/ 
perl-5.11.3
River stage five • 11759 direct dependents • 33295 total dependents
/ Compress::Raw::Zlib::FAQ

NAME

Compress::Raw::Zlib::FAQ -- Frequently Asked Questions about Compress::Raw::Zlib

DESCRIPTION

Common questions answered.

Compatibility with Unix compress/uncompress.

This module is not compatible with Unix compress.

If you have the uncompress program available, you can use this to read compressed files

open F, "uncompress -c $filename |";
while (<F>)
{
    ...

Alternatively, if you have the 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 compress program available

open F, "| compress -c $filename ";
print F "data";
...
close F ;

Accessing .tar.Z files

See previous FAQ item.

If the Archive::Tar module is installed and either the uncompress or gunzip programs are available, you can use one of these workarounds to read .tar.Z files.

Firstly with uncompress

use strict;
use warnings;
use Archive::Tar;

open F, "uncompress -c $filename |";
my $tar = Archive::Tar->new(*F);
...

and this with gunzip

use strict;
use warnings;
use Archive::Tar;

open F, "gunzip -c $filename |";
my $tar = Archive::Tar->new(*F);
...

Similarly, if the compress program is available, you can use this to write a .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 ;

Accessing Zip Files

This module does not support reading/writing zip files.

Support for reading/writing zip files is included with the IO::Compress::Zip and IO::Uncompress::Unzip modules.

The primary focus of the IO::Compress::Zip and IO::Uncompress::Unzip modules is to provide an IO::File compatible streaming read/write interface to zip files/buffers. They are not fully flegged archivers. If you are looking for an archiver check out the Archive::Zip module. You can find it on CPAN at

http://www.cpan.org/modules/by-module/Archive/Archive-Zip-*.tar.gz

Zlib Library Version Support

By default Compress::Raw::Zlib will build with a private copy of version 1.2.3 of the zlib library. (See the README file for details of how to override this behaviour)

If you decide to use a different version of the zlib library, you need to be aware of the following issues

  • First off, you must have zlib 1.0.5 or better.

  • You need to have zlib 1.2.1 or better if you want to use the -Merge option with IO::Compress::Gzip, IO::Compress::Deflate and IO::Compress::RawDeflate.

SEE ALSO

Compress::Zlib, IO::Compress::Gzip, IO::Uncompress::Gunzip, IO::Compress::Deflate, IO::Uncompress::Inflate, IO::Compress::RawDeflate, IO::Uncompress::RawInflate, IO::Compress::Bzip2, IO::Uncompress::Bunzip2, IO::Compress::Lzop, IO::Uncompress::UnLzop, IO::Compress::Lzf, IO::Uncompress::UnLzf, IO::Uncompress::AnyInflate, IO::Uncompress::AnyUncompress

Compress::Zlib::FAQ

File::GlobMapper, Archive::Zip, Archive::Tar, IO::Zlib

AUTHOR

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

MODIFICATION HISTORY

See the Changes file.

COPYRIGHT AND LICENSE

Copyright (c) 2005-2009 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.