IO-Compress

                       Version 2.220

                       16 May 2026

    Copyright (c) 1995-2026 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.

DESCRIPTION

This distribution provides a Perl interface to allow reading and writing of compressed data created with the zlib and bzip2.

IO-Compress supports reading and writing of the following compressed data formats

• bzip2
• RFC 1950
• RFC 1951
• RFC 1952 (i.e. gzip)
• zip

There are a number of companion modules for IO-Compress that extend the suite of compression formats available.

• IO-Compress-Zstd Adds support for zstd (Zstandard).
• IO-Compress-Lzma Adds support for lzma, xz and lzip.
• IO-Compress-Lzf Adds support for lzf.
• IO-Compress-Lzop Adds support for lzop.

Note that the following modules used to be distributed separately, but are now included with the IO-Compress distribution.

Compress-Zlib
IO-Compress-Zlib
IO-Compress-Bzip2
IO-Compress-Base

PREREQUISITES

Before you can build IO-Compress you need to have the following installed on your system:

* Perl 5.006 or better.
* Compress::Raw::Zlib
* Compress::Raw::Bzip2

BUILDING THE MODULE

Assuming you have met all the prerequisites, the module can now be built using this sequence of commands:

perl Makefile.PL
make
make test

INSTALLATION

To install IO-Compress, run the command below:

make install

TROUBLESHOOTING

SUPPORT

General feedback/questions/bug reports should be sent to https://github.com/pmqs/IO-Compress/issues

FEEDBACK

How to report a problem with IO-Compress.

To help me help you, I need all of the following information:

1. The Versions of everything relevant. This includes:

   a. The complete output from running this

       perl -V
   
   Do not edit the output in any way.
   Note, I want you to run "perl -V" and NOT "perl -v".
   
   If your perl does not understand the "-V" option it is too
   old. This module needs Perl version 5.004 or better.

   b. The version of IO-Compress you have.

   If you have successfully installed IO-Compress, this one-liner
   will tell you:
   
      perl -MIO::Compress::Gzip -e 'print qq[ver $IO::Compress::Gzip::VERSION\n]'
   
   If you are  running windows use this
   
      perl -MIO::Compress::Gzip -e "print qq[ver $IO::Compress::Gzip::VERSION\n]"
   
   If you haven't installed IO-Compress then search IO::Compress::Gzip.pm
   for a line like this:
   
     $VERSION = "2.220" ;

2. If you are having problems building IO-Compress, send me a complete log of what happened. Start by unpacking the IO-Compress module into a fresh directory and keep a log of all the steps, including the setting of configuration environment variables (if applicable).

   [edit config.in or set environment variables, if necessary]
   perl Makefile.PL
   make
   make test TEST_VERBOSE=1

Paul Marquess pmqs@cpan.org