information along with the compressed data payload. For
example, gzip can optionally store the original filename and Zip stores a
lot of information about the original file. If the original compressed file
contains any of this extra information, it will not be transferred to the
new compressed file usign the technique above.

=head1 ZIP

=head2 What Compression Types do IO::Compress::Zip & IO::Uncompress::Unzip support?

The following compression formats are supported by C<IO::Compress::Zip> and
C<IO::Uncompress::Unzip>

=over 5

=item * Store (method 0)

No compression at all.

=item * Deflate (method 8)

This is the default compression used when creating a zip file with
C<IO::Compress::Zip>.

=item * Bzip2 (method 12)

Only supported if the C<IO-Compress-Bzip2> module is installed.

=item * Lzma (method 14)

Only supported if the C<IO-Compress-Lzma> module is installed.

=back

=head2 Can I Read/Write Zip files larger the 4 Gig?

Yes, both the C<IO-Compress-Zip> and C<IO-Uncompress-Unzip>  modules
support the zip feature called I<Zip64>. That allows them to read/write
files/buffers larger than 4Gig. 

If you are creating a Zip file using the one-shot interface, and any of the
input files is greater than 4Gig, a zip64 complaint zip file will be
created. 

    zip "really-large-file" => "my.zip";

Similarly with the one-shot interface, if the input is a buffer larger than
4 Gig, a zip64 complaint zip file will be created. 

    zip \$really_large_buffer => "my.zip";

The one-shot interface allows you to force the creation of a zip64 zip file
by including the C<Zip64> option.

    zip $filehandle => "my.zip", Zip64 => 1;

If you want to create a zip64 zip file with the OO interface you must
specify the C<Zip64> option.

    my $zip = new IO::Compress::Zip "whatever", Zip64 => 1;
	
When uncompressing with C<IO-Uncompress-Unzip>, it will automatically
detect if the zip file is zip64.

If you intend to manipulate the Zip64 zip files created with
C<IO-Compress-Zip> using an external zip/unzip, make sure that it supports
Zip64.  

In particular, if you are using Info-Zip you need to have zip version 3.x
or better to update a Zip64 archive and unzip version 6.x to read a zip64
archive. 

=head2 Can I write more that 64K entries is a Zip files?

Yes. Zip64 allows this. See previous question.

=head2 Zip Resources

The primary reference for zip files is the "appnote" document available at
L<http://www.pkware.com/documents/casestudies/APPNOTE.TXT>

An alternatively is the Info-Zip appnote. This is available from
L<ftp://ftp.info-zip.org/pub/infozip/doc/>

=head1 GZIP

=head2 Gzip Resources

The primary reference for gzip files is RFC 1952
L<http://www.faqs.org/rfcs/rfc1952.html>

The primary site for gzip is F<http://www.gzip.org>.

=head2 Dealing with Concatenated gzip files

If the gunzip program encounters a file containing multiple gzip files
concatenated together it will automatically uncompress them all.
The example below illustrates this behaviour

    $ echo abc | gzip -c >x.gz
    $ echo def | gzip -c >>x.gz
    $ gunzip -c x.gz 
    abc
    def

By default C<IO::Uncompress::Gunzip> will I<not> bahave like the gunzip
program. It will only uncompress the first gzip data stream in the file, as
shown below

    $ perl -MIO::Uncompress::Gunzip=:all -e 'gunzip "x.gz" => \*STDOUT'
    abc

To force C<IO::Uncompress::Gunzip> to uncompress all the gzip data streams,
include the C<MultiStream> option, as shown below

    $ perl -MIO::Uncompress::Gunzip=:all -e 'gunzip "x.gz" => \*STDOUT, MultiStream => 1'
    abc
    def

=head1 ZLIB

=head2 Zlib Resources

The primary site for the I<zlib> compression library is
F<http://www.zlib.org>.

=head1 Bzip2

=head2 Bzip2 Resources

The primary site for bzip2 is F<http://www.bzip.org>.

=head2 Dealing with Concatenated bzip2 files

If the bunzip2 program encounters a file containing multiple bzip2 files
concatenated together it will automatically uncompress them all.
The example below illustrates this behaviour

    $ echo abc | bzip2 -c >x.bz2
    $ echo def | bzip2 -c >>x.bz2
    $ bunzip2 -c x.bz2
    abc
    def

By default C<IO::Uncompress::Bunzip2> will I<not> bahave like the bunzip2
program. It will only uncompress the first bunzip2 data stream in the file, as
shown below

    $ perl -MIO::Uncompress::Bunzip2=:all -e 'bunzip2 "x.bz2" => \*STDOUT'
    abc

To force C<IO::Uncompress::Bunzip2> to uncompress all the bzip2 data streams,
include the C<MultiStream> option, as shown below

    $ perl -MIO::Uncompress::Bunzip2=:all -e 'bunzip2 "x.bz2" => \*STDOUT, MultiStream => 1'
    abc
    def

=head2 Interoperating with Pbzip2

Pbzip2 (L<http://compression.ca/pbzip2/>) is a parallel implementation of
bzip2. The output from pbzip2 consists of a series of concatenated bzip2
data streams.

By default C<IO::Uncompress::Bzip2> will only uncompress the first bzip2
data stream in a pbzip2 file. To uncompress the complete pbzip2 file you
must include the C<MultiStream> option, like this.

    bunzip2 $input => \$output, MultiStream => 1 
        or die "bunzip2 failed: $Bunzip2Error\n";

=head1 HTTP & NETWORK

=head2 Apache::GZip Revisited

Below is a mod_perl Apache compression module, called C<Apache::GZip>,
taken from
F<http://perl.apache.org/docs/tutorials/tips/mod_perl_tricks/mod_perl_tricks.html#On_the_Fly_Compression>

  package Apache::GZip;
  #File: Apache::GZip.pm
  
  use strict vars;
  use Apache::Constants ':common';
  use Compress::Zlib;
  use IO::File;
  use constant GZIP_MAGIC => 0x1f8b;
  use constant OS_MAGIC => 0x03;
  
  sub handler {
      my $r = shift;
      my ($fh,$gz);
      my $file = $r->filename;
      return DECLINED unless $fh=IO::File->new($file);
      $r->header_out('Content-Encoding'=>'gzip');
      $r->send_http_header;
      return OK if $r->header_only;
  
      tie *STDOUT,'Apache::GZip',$r;
      print($_) while <$fh>;
      untie *STDOUT;
      return OK;
  }
  
  sub TIEHANDLE {
      my($class,$r) = @_;
      # initialize a deflation stream
      my $d = deflateInit(-WindowBits=>-MAX_WBITS()) || return undef;
  
      # gzip header -- don't ask how I found out
      $r->print(pack("nccVcc",GZIP_MAGIC,Z_DEFLATED,0,time(),0,OS_MAGIC));
  
      return bless { r   => $r,
                     crc =>  crc32(undef),
                     d   => $d,
                     l   =>  0 
                   },$class;
  }
  
  sub PRINT {
      my $self = shift;
      foreach (@_) {
        # deflate the data
        my $data = $self->{d}->deflate($_);
        $self->{r}->print($data);
        # keep track of its length and crc
        $self->{l} += length($_);
        $self->{crc} = crc32($_,$self->{crc});
      }
  }
  
  sub DESTROY {
     my $self = shift;
     
     # flush the output buffers
     my $data = $self->{d}->flush;
     $self->{r}->print($data);
     
     # print the CRC and the total length (uncompressed)
     $self->{r}->print(pack("LL",@{$self}{qw/crc l/}));
  }
   
  1;

Here's the Apache configuration entry you'll need to make use of it.  Once
set it will result in everything in the /compressed directory will be
compressed automagically.

  <Location /compressed>
     SetHandler  perl-script
     PerlHandler Apache::GZip
  </Location>

Although at first sight there seems to be quite a lot going on in
C<Apache::GZip>, you could sum up what the code was doing as follows --
read the contents of the file in C<< $r->filename >>, compress it and write
the compressed data to standard output. That's all.

This code has to jump through a few hoops to achieve this because

=over

=item 1.

The gzip support in C<Compress::Zlib> version 1.x can only work with a real
filesystem filehandle. The filehandles used by Apache modules are not
associated with the filesystem.

=item 2.

That means all the gzip support has to be done by hand - in this case by
creating a tied filehandle to deal with creating the gzip header and
trailer.

=back

C<IO::Compress::Gzip> doesn't have that filehandle limitation (this was one
of the reasons for writing it in the first place). So if
C<IO::Compress::Gzip> is used instead of C<Compress::Zlib> the whole tied
filehandle code can be removed. Here is the rewritten code.

  package Apache::GZip;
  
  use strict vars;
  use Apache::Constants ':common';
  use IO::Compress::Gzip;
  use IO::File;
  
  sub handler {
      my $r = shift;
      my ($fh,$gz);
      my $file = $r->filename;
      return DECLINED unless $fh=IO::File->new($file);
      $r->header_out('Content-Encoding'=>'gzip');
      $r->send_http_header;
      return OK if $r->header_only;

      my $gz = new IO::Compress::Gzip '-', Minimal => 1
          or return DECLINED ;

      print $gz $_ while <$fh>;
  
      return OK;
  }
  
or even more succinctly, like this, using a one-shot gzip

  package Apache::GZip;
  
  use strict vars;
  use Apache::Constants ':common';
  use IO::Compress::Gzip qw(gzip);
  
  sub handler {
      my $r = shift;
      $r->header_out('Content-Encoding'=>'gzip');
      $r->send_http_header;
      return OK if $r->header_only;

      gzip $r->filename => '-', Minimal => 1
        or return DECLINED ;

      return OK;
  }
   
  1;

The use of one-shot C<gzip> above just reads from C<< $r->filename >> and
writes the compressed data to standard output.

Note the use of the C<Minimal> option in the code above. When using gzip
for Content-Encoding you should I<always> use this option. In the example
above it will prevent the filename being included in the gzip header and
make the size of the gzip data stream a slight bit smaller.

=head2 Compressed files and Net::FTP

The C<Net::FTP> module provides two low-level methods called C<stor> and
C<retr> that both return filehandles. These filehandles can used with the
C<IO::Compress/Uncompress> modules to compress or uncompress files read
from or written to an FTP Server on the fly, without having to create a
temporary file.

Firstly, here is code that uses C<retr> to uncompressed a file as it is
read from the FTP Server.

    use Net::FTP;
    use IO::Uncompress::Gunzip qw(:all);

    my $ftp = new Net::FTP ...

    my $retr_fh = $ftp->retr($compressed_filename);
    gunzip $retr_fh => $outFilename, AutoClose => 1
        or die "Cannot uncompress '$compressed_file': $GunzipError\n";

and this to compress a file as it is written to the FTP Server 

    use Net::FTP;
    use IO::Compress::Gzip qw(:all);

    my $stor_fh = $ftp->stor($filename);
    gzip "filename" => $stor_fh, AutoClose => 1
        or die "Cannot compress '$filename': $GzipError\n";

=head1 MISC

=head2 Using C<InputLength> to uncompress data embedded in a larger file/buffer.

A fairly common use-case is where compressed data is embedded in a larger
file/buffer and you want to read both.

As an example consider the structure of a zip file. This is a well-defined
file format that mixes both compressed and uncompressed sections of data in
a single file. 

For the purposes of this discussion you can think of a zip file as sequence
of compressed data streams, each of which is prefixed by an uncompressed
local header. The local header contains information about the compressed
data stream, including the name of the compressed file and, in particular,
the length of the compressed data stream. 

To illustrate how to use C<InputLength> here is a script that walks a zip
file and prints out how many lines are in each compressed file (if you
intend write code to walking through a zip file for real see
L<IO::Uncompress::Unzip/"Walking through a zip file"> ). Also, although
this example uses the zlib-based compression, the technique can be used by
the other C<IO::Uncompress::*> modules.

    use strict;
    use warnings;

    use IO::File;
    use IO::Uncompress::RawInflate qw(:all);

    use constant ZIP_LOCAL_HDR_SIG  => 0x04034b50;
    use constant ZIP_LOCAL_HDR_LENGTH => 30;

    my $file = $ARGV[0] ;

    my $fh = new IO::File "<$file"
                or die "Cannot open '$file': $!\n";

    while (1)
    {
        my $sig;
        my $buffer;

        my $x ;
        ($x = $fh->read($buffer, ZIP_LOCAL_HDR_LENGTH)) == ZIP_LOCAL_HDR_LENGTH 
            or die "Truncated file: $!\n";

        my $signature = unpack ("V", substr($buffer, 0, 4));

        last unless $signature == ZIP_LOCAL_HDR_SIG;

        # Read Local Header
        my $gpFlag             = unpack ("v", substr($buffer, 6, 2));
        my $compressedMethod   = unpack ("v", substr($buffer, 8, 2));
        my $compressedLength   = unpack ("V", substr($buffer, 18, 4));
        my $uncompressedLength = unpack ("V", substr($buffer, 22, 4));
        my $filename_length    = unpack ("v", substr($buffer, 26, 2)); 
        my $extra_length       = unpack ("v", substr($buffer, 28, 2));

        my $filename ;
        $fh->read($filename, $filename_length) == $filename_length 
            or die "Truncated file\n";

        $fh->read($buffer, $extra_length) == $extra_length
            or die "Truncated file\n";

        if ($compressedMethod != 8 && $compressedMethod != 0)
        {
            warn "Skipping file '$filename' - not deflated $compressedMethod\n";
            $fh->read($buffer, $compressedLength) == $compressedLength
                or die "Truncated file\n";
            next;
        }

        if ($compressedMethod == 0 && $gpFlag & 8 == 8)
        {
            die "Streamed Stored not supported for '$filename'\n";
        }

        next if $compressedLength == 0;

        # Done reading the Local Header

        my $inf = new IO::Uncompress::RawInflate $fh,
                            Transparent => 1,
                            InputLength => $compressedLength
          or die "Cannot uncompress $file [$filename]: $RawInflateError\n"  ;

        my $line_count = 0;

        while (<$inf>)
        {
            ++ $line_count;
        }

        print "$filename: $line_count\n";
    }

The majority of the code above is concerned with reading the zip local
header data. The code that I want to focus on is at the bottom. 

    while (1) {
    
        # read local zip header data
        # get $filename
        # get $compressedLength

        my $inf = new IO::Uncompress::RawInflate $fh,
                            Transparent => 1,
                            InputLength => $compressedLength
          or die "Cannot uncompress $file [$filename]: $RawInflateError\n"  ;

        my $line_count = 0;

        while (<$inf>)
        {
            ++ $line_count;
        }

        print "$filename: $line_count\n";
    }

The call to C<IO::Uncompress::RawInflate> creates a new filehandle C<$inf>
that can be used to read from the parent filehandle C<$fh>, uncompressing
it as it goes. The use of the C<InputLength> option will guarantee that
I<at most> C<$compressedLength> bytes of compressed data will be read from
the C<$fh> filehandle (The only exception is for an error case like a
truncated file or a corrupt data stream).

This means that once RawInflate is finished C<$fh> will be left at the
byte directly after the compressed data stream. 

Now consider what the code looks like without C<InputLength> 

    while (1) {
    
        # read local zip header data
        # get $filename
        # get $compressedLength

        # read all the compressed data into $data
        read($fh, $data, $compressedLength);

        my $inf = new IO::Uncompress::RawInflate \$data,
                            Transparent => 1,
          or die "Cannot uncompress $file [$filename]: $RawInflateError\n"  ;

        my $line_count = 0;

        while (<$inf>)
        {
            ++ $line_count;
        }

        print "$filename: $line_count\n";
    }

The difference here is the addition of the temporary variable C<$data>.
This is used to store a copy of the compressed data while it is being
uncompressed.

If you know that C<$compressedLength> isn't that big then using temporary
storage won't be a problem. But if C<$compressedLength> is very large or
you are writing an application that other people will use, and so have no
idea how big C<$compressedLength> will be, it could be an issue.

Using C<InputLength> avoids the use of temporary storage and means the
application can cope with large compressed data streams.

One final point -- obviously C<InputLength> can only be used whenever you
know the length of the compressed data beforehand, like here with a zip
file. 

=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::Lzop>, L<IO::Uncompress::UnLzop>, L<IO::Compress::Lzf>, L<IO::Uncompress::UnLzf>, 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, F<pmqs@cpan.org>. 

=head1 MODIFICATION HISTORY

See the Changes file.

=head1 COPYRIGHT AND LICENSE

Copyright (c) 2005-2013 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     �siZ]�H  H    Compress/Adapter/Deflate.pmnu �[���        package IO::Compress::Adapter::Deflate ;

use strict;
use warnings;
use bytes;

use IO::Compress::Base::Common 2.061 qw(:Status);
use Compress::Raw::Zlib  2.061 qw( !crc32 !adler32 ) ;
                                  
require Exporter;                                     
our ($VERSION, @ISA, @EXPORT_OK, %EXPORT_TAGS, @EXPORT, %DEFLATE_CONSTANTS);

$VERSION = '2.061';
@ISA = qw(Exporter);
@EXPORT_OK = @Compress::Raw::Zlib::DEFLATE_CONSTANTS;
%EXPORT_TAGS = %Compress::Raw::Zlib::DEFLATE_CONSTANTS;
@EXPORT = @EXPORT_OK;
%DEFLATE_CONSTANTS = %EXPORT_TAGS ;

sub mkCompObject
{
    my $crc32    = shift ;
    my $adler32  = shift ;
    my $level    = shift ;
    my $strategy = shift ;

    my ($def, $status) = new Compress::Raw::Zlib::Deflate
                                -AppendOutput   => 1,
                                -CRC32          => $crc32,
                                -ADLER32        => $adler32,
                                -Level          => $level,
                                -Strategy       => $strategy,
                                -WindowBits     => - MAX_WBITS;

    return (undef, "Cannot create Deflate object: $status", $status) 
        if $status != Z_OK;    

    return bless {'Def'        => $def,
                  'Error'      => '',
                 } ;     
}

sub compr
{
    my $self = shift ;

    my $def   = $self->{Def};

    my $status = $def->deflate($_[0], $_[1]) ;
    $self->{ErrorNo} = $status;

    if ($status != Z_OK)
    {
        $self->{Error} = "Deflate Error: $status"; 
        return STATUS_ERROR;
    }

    return STATUS_OK;    
}

sub flush
{
    my $self = shift ;

    my $def   = $self->{Def};

    my $opt = $_[1] || Z_FINISH;
    my $status = $def->flush($_[0], $opt);
    $self->{ErrorNo} = $status;

    if ($status != Z_OK)
    {
        $self->{Error} = "Deflate Error: $status"; 
        return STATUS_ERROR;
    }

    return STATUS_OK;        
}

sub close
{
    my $self = shift ;

    my $def   = $self->{Def};

    $def->flush($_[0], Z_FINISH)
        if defined $def ;
}

sub reset
{
    my $self = shift ;

    my $def   = $self->{Def};

    my $status = $def->deflateReset() ;
    $self->{ErrorNo} = $status;
    if ($status != Z_OK)
    {
        $self->{Error} = "Deflate Error: $status"; 
        return STATUS_ERROR;
    }

    return STATUS_OK;    
}

sub deflateParams 
{
    my $self = shift ;

    my $def   = $self->{Def};

    my $status = $def->deflateParams(@_);
    $self->{ErrorNo} = $status;
    if ($status != Z_OK)
    {
        $self->{Error} = "deflateParams Error: $status"; 
        return STATUS_ERROR;
    }

    return STATUS_OK;   
}


#sub total_out
#{
#    my $self = shift ;
#    $self->{Def}->total_out();
#}
#
#sub total_in
#{
#    my $self = shift ;
#    $self->{Def}->total_in();
#}

sub compressedBytes
{
    my $self = shift ;

    $self->{Def}->compressedBytes();
}

sub uncompressedBytes
{
    my $self = shift ;
    $self->{Def}->uncompressedBytes();
}


sub crc32
{
    my $self = shift ;
    $self->{Def}->crc32();
}

sub adler32
{
    my $self = shift ;
    $self->{Def}->adler32();
}


1;

__END__

PK     �siZB6���  �    Compress/Adapter/Identity.pmnu �[���        package IO::Compress::Adapter::Identity ;

use strict;
use warnings;
use bytes;

use IO::Compress::Base::Common  2.061 qw(:Status);
our ($VERSION);

$VERSION = '2.061';

sub mkCompObject
{
    my $level    = shift ;
    my $strategy = shift ;

    return bless {
                  'CompSize'   => 0,
                  'UnCompSize' => 0,
                  'Error'      => '',
                  'ErrorNo'    => 0,
                 } ;     
}

sub compr
{
    my $self = shift ;

    if (defined ${ $_[0] } && length ${ $_[0] }) {
        $self->{CompSize} += length ${ $_[0] } ;
        $self->{UnCompSize} = $self->{CompSize} ;

        if ( ref $_[1] ) 
          { ${ $_[1] } .= ${ $_[0] } }
        else
          { $_[1] .= ${ $_[0] } }
    }

    return STATUS_OK ;
}

sub flush
{
    my $self = shift ;

    return STATUS_OK;    
}

sub close
{
    my $self = shift ;

    return STATUS_OK;    
}

sub reset
{
    my $self = shift ;

    $self->{CompSize}   = 0;
    $self->{UnCompSize} = 0;

    return STATUS_OK;    
}

sub deflateParams 
{
    my $self = shift ;

    return STATUS_OK;   
}

#sub total_out
#{
#    my $self = shift ;
#    return $self->{UnCompSize} ;
#}
#
#sub total_in
#{
#    my $self = shift ;
#    return $self->{UnCompSize} ;
#}

sub compressedBytes
{
    my $self = shift ;
    return $self->{UnCompSize} ;
}

sub uncompressedBytes
{
    my $self = shift ;
    return $self->{UnCompSize} ;
}

1;


__END__

PK     �siZa�$
  $
    Compress/Adapter/Bzip2.pmnu �[���        package IO::Compress::Adapter::Bzip2 ;

use strict;
use warnings;
use bytes;

use IO::Compress::Base::Common  2.061 qw(:Status);

use Compress::Raw::Bzip2  2.061 ;

our ($VERSION);
$VERSION = '2.061';

sub mkCompObject
{
    my $BlockSize100K = shift ;
    my $WorkFactor = shift ;
    my $Verbosity  = shift ;

    $BlockSize100K = 1 if ! defined $BlockSize100K ;
    $WorkFactor    = 0 if ! defined $WorkFactor ;
    $Verbosity     = 0 if ! defined $Verbosity ;

    my ($def, $status) = new Compress::Raw::Bzip2(1, $BlockSize100K,
                                                 $WorkFactor, $Verbosity);

    return (undef, "Could not create Deflate object: $status", $status)
        if $status != BZ_OK ;

    return bless {'Def'        => $def,
                  'Error'      => '',
                  'ErrorNo'    => 0,
                 }  ;     
}

sub compr
{
    my $self = shift ;

    my $def   = $self->{Def};

    my $status = $def->bzdeflate($_[0], $_[1]) ;
    $self->{ErrorNo} = $status;

    if ($status != BZ_RUN_OK)
    {
        $self->{Error} = "Deflate Error: $status"; 
        return STATUS_ERROR;
    }

    return STATUS_OK;    
}

sub flush
{
    my $self = shift ;

    my $def   = $self->{Def};

    my $status = $def->bzflush($_[0]);
    $self->{ErrorNo} = $status;

    if ($status != BZ_RUN_OK)
    {
        $self->{Error} = "Deflate Error: $status"; 
        return STATUS_ERROR;
    }

    return STATUS_OK;    
    
}

sub close
{
    my $self = shift ;

    my $def   = $self->{Def};

    my $status = $def->bzclose($_[0]);
    $self->{ErrorNo} = $status;

    if ($status != BZ_STREAM_END)
    {
        $self->{Error} = "Deflate Error: $status"; 
        return STATUS_ERROR;
    }

    return STATUS_OK;    
    
}


sub reset
{
    my $self = shift ;

    my $outer = $self->{Outer};

    my ($def, $status) = new Compress::Raw::Bzip2();
    $self->{ErrorNo} = ($status == BZ_OK) ? 0 : $status ;

    if ($status != BZ_OK)
    {
        $self->{Error} = "Cannot create Deflate object: $status"; 
        return STATUS_ERROR;
    }

    $self->{Def} = $def;

    return STATUS_OK;    
}

sub compressedBytes
{
    my $self = shift ;
    $self->{Def}->compressedBytes();
}

sub uncompressedBytes
{
    my $self = shift ;
    $self->{Def}->uncompressedBytes();
}

#sub total_out
#{
#    my $self = shift ;
#    0;
#}
#

#sub total_in
#{
#    my $self = shift ;
#    $self->{Def}->total_in();
#}
#
#sub crc32
#{
#    my $self = shift ;
#    $self->{Def}->crc32();
#}
#
#sub adler32
#{
#    my $self = shift ;
#    $self->{Def}->adler32();
#}


1;

__END__

PK     �siZs8����  ��    Compress/Zip.pmnu �[���        package IO::Compress::Zip ;

use strict ;
use warnings;
use bytes;

use IO::Compress::Base::Common  2.061 qw(:Status );
use IO::Compress::RawDeflate 2.061 ();
use IO::Compress::Adapter::Deflate 2.061 ;
use IO::Compress::Adapter::Identity 2.061 ;
use IO::Compress::Zlib::Extra 2.061 ;
use IO::Compress::Zip::Constants 2.061 ;

use File::Spec();
use Config;

use Compress::Raw::Zlib  2.061 (); 

BEGIN
{
    eval { require IO::Compress::Adapter::Bzip2 ; 
           import  IO::Compress::Adapter::Bzip2 2.061 ; 
           require IO::Compress::Bzip2 ; 
           import  IO::Compress::Bzip2 2.061 ; 
         } ;
         
    eval { require IO::Compress::Adapter::Lzma ; 
           import  IO::Compress::Adapter::Lzma 2.061 ; 
           require IO::Compress::Lzma ; 
           import  IO::Compress::Lzma 2.061 ; 
         } ;
}


require Exporter ;

our ($VERSION, @ISA, @EXPORT_OK, %EXPORT_TAGS, %DEFLATE_CONSTANTS, $ZipError);

$VERSION = '2.061';
$ZipError = '';

@ISA = qw(Exporter IO::Compress::RawDeflate);
@EXPORT_OK = qw( $ZipError zip ) ;
%EXPORT_TAGS = %IO::Compress::RawDeflate::DEFLATE_CONSTANTS ;

push @{ $EXPORT_TAGS{all} }, @EXPORT_OK ;

$EXPORT_TAGS{zip_method} = [qw( ZIP_CM_STORE ZIP_CM_DEFLATE ZIP_CM_BZIP2 ZIP_CM_LZMA)];
push @{ $EXPORT_TAGS{all} }, @{ $EXPORT_TAGS{zip_method} };

Exporter::export_ok_tags('all');

sub new
{
    my $class = shift ;

    my $obj = IO::Compress::Base::Common::createSelfTiedObject($class, \$ZipError);    
    $obj->_create(undef, @_);

}

sub zip
{
    my $obj = IO::Compress::Base::Common::createSelfTiedObject(undef, \$ZipError);    
    return $obj->_def(@_);
}

sub isMethodAvailable
{
    my $method = shift;
    
    # Store & Deflate are always available
    return 1
        if $method == ZIP_CM_STORE || $method == ZIP_CM_DEFLATE ;
        
    return 1 
        if $method == ZIP_CM_BZIP2 and 
           defined $IO::Compress::Adapter::Bzip2::VERSION;
           
    return 1
        if $method == ZIP_CM_LZMA and
           defined $IO::Compress::Adapter::Lzma::VERSION;
           
    return 0;       
}

sub beforePayload
{
    my $self = shift ;

    if (*$self->{ZipData}{Sparse} ) {
        my $inc = 1024 * 100 ;
        my $NULLS = ("\x00" x $inc) ;
        my $sparse = *$self->{ZipData}{Sparse} ;
        *$self->{CompSize}->add( $sparse );
        *$self->{UnCompSize}->add( $sparse );
        
        *$self->{FH}->seek($sparse, IO::Handle::SEEK_CUR);
        
        *$self->{ZipData}{CRC32} = Compress::Raw::Zlib::crc32($NULLS, *$self->{ZipData}{CRC32})
            for 1 .. int $sparse / $inc;
        *$self->{ZipData}{CRC32} = Compress::Raw::Zlib::crc32(substr($NULLS, 0,  $sparse % $inc), 
                                         *$self->{ZipData}{CRC32})
            if $sparse % $inc;
    }
}

sub mkComp
{
    my $self = shift ;
    my $got = shift ;

    my ($obj, $errstr, $errno) ;

    if (*$self->{ZipData}{Method} == ZIP_CM_STORE) {
        ($obj, $errstr, $errno) = IO::Compress::Adapter::Identity::mkCompObject(
                                                 $got->getValue('level'),
                                                 $got->getValue('strategy')
                                                 );
        *$self->{ZipData}{CRC32} = Compress::Raw::Zlib::crc32(undef);
    }
    elsif (*$self->{ZipData}{Method} == ZIP_CM_DEFLATE) {
        ($obj, $errstr, $errno) = IO::Compress::Adapter::Deflate::mkCompObject(
                                                 $got->getValue('crc32'),
                                                 $got->getValue('adler32'),
                                                 $got->getValue('level'),
                                                 $got->getValue('strategy')
                                                 );
    }
    elsif (*$self->{ZipData}{Method} == ZIP_CM_BZIP2) {
        ($obj, $errstr, $errno) = IO::Compress::Adapter::Bzip2::mkCompObject(
                                                $got->getValue('blocksize100k'),
                                                $got->getValue('workfactor'),
                                                $got->getValue('verbosity')
                                               );
        *$self->{ZipData}{CRC32} = Compress::Raw::Zlib::crc32(undef);
    }
    elsif (*$self->{ZipData}{Method} == ZIP_CM_LZMA) {
        ($obj, $errstr, $errno) = IO::Compress::Adapter::Lzma::mkRawZipCompObject($got->getValue('preset'),
                                                                                 $got->getValue('extreme'),
                                                                                 );
        *$self->{ZipData}{CRC32} = Compress::Raw::Zlib::crc32(undef);
    }

    return $self->saveErrorString(undef, $errstr, $errno)
       if ! defined $obj;

    if (! defined *$self->{ZipData}{SizesOffset}) {
        *$self->{ZipData}{SizesOffset} = 0;
        *$self->{ZipData}{Offset} = new U64 ;
    }

    *$self->{ZipData}{AnyZip64} = 0
        if ! defined  *$self->{ZipData}{AnyZip64} ;

    return $obj;    
}

sub reset
{
    my $self = shift ;

    *$self->{Compress}->reset();
    *$self->{ZipData}{CRC32} = Compress::Raw::Zlib::crc32('');

    return STATUS_OK;    
}

sub filterUncompressed
{
    my $self = shift ;

    if (*$self->{ZipData}{Method} == ZIP_CM_DEFLATE) {
        *$self->{ZipData}{CRC32} = *$self->{Compress}->crc32();
    }
    else {
        *$self->{ZipData}{CRC32} = Compress::Raw::Zlib::crc32(${$_[0]}, *$self->{ZipData}{CRC32});

    }
}

sub canonicalName
{
    # This sub is derived from Archive::Zip::_asZipDirName

    # Return the normalized name as used in a zip file (path
    # separators become slashes, etc.).
    # Will translate internal slashes in path components (i.e. on Macs) to
    # underscores.  Discards volume names.
    # When $forceDir is set, returns paths with trailing slashes 
    #
    # input         output
    # .             '.'
    # ./a           a
    # ./a/b         a/b
    # ./a/b/        a/b
    # a/b/          a/b
    # /a/b/         a/b
    # c:\a\b\c.doc  a/b/c.doc      # on Windows
    # "i/o maps:whatever"   i_o maps/whatever   # on Macs

    my $name      = shift;
    my $forceDir  = shift ;

    my ( $volume, $directories, $file ) =
      File::Spec->splitpath( File::Spec->canonpath($name), $forceDir );
      
    my @dirs = map { $_ =~ s{/}{_}g; $_ } 
               File::Spec->splitdir($directories);

    if ( @dirs > 0 ) { pop (@dirs) if $dirs[-1] eq '' }   # remove empty component
    push @dirs, defined($file) ? $file : '' ;

    my $normalised_path = join '/', @dirs;

    # Leading directory separators should not be stored in zip archives.
    # Example:
    #   C:\a\b\c\      a/b/c
    #   C:\a\b\c.txt   a/b/c.txt
    #   /a/b/c/        a/b/c
    #   /a/b/c.txt     a/b/c.txt
    $normalised_path =~ s{^/}{};  # remove leading separator

    return $normalised_path;
}


sub mkHeader
{
    my $self  = shift;
    my $param = shift ;
    
    *$self->{ZipData}{LocalHdrOffset} = U64::clone(*$self->{ZipData}{Offset});
        
    my $comment = '';
    $comment = $param->valueOrDefault('comment') ;

    my $filename = '';
    $filename = $param->valueOrDefault('name') ;

    $filename = canonicalName($filename)
        if length $filename && $param->getValue('canonicalname') ;

    if (defined *$self->{ZipData}{FilterName} ) {
        local *_ = \$filename ;
        &{ *$self->{ZipData}{FilterName} }() ;
    }

#    if ( $param->getValue('utf8') ) {
#        require Encode ;
#        $filename = Encode::encode_utf8($filename)
#            if length $filename ;
#        $comment = Encode::encode_utf8($comment)
#            if length $comment ;
#    }

    my $hdr = '';

    my $time = _unixToDosTime($param->getValue('time'));

    my $extra = '';
    my $ctlExtra = '';
    my $empty = 0;
    my $osCode = $param->getValue('os_code') ;
    my $extFileAttr = 0 ;
    
    # This code assumes Unix.
    # TODO - revisit this
    $extFileAttr = 0100644 << 16 
        if $osCode == ZIP_OS_CODE_UNIX ;

    if (*$self->{ZipData}{Zip64}) {
        $empty = IO::Compress::Base::Common::MAX32;

        my $x = '';
        $x .= pack "V V", 0, 0 ; # uncompressedLength   
        $x .= pack "V V", 0, 0 ; # compressedLength   
        $extra .= IO::Compress::Zlib::Extra::mkSubField(ZIP_EXTRA_ID_ZIP64, $x);
    }

    if (! $param->getValue('minimal')) {
        if ($param->parsed('mtime'))
        {
            $extra .= mkExtendedTime($param->getValue('mtime'), 
                                    $param->getValue('atime'), 
                                    $param->getValue('ctime'));

            $ctlExtra .= mkExtendedTime($param->getValue('mtime'));
        }

        if ( $osCode == ZIP_OS_CODE_UNIX )
        {
            if ( $param->getValue('want_exunixn') )
            {
                    my $ux3 = mkUnixNExtra( @{ $param->getValue('want_exunixn') }); 
                    $extra    .= $ux3;
                    $ctlExtra .= $ux3;
            }

            if ( $param->getValue('exunix2') )
            {
                    $extra    .= mkUnix2Extra( @{ $param->getValue('exunix2') }); 
                    $ctlExtra .= mkUnix2Extra();
            }
        }

        $extFileAttr = $param->getValue('extattr') 
            if defined $param->getValue('extattr') ;

        $extra .= $param->getValue('extrafieldlocal') 
            if defined $param->getValue('extrafieldlocal');

        $ctlExtra .= $param->getValue('extrafieldcentral') 
            if defined $param->getValue('extrafieldcentral');
    }

    my $method = *$self->{ZipData}{Method} ;
    my $gpFlag = 0 ;    
    $gpFlag |= ZIP_GP_FLAG_STREAMING_MASK
        if *$self->{ZipData}{Stream} ;

    $gpFlag |= ZIP_GP_FLAG_LZMA_EOS_PRESENT
        if $method == ZIP_CM_LZMA ;

#    $gpFlag |= ZIP_GP_FLAG_LANGUAGE_ENCODING
#        if  $param->getValue('utf8') && (length($filename) || length($comment));

    my $version = $ZIP_CM_MIN_VERSIONS{$method};
    $version = ZIP64_MIN_VERSION
        if ZIP64_MIN_VERSION > $version && *$self->{ZipData}{Zip64};

    my $madeBy = ($param->getValue('os_code') << 8) + $version;
    my $extract = $version;

    *$self->{ZipData}{Version} = $version;
    *$self->{ZipData}{MadeBy} = $madeBy;

    my $ifa = 0;
    $ifa |= ZIP_IFA_TEXT_MASK
        if $param->getValue('textflag');

    $hdr .= pack "V", ZIP_LOCAL_HDR_SIG ; # signature
    $hdr .= pack 'v', $extract   ; # extract Version & OS
    $hdr .= pack 'v', $gpFlag    ; # general purpose flag (set streaming mode)
    $hdr .= pack 'v', $method    ; # compression method (deflate)
    $hdr .= pack 'V', $time      ; # last mod date/time
    $hdr .= pack 'V', 0          ; # crc32               - 0 when streaming
    $hdr .= pack 'V', $empty     ; # compressed length   - 0 when streaming
    $hdr .= pack 'V', $empty     ; # uncompressed length - 0 when streaming
    $hdr .= pack 'v', length $filename ; # filename length
    $hdr .= pack 'v', length $extra ; # extra length
    
    $hdr .= $filename ;

    # Remember the offset for the compressed & uncompressed lengths in the
    # local header.
    if (*$self->{ZipData}{Zip64}) {
        *$self->{ZipData}{SizesOffset} = *$self->{ZipData}{Offset}->get64bit()
            + length($hdr) + 4 ;
    }
    else {
        *$self->{ZipData}{SizesOffset} = *$self->{ZipData}{Offset}->get64bit()
                                            + 18;
    }

    $hdr .= $extra ;


    my $ctl = '';

    $ctl .= pack "V", ZIP_CENTRAL_HDR_SIG ; # signature
    $ctl .= pack 'v', $madeBy    ; # version made by
    $ctl .= pack 'v', $extract   ; # extract Version
    $ctl .= pack 'v', $gpFlag    ; # general purpose flag (streaming mode)
    $ctl .= pack 'v', $method    ; # compression method (deflate)
    $ctl .= pack 'V', $time      ; # last mod date/time
    $ctl .= pack 'V', 0          ; # crc32
    $ctl .= pack 'V', $empty     ; # compressed length
    $ctl .= pack 'V', $empty     ; # uncompressed length
    $ctl .= pack 'v', length $filename ; # filename length

    *$self->{ZipData}{ExtraOffset} = length $ctl;
    *$self->{ZipData}{ExtraSize} = length $ctlExtra ;

    $ctl .= pack 'v', length $ctlExtra ; # extra length
    $ctl .= pack 'v', length $comment ;  # file comment length
    $ctl .= pack 'v', 0          ; # disk number start 
    $ctl .= pack 'v', $ifa       ; # internal file attributes
    $ctl .= pack 'V', $extFileAttr   ; # external file attributes

    # offset to local hdr
    if (*$self->{ZipData}{LocalHdrOffset}->is64bit() ) { 
        $ctl .= pack 'V', IO::Compress::Base::Common::MAX32 ;
    }
    else {
        $ctl .= *$self->{ZipData}{LocalHdrOffset}->getPacked_V32() ; 
    }
    
    $ctl .= $filename ;
    $ctl .= $ctlExtra ;
    $ctl .= $comment ;

    *$self->{ZipData}{Offset}->add32(length $hdr) ;

    *$self->{ZipData}{CentralHeader} = $ctl;


    return $hdr;
}

sub mkTrailer
{
    my $self = shift ;

    my $crc32 ;
    if (*$self->{ZipData}{Method} == ZIP_CM_DEFLATE) {
        $crc32 = pack "V", *$self->{Compress}->crc32();
    }
    else {
        $crc32 = pack "V", *$self->{ZipData}{CRC32};
    }

    my $ctl = *$self->{ZipData}{CentralHeader} ;

    my $sizes ;
    if (! *$self->{ZipData}{Zip64}) {
        $sizes .= *$self->{CompSize}->getPacked_V32() ;   # Compressed size
        $sizes .= *$self->{UnCompSize}->getPacked_V32() ; # Uncompressed size
    }
    else {
        $sizes .= *$self->{CompSize}->getPacked_V64() ;   # Compressed size
        $sizes .= *$self->{UnCompSize}->getPacked_V64() ; # Uncompressed size
    }

    my $data = $crc32 . $sizes ;


    my $xtrasize  = *$self->{UnCompSize}->getPacked_V64() ; # Uncompressed size
       $xtrasize .= *$self->{CompSize}->getPacked_V64() ;   # Compressed size

    my $hdr = '';

    if (*$self->{ZipData}{Stream}) {
        $hdr  = pack "V", ZIP_DATA_HDR_SIG ;                       # signature
        $hdr .= $data ;
    }
    else {
        $self->writeAt(*$self->{ZipData}{LocalHdrOffset}->get64bit() + 14,  $crc32)
            or return undef;
        $self->writeAt(*$self->{ZipData}{SizesOffset}, 
                *$self->{ZipData}{Zip64} ? $xtrasize : $sizes)
            or return undef;
    }

    # Central Header Record/Zip64 extended field

    substr($ctl, 16, length $crc32) = $crc32 ;

    my $x = '';

    # uncompressed length
    if (*$self->{UnCompSize}->isAlmost64bit() || *$self->{ZipData}{Zip64} > 1) {
        $x .= *$self->{UnCompSize}->getPacked_V64() ; 
    } else {
        substr($ctl, 24, 4) = *$self->{UnCompSize}->getPacked_V32() ;
    }

    # compressed length
    if (*$self->{CompSize}->isAlmost64bit() || *$self->{ZipData}{Zip64} > 1) {
        $x .= *$self->{CompSize}->getPacked_V64() ; 
    } else {
        substr($ctl, 20, 4) = *$self->{CompSize}->getPacked_V32() ;
    }

    # Local Header offset
    $x .= *$self->{ZipData}{LocalHdrOffset}->getPacked_V64()
        if *$self->{ZipData}{LocalHdrOffset}->is64bit() ; 

    # disk no - always zero, so don't need it
    #$x .= pack "V", 0    ; 

    if (length $x) {
        my $xtra = IO::Compress::Zlib::Extra::mkSubField(ZIP_EXTRA_ID_ZIP64, $x);
        $ctl .= $xtra ;
        substr($ctl, *$self->{ZipData}{ExtraOffset}, 2) = 
             pack 'v', *$self->{ZipData}{ExtraSize} + length $xtra;

        *$self->{ZipData}{AnyZip64} = 1;
    }

    *$self->{ZipData}{Offset}->add32(length($hdr));
    *$self->{ZipData}{Offset}->add( *$self->{CompSize} );
    push @{ *$self->{ZipData}{CentralDir} }, $ctl ;

    return $hdr;
}

sub mkFinalTrailer
{
    my $self = shift ;
        
    my $comment = '';
    $comment = *$self->{ZipData}{ZipComment} ;

    my $cd_offset = *$self->{ZipData}{Offset}->get32bit() ; # offset to start central dir

    my $entries = @{ *$self->{ZipData}{CentralDir} };
    
    *$self->{ZipData}{AnyZip64} = 1 
        if *$self->{ZipData}{Offset}->is64bit || $entries >= 0xFFFF ;      
           
    my $cd = join '', @{ *$self->{ZipData}{CentralDir} };
    my $cd_len = length $cd ;

    my $z64e = '';

    if ( *$self->{ZipData}{AnyZip64} ) {

        my $v  = *$self->{ZipData}{Version} ;
        my $mb = *$self->{ZipData}{MadeBy} ;
        $z64e .= pack 'v', $mb            ; # Version made by
        $z64e .= pack 'v', $v             ; # Version to extract
        $z64e .= pack 'V', 0              ; # number of disk
        $z64e .= pack 'V', 0              ; # number of disk with central dir
        $z64e .= U64::pack_V64 $entries   ; # entries in central dir on this disk
        $z64e .= U64::pack_V64 $entries   ; # entries in central dir
        $z64e .= U64::pack_V64 $cd_len    ; # size of central dir
        $z64e .= *$self->{ZipData}{Offset}->getPacked_V64() ; # offset to start central dir

        $z64e  = pack("V", ZIP64_END_CENTRAL_REC_HDR_SIG) # signature
              .  U64::pack_V64(length $z64e)
              .  $z64e ;

        *$self->{ZipData}{Offset}->add32(length $cd) ; 

        $z64e .= pack "V", ZIP64_END_CENTRAL_LOC_HDR_SIG; # signature
        $z64e .= pack 'V', 0              ; # number of disk with central dir
        $z64e .= *$self->{ZipData}{Offset}->getPacked_V64() ; # offset to end zip64 central dir
        $z64e .= pack 'V', 1              ; # Total number of disks 

        $cd_offset = IO::Compress::Base::Common::MAX32 ;
        $cd_len = IO::Compress::Base::Common::MAX32 if IO::Compress::Base::Common::isGeMax32 $cd_len ;
        $entries = 0xFFFF if $entries >= 0xFFFF ;
    }

    my $ecd = '';
    $ecd .= pack "V", ZIP_END_CENTRAL_HDR_SIG ; # signature
    $ecd .= pack 'v', 0          ; # number of disk
    $ecd .= pack 'v', 0          ; # number of disk with central dir
    $ecd .= pack 'v', $entries   ; # entries in central dir on this disk
    $ecd .= pack 'v', $entries   ; # entries in central dir
    $ecd .= pack 'V', $cd_len    ; # size of central dir
    $ecd .= pack 'V', $cd_offset ; # offset to start central dir
    $ecd .= pack 'v', length $comment ; # zipfile comment length
    $ecd .= $comment;

    return $cd . $z64e . $ecd ;
}

sub ckParams
{
    my $self = shift ;
    my $got = shift;
    
    $got->setValue('crc32' => 1);

    if (! $got->parsed('time') ) {
        # Modification time defaults to now.
        $got->setValue('time' => time) ;
    }

    if ($got->parsed('extime') ) {
        my $timeRef = $got->getValue('extime');
        if ( defined $timeRef) {
            return $self->saveErrorString(undef, "exTime not a 3-element array ref")   
                if ref $timeRef ne 'ARRAY' || @$timeRef != 3;
        }

        $got->setValue("mtime", $timeRef->[1]);
        $got->setValue("atime", $timeRef->[0]);
        $got->setValue("ctime", $timeRef->[2]);
    }
    
    # Unix2/3 Extended Attribute
    for my $name (qw(exunix2 exunixn))
    {
        if ($got->parsed($name) ) {
            my $idRef = $got->getValue($name);
            if ( defined $idRef) {
                return $self->saveErrorString(undef, "$name not a 2-element array ref")   
                    if ref $idRef ne 'ARRAY' || @$idRef != 2;
            }

            $got->setValue("uid", $idRef->[0]);
            $got->setValue("gid", $idRef->[1]);
            $got->setValue("want_$name", $idRef);
        }
    }

    *$self->{ZipData}{AnyZip64} = 1
        if $got->getValue('zip64');
    *$self->{ZipData}{Zip64} = $got->getValue('zip64');
    *$self->{ZipData}{Stream} = $got->getValue('stream');

    my $method = $got->getValue('method');
    return $self->saveErrorString(undef, "Unknown Method '$method'")   
        if ! defined $ZIP_CM_MIN_VERSIONS{$method};

    return $self->saveErrorString(undef, "Bzip2 not available")
        if $method == ZIP_CM_BZIP2 and 
           ! defined $IO::Compress::Adapter::Bzip2::VERSION;

    return $self->saveErrorString(undef, "Lzma not available")
        if $method == ZIP_CM_LZMA 
        and ! defined $IO::Compress::Adapter::Lzma::VERSION;

    *$self->{ZipData}{Method} = $method;

    *$self->{ZipData}{ZipComment} = $got->getValue('zipcomment') ;

    for my $name (qw( extrafieldlocal extrafieldcentral ))
    {
        my $data = $got->getValue($name) ;
        if (defined $data) {
            my $bad = IO::Compress::Zlib::Extra::parseExtraField($data, 1, 0) ;
            return $self->saveErrorString(undef, "Error with $name Parameter: $bad")
                if $bad ;

            $got->setValue($name, $data) ;
        }
    }

    return undef
        if defined $IO::Compress::Bzip2::VERSION
            and ! IO::Compress::Bzip2::ckParams($self, $got);

    if ($got->parsed('sparse') ) {
        *$self->{ZipData}{Sparse} = $got->getValue('sparse') ;
        *$self->{ZipData}{Method} = ZIP_CM_STORE;
    }

    if ($got->parsed('filtername')) {
        my $v = $got->getValue('filtername') ;
        *$self->{ZipData}{FilterName} = $v
            if ref $v eq 'CODE' ;
    }

    return 1 ;
}

sub outputPayload
{
    my $self = shift ;
    return 1 if *$self->{ZipData}{Sparse} ;
    return $self->output(@_);
}


#sub newHeader
#{
#    my $self = shift ;
#
#    return $self->mkHeader(*$self->{Got});
#}


our %PARAMS = (            
            'stream'    => [IO::Compress::Base::Common::Parse_boolean,   1],
           #'store'     => [IO::Compress::Base::Common::Parse_boolean,   0],
            'method'    => [IO::Compress::Base::Common::Parse_unsigned,  ZIP_CM_DEFLATE],
            
#            # Zip header fields
            'minimal'   => [IO::Compress::Base::Common::Parse_boolean,   0],
            'zip64'     => [IO::Compress::Base::Common::Parse_boolean,   0],
            'comment'   => [IO::Compress::Base::Common::Parse_any,       ''],
            'zipcomment'=> [IO::Compress::Base::Common::Parse_any,       ''],
            'name'      => [IO::Compress::Base::Common::Parse_any,       ''],
            'filtername'=> [IO::Compress::Base::Common::Parse_code,      undef],
            'canonicalname'=> [IO::Compress::Base::Common::Parse_boolean,   0],
#            'utf8'      => [IO::Compress::Base::Common::Parse_boolean,   0],
            'time'      => [IO::Compress::Base::Common::Parse_any,       undef],
            'extime'    => [IO::Compress::Base::Common::Parse_any,       undef],
            'exunix2'   => [IO::Compress::Base::Common::Parse_any,       undef], 
            'exunixn'   => [IO::Compress::Base::Common::Parse_any,       undef], 
            'extattr'   => [IO::Compress::Base::Common::Parse_any, 
                    $Compress::Raw::Zlib::gzip_os_code == 3 
                        ? 0100644 << 16 
                        : 0],
            'os_code'   => [IO::Compress::Base::Common::Parse_unsigned,  $Compress::Raw::Zlib::gzip_os_code],
            
            'textflag'  => [IO::Compress::Base::Common::Parse_boolean,   0],
            'extrafieldlocal'  => [IO::Compress::Base::Common::Parse_any,    undef],
            'extrafieldcentral'=> [IO::Compress::Base::Common::Parse_any,    undef],

            # Lzma
            'preset'   => [IO::Compress::Base::Common::Parse_unsigned, 6],
            'extreme'  => [IO::Compress::Base::Common::Parse_boolean,  0],

            # For internal use only         
            'sparse'    => [IO::Compress::Base::Common::Parse_unsigned,  0],

            IO::Compress::RawDeflate::getZlibParams(),
            defined $IO::Compress::Bzip2::VERSION
                ? IO::Compress::Bzip2::getExtraParams()
                : ()
                
  
                );

sub getExtraParams
{
    return %PARAMS ;
}

sub getInverseClass
{
    return ('IO::Uncompress::Unzip',
                \$IO::Uncompress::Unzip::UnzipError);
}

sub getFileInfo
{
    my $self = shift ;
    my $params = shift;
    my $filename = shift ;

    if (IO::Compress::Base::Common::isaScalar($filename))
    {
        $params->setValue(zip64 => 1)
            if IO::Compress::Base::Common::isGeMax32 length (${ $filename }) ;

        return ;
    }

    my ($mode, $uid, $gid, $size, $atime, $mtime, $ctime) ;
    if ( $params->parsed('storelinks') )
    {
        ($mode, $uid, $gid, $size, $atime, $mtime, $ctime) 
                = (lstat($filename))[2, 4,5,7, 8,9,10] ;
    }
    else
    {
        ($mode, $uid, $gid, $size, $atime, $mtime, $ctime) 
                = (stat($filename))[2, 4,5,7, 8,9,10] ;
    }

    $params->setValue(textflag => -T $filename )
        if ! $params->parsed('textflag');

    $params->setValue(zip64 => 1)
        if IO::Compress::Base::Common::isGeMax32 $size ;

    $params->setValue('name' => $filename)
        if ! $params->parsed('name') ;

    $params->setValue('time' => $mtime) 
        if ! $params->parsed('time') ;
    
    if ( ! $params->parsed('extime'))
    {
        $params->setValue('mtime' => $mtime) ;
        $params->setValue('atime' => $atime) ;
        $params->setValue('ctime' => undef) ; # No Creation time
        # TODO - see if can fillout creation time on non-Unix
    }

    # NOTE - Unix specific code alert
    if (! $params->parsed('extattr'))
    {
        use Fcntl qw(:mode) ;
        my $attr = $mode << 16;
        $attr |= ZIP_A_RONLY if ($mode & S_IWRITE) == 0 ;
        $attr |= ZIP_A_DIR   if ($mode & S_IFMT  ) == S_IFDIR ;
        
        $params->setValue('extattr' => $attr);
    }

    $params->setValue('want_exunixn', [$uid, $gid]);
    $params->setValue('uid' => $uid) ;
    $params->setValue('gid' => $gid) ;
    
}

sub mkExtendedTime
{
    # order expected is m, a, c

    my $times = '';
    my $bit = 1 ;
    my $flags = 0;

    for my $time (@_)
    {
        if (defined $time)
        {
            $flags |= $bit;
            $times .= pack("V", $time);
        }

        $bit <<= 1 ;
    }

    return IO::Compress::Zlib::Extra::mkSubField(ZIP_EXTRA_ID_EXT_TIMESTAMP,
                                                 pack("C", $flags) .  $times);
}

sub mkUnix2Extra
{
    my $ids = '';
    for my $id (@_)
    {
        $ids .= pack("v", $id);
    }

    return IO::Compress::Zlib::Extra::mkSubField(ZIP_EXTRA_ID_INFO_ZIP_UNIX2, 
                                                 $ids);
}

sub mkUnixNExtra
{
    my $uid = shift;
    my $gid = shift;

    # Assumes UID/GID are 32-bit
    my $ids ;
    $ids .= pack "C", 1; # version
    $ids .= pack "C", $Config{uidsize};
    $ids .= pack "V", $uid;
    $ids .= pack "C", $Config{gidsize};
    $ids .= pack "V", $gid;

    return IO::Compress::Zlib::Extra::mkSubField(ZIP_EXTRA_ID_INFO_ZIP_UNIXN, 
                                                 $ids);
}


# from Archive::Zip
sub _unixToDosTime    # Archive::Zip::Member
{
	my $time_t = shift;
    
    # TODO - add something to cope with unix time < 1980 
	my ( $sec, $min, $hour, $mday, $mon, $year ) = localtime($time_t);
	my $dt = 0;
	$dt += ( $sec >> 1 );
	$dt += ( $min << 5 );
	$dt += ( $hour << 11 );
	$dt += ( $mday << 16 );
	$dt += ( ( $mon + 1 ) << 21 );
	$dt += ( ( $year - 80 ) << 25 );
	return $dt;
}

1;

__END__

=head1 NAME

IO::Compress::Zip - Write zip files/buffers
 
 
=head1 SYNOPSIS

    use IO::Compress::Zip qw(zip $ZipError) ;

    my $status = zip $input => $output [,OPTS] 
        or die "zip failed: $ZipError\n";

    my $z = new IO::Compress::Zip $output [,OPTS]
        or die "zip failed: $ZipError\n";

    $z->print($string);
    $z->printf($format, $string);
    $z->write($string);
    $z->syswrite($string [, $length, $offset]);
    $z->flush();
    $z->tell();
    $z->eof();
    $z->seek($position, $whence);
    $z->binmode();
    $z->fileno();
    $z->opened();
    $z->autoflush();
    $z->input_line_number();
    $z->newStream( [OPTS] );
    
    $z->deflateParams();
    
    $z->close() ;

    $ZipError ;

    # IO::File mode

    print $z $string;
    printf $z $format, $string;
    tell $z
    eof $z
    seek $z, $position, $whence
    binmode $z
    fileno $z
    close $z ;
    

=head1 DESCRIPTION

This module provides a Perl interface that allows writing zip 
compressed data to files or buffer.

The primary purpose of this module is to provide streaming write access to
zip files and buffers. It is not a general-purpose file archiver. If that
is what you want, check out C<Archive::Zip>.

At present three compression methods are supported by IO::Compress::Zip,
namely Store (no compression at all), Deflate, Bzip2 and LZMA.

Note that to create Bzip2 content, the module C<IO::Compress::Bzip2> must
be installed.

Note that to create LZMA content, the module C<IO::Compress::Lzma> must
be installed.

For reading zip files/buffers, see the companion module 
L<IO::Uncompress::Unzip|IO::Uncompress::Unzip>.

=head1 Functional Interface

A top-level function, C<zip>, is provided to carry out
"one-shot" compression between buffers and/or files. For finer
control over the compression process, see the L</"OO Interface">
section.

    use IO::Compress::Zip qw(zip $ZipError) ;

    zip $input_filename_or_reference => $output_filename_or_reference [,OPTS] 
        or die "zip failed: $ZipError\n";

The functional interface needs Perl5.005 or better.

=head2 zip $input_filename_or_reference => $output_filename_or_reference [, OPTS]

C<zip> expects at least two parameters,
C<$input_filename_or_reference> and C<$output_filename_or_reference>.

=head3 The C<$input_filename_or_reference> parameter

The parameter, C<$input_filename_or_reference>, is used to define the
source of the uncompressed data. 

It can take one of the following forms:

=over 5

=item A filename

If the <$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 compressed.

=item An Input FileGlob string

If C<$input_filename_or_reference> is a string that is delimited by the
characters "<" and ">" C<zip> 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.

In addition, if C<$input_filename_or_reference> is a simple filename, 
the default values for
the C<Name>, C<Time>, C<TextFlag>, C<ExtAttr>, C<exUnixN> and C<exTime> options will be sourced from that file.

If you do not want to use these defaults they can be overridden by
explicitly setting the C<Name>, C<Time>, C<TextFlag>, C<ExtAttr>, C<exUnixN> and C<exTime> options or by setting the
C<Minimal> parameter.

=head3 The C<$output_filename_or_reference> parameter

The parameter C<$output_filename_or_reference> is used to control the
destination of the compressed 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 
compressed data will be written to it.

=item A filehandle

If the C<$output_filename_or_reference> parameter is a filehandle, the
compressed 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
compressed 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 compressed 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<zip> 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<$input_filename_or_reference> maps to multiple files/buffers and
C<$output_filename_or_reference> is a single
file/buffer the input files/buffers will each be stored
in C<$output_filename_or_reference> as a distinct entry.

=head2 Optional Parameters

Unless specified below, the optional parameters for C<zip>,
C<OPTS>, are the same as those used with the OO interface defined in the
L</"Constructor Options"> section below.

=over 5

=item C<< AutoClose => 0|1 >>

This option applies to any input or output data streams to 
C<zip> 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<zip> has
completed.

This parameter defaults to 0.

=item C<< BinModeIn => 0|1 >>

When reading from a file or filehandle, set C<binmode> before reading.

Defaults to 0.

=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 compressed data will be append to the end of
the output buffer. Otherwise the output buffer will be cleared before any
compressed 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 compressed
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 compressed 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 compressed 
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 compressed data. If the output is a filename, it will be opened for
appending. If the output is a buffer, all compressed 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 compressed 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 compressed data is output.

Defaults to 0.

=back

=head2 Examples

To read the contents of the file C<file1.txt> and write the compressed
data to the file C<file1.txt.zip>.

    use strict ;
    use warnings ;
    use IO::Compress::Zip qw(zip $ZipError) ;

    my $input = "file1.txt";
    zip $input => "$input.zip"
        or die "zip failed: $ZipError\n";

To read from an existing Perl filehandle, C<$input>, and write the
compressed data to a buffer, C<$buffer>.

    use strict ;
    use warnings ;
    use IO::Compress::Zip qw(zip $ZipError) ;
    use IO::File ;

    my $input = new IO::File "<file1.txt"
        or die "Cannot open 'file1.txt': $!\n" ;
    my $buffer ;
    zip $input => \$buffer 
        or die "zip failed: $ZipError\n";

To create a zip file, C<output.zip>, that contains the compressed contents
of the files C<alpha.txt> and C<beta.txt>

    use strict ;
    use warnings ;
    use IO::Compress::Zip qw(zip $ZipError) ;

    zip [ 'alpha.txt', 'beta.txt' ] => 'output.zip'
        or die "zip failed: $ZipError\n";

Alternatively, rather than having to explicitly name each of the files that
you want to compress, you could use a fileglob to select all the C<txt>
files in the current directory, as follows

    use strict ;
    use warnings ;
    use IO::Compress::Zip qw(zip $ZipError) ;

    my @files = <*.txt>;
    zip \@files => 'output.zip'
        or die "zip failed: $ZipError\n";

or more succinctly

    zip [ <*.txt> ] => 'output.zip'
        or die "zip failed: $ZipError\n";

=head1 OO Interface

=head2 Constructor

The format of the constructor for C<IO::Compress::Zip> is shown below

    my $z = new IO::Compress::Zip $output [,OPTS]
        or die "IO::Compress::Zip failed: $ZipError\n";

It returns an C<IO::Compress::Zip> object on success and undef on failure. 
The variable C<$ZipError> will contain an error message on failure.

If you are running Perl 5.005 or better the object, C<$z>, returned from 
IO::Compress::Zip can be used exactly like an L<IO::File|IO::File> filehandle. 
This means that all normal output file operations can be carried out 
with C<$z>. 
For example, to write to a compressed file/buffer you can use either of 
these forms

    $z->print("hello world\n");
    print $z "hello world\n";

The mandatory parameter C<$output> is used to control the destination
of the compressed data. This parameter can take one of these forms.

=over 5

=item A filename

If the C<$output> parameter is a simple scalar, it is assumed to be a
filename. This file will be opened for writing and the compressed data
will be written to it.

=item A filehandle

If the C<$output> parameter is a filehandle, the compressed data will be
written to it.
The string '-' can be used as an alias for standard output.

=item A scalar reference 

If C<$output> is a scalar reference, the compressed data will be stored
in C<$$output>.

=back

If the C<$output> parameter is any other type, C<IO::Compress::Zip>::new will
return undef.

=head2 Constructor Options

C<OPTS> is any combination of the following options:

=over 5

=item C<< AutoClose => 0|1 >>

This option is only valid when the C<$output> parameter is a filehandle. If
specified, and the value is true, it will result in the C<$output> being
closed once either the C<close> method is called or the C<IO::Compress::Zip>
object is destroyed.

This parameter defaults to 0.

=item C<< Append => 0|1 >>

Opens C<$output> in append mode. 

The behaviour of this option is dependent on the type of C<$output>.

=over 5

=item * A Buffer

If C<$output> is a buffer and C<Append> is enabled, all compressed data
will be append to the end of C<$output>. Otherwise C<$output> will be
cleared before any data is written to it.

=item * A Filename

If C<$output> is a filename and 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 compressed data is written to it.

=item * A Filehandle

If C<$output> is a filehandle, the file pointer will be positioned to the
end of the file via a call to C<seek> before any compressed data is written
to it.  Otherwise the file pointer will not be moved.

=back

This parameter defaults to 0.

=item C<< Name => $string >>

Stores the contents of C<$string> in the zip filename header field. 

If C<Name> is not specified and the C<$input> parameter is a filename, the
value of C<$input> will be used for the zip filename header field.

If C<Name> is not specified and the C<$input> parameter is not a filename,
no zip filename field will be created.

Note that both the C<CanonicalName> and C<FilterName> options
can modify the value used for the zip filename header field.

=item C<< CanonicalName => 0|1 >>

This option controls whether the filename field in the zip header is
I<normalized> into Unix format before being written to the zip file.

It is recommended that you enable this option unless you really need
to create a non-standard Zip file.

This is what APPNOTE.TXT has to say on what should be stored in the zip
filename header field.

    The name of the file, with optional relative path.          
    The path stored should not contain a drive or
    device letter, or a leading slash.  All slashes
    should be forward slashes '/' as opposed to
    backwards slashes '\' for compatibility with Amiga
    and UNIX file systems etc.

This option defaults to B<false>.

=item C<< FilterName => sub { ... }  >>

This option allow the filename field in the zip header to be modified
before it is written to the zip file.

This option takes a parameter that must be a reference to a sub.  On entry
to the sub the C<$_> variable will contain the name to be filtered. If no
filename is available C<$_> will contain an empty string.

The value of C<$_> when the sub returns will be  stored in the filename
header field.

Note that if C<CanonicalName> is enabled, a
normalized filename will be passed to the sub.

If you use C<FilterName> to modify the filename, it is your responsibility
to keep the filename in Unix format.

Although this option can be used with the OO ointerface, it is of most use
with the one-shot interface. For example, the code below shows how
C<FilterName> can be used to remove the path component from a series of
filenames before they are stored in C<$zipfile>.

    sub compressTxtFiles
    {
        my $zipfile = shift ;
        my $dir     = shift ;

        zip [ <$dir/*.txt> ] => $zipfile,
            FilterName => sub { s[^$dir/][] } ;  
    }    

=item C<< Time => $number >>

Sets the last modified time field in the zip header to $number.

This field defaults to the time the C<IO::Compress::Zip> object was created
if this option is not specified and the C<$input> parameter is not a
filename.

=item C<< ExtAttr => $attr >>

This option controls the "external file attributes" field in the central
header of the zip file. This is a 4 byte field.

If you are running a Unix derivative this value defaults to 

    0100644 << 16

This should allow read/write access to any files that are extracted from
the zip file/buffer`.

For all other systems it defaults to 0.

=item C<< exTime => [$atime, $mtime, $ctime] >>

This option expects an array reference with exactly three elements:
C<$atime>, C<mtime> and C<$ctime>. These correspond to the last access
time, last modification time and creation time respectively.

It uses these values to set the extended timestamp field (ID is "UT") in
the local zip header using the three values, $atime, $mtime, $ctime. In
addition it sets the extended timestamp field in the central zip header
using C<$mtime>.

If any of the three values is C<undef> that time value will not be used.
So, for example, to set only the C<$mtime> you would use this

    exTime => [undef, $mtime, undef]

If the C<Minimal> option is set to true, this option will be ignored.

By default no extended time field is created.

=item C<< exUnix2 => [$uid, $gid] >>

This option expects an array reference with exactly two elements: C<$uid>
and C<$gid>. These values correspond to the numeric User ID (UID) and Group ID
(GID) of the owner of the files respectively.

When the C<exUnix2> option is present it will trigger the creation of a
Unix2 extra field (ID is "Ux") in the local zip header. This will be populated
with C<$uid> and C<$gid>. An empty Unix2 extra field will also
be created in the central zip header. 

Note - The UID & GID are stored as 16-bit
integers in the "Ux" field. Use C<< exUnixN >> if your UID or GID are
32-bit.

If the C<Minimal> option is set to true, this option will be ignored.

By default no Unix2 extra field is created.

=item C<< exUnixN => [$uid, $gid] >>

This option expects an array reference with exactly two elements: C<$uid>
and C<$gid>. These values correspond to the numeric User ID (UID) and Group ID
(GID) of the owner of the files respectively.

When the C<exUnixN> option is present it will trigger the creation of a
UnixN extra field (ID is "ux") in bothe the local and central zip headers. 
This will be populated with C<$uid> and C<$gid>. 
The UID & GID are stored as 32-bit integers.

If the C<Minimal> option is set to true, this option will be ignored.

By default no UnixN extra field is created.

=item C<< Comment => $comment >>

Stores the contents of C<$comment> in the Central File Header of
the zip file.

By default, no comment field is written to the zip file.

=item C<< ZipComment => $comment >>

Stores the contents of C<$comment> in the End of Central Directory record
of the zip file.

By default, no comment field is written to the zip file.

=item C<< Method => $method >>

Controls which compression method is used. At present four compression
methods are supported, namely Store (no compression at all), Deflate, 
Bzip2 and Lzma.

The symbols, ZIP_CM_STORE, ZIP_CM_DEFLATE, ZIP_CM_BZIP2 and ZIP_CM_LZMA 
are used to select the compression method.

These constants are not imported by C<IO::Compress::Zip> by default.

    use IO::Compress::Zip qw(:zip_method);
    use IO::Compress::Zip qw(:constants);
    use IO::Compress::Zip qw(:all);

Note that to create Bzip2 content, the module C<IO::Compress::Bzip2> must
be installed. A fatal error will be thrown if you attempt to create Bzip2
content when C<IO::Compress::Bzip2> is not available.

Note that to create Lzma content, the module C<IO::Compress::Lzma> must
be installed. A fatal error will be thrown if you attempt to create Lzma
content when C<IO::Compress::Lzma> is not available.

The default method is ZIP_CM_DEFLATE.

=item C<< Stream => 0|1 >>

This option controls whether the zip file/buffer output is created in
streaming mode.

Note that when outputting to a file with streaming mode disabled (C<Stream>
is 0), the output file must be seekable.

The default is 1.

=item C<< Zip64 => 0|1 >>

Create a Zip64 zip file/buffer. This option is used if you want
to store files larger than 4 Gig or store more than 64K files in a single
zip archive.. 

C<Zip64> will be automatically set, as needed, if working with the one-shot 
interface when the input is either a filename or a scalar reference.

If you intend to manipulate the Zip64 zip files created with this module
using an external zip/unzip, make sure that it supports Zip64.  

In particular, if you are using Info-Zip you need to have zip version 3.x
or better to update a Zip64 archive and unzip version 6.x to read a zip64
archive. 

The default is 0.

=item C<< TextFlag => 0|1 >>

This parameter controls the setting of a bit in the zip central header. It
is used to signal that the data stored in the zip file/buffer is probably
text.

In one-shot mode this flag will be set to true if the Perl C<-T> operator thinks
the file contains text.

The default is 0. 

=item C<< ExtraFieldLocal => $data >>

=item C<< ExtraFieldCentral => $data >>

The C<ExtraFieldLocal> option is used to store additional metadata in the
local header for the zip file/buffer. The C<ExtraFieldCentral> does the
same for the matching central header.

An extra field consists of zero or more subfields. Each subfield consists
of a two byte header followed by the subfield data.

The list of subfields can be supplied in any of the following formats

    ExtraFieldLocal => [$id1, $data1,
                        $id2, $data2,
                         ...
                       ]

    ExtraFieldLocal => [ [$id1 => $data1],
                         [$id2 => $data2],
                         ...
                       ]

    ExtraFieldLocal => { $id1 => $data1,
                         $id2 => $data2,
                         ...
                       }

Where C<$id1>, C<$id2> are two byte subfield ID's. 

If you use the hash syntax, you have no control over the order in which
the ExtraSubFields are stored, plus you cannot have SubFields with
duplicate ID.

Alternatively the list of subfields can by supplied as a scalar, thus

    ExtraField => $rawdata

In this case C<IO::Compress::Zip> will check that C<$rawdata> consists of 
zero or more conformant sub-fields. 

The Extended Time field (ID "UT"), set using the C<exTime> option, and the
Unix2 extra field (ID "Ux), set using the C<exUnix2> option, are examples
of extra fields.

If the C<Minimal> option is set to true, this option will be ignored.

The maximum size of an extra field 65535 bytes.

=item C<< Minimal => 1|0 >>

If specified, this option will disable the creation of all extra fields
in the zip local and central headers. So the C<exTime>, C<exUnix2>,
C<exUnixN>, C<ExtraFieldLocal> and C<ExtraFieldCentral> options will 
be ignored.

This parameter defaults to 0.

=item C<< BlockSize100K => number >>

Specify the number of 100K blocks bzip2 uses during compression. 

Valid values are from 1 to 9, where 9 is best compression.

This option is only valid if the C<Method> is ZIP_CM_BZIP2. It is ignored
otherwise.

The default is 1.

=item C<< WorkFactor => number >>

Specifies how much effort bzip2 should take before resorting to a slower
fallback compression algorithm.

Valid values range from 0 to 250, where 0 means use the default value 30.

This option is only valid if the C<Method> is ZIP_CM_BZIP2. It is ignored
otherwise.

The default is 0.

=item C<< Preset => number >>

Used to choose the LZMA compression preset.

Valid values are 0-9 and C<LZMA_PRESET_DEFAULT>.

0 is the fastest compression with the lowest memory usage and the lowest
compression.

9 is the slowest compession with the highest memory usage but with the best
compression.

This option is only valid if the C<Method> is ZIP_CM_LZMA. It is ignored
otherwise.

Defaults to C<LZMA_PRESET_DEFAULT> (6).

=item C<< Extreme => 0|1 >>

Makes LZMA compression a lot slower, but a small compression gain.

This option is only valid if the C<Method> is ZIP_CM_LZMA. It is ignored
otherwise.

Defaults to 0.

=item -Level 

Defines the compression level used by zlib. The value should either be
a number between 0 and 9 (0 means no compression and 9 is maximum
compression), or one of the symbolic constants defined below.

   Z_NO_COMPRESSION
   Z_BEST_SPEED
   Z_BEST_COMPRESSION
   Z_DEFAULT_COMPRESSION

The default is Z_DEFAULT_COMPRESSION.

Note, these constants are not imported by C<IO::Compress::Zip> by default.

    use IO::Compress::Zip qw(:strategy);
    use IO::Compress::Zip qw(:constants);
    use IO::Compress::Zip qw(:all);

=item -Strategy 

Defines the strategy used to tune the compression. Use one of the symbolic
constants defined below.

   Z_FILTERED
   Z_HUFFMAN_ONLY
   Z_RLE
   Z_FIXED
   Z_DEFAULT_STRATEGY

The default is Z_DEFAULT_STRATEGY.

=item C<< Strict => 0|1 >>

This is a placeholder option.

=back

=head2 Examples

TODO

=head1 Methods 

=head2 print

Usage is

    $z->print($data)
    print $z $data

Compresses and outputs the contents of the C<$data> parameter. This
has the same behaviour as the C<print> built-in.

Returns true if successful.

=head2 printf

Usage is

    $z->printf($format, $data)
    printf $z $format, $data

Compresses and outputs the contents of the C<$data> parameter.

Returns true if successful.

=head2 syswrite

Usage is

    $z->syswrite $data
    $z->syswrite $data, $length
    $z->syswrite $data, $length, $offset

Compresses and outputs the contents of the C<$data> parameter.

Returns the number of uncompressed bytes written, or C<undef> if
unsuccessful.

=head2 write

Usage is

    $z->write $data
    $z->write $data, $length
    $z->write $data, $length, $offset

Compresses and outputs the contents of the C<$data> parameter.

Returns the number of uncompressed bytes written, or C<undef> if
unsuccessful.

=head2 flush

Usage is

    $z->flush;
    $z->flush($flush_type);

Flushes any pending compressed data to the output file/buffer.

This method takes an optional parameter, C<$flush_type>, that controls
how the flushing will be carried out. By default the C<$flush_type>
used is C<Z_FINISH>. Other valid values for C<$flush_type> are
C<Z_NO_FLUSH>, C<Z_SYNC_FLUSH>, C<Z_FULL_FLUSH> and C<Z_BLOCK>. It is
strongly recommended that you only set the C<flush_type> parameter if
you fully understand the implications of what it does - overuse of C<flush>
can seriously degrade the level of compression achieved. See the C<zlib>
documentation for details.

Returns true on success.

=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 C<close> method has been called.

=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 output file/buffer.
It is a fatal error to attempt to seek backward.

Empty parts of the file/buffer will have NULL (0x00) bytes written to them.

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)

This method always returns C<undef> when compressing. 

=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 ;

Flushes any pending compressed data and then closes the output file/buffer. 

For most versions of Perl this method will be automatically invoked if
the IO::Compress::Zip 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::Compress::Zip
object was created, and the object is associated with a file, the
underlying file will also be closed.

=head2 newStream([OPTS])

Usage is

    $z->newStream( [OPTS] )

Closes the current compressed data stream and starts a new one.

OPTS consists of any of the the options that are available when creating
the C<$z> object.

See the L</"Constructor Options"> section for more details.

=head2 deflateParams

Usage is

    $z->deflateParams

TODO

=head1 Importing 

A number of symbolic constants are required by some methods in 
C<IO::Compress::Zip>. None are imported by default.

=over 5

=item :all

Imports C<zip>, C<$ZipError> and all symbolic
constants that can be used by C<IO::Compress::Zip>. Same as doing this

    use IO::Compress::Zip qw(zip $ZipError :constants) ;

=item :constants

Import all symbolic constants. Same as doing this

    use IO::Compress::Zip qw(:flush :level :strategy :zip_method) ;

=item :flush

These symbolic constants are used by the C<flush> method.

    Z_NO_FLUSH
    Z_PARTIAL_FLUSH
    Z_SYNC_FLUSH
    Z_FULL_FLUSH
    Z_FINISH
    Z_BLOCK

=item :level

These symbolic constants are used by the C<Level> option in the constructor.

    Z_NO_COMPRESSION
    Z_BEST_SPEED
    Z_BEST_COMPRESSION
    Z_DEFAULT_COMPRESSION

=item :strategy

These symbolic constants are used by the C<Strategy> option in the constructor.

    Z_FILTERED
    Z_HUFFMAN_ONLY
    Z_RLE
    Z_FIXED
    Z_DEFAULT_STRATEGY

=item :zip_method

These symbolic constants are used by the C<Method> option in the
constructor.

    ZIP_CM_STORE
    ZIP_CM_DEFLATE
    ZIP_CM_BZIP2

    
=back

=head1 EXAMPLES

=head2 Apache::GZip Revisited

See L<IO::Compress::FAQ|IO::Compress::FAQ/"Apache::GZip Revisited">

=head2 Working with Net::FTP

See L<IO::Compress::FAQ|IO::Compress::FAQ/"Compressed files and Net::FTP">

=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::Lzop>, L<IO::Uncompress::UnLzop>, L<IO::Compress::Lzf>, L<IO::Uncompress::UnLzf>, 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 
F<http://www.faqs.org/rfcs/rfc1950.html>,
F<http://www.faqs.org/rfcs/rfc1951.html> and
F<http://www.faqs.org/rfcs/rfc1952.html>

The I<zlib> compression library was written by Jean-loup Gailly
F<gzip@prep.ai.mit.edu> and Mark Adler F<madler@alumni.caltech.edu>.

The primary site for the I<zlib> compression library is
F<http://www.zlib.org>.

The primary site for gzip is F<http://www.gzip.org>.

=head1 AUTHOR

This module was written by Paul Marquess, F<pmqs@cpan.org>. 

=head1 MODIFICATION HISTORY

See the Changes file.

=head1 COPYRIGHT AND LICENSE

Copyright (c) 2005-2013 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     �siZb��O  O    Compress/Zlib/Extra.pmnu �[���        package IO::Compress::Zlib::Extra;

require 5.006 ;

use strict ;
use warnings;
use bytes;

our ($VERSION, @ISA, @EXPORT_OK, %EXPORT_TAGS);

$VERSION = '2.061';

use IO::Compress::Gzip::Constants 2.061 ;

sub ExtraFieldError
{
    return $_[0];
    return "Error with ExtraField Parameter: $_[0]" ;
}

sub validateExtraFieldPair
{
    my $pair = shift ;
    my $strict = shift;
    my $gzipMode = shift ;

    return ExtraFieldError("Not an array ref")
        unless ref $pair &&  ref $pair eq 'ARRAY';

    return ExtraFieldError("SubField must have two parts")
        unless @$pair == 2 ;

    return ExtraFieldError("SubField ID is a reference")
        if ref $pair->[0] ;

    return ExtraFieldError("SubField Data is a reference")
        if ref $pair->[1] ;

    # ID is exactly two chars   
    return ExtraFieldError("SubField ID not two chars long")
        unless length $pair->[0] == GZIP_FEXTRA_SUBFIELD_ID_SIZE ;

    # Check that the 2nd byte of the ID isn't 0    
    return ExtraFieldError("SubField ID 2nd byte is 0x00")
        if $strict && $gzipMode && substr($pair->[0], 1, 1) eq "\x00" ;

    return ExtraFieldError("SubField Data too long")
        if length $pair->[1] > GZIP_FEXTRA_SUBFIELD_MAX_SIZE ;


    return undef ;
}

sub parseRawExtra
{
    my $data     = shift ;
    my $extraRef = shift;
    my $strict   = shift;
    my $gzipMode = shift ;

    #my $lax = shift ;

    #return undef
    #    if $lax ;

    my $XLEN = length $data ;

    return ExtraFieldError("Too Large")
        if $XLEN > GZIP_FEXTRA_MAX_SIZE;

    my $offset = 0 ;
    while ($offset < $XLEN) {

        return ExtraFieldError("Truncated in FEXTRA Body Section")
            if $offset + GZIP_FEXTRA_SUBFIELD_HEADER_SIZE  > $XLEN ;

        my $id = substr($data, $offset, GZIP_FEXTRA_SUBFIELD_ID_SIZE);    
        $offset += GZIP_FEXTRA_SUBFIELD_ID_SIZE;

        my $subLen =  unpack("v", substr($data, $offset,
                                            GZIP_FEXTRA_SUBFIELD_LEN_SIZE));
        $offset += GZIP_FEXTRA_SUBFIELD_LEN_SIZE ;

        return ExtraFieldError("Truncated in FEXTRA Body Section")
            if $offset + $subLen > $XLEN ;

        my $bad = validateExtraFieldPair( [$id, 
                                           substr($data, $offset, $subLen)], 
                                           $strict, $gzipMode );
        return $bad if $bad ;
        push @$extraRef, [$id => substr($data, $offset, $subLen)]
            if defined $extraRef;;

        $offset += $subLen ;
    }

        
    return undef ;
}

sub findID
{
    my $id_want = shift ;
    my $data    = shift;

    my $XLEN = length $data ;

    my $offset = 0 ;
    while ($offset < $XLEN) {

        return undef
            if $offset + GZIP_FEXTRA_SUBFIELD_HEADER_SIZE  > $XLEN ;

        my $id = substr($data, $offset, GZIP_FEXTRA_SUBFIELD_ID_SIZE);    
        $offset += GZIP_FEXTRA_SUBFIELD_ID_SIZE;

        my $subLen =  unpack("v", substr($data, $offset,
                                            GZIP_FEXTRA_SUBFIELD_LEN_SIZE));
        $offset += GZIP_FEXTRA_SUBFIELD_LEN_SIZE ;

        return undef
            if $offset + $subLen > $XLEN ;

        return substr($data, $offset, $subLen)
            if $id eq $id_want ;

        $offset += $subLen ;
    }
        
    return undef ;
}


sub mkSubField
{
    my $id = shift ;
    my $data = shift ;

    return $id . pack("v", length $data) . $data ;
}

sub parseExtraField
{
    my $dataRef  = $_[0];
    my $strict   = $_[1];
    my $gzipMode = $_[2];
    #my $lax     = @_ == 2 ? $_[1] : 1;


    # ExtraField can be any of
    #
    #    -ExtraField => $data
    #
    #    -ExtraField => [$id1, $data1,
    #                    $id2, $data2]
    #                     ...
    #                   ]
    #
    #    -ExtraField => [ [$id1 => $data1],
    #                     [$id2 => $data2],
    #                     ...
    #                   ]
    #
    #    -ExtraField => { $id1 => $data1,
    #                     $id2 => $data2,
    #                     ...
    #                   }
    
    if ( ! ref $dataRef ) {

        return undef
            if ! $strict;

        return parseRawExtra($dataRef, undef, 1, $gzipMode);
    }

    my $data = $dataRef;
    my $out = '' ;

    if (ref $data eq 'ARRAY') {    
        if (ref $data->[0]) {

            foreach my $pair (@$data) {
                return ExtraFieldError("Not list of lists")
                    unless ref $pair eq 'ARRAY' ;

                my $bad = validateExtraFieldPair($pair, $strict, $gzipMode) ;
                return $bad if $bad ;

                $out .= mkSubField(@$pair);
            }   
        }   
        else {
            return ExtraFieldError("Not even number of elements")
                unless @$data % 2  == 0;

            for (my $ix = 0; $ix <= @$data -1 ; $ix += 2) {
                my $bad = validateExtraFieldPair([$data->[$ix],
                                                  $data->[$ix+1]], 
                                                 $strict, $gzipMode) ;
                return $bad if $bad ;

                $out .= mkSubField($data->[$ix], $data->[$ix+1]);
            }   
        }
    }   
    elsif (ref $data eq 'HASH') {    
        while (my ($id, $info) = each %$data) {
            my $bad = validateExtraFieldPair([$id, $info], $strict, $gzipMode);
            return $bad if $bad ;

            $out .= mkSubField($id, $info);
        }   
    }   
    else {
        return ExtraFieldError("Not a scalar, array ref or hash ref") ;
    }

    return ExtraFieldError("Too Large")
        if length $out > GZIP_FEXTRA_MAX_SIZE;

    $_[0] = $out ;

    return undef;
}

1;

__END__
PK     �siZ���z  z    Compress/Zlib/Constants.pmnu �[���        
package IO::Compress::Zlib::Constants ;

use strict ;
use warnings;
use bytes;

require Exporter;

our ($VERSION, @ISA, @EXPORT);

$VERSION = '2.061';

@ISA = qw(Exporter);

@EXPORT= qw(

        ZLIB_HEADER_SIZE
        ZLIB_TRAILER_SIZE

        ZLIB_CMF_CM_OFFSET
        ZLIB_CMF_CM_BITS
        ZLIB_CMF_CM_DEFLATED

        ZLIB_CMF_CINFO_OFFSET
        ZLIB_CMF_CINFO_BITS 
        ZLIB_CMF_CINFO_MAX

        ZLIB_FLG_FCHECK_OFFSET
        ZLIB_FLG_FCHECK_BITS

        ZLIB_FLG_FDICT_OFFSET
        ZLIB_FLG_FDICT_BITS

        ZLIB_FLG_LEVEL_OFFSET
        ZLIB_FLG_LEVEL_BITS

        ZLIB_FLG_LEVEL_FASTEST
        ZLIB_FLG_LEVEL_FAST
        ZLIB_FLG_LEVEL_DEFAULT
        ZLIB_FLG_LEVEL_SLOWEST

        ZLIB_FDICT_SIZE

        );

# Constant names derived from RFC1950

use constant ZLIB_HEADER_SIZE       => 2;
use constant ZLIB_TRAILER_SIZE      => 4;

use constant ZLIB_CMF_CM_OFFSET     => 0;
use constant ZLIB_CMF_CM_BITS       => 0xF ; # 0b1111
use constant ZLIB_CMF_CM_DEFLATED   => 8;

use constant ZLIB_CMF_CINFO_OFFSET  => 4;
use constant ZLIB_CMF_CINFO_BITS    => 0xF ; # 0b1111;
use constant ZLIB_CMF_CINFO_MAX     => 7;

use constant ZLIB_FLG_FCHECK_OFFSET => 0;
use constant ZLIB_FLG_FCHECK_BITS   => 0x1F ; # 0b11111;

use constant ZLIB_FLG_FDICT_OFFSET  => 5;
use constant ZLIB_FLG_FDICT_BITS    => 0x1 ; # 0b1;

use constant ZLIB_FLG_LEVEL_OFFSET  => 6;
use constant ZLIB_FLG_LEVEL_BITS    => 0x3 ; # 0b11;

use constant ZLIB_FLG_LEVEL_FASTEST => 0;
use constant ZLIB_FLG_LEVEL_FAST    => 1;
use constant ZLIB_FLG_LEVEL_DEFAULT => 2;
use constant ZLIB_FLG_LEVEL_SLOWEST => 3;

use constant ZLIB_FDICT_SIZE        => 4;


1;
PK     �siZ%9�`�  `�    Compress/Gzip.pmnu �[���        package IO::Compress::Gzip ;

require 5.006 ;

use strict ;
use warnings;
use bytes;

require Exporter ;

use IO::Compress::RawDeflate 2.061 () ; 
use IO::Compress::Adapter::Deflate 2.061 ;

use IO::Compress::Base::Common  2.061 qw(:Status );
use IO::Compress::Gzip::Constants 2.061 ;
use IO::Compress::Zlib::Extra 2.061 ;

BEGIN
{
    if (defined &utf8::downgrade ) 
      { *noUTF8 = \&utf8::downgrade }
    else
      { *noUTF8 = sub {} }  
}

our ($VERSION, @ISA, @EXPORT_OK, %EXPORT_TAGS, %DEFLATE_CONSTANTS, $GzipError);

$VERSION = '2.061';
$GzipError = '' ;

@ISA    = qw(Exporter IO::Compress::RawDeflate);
@EXPORT_OK = qw( $GzipError gzip ) ;
%EXPORT_TAGS = %IO::Compress::RawDeflate::DEFLATE_CONSTANTS ;

push @{ $EXPORT_TAGS{all} }, @EXPORT_OK ;
Exporter::export_ok_tags('all');

sub new
{
    my $class = shift ;

    my $obj = IO::Compress::Base::Common::createSelfTiedObject($class, \$GzipError);

    $obj->_create(undef, @_);
}


sub gzip
{
    my $obj = IO::Compress::Base::Common::createSelfTiedObject(undef, \$GzipError);
    return $obj->_def(@_);
}

#sub newHeader
#{
#    my $self = shift ;
#    #return GZIP_MINIMUM_HEADER ;
#    return $self->mkHeader(*$self->{Got});
#}

sub getExtraParams
{
    my $self = shift ;

    return (
            # zlib behaviour
            $self->getZlibParams(),
           
            # Gzip header fields
            'minimal'   => [IO::Compress::Base::Common::Parse_boolean,   0],
            'comment'   => [IO::Compress::Base::Common::Parse_any,       undef],
            'name'      => [IO::Compress::Base::Common::Parse_any,       undef],
            'time'      => [IO::Compress::Base::Common::Parse_any,       undef],
            'textflag'  => [IO::Compress::Base::Common::Parse_boolean,   0],
            'headercrc' => [IO::Compress::Base::Common::Parse_boolean,   0],
            'os_code'   => [IO::Compress::Base::Common::Parse_unsigned,  $Compress::Raw::Zlib::gzip_os_code],
            'extrafield'=> [IO::Compress::Base::Common::Parse_any,       undef],
            'extraflags'=> [IO::Compress::Base::Common::Parse_any,       undef],

        );
}


sub ckParams
{
    my $self = shift ;
    my $got = shift ;

    # gzip always needs crc32
    $got->setValue('crc32' => 1);

    return 1
        if $got->getValue('merge') ;

    my $strict = $got->getValue('strict') ;


    {
        if (! $got->parsed('time') ) {
            # Modification time defaults to now.
            $got->setValue(time => time) ;
        }

        # Check that the Name & Comment don't have embedded NULLs
        # Also check that they only contain ISO 8859-1 chars.
        if ($got->parsed('name') && defined $got->getValue('name')) {
            my $name = $got->getValue('name');
                
            return $self->saveErrorString(undef, "Null Character found in Name",
                                                Z_DATA_ERROR)
                if $strict && $name =~ /\x00/ ;

            return $self->saveErrorString(undef, "Non ISO 8859-1 Character found in Name",
                                                Z_DATA_ERROR)
                if $strict && $name =~ /$GZIP_FNAME_INVALID_CHAR_RE/o ;
        }

        if ($got->parsed('comment') && defined $got->getValue('comment')) {
            my $comment = $got->getValue('comment');

            return $self->saveErrorString(undef, "Null Character found in Comment",
                                                Z_DATA_ERROR)
                if $strict && $comment =~ /\x00/ ;

            return $self->saveErrorString(undef, "Non ISO 8859-1 Character found in Comment",
                                                Z_DATA_ERROR)
                if $strict && $comment =~ /$GZIP_FCOMMENT_INVALID_CHAR_RE/o;
        }

        if ($got->parsed('os_code') ) {
            my $value = $got->getValue('os_code');

            return $self->saveErrorString(undef, "OS_Code must be between 0 and 255, got '$value'")
                if $value < 0 || $value > 255 ;
            
        }

        # gzip only supports Deflate at present
        $got->setValue('method' => Z_DEFLATED) ;

        if ( ! $got->parsed('extraflags')) {
            $got->setValue('extraflags' => 2) 
                if $got->getValue('level') == Z_BEST_COMPRESSION ;
            $got->setValue('extraflags' => 4) 
                if $got->getValue('level') == Z_BEST_SPEED ;
        }

        my $data = $got->getValue('extrafield') ;
        if (defined $data) {
            my $bad = IO::Compress::Zlib::Extra::parseExtraField($data, $strict, 1) ;
            return $self->saveErrorString(undef, "Error with ExtraField Parameter: $bad", Z_DATA_ERROR)
                if $bad ;

            $got->setValue('extrafield' => $data) ;
        }
    }

    return 1;
}

sub mkTrailer
{
    my $self = shift ;
    return pack("V V", *$self->{Compress}->crc32(), 
                       *$self->{UnCompSize}->get32bit());
}

sub getInverseClass
{
    return ('IO::Uncompress::Gunzip',
                \$IO::Uncompress::Gunzip::GunzipError);
}

sub getFileInfo
{
    my $self = shift ;
    my $params = shift;
    my $filename = shift ;

    return if IO::Compress::Base::Common::isaScalar($filename);

    my $defaultTime = (stat($filename))[9] ;

    $params->setValue('name' => $filename)
        if ! $params->parsed('name') ;

    $params->setValue('time' => $defaultTime) 
        if ! $params->parsed('time') ;
}


sub mkHeader
{
    my $self = shift ;
    my $param = shift ;

    # stort-circuit if a minimal header is requested.
    return GZIP_MINIMUM_HEADER if $param->getValue('minimal') ;

    # METHOD
    my $method = $param->valueOrDefault('method', GZIP_CM_DEFLATED) ;

    # FLAGS
    my $flags       = GZIP_FLG_DEFAULT ;
    $flags |= GZIP_FLG_FTEXT    if $param->getValue('textflag') ;
    $flags |= GZIP_FLG_FHCRC    if $param->getValue('headercrc') ;
    $flags |= GZIP_FLG_FEXTRA   if $param->wantValue('extrafield') ;
    $flags |= GZIP_FLG_FNAME    if $param->wantValue('name') ;
    $flags |= GZIP_FLG_FCOMMENT if $param->wantValue('comment') ;
    
    # MTIME
    my $time = $param->valueOrDefault('time', GZIP_MTIME_DEFAULT) ;

    # EXTRA FLAGS
    my $extra_flags = $param->valueOrDefault('extraflags', GZIP_XFL_DEFAULT);

    # OS CODE
    my $os_code = $param->valueOrDefault('os_code', GZIP_OS_DEFAULT) ;


    my $out = pack("C4 V C C", 
            GZIP_ID1,   # ID1
            GZIP_ID2,   # ID2
            $method,    # Compression Method
            $flags,     # Flags
            $time,      # Modification Time
            $extra_flags, # Extra Flags
            $os_code,   # Operating System Code
            ) ;

    # EXTRA
    if ($flags & GZIP_FLG_FEXTRA) {
        my $extra = $param->getValue('extrafield') ;
        $out .= pack("v", length $extra) . $extra ;
    }

    # NAME
    if ($flags & GZIP_FLG_FNAME) {
        my $name .= $param->getValue('name') ;
        $name =~ s/\x00.*$//;
        $out .= $name ;
        # Terminate the filename with NULL unless it already is
        $out .= GZIP_NULL_BYTE 
            if !length $name or
               substr($name, 1, -1) ne GZIP_NULL_BYTE ;
    }

    # COMMENT
    if ($flags & GZIP_FLG_FCOMMENT) {
        my $comment .= $param->getValue('comment') ;
        $comment =~ s/\x00.*$//;
        $out .= $comment ;
        # Terminate the comment with NULL unless it already is
        $out .= GZIP_NULL_BYTE
            if ! length $comment or
               substr($comment, 1, -1) ne GZIP_NULL_BYTE;
    }

    # HEADER CRC
    $out .= pack("v", Compress::Raw::Zlib::crc32($out) & 0x00FF ) if $param->getValue('headercrc') ;

    noUTF8($out);

    return $out ;
}

sub mkFinalTrailer
{
    return '';
}

1; 

__END__

=head1 NAME

IO::Compress::Gzip - Write RFC 1952 files/buffers
 
 
=head1 SYNOPSIS

    use IO::Compress::Gzip qw(gzip $GzipError) ;

    my $status = gzip $input => $output [,OPTS] 
        or die "gzip failed: $GzipError\n";

    my $z = new IO::Compress::Gzip $output [,OPTS]
        or die "gzip failed: $GzipError\n";

    $z->print($string);
    $z->printf($format, $string);
    $z->write($string);
    $z->syswrite($string [, $length, $offset]);
    $z->flush();
    $z->tell();
    $z->eof();
    $z->seek($position, $whence);
    $z->binmode();
    $z->fileno();
    $z->opened();
    $z->autoflush();
    $z->input_line_number();
    $z->newStream( [OPTS] );
    
    $z->deflateParams();
    
    $z->close() ;

    $GzipError ;

    # IO::File mode

    print $z $string;
    printf $z $format, $string;
    tell $z
    eof $z
    seek $z, $position, $whence
    binmode $z
    fileno $z
    close $z ;
    

=head1 DESCRIPTION

This module provides a Perl interface that allows writing compressed
data to files or buffer as defined in RFC 1952.

All the gzip headers defined in RFC 1952 can be created using
this module.

For reading RFC 1952 files/buffers, see the companion module 
L<IO::Uncompress::Gunzip|IO::Uncompress::Gunzip>.

=head1 Functional Interface

A top-level function, C<gzip>, is provided to carry out
"one-shot" compression between buffers and/or files. For finer
control over the compression process, see the L</"OO Interface">
section.

    use IO::Compress::Gzip qw(gzip $GzipError) ;

    gzip $input_filename_or_reference => $output_filename_or_reference [,OPTS] 
        or die "gzip failed: $GzipError\n";

The functional interface needs Perl5.005 or better.

=head2 gzip $input_filename_or_reference => $output_filename_or_reference [, OPTS]

C<gzip> expects at least two parameters,
C<$input_filename_or_reference> and C<$output_filename_or_reference>.

=head3 The C<$input_filename_or_reference> parameter

The parameter, C<$input_filename_or_reference>, is used to define the
source of the uncompressed data. 

It can take one of the following forms:

=over 5

=item A filename

If the <$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 compressed.

=item An Input FileGlob string

If C<$input_filename_or_reference> is a string that is delimited by the
characters "<" and ">" C<gzip> 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.

In addition, if C<$input_filename_or_reference> is a simple filename, 
the default values for
the C<Name> and C<Time> options will be sourced from that file.

If you do not want to use these defaults they can be overridden by
explicitly setting the C<Name> and C<Time> options or by setting the
C<Minimal> parameter.

=head3 The C<$output_filename_or_reference> parameter

The parameter C<$output_filename_or_reference> is used to control the
destination of the compressed 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 
compressed data will be written to it.

=item A filehandle

If the C<$output_filename_or_reference> parameter is a filehandle, the
compressed 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
compressed 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 compressed 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<gzip> 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<$input_filename_or_reference> maps to multiple files/buffers and
C<$output_filename_or_reference> is a single
file/buffer the input files/buffers will be stored
in C<$output_filename_or_reference> as a concatenated series of compressed data streams.

=head2 Optional Parameters

Unless specified below, the optional parameters for C<gzip>,
C<OPTS>, are the same as those used with the OO interface defined in the
L</"Constructor Options"> section below.

=over 5

=item C<< AutoClose => 0|1 >>

This option applies to any input or output data streams to 
C<gzip> 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<gzip> has
completed.

This parameter defaults to 0.

=item C<< BinModeIn => 0|1 >>

When reading from a file or filehandle, set C<binmode> before reading.

Defaults to 0.

=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 compressed data will be append to the end of
the output buffer. Otherwise the output buffer will be cleared before any
compressed 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 compressed
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 compressed 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 compressed 
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 compressed data. If the output is a filename, it will be opened for
appending. If the output is a buffer, all compressed 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 compressed 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 compressed data is output.

Defaults to 0.

=back

=head2 Examples

To read the contents of the file C<file1.txt> and write the compressed
data to the file C<file1.txt.gz>.

    use strict ;
    use warnings ;
    use IO::Compress::Gzip qw(gzip $GzipError) ;

    my $input = "file1.txt";
    gzip $input => "$input.gz"
        or die "gzip failed: $GzipError\n";

To read from an existing Perl filehandle, C<$input>, and write the
compressed data to a buffer, C<$buffer>.

    use strict ;
    use warnings ;
    use IO::Compress::Gzip qw(gzip $GzipError) ;
    use IO::File ;

    my $input = new IO::File "<file1.txt"
        or die "Cannot open 'file1.txt': $!\n" ;
    my $buffer ;
    gzip $input => \$buffer 
        or die "gzip failed: $GzipError\n";

To compress all files in the directory "/my/home" that match "*.txt"
and store the compressed data in the same directory

    use strict ;
    use warnings ;
    use IO::Compress::Gzip qw(gzip $GzipError) ;

    gzip '</my/home/*.txt>' => '<*.gz>'
        or die "gzip failed: $GzipError\n";

and if you want to compress each file one at a time, this will do the trick

    use strict ;
    use warnings ;
    use IO::Compress::Gzip qw(gzip $GzipError) ;

    for my $input ( glob "/my/home/*.txt" )
    {
        my $output = "$input.gz" ;
        gzip $input => $output 
            or die "Error compressing '$input': $GzipError\n";
    }

=head1 OO Interface

=head2 Constructor

The format of the constructor for C<IO::Compress::Gzip> is shown below

    my $z = new IO::Compress::Gzip $output [,OPTS]
        or die "IO::Compress::Gzip failed: $GzipError\n";

It returns an C<IO::Compress::Gzip> object on success and undef on failure. 
The variable C<$GzipError> will contain an error message on failure.

If you are running Perl 5.005 or better the object, C<$z>, returned from 
IO::Compress::Gzip can be used exactly like an L<IO::File|IO::File> filehandle. 
This means that all normal output file operations can be carried out 
with C<$z>. 
For example, to write to a compressed file/buffer you can use either of 
these forms

    $z->print("hello world\n");
    print $z "hello world\n";

The mandatory parameter C<$output> is used to control the destination
of the compressed data. This parameter can take one of these forms.

=over 5

=item A filename

If the C<$output> parameter is a simple scalar, it is assumed to be a
filename. This file will be opened for writing and the compressed data
will be written to it.

=item A filehandle

If the C<$output> parameter is a filehandle, the compressed data will be
written to it.
The string '-' can be used as an alias for standard output.

=item A scalar reference 

If C<$output> is a scalar reference, the compressed data will be stored
in C<$$output>.

=back

If the C<$output> parameter is any other type, C<IO::Compress::Gzip>::new will
return undef.

=head2 Constructor Options

C<OPTS> is any combination of the following options:

=over 5

=item C<< AutoClose => 0|1 >>

This option is only valid when the C<$output> parameter is a filehandle. If
specified, and the value is true, it will result in the C<$output> being
closed once either the C<close> method is called or the C<IO::Compress::Gzip>
object is destroyed.

This parameter defaults to 0.

=item C<< Append => 0|1 >>

Opens C<$output> in append mode. 

The behaviour of this option is dependent on the type of C<$output>.

=over 5

=item * A Buffer

If C<$output> is a buffer and C<Append> is enabled, all compressed data
will be append to the end of C<$output>. Otherwise C<$output> will be
cleared before any data is written to it.

=item * A Filename

If C<$output> is a filename and 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 compressed data is written to it.

=item * A Filehandle

If C<$output> is a filehandle, the file pointer will be positioned to the
end of the file via a call to C<seek> before any compressed data is written
to it.  Otherwise the file pointer will not be moved.

=back

This parameter defaults to 0.

=item C<< Merge => 0|1 >>

This option is used to compress input data and append it to an existing
compressed data stream in C<$output>. The end result is a single compressed
data stream stored in C<$output>. 

It is a fatal error to attempt to use this option when C<$output> is not an
RFC 1952 data stream.

There are a number of other limitations with the C<Merge> option:

=over 5 

=item 1

This module needs to have been built with zlib 1.2.1 or better to work. A
fatal error will be thrown if C<Merge> is used with an older version of
zlib.  

=item 2

If C<$output> is a file or a filehandle, it must be seekable.

=back

This parameter defaults to 0.

=item -Level 

Defines the compression level used by zlib. The value should either be
a number between 0 and 9 (0 means no compression and 9 is maximum
compression), or one of the symbolic constants defined below.

   Z_NO_COMPRESSION
   Z_BEST_SPEED
   Z_BEST_COMPRESSION
   Z_DEFAULT_COMPRESSION

The default is Z_DEFAULT_COMPRESSION.

Note, these constants are not imported by C<IO::Compress::Gzip> by default.

    use IO::Compress::Gzip qw(:strategy);
    use IO::Compress::Gzip qw(:constants);
    use IO::Compress::Gzip qw(:all);

=item -Strategy 

Defines the strategy used to tune the compression. Use one of the symbolic
constants defined below.

   Z_FILTERED
   Z_HUFFMAN_ONLY
   Z_RLE
   Z_FIXED
   Z_DEFAULT_STRATEGY

The default is Z_DEFAULT_STRATEGY.

=item C<< Minimal => 0|1 >>

If specified, this option will force the creation of the smallest possible
compliant gzip header (which is exactly 10 bytes long) as defined in
RFC 1952.

See the section titled "Compliance" in RFC 1952 for a definition 
of the values used for the fields in the gzip header.

All other parameters that control the content of the gzip header will
be ignored if this parameter is set to 1.

This parameter defaults to 0.

=item C<< Comment => $comment >>

Stores the contents of C<$comment> in the COMMENT field in
the gzip header.
By default, no comment field is written to the gzip file.

If the C<-Strict> option is enabled, the comment can only consist of ISO
8859-1 characters plus line feed.

If the C<-Strict> option is disabled, the comment field can contain any
character except NULL. If any null characters are present, the field
will be truncated at the first NULL.

=item C<< Name => $string >>

Stores the contents of C<$string> in the gzip NAME header field. If
C<Name> is not specified, no gzip NAME field will be created.

If the C<-Strict> option is enabled, C<$string> can only consist of ISO
8859-1 characters.

If C<-Strict> is disabled, then C<$string> can contain any character
except NULL. If any null characters are present, the field will be
truncated at the first NULL.

=item C<< Time => $number >>

Sets the MTIME field in the gzip header to $number.

This field defaults to the time the C<IO::Compress::Gzip> object was created
if this option is not specified.

=item C<< TextFlag => 0|1 >>

This parameter controls the setting of the FLG.FTEXT bit in the gzip
header. It is used to signal that the data stored in the gzip file/buffer
is probably text.

The default is 0. 

=item C<< HeaderCRC => 0|1 >>

When true this parameter will set the FLG.FHCRC bit to 1 in the gzip header
and set the CRC16 header field to the CRC of the complete gzip header
except the CRC16 field itself.

B<Note> that gzip files created with the C<HeaderCRC> flag set to 1 cannot
be read by most, if not all, of the the standard gunzip utilities, most
notably gzip version 1.2.4. You should therefore avoid using this option if
you want to maximize the portability of your gzip files.

This parameter defaults to 0.

=item C<< OS_Code => $value >>

Stores C<$value> in the gzip OS header field. A number between 0 and 255 is
valid.

If not specified, this parameter defaults to the OS code of the Operating
System this module was built on. The value 3 is used as a catch-all for all
Unix variants and unknown Operating Systems.

=item C<< ExtraField => $data >>

This parameter allows additional metadata to be stored in the ExtraField in
the gzip header. An RFC 1952 compliant ExtraField consists of zero or more
subfields. Each subfield consists of a two byte header followed by the
subfield data.

The list of subfields can be supplied in any of the following formats

    -ExtraField => [$id1, $data1,
                    $id2, $data2,
                     ...
                   ]
    -ExtraField => [ [$id1 => $data1],
                     [$id2 => $data2],
                     ...
                   ]
    -ExtraField => { $id1 => $data1,
                     $id2 => $data2,
                     ...
                   }

Where C<$id1>, C<$id2> are two byte subfield ID's. The second byte of
the ID cannot be 0, unless the C<Strict> option has been disabled.

If you use the hash syntax, you have no control over the order in which
the ExtraSubFields are stored, plus you cannot have SubFields with
duplicate ID.

Alternatively the list of subfields can by supplied as a scalar, thus

    -ExtraField => $rawdata

If you use the raw format, and the C<Strict> option is enabled,
C<IO::Compress::Gzip> will check that C<$rawdata> consists of zero or more
conformant sub-fields. When C<Strict> is disabled, C<$rawdata> can
consist of any arbitrary byte stream.

The maximum size of the Extra Field 65535 bytes.

=item C<< ExtraFlags => $value >>

Sets the XFL byte in the gzip header to C<$value>.

If this option is not present, the value stored in XFL field will be
determined by the setting of the C<Level> option.

If C<< Level => Z_BEST_SPEED >> has been specified then XFL is set to 2.
If C<< Level => Z_BEST_COMPRESSION >> has been specified then XFL is set to 4.
Otherwise XFL is set to 0.

=item C<< Strict => 0|1 >>

C<Strict> will optionally police the values supplied with other options
to ensure they are compliant with RFC1952.

This option is enabled by default.

If C<Strict> is enabled the following behaviour will be policed:

=over 5

=item * 

The value supplied with the C<Name> option can only contain ISO 8859-1
characters.

=item * 

The value supplied with the C<Comment> option can only contain ISO 8859-1
characters plus line-feed.

=item *

The values supplied with the C<-Name> and C<-Comment> options cannot
contain multiple embedded nulls.

=item * 

If an C<ExtraField> option is specified and it is a simple scalar,
it must conform to the sub-field structure as defined in RFC 1952.

=item * 

If an C<ExtraField> option is specified the second byte of the ID will be
checked in each subfield to ensure that it does not contain the reserved
value 0x00.

=back

When C<Strict> is disabled the following behaviour will be policed:

=over 5

=item * 

The value supplied with C<-Name> option can contain
any character except NULL.

=item * 

The value supplied with C<-Comment> option can contain any character
except NULL.

=item *

The values supplied with the C<-Name> and C<-Comment> options can contain
multiple embedded nulls. The string written to the gzip header will
consist of the characters up to, but not including, the first embedded
NULL.

=item * 

If an C<ExtraField> option is specified and it is a simple scalar, the
structure will not be checked. The only error is if the length is too big.

=item * 

The ID header in an C<ExtraField> sub-field can consist of any two bytes.

=back

=back

=head2 Examples

TODO

=head1 Methods 

=head2 print

Usage is

    $z->print($data)
    print $z $data

Compresses and outputs the contents of the C<$data> parameter. This
has the same behaviour as the C<print> built-in.

Returns true if successful.

=head2 printf

Usage is

    $z->printf($format, $data)
    printf $z $format, $data

Compresses and outputs the contents of the C<$data> parameter.

Returns true if successful.

=head2 syswrite

Usage is

    $z->syswrite $data
    $z->syswrite $data, $length
    $z->syswrite $data, $length, $offset

Compresses and outputs the contents of the C<$data> parameter.

Returns the number of uncompressed bytes written, or C<undef> if
unsuccessful.

=head2 write

Usage is

    $z->write $data
    $z->write $data, $length
    $z->write $data, $length, $offset

Compresses and outputs the contents of the C<$data> parameter.

Returns the number of uncompressed bytes written, or C<undef> if
unsuccessful.

=head2 flush

Usage is

    $z->flush;
    $z->flush($flush_type);

Flushes any pending compressed data to the output file/buffer.

This method takes an optional parameter, C<$flush_type>, that controls
how the flushing will be carried out. By default the C<$flush_type>
used is C<Z_FINISH>. Other valid values for C<$flush_type> are
C<Z_NO_FLUSH>, C<Z_SYNC_FLUSH>, C<Z_FULL_FLUSH> and C<Z_BLOCK>. It is
strongly recommended that you only set the C<flush_type> parameter if
you fully understand the implications of what it does - overuse of C<flush>
can seriously degrade the level of compression achieved. See the C<zlib>
documentation for details.

Returns true on success.

=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 C<close> method has been called.

=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 output file/buffer.
It is a fatal error to attempt to seek backward.

Empty parts of the file/buffer will have NULL (0x00) bytes written to them.

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)

This method always returns C<undef> when compressing. 

=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 ;

Flushes any pending compressed data and then closes the output file/buffer. 

For most versions of Perl this method will be automatically invoked if
the IO::Compress::Gzip 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::Compress::Gzip
object was created, and the object is associated with a file, the
underlying file will also be closed.

=head2 newStream([OPTS])

Usage is

    $z->newStream( [OPTS] )

Closes the current compressed data stream and starts a new one.

OPTS consists of any of the the options that are available when creating
the C<$z> object.

See the L</"Constructor Options"> section for more details.

=head2 deflateParams

Usage is

    $z->deflateParams

TODO

=head1 Importing 

A number of symbolic constants are required by some methods in 
C<IO::Compress::Gzip>. None are imported by default.

=over 5

=item :all

Imports C<gzip>, C<$GzipError> and all symbolic
constants that can be used by C<IO::Compress::Gzip>. Same as doing this

    use IO::Compress::Gzip qw(gzip $GzipError :constants) ;

=item :constants

Import all symbolic constants. Same as doing this

    use IO::Compress::Gzip qw(:flush :level :strategy) ;

=item :flush

These symbolic constants are used by the C<flush> method.

    Z_NO_FLUSH
    Z_PARTIAL_FLUSH
    Z_SYNC_FLUSH
    Z_FULL_FLUSH
    Z_FINISH
    Z_BLOCK

=item :level

These symbolic constants are used by the C<Level> option in the constructor.

    Z_NO_COMPRESSION
    Z_BEST_SPEED
    Z_BEST_COMPRESSION
    Z_DEFAULT_COMPRESSION

=item :strategy

These symbolic constants are used by the C<Strategy> option in the constructor.

    Z_FILTERED
    Z_HUFFMAN_ONLY
    Z_RLE
    Z_FIXED
    Z_DEFAULT_STRATEGY

    
=back

=head1 EXAMPLES

=head2 Apache::GZip Revisited

See L<IO::Compress::FAQ|IO::Compress::FAQ/"Apache::GZip Revisited">

=head2 Working with Net::FTP

See L<IO::Compress::FAQ|IO::Compress::FAQ/"Compressed files and Net::FTP">

=head1 SEE ALSO

L<Compress::Zlib>, 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::Lzop>, L<IO::Uncompress::UnLzop>, L<IO::Compress::Lzf>, L<IO::Uncompress::UnLzf>, 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 
F<http://www.faqs.org/rfcs/rfc1950.html>,
F<http://www.faqs.org/rfcs/rfc1951.html> and
F<http://www.faqs.org/rfcs/rfc1952.html>

The I<zlib> compression library was written by Jean-loup Gailly
F<gzip@prep.ai.mit.edu> and Mark Adler F<madler@alumni.caltech.edu>.

The primary site for the I<zlib> compression library is
F<http://www.zlib.org>.

The primary site for gzip is F<http://www.gzip.org>.

=head1 AUTHOR

This module was written by Paul Marquess, F<pmqs@cpan.org>. 

=head1 MODIFICATION HISTORY

See the Changes file.

=head1 COPYRIGHT AND LICENSE

Copyright (c) 2005-2013 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     �siZ�[Z�\\  \\    Compress/Deflate.pmnu �[���        package IO::Compress::Deflate ;

require 5.006 ;

use strict ;
use warnings;
use bytes;

require Exporter ;

use IO::Compress::RawDeflate 2.061 ();
use IO::Compress::Adapter::Deflate 2.061 ;

use IO::Compress::Zlib::Constants 2.061 ;
use IO::Compress::Base::Common  2.061 qw();


our ($VERSION, @ISA, @EXPORT_OK, %EXPORT_TAGS, %DEFLATE_CONSTANTS, $DeflateError);

$VERSION = '2.061';
$DeflateError = '';

@ISA    = qw(Exporter IO::Compress::RawDeflate);
@EXPORT_OK = qw( $DeflateError deflate ) ;
%EXPORT_TAGS = %IO::Compress::RawDeflate::DEFLATE_CONSTANTS ;

push @{ $EXPORT_TAGS{all} }, @EXPORT_OK ;
Exporter::export_ok_tags('all');


sub new
{
    my $class = shift ;

    my $obj = IO::Compress::Base::Common::createSelfTiedObject($class, \$DeflateError);
    return $obj->_create(undef, @_);
}

sub deflate
{
    my $obj = IO::Compress::Base::Common::createSelfTiedObject(undef, \$DeflateError);
    return $obj->_def(@_);
}


sub bitmask($$$$)
{
    my $into  = shift ;
    my $value  = shift ;
    my $offset = shift ;
    my $mask   = shift ;

    return $into | (($value & $mask) << $offset ) ;
}

sub mkDeflateHdr($$$;$)
{
    my $method = shift ;
    my $cinfo  = shift;
    my $level  = shift;
    my $fdict_adler = shift  ;

    my $cmf = 0;
    my $flg = 0;
    my $fdict = 0;
    $fdict = 1 if defined $fdict_adler;

    $cmf = bitmask($cmf, $method, ZLIB_CMF_CM_OFFSET,    ZLIB_CMF_CM_BITS);
    $cmf = bitmask($cmf, $cinfo,  ZLIB_CMF_CINFO_OFFSET, ZLIB_CMF_CINFO_BITS);

    $flg = bitmask($flg, $fdict,  ZLIB_FLG_FDICT_OFFSET, ZLIB_FLG_FDICT_BITS);
    $flg = bitmask($flg, $level,  ZLIB_FLG_LEVEL_OFFSET, ZLIB_FLG_LEVEL_BITS);

    my $fcheck = 31 - ($cmf * 256 + $flg) % 31 ;
    $flg = bitmask($flg, $fcheck, ZLIB_FLG_FCHECK_OFFSET, ZLIB_FLG_FCHECK_BITS);

    my $hdr =  pack("CC", $cmf, $flg) ;
    $hdr .= pack("N", $fdict_adler) if $fdict ;

    return $hdr;
}

sub mkHeader 
{
    my $self = shift ;
    my $param = shift ;

    my $level = $param->getValue('level');
    my $strategy = $param->getValue('strategy');

    my $lflag ;
    $level = 6 
        if $level == Z_DEFAULT_COMPRESSION ;

    if (ZLIB_VERNUM >= 0x1210)
    {
        if ($strategy >= Z_HUFFMAN_ONLY || $level < 2)
         {  $lflag = ZLIB_FLG_LEVEL_FASTEST }
        elsif ($level < 6)
         {  $lflag = ZLIB_FLG_LEVEL_FAST }
        elsif ($level == 6)
         {  $lflag = ZLIB_FLG_LEVEL_DEFAULT }
        else
         {  $lflag = ZLIB_FLG_LEVEL_SLOWEST }
    }
    else
    {
        $lflag = ($level - 1) >> 1 ;
        $lflag = 3 if $lflag > 3 ;
    }

     #my $wbits = (MAX_WBITS - 8) << 4 ;
    my $wbits = 7;
    mkDeflateHdr(ZLIB_CMF_CM_DEFLATED, $wbits, $lflag);
}

sub ckParams
{
    my $self = shift ;
    my $got = shift;
    
    $got->setValue('adler32' => 1);
    return 1 ;
}


sub mkTrailer
{
    my $self = shift ;
    return pack("N", *$self->{Compress}->adler32()) ;
}

sub mkFinalTrailer
{
    return '';
}

#sub newHeader
#{
#    my $self = shift ;
#    return *$self->{Header};
#}

sub getExtraParams
{
    my $self = shift ;
    return $self->getZlibParams(),
}

sub getInverseClass
{
    return ('IO::Uncompress::Inflate',
                \$IO::Uncompress::Inflate::InflateError);
}

sub getFileInfo
{
    my $self = shift ;
    my $params = shift;
    my $file = shift ;
    
}


1;

__END__

=head1 NAME

IO::Compress::Deflate - Write RFC 1950 files/buffers
 
 
=head1 SYNOPSIS

    use IO::Compress::Deflate qw(deflate $DeflateError) ;

    my $status = deflate $input => $output [,OPTS] 
        or die "deflate failed: $DeflateError\n";

    my $z = new IO::Compress::Deflate $output [,OPTS]
        or die "deflate failed: $DeflateError\n";

    $z->print($string);
    $z->printf($format, $string);
    $z->write($string);
    $z->syswrite($string [, $length, $offset]);
    $z->flush();
    $z->tell();
    $z->eof();
    $z->seek($position, $whence);
    $z->binmode();
    $z->fileno();
    $z->opened();
    $z->autoflush();
    $z->input_line_number();
    $z->newStream( [OPTS] );
    
    $z->deflateParams();
    
    $z->close() ;

    $DeflateError ;

    # IO::File mode

    print $z $string;
    printf $z $format, $string;
    tell $z
    eof $z
    seek $z, $position, $whence
    binmode $z
    fileno $z
    close $z ;
    

=head1 DESCRIPTION

This module provides a Perl interface that allows writing compressed
data to files or buffer as defined in RFC 1950.

For reading RFC 1950 files/buffers, see the companion module 
L<IO::Uncompress::Inflate|IO::Uncompress::Inflate>.

=head1 Functional Interface

A top-level function, C<deflate>, is provided to carry out
"one-shot" compression between buffers and/or files. For finer
control over the compression process, see the L</"OO Interface">
section.

    use IO::Compress::Deflate qw(deflate $DeflateError) ;

    deflate $input_filename_or_reference => $output_filename_or_reference [,OPTS] 
        or die "deflate failed: $DeflateError\n";

The functional interface needs Perl5.005 or better.

=head2 deflate $input_filename_or_reference => $output_filename_or_reference [, OPTS]

C<deflate> expects at least two parameters,
C<$input_filename_or_reference> and C<$output_filename_or_reference>.

=head3 The C<$input_filename_or_reference> parameter

The parameter, C<$input_filename_or_reference>, is used to define the
source of the uncompressed data. 

It can take one of the following forms:

=over 5

=item A filename

If the <$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 compressed.

=item An Input FileGlob string

If C<$input_filename_or_reference> is a string that is delimited by the
characters "<" and ">" C<deflate> 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 compressed 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 
compressed data will be written to it.

=item A filehandle

If the C<$output_filename_or_reference> parameter is a filehandle, the
compressed 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
compressed 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 compressed 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<deflate> 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<$input_filename_or_reference> maps to multiple files/buffers and
C<$output_filename_or_reference> is a single
file/buffer the input files/buffers will be stored
in C<$output_filename_or_reference> as a concatenated series of compressed data streams.

=head2 Optional Parameters

Unless specified below, the optional parameters for C<deflate>,
C<OPTS>, are the same as those used with the OO interface defined in the
L</"Constructor Options"> section below.

=over 5

=item C<< AutoClose => 0|1 >>

This option applies to any input or output data streams to 
C<deflate> 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<deflate> has
completed.

This parameter defaults to 0.

=item C<< BinModeIn => 0|1 >>

When reading from a file or filehandle, set C<binmode> before reading.

Defaults to 0.

=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 compressed data will be append to the end of
the output buffer. Otherwise the output buffer will be cleared before any
compressed 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 compressed
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 compressed 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 compressed 
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 compressed data. If the output is a filename, it will be opened for
appending. If the output is a buffer, all compressed 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 compressed 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 compressed data is output.

Defaults to 0.

=back

=head2 Examples

To read the contents of the file C<file1.txt> and write the compressed
data to the file C<file1.txt.1950>.

    use strict ;
    use warnings ;
    use IO::Compress::Deflate qw(deflate $DeflateError) ;

    my $input = "file1.txt";
    deflate $input => "$input.1950"
        or die "deflate failed: $DeflateError\n";

To read from an existing Perl filehandle, C<$input>, and write the
compressed data to a buffer, C<$buffer>.

    use strict ;
    use warnings ;
    use IO::Compress::Deflate qw(deflate $DeflateError) ;
    use IO::File ;

    my $input = new IO::File "<file1.txt"
        or die "Cannot open 'file1.txt': $!\n" ;
    my $buffer ;
    deflate $input => \$buffer 
        or die "deflate failed: $DeflateError\n";

To compress all files in the directory "/my/home" that match "*.txt"
and store the compressed data in the same directory

    use strict ;
    use warnings ;
    use IO::Compress::Deflate qw(deflate $DeflateError) ;

    deflate '</my/home/*.txt>' => '<*.1950>'
        or die "deflate failed: $DeflateError\n";

and if you want to compress each file one at a time, this will do the trick

    use strict ;
    use warnings ;
    use IO::Compress::Deflate qw(deflate $DeflateError) ;

    for my $input ( glob "/my/home/*.txt" )
    {
        my $output = "$input.1950" ;
        deflate $input => $output 
            or die "Error compressing '$input': $DeflateError\n";
    }

=head1 OO Interface

=head2 Constructor

The format of the constructor for C<IO::Compress::Deflate> is shown below

    my $z = new IO::Compress::Deflate $output [,OPTS]
        or die "IO::Compress::Deflate failed: $DeflateError\n";

It returns an C<IO::Compress::Deflate> object on success and undef on failure. 
The variable C<$DeflateError> will contain an error message on failure.

If you are running Perl 5.005 or better the object, C<$z>, returned from 
IO::Compress::Deflate can be used exactly like an L<IO::File|IO::File> filehandle. 
This means that all normal output file operations can be carried out 
with C<$z>. 
For example, to write to a compressed file/buffer you can use either of 
these forms

    $z->print("hello world\n");
    print $z "hello world\n";

The mandatory parameter C<$output> is used to control the destination
of the compressed data. This parameter can take one of these forms.

=over 5

=item A filename

If the C<$output> parameter is a simple scalar, it is assumed to be a
filename. This file will be opened for writing and the compressed data
will be written to it.

=item A filehandle

If the C<$output> parameter is a filehandle, the compressed data will be
written to it.
The string '-' can be used as an alias for standard output.

=item A scalar reference 

If C<$output> is a scalar reference, the compressed data will be stored
in C<$$output>.

=back

If the C<$output> parameter is any other type, C<IO::Compress::Deflate>::new will
return undef.

=head2 Constructor Options

C<OPTS> is any combination of the following options:

=over 5

=item C<< AutoClose => 0|1 >>

This option is only valid when the C<$output> parameter is a filehandle. If
specified, and the value is true, it will result in the C<$output> being
closed once either the C<close> method is called or the C<IO::Compress::Deflate>
object is destroyed.

This parameter defaults to 0.

=item C<< Append => 0|1 >>

Opens C<$output> in append mode. 

The behaviour of this option is dependent on the type of C<$output>.

=over 5

=item * A Buffer

If C<$output> is a buffer and C<Append> is enabled, all compressed data
will be append to the end of C<$output>. Otherwise C<$output> will be
cleared before any data is written to it.

=item * A Filename

If C<$output> is a filename and 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 compressed data is written to it.

=item * A Filehandle

If C<$output> is a filehandle, the file pointer will be positioned to the
end of the file via a call to C<seek> before any compressed data is written
to it.  Otherwise the file pointer will not be moved.

=back

This parameter defaults to 0.

=item C<< Merge => 0|1 >>

This option is used to compress input data and append it to an existing
compressed data stream in C<$output>. The end result is a single compressed
data stream stored in C<$output>. 

It is a fatal error to attempt to use this option when C<$output> is not an
RFC 1950 data stream.

There are a number of other limitations with the C<Merge> option:

=over 5 

=item 1

This module needs to have been built with zlib 1.2.1 or better to work. A
fatal error will be thrown if C<Merge> is used with an older version of
zlib.  

=item 2

If C<$output> is a file or a filehandle, it must be seekable.

=back

This parameter defaults to 0.

=item -Level 

Defines the compression level used by zlib. The value should either be
a number between 0 and 9 (0 means no compression and 9 is maximum
compression), or one of the symbolic constants defined below.

   Z_NO_COMPRESSION
   Z_BEST_SPEED
   Z_BEST_COMPRESSION
   Z_DEFAULT_COMPRESSION

The default is Z_DEFAULT_COMPRESSION.

Note, these constants are not imported by C<IO::Compress::Deflate> by default.

    use IO::Compress::Deflate qw(:strategy);
    use IO::Compress::Deflate qw(:constants);
    use IO::Compress::Deflate qw(:all);

=item -Strategy 

Defines the strategy used to tune the compression. Use one of the symbolic
constants defined below.

   Z_FILTERED
   Z_HUFFMAN_ONLY
   Z_RLE
   Z_FIXED
   Z_DEFAULT_STRATEGY

The default is Z_DEFAULT_STRATEGY.

=item C<< Strict => 0|1 >>

This is a placeholder option.

=back

=head2 Examples

TODO

=head1 Methods 

=head2 print

Usage is

    $z->print($data)
    print $z $data

Compresses and outputs the contents of the C<$data> parameter. This
has the same behaviour as the C<print> built-in.

Returns true if successful.

=head2 printf

Usage is

    $z->printf($format, $data)
    printf $z $format, $data

Compresses and outputs the contents of the C<$data> parameter.

Returns true if successful.

=head2 syswrite

Usage is

    $z->syswrite $data
    $z->syswrite $data, $length
    $z->syswrite $data, $length, $offset

Compresses and outputs the contents of the C<$data> parameter.

Returns the number of uncompressed bytes written, or C<undef> if
unsuccessful.

=head2 write

Usage is

    $z->write $data
    $z->write $data, $length
    $z->write $data, $length, $offset

Compresses and outputs the contents of the C<$data> parameter.

Returns the number of uncompressed bytes written, or C<undef> if
unsuccessful.

=head2 flush

Usage is

    $z->flush;
    $z->flush($flush_type);

Flushes any pending compressed data to the output file/buffer.

This method takes an optional parameter, C<$flush_type>, that controls
how the flushing will be carried out. By default the C<$flush_type>
used is C<Z_FINISH>. Other valid values for C<$flush_type> are
C<Z_NO_FLUSH>, C<Z_SYNC_FLUSH>, C<Z_FULL_FLUSH> and C<Z_BLOCK>. It is
strongly recommended that you only set the C<flush_type> parameter if
you fully understand the implications of what it does - overuse of C<flush>
can seriously degrade the level of compression achieved. See the C<zlib>
documentation for details.

Returns true on success.

=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 C<close> method has been called.

=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 output file/buffer.
It is a fatal error to attempt to seek backward.

Empty parts of the file/buffer will have NULL (0x00) bytes written to them.

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)

This method always returns C<undef> when compressing. 

=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 ;

Flushes any pending compressed data and then closes the output file/buffer. 

For most versions of Perl this method will be automatically invoked if
the IO::Compress::Deflate 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::Compress::Deflate
object was created, and the object is associated with a file, the
underlying file will also be closed.

=head2 newStream([OPTS])

Usage is

    $z->newStream( [OPTS] )

Closes the current compressed data stream and starts a new one.

OPTS consists of any of the the options that are available when creating
the C<$z> object.

See the L</"Constructor Options"> section for more details.

=head2 deflateParams

Usage is

    $z->deflateParams

TODO

=head1 Importing 

A number of symbolic constants are required by some methods in 
C<IO::Compress::Deflate>. None are imported by default.

=over 5

=item :all

Imports C<deflate>, C<$DeflateError> and all symbolic
constants that can be used by C<IO::Compress::Deflate>. Same as doing this

    use IO::Compress::Deflate qw(deflate $DeflateError :constants) ;

=item :constants

Import all symbolic constants. Same as doing this

    use IO::Compress::Deflate qw(:flush :level :strategy) ;

=item :flush

These symbolic constants are used by the C<flush> method.

    Z_NO_FLUSH
    Z_PARTIAL_FLUSH
    Z_SYNC_FLUSH
    Z_FULL_FLUSH
    Z_FINISH
    Z_BLOCK

=item :level

These symbolic constants are used by the C<Level> option in the constructor.

    Z_NO_COMPRESSION
    Z_BEST_SPEED
    Z_BEST_COMPRESSION
    Z_DEFAULT_COMPRESSION

=item :strategy

These symbolic constants are used by the C<Strategy> option in the constructor.

    Z_FILTERED
    Z_HUFFMAN_ONLY
    Z_RLE
    Z_FIXED
    Z_DEFAULT_STRATEGY

    
=back

=head1 EXAMPLES

=head2 Apache::GZip Revisited

See L<IO::Compress::FAQ|IO::Compress::FAQ/"Apache::GZip Revisited">

=head2 Working with Net::FTP

See L<IO::Compress::FAQ|IO::Compress::FAQ/"Compressed files and Net::FTP">

=head1 SEE ALSO

L<Compress::Zlib>, L<IO::Compress::Gzip>, L<IO::Uncompress::Gunzip>, 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::Lzop>, L<IO::Uncompress::UnLzop>, L<IO::Compress::Lzf>, L<IO::Uncompress::UnLzf>, 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 
F<http://www.faqs.org/rfcs/rfc1950.html>,
F<http://www.faqs.org/rfcs/rfc1951.html> and
F<http://www.faqs.org/rfcs/rfc1952.html>

The I<zlib> compression library was written by Jean-loup Gailly
F<gzip@prep.ai.mit.edu> and Mark Adler F<madler@alumni.caltech.edu>.

The primary site for the I<zlib> compression library is
F<http://www.zlib.org>.

The primary site for gzip is F<http://www.gzip.org>.

=head1 AUTHOR

This module was written by Paul Marquess, F<pmqs@cpan.org>. 

=head1 MODIFICATION HISTORY

See the Changes file.

=head1 COPYRIGHT AND LICENSE

Copyright (c) 2005-2013 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     �siZ���]  ]    Compress/Base.pmnu �[���        
package IO::Compress::Base ;

require 5.006 ;

use strict ;
use warnings;

use IO::Compress::Base::Common 2.061 ;

use IO::File (); ;
use Scalar::Util ();

#use File::Glob;
#require Exporter ;
use Carp() ;
use Symbol();
#use bytes;

our (@ISA, $VERSION);
@ISA    = qw(Exporter IO::File);

$VERSION = '2.061';

#Can't locate object method "SWASHNEW" via package "utf8" (perhaps you forgot to load "utf8"?) at .../ext/Compress-Zlib/Gzip/blib/lib/Compress/Zlib/Common.pm line 16.

sub saveStatus
{
    my $self   = shift ;
    ${ *$self->{ErrorNo} } = shift() + 0 ;
    ${ *$self->{Error} } = '' ;

    return ${ *$self->{ErrorNo} } ;
}


sub saveErrorString
{
    my $self   = shift ;
    my $retval = shift ;
    ${ *$self->{Error} } = shift ;
    ${ *$self->{ErrorNo} } = shift() + 0 if @_ ;

    return $retval;
}

sub croakError
{
    my $self   = shift ;
    $self->saveErrorString(0, $_[0]);
    Carp::croak $_[0];
}

sub closeError
{
    my $self = shift ;
    my $retval = shift ;

    my $errno = *$self->{ErrorNo};
    my $error = ${ *$self->{Error} };

    $self->close();

    *$self->{ErrorNo} = $errno ;
    ${ *$self->{Error} } = $error ;

    return $retval;
}


sub error
{
    my $self   = shift ;
    return ${ *$self->{Error} } ;
}

sub errorNo
{
    my $self   = shift ;
    return ${ *$self->{ErrorNo} } ;
}


sub writeAt
{
    my $self = shift ;
    my $offset = shift;
    my $data = shift;

    if (defined *$self->{FH}) {
        my $here = tell(*$self->{FH});
        return $self->saveErrorString(undef, "Cannot seek to end of output filehandle: $!", $!) 
            if $here < 0 ;
        seek(*$self->{FH}, $offset, IO::Handle::SEEK_SET)
            or return $self->saveErrorString(undef, "Cannot seek to end of output filehandle: $!", $!) ;
        defined *$self->{FH}->write($data, length $data)
            or return $self->saveErrorString(undef, $!, $!) ;
        seek(*$self->{FH}, $here, IO::Handle::SEEK_SET)
            or return $self->saveErrorString(undef, "Cannot seek to end of output filehandle: $!", $!) ;
    }
    else {
        substr(${ *$self->{Buffer} }, $offset, length($data)) = $data ;
    }

    return 1;
}

sub outputPayload
{

    my $self = shift ;
    return $self->output(@_);
}


sub output
{
    my $self = shift ;
    my $data = shift ;
    my $last = shift ;

    return 1 
        if length $data == 0 && ! $last ;

    if ( *$self->{FilterContainer} ) {
        *_ = \$data;
        &{ *$self->{FilterContainer} }();
    }

    if (length $data) {
        if ( defined *$self->{FH} ) {
                defined *$self->{FH}->write( $data, length $data )
                or return $self->saveErrorString(0, $!, $!); 
        }
        else {
                ${ *$self->{Buffer} } .= $data ;
        }
    }

    return 1;
}

sub getOneShotParams
{
    return ( 'multistream' => [IO::Compress::Base::Common::Parse_boolean,   1],
           );
}

our %PARAMS = (
            # Generic Parameters
            'autoclose' => [IO::Compress::Base::Common::Parse_boolean,   0],
            'encode'    => [IO::Compress::Base::Common::Parse_any,       undef],
            'strict'    => [IO::Compress::Base::Common::Parse_boolean,   1],
            'append'    => [IO::Compress::Base::Common::Parse_boolean,   0],
            'binmodein' => [IO::Compress::Base::Common::Parse_boolean,   0],

            'filtercontainer' => [IO::Compress::Base::Common::Parse_code,  undef],
        );
        
sub checkParams
{
    my $self = shift ;
    my $class = shift ;

    my $got = shift || IO::Compress::Base::Parameters::new();

    $got->parse(
        {
            %PARAMS,


            $self->getExtraParams(),
            *$self->{OneShot} ? $self->getOneShotParams() 
                              : (),
        }, 
        @_) or $self->croakError("${class}: " . $got->getError())  ;

    return $got ;
}

sub _create
{
    my $obj = shift;
    my $got = shift;

    *$obj->{Closed} = 1 ;

    my $class = ref $obj;
    $obj->croakError("$class: Missing Output parameter")
        if ! @_ && ! $got ;

    my $outValue = shift ;
    my $oneShot = 1 ;

    if (! $got)
    {
        $oneShot = 0 ;
        $got = $obj->checkParams($class, undef, @_)
            or return undef ;
    }

    my $lax = ! $got->getValue('strict') ;

    my $outType = IO::Compress::Base::Common::whatIsOutput($outValue);

    $obj->ckOutputParam($class, $outValue)
        or return undef ;

    if ($outType eq 'buffer') {
        *$obj->{Buffer} = $outValue;
    }
    else {
        my $buff = "" ;
        *$obj->{Buffer} = \$buff ;
    }

    # Merge implies Append
    my $merge = $got->getValue('merge') ;
    my $appendOutput = $got->getValue('append') || $merge ;
    *$obj->{Append} = $appendOutput;
    *$obj->{FilterContainer} = $got->getValue('filtercontainer') ;

    if ($merge)
    {
        # Switch off Merge mode if output file/buffer is empty/doesn't exist
        if (($outType eq 'buffer' && length $$outValue == 0 ) ||
            ($outType ne 'buffer' && (! -e $outValue || (-w _ && -z _))) )
          { $merge = 0 }
    }

    # If output is a file, check that it is writable
    #no warnings;
    #if ($outType eq 'filename' && -e $outValue && ! -w _)
    #  { return $obj->saveErrorString(undef, "Output file '$outValue' is not writable" ) }

    $obj->ckParams($got)
        or $obj->croakError("${class}: " . $obj->error());

    if ($got->getValue('encode')) { 
        my $want_encoding = $got->getValue('encode');
        *$obj->{Encoding} = IO::Compress::Base::Common::getEncoding($obj, $class, $want_encoding);
        my $x = *$obj->{Encoding}; 
    }
    else {
        *$obj->{Encoding} = undef; 
    }
    
    $obj->saveStatus(STATUS_OK) ;

    my $status ;
    if (! $merge)
    {
        *$obj->{Compress} = $obj->mkComp($got)
            or return undef;
        
        *$obj->{UnCompSize} = new U64 ;
        *$obj->{CompSize} = new U64 ;

        if ( $outType eq 'buffer') {
            ${ *$obj->{Buffer} }  = ''
                unless $appendOutput ;
        }
        else {
            if ($outType eq 'handle') {
                *$obj->{FH} = $outValue ;
                setBinModeOutput(*$obj->{FH}) ;
                #$outValue->flush() ;
                *$obj->{Handle} = 1 ;
                if ($appendOutput)
                {
                    seek(*$obj->{FH}, 0, IO::Handle::SEEK_END)
                        or return $obj->saveErrorString(undef, "Cannot seek to end of output filehandle: $!", $!) ;

                }
            }
            elsif ($outType eq 'filename') {    
                no warnings;
                my $mode = '>' ;
                $mode = '>>'
                    if $appendOutput;
                *$obj->{FH} = new IO::File "$mode $outValue" 
                    or return $obj->saveErrorString(undef, "cannot open file '$outValue': $!", $!) ;
                *$obj->{StdIO} = ($outValue eq '-'); 
                setBinModeOutput(*$obj->{FH}) ;
            }
        }

        *$obj->{Header} = $obj->mkHeader($got) ;
        $obj->output( *$obj->{Header} )
            or return undef;
        $obj->beforePayload();
    }
    else
    {
        *$obj->{Compress} = $obj->createMerge($outValue, $outType)
            or return undef;
    }

    *$obj->{Closed} = 0 ;
    *$obj->{AutoClose} = $got->getValue('autoclose') ;
    *$obj->{Output} = $outValue;
    *$obj->{ClassName} = $class;
    *$obj->{Got} = $got;
    *$obj->{OneShot} = 0 ;

    return $obj ;
}

sub ckOutputParam 
{
    my $self = shift ;
    my $from = shift ;
    my $outType = IO::Compress::Base::Common::whatIsOutput($_[0]);

    $self->croakError("$from: output parameter not a filename, filehandle or scalar ref")
        if ! $outType ;

    #$self->croakError("$from: output filename is undef or null string")
        #if $outType eq 'filename' && (! defined $_[0] || $_[0] eq '')  ;

    $self->croakError("$from: output buffer is read-only")
        if $outType eq 'buffer' && Scalar::Util::readonly(${ $_[0] });
    
    return 1;    
}


sub _def
{
    my $obj = shift ;
    
    my $class= (caller)[0] ;
    my $name = (caller(1))[3] ;

    $obj->croakError("$name: expected at least 1 parameters\n")
        unless @_ >= 1 ;

    my $input = shift ;
    my $haveOut = @_ ;
    my $output = shift ;

    my $x = new IO::Compress::Base::Validator($class, *$obj->{Error}, $name, $input, $output)
        or return undef ;

    push @_, $output if $haveOut && $x->{Hash};

    *$obj->{OneShot} = 1 ;

    my $got = $obj->checkParams($name, undef, @_)
        or return undef ;

    $x->{Got} = $got ;

#    if ($x->{Hash})
#    {
#        while (my($k, $v) = each %$input)
#        {
#            $v = \$input->{$k} 
#                unless defined $v ;
#
#            $obj->_singleTarget($x, 1, $k, $v, @_)
#                or return undef ;
#        }
#
#        return keys %$input ;
#    }

    if ($x->{GlobMap})
    {
        $x->{oneInput} = 1 ;
        foreach my $pair (@{ $x->{Pairs} })
        {
            my ($from, $to) = @$pair ;
            $obj->_singleTarget($x, 1, $from, $to, @_)
                or return undef ;
        }

        return scalar @{ $x->{Pairs} } ;
    }

    if (! $x->{oneOutput} )
    {
        my $inFile = ($x->{inType} eq 'filenames' 
                        || $x->{inType} eq 'filename');

        $x->{inType} = $inFile ? 'filename' : 'buffer';
        
        foreach my $in ($x->{oneInput} ? $input : @$input)
        {
            my $out ;
            $x->{oneInput} = 1 ;

            $obj->_singleTarget($x, $inFile, $in, \$out, @_)
                or return undef ;

            push @$output, \$out ;
            #if ($x->{outType} eq 'array')
            #  { push @$output, \$out }
            #else
            #  { $output->{$in} = \$out }
        }

        return 1 ;
    }

    # finally the 1 to 1 and n to 1
    return $obj->_singleTarget($x, 1, $input, $output, @_);

    Carp::croak "should not be here" ;
}

sub _singleTarget
{
    my $obj             = shift ;
    my $x               = shift ;
    my $inputIsFilename = shift;
    my $input           = shift;
    
    if ($x->{oneInput})
    {
        $obj->getFileInfo($x->{Got}, $input)
            if isaScalar($input) || (isaFilename($input) and $inputIsFilename) ;

        my $z = $obj->_create($x->{Got}, @_)
            or return undef ;


        defined $z->_wr2($input, $inputIsFilename) 
            or return $z->closeError(undef) ;

        return $z->close() ;
    }
    else
    {
        my $afterFirst = 0 ;
        my $inputIsFilename = ($x->{inType} ne 'array');
        my $keep = $x->{Got}->clone();

        #for my $element ( ($x->{inType} eq 'hash') ? keys %$input : @$input)
        for my $element ( @$input)
        {
            my $isFilename = isaFilename($element);

            if ( $afterFirst ++ )
            {
                defined addInterStream($obj, $element, $isFilename)
                    or return $obj->closeError(undef) ;
            }
            else
            {
                $obj->getFileInfo($x->{Got}, $element)
                    if isaScalar($element) || $isFilename;

                $obj->_create($x->{Got}, @_)
                    or return undef ;
            }

            defined $obj->_wr2($element, $isFilename) 
                or return $obj->closeError(undef) ;

            *$obj->{Got} = $keep->clone();
        }
        return $obj->close() ;
    }

}

sub _wr2
{
    my $self = shift ;

    my $source = shift ;
    my $inputIsFilename = shift;

    my $input = $source ;
    if (! $inputIsFilename)
    {
        $input = \$source 
            if ! ref $source;
    }

    if ( ref $input && ref $input eq 'SCALAR' )
    {
        return $self->syswrite($input, @_) ;
    }

    if ( ! ref $input  || isaFilehandle($input))
    {
        my $isFilehandle = isaFilehandle($input) ;

        my $fh = $input ;

        if ( ! $isFilehandle )
        {
            $fh = new IO::File "<$input"
                or return $self->saveErrorString(undef, "cannot open file '$input': $!", $!) ;
        }
        binmode $fh if *$self->{Got}->valueOrDefault('binmodein') ;

        my $status ;
        my $buff ;
        my $count = 0 ;
        while ($status = read($fh, $buff, 16 * 1024)) {
            $count += length $buff;
            defined $self->syswrite($buff, @_) 
                or return undef ;
        }

        return $self->saveErrorString(undef, $!, $!) 
            if ! defined $status ;

        if ( (!$isFilehandle || *$self->{AutoClose}) && $input ne '-')
        {    
            $fh->close() 
                or return undef ;
        }

        return $count ;
    }

    Carp::croak "Should not be here";
    return undef;
}

sub addInterStream
{
    my $self = shift ;
    my $input = shift ;
    my $inputIsFilename = shift ;

    if (*$self->{Got}->getValue('multistream'))
    {
        $self->getFileInfo(*$self->{Got}, $input)
            #if isaFilename($input) and $inputIsFilename ;
            if isaScalar($input) || isaFilename($input) ;

        # TODO -- newStream needs to allow gzip/zip header to be modified
        return $self->newStream();
    }
    elsif (*$self->{Got}->getValue('autoflush'))
    {
        #return $self->flush(Z_FULL_FLUSH);
    }

    return 1 ;
}

sub getFileInfo
{
}

sub TIEHANDLE
{
    return $_[0] if ref($_[0]);
    die "OOPS\n" ;
}
  
sub UNTIE
{
    my $self = shift ;
}

sub DESTROY
{
    my $self = shift ;
    local ($., $@, $!, $^E, $?);
    
    $self->close() ;

    # TODO - memory leak with 5.8.0 - this isn't called until 
    #        global destruction
    #
    %{ *$self } = () ;
    undef $self ;
}


sub filterUncompressed
{
}

sub syswrite
{
    my $self = shift ;

    my $buffer ;
    if (ref $_[0] ) {
        $self->croakError( *$self->{ClassName} . "::write: not a scalar reference" )
            unless ref $_[0] eq 'SCALAR' ;
        $buffer = $_[0] ;
    }
    else {
        $buffer = \$_[0] ;
    }

    if (@_ > 1) {
        my $slen = defined $$buffer ? length($$buffer) : 0;
        my $len = $slen;
        my $offset = 0;
        $len = $_[1] if $_[1] < $len;

        if (@_ > 2) {
            $offset = $_[2] || 0;
            $self->croakError(*$self->{ClassName} . "::write: offset outside string") 
                if $offset > $slen;
            if ($offset < 0) {
                $offset += $slen;
                $self->croakError( *$self->{ClassName} . "::write: offset outside string") if $offset < 0;
            }
            my $rem = $slen - $offset;
            $len = $rem if $rem < $len;
        }

        $buffer = \substr($$buffer, $offset, $len) ;
    }

    return 0 if (! defined $$buffer || length $$buffer == 0) && ! *$self->{FlushPending};
    
#    *$self->{Pending} .= $$buffer ;
#    
#    return length $$buffer
#        if (length *$self->{Pending} < 1024 * 16 && ! *$self->{FlushPending}) ;
#
#    $$buffer = *$self->{Pending} ; 
#    *$self->{Pending} = '';
    
    if (*$self->{Encoding}) {      
        $$buffer = *$self->{Encoding}->encode($$buffer);
    }
    else {
        $] >= 5.008 and ( utf8::downgrade($$buffer, 1) 
            or Carp::croak "Wide character in " .  *$self->{ClassName} . "::write:");
    }

    $self->filterUncompressed($buffer);

    my $buffer_length = defined $$buffer ? length($$buffer) : 0 ;
    *$self->{UnCompSize}->add($buffer_length) ;

    my $outBuffer='';
    my $status = *$self->{Compress}->compr($buffer, $outBuffer) ;

    return $self->saveErrorString(undef, *$self->{Compress}{Error}, 
                                         *$self->{Compress}{ErrorNo})
        if $status == STATUS_ERROR;

    *$self->{CompSize}->add(length $outBuffer) ;

    $self->outputPayload($outBuffer)
        or return undef;

    return $buffer_length;
}

sub print
{
    my $self = shift;

    #if (ref $self) {
    #    $self = *$self{GLOB} ;
    #}

    if (defined $\) {
        if (defined $,) {
            defined $self->syswrite(join($,, @_) . $\);
        } else {
            defined $self->syswrite(join("", @_) . $\);
        }
    } else {
        if (defined $,) {
            defined $self->syswrite(join($,, @_));
        } else {
            defined $self->syswrite(join("", @_));
        }
    }
}

sub printf
{
    my $self = shift;
    my $fmt = shift;
    defined $self->syswrite(sprintf($fmt, @_));
}

sub _flushCompressed
{
    my $self = shift ;

    my $outBuffer='';
    my $status = *$self->{Compress}->flush($outBuffer, @_) ;
    return $self->saveErrorString(0, *$self->{Compress}{Error}, 
                                    *$self->{Compress}{ErrorNo})
        if $status == STATUS_ERROR;

    if ( defined *$self->{FH} ) {
        *$self->{FH}->clearerr();
    }

    *$self->{CompSize}->add(length $outBuffer) ;

    $self->outputPayload($outBuffer)
        or return 0;
    return 1;        
}

sub flush
{   
    my $self = shift ;

    $self->_flushCompressed(@_)
        or return 0;        

    if ( defined *$self->{FH} ) {
        defined *$self->{FH}->flush()
            or return $self->saveErrorString(0, $!, $!); 
    }

    return 1;
}

sub beforePayload
{
}

sub _newStream
{
    my $self = shift ;
    my $got  = shift;

    my $class = ref $self;

    $self->_writeTrailer()
        or return 0 ;

    $self->ckParams($got)
        or $self->croakError("newStream: $self->{Error}");

    if ($got->getValue('encode')) { 
        my $want_encoding = $got->getValue('encode');
        *$self->{Encoding} = IO::Compress::Base::Common::getEncoding($self, $class, $want_encoding);
    }
    else {
        *$self->{Encoding} = undef;
    }
    
    *$self->{Compress} = $self->mkComp($got)
        or return 0;

    *$self->{Header} = $self->mkHeader($got) ;
    $self->output(*$self->{Header} )
        or return 0;
    
    *$self->{UnCompSize}->reset();
    *$self->{CompSize}->reset();

    $self->beforePayload();

    return 1 ;
}

sub newStream
{
    my $self = shift ;
  
    my $got = $self->checkParams('newStream', *$self->{Got}, @_)
        or return 0 ;    

    $self->_newStream($got);

#    *$self->{Compress} = $self->mkComp($got)
#        or return 0;
#
#    *$self->{Header} = $self->mkHeader($got) ;
#    $self->output(*$self->{Header} )
#        or return 0;
#    
#    *$self->{UnCompSize}->reset();
#    *$self->{CompSize}->reset();
#
#    $self->beforePayload();
#
#    return 1 ;
}

sub reset
{
    my $self = shift ;
    return *$self->{Compress}->reset() ;
}

sub _writeTrailer
{
    my $self = shift ;

    my $trailer = '';

    my $status = *$self->{Compress}->close($trailer) ;
    return $self->saveErrorString(0, *$self->{Compress}{Error}, *$self->{Compress}{ErrorNo})
        if $status == STATUS_ERROR;

    *$self->{CompSize}->add(length $trailer) ;

    $trailer .= $self->mkTrailer();
    defined $trailer
      or return 0;

    return $self->output($trailer);
}

sub _writeFinalTrailer
{
    my $self = shift ;

    return $self->output($self->mkFinalTrailer());
}

sub close
{
    my $self = shift ;
    return 1 if *$self->{Closed} || ! *$self->{Compress} ;
    *$self->{Closed} = 1 ;

    untie *$self 
        if $] >= 5.008 ;

    *$self->{FlushPending} = 1 ;
    $self->_writeTrailer()
        or return 0 ;

    $self->_writeFinalTrailer()
        or return 0 ;

    $self->output( "", 1 )
        or return 0;

    if (defined *$self->{FH}) {

        if ((! *$self->{Handle} || *$self->{AutoClose}) && ! *$self->{StdIO}) {
            $! = 0 ;
            *$self->{FH}->close()
                or return $self->saveErrorString(0, $!, $!); 
        }
        delete *$self->{FH} ;
        # This delete can set $! in older Perls, so reset the errno
        $! = 0 ;
    }

    return 1;
}


#sub total_in
#sub total_out
#sub msg
#
#sub crc
#{
#    my $self = shift ;
#    return *$self->{Compress}->crc32() ;
#}
#
#sub msg
#{
#    my $self = shift ;
#    return *$self->{Compress}->msg() ;
#}
#
#sub dict_adler
#{
#    my $self = shift ;
#    return *$self->{Compress}->dict_adler() ;
#}
#
#sub get_Level
#{
#    my $self = shift ;
#    return *$self->{Compress}->get_Level() ;
#}
#
#sub get_Strategy
#{
#    my $self = shift ;
#    return *$self->{Compress}->get_Strategy() ;
#}


sub tell
{
    my $self = shift ;

    return *$self->{UnCompSize}->get32bit() ;
}

sub eof
{
    my $self = shift ;

    return *$self->{Closed} ;
}


sub seek
{
    my $self     = shift ;
    my $position = shift;
    my $whence   = shift ;

    my $here = $self->tell() ;
    my $target = 0 ;

    #use IO::Handle qw(SEEK_SET SEEK_CUR SEEK_END);
    use IO::Handle ;

    if ($whence == IO::Handle::SEEK_SET) {
        $target = $position ;
    }
    elsif ($whence == IO::Handle::SEEK_CUR || $whence == IO::Handle::SEEK_END) {
        $target = $here + $position ;
    }
    else {
        $self->croakError(*$self->{ClassName} . "::seek: unknown value, $whence, for whence parameter");
    }

    # short circuit if seeking to current offset
    return 1 if $target == $here ;    

    # Outlaw any attempt to seek backwards
    $self->croakError(*$self->{ClassName} . "::seek: cannot seek backwards")
        if $target < $here ;

    # Walk the file to the new offset
    my $offset = $target - $here ;

    my $buffer ;
    defined $self->syswrite("\x00" x $offset)
        or return 0;

    return 1 ;
}

sub binmode
{
    1;
#    my $self     = shift ;
#    return defined *$self->{FH} 
#            ? binmode *$self->{FH} 
#            : 1 ;
}

sub fileno
{
    my $self     = shift ;
    return defined *$self->{FH} 
            ? *$self->{FH}->fileno() 
            : undef ;
}

sub opened
{
    my $self     = shift ;
    return ! *$self->{Closed} ;
}

sub autoflush
{
    my $self     = shift ;
    return defined *$self->{FH} 
            ? *$self->{FH}->autoflush(@_) 
            : undef ;
}

sub input_line_number
{
    return undef ;
}


sub _notAvailable
{
    my $name = shift ;
    return sub { Carp::croak "$name Not Available: File opened only for output" ; } ;
}

*read     = _notAvailable('read');
*READ     = _notAvailable('read');
*readline = _notAvailable('readline');
*READLINE = _notAvailable('readline');
*getc     = _notAvailable('getc');
*GETC     = _notAvailable('getc');

*FILENO   = \&fileno;
*PRINT    = \&print;
*PRINTF   = \&printf;
*WRITE    = \&syswrite;
*write    = \&syswrite;
*SEEK     = \&seek; 
*TELL     = \&tell;
*EOF      = \&eof;
*CLOSE    = \&close;
*BINMODE  = \&binmode;

#*sysread  = \&_notAvailable;
#*syswrite = \&_write;

1; 

__END__

=head1 NAME

IO::Compress::Base - Base Class for IO::Compress modules 

=head1 SYNOPSIS

    use IO::Compress::Base ;

=head1 DESCRIPTION

This module is not intended for direct use in application code. Its sole
purpose if to to be sub-classed by IO::Compress modules.

=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::Lzop>, L<IO::Uncompress::UnLzop>, L<IO::Compress::Lzf>, L<IO::Uncompress::UnLzf>, 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, F<pmqs@cpan.org>. 

=head1 MODIFICATION HISTORY

See the Changes file.

=head1 COPYRIGHT AND LICENSE

Copyright (c) 2005-2013 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     �siZ��      Compress/Zip/Constants.pmnu �[���        package IO::Compress::Zip::Constants;

use strict ;
use warnings;

require Exporter;

our ($VERSION, @ISA, @EXPORT, %ZIP_CM_MIN_VERSIONS);

$VERSION = '2.061';

@ISA = qw(Exporter);

@EXPORT= qw(

    ZIP_CM_STORE
    ZIP_CM_DEFLATE
    ZIP_CM_BZIP2
    ZIP_CM_LZMA
    ZIP_CM_PPMD
    
    ZIP_LOCAL_HDR_SIG
    ZIP_DATA_HDR_SIG
    ZIP_CENTRAL_HDR_SIG
    ZIP_END_CENTRAL_HDR_SIG
    ZIP64_END_CENTRAL_REC_HDR_SIG
    ZIP64_END_CENTRAL_LOC_HDR_SIG
    ZIP64_ARCHIVE_EXTRA_SIG
    ZIP64_DIGITAL_SIGNATURE_SIG

    ZIP_GP_FLAG_ENCRYPTED_MASK
    ZIP_GP_FLAG_STREAMING_MASK
    ZIP_GP_FLAG_PATCHED_MASK
    ZIP_GP_FLAG_STRONG_ENCRYPTED_MASK
    ZIP_GP_FLAG_LZMA_EOS_PRESENT
    ZIP_GP_FLAG_LANGUAGE_ENCODING

    ZIP_EXTRA_ID_ZIP64
    ZIP_EXTRA_ID_EXT_TIMESTAMP
    ZIP_EXTRA_ID_INFO_ZIP_UNIX2
    ZIP_EXTRA_ID_INFO_ZIP_UNIXN
    ZIP_EXTRA_ID_INFO_ZIP_Upath
    ZIP_EXTRA_ID_INFO_ZIP_Ucom        
    ZIP_EXTRA_ID_JAVA_EXE

    ZIP_OS_CODE_UNIX
    ZIP_OS_CODE_DEFAULT

    ZIP_IFA_TEXT_MASK

    %ZIP_CM_MIN_VERSIONS
    ZIP64_MIN_VERSION

    ZIP_A_RONLY
    ZIP_A_HIDDEN
    ZIP_A_SYSTEM
    ZIP_A_LABEL
    ZIP_A_DIR 
    ZIP_A_ARCHIVE
    );

# Compression types supported
use constant ZIP_CM_STORE                      => 0 ;
use constant ZIP_CM_DEFLATE                    => 8 ;
use constant ZIP_CM_BZIP2                      => 12 ;
use constant ZIP_CM_LZMA                       => 14 ; # Not Supported yet
use constant ZIP_CM_PPMD                       => 98 ; # Not Supported yet

# General Purpose Flag
use constant ZIP_GP_FLAG_ENCRYPTED_MASK        => (1 << 0) ;
use constant ZIP_GP_FLAG_STREAMING_MASK        => (1 << 3) ;
use constant ZIP_GP_FLAG_PATCHED_MASK          => (1 << 5) ;
use constant ZIP_GP_FLAG_STRONG_ENCRYPTED_MASK => (1 << 6) ;
use constant ZIP_GP_FLAG_LZMA_EOS_PRESENT      => (1 << 1) ;
use constant ZIP_GP_FLAG_LANGUAGE_ENCODING     => (1 << 11) ;

# Internal File Attributes
use constant ZIP_IFA_TEXT_MASK                 => 1;

# Signatures for each of the headers
use constant ZIP_LOCAL_HDR_SIG                 => 0x04034b50;
use constant ZIP_DATA_HDR_SIG                  => 0x08074b50;
use constant packed_ZIP_DATA_HDR_SIG           => pack "V", ZIP_DATA_HDR_SIG;
use constant ZIP_CENTRAL_HDR_SIG               => 0x02014b50;
use constant ZIP_END_CENTRAL_HDR_SIG           => 0x06054b50;
use constant ZIP64_END_CENTRAL_REC_HDR_SIG     => 0x06064b50;
use constant ZIP64_END_CENTRAL_LOC_HDR_SIG     => 0x07064b50;
use constant ZIP64_ARCHIVE_EXTRA_SIG           => 0x08064b50;
use constant ZIP64_DIGITAL_SIGNATURE_SIG       => 0x05054b50;

use constant ZIP_OS_CODE_UNIX                  => 3;
use constant ZIP_OS_CODE_DEFAULT               => 3;

# Extra Field ID's
use constant ZIP_EXTRA_ID_ZIP64                => pack "v", 1;
use constant ZIP_EXTRA_ID_EXT_TIMESTAMP        => "UT";
use constant ZIP_EXTRA_ID_INFO_ZIP_UNIX2       => "Ux";
use constant ZIP_EXTRA_ID_INFO_ZIP_UNIXN       => "ux";
use constant ZIP_EXTRA_ID_INFO_ZIP_Upath       => "up";
use constant ZIP_EXTRA_ID_INFO_ZIP_Ucom        => "uc";
use constant ZIP_EXTRA_ID_JAVA_EXE             => pack "v", 0xCAFE;

# DOS Attributes
use constant ZIP_A_RONLY                       => 0x01;
use constant ZIP_A_HIDDEN                      => 0x02;
use constant ZIP_A_SYSTEM                      => 0x04;
use constant ZIP_A_LABEL                       => 0x08;
use constant ZIP_A_DIR                         => 0x10;
use constant ZIP_A_ARCHIVE                     => 0x20;

use constant ZIP64_MIN_VERSION                 => 45;

%ZIP_CM_MIN_VERSIONS = (
            ZIP_CM_STORE()                     => 20,
            ZIP_CM_DEFLATE()                   => 20,
            ZIP_CM_BZIP2()                     => 46,
            ZIP_CM_LZMA()                      => 63,
            ZIP_CM_PPMD()                      => 63,
            );


1;

__END__

PK     �siZ1/�F  �F    Compress/Bzip2.pmnu �[���        package IO::Compress::Bzip2 ;

use strict ;
use warnings;
use bytes;
require Exporter ;

use IO::Compress::Base 2.061 ;

use IO::Compress::Base::Common  2.061 qw();
use IO::Compress::Adapter::Bzip2 2.061 ;


our ($VERSION, @ISA, @EXPORT_OK, %EXPORT_TAGS, $Bzip2Error);

$VERSION = '2.061';
$Bzip2Error = '';

@ISA    = qw(Exporter IO::Compress::Base);
@EXPORT_OK = qw( $Bzip2Error bzip2 ) ;
%EXPORT_TAGS = %IO::Compress::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, \$Bzip2Error);
    return $obj->_create(undef, @_);
}

sub bzip2
{
    my $obj = IO::Compress::Base::Common::createSelfTiedObject(undef, \$Bzip2Error);
    $obj->_def(@_);
}


sub mkHeader 
{
    my $self = shift ;
    return '';

}

sub getExtraParams
{
    my $self = shift ;

    use IO::Compress::Base::Common  2.061 qw(:Parse);
    
    return (  
            'blocksize100k' => [IO::Compress::Base::Common::Parse_unsigned,  1],
            'workfactor'    => [IO::Compress::Base::Common::Parse_unsigned,  0],
            'verbosity'     => [IO::Compress::Base::Common::Parse_boolean,   0],
        );
}


sub ckParams
{
    my $self = shift ;
    my $got = shift;
    
    # check that BlockSize100K is a number between 1 & 9
    if ($got->parsed('blocksize100k')) {
        my $value = $got->getValue('blocksize100k');
        return $self->saveErrorString(undef, "Parameter 'BlockSize100K' not between 1 and 9, got $value")
            unless defined $value && $value >= 1 && $value <= 9;

    }

    # check that WorkFactor between 0 & 250
    if ($got->parsed('workfactor')) {
        my $value = $got->getValue('workfactor');
        return $self->saveErrorString(undef, "Parameter 'WorkFactor' not between 0 and 250, got $value")
            unless $value >= 0 && $value <= 250;
    }

    return 1 ;
}


sub mkComp
{
    my $self = shift ;
    my $got = shift ;

    my $BlockSize100K = $got->getValue('blocksize100k');
    my $WorkFactor    = $got->getValue('workfactor');
    my $Verbosity     = $got->getValue('verbosity');

    my ($obj, $errstr, $errno) = IO::Compress::Adapter::Bzip2::mkCompObject(
                                               $BlockSize100K, $WorkFactor,
                                               $Verbosity);

    return $self->saveErrorString(undef, $errstr, $errno)
        if ! defined $obj;
    
    return $obj;
}


sub mkTrailer
{
    my $self = shift ;
    return '';
}

sub mkFinalTrailer
{
    return '';
}

#sub newHeader
#{
#    my $self = shift ;
#    return '';
#}

sub getInverseClass
{
    return ('IO::Uncompress::Bunzip2');
}

sub getFileInfo
{
    my $self = shift ;
    my $params = shift;
    my $file = shift ;
    
}

1;

__END__

=head1 NAME

IO::Compress::Bzip2 - Write bzip2 files/buffers
 
 
=head1 SYNOPSIS

    use IO::Compress::Bzip2 qw(bzip2 $Bzip2Error) ;

    my $status = bzip2 $input => $output [,OPTS] 
        or die "bzip2 failed: $Bzip2Error\n";

    my $z = new IO::Compress::Bzip2 $output [,OPTS]
        or die "bzip2 failed: $Bzip2Error\n";

    $z->print($string);
    $z->printf($format, $string);
    $z->write($string);
    $z->syswrite($string [, $length, $offset]);
    $z->flush();
    $z->tell();
    $z->eof();
    $z->seek($position, $whence);
    $z->binmode();
    $z->fileno();
    $z->opened();
    $z->autoflush();
    $z->input_line_number();
    $z->newStream( [OPTS] );
    
    $z->close() ;

    $Bzip2Error ;

    # IO::File mode

    print $z $string;
    printf $z $format, $string;
    tell $z
    eof $z
    seek $z, $position, $whence
    binmode $z
    fileno $z
    close $z ;
    

=head1 DESCRIPTION

This module provides a Perl interface that allows writing bzip2 
compressed data to files or buffer.

For reading bzip2 files/buffers, see the companion module 
L<IO::Uncompress::Bunzip2|IO::Uncompress::Bunzip2>.

=head1 Functional Interface

A top-level function, C<bzip2>, is provided to carry out
"one-shot" compression between buffers and/or files. For finer
control over the compression process, see the L</"OO Interface">
section.

    use IO::Compress::Bzip2 qw(bzip2 $Bzip2Error) ;

    bzip2 $input => $output [,OPTS] 
        or die "bzip2 failed: $Bzip2Error\n";

The functional interface needs Perl5.005 or better.

=head2 bzip2 $input => $output [, OPTS]

C<bzip2> expects at least two parameters, C<$input> and C<$output>.

=head3 The C<$input> parameter

The parameter, C<$input>, is used to define the source of
the uncompressed data. 

It can take one of the following forms:

=over 5

=item A filename

If the C<$input> 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> 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> is a scalar reference, the input data will be read
from C<$$input>.

=item An array reference 

If C<$input> 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 compressed.

=item An Input FileGlob string

If C<$input> is a string that is delimited by the characters "<" and ">"
C<bzip2> will assume that it is an I<input fileglob string>. The
input is the list of files that match the fileglob.

If the fileglob does not match any files ...

See L<File::GlobMapper|File::GlobMapper> for more details.

=back

If the C<$input> parameter is any other type, C<undef> will be returned.

=head3 The C<$output> parameter

The parameter C<$output> is used to control the destination of the
compressed data. This parameter can take one of these forms.

=over 5

=item A filename

If the C<$output> parameter is a simple scalar, it is assumed to be a
filename.  This file will be opened for writing and the compressed
data will be written to it.

=item A filehandle

If the C<$output> parameter is a filehandle, the compressed data
will be written to it.
The string '-' can be used as an alias for standard output.

=item A scalar reference 

If C<$output> is a scalar reference, the compressed data will be
stored in C<$$output>.

=item An Array Reference

If C<$output> is an array reference, the compressed data will be
pushed onto the array.

=item An Output FileGlob

If C<$output> is a string that is delimited by the characters "<" and ">"
C<bzip2> will assume that it is an I<output fileglob string>. The
output is the list of files that match the fileglob.

When C<$output> is an fileglob string, C<$input> must also be a fileglob
string. Anything else is an error.

=back

If the C<$output> parameter is any other type, C<undef> will be returned.

=head2 Notes

When C<$input> maps to multiple files/buffers and C<$output> is a single
file/buffer the input files/buffers will be stored
in C<$output> as a concatenated series of compressed data streams.

=head2 Optional Parameters

Unless specified below, the optional parameters for C<bzip2>,
C<OPTS>, are the same as those used with the OO interface defined in the
L</"Constructor Options"> section below.

=over 5

=item C<< AutoClose => 0|1 >>

This option applies to any input or output data streams to 
C<bzip2> 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<bzip2> has
completed.

This parameter defaults to 0.

=item C<< BinModeIn => 0|1 >>

When reading from a file or filehandle, set C<binmode> before reading.

Defaults to 0.

=item C<< Append => 0|1 >>

TODO

=back

=head2 Examples

To read the contents of the file C<file1.txt> and write the compressed
data to the file C<file1.txt.bz2>.

    use strict ;
    use warnings ;
    use IO::Compress::Bzip2 qw(bzip2 $Bzip2Error) ;

    my $input = "file1.txt";
    bzip2 $input => "$input.bz2"
        or die "bzip2 failed: $Bzip2Error\n";

To read from an existing Perl filehandle, C<$input>, and write the
compressed data to a buffer, C<$buffer>.

    use strict ;
    use warnings ;
    use IO::Compress::Bzip2 qw(bzip2 $Bzip2Error) ;
    use IO::File ;

    my $input = new IO::File "<file1.txt"
        or die "Cannot open 'file1.txt': $!\n" ;
    my $buffer ;
    bzip2 $input => \$buffer 
        or die "bzip2 failed: $Bzip2Error\n";

To compress all files in the directory "/my/home" that match "*.txt"
and store the compressed data in the same directory

    use strict ;
    use warnings ;
    use IO::Compress::Bzip2 qw(bzip2 $Bzip2Error) ;

    bzip2 '</my/home/*.txt>' => '<*.bz2>'
        or die "bzip2 failed: $Bzip2Error\n";

and if you want to compress each file one at a time, this will do the trick

    use strict ;
    use warnings ;
    use IO::Compress::Bzip2 qw(bzip2 $Bzip2Error) ;

    for my $input ( glob "/my/home/*.txt" )
    {
        my $output = "$input.bz2" ;
        bzip2 $input => $output 
            or die "Error compressing '$input': $Bzip2Error\n";
    }

=head1 OO Interface

=head2 Constructor

The format of the constructor for C<IO::Compress::Bzip2> is shown below

    my $z = new IO::Compress::Bzip2 $output [,OPTS]
        or die "IO::Compress::Bzip2 failed: $Bzip2Error\n";

It returns an C<IO::Compress::Bzip2> object on success and undef on failure. 
The variable C<$Bzip2Error> will contain an error message on failure.

If you are running Perl 5.005 or better the object, C<$z>, returned from 
IO::Compress::Bzip2 can be used exactly like an L<IO::File|IO::File> filehandle. 
This means that all normal output file operations can be carried out 
with C<$z>. 
For example, to write to a compressed file/buffer you can use either of 
these forms

    $z->print("hello world\n");
    print $z "hello world\n";

The mandatory parameter C<$output> is used to control the destination
of the compressed data. This parameter can take one of these forms.

=over 5

=item A filename

If the C<$output> parameter is a simple scalar, it is assumed to be a
filename. This file will be opened for writing and the compressed data
will be written to it.

=item A filehandle

If the C<$output> parameter is a filehandle, the compressed data will be
written to it.
The string '-' can be used as an alias for standard output.

=item A scalar reference 

If C<$output> is a scalar reference, the compressed data will be stored
in C<$$output>.

=back

If the C<$output> parameter is any other type, C<IO::Compress::Bzip2>::new will
return undef.

=head2 Constructor Options

C<OPTS> is any combination of the following options:

=over 5

=item C<< AutoClose => 0|1 >>

This option is only valid when the C<$output> parameter is a filehandle. If
specified, and the value is true, it will result in the C<$output> being
closed once either the C<close> method is called or the C<IO::Compress::Bzip2>
object is destroyed.

This parameter defaults to 0.

=item C<< Append => 0|1 >>

Opens C<$output> in append mode. 

The behaviour of this option is dependent on the type of C<$output>.

=over 5

=item * A Buffer

If C<$output> is a buffer and C<Append> is enabled, all compressed data
will be append to the end if C<$output>. Otherwise C<$output> will be
cleared before any data is written to it.

=item * A Filename

If C<$output> is a filename and 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 compressed data is written to it.

=item * A Filehandle

If C<$output> is a filehandle, the file pointer will be positioned to the
end of the file via a call to C<seek> before any compressed data is written
to it.  Otherwise the file pointer will not be moved.

=back

This parameter defaults to 0.

=item C<< BlockSize100K => number >>

Specify the number of 100K blocks bzip2 uses during compression. 

Valid values are from 1 to 9, where 9 is best compression.

The default is 1.

=item C<< WorkFactor => number >>

Specifies how much effort bzip2 should take before resorting to a slower
fallback compression algorithm.

Valid values range from 0 to 250, where 0 means use the default value 30.

The default is 0.

=item C<< Strict => 0|1 >>

This is a placeholder option.

=back

=head2 Examples

TODO

=head1 Methods 

=head2 print

Usage is

    $z->print($data)
    print $z $data

Compresses and outputs the contents of the C<$data> parameter. This
has the same behaviour as the C<print> built-in.

Returns true if successful.

=head2 printf

Usage is

    $z->printf($format, $data)
    printf $z $format, $data

Compresses and outputs the contents of the C<$data> parameter.

Returns true if successful.

=head2 syswrite

Usage is

    $z->syswrite $data
    $z->syswrite $data, $length
    $z->syswrite $data, $length, $offset

Compresses and outputs the contents of the C<$data> parameter.

Returns the number of uncompressed bytes written, or C<undef> if
unsuccessful.

=head2 write

Usage is

    $z->write $data
    $z->write $data, $length
    $z->write $data, $length, $offset

Compresses and outputs the contents of the C<$data> parameter.

Returns the number of uncompressed bytes written, or C<undef> if
unsuccessful.

=head2 flush

Usage is

    $z->flush;

Flushes any pending compressed data to the output file/buffer.

TODO

Returns true on success.

=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 C<close> method has been called.

=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 output file/buffer.
It is a fatal error to attempt to seek backward.

Empty parts of the file/buffer will have NULL (0x00) bytes written to them.

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)

This method always returns C<undef> when compressing. 

=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 is associated with a buffer, this method will return
C<undef>.

=head2 close

    $z->close() ;
    close $z ;

Flushes any pending compressed data and then closes the output file/buffer. 

For most versions of Perl this method will be automatically invoked if
the IO::Compress::Bzip2 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::Compress::Bzip2
object was created, and the object is associated with a file, the
underlying file will also be closed.

=head2 newStream([OPTS])

Usage is

    $z->newStream( [OPTS] )

Closes the current compressed data stream and starts a new one.

OPTS consists of any of the the options that are available when creating
the C<$z> object.

See the L</"Constructor Options"> section for more details.

=head1 Importing 

No symbolic constants are required by this IO::Compress::Bzip2 at present. 

=over 5

=item :all

Imports C<bzip2> and C<$Bzip2Error>.
Same as doing this

    use IO::Compress::Bzip2 qw(bzip2 $Bzip2Error) ;

    
=back

=head1 EXAMPLES

=head2 Apache::GZip Revisited

See L<IO::Compress::Bzip2::FAQ|IO::Compress::Bzip2::FAQ/"Apache::GZip Revisited">

    
=head2 Working with Net::FTP

See L<IO::Compress::Bzip2::FAQ|IO::Compress::Bzip2::FAQ/"Compressed files and Net::FTP">

=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::Uncompress::Bunzip2>, L<IO::Compress::Lzop>, L<IO::Uncompress::UnLzop>, L<IO::Compress::Lzf>, L<IO::Uncompress::UnLzf>, L<IO::Uncompress::AnyInflate>, L<IO::Uncompress::AnyUncompress>

L<Compress::Zlib::FAQ|Compress::Zlib::FAQ>

L<File::GlobMapper|File::GlobMapper>, L<Archive::Zip|Archive::Zip>,
L<Archive::Tar|Archive::Tar>,
L<IO::Zlib|IO::Zlib>

The primary site for the bzip2 program is F<http://www.bzip.org>.

See the module L<Compress::Bzip2|Compress::Bzip2>

=head1 AUTHOR

This module was written by Paul Marquess, F<pmqs@cpan.org>. 

=head1 MODIFICATION HISTORY

See the Changes file.

=head1 COPYRIGHT AND LICENSE

Copyright (c) 2005-2008 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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